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Concerning model experiment, the authors introduces the methods for the seeking of similarity criterion, the approximative modelling and the verification of model experiment, and practical similarity method is presented for the research of model experiment.

针对模型实验,较详细地介绍了寻求相似准则的方法、近似模化的具体方法和模型实验的验证方法,为今后从事模型实验研究工作提供了实用的相似方法。

In the Sixth Chapter, the Wavelet analysis method is introduced in discussing some acoustic imaging problems related to the physical background of the ultrasonic detection. In the light of the solution of some theoretical problem in the 2D Wavelet transmission of two components form, the enhancement and identification of the spotty and fibriform faults of the acoutic image, along with two acoustic image deblurring methods based respectively on the acoustic physical feature analysis and the acoustic image's spatial feature analysis of the object, are realized. Therefore the image degeneration problem resulting from the acoustic beam diffusion or the acoustic focus diffusion in the ultrasonic detection are effectively improved. The software for this purpose has also been developed.

第六章首次应用小波分析的方法,研究了与超声检测的物理背景有关的一些声象处理问题,在解决了二分量形式的二维小波变换中的一些理论问题的基础上,建立起了对声象中点状和线状缺陷目标的增强与分离方法,以及分别基于目标的声学物理特征分析和基于目标声象空间特征分析的二种声象弥散消除方法,实验分析结果表明,这种方法较好地解决了超声检测中由于声束截面或声焦点扩散所造成的成象退化问题。

Chapter 8: We discuss the acceleration of multigrid by Krylov subspace approaches, and recognize the reason for slow convergence of algebraic multigrid methods is that error reduction is significantly less efficient for some very specific error components which may cause a few eigenvalues of the algebraic multigrid iteration matrix to be considerably closer to 1 than all the rest. However, the eigenvectors belonging to the few isolated eigenvalues can be expected to be typically captured after only a few conjugate gradient iterations, which accelerate algebraic multigrid algorithms. Theoretical analysis and numerical results of some practical problems show the iterant recombination accelerates algebraic multigrid convergence.

第八章:先介绍用Krylov子空间迭代法加速一般多重网格方法收敛的基本框架,然后紧紧抓住引起代数多重网格方法收敛减慢的根本原因往往是误差减小对几个特别的误差分量不明显,这导致代数多重网格方法的迭代矩阵的几个特征值接近于1,而共轭梯度方法则能比较典型地捕捉属于孤立特征值的特征向量,从而推导出有效的共轭梯度加速算法和程序实现,不仅从一些具体的实际应用例子的数值结果去验证迭代复合加速收敛的效果,而且还从理论上分析了预处理共轭梯度法加速代数多重网格法收敛的机理。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran. Then, at the basis of Rao and Bayless's study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法,它们的估计量、估计量的方差及其估计,其中包括有放回PPZ及PPS抽样,不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj,Murthy、Rao-Hartley-Cochran等人的方法;其次,在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上,将总体随机地分成两个子总体,视每个子总体取自不同的线性超总体,在文中,我们利用计算机实现随机分组,并通过画图比较各方法估计量的稳定性,结果表明,对变异系数C.V。

First, this paper gives an introduction of some methods of unequal probability sampling, their estimators and variance estimators, including sampling with pps with replacement, methods of sampling without replacement suggested by Brewer, Durbin, Sampford , Des Raj , Murthy , Rao-Hartley-Cochran.Then, at the basis of Rao and Baylesss study , we consider that population can be splited two random subpopulations, which are respectively drawn from different infinite super-populations, and compare the stabilities of estimators of the methods that given above.

本文首先从理论上介绍了若干种不等概率抽样方法,它们的估计量、估计量的方差及其估计,其中包括有放回PPZ及PPS抽样,不放回不等概率抽样中的Brewer、Durbin、Sampford、Des Raj,Murthy、Rao-Hartley-Cochran等人的方法;其次,在Rao和Bayless两人就样本单元数n=2的情形对上述抽样方法进行比较的基础上,将总体随机地分成两个子总体,视每个子总体取自不同的线性超总体,在文中,我们利用计算机实现随机分组,并通过画图比较各方法估计量的稳定性,结果表明,对变异系数C.V。

Moreover, the actual allele frequency of most varieties deviates far from Hardy-Weinberg equilibrium. All PPB、na 、I、h、Gi and Fst have proved to be the references to elucidate that ISSR is a most powerful tool to analyze genetic diversity, compared with the RAPD marker and the allozyme marker is less strong ordinally. We could divided the 70 samples into A, B, C, D and E five groups using three methods according to genetic distance clustering. There is a bit displacement for few varieties in different clustering maps, but the most are similar to morphological analysis despite that there is still a great difference among cultivars in the same one group. The above results imply that the three methods have the different sensitivity and resolution in genetic distance analysis of close varieties. The Mantel test indicates that the results from the three kinds of markers have the significant correlation, which demonstrates that the number of the used three kinds of markers is enough to exactly detect the diversity of all 70 samples to ideal extent. And these methods can be used to evaluate the diversity of the whole group using the miscellaneous samples instead of the individual sample, of the Gerbera jamesonii are mainly from tissue culture plants. In conclusion, the above study results provide a reference for the application of three kinds of molecular markers to molecular marker-assisted breeding of flower. 2. The genetic diversity among the eight introduced cut-flower varieties of Ranunculus asiatica was analyzed by the ISSR markers. Based on the genetic clustering tree, all the colorful flower varieties are clustered into one group, and the white flower varieties into another group. Moreover, among the former group the yellow flower varieties are clustered into one sub-group, and the reddish flower varieties, such as rose color, pink, nacarat, are clusetered into another sub-group.

由三种分子标记的分析结果可以看出,等位基因平均值、观察杂合度、Fis值、Fit值皆较高,表明非洲菊等位基因较丰富,杂合基因偏多,且绝大部份品种的实际等位基因频率在品种内偏离了Hardy-Weinberg equilibrium;PP8、na、Ⅰ、h、Gi及Fst皆表明,ISSR检测遗传多样性的能力最强,其次是RAPD,等位酶最低;根据遗传距离进行聚类,三种方法都把70个品种分成A、B、C、D、E五个大组,每一组中除少数品种发生位移外,大部份品种分类结果相似,且与形态分析结果有相似性,但在每一组中,品种间的聚类差别较大,表明这三种方法在近距离品种间检测遗传变异时灵敏度及分辨力不同;Mantel检测表明,三种标记的分析结果有显著相关性,表明所用的三种分子方法的标记数量已经可以相对无偏地检测到70个品种间遗传变异;非洲菊为组培苗,三种标记的检测结果皆表明,混合样品可以作为个体样品的代表,对整个居群的遗传多样性进行评价;这些研究结果可为三种分子标记方法在花卉分子辅助育种中的进一步应用提供借鉴。

Methods: Uses the toluidine to 20 example syphilitic blood serum red not to heat up the syphilitic spirochaeta bloopd congeals experiments, the enzyme association immunity adsorption experiments, colloid gold immunity chromatographic analysis law3 plants the different serology method to carry on the contrast examination.

因此,对梅毒的早期诊断及正确地评价治疗疗效,为临床提供准确、及时的依据显得尤为重要。血清学试验是目前国内诊断梅毒的主要方法,其检测方法较多,对每一种方法在梅毒的诊断、治疗和预后等方面的应用价值及相互间关系作比较分析、确定有价值的检测方法,很有必要。

In this paper, the preparations, analytical methods, physical characteristics of ferrates and the application of ferrates in the fields of synthesis of organic compounds, treatment of waste water and the usage as cathode material in alkaline batteries are summarized. The electrochemical preparation of sodium ferrate is described and the relationships between the main parameters in the process are deeply investigated. One method of in-situ electrosynthesizing potassium ferrate of high purity with both high efficiency and low energy consumption is invented. The cyclic voltammogram and feature characterization of iron anode in alkaline solutions is studied. One preparation method of ex-situ electrosynthesizing tripotassium sodium ferrate of high purity is created.

本文概述了高铁化合物的制备方法、分析方法、物理化学性质及其在氧化合成有机物、水处理和用作碱性电池正极材料等领域的应用;深入系统地研究了高铁酸钠的电化学制备及其影响参数之间的关系;研发了一种高效率低能耗直接电合成高纯度高铁酸钾的工艺方法;探讨了铁电极在浓的苛性碱溶液中的循环伏安特征及其极化特征;研发了一种电化学制备高铁酸三钾钠的工艺方法并用多种现代分析测试技术对K_3Na(FeO_4,)_2进行了表征。

Comparison with grain size measured under proper conditions using traditional methods shows that the lase...

将合适条件下测得的软土粒度分布与传统方法得到的结果进行了对比分析,结果表明,激光粒度仪测量的粒径分布范围较广,采集的数据点比传统方法要密,测量的精度要高于传统方法,因此可以用激光法代替传统方法,以快速准确地测得软土的粒度分布。

However, there still leaves much to think about the agent systems'software engineering process and methods. In this field, some valuable and important works have been put forward, such as MaSE, Gaia, MESSAGE/UML, etc. Each of them pays attention to one or several aspects of agent system, but few of them give enough thought to the dynamic properties of agent system's role-based organization. Most of these works begin with analyzing system's static role models and transforming them into agent models, and then succeeding make detail design and later implementation.

需要指出的是,在MAS研究的数十年来,研究人员已经对Agent体系结构、意图理论等进行了深入的研究,但也许是出于对人工智能的偏爱,现有的对多Agent系统开发方法的研究不够深入,尽管已经出现了一些广为人知的软件开发方法,比如MaSE,Gaia,MESSAGE/UML等,但这些方法并没有清晰地给出其所依赖的概念模型;此外,在基于角色的面向Agent开发方法中,往往对角色概念以及角色与Agent的关系没有给出明确而深入的刻画。

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推荐网络例句

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。

There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.

双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。