瞬态

The jet formation of nitromethane is taken shadowgraphy first, and effective discharge coefficient with a nozzle diameter of 2. 5mm is presented.

以再生式液体发射药火炮为工程背景，我们首次拍摄了硝基甲烷射流喷射瞬态变化过程，并实验测定了硝基甲烷从直径2.5mm直喷嘴喷射时的流量系数。

In this thesis, transient problem of three dimensional dynamic interaotion is investigated for thick cylindrical shell in semi-infinite media under shock load. An analytical solution--boundary element coupling method is presented.

本文研究半无限介质中圆柱厚壳受冲击荷载作用，与介质三维动力相互作用的瞬态响应问题，提出一种解析解——边界元耦合方法。

It is of great significance to study the electromagnetic coupling of the transient electromagnetic field to shielded cable for improving the electromagnetic anti-interference ability of the secondary equipments in substation.

研究变电站瞬态电磁场对屏蔽电缆的电磁耦合问题，对于提高变电站内二次设备的抗电磁干扰能力具有极为重要的意义。

Streak tube imaging lidar is a new type of flash laser radar,and its receiving detector is the transient optical streak tube. The characteristic of STIL is of wide field of view and high resolution. It has two types,single slit and multiple slits.

条纹管激光成像雷达是近10年发展起来的一种新型闪光式激光成像雷达，以瞬态光学器件条纹管作为探测接收器，可做到大视场、高分辨，分单狭缝和多狭缝两种体制。

In cases of transient insomnia, the sleeplessness persists for a period of few days to a week.

案件中的瞬态失眠，失眠存在的期限为几天到一个星期。

In the contact modeling of thermal-structural coupling, transient rolling plus sliding contact leads to heat generation.

6采用热-结构耦合方法，研究了轮轨接触面在瞬态载荷作用下，摩擦热的生成和传导过程。

Some efforts were made to improve the computational efficiency of the mold filling simulation of die casting process. To speed up the convergence of the pressure field and speed field, the SOLA method was modified and a dynamic iteration direction method was put forward.

通过对SOLA算法中迭代方法的改进和采用"动态迭代方向"法，加速了流场计算的迭代收敛速度；通过引进"瞬态层"概念，大大简化了流场耦合温度场计算时的计算规模，提高了计算效率。

Besides, ways to implement discrete methods in both time domain and space domain during the solution of the problem are investigated.

本文给出了冲击负荷下发电机端部三维瞬态涡流场的边值问题，并阐述了求解该问题时在空间、时间上的离散方法。

It is studied in detail in this thesis, and a new method taking into account relative motion between inhomogeneous media is developed. By using the novel finite element method, the transient performance of a cylindrical linear induction motor with squirrel-cage secondary is computed.

在瞬态问题的研究中，媒质非均匀性的处理是一个棘手的问题，文中对此进行了分析，提出了一种新方法，很好地解决了非均匀媒质间相对运动的问题。

The paper outlines the general design method for the minimum beat systems, an discussion on the role of the staleness weighting factor in improving transient response performance of digital control systems and the method to introduce the staleness weighting factor alongwith examples applied in practical engineering systems.

本文概述了最少拍系统的一般设计方法，讨论了失效加因子改善数字控制系统瞬态响应性能的作用，以及引入失效加权因子的方法、并给出了它们在实际工程系统设计中应用的例子、对完善最少拍系统设计方法在工程上的应用具有一定的价值。

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