查询词典 distributed database

Copper Distributed Data Interface is a version of FDDI (Fiber Distributed Data Interface— a 100 million bit per second local area network) that runs on unshielded twisted-pair cabling rather than optical fiber.

铜线分布数据接口是FDDI(光纤分布数据接口，一种100Mbps局域网)的一种版本，传输线路采用非屏蔽双绞线而不是光纤电缆。

College of Guandong Business, Guanzhou 510320, China）Abstract: Since large-scale vertical quench furnace is voluminous, whose working condition is a typically complex process with distributed parameter, nonlinear, multi-inputs/multi-outputs, close coupled variables, etc, dynamically decoupling control algorithm of temperature distributed parameter system in the furnace was presented, by which the whole system was decoupled to several subsystems and the implementation of controller was simplified. With finite difference approximation, the space and time step size was solved to ensure the convergency of finite difference approximation. After decoupling, the subsystems were controlled with self-learning PID control algorithm. The results show that the temperature control precision and homogeneity are improved; the overshoot and process in temperature rising period are reduced simultaneity.

摘 要：针对大型立式淬火炉体积庞大，工况复杂，炉内温度分布呈本征非均匀性，具有多输入/多输出、非线性、强耦合等特性，难以实现炉内温度高精度高均匀性控制目标等问题，提出一种温度分布参数系统动态解耦控制算法，其原理是：采用有限维逼近方法将对象解耦为多个独立的子系统，简化控制器的实现过程；通过分析有限维逼近方法的收敛性，获得保证收敛性的空间和时间步长应满足的条件；解耦后的子系统采用自学习PID控制算法，实现炉内温度高精度和高均匀性控制以及升温过程的快速性和小超调。

At first ,this paper introduces the characteristic of distributed software process and distributed software enginerring frame work.

我们首先给出了分布式团队开发过程的特点和分布式团队开发的整体框架。

The four well-known skeleton hydro-power stations of West-East Electricity Transmission Project, named Xiangjiaba, Xiluodu, Baihetan and Wudongde from the lower reaches of Jinshajiang River to upriver reaches, are all distributed in this area. Based on the analysis of the resource exploitation and industry sustainable development status, current problems and future scenarios, the main conclusions go as follows:(1) There are abundant and varied agricultural resources, widely distributed mineral resources with valuable predominant minerals, potential tourism resources, but some main problems such as lower level of exploration and development, serious waste and pollution, restraints of financing and transportation and eco-environmental frangibility still call for immediate solution;(2) Regional economy develops fast but the overall level is low-farming and animal husbandry industries, In which crop-plantation takes the main part, dominates in the sectional structure of economy, and forestry and specialty industries need to be further developed. The existed restraints such as unbalanced structural and regional economic distribution, acute structural deficiency and low economic efficiency need to be cleared out, of the way to a sustainable future.

西电东送骨干工程的向家坝、溪洛渡、白鹤滩、乌东德四大水电站均分布在这一江段通过对该区域资源开发和产业发展的现状、问题和发展前景进行分析，得到如下主要结论：(1)该区域农业资源丰富多样，矿产资源分布广泛且优势矿种地位突出，旅游资源待开发潜力巨大，但是资源开发却面临着勘探开发程度不够、浪费污染严重、资金交通制约和生态环境脆弱等几大问题；(2)区域产业经济发展迅速但总体水平低，部门结构中以种植业为主的农牧业占主导，林牧业和特色产业有待进一步开发，产业发展面临着部类和区域不均衡、结构矛盾突出以及效益低下等问题的困扰。

The protrutive relation was set to reestablished the articulation. The geometry model constructed in CAD software was put into MSC.PATRAN to set the concrete Three-dimensional Finite Element Model. Result revealed (1) Tensile stress distributed in the posterior-upper area; molar area.(2) Compressive stress distributed in the opsile molar area and gonion area .

本研究通过模拟下颌前伸时，对下颌骨骨组织应力变化进行三维有限元分析[3 ，8] ，了解下颌骨骨组织应力分布特点，为临床矫形治疗提供理论依据。1 材料与方法1.1 建立几何模型1.1.1 病例选择选择一名年龄 12岁的男孩，X线手腕骨片显示处于生长发育高峰前期，全身发育正常。

Net-centric warfare system is a distributed real-time system that has characteristics of independence, heterogeneousness, adaptability and synergetic, it is a great challenge to traditional distributed real-time computation.

在该网络中，各作战单元将在高速和连续的基础上共享大量的关键信息，将会大大提高海军作战的反应速度、精度和有效性。网络中心战系统是一个分布式实时系统，具有动态性、异构性、适应性和协同性，对传统的分布实时计算技术提出了巨大的挑战。

The theoretical analyses and simulations show that the generated chaotic sequences are uniformly distributed and the two-valued key stream is independently and identically distributed.

理论分析和仿真检验均证实，该方法所产生的混沌序列为均匀分布序列，二值密钥流序列为独立同分布序列。

We put forward a mixed protocol trust model, which combines hierarchy structure and distributed trust structure. There is a hierarchy trust structure among authentication organization, bank, merchant and intermediator, but there is a distributed trust structure among customers.

基于该模型，提出了一种层次结构和分布式信任结构相结合的混合型协议信任模型，认证机构与银行、商家和第三方采用层次型的信任关系，用户之间则采用分布式的信任关系。

First, it begins with the study of the centralized CFAR detection with multiple sensors. The non-CFAR problem is analyzed; the necessity for local CFAR processing is established. The effective local CFAR processing scheme is proposed, i.e. the local test statistic. The upper limit of the optimal performance is proved for the distributed CFAR detection based on LTS. Then, the new schemes based on LTS are analyzed in condition of signal pulse, and then the analysis is expanded to the case of multiple pulses. Next, the feedback mechanism is introduced. At last, the invariant test is used to reveal the essence of CFAR processing. It explains the necessity of local CFAR processing in the distributed CFAR detection at a higher level.

本文深入研究了这方面的问题，首先从多传感器集中式 CFAR 检测入手，分析其存在的非 CFAR 问题，论述局部 CFAR 处理的必要性，提出有效的局部 CFAR 处理方法：局部检测统计量，证明基于局部检测统计量的分布式 CFAR 检测的最优性能上限，分析基于局部检测统计量的新方案在单脉冲条件下的性能，并且进一步拓展到多脉冲非相干积累的情况，然后引入反馈机制，最后利用不变检验的概念揭示 CFAR 处理的机理，从更高的层次上解释分布式 CFAR 检测做局部 CFAR 处理的必要性。

Further more, the thesis lucubrates some key techniques: aiming at the management of the distributed objects, we skillfully construct the isomorphic project object tree for the real projects structure by using the CORBA naming service, and laconically and effectively implement the management of the services and modules by using the location service. And we also propose a design which uses CORBA event service and Borland MIDAS to implement the distributed data service in a creative way and analyze the advantages and disadvantages of this design at the same time.

并针对一些关键技术做了深入的讨论和分析，例如针对整个系统的分布式对象的管理，巧妙地借用CORBA的名字服务构造了同构于实际工程组织的工程对象树，同时使用定位服务简洁而有效的实现了对服务和模块的管理；针对分布式数据库的实现，创造性地提出了一种使用CORBA事件服务和Borland MIDAS组件来实现分布式数据服务的设计，并实现了这个设计，同时分析了这种设计的优劣。

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