查询词典 dynamic data exchange

On the basis of this, this paper tries to seek the common law of each periodic depreciation amount of all dynamic depreciation models and constructs the common model of dynamic depreciation of all assets in order to provide the common models for enterprises to input the relative initial condition to directly use fixed assets dynamic depreciation according to their real situation to calculate the dynamic depreciation amount of each period of fixed assets.

在此基础上，本文试图去寻找各种动态折旧模型中各期折旧额的共同规律，进而建立起固定资产动态折旧的通用模型，以供企业根据自己的实际情况代入相应初始条件直接套用固定资产动态折旧的通用模型，方便地计算固定资产各期的动态折旧金额。

In this topic, the dynamic analysis methods for piezoelectric vibrator are studied systematically based on the theoretical model, FEM numerical experimentation and FEM governing equation for given compound-mode vibrator, and some valuable conclusions are obtained. The main work accomplished is summarized as follows: 1.Elaborate the main modeling methods for piezoelectric vibrator and the significance and necessity to study the dynamic characteristics of piezoelectric vibrator which emphasize the urgency of this paper. 2.Take the bending deformation induced by piezoelectric ceramic as example, the energy transfer mechanism of electric energy to mechanical energy are analyzed; the motion and force transfer mechanism are analyzed for the longitudinal-bending vibrator. 3.Based on mode assumption and Hamilton principle, the coupling model of piezoelectric vibrator of linear USM is built; moreover, the equivalent circuit model is obtained and a coupling equation represents the relation between electric parameters and mechanical parameters is derived which provides foundation to match the vibrator and driving circuit. 4.Combine the constitutive equation of piezoelectric ceramic with elastic-dynamical equation, geometric equation in force field and the Maxwell equation in electric field and the corresponding boundary condition equation, the FEM control equation for piezoelectric vibrator of USM to solve dynamic electro-mechanical coupling field is established by employing the principle of virtual displacement. The equation lays the foundation to study the non-linear constitutive equation of piezoelectric ceramic driven by high-power. 5.Define the dynamic indexes of characteristic of vibrator and carry out variable parameters simulation by calculating the model parameters and the electric characteristics of vibrator are simulated according to the equivalent circuit model. By numerical experimentation, the working mode of vibration of vibrator and the shock excitation results of the working frequency band which provides the mode frequency to realize bimodal are analyzed. Detailed calculation of the electro-mechanical coupling field parameters is made by programming the FEM control equation.

本课题从理论模型、有限元数值试验、有限元控制模型等方面以复合振动模式振子为例对超声电机压电振子的动力学特性及其分析方法进行了全面系统地研究，得出了许多有价值的结论，主要概括如下： 1、阐述了目前针对超声电机压电振子的主要建模方法，对压电振子动态特性的研究意义和必要性进行了论述，突出了本文研究内容的迫切性； 2、以压电陶瓷诱发弹性体发生弯曲变形为例，分析了压电陶瓷通过诱发应变来实现机电能量转换的机理；对基于纵弯模式的压电振子的运动及动力传递机理进行了分析； 3、基于模态假定，利用分析动力学的Hamilton原理，建立了面向直线超声电机压电振子的机电耦合动力学模型，并据此建立了压电振子的等效电路模型，导出了电参量与动力学特性参量的耦合方程，为压电振子与驱动电路的匹配提供了依据； 4、从压电陶瓷的本构方程出发，综合力场的弹性动力学方程、几何方程、电场的麦克斯韦方程以及相应的边界条件方程，采用虚位移原理，建立了压电振子动态问题机电耦合场求解的有限元控制方程，为研究其大功率驱动下的非线性本构模型奠定了基础； 5、界定压电振子的动力学特性指标，对压电振子的机电耦合动力学模型参数进行计算及变参数仿真；依据等效电路模型，对压电振子的电学特性进行了仿真分析；通过有限元数值实验，对压电振子工作模态附近的模态振型及工作频率附近的频段进行了激振效果分析，找出了实现模态简并的激振频率；利用有限元控制方程，通过编程计算，对压电振子的力电耦合场参数进行了详细计算，得出了一些有价值的结论。

The mathematical models of the dynamic target and the tested apparatus are constructed with spherical trigonometry spherics. The general structure of the dynamic target is introduced. The performance, the detail of structure and selection of material of its main components are studied. The mass center and dynamic precision of the dynamic target, the static deformation of rotation arm are calculated and analyzed.

本文主要介绍了新型动态靶标研制的必要性、动态靶标检测的原理；运用球面三角学，建立了动态靶标与被测仪器间的数学模型；介绍动态靶标的总体结构设计，对各重要组成部分的功能、结构及原材料的选择等进行了详细的分析；对动态靶标的重心、旋转臂的静态变形及整机的动态精度进行了分析和计算；最后介绍了动态靶标的标定方法。

As the first step of the research on the dynamic in structure, this thesis mainly discusses the labeled and mono-linear dynamic, some of which may be related to the unlabeled dynamic and comprehensive dynamic.

作为对结构中力度研究的初期，本文中主要论述有标记的、单一线条的力度，其中部分会涉及无标记的力度和综合力度。

In order to study the dynamic characteristics of the system, a dynamic model was proposed by using the lumping method and dynamic simulation of the space solar-dynamic power system with electrical output power of 10 kW was performed.

为了掌握空间太阳能热动力发电系统各参数的动态变化规律，采用集总参数法，从部件的数学模型出发，根据各参数间的相互耦合关系，建立了空间太阳能热动力系统的动态数学模型，对10 kW空间太阳能热动力发电系统的运行过程进行了动态数值模拟。

This paper synoptically expatiated the development and research actuality of soil dynamics ,summarizing the actuality and development on dynamic constitutive model and dynamic analysis of soil mass,emphasizing on dynamic elastic-plastic model and dynamic elastic-plastic analysis under complicated load.

阐述了土动力学的发展现状及研究进展，综述了目前土体动力本构模型、动力分析现状和进展，以及复杂荷载下的动力弹塑性模型和弹塑性动力分析，其前景广阔。

Test results are as follows: Ballastless track structures can effectively improve the dynamic action of train loads on subgrade beds, the measured stresses and acceleration rates are far smaller than those measured with ballasted track structures; axle loads have remarkable influence on dynamic stresses of ballastless track subgrades and have some influence on acceleration responses; speeds of either motor car units or freight trains all have limited effect on dynamic embankment responses; after attenuating over 3 meters high embankment, neither dynamic stresses nor acceleration rates are influential to net cushions at the bottom of column-net structure subgrades

结果表明：采用无砟轨道结构可以有效改善列车荷载对路基基床的动力作用，测得的动应力与加速度值均远小于有砟轨道结构测得的值；列车轴重对无砟轨道路基的动应力影响明显，对加速度响应也有一定影响；无论是动车组还是货物列车，其运行速度对路堤部分的动响应影响均有限；动应力与加速度经3 m 高的路堤后衰减，对桩网结构路基下部的网垫层已基本无影响。

Then a dynamic inversion tracing control method and a dynamic inversion fuzzy integrated control method are used to design depth control systems for a torpedo respectively. The simulation results illustrate that dynamic inversion fuzzy integrated control method can solve the problem of torpedo depth control more satisfactorily than the dynamic inversion tracing control method can.

提出了基于动态逆的跟踪控制方法和动态逆模糊集成控制方法，并分别将这两种方法用于鱼雷深度控制中，通过仿真说明动态逆模糊集成控制方法比基于动态逆的跟踪控制方法更好地解决了鱼雷的深度控制问题。

The main content will be about dynamic mode of recruiting, dynamic mode of teaching, dynamic mode of testing, dynamic mode of school roll management, and so on. Some peripheries are also discussed for further research.

特别对动态招生模式、动态教学模式、动态考试模式和动态学籍管理模式等发表了作者的见解，另外，在其它一些方面，也谈了作者的部分想法。

Based on the background given above, this dissertation studies the theories and technologies related with dynamic balancing , makes full use of DSP chips wonderful computational performance, finally researches and designs a portable dynamic balancing system, simplifying the field dynamic balance of rotating machines. Besides, a new method named Order Tracking Based On Phase is presented, which realizes order tracking purely by software. This method simplifies the hardware set for dynamic balancing and has the definitude physical meaning.

基于这样的背景，本文在对动平衡原理及技术方法深入研究的基础上，利用DSP芯片的高计算性能研制便携式嵌入式动平衡系统，使得旋转机械的现场动平衡工作更为简化方便；同时对与动平衡信号处理密切相关的阶比跟踪方法进行了深入研究，在此基础上提出了基于相位的阶比跟踪方法。

Sodium citrate; calcium carbonate; calcium hydroxide; potassium bicorbonate; magnesium carbonate; ferrous sulphate; Zinc sulphate; copper sulphate; manganese sulphate; potassium iodide; sodium selenite.

柠檬酸钠；碳酸钙；氢氧化钙；碳酸氢钾；碳酸镁；硫酸亚铁；硫酸锌；硫酸铜；硫酸锰；碘化钾；亚硒酸钠。

All this to say that I'm glad filmmaking hasn't become completely ironic. I can enjoy an ironic film as much as the next person, but they usually involve a message of some sort. One that's delivered in a smirkingly clever way that requires little in the way of talent.

所有这些都是说，我很高兴电影制作没有变成完全讽刺艺术，我可以和下一个人一样享受讽刺电影的乐趣，虽然他们经常会被划归到一定级别，技术方面不需要很高的才能。