压下

Firstly, by the data measured from field test, it was analyzed the characteristics and effect in reinforcing soft foundation with vacuum preloading method in which there is underplayed confined aquifer and sand.

首先，总结了真空预压现场试验监测成果，结合本工程有部分打穿下卧承压含水层及普遍存在夹砂层的特点，分析在此情况下，利用真空预压法加固软基的工程特性和效果，为以后类似工程的设计、施工工艺改进、机理研究和数值模拟等提供参考。

For LP casing of 50MW air cooling units,the internal 3-D flow field of the off-design simulated with Fine/Numeca,a 3-D CFD software,is introduced.

详细分析各工况下的三维流场信息，结果显示背压变化对末级的影响比较大，在高背压、小容积流量工况下，在末级动叶中部出现较大的分离区。

The inside surface difference between flank-extrados and flank-intrados of any section of loop shell should induce the force difference when the loop shell under internal pressure. The force difference in ring shell can balance itself.

对于内压作用下的任何弯管，因为弯管中线上径向向外的管壁表面积均要比中线上径向向内的管壁表面积大，两者面积之差在同一内压作用下产生面积压力差。

Group I:Completely resection of the mitral leaflets, chordae and tendineae, and papillary muscles; group Ⅱ:Preservation of the posterior leaflets and subvalvular structures;group Ⅲ:Completely preservation of the mitral complex.4h, 24h and 48h after operation, Swan-Ganz catheter was used to measure hemodynamic index: Mean pulmonary arterial pressure,pulmonary vascular resistance,pulmonary capillary wedge pressure,systemic vascular resistance,cardiac index and left ventricular stroke work index.

组：常规MVR，切除全部二尖瓣瓣叶及其瓣下结构；Ⅱ组：保留后瓣及其瓣下组织；Ⅲ组：全部保留二尖瓣装置。术后4小时、24小时和48小时分别采用Swan-Ganz导管测定血流动力学指标：平均肺动脉压、肺毛细血管嵌压、肺血管阻力、外周血管阻力、心脏指数和左心室每搏作功指数。

Rut formation mechanism and classification of 1 track of the generation mechanism Asphalt Concrete Pavement open traffic after the traffic load under repeated, the formation of track can be divided into three phases:(1) the initial stage of the compaction process: by the RCC, high temperature and in a semi-flowing state of asphalt and asphalt cement with slag was composed of mineral aggregate into between the aggregate at the same time was a strong line up has a certain frame structure.

车辙产生机理及分类 1车辙的产生机理沥青混凝土路面开放交通之后，在行车荷载反复作用下，车辙的形成可分为三个阶段：（1）开始阶段的压密过程：经碾压，高温下处于半流动状态的沥青及沥青与矿粉组成的胶浆被挤进矿料之间，同时集料被强力排成具有一定骨架的结构。

During this process, a vacuum is generated in the chamber, and garnet abrasives and air are pulled into the chamber, through an abrasive feed tube, and mixes with this high speed stream of water.

此过程中，由于水射流的高速运动，在混合腔中产生了负压。在此负压作用下，从磨料罐输出的磨料与空气一起被吸入混合腔，并在水射流的加速作用下，经磨料喷嘴喷射出，形成磨料射流。

The paper describes how the local force of the main web is considered as the force caused by the Contact pressure among the trolley wheel, rail and top flange, and how the contact analysis model for the local force is built by means of both Hertz theory and finite element software ANSYS combined. Also, it analyzes the variation of the local stress under the different conditions and comes to a conclusion, and compares the results derived from the experimental formula with the result from ANSYS.

本论文的主要内容：将Hertz接触理论和有限元软件ANSYS结合起来，把主腹板的局部受力问题视为小车轮与轨道及轨道与上翼缘板之间发生接触行为作用下的受力问题，建立了小车轮压作用处偏轨箱形梁主腹板局部受力的接触分析模型，研究不同情况（小车轮压、箱形梁几何参数和轨道截面惯性矩）下局部应力的变化规律，得出相关结论；最后将经验公式解与ANSYS数值解进行对比分析论证。

The oscillation performance of jet, as oscillation frequency, is the essential data for designing the fluidic device, which is also the key factor that influence the coupling effect of fluidic device and receiving tube. This paper does experiment on the oscillation availability and frequency of feedback jet-oscillation gas wave refrigeration. As a conclusion, the jet oscillates only in a certain range of geometrical sizes and operating conditions. Under the condition of high pressure ratio, the frequency of the jet"s oscillation is only affected by the feedback tube"s length and chamber remarkably. Under the condition of low pressure ratio, the frequency descends with rise of the pressure ratio.

本文将跨音速正反馈射流振荡器与接受管耦合，对耦合后的射流振荡气波制冷机的可振性、振荡频率以及它们的影响因素作了实验研究，得出如下结论：射流只在一定的操作条件和几何结构尺寸范围内才能稳定振荡；射流的振荡频率在较高压比下只受反馈管长和反馈管容腔大小的显著影响，在小压比下随压比的增大而增加；其它结构尺寸和操作条件只影响可振性。

The axial stress-strain curves under various level of confinement and strain rate were derived according to the experiment. It shows that the strength and ductility increase significantly because of confinement, and finally turn into plasticity, also it is strain rate sensitive.

实验得到了水泥砂浆在不同围压、不同应变率下的轴向应力应变曲线，发现材料在围压作用下抗压强度和韧性大大提高并且整体进入了伪塑性，而材料的应变率效应也是显著的。

Nineteen males with SCI, with the age range of 26~45 years, were included into the study. All patients underwent the B type ultrasound and video-urodynamic examinations to determine the hydronephrosis, post-residual urine volume, detrusor pressure at vesica ureter reflux, detrusor leak point pressure and maximum urethral pressure P(subscript ura.max before and after BTX-A injection.

19例合并肾积水男性SCI患者，年龄26~45岁，治疗前1个月用B超及影像尿动力学检查测量患者肾盂分离宽度、残余尿量、输尿管返流压P(下标 det.reflux、逼尿肌漏尿点压、最大尿道压力P(下标 ura.max等指标。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。