密码芯片电磁信息泄漏评估方法研究

基于半定制集成电路设计流程,提出一种对CMOS集成电路进行电磁信息泄漏评估的方法。该方法首先利用综合工具生成电路的门级网表,将门级网表中的普通单元替换为防护逻辑单元,然后利用电磁辐射仿真模型和电磁信息泄漏评估模型对集成电路进行电磁辐射仿真和信息泄漏分析。该方法能够在设计阶段对密码芯片的抗电磁旁路攻击能力进行评估,可提高密码芯片的设计效率,减少资源浪费。     

Contractual agreements for coordination and vendor‐managed delivery under explicit transportation considerations

We consider the coordination problem between a vendor and a buyer operating under generalized replenishment costs that include fixed costs as well as stepwise freight costs. We study the stochastic demand, single‐period setting where the buyer must decide on the order quantity to satisfy random demand for a single item with a short product life cycle. The full order for the cycle is placed before the cycle begins and no additional orders are accepted by the vendor. Due to the nonrecurring nature of the problem, the vendor's replenishment quantity is determined by the buyer's order quantity. Consequently, by using an appropriate pricing schedule to influence the buyer's ordering behavior, there is an opportunity for the vendor to achieve substantial savings from transportation expenses, which are represented in the generalized replenishment cost function. For the problem of interest, we prove that the vendor's expected profit is not increasing in buyer's order quantity. Therefore, unlike the earlier work in the area, it is not necessarily profitable for the vendor to encourage larger order quantities. Using this nontraditional result, we demonstrate that the concept of economies of scale may or may not work by identifying the cases where the vendor can increase his/her profits either by increasing or decreasing the buyer's order quantity. We prove useful properties of the expected profit functions in the centralized and decentralized models of the problem, and we utilize these properties to develop alternative incentive schemes for win–win solutions. Our analysis allows us to quantify the value of coordination and, hence, to identify additional opportunities for the vendor to improve his/her profits by potentially turning a nonprofitable transaction into a profitable one through the use of an appropriate tariff schedule or a vendor‐managed delivery contract. We demonstrate that financial gain associated with these opportunities is truly tangible under a vendor‐managed delivery arrangement that potentially improves the centralized solution. Although we take the viewpoint of supply chain coordination and our goal is to provide insights about the effect of transportation considerations on the channel coordination objective and contractual agreements, the paper also contributes to the literature by analyzing and developing efficient approaches for solving the centralized problem with stepwise freight costs in the single‐period setting. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

单通道自适应有源消声系统

对单通道自适应有源消声系统进行了频域分析,对系统的有关特性进行了讨论,并分别在半消声室和普通房间进行了降噪实验。在误差传声器周围取得了一定的有效空间范围。     

现代舰载光电装备与高科技局部海战

以现代物理、计算机、自动控制、信息处理与融合等高新技术为支撑的现代舰载光电装备技术,在现代海战中有着举足轻重的作用.根据现代海战的基本特点,论证了高科技局部海战对光电装备的3大需求,阐述了现代舰载光电装备的类别及其发展趋势.     

电话地球站 (TES) 网管仿真训练系统的设计与实现

在 TES通信网络中 ,网管起着关键的作用 ,对网管操作人员提出了特殊的要求。本着提高网管操作人员的业务水平 ,保证 TES通信网络的正常运营 ,使用最新的多媒体技术、计算机技术、可视化技术、交互仿真技术、关系数据库技术和面向对象的程序设计方法 [1 ] [2 ] ,设计开发出一套比较完善的网管仿真训练系统。该仿真训练系统完全实现了网管中心的主要功能 ,给网管操作人员提供了一套新颖高效的训练环境和训练方法     

干扰近似OFDM/OQAM系统半盲信道估计

非合作通信背景下,针对传统干扰近似法（Interference Approximate Method, IAM）进行OFDM/OQAM系统信道估计需要导频符号值作为先验信息的问题,提出一种基于OQAM符号特征的IAM（OQAM Characteristic Based-IAM,OCB-IAM）估计算法。该算法利用OQAM实符号的有限集特征,将信道衰落系数幅度和相位分开估计,在仅获得导频位置而未知导频符号值的条件下实现了OFDM/OQAM系统半盲信道估计。并且证明了OCB-IAM算法由于利用接收符号的二阶统计量将高斯白噪声变为非随机的单音干扰,从而在中低信噪比条件下具有优于IAM算法的估计性能。仿真实验验证了理论推导的正确性和OCB-IAM算法的可靠性。     

光纤在遥控武器站火控系统中的应用

通过对光纤及光纤通讯关键技术和设备的介绍,提出在遥控武器站火控系统中利用光纤传输方式实现系统高速、高带宽视频、总线、IO信号的传输方式。通过光电转换单元的模块化设计,与系统部件有效集成,减少部件数量,优化系统网络。基于CPLD技术的电路设计,有效减小电路板尺寸,缩短设计周期,提高工作可靠性。设计紧凑、合理的光纤旋转连接器及光纤链路形式,有效保证链路的插入损耗,高质量完成信息传输。运用时分复用/解复用技术拓展传输带宽,为系统的升级和扩展预留了充分的空间。结合工程实际提出光纤通讯目前存在的主要问题并给出相应的解决方案。     

铁路区间信号系统测试评估平台——信息传输通道的建模及仿真研究

铁路区间信号系统测试评估平台的研究是为了实现对信号系统的功能、可靠性及安全性的自动测试和评估,并为区间信号系统的研发或维护提供测试手段.铁路区间信号系统信息传输通道,作为铁路区间信号传输的途径,是铁路区间信号系统测试评估平台的重要研究对象,因此,信息传输通道仿真子系统是测试平台的一个关键子系统.针对移频自动闭塞系统信息传输通道的仿真,提出一种新的差分方程建模方法,并进行了仿真实现.     

基于模拟退火算法的阵列模型有源校正方法

针对同时存在通道幅度相位不一致与阵列互耦的均匀直线阵列,提出了一种采用模拟退火算法的阵列模型校正方法.该方法使用多个辅助信源分时工作,根据子空间基本原理构造目标函数,采用模拟退火算法对幅相误差矩阵及互耦矩阵进行估计.利用该方法对均匀直线阵进行了计算机仿真与实测实验,仿真及实验结果证明了该方法是有效可行的.     

运用心理学相关理论培育军人核心价值观

培育军人核心价值观,是当前部队思想政治教育的重中之重,其培育途径尤为重要,笔者认为,可以通过培养与激发官兵亲社会行为,来推动与促进军人核心价值观的培育。运用心理学的相关理论,促进亲社会行为的概念与特征、亲社会行为与军人核心价值观的有机结合,培育军人核心价值观。