压下

The cold-formed sheet is a groove-shaped structure that is composed of a crown plate and reinforced ribs connected with ends of the crown plate; the box beam is a box-shaped structure comprising an upper wing edge, a lower wing edge and two side webs that are connected in every two components.

由压型钢板、纤维增强塑料箱梁组成，压型钢板为由顶板和顶板端部的加强肋相连组成的槽形结构，箱梁为由上翼缘、下翼缘和两侧腹板两两相连组成的箱形结构，其结构如图所示。

While the oscillating flow cycle-averaged pressure drop for a Nylon wire screen regenerator is larger than that for a stainless steel regenerator, which is 3 to 5 times higher than that in a steady flow.

这一结果与其他相关文献的结论基本吻合。对於非金属蓄冷器，发现它的平均压降要大於金属蓄冷器的平均压降，是相同条件下稳定流动的3~5倍。

The trend of intranasal pressure drop at different airflows measured by CFD model was the same as that measured by rhinomanometry, while the transnasal pressure obtained by CFD model was lower than that recorded by rhinomanometry.

CFD模型计算各流量下鼻腔压降变化与鼻阻力计测量得到的压力-流量分布曲线的变化趋势一致，但压降值前者小于后者。

Experimental investigation on strongly separated flow in an annular compressor cascade ;2. The structures of separated flow, especially, vortices, inside an annular compressor cascade at large incidences have been studied baized on the flow visualization images obtained by means of Laser-sheet method and 7-hole probe measurement.

本文采用激光片光层加示踪粒子流场显示技术，观察和摄取了环形压气机叶栅在约十14大攻角下的内部流动图像；采用七孔气动探针测量了叶栅出口截面上的速度分布S通过对流场实验结果的分析，并结合本文第一部分中得到的叶片近壁区分离流结构，得到了该环形压气机叶棚中严重分离流场的分离流形态和旋涡结构。

Then, safety analysis method was constituted considered the typical damage of concrete beam bridge. 5. By amending the reduction rate of loading capacity used in Code for Maintenance of Highway Bridges and Culvers (JTG H11-2004), a new reliable index is presented in the same safety standard to reflect the relation between load and resistance. According to the basic principal of calibration method, the recommended gradation index was computed under various factors such as different load combinations, vehicle operating status and different failure modes. With these calculated numerical values, the calculated reliability indexes standard for the estimation of safety degree of in-service concrete girder bridge members was ultimately obtained.6. Based on the related standards and results on crack and displacement that cannot continue to loading at home and abroad, the evaluation grade of the concrete beam bridge is proposed by analogy.

针对材料和构件损伤对混凝土梁式桥抗力的影响，基于材料和构件层次典型损伤的修正计算公式，在结构既有以及时变抗力评估的概率模型基础上，通过误差传递公式获得抗力统计参数，对抗力进行修正，构成了考虑混凝土梁式桥典型损伤的安全性分析方法。5、依据校准法原理，将《公路桥涵养护规范》(JTG H11-2004)中不同类别承载力下降率转化为修改分项系数，分别计算了轴心受压、轴心受拉、受弯、大偏心受压、受剪构件在各种情况下的可靠指标，根据破坏类型对校准结果进行分析，提出了基于可靠度的公路混凝土梁式桥安全性评定等级。6、基于不能继续承载的裂缝和位移的相关国内外规范和研究成果分析，通过类比提出了混凝土梁式桥不能继续承载的裂缝和位移评定等级界限。

Methods: Under peridural anesthesia, the right rectus incision was adopted. First, the vessels in lesser curvative of stomach was amputated and ligated. Second, splenic artery was ligated to deflate spleen .Then ,splenic artery and renal vein were amputated and side-to-side anastanosised with each other. Result: Of the 36 cases,the portal free pressure decreased by different degree in 23 cases, unchanged in 10,and increased in 3 postoperatively. The follow-up ranged from 1 to 5 years.

在硬膜外麻醉下经右腹肌切口进腹、采用先作胃小弯的血管彻底离断，再结扎脾动脉、使脾脏缩小后，而后分离出脾静脉和肾静脉进行端侧吻合，结果：36例中23例病人吻合后测得门脉自由压均较分流前有不同程度的降低，10例门脉自由压未变化。3例高于分流前压力。

The computational fluid dynamics method is used to simulate numerically the two phase flow of gas and liquid in a demister with corrugated baffle. The demisting efficiency and pressure drop under various droplet diameters, gas velocities and plate spacings are provided. The effects of main design parameters on the demisting efficiency and pressure drop are analyzed.

用计算流体力学方法对波纹板除雾器内的气液两相流动进行了数值模拟，计算得到了不同液滴直径、进气速度与叶片间距下除雾器的除雾效率和压降，并分析总结了各参数对除雾效率和压降的影响规律。

The piezoelectric activities of the porous PTFE electrets mainly depended on the charge storage ability of the electrets themselves.

研究结果指出：(1)常温下，多孔PTFE驻极体的准静态压电系数d33随充电时间的延长而增加，并呈现出线性区、非线性区和饱和区三个区间，多孔PTFE驻极体的压电活性主要依赖于这类材料的电荷储存能力。

The main reason of decreasing of AC pollution flashover voltage with the dropping of pressure on the simple plane model is the reducing of the requirement of AC arc to develop under low pressure.

由于气压对于交流电弧发展条件的影响程度大于气压对于直流电弧伏安特性的影响，使得低气压下交流污闪电压的下降指数大于直流污闪电压的下降指数。

This article studies the affection of the water ratio of the forage grass to the cube formation, forage density and production ratio.

在机具一定的情况下，以乌梁素海生长的水草为压块物料，进行饲草压块成形试验，着重研究饲草的含水率对草块成形情况、草块密度、生产率的影响。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐