查询词典 excitation energy

The dynamic characteristics of stochastic truss structures and stochastic frame structures are analyzed by using Random Factor Method. Then, from the expressions of structural random response of the frequency domain, the computational expressions of the mean value, variance and variation coefficient of the mean square value of the structural displacement and stress response under the stationary random excitation or non-stationary random excitation are developed by means of the random variable's functional moment method and the algebra synthesis method.

考虑压电智能桁架结构物理参数、几何参数、结构阻尼和外荷载、闭环系统控制电压分别或同时为随机变量，构建了结构在随机力作用下的动力响应分析模型，提出了求解方法，推导出结构动力响应随机变量的数字特征计算表达式，通过算例验证了所建模型和所提求解方法的正确性和有效性。

The C-band magnetically insulated transmission line oscillator has teen simulated by the three dimensional PIC code in order to study the influence of non symmetry excitation mechanisms on its output modes. It is found that the non symmetry excitation mechanisms, such as random emitting of cathode electron anti the long rise tunic and low magnitude of input voltage, could product higher order modes and reduce output power.

为理解磁绝缘线振荡器实验中频频出现的模式竞争问题，利用3维全电磁粒子模拟程序对C波段MILO的实验模型进行研究，探索各种非对称激励机制对产生微波模式的影响，结果显示：阴极电子随机发射、电压的慢上升前沿、较低的电压等因素都可导致非对称高阶模式的产生，并使输出微波功率大大降低。

Based on chapter two, In chapter three, the method of multiple scales is introduced to the study of the multiple-dimensional nonlinear stochastic systems under random external excitation. Using method of multiple scales, we strictly deduce the equation of modulation of amplitude and phase. The effects of random excitations are analyzed; numerical simulations verify the results. Theoretical and numerical simulations show that when the intensity of the random excitation increases, the nontrivial steady state solution may be changed from a limit cycle to a diffused limit cycle.

在第二章基础上，第三章将多尺度法引入到相应的随机系统的研究中；严格推导了系统的约简方程，用矩方法求出稳态解应满足的方程，获得一些结果；并且数值模拟结果与理论推导的结果是一致的；并注意到，与其对应的确定性系统相比较，系统响应从周期解变为近似周期解，系统的相轨线从极限环变为扩大的近似极限环；随着激励带宽的增大，此扩大的近似极限环的宽度将增大。

The advantages of the hybrid CIS-DFT method are that it can determine the symmetry of molecule and the correct order of excitation as well as the Molecular Orbital electron configuration;thereby the electronic excitation states of ethylene are easily derived, and most of them are in agreement with those obtained in experiments or references.

CIS-DFT的优点在于能确定外场下分子的对称性，给出正确的激发顺序以及分子轨道的电子组态，由此导出乙烯分子的激发态，结果与实验一致。

Dus to these reasons, through one tropical year solar excitation, the annual average moving track transfers westward to CIO, even more, under next period of solar excitation, such movement will be resumed on the basis of prior position which is accumulated to form long-term polar movement.

在下一个周年期激发时段，上述现象将在上一回归年极移年平均位置的基础上继续进行，逐年累积即形成长期极移。

Through changing the preignition time and the excitation time of sparkle light source,electric arc light source and trace analyzing light source,the method shortening excitation period for analysis of mid of low alloy steel is studied.

研究了通过改变预燃时间，火花光源、电弧光源、痕量分析光源的激发时间来缩短激发周期进行中低合金钢分析的方法，通过实验将分析周期从34s缩短到23s，从精密度实验、稳定性实验、结果对照来看该方法是切实可行的，并取得了很好的经济效益。

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。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。