ESO抑制扰动特性的研究

本文给出了自抗扰控制技术用于滤波的研究结果,提供了一些仿真实例。结果表明,这种新型的控制技术对高频噪声具有较好的滤波特性。     

基于FPGA的LED点阵系统控制器的设计与分析

设计了一种基于FPGA器件以FSM方式实现的LED点阵系统控制器模型.该控制器的主要控制逻辑都集中在一个FPCA器件中,控制器的I/O端口可以直接与驱动电路的输入接口相连.控制器与PC监控中心可以用RS-485或以太网口总线形式进行数据传输,通过仿真及下载验证该控制器具有硬件简洁、扩展方便、可靠性高等优点.     

球谐环形振荡势薛定谔方程的精确解

本文在新的环状非球谐振子势的基础上研究了一种新的非中心势,称之为球谐环状震荡势V(r,θ)=1/2(Mr2)ω2+(h2)/(2Mr2)((η+(A(cos2)θ)+(B(cos4) θ)/(sin2 θ)(cos2θ)).用Nikiforov-Uvaroy方法进行了研究,求出了球谐环形振荡势条件下的薛定谔方程的精确解...     

Consecutive tracking for ballistic missile based on bearings-only during boost phase

This paper proposes a modified centralized shifted Rayleigh filter(MCSRF) algorithm for tracking boost phase of ballistic missile(BM) trajectory with a highly nonlinear dynamical model based on bearings-only.This paper contributes three folds.Firstly,the mathematical model of an MCSRF for multiple passive sensors is derived.Then,minimum entropy based onedimensional optimization search to adaptively adjust the probability of the different filters for real time state estimation is deployed.Finally,the unscented transform(UT) is introduced to resolve the asymmetric state estimation problem.Simulation results show that the proposed algorithm can consecutively track the BM precisely during the boost phase.In comparison with the unscented Kalman filter(UKF) algorithm,the proposed algorithm effectively reduces the tracking position and velocity root mean square(RMS) errors,which will make more sense for early precision interception.     

Comparison of Achievable Rates of OFDM and Single Carrier Communication Systems

This paper presents a theoretical comparison of a single carrier system and a multi-carrier system through an analysis of the achievable rate under frequency selective fading with channel state information at the receiver. A scheme was designed to compare the achievable rates of a single carrier system and an Or-thogonal Frequency Division Multiplexing (OFDM) system. A thorough theoretical analysis of the two-path channel was conducted, and simulations were also used to analyze practical stochastic channels. Analysis and simulation results show that the achievable rates of the two approaches are comparable when the channel is flat fading. However, when the channel is frequency selective fading, the single carrier system outperforms the OFDM system. The achievable rate of the OFDM system is about 10% lower than that of the single carrier system at higher SNRs.     

自旋相干态法解Dicke模型的基态解析解

文章采用了自旋相干态的三种表达方式,利用了变分原理,求解了Dicke模型的相变点和基态能量解析表达式,这三种方法所得的结论与Holstein-Primakoff(HP)变换方法所得结论完全一致,而这三种方法有一定的普适性和优越性.     

意识形态批评分析——以《阿甘正传》为例

意识形态批评产生于20世纪60年代,是最重要也是最具活力的电影批评理论,对于揭示由大众文化所负载的新主流意识形态的建构过程,保持着现实的活力。影视文学的意识形态批评受益于路易·皮埃尔·阿尔都塞的意识形态国家机器理论。《阿甘正传》这部既在美国国内又在世界上引起轰动的影片正好是进行意识形态批评的恰当文本。从意识形态批评理论的角度对《阿甘正传》进行分析,可知该影片反映了两种意识形态,一是种族问题及和解;二是性别、文化间的冲突与和解。     

理解国家自主性:范式确立、基本内涵与理论评析

从新马克思主义的相对自主性到回归国家学派的潜在自主性、镶嵌自主性构成了国家自主性理论的研究谱系和学术图景。国家利益、官僚组织和国家能力是理解国家自主性内涵的三个核心概念。回归国家学派确立的国家中心主义研究范式是对社会中心论的一种纠正和补充,但其概念界定的模糊性与研究方法的局限性成为国家自主性理论的缺陷和不足之处。     

我国国有商业银行表外业务存在问题及解决对策

该文通过阐述我国国有商业银行表外业务发展中的情况和特点,根据其出现的品种单一、业务量少、区域发展不均衡和管理不规范等问题,相应地提出了加快金融创新、提高对其业务重要性的认识和业务营销水平、加强银行间区域合作和完善相关规章制度建设等合理的对策,以期能对我国金融业的发展提供些许有益的参考。