查询词典 distributed data base

Thirdly, it analyzes and studies in detail Surpac mechanism and the relevant concepts on constructing the model of mineral deposits and mining engineering systems according to the modeling procedure and the actual conditions of Jinchuan"s mines. Based on these:Lit points out some differences between the western countries and China in the practice of the geological data record, explores the inputting data on computers performed by more people at the same time and the method to improve constructing the data-base and finished the data-base of Jinchuan mineral deposits;2.It puts forward the steps and flow chart to construct the solid model and brings forward the scheme of "first individual then whole to set up Jinchuan mineral deposits geological model, summarizes some experiences for constructing the complicated geological ore body of the high accuracy: add control lines, add auxiliary demarcation lines +control lines, the operation of intersection, cross and incorporation between solid bodies and plane and section combination. The above-mentioned methods applied to construct the mineral deposits solid models of four mine areas in Jinchuan; 3.lt studies and presents the detailed flow chart of constructing block and grade model, analyses the workable scheme in setting up the block and grade model of main ore body for Jinchuan mineral deposits and also sets it up.

接着，按建模流程并结合公司矿山实情，详细研究、分析了Surpac构造矿床模型和采矿工程系统模型的机理、有关概念，在此基础上：(1)指出了西方国家与我国在地质数据记录习惯方面存在的一些差异，探索出多人多机同时录入、提高建库效率的方法，建立了金川矿床地质数据库；(2)研究并提出了构造实体模型的步骤和流程图及&先分后整&建立金川矿床地质体实体模型方案，总结出建立高精度复杂地质体模型几点经验：添加控制线法、添加辅助分界线+控制线法、实体间的交、叉、并运算法及平剖面图联合法，建立了金川矿床四个矿区主矿体的实体模型；(3)研究并提出了建立块模型、品位模型详细流程图，分析了建立金川矿床主矿体块模型和品位模型的可行方案，建立了金川矿床主矿体的块模型和品位模型。

Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.

全文论述的内容主要有下列几个方面：(1)较为系统地阐述了CAD／CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程，在分析工艺设计过程的基础上，提出了基于特征原型的渐进式工艺设计方法，并探讨了该方法的应用前景；(2)研究了零件特征提取的原则和方法，在成组技术的基础上，开发了一套基于特征的分类编码系统，并在提取零件特征的基础上，定义了零件特征的数据模型，开发了基于轴类零件特征的参数化设计系统；(3)研究了基于特征的CAD／CAPP集成的方法，通过定义零件特征数据模型的存储结构，开发了将设计数据转换到工艺数据库中的接口程序，为后续的CAPP系统提供必要的零件形状和工艺信息；(4)研究了基于特征的工艺推理方法，将Mycin算法应用到工艺决策中，开发了基于特征的工艺推理及工艺方案生成系统，在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺；(5)介绍了整个HOPE系统的总体结构，通过运行HOPE系统绘出了一轴类零件的零件图，并生成了该零件的加工工艺方案，初步探讨了基于特征的工序图生成技术中数据处理问题；(6)研究了工艺设计过程中知识如何有效表示的问题，提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法，并利用BP算法进行了工艺知识表示的初步研究；(7)研究了工艺设计过程中同一安装下工步优化排序问题，利用神经网络中基于模拟退火的理论来解决该工步优化排序问题，实践证明该方法较传统的算法具有更高的效率；(8)总结了本文所进行的研究工作，为今后进一步开展工作提出了较为合理的建议。

And it must be concretely analyzed what degree of angular correlation the distributed source from can be equivalent to an independent distributed source or a coherent distributed source.

在此基础上，将该模型由瑞利信道条件推广到莱斯信道条件，给出了莱斯信道的分布源模型描述与克劳限的计算公式。

Distributed interactive simulation technology has developed for decades andapplied to diverse industries. It is now enhanced with the development of computerhardware and network technology, and also modeling technology, virtual realitytechnology, software technology, and so on. On the other hand, people are bringingforward more and more requirements on distributed interactive simulation applications.Supports of distributed simulation systems are required on applications that involves inmassive complex simulation environment and large quantity of simulation nodes andentity objects, such as military simulation, online games. These requirements ask forhigh scalability of simulation support platform.

随着计算机硬件和网络性能的显著提高，现代建模技术、虚拟现实技术和软件技术等技术的发展，给已经发展了几十年的、深入各行各业的分布式交互仿真注入了新的内容和活力；而在另一方面，随着社会的进步，人们对分布式交互仿真的需求也越来越广泛，要求也越来越高，特别是在军事仿真、网络游戏等领域涉及到大规模仿真环境和大量仿真节点及实体的应用，需要分布式交互仿真系统的支持，这就对仿真支撑平台的可扩性提出了较高的要求。

Namely,spinous setae mainly distributed on the legs of Cybister bengalensis,acetabula setae distributed on the legs of male Cybister bengalensis,and bunchy setae only distributed on the nick points of the pronotum and the elytra.

采用体视显微镜、扫描电镜技术观察并描述了黄缘真龙虱体壁表面各部位的形态结构特征，发现了3种典型的凹陷和普遍存在的凸起，了解了其三维结构，分析了凹陷与龙虱水生生活的关系。

The new vehicle was designated Tun Anticar pe Afet Mobil T-60 (Self-propelled Gun on Mobile Carriage T-60) or TACAM T-60. The project was accepted and twenty-three serviceable T-60 tanks were sent to Leonida Works in Bucharest. On 12 January 1943 the prototype was completed and other eleven T-60s were sent for conversion. In late June, the first seventeen TACAMs were distributed to the Mechanised Training Centre and to the 1st Tank Regiment for evaluation and training. The other seventeen TACAMs were assembled by the end of 1943. Sixteen TACAM T-60 were distributed to the 1st Tank Regiment and formed the 61st Tank-destroyer Company and eighteen TACAM T-60 were distributed to the 2nd Tank Regiment where they formed the 62nd Tank-destroyer Company.

这种新设计方案很快得到罗军总参谋部的批准，第一批23辆罗马尼亚军队捕获的还可以行使的苏制T-60坦克很快被送到布加勒斯特莱奥纳德兵工厂。1943年2月12日，该车原型车被制造出来，这种新兵器被罗马尼亚总参谋部命名为T-60型自行火炮，简称TACAM T-60，第一批样车共12辆于1943年年初开始进行各种测试，到1943年6月，第一批17辆TACAM T-60被交付军方，这些车辆被分配给罗马尼亚机械化部队训练中心和第一坦克团进行实战评估和训练。1943年年底又生产出第二批17辆TACAM T-60自行火炮，这样在1943年底罗马尼亚军队共有34辆TACAM T-60自行火炮，其中16辆被分配给第一坦克团组建为第61坦克歼击连，另18辆被分配给第二坦克团组建了第62坦克歼击连。

This thesis mainly discuss following issues, Theory and simple expressions for array covariance matrixes are derived when angular spread functions are symmetric distribution functions, i. e. the Uniform distribution, the Gauss distribution, the Laplace distribution and the Von Mises distribution, and a non-symmetric distribution function, i. e. the Gamma distribution. And the relation between the effective signal subspace and the array number, or and the nominal angle of the distributed source, the angular spread, the distributed functions, and the Signal-to-Noise Ratio is gained. The dimension of the effective signal subspace increases with increment of the array number. And it is more obvious to the non-symmetric distribution. The dimension of the effective signal subspace decreases with increment of the nominal angle. And the distributed source is equal to a point source as θ=π/2. The dimension of the effective signal subspace increases with increment of the angular spread.

本论文针对阵列信号处理中广泛存在的分布源现象，主要讨论了以下问题：推导了角度分布函数分别为对称的均匀分布、高斯分布、拉普拉斯分布、Von Mises分布和非对称的伽马分布时，分布源阵列接收信号协方差阵的严格模型和简化模型，得到了单个分布源的有效信号子空间随阵元数、分布源中心角、分布角、角度分布函数和信噪比的变化规律：随着阵元数的增加，对所有角度分布函数的有效信号子空间维数也随着增加，且非对称分布函数的有效信号子空间充满整个空间的可能性更大；随着分布源中心角逐步增加，有效信号子空间维数逐步减小，当θ=π/2时，等价于点源情形；随着分布源分布角逐渐加大，有效信号子空间维数也随之增加，直到有效信号子空间充满整个空间；随着信噪比的增加，有效信号子空间维数有一定程度的减少。

It proposes some feasible schemes to build up the distributed geographic information system, and adopts the concrete implement technology to probe and attempt to develop the advanced distributed GIS in order to supply some refers to man-sized distributed GIS research and the building on computer network environment.

为分布式地理信息系统提出了一些可行的方案，并使用具体的实现技术为研制新的分布式GIS进行了探索和尝试，为今后在网络环境下大型分布式GIS的研究和建设提供一些参考意见。

Computer simulations validate the performance of these algorithms. And the model error of low order approximation distributed sources model, spatial frequency distributed sources model and Jocabi-Anger series expansion distributed sources model are discussed.

通过计算机仿真，验证了低阶近似分布源模型方位估计算法的性能，并且研究了分布源的低阶近似模型、空间频率模型和低阶Jacobi-Anger级数展开模型的模型误差。

ERK positive cell mainly distributed at nucleus of solitary tract, ambigous nucleus, and positive fibers and cells mainly distributed at medullary visceral zone, nucleus of solitary tract and ambigus nucleus. These positive cells formed an isolated zone from nucleus of solitary tract via medullary visceral zone to SP5, which could be seen using immunohistochemical stain. Positive cells and fibers also distributed at the projection from pneumogastric nerve to the stem.

免疫组织学染色可见，阳性细胞主要分布于延髓内脏带的孤束核和疑核、阳性纤维伴随阳性细胞分布于延髓内脏带的孤束核区和疑核、呈沿孤束核经延髓内脏带至三叉神经脊束核的弧行带；在迷走神经向脑干投射部位也可见阳性胞体和纤维的分布。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了