CDMA

为了更好地进行谐波和无功功率的补偿与控制，叶FBD(Fryze一Buchholz一DPenbrock)法的定 义进行了完善，并给出了补偿电流检测的直接法和间接法，在三相电力系统中对FBD间接法进行 了推广研究，利用参考电压进行投影变换，不仅可以检测出功率电流和零功率电流，还可以检测出 基波有功电流、基波无功电流、谐波电流以及任意次谐波电流等，大大拓展了FBD法的应用范围和领域。MATI一AB仿真和实验结果表明了所定义和推广的电流检测方法的正确性和有效性。 (In order to improve the performance of active power filter(APF) harmonic current detection method, a harmonic current detection based on FBD(Fryze-Buchholz-Dpenbrock) algorithm was proposed. Reference voltage was generated by phase locked loop(PLL), and load current was projected to reference voltage, and then the active power fundamental current, reactive power fundamental current, harmonic current, fundamental negative sequence current, any harmonic current and so on can be detected accurately by using low-pass filter(LPF), and in the case of distorted voltage, the method was also applicable. The simulation results verify the fast dynamic speed, high detection accuracy, simple implement and good project value of the proposed algorithm. MATLAB simulation results confirm the feasibility and validity of the method.)

关于利用gnss反射测量技术对海洋进行遥感探测的博士论文，非常值得学习(On the use of gnss reflection measurement of marine remote sensing detection of doctoral thesis, is worth learning)

该文档讲述了一种交错并联型PFC电路的设计，设计大功率PFC电路时可以参考一下(This document describes the design of a interleaved parallel PFC circuit, and can be referenced when designing a high-power PFC circuit.)

说明：  介绍了北斗双星定位系统的特点、 功能、 系统组成和工作原理， 说明了北斗有源定位方式在应用方面的局限性.对搞BD无源定位而言，是篇很有用的论文，在此分享。(Introduced Beidou Positioning System features, functions, composition and working principle of the system, indicating the way Beidou active positioning application limitations. Right out BD passive positioning, the paper is very useful articles in this share .)

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

以双向DC-DC变换器为例，通过双向控制模型的分析，采用PID 补偿环节的单电压闭环实现了BDC系统闭环稳定。(Bi-directional DC-DC converter, for example, through the analysis of the two-way control model, the single-voltage closed-loop PID compensation link to achieve a the BDC system closed-loop stable.)

资料很重要，描述高频线路中的应用。主要是放大电路，实验步骤等等。(The item is very important, describe the application of high-frequency lines. The main amplifying circuit, the experimental procedure.)

说明：  永磁同步电机双闭环控制MATLAB仿真程序(MATLAB permanent magnet synchronous motor double closed-loop control)

哈尔滨工程大学word格式论文，基于差分演进算法的TDOA定位技术。提出了三种新的定位算法：基于TDOA的Chan-GA算法、Chan-DE算法和Chan-IDE算法。并在相同的仿真环境下进行比较，仿真结果表明，在保证种群数量的情况下，所提的算法性能稳定，能找到逼近全局最优点的解，相对于Chan算法精度更高,相对于以前的算法在保证收敛性能的前提下有更快的收敛速度。(Harbin Engineering University, word format papers, based on differential evolution algorithm TDOA positioning technology. Proposed three new localization algorithm: Based on TDOA Chan-GA algorithm, Chan-DE algorithm and Chan-IDE algorithms. And in the same simulation environment to compare simulation results show that, in the case of populations to ensure that the proposed algorithm performance and stability, can be found close to the global optimal solution, Chan algorithm with respect to higher accuracy compared to the previous algorithm convergence performance guarantee under the premise of a faster convergence.)

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