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Survey on Multi Agent Energy Efficient Clustering Algorithms in Wireless Sensor Networks 无线传感器网络中多智能体节能聚类算法研究
Pub Date : 2014-09-07 DOI: 10.18495/COMENGAPP.V3I3.92
Nazli B. Karimi
In the last few years, there are many applications for Wireless Sensor Networks (WSNs). One of the main drawbacks of these networks is the limited battery power of sensor nodes. There are many cases to reduce energy consumption in WSNs. One of them is clustering. Sensor nodes partitioned into the clusters so that one is chosen as Cluster Head (CH). Clustering and selection of the proper node as CH is very significant in reducing energy consumption and increasing network lifetime. In this paper, we have surveyed a multi agent clustering algorithms and compared on various parameters like cluster size, cluster count, clusters equality, parameters used in CHs selection, algorithm complexity, types of algorithm used in clustering, nodes location awareness, inter-cluster and intra-cluster topologies, nodes homogeneity and MAC layer communications.
在过去的几年里,无线传感器网络(WSNs)有很多应用。这些网络的主要缺点之一是传感器节点的电池电量有限。在无线传感器网络中,降低能耗的方法有很多。其中之一是聚类。将传感器节点划分到集群中,选择一个节点作为簇头(CH)。聚类和选择合适的节点作为CH对于降低网络能耗和提高网络寿命具有重要意义。在本文中,我们调查了一种多智能体聚类算法,并比较了各种参数,如聚类大小、聚类数量、聚类相等性、CHs选择参数、算法复杂性、聚类中使用的算法类型、节点位置感知、簇间和簇内拓扑、节点同质性和MAC层通信。
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引用次数: 1
Words Stemming Based on Structural and Semantic Similarity 基于结构和语义相似度的词干提取
Pub Date : 2014-07-16 DOI: 10.18495/COMENGAPP.V3I2.57
Mohammad Hassan Dianati, M. Sadreddini, A. Rasekh, S. M. Fakhrahmad, H. Taghi-Zadeh
Words  stemming  is  one  of  the  important  issues  in  the field  of  natural  language processing  and  information retrieval.  There  are  different  methods  for stemming which are mostly language-dependent. Therefore, these  stemmers are only applicable  to  particular  languages.  Because  of the importance  of  this issue,  in  this paper, the proposed method for stemming is aimed to be language-independent. In the  proposed  stemmer,  a  bilingual  dictionary  is  used and  all  of  the  words  in  the dictionary are firstly clustered. The words’ clustering is based on their structural and semantic similarity. Finally, finding the stem of new coming words is performed by making use of the previously formatted clusters. To evaluate the proposed scheme, words  stemming is  done on both  Persian  and  English  languages.  The encouraging results  indicate  the  good  performance  of  the proposed  method  compared  with  its counterparts.
词的词干提取是自然语言处理和信息检索领域的重要问题之一。词干提取有不同的方法,大多依赖于语言。因此,这些词干只适用于特定的语言。鉴于这一问题的重要性,本文提出的词干提取方法旨在实现与语言无关的词干提取方法。在该方法中,首先使用双语词典对词典中的所有单词进行聚类。词的聚类是基于它们的结构和语义相似性。最后,通过使用先前格式化的聚类来查找新单词的词干。为了评估所提出的方案,对波斯语和英语进行了单词词干提取。结果表明,与同类方法相比,该方法具有良好的性能。
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引用次数: 7
Improve the Performance of Data Grids by Cost-Based Job Scheduling Strategy 基于成本的作业调度策略提高数据网格的性能
Pub Date : 2014-07-16 DOI: 10.18495/COMENGAPP.V3I2.52
N. Mansouri
Grid environments have gain tremendous importance in recent years since application requirements increased drastically. The heterogeneity and geographic dispersion of grid resources and applications places some complex problems such as job scheduling. Most existing scheduling strategies in Grids only focus on one kind of Grid jobs which can be data-intensive or computation-intensive. However, only considering one kind of jobs in scheduling does not result in suitable scheduling in the viewpoint of all system, and sometimes causes wasting of resources on the other side. To address the challenge of simultaneously considering both kinds of jobs, a new Cost-Based Job Scheduling (CJS) strategy is proposed in this paper. At one hand, CJS algorithm considers both data and computational resource availability of the network, and on the other hand, considering the corresponding requirements of each job, it determines a value called W to the job. Using the W value, the importance of two aspects (being data or computation intensive) for each job is determined, and then the job is assigned to the available resources. The simulation results with OptorSim show that CJS outperforms comparing to the existing algorithms mentioned in literature as number of jobs increases.
近年来,由于应用程序需求急剧增加,网格环境变得非常重要。网格资源和应用程序的异构性和地理分散性带来了作业调度等复杂问题。大多数网格调度策略只关注一类网格作业,这些作业可能是数据密集型的,也可能是计算密集型的。然而,在调度中只考虑一类作业并不能从整个系统的角度得到合适的调度结果,有时还会造成另一方资源的浪费。为了解决同时考虑两种作业的挑战,本文提出了一种新的基于成本的作业调度策略。CJS算法一方面考虑网络数据和计算资源的可用性,另一方面考虑每个作业对应的需求,为作业确定一个W的值。使用W值,确定每个作业的两个方面(数据密集型或计算密集型)的重要性,然后将该作业分配给可用资源。OptorSim的仿真结果表明,随着作业数量的增加,CJS的性能优于文献中提到的现有算法。
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引用次数: 2
Predicting Academic Performance with Applying Data Mining Techniques (Generalizing the results of two Different Case Studies) 应用数据挖掘技术预测学习成绩(概括两个不同案例研究的结果)
Pub Date : 2014-06-30 DOI: 10.18495/COMENGAPP.V3I2.81
Rozita Jamili Oskouei, M. Askari
Several research works are attempted to predict students academic performance and assess  the  evaluating students knowledge  or  detecting  students’  weakness and probability of failure in final semester examinations. However, several factors affect the performance of students in different countries or even in different states of one country. Therefore, understanding these factors and analyzing the effects of each one of those factors in each country, is necessary for improving instructors’ decisions in selecting the best teaching method for helping weak students or increasing performance  of  other  students. This study is motivated  to  study  the  students’ academic performance in high  school  and  bachelor  degree  studies  in  Iran and comparing these analysis results with the similar study’s results in India.
一些研究工作试图预测学生的学习成绩和评估评估学生的知识或发现学生在期末考试中的弱点和不及格的概率。然而,在不同的国家,甚至在一个国家的不同州,有几个因素会影响学生的表现。因此,了解这些因素并分析每个因素在每个国家的影响,对于改善教师在选择最佳教学方法以帮助弱势学生或提高其他学生的表现时的决策是必要的。本研究的动机是研究伊朗学生在高中和本科阶段的学习成绩,并将这些分析结果与印度类似研究的结果进行比较。
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引用次数: 21
Cost Modeling and Risk and Benefit Modeling Approach as a Tools For Decision Making in Adoption Cloud Computing as IT Strategic Business 采用云计算作为IT战略业务的决策工具的成本建模和风险效益建模方法
Pub Date : 2014-06-29 DOI: 10.18495/COMENGAPP.V3I2.62
Rian Rahmanda Putra, Wanda Kinasih, D. I. Sensuse
Cloud computing is an innovation that allows the use of IT as a utility based on-demand. Since cloud computing is a new technology, its led to a variety of risks that required an assessment model to assess the organization's readiness to adopt cloud computing. Moreover, by using cloud computing services means organizations or outsourcing involves a third party. Before adopting cloud computing technology, organizations need to consider some of the effects that arise as a result of cloud computing, namely in terms of costs, risks and benefits. To assist organizations to consider the migration of existing IT systems to the cloud, it can be used the cost approach valuation models and risk and benefit. This paper discusses two models of cost-based assessment of risk and benefit modeling and modeling that can be used as a tool to assist organizations in making decisions related to the migration of existing IT systems to the cloud.
云计算是一种创新,它允许将IT作为一种基于需求的实用程序来使用。由于云计算是一项新技术,它带来了各种风险,需要一个评估模型来评估组织是否准备好采用云计算。此外,通过使用云计算服务意味着组织或外包涉及第三方。在采用云计算技术之前,组织需要考虑云计算带来的一些影响,即成本、风险和收益方面的影响。为了帮助组织考虑将现有IT系统迁移到云,可以使用成本方法评估模型和风险与收益。本文讨论了两种基于成本的风险和收益评估模型,建模和建模可以作为工具来帮助组织制定与将现有IT系统迁移到云相关的决策。
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引用次数: 2
W_SR: A QoS Based Ranking Approach for Cloud Computing Service 基于QoS的云计算服务排序方法
Pub Date : 2014-06-29 DOI: 10.18495/COMENGAPP.V3I2.76
A. Jahani, L. M. Khanli, S. Razavi
Cloud computing is a kind of computing model that promise accessing to information resources in request time and subscription basis. In this environment, there are different type of user’s application with different requirements. In addition, there are different cloud Service providers which present spate services with various qualitative traits. Therefore determining the best cloud computing service for users with specific applications is a serious problem. Service ranking system compares the different services based on quality of services (QoS), in order to select the most appropriate service. In this paper, we propose a W_SR (Weight Service Rank) approach for cloud service ranking that uses from QoS features. Comprehensive experiments are conducted employing real-world QoS dataset, including more than 2500 web services over the world. The experimental results show that execution time of our approach is less than other approaches and it is more flexible and scalable than the others with increase in services or users.
云计算是一种以请求时间和订阅为基础的信息资源访问的计算模型。在这种环境中,存在不同类型的用户应用程序,具有不同的需求。此外,还有不同的云服务提供商,它们提供的大量服务具有不同的定性特征。因此,为具有特定应用程序的用户确定最佳云计算服务是一个严重的问题。服务排名系统根据服务质量(QoS)对不同的服务进行比较,从而选择最合适的服务。在本文中,我们提出了一种W_SR(加权服务排名)方法,用于使用QoS特征进行云服务排名。采用世界上2500多个web服务的真实QoS数据集进行了全面的实验。实验结果表明,随着服务或用户的增加,该方法的执行时间比其他方法短,并且具有更大的灵活性和可扩展性。
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引用次数: 10
A new DWT-SVD based robust watermarking scheme for real property rights 一种新的基于DWT-SVD的不动产产权鲁棒水印方案
Pub Date : 2014-06-29 DOI: 10.18495/COMENGAPP.V3I2.73
sedigeh razavi babakalak, M. Balafar, A. Farzan
In this paper, a new robust digital image watermarking algorithm which was based on singular value decomposition (SVD) and discrete wavelet transform (DWT) was proposed and simulated for protecting real property rights. A gray scale logo image, rather than a randomly generated Gaussian noise type watermark, was used as a watermark. Its embedding algorithm hid a watermark LL sub-band blocks in the low–low (LL) and high-high (HH) sub-bands of a target non-overlapping block of the host image by modifying singular values on SVD version of these blocks. A semi-blind watermark extraction was designed to estimate the original coefficients. Experimental results showed that the proposed scheme made significant improvements in terms of both transparency and robustness and was superior to the existing methods which were considered in this paper.
提出了一种基于奇异值分解(SVD)和离散小波变换(DWT)的鲁棒数字图像水印算法,并进行了仿真。采用灰度标志图像作为水印,而不是随机生成高斯噪声类型的水印。其嵌入算法通过修改目标图像中不重叠块的奇异值,将水印LL子带块隐藏在目标图像的low-low (LL)和high-high (HH)子带中。设计了一种半盲水印提取方法来估计原始系数。实验结果表明,该方案在透明性和鲁棒性方面都有显著改善,优于本文所考虑的现有方法。
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引用次数: 1
NFC based inventory control system for secure and efficient communication 基于NFC的库存控制系统,实现安全高效的通信
Pub Date : 2014-02-06 DOI: 10.18495/COMENGAPP.V3I1.50
R. Iqbal, Awais Ahmad, A. Gilani
This paper brings up this idea of using Near Field Communication (NFC) for inventory control system instead of using traditional barcodes. NFC because of its high security, ease of use and efficiency can be very suitable for systems like inventory control. In traditional inventory control systems, each product has a barcode pasted on it, which is vulnerable to attacks as barcodes are open and have no security. Furthermore, barcodes are prone to damages and can be unreliable when pasted on different types of products e.g. hot and frozen products, circular shaped products and irregular shaped products like clothes etc. NFC on the other hand is very efficient, secure and reliable when it comes to short-range wireless communication. In this paper we will present our prototype for the inventory control system of an electronic store in which each product has a passive NFC tag pasted to it. When a customer buys a product the receipt of the product is generated using NFC between the NFC passive tag on the product and NFC enabled device (e.g. smart phone or reader) at the cash counter.
本文提出了将近场通信技术(NFC)应用于库存控制系统中,以取代传统的条形码。NFC由于其高安全性、易用性和高效性,可以非常适用于库存控制等系统。在传统的库存控制系统中,每个产品都有一个条形码,条形码是开放的,没有安全性,容易受到攻击。此外,当条形码贴在不同类型的产品上时,如热产品和冷冻产品,圆形产品和不规则形状的产品,如衣服等,条形码容易损坏,可能不可靠。另一方面,当涉及到短距离无线通信时,NFC非常高效、安全、可靠。在本文中,我们将展示我们的电子商店库存控制系统的原型,其中每个产品都粘贴了一个无源NFC标签。当客户购买产品时,产品上的NFC被动标签和收银台的NFC设备(如智能手机或阅读器)之间使用NFC技术生成产品收据。
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引用次数: 10
A Hybrid Approach for Scheduling based on Multi-criteria Decision Method in Data Grid 数据网格中基于多准则决策方法的混合调度方法
Pub Date : 2014-02-06 DOI: 10.18495/COMENGAPP.V3I1.44
N. Mansouri
Grid computing environments have emerged following the demand of scientists to have a very high computing power and storage capacity. One among the challenges imposed in the use of these environments is the performance problem. To improve performance, scheduling technique is used. Most existing scheduling strategies in Grids only focus on one kind of Grid jobs which can be data-intensive or computation-intensive. However, only considering one kind of jobs in scheduling does not result in suitable scheduling in the viewpoint of all system, and sometimes causes wasting of resources on the other side. To address the challenge of simultaneously considering both kinds of jobs, a new Hybrid Job Scheduling (HJS) strategy is proposed in this paper. At one hand, HJS algorithm considers both data and computational resource availability of the network, and on the other hand, considering the corresponding requirements of each job, it determines a value called W to the job. Using the W value, the importance of two aspects (being data or computation intensive) for each job is determined, and then the job is assigned to the available resources. The simulation results with OptorSim show that HJS outperforms comparing to the existing algorithms mentioned in literature as number of jobs increases.
网格计算环境是随着科学家对计算能力和存储容量的要求而出现的。在使用这些环境时面临的挑战之一是性能问题。为了提高性能,使用了调度技术。大多数网格调度策略只关注一类网格作业,这些作业可能是数据密集型的,也可能是计算密集型的。然而,在调度中只考虑一类作业并不能从整个系统的角度得到合适的调度结果,有时还会造成另一方资源的浪费。为了解决同时考虑两种作业的挑战,本文提出了一种新的混合作业调度策略。HJS算法一方面考虑网络数据和计算资源的可用性,另一方面考虑每个作业对应的需求,为作业确定一个叫W的值。使用W值,确定每个作业的两个方面(数据密集型或计算密集型)的重要性,然后将该作业分配给可用资源。OptorSim的仿真结果表明,随着作业数量的增加,HJS的性能优于文献中提到的现有算法。
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引用次数: 2
Classification of Smart Card Operating Systems 智能卡操作系统的分类
Pub Date : 2014-02-06 DOI: 10.18495/COMENGAPP.V3I1.49
R. Asgari, Reza Ebrahimi Atani
Today, smart cards are widely used in variety of applications of human life.The nature of these cards depends on theirs operating system, in other words the operating system determines that card can be used in what field. Hardware development on the one hand and increasing use of smart cards on the other, have led to that the operating systems have progressed dramatically.Moving from special-purpose operating systems with single application into multi-purpose operating systems with open architecture, is proof of claim.Increase the number of operating systems and variety of their applications, caused that the need to categorize and classify operating systems be felt more than ever.Smart card operating systems can be categorized based on different parameters such as file management, applications management, and historical generations. In this paper we will discussion about smart card operating systems and their classification based on these parameters.
今天,智能卡被广泛应用于人类生活的各种应用中。这些卡的性质取决于它们的操作系统,换句话说,操作系统决定了卡可以用在什么领域。一方面是硬件的发展,另一方面是智能卡的日益普及,这导致了操作系统的巨大进步。从具有单一应用程序的专用操作系统转变为具有开放体系结构的多用途操作系统,就是证明。操作系统的数量和应用程序种类的增加,使得对操作系统进行分类和分类的需求比以往任何时候都更加强烈。智能卡操作系统可以根据文件管理、应用程序管理和历史世代等不同的参数进行分类。在本文中,我们将讨论智能卡操作系统及其基于这些参数的分类。
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引用次数: 2
期刊
Computer Engineering and Applications
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