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It also Introduces three optimum techniques for the machine model;manually removing redundant information;carrying out optimization with some softwares and algorithm and according to the change of link motion coordinate and angle,puts forward the change of link s coordinate realized by coordinate system nesting,and the change of link s angle realized by relative to driving link s ...

研究了手工清除冗余信息、利用软件优化和利用算法优化三种模型优化技术。根据机构的运动就是坐标和角度的变化，提出了坐标系统嵌套实现构件坐标的变化，用相对于原动件的角度关系实现角度变化的仿真方法。为工程技术人员解决此类问题提供了一种参考途径。

Once more, applys three-dimensional CAD software Pro/Engineer establishing the geometry models of all kinds of parts in the crank link mechanism, then useing the Pro/E software assembling function assembles the components of crank link into the piston module, the connecting rod module and the crank module, then using Pro/E software mechanism analysis module (Pro/Mechanism), establishes the multi-rigid dynamics model of the crank link, and carries on the kinematics analysis and the dynamics analysis simulation, and it studies the piston and the connecting rod movement rule as well as crank link motion gear movement envelopment. The analysis of simulation results shows that those simulation results are meet to true working state of engine.

再次，应用三维CAD软件：Pro/Engineer建立了曲柄连杆机构各零部件的几何模型，在此工作的基础上，利用Pro/E软件的装配功能，将曲柄连杆机构的各组成零件装配成活塞组件、连杆组件和曲轴组件，然后利用Pro/E软件的机构分析模块(Pro/Mechanism)，建立曲柄连杆机构的多刚体动力学模型，进行运动学分析和动力学分析模拟，研究了在不考虑外力作用并使曲轴保持匀速转动的情况下，活塞和连杆的运动规律以及曲柄连杆机构的运动包络。

In the proposed device to remedy the defect that overhigh withstand voltage of thyristors used in converter are needed due to the overhigh DC link voltage, a method to control DC link voltage is put forward, that is, a special control logic for full-controllable switching elements is designed to make them equivalent to half-controllable switching elements which are naturally turned on and turned off by triggering, then connecting such a half-controllable switching element in series with DC link the defect of overhigh DC link voltage is effectively solved.

为了克服该装置直流母线电压过高，因而对逆变器开关管耐压要求过高的缺点，提出一种对直流母线电压进行控制的方法。对全控型开关器件设计一种特殊的控制逻辑，使其等效为一个自然导通、触发关断的半控型开关器件，将该半控型开关串联在直流母线上，有效解决了直流母线电压过高的问题。

Each hydraulic link of 6-DOF parallel robot is treated as an open joint-link chain. Each link's local coordinate frames is established according to the position and orientation of the component of the spatial mechanism. The stiffness and damping matrices of the link are transformed into the static gross coordinate frame through transfer matrix described by the RPY description method. The differential equation of motion of the system vibration is derived.

将6-DOF并联机器人的液压分支作为假想的单开链，由空间机构的位姿建立其组成构件的局部坐标系，并利用RPY角描述方法，通过转移矩阵将各构件的刚度及阻尼矩阵依次转移到固定坐标系中，得到了系统振动的运动微分方程。

Third should be noted that, with the Shanghai Urban Construction, and the whole process to expand rapidly, we find that Central has been a lot of plot and central urban area to enjoy the same market treatment, that is, said that if in accordance with the Inner Ring to determine likely this situation will disappear, to separate the role of Central Link in strengthening the future, may be opened in the Link, but Link with many special sections, and the Inner Ring of them the ordinary price of the lot may be will be separated, so that we can explain the Central Link which is now the emergence of a large number of more than 9000 pieces, nearly 10,000 of the sale price, there is a product itself, a good product is always in support of our prices.

第三方应当指出的是，与上海城市建设，整个过程迅速扩大，我们发现，中央一直是很多情节和中部城市地区享有同样的市场待遇，那就是，他说，如果按照内环，以确定这种情况可能会消失，分开的作用的中心环节加强未来，可能是打开了该链接，但链接有许多特殊的部分，以及内环线，其中普通价格该地段可将分离，以使我们能够解释的中心环节，而现在出现了大量的超过9000件，将近一万个的销售价格，有一个产品，一个好产品永远是支持我们的价格。

Tolerance analysis aims to explore the effection of divided link on sum link, namely how to ascertain the assembled sum link"s tolerance if knowing all divided link"s dimension, tolerance and distribution parameter.

公差分析研究组成环对封闭环的影响，即已知各组成环的尺寸、公差及分布参数，确定最终装配后的封闭环公差。

The service provided by the community allows for the creation and deletion of the following resources inside a layer network domain: subnetwork, link, topological link, link end, topological link end and access group.

由这个群体提供的服务为创建和删除下列层网域内的资源提供了方便：子网、链路、拓扑链路、链路终点、拓扑链路终点和接入群。

As a particular case, in a parallelogram linkage, where the length of the input link equals that of the output link and the lengths of the coupler and the ground link are also the same, both the input and output link many rotate entirely around or switch into a crossed configuration called an antiparallelogram linkage.

作为一个特例，某些平行四连杆的输入杆的长度等于输出杆的长度，连杆的长度和固定杆的长度也相等，输入杆和输出杆都可以作整周转动或者转换成称为反平行四边机构的交叉结构。

This paper studied the effects of using of link information for Web IR in TREC experiment,including link anchor text,link structure and the combination of link-based retrieval and traditional content-based retrieval.

摘要］ 本文通过TREC实验研究基于链接信息的检索对Web信息检索的影响，包括使用链接描述文本，链接结构以及将基于链接的方法和传统基于内容检索的方法合并。

In order to avoid bottleneck links, a new concept, the link balance weight, is defined, which is used to reflect the link usage. The larger value is given to the link with heavy load, and the less value is given to the link with light load.

在选路时为了避免瓶颈链路，本文创造性地提出了一种新的&链路均衡权值&概念，即根据链路的带宽使用情况为链路赋权值，负载重的链路赋较大的权值，负载轻的赋较小权值。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。