并流

The three dimensional flow field in the triple-screw extruder with triangle configuration is the research objects of this task, including velocity field, pressure field and shear rate field etc., simulate the representative flow field in metering section of the triple-screw extruder, consisted of three-thread element with75mm pitch, has been simulated at the screw speed of 60, 120, 180, 240 and 300rpm and the flowing regulations in flow field and especially the role of the unique center zone affecting to the conveying and pressure generating ability have also been analyzed.

本课题以三角形排列的三螺杆挤出机三维流场为研究目标，研究内容包括速度场、压力场、剪切速率场等。模拟分析首先以螺距75mm的三头螺纹元件为代表，计算由其构成的三螺杆挤出机在60、120、180、240及300rpm转速下的流场，分析流动规律，并分析了特有的中心区在输送、建压方面的作用。

In order to improve the effects of flume on its flow pattern at the tail gate,through analyzing of the influence of several commonly-used tail gates upon their flow patterns at their tail segments, and combining the formula of logarithm velocity distribution and that of free discharge from small orifices, a formula of calculating orifice diameter in a new inclined dragging tail gate is deduced.

为了改善水槽尾门对水槽尾部流态的影响，从几种常用水槽尾门对流态影响的分析入手，结合明渠流速分布对数公式和小孔口自由出流公式，并根据分层来流量与孔口出流量相等的原则，推导出一种新型斜拉孔板尾门开设孔径的计算公式。

The standard flow channel valve can be used: the United States NIBCO T-580-70 Valve; S-580-70 Valve (2), available to full-flow channel valve indented Path: The United States NIBCO T-585-70 Valve; S-585-70 Valve 2, check valve: Path DN65 valve should be used the following Swing Y-shaped structure, and in accordance with the United States valves and pipe fittings Manufacturers Standardization Society MSS-SP80 standards of manufacture, working pressure 125 lbs class, in line with the United States Society for Testing and Materials Standard Bronze ASTMB62 valve, configuration, Teflon flap valve seat, or seat configuration flexibility of the spring-driven lift-type check valve.

可采用的标准流道阀门：美国尼伯科T-580-70球阀；S-580-70球阀（2）、可采用的不缩径全流道阀门：美国尼伯科T-585-70球阀；S-585-70球阀 2、止回阀：通径DN65以下的止回阀应该采用Y形旋启式结构，并按照美国阀门和管件制造商标准化协会MSS-SP80标准制造，工作压力125磅级，符合美国材料试验协会ASTMB62标准的青铜阀体，配置聚四氟乙烯阀座阀瓣，或配置弹性阀座的弹簧驱动升降式止回阀。

The stress and stain of soil slope are determined by solving the coupling elasto-plastic equilibrium equations with seepage force taken into account, and the analysis method is applied to the computational example of slope caused by rainfall in the paper.

由算例分析得知，利用非饱和渗流耦合应力的弹塑性来分析非饱和渗流而引起的土体滑坡的变形和发展是可行的，并值得完善和发展。

Finally ,the state of taking off and landing with slip stream produced by the propeller is simulated, and the effect of slip stream to plane is analysed.

最后，对附加螺旋桨滑流的起飞、着陆状态进行了数值模拟，并分析了滑流对全机气动力的影响。

This study mainly from the cement-based self-leveling mortar work, and mechanical properties to consider, analysis superplasticizer, aggregate, mineral admixture, can be dispersed polymer powder to its various properties of addressing the mobility and Stability, as early as strong moderate condensate, the contraction and expansion, superplasticizer incorporation and mortar expansion of the loss of contradictions, and optimize the mix finalization of the scope and mortar flow analysis of factors affecting the performance.

本实验主要从水泥基自流平砂浆的工作性，力学性能考虑，分析高效减水剂、集料、矿物掺合料、可再分散聚合物粉末对其各种性能的影响；解决大流动性和稳定性，早强和缓凝，收缩和膨胀，高效减水剂的掺入和砂浆扩展度经时损失的矛盾，最后确定优化配合比范围；并对砂浆流变性能影响因素进行分析。

Self-Exciting Mode Oscillating-Flow Heat Pipe, also called pulsating heat pipe or oscillating heat pipe, is a novel heat transfer device that has an excellent heat transport performance.

自激振荡流热管也称为脉动热管，是一种新型高效的传热元件。本文提出了采用脉冲加热代替常规连续热源加热强化自激振荡流热管传热的方法，并对其进行了实验研究。

In this thesis, it is analysed how to calculated the stable seepage field of earth rock-fill by finite element method, then the principle and the step of the volume method is also expatiated on the basis of former research achievments.

本文在总结前人研究成果的基础上，对利用有限单元方法计算土石坝稳定渗流场进行了研究和分析，并阐述利用体积加权法计算稳定渗流场的原理和步骤。

The structure and the operating process of the hydrodynamic suspension ultra-smooth machining system were introduced.

建立了超光滑表面加工的液流悬浮加工系统，并简述了液流悬浮超光滑加工系统及其工作原理。

Interpath interference which arises due to non-zero cross and auto correlation of more than one spreading code is suppressed by estimating a transmitted signal stream, or a plurality of such signal streams in the case of a plurality of multipath components, respreading this estimated signal and subtracting non-orthogonal interference contributions from a received signal.

通过估计发射信号流或者存在多个多径成分时的多个信号流、将所估计的信号再扩频、并从接收信号中减去非正交干扰分量，抑制不止一个扩频码的非零互相关和自相关引起的径间干扰。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷