查询词典 three-hour

With theoretical analysis, three-phase general PFC controller based on One Cycle Control for three-phase three-switch rectifier is deduced.

完成了7kW的基于单周期控制的三相高功率因数整流器的方案设计，并给出了相应的仿真结果和试验验证。

The company main product are single phase mechanical KWH meter, three phase mechanical KWH meter, single phase electronic meter, three phase electronic meter, single phase prepaid meter, three phase prepaid meter, limit switch, micro switch, foot pedal switch, adjust switch, safety switch, cutout limiter, double-way rope pulling switch, double-way bias switch, self-lock foot pedal switch, high voltage switchboard switch, limit switch with light display, multi function limit switch, slide-stop switch, fire-control push button switch, signal light, mini circuit breaker, connector fuse cut-out, automatic photo-controls, American 6 pole computer plug.

公司主要产品：单相机械式电度表、三相机械式电度表、单相电子式电度表、三相电子式电度表、单相预付费电度表、三相预付费电度表、行程开关、微动开关、脚踏开关、限位开关、安全开关、断火限位器、拉绳开关、跑偏开关、自锁式脚踏开关、高压开关柜限位开关、带灯显示行程开关、多功能行程开关、打滑开关、消防按钮开关、信号灯、小型断路器、熔断器式保险插座、路灯控制器、美式6孔电脑插座。

On this basis, using the same theories and methods, we set up the three-dimensional steady-state models of ideal well productivity about a reverse double-branch horizontal wells, the three branches of radial horizontal wells, fish-bone shape three branches horizontal wells and two-dimensional four branches horizontal wells In five reservoirs respectively.

在此基础之上，运用同样的理论和方法，建立了反向双分支水平井、辐射状三分支水平井、鱼骨形三分支水平井和二维四分支水平井这四种分支水平井分别在以上五种油藏中的三维稳态理想井产能模型。

In each selection period in which three scanning electrodes 312 are selected, a signal-electrode driving circuit 250 compares a bit string in accordance with the column elements corresponding to the selection of the scanning pattern with each of bit strings, which consists of a bit in each position of pieces of gray-scale data D for three pixels at the intersections of a signal electrode 212 and the three scanning electrodes 312, and conversion data Dt is generated in accordance with the comparison results.

信号电极驱动电路250在选择3条扫描电极312的各选择期间，将扫描图形之中与对应于该选择的列的要素相对应的位列，与将对应于信号电极212与该3条扫描电极312的交叉点的3个像素的灰度数据D中包含的由各位的位构成的位列进行比较，生成对应于该比较结果的变换数据Dt。

This problem is also important and valuable in Nonlinear Optics. It will be very helpful to understand how the aberrations affect the course of three- wave mixing, such as the change of conversion efficiency, the distribution of intensity and phase.Small signal solution of aberrated second harmonic generation is deduced from three-dimension three wave coupling functions. The numerical work gives out lot of results of different aberrations. The effects of the fundamental waves aberrations, which will change the conversion efficiency, distribution of intensity and phase in the frequency conversion, is analyzed. It shows that when walk-off and diffraction effects could be ignored approximately estimation of the phase distribution of second-harmonic wave could be done. The far field divergent angle and second moment radius of harmonic wave will vary with the aberration of fundamental wave, but the far field divergent angle will be obviously smaller than that of fundamental wave. The phase distribution of both fundamental and harmonic wave is measured using Hartmann-Shack wave front sensor in the experiment with 1064nm and 790nm lasers, respectively. Results are given.

首次从三维三波相互作用方程组推导得到了位相畸变光束倍频的小信号解；通过建立国防科学技术人学研究生院学位论文三维数值模型，编写相应仿真程序，首次得到了位相畸变光束倍频过程的大量计算结果，深入细致地研究了位相畸变光束经非线性光学频率变换后谐波的转换效率、光强分布、位相分布以及影响它们的各种因素；得出谐波的远场发散角和光斑二阶矩的变化规律会因为基波像差的不同而不同，但谐波的远场发散角明显地比相应基波的小的结论；得到了在走离效应和衍射效应等影响许多因素可以忽略的情况下，位相畸变传递到二次谐波的估算式；举例分析了KDP三倍频方案中，基波位相畸变对二次谐波和三次谐波的影响；实验工作中，用哈特曼一夏克传感器分别对IO64nm倍频过程和790飞秒超短脉冲倍频过程中的基波和谐波的位相分布进行了测量，给出了相应结果。

In chapter one, it compared letters with pictures and showed the importance of observation. In chapter two, it introduced the structure of human eyes and the course of vision. Chapter three introduced the basic key element of vision and the main theories of studying in vision aesthesia. In chapter four, it analyzed the principle of understanding the meaning of a figure according to the theory before, and analyzed the law of aesthetic. Then it explained how people feel the three-dimensional form and the movement, which have offered the theoretical foundation for creating more vivid image. It expounded the purpose and meaning of judging a visual figure in the fifth chapter, and introduced three general standards. It showed a method of judging the figure from different points of view in an example. Summarize to the full text finally, it point out the correct observation of vision image is one of the main ways for people's study, proposed the weak point of this text.

本文在第一章对文字与形象两类视觉信息进行了比较，提出了掌握形象观察方法的重要性；接着在第二章简单介绍了人眼的构造和视觉成像的过程；第三章分别介绍了视觉感知的基本要素和目前研究视觉的主要理论；在第四章，根据感知理论重点分析了人们识别、理解图形意义的原则，并由此归纳总结了形式美感产生的规律，提出了创造生动的视觉形象和构筑立体形象的规则和方法；第五章则阐述了对视觉形象进行评价的目的和意义，介绍了评价的三大普遍标准，针对人工形象提出了一套评价系统，并通过一个实例来说明评价系统的使用过程；最后对全文做出总结，指出正确的认识视觉形象是人们学习的主要途径之一，并提出了本文的不足之处。

The centennial xingtan square, the top three branches ofspicy camphor, KuXiao three, called "three wick sweet", Right ","top camphors citron, shaped like a fifth citron.

杏坛广场左侧有百年香樟，顶分三枝，酷肖三香，名为&三炷香&；右侧&佛手樟&，顶分五枝，形如佛手。

Three light cruisers three destroyers and three smaller vessels are lost along with 188 aircraft.

三轻巡洋舰，3艘驱逐舰和3个较小的船只，失去了与188架飞机。

These three heavy identities are three kinds of angle of views that she observes the world, and in her works, also usually body these three kinds of fusions of angle of views.

这三重身份是她观察世界的三种视角，在她的作品中，也往往体现了这三种视角的融合。

The three "goose" word, can understand that a child hears geese for three, can also understand for children playing in the water, the goose is very happy, happy and even call three goose, goose, goose.

这三个&鹅&字，可以理解为孩子听到鹅叫了三声，也可以理解为孩子看到鹅在水中嬉戏，十分欣喜，高兴地连呼三声&鹅、鹅、鹅&。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。