信号相关的串扰优化详细布线

针对超深亚微米IC布线设计中的串扰问题,提出基于改进遗传算法的串扰优化的详细布线方法．该方法同时考虑了产生串扰的动态和静态的因素,能够更加准确地反映线间串扰的情况,为布线的调整提供更大的余地．实验证明,该方法不但比现有的方法能更好地减少线间串扰,而且改进的遗传算法能显著地减少繁衍代数和运算时间。     

燃料电池电站功率调节系统及其数字化控制技术

介绍了燃料电池电站核心技术之一的功率调节系统的组成、作用及其发展现状和趋向,分析了功率调节系统数字化控制的关键技术,并探讨了技术方案。     

Spectral analysis of bi-tone waveforms: study of the uncertainty contributions arising from the virtual time-domain approach

Multi-tone signals are discrete-spectrum signals with spectral components located at nonharmonically related frequencies. The authors proposed a method that combines the use of a virtual time-domain and a statistical technique that provides an estimator for the spectral analysis of multi-tone signals in short observation intervals. In this paper, the above estimator is treated as error source, whose effects are referred to as “intrinsic contributions” to uncertainty. A study on these contributions is developed in the case of bi-tone signals and application examples are provided. The experimental results confirm theory.     

随机多元码脉位调制和脉间二元序列相位调制的混合波形设计

本文提出了一种利用随机多元码脉位调制（ＰＰＭ）和脉间伪随机或随机二元序列相位调制（ＰＭ）相结合的混合波形设计方法．推导并分析了这种混合波形的平均模糊函数．结果表明这种混合波形不仅具有结构简单、易于处理等特点，而且具有良好的测距和测速性能，以及良好的ＥＣＣＭ性能．     

基于FB-ZVZCS-PWM变换器的10kW充电机设计

介绍了一种基于全桥移相ZVZCS电路的充电机.文章主要从它的电路选型,控制系统设计,主电路参数设计方面进行了研究.最后展示了10kW的工程化样机和实验结果.     

电子式互感器测量环节传输特性的研究

电子式互感器作为电力系统的一种新型二次设备,具有动态范围大、数据传输抗干扰能力强、测量精度高、线性性良好等特点,因而在现代电力系统及继电保护中发挥着重要的作用.在分析罗氏线圈电流互感器结构和测量原理的基础上,对其进行传感头和模拟信号处理系统的建模工作,推导了传递函数,研究了电网高次谐波及冲击电流两种电网畸变波形对电子式电流互感器传输特性的影响,并通过Simulink进行了定性、定量仿真分析,同时还分析了电子式互感器的结构参数对输入输出特性的影响.     

光伏并网发电系统中的最大功率点跟踪控制

为实现光伏并网系统的最大功率点跟踪控制,提出了一种适用于基于混合控制的级联逆变器的光伏并网发电系统的双级控制策略.通过电流瞬时值反馈滞环控制,将输入电压控制(功率控制环)和光伏系统入网电流控制(电能质量控制环)解耦,简化了控制器设计.首先对该双级控制策略进行了分析,然后对瞬时值反馈单元控制器参数进行了设计,最后进行了仿真和实验.仿真和实验结果验证了所提出的控制方法的有效性,表明该双级控制策略可在进行最大功率点跟踪的同时保证入网电流质量     

非正弦波电参数综合测量仪的研制

本文介绍了所研制的０．２级的电参数测量仪,频率范围３０－４０００Ｈｚ,能同时综合测量１０个电参数。     

交联聚乙烯绝缘中树状放电的试验研究

本文旨在阐述用快速宽频带测量系统及影视技术对交联聚乙烯绝缘材料中树状放电的试验方法。证明有丛状放电和枝状放电两种形式。给出两种放电形式的不同特征。通过测量放电脉冲参数的变化，研究树状放电的机理。从而提供探索固体有机绝缘材料老化过程检测的新途径。     

A phase-correlated duo-binary waveform generation technique for millimeter-wave radar pulses

We propose a technique for generating millimeter-wave radar waveforms using edge-triggered pulse generator circuits. By synchronizing the chip rate to the oscillation frequency of a binary control signal, a phase shift is introduced in the generated pulses. This way, the millimeter-wave signal can be phase-modulated without the need of additional circuit elements. We show that high-resolution radar waveforms with low range side lobes can be generated with this technique. Using brute-force optimization, we evaluate all possible sequences up to a sequence length of 25 chips and identify optimal waveforms for each length. Optimal sequences with the energy centered at zero delay and side lobes not exceeding unity are presented. The optimized waveforms are measured and verified using an in-house resonant tunneling diode (RTD) metal-oxide-semiconductor field-effect transistor (MOSFET) pulse generator. The matched filter response of the optimal waveforms is reproduced closely in the measurements. The results enable increased sensitivity in radar systems using coherent millimeter-wave pulse generators for low power applications, as for instance, radar gesture recognition in handheld devices. Using pulsed millimeter-wave radar systems with low duty cycles, continuously running oscillators can be avoided and systems with ultra-low power consumption are possible.