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2007 10th international conference on computer and information technology最新文献

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Information theoretic SOP expression minimization technique 信息论SOP表达式最小化技术
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579404
Md Faisal Kabir, S. Aziz, S. Ahmmed, C.M. Rahman
The efficient design of multiple Boolean functions is becoming important and necessary during computer aided design for circuit and systems (CADCS), especially the manufacture of chips have reached a density of several ten thousands transistors per chip, so called very large scale integration (VLSI). To simplify the Boolean expressions by conventional approaches like graphical observation-based K-MAP or other simplification procedures become tedious or even impossible when the number of variables in a truth table exceeds certain limit. In this paper we propose an information theory based circuit designing approach for deriving minimal sum of product (SOP) expressions for unlimited number of variable. We have verified our approach on a number of cases with the conclusion that the proposed approach is a better alternative to conventional approaches particularly when the numbers of variables restrict the use of conventional approaches. The key feature of proposed method is that it performs a hill-climbing search through the state space of Boolean variables using information theoretic heuristic to find the minimal SOP expression.
多布尔函数的高效设计在计算机辅助电路与系统设计(CADCS)中变得越来越重要和必要,特别是芯片的制造已经达到了每片数万个晶体管的密度,即超大规模集成电路(VLSI)。当真值表中变量的数量超过一定限制时,通过基于图形观察的K-MAP或其他简化过程等传统方法来简化布尔表达式变得繁琐甚至不可能。本文提出了一种基于信息论的电路设计方法,用于求无限变量的最小积和(SOP)表达式。我们在一些情况下验证了我们的方法,得出的结论是,所建议的方法是传统方法的更好替代方法,特别是当变量的数量限制了传统方法的使用时。该方法的主要特点是利用信息启发式方法在布尔变量的状态空间中进行爬坡式搜索,以找到最小的SOP表达式。
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引用次数: 2
Cross-layer design of wireless networking for Parallel Loading of Access Points (PLAP) 面向接入点并行加载(PLAP)的无线网络跨层设计
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579444
K. S. Arefin, E. Ahmed
This paper processes a new cross-layer framework design for Parallel Download and Upload (PDU). This technique has been called as Parallel Loading of Access Points (PLAP). We have shown here our PLAP for Access Point (AP) and integrate Ad-hoc Procedure with AP to support the parallel download or upload applications. The results show that the proposed PLAP mechanism is faster and efficient for service setup and maintenance.
本文提出了一种新的并行下载与上传(PDU)跨层框架设计。这种技术被称为并行加载接入点(PLAP)。我们在这里展示了用于接入点(AP)的PLAP,并将Ad-hoc过程与AP集成以支持并行下载或上传应用程序。结果表明,所提出的PLAP机制对于服务的建立和维护具有较快的效率。
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引用次数: 4
Multiple description image transmission for diversity systems over unreliable communication networks 分集系统在不可靠通信网络上的多描述图像传输
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579397
M. Razzak, F. Ndiaye, S.A. Chowdhury, N. Mansoor
In this article, the development of an efficient and reliable multiple description coding (MDC) scheme over unreliable communication networks is described. A general framework of multiple description robust communication system with 2- and 4-channel cases is presented with a proposed block-based DC separation approach. The advantage of this system is that, if all the channels work, a high quality reconstruction can be achieved, while a lower but still acceptable quality can be achieved if some of the channels are lost. The peak signal-to-noise ratio (PSNR), mean squared error (MSE), bit rate, entropy and redundancy are also calculated with the proposed method to analyze the reconstruction quality. It is found that the proposed method gives comprehensive improvements over the other recently developed methods.
本文介绍了在不可靠通信网络上开发一种高效可靠的多描述编码(MDC)方案。提出了一种基于分块的直流分离方法,并给出了2路和4路多描述鲁棒通信系统的总体框架。该系统的优点是,如果所有信道都工作,则可以实现高质量的重建,而如果某些信道丢失,则可以实现较低但仍然可以接受的质量。计算峰值信噪比(PSNR)、均方误差(MSE)、比特率、熵和冗余,分析重构质量。结果表明,所提出的方法比其他最近发展起来的方法有了全面的改进。
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引用次数: 4
A study on computerized Emigration Clearance system of Bangladesh: Step toward e-Governance 孟加拉电脑化移民通关系统研究:迈向电子治理
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579409
A. Hossain
The ultimate objective of e-governance is to establish good governance. The elements of good governance can be identified as follows: a. Efficiency b. Reliability c. Accountability d. Accessibility and Transparency e. Visionary in decision making. All of these elements can be achieved through proper implementation of e-governance. Already Government of Bangladesh (GOB) takes several projects to implement it. Here we discuss about a GOB office named Bureau of Manpower Employment & Training (BEMT) who uses ICT very efficiently. Since 1976 BMET has been processing ldquolabour migrationrdquo manually. Measures to develop a congenial atmosphere in migration process and to develop institutional framework a computer database network has been established in 2004. Prospective job-seekers register their name and other particulars at DEMO. Selection of candidates for the overseas market is done from this database. Emigration clearance is also being provided from this database by BMET through computer network. Its capacity and activities are continued mainly to issuing emigration clearance for those who have been offered an overseas employment by either private companies or authorized agents. This system is running nonstop since 2004 without a single day interrupt or crash which is a remarkable achievement in context of a developing country like Bangladesh. Moreover, 4000/5000 job seeker registration done in every working day in 21 District Offices and around 3000-4000 clearance done in BMET head Office with departure checking in airports.
电子政务的最终目标是建立善治。善治的要素可确定如下:a.效率b.可靠性c.问责制d.可及性和透明度e.决策有远见。所有这些要素都可以通过适当实施电子政务来实现。孟加拉国政府已经实施了几个项目。在这里,我们讨论一个名为人力就业和培训局(BEMT)的政府办公室,他们非常有效地使用信息通信技术。自1976年以来,BMET一直在手工处理劳动力迁移。在移民过程中营造适宜的氛围和建立制度框架的措施已于2004年建立了计算机数据库网络。有意求职的人士可在网上登记他们的姓名及其他资料。从这个数据库中选择海外市场的候选产品。BMET还通过计算机网络从该数据库提供移民许可。它的能力和活动主要是继续为那些由私人公司或授权代理人提供海外就业机会的人签发移民许可。自2004年以来,该系统一直在不间断地运行,没有一天中断或崩溃,这对孟加拉国这样的发展中国家来说是一项了不起的成就。此外,在21个民政事务处,每个工作天完成4000至5000名求职者登记,在机场办理离境检查时,在BMET总部完成约3000至4000名求职者登记。
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引用次数: 1
Fully parallel associative memory with human memory type learning model 完全并行联想记忆与人类记忆型学习模式
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579361
M. Abedin, A. Ahmadi, T. Koide, H. Mattausch
In this paper, fully parallel associative memory architecture with learning model is proposed. It uses a mixed digital-analog associative memory for reference pattern recognition and a learning model based on a short and long-term memory similar to that in human brain. In addition a ranking mechanism is used to manage the transition of reference vectors between two memories and an optimization algorithm is used to adjust the reference vectors components as well as their distribution continuously. The main advantage of the proposed model is no need to pre-training phase as well as its hardware-friendly structure which makes it implementable by an efficient LSI architecture without requiring a large amount of resources. The system was implemented on an FPGA platform and tested with real data of handwritten and printed English characters and the classification results found satisfactory.
提出了一种带学习模型的全并行联想记忆体系结构。它使用一种混合的数字模拟联想记忆来识别参考模式,并采用一种类似于人类大脑的基于短期和长期记忆的学习模型。此外,采用排序机制来管理参考向量在两个存储器之间的转换,并采用优化算法来连续调整参考向量的组成及其分布。该模型的主要优点是不需要预训练阶段,并且它的硬件友好结构使得它可以在不需要大量资源的情况下通过高效的LSI架构实现。在FPGA平台上实现了该系统,并对手写和打印的英文字符进行了实际数据测试,结果令人满意。
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引用次数: 0
Modification of DSR and its implementation in Ad Hoc City DSR的修改及其在特设城市的实施
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579445
Tanvir Ahmed, Syed Nuruzzaman, Md. Nazimul Haque, M. Masum
Few real-world applications of mobile ad hoc networks have been developed or deployed outside the military environment, and no traces of actual node movement in a real ad hoc network have been available. In this paper we proposed a security scheme for an Ad Hoc City. We have designed an algorithm and corresponding packet structures to secure the pure ad hoc portion of the architecture. In order to achieve our goal, we have modified the Dynamic Source Routing Protocol (DSR) to adapt it in the environment under consideration. The Dynamic Source Routing protocol (DSR) is a simple and efficient routing protocol designed specifically for use in multi-hop wireless ad hoc networks of mobile nodes. DSR allows the network to be completely self-organizing and self-configuring, without the need for any existing network infrastructure or administration. The protocol is composed of the two mechanisms of Route Discovery and Route Maintenance. We have modified the Route Discovery and Route Maintenance phase in order to provide more security features.
在军事环境之外,已经开发或部署的移动自组织网络的实际应用很少,并且在实际的自组织网络中没有实际节点移动的痕迹。本文提出了一种针对Ad Hoc城市的安全方案。我们设计了一种算法和相应的数据包结构来保护该体系结构的纯自组织部分。为了实现我们的目标,我们修改了动态源路由协议(DSR)以使其适应所考虑的环境。动态源路由协议(DSR)是一种简单高效的路由协议,专门用于多跳移动节点无线自组织网络。DSR允许网络完全自组织和自配置,而不需要任何现有的网络基础设施或管理。该协议由路由发现和路由维护两种机制组成。为了提供更多的安全特性,我们修改了路由发现和路由维护阶段。
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引用次数: 5
Skills brokerage performance measurement through BSC 通过平衡记分卡对经纪公司绩效进行评估
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579411
F. Khoshalhan, A. Kaldi
The right combination of skills is essential for organizational performance and, in turn, competitive advantage. Organizations currently spend a lot of time and energy on acquiring such a right mix. The skills brokerage model operates as an intermediary, and aims to provide the required human resources, possessing specific skills, for businesses and entrepreneurs. The model uses its relationships with skills providers such as universities, and relates the skilled human resources to the employers; hence, links the offer and demand. Performance measurement of the skills brokerage business can be done by means of the balanced scorecard (BSC), resulting in a framework for measuring both financial and strategic business objectives.
正确的技能组合对于组织绩效和竞争优势至关重要。组织目前花费大量的时间和精力来获得这样一个正确的组合。技能经纪模式作为中介运作,旨在为企业和企业家提供所需的具有特定技能的人力资源。该模型利用其与大学等技能提供者的关系,并将熟练人力资源与雇主联系起来;因此,将报价和需求联系起来。技能经纪业务的绩效衡量可以通过平衡计分卡(BSC)来完成,从而形成一个衡量财务和战略业务目标的框架。
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引用次数: 2
Protein secondary structure prediction with high accuracy using Support Vector Machine 基于支持向量机的高精度蛋白质二级结构预测
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579365
M. Shoyaib, S. M. Baker, T. Jabid, F. Anwar, Haseena Khan
Mining bioinformatics data is an emerging area of research. Proteomics is one of the largest areas of focus in bioinformatics and data mining research. Protein structure prediction is one of the most crucial and decisive problem in all the areas of research. Protein secondary structure can be used for the determination of the tertiary structure via the fold recognition method. Hence, predicting the secondary structures from the proteinpsilas primary sequences has attracted the attention of many researchers. Experimental methods have proved to be complex and expensive. So to develop a simple and accurate method for structure prediction is of great importance. In this paper, a new method has been proposed based on the machine learning technique. The first step of this proposal is to find out frequent patterns of consecutive amino acids in a protein database. After this, a set of frequent words (feature set) is found. Then support vector machine (SVM) is used as a binary/tertiary classifier for the classification of protein secondary structure with these frequent words.
挖掘生物信息学数据是一个新兴的研究领域。蛋白质组学是生物信息学和数据挖掘研究中最大的焦点领域之一。蛋白质结构预测是所有研究领域中最关键、最具决定性的问题之一。蛋白质的二级结构可用于通过折叠识别方法确定三级结构。因此,利用蛋白质的初级序列预测蛋白质的二级结构已引起许多研究者的关注。实验方法已被证明是复杂和昂贵的。因此,开发一种简单、准确的结构预测方法具有重要的意义。本文提出了一种基于机器学习技术的新方法。该方案的第一步是找出蛋白质数据库中连续氨基酸的频繁模式。在此之后,找到一组频繁词(特征集)。然后利用支持向量机(SVM)作为二/三级分类器,利用这些频繁词对蛋白质二级结构进行分类。
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引用次数: 6
Adaptive beamforming of linear array antenna system with provision of sidelobe cancellation 提供旁瓣抵消的线阵天线系统的自适应波束形成
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579396
M. Khandaker, I. Islam, M. R. Amin
In case of single element antennas like Yagi-Uda, spiral, dipole, horn etc. have very little capability of variation antenna gain pattern. For better directivity, electronic tracking and reshaping of beam, array antenna is widely used in wireless network. Relative magnitude of feed currents, relative phases/separation between antenna elements, geometry of array are responsible for the shape of radiation pattern. In this paper linear array antenna with adaptive algorithm is used to achieve desired gain pattern at a desired angle of arrival (AOA). Linearly constraint minimum variance (LCMV) algorithm can be used quite comfortably for a desired gain incorporating Lagrange multiplier but side lobes can not be cancelled properly. This paper deals with combination of LCMV, sidelobe cancellation, LMS algorithm to achieve derided antenna gain pattern keeping sidelobe below a threshold level.
对于像八木田、螺旋、偶极子、喇叭等单元件天线,其天线增益方向图的变化能力很小。由于阵列天线具有良好的指向性、电子跟踪和波束整形能力,因此在无线网络中得到了广泛的应用。馈源电流的相对大小、天线单元之间的相对相位/间隔、阵列的几何形状决定了辐射方向图的形状。本文采用线性阵列天线自适应算法,在期望的到达角(AOA)下实现期望的增益方向图。线性约束最小方差(LCMV)算法可以很好地用于包含拉格朗日乘法器的期望增益,但不能适当地抵消旁瓣。本文将LCMV、旁瓣对消、LMS算法相结合,实现了将旁瓣保持在阈值以下的天线增益方向图。
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引用次数: 5
Guidelines for preparing standard software engineering curriculum: Bangladesh and global perspective 编写标准软件工程课程指南:孟加拉国和全球视角
Pub Date : 2007-12-01 DOI: 10.1109/ICCITECHN.2007.4579433
S. K. Dey, M. Abdus Sobhan
In recent years, tremendous technical changes have happened in software development, accompanied by increased complexity of the systems that are being developed. Businesses are now regularly deploying systems that employ and integrate a wide range of computing technologies and paradigms. Thus, it is inevitable for the academics to be prepared to educate their students to meet this unique challenge. However, the development of software engineering (SE) programs is a difficult & daunting task. In Bangladesh, curricula of undergraduate and graduate SE programs are not very old and maturing at a slower pace as compared to other curricula. There are problems for the development of such programs like: a) the SE profession in Bangladesh is immature; b) confusion about the difference between computer science (CS) and SE; c) lack of understanding and appreciation among CS faculty about the need for SE education; d) little available material on SE curriculum guideline; e) absence of local accreditation mechanism for SE programs, etc. In this paper, the authors studied the current status of SE curriculum in Bangladesh and abroad, and proposed guidelines for developing such curriculum adaptable by local academia and industry. The paper includes a curriculum design guideline, descriptions of probable knowledge components that can be used to design SE curricula, and a sample curriculum.
近年来,软件开发领域发生了巨大的技术变化,同时所开发的系统也变得越来越复杂。企业现在正在定期部署采用并集成各种计算技术和范例的系统。因此,学者们必须准备好教育他们的学生来迎接这一独特的挑战。然而,软件工程(SE)程序的开发是一项艰巨的任务。在孟加拉国,与其他课程相比,本科和研究生SE课程并不是很古老,成熟的速度也较慢。这些项目的发展存在以下问题:a)孟加拉国的SE专业还不成熟;b)混淆计算机科学(CS)和计算机科学(SE)之间的区别;c) CS教师对SE教育的需求缺乏理解和认识;d)关于SE课程指南的资料很少;e) SE项目缺乏地方认证机制等。本文通过对孟加拉国内外SE课程现状的研究,提出了适合当地学术界和产业界的SE课程开发指南。本文包括课程设计指南,可用于设计SE课程的可能知识组件的描述,以及示例课程。
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引用次数: 4
期刊
2007 10th international conference on computer and information technology
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