一种高可靠数据传输接收机的研制

介绍了一种高可靠的数据传输接收机的设计。该数据传输接收机采用速度插值补偿方法,较好解决了火炮随动抖动的问题;采用电气隔离传输技术,实现了系统的稳定、可靠工作。     

信号源功率电平高准确度测量方法

对射频信号源的绝对电平和调谐射频电平的测量方法、测量仪器的配置选择、误差来源,以及测量不确定度等方面进行了综合分析和研究.     

系列仿真耳相关标准及应用

为了对受话器、耳机、听力计、电话机等与人耳听觉相关的电声器件和设备的声学指标进行客观测量和校准,国际电工委员会(IEC)制定了一系列耳模拟器(声耦合腔)的标准,耳模拟器(声耦合腔)和特定的测试传声器、前置放大器等组合成仿真耳(人工耳)。介绍这些仿真耳对应标准和相互之间的差异,以及它们的应用。     

基于灰色理论和效费比的装备保障方案优选

针对目前装备保障方案优选决策出的方案并不一定是最科学的情况,同时考虑到保障方案中存在小样本数据和数据不确定的因素,提出基于灰色理论和效费比的装备保障方案优选方法,方法着重强调了效费比在决策评判中作用,以免遗漏科学符合工程实践的保障方案.案例分析表明,方法值得在工程实践中借鉴.     

雷达中频限幅放大器的设计

根据具体要求从总体上概述了该雷达中频限幅放大器的制作思路，对采用的主要器件进行了介绍。针对电路增益大、容易受干扰、自激的特点进行了放大级数、级联方式选择及抗干扰电路的设计，给出了具体电路。测试及使用证明该电路符合设计要求且具有良好的稳定，有使用及推广价值。     

Energy-Based Collaborative Spectrum Sensing for Cognitive UWB Impulse Radio

This paper focuses on the issue of collaborative spectrum sensing in cognitive ultra wideband (CUWB) impulse radio. We employ energy-based signal detection method and apply the Neyman-Pearson (NP) deci...     

A cyclic redundancy check‐based non‐coherent receiver for automatic identification system signals

A non‐coherent receiver for automatic identification system (AIS) signals is proposed in this paper. The proposed receiver is based on the Viterbi algorithm with cyclic redundancy check (CRC) trellis. It takes bit stuffing into consideration and is designed to simultaneously demodulate decode and correct the received messages. The complexity of the proposed receiver has been reduced with state‐complexity reduction. Simulations prove that the proposed receiver outperforms those AIS receivers without CRC trellis error correction in terms of BER and packet error rate. Copyright © 2015 John Wiley & Sons, Ltd.     

带有改进的典型交易成本函数的MCvar模型及其例证分析

首先建立带有改进的典型交易成本函数的MCvar投资组合模型,同时给出了求解该模型的基于相关性粒子群算法的具体步骤.然后选取A股市场上的三只股票进行了一组数值实验.通过对数值计算的结果分析表明算法有效可行.最后对下一步有待解决的问题提出了几点思考.     

Life insurance policy termination and survivorship

There has been some work, e.g. Carriere (1998), Valdez (2000b), and Valdez (2001), leading to the development of statistical models in understanding the mortality pattern of terminated policies. However, there is a scant literature on the empirical evidence of the true nature of the relationship between survivorship and persistency in life insurance. When a life insurance contract terminates due to voluntary non-payment of premiums, there is a possible hidden cost resulting from mortality antiselection. This refers to the tendency of policyholders who are generally healthy to select against the insurance company by voluntarily terminating their policies. In this article, we explore the empirical results of the survival pattern of terminated policies, using a follow-up study of the mortality of those policies that terminated from a portfolio of life insurance contracts. The data has been obtained from a major insurer which traced the mortality of their policies withdrawn, for purposes of understanding the mortality antiselection, by obtaining their dates of death from the Social Security Administration office. Using a representative sample of this follow-up data, we modeled the time until a policy lapses and its subsequent mortality pattern. We find some evidence of mortality selection and we consequentially examined the financial cost of policy termination.     

基于LabWindows/CVI的SDR接收机中阶梯式AGC算法的设计与实现

现代宽带中频数字接收机以应用软件无线电技术最为热门,不仅接收频率范围广,而且调制解调类型丰富,更使许多功能实现了可维护性和可扩展性。文章针对这一发展趋势,利用虚拟仪器软件Lab Windows/CVI建立了通用的软件无线电接收机模型,并在此基础上重点对自动增益控制(Automatic Gain Control,AGC)算法进行了研究和仿真分析,提出了在ADC后端控制中使用阶梯式AGC微调算法的概念,对传统AGC实现进行了改进。经过试验测试,实现了预期效果。