查询词典 block system

Based on rail/wheel reaction and track/bride reaction theory and systems engineering theory, new vehicle-track and vehicle-track-bridge system dynamic models are established and discussed in details, including ballast track model and ballastless track model. The characteristics of the models are:(1) vehicle-track and vehicle-track-bridge system dynamic models are coupled in vertical and lateral;(2) track vibration on bridge is taken in account, track on bridge is considered as one or two layer continuous-point supported rail model, according to actual track structure, interaction between vehicle and bridge transfer from track structure;(3) three type of ballastless track models (tieembanked, elastic-tie-block, slab track) are presented;(4) models reflect the main feature of actual vehicle, track and bridge structure, the response computation frequency of models is relatively broad, which can be applied to analyze both low frequency and high frequency vibration.

基于轮轨相互作用和线桥相互作用特点，本文从系统工程角度出发建立了车辆、有碴轨道和无碴轨道、简支箱梁桥垂向和横向耦合系统动力分析模型，该系统模型具有以下特点：（1）车线、车线桥体系均考虑为垂向、横向耦合振动系统，车线间通过轮轨接触几何关系耦合，轨道与桥梁间通过轨道与梁体间的力与位移协调条件耦合；（2）充分考虑桥上线路在车线桥系统中参振作用，根据桥上线路轨道结构特点将桥上轨道结构模型具体化，即对桥上轨道结构视为多层支承体系，车桥间的动力作用通过轨道结构来传递；（3）建立了三种形式无碴轨道动力分析模型，即长轨枕埋入式、弹性支承块式和轨道板式无碴轨道模型；（4）系统模型详细，分析频带宽，适用范围较广。

The design of the side core_pulling system and the slanted kicking block of the core and the improvement of the feeding gate and kicking system were mainly discussed.

介绍了上壳体注射模的结构，重点介绍了模具侧抽芯、型芯斜顶块设计及进料浇口和顶出机构的改

The goods and materials management system in a railway construction enterprise is taken as an example,to introduce a B/S model,structural component,technique,model block design and plan for management system of goods and materials are realized on the basis of SQL2000database by adopting ASP.NET technology.

NET技术，在SQL2000数据库系统的基础上实现物资管理系统的结构组成、实现技术、模块设计和实现方案。

Confirming of price in the algorithm considers the packet loss rate and the block rate in call admission of variety flow. It can ensure the system QoS performances and improve the utility of the system.

算法中价格的确定以适应各类流的丢包率指标和接入阻塞率指标为基础，得到了可以保证系统QoS性能并且可以提高系统的利用率的价格机制。

The method retains compatibility with existed applications and architectures, and also takes advantage of the block buffer of file system to enhance system performance.

CMDS-MSS是在服务器的文件系统之下、设备驱动程序之上采用虚拟技术实现存储空间的单一逻辑视图的一种方案，它既保持了对现有应用和体系结构的兼容性，同时又可充分利用文件系统的块缓冲区来提高系统的性能。

The automatic control system includes system unit and accessory equipment as well as AD converter, DA converter, memory SCR current convertor, hydraulic valves, pumps, voltage, current and pressure transmitters, switching amount I/O board, top hammer, valve position collector, displacement sensor, hexahedron crown and synthesizing block.

一种六面顶高压合成压机自动控制系统，包括：主机及其附属设备，还有A／D、D／A转换器，存贮器，可控硅变流器，液压阀组、泵组，电压、电流、压力变送器，开关量输出、输入板，顶锤、阀组位置采集器、位移传感器，六面顶，合成块。

The design method of loading control system of derrick car based on ADμC824BS was introduced in this paper, the hardware principle block diagram and software flowchart of the control system were presen- ted.

介绍了以ADμC82 4BS微控制器为核心的起重车载荷控制系统的设计方法，给出了系统硬件原理图和软件流程图。

The static and dynamic characteristics of the beam of a gantry-type machining center are analyzed by means of ADAMS and ANSYS. Considering effect of gravity and cutting forces, the static deformation of the beam is obtained after calculating the interacting forces between the guide and the slide block by ADAMS. Moreover, the contact parameters of the guide surface are acquired by dynamic tests and parameter identification, then they are applied to the simulation model of the beam-slide box system, whose natural frequencies and modal shapes are achieved by modal analysis. Furthermore, the effect of changes of the contact parameters on the dynamic behavior of the beam-slide box system is also investigated.

对一种国产龙门式加工中心的横梁关键部件，采用机械系统多刚体动力学仿真软件ADAMS和有限元分析软件ANSYS进行了静动态特性分析；在考虑重力和切削力作用下，由ADAMS计算出导轨与滑块间的作用力，从而计算出横梁部件的静态变形；通过动态测试和参数辨识方法获得导轨结合面特性参数并将其应用到横梁滑箱系统整体有限元模型中，经过模态分析得到系统固有频率和各阶振型图，并进一步分析了结合面参数变化对横梁滑箱系统整体动态特性的影响。

Rotary servo motor + ball screw up to 2 ~ 5μm, and the requirements of CNC-servo motors - even without coupling gap - thrust bearing - Cooling System - high-precision rolling guide - Nut Block - table closed-loop system as a whole transmission part to lighter, higher precision grating.

旋转伺服电机+滚珠丝杠最高达到2~5μm，且要求CNC-伺服电机-无隙连轴器-止推轴承-冷却系统-高精度滚动导轨-螺母座-工作台闭环整个系统的传动部分要轻量化，光栅精度要高。

Block 40/42 also saw the addition of the APG-68 radar, automatic terrain following, global positioning system, a new positive-pressure breathing system to improve g tolerance for the pilot, full provisions for internal electronic countermeasures, an enhanced envelope gun sight, and a capability for bombing moving ground targets.

第40／42批次还新增了APG-68型雷达，自动地形跟踪装置（是'蓝丁'吊舱系统的一部分），全球定位系统，一种新的用于改善飞行员的抗G能力的加压呼吸系统，全向的内置电子对抗设施，增强的机炮射击外套，以及轰炸地面移动目标的能力。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。