Through the research of crosslinking of matrix resin , heating treatment of composite and mixing of different polymer , we draw some conclusions : 1 、 percolation theory can explain the phenomenon of the jump of resistance when the content of cb reach a critical volume ; 2 、 based on ohm conduct theory , abounded to the percolation the wbibull statistical theory and other theory , an adapted theory was obtained to explain the jump of resistance and the other phenomenon ; 3 、 the ntc phenomenon was eliminated by crosslinking the matrix of conductive composite , at the same time the stability of composite was improved 通过对基体树脂的交联、复合材料的热处理、聚合物共混物的研究得出了如下的结论: 1 、渗滤理论能够很好的解释导电粒子含量达到某一值时电导率剧增的问题; 2 、在欧姆导电模型的基础上,综合应用了weibull统计理论模型,结合原来的体积膨胀等理论,成功的解释了ptc复合材料在基体材料熔点附近的跳变问题、 ntc现象以及热循环稳定性等问题; 3 、有机ptc导电复合材料经硅烷交联以后能够消除ntc现象,改善了导电复合材料的稳定性能。
The study lies in following aspects : 1 ) a great number of experiments on sfrc are carried out to obtain the basic data of sfrc energy properties , which are the fundamental parts of further study . 2 ) a probability analysis based on statistical theory is done to all the experiment data . in the end , energy criterion for sfrc associated with security criterion are calculated and listed for future use 本文主要针对钢纤维喷射混凝土在单层隧道衬砌中的应用进行了研究,内容包括以下几个方面: 1 )进行了大量的钢纤维混凝土标准试件试验,试验的成果和数据为研究钢纤维混凝土的能量特征提供了事实依据和参考; 2 )运用概率统计方法对钢纤维混凝土的指标进行了可靠性分析,得出了实际可以接受的保证率下的钢纤维混凝土能量指标; 3 )通过合理的假设和简化,研究了钢纤维混凝土构件在破坏过程中的能量耗散机理。
Since ihe pioneering work of onsager , flory , and maier and saupe , many theoretical physicists have devoted themselves to the work on improving and perfecting molecular statistical theory on the basis of a large of experimental results , such as chandrasekhar , humphries , luckhurst , gelbart , baron , cotter 自onsager , flory , maier和saupe先后提出和发展了液晶分子统计理论以来,在大量的实验结果的基础上,许多理论物理学家致力于改进、完善液晶分子理论的工作,如chandrasekhar 、 humphries 、 luckhurst 、 gelbart 、 baron 、 cotter等。
Based on these , referring to the experience of listing company ' s evaluation system in developed countries , considering china ' s reality , utilizing modem scientific evaluation theories and statistical theories , and employing tactics integrating qualitative and quantitative analysis , this thesis has designed a new listing company ' s evaluation system . finally , the thesis uses this system to evaluate the companies that listed in shenzhen new component index 在此基础上,借鉴西方国家公司评价的经验,并结合我国当前的实际,运用现代科学测评理论与数理统计理论,采取定性与定量分析相结合的方法,设计了一套上市公司评价指标体系,最后运用该体系对深圳新成份指数上市公司进行了综合评价。
Because the models are all empirical ones established based on deficit experiment , the application of them should be limited above the low soil moisture of the water deficit experiment according to statistical theory , otherwise the prediction of crop yield by the models may produce considerable error 作物水分响应模型均为按非充分灌溉试验得到的经验模型,按数理统计和应用要求使用时应限制在非充分灌溉试验处理的水分下限值以内,不宜随意外推,否则预测或模拟的作物产量可能会有较大误差。
This paper analyzes the characteristics of rainfield and raindrops , gives - formulae to calculate falling velocity of raindrops , studies the frequency of raindrops hitting detonating area of fuzes head on ballistic trajectory based on the theory of exterior ballistics and uses statistical theory to study methods of rainfield simulation 本文分析了雨场和雨滴的各种特性,给出了雨滴降落速度的计算公式,利用外弹道学的理论研究了引信头部触发区在弹道上与雨滴碰撞的频率,同时还采用统计学手段对雨场仿真的方法进行了研究。
The objective of this paper is to make a deep research and a careful analysis on traditional bayesian dynamic images analysis methods at first , and then to propose a new more accurate and faster method of dynamic images analysis , which is based on bayesian statistical theory and multi - resolution technique 本文的研究目的是先对bayesian统计分析方法在运动图像分析过程中的应用进行深入的研究和比较,再在此基础上,利用多分辨率技术,构造出一种新的运动图像分析方法,它应该具有更高的精确度和更高的运算速度。
It can be used to measure mechanical and electrical parameters of relay ; because the reliability of electromagnetic relay is very important to the safe running of the control system , this paper introduces a reliability index for micro - electromagnetic relay . the compliance test - plan of success ratio for it is studied through the application of bayesian theory . the paper compares the methods of classical statistical theory and bayesian theory for making sampling plan of success ratio 此外,本文还介绍了由msc - 51单片机控制的继电器参数测试系统的原理和方法,能对机械参数和电气参数进行测试;由于电磁极化继电器可靠性的高低将直接影响控制系统的安全运行,研究了用bayes理论设计电磁继电器产品的成功率验证实验方案,并与经典方法设计的成功率验证方案进行了比较,在特定的先验信息下, bayes方案所需的样本容量较小。
The kinetic equations for the qgp have been formed under the general frame of the statistical theory and its dynamic basic is the quantum chromodynamics ( qcd ) , which the component particles of the system obey . they are widely used in investigating the properties of the qgp . there are two basic forms of the qgp kinetic theory : quantum kinetic theory and ( semi - ) classical kinetic theory Qgp动力论的基本方程是以系统的成分粒子(夸克、反夸克和胶子)所服从的qcd为动力学基础,按统计理论的一般框架建立起来的,现已广泛应用于讨论qgp的物性,并已证实在“硬热圈”水平上动力论和温度场论的结果是一致的,因而该理论得到普遍的承认。
The important research is about the theory and methods of the cluster analysis in view of statistical theory , the theory and methods of fuzzy cluster analysis , the fkn " s structure and the fkn ' s study algorithm ( fkn , fuzzy kohonen network ) - the organic fusion of the fuzzy c - means algorithm and self - organized feature map neural network . the paper proposes the ifkn ( improved fkn ) on the basis of the hard classification idea and the soft classification idea , then carries on the cluster analysis of the artificial synthetic control chart time series through matlab program and tt ? cluster result matches the cluster result of the famous dataengine " s software of the intellectual data analysis and data mining from german mit company . finally , the paper discusses the applying of the cluster analysis to the control process , which can be widely applied to the pattern recognition of the parameter " s changing trend during the control process and the image partition processing , and utilizes the ifkn to recognize the thermotechnical parameter " s changing trend based on the engineering of clinker sintering rotary kiln automatic control system of guizhou " s aluminium factory , through which good effect is obtained 数据挖掘技术在商业领域中已广泛使用,然而在工业过程控制中的应用却极少,本文正是在这种背景下,对数据挖掘中的聚类分析方法及其在工业过程控制中的应用研究作了偿试,重点研究了基于统计理论的聚类分析理论和方法,模糊聚类分析理论和方法及模糊kohonen网络( fkn )的结构与学习算法,即模糊c ? ?均值算法与自组织特征映射神经网络( kohonen网络)的有机融合,并根据硬分类思想及软分类思想提出了改进的模糊kohonen网络( ifkn ) ,通过matlab编程对人工合成控制时序图数据集进行聚类分析,其聚类效果与当今广泛使用的数掘挖掘软件平台,德国mit公司著名的dataengine智能数据分析和数掘挖掘软件的聚类效果相当,最后,论述了聚类分析在控制中的应用,它可以用于过程控制中的参数变化趋势的模式识别及图象分割处理等具体应用中,并以贵州铝厂熟料烧结回转窑自动控制系统为工程背景,利用ifkn识别其热工参量变化趋势,取得了较理想的效果。
The theory of statistics provides a basis for the whole range of techniques, in both study design and data analysis, that are used within applications of statistics.Cox & Hinkley (1974, p.