Two-step measurement update for extended Kalman filtering

1.INTRODUCTION TheextendedKalmanfilter(EKF)isthemost widelyusednonlinearfilterbecauseofitssimplicity despiteitsinconsistenceinsomeapplications.Thein consistenceoftheEKFmainlyarisesfromtheuseof linearization.Sincethereferencepointsforthelin earizationarearoundthepriorestimatesofthestate (filteredestimateforlinearizationofstatetransition equationandpredictiveestimateforlinearizationof measurementequation,respectively),agoodprior estimateisveryimportantfortheEKF.Inmanycas es,themeasur…     

高等教育产业应"化"在哪里

关于高等教育产业化问题的讨论,目前主要有三种不同的观点,即高等 业化论,高等教育非产业化论和高等教育不能完全产业化论,笔者认为第三种观点是比较科学和客观的。本文主要从高等教育是一种特殊的产业,但不能完全产业化和高等教育产业化“化在”哪里及高等教育产业应“化”出什么三个方面谈点自己的理论认识和实践思考。     

连续条件下双重倒向随机微分方程的比较定理

利用Tanaka-Meyer公式研究了双重倒向随机微分方程在连续条件下的比较定理.     

现场工作安全管理之继电保护作业浅谈

继电保护是保证电网安全稳定运行的最后一道保护屏障.通过对做好作业前的危险因素分析与控制,作业过程中实行标准化作业管理、规范作业行为,坚持以人为本,实行人性化安全管理等方面阐述了继电保护相关人员应如何做好现场安全措施,使继电保护工作安全有序地进行,以保障现场工作的安全,并提高工作的质量.     

现场工作安全管理之继电保护作业浅谈

继电保护是保证电网安全稳定运行的最后一道保护屏障。通过对做好作业前的危险因素分析与控制,作业过程中实行标准化作业管理、规范作业行为,坚持以人为本,实行人性化安全管理等方面阐述了继电保护相关人员应如何做好现场安全措施,使继电保护工作安全有序地进行,以保障现场工作的安全,并提高工作的质量。     

基于关联规则的课程拓扑排序研究

针对现有的计算机辅助教学评价系统不能充分有效利用数据为教学服务的缺点,提出了应用于课程拓扑排序的关联规则挖掘的算法,来发现专业开设课程之间的相关度,以便科学地设置课程.     

基于零动态原理的TCSC非线性控制器

基于微分几何控制理论,利用零动态响应方法设计TCSC(thyristor-controlled series compensation)控制器,用于抑制线路的功率振荡．设计的控制器只需要依赖于TCSC自身的动态方程,包括装置的固定和可调电抗参数,装置的动态时间常数,并只须反馈本地的测量信息,实现简单,鲁棒性强,能够适应系统的运行方式的变化．仿真结果表明,该非线性控制器具有较好的抑制线路功率振荡的作用,能够提高系统运行的稳定性．     

Long-distance quantum communication with atomic ensembles and linear optics.

Quantum communication holds promise for absolutely secure transmission of secret messages and the faithful transfer of unknown quantum states. Photonic channels appear to be very attractive for the physical implementation of quantum communication. However, owing to losses and decoherence in the channel, the communication fidelity decreases exponentially with the channel length. Here we describe a scheme that allows the implementation of robust quantum communication over long lossy channels. The scheme involves laser manipulation of atomic ensembles, beam splitters, and single-photon detectors with moderate efficiencies, and is therefore compatible with current experimental technology. We show that the communication efficiency scales polynomially with the channel length, and hence the scheme should be operable over very long distances.     

Advances in interspecific pregnancy

Interspecific pregnancy in which the conceptus and female carrying the pregnancy are of different species is a key step to interspecific cloning. Cloning endangered animals by interspecific pregnancy is such a highlight catching people’s eyes nowadays. In this article, the history of interspecific pregnancy, the methods for establishment of interspecific pregnancy, the corresponding theories, barriers and applied prospects are reviewed. These authors contributed equally to this work.