极限

The results of simulations of three-graded-concrete supported beam under dynamic load show that in the impact load the carrying capacity improved and the displacement decreased when specimen failed, and without inial static load, it is dangerous that material tensile strength and elastic modulus were improved to its 1.3 times in the code.

三级配混凝土动载数值模拟结果表明，在短时高速的冲击荷载作用下，试件的极限承载力提高，破坏时的位移降低；在没有初始静载的情况下，规范规定的把材料的抗拉强度和弹性模量提高1.3倍所得极限承载力相对较大。

Based on this we one and for all give the unified definition of 24 kinds distinct limit of the simple function and in new way use intactly, succinctly, systematicly giving prove of set of propositions about the limit of the simple function.

将现有的邻域概念作了适当的扩充，在此基础上，一次性地给出了一元函数的24种不同极限的统一定义，并进而以新的方式更完整、更系统、更简洁地给出了有关一元函数极限的一系列命题的证明。

Furthermore, a practical formula is proposed based on the experimental results to calculate the ultimate strength of the reinforced concrete columns strengthened by circular steel jacketing.

在试验结果的基础上，提出了圆形钢套管加固钢筋混凝土柱极限承载力计算的实用公式，极限承载力的计算结果和试验结果吻合良好。

Rats, we observe the effect of labiatae and tetramethylpyrazine to the death rate[6] after the rat's operation separately, and HE dye the residual

目的：探讨丹参和川芎嗪针剂对大鼠极限性肝叶切除后早期残肝损害的效应。方法：建立大鼠90%极限性肝叶切

Flow convergence regurgitant volumes and fractions were calculated by using the hemispherical flow convergence equation with 81, 71, 58, 46, 37 and 29cm/sec aliasing limit velocities, and the effective regurgitant areas were calculated with 58, 46 and 37cm/sec aliasing velocities.

按半球血流会聚公式分别计算混叠极限为81、71、58、46、37和29cm/sec时返流量、返流分数(返流量/二尖瓣口流入量)及混叠极限为58、46和37cm/sec时有效返流口面积(返流量/返流速度时间积分)。

Shoe of limit of use constant letter undertakes the limit erupts training basically is flesh fiber medium fast flesh fiber enlists campaign, sarcous is offerred can means is given priority to with metabolizing without oxygen, after the crus after training group sarcous exterior moves locally, fast flesh fiber adds thick, scale to increase; Muscle systole is more fast and consequently strong.

使用恒信极限鞋进行极限爆发练习主要是肌纤维中的快肌纤维参与运动，肌肉的供能方式以无氧代谢为主，练习后小腿后群肌肉的外观位置上移，快肌纤维增粗、比例增大；因而肌肉收缩更加快速有力。

This paper introduces calculation of bolt connectin supported by eccentric sheal force on the basis of ultimate strength and compares ultimate strength method with elastic method.

介绍了按极限强度法计算承受偏心剪力的普通螺栓连接计算方法，通过算例比较了按极限强度法和按目前工程设计中常用的弹性法计算的差别。

When these parameters surpass a certain value, the system cannot appear the limitcycle. Through the various parameters\' changing, it demonstrates the forming process of the dissipative structure. Thus it show the dissipative structure\'s characteristic of the trophodynamics predation model and point out the ecological significance of the various parameters in the model.On the fourth chapter, the spruce aphides and its predator model is a predator model.

第四章，以两个捕食者作用于同一食饵的竞争关系模型为例，应用微分方程定性理论，对捕食模型中存在极限环的情况进行了讨论，用MATLAB在相平面上模拟出系统的极限环，此时该体系状态的发展呈现周期振荡趋势，从而揭示出营养动力学为基础的捕食模型耗散结构特征。

It was shown by experimental results that ther e a re four factors playing chief roles on processing of fin such as geometr ic parameters of cutting tool, depth of extrusion, feed and speed of choppin g-ex trusion. For a certain cutting tool, a limit feed was brought up with a defini te extrusion depth under given chopping-extrusion speed.

实验结果表明，影响翅片形成的主要因素有刀具几何参数、挤压深度、进给量和劈切挤压速度；对某一刀具，在选定挤压速度时，一定的挤压深度对应一个极限进给量，一定的进给量对应一个极限挤压深度。

Test results show that (1) the failure modes of the strengthened beams at high temperature can be classified as a flexure failure mode and a flexure-shear one;(2) the flexure failure of the strengthened beams at room temperature may change at high temperature;(3) as compared with the unstrengthened beam, the strengthened beams with higher load are of stronger fire resistance due to the existence of fire coating; and (4) the increase of the strengthening ratio may result in the improvement of fire resistance and the change of failure mode.

结果表明：高温下该类构件的破坏形态大致可分为受弯破坏和弯剪破坏两类，常温下发生弯曲破坏的加固构件有可能在高温下出现破坏形态的转变；虽然加固构件所承受的荷载明显大于未加固构件，但由于防火涂料的保护，其耐火极限仍大于后者；碳纤维布加固量增加有可能导致加固构件的耐火极限延长，同时还可能涉及破坏形态的转变。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐