实行计划生育人口复杂巨系统的数学模型

提出了实行计划生育人口复杂巨系统的数学模型 ,它是一组无穷维分布参数一阶线性偏微分方程系统 .该模型含有孩次、节育及绝育等与计划生育有关的系数 ,而 Sharpe-Lotka模型没有 ,因此本文所提出的模型克服了 Sharpe-Lotka模型简单粗糙的不足 .     

基于Tabu搜索算法的产品族配置问题研究

产品族的可配置零部件之间存在约束关系,用户需要从产品族的有效配置结果中找到最满意的配置。对于配置项较多的问题,由于搜索空间很大而不能用传统方法求解。给出了按订单装配模式下产品族配置问题的数学模型,并设计了Tabu搜索算法对模型进行求解。使用了动态惩罚、频数表、多阶段搜索和优化配置池等方法改进了算法的效率。应用模型和算法对复合热载体产品进行了仿真计算,取得了比较好的效果。     

多分辨率模型系中的一致性问题研究

在多分辨率建模中，保证不同分辨率模型之间的一致性是多分辨率建模的重要任务之一。首先提出了多分辨率模型系的概念和多分辨率模型系中模型间一致性的概念。在此基础上从仿真分析层、I／O层、状态层和结构层等四个不同层次上研究了不同分辨率模型之间的联系，给出了不同层次上模型之间一致度的计算公式。     

Product Family Hierarchical Associated Design and Its Hierarchical Optimization

After reviewing the literature and methodology-related issues within the field of product family design, a deficiency in the current design and development of product family is pointed out. The concept of hierarchical associated design is proposed in this article, according to the deficiency~ and the methods and models for realizing the notion above are described. A two-dimensional analytical model is constructed based on the composing levels and developing processes of product family. The optimization models to hierarchical associated design problems are grouped into two categories： overall-local and key-subordinate. The algorithms of the models are discussed in this paper     

小康社会与小康家庭的定量研究模型

中国小康社会的指标体系分国家层面、社会层面和家庭层面给出,小康家庭识别模型由一级、二级指标和测量要素来刻划,用属性识别的数学方法给出定量的计算.     

趋势预测方法及其在邮电通讯中的应用

主要通过建立反映汉中地区城乡居民住宅电话需求趋势的Ｃｏｍｐｅｒｔｚ增长模型，对该地区城乡居民住宅电话需求量的饱和年份及未来各期的需求量进行了分析、预测。     

不同农药残留标准下家庭农场种植行为选择

文章建立了政府与家庭农场农户之间的博弈模型,探讨在不同农药残留标准下政府如何对生态种植行为进行激励.研究表明,在宽松的农药残留标准下,政府可通过征收农药税等方式提高农药成本来激励农户选择生态种植,生态补贴及超标罚款的效果不明显;在严格的农药残留标准下,当农产品抽查难度较大时,政府可选择降低检查概率,同时大幅度提高农药价格来增加农户使用生态种植的动机;当政府对农药成本控制力较低或农药价格增量的边际效益较小时,政府应提高其检查概率,同时提高对于农药残留超标的罚款及生态种植的补贴来激励农户使用生态种植.     

CONVOLUTION THEOREM AND ASYMPTOTIC EFFICIENCY IN TWO SIDE TRUNCATED DISTRIBUTION FAMILY—THE NORMAL CASE

In the distribution family with common support and the one side truncated distribution family, Bickle, I. A. Ibragimov and R. Z. Hasminskii proved two important convolution theorems. As to the two-side truncated case, we also proved a convolution theorem, which plays an extraordinary role in the efficiency theory. In this paper, we will study another kind of two-side truncated distribution family, and prove a convolution result with normal form. On the basis of this convolution result, a new kind of efficiency concept is given; meanwhile, we will show that MLE is an efficient estimate in this distribution family.     

卫星星座导航数学仿真系统及其关键技术研究

为了研究卫星导航系统的星座覆盖性能,信号链路、时间系统等关键技术和性能指标,有必要建立导航星座仿真系统,完成导航星座系统在各种模式下的工作状态模拟并对其结果进行分析和评估.论述了基于高层体系结构(HLA)仿真平台下的卫星星座导航数学仿真系统的总体设计,介绍了卫星导航星座分系统以及仿真支撑环境的功能.在此基础上,分别对仿真时间的推进策略、数据分发管理、仿真时间同步以及卫星轨道确定等关键技术进行了分析与研究.试验结果表明,本文设计的仿真系统及采用的若干关键技术,能够很好的满足仿真与评估的需求,对我国北斗卫星导航系统的研制具有重要的参考价值.     

基于运营视角的产品族规模

产品族规模一直是两难问题。通过讨论产品族规模效用和产品族成本,分析了产品族整体利润最大化的决策条件,得到产品族规模与价格的最优决策路径。研究表明:产品族规模与价格并不直接相互影响;产品族规模效用、消费者分布和产品族产品项目变动成本分布是影响产品族规模与价格决策的重要因素。     

ASYMPTOTIC PROPERTIES OF MLE IN EXPONENTIAL FAMILY NONLINEAR MODELS

1.IntroductionSupposethattherandomvariablesyi5y2,'',y.areindependentandeachyihasdensity:withrespecttoaa-finitemeasurev,whereb,c,]areknownl'unctions;fiisaknownq-vectordefinedinX,Pistheunknownp-vectorparameterdefinedinB,oiisthenaturalparameter,andaisascaleparameter.Then(1)iscalledtheexponentialfamilynonlinear..dels[2]whicharenaturalextensionofgeneralizedlinearmodelsandnormalnonlinearmodels.Inthispaper,wegeneralizetheasymptoticresultof[1]and[3,4]toexponentialfamilynonlinearmodels.Section2gives…     

A UNIFIED APPROACH TO THE METHOD OF GRADIENT PROJECTION WITH ARBITRARY INITIAL POINT

In this paper,we present a family of gradient projection method with arbitrary initialpoint.The formula of search direction in the method is unitary.The convergent conditions ofthe method are given.When the initial point is feasible,the family of the method contains severalknown algorithms.When the initial point is infeasible,the method is exactly that given in[6].Finally,we give a new method which has global convergence property.     

一般变权原理与多目标决策

在已有文献基础上完善了变权的公理化定义 ,讨论了变权的基本类型及它们之间的关系 .在此之后 ,深入研究了由激励效用族诱导的变权的特性 ,给出了变权的协调原理并以此为原则给出了某种特定的变权 ,从而使变权更具可操作性 .最后 ,给出了解多目标问题的变权方法.     

股权激励下家族企业职业经理人对非效率投资的影响

投资是维持企业持续经营和发展的基础,一直以来都是学术界研究的热点话题.作为民营企业的重要组成部分,我国家族企业经过40年的发展,目前进入代际传承的关键时刻,同时传统的家族管理模式已经显现出一定的弊端,向现代家族企业职业化转型已是一种必然趋势,选择职业经理人还是家族成员担任CEO对企业的投资行为具有重要的影响.本文以20...     

基于图文法的产品族表达方法

针对大规模定制产品族开发迫切需要计算机管理的问题,提出了一种基于图文法的产品族表达方法。阐述了大规模定制产品族开发的原理,并在功能域和物理域中建立了产品的图模型,在此基础上分别在功能域和物理域中建立了产品族的图文法模型,分析了新产品从功能域到物理域的生成过程。最后以某摩托车产品族为例,说明了模型的应用过程。     

Predicting status of Chinese listed companies based on features selected by penalized regression

China’s companies have attracted much attention due to the development of stock market in China. The listing status of listed Chinese companies becomes an important indicator which implies the potential risk of a stock. Thus predicting the status of listed Chinese companies is obviously crucial for stockholders and investors when they make further decisions. According to the four possible listing statuses for Chinese companies, researchers formulate the above issue as a classification problem which is typical in data mining area. Plenty of classification techniques have been implemented to predict the status of the listing Chinese companies based on their financial factors. Usually, there are more than 150 financial factors for each of the listed companies, and feature selection is needed before the implementation of classification methods. In the literature, researcher used t-test with variance inflation factor (VIF) analysis to select relevant factors. However, such method can not be applied in the high dimensional case. In this paper, we apply the idea of penalized regression to select the interested factors based on a logistic regression model, and then apply popular classification methods to predict the companies’ statuses. Our results show that the proposed method can find more representative factors and improves the prediction accuracy of the classification methods.     

山西煤炭资源型城市产业转型系统研究

山西是我国能源重化工基地，煤炭资源型城市占有很大的比例，这些城市往往都以煤炭产业作为主导产业，也都会遇到煤炭资源枯竭的那一天，产业转型具有客观必然性。目前，煤炭资源型城市在产业转型中遇到了许多困难，如城市演化陷入多难境地、生态环境对产业转型的压力突出等。认为：煤炭资源型城市产业转型涉及各个方面，是一个复杂的系统工程，主要包括产业转型的动力系统、支持系统、创新系统、转换系统。因此要用系统工程的理念建立产业转型机制，通过各项措施的实施，以顺利完成煤炭资源型城市主导产业的转型。     

双环网络G(N;1,s)的L形瓦仿真算法

提出双环网络G(N;1,S)的L形瓦仿真算法,利用VB6.0作为编程语言、SQL Server2000作为数据库来实现这一算法,对任意给定N,而2=相似文献   

Uniform Convergence of the Solutions of Riccati Equations for a Family of Optimal Control Problems

The uniform convergence of the solutions of a parameterized family of Riccati differential equations which arise in the context of optimal control problems for systems described by a family of linear time-varying evolution equations is considered on the infinite time interval in Hilbert space. Some sufficient conditions and an illustrative example are given for uniform convergence of the solutions of a family of the Riccati differential equations. The uniform convergence of the solutions of the Riccati differential equations with respect to parameters is important for applications to problems in adaptive control of stochastic evolution systems.     

Family genetic algorithms based on gene exchange and its application

1. INTRODUCTION Genetic algorithms (GA) are a search techniques bas-ed on mechanics of nature selection and were initiallyproposed by Holland[1]. GA have already beensuccessfully applied in many diverse areas, such asfunction optimization, the traveling salesman proble-ms, multiobje-ctive optimization problems, schedulingneural network design, system identification, visioncontrol and machine learning. A detailed review ofthese applications is provided in Refs. [2] and [3]. The strength …