并流

First,from this kind of conversion system,the characteristic of space antithetic and the dual distributed for power and data flows are analyzed. According to the concept of power electronics building blocks,a networked distributed control strategy is reviewed,and the building process of the application system is presented.In addition,the theory of standardization for complex power conversion system is summarized.

首先，论文以复杂系统为研究对象，分析了应用系统的功率流和信息流在空间结构上的对偶关系和双重分布的特性；在电力电子集成模块(Power Electronics Building Blocks，PEBB)的基础上，研究了变流系统的网络化分布式控制方案，并得出系统组构的初步构想，总结出适合复杂电力电子系统集成的标准化理论。

However, when Alexander the Great (356-323 B.C.) defeated Darius Ⅲ(reigned 336-330 B.C.) at Arbela, resulting in the latter's death, Persia became a province of Macedonia.

然而，当亚历山大大帝（Alexander the Great，公元前356-323年间）在阿尔比拉打败了大流士三世（公元前336-330年间在位），并导致大流士三世后来死亡时，波斯就成为了马其顿王国的一个省。

Aiming at this problem, we have carried out an experiment on seepage properties for mudstone and argillaceous rock, showed the test result, and analyzed the reason why both the β-factor and the acceleration coefficient are negative. In addition, mistakes often made by some researchers about positive or negative signs before the non-Darcy β-factor were pointed out.

指出一些文献在引用Forchheimer关系时出现的非Darcy流β因子前正负号的错误，给出了非Darcy流β因子和加速度系数出现负值的泥岩和砂质泥岩试样全应力－应变过程中渗透特性试验结果，并对其原因进行了粗浅的分析。

Fourth, the membrane recovering method was found within stationary tubular membrane elements and was compared with rotating flow by using experiment, that is, the unloading pressure recovering method is one of the most efficient method, it may reduce the auxiliary time, such as washing , backflush, reverse filtration, but the tubular membrane is washed or backflush or changed after the cycle period are accumulated numerous times.

第四、对旋转流静止管式膜的再生进行了实验比较，并提出了旋转流膜管可以通过卸压再生，以减少膜管每次使用后的冲洗、反吹等辅助时间，采用该种方法再生的膜管其渗透通量完全能满足要求，当循环使用一定次数后再进行或冲洗或反吹或更换新膜管。

To measure the external characteristics of hydraulic coupler by the controlled dynamic regenerated loading up method;2. The external characteristics of a biconical hydrocyclone used for waste water treatment are studied on the device.

为了检验新型污水处理系统设备的除油性能，设计建造了一套室内双锥型水力旋流器试验装置，并在该装置上进行了旋流器的外特性试验。

Through analysis of the characteristics of power flow, transmission efficiency and self-lock of a combined planetary transmission, a design method based on the power design parameter of the bifurcated power of the main branch and the total input power ratio was developed in this paper.

对组合式行星传动的功率流特性、传动效率、自锁条件等进行了分析，提出了以系统主支路功率流大小与输入总功率的比值为功率参数的设计方法，并给出了系统实现功率分流传动和自锁的判别准则。

Then, the steady-state productivity model for horizontal well in gas reservoir is established. On the basis of solving the model, this thesis deduces the binomial deliverabiliry equation by which absolute open flow potential and inflow performance relationship can be gotten and we can forecast the production performance of horizontal well in gas reservoir.

其次，在建立水平气井稳定渗流的数学模型并求得其解的基础上，推导出了考虑地层伤害及非达西渗流影响水平气井二项式产能方程，通过该二项式产能方程可求出水平气井的绝对无阻流量，绘制流入动态关系曲线来预测生产动态。

Expansions in orthogonal functions is used to solve the Orr-Sommerfeld equation in studies of the linear stability of parallel flow. For the plane Poiseuille flow the critical Reynold number is given accurately. Furthermore, the Blasius flow which is considered locally parallel has been studied, and the neutral stability curves, which are very important for the stability study, are given.

对于平行流的托尔明—施里希廷(Tollmien-Schlichting，T-S)波的线性稳定性，采用谱方法求解平面Poiseuille流的Orr-Sommerfeld方程，得到了精确的临界雷诺数；并研究了局部平行假设下的Blasius边界层流动，分别给出对稳定性研究至关重要的中性稳定性曲线。

So it is important to make research on muzzle flowfield, and analyze the effects of muzzle blast wave on the firing precision of gun.

所以对膛口流场进行研究，并分析膛口流场对弹丸的影响，对于指导实验和改进火炮射击精度很有意义。

In order to highlight and analyze the influence of heterogeneous knowledge flows to enterprises in the modern service industry,based on a review of the Colonel Blotto game,some presumptions such as the game s utility function are modified,and a mechanism to change tacit knowledge into explicit knowledge is constructed to carry out an analysis of a two-player knowledge flow management.

为了深入认识异质性知识流对企业尤其是现代服务业企业发展的作用，借助于经典的Colonel Blotto博弈模型，并对其效用函数等进行了修正，通过构建一个隐性知识和显性知识之间的联系机制，展开两企业知识策略的Blotto博弈分析，对企业的知识流最优反应策略性质等进行了认识。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。