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Search Results: 1 - 10 of 97724 matches for " Xiao-Long Yang "
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Research On Construction Traffic Safety Measures Based On FAHP Model In Hydropower Project  [PDF]
Xiao-yan YANG, Xin-sheng XIE, Ya-ping NIU, Xiao-long ZHU, Chang-qi DENG
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.24B022
Abstract: With the rapid expansion of hydropower projects, Construction safety problem has become one of the bottlenecks for the development of hydropower industry. Combined with the construction of the diversion channel project of Guan Yinyan hydropower station, from the point of view of construction traffic safety, based on the result of the FAHP model, factors which influence the construction safety of the diversion channel project of Guan Yinyan hydropower station have been found, relative measures focuses on the approach to eliminate hazards and guarantee construction safety have been elaborated.
Linear perturbations in Eddington-inspired Born-Infeld gravity
Ke Yang,Xiao-Long Du,Yu-Xiao Liu
Physics , 2013, DOI: 10.1103/PhysRevD.88.124037
Abstract: We study the full linear perturbations of a homogeneous and isotropic spacetime in the Eddington-inspired Born-Infeld gravity. The stability of the perturbations are analyzed in the Eddington regime. We find that, for positive $\kappa$, the scalar modes are stable in the infinite wavelength limit ($k=0$) but unstable for $k\neq0$. The vector modes are stable and the tensor mode is unstable in the Eddington regime, independent of the wave vector $k$. However, these modes are unstable and hence cause the instabilities for negative $\kappa$.
New Spiral γ-Lactone Enantiomers from the Plant Endophytic Fungus Pestalotiopsis foedan
Xiao-Long Yang,Zhuang-Zhuang Li
Molecules , 2013, DOI: 10.3390/molecules18022236
Abstract: (?)-(4 S, 8 S)-Foedanolide ( 1a) and (+)-(4 R, 8 R)-foedanolide ( 1b), a pair of new spiro-γ-lactone enantiomers, were isolated from the fermentation broth of the plant endophytic fungus Pestalotiopsis foedan by HPLC using a chiral column, achieving over 7% ee. Their structures and absolute configurations were determined on the basis of extensive analysis of NMR spectra combined with computational methods via calculation of the electronic circular dichroism (ECD) and optical rotation (OR). Compounds 1a and 1b showed moderate activities against HeLa, A-549, U-251, HepG2 and MCF-7 tumor cell lines.
Restriction fragment length polymorphism in the exon 2 of the BoLA-DRB3 gene in Chinese Holstein of the south China  [PDF]
Xiu-Xiang Wu, Zhang-Ping Yang, Xiao-Long Wang, Yong-Jiang Mao, Shu-Chun Li, Xue-Kui Shi, Ying Chen
Journal of Biomedical Science and Engineering (JBiSE) , 2010, DOI: 10.4236/jbise.2010.32030
Abstract: The genetic diversity of the exon2 of BoLA-DRB3 (BoLA-DRB3.2) in Chinese Holstein cattle of the south China was investigated by hemi-nested polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique. Six, four and eleven RFLP patterns were found after digestion with the restriction enzymes Hae III, Bst YI and Rsa I, respectively. The DNA sequence showed and twenty- five DRB3.2 alleles. GLM model analysis indicated that lactation and calving season have positive correlation with SCC (Somatic Cell Count) (p<0.01), BoLA-DRB3.2*3, *8, *18 and *26 were associated with lower SCC (p<0.01). The present findings concluded that mastitis is a severe hinder of milk production and technology. Therefore, future re-searches should focus on associations of mastitis with BoLA haplotypes rather than single BoLA genes
Gravity localization and mass hierarchy in scalar-tensor branes
Ke Yang,Yu-Xiao Liu,Yuan Zhong,Xiao-Long Du,Shao-Wen Wei
Physics , 2012, DOI: 10.1103/PhysRevD.86.127502
Abstract: We consider a braneworld model in the scalar-tensor gravity. In order to solve the gauge hierarchy problem in this model, our world should be confined on the positive tension brane rather than on the negative one. This is crucial to reproduce a correct Friedmann-like equation on the brane. Interestingly, it is found that the spacing of mass spectrum in this scenario is very tiny, but the light gravitons cannot be observed individually in colliders because of their sufficiently weak interaction with matter fields on the visible brane.
Dirac dynamical resonance states around Schwarzschild black holes
Xiang-Nan Zhou,Xiao-Long Du,Ke Yang,Yu-Xiao Liu
Physics , 2013, DOI: 10.1103/PhysRevD.89.043006
Abstract: Recently, a novel kind of scalar wigs around Schwarzschild black holes---scalar dynamical resonance states were introduced in [Phys. Rev. D 84, 083008 (2011)] and [Phys. Rev. Lett. 109, 081102 (2012)]. In this paper, we investigate the existence and evolution of Dirac dynamical resonance states. First we look for stationary resonance states of a Dirac field around a Schwarzchild black hole by using the Schr\"{o}dinger-like equations reduced from the Dirac equation in Schwarzschild spacetime. Then Dirac pseudo-stationary configurations are constructed from the stationary resonance states. We use these configurations as initial data and investigate their numerical evolutions and energy decay. These dynamical solutions are the so-called "Dirac dynamical resonance states". It is found that the energy of the Dirac dynamical resonance states shows an exponential decay. The decay rate of energy is affected by the resonant frequency, the mass of Dirac field, the total angular momentum, and the spin-orbit interaction. In particular, for ultra-light Dirac field, the corresponding particles can stay around a Schwarzschild black hole for a very long time, even for cosmological time-scales.
Dihydroberkleasmin A: A New Eremophilane Sesquiterpenoid from the Fermentation Broth of the Plant Endophytic Fungus Pestalotiopsis photiniae
Xiao-Long Yang,Su Zhang,Hua-Jie Zhu,Du-Qiang Luo
Molecules , 2011, DOI: 10.3390/molecules16021910
Abstract: Dihydroberkleasmin A (1), a new ester-substituted sesquiterpenoid related to the eremophilane class, together with the known compound berkleasmin C (2), were isolated from the fermentation broth of the plant endophytic fungus Pestalotiopsis photiniae. The structure of dihydroberkleasmin A (1) was elucidated by extensive spectroscopic analysis. The stereochemistry was assigned by comparison of the NMR spectroscopic data with those of berkleasmin A.
A spatial analysis and construction of domestic tourism of "big Xi''an tourism circle"

YANG Xin-jun,MA Xiao-long,

地理研究 , 2004,
Abstract: Chinese tourist market is mainly constituted of domestic tourists. Rationalization on regional tourism organization can be reached through rational analysis on spatial structure of tourism origin. Based on the analysis of tourism market, origins on domestic tourism market of Xi'an can be divided by different provinces. By using three years' tourism statistics (1995,1998,2001), different periods of radius of tourism abstraction and index of spatial affinity are calculated with the formula of "Central Destination Standard Distance", the results are compared and the regulation of distance attenuation of domestic tourism market is summarized, the trend of diversification of tourism abstraction in Xi'an is forecasted. Meanwhile, 2000 questionnaires are sent out to investigate the visitors in 10 scenic spots. 1780 valid responses are analyzed, the behavioral characteristics of domestic tourists in choosing scenic spots around Xi'an are found out, and the mode of space selecting is put forward. Conception of big tourism circle of Xi'an is established, and the boundary of circle is ascertained. The location, the condition of resource and the standard of utilities in Xi'an is considered, and the principle of big tourism circle development is proposed. Finally, five conclusions are summarized: 1) Distribution of domestic tourism origin is dispersing gradually; 2) current domestic tourism origin of Xi'an is mainly constituted of circumjacent provinces and provinces in eastern China, this phenomenon will remain in the future; 3) domestic tourism market of Xi'an can develop persistently via regional cooperation; 4) the preference of human tourism abstraction is apparent for tourists from other provinces; and 5) integrated development of tourism in Xi'an and Xianyang is the primary step to construct the big tourism circle of Xi'an.
Fast generation of cluster states in a linear ion trap

Xu You-Yang,Zhou Fei,Zhang Xiao-Long,Feng Mang,

中国物理 B , 2010,
Abstract: We propose a practical scheme to generate cluster states by simultaneously accomplishing two-qubit conditional gating on an array of equidistant ions by using transverse modes. Our operation is robust to heating and insensitive to Lamb--Dicke parameter. Meanwhile, as it is carried out in a geometric quantum computing fashion, our scheme enables the fast and high-fidelity generation of cluster states. The experimental feasibility is discussed with sophisticated ion trap techniques.
Optimized RWA based on network coding for optical multicast trees

ZHOU Ying-fu,YANG Xiao-long,

计算机应用研究 , 2009,
Abstract: This paper proposed an algorithm of shared optical multicast tree with network coding based on the layered graph.The algorithm could release the average blocking probability and network load balancing probability.The simulation results show that the shared optical multicast tree with network coding in the use of the optical approach,the average blocking probability and network load balancing ratio is superior to shared tree. Finally, the paper summarized and also pointed out some future works.
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