作者机构：
[Xie, Minyu; Ning, Jianhui] Cent China Normal Univ, Dept Stat, Wuhan 430079, Peoples R China.
通讯机构：
[Ning, Jianhui] C;Cent China Normal Univ, Dept Stat, Wuhan 430079, Peoples R China.
关键词：
invariant estimator;LINEX loss function;non-parametric estimation
摘要：
In this paper we consider the problem of estimation of a continuous distribution function under the LINEX loss function. The best invariant estimator is obtained, and proved to be minimax for any sample size n ≥ 1.
期刊：
2007 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-15,2007年:3605-3608
通讯作者：
Xiao, Ming
作者机构：
[Xiao, Yi] Cent China Normal Univ, Dept Informat Management, Wuhan 430079, Peoples R China.;[Zhao, Hui] Cent China Normal Univ, Dept Math & Stat, Wuhan 430079, Peoples R China.;[Xiao, Ming] Cent China Normal Univ, Ctr Language & Language Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Xiao, Ming] C;Cent China Normal Univ, Ctr Language & Language Educ, Wuhan 430079, Peoples R China.
会议名称：
第三届IEEE无线通讯、网络技术暨移动计算国际会议
会议时间：
2007-09-21
会议地点：
上海
会议论文集名称：
第三届IEEE无线通讯、网络技术暨移动计算国际会议论文集
关键词：
business ontology;e-government;semantics interoperability
摘要：
In order to meet the demand of exchange, share and reuse business knowledge among the different government institutions in e-government, an ontology-based approach to modeling and collaborating e-government business knowledge was proposed. An e-government business ontology (EG- BOnt) was designed. The model of EG-BOnt was described by the IDEF5 graphically. Then the precise syntax and formal semantics of EG-BOnt were defined by OWL language because of its stronger semantics and logic relation expressiveness. Finally, the architecture of e-government knowledge collaboration management platform based on EG-BOnt was presented. This approach accelerates a common understanding of relevant business knowledge and provides a new research direction about implement the interoperation of the heterogeneous government institutions in e-government. It will be helpful to improve the efficiency and quality of e- government services and promote the realization of one-stop e-government.
期刊：
Calculus of Variations and Partial Differential Equations,2007年28(4):471-508 ISSN：0944-2669
通讯作者：
Yang, Jianfu
作者机构：
[Yang, Jianfu] Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China.;Ctr China Normal Univ, Sch Math & Stat, Wuhan 430079, Peoples R China.;Univ New England, Sch Math Stat & Comp Sci, Armidale, NSW 2351, Australia.
作者：
WANG Chunxiang 1,2 ,FEI Pusheng1 1. School of Mathematics and Statistics,Wuhan University,Wuhan 430072,Hubei,China;2. School of Mathematics and Statistics,Huazhong Normal University,Wuhan 430079,Hubei,China
作者机构：
[Pusheng Fei] School of Mathematics and Statistics, Wuhan University, Wuhan, China;School of Mathematics and Statistics, Huazhong Normal University, Wuhan, China;[Chunxiang Wang] School of Mathematics and Statistics, Wuhan University, Wuhan, China<&wdkj&>School of Mathematics and Statistics, Huazhong Normal University, Wuhan, China
通讯机构：
[Pusheng Fei] S;School of Mathematics and Statistics, Wuhan University, Wuhan, China
关键词：
graphs;irredundance set;total irredundance set;total irredundance number
摘要：
This paper discusses the total irredundance relations between the graph G and its clone-contraction graph H, that is, let H be the clone-contraction graph of G and v
1, v
2, ⋯ v
k be all contraction vertices of H. If S is a maximal total irredundant set of H such that A = S∩{v
1, v
2, ⋯, v
k} contains as few vertices as possible, then S′ = S − A is the maximal total irredundant set of G. Furthermore, we obtain the bound of the total irredundance number: irt ⩽ ΔG / 2Δ(G)+1n, which n is the order of graph G, and Δ(G) is maximum degree in G.
会议名称：
MIPPR 2007 Remote sensing and GIS data processing and applications, and Innovative multispectral technology and applications : 15-17 November 2007, Wuhan, China
会议时间：
20071115-17
会议论文集名称：
MIPPR 2007 Remote sensing and GIS data processing and applications, and Innovative multispectral technology and applications : 15-17 November 2007, Wuhan, China
摘要：
The paper presented a method of digital image scrambling based on binary tree generated by chaotic sequences. First, conservative chaos system is iterated to produce chaotic sequences after given initial value and parameters. Then, binary tree is generated by chaotic sequences according to certain rule. At last, the order received by inorder traversing the binary tree is used to transform order of pixels. In this method of digital image scrambling the secret key is initial value and parameters. This method is flexible to use because the secret key is separated from algorithms. It remedies inadequateness of flexibility in other algorithms merely adopting fixed binary tree. Some evaluation indexes show that the method has good effect of image scrambling.
作者机构：
[XU Sen-lin; HU Zi-sheng] School of Mathematics and Statistics, Huazhong Normal University
关键词：
open manifolds;Ricci curvature;conjugate radius;critical point;Excess function;triangle comparison theorem
摘要：
In this paper, we study the relation between the excess of open manifolds and their topology by using the methods of comparison geometry. We prove that a complete open Riemmannian manifold with Ricci curvature negatively lower bounded is of finite topological type provided that the conjugate radius is bounded from below by a positive constant and its Excess is bounded by some function of its conjugate radius, which improves some results in [4].
