校正

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。

This article discusses a single power factor correction flyback switching power supply, greatly reducing the size and weight of power supply to improve the stability of the power and efficiency.

本文讨论了功率因素校正单片反激式开关电源，大大减少电源的体积和重量，提高了电源的稳定性和效率。

Since it is unable to provide the correct focal distance data to the camera, it inevitably brings the calculation adjustment error which can cause the vibration due to the system error.

因为无法向相机提供正确的焦距数据，必然带来AS功能引入的计算校正误差，会导致系统错误造成的抖动。

On Image-Collecting, trapezoidal distortion is one of the most common distortion. We present a rectification method for it. In the case of knowing the focal distance and the size of CCD, the only parameter needed to know to restore the image is the angle of the camera axis with the ground.

摘要图像采集中的梯形失真是工程中最常见的失真之一，对此本文提出一种校正方法，在已知摄像机的镜头焦距和CCD大小的情况下，仅需要知道摄像机中轴线与地面的倾角一个参数，不需要控制点，就可以恢复原始图像。

Ohio State University, according to visual determination of the clinical professor Gregory Goode introduction, if your prescription is very simple, is not required at the same time to correct hyperopia and myopia dual optical lens, or does not require correction with a close-up, respectively, visual, medium-range vision and distance vision three focal length lens, you can with a pair of cheap glasses.

俄亥俄州立大学，根据临床教授格雷戈里古德介绍视觉的决心，如果你的处方很简单，不需要在同一时间，以纠正近视和远视的双重光学镜头，或者不需要的特写镜头校正，分别，视觉，中程的远见和远视力3焦距镜头，你可以用廉价眼镜。

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。

When a bird is sitting on your forearm and bites your hand or arm, correction is easy.

当一只鸟正坐在您的前臂及咬你的手或手臂，校正很容易。

Based on the current signal from the proceeding stage, the first orderΣ-Δmodulator designed could be simplified in the precondition of performance satisfaction, and it is good in accomplishing signal conversion and could be incorporated with the forestage bandgap circuit.

选择折线插值法进行非线性校正，通过硬件描述语言Verilog对体温计的占空比检测电路进行了设计，采用Matlab软件进行拟合仿真，获得了分段线性化输出方程，最后将信号转换为BCD码，在七段数码显示屏上输出。

A new method of holospectrum based on correction of phase difference was put forward in view of the lower precision of traditional holospectrum under noisy interference.

针对传统全息谱在噪声干扰下精度降低的问题，提出了一种新的基于相位差校正法的全息谱分析方法。

In equipments aspect, according to the 4 S standard of the local car profession, we have set up the sale exhibition hall and maintenance workshop, and we also equip with a batch of high technological maintenance and check-out facilities, such as Zhongda roasting painting building that is the domestic first-class, Germany BEISSBARTH four-wheeler fixing position apparatus, Zhongda body adjusting apparatus, VAG1552, Car Doctors malfunction reading apparatus and Italian SICAM tire disassembling and assembling balance machine and so on. Moreover we have taken the lead to provide the concentration air-supply system in the maintenance workshop in the North Shaanxi province.

在设备方面，公司严格按照国内汽车行业4S标准修建了销售展厅和维修厂房，配备有国内一流的中大牌烤漆房、德国百世霸四轮定位仪、中大牌车身校正仪、VIG1552及车博士故障阅读仪、意大利诗琴牌轮胎拆装平衡机等一批高科技含量的维修检测设备，并率先在陕北地区使用维修车间集中供气系统。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。