查询词典 diesel-electric

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。

Zhenrong Company main products are: box-type furnace, furnace cars, Pit Carburizing Furnace, Pit Type Furnace, Pit nitriding furnace, electric oven blast, salt-bath furnace, mesh belt electric furnace, new coal-fired reverberatory furnace, rod heat treatment furnace, glass-lined equipment, resistance furnace and various industrial furnaces, and undertook a variety of industrial electric furnace repair and supply of various electric fittings.

振荣公司主要产品有：箱式炉、台车炉、井式渗碳炉、井式回火炉、井式氮化炉、电热鼓风干燥箱、盐浴炉、网带式电炉、新型燃煤反射炉、抽油杆热处理炉、搪玻璃设备电阻炉及各种工业用炉，并承接各种工业电炉的维修及供应各种电炉的配件。

Electromagnetics course mainly including basic phenomena and laws of electro- magnetics, electrostatic field in vacuum, in conductor and in electric medium, electric energy, stabilized current, stabilized magnetic field and its basic laws, electric and magnetic fields caused by a moving chager in lower speed, the transform of electric and magnetic fields between different systems of coordinates, inductive laws, eddy field, self inductance, mutual inductance and transient, molecule current and magnetic substance, ferromagnet, boundary conditions, magnetic circuit theorem, energy of magnetic field and density of magnetic energy, displacement current, Maxwell's equation, electromagnetic wave, Poynting vector.

电磁学课程的主要内容包括：静电的基本现象和基本定律，真空中的静电场，导体和电介质中的静电场，电场的能量与电场能量密度，稳恒电流，稳恒电流磁场的基本定律，运动电荷的电磁场，不同参照系之间电磁场的变换，电磁感应定律，涡旋电场，互感，自感，暂态过程，分子电流与磁介质，铁磁体，边界条件，磁路定理，磁场的能量和磁能密度，位移电流， Maxwell 方程组，电磁波和玻印廷矢量等。

In the electric motor soft start question, uses the crystal thyratron intelligence module which controls by the singlechip to change the electric motor the initial firing current, the realization soft start; In the protection question, uses the singlechip to monitor the electric motor the movement, to lacks the breakdown implementation to separate the electrical machinery movement immediately, according to certain algorithm judgment electric motor whether crosses the class, like tallies has flowed the condition is the separation electrical machinery movement.

在电动机软起动问题上，采用由单片机控制的晶闸管智能模块改变电动机的起动电流，实现软起动；在保护问题上，采用单片机监视电动机的运行，对缺相故障实行立即断开电机运行，根据一定算法判断电动机是否过流，如符合过流条件即断开电机运行。

Beijing hung Electric Vehicle Co., Ltd. is a master of domestic electric vehicles, hybrid electric vehicle design and production of one of the manufacturers, the main design and manufacture of environmental protection, safety, energy-efficient new electric vehicles, currently has a tourist vehicles, car clubs, golf carts, flatbed, tractor and so on 5 big series more than 30 varieties.

北京鸿马斯特电动汽车有限公司是国内电动汽车、混合动力汽车设计和生产的厂家之一，主要设计和生产环保、安全、节能的新型电动汽车，目前已形成旅游观光车、会所用车、高尔夫球车、平板车、牵引车等5大系列30多个品种。

That is, the appropriate electric field should be a uniform electric field in the strength of 1.0V/cm with the reversal time interval of 10 min in rhizosPHere soil; while the appropriate electric field should be a uniform electric field in the strength of 1.5V/cm in non-rhizosPHere soil.

施加均匀场1.0V/cm的同时，每隔10min切换极性，是土壤根际微生物群落在电场作用下比较合适的电场条件；而对土壤非根际微生物来说，施加均匀场1.5v/cm是相对比较合适的电场条件。

On the foundation of further analyzing present situation of our electric transmission price regulation, unifying concrete characteristic of electric transmission enterprises and rod competition theory and achievement rod method,proposed a comprehensive electric transmission price control model which combines price upper limit control and rod competition control,especially a measure model of production efficiency of electric transmission enterprise based on Malmquist index.

3对电力传输企业标竿激励涉及的绩效评价的技术方法、以及标竿激励规制方法和过程进行考察的基础上，进一步分析我国电力传输价格规制现状，结合我国电力传输企业的具体特征以及标尺竞争理论和绩效标竿方法，提出了价格上限规制和标尺竞争规制相结合的综合输电价格规制模型，特别是提出了基于Mulmquist指数的电力传输企业的生产效率的测度模型，并综合输电价格规制模型规制目标、结构设计、输入因素以及+/-Z的X因子以及Z因子的设定进行了深入的研究。

Our plant develops usualness inter-access technology communication with more than ten international famous electric furnace manufacturing companys,and repeated visits to the foreign advanced electric furnace factories and institutes every year, learning and absorbing foreign advanced industrial furnace manufacturing technology and production processes, technology, special components of electric furnace improving technology, product upgrading technology, it makes our plant keep synchronization with the international advanced industrial furnace manufacturing technology no whether in the type,the updating of furnace, fundation material progress, components manufacturing technology progess , manufacturing automation, and the way the loading of the loading basket manufacturing technology, WDS lining energy saving techniques, ceramic fiber wave of high pressure tied ceiling stack technology, oxidation-free protection atmosphere, carburizing, nitriding, molten, salt bath, nitrate Austempered, precision heat treatment process, equational flow and temperature heat transfer asymmetric quenching tank manufacturing technology, microcomputer program heat treatment technology curve temperature control process , and so on can keep pace with internationa advanced industrial electric furance manfacturing technology.

我厂与国际十多家著名电炉制造公司开展经常性互访技术交流，每年多次前往国外先进电炉制造厂和研究所，学习并吸收国外先进的工业电炉制造技术和生产过程，工艺技术，电炉专用零部件改进技术，产品更新换代技术，使我厂工业电炉产品无论在品种类型，炉种更新，基础材料进步，零部件制造技术进步，制造工艺自动化，装料方式和装料筐制造技术方式，WDS炉衬节能技术，陶瓷纤维波浪叠法高压捆扎吊顶技术，无氧化保护气氛，渗碳，氮化，盐浴，硝盐等温淬火，精密热处理工艺，均流均温换热不对称淬火油槽制造技术，微电脑程序热处理工艺曲线控温等各个方面，能够与国际上先进工业电炉制造技术保持同步。

Analyze the characteristic and virtues of the electric balancing valve,Analyze the difference between the electric balancing valve and the electric valve,Introduce that the electric balancing valve is a integrative product with the functiongs of dynamical balancing and electrical regulating ,Introduce the application and virtues of the valve in Variableness flowrate system,Introduce the concept of All Balancing in Variableness flowrate system and characteristic of high-effiiciency and energy saving and how to come it true

摘 要：本文分析了动态平衡电动阀的特点及与传统的电动阀相比较的优点；揭示了动态平衡电动阀是区别于传统电动阀的产品，是动态平衡与电动控制一体化的产品；介绍了这种阀的应用及在系统负荷波动较大的变流量系统中的优势，同时提出了变流量水力系统全面平衡的概念、高效节能的特点及实现途径。

This is a professional production the company of new and high technology of equipment of instrument of test of electric power of management high pressure, equipment of test of high pressure of main development electric power and power source, electric power checks instrument appearance, wattmeter to measure an instrument to wait for a product, apply extensively at a variety of industries such as electric power, irrigation works, oil.

这是一家专业生产经营高压电力测试仪器设备的高新技术企业，主要开发电力高压试验设备及电源、电力测试仪器仪表、电力计量仪器等产品，广泛应用于电力、水利、石油等多种行业。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"