环境噪声

A TV target tracing system has following features: real-time, image indistinctness on the ground of dynamic tracing and external environmental distortion, high n...

电视目标跟踪系统实时性强，由于是动态跟踪和外界环境干扰，所以导致图像不清晰、背景噪声较强。

At last, the Double Message Signal is proposed and the non-interfere condition is presented that the steering vectors are orthogonal in the weighted inner product space, with the inverse matrix of background covariance as the weighting matrix. The optimal polarization states are designed, according to the EM background.

最后，提出了一种双信息信号传输的方案并导出了无互扰传输的充要条件：两期望信号的信号矢量在以干扰噪声协方差矩阵的逆矩阵为加权矩阵的加权内积空间中正交，在给定的电磁环境下设计了双信息信号的极化状态。

Methods of multipath jammer tracking with a passive radar seeker are presented in this paper.

讨论在多径环境下，被动雷达导引头对噪声调频干扰源的角度跟踪方法。

Methods of wide band multipath jammer tracking with passive radar seeker are presented.

讨论了在多径环境下被动雷达导引头对宽带噪声调频干扰源的角度跟踪方法。

In order to restrain the high noise in low voltage power line, a spread spectrum scheme for PLC is also designed in this system.

为抑制我国低压电力线环境上的严重噪声，本文也为该系统设计了适合于电力线通信的扩频方案。

The simulation results show that the denoising effects of the three methods are all superior to that o f Fourier transform, and the influence of colored noise can be eliminated effectively by bispectrum methods. That is very i mportant for reconstructing LoranˉC signal under the condition of small signalˉtoˉnoise ratio, and also lays the fou ndation for digital LoranˉC signal processing.

仿真分析结果表明，三种方法的去噪效果都优于传统的傅氏变换法，且双谱估计能够有效地去除色噪声的影响，对于小信噪比条件下的罗兰C信号的提取和恢复具有重要意义，也为复杂环境下对罗兰C信号的数字处理奠定了良好的基础。

Adopt effective measures to prevent and control the pollution and harms caused to the environment by waste gas, waste water, waste residues, dust, malodorous gases, radioactive substances, noise, vibration and electromagnetic radiation generated in the course of production, construction or other activities.

采取有效措施，防治在生产建设或者其他活动中产生的废气、废水、废渣、粉尘、恶臭气体、放射性物质以及噪声、振动、电磁波辐射等对环境的污染和危害。

Considering the complex environment of PLCC,this paper first establishes the channel model of low-voltage power line on the basis of the research of its impedance,attenuation,and noise characteristics.

针对低压电力线通信环境复杂的特点，本文在综述信道模型的基础上，根据对其阻抗特性、衰减特性及噪声特性的分析，提出并实现了利用实际网络结构、负载装置和电力线模拟电路，组成信道模拟系统的方法。

Noise ; Transportation ; Environmental monition ; Fatigue ; Middle school student

噪声；交通运输工具；环境监测；学习；疲劳；中学生

This thesis is focus on the detection and processing of fluorescence signal based on TRFIA, the signal includes single signal and multidrop signal which is biological chip.

首先分析了荧光信号产生的机理，在此基础上考虑到荧光信号十分微弱的特点和在强噪声背景环境下检测，设计了基于数字BOXCAR的信号检测系统。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。