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Search Results: 1 - 10 of 131670 matches for " WANG Hai-chuan "
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(Z)-1,4-Diphenylbut-1-en-3-ynyl acetate
Zheng-Wang Chen,Hai-Chuan Chen,Dong-Nai Ye,Qiao-Sheng Hu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812037439
Abstract: The title compound, C18H14O2, is almost planar with a dihedral angle of 1.24 (2)° between the phenylethynyl and styryl groups. The acetoxy group is tilted by 82.46 (2) and 82.26 (3)° with respect to the benzene ring planes.
Reliability modeling research of component software architecture based on unascertained set and Bayesian net

WANG Tao,YANG Juan,CHENG Hai-chuan,LI Bo,

计算机应用 , 2009,
Abstract: Unascertained set theory and Bayesian net were applied to the study of military information system software reliability modeling. They were used to describe component failure characteristics and get component reliability parameters. Finally, a reliability model of military information system software based on unascertained set theory and Bayesian Net was proposed. The reliability was tracked and monitored during the entire process of component software system by this model. Simulation experiments prove the practicability and validity of this model.
Study on Anomalous Propagation Characteristics of Electromagnetic Waves in Evaporation Duct Environments and its Application

Huang Xiao-mao,Zhang Yong-gang,Wang Hua,Tang Hai-chuan,
,张永刚,王 华,唐海川

电子与信息学报 , 2006,
Abstract: Evaporation duct is a kind of typical anomalous profile of atmospheric refractivity, it can partly trap electromagnetic waves, as a result, the propagation characteristics are changed, which may be applied in electronic equipments such as radar, communication and ECM, etc. The purpose of this article is to study on anomalous characteristics of electromagnetic waves in evaporation duct environment through simulation methods based on electromagnetic waves propagation parabolic numerical equation and split-step Fourier algorithm technology. The experimental data of radar abnormal detection in Dalian Sea Area in October of 2003 is analyzed as an example of application to validate the abnormal characteristics of the electromagnetic waves and the anomalous detection of radar influenced by evaporation ducts.
Corrosion Behavior of ZrO2(f)-NiFe2O4 Inert Anode in Cryolite Molten Salt

HUA Zhong-sheng,YAO Guang-chun,LONG Xiu-li,WANG Hai-chuan,HAN Zhao,XIAO Sai-jun,

过程工程学报 , 2012,
Abstract: NiFe2O4 spinel was synthesized via solid-state sintering technology using NiO and Fe2O3 as raw materials,and ZrO2(f)-NiFe2O4 inert anode was prepared by adding ZrO2 fibers ZrO2(f)] into NiFe2O4.The static thermal corrosion rate and electrolytic corrosion rate of inert anode samples in cryolite molten salt were measured by weight-loss method,and their corrosion mechanism was examined by SEM,EDX and XRD analysis.The experimental results indicate that the porosity of anode samples is increased from 4.9% to 5.8% with the increase of ZrO2(f) from 0 to 4%(ω),which leads to the increase of static thermal corrosion rate from 3.8 to 4.3 mg/(cm2·h).The dissolution reactions of oxides in cryolite molten salt are inhibited in the electric field.The electrolytic corrosion rate of anodes samples containing 3%(ω) ZrO2(f) is 2.2 mg/(cm2·h),which is much lower than its static thermal corrosion rate,and both corrosions are controlled by physicochemical dissolution.ZrO2(f) has excellent stability in cryolite molten salt at high temperature,and can be used for the reinforcement of NiFe2O4 based inert anodes in aluminum electrolysis.
Effect of Pulsed Electric Field on Solidification Process of Fe-C-P System Alloy

HONG Peng,WANG Hai-chuan,LI Xin,LI Jie,LIAO Zhi-you,QIAN Zhang-xiu,

过程工程学报 , 2011,
Abstract: 在Fe-C-P系合金熔体的凝固过程中加入脉冲电场能有效减轻晶界偏聚,改善凝固组织,同时也引起了元素的迁移和重新分布,C元素与P元素呈现出相似的迁移规律,随着电压的增加,P元素偏析标准偏差从1.67降到1.26,C元素也由1.03降到0.65. 处理后的熔体凝固组织中夹杂物主要分布在中心区域,凝固组织中未观察到含磷夹杂物,存在少量MnS和Al2O3夹杂物.
Short-term Market Reaction after Trading Halts in Chinese Stock Market
Hai-Chuan Xu,Wei Zhang,Yi-Fang Liu
Quantitative Finance , 2013, DOI: 10.1016/j.physa.2014.01.044
Abstract: In this paper, we study the dynamics of absolute return, trading volume and bid-ask spread after the trading halts using high-frequency data from the Shanghai Stock Exchange. We deal with all three types of trading halts, namely intraday halts, one-day halts and inter-day halts, of 203 stocks in Shanghai Stock Exchange from August 2009 to August 2011. We find that absolute return, trading volume, and in case of bid-ask spread around intraday halts share the same pattern with a sharp peak and a power law relaxation after that. While for different types of trading halts, the peaks' height and the relaxation exponents are different. From the perspective of halt reasons or halt duration, the relaxation exponents of absolute return after inter-day halts are larger than that after intraday halts and one-day halts, which implies that inter-day halts are most effective. From the perspective of price trends, the relaxation exponents of excess absolute return and excess volume for positive events are larger than that for negative events in case of intraday halts and one-day halts, implying that positive events are more effective than negative events for intraday halts and one-day halts. In contrast, negative events are more effective than positive events for inter-day halts.
Polymorphisms in the ERCC5 Gene and Risk of Esophageal Squamous Cell Carcinoma (ESCC) in Eastern Chinese Populations
Mei-Ling Zhu, Ting-Yan Shi, Hai-Chuan Hu, Jing He, Mengyun Wang, Li Jin, Ya-Jun Yang, Jiu-Cun Wang, Meng-Hong Sun, Huan Chen, Kuai-Le Zhao, Zhen Zhang, Hai-Quan Chen, Jia-Qing Xiang, Qing-Yi Wei
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0041500
Abstract: Background Excision repair cross complementing group 5 (ERCC5 or XPG) plays an important role in regulating DNA excision repair; its functional single nucleotide polymorphisms (SNPs) may alter DNA repair capacity and thus contribute to cancer risk. Methodology/Principal Findings In a hospital-based case-control study of 1115 esophageal squamous cell carcinoma (ESCC) cases and 1117 cancer-free controls, we genotyped three potentially functional SNPs of ERCC5 (SNPs, rs2296147T>C, rs2094258C>T and rs873601G>A) and estimated crude and adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for their associations with risk of ESCC using unconditional logistic regression models. We also calculated false-positive report probabilities (FPRPs) for significant findings. We found that compared with the TT genotype, ERCC5 rs2296147 C variant genotypes were associated with a significantly lower ESCC risk (CT: adjusted OR = 0.76, 95% CI = 0.63–0.93, CT/CC: adjusted OR = 0.80, 95% CI = 0.67–0.96); however, this risk was not observed for the other two SNPs (rs2094258C>T and rs873601 G>A), nor in further stratification and haplotype analysis. Conclusions/Significances These findings suggested that ERCC5 polymorphisms may contribute to risk of ESCC in Eastern Chinese populations, but the effect was weak and needs further validation by larger population-based case-control studies.
Study of Low Dose SIMOX Wafer

CHEN Meng,CHEN Jing,ZHENG Wang,LI Lin,MOU Hai-chuan,LIN Zi-xin,YU Yue-hui,WANG Xi,

半导体学报 , 2001,
Abstract: The structure of low dose SIMOX wafers is characterized by SIMIS,XTEM,HRTEM and Secco.The results indicate that low dose S IMOX wafers have good superficial silicon layer with low threading dislocation d ensity,uniform BOX with low silicon island density and a sharp Si/SiO 2 interf ace.It suggests that the low dose is one of the most promising SIMOX synthesis t echnologies.
Genetic polymorphism of Nramp1 gene and correlation with mastitis in Holstein cattle

HU Hai-Chuan,WANG Hong-Mei,LI Jian-Bin,WANG Chang-Fa,LAI Song-Jia,LI Qiu-Ling,ZHONG Ji-Feng,

遗传 , 2009,
Abstract: In this research, PCR-SSCP technique was used to analyze the polymorphisms of the exon 11 of Nramp1 gene in Chinese Holstein cattle (n=344), and correlation between polymorphisms of Nramp1 with somatic cell score (SCS) and milk production traits was analyzed. The results show that three genotypes namely AA, BB, and AB were detected. Allele A was predominant and the frequencies of alleles A and B were estimated to be 0.767 and 0.233, respectively. Chi-square test indicated that the polymorphic locus in Chinese Holstein fitted Hardy-Weinberg equilibrium (P>0.05). Sequencing analysis showed two polymorphic sites at positions 200 bp (C/G) and 254 bp (T/G), which resulted in amino acid alteration Ala356Pro and Leu374Met. The least squares means of SCS in Holstein cattle was lower for genotype AA than that for genotypes AB and BB (P<0.05). The least squares means of milk yield of genotype AA and AB were higher than that for genotype BB (P<0.05, P<0.01, respectively). Genotype AA was beneficial to mastitis resistance. This suggested that Nramp1 may be a candidate gene responsible for mastitis in Holstein cattle.
Effect of atmosphere turbulence on phase modulation signals in coherent beam combination with multi-dithering technique

MaYan-Xing,Wang Xiao-Lin,Zhou Pu,Ma Hao-Tong,Zhao Hai-Chuan,Xu Xiao-Jun,Si Lei,Liu Ze-Jin,Zhao Yi-Jun,

物理学报 , 2011,
Abstract: The effect of atmosphere turbulence on phase modulation signal in coherent beam combination with multi-dithering technique is studied. Analytical formulas for the phase modulation signal of beam array propagating in a turbulent atmosphere are derived based on extended Huygens-Fresnel integral. Then the effects of propagation distance, turbulence intensity, filling factor and size of beam array on phase modulation signal are numerically calculated. The results show that with transmission distance increasing, there occurs a maximum of the amplitude of phase modulation signals. With the intensity of atmosphere turbulence increasing, the maximum of amplitude of phase modulation signals will appear in a shorter distance. When fill factor does not change, the distance between the laser source and the maximum of amplitude of phase modulation signals will be increased with of the dimension of laser beam increasing. When the dimension of laser beam does not change, the distance between the laser source and the maximum of amplitude of phase modulation signals will be increased with fill factor decreasing. Finally, the effects of parallel beam array and conformal focused beam array on phase modulation signal are compared, finding that the distance between the laser source and the maximum of amplitude of phase modulation signals can be changed by changing the focusing distance of conformal focused beam array.
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