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Weak minimum aberration and maximum number of clear two-factor interactions in 2_(IV)^(m-p)designs

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Science china Mathematics 2005年第11期48卷 1479-1487页

作者： YANG Guijun,LIU Minqian & ZHANG Runchu Department of Statistics, Tianjin university of finance and economics, Tianjin 300222, china Department of Statistics, school of Mathematical Sciences and LPMC, Nankai university, Tianjin 300071, china 1. Department of Statistics Tianjin University of Finance and Economics 300222 Tianjin China 2. Department of Statistics School of Mathematical Sciences and LPMC Nankai University 300071 Tianjin China

Both the clear effects and minimum aberration criteria are the important rules for the design selection. In this paper, it is proved that some 2IVm-p designs have weak minimum aberration, by considering the number of clear two-factor interactions in the designs. And some conditions are provided, under which a 2IVm-p design can have the maximum number of clear two-factor interactions and weak minimum aberration at the same time. Some weak minimum aberration 2IVm-p designs are provided for illustrations and two non-isomorphic weak minimum aberration 2IV13-6 designs are constructed at the end of this paper.

关键词： clear weak minimum aberration resolution wordlength pattern.

Large-deviation probabilities for maxima of sums of subexponential random variables with application to finite-time ruin probabilities

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Science china Mathematics 2008年第7期51卷 1257-1265页

作者： JIANG Tao school of finance,Zhejiang Gongshang university,Hangzhou 310018,china 1. school of finance Zhejiang Gongshang University Hangzhou 310018 China

We establish an asymptotic relation for the large-deviation probabilities of the maxima of sums of subexponential random variables centered by multiples of order statistics of *** uniform random *** extends a corresponding result of *** an application,we generalize a result of Tang,the uniform asymptotic estimate for the finite-time ruin probability,to the whole strongly subexponential class.

关键词： large-deviation probability strongly subexponential distribution finite-time ruin probability the compound Poisson model uniform asymptotics 91B30 60G70 62P05

Uniform estimate for maximum of randomly weighted sums with applications to insurance risk theory

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Science china Mathematics 2005年第10期48卷 1379-1394页

作者： WANG Dingcheng~1 SU Chun~2 & ZENG Yong~1 1. school of Management and school of Applied Mathematics,university of Electronic Science and Technology of china,chengdu 610054,china 2. Department of Statistics and finance,university of Science and Technology of china,Hefei 230026,china 1. school of Management and school of Applied Mathematics University of Electronic Science and Technology of China 610054 Chengdu China 2. Department of Statistics and finance University of Science and Technology of China 230026 Hefei China

This paper obtains the uniform estimate for maximum of sums of independent and heavy-tailed random variables with nonnegative random weights, which can be arbitrarily dependent of each other. Then the applications to ... 详细信息

关键词： dependent stochastic return, discount factor, heavy-tails, discrete time insurance risk model, maxima of randomly weighted sums, ruin probability, tail probabilities, uniformly asymptotic estimate.

隐喻性言语行为模式下的话语交际构建机制研究

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外语教学与研究 2011年第5期43卷 676-688,799页

作者：张玮西南财经大学经贸外语学院四川省成都市611130

本文根据隐喻性交际自身的特点,提出了一个由喻内行为、喻外行为和喻效行为构成的隐喻性言语行为理论框架,一方面可以作为由隐喻所构建的会话分析模式,另一方面体现了交际双方在隐喻性交际事件中的互动性与合作性。

关键词：隐喻言语行为交际构建

Study on Sustainable Development in Vulnerable Eco-areas

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Chinese Journal of Population,Resources and Environment 2004年第3期2卷 14-19页

作者： Zhang Juntao & Li Jin school of Public Administration, Dongbei university of finance and economics, Dalian 116025, china school of Public Administration Dongbei University of Finance and Economics Dalian 116025 China

The vulnerable eco-area is one of the important research targets in the field of sustainable development. It is the requirement of building a well-off society in an all-round way that we should study more on the vulnerable eco-areas, deal with the relationship between environmental protection and economic development, speed up the economic development in these areas and increase the living standard of the local people. This paper puts forward the countermeasures of environment---economy coordination, on the basis of the recognition of eco-environment features and social economic conditions in the vulnerable eco-areas of china, in view of the progress in sustainable development studies of the vulnerable ones, taking the transitional areas of farming and pasturing in northeast china as an example to study the regional environment vulnerability.

关键词： vulnerable eco-area sustainable development transitional areas of farming and pasturing in northeast china

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我国农村社会保障体系中的非正式保险制度

四川大学学报（哲学社会科学版） 2004年第6期 5-10页

作者：王凯西南财经大学保险学院四川成都610074

社会学和经济学关于发展中国家农村社区风险保障制度的研究认为 ,在总体欠发达农业社区 ,非正式的保险制度存在和运行是合理的 ;它的效率次于正式保险制度 ,但在社区风险保障中发挥着重要和广泛的作用。从我国农村社区风险保障制度需求... 详细信息

社会学和经济学关于发展中国家农村社区风险保障制度的研究认为 ,在总体欠发达农业社区 ,非正式的保险制度存在和运行是合理的 ;它的效率次于正式保险制度 ,但在社区风险保障中发挥着重要和广泛的作用。从我国农村社区风险保障制度需求和供给层面分析 ,非正式保险制度在我国农村的历史和现实中 ,都扮演着重要角色。

关键词：非正式保险制度分析农村社区社会保障

Nonlinear boundary value problems for discontinuous delayed differential equations

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Applied Mathematics(A Journal of Chinese Universities) 2010年第1期25卷 9-17页

作者： SUN Wu-jun Department of finance & Insurance, Business school of Nanjing university, Nanjing 210093, china Department of finance and Insurance Business School of Nanjing University Nanjing China

In this paper nonlinear boundary value problems for discontinuous delayed differen- tial equations are considered. Some existence and boundedness results of solutions are obtained via the method of upper and lower solutions, which may be discontinuous. Our analysis can be applied to those phenomena from physics and control theory which have been successfully described by delayed differential equations with discontinuous functions, such as electric, pneu- matic, and hydraulic networks. It is also an important step to precede the design of control signals when finite-time or practical stability control are concerned.

关键词： Nonlinear boundary value problems upper and lower solutions discontinuous delayed differentialequations Carath^odory conditions existence of solutions.

DYNAMIC CHARACTERISTICS OF LIQUID SLOSHING IN A TRANSVERSELY VIBRATING SPHERICAL TANK WITH A SPACER UNDER LOW GRAVITY

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Journal of Hydrodynamics 2008年第6期20卷 762-769页

作者： CHENG Xu-duo HU Mei-zhu WEN Ji-hua school of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210003 China Department of Physics Anqing Teachers College Anqing 246011 China

The dynamic characteristics of liquid sloshing in a transversely vibrating spherical tank with spacer under low gravity were investigated. By expanding the characteristic functions, the frequencies and velocity potentials of liquid free-sloshing were obtained. The dynamic equations and boundary conditions of liquid sloshing in the traverse vibrational spherical tank with spacer under low gravity were derived. By modifying the velocity potentials of liquid free-sloshing, the velocity potentials of liquid sloshing in the traverse vibrating spherical tank with a spacer were obtained. Furthermore, the forces and the moments acting on tank wall were given. The numerical results show when a spacer is inserted in the tank, the sloshing frequencies of liquid and the forces acting on tank wall will decrease, but the moment of force to the centre of the tank which is caused by the force of liquid acting on the spacer will occur.

关键词： low gravity liquid forced sloshing sloshing suppression

DYNAMIC CHARACTERISTICS OF LIQUID FORCED SLOSHING IN A TURNING SPHERICAL TANK WITH A SPACER UNDER LOW GRAVITY

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Journal of Hydrodynamics 2008年第2期20卷 202-209页

作者： CHENG Xu-duo HU Mei-zhu WEN Ji-hua school of Food Science and Engineering Nanjing University of Finance and Economics Nanjing 210003China Department of Physics Anqing Teachers College Anging 246011 China

Under the condition of low gravity the characteristics of liquid forced sloshing in a turning spherical tank with a spacer were investigated. The static shape of the liquid surface was analyzed. By expanding the characteristic functions, the frequencies and velocity potential of liquid free-sloshing were derived. The governing equations and boundary conditions for the forced sloshing of liquid under the tank turning were established. The transverse force of liquid acting on the tank and the moment of force to the centre of the tank which is caused by the force of liquid acting on the spacer were given. Numerical results were compared with the ones of the spherical tank without a spacer. The results show that when a spacer is inserted in the tank, the sloshing frequency of liquid and the transverse force of liquid acting on the tank will decrease, but the moment of force to the centre of the tank which is caused by the force of liquid acting on the spacer will occur.

关键词： low gravity forced sloshing of liquid sloshing suppression