流动

PIV technique, a non-touch measurement method, was used as the experiment means. The unsteady flow within the vanelesss and vaned diffuser were measured and analyzed first time in our country.

实验中采用非接触式的PIV光学测量技术，在国内首次使用PIV技术对无叶扩压器、有叶扩压器两种结构形式扩压器内部的非定常流动进行了测量，分析了其中的流动特性。

The unsteady flow induced by two blunt bodies between two parallel walls is compared with the STARCD software result. The unsteady turbulent flow field within impeller and vaned diffuser in centrifugal fan is computed for the first time in China.

对Couette流动和同轴旋转圆柱面间流动的计算验证了移动网格方法和改进后PISO算法的可靠性；进而对平行平板间两相对运动钝体绕流的非定常流场进行了计算，其结果与STAR-CD软件结果一致。

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。

Such as: calibrating the laser system, calibrating the measurement region and focusing the CCD camera for the diffuser passage with complex shape, selecting the best incidence angle for the laser sheet,, setting the time parameter including the time between pulses and the time between records, designing the laser system, and selecting water fog with 1～5μm diameter as seedings for PIV measurement after comparing several particles. All of the work is useful to accumulate the PIV measurement experience in turbomachinery. 2. Experimental research of the unsteady flow in diffusers The instantaneous velocity fields within the vaneless and vaned diffuser were measured by using PIV technique.

本文在国内首次进行PIV测量系统对离心风机扩压器内部非定常流动的测量，为此，作者作了必要的实验前期工作：双谐振激光器工作特性的标定；针对扩压器复杂的流道形状，解决了片光源照射区域位置的标定和CCD相机的聚焦等问题；为复杂流道形状的扩压器内部流动的PIV测量选择了最佳片光源入射角度；选择了合适的PIV测量时间参数；为实现非定常内流的PIV测量设计了PIV系统的光路布置；根据非接触测量示踪粒子的选取原则，对几种示踪粒子进行了筛选，最终1～5μm的水雾粒子在本文实验条件下获得最佳效果。

Because the floating population were lack of knowledge of Verminosis prevention and with high risk behaviours.It needs to strengthen health education and behavior intervention on floating population.

结论流动人口普遍存在寄生虫病知识缺乏与高危险行为，应加强对流动人口的宣传教育和行为干预。

Children of the member that partial hobo children learns to proofread worker of ab extra Wu is avoided receive education to compensate gold, get great welcome, but hobo children school also is existing pay of insecurity of persons qualified to teach, teacher standard of persons qualified to teach of not tall, whole is wronger wait for a problem.

部分流动人口子弟学校对外来务工人员子弟免收教育补偿金，受到极大欢迎，但流动人口子弟学校也存在着师资紧张、教师待遇不高、整体师资水平较差等问题。

And the polycarboxylate based superplasticizer prepared by the macromer under optimal condition has good plasticizing and fluidity-retaining ability, the initial fluidity of cement paste reaches 303 mm, and the fluidity after 1 h is 297 mm.

以最佳酯化工艺制得的大单体为原料制备的聚羧酸系减水剂，具有良好的分散性和保塑性，掺该减水剂0.15%的水泥净浆的初始流动度达303mm，1h后其流动度为297mm。

These results provide not only new evidence to understand the flow characteristics of microfluid,but also new references to design devices using flow characteristics of microfluid.

这些结果不仅为理解微流体的流动特性提供了新的证据，而且也为利用微流体的某些流动特性制作器件提供了新的参考。

Find relationship profile between velocity and pressure by Laplace transform from the governing equation of microtubes, and discuss behavior of microfluid using data above.

理论方法以微管内流动统御方程式，经拉普拉斯转换技巧推导出速度与压力梯度之关联性，并讨论微管内流动特性。

Based on the coupling numerical solving method, the velocity distribution and flow behavior of Ar in a ladle furnace lid was calculated and analyzed by numerical simulation.

采用耦合数值求解的方法，计算并分析了LF精炼炉盖内气体流动的速度分布状态以及液面附近惰性气体氩的流动行为和分布。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。