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The dissertation focuses on performance gradient estimation and SRO algorithm of DES aswell as other related topics,such as modeling of DES and discrete event simulation,performancemeasure Hessian matrix estimation,Stochastic Approximationand so on.General Semi-Markov Processis adapted to describe behaviour of DES and discrete eventsimulation.A general result is obtained and applied to analyze strong consistency of performancegradient Perturbation Analysisestimator.Conditions for effectiveness of InfinitesimalPerturbation Analysisare also discussed.New PA algorithms,such as server PA,PA usingDirac generalized function,job sequence PA etc.,are proposed to deal with discreteparameters.Furthermore,strategies of combining PA algorithms with certain iterative rules areanalyzed widely in order to optimize DES parameters and some SRO algorithms are constructed toslove DES optimization problems.
论文将DES性能分析领域中性能梯度估计和单运行仿真优化作为主要的研究对象,探讨了与性能梯度估计有关的DES和离散事件仿真过程建模、高阶导数估计以及随机逼近等理论和方法;建立了具有一般性的DES和离散事件仿真的广义半Markov过程模型;获得了分析性能梯度估计量强相合性的理论结果和无穷小摄动分析算法应用的条件;提出了诸如服务台数目的摄动分析、奇异摄动分析、串联生产线和加工车间中工件加工序的摄动分析等一系列摄动的思想和算法,对连续参数和离散参数都进行了深入的研究;对摄动分析算法同优化规则结合实现仿真优化的策略也进行了广泛的分析,构造了新型的变界截尾的随机逼近算法,并用于DES的单运行仿真优化研究;最后,给出了DES性能分析方法的实证性研究结果。
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The main results of the investigation are as following:(1) Some important criteria for the design of multi-layer structure are acquired: the ratio of the layer thickness to the contact diameter should be controlled to a value about 0.8; increasing the number of the gradient layers and elasticity modulus of the top layer would benefit to the yield strength and the stress status at the interface.(2)By means of molecular dynamics simulations for a indentation and sliding process, it is discovered that dislocations of 45 direction to the surface occur in the surfaces layer, which is correspond to the direction of the plastic flows observed in the macroscopic continuous medium. The irreversible deformation caused by the dislocation and the atom piles at the surface are responsible for the irreversibility of the force response. They are also the main factors for the friction generation. The temperature and the indentation velocity have significant effects on the deformation behaviors of the material of the surface layer. The yield strength would increase obviously if the indentation velocity is greater than 10 m/s.(3)A method to evaluate the fracture toughness of coating by estimating the crack-density functionβof a Wicker''s indentation was proposed. Meanwhile a new surface treatment technology was developed using non-equilibrium plasma.(4)A MD-FE hybrid method and corresponding software was developed to analysis the tribological behaviors for multiplayer system.
研究主要内容和结果有:(1)得到指导梯度膜设计的几个准则:控制膜层厚度与接触半径比在0.8左右为宜;适当增加梯度层层数和顶层弹性模量,有利于提高抗屈服能力和改善界面处的应力状态;(2)通过对嵌入和滑动摩擦过程的分子动力学模拟,发现表层产生一个与宏观连续介质的塑性流动方向观测一致的45 方向位错;位错造成的不可逆变形和表面的原子堆积,是力的响应不可逆性的原因,也是构成摩擦力的主要因素;温度和嵌入速度对材料变形特性有显著的影响,当嵌入速度大于10 m/s时,屈服强度明显增加;(3)提出压痕裂纹密度系数β半定量判定膜层断裂韧性的方法;并开发出表面强化新工艺;(4)开发出分析表面摩擦学特性的MD-FE复合模拟方法和相应模拟软件。
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Finally, it analyses the time complexity of the algorithm and researches how it is influenced by culture operator.3、The paper presents the evaluation standard of the GA's application capability. Basing on characters such as continuity, multi-peak, vibration, randomicity as well as large-scale, five functions are selected to test search ability and robustcity of co-evolution algorithm. Finally, it analyses the simulation result and researches the influence of algorithm brought by culture operators.4、Basing on the concept of collection overcast, it researches the task distribution issue and constitutes delaminated math model on task distribution issue. It puts out the co-evolution algorithm of subtask's decomposing. The experiment compare IGA、SGA to CN and validates the efficiency of co-evolution algorithm on the NP completeness issue.5、Being aim at the optimization issue of load of antenna near ground, it combines many GA strategies and puts forward strategic meme. And it puts out co-evolution algorithm of load of antenna design. And it emulates the optimization design of load of antenna near ground. Finally, it valuates the co-evolution algorithm's efficiency on the continuum search issues of multi-variable and multi-peak value.6、Being aiming at the knowledge of image model matching, it adopts single meme and real code. It puts out fast co-evolution matching algorithm strategy. Basing on NPROD resemble measurement, I emulate the indiscrimination model matching and discrimination model matching. Finally, it valuates the co-evolution algorithm's efficiency on the real code and real time search issue.
分析了算法的时间复杂度,研究了文化算子对算法时间复杂度的影响。3、提出了GA的应用性能评价标准,从连续性、多峰性、随机性、振荡性、广域性多个角度出发选择五个测试函数,对共同进化算法的搜索性能和鲁棒性作了函数优化的性能测试,分析了仿真结果,研究了文化算子对算法的影响。4、基于集覆盖的概念,研究了MAS中的任务分配问题,建立了任务分配问题的分层数学模型,给出了子任务分解共同进化算法,实验比较了IGA、SGA、CN,验证了共同进化算法对NP完全问题的有效性。5、针对近地天线加载优化设计问题,结合多种改进GA策略,提出了策略型拟子,给出天线加载设计的共同进化算法,对有耗半空间对称偶极子天线加载优化设计作了仿真实验,验证了共同进化算法对多变量多峰连续搜索问题上的有效性。6、针对图像模板匹配问题的领域知识,采用单类拟子和实数编码,给出快速共同进化匹配算法策略,基于NPROD相似度测度,仿真试验了无差别和有差别模板匹配,验证了共同进化算法对实数编码和实时性搜索问题上的有效性。
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For regular topology surface, intermediate surface local texture mapping are used; for irregular topology surface, subdivision surface local texture mapping are used. So different topology surface using different texture mapping methods can solve the contradiction between texture effect and processing speed when they are dealt with by single method. The three judge conditions of texture distortion in the process of mapping onto the sphere surface are discussed and the exiting algorithms of mapping are analyzed, the new algorithms of mapping onto the sphere surface are presented. In order to enhance the realistic of graphics, a new function of wood texture is presented. OpenGL is also introduced in this papers and some realization examples of texture mapping based on OpenGL under the environment of VC++ and POV-RAY are presented in some chapters.
对于简单拓扑表面,利用改进的两步纹理映射,对于复杂拓扑表面利用新的面片分割算法,初步解决了颜色纹理中速度与走样之间的矛盾;通过对球面纹理时纹理不变形的三个判断条件的研究,分析了现在各种球面纹理映射算法,并在此基础上提出了一种基于等面积的半球面纹理映射算法,明显减少了球面纹理的纹理变形;针对现有的木纹纹理中,两种表示木纹的颜色差距表现出的颜色突变问题进行研究,提出对这两种颜色进行线性插值或二次插值,使生成的木纹纹理颜色更加连续,更加逼真;在VC++环境下,通过调用Open GL的图形库及在Pov-Ray软件环境下,实现了参数化纹理、球面纹理、凹凸纹理及木纹纹理等各种算法。
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Focusing on them, author has been investigating in open country and collecting, arraging and analyzing material for one and a half year. After having done the study on the new deep prediction, author presents new opinion on the base of part of precious geological opinion .1, Xiaohe deposit direction and turn are mainly controlled by the second structure rochet vault in the back of Bigsnown mountain. It is conjectured that the axis extent with the current direction to the 180# exploring line and turn to northwest-southeast direction. During the extension, the deposit body would extend from deep to low instead from low to deep. The turning place was level corresponding to the core of rocket vault.2, There are a chain of radiate blind regmagenesis controlled by the rocket vault.
笔者针对这两个问题,通过一年半的野外实地调查和室内资料收集整理分析,在进行了新的深部找矿研究工作之后,在认同前人部分地质观点(即小河~石门坎矿带的连续是存在的)的基础之上,又提出了新的观点,即: 1、小河矿床矿体的走向及转向位置主要受大雪山背斜的次级构造火箭山穹隆控制,推测其轴线将沿现在的走向,延伸至180#勘探线附近发生转向,轴线方向逐渐转为北西——南东方向,同时矿体从由浅至深逐渐变为由深至浅的延伸状态。
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The paper focuses on the tetraploidy black locust on Loess plaeatu of West Shanxi province, applys steady state promoter method and image processing technology to study the days transpiration water consumption in different weather ,different seasons and different site conditions,has primary analysis on the impact of environment on the transpiration and carries on the calculation to the tetraploidy locust tree by the single leaf water consumption to the single tree water consumption in CaiJiachuan watershed; Uses fast weighing method to measure and analyze the transpiration water consumption of five different herbs under the tetraploidy black locust forest (Capillary Wormwood,Vanilla,Agropyron Sristatum , Common Sowthistle and Medicago Sativa) in short time, in the same and different growcrop,and calculates the average transpiration water consumption per square metres ;the soil colome weighing method was used for determining diumal variation quantity of soil moisture evaporation, analyzing the dynamic variation and caculating the total quantity of soil evaporation water consumption from May to August ; then 5 kind of suppositions about the types of surface vegetation coverage are proposed in experimented site and the total evapotranspiration water consumption are calculated under 5 suppoitions ,aim at providing preliminary theoretic basis for ascertaining the transpiration water consumption of tetraploidy black locust forest,controling standing forest density and optimizing the forest grass deploy on loess plaeatu of west Shanxi province .
本文以两种不同立地条件下的四倍体刺槐林为研究对象,采用了气孔计法对蔡家川流域生长季内不同天气状况下(典型晴天、阴天和半阴天)四倍体刺槐日蒸腾耗水规律、不同季节(生长季初期、中期和末期)的蒸腾耗水规律、两种不同立地条件下四倍体刺槐蒸腾耗水比较以及影响四倍体刺槐蒸腾耗水的环境因子进行初步研究分析,并对四倍体刺槐由单叶耗水量向单株耗水量进行推算;采用经典快速连续称重法对四倍体刺槐林地生长的主要5种草本植物(白蒿、香青兰、冰草、苦苣和苜蓿)短时段内蒸腾耗水规律、不同生长季内蒸腾耗水规律、同一生长季不同种类草本植物蒸腾耗水量进行了比较分析,并且采用面积与重量比的方法推算出了单位面积四倍体刺槐林地几种主要草本植物平均蒸腾耗水量:采用土柱称重法测定了5月份~8月份土壤水分蒸发昼夜变化量、对试验期内土壤蒸发量动态变化作了分析、推算出了试验地5月份~8月份土壤蒸发耗水总量;对试验地地表植被覆盖类型提出了5种假设,推算出5种假设的情景下蒸散耗水总量,旨在为晋西黄土区四倍体刺槐林蒸腾耗水量的确定、林分密度调控以及林草优化配置等提供初步的理论依据。
- 推荐网络例句
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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.
另一方面,更重要的是由于城市住房是一种异质性产品。
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Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.
气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?