New design and analysis of finite difference domain decomposition algorithm for the two-dimensional heat equation

<正> It is presented in this paper that the new design and its analysis of finite difference domaindecomposition algorithms for the two-dimensional heat equation,and the numerical results have shownthe stability and accuracy of the algorithms,where Saul'yev asymmetric schemes have been used atthe interface points.The Algorithm Ⅱ in this paper has further extended those developed by Dawsonand the others,Zhang and Shen.     

Integral-type tests for goodness-of-fit

<正> A family of integral-type goodness-of-fit tests is investigated.This family includes someexisting tests,such as the Cramér-von Mises test and Anderson-Darling test,etc.The asymptoticdistributions of the tests in the family under the null and local alternative hypotheses are established.The almost sure convergence under a fixed underlying distribution is obtained.Furthermore,simulationsare conducted to compare the powers of the tests in the family.Simulation results show that fordifferent alternatives,the more powerful tests are different,and the parameter λ has great influence onthe tests in small sample cases.     

Adaptive tracking control for actuator failure compensation based on MT-filters

<正> This paper considers the problem of actuator failure compensation for a class of nonlinearsystems in the form of output-feedback.MT-filters are exploited to estimate the unmeasured states.The backsteppping technique is used to construct the controller recursively.The proposed compensationscheme can grantee the boundedness of all the closed-loop signals and asymptotic output tracking.Thetheoretical results are illustrated by a simulation example.     

Waveform diversity based sonar system for target localization

A new monostatic army system taking advantage of diverse waveforms to improve the performance of underwater target localization is proposed.Unlike the coherent signals between different elements in common active array,the transmitted signals from different elements here are spatially orthogonal waveforms which allow for array processing in the transit mode and result in an extension of array aperture.The mathematical derivation of Capon estimator for this sonar system is described in detail.And the performance of this orthogonal-waveform based sonar is analyzed and compared with that of its phased-array counterpart by water tank experiments.Experimental results show that this sonar system could achieve 12 dB-15 dB additional array gain over its phased-array counterpart,which means a doubling of maximum detection range.Moreover,the angular resolution is significantly improved at lower SNR.     

福建省经济增长的效率评价

为了定量地评价经济运行质量,应用数据包络分析(DEA)的理论和方法,对福建省改革开放以来经济增长效率进行评价,得到一些对促进经济增长有益的结论。     

工程系统多目标多层次模糊决策模型及其应用

在进行工程系统某些的问题决策时 ,需考虑的因素 (目标 )往往很多 ,且各因素之间还存在不同的层次。为此 ,根据模糊数学的基本理论 ,首先提出层次判断矩阵的建立和层次单排序方法 ,在此基础上 ,利用合成层次总权重来构筑多目标多层次模糊决策模型。最后 ,结合具体实例展开应用研究 ,该结果可为实际的工程系统决策由定性到定量计算提供一种新的思路。     

作物品种区域试验的评价体系及评价方法

从作物品种区域试验的实际需要出发,提出了区域试验的试验评价和品种评价的体系,并对具体评价方法和指标作了概述和比较,指出了其中尚待解决的难点,同时论述了区域试验中应注意的问题.表1,参29.     

基于模糊规则的病虫害预防研究

基于Takagi-Sugeno模糊逻辑系统,运用遗传算法提取模糊规划,构建系统的模糊模型,并用于病虫害的预测工作。图2,表1,参6。     

四维搜索——交通OD流的一种解法

交通ＯＤ流的解法从二维搜索发展到三维探索。本文提出四维搜索的方法。二维搜索是解决所谓的“两端守恒”问题,三维搜索是求解网络特性参数问题,而四维则是将节点的直达流与迂回流分离,即求解节 生量和集中量问题。     

综合交通枢纽的虚拟组织协同管理模式研究

交通运输业是一个集多种运输方式于一体的综合运输系统。其中综合交通枢纽的规划与管理是一个重要环节,运用系统工程和管理理论来研究我国综合交通枢纽的作业过程、信息共享和多组织的Ａｇｅｎｔ代理管理模式等将有助于综合运输体系的形成。本文系统地绘出综合交通枢纽的管理与发展过程,提出综合枢纽的虚拟组织发展模式,为综合交通枢纽管理向有序化发展提供一种尝试。