干扰抑制

The measures which retrain the interference were also discussed in this part.

分析了这种干扰对测量系统产生影响的机理，探讨了抑制这种干扰的措施。

The spatial nulling is implicitly achieved by estimating a sample covariance matrix and feeding its inverse into the extended Kalman filter. Computer simulations demonstrate robust performance of the algorithm in severe jamming.

针对多元天线接收机，提出了空时自适应信号处理算法，建立基于EKF自适应滤波技术的抗干扰模型，分析表明：在J／S即干扰／信号为60dB时，能较好的抑制窄带和宽带干扰作用。

Results of computer simulations prove that the MUD has higher SINR value, effective MAI cancellation, better Near -Far resistance capability than Decorrelating MUD. So it"s feasible and reasonable. Simulation results also show that the LMS algorithm can exactly converge to stationary value, works well on BER properties and adaptively detects the users" signals.

实验仿真表明稳态时这种结构的检测器可获得高于解相关检测器的信号干扰比，能够有效地抑制多址干扰，具有良好的抗远近效应能力；采用LMS自适应算法时能够准确收敛到稳态解上，较好的实现自适应检测。

In this thesis will discuss the suppress result of the adaptive robust controller at the effect of cogging foce.

在本文中将讨论其在外部干扰讯号钝齿效应干扰下，适应性控制理论的抑制效果。

Due to the fact that the intercarrier spacing in OFDM is relatively small, OFDM transceivers are somewhat more sensitive to phase noise compared to single carrier transceivers. Thus this problem must be carefully considered in designing an OFDMbased system since an accurate prediction of the tolerable phase noise can allow designer to relax system specifications. According to spectrum theorem, two components of phase noise were analyzed: common phase error and intercarrier interference. On the basis of the analysis, the performance of OFDM was given for the case where phase noise has been added to the signal, and an optimal design criterion for OFDM parameters was proposed that allows to improve the phase noise error correcting capabilities in OFDM receiver.

由于采用子载波间相互正交的结构，OFDM系统对于由本地振荡器不稳定性所导致的相位噪声影响非常敏感，针对公共相位误差CPE和载波间干扰ICI两种影响表现形式不同的干扰项，从功率谱密度函数这一独特角度分析了相位噪声对OFDM系统性能的影响，提出了旨在提高接收机抵抗相位噪声能力的OFDM系统关键参数优化与设计准则，可在对所设计OFDM系统性能加以提高的同时，有效降低对接收机前端模拟振荡器件和相位噪声抑制单元的性能指标要求，从而降低接收机硬件实现成本。

In this paper, a novel method for suppressing stationary noises is presented based on the nonstationary of PD.

摘 要：根据局部放电信号的非平稳统计特性，提出了一种用于抑制窄带干扰和测试设备产生的随机性干扰的新方法。

After the cell growth curves was recorded, RPE cells of the 3-5th passages were utilized. 2、Three different siRNA (siRNAl,siRNA2,siRNA3) targeting against human cx43 gene and one negative control siRNA were designed and transfected into cultured human RPE cells via liposome reagent. The most effective siRNA can be determined by semi-quantitative reverse transcription PCRRT-PCR. 3、To the most effective siRNA, after transfected into human RPEs with different concentration, the cellular proliferate activities were messured by MTT colorimetry ; the percentages of RPE in different cell circle phase was assayed by FCM; the changes of phenotypical properities were observed with SCM; the protein expression of cx43 was studied through immunocytochemistry stain and Weston blot; the communication intercellular was calculated with FRAP; and the ability of recovery was assessed by using an in vitro wound healing model.4、The total proteins of siRNA1 and RPE were seperated by two-dimensional gel electrophoresis and visualized by silver staining. Proteins with significant expression alterations were selected and their peptide mass fingerprints (PMFs were obtained by matrix-assisted laser desorption/ionization time of flying mass spectrometry (MALDI-TOF-MS).The PMFs were used to search NCBInr database by Auto MS-Fit software.

实验方法：1、培养原代的人RPE细胞，经过细胞角蛋白、S-100和神经胶质原纤维酸性蛋白免疫细胞化学鉴定后，通过AO/PI染色技术确定培养细胞的存活率，描记其生长曲线，第3-5代用于以下细胞实验2、生物合成针对人cx43基因的三条小干扰RNA和一条阴性RNA通过脂质体转染RPE细胞后，通过RT-PCR的方法确定抑制效率最高的干扰片断3、将该片段以不同浓度通过阳离子脂质体转染培养的人RPE细胞后，采用MTT法观察其对细胞的增殖力的作用；通过流式细胞仪观察其对细胞周期的影响；通过扫描电镜观察其对细胞形态的影响；通过免疫细胞化学和Weston blot观察其对cx43蛋白表达的作用；采用激光共聚焦和荧光淬灭恢复技术观察荧光恢复速率平均百分率，评价其对细胞间通讯功能的影响；通过制作RPE细胞损伤模型，观察其对损伤修复能力的作用4、分离纯化转染siRNA的RPE组和正常对照组RPE细胞的全部蛋白质，应用等电聚焦电泳和SDS-PAGE双向电泳技术，银染显示分离出的蛋白质斑点，经凝胶图像分析软件对两个样本进行胶图分析，寻找差异蛋白点。

The procreant causation? mostly impress fashion and harm of EMI are introduced in this paper .

介绍了电磁干扰产生的原因、主要传递方式和危害性，着重叙述了对硬质合金生产系统电磁干扰的一些有效的抑制措施和方法。

In this thesis, the system model of DS-SS system and the adaptive filter structure are first introduced . Then, the interference suppression(interferences including strong tone and NBI)using the LMS algorithm with adjudging and feedback is analyzed in detail.

在叙述了DS-SS特性及自适应滤波器结构后，我们采用带判决反馈的LMS自适应算法抑制DS-SS信号中的强单音干扰、窄带干扰，分析了算法的各项性能，并利用计算机进行仿真，讨论了所取参数对算法的影响。

First it proposes a method based on chirp rate jittering, through the process of jittering and thresholding, coherent repeat jammings including terrain scattered jamming are greatly suppressed, which displays the potential use for real environment.

针对空域抗干扰技术难于抑制场景散射干扰的缺点，提出了一种基于调频率极性捷变和限幅过程相结合的抗干扰方法，通过脉间捷变调频率极性，并对干扰的匹配结果进行限幅，大大提高了抗干扰效果。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。