原理

Elaborated the punching components formation principle the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machiningthe drawing and punching compound die with float punch-matrixthe drawing and cutting compound dies with unaltered pressthe compound die for the back bowl of the noise keeperthe design of the compound die which could produce two workpieces in one punchingthe bending die for the ring shape part the bending die which used the gemel automate loading die for cutting the drawingpunching and burring compound dies with sliding automated loadingthe punching die for the long pipe with two row of holethe drawing die for the square box shape workpiece and the burring die for the box shape workpiece.

本文对冷冲压技术的分类、特点及发展方向作了简略概述；论述了冲压零件的形成原理、基本模具结构与运动过程及其设计原理；对典型的冲压件模具进行了设计：大直径三通管冲压复合模设计解决了大直径三通管的加工难题、带有浮动凸凹模的拉伸冲孔复合模设计、适力压边式落料拉伸切边复合模设计、消音器后补碗落料、拉深、冲孔、翻边复合模设计、一模两件落料拉伸冲孔翻边复合模设计、环形弯曲件的模具设计、铰链卷圆成形工艺及模具设计、半自动送料切角装置设计、滑板式送料拉深、冲孔、翻边模设计实现自动送料、长管多孔冲模设计、带凸缘台阶方盒形零件拉深模和盒形件侧壁小孔翻孔模。

At last, Hartree-Fock and Density Functional Theory was used to calculate the Mulliken bond orders, HOMO and LUMO. The "principle of the smallest bond order" and the "principle of the easiest transition" were selected to judge the decomposition potential of the nitration products, and the results indicated trinitrotoluene would decompose easier than other product, and it was consistent with the experimental results.

最后，采用Hartree-Fock方法和密度泛函方法计算了各硝化反应中主要有机物的Mulliken键级、最高占有轨道能和最低空轨道能，采用&最小键级原理&和&最易跃迁原理&判断出三硝基甲苯最易分解，这与实验结果一致。

This paper described the principle of plane ultrasonic spreading abroad in the liquid coming into being ultrasonic grating,educed the density and refractive index changing rule basis continuity equation of not-ideal liquid and Lorentz-Lorenz law,expressing the transformation of the index and refractive index satisfaction similar equation of standing wave,and described the relation curve of the standing wave form at a few special times,liquid density and refractive index periodic variety according to the res...

描述了平面超声波在液体里传播形成超声光栅的原理；根据非理想流体对应的连续性方程和Lorentz-Lorenz定律，推导了液体光栅中液体密度与折射率的周期性变化规律，表明液体密度和折射率变化满足相似的驻波方程；根据推导的结果描绘了几个特殊时刻的驻波波形、液体密度、折射率周期性变化之间的关系曲线；进而由折射率周期性变化规律分析了超声驻波自身像的形成原理，并给出了CGS型超声光栅声速仪利用超声驻波自身像测量声速的方法与实验结果。

Distribution of Direct Drive Type Solenoid Valve The distribution of direct-action solenoid valve works: it is a direct-acting and pilot-style combination of theory, when the entrances and exits when there is no differential pressure, electricity, the electromagnetic force directly to the pilot valve and main valve off small pieces turn up raised, the valve opens.

分布直动式电磁阀分布直动式电磁阀的工作原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，阀门打开。

Distribution of Direct Drive Type Solenoid Valve The distribution of direct-action solenoid valve works: it is a direct-acting and pilot-style combination of theory, when the entrances and exits when there is no differential pressure,气动阀, electricity, the electromagnetic force directly to the pilot valve and main valve off small pieces turn up raised, the valve opens.

分布直动式电磁阀分布直动式电磁阀的工作原理：它是一种直动和先导式相结合的原理，当入口与出口没有压差时，通电后，电磁力直接把先导小阀和主阀关闭件依次向上提起，排气阀，阀门打开。

Then the intellectual control technology of vacuum circuit breaker is discussed particularly. As a control object, the bi-stable permanent magnetic actuator is separated into basic principle so as to determine the nature of the whole. The direct-coupled models of magnetic fields for analysis and for calculation are presented. The static and dynamic characteristics of the models and dynamic behavior analysis and matching analysis for the vacuum circuit breaker with bi-stable permanent magnetic actuator are also discussed. For a further study, fuzzy neural network control technology based on synchronized-closing operation of vacuum circuit breaker is analyzed and the research conclusion is used for realizing the synchronized-closing of vacuum circuit breaker in the future.

论文首先分析了永磁机构的结构和工作原理；然后主要针对双稳态永磁机构真空断路器分析了在开断和关合过程中的静态磁场耦合模型、动态分析数学模型和真空断路器的动态特性，并就永磁机构和真空断路器的匹配进行了分析；最后分析了基于双稳态永磁机构真空断路器的同步操作问题，深入研究了同步操作的模糊控制原理和算法，研究结果为最终实现永磁机构真空断路器的同步操作奠定了基础。

Based on analysis to the principle of back-to-back converter for direct-driven variable speed constout frequency WECS,phase lock loop based sensorless control strategy was adopted to determine the speed and phase angle of PMSG,and its work principle and realization method are analyzed in detail.

在分析直驱型变速恒频风电系统背靠背变流器工作原理的基础上，采用锁相环无速度传感器控制策略对永磁同步发电机的速度和相位进行观测，对其工作原理和实现方法进行了分析。

It analyzes the structure feature of all parts in the novel grinder and motion principles, which establish the base for producing the drill grinder. The research on grinding mechanism and development of the novel drill grinder fill the blank at home and abroad, which will bring large economic and social benefits.

新刃磨原理的研究和新型钻头刃磨机的研制，填补了国内的空白，类似原理的刃磨机国外也未见报导，将带来较大的经济效益与社会效益。

This thesis analyzes the drill grinding methods and the grinding mechanism of the novel drill, and studies how to grind the novel drill conveniently and high efficiently. Then a special drill grinder with new mechanism is developed.

分析了钻头刃磨方法和新刃形钻头的刃磨原理，研究如何方便、高效地磨出所提出的新钻型，在此基础上进行了新原理专用钻头刃磨机的研制。

Firstly, the variety and structure of the driving drum for belt conveyor is introduced. Thestress condition of the driving drum is analyzed combined with the working principle of thebelt conveyor.

首先，本文介绍了带式输送机工作原理和传动滚筒的种类及结构，并结合输送机的工作原理对传动滚筒的受力情况进行了分析。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。