查询词典 visual angle

A experimental measuring system of double-illuminator method was used in order to study the history of collapse parameters include two dimensional Lagrange velocity and Taylor angle about two type of spherical liners. The final velocity,final Taylor angle and characteristic time of specified particles on inner wall of liners were measured .

文中应用二维拉氏速度光学测量技术，测得两种球缺形药型罩在炸药驱动下内壁给定位置的运动参数变化历程，包括速度和台劳角变化历程，并得出其极限速度、特征加速时间和极限台劳角。

The encounter angle was a key factor of effects on the movement of flat-bottomed yacht. To keep right course, it should be necessary to adjust the encounter angle timely.

帆船在波浪中行驶时，遭遇角是影响帆船运动状态的关键因素之一，为保持正确航向应适时修正遭遇角。

The flexure inherently induces a change in pitch angle in accordance with a change in flap angle.

柔性本质上诱导的改变，俯仰角，在按照改变在皮瓣的角度来看。

The flexure of claim 1 wherein a positive change in flap angle produces a negative change in pitch angle.

柔性索赔1其中了积极的变化，在皮瓣的角度产生负面的变化俯仰角。

In this article two functional modes of the Fly-back Converter (Continuous Conduct Mode and Discontinuous Conduct Mode) are particularly analyzed, which include their characteristics, applications, the critical pattern of two functional modes is argued, both the exact boundary from the angle of circuit parameters is crystallized, at the same time, basic principle of PFC under the DCM mode is introduced, which settle theoretical basis for the subsequent design; by establishing the mathematic model of the converter, a further investigation of the configuration is made, qualitatively and quantitatively, analyzed to settle exactly theoretical basis for the subsequent emulation and the experimental parameter; from the angle of steady-state analysis, the transfer function of the system is deduced to establish dynamic small-signal state equation, emulating the system with the help of matlab, then according to the simulation result and the theory of PFC revise the system, lastly, we adopt the project which add a zero-pole compensator to the voltage loop, by this way, a satisfied system performance is gained and the PFC scheme is ensured successfully; finally, based on the previously-done work, we combining with the situation of specific design requirement, acquired the numerical value of each unit devices in this converter

详细分析了反激式变换器的两种工作状态，连续模式(Continuous Conduct Mode ，简称CCM)和断续模式(Discontinuous Conduct Mode，简称DCM)以及各自的特点、应用场合，论证了两种工作状态的临界模式，从电路参数的角度明确了二者的界限，同时还介绍了DCM模式下PFC的基本原理，为后面的设计奠定理论基础；通过对整个变换器系统建立准确的数学模型，对此变换器的电路结构做了进一步的研究，定性、定量地分析了变换器各部分的工作状态，为仿真和实验参数的确定以及电路参数的优化提供理论依据；从稳态分析的角度，为系统建立了动态小信号状态方程并推导出系统的传递函数，利用matlab对系统进行仿真，进而根据仿真结果以及PFC的相关理论对系统进行校正，采用在电压环加入零点—极点补偿器的设计方案，得到了满意的系统特性并且保证了PFC的顺利实现；最后，在前面所做工作的基础上，结合设计要求计算出此变换器系统中每个元器件的数值，利用Pspice对其进行了仿真、优化，然后根据仿真结果搭建了硬件电路。

The merit of the invention are: 1 adopting free curved surface imaging method , three part reflection type Zernike polynomial free curved surface forms short focal distance bigger, relative apertures bigger fields of view angle imaging , rectifying optical aberration much better and its structure is simple; 2 adopting the reflection structure without optical lens, has removed the effect of various chromatic aberration , guarantee the imaging articulation; 3 adopt the design of short focal distance big fields of view angle, focal distance 8 - 15 mm, field of view angles 100 -135 degree, having 120 times multiplications under 250 mm imaging distance, having ultra-thin characteristic property; 4 adopting big relative apertures design ,the relative aperture is 2.0-2.4, having improved the illuminance of flat surface; 5 adopting image space telecentric imaging method , ensures that the image surface irradiance is homogeneous.

本发明的优点是：1采用自由曲面成像方法，三片反射式Zernike多项式自由曲面形成短焦距大相对孔径大视场角成像，更好地校正像差，结构简单；2采用无透镜形式的反射式结构，消除了各种色差影响，保证成像清晰度；3采用短焦距大视场角设计，焦距8～15mm，具有100～135度的视场角，在250mm成像距离下有120倍的放大倍数，具有超薄特性；4采用大相对孔径设计，相对孔径为2.0～2.4，提高像平面上的光照度；5采用像方远心成像方法，保证像面辐照度均匀。

"Fisheye:Of, relating to, or being a wide-angle photographic lens that covers an angle of about 180, producing a circular image with exaggerated foreshortening in the center and increasing distortion toward the periphery."

鱼眼镜头的：覆盖角度在180°左右、产生圆形图象且中央是夸张的使更向外围扭曲的透视图的广角摄影镜头的或与之有关的。

Relating to , or being a wide angle photographic lens that covers an angle of about180 , producing a circular image with exaggerated foreshortening in the center and increasing distortion toward the periphery .

鱼眼镜头的覆盖角度在180°左右，产生圆形图象且中央是夸张的使更向外围扭曲的透视图的广角摄影镜头的或与之有关的

Relating to , or being a wide angle photographic that covers an angle of about180 , producing a image with exaggerated foreshortening in the center and increasing distortion toward the periphery .

鱼眼的覆盖角度在180°左右，产生图象且中央是夸张的使更向外围扭曲的透视图的广角摄影的或与之有关的来源：词友

Through carrying out force bearing analysis on the spring ring and utilizing the correlated theory of mechanics of materials,the relationship between bending moment and bending angle was derived while the spring was subjected to the action of bending moment.The computation formula of bending angle of spring was obtained,and an optimization was carried out on the parameters.

同时，对密圈圆柱螺旋弹簧的弯曲刚度和横向刚度的计算也有一定的研究，以往的普遍研究方法是将整个弹簧等效为一等截面的弹性圆柱体，基于普通弹性理论的方法导出了弹簧的弯曲刚度和横向刚度的计算公式，具有较大的误差[1，2]。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。