查询词典 material control

The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.

文中对汽车碰撞安全性的设计理论和方法进行了归类和总结，其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等；重点介绍了碰撞有限元法的基本理论和有关算法，涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等，探讨了有限元计算中的材料模型参数获取技术，开发了相应的材料试验装置及材料模型参数反求软件，在此基础上进行了基本的碰撞仿真算例和试验对比研究；文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性，指出了设计薄壁吸能构件时需要考虑的几个主要影响因素，即焊点、壁厚、横截面和预变形等；在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究，提出了吸能转向机构和自适应安全气囊的仿真研究方法；文中最后探讨了整车碰撞性能的设计与改进方法，提出了以理想碰撞特性为目标，采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法，并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究，所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车，研究结果表明，本文所提出的设计与改进方法是适用而有效的，具有重要的工程实用意义和价值。

The germination, expansion and reciprocity of the crack inside the material embody on the crystal bound of the material. So, in this study we can change the bourgeon and extend condition of the tiny crack inside the material by design and control the crystal interface structure effectively and provide new research approach for the design and manufacture of the machinability ceramic.

由于材料的破坏和加工都决定于材料内部微裂纹生成的难易程度和扩展程度，而材料内部裂纹的萌发、扩展和相互作用集中表现在材料的晶界和相界面上；因此，本研究通过有效的设计和控制界面结构，改变材料内部微裂纹的萌生和扩展条件，为可加工陶瓷的设计和制备提供新的研究途径。

A control method of synchronously material downloading and periodic error compensation is adopted in the material blending system to improve the precision of the material blending procedure.

在微机配料系统中采用了同步下料、周期补差的控制方法，提高了水泥配料的精确性。

The classical cutting stock algorithm——column generation technology , and wrap up rectangle technology for abnormity are analyzed ; The development of AutoCAD with ObjectARX is studied and the generating method of cutting outline drawing and layout drawing were found out on the basis of analyses of the graph database structure of AutoCAD and the basic operation of it ; The process planning technology of plate material cutting orienting numerical control is studied a process planning method directly based on layout drawing is established ; The emulation technology in AutoCAD is studied and a kind of dynamic emulation method is put forward , which is realized by incrementally modifying graph entity ; The postposition of NC program of the integrated cutting system constructed on software plug-in is proposed , which can effectively solve the problem that it is difficult for a numerical control programming system to be common , which is caused by the difference of instruction format and control parameter between different type of numerical control machine .

分析了经典的矩形件优化排样算法——列生成法和针对异形件的矩形包络算法；研究了基于ObjectARX 的AutoCAD 开发技术，结合对AutoCAD 图形数据库结构及其基本操作的分析，给出了下料轮廓图和排样图的生成方法；研究了板材数控下料加工的工艺处理技术，建立了一种直接基于排样图进行的图形交互工艺规划方法；研究了在AutoCAD环境中的板材下料数控仿真技术，给出一种通过增量修改图形实体对象实现的动态仿真方法；提出以软插件技术构建集成下料系统的数控编程后置处理部分，能够有效解决因数控下料机床指令格式及控制参数不统一导致的自动编程软件系统不易实现通用性的问题。

First of all, the improving feeding helix can not only get material into the ball mill successfully, but also increase ventilated proportion; Secondly ,making use of all sorts of new scaleboards can reform the working condition of skive substance and raise the material adaptability; Third, separating storehouse board, have not only increased control material to flow, and balanced each storehouse smash the function of ability, but also realize thickness pellet grade role; Grind tail storehouse choose hyperboloid drum liner, in axial and circumference direction have incline curved surface, can not only increase steel ball lateral grade , but also still raise steel forge , steel ball grind efficiency.

进料口螺旋的改进，不仅解决了堵料现象，而且加大了通风面积；各种新型衬板的使用，对研磨体运动状态的调节以及对物料的适应性都有了较大的改善；隔仓板不仅增加了控制料流及平衡各仓粉碎能力的功能，而且可以实现粗细颗粒的分级作用；磨机尾仓选用双曲面衬板，在轴向和圆周方向均有倾斜曲面，不仅能够增加钢球的横向分级，还能提高钢锻、钢球的研磨效率。

As the brittleness of low-k material,the traditional wire bonding parameter often lead to die pad crack or Au-AL matter bad;after used low-k material,die size,die pad opening and die pad pitch change to more little,wire change to lengther and density change to more higher,it\' s new challenge for molding and wire bonding;at the same time, low-k material also require to control the thermal stress in package.

由于低介电常数材料的脆性，传统的引线压焊参数设置将会导致焊盘碎裂以及金铝化合物不良；由于使用低介电常数材料后，芯片尺寸、压焊区域和压焊间距进一步减小，金线压焊长度和密度大大增加，这就为压焊和模塑提出了新的要求；同样由于低介电常数材料的应用，对封装体内部的热应力的控制也提出了更高的要求。

Through the material conformity and the flow specialized management, to the material purchase, the examination, the storage, the storehouse, the transportation and so on each link carries on the strict management and the control, first reduced the project cost, second has solved the material quality, the environmental protection question from the source, avoided taking substandard products as fine products, impersonates the real phenomenon.therefore asks you not to need to worry its product the quality question, moreover industry the peak company will ask the expert to help you to examine the air quality question, if the environmental protection will be unqualified, industry the peak company will meet the sum total to refund money!

通过材料的整合和流程的专业管理，对材料的采购、检验、储存、出库、运输等各个环节进行严格管理和控制，第一降低了工程的成本，第二从源头上解决了材料的质量、环保问题，避免了以次充好、以假充真的现象。所以请你不必担心其产品的质量问题，而且业之峰公司会请专家来帮你检测空气质量问题，如果环保不合格的话，业之峰公司会全额退款的！祝你装修愉快，装一个好家，享受一生的幸福！

Based on the RFID technology's air materials management system management system, through the RFID technology, the computer information technology, the networking and so on many technologies, builds the air materials company unified information platform, can realize the Airline various Functional departments's information sharing, the service conformity; Through the RFID technology, the monitoring technology, the entrance guard technology, realize to the air materials warehouse personnel and the cargo digitized management, comes in and goes out the management including the personnel, the cargo leaves the warehousing management, the automatic audit treasury or ware house, the storehouse position automatic assignment, the visualization warehousing management, consumes the material fine refinement management, when the long-lived management, the application course track; Realizes reasonably to the air materials, scientific, the highly effective management function, and had guaranteed the air materials manages each link information acquisition the speed and the accuracy, guaranteed that the Airline grasps the air material inventory accurately promptly the real data, maintains with reasonably the control air material inventory situation.

基于RFID技术的航材管理系统，通过RFID技术、计算机信息技术、网络技术等多项技术，建立航材公司统一的信息平台，能够实现航空公司各职能部门的信息共享，业务整合；通过RFID技术、监控技术、门禁技术，实现对航材仓库人员及货物的数字化管理，包括人员出入管理，货物出入库管理、自动盘库、库位自动分配、可视化仓储管理、耗材精细化管理、时寿件管理、应用历程跟踪；实现对航材合理、科学、高效的管理功能，并且保证了航材管理各个环节信息采集的速度和准确性，确保航空公司及时准确地掌握航材库存的真实数据，合理保持和控制航材库存情况。

This paper firstly analyzes its reason, some main control ways, then come to the writer's view that we should make full use of supervision's experience on technique and management, control effetely from beginning, on-going, and end of project, and control from material, construction method , and give help to the contractor both on technique and finance. The writer's discussion basing on supervision control theory, detail introduces some quality control methods.

本文着重分析了在大体积混凝土工程中裂缝产生的原因，并指出易发生问题的几个关键环节，认为单一依靠承包单位的管理是不能保障这个关键分项工程的顺利实施，提出应当充分发挥监理企业在技术上和管理上积累的经验，从施工准备阶段入手，在事前、事中和事后等环节采取有效的控制措施，特别是对原材料严加控制，对施工方案认真审核，对关键的控制环节措施到位，从技术上、经济上帮助承包单位确定合理的施工方案，防止温度裂缝给工程带来的隐患，确保大体积混凝土的施工正常有序的进行。

After feeding, the volume of material roll of a central location that is, the business card printing and membership card making location, because this machine is affixed with a deviation, version, and so on are in sub-subparagraph to the central axis as the base, the material should be in strict accordance with our equipment for each feed routes through the guide roller is, put to paper machine for printing paper smooth and adjust the tension and cause to be printed materials subject to certain harmoning tension control in order to ensure the rectification of overprinter precision, adjustment, so that the material in the press and printing center position, to ensure that the rectification action ofsmell is correct.

上料卷之后，料卷的中心位置也就是制卡和会员卡制作位置，因为贴版纠偏、模切、分节等都是以中心轴为基准的，被印材料应严格按照本台设备的送纸路线穿过各个导纸辊、穿纸后可开动机器让被印材料送纸平稳，调节张力，使被印材料受到一定的平稳张力控制，才能保证套印精度、调整纠偏，使材料在印机及印版中间位置，以确保纠偏动作的灵敏无误。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。