下模

Due to the symmetry of the plate, there are symmetric and antisymmetric mode vibrations with respect to the median plane of the plate.

首先建立了在偏压电场作用下压电介质的运动微分方程，进而根据对称模态和反对称模态的特点，分别在自由表面电学开路和电学短路情况下得到了Lamb波传播的相速度方程。

Methods 40 healthy adult cats were equally devided into group A with sodiumchloride, group B with bFGF, group C with GbE and group D with bFGF+GbE in random. All animals were operated to establish the feline models of cerebral focal ischemia-reperfusion by the approach of left transorbital. The certain madicine intervene were take at 0 h, 24 h, 48 h after the models established. The neurological defects score was evaluated by Philips' criteria score in 1 d and 7 d. The physiological changes were observed by HE stained and electron microscope.

健康家猫40只，随机分为生理盐水对照组、bFGF治疗组、GbE治疗组和bFGF+GbE联合治疗组；采用左侧眼眶入路制作猫大脑中动脉缺血再灌注模型；制模后即刻、24h、48h分别给予相应的药物干预；制模后1d、7d分别进行神经功能缺损评分；制模后7d对脑组织切片进行光镜和电镜下病理及超微结构观察。

Drills, broaches, measuring tools, plastic moulds, sheer blades, guide pins, etc.

适合制作裁剪厚度6mm以下的金属板的下料模及冲压模、螺纹切削刀具。钻头、拉刀、测量工具、塑料模、剪切刀及定位销等。

It is also indicated that the deformation moduli＇ generally increase with the increasing temperature.

在孔隙水压力作用下，围压越高，平均变形模量越高；在围压作用下，孔隙水压力越高，变形模量越低。

After the rigidity matrix calculations, the FEM analysis program ANSYS is used to create models, with the truss structure and box cross-sectioned cantilever board beam as models.

在完成结构刚度矩阵计算的前提下，以桁架结构和矩形截面悬臂板为模型，利用有限元程序ANSYS进行建模，分析了不同类型的结构在温度变化作用下的响应，从而得知温度变化对桁架结构的模态参数影响不大，而对矩形截面悬臂板梁的模态参数有一定的影响。

The activation energy for deformation in W18Cr4V high speed steel, 40CrMnNiMo tool steel for plastic molding and AISI H13 hot-work tool steel are investigated intensively. The investigation shows that the activation energy for deformation of both 40CrMnNiMo tool steel for plastic molding and AISI H13 hot-work tool steel decrease with the increasing of temperature.

分别将这两种钢的变形激活能数学模型用于蠕变模型，并采用这一改进后的蠕变模型对W18Cr4V高速钢和40CrMnNiMo塑模钢的热变形流变应力进行预测，结果表明，此模型不仅能精确描述蠕变条件下工模钢的流变应力变化规律，也能精确描述工模钢非蠕变条件下的流变应力。

Photoresist becomes viscous when heated above its glass transition temperature, so the line of photoresist mask can be smoothened.

为了消除重力的影响，在倒置状态下对光刻胶掩模进行高于其玻璃转变温度以上的烘烤，尽量保证光刻胶线条高度的同时得到了光滑的光刻胶掩模，再结合光刻胶灰化技术，进一步得到小占宽比、平直而且干净的光刻胶掩模。

By simplifying the mechanical model,constitutive relation defined in principal direction based on elasticity theory with different moduli was rebuilt in common ordinates,and tension-compression area was divided.

通过合理简化模型，将不同模量弹性理论中定义在主坐标系下的本构关系重新建立在普通坐标系下，进行拉压分区，从而推导了考虑自重且顶部有水平推力的不同模量弯压柱近似弹性力学解答，并由横截面上正应力为零判定了中性层的形状和位置。

With this method, the change of microstructres and mechanical properties of castiron under the condition of thermo—mechancal cycled load can be obtained, and the failure behavior of the ingot mould can be analysed, which provide impotant bases for optimum design of ingot mould.

利用该实验方法可以再现钢锭模的实际使用状态，可获得在热—力循环载荷作用下铸铁的组织结构及力学性能的变化规律，进一步地可分析钢锭模的各种失效行为，为钢锭模结构优化设计提供重要的依据。

The effect of the thickness on the buckling critical pressure is calculated first.

本文还对减压转油线进行了振动特性分析，研究了总体管道系统在刚性支撑和弹性支撑下的固有频率及振动模态，得出了支撑刚度对固有频率和振动模态的影响；计算了进口端竖直管两种不同的约束方式对减压转油线整体固有频率及振动模态的影响，为以后对转油线进行进一步的振动分析提供了宝贵的数据。

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。