无失真

Topics include: mathematical definition and properties of information; source coding theorem, lossless compression of data, optimal lossless coding; noisy communication channels, channel coding theorem, the source-channel separation theorem, multiple access channels, broadcast channels, Gaussian noise, and time-varying channels.

课程主题包括：针对「资讯」的明确数学定义及性质描述；信源编码理论、无失真资料压缩技术、最佳化无错误编码；杂讯干扰的通讯频道解析、频道编码理论、资讯来源-通道编码分离理论、多重存取频道解析，广播型态频道解析、高斯杂讯及多变量时间频道解析。

Experimental results show that the algorithm can segmentalize ROI effectively, CR is higher than 30, PSNR of the whole image is higher than 42 dB, and the object keeps original fidelity. Inter-frame CR is about 7, background has cumulative error and PSNR is higher than 40 dB.

实验结果表明，该算法在帧内能有效地划分感兴趣区域，压缩率在30以上，峰值信噪比在42dB以上，目标无失真；帧间压缩的压缩率在7左右，背景区域有误差累积，但整体图像的峰值信噪比都在40dB以上，目标无失真。

If the diamond—shaped filter banks are error—free, the fan filter bank is also error—free.

若采用无失真的菱形数字滤波器组，扇形数字滤波器组的重建误差为零。

A Doppler processing approach based on minimum variance distortionless response and resampling technique is proposed for multifrequency radar signals.

提出了一种基于最小方差无失真响应(minimum variance distortionless response， MVDR)算法和频率重采样技术的适用于多频雷达信号的多普勒处理方法。

The distortionless lossy CPS has a real characteristic impedance, and thus, perfect port matching of the coupler can be achieved.

无失真具损耗的共平面带状传输线具有实数特性阻抗，使得耦合器在中心频率可达成匹配。

Concerning the distortionless linear transmission system,a new method-SSPD was put forward,which implements the precise time delay through a linear shift invariable system with unit impulse response symmetry.

从无失真线性传输系统的角度，提出了基于具有对称特性的单位冲击响应的线性移不变系统实现精确时延的方法——SSPD。

A mathematical upper bound of the modulation index for nonlinear distortionless transmission of wireless signal over fiber was derived according to the speciality of analog optical link modulation process.

3通过具体分析马赫—曾德调制器非线性失真的原因和所导致的影响，根据模拟信号光纤传输链路光载波信号的调制特点，推导出无线光传输链路进行信号无失真传输的光调制指数上限。

The proposed beamformer represents a modification of the popular minimum variance distortionless response beamformer. It minimizes the array output power while maintaining the distortionless response in the direction of the desired signal and a sidelobe level that is strictly guaranteed to be lower than some given threshold value.

它是通常的最小方差无畸变波束形成算法的改进形式，使阵列输出信号功率最小的同时，保持目标信号方向的无失真响应，并且严格保证旁瓣低于某一给定值，抑制干扰。

The algorithm of SAR image's lossless compression and low loss compression is discussed.

对SAR图像的统计特性进行了研究，据此对SAR图像的无失真压缩、低失真压缩进行了理论研究。

This ideal input current will make sure nearly with between phase and undistorted wave of input voltage.

为了提高用电设备的效率以及减少所造成的谐波污染，在本文中提出了一个高效能的主动功率因数校正电路，本架构是以电压电流以及负载的关系，将输入电压以及输出负载经由运算后得到理想的输入电流，使得输入电流几乎与输入电压同相位且无失真，藉此消除输入电压与输入电流之相位差与电流失真，以减少电力的虚功消耗以及谐波成份。

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。