查询词典 excitation

In Nabokov's thought, aesthetic excitation isn't a pure concept, but a complex feeling. It is not only sensuous, but also rational; not only the excitation of the writer in the process of writing, but also the shock of the readers in their resonance with the writer; not only aesthetic, but also showing appreciation of the ugliness.

论文指出在纳博科夫这里，审美狂喜不是一个单纯的概念，而是一种复杂的感受，它是感官的，也是理智的；是作家写作时的亢奋，也是读者共鸣时的震颤；是审美的，同时也是审丑的。

The conventional numerical simulation of a reverberant field as a launch acoustic environment was introduced. Following the reciprocity theorem used in the coupled FE-BE model, the structural response due to reverberant acoustic excitation was substituted by the sound pressure caused by force excitation on the structure, then the output response power spectrum density of the coupled model subjected to reverberant environment was evaluated based on the stochastic analysis principle.

首先介绍了传统的构建混响声场的数值模拟方法；其后利用声振耦合中的互易定理，将混响声场的激励问题转化为结构模型上力激励引起的场点声压响应问题，并采用随机分析原理，用谱分析方法推导了结构在混响声场激励下的响应计算公式；最后建立了航天器典型结构的声振耦合模型，并分别用传统方法和利用互易定理的方法进行了数值模拟。

The effect that external excitation make can improve by manpower, however the self-excitation should through structural design.

外力激振所造成的原因可藉由人力改善，而自激激振所造成的原因必须藉由结构设计来改善。

Now,self-excitation conditions are mathematical formulas under certain postul a te.The model of transient process of self-excitation is linear.

目前，自励磁条件是在一定假设条件下的解析式，而研究自励磁态过程是采用线性模型。

The major factors to make machine tools vibration are external excitation and self-excitation.

工具机所引起振动主要因素为外力激振与自激激振。

Based on the model for self-excitation of synchronous generator and the idea of precise integration algorithm,a concise format of precise integration for fast simulation of the self-excitation is presented in this paper with the saturation characteristic of magnetic circuit of generators taken into consideration.

为此，给出了同步电机的自励磁数学模型，并结合精细积分法的思想，推导出一种形式简洁、仿真快速的精细自励磁积分格式，同时考虑了发电机磁路的饱和特性。

The self-excitation criterion of single-machine is difficult to apply to multi-machine power system, so the mathematical model to judge the self-excitation of all generating sets in multi-machine power system is researched.

1引言随着同步发电机组单机容量的增大和远距离负荷中心电站的建设，以及电力系统容量、电压和输电距离的不断发展和提高，许多问题随之产生，同步发电机的自励磁问题就是其中之一。

Many problems such as generator self-excitation problem may come out, and result in unsafe restoration process, since they are much different from the normal. This paper chooses a simple and approximate method from several existed methods of self- excitation study to present.

由於这一过程中的运行设备和运行参数在某些情况下，与电力系统正常运行状态有所不同，因此可能会出现如自励磁等影响系统安全稳定恢复运行的现象和问题。

Long-span space lattice structures ; simple support excitation ; multiple support excitation ; the aseismatic reliability.

大跨空间网格结构；一致输入；多点输入；可靠度分析

Chapter four studies the chaotic responses in a system consisting of simple pendulum and harmonic oscillator under bounded noise excitation. Firstly, the Melnikov function of the two-degree-of-freedom system under Hamiltonian perturbation is derived. The essential condition of the autonomous system for the probable onset of chaos is obtained, the Poincare maps of the system under small Hamiltonian perturbation and the effect of increasing perturbation on the Poincare maps are studies. Then for the non-autonomous system under damping and harmonic or bounded noise excitation, the largest Lyapunov exponent and Poincare maps are calculated. From the analysis of the largest Lyapunov exponent, the critical criterion for the onset of chaos, and the conclusion that the threshold of bounded noise amplitude for the onset of chaos in the system increases as the intensity parameter of Wiener process increases are obtained. The result from the analysis of Poincare maps is in agreement with that obtained from the Largest Lyapunov exponent. The effect of varying damping coefficient and intensity parameter of Wiener process is also analyzed.

第四章研究了有界噪声激励下的两自由度单摆—谐振子系统的混沌运动，首先推导了该两自由度系统仅在Hamilton扰动下的Melnikov函数，得到该自治系统可能产生混沌的必要条件；研究了该系统在小的Hamilton扰动和增大摄动情形下的Poincare截面；然后对有阻尼、谐和或有界噪声激励下的非自治系统数值计算了其最大Lyapunov指数和Poincare截面；从Lyapunov指数分析得到了这个两自由度系统产生混沌运动的临界条件及产生混沌的临界激励幅值随Wiener过程强度参数值的增大而增大的结论，Poincare截面分析的结果亦符合Lyapunov指数分析的结论；研究了Wiener过程强度参数、阻尼系数变化对Poincare截面的影响。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。