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Fluent software was used as a calculaˉ tion platform, and its UDF compiler was used to inject mass, mome ntum and energy of ignition gas and propellant gas into chamber. Combining with kˉε twoˉequation turbulence model and Pˉl radiation model, the 3ˉD nume rical simulation of ignition transient process of some solid rocket motor with st arˉshaped charge and a cove was conducted.

文中以Fluent软件为计算平台，采用UDF编译来实现点火燃气和推进剂燃气的质量、动量、能量向燃烧室的注入，结合 kε两方程湍流模型、 P l 辐射模型对某有堵盖的星形装药固体火箭发动机的点火瞬态过程进行三维数值计算。

The basic equations of centrifugal pump on steady and unsteady process were educed based on theory of momentum and moment in order to analyze the transient hydrodynamic performance of centrifugal pump.

为了对离心泵快速开启过程的瞬态效应进行分析，根据动量矩定理分别推导转速稳定和不稳定时的离心式水泵基本方程式，给出了叶轮旋转加速和流体加速对性能影响的数学描述方程，为进一步理论分析和数值计算打下基础，并结合一台快速启动的混流泵进行实例分析。

The basic equations of centrifugal pump on steady and unsteady process were educed based on theory of momentum and moment in order to analyze the transient hydrodynamic performance of centrifugal pump. The equations were used to describe the influence of accelerating rotation of impeller and accelerating motion of fluid on hydrodynamic performance.

为了对离心泵快速开启过程的瞬态效应进行分析，根据动量矩定理分别推导转速稳定和不稳定时的离心式水泵基本方程式，给出了叶轮旋转加速和流体加速对性能影响的数学描述方程，为进一步理论分析和数值计算打下基础，并结合一台快速启动的混流泵进行实例分析。

The transient expression experiment with gus gene showed that mwcsllO promoter was induced by high salt and low temperature and promoted expression of structural genes in both monocotyledonous and dicotyledonous plants.

对gus基因瞬时表达实验表明，在单子叶和双子叶植物中，mwcS12O启动子均受低温和高盐逆境诱导，启动结构基因的表达，显示其在作物抗逆基因工程改良中的应用前景。

In this thesis, we propose two pulse generators whose pulse amplitude is adjustable. These pulse generators use the second-order transient circuit at over-damping mode to generate the adjustable monocycle pulse with good symmetry and low ringing in the simulation and measurement.

本论文提出两个脉波高度可调的脉波产生器，主要观念在於利用RLC二阶暂态来产生脉波，并利用过阻尼响应来降低脉波尾端的涟波，从模拟与量测中可验证此特性。

The result showed that the order of non-polio AFP disease chart was non-polio enterovirus infection, Guillain-Barre syndrome,injured neuritis,quadriplegia and monoplegia,myopathy, transverse myelitis,radiculitis,transient paralysis of limb and the other diseases.

结果表明，湖北省1995年非脊灰AFP病例疾病谱的顺位为：非脊灰肠道病毒感染、格林巴利综合征、创伤性神经炎、四肢瘫和单瘫、肌病、横断性脊髓炎、神经根炎、短暂性肢体麻痹等。

As required by the working features of monostable flip flops, the design idea of monostable flip flops with RC circuit as the timer unit is explained by using the transient phenomenon of signal changing resulted from the differential circuit or from "the static race hazard of signal", and by linking the storage principle of signal feedback.

根据单稳态触发器工作特点的要求，以RC电路为定时单元，利用微分电路及"信号静态竞争冒险"等信号瞬变现象，并结合信号反馈存贮的原理，阐明单稳态触发器的设计思想。

MPT control technique is easy to realize, with great robust ness and good transient performance.

MPT控制方法易于实现，控制系统具有良好的瞬态特性和鲁棒性，可以应用于各种拓扑结构的开关变换器。

In order to analyze transient and steady thermal behavior of GTO device, a strategy to decide GTO's heat transfer model is presented with multipartite LMS method.

为分析器件的瞬态和稳态热特性，提出了用最小二乘法分段拟合GTO传热模型的策略。

Neural crest cells are a transient population of multipotent progenitors that give rise to numerous cell types in the embryo.

神经嵴细胞是一个暂时性的原生代细胞，在胚胎可发生很多类型的细胞。

Go to your desktop and right click in a blank space.

请到您的桌面，然后右击一个空白。

Tara appears in Buddhism, Jainism, and particularly, Tibetan Lamaism, as a complex array of manifestations: goddess of ascetism and mysticism, mother creator, protectress of all humans as they cross the sea of life.

度母出现在佛教，耆那教里面，尤其是西藏的喇嘛教，作为一系列的陈列阵容；神秘的女神，创世之母，人类横过生命之海洋的女性保护者。