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2008 IEEE International Multitopic Conference最新文献

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Ellipses resolution in WH-constructions in Pashto 普什图语wh结构中的省略号解析
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777777
M. Ali, M.A. Khan, R. Ali
The constructions in Pashto, having a question involving a WH-word equivalent and an answer or response to that question, are called WH-constructions. In most of the cases, in both written and spoken WH-constructions, there occur ellipses among them. This paper presents the first ever rulebased algorithm and the factors involved in ellipses resolution in WH-constructions in Pashto text. The algorithm resolves ellipses occurring in the answers to WH-questions by using the morphological and syntactic information of both the question and its corresponding answer. The algorithm accurately resolves the ellipses occurring in the answers to the questions having WH-words i.e. (Who-Dir), (Who-Obl), (What), (Which), (Where) and (How much) among them. The algorithm has been tested on real world text of Pashto taken from various genres such as books, novels, newspapers and online magazines. The algorithm achieved an accuracy of 76%.
在普什图语中,如果一个问题包含一个与“wh”对应的词以及对这个问题的回答或回应,这种结构就被称为“wh”结构。在大多数情况下,在书面和口头的wh结构中,都出现了省略号。本文提出了首个基于规则的普什图语文本中whi结构中省略号解析的算法及其影响因素。该算法利用问题及其对应答案的形态和句法信息来解决wh问题答案中出现的省略号。该算法准确地解析出含有WH-words的问题的答案中出现的省略号,即(Who-Dir)、(Who-Obl)、(What)、(Which)、(Where)和(How much)。该算法已经在现实世界的普什图语文本中进行了测试,这些文本来自各种类型的书籍、小说、报纸和在线杂志。该算法的准确率达到76%。
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引用次数: 4
Adaptive neuro-wavelet system for the robust control of switching power supplies 开关电源鲁棒控制的自适应神经小波系统
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777697
H. Bouzari, H. Moradi, E. Bouzari
In this study, a new method for designing an adaptive controller based on Wavelet Neural Networks, is represented. The proposed controlling method is based on a Neuro-Wavelet controller and a robust controller. The Neuro-Wavelet controller is designed to emulate an ideal controller and a robust controller is designed to recover the residual approximation for ensuring the stable control performance. The adaptive law is derived on the basis of Lyapunov stability theorem, so, the stability of the under controlled system is guaranteed, when no exact condition or no prior knowledge is available. Moreover, to relax the requirement for a known bound on aggregated uncertainty, which comprises a minimum approximation error, optimal network parameters and higher order terms in a Taylor series expansion of the wavelet functions, a system with adaptive bound estimation was investigated for the control of a forward switch mode power supply. In addition, numerical simulation results show that the dynamic behaviors of the proposed systems, due to periodic commands, are robust with regard to parameter variations and external load resistance disturbance.
本文提出了一种基于小波神经网络的自适应控制器设计方法。提出了一种基于神经小波控制器和鲁棒控制器的控制方法。设计了神经小波控制器来模拟理想控制器,设计了鲁棒控制器来恢复残差近似,以确保稳定的控制性能。根据Lyapunov稳定性定理推导出了自适应律,从而保证了被控系统在没有精确条件或没有先验知识的情况下的稳定性。此外,为了满足小波函数泰勒级数展开式中包含最小逼近误差、最优网络参数和高阶项的聚合不确定性已知界的要求,研究了一种具有自适应界估计的前向开关电源控制系统。此外,数值仿真结果表明,由于周期指令的存在,所提出的系统在参数变化和外部负载阻力干扰下具有鲁棒性。
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引用次数: 4
Median path loss, fading and coverage comparison at 3.5GHz and 700MHz for mobile WiMax 移动WiMax在3.5GHz和700MHz下的中位数路径损耗、衰落和覆盖比较
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777747
M. Rizwan, S. Abbas
This paper describes a microcellular type propagation environment model that is typical in the Defence Housing Authority in Pakistan. Broadband Access systems are being deployed in this environment. Propagation characteristics in this environment have been investigated in this paper for the typically deployed frequency of 3.5 GHZ. Median path loss, fading and coverage is being reported for propagation at 3.5 GHz band and has been compared with a new band that is being opened up for Broadband wireless access across the globe in the 700 MHz band. The simulation method is based on the quite commonly used ray tracing technique.
本文描述了巴基斯坦国防住房管理局典型的微细胞型传播环境模型。宽带接入系统正在这种环境中部署。本文研究了该环境下典型部署频率为3.5 GHZ的传输特性。报告了3.5 GHz频段传播的中位数路径损耗、衰落和覆盖情况,并与正在全球范围内开放的700 MHz频段宽带无线接入的新频段进行了比较。模拟方法是基于非常常用的光线追踪技术。
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引用次数: 5
A Genetic Algorithm based solution to three dimensional Direction of Arrival (DOA) problem 基于遗传算法的三维到达方向问题的求解
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777780
E. Elahi, A. Naeem, I. Elahi
Estimating Direction of Arrival (DOA) of a signal in three dimensional space is a procedure which is difficult to perform in a reverberant and noisy environment, yet it demands high degree of precision. One of the most reliable techniques under reverberant conditions is Multi-Sensor Steered Response Power with Phase Transform filter (SRP-PHAT) but it is computationally exhaustive if performed using traditional calculus based techniques. So this paper proposes a different and computationally efficient approach to solve the DOA problem, one that is based on searching and optimization capabilities of Genetic Algorithms. In this paper, for the purpose of application of genetic algorithm, SRP-PHAT to estimate DOA is modeled as an optimization problem. To speed up the process of global convergence of genetic algorithm, this paper describes a procedure which can act as a precursor for the design and implementation of a parallel architecture for DOA estimation. To prove the efficacy of the solution, various performance curves have been included which show that the proposed solution is superior to traditional techniques and the last section describes the computational load of the proposed technique and compares it with two other conventionally employed techniques.
三维空间信号的到达方向估计是一个在混响和噪声环境下难以实现的过程,但它对精度要求很高。在混响条件下最可靠的技术之一是带相位变换滤波器的多传感器转向响应功率(SRP-PHAT),但如果使用传统的基于微积分的技术进行计算,则计算非常详尽。因此,本文提出了一种不同的、计算效率高的方法来解决DOA问题,该方法基于遗传算法的搜索和优化能力。为了应用遗传算法,本文将SRP-PHAT估计DOA建模为一个优化问题。为了加快遗传算法的全局收敛速度,本文描述了一个可作为并行DOA估计架构设计和实现的先导程序。为了证明该解决方案的有效性,包含了各种性能曲线,表明所提出的解决方案优于传统技术,最后一节描述了所提出的技术的计算负载,并将其与其他两种传统技术进行了比较。
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引用次数: 2
Modeling Verilog designs using a value-based model 使用基于值的模型建模Verilog设计
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777709
Naveed Riaz
Model-based diagnosis (MBD) is a well known (AI) technique for localizing faulty components in physical systems. A prerequisite for the application of model based diagnosis is the representation of the physical system as a model. Developing models for fault localization in HDL designs has been an active research area in recent years. Whereas Verilog is considered the most widely used HDL, research on fault localization has mainly focused on the VHDL domain. The research presented herein reports on a novel logical model for Verilog designs that can be automatically derived from the source program and can be directly used by a model-based diagnosis engine for computing diagnoses. We also point out some notable semantic differences between VHDL and Verilog and discuss its implications on debugging model.
基于模型的诊断(MBD)是一种众所周知的(AI)技术,用于定位物理系统中的故障部件。应用基于模型的诊断的先决条件是将物理系统表示为模型。近年来,开发HDL设计中的故障定位模型是一个活跃的研究领域。虽然Verilog被认为是应用最广泛的高密度语言,但故障定位的研究主要集中在VHDL领域。本文的研究报告了一种新的Verilog设计逻辑模型,该模型可以从源程序自动导出,并可直接用于基于模型的诊断引擎进行计算诊断。我们还指出了VHDL和Verilog之间一些显著的语义差异,并讨论了其对调试模型的影响。
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引用次数: 0
A comparative study of MI tools: Defining the Roadmap to MI tools standardization MI工具的比较研究:定义MI工具标准化的路线图
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777767
M. I. Sarwar, W. Tanveer, I. Sarwar, W. Mahmood
Software maintainability has always been a significant factor in the success or failure of any software product. There are numerous ways to calculate software maintainability but none of them has been able to grab as much industrial acceptance as the maintainability index (MI). MI can be calculated with the help of various tools, however selection of an appropriate tool for specific application is a critical research issue. This indicates that there is a dire need to clearly identify behavior of MI tools used for calculating software maintainability for various software source code scenarios. For this purpose we have analyzed behaviors of various MI tools with different MI parameters using a variety of test scenarios. We have developed a set of benchmark MI parameters test-cases for available MI tools to compare their results on the basis of features they support. We then executed the test scenarios on selected proprietary and open-source MI tools and evaluated their strengths and weaknesses on the basis of test results. The results highlighted weaknesses of some of the MI tools and helped us in making recommendations for selection of appropriate tool for specific application having better ability to determine the maintainability of the software system in terms of ldquomaintainability indexrdquo.
软件的可维护性一直是决定任何软件产品成败的重要因素。计算软件可维护性的方法有很多,但没有一种方法能像可维护性指数(MI)那样得到业界的广泛认可。MI可以在各种工具的帮助下计算,但是为特定应用选择合适的工具是一个关键的研究问题。这表明,迫切需要清楚地识别用于计算各种软件源代码场景的软件可维护性的MI工具的行为。为此,我们使用各种测试场景,分析了具有不同MI参数的各种MI工具的行为。我们已经为可用的MI工具开发了一组基准MI参数测试用例,以便根据它们支持的特性比较它们的结果。然后,我们在选定的专有和开源MI工具上执行测试场景,并根据测试结果评估它们的优点和缺点。结果突出了一些MI工具的弱点,并帮助我们为特定应用程序选择合适的工具提供建议,这些工具具有更好的能力,可以根据可维护性指数确定软件系统的可维护性。
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引用次数: 5
Effects of flexible power cables on harmonic generation of an arc furnace steel plant 柔性电缆对电弧炉炼钢厂谐波产生的影响
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777699
H. Khoshkhoo, S. Sadeghi, R. Moini, M. Jabbari
A three-phase dynamic arc furnace model is presented to investigate the effect of flexible power cables oscillations on harmonic generation of an arc-furnace steel plant. In this model, the flexible cables are presented by a varying three-phase inductor bank connected in series to the arc furnace. The self and mutual inductances of the inductors are calculated at each time step, using the shape of the cables. The shape of each cable is, in turn, obtained using the arc-furnace current computed in the preceding time step. The simulation results show that the inclusion of the flexible power cables in the arc furnace model does not have a significant effect on the magnitudes of the plant generated harmonics. However, the cables oscillations can remarkably affect the level of unbalancy in the three-phase system.
建立了电弧炉三相动态模型,研究了柔性电缆振荡对电弧炉炼钢厂谐波产生的影响。在该模型中,柔性电缆由串联连接到电弧炉的可变三相电感组来表示。利用电缆的形状,在每个时间步长计算电感器的自感和互感。每根电缆的形状依次由前一时间步计算的电弧炉电流得到。仿真结果表明,在电弧炉模型中加入柔性电力电缆对工厂产生的谐波大小没有显著影响。然而,电缆的振荡会显著影响三相系统的不平衡程度。
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引用次数: 0
Satellite Imagery Security Application (SISA) 卫星影像保安应用(SISA)
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777741
M. Usama, M.K. Khan
With the large-scale research and development in space sciences, space technologies, and network communication technologies, there is a great demand of satellite imagery security system for providing secure storage and transmission of satellite imagery over internet and/or shared network environment. This brings new challenges to protect sensitive and critical satellite imagery from unauthorized access and illegal use in order to keep the storage and transmission process secure and reliable. Therefore there is strong need of satellite imagery encryption and decryption application for security. Satellite imagery security application (SISA) is an information security application developed for satellite imagery. The application supports new and modified version two most popular data encryption standards named as data encryption standard (DES) and advanced encryption standard (AES). This paper investigates the security and performance level of the new modified version DES and AES for satellite imagery. The method of application of DES and AES on the satellite imagery in each case is explained. The application provides conventional tools of measurement and analysis such as key sensitivity, statistical and performance analysis to determine the level of security, reliability and performance.
随着空间科学、空间技术和网络通信技术的大规模研究和发展,卫星图像安全系统在互联网和/或共享网络环境下提供安全存储和传输卫星图像的需求很大。这为保护敏感和关键的卫星图像免受未经授权的访问和非法使用,以保持存储和传输过程的安全可靠带来了新的挑战。因此,对卫星图像加解密应用的安全性有着强烈的需求。卫星图像安全应用(SISA)是针对卫星图像开发的信息安全应用。该应用程序支持两种最流行的数据加密标准,即数据加密标准(DES)和高级加密标准(AES)的新版本和修改版本。本文研究了新修改版卫星图像DES和AES的安全性和性能水平。说明了在每种情况下,DES和AES在卫星图像上的应用方法。该应用程序提供了传统的测量和分析工具,如密钥灵敏度、统计和性能分析,以确定安全性、可靠性和性能水平。
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引用次数: 0
Towards a better control of change impact propagation 朝着更好地控制变更影响传播的方向发展
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777770
A. Ahmad, H. Basson, L. Deruelle, M. Bouneffa
The software evolution requires an exhaustive understanding of all the artifacts or components composing the software. In fact, any intended change may generate an impact propagated to the various software components through the different kind of relationships relating them. This situation is generally called the ripple effect and may cause several types of damages or side effects. In this paper, we focus on the potential flow of change impact propagation as provoked by the carried out change. For that purpose, we propose a structural model of software evolution (SMSE). This model is intended to represent and manage the different software artifacts and their relationships. The instantiated SMSE is used to built a knowledge base system providing, among other facilities, an assistance to the designer (or engineer) of software evolution for an a priori assessment of the change impact. The major aim of the system is to help a systematic analysis of the change impact and the identification of its propagation.
软件发展需要对组成软件的所有工件或组件有详尽的了解。事实上,任何预期的变更都可能通过不同类型的关系传播到不同的软件组件。这种情况通常被称为连锁反应,并可能导致几种类型的损害或副作用。在本文中,我们关注的是变更影响传播的潜在流,这是由执行的变更引起的。为此,我们提出了软件演化的结构模型(SMSE)。该模型旨在表示和管理不同的软件工件及其关系。实例化的SMSE用于构建一个知识库系统,在其他设施中,为软件开发的设计者(或工程师)提供对变更影响的先验评估的帮助。该系统的主要目的是帮助系统地分析变化的影响并确定其传播。
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引用次数: 6
Evaluation of control flow traces in software applications for intrusion detection 入侵检测软件应用中控制流轨迹的评估
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777765
Imran Asad Gul, Nils Sommer, Matthias Rohr, Andre van Hoom, Wilhelm Hasselbring
Software security has become an important requirement, particularly for systems that are publicly accessible through the Internet. Such systems can be equipped with intrusion detection systems to uncover security breaches. In this paper, we present a novel application-level intrusion detection approach. A normal behavior profile is created from application-internal control flow in terms of operation execution traces. Anomalous control flows indicative for intrusion attempts are detected by continuously monitoring and analyzing the software system. A case study demonstrates the intrusion detection approach's applicability in the context of a multi-user Java Web application.
软件安全已经成为一个重要的要求,特别是对于那些可以通过Internet公开访问的系统。这种系统可以配备入侵检测系统,以发现安全漏洞。本文提出了一种新的应用层入侵检测方法。根据操作执行跟踪,从应用程序内部控制流创建正常的行为概要文件。通过对软件系统的持续监测和分析,检测出提示入侵企图的异常控制流。一个案例研究演示了入侵检测方法在多用户Java Web应用程序上下文中的适用性。
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引用次数: 6
期刊
2008 IEEE International Multitopic Conference
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