Piri Keşif Aracı

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

In this study, the welding process of 304 stainless steel/Q345R low alloy steel composite plate is modeled by experimental and finite element methods to study the complex thermomechanical behavior. The residual stress and microstructure evolution of composite plate in the welding process are also investigated. The welding thermal cycle curve and residual stress distribution at the joint are obtained by using thermocouple and blind-hole methods. Optical microscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy were used to investigate the evolution of microstructure, morphology, and element diffusion of the joint. The results show that the maximum von Mises welding residual stress is 312 MPa, which is located in the bottom of the start point of the weld zone. The residual stress gradually decreases and tends to be stable along the direction from the weld to the base metal. In addition, a residual stress discontinuity is found at the interface between the bimetal. It is also found that the closer it is to the weld joint, the more uniform is the austenite distribution and the smaller are the grain sizes.

Kaynak 1:

https://doi.org/10.3390/ma12213489 arayıcılığı görüntüle.
Kaynak 2:

http://dx.doi.org/10.3390/ma12213489 arayıcılığı görüntüle.

DOI : 10.3390/ma12213489

Anahtar Kelimeler : composite plate, thermomechanical behavior, microstructure, finite element analysis, welding residual stress, element diffusion

ISSN: 1996-1944
Cilt: 12
Sayı: 21
Sayfa: 3489

Sınıflandırma :

Malzeme Bilimi %100

Metalik Malzemeler %37

Malzeme Mühendisliği %26

Malzemelerin Karakterizasyonu ve Değerlendirilmesi %23

2

A Highly Sensitive Resistive Pressure Sensor Based on a Carbon Nanotube-Liquid Crystal-PDMS Composite

Dergi Makalesi

Kaynak 1:

Directory of Open Access Journals (DOAJ)

Kaynak 2:

PubMed

Kaynak 3:

MDPI

Dergi:

Nanomaterials

Yazar(lar) :

Jin Pan , Shiyu Liu , Yicheng Yang , Jiangang Lu

Yıl :

2018

Yicheng Yang

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Resistive pressure sensors generally employ microstructures such as pores and pyramids in the active layer or on the electrodes to reduce the Young’s modulus and improve the sensitivity. However, such pressure sensors always exhibit complex fabrication process and have difficulties in controlling the uniformity of microstructures. In this paper, we demonstrated a highly sensitive resistive pressure sensor based on a composite comprising of low-polarity liquid crystal (LPLC), multi-walled carbon nanotube (MWCNT), and polydimethylsiloxane (PDMS) elastomer. The LPLC in the PDMS forms a polymer-dispersed liquid crystal (PDLC) structure which can not only reduce the Young’s modulus but also contribute to the construction of conductive paths in the active layer. By optimizing the concentration of LC in PDMS elastomer, the resistive pressure sensor shows a high sensitivity of 5.35 kPa−1, fast response (<150 ms), and great durability. Fabrication process is also facile and the uniformity of the microstructures can be readily controlled. The pressure sensor offers great potential for applications in emerging wearable devices and electronic skins.

Kaynak 1:

https://doi.org/10.3390/nano8060413 arayıcılığı görüntüle.
Kaynak 2:

https://www.ncbi.nlm.nih.gov/pubmed/20361757 arayıcılığı görüntüle.
Kaynak 3:

http://dx.doi.org/10.3390/nano8060413 arayıcılığı görüntüle.

DOI : 10.3390/nano8060413

Anahtar Kelimeler : high sensitivity, polymer-dispersed liquid crystal (PDLC), multi-walled carbon nanotube (MWCNT), resistive pressure sensor

ISSN: 2079-4991
Cilt: 8
Sayı: 6
Sayfa: 413

3

GPU Based Real-time Shadow Research

Konferans Bildirileri

Kaynak :

IEEE Xplore

Yazar(lar) :

Jin Yicheng Yang Xiao

Konu :

Computing and Processing, Signal Processing and Analysis

Jin Yicheng Yang Xiao

Özet

Kaydet

Shadow can strengthen the reality of 3D virtual scene and provide important visual information for the objects’ spacial relationship in the scene. This paper presents a GPU based method for all the process of shadow volume algorithm. It can achieve greater shadow performance in Ship-handling simulator than previous methods by migrating the silhouette extraction and shadow volume rending to GPU, and applying a series of techniques for culling, clipping, and simplifying shadow volume geometry. We make a series of optimization for the visual system of the ship-handling simulator such as limit the range of illumination, the alternation of z-pass and z-fail algorithm, using the ultra shadow technology and two sided stencil buffer to accelerate the rending of shadow.

DOI : 10.1109/cgiv.2006.48

Anahtar Kelimeler : Layout, Computer graphics, Visual system, Marine vehicles, Light sources, Levee, Navigation, Acceleration, Computational modeling, Sun, computational geometry, computer graphic equipment, feature extraction, optimisation, rendering (computer graphics), virtual reality, virtual environment, shadow, GPU method, ultra-shadow, stencil buffer, virtual environment, shadow, GPU method, ultra-shadow, stencil buffer

4

Flexible and interpretable generalization of self-evolving computational materials framework

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Computers & Structures

Yayıncı:

Elsevier BV

Yazar(lar) :

Mohammed Bazroun , Yicheng Yang , In Ho Cho

Yıl :

2022

Yicheng Yang

Özet Ek Bilgiler

Kaydet

The recent innovations of computational material models by machine learning (ML) methods face formidable challenges. Incorporating internal heterogeneity and diverse boundary conditions (BC’s) into existing ML methods remains difficult, and the weak interpretability of ML remains unresolved. To tackle these challenges, this paper generalizes a recently developed self-evolving computational material models framework built upon Bayesian update and evolutionary algorithm. This paper proposes a new material-specific information index (II), which is capable of autonomously quantifying the internal heterogeneity and diverse BC’s. Also, this paper introduces highly flexible cubic regression spline (CRS)-based link functions which can offer mathematical expressions of salient material coefficients of the existing computational material models in terms of convolved II. Thereby, this paper suggests a novel means by which ML can directly leverage internal heterogeneity and diverse BC’s to autonomously evolve computational material models while keeping interpretability. Validations using a wide spectrum of large-scale reinforced composite structures confirm the favorable performance of the generalization. Example expansions of nonlinear shear of quasi-brittle materials and progressive compressive buckling of reinforcing steel underpin efficiency and accuracy of the generalization. This paper adds a meaningful avenue for accelerating the fusion of computational material models and ML.

DOI : 10.1016/j.compstruc.2021.106706

Anahtar Kelimeler : Evolutionary algorithm, Cubic regression spline, Computational material model, Machine learning for heterogeneity, Machine learning for varying boundary conditions, Nonlinear analysis of reinforced concrete structures

ISSN: 0045-7949
Cilt: 260
Sayfa: 106706

5

P-137: A Highly Sensitive Resistive Pressure Sensor with MWCNT Nanoparticles-Liquid Crystal-PDMS Composite

Dergi Makalesi

Kaynak :

Wiley Online Library

Dergi:

SID Symposium Digest of Technical Papers

Yazar(lar) :

YiCheng Yang , ShiYu Liu , Jin Pan , JianGang Lu

Yıl :

2018

YiCheng Yang

Özet Ek Bilgiler

Kaydet

A highly sensitive flexible resistive pressure sensor was demonstrated with a composite film comprising of low‐polarity liquid crystal, multi‐walled carbon nanotubes, and PDMS elastomer. LC droplets embedded in PDMS elastomer reduces the Young's modulus of the active layer. Optimizing, the sensor offers potential for wearable devices and electronic skins.

DOI : 10.1002/sdtp.12320

ISSN: 0097-966X
Sayı: 1
Cilt: 49
Sayfa: 1913-1916

6

Study on Residual Stress Releasing of 316L Stainless Steel Welded Joints by Ultrasonic Impact Treatment

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

International Journal of Steel Structures

Yazar(lar) :

Xiaodong Hu , Chongbin Ma , Yicheng Yang , Qingliang Zeng

Konu :

Civil and Structural Engineering

Yıl :

2020

Yicheng Yang

Özet Ek Bilgiler

Kaydet

In this paper, the effect of ultrasonic impact treatment (UIT) on the residual stress of 316L welded butt-joint was investigated. Firstly, the temperature field distribution in the welded joint was simulated based on the double-ellipsoidal heat source model, and the residual stresses were calculated by a sequential coupling thermo-mechanical finite element method. Subsequently, based on the theory of transient contact mechanics, the effects of UIT on releasing of the welding residual stress was analyzed. The microstructure of the weld metal before and after the UIT treatment was compared to study the influence of UIT. The results show that the maximum residual stresses in the weld metal and heat affected zones are released due to the dislocation multiplication during the UIT, and this effect on the weld metal is more remarkable than that on the heat affected zones. The results of numerical simulation of UIT are consistent with the corresponding experimental results. After UIT, the transverse and longitudinal tensile stresses near the fusion line are changed to compressive stresses.

DOI : 10.1007/s13296-020-00338-0

Anahtar Kelimeler : Welded joint, Residual stress, Microstructure analysis, Ultrasonic impact treatment, Finite element method

ISSN: 1598-2351 2093-6311
Sayı: 3
Cilt: 20
Sayfa: 1014-1025

7

P-138: A High Sensitive Resistive Pressure Sensor with NH4 HCO3 -induced Porous Structure Active Layer

Dergi Makalesi

Kaynak :

Wiley Online Library

Dergi:

SID Symposium Digest of Technical Papers

Yazar(lar) :

Jin Pan , Shiyu Liu , Yicheng Yang , Jiangang Lu

Yıl :

2018

Yicheng Yang

Özet Ek Bilgiler

Kaydet

A facile approach to achieve high sensitive piezoresistive pressure sensor is proposed. By introducing NH4HCO3 to produce porous structures in the PSR‐layer (Pressure sensor rubber), sensor shows high flexibility and elasticity. The resistance increases with external stress. Sensitivity reaches 0.8kPa‐1 under the pressure of 0–25kPa, with high linearity and stability.

DOI : 10.1002/sdtp.12328

ISSN: 0097-966X
Sayı: 1
Cilt: 49
Sayfa: 1917-1920

8

High-efficient nitrogen removal and its microbiological mechanism of a novel carbon self-sufficient constructed wetland

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Science of The Total Environment

Yayıncı:

Elsevier BV

Yazar(lar) :

Wen Jia , Yicheng Yang , Liuyan Yang , Yan Gao

Yıl :

2021

Yicheng Yang

Özet Ek Bilgiler

Kaydet

The low denitrification efficiency in constructed wetlands (CWs) was a crucial problem for treating the carbon-deficient wastewater. To further improve the N removal from the tailwater of wastewater treatment plant, the plant fermentation liquid (PFL, derived from wetland plant litter in our CWs) as a supplementary carbon source was used in horizontal subsurface-flow CW amended with Fe-modified biochar (FeB-HSCW) to increase the influent C/N ratio and drive the denitrification. The N removal performance of FeB-HSCW was investigated under various influent C/N ratios for achieving high-efficient N removal. The excellent removal rates of COD (89.35%), NO3−-N (97.48%), TN (93.76%), NH4+-N (>16%) and NO2−-N (>98%) were obtained in FeB-HSCW at the C/N of 9.0. When the large amount of PFL was added into the systems, the amount of 16S rRNA genes from bacteria and anammox bacteria, as well as of denitrification and anammox functional genes (narG, napA, nirS, nirK, qnorB, cnorB, nosZ-I, nosZ-II and hzsA) were statistically greater in FeB-HSCW than those in other two systems (C-HSCW, without biochar and FeB; B-HSCW, amended with biochar). However, the abundances of nitrification genes (amoA of AOA, amoA of AOB and nxrA) were the lowest in FeB-HSCW after adding the PFL. High-throughput analysis for 16S rRNA gene revealed that the PFL coupled with FeB remarkably optimized the structure of bacterial community. The FeB-HSCW added with sufficient PFL was enriched with the highest abundances of norank_p_Saccharibacteria, Bacillus, Geobacter, Pseudolabrys, Mizugakiibacter, Bradyrhizobium and norank_f_ Planctomycetaceae which were capable of autotrophic and/or heterotrophic denitrification as well as anammox, whereas the distribution of nitrifiers (Nitrospira) was the lowest. Overall, this work illustrated that the PFL coupled with FeB-HSCWwas a feasible and effective carbon self-sufficient HSCW for the high-efficient N removal from wastewater with low C/N ratio mainly via the autotrophic and heterotrophic denitrification and anammox.

DOI : 10.1016/j.scitotenv.2021.145901

Anahtar Kelimeler : Horizontal subsurface flow constructed wetland, Fe-modified biochar, Plant fermentation liquid, Denitrification, Anammox

ISSN: 0048-9697
Cilt: 775
Sayfa: 145901

9

The Antiviral and Antitumor Effects of Defective Interfering Particles/Genomes and Their Mechanisms

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Frontiers in Microbiology

Yazar(lar) :

Yicheng Yang , Yicheng Yang , Taibiao Lyu , Runing Zhou , Xiaoen He , Kaiyan Ye , Qian Xie , Li Zhu , Tingting Chen , Chu Shen , Qinghua Wu , Bao Zhang , Wei Zhao

Yıl :

2019

Yicheng Yang Yicheng Yang

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Defective interfering particles (DIPs), derived naturally from viral particles, are not able to replicate on their own. Several studies indicate that DIPs exert antiviral effects via multiple mechanisms. DIPs are able to activate immune responses and suppress virus replication cycles, such as competing for viral replication products, impeding the packaging, release and invasion of viruses. Other studies show that DIPs can be used as a vaccine against viral infection. Moreover, DIPs/DI genomes display antitumor effects by inducing tumor cell apoptosis and promoting dendritic cell maturation. With genetic modified techniques, it is possible to improve its safety against both viruses and tumors. In this review, a comprehensive discussion on the effects exerted by DIPs is provided. We further highlight the clinical significance of DIPs and propose that DIPs can open up a new platform for antiviral and antitumor therapies.

DOI : 10.3389/fmicb.2019.01852

Anahtar Kelimeler : defective interfering particles, defective interfering genomes, interference mechanisms, antiviral effect, antitumor effect

ISSN: 1664-302X
Cilt: 10

Sınıflandırma :

Biyotıp %100

Viroloji %97

10

Effects of metal content on electrical and physical properties in solution-processed IGZO thin films

Dergi Makalesi

Kaynak :

Springer Link

Dergi:

Applied Physics A

Yazar(lar) :

Takaaki Morimoto , Yicheng Yang , Yusuke Ochiai , Nobuko Fukuda , Yoshimichi Ohki

Konu :

General Materials Science, General Chemistry

Yıl :

2020

Yicheng Yang

Özet Ek Bilgiler

Kaydet

The on-current of indium gallium zinc oxide (IGZO) thin-film transistors (TFTs) fabricated by solution process with low-temperature post-annealing increases monotonically with the decrease in the Ga content. This trend is different from that of IGZO fabricated by a solution process, which shows the maximum electron mobility at a Ga content of 33%. To clarify its cause, effects of Ga and In contents in solution-processed IGZO post-annealed at a low-temperature on their oxygen deficiency and band structures were investigated with spectroscopic methods such as X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, photoluminescence, and ultraviolet–visible absorption. When the Ga content is low, the oxygen vacancy becomes less abundant. The increase in In content exhibits similar effects on the oxygen vacancy. We have reported that Ga is not oxidized sufficiently at low temperatures, which should cause the generation of oxygen vacancies. By this theory, the above-mentioned decrease in oxygen vacancies can be explained. Furthermore, when these films are actually used as TFT channels, the on-current increases with the decrease in Ga content. From this, in solution-processed IGZO post-annealed at a low temperature, oxygen vacancies mainly act as electron traps that decrease the on-current, rather than acting as donors. In manufacturing flexible devices, even when we decrease the process temperature low enough to suppress the damage to polymer substrates, the devices must maintain good performance. Our results suggest that an optimal metal ratio different from that of a typical vacuum process is necessary to improve the performance of IGZO TFTs fabricated by the low-temperature solution process.

DOI : 10.1007/s00339-020-03579-2

Anahtar Kelimeler : IGZO, Oxygen vacancy, TFT, X-ray photoelectron spectroscopy, Metal ratio

ISSN: 0947-8396 1432-0630
Sayı: 5
Cilt: 126

11

A Braille Reading System Based on Electrotactile Display With Flexible Electrode Array

Dergi Makalesi

Kaynak :

IEEE Xplore

Dergi:

IEEE/CAA Journal of Automatica Sinica

Yazar(lar) :

Ziliang Zhou , Yicheng Yang , Honghai Liu

Konu :

Computing and Processing, Communication, Networking and Broadcast Technologies, General Topics for Engineers, Robotics and Control Systems

Yıl :

2022

Yicheng Yang

Özet Ek Bilgiler

Kaydet

Due to visual impairment and lack of social attention, the reading problem of the blind has not been well resolved. Many existing Braille reading devices still have many problems and are not accepted by the public. This paper developed a portable Braille reading system based on electrotactile display technology. The proposed system is composed of a six-channel electrotactile stimulator, a flexible electrode array for Braille display and a graphical user interface (GUI) for monitoring and control. Based on the flexibility of the system, two Braille reading strategies have been designed: spatial mode and sequential mode. The system was preliminary tested by six sighted subjects. The results showed that subjects were able to recognize Braille characters with more than 80% accuracy within less than 10 seconds for the initial use. Compared to existing Braille reading systems, this system is portable, wearable and flexible in control.

DOI : 10.1109/jas.2022.105476

ISSN: 2329-9266 2329-9274
Sayı: 4
Cilt: 9
Sayfa: 735-737

12

Fe-modified biochar enhances microbial nitrogen removal capability of constructed wetland

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Science of The Total Environment

Yayıncı:

Elsevier

Yazar(lar) :

Wen Jia , Xu Sun , Yan Gao , Yicheng Yang , Liuyan Yang

Yıl :

2020

Yicheng Yang

Özet Ek Bilgiler

Kaydet

To improve the nitrogen removal capability of constructed wetlands, the biochar, produced from bamboo, activated with HCl and coated with Fe (FeCl3·6H2O), and then was added as a substrate into the systems. Three horizontal subsurface flow constructed wetlands (HSCWs) was established to treat the low C/N tailwater from the wastewater treatment plant: C-HSCW (quartz sand + soil), B-HSCW (quartz sand + soil + unmodified biochar), and FeB-HSCW (quartz sand + soil + Fe-modified biochar). Under different combinations of hydraulic retention time and nitrogen loading, the FeB-HSCW revealed extremely effective nitrogen removal, compared to the C-HSCW and B-HSCW. The highest removal efficiencies of NO3−-N (95.30%), TN (86.68%), NH4+-N (86.33%), NO2−-N (79.35%) and COD (63.36%) were obtained in FeB-HSCW with the hydraulic retention time of 96 h. and low influent nitrogen loading (C/N of 2.5). Nitrogen mass balance analysis showed that microbial processes played the most important role of nitrogen removal in HSCWs and the Fe-modified biochar significantly enhanced the microbial nitrogen removal. A total of 128.40 g nitrogen was removed by microorganisms in FeB-HSCW (average removal rate of 2.52 g N/(m3·d1)), much higher than that in other two HSCWs. The contributions of microorganisms, substrate storage and plant uptake on the total amount of nitrogen removal in the FeB-HSCW was 92.69%, 2.97% and 4.34%, respectively. Moreover, FeB significantly increased the abundances of genes involved in nitrogen removal. The copy numbers of bacterial 16S rRNA and amx, as well as of genes nirS, nirK, nosZ-I, nosZ-II, and hzsA were 1.3- to 27.8-fold higher in the FeB-HSCW than that in the other two HSCWs. Thus, Fe-modified biochar provides a feasible and effective amendment for constructed wetlands to improve the nitrogen removal, particularly nitrate-N, for low C/N wastewaters by enhancing the microbial nitrogen removal capacity (mainly of the denitrification).

DOI : 10.1016/j.scitotenv.2020.139534

Anahtar Kelimeler : Denitrification, Fe-modified biochar, Functional gene, Horizontal subsurface flow constructed wetland, Nitrogen

ISSN: 0048-9697
Cilt: 740
Sayfa: 139534

Sınıflandırma :

Çevre %97

Çevre %34

Su kirliliği %27

13

Research on Non-Contact Monitoring System for Human Physiological Signal and Body Movement

Dergi Makalesi

Kaynak 1:

Directory of Open Access Journals (DOAJ)

Kaynak 2:

MDPI

Dergi:

Biosensors

Yazar(lar) :

Qiancheng Liang , Lisheng Xu , Nan Bao , Lin Qi , Jingjing Shi , Yicheng Yang , Yudong Yao

Yıl :

2019

Yicheng Yang

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

With the rapid increase in the development of miniaturized sensors and embedded devices for vital signs monitoring, personal physiological signal monitoring devices are becoming popular. However, physiological monitoring devices which are worn on the body normally affect the daily activities of people. This problem can be avoided by using a non-contact measuring device like the Doppler radar system, which is more convenient, is private compared to video monitoring, infrared monitoring and other non-contact methods. Additionally real-time physiological monitoring with the Doppler radar system can also obtain signal changes caused by motion changes. As a result, the Doppler radar system not only obtains the information of respiratory and cardiac signals, but also obtains information about body movement. The relevant RF technology could eliminate some interference from body motion with a small amplitude. However, the motion recognition method can also be used to classify related body motion signals. In this paper, a vital sign and body movement monitoring system worked at 2.4 GHz was proposed. It can measure various physiological signs of the human body in a non-contact manner. The accuracy of the non-contact physiological signal monitoring system was analyzed. First, the working distance of the system was tested. Then, the algorithm of mining collective motion signal was classified, and the accuracy was 88%, which could be further improved in the system. In addition, the mean absolute error values of heart rate and respiratory rate were 0.8 beats/min and 3.5 beats/min, respectively, and the reliability of the system was verified by comparing the respiratory waveforms with the contact equipment at different distances.

Kaynak 1:

https://doi.org/10.3390/bios9020058 arayıcılığı görüntüle.
Kaynak 2:

http://dx.doi.org/10.3390/bios9020058 arayıcılığı görüntüle.

DOI : 10.3390/bios9020058

Anahtar Kelimeler : doppler bio-radar, non-contact monitoring system, body movement classify, physiological signals

ISSN: 2079-6374
Cilt: 9
Sayı: 2
Sayfa: 58

Sınıflandırma :

Bilgisayar Bilimi %44

Hesaplamalı Biyoloji ve Biyoinformatik %53

Mühendislik %41

Elektrik Mühendisliği %25

14

Parallel Fractional Hot Deck Imputation and Variance Estimation for Big Incomplete Data Curing

Dergi Makalesi

Kaynak :

IEEE Xplore

Dergi:

IEEE Transactions on Knowledge and Data Engineering

Yazar(lar) :

Yicheng Yang , Jaekwang Kim , In-Ho Cho

Konu :

Computing and Processing

Yıl :

2020

Yicheng Yang

Özet Ek Bilgiler

Kaydet

The fractional hot-deck imputation (FHDI) is a general-purpose, assumption-free imputation method for handling multivariate missing data by filling each missing item with multiple observed values without resorting to artificially created values. The corresponding R package FHDI \\cite{Im:2018} holds generality and efficiency, but it is not adequate for tackling big incomplete data due to the requirement of excessive memory and long running time. As a first step to tackle big incomplete data by leveraging the FHDI, we developed a new version of a parallel fractional hot-deck imputation (named as P-FHDI) program suitable for curing large incomplete datasets. Results show a favorable speedup when the P-FHDI is applied to big datasets with up to millions of instances or 10,000 of variables. This paper explains the detailed parallel algorithms of the P-FHDI for large instances (big-n) or high-dimensionality (big-p) datasets and confirms the favorable scalability. The proposed program inherits all the advantages of the serial FHDI and enables a parallel variance estimation, which will benefit a broad audience in science and engineering.

DOI : 10.1109/tkde.2020.3029146

Anahtar Kelimeler : Estimation, Curing, Parallel processing, Indexes, Software, Statistical learning, Parallel fractional hot-deck imputation, incomplete big data, multivariate missing data curing, parallel Jackknife variance estimation

ISSN: 1041-4347 1558-2191 2326-3865
Sayfa: 1-1

15

Prognostic factors for patients with advanced non-small cell lung cancer treated with gemcitabine-platinum as first-line therapy in an observational setting in China

Dergi Makalesi

Kaynak :

Wiley Online Library

Dergi:

Thoracic Cancer

Yazar(lar) :

Wenyu Ye , Yicheng Yang , Jin Wang , Zbigniew Kadziola , Narayan Rajan , Shukui Qin

Konu :

Oncology, Pulmonary and Respiratory Medicine, General Medicine

Yıl :

2014

Yicheng Yang

Ek Bilgiler

Kaydet

DOI : 10.1111/1759-7714.12095

ISSN: 1759-7706
Sayı: 4
Cilt: 5
Sayfa: 319-324

16

Microplastic pollution in soils and groundwater: Characteristics, analytical methods and impacts

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Chemical Engineering Journal

Yayıncı:

Elsevier BV

Yazar(lar) :

Jinsheng Huang , Hao Chen , Yulin Zheng , Yicheng Yang , Yue Zhang , Bin Gao

Yıl :

2021

Yicheng Yang

Özet Ek Bilgiler

Kaydet

Microplastic (MP) pollution has raised public concerns in recent decades globally due to its wide global spreading and potential toxicity. Most of existing studies have focused on MP pollution in marine, freshwater, and sediment systems. However, much less research attention has been paid to soil, which is a major sink of MPs. Furthermore, research interest in MPs in groundwater is even lower than that in soils. There is a critical need to digest and summarize the existing knowledge and the latest advancements to promote research on MP pollution in soils and groundwater. As the first of its kind, this work provides a systematical review of the newest knowledge on occurrences, sources, analytical methods, and impacts of MPs in both soils and groundwater. It first outlines the characteristics (global occurrences, sources, and pathways) of MP pollution in soils and groundwater. Commonly used analytical methods including sample collection (sites, tools, depth, points, and quantity), sample preparation (drying and sieving), extraction (separation, digestion, etc.), identification (visual sorting, chromatography, and vibration spectroscopy), and quality assurance/quality control are then systematically reviewed. Furthermore, the risks and impacts of MPs on soil properties, plants, animals, and antibiotic resistance genes (ARGs) between microorganisms and humans are discussed. At the end, this review also identifies the knowledge gaps and points out potential directions for future research.

DOI : 10.1016/j.cej.2021.131870

Anahtar Kelimeler : Critical review, Microplastics, Nanoplastics, Plastic pollution, Soil and groundwater quality, Analytical methods

ISSN: 1385-8947
Cilt: 425
Sayfa: 131870

17

A case with neurological abnormalities caused by Rickettsia raoultii in northwestern China

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

BMC Infectious Diseases

Yazar(lar) :

Zhihui Dong , Yicheng Yang , Qian Wang , Songsong Xie , Shanshan Zhao , Wenbo Tan , Wumei Yuan , Yuanzhi Wang

Yıl :

2019

Yicheng Yang

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Abstract Background The number of new rickettsial species are rapidly increasing, and increasing numbers of Rickettsia raoultii (R. raoultii) infection cases have been detected in humans. However, neurological abnormalities caused by R. raoultii are rarely reported, especially in northwestern China. Case presentation A 36-year-old Kazakh shepherd with an attached tick on part temporalis, presented with right eyelid droop, lethargy, fever, headache, fever (38.0–41.0 °C) and erythematous rash. The examination of cerebrospinal fluid (CSF) showed cerebrospinal pressure of 200 mm H2O, leukocyte count of 300.0 × 106/L, adenosine deaminase of 2.15 U/L, and total protein concentration of 0.93 g/L. The diagnosis of R. raoultii infection was confirmed by six genetic markers, and semi-quantified by enzyme-linked immunosorbent assay for rickettsial antigen. The patient gradually recovered after treatment with doxycycline and ceftriaxone. R. raoultii DNA was found both in a tick detached from this patient and in 0.18% (2/1107) of blood samples collected from local shepherds. Conclusions This is the first reported case with neurological abnormalities caused by R. raoultii in northwestern China. It is vital to detect rickettsial agents both in blood and CSF for tick bite patients with neurological abnormalities. Public health workers and physicians should pay attention to neurological abnormalities caused by Rickettsia.

DOI : 10.1186/s12879-019-4414-4

Anahtar Kelimeler : Rickettsia raoultii, Neurological abnormalities, Northwestern China

ISSN: 1471-2334
Cilt: 19
Sayı: 1
Sayfa: 1 - 5

Sınıflandırma :

Biyotıp %100

Tropik ilaç %66

18

Hand Grip Force Enhancer Based on sEMG- Triggered Functional Electrical Stimulation

Konferans Bildirileri

Kaynak :

IEEE Xplore

Yazar(lar) :

Jia Zeng , Yu Zhou , Yicheng Yang , Honghai Liu

Konu :

Communication, Networking and Broadcast Technologies, Components, Circuits, Devices and Systems, Computing and Processing, Robotics and Control Systems, Signal Processing and Analysis

Yıl :

2019

Yicheng Yang

Özet

Kaydet

Stroke patients in the later stages of rehabilitation are always trapped in insufficient grip output, which brings obstacles to their daily manipulations. In order to improve not only the level of grip strength but also active participation of patients, an sEMG-triggered functional electrical stimulation(FES) system was designed. In this paper, hand grip force(HGF) plays a role of bridge to connect sEMG with FES. A Morlet wavelet transform based model was used for predicting the active HGF by sEMG signals, and the complex nonlinear relationship between electrical stimulation parameters and FES-induced HGF is represented as a fitted curve defined by means of experimental measurements. Four healthy subjects participated in the experiment to validate the proposed method. Two-channel sEMG signals captured from the flexor digitorum superficialis(FDS) and extensor digitorum(ED) were used to estimate HGF. The average result revealed the proposed estimation model had a excellent performance(NRMSE <; 0.092, ). When the trigger command was generated, FES was applied to the FDS and the effect of boosting of HGF is obvious. The study demonstrated its potential for grip force recovery training or as an auxiliary device for stroke patients.

DOI : 10.1109/cyber46603.2019.9066744

Anahtar Kelimeler : Force, Electrical stimulation, Estimation, Iron, Calibration, Muscles, Wavelet transforms, biomechanics, electromyography, medical signal processing, patient rehabilitation, wavelet transforms, stroke patients, hand grip force enhancer, grip strength, FES-induced HGF, two-channel sEMG signals, extensor digitorum, grip force recovery training, flexor digitorum superficialis, sEMG-triggered functional electrical stimulation system, Morlet wavelet transform based model

19

Finger Position and Force Simultaneous Prediction Using A-mode Ultrasound

Konferans Bildirileri

Kaynak :

IEEE Xplore

Yazar(lar) :

Yu Zhou , Jia Zeng , Yicheng Yang , Honghai Liu

Konu :

Communication, Networking and Broadcast Technologies, Components, Circuits, Devices and Systems, Computing and Processing, Robotics and Control Systems, Signal Processing and Analysis

Yıl :

2019

Yicheng Yang

Özet

Kaydet

This study attempts to estimate hand finger movement and force through forearm muscle deformation for muscle-driven dexterous human-machine collaboration scenarios based on A-mode ultrasound sensing approaches. Six healthy subjects were recruited to participate in the middle finger movement experiment. The least squares support vector machine (LS-SVM) regression model and Gaussian mixture regression (GMR) model were developed to estimate hand finger movement and force for datasets captured from the flexor digitorum superficialis (FDS) muscle belly, extensor digitorum (ED) muscle belly. The average results revealed that GMR outperformed LS-SVM in simultaneous estimation for finger movement (R\n2\n=0.919, N RMSE = 9.89% for GMR and R\n2\n = 0.909, NRMSE=10.41% for LS-SVM) and finger force (R\n2\n=0.889, NRMSE = 10.34% for GMR and R\n2\n=0.865, NRMSE = 11.40% for LS-SVM). Besides, the GMR performance on finger movement estimation is better than that of finger force estimation . These results demonstrated the feasibility of finger force and joint angle simultaneous estimation based on A-mode ultrasound, demonstrating the potential for tactile driven human-machine collaborative systems applications.

DOI : 10.1109/cyber46603.2019.9066684

Anahtar Kelimeler : Force, Estimation, Ultrasonic imaging, Muscles, Robot sensing systems, Transducers, Strain, biomechanics, electromyography, Gaussian processes, human computer interaction, least squares approximations, muscle, regression analysis, support vector machines, tactile driven human-machine collaborative systems applications, flexor digitorum superficialis muscle belly, Gaussian mixture regression model, vector machine regression model, middle finger movement experiment, A-mode ultrasound sensing approaches, forearm muscle deformation, hand finger movement, force simultaneous prediction, finger position, joint angle simultaneous estimation, finger force estimation, finger movement estimation, GMR performance, LS-SVM, NRMSE

20

Numerical Simulation and Experimental Research on Temperature Distribution of Fillet Welds

Dergi Makalesi

Kaynak 1:

Directory of Open Access Journals (DOAJ)

Kaynak 2:

MDPI

Dergi:

Materials

Yazar(lar) :

Shanchao Zuo , Ziran Wang , Decheng Wang , Bing Du , Peng Cheng , Yicheng Yang , Ping Zhang , Ning Lang

Yıl :

2020

Yicheng Yang

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

In this paper, a matrix equation for the welding heat source model was proposed to calculate the fillet welds temperature distribution based on the penetration depth and molten width. A double ellipsoid heat source model of fillet weld was established firstly by physical experiment and simulation calculation, and then the orthogonal experiment was constructed based on the previous calculation methods and experimentally measured data. Finally, the matrix equation of the heat source model parameters was obtained by regression analysis based on the joint penetration and width. The experimental and numerical simulation of the temperature distribution had been performed for the fillet weld and the results show that (1) the heat flux increases in one direction, while, oppositely, it decreased in another direction; (2) simulation results were highly in accordance with experiments results. The results indicated that the double ellipsoidal heat source model calculated by the matrix equation is quite appropriate for predicting the transient temperature distribution on the fillet welds for the gas metal arc welding process.

Kaynak 1:

https://doi.org/10.3390/ma13051222 arayıcılığı görüntüle.
Kaynak 2:

http://dx.doi.org/10.3390/ma13051222 arayıcılığı görüntüle.

DOI : 10.3390/ma13051222

Anahtar Kelimeler : temperature distribution, fillet welds, double ellipsoidal heat source, sensitivity analysis, regression analysis

ISSN: 1996-1944
Cilt: 13
Sayı: 5
Sayfa: 1222

Sınıflandırma :

Malzeme Bilimi %100

Metalik Malzemeler %69

21

Posthospital Discharge Medical Care Costs and Family Burden Associated with Osteoporotic Fracture Patients in China from 2011 to 2013

Dergi Makalesi

Kaynak :

Directory of Open Access Journals (DOAJ)

Dergi:

Journal of Osteoporosis

Yazar(lar) :

Zhao Xie , Russel Burge , Yicheng Yang , Fen Du , Tie Lu , Qiang Huang , Wenyu Ye , Weihua Xu

Yıl :

2015

Yicheng Yang

Piri Tam Metin Bulucu Özet Ek Bilgiler

Kaydet

Objectives. This study collected and evaluated data on the costs of outpatient medical care and family burden associated with osteoporosis-related fracture rehabilitation following hospital discharge in China. Materials and Methods. Data were collected using a patient questionnaire from osteoporosis-related fracture patients (N = 123) who aged 50 years and older who were discharged between January 2011 and January 2013 from 3 large hospitals in China. The survey captured posthospital discharge direct medical costs, indirect medical costs, lost work time for caregivers, and patient ambulatory status. Results. Hip fracture was the most frequent fracture site (62.6%), followed by vertebral fracture (34.2%). The mean direct medical care costs per patient totaled 3,910¥, while mean indirect medical costs totaled 743¥. Lost work time for unpaid family caregivers was 16.4 days, resulting in an average lost income of 3,233¥. The average posthospital direct medical cost, indirect medical cost, and caregiver lost income associated with a fracture patient totaled 7,886¥. Patients’ ambulatory status was negatively impacted following fracture. Conclusions. Significant time and cost of care are placed on patients and caregivers during rehabilitation after discharge for osteoporotic fracture. It is important to evaluate the role and responsibility for creating the growing and inequitable burden placed on patients and caregivers following osteoporotic fracture.

DOI : 10.1155/2015/258089

Cilt: 2015

Sınıflandırma :

Tıp ve Halk Sağlığı %100

Genel Pratisyenlik ve Aile Hekimliği %93

22

Bioaccumulations and potential human health risks assessment of heavy metals in ppk-expressing transgenic rice

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Science of The Total Environment

Yayıncı:

Elsevier

Yazar(lar) :

Ruping Wei , Xin Wang , Wenli Tang , Yicheng Yang , Yan Gao , Huan Zhong , Liuyan Yang

Yıl :

2020

Yicheng Yang

Özet Ek Bilgiler

Kaydet

In order to reduce the phosphorus (P) resource consume, the polyphosphate kinase (ppk)-expressing transgenic rice (ETR) with high utilization efficiency of P fertilizer had been constructed. However, synthesis polyphosphates (polyP) mediated byppkin the plants have the ability of chelating heavy metals, so the potential hazards of the new elite rice variety have raised concerns. In the study, we planted ETR and wild-type Nipponbare (WT) in paddy fields in southern China. After harvest, the concentrations of eight heavy metals in rice tissues were measured, and health risks assessments were performed. The field experiment showed that the ppkexpressions were detected in the roots and straws of ETR plants but did not increase the concentrations of As, Cd, Cr, Ni and Pb in rice tissues. The Hg concentration in the ETRD root was 1.70-fold higher than that in WT, but the abundant Hg bioaccumulation in ETRD only occurred in the root. The bioaccumulation factors (BAFs) of all the detected heavy metals in the ETRS were no different from WT except for Cu and Zn. The results of human health risks assessment of heavy metals in brown rice showed that the non-carcinogenic risks of Cu or Zn in ETRD were higher than that in WT, while there was no difference in the total noncarcinogenic risk of the eight heavy metals in ETR. The carcinogenic risks of heavy metals in ETR were also comparable to that in WT. The results of this study indicated that the ppk expression in rice did not increase human health risks of heavy metals by consuming brown rice, which would provide a safety guarantee for agricultural and environmental applications of ETR not only with single-copy line but also with double-copy line.

DOI : 10.1016/j.scitotenv.2020.136496

Anahtar Kelimeler : Rice (Oryza sativa L.), Polyphosphate kinase, Heavy metals, Non-carcinogenic risks, Carcinogenic risks

ISSN: 0048-9697
Cilt: 710
Sayfa: 136496

Sınıflandırma :

Çevre %100

Çevresel Sağlık %80

23

Cost-effectiveness of bortezomib for multiple myeloma: a systematic review

Dergi Makalesi

Kaynak :

Dove Medical Press

Dergi:

Dove Medical Press Ltd.

Yazar(lar) :

Wendong Chen , Yicheng Yang , Yi Chen , Fen Du , Huan Zhan

Yıl :

2016

Yicheng Yang

Piri Tam Metin Bulucu Ek Bilgiler

Kaydet

DOI : 10.2147/ceor.s104195

Sınıflandırma :

Biyotıp %100

Farmakoloji ve Toksikoloji %40

Hematoloji %20

24

Experimental investigation of flow and convective heat transfer on a high-Prandtl-number fluid through the nuclear reactor pebble bed core

Dergi Makalesi

Kaynak :

Science Direct

Dergi:

Applied Thermal Engineering

Yayıncı:

Elsevier

Yazar(lar) :

Limin Liu , Dalin Zhang , Linfeng Li , Yicheng Yang , Chenglong Wang , Suizheng Qiu , G.H. Su

Yıl :

2018

Yicheng Yang

Özet Ek Bilgiler

Kaydet

For Fluoride-salt-cooled High-temperature Reactors (FHRs), a pebble bed experimental facility with internal heat generation is set up, using the Dowtherm A as the simulant fluid. Dowtherm A can match the Prandtl number of FLiBe of 520–700 °C at a low temperature range of 45–105 °C. The effects of inlet temperatures, porosity and mass flow rate are investigated on the flow and convective heat transfer characteristics. A criterion is determined for the flow regime transition from the transitional to turbulent flow. The existing correlations are unable to predict the Blake-type friction factor in the transitional flow and show mixed performance in the turbulent flow. The present empirical correlations generally underestimate the convective heat transfer coefficients of the high-Prandtl-number fluid in the pebble bed. New correlations are proposed for predicting the flow and convective heat transfer coefficients with Prandtl number at 14–19 and Reynolds number at 90–2500.

DOI : 10.1016/j.applthermaleng.2018.09.017

Anahtar Kelimeler : Experimental investigation, Pebble bed, Fluoride-salt-cooled high-temperature reactors, High-Prandtl-number fluid

ISSN: 1359-4311
Cilt: 145
Sayfa: 48-57

Sınıflandırma :

Enerji %100

Enerji Verimliliği %94

25

An Enhanced FingerVision for Contact Spatial Surface Sensing

Dergi Makalesi

Kaynak :

IEEE Xplore

Dergi:

IEEE Sensors Journal

Yazar(lar) :

Yicheng Yang , Xiaoxin Wang , Ziliang Zhou , Jia Zeng , Honghai Liu

Konu :

Signal Processing and Analysis, Communication, Networking and Broadcast Technologies, Components, Circuits, Devices and Systems, Robotics and Control Systems

Yıl :

2021

Yicheng Yang