设计模式在电网监控系统软件框架设计中的应用

面向对象的软件框架研究是软件面向对象技术研究的一个重要方面。设计模式在软件框架中的应用可以提高框架的可复用性和可扩展性。文中首先引入框架和设计模式的概念，然后介绍了电网监控系统软件框架，最后说明了设计模式在框架中的应用可以使其具有更好的可扩充性和可复用性。     

Design and implementation of a high‐efficiency bidirectional DC‐DC Converter for DC micro‐grid system applications

This paper studies the design and implementation of a non‐isolated dual‐half‐bridge bidirectional DC‐DC converter for DC micro‐grid system applications. High efficiency can be achieved under wide‐range load variations by the zero‐voltage‐switching features and an adaptive phase‐shift control method. A three‐stage charging scheme is designed to meet the fast‐charging demand and prolong the lifetime of LiFePO₄ batteries. A digital‐signal‐processing control IC is used to realize the power flow control, DC‐bus voltage regulation, and battery charging/ discharging of the studied bidirectional DC‐DC converter. Finally, a 10 kW prototype converter with Enhanced Controller Area Network communication function is built and tested for micro‐grid system applications. A light‐load efficiency over 96% and a rated‐load efficiency over 98% can be achieved. Copyright © 2013 John Wiley & Sons, Ltd.     

Prototype implementation of fast and secure traceability service over public networks

Internet communication message protocol (ICMP)‐based traceability methods are widely used to trace packets over the Internet; however, in their attacks, adversaries likewise use ICMP packets. Furthermore, the lack of security in ICMP‐based traceability results in failures for many current traceability methods. Moreover, current routers are unable to provide extended services to Internet users and applications. To address this need, our laboratory has introduced the service‐oriented router (SoR). SoR is middleware that can be implemented on a Cisco AXP and Juniper JunosV App Engine. In this paper, we propose a secure method of providing packet traceability over public networks using SoR features. We implemented a secure packet traceability service prototype on the ns‐3 simulator. The test results conclude that there is a maximum additional cost of 48.69 and 123.91 μs of processing overhead per packet in each hop when the proposed secured traceability service is used with a 128‐bit key space in AES‐GCM and AES‐CTR modes, respectively. Moreover, for 256‐bit key spaces, AES‐GCM and AES‐CTR modes consumed additional 47.18 and 123.25 μs, respectively, over the plain traceability. Yet, from the evaluations on the test bed topology, it clearly shown that the proposed method was 79% faster than the conventional trace route method in providing the secured end‐to‐end traceability. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

CNN‐based architecture for real‐time object‐oriented video coding applications

This paper presents a new CNN‐based architecture for real‐time video coding applications. The proposed approach, by exploiting object‐oriented CNN algorithms and MPEG encoding capabilities, enables low bit‐rate encoder/decoder to be designed. Simulation results using Claire video sequence show the effectiveness of the proposed scheme. Copyright © 2005 John Wiley & Sons, Ltd.     

面向对象的可视化电力系统分析软件研究

传统的编程技术是基于过程的,使得软件难以维护和发展,面向对象编程是一种新的编程手段,它通过从真实对象中派生出抽象的类,并通过继承的方法来构造程序结构,程序结构更加合理,易于开发,因此,面向对象编程是克服大型电力系统分析程序难于维护,发展与更新的一种选择。可视化技术改善了操作界面,讨论了如何从电力系统装置派生出程序中抽象的类,介绍了一种以面向对象编程和可视化编程为基础,兼顾计算效率和易用性的程序结构。     

面向对象的图形化地区电网继电保护整定软件研究

针对地区电网继电保护整定计算的特点和要求,作者研究了地区电网图形化整定计算软件的开发.该软件基于面向对象的弱耦合模块设计思想,保证了系统架构的强壮性和灵活性.图形平台中提出的捕捉点模型很好地实现了电气主接线图的网络拓扑自动跟踪.根据地区电网运行方式设定特点,在整定计算中引入了双层运行方式和归算电源的概念.采用通用核心算法的故障分析模块可同时为整定计算和定值校核提供全面的分析结果.具有开放性的整定专家知识库能灵活地适用于地区电网中繁复的整定计算工作.该图形化整定软件已投入实际使用.     

A multi‐agent approach to unit commitment

This paper proposes a multiagent system to power system unit commitment problems. Multiagent is a new paradigm for developing software applications. Coordinating the behavior of autonomous agents is a key issue in agent‐oriented programming techniques today. Recently, agents are being used in an increasingly wide variety of applications, ranging from comparatively small systems such as E‐mail filters to large, open, complex systems such as air traffic control. Though some agent frameworks have been proposed in the power system field, the number of studies is limited. In this paper, we developed a power system unit commitment application by multiagent architecture. Our multiagent system has the following characteristics: (1) The system consists of a single facilitator agent, two mobile agents, and one or more generator agents which are elements of power system network. (2) The facilitator agent is developed to act as a manager for the process by using the singleton design pattern. The mobile agents migrate to generator‐agents to increase or decrease their power generations. The generator agents have their operational data. (3) Message object is developed to communicate between the agents using KQML‐like object. The proposed approach is applied to a simple model system, and the results show that the multiagent system is an efficient decentralized approach for solving power system unit commitment problems. © 2002 Wiley Periodicals, Inc. Electr Eng Jpn, 141(2): 41–47, 2002; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.10057     

基于面向对象技术的三相潮流计算

在电力系统中 ,由于许多电气设备三相参数的不对称及三相负荷的不对称 ,导致整个系统经常处于一种不平衡的运行状态中。这样 ,传统的潮流计算方法 (基于系统三相平衡 )就无法使用 ,而要利用三相潮流计算进行分析。介绍了一种基于电流注入形式的三相潮流计算方法 ,并简要介绍系统中各元件包括静止补偿器 (STATCOM)的三相潮流计算模型。还介绍了基于面向对象技术的三相潮流程序的设计思想 ,对程序中类的定义及关系进行讨论。     

可容错软件自动生成系统--FTSAGS

在软件开发过程中采用避错设计、查错设计和容错设计技术是提高软件可靠性的基本途径。这里介绍了一种采用多个软件模块自动生成技术进行可靠性设计的系统。其主要功能是定义软件开发过程，指导、控制以使软件开发自动化。其目标是提供一个基于面向对象方法学的、高可靠性的软件开发平台。     

Robust intelligent PCA‐based face recognition framework using GNP‐fuzzy data mining

Traditional principal component analysis (PCA) based face recognition algorithms have a low recognition accuracy due to the influence of noise and illumination changes. This paper proposes a robust, intelligent PCA‐based face recognition framework in the complicated illumination database when using multiple training images per person (MTIP‐CID). There are mainly two improvements in the proposed method. One is that a face‐recognition‐oriented genetic‐based clustering algorithm is introduced to reduce the influence of a large number of classes on the classification accuracy in the MTIP‐CID. The other is that a classifier based on fuzzy class association rules (FCARs) is applied to mine the inherent relationships between eigenfaces and to improve the robustness of PCA‐based face recognition in noisy environments. Experimental results on the extended Yale‐B database demonstrate that the proposed framework performs better and is more robust against noise compared with other traditional face recognition algorithms, i.e. linear discriminant analysis (LDA) and local binary patterns (LBPs). © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Nonaveraged control‐oriented modeling and relative stability analysis of DC‐DC switching converters

This paper presents a unified and exact nonaveraged approach to derive a frequency‐domain control‐oriented model for accurate prediction of the fast timescale dynamics and performances of switching converters with fixed frequency naturally sampled pulse width modulation and integrating feedback loop. Because the approach avoids averaging and approximations related to this process, a very good accuracy of the derived model is obtained. The main difference between the presented approach and the existing methodology for accurately predicting the behavior of switching converters is that, here, we break the feedback loop and we focus on analyzing the open‐loop gain and the effect of the system parameters on relative stability. This results in an approach much similar to control systems techniques rather than nonlinear dynamical system approaches. Consequently, the relative stability is tackled easily in the frequency domain. In particular, by treating the modulator as a gain depending on the operating point, the new model is formulated in such a way that standard control‐oriented tools such as Bode diagrams and root‐loci can be easily used. Therefore, the proposed approach gives some important issues like gain and phase margins that are highly useful in controller design. It is noticed that the crossover frequency, gain, and phase margins predicted by using the averaged model may deviate significantly from the actual values given by the proposed approach. The paper points out the sources of discrepancies and the theoretical results are validated by simulations using a circuit‐level switched model.     

可视化输配电网状态分析软件包的开发与实现

以图形用户界面的实现为重点,介绍了可视化输配电网状态分析软件包括的开发设计思想和总结结构,阐述了该软件包括具备的功能和特点。软件包采用面向对象的思想,用Visual C＋＋进行开发,运行稳定、计算准确。     

Efficient optimization‐oriented design methodology of high‐order 3‐D filters using 2‐D and 3‐D electromagnetic simulators

This paper proposes a computationally highly efficient interface between two‐dimensional (2‐D) and three‐dimensional (3‐D) electromagnetic (EM) simulators for the optimization‐oriented design of high‐order 3‐D filters. In a first step, the novel optimization‐oriented design methodology aligns the 3‐D EM simulator response with the 2‐D EM simulator response of a low‐order 3‐D filter by using an inverse linear space mapping optimization technique. Then, a second mapping performs a calibration with the optimal 2‐D and 3‐D design parameters obtained from the first mapping. The optimization of high‐order filters is carried out using only the efficient 2‐D EM simulator, and the calibration equations directly give the design parameters of the 3‐D filter. The potential and the effectiveness of the proposed optimization‐oriented design methodology are demonstrated through the design of C‐band 3‐D evanescent rectangular waveguide bandpass filters with increasing orders from three to eight. Copyright © 2014 John Wiley & Sons, Ltd.     

A study on resource allocation with buying behavior in B to B commerce

B to B commerce is an important research issue for increasing the profitability in global markets. Sophisticated B to B commerce requires optimality in resource allocation based on the human behavior dynamism. A market‐oriented programming calculates a Pareto‐optimal resource allocation in the market by computing competitive equilibrium of an artificial economy. In this paper we propose a new resource allocation algorithm based on market‐oriented programming, which takes into account the consumers' buying behavior influencing the B to B commerce. According to this method, supply agents in the computational market decide their supply plan by estimating the demand agents' behavior. Careful constructions of the agents according to the buying behavior can lead to an efficient allocation of distributed resources, and the behavior of the agents can be analyzed in economic terms. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 153(1): 63–72, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20060     

A framework for high‐speed parallel‐prefix adder performance evaluation and comparison

A new framework is proposed for the evaluation and comparison of high‐speed parallel‐prefix adders. The framework specifies input registers and latches and requires sum feedback for single cycle pipelined operation. Test pattern generation is also specified. A newly revised energy‐efficient 64‐bit carry select adder with distributed mixed valence logic to help reduce fan‐out and wire load is presented. Footless pulsed‐precharge domino and compound domino circuits, and smaller transistors help to reduce area and power. Detailed simulations with 65 nm CMOS models are compared with other parallel‐prefix adders that have been instantiated for comparison. Within this framework, energy reductions of 40% are obtained for the new adder versus two leading Kogge‐Stone designs, and 25% versus a new constant delay logic Sklansky style design, at similar cycle times. Copyright © 2014 John Wiley & Sons, Ltd.     

Experimental investigation of a speed‐sensor‐less IM drive system under Inverter fault‐tolerant control

This paper proposes an algorithm for fault tolerance of three‐phase, inverter‐fed, speed‐sensor‐less control of a three‐phase induction motor drive system. The fault tolerance of the inverter when one switch is open or one leg of six‐switch inverter is lost is considered. The control of the drive system is based on indirect rotor field‐oriented control theory. Also, the speed estimator is based on model reference adaptive system (using stator current and rotor flux as state variables for estimating the speed). The fault‐tolerant algorithm is able to adaptively change over from a six‐switch inverter to a four‐switch inverter topology when a fault occurs; also, it makes a smooth transition of the motor speed, torque, and current when changing over from a faulty condition to a new healthy status, which is four‐switch three‐phase inverter (FSTPI) topology; thus, the six‐switch three‐phase inverter (SSTPI) topology (pre‐fault status) is almost retained for the medium‐power range of induction motor applications. The proposed algorithm is simulated by using the MATLAB/SIMULINK package. Also, the proposed control system is tested experimentally using a digital signal processor (DSP1104). The obtained results from the simulation model and experimental system demonstrate the performance enhancement and good validity of the fault‐tolerance control for the speed‐sensor‐less induction motor drive system. © 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

Watermarking on CNN‐UM for image and video authentication

In this paper a new approach to fragile watermarking technique is introduced. This problem is particularly interesting in the field of modern multimedia applications, when image and video authentication are required. The approach exploits the cellular automata suitability to work as pseudorandom pattern generators and extends the related algorithms under the framework of the cellular non‐linear networks (CNNs). The result is a novel way to perform watermarking generation in real time, using the presently available CNN‐universal chip prototypes. In this paper, both the CNN algorithms for fragile watermarking as well as on‐chip experimental results are reported, confirming the suitability of CNNs to successfully act as real‐time watermarking generators. The availability of CNN‐based visual microprocessors allows to have powerful algorithms to watermark in real time images or videos for efficient smart camera applications. Copyright © 2004 John Wiley & Sons, Ltd.     

Context‐based robust face detection algorithm for surveillance cameras

This paper describes a context‐based robust face detection algorithm for surveillance cameras. Different from familiar faces captured by digital cameras, faces captured by surveillance cameras are smaller and darker with motion blurs and distortions. Furthermore, captured from top‐mounted cameras, facial images are downward and partially hidden. Just using a single‐face detector to detect such degraded faces is very difficult. To solve the problem, we utilize contextual information about faces of walking people. We employ a probabilistic face detection framework combining a face detector with local and global contextual information. We use a boosted fast face detector as an initial selector to pick up a small number of possible face regions in a very short time. After the fast selection of candidate face patches, as local contextual information we calculate a conditional probability in the surrounding regions using a histogram of oriented gradient (HOG) feature‐based outline detector, and as global contextual information we calculate possible face patches from viewpoint information using vanishing point detection. Combining a fast boosted face detector with these contextual information, while keeping computational efficiency of the original boosted face detector, we achieved a high face detection rate of 93.7% with about 1000 times lower false‐positive rate than when using a single original face detector. © 2012 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

基于Blackfin DSP的虚拟数字万用表设计与实现

本文设计了基于Blackfin DSP虚拟数字万用表.并且给出了面向对象的PC控制程序,以及基于ADI公司的ADSPBF531芯片的嵌入式操作系统的硬件及软件实现方案.该万用表可以完成对直流电压,交流电压,直流电流,交流电流,电阻等量的测量,并且可以完成数据的存储和万用表巡检(就是万用表按照设定进行自动采集前端信号),还有高速数据采集功能.该设计能够满足客户目前及未来测试需求的多用途解决方案.实现结果表明该设计方案合理、可靠,并具有十分方便的用户可操作性.     

运用面向对象的方法设计人机系统

总结人机系统的现状,介绍了将面向对象的方法运用到设计人机系统中的优越性,并简单介绍了运用面向对象的分析,面向对象的设计和面向对象的编程方法,设计和开发开放式,分布式,面向对象的人机系统。