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Search Results: 1 - 10 of 66235 matches for " SUN Xue-wen "
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Advanced Signal Processing Techniques for Bioinformatics
Chen Xue-Wen,Kim Sun,Pavlovi? Vladimir,Casasent David P
EURASIP Journal on Advances in Signal Processing , 2006,
Dichlorido{2-[3-(dimethylammonio)propyliminomethyl]phenolato}zinc(II) hemihydrate
Xue-Wen Zhu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808033977
Abstract: The title complex, [ZnCl2(C12H18N2O)]·0.5H2O, is a mononuclear zinc(II) compound derived from the zwitterionic form of the Schiff base 2-[3-(dimethylamino)propyliminomethyl]phenol. The ZnII atom is four-coordinated by the imine N and the phenolate O atoms of the Schiff base ligand, and by two chloride ions, in a distorted tetrahedral coordination geometry. The dimethylammonio group is disordered over two positions with site occupancies of 0.51 (3) and 0.49 (3). In the asymmetric unit, there is also a disordered water molecule with a partial occupancy of 0.5. In the crystal structure, the water molecules are linked to the Schiff base complex molecules through intermolecular N—H...O hydrogen bonds. Molecules are further linked through additional intermolecular N—H...O hydrogen bonds, forming chains running along the b axis.
Turbulence induced additional deceleration in relativistic shock wave propagation: implications for gamma-ray burst
Xue-Wen Liu
Physics , 2012, DOI: 10.1007/s10509-012-1160-0
Abstract: The late afterglow of gamma-ray burst is believed to be due to progressive deceleration of the forward shock wave driven by the gamma-ray burst ejecta propagating in the interstellar medium. We study the dynamic effect of interstellar turbulence on shock wave propagation. It is shown that the shock wave decelerates more quickly than previously assumed without the turbulence. As an observational consequence, an earlier jet break will appear in the light curve of the forward shock wave. The scatter of the jet-corrected energy release for gamma-ray burst, inferred from the jet-break, may be partly due to the physical uncertainties in the turbulence/shock wave interaction. This uncertainties also exist in two shell collisions in the well-known internal shock model proposed for gamma-ray burst prompt emission. The large scatters of known luminosity relations of gamma-ray burst may be intrinsic and thus gamma-ray burst is not a good standard candle. We also discuss the other implications.
Anniversary Distribution of Zooplankton Species Diversity in Taolinkou Reservoir

LIU Yan-fang,WU Zhen-hai,SUN Xue-wen,

水生态学杂志 , 2009,
Embedded terminal multi-application network resources distribution protocol

JIANG Yan,ZENG Xue-wen,SUN Peng,ZHU Xiao-yong,
姜 艳
,曾学文,孙 鹏,朱小勇

计算机应用研究 , 2013,
Abstract: In order to allocate network bandwidth resources rationally among multiple applications in an embedded terminal, this paper proposed an embedded terminal multi-application network resources distribution protocol. This protocol characterized network packets according to which application they belong to. And it combined with the available bandwidth of the terminal to add different delay time to each packet depending on its type. It applied this protocol to an IP STB running a HTTP streaming application and a FTP download application at the same time, and the front application HTTP stream played fluently. The experiment results show this protocol meets the network bandwidth request of the application highly concerned by users although multiple applications request for bandwidth at the same time, and achieves rational allocation of network resources in the embedded terminal.
Kernel-based distance metric learning for microarray data classification
Huilin Xiong, Xue-wen Chen
BMC Bioinformatics , 2006, DOI: 10.1186/1471-2105-7-299
Abstract: In this paper, we present a modified K-nearest-neighbor (KNN) scheme, which is based on learning an adaptive distance metric in the data space, for cancer classification using microarray data. The distance metric, derived from the procedure of a data-dependent kernel optimization, can substantially increase the class separability of the data and, consequently, lead to a significant improvement in the performance of the KNN classifier. Intensive experiments show that the performance of the proposed kernel-based KNN scheme is competitive to those of some sophisticated classifiers such as support vector machines (SVMs) and the uncorrelated linear discriminant analysis (ULDA) in classifying the gene expression data.A novel distance metric is developed and incorporated into the KNN scheme for cancer classification. This metric can substantially increase the class separability of the data in the feature space and, hence, lead to a significant improvement in the performance of the KNN classifier.DNA microarray technology is designed to measure the expression levels of tens of thousands of genes simultaneously. As an important application of this novel technology, the gene expression data are used to determine and predict the state of tissue samples, which has shown to be very helpful in clinical oncology. The most fundamental task using gene expression data in clinical oncology is to classify tissue samples according to their gene expression levels. In combination with pattern classification techniques, gene expression data can provide more reliable means to diagnose and predict various types of cancers than the traditional clinical methods.Compared with traditional pattern classifications, gene expression-based data classification is typically characterized by high dimensionality and small sample size, which make the task quite challenging. In the literature, a number of methods have been applied or developed to classify microarray data [1-6]. These methods include K-near
A New Time Series Forecasting Model

XIA Xue-wen,

系统工程理论与实践 , 2000,
Abstract: In this paper, by using the grey system theory and time series analysis, the grey time series model is put forward and model\|building method and forecasting method are abaktsed. It is applied in agriculture with total output value, the method is very good by forecasting test.
Determination of Nutrient Constituents in Seeds of Elaeagnus lanceolata

Mao Xue-wen,

植物学报 , 1997,
A Problem Worth to Discuss - Asexual Reproduction and Vegetative Propagation of Plant

Mao Xue-wen,

植物学报 , 1992,

ZHU Xue-wen,

地球学报 , 1987,
Abstract: 在系统对比分析目前各种“灰岩洞穴沉积分类”方案的基础上,本文以洞穴次生化学沉积作用及其生成形态的系统观思想为基本原则,初步提出一个包气带洞穴水运动、沉积模式及形态系统表,将洞穴次生化学沉积分为非重力水沉积、重力水沉积及其复合水运动形成的沉积三种类型。并对其中的石盾与穴帐、月奶石、石花、莲花盆、晶锥、棕榈石笋及乳房状钟乳等的形态特征及形成过程作了描述和说明。
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