GDMO模板在CORBA中的映射实现

分析了GDMO模板到IDL接口的映射方案 ,并对方案中存在的语意丢失现象进行分析 ,提出在对GDMO模板中的行为模板形式化描述的基础上映射到IDL接口的方法     

自动控制中的网络技术

计算机控制技术在制造自动化领域应用越来越广泛,工业控制局域网在普遍局域网基础上兼顾控制现场的实时性、可靠性等特殊要求,是实现控制、管理等综合自动化的关键。叙述了基于计算机网络技术分布式控制实现原理,并结合西门子的PLC网络的实例介绍了工业控制局城网的具体实现。     

加强毕业设计(论文)环节控制的研究与实践

对如何提高毕业设计(论文)环节的质量作了一些有益的探讨,通过实行集成综合兴趣度的课题双向选择、加强教师的责任意识、完善监督和检查机制、改革成绩评定方法和激励措施等方法,逐步实现了对毕业设计(论文)教学环节实施全过程、全方位的管理和监控,为教学质量的提高提供了保障。通过在重庆邮电大学经济管理学院的教学实践表明,这些方法和措施能有效地提高毕业设计环节(论文)的教学效果。     

Lightweight Privacy-Aware Yet Accountable Secure Scheme for SM-SGCC Communications in Smart Grid

Smart grid is envisioned as a critical application of cyber-physical systems and of the internet of things.In the smart grid,smart meters equipped with wireless sensors can upload meter readings (data) to smart grid control and schedule centers via the advanced metering infrastructure to improve power delivery efficiency.However,data gathered in short intervals,such as 15minutes,will expose customers’ detailed daily activities (for example,when they get up and when they use oven) using nonintrusive appliance load monitoring.Thus,data must be hidden to protect customers’ privacy.However,data accountability is still required for emergency responses or to trace back suspected intrusions,even though the data is anonymous.In addition to desired security requirements,this imposes two extra tasks:Sensors in smart meters usually have resource constraints;thus,the desired security protocols have to remain lightweight in terms of computation and storage cost.Furthermore,scalability and flexibility are required since there exist vast meters.This paper presents a lightweight Privacy-aware yet Accountable Secure Scheme called PASS which guarantees privacy-aware accountability yet tackles the above challenges in the smart grid.A formal security analysis justifies that PASS can attain the security goals,while a performance analysis verifies that PASS requires few computations,and is scalable and flexible.     

低密度格码编译码原理及其性能仿真

低密度格码(low density lattice codes,LDLC)是一种崭新的信道编码技术,与LDPC(lowdensity parity check)的译码类似,校验矩阵H都是稀疏的,都通过迭代的消息传递过程来实现其译码,但不同的是:LDPC传递的信息是标量值,而LDLC的信息是(-∞,∞)上的概率密度函数(PDF)。当存在高维n的H,且噪声方差σ2ndet(H)2/2πe时,LDLC可以以任意小的误差传输,det(H)=1。给出低密度格码的基本原理,并对其编译码算法的实现做详细介绍,最后通过仿真给出其在AWGN信道下的性能。     

频率响应的有效计算技术——图论方法的成功应用(英文)

本文研究了多输入—多输出系统。为了得到该系统的预解矩阵φ(s)=(s1-A)~(-1)和频率响应,给出了基于Coates图的—种有效算法。不仅能迅速地产生1-因子和1-因子连接,而且还能自动地给出正确的符号。计算结果表明与Kisslinger和Vetsch给出的结果一致。一般说来,该方法所得的结果要优于某些常用的数值方法。因此,该方法将能获得重要的工程应用。     

A Model-Free Method for Structual Change Detection Multivariate Nonlinear Time Series

1 .MOTIVATIONANDINTRODUCTIONRecently ,therehavebeenseveralnewtheoreticalre sultsforstationaryandnonstationarydynamicmod els ,nonlinearregressionmodel,simultaneousequa tionandEulerequationmodels.JournalofEconometrics( 1 996) publishedaspe cialvolumetobringtogetherahostofpapers,whichreflectsthediversityoftherecentdevelopmentsonthissubject.Thisvolumeismainlyfocusedonthefollowingaspects:finite sampletestsofparameterconstancyagainstthepresenceofstructuralchange,asymptotic proceduresformod…     

实时E-mail通知系统的设计与实现

分析了现有 Ｅｍａｉｌ 系统的优缺点,提出了一种实时的 Ｅｍａｉｌ 来信通知系统的实现方案,并给出了系统框图,最后针对具体的软硬件环境,阐述了系统的实现方法。     

An MID-Based Load Balancing Approach for Topic-Based Pub-Sub Overlay Construction

A large proportion of Internet of Things (IoT) applications are internally publish/subscribe in nature,and traditional architecture cannot support them efficiently and flexibly.In essence,supporting efficient publish/subscribe systems requires data-oriented naming and efficient multicast.Since deployment of native IP-based multicast has failed,overlay-based multicast has become the practical choice.Since load balancing between heterogeneous nodes is an important issue,designing an optimal load balancing ove...