动力的

Objective To explore the effect of temporary metal internal stent and endoscopic balloon dilation on esophageal motility with achalasia.

目的探讨暂时性金属支架和内镜下球囊扩张治疗贲门失弛缓症对食管动力的影响。

Atypical problem is that our learners of WBI have no enough dynamics to study whenthey face the key composition of our WBI—online course. How to raise the learningdynamics by effective designing of online course is very important. In view of this, westudied how to improve learning dynamics of WBI learner by effective design of onlinecourse.

一个典型的问题就是，我们的网络学习者在面对我们网络教育的核心成分—网络课程时，积极性并不高，也就是说没有足够的动力去学习，由此看来研究如何通过对网络课程的有效设计来提高学习者的学习动力的问题有着相当重要的意义的。

This paper establishes mathematical models of unsteady and Non-Darcy low speed flow through the porous media and the double porous medium, and has obtained their solutions in an infinite reservoir through Laplace transformation, and their long time asymptotic solutions has been worked out, solutions on a bounded reservoir has also obtained through finite integral transformation and Laplace transformation.

从现场上各种水淹的实际资料来看，同一水动力的非均质油层系统中，渗透率相对较高的部分水洗之后，渗透率相对较低部分的油层却可以原封不动。而且，其渗透率可达达西级，含油饱和度可达80％以上。相对流动比(即同一水动力的非均质油层系统中，小层平均渗透率的最大值与其中不流动部分的小层平均渗透率的最大值相比)的比值在各种油层的生产实例中十分相近。一般的分布范围为3—7，常见的为4—6。实验室结果和生产实践基本相同。简单的注水和压裂对这一比值几乎无影响。

The research of learners learning dynamics is fewcomparatively, but some of the researching experience of forefathers has offered certaintheoretical basic and some worth-while references for us to research learning dynamicsin network environment.

但是在网络环境下有关学习者的学习动力的研究还相对较少，但可以肯定的是前人的一些研究为我们对网络环境下学习者学习动力的研究提供了一定的理论基础和一些值得借鉴的经验。

The concept of hydrogen fuel cells was invented in 1839 by Sir William Grove. BOC's director of sustainable energy, John Carolin, said:"The lessons from this and other projects will show that hydrogen fuel cell-powered vehicles could be a practical, attractive and a viable economic alternative to diesel- or petrol-fuelled vehicles."

BOC公司可再生能源部的主管约翰·卡罗林表示，&通过这辆汽车及其它同类项目所得到的经验将会告诉世人，将氢燃料电池做为汽车的动力来源这一想法是可以变为现实且颇具吸引力的，从经济角度来看，这种车也完全可以替代那些以汽油或柴油做动力的汽车&。

When the peak intensity of the laser pulse exceeds the relativistic laser intensity, the electric field parallel to the propagation direction of the laser will emerge by rather large amplitude under the effect of the ponderomotive force.

激光的有质动力加速是指当激光强度大于相对论光强时，除了电子的横向振动，激光的振荡电场在有质动力的作用下将产生极大的沿激光传播方向的分量。

Furthermore, it is concluded that wind waves and tidal currents are the two predominant factors related to sediment resuspension and control of the changes of suspended sediment concentration, in which tidal currents control the neap-spring tidal cycle, and wind waves control the seasonal fluctuation.

进一步分析认为，海洋动力是泥沙再悬浮的主导因素，制约悬沙浓度的年内变化，其中潮流控制悬沙浓度的大小潮周期变化，风浪引起悬沙浓度的季节性变化，河流径流和海洋动力的对比制约悬沙浓度的空间分布。

On our test run, the car was agile, the linear performance of both supercharged and turbocharged was perfect for daily and sporty motoring. We discovered that from 3000 to 4000 revs, the engine was more powerful in particular on the "Sport" mode. The boost meter gave clear indication of power being built up and it was handy to notice. The lever gear control on the steering was very good in straight line. We noticed that the gear shifter was much more convenient to use in all circumstances.

在我们的试车过程中，GT是十分敏捷及享有一个线性的表现，双加压部件合作无缝，这种表现是十分适合日常及运动性的表现，我们发现GT於3千至4千转数时它的彭拜动力是同类型车种中罕有的，特别是在&Sport&模式当中，压力表中显示出动力的积蓄亦可以清楚易见，於方向盘背后的两旁的方便传档板，於大直路时使用十分方便，可以更敏捷转波。

In order to improve the stability and reliability of the models, especially in the marine platform drilling rig in order to meet the high standards and strict power requirements, CPC Jinan Diesel power demands in accordance with domestic oil market situation and the company markets products in the oil field use, decided to 4012 Long-stroke diesel engine is fully optimized and updated, and comprehensively improve the models of economy, adaptability, especially in reliability to achieve new breakthroughs to make it into a completely independent intellectual property rights, high reliability, power, good , fuel consumption is low, high degree of automation of the diesel engine, making it the leading, world-class level, can completely replace the current oil market, the corresponding power of China's imports of aircraft-grade new model.

为了提高该机型的稳定性和可靠性，特别是为了满足海洋平台对钻机动力的高标准严要求，中油济柴根据国内石油市场动力需求现状和公司产品在油田市场的使用情况，决定对4012型长冲程柴油机进行全面优化和更新，全面提高该机型的经济性、适应性，尤其在可靠性方面实现新的突破，使其成为具有完全自主知识产权的、可靠性高、动力性好、油耗低、自动化程度高的柴油机，使其成为国内领先、具备世界一流水平、可完全替代目前我国油田市场上相应功率档次进口机的新机型。

By the fullscale test of unsteady-flow fire in tunnel, applying aerodynamics of one-dimensional compressible unsteady-flow the relation between thermal power and thermal resistance in burning zone was analyzed, and its calculational methods were discussed. It is shown that besides heating swell, resistance and...

无论平巷或斜巷的燃烧，燃烧区的热动力势是最强的，其变化梯度为3～6Pa/m，压力最低点位于燃烧区的出口；热动力的概念把巷道一般流动损失、火区流动损失和火风压完全统一起来了，解决了实际巷道火灾燃烧区热力计算的困难，使火灾时期的风网解算更符合实际。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。