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Search Results: 1 - 10 of 32911 matches for " Jisheng Guo "
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2-Oxo-2,3-dihydro-1H-imidazo[1,2-a]pyridinium iodide
Jinling Miao,Jisheng Guo,Chunhua Hu,Daqi Wang
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810004976
Abstract: In the title compound, C7H7N2O+·I , the carbonyl C and O atoms of the cation and the iodide ion are situated on mirror planes. The mean plane of the imidazo[1,2-d]pyridinium cation is perpendicular to the mirror plane as a consequence of the disorder of the cation over two opposite orientations of equal occupancy. In the crystal, N—H...I interactions are present.
Relaxation from color Compton Scattering of Plasmons in A Collisionless Quark-Gluon Plasma
Xiaoping Zheng,Jisheng Chen,Jiarong Li,Lianggang Liu,Shuohong Guo
Physics , 1999,
Abstract: Non-Abelian kinetic effects are taken into account for the study of the relaxation of collective motion in a quark-gluon plasma(QGP). An explicit Compton scattering is considered to calculate the relaxation time. It is shown that the new non-Abelian relaxation has a physical mechanism from the non-linear dynamics and the meaning of the relaxation is discussed.
Linear Precoding Design for MIMO-PLC Systems
Jisheng Peng
- , 2015, DOI: 10.1109/TST.2015.7085628
Abstract: In this paper, we consider the design of linear precoding in Multiple Input Multiple Output (MIMO) Power Line Communication (PLC) systems with finite-alphabet input. First, we derive mutual information of MIMO-PLC systems with impulsive noise. Considering the non-concavity of the objective function and the low-cost requirement of PLC systems, we choose the lower bound of the mutual information as the objective function. Subsequently, we propose a novel approach to design the precoding scheme to reduce computational complexity. Specifically, our work primarily includes the following two contributions: (1) We design the right unitary matrix that is a product of two fixed unitary matrices, which only depends on the modulation mode. Hence, the results can be saved and require less computations. (2) For the power allocation matrix, we first reduce the space of power allocation using constraints of the optimal power allocation policy. Consequently, we propose a non-linear search method to obtain the optimal power allocation in small space. In regards to the computational complexity of the analysis, we conclude that the proposed precoding matrix design scheme has low complexity and is easy to implement. Moreover, the numerical results are proven to demonstrate the performance of the proposed precoding design scheme.
The Nonlinear Spatial Damping Rate in QGP
Chen Jisheng Li Jiarong
Physics , 1998, DOI: 10.1016/S0370-2693(98)00544-9
Abstract: The derivative expansion method has been used to solve the semiclassical kinetic equations of quark-gluon plasma (QGP). The nonlinear spatial damping rate, the imaginary part of the wave vector, for the longitudinal secondary color waves in the long wavelength limit has been calculated numerically.
Genome-Wide Screening for Genetic Alterations in Esophageal Cancer by aCGH Identifies 11q13 Amplification Oncogenes Associated with Nodal Metastasis
Jianming Ying, Ling Shan, Jisheng Li, Lan Zhong, Liyan Xue, Hong Zhao, Lili Li, Cordelia Langford, Lei Guo, Tian Qiu, Ning Lu, Qian Tao
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0039797
Abstract: Background Esophageal squamous cell carcinoma (ESCC) is highly prevalent in China and other Asian countries, as a major cause of cancer-related mortality. ESCC displays complex chromosomal abnormalities, including multiple structural and numerical aberrations. Chromosomal abnormalities, such as recurrent amplifications and homozygous deletions, directly contribute to tumorigenesis through altering the expression of key oncogenes and tumor suppressor genes. Methodology/Principle Findings To understand the role of genetic alterations in ESCC pathogenesis and identify critical amplification/deletion targets, we performed genome-wide 1-Mb array comparative genomic hybridization (aCGH) analysis for 10 commonly used ESCC cell lines. Recurrent chromosomal gains were frequently detected on 3q26-27, 5p15-14, 8p12, 8p22-24, 11q13, 13q21-31, 18p11 and 20q11-13, with frequent losses also found on 8p23-22, 11q22, 14q32 and 18q11-23. Gain of 11q13.3-13.4 was the most frequent alteration in ESCC. Within this region, CCND1 oncogene was identified with high level of amplification and overexpression in ESCC, while FGF19 and SHANK2 was also remarkably over-expressed. Moreover, a high concordance (91.5%) of gene amplification and protein overexpression of CCND1 was observed in primary ESCC tumors. CCND1 amplification/overexpression was also significantly correlated with the lymph node metastasis of ESCC. Conclusion These findings suggest that genomic gain of 11q13 is the major mechanism contributing to the amplification. Novel oncogenes identified within the 11q13 amplicon including FGF19 and SHANK2 may play important roles in ESCC tumorigenesis.
Chemical components of volatiles from withered black poplar leaves with different physiological age

GUO Xianru,YUAN Guohui,JIANG Jinwei,LUO Meihao,MA Jisheng,

应用生态学报 , 2005,
Abstract: By the methods of steam distillation and GC-MS,this paper analyzed the chemical components of the volatiles from withered black poplar leaves.The main components of the volatiles from young leaves were(Z)-3-hexenol(44.81%),4-methyl-1-pentanol(21.85%)and 2-hydroxy-benzaldehyde(15.19%),those from matured leaves were(Z)-3-hexenol(28.71%)and 2-hydroxy-benzaldehyde(10.35%),while in the volatiles from senescent leaves,the main components were 2-hydroxy-benzaldehyde(28.81%)and benzyl alcohol(15.06%).The(Z)-3-hexenol content in the volatiles was evidently decreased with increasing leaf age,while the species and contents of aromatic compounds were in adverse.
Ultrasonic Fractography

Sheng Jisheng,

实验力学 , 1992,
Abstract: When a high speed fracture is underway,the wallner curves will be formed if it meets an ultrasonic wave.The interval of wallner curves can be used to determine the fracture speed.This paper gives a brief introduction to the principle and experimental method of meas- uring fracture speed by ultrasonic fractography.Some examples are included.
Label-free quantification of proteomic changes in ethanol-induced hepatocyte

王小岳, 王道光, 郭继生, 李翠玲, 荆瑞瑞, 吕鑫, 陈新骏, 杨静华
WANG Xiaoyue
, WANG Daoguang, GUO Jisheng, LI Cuiling, JING Ruirui, Lü Xin, CHEN Xinjun, YANG Jinghua

- , 2015, DOI: 10.6040/j.issn.1671-7554.0.2014.766
Multiscale Time-Splitting Strategy for Multiscale Multiphysics Processes of Two-Phase Flow in Fractured Media
Jisheng Kou,Shuyu Sun,Bo Yu
Journal of Applied Mathematics , 2011, DOI: 10.1155/2011/861905
Abstract: The temporal discretization scheme is one important ingredient of efficient simulator for two-phase flow in the fractured porous media. The application of single-scale temporal scheme is restricted by the rapid changes of the pressure and saturation in the fractured system with capillarity. In this paper, we propose a multi-scale time splitting strategy to simulate multi-scale multi-physics processes of two-phase flow in fractured porous media. We use the multi-scale time schemes for both the pressure and saturation equations; that is, a large time-step size is employed for the matrix domain, along with a small time-step size being applied in the fractures. The total time interval is partitioned into four temporal levels: the first level is used for the pressure in the entire domain, the second level matching rapid changes of the pressure in the fractures, the third level treating the response gap between the pressure and the saturation, and the fourth level applied for the saturation in the fractures. This method can reduce the computational cost arisen from the implicit solution of the pressure equation. Numerical examples are provided to demonstrate the efficiency of the proposed method.
Diversity and Biosynthetic Potential of Culturable Actinomycetes Associated with Marine Sponges in the China Seas
Lijun Xi,Jisheng Ruan,Ying Huang
International Journal of Molecular Sciences , 2012, DOI: 10.3390/ijms13055917
Abstract: The diversity and secondary metabolite potential of culturable actinomycetes associated with eight different marine sponges collected from the South China Sea and the Yellow sea were investigated. A total of 327 strains were isolated and 108 representative isolates were selected for phylogenetic analysis. Ten families and 13 genera of Actinomycetales were detected, among which five genera represent first records isolated from marine sponges. Oligotrophic medium M5 (water agar) proved to be efficient for selective isolation, and “ Micromonospora– Streptomyces” was proposed as the major distribution group of sponge-associated actinomycetes from the China Seas. Ten isolates are likely to represent novel species. Sponge Hymeniacidon perleve was found to contain the highest genus diversity (seven genera) of actinomycetes. Housekeeping gene phylogenetic analyses of the isolates indicated one ubiquitous Micromonospora species, one unique Streptomyces species and one unique Verrucosispora phylogroup. Of the isolates, 27.5% displayed antimicrobial activity, and 91% contained polyketide synthase and/or nonribosomal peptide synthetase genes, indicating that these isolates had a high potential to produce secondary metabolites. The isolates from sponge Axinella sp. contained the highest presence of both antimicrobial activity and NRPS genes, while those from isolation medium DNBA showed the highest presence of antimicrobial activity and PKS I genes.
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