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983 results on '"Wang, Jian-Wei"'

210. Theoretical gain of strained GeSn0.02/Ge1-x-y′SixSny′ quantum well laser.

Author

Zhu, Yuan-Hui, Xu, Qiang, Fan, Wei-Jun, and Wang, Jian-Wei

Subjects
PHYSICS research, SEMICONDUCTOR industry, QUANTUM wells, ENERGY-band theory of solids, ELECTRIC conductivity, ELECTRONIC structure, FREE electron theory of metals, PARTICLES (Nuclear physics)
Abstract

Using effective-mass Hamiltonian model of semiconductors quantum well structures, we investigate the electronic structures of the Γ-conduction and L-conduction subbands of GeSn/GeSiSn strained quantum well structure with an arbitrary composition. Our theoretical model suggests that the band structure could be widely modified to be type I, negative-gap or indirect-gap type II quantum well by changing the mole fraction of α-Sn and Si in the well and barrier layers, respectively. The optical gain spectrum in the type I quantum well system is calculated, taking into account the electrons leakage from the Γ-valley to L-valley of the conduction band. We found that by increasing the mole fraction of α-Sn in the barrier layer and not in the well layer, an increase in the tensile strain effect can significantly enhance the transition probability, and a decrease in Si composition in the barrier layer, which lowers the band edge of Γ-conduction subbands, also comes to a larger optical gain. [ABSTRACT FROM AUTHOR]

Published
2010
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216. Comparative studies of irradiation effects in borosilicate glass and fused silica irradiated by energetic Xe ions

Author

Yuan Wei, Zhang Bing-Tao, Sun Meng-Li, Wang Peng, Peng Hai-Bo, Liu Feng-Fei, Du Xin, Wang Tie-Shan, Zhang Xiao-Yang, and Wang Jian-wei

Subjects
Materials science, Borosilicate glass, Radiochemistry, General Physics and Astronomy, Irradiation, Ion
Abstract

As the first safety barrier of high level radioactive waste, the tolerance to radiation of vitrification is critical. Vitrification is a kind of specialized glass used as the package of high-level radioactive waste in nuclear power industry. Because of its structural consistency with the main structure of vitrification (silicon-oxygen tetrahedron), fused silica is used to study the irradiation effect on network of vitrification in the present study. Borosilicate glass, a simplified version of vitrification, is studied under the same conditions for comparison. Hardness values, moduli and refractive indexes of fused silica and borosilicate glass are measured before and after irradiation with nanoindentation technology and elliptic polarization instrument. It is shown in this study that the hardness values of fused silica and borosilicate glass decrease with increasing dose. On the other hand, with dose increasing, the modulus of borosilicate glass decreases but the modulus of silica increases. Change in modulus might be attributed to the change of density, which is consistent with results from the refractive index.

Published
2018

217. Distortion Measurement and Calibration Technique Based on Phase Analysis for Carrier-fringe Pattern

Author

杨初平 Yang Chuping, 翁嘉文 Weng Jiawen, and 王健伟 Wang Jian-wei

Subjects
Physics, Optics, Distribution (mathematics), Fringe pattern, business.industry, Distortion (optics), Phase (waves), Calibration, Phase analysis, business, Measure (mathematics), Atomic and Molecular Physics, and Optics, Image (mathematics)
Abstract

In order to measure and correct a distorted image,a vertical Ronchi carrier-fringe pattern is used as measuring template,and a distorted grating pattern is captured by the imaging system.Fourier transform method is adopted to analyze the spectrum of the distorted fringe pattern,and the fundamental spectrum is extracted by filtering.An ideal image is obtained from the central region of the distorted image,where there is no distortion,and the unwrapped phase distribution and radial wrapped phase distribution are obtained by fringe analysis.The radial phase distribution is converted to the radial distortion distribution,and the corrected image is obtained utilizing the radial distortion distribution and bilinearity interpolation.The experiment results show that the method is valid.

Published
2010

218. THE APPLICATION OF MICROSATELLITE MARKERS ON GENETIC QUALITY CONTROL OF AN INBRED STRAIN OF GOBIOCYPRIS RARUS

Author

Cao Wen-xuan, Shao Yan, Tong Jin-Gou, Wang Jian-wei, and He Yong-Feng

Subjects
Genetics, Genetic diversity, education.field_of_study, Ecology, biology, Population, Aquatic Science, biology.organism_classification, Genetic distance, Inbred strain, Gobiocypris rarus, Microsatellite, Allele, education, Inbreeding, Water Science and Technology
Abstract

Genetic homogeneity is the basic demand for an inbred strain of laboratory animal, which could be detected in multi-levels, including morphology, cytogenetics, biochemistry, immunogenetics, molecular genetics and so on. Biochemical markers and skin grafting were recommended methods for genetic quality control of mammalian animals in the national standard GB14923-2001. However, no prescriptive methods were destined for monitoring genetic quality of aquatic laboratory animals. Gobiocypris rarus is an endemic cyprinid fish in China, distributed only in Sichuan Province. Because this species has many attractive attributes, including sensitivity to chemicals, small size, eurythermal, easily to be cared in laboratory, short life cycle ( about 4 months) and so on, it has been widely used in mail),, researches of fish pathology, genetics, toxicology, embryology, and physiology in China. An inbred strain of Gobiocypris rarus, named HAN strain, has been, established by brother-sister mating to the 23rd generation in the laboratory since 1990. In order to investigate the genetic background of the HAN strain and to monitor its genetic quality, we examined the inbred strain on external morphometric and meristic characters, skeletal morphometrics, survival of scale transplantation, electropherogram of isozymes and microsatellite polymorphism. The present study was a part of these series works on the examination of molecular genetic homogeneity. A total of 17 microsatellite markers were used to analyze on 30 individuals of F22, 20 individuals of F20 of the HAN strain in contrast with 30 individuals of wild type which were caught in Hanyuan County in 2006. All the 17 microsatellite markers exhibited to be polymorphic in wild populations, yet only six of them were polymorphic in F20 and four polymorphic in F22. Overall 64 alleles were detected in the wild population, and the number of alleles per locus ranged front 2 to 6. But in HAN, only I or 2 alleles Could be detected in each locus, while totally 26 and 21 alleles were found in F20 and F22, respectively. The average homozygosities of these microsatellite loci were 91.96%, 86.18% and 46.84% in F22, F20 and wild population, respectively. The average heterozygosity was 0.5744 in wild population, significantly higher than those of F22 and F20, which showed its high levels of genetic diversity. The average polymorphism information content was 0.5252, 0.3838 and 0.3837 in wild population, F20 and F22, respectively. Therefore, in contrast to wild Population, the high homozygosity and low heterozygosity were found in inbred HAN strain. Among all populations, the genetic similarity index between F20 and F22 was the largest one, which showed the closest genetic distance and the nearest relationship between them. The genetic distance between wild population and F20 was larger than one between F20 and F22, and smaller than one between wild population and F22. On the whole, the present study indicated that genetic diversity of inbred strain was much lower than wild Population, and high genetic purity resulted front long-lime inbreeding was existed in HAN strain. Microsatellite markers were sensitive and effective methods for monitoring genetic quality of laboratory fish. The HAN strain maintained by brother-sister mating should be periodically monitored by microsatellite markers for the Unpurified loci needed to be homozygosis.

Published
2009

219. Effect Attack on Scale-Free Networks due to Cascading Failures

Author

Wang Jian-wei and Rong Li-li

Subjects
Computer science, Robustness (computer science), Scale-free network, General Physics and Astronomy, Initial load, Topology, Cascading failure
Abstract

Adopting the initial load of a node j to be Lj = [kj(Σm Γ jkm)]α with kj and Tj being the degree of the node j and the set of its neighbouring nodes respectively, we propose a cascading model based on a local preferential redistribution rule of the load after removing a node. Assuming that a failed node leads only to a redistribution of the load passing through it to its neighbouring nodes, we explore the response of scale-free networks subject to two different attack strategies on nodes and find some interesting and counterintuitive results in our cascading model. On the one hand, unexpectedly, the attack on the nodes with the lowest degree is more harmful than the attack on the highest degree nodes when α < 1/2. On the other hand, when α = 1/2, the effects of two attacks for the robustness against cascading failures are almost identical. In addition, the numerical simulations are also verified by the theoretical analysis. These results may be very helpful for real-life networks to protect the key nodes selected effectively and to avoid cascading-failure-induced disasters.

Published
2008

229. A Strategy Combining Higher Energy C-Trap Dissociation with Neutral Loss- and Product Ion-Based MSn Acquisition for Global Profiling and Structure Annotation of Fatty Acids Conjugates

Author

Bi, Qi-rui, primary, Hou, Jin-jun, additional, Yang, Min, additional, Shen, Yao, additional, Qi, Peng, additional, Feng, Rui-hong, additional, Dai, Zhuo, additional, Yan, Bing-peng, additional, Wang, Jian-wei, additional, Shi, Xiao-jian, additional, Wu, Wan-ying, additional, and Guo, De-an, additional

Published
2016
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233. CT diagnosis of pleural and stromal invasion in malignant subpleural pure ground-glass nodules: an exploratory study.

Author

Zhao, Qing, Wang, Jian-wei, Yang, Lin, Xue, Li-yan, and Lu, Wen-wen

Subjects
*COMPUTED tomography, *PLEURA, *ADENOCARCINOMA, *UNIVARIATE analysis, *LOGISTIC regression analysis
Abstract

Objectives: To assess the risk of visceral pleural invasion (VPI) and improve the diagnosis of invasive adenocarcinoma (IA) in pure ground-glass nodules (pGGNs) in contact with pleura, through a comprehensive analysis of the thin-section CT features of subpleural malignant pGGNs.Methods: CT findings and clinical information of 115 consecutive patients in our hospital between January 2012 and December 2015 who met the following criteria were retrospectively studied: (a) thin-section CT within 1 month before surgery proved pGGN in contact with pleura, and (b) the pGGN was confirmed as malignancy by surgery. Univariate analysis and a multivariate logistic regression analysis were conducted to identify the independent risk factors of IA and VPI.Results: No pleural invasion was observed microscopically in any of the pGGNs. Univariate analysis indicated that tumour shape (p = 0.004), relative density (p = 0.038) and the existence of pleural retraction (p < 0.001) were significantly different between the invasive group and pre- or minimally invasive group. Multivariate logistic regression analysis revealed that pleural retraction (OR, 5.663; p < 0.001), lobulated tumour shape (OR, 4.812; p = 0.016) and tumour relative density greater than 1.60 (OR, 4.449; p = 0.001) were independent risk factors of IA.Conclusions: Pulmonary adenocarcinoma manifesting as pGGN generally does not invade the pleura. A comprehensive consideration of tumour shape, relative density and tumour-pleural relationship can independently predict IA.Key Points: • This study showed that pGGN-like adenocarcinoma generally does not invade the pleura. • This study suggested that persistent pGGN with pleural retraction, lobulated shape and high relative density (> 1.60) may very likely be invasive adenocarcinoma. • Using "relative density" can reduce confounding of contrast agent and respiratory status in analysis of CT images. [ABSTRACT FROM AUTHOR]

Published
2019
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235. Genetic diversity of threeGobiocypris raruspopulations and one inbreeding stock

Author

Cui Ying-Song, Wang Jian-Wei, and Wang Wei

Subjects
education.field_of_study, Genetic diversity, Ecology, biology, Population, Abies fabri, education, biology.organism_classification, Inbreeding, Ecology, Evolution, Behavior and Systematics, Stock (geology), Nature and Landscape Conservation
Published
2000

236. LKB1 is a DNA damage response protein that regulates cellular sensitivity to PARP inhibitors

Author

Wang, Yi-Shu, primary, Chen, Jianfeng, additional, Cui, Fengmei, additional, Wang, Huibo, additional, Wang, Shuai, additional, Hang, Wei, additional, Zeng, Qinghua, additional, Quan, Cheng-Shi, additional, Zhai, Ying-Xian, additional, Wang, Jian-Wei, additional, Shen, Xiang-Feng, additional, Jian, Yong-Ping, additional, Zhao, Rui-Xun, additional, Werle, Kaitlin D., additional, Cui, Rutao, additional, Liang, Jiyong, additional, Li, Yu-Lin, additional, and Xu, Zhi-Xiang, additional

Published
2016
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