下壳

The application of laser cutting during the welding of bridge case was used to improve the technology of blanking.

在桥壳的焊接中，应用激光切割的方法改进冲裁下料工艺，较好地解决了传统下料工艺中存在的割缝质量差的问题，同时还降低了生产成本，提高了焊接效率。

Then, for the first time, a finite element model of the cylindrical shell surface was bring forward and set up.

首次提出和建立了柱体坐标系下的曲面柱壳单元有限元模型，以及在柱坐标系下的边界元法基本方程和柱坐标系下无限域与半无限域基本解。

An amount increase ofPAI-3 andK10 was observed after theKCswere cultured for48 h in high calcium medium,butat72 h the exprssion ofPAI-3 decreased. The positive stain ofPAI-3 wasmainly localized in perinuclearmembrane in lowcalcium medium and in cytoplasm in high calcium medium. PAI-3 was incorporated into cornified envelope ofterminally differentiated keratinocytes.

结果 高Ca2+浓度下培养24 h后，分化标记物K10弱阳性表达， PAI-3呈阳性表达；培养48 h后， K10强阳性表达，而PAI-3的阳性表达明显增加， 72 h后，表达开始降低，在低Ca2+浓度下阳性染色主要位于细胞核膜周围而高Ca2+浓度下主要位于细胞质，同时， PAI-3存在终末分化KCs角质壳中。

Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.

本文针对某5.56mm自动步枪在工作中出现断壳的问题，分析了弹壳在轴向拉力作用下的应力应变；基于弹塑性力学及接触理论，建立了弹壳弹膛系统的数学、物理学模型，在通用有限元ANSYS软件的参数化建模工具APDL平台上，建立了弹壳弹膛系统的参数化模型；采用非线性有限元法计算了弹壳弹膛系统的整体应力，引入接触单元法分析弹壳和弹膛的接触压力，探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响；本文进行了大量的尝试，最后确定采用热、结构耦合单元Plane13，在计算中加载了火药气体的温度历程，成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解，考虑因素全面，比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。

A high-precision liquid filter includes a liquid treating device among which the interior has a filtrating device with filter screen along the periphery set up, the lower end of its one side is the liquid inlet, and the upper end is the treated liquid outlet and the lower end is the impurity outlet, a steel plate for hoisting the filtrating device is set up in connection below the cover shell at the upper end of liquid treating device in which or on its outside a magnetizing device is further set up and on its bottom two stands are fixed.

高精度液体过滤器，包括一液体处理装置，其中内部设置有周缘设置有滤网的过滤装置，其一侧下端为液体入口，上端为处理过的液体出口，下端为杂质出口，处理装置上端盖壳下连设一用以吊设过滤装置的钢板，液体处理装置内或外侧还设置有一磁化装置，液体处理装置底部设有两支架。

The mechanical properties of pure chitosan scaffolds, pure collagen scaffolds, composite single-layered scaffolds and biomimetic multilayered scaffolds were compared.

对比了纯壳聚糖支架、纯胶原支架、胶原壳聚糖复合材料单层支架和仿生多层支架在干燥和湿润两种状态下的力学性能。

Finally, the paper provides the checking computations of themost dangerous cases of the cast ball-and-socket support node planned to be use in thedouble-layer reticulated dome roof of Laoshan Cycling Gymnasium for BeijingOlympic Games. The node under most dangerous cases is analyzed by ANSYS7.0 toget the distribution of stress and assurance coefficient. All these results can be thetheoretical warranty for the use of project of Beijing Olympic Games

最后，对北京奥运会老山自行车馆双层球面网壳柱脚拟采用的铸钢球铰支座节点在最不利工况下节点承载力进行了验算，并通过ANSYS7.0对节点在最不利工况下的应力分布进行分析得出了节点在这些工况下的安全系数从而为在北京奥运会老山自行车馆工程中使用这些节点提供了理论依据。

Thirdly, a series of agricultural biomass, including corn stalk, corn cob, wheat stalk, rice straw, rice shell, peanut shell and broomcorn stalk, was gasified at the same conditions.

继而，以多种农业生物质（包括玉米秸秆、玉米芯、麦秸、稻草、稻壳、花生壳、高粱秆）为原料，在相同的反应条件下，考查不同生物质在超临界水中的气化效果。

It was revealed that the relative competitive adsorption capacity of fibrinogen was much larger than that of BSA. The result confirmed that chitosan, as other common haemostatic, would adsorb blood protein and activate platelet and coagulation factor for clotting.

比较壳聚糖膜上BSA与牛血纤维蛋白原在生理条件下竞争吸附的情况，在壳聚糖界面上，牛血纤维蛋白原的相对竞争吸附能力要大于BSA。

Themapping function sequences including circular cutouts and elliptical cutouts aregiven in this chapter.

然后为方便地满足圆柱壳大开孔的边界条件，通过复变函数方法中的用来求解多边形映射问题的Schwarz-Christoffel积分表达式，将圆柱壳展开面上的非圆非椭的开孔边界曲线保角映射成为单位圆，给出了在不同开孔率情况下的关于圆孔和椭圆孔的保角映射函数的具体形式。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。