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Search Results: 1 - 10 of 81627 matches for " Xiao-hui Sun "
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External Chinese medical therapy for pain associated with hyperplastic disease of the breast: study protocol of a randomized, double-blind, multicenter, controlled trial
Xiao-hui Sun
Zhong Xi Yi Jie He Xue Bao , 2012,
Xiao-Hui Wang,Li-Mei Sun
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811051804
Abstract: In the title compound, [Co(C7H4FO2)2(C12H8N2)(H2O)], the CoII ion is coordinated by two O atoms from one 3-fluorobenzoate (fb) ligand and one O atom from another fb ligand, two N atoms from the 1,10-phenanthroline ligand and a water molecule in a distorted octahedral geometry. An intramolecular O—H...O hydrogen bond occurs. Intermolecular O—H...O hydrogen bonds link pairs of molecules into centrosymmetric dimers. Weak intermolecular C—H...O and C—H...F hydrogen bonds and π–π interactions between the aromatic rings [shortest centroid–centroid distance = 3.4962 (2) ] further stabilize the crystal packing.
MHD Control of Oblique Detonation Waves

SUN Xiao-Hui,CHEN Zhi-Hua,ZHANG Huan-Hao,

中国物理快报 , 2011,
Web caching system based on DHT architecture

LIU Jian,SUN Xiao-hui,NI Hong,

计算机应用研究 , 2008,
Abstract: This paper proposed a Web caching plan based on DHT,whose underlying ideology was that all the terminals in an Intranet were able to share their local caching to constitute a large-scale,effective distributed Web caching system.Given the responding rapidly characteristic of Web caching,proposed a new routing scheme with a constant O(2) hop per lookup request,with which a Web query request could reach the target node within only one transfer.Furthermore,the evaluation results prove that it achieves a satisfied performance in routing reliability,hits-ratio,latency of response and caching cost.
catena-Poly[[[diaqua(1,3-benzimidazole-κN3)manganese(II)]-μ-benzene-1,3-dicarboxylato-κ3O1,O1′:O3] dihydrate]
Xiao-Hui Wang
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811008555
Abstract: In the polymeric title complex, {[Mn(C8H4O4)(C7H6N2)(H2O)2]·2H2O}n, the MnII cation is coordinated by two benzenedicarboxylate anions, one benzimidazole ligand and two water molecules in a distorted MnNO5 octahedral geometry. In the crystal, each benzenedicarboxylate anion bridges adjacent MnII cations through the terminal carboxylate groups, forming a polymeric complex chain along the a axis. One Mn—Ocarboxylate bond is much longer than the others. In the crystal, π–π stacking is observed between nearly parallel [dihedral angle = 4.32 (6)°] benzimidazole aromatic ring systems of adjacent molecules, the centroid–centroid distance between the imidazole and benzene rings being 3.5421 (11) . Extensive intermolecular O—H...O and N—H...O hydrogen bonding is present in the crystal structure. The two lattice water molecules are located on twofold rotation axes.
Analysis of Teacher Talk on the Basis of Relevance Theory
Xiao-hui XU
Canadian Social Science , 2010,
Abstract: Teacher talk is usually viewed as one of the decisive factors of success or failure in classroom teaching. Based on the basic principles of Relevance Theory, the present thesis has focused on the teacher-student interaction in form of question-answer in language classrooms and tried to analyze teacher talk under the framework of Relevance Theory to prove that Relevance Theory is able to provide an explanation for teacher talk. This thesis proposes some pedagogical implications for successful teacher talk and teacher-student interaction in EFL context. Keywords: teacher talk; teacher-student interaction; Relevance Theory Résumé: Le discours de l'enseignant est généralement considéré comme l'un des facteurs décisifs de succès ou d'échec dans l'enseignement en classe. Basée sur des principes élémentaires de théorie de la pertinence, la présente thèse a mis l'accent sur l'interaction enseignant-élève sous forme de question-réponse dans les cours de langue et tenté d'analyser les discours de l'enseignant dans le cadre de la théorie de la pertinence afin de prouver que la théorie de la pertinence est capable de fournir une explication pour le discours de l'enseignant. Cette thèse propose quelques implications pédagogiques pour les discours de l'enseignant et de l'interaction enseignant-élève réussis dans le contexte de EFL. Mots-clés: discours de l'enseignant; interaction enseignant-élève; théorie de la pertinence
X-ray plateaus followed by sharp drops in GRBs 060413, 060522, 060607A and 080330: Further evidences for central engine afterglow from Gamma-ray Bursts
Xiao-Hui Zhang
Physics , 2013, DOI: 10.1088/1674-4527/9/2/010
Abstract: The X-ray afterglows of GRBs 060413, 060522, 060607A and 080330 are characterized by plateaus that are followed by very sharp drops. An X-ray plateau is interpretable within the framework of the external forward shock model but the sharp drop is not. In this work we interpret these peculiar X-ray afterglow data as the central engine afterglows from some magnetized central engines, plausibly magnetars. In this model, the X-ray afterglows are powered by the internal magnetic energy dissipation and the sudden drop is caused by the collapse of the magnetar. Accordingly, the X-ray plateau photons should have a high linear polarization, which can be tested by the future X-ray polarimetry.
Nonlinear observer design for permanent magnet synchronous motor and verification of the algorithm kernel

ZHU Xiao-hui,LI Ying-hui,SUN Guo-qiang,

控制理论与应用 , 2012,
Abstract: 永磁同步电机调速系统的矢量控制建立在转子磁链定向系内,为了获得优异的转速响应特性、调速范围,特别是低速调速性能及抗负载扰动性能等控制效果,需要获取转子精确的位置及速度信息作为反馈调节量.针对永磁同步电机模型方程多变量、非线性、强耦合的特点,设计了一种基于非线性坐标变换后能观测规范形的高增益观测器,将其作为转子位置及速度高精度估计的内核算法.基于微分几何理论分析了转子磁链定向系内模型的非线性局部弱能观性及全局能观性,从而肯定了应用非线性观测器内核进行局部及全局状态估计的必要性;与另一种不同内核的观测器相比较,数值仿真结果肯定了本文提出的非线性观测器内核在估计转子磁链定向系的交(直)轴电流及速度信息方面的可实现性.这样,在理论及算法两个方面,都证明了所提出的非线性观测器内核可以实现无传感器稳定起动、状态估计以及结合位置估算的算法交联收敛性.
The Research of KRG Serotyping and ERIC-PCR and PCR-RFLP Genotyping of Haemophilus parasuis Isolates from Anhui Province of China
Xin Wei,Wei Jian-Zhong,Huang Xiao-Hui,Yin Zong-Jun,Sun Pei,Li Yu
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.2669.2674
Abstract: To investigate the characteristics of serology and molecular epidemiology of Haemophilus parasuis in Anhui area, this research adopts KRG serotyping and ERIC-PCR and PCR-RFLP genotyping to conduct systematic analyses on 18 HPS isolates from Anhui. The result shows that 55.6% bacterial strains can be serotyped where the most prevalent serotype is type 4 (27.78%) followed by type 14 (16.67%) and type 13 (11.11%). About 44.4% bacterial strains cannot be serotyped. With ERIC-PCR analyses, 18 HPS isolates contain 4-9 bands with the size ranging from 100-2000 bp and they belong to 11 different genotypes where IV is the dominant genotype (27.78%) followed by type 2 (16.67%) and type 1 (11.11%). With PCR-RFLP analyses, 18 HPS isolates lie in 6 different genotypes where the most prevalent genotype in Anhui area is DBP (44.4%) followed by BAE (22.22%) and BBB (16.67%). The result revels that HPS prevails in pigs in Anhui area and both its serotypes and genotypes are in polymorphism distribution. The result also shows that KRG serotypes, ERIC-PCR genotypes and PCR-RFLP genotypes of HPS are not significantly associated with each other but ERIC-PCR genotype is associated with the sources of bacterial strains with the same serotype. Compared with PCR-RFLP, ERIC-PCR better uncovers the genetic relationships of bacterial strains and hence reveals the genetic distance among different bacterial strains which can be especially applied to the inter-pig and inter-farm epidemic conditions of pathogenium.
Subspace iteration method based on practice of deflation technique and its application in spectral estimation

SUN Qi,ZHAO Xiao-hui,ZHANG Zhi-xian,

计算机应用研究 , 2012,
Abstract: This paper presented a new iterative algorithm for eigenvector estimation based on subspace iteration method and utilization of deflation technique. Compared to current eigenvector calculation methods such as SVD, the proposed algorithm can effectively reduce calculation burden and complexity with high estimation accuracy, and it was easily implemented on time. The algorithm could attaint the higher accuracy eigenvector estimation solution of autocorrelation sequences. Its estimation effectiveness is illustrated by computer simulation. Spectrum estimation used the proposed algorithm is slightly higher accuracy and less calculation, than the MUSIC spectrum estimation algorithm applied by computer simulation, which proves the effectiveness and advantage of the algorithm.
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