主要动力

The objective of this study is to study the kinetic parameters of surfactant-enhanced permanganate oxidation of tetrachloroethylene, and then compared them with the parameters of trichloroethylene studied in other literatures.

本研究主要目的为利用界面活性剂配合过锰酸钾降解水中之四氯乙烯(tetrachloroethylene， PCE)，以求得PCE之相关动力参数，再与文献中三氯乙烯(trichloroethylene， TCE)之动力参数做比较。

The results indicated that the effect of deep warm-wet air coming along the behind subtropical high , moving eastward deepening upper trough , shear line and cyclone trough was caused in Zhuanghe , but no strong thunderstorm . The main impact of system is surface cyclone trough ; Low vortex , shear line in 700hPa , 850hPa strengthen the lower convergence , forming a strong momentum of increase and pieces of water vapor ; strong and wide potential pseudo-equivalent temperature frontal zone lied in Zhuanghe area , the establishment of potential instability are indispensable conditions for producing heavy rain .

结果表明：受副热带高压后部深厚的暖湿气流及西风带高空槽、切变线及气旋倒槽等动力系统共同影响，庄河地区出现了大暴雨天气，但没有出现强雷暴，此过程主要影响系统是地面气旋倒槽；700hPa、850hPa低涡、切变线使中低层辐合加强，形成了较强的动力抬升和水汽辐合；庄河地区处于强而宽的假相当位温锋区中，位势不稳定的建立是造成此次强降水的必要条件。

So karst vegetation is charactered by Petrophile, Xerophile and Calciphihe in those areas where soil cover is very thin, and the underground drainage system is well developed. The running of karst ecosystem is controlled by two subsystems, which are karst dynamic system in inorganic life and genetic information transmitting system in organic life.

岩溶生态系统的运行受到两个子系统的联合作用驱动，即无机方面的"岩溶动力系统"和生命方面的"遗传信息传递系统"，但主要受以碳、水、钙循环为中心的岩溶动力系统的控制。

This article elaborated an experimental system for acquiring this coefficient. The dynamic amplificatory coefficient of derricks in use can be acquired through collecting and calculating the signal of this system, so that it can provide the critical data for inspecting the loading capacity of offshore derricks.

主要介绍了一种获得海洋钻机井架动力放大系数的试验系统，利用该系统采集的信号，通过计算获得在役井架的动力放大系数，从而为海洋钻机井架的承载能力的计算提供了关键数据。

After that, a numerical model about Zhejiang shore tide is established by mike21 program. After validating the good agreement between simulated results and observed ones, the planar hydrodynamic flow of this ocean area is analysed in detail. Then co-tidal and co-range chart of each main tide is drew based on the computational result. It can be found that each co-tidal and co-range chart that is based on the simulated result is suitable to the co-tidal and co-range chart that is deduced from autoptical data, besides, the modle co-tidal and co-range chart can perfect the co-tidal and co-range chart from autoptical data where autoptical data is too hard to get .

在这之后，使用MIKE21水动力模块建立起浙江近海海域潮波模型，在模型潮位、潮流流速流向验证均合理的基础上，分析了计算得到的二维水动力流场，最后将模拟结果绘制出浙江近海M2、S2、N2、K1、O1主要分潮的同潮时图，并将其与实测同潮时图比较，发现各分潮等振幅线及同潮时线相同或相近值的等值线位置及走势基本一致，而且模拟得到的同潮时图对实测资料覆盖不到的海区做了适当补充。

In this paper, the hydrodynamic characteristics and theoretical calculation method of cycloidal propeller have been studied comprehensively, and attempt has been made for cycloidal propellers for using on underwater vehicles, the main research works are as follow

本文就摆线推进器的水动力性能及水动力性能计算方法进行了较全面的研究，并对其在潜器上的应用做了有益的尝试，主要的研究内容包括以下几个方面

On the instance of sand factor to shallow evolvement being feeblish , The analysis of water power is especially important.

水动力因素是影响浅滩演变的一种主要因素，在泥沙等因素对浅滩演变影响较弱的情况下，水动力的分析就尤显重要。

The trend of seawater is that the intrusion area varies as following rule: small to big to small to big, and the causation of seawater intrusion is the appropriate hydrodynamic and hydrogeological condition, and the main reason is that human activities change the groundwater hydrodynamical condition.

海水入侵的趋势为：海水入侵面积有小；大→小→大的变化规律：海水入侵的成因是具有了水动力条件和水文地质条件，而人为的改变地下水动力条件是发生海水入侵的主要原因。

In order to solve the similitude problem of shaking table scale modle test of dynamic interaction of pile-soil-bridge structure in ground of soil liquefaction, based on the theorem of Bockingham π widely applied at present, the dimensional analysis method is used, and the constitutive strain-stress relationship of material between model and prototype and the dynamic response similarity of pile-soil interface are considered at the same time.

基于目前广泛应用的Bockingham π定理，主要采用量纲分析方法，并且结合考虑模型与原型之间的材料变形应力-应变本构关系及桩－土接触边界动力响应相似性，求解液化场地桩－土－桥梁结构动力相互作用振动台试验的模型设计相似关系，同时提出人工质量问题的解决办法。

Its main function is,according to the components processing request,arranging various main axles position, and bequeathing the power and the movement by the electrical machinery or the power part to each work main axle,enable it to obtain set rotational speed and direction.

其主要作用是：根据被加工零件的加工要求安排各主轴位置，并将动力与运动由电机或动力部件传给各工作主轴，使之得到要求的转速和转向。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。