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Search Results: 1 - 10 of 8481 matches for " Jixin Deng "
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The evolutionary history of Cytochrome P450 genes in four filamentous Ascomycetes
Jixin Deng, Ignazio Carbone, Ralph A Dean
BMC Evolutionary Biology , 2007, DOI: 10.1186/1471-2148-7-30
Abstract: A total of 376 P450 genes were assigned to 168 families according to standard nomenclature. On average, only 1 to 2 genes per family were in each genome. To resolve conflicting results between different clustering analyses and standard family designation, a higher order relationship was formulated. 376 genes were clustered into 115 clans. Subsequently a novel approach based on parsimony was developed to build the evolutionary models. Based on these analyses, a core of 30 distinct clans of P450s was defined. The core clans experienced contraction in all four fungal lineages while new clans expanded in all with exception of NC. MG experienced more genes and clans gains compared to the other fungi. Parsimonious analyses unanimously supported one species topology for the four fungi.The four studied fungi exhibit unprecedented diversity in their P450omes in terms of coding sequence, intron-exon structures and genome locations, suggesting a complicated evolutionary history of P450s in filamentous Ascomycetes. Clan classification and a novel strategy were developed to study evolutionary history. Contraction of core clans and expansion of novel clans were identified. The exception was the NC lineage, which exhibited pure P450 gene loss.Fungi comprise a large and diverse kingdom of organisms. It is estimated that as many as 1.5 million species exist in the planet today [1,2]. Most described fungi grow by producing long, multi-celled hyphae, and are known as filamentous fungi. Filamentous fungi occupy a wide range of ecological niches with diverse life histories and physiological processes. Many live as saprotrophs decomposing and absorbing nutrients from dead materials while others have evolved the ability to be pathogens deriving their nutrients from living or dying hosts. Taking advantage of available genome sequences to explore the evolution of important gene families may help shed light on the processes that have allowed fungi to exploit diverse habitats.The P450-contain
Realization of a Covert Communication System Over the Public Switching Telephone Network
Jixin Liu,Zheming Lu
Information Technology Journal , 2009,
Abstract: In this study, a covert communication applying the vector quantization based information hiding algorithm and the Public Switching Telephone Network (PSTN) is implemented. The system aims at offering good security of the secret binary image message and the real-time performance that is very important for the speech calling of the telephone service. Therefore, we adopt a simple and effective encryption method for the secret binary image message prior to the embedding process. The embedding position is also protected by using a secret key. By using these methods, the requirement of short-term protection in the bursting phone call communication for the secret binary image message and the real-time encryption are both fulfilled. Furthermore, an information hiding algorithm based on vector quantization is proposed and the advantage of it is discussed. We evaluate the system with the ITU-T G.729a standard speech codec in StegoPhone, which is our platform for research on covert communication technology via PSTN. The experimental results show that our method has negligible hearing effects on the conversation speech and meet the requirement of the real-time calling conversation communication via PSTN.
Multivariate saddlepoint approximations in tail probability and conditional inference
John Kolassa,Jixin Li
Statistics , 2010, DOI: 10.3150/09-BEJ237
Abstract: We extend known saddlepoint tail probability approximations to multivariate cases, including multivariate conditional cases. Our approximation applies to both continuous and lattice variables, and requires the existence of a cumulant generating function. The method is applied to some examples, including a real data set from a case-control study of endometrial cancer. The method contains less terms and is easier to implement than existing methods, while showing an accuracy comparable to those methods.
Cost Control of the Transmission Congestion Management in Electricity Systems Based on Ant Colony Algorithm  [PDF]
Bin Liu, Jixin Kang, Nan Jiang, Yuanwei Jing
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.31003
Abstract: This paper investigates the cost control problem of congestion management model in the real-time power systems. An improved optimal congestion cost model is built by introducing the congestion factor in dealing with the cases: opening the generator side and load side simultaneously. The problem of real-time congestion management is transformed to a nonlinear programming problem. While the transmission congestion is maximum, the adjustment cost is minimum based on the ant colony algorithm, and the global optimal solu-tion is obtained. Simulation results show that the improved optimal model can obviously reduce the adjust-ment cost and the designed algorithm is safe and easy to implement.
Analysis of Influence Factors of Tide-Dominated Estuaries Based on Deposition Numerical Simulation  [PDF]
Tao Tang, Jixin Huang, Yanshu Yin, Wenjie Feng
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32012
Abstract: Tide-dominated estuaries sedimentary reservoir is a hot area of sedimentology research in recent years, and the important target of oil and gas exploration is one of the relatively few sedimentary systems. Based on the study of underground reservoirs, outcrop and modern sedimentation, scholars believe that the estuary is a sedimentary system formed by transgressive system tract, which is composed of a complex subfacies environment with obvious changes. Its formation is influenced by many factors. The purpose of this paper is to simulate the deposition process of estuaries by Delft-3D software, and to reveal the main controlling factors of estuarine reservoir formation. The factors are as follows. 1) The size of the river flow has a destructive effect on the formation of the estuarine sand bar in the estuary, but the effect is small. 2) Tidal energy plays a constructive role in estuarine sand bars in estuaries, and it is also the main force for the formation of estuarine reservoirs. 3) The composition of the sediments has an obvious influence on the formation of the estuarine reservoir, and the content of the mud is an important factor for the retention of the estuarine sand bar.
Properties of Phase Transformation of Ferroelectric Thin Films with Surface Layers  [PDF]
Lian Cui, Xu Xu, JiXin Che, Zelong He, Huijie Xue, Tianquan Lv
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.29125
Abstract: Using the generalized Ginzburg-Landau-Devonshire theory, the characteristics of phase transformation of a ferroelectric thin film with surface layers are investigated. We study the effect of the surface layer on the properties (coercive field, critical thickness) of a ferroelectric thin film. Our theoretical results show that the surface layer is likely to answer for the emergence of phase transformation.

WANG Jixin,

金属学报 , 1992,
Abstract: In the light of estimation model for ternary excess properties, an approximate analytical procedure for ternary Gibbs-Duhem equation was proposed, and verification by previous ternary systems as Cd-Bi-Pb and Zn-In-Cd was also made.
Investigation of the Design Methods of Computer Network for the Henan province Water Control

Wang JiXin,

计算机系统应用 , 2005,
Abstract: 本文针对2兆电路带宽下,对数据、语音、视频同网传输的计算机网络选型方案进行了分析探讨,结合实践经验,提出了网络选型中应着重注意的事项。
沉积学报 , 1989,
Abstract: Ⅰ.INTRODUCTIONNorthChinaplatformextendsbeyondYinshanMountainsinthenorth,beyondHelanMountainsinthewest,toQilianMountains,QinlingMountains,FuniuMountainsandDabieMountainsinthesouth,andtotheseaintheeast.ItcoversthewholeorpartofGansuprovince,Shannxiprovince,NingxiaAutonomousRegion,InnerMongoliaAutonomousRe-gion,Shanxiprovince,Hebeiprovince,Shandongprovince,Liaoningprovince,Jilinprov-ince,Jiangsuprovince,Anhuiprovince,Henanprovince,BeijingMunicipality,TianjinMunieiPality,BohaiseaandHuanghaisea.
The Empirical Study on Development Value Identity and Requirement of Central Plains Folk Custom Sports Cultural Resources  [PDF]
Deng Fenglian
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37B023

Utilizing the methods of documentary research, fieldwork, expert interviwing and so on, this paper have taken much survey in terms of cognition and value identity situation of Central Plains folk custom sports culture, the motivation of attending this activity, the development requirement trend and this culture heritage development and creation requirement trend and so on to realize the value identity and requirement of Central Plains folk custom sports cultural resources development from the public, further to wake up the attention from the public about this cultural resources which provide the culture and heritage protection, ecnomic constructure and culture constrcture with theoretical references and practical instruction.

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