new

Exact Thresholds and Optimal Codes for the Binary-Symmetric Channel and Gallager’s Decoding Algorithm A

在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案(The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program)

当前，矢量控制是一种优越的交流电机控制方式，它模拟直流电机的控制方式使得交流电机也能取得与直流电机相媲美的控制 效果。依据矢量控制的基本原理和方法，用 456752 8 9:4 7:<= 模块构建了一个基于转子磁场定向的旋转坐标系下的交流异步 电机矢量控制系统仿真模型，对其速度控制器提出并设计一种模糊滑模变结构控制算法。该控制算法具备模糊逻辑控制和滑模 变结构控制两者优点，并且较好地解决了滑动模态的抖动问题。仿真结果表明了该设计的可行性以及具有良好的动静态性能、 较强的鲁棒性(6.C+D& EFB@.A B.*@A.G ! H’ , )?+ ?1IFA).A B.*@A.G J.CF .K )*C1B@).* J.@.AL :@ B+* .>@+)* @(F ?+JF B.*@A.G FKKFB@ .K M’ J.@.A >D J.CFG)*/ @(F B.*@A.G J.CF .K M’ J.@.AL 5BB.AC)*/ @. EFB@.A B.*@A.G N ? IA)*B)IGF+*C JF@(.C& 456752 8 9:4 7:<= J.C1GF O+? 1?FC @. >1)GC+ ?)J1P G+@).* J.CFG .K 5’ J.@.A EFB@.A B.*@A.G ?D?@FJ >+?FC .* @(F A.@.A KG1Q .A)F*@FC B..AC)*+@F )* @()? I+IFAL R1SSD ?G)C)*/ E+A)+>GF ?@A1B@1AF B.*@A.G O+? IA.I.?FC+*C FJIG.DFC )* ?IFFC B.*@A.GGFAL 6(F B.*@A.GGFA I.??F??FC @(F JFA)@? .K K1SSD G./)B B.*@A.G+*C ?G)C)*/ J.CF E+A)+>GF ?@A1B@1AF B.*@A.G ， +*C )@ B+* ?.GEF @(F IA.>GFJ .K @(F B(+@@FA)*/ .K ?G)C)*/ J.CFL 6(F AF?1G@? .K ?)J1G+@).* )*C)B+@F @(+@ @(F B.*@A.GGFA O+? O.AT+>GF O)@( /..C A.>1?@*F??+*C /..C CD*+J)B+*C ?@+@)B IFAK.AJ+*BF F?IFB)+GGD )* @(F K)FGC .K F*/)*FFA)*/)

说明：  Owing to the broad application value of audio watermarking in remote transmission and mobile extraction, it is very important to study watermarking approaches against A/D and D/A conversion. Based on wavelet decomposition and cepstrum technology, an audio watermarking algorithm is proposed where the low-frequency wavelet coefficients are chosen for cepstrum transforming. Then, the obtained cepstrum data shows stable for watermark hiding by the methods of edging data cutting and statistical mean modification. The synchronization is not required in the algorithm. Experimental results show that the proposed algorithm can resist on the attack of A/D and D/A successfully with features of large capacity and zero bit error. It will be helpful for the mobile audio in secure broadcast and management in the

声音对讲和压缩IC，WT2000+FM1188设计方案参考(Voice intercom and compression IC, WT2000+FM1188 design reference)

说明：  介绍了一种路径跟踪的智能预瞄控制方法，并介绍了智能预瞄控制器的原理、结构及其设计过程。 (This paper presents a path tracking control method for intelligent preview, and introduced the intelligent preview controller principles, structure and design process.)

一套能够适合不同类型商品、超强灵活的多功能在线商店系统，为您提供了一个完整的在线开店解决方案(Can be set for different types of goods, super flexible multi-purpose online shop system provides you with a complete online shop solution)

网络录音盒系列资料之一：网络录音盒实现文档。本文档系本人毕业设计的论文部分，详细的介绍了一种嵌入式网络录音盒的设计与实现。所谓网络录音盒是指一种可以通过网络向远程的计算机提供录音盒所在位置的监听以及录音功能的网络设备。本人已经上传了录音盒相关的所有资料，为了方便用户选择自己所需的内容，本人将所有资料分为三部分上传：1、文档；2、源码；3、测试过程。(network data recording boxes series one : Network box on document recording. This document is designed my graduation thesis, a detailed introduction of a sound recording box Embedded Network Design and Implementation. The so-called network recording box refers to a network through a remote computer to the provision of recording the location of the box and recording wiretapping functional network equipment. I have uploaded the recording box all the related information, in order to facilitate the user to choose the content they need, I will be all the information is divided into three parts Upload : 1, the document; 2, the source; 3, the testing process.)

ELM算法参考论文，ELM算法参考论文，ELM算法参考论文，ELM算法参考论文(ELM algorithm reference papersELM algorithm reference papersELM algorithm reference papersELM algorithm reference papersELM algorithm reference papers)

一篇TURBO 均衡的博士论文，非常有价值(A the TURBO balanced the doctoral thesis, very valuable)