性能

The mathematical models for overall breaking process of circuit breaker are developed, through which the driving mechanism and the arc chamber, the interruption performance and the opening velocity are closely connected, the breaking process under different interrupting conditions are simulated, then the arcing time difference is determined. The interrupting conditions include line charge current, breaker terminal fault current and short line fault current .

本文建立了一种把操动机构与灭弧室相联系、开断性能与运动特性相联系、一维和二维模型相结合的压气式SF6断路器开断性能的仿真方法，对不同开断条件下（包括线路充电电流开断、不同试验方式的端子短路开断、不同试验循环的近区故障）断路器的开断过程进行了分析，用仿真的方法确定了断路器在不同开断条件下能成功开断的燃弧时差，并给出了开断性能与运动特性之间的关系。

The function, performance and manufacturing cost of the lathe are often contradictory, and more than 75% of total cost of the products and performance of the products have already been fixed during the course of designing, so should improve the quality and performance of the products and reduce their cost through improving and designing , and module designing technique is exactly the important means to solve this contradiction.

机床的功能及性能和制造成本往往是矛盾的，而产品的总成本75%以上及产品的性能在设计阶段就已经确定，所以应通过改进设计来提高产品的质量和性能并降低其成本，而模块化设计技术正是解决这一矛盾的重要手段。

The function, performance and manufacturing cost of the lathe are often contradictory, and more than 75% of total cost of the products and performance of the products have already been fixed during the course of designing, so should improve the quality and performance of the products and reduce their cost through improving and designing , and module designing technique is exactly the important means to solve this contradiction.

机床的功能及性能和制造成本往往是矛盾的，而产品的总成本75%以上及产品的性能在设计阶段就已经确定，所以应通过改进设计来提高产品的质量和性能并降低其成本，而模块化设计技术正是解决这1矛盾的重要手段。

In this paper, aiming to solve these problems and meet the developmentrequirement, firstly a series of grafted starch sizing agent with good pasting and excellentsizing performance were synthesized utilizing the cheap mealie starch as the reactants.The denatured starch, polyacrylic size combination, nanometer compound acrylic acidcopolymerization pulp with titanium dioxide, the silicon dioxide has designed a series offormulas. The results showed the polyester size had stable viscosity and excellentfilm-formation property, thus it was a good size for fiber. At last, a kind of mixed sizeswas presented to reach the satisfied results of high density and low viscosity.

本文针对当前浆料存在的问题，结合浆料发展的趋势，立足于廉价的玉米淀粉，开发制备了性能优异的接枝淀粉，该浆料上浆性能优异且退浆容易，是一种能获得较好经济效益和社会效益的绿色浆料；将变性淀粉、丙烯酸乳液聚合浆料、纳米二氧化钛和二氧化硅乳液共聚浆料组合，设计了一系列配方，在对这些配方进行了一系列性能测试的基础上，找到了一种无PVA且价格低廉的组合浆料。

Those novel methods include the determination of damage tolerance ,interface bonding strength,the elastic modulus and bending strength of coatings,nondestructively measuring the local strength of glass,depth-sensing indentation method,and prediction of properties via the residual trail.

介绍了陶瓷、玻璃等脆性材料力学性能评价的一些非常规技术，包括：脆性材料的损伤容限、层状材料和镀膜材料的力学性能和界面强度测试、材料表面局部强度的非破坏性测试，弹性模量和能量耗散能力的估评、残余痕迹预测材料性能等。

The influence of the technological parameters in mild chemical pretreatment process of OCC pulp on the pulp quality was discussed, and the beatability of OCC pulp with suitable chemical pretreatment was also researched in laboratory.

通过对OCC纸浆采用轻度化学预处理时相关工艺参数对浆张物理强度性能影响的研究，得出了适宜的预处理工艺参数，进一步研究了化学预处理过程对OCC纸浆的打浆性能和保水性能的影响。

Mineral substance mixed between the different particle size pellet to inlay pushes the degree mixed to the asphalt the high temperature stable performance influence to be very big, but could front reflect this pushed the degree was mixed the grading curve trend, through 5 different grading curve trend bituminous mixture high temperature performance conducted the research to the standard scope in, was for the purpose of appraising the different grading curve to move towards to mixed the high temperature performance influence, instructed the highway asphalt mixed the second wife design.

矿质混合了中不同粒径颗粒之间的嵌挤程度对沥青混合了的高温稳定性能影响很大，而能反映这一挤嵌程度的是混合料形成的级配曲线走向，通过对规范范围内5种典型矿物混合料形成的5条不同级配曲线的走向对沥青混合料高温性能进行研究，旨在评价不同矿料级配对混合了高温性能的影响，以指导高速公路沥青混合了的继配设计。

ABSTRACT Appling the numerical model and control theory to the state identification of carbon migration in dissimilar metal weldments , its law and quantitative calculation were researched. Based on analysising of metallurgical and dynamics properties of DMWs, the influences of welding procedure's factors on their high-temperature properties were studied in this dissertation. The following are the main contents.

本文将数值化建模和控制理论引入到异种钢焊接接头碳扩散迁移状态辨识，对碳的扩散迁移的规律及定量计算进行了研究，在对异种接头冶金性能和力学性能进行分析的基础上，对焊接工艺因素对接头性能的影响进行了研究，主要内容如下： 1。

This article has studied HG70 steel and HS-70 welding wires weldings,the welded joint,welding quality,and the welding operational performance,in restricts under the welding condition,Uses HS-70 welding wires,Experiments the steel plate the weld joint stretch,degree of hardness and the resilience test result indicated that,HG70 steel and HS-70 welding wires weld joints have the low crack sensitivity,The welding quality is good,Its weld joint has the fine mechanics performance,thus explained they had the fine welding match.

0前言非调质钢具有优良的使用性能和较低的生产成本，受到普遍重视。HG70钢是武钢开发的工程结构用钢，具有强度高、低温韧性好的特点。传统高强度钢一般碳当量较高，焊接性能较差。通过加入微量合金元素、采取新的控轧和调质工艺，使得HG70钢在提高强度的同时，亦保持了较高的韧性和较低的碳当量，因而从理论上讲HG70应具有较好的焊接性能，但HG70钢与HS-70焊丝的匹配情况，还有待于分析验证。

First, the stations'timing process and the slot aligning are discussed. Second, the dissertation propose a resource request random access method based on feedback. The performances of this method are analyzed. Third, proceed from the considerations of the MAC protocol for the HFC system, a QOS-oriental scheduling algorithm for the MAC protocol based on dynamic TDMA is proposed. Simulation results show that the performance of this algorithm is better than that of the first come first service. Forth, two contention resolution algorithms ----p-persistent CRA and tree CRA, which are usually adopted in the HFC system, are summarized. The delay and characteristic are compared. At last, the dissertation introduces the function implementation of the MAC layer based on COM21 UPSTREAMS.

首先，讨论了基站的同步进程和时隙同步的实现；然后，本文提出了一种带反馈模块的资源申请信号随机接入方法，并对其进行性能分析；然后，从HFC系统的MAC协议出发，提出了一种用于基于动态TDMA技术的MAC协议的业务安排算法，计算机仿真结果表明其性能优于先到先服务法的性能；然后概述了常用于HFC系统的两种冲突解决算法——p-坚持冲突解决算法和树型冲突解决算法，比较两者的时延性能与特征；最后，介绍了基于COM21 UPSTREAMS协议的MAC层功能实现，给出了硬件框图和照片。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。