发展速度

The computation of two-dimensional advection transport using current methods such as Alternating Direction Implicit Method and linear interpolation technique can be subject to numerical attenuation,parasite oscillation and poor reproduction of wave propagation when large time steps are used.

在概化的平面区域内，采用上述方法模拟了二维初始浓度高斯分布和水流激波在旋转速度场及均匀速度场上的对流输移问题，结果表明方法在优化幅值衰减和数值扰动以及计算效率方面具有相当的发展潜力和应用前景

If the operator does not grasp now market development this trend, cannot manage the modernized management to take develops diligently goal, if the operator does not grasp the market development this to be unable to cause the management detachably now, the source of wealth to be luxuriant, uses the advanced data bank administration software management, may solve puzzle enterprise information questions and so on work security, reliability, single plane/Uses under the advanced number network environment the running rate to be quicker, the performance is stapler, data exchange speed even more quickly, accurate, running rate to be possible to hold the many client side concurrent operation quickly.

在此基础上现在有很多的商品批发商还是用手工出货，进货，计算，统计，那么成本方面和效率方面一定不高，如果达到以最小的成本得到最大的利润，那么一定需要选择科学，自动的管理方式。经营者如果不掌握当今市场发展的这一走向，就不能将现代化经营方式作为努力开拓的目标，就无法科学经营管理，让自己财源茂盛。如果采用先进的数据库管理软件管理，可以解决困扰企业信息化工作高成本、低产出、安全性、可靠性等问题，计算机/网络的管理软件运行速度快，性能更稳定，数据交换速度更加快捷、准确，可容纳多个客户端同时操作。

Based on the item of national high technology development project, the thesis studies the reasonable construction pattern of the tunnel portal, incidence of the micro-pressure wave and the the effect of bell-mouthed hood, lacunaris hood and expansile hood on alleviating the micro-pressure wave in the situations of single line and double line, obtains the relationship between the max micro-pressure wave and the velocity of the train as well as the relationship between the max micro-pressure wave and distance of measuring point at the velocity of 100km/h-550km/h, compares the different alleviative effect of the three different hood to max micro-pressure wave and finally proposes the reasonable construction pattern of the tunnel portal.

本文针对国家高技术研究发展计划(863计划)课题"磁浮交通沪杭线越黄浦江隧道的工程技术问题研究"，在单洞单线和单洞双线两种工况下，对隧道洞口的合理结构形式和影响范围，以及洞口喇叭形入口缓冲段、多孔壁入口缓冲段以及隧道出口膨胀室对减缓微压波的作用进行了研究，得到了磁浮列车速度在100km/h～550km/h时隧道出口微压波最大值与速度的关系以及微压波最大值与测点距离的关系，比较了三种不同形式缓冲结构对微压波最大值的减缓效果，提出了隧道洞口的合理结构形式。

The keys are improving the effective speed of take off and reducing the speed loss before footplate. 5. Technique improvement is the main task for Chinese triple jump athlete. The link up among three jumps, the conversion between drop and take off, the maintenance of the speed need research deeply all. The mostly way to improve the triple jump performance are finding properly jump structure and rhythm which fit the agility, harmonious, strength, speed, balance of Chinese triple jump athlete.

我们应该从三跳的衔接、三跳落地与起跳的转换、跳跃过程中保持向前的速度等技术训练方面进行深入研究；找出最适合我国运动员个体的跳跃类型和跳跃节奏，发挥我国运动员身体灵活、协调性好、掌握技术能力强、速度与力量发展均衡的特点，在三级跳远技术上有明显的提高，这是我国运动员提高三级跳远成绩的主要途径。6、注重训练结构的合理性是提高我国三级跳远运动成绩的另一个主要途径。

After a century, the kinetic theory of gases was also won the rapid development of .1857, the Clausius for the first time clearly statistical concepts, derived gas pressure, volume and temperature inter-correct relations, but also in 1858 introduced the concept of .1859 free path of molecular motion, the Maxwell velocity distribution law is derived, established the mathematical theory of transport processes .1868, the Boltzmann velocity distribution law was introduced in the gravitational field .

此后一个世纪，气体动理论才又获得飞跃发展。1857年，克劳修斯第一次清楚地说明统计概念，导出了气体压力、体积和温度间的正确关系，还于1858年引入分子运动自由程概念。1859年，麦克斯韦导出了速度分布律，建立了输运过程的数学理论。1868年，玻耳兹曼在速度分布律中引入重力场。

This paper introduces the development and principle, and present study situation of electrohydraulic proportional control system, and the work principle and every component of electrohydraulic proportional valve-controlled motor system of test platform are analyzed in detail, establishing the mathematics model of the valve-controlled motor system.

本文介绍了电液比例控制系统的发展、原理及目前的研究现状，对试验台的电液比例阀控马达速度控制系统的工作原理及各组成部件进行了详细的分析介绍，建立了阀控马达速度控制系统的数学模型。

Measurement of radial velocity and the historical development of the radial velocity spectrometer are briefly introduced in this paper.

简要叙述了视向速度的测量及视向速度仅发展的历史。

Development of an electric streamliner to set the electric land speed record, beating the top speed of 254mph, in the Bonneville Salt Flats Electric Vehicle Race.

一些站立六英尺高即将来临的项目一电streamliner 的发展创下电土地速度纪录，摔打254mph 的最高速度，在Bonneville 盐舱内甲板电车种族。

The nature of the acceleration unit-impulse response function of unbounded medium tending to vary linearly is proved by means of asymptotic analysis. Thus, the acceleration unit-impulse response function can be regarded as the summation of a linear function and a residual part which converges to zero. Based on this decomposition, two FE-SBFE coupling procedures are presented based on system realization and truncation integral technique respectively.

本文系统研究了相互作用力-运动关系的位移表达、速度表达和加速度表达，通过比较位移、速度和加速度单位脉冲响应函数的SBFE求解过程，确定采用相互作用力的加速度表达；通过渐近分析证明了无限地基加速度单位脉冲响应函数具有随时间延长而趋于线性变化的性质；利用这一性质将加速度单位脉冲响应函数分解为一个线性函数和一个衰减到零的残余函数的和，以此为起点发展出两种FE-SBFE时域耦合方法：基于系统实现的FE-SBFE时域耦合方法和基于截断卷积的FE-SBFE时域耦合方法。

Road construction is developed unprecedentedly and the highway construction speed is more remarkable.

公路建设以前所未有的速度发展，其中高速公路的增长速度更引人注目。

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。