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Pakistan Air Chief Marshal Tanvir Mahmood Ahmad said that 36 high-tech combat aircraft (CF-20) would be part of the Pakistan Air Force fleet by 2010, Pakistan media reported Thursday. He said the aircraft are from China and would provide a new punch to the air force when answering questions from media.

据巴基斯坦媒体20日报道,巴空军参谋长坦维尔上将在接受媒体采访时称,巴空军2010年之前将从中国引进36架CF-20(中国称歼10)高科技战机,这种由中国研制的战机将为巴空军带来新的动力。

Police college students, the probationary police, are an important component of police force and the vital new force to construct a safe society in the future.

警察院校学生是预备警官,是人民警察的重要组成部分,是未来建设平安社会的生力军。

The new technology makes the sucker rod string downwards easily by applying a downward hydraulic force at the bottom of the hollow sucker rod string, which effectively solves the problem of large drag force on the downstroke in the present technology of this kind.

介绍了一种新型空心杆采油工艺技术,这种技术采用了具有液力反馈原理的空心杆抽油泵,该泵的特点是能有效地减小空心杆的下行阻力,并能增加抽油杆的下行动力。

In the test model, a new type joint connection of one-way hinge is put forward for achieving pure-hinge connection; In the shape forming test, because of the little post-tensioning forces, a new type loading method of twisting nut for drawing wire is put forward in stead of jack tensioning for solving the questions, such as super-tensioning and the nonuniform rate of loading; In the loadtest, a new type vertical loading system of multiple-point fixed pulley is put forward for solving the questions, such as more loading points and larger vertical force at one loading point.

试验模型中,为了实现纯铰接连接,提出了一种新型的单向铰节点连接形式;成形试验中,由于后张拉力较小,提出了一种新型拧螺母抽钢丝的加载方法,很好的解决了千斤顶易超张拉和加载速率不均匀等问题;承载力试验中,为了解决加载点较多、单点加载较大的问题,提出了一种新型多点定滑轮竖向加载系统。

In the test model, a new type joint connection of one-way hinge is put forward for achieving pure-hinge connection; In the shape forming test, because of the little post-tensioning forces, a new type loading method of twisting nut for drawing wire is put forward in stead of jack tensioning for solving the questions, such as super-tensioning and the nonuniform rate of loading; In the load test, a new type vertical loading system of multiple-point fixed pulley is put forward for solving the questions, such as more loading points and larger vertical force at one loading point.

试验模型中,为了实现纯铰接连接,提出了一种新型的单向铰节点连接形式;成形试验中,由于后张拉力较小,提出了一种新型拧螺母抽钢丝的加载方法,很好的解决了千斤顶易超张拉和加载速率不均匀等问题;承载力试验中,为了解决加载点较多、单点加载较大的问题,提出了一种新型多点定滑轮竖向加载系统。

New multi—objectives function (including mill stand longitudinal stiffness, distribution coefficient of loaded pressure between rolls, weight of mill stand, rolling power, rolls loaded gap profile changeability of bending force, transverse mill stand stiffness of bending force, transverse mill stand stiffness of rolling load) multi—constraints (including rolls strength, spindle strength, backup roll bearing load, minimum rollable gauge, roll surface temperature rise) rolls system parameters optimization model of four—high cold strip mill is established, and programme for mill structural illustration creation on the platform of AutoCad designs is compiled. With this as basis, rolls system parameters of Yichang thin strip corporation's 1219 cold mill are calculated using SUMT (subsequent unconstrained minimization technology).

本文建立了以板形和板凸度控制特性为目标的四辊轧机多目标函数(包括轧机纵向刚度、辊间压力分布系数、轧机重量、功率、弯辊力对轧机辊缝形状改变能力、对弯辊力的横向刚度、对轧制力的横向刚度)、多约束条件(包括轧辊强度、接轴强度、支承辊轴承负荷、最小可轧厚度、轧辊温升等)的辊系参数优化模型,以此模型为基础,利用惩罚函数法计算了益昌薄板公司1219冷轧机辊系参数,编制了AutoCAD平台下的轧机结构示意图自动图形软件。

The elastic stiffness matrix of this new model is 14×14. The effect of axial force, shearing force, biaxial bending moment and bimoment was involved in the geometrical stiffness matrix of element.

该模型的弹性刚度矩阵为14×14矩阵,几何刚度矩阵中考虑了轴力、剪力、双向弯矩和双力矩效应。

Based on the time history analysis performed on three kinds of high-rise block masonry structures (10-story, 15-story, 18-story structures respectively) and the study on the inertia force distribution of the structures, a new pattern of lateral force distribution, namely parabolic distribution pattern, is presented here.

对3种不同中高层砌块砌体结构(分别为10层、15层和18层砌块砌体结构)进行大量时程分析,对结构的惯性力分布进行研究,提出一种新的适用于中高层砌块砌体结构Pushover分析的侧向力分布模式-抛物线型分布模式,并用该模式分别对3种砌块砌体结构进行Pushover分析。

ABSTRACT Linear Motion Guide is a new kind of rolling functional unit with the advantages of simple structure, small difference between static friction force and kinetic friction force, high setting accuracy andgood stability of high precision, etc..

滚动直线导轨副是新兴的滚动功能部件,具有结构简单、动静摩擦系数小、定位精度高、精度保持性好等优点。

Last year the24th Air Force, the air-force branch of the new Cyber Command, was establishedat Lackland base just outside the city.

作为网络指挥部的一个空军分支,空军24号部队于去年在城外的拉克兰基地建立了。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力