The numerical results show that:(1) the throughflow wake is considerably influenced by the tip clearance. The low-kinetic-energy fluid accumulated in the shroud/pressure side of the unshrouded impeller, but in the shroud/suction region for 0.0 tip clearance; (2) there possibly exists an optimum size of the tip-clearance which is not the zero tip clearance to make the flow loss minimized.
研究结果表明，(1)NASA低速大尺度离心压缩机半开式叶轮的低速尾迹区在压力面与轮盖的角区，而相应的闭式叶轮的低速尾迹区聚集在轮盖的中心位置；(2)数值实验表明，叶顶间隙并非越小越好，可能存在一个最优间隙，使得叶轮流动损失最小。
The model includes that the relationship between median diameter, as well kinetic energy, of raindrop and rainfall intensity obeys logarithmic function, the critical slope degree of soil erosion is 38.4°～43.0° in test area and the best multiple index of rainfall erosivity value is /100. Employing the prediction model, the soil erodibility value, the accelerated value of excavation slope, roadbed slope, construction site, borrow pit, service road and other temporary occupation land and the loss-spoil ration of waste pile were examined. Finally, the integrated soil and water conservation measures in highway construction project have been suggested.
从而建立了凉山州天然降雨雨滴中数直径与雨强的关系和降雨强度与动能的关系，分析了高速公路引起水土流失的侵蚀性降雨标准、侵蚀转折坡度及不同流失区流失量的大小关系，给出了高速公路水土流失预测模式中降雨侵蚀力尺值的最佳复合指标，估算出路堤边坡、路堑开挖边坡、路基、临时施工用地、取土场、便道和其它临时占地的可蚀性K值、加速侵蚀系数A值以及的弃土场的流弃比B值，最后针对高速公路不同防治区水土流失特点提出了相应的综合防治措施。
Based on the rigorous analysis of the kinetic process of both primary and secondary electrons, the related surface charges were analyzed, and the energy gain of emitted electrons was proportional to the square of the ratio between the tangential and normal component of electric field. In this process, the image force of mirror charges would result in an energy loss. Meanwhile, the effect of field alternation of power frequency ac voltage on electron movement could be ignored.
在前人工作的基础上，进一步严格推导了场致一次发射电子和二次电子的运动方程，分析了电子发射引起的绝缘材料表面带电，表明电子发射后的能量增益正比于场强的切向与法向分量比值 F /// F ^的二次方；同时考虑了在电子发射和运动过程中电荷镜像力的作用，并探讨了交流电压下表面带电的情形，认为当考虑电荷镜像力的作用时，电子的能量增益可能变小，而工频交流电压下电场交变对电子运动的影响可以忽略。
The results indicate: diversion shell can transform the kinetic energy of fluid into pressure energy well, and eliminate the circumferential component of fluid; the inlet incidence angle of vaned diffuser increases at the condition of O.8Q, and it results in flow separation very likely and the hydraulic loss increases; it is nearly non-impact inflow at the condition of 1.2Q, and the velocity distribution is uniform at the inlet of vaned diffuser and flow separation dose not appear.
结果表明：导流壳能很好地将叶轮中流出的流体的动能转化为压能，并消除速度的圆周分量；在0.8Q工况下，空间导叶的进口冲角增大，容易在空间导叶背面产生流动分离，造成水力损失增加；在1.2Q工况下，空间导叶的进口接近无冲击入流，在进口处流速分布较均匀，其内部未发生流动分离现象。
An engineering model on mass abrasion of kinetic energy (KE) penetrator is presented to predict the nose shape and mass loss of the residual projectile after high speed penetration into concrete.
通过对高速侵彻弹体的质量侵蚀实验现象进行分析，建立了质量侵蚀的工程理论模型，可对动能侵彻弹体头部侵蚀后的头形和质量侵蚀进行预期。
Associated kinetic analysis results indicate: the thermal degradation of PS in main mass loss stage (the first stage) accords with second order chemical reaction equation; besides, the average activation energy Ea for this stage is 166.19 kJ/mol and lnA is 32.15.
动力学计算拟合结果表明，聚苯乙烯的主要失重阶段（第一阶段）的热解符合二级化学反应方程，其平均表观活化能Ea值为166.19kJ/mol，lnA值为32.15。
The correction calculating formula of the effective driving force is got after deeply analyzing the effect of disequilibria, nonlinear and kinetic energy loss in actual vaporizing process of the boiling chamber.
在深入分析沸腾室内实际汽化过程的不平衡、非线性和出口动能损失等影响后提出了有效推动力的计算式。
The correlation between the factor of restitution in impact and the factor of kinetic energy loss defined in corresponding references is deduced.
推导了相关文献中定义的碰撞恢复因数与动能损耗系数间的对应关系。
The results show that the pressure loss in the generating process is mainly resulted from the section shrinkage. The lost pressure is about 49 percent of the final kinetic energy of hyperpressure waterjet.
结果显示，在超高压水射流形成过程中，压力损失主要是在水流从高压管道进入高压喷嘴时由于流道发生断面收缩而造成的，压力损失大约为最终超高压水射流动能密度的49%；
So the kinetic energy loss can be reduced greatly and the driving pressure of the natural circulation can reach 11kPa~15kPa, which means no pump is needed for circulation drive.
还能大幅度地降低出口动能损失，使自然循环的有效推动力强化达到11kPa～15kPa，从而省去高能耗的强制循环泵。
The weight loss curves of three-ply wood were obtained based on the pyrolysis experiment, and the corresponding kinetic parameters, i. e. activation energy E and frequency factor A, were calculated.
通过热解实验，得到了三合板的失重曲线图；计算了其热解动力学参数活化能E和频率因子A；
Diminishing energetic loss of the rotating currents in pipe passways and resistance of the spray heads to the currents, coupled with reasonably preparing cement slurry, is believed to be of utmost importance to improving in rotating spraying kinetic energy so as to expand the diameters of piles.
设法降低管路中能量损耗和喷嘴对液流的阻力，合理配置水泥浆液，对提高液流的动能、增大旋喷桩桩径有着重要的作用。
The key point of speed regulating braking is to determine the initial point and braking releasing point. The optimal strategy is to reduce kinetic energy loss, satisfying the constraints of lowest releasing speed and avoiding second brake regulating.
分析了列车制动过程及操纵要求，指出调速制动的关键是合理地选择制动初始点和缓解点，即在同时满足最低缓解速度约束和避免二次调速制动的前提下尽可能减少列车动能损失。
This kind of equipment may collect vehicles'after decelerating device time loss kinetic energy, stores up by the electrical energy form in the accumulator cell.
这种装置可以将车辆经过减速装置时的损耗动能收集起来，以电能的形式储存在蓄电池里。
The weight loss curves of three-ply wood were obtained based on the pyrolysis experiment, and the corresponding kinetic parameters, i.e. activation energy E and frequency factor A, were calculated.
通过热解实验，得到了三合板的失重曲线图；计算了其热解动力学参数活化能E和频率因子A；