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Mapping Computer Science research in Bangladesh 孟加拉国的计算机科学研究
S. Banshal, Khushboo Singhal, A. Uddin, V. Singh
This paper represents a scientometric-based analysis of Computer Science research in Bangladesh. The paper reports our analytical results from Scopus data for the last 25 years. The results present detailed statistics about the research output, the growth of research publications, citation-based impact analysis and collaboration patterns. It also tries to identify the top institutions and authors and preferred publication sources. We also did a text-based research theme analysis for the 25 year period and present the thematic research areas and their trends during the period.
这篇论文代表了对孟加拉国计算机科学研究基于科学计量学的分析。这篇论文报告了我们对过去25年Scopus数据的分析结果。结果提供了关于研究产出、研究出版物增长、基于引用的影响分析和合作模式的详细统计数据。它还试图确定顶级机构和作者以及首选的出版来源。并对25年的研究进行了文本化的主题分析,提出了25年的主题研究领域及其发展趋势。
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引用次数: 7
GraATP: A graph theoretic approach for Automated Theorem Proving in plane geometry 平面几何中自动定理证明的图论方法
M. Mahmud, Swakkhar Shatabda, M. N. Huda
Automated Theorem Proving (ATP) is an established branch of Artificial Intelligence. The purpose of ATP is to design a system which can automatically figure out an algorithm either to prove or disprove a mathematical claim, on the basis of a set of given premises, using a set of fundamental postulates and following the method of logical inference. In this paper, we propose GraATP, a generalized framework for automated theorem proving in plane geometry. Our proposed method translates the geometric entities into nodes of a graph and the relations between them as edges of that graph. The automated system searches for different ways to reach the conclusion for a claim via graph traversal by which the validity of the geometric theorem is examined.
自动定理证明(ATP)是人工智能的一个成熟分支。ATP的目的是设计一个系统,该系统可以根据一组给定的前提,使用一组基本公设,遵循逻辑推理的方法,自动计算出证明或证伪一个数学命题的算法。本文提出了平面几何自动定理证明的广义框架GraATP。我们提出的方法将几何实体转换为图的节点,并将它们之间的关系转换为图的边。自动系统通过图遍历来寻找不同的方法来得出结论,通过图遍历来检验几何定理的有效性。
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引用次数: 1
Feature selection and intrusion classification in NSL-KDD cup 99 dataset employing SVMs 基于支持向量机的NSL-KDD cup 99数据集特征选择与入侵分类
Muhammad Shakil Pervez, Dewan Md. Farid
Intrusion is the violation of information security policy by malicious activities. Intrusion detection (ID) is a series of actions for detecting and recognising suspicious actions that make the expedient acceptance of standards of confidentiality, quality, consistency, and availability of a computer based network system. In this paper, we present a new approach consists with merging of feature selection and classification for multiple class NSL-KDD cup 99 intrusion detection dataset employing support vector machine (SVM). The objective is to improve the competence of intrusion classification with a significantly reduced set of input features from the training data. In supervised learning, feature selection is the process of selecting the important input training features and removing the irrelevant input training features, with the objective of obtaining a feature subset that produces higher classification accuracy. In the experiment, we have applied SVM classifier on several input feature subsets of training dataset of NSL-KDD cup 99 dataset. The experimental results obtained showed the proposed method successfully bring 91% classification accuracy using only three features and 99% classification accuracy using 36 features, while all 41 training features achieved 99% classification accuracy.
入侵是指恶意活动对信息安全策略的违反。入侵检测(ID)是检测和识别可疑行为的一系列操作,这些行为使基于计算机的网络系统的机密性、质量、一致性和可用性符合标准。本文提出了一种基于支持向量机(SVM)的多类NSL-KDD cup 99入侵检测数据集特征选择与分类合并的方法。目标是通过显著减少训练数据的输入特征集来提高入侵分类的能力。在监督学习中,特征选择是选择重要的输入训练特征,去除不相关的输入训练特征的过程,目的是获得一个分类精度更高的特征子集。在实验中,我们将SVM分类器应用于NSL-KDD cup 99数据集训练数据集的多个输入特征子集。实验结果表明,该方法仅使用3个特征即可实现91%的分类准确率,使用36个特征即可实现99%的分类准确率,41个训练特征均达到99%的分类准确率。
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引用次数: 158
A case-based framework for self-healing paralysed components in Distributed Software applications 分布式软件应用程序中用于自修复瘫痪组件的基于案例的框架
Tanim Hasan, A. Imran, K. Sakib
Self-healing is the ability of the software to detect faulty modules at execution time and replace or recover those without affecting other components. This paper proposes a framework for self-healing of Distributed Software System (DSS). Monitoring component is used to detect and record failures of DSS. Healing system will replace the paralysed components with healthy ones which will be initiated from the information given by Monitoring system to the proposed Reviver process. A failed case table is required to match the real life failures with it for identification of the solution. Distance between the failed case table and the recorded failures need to be calculated using exclusive OR since the solution closest to the fail can then be determined. Afterwards, the minimum distance between those is used to resolve the failure. This recovery is achieved through replacement of the faulty modules with redundant components in the DSS. Performance evaluation shows a desirable time consumption of less than the standard 0.7 seconds for component replacement in all the experimental iterations.
自我修复是软件在执行时检测故障模块并在不影响其他组件的情况下替换或恢复这些模块的能力。提出了一种分布式软件系统(DSS)的自修复框架。监控组件用于检测和记录DSS的故障。康复系统将用健康的组件取代瘫痪的组件,这些组件将根据监测系统提供的信息启动到拟议的恢复过程。需要一个失败案例表来匹配现实生活中的失败,以便识别解决方案。失败案例表和记录的失败之间的距离需要使用异或计算,因为可以确定最接近失败的解决方案。然后,使用它们之间的最小距离来解决故障。这种恢复是通过用DSS中的冗余组件替换故障模块来实现的。性能评估表明,在所有实验迭代中,元件更换的理想时间消耗小于标准的0.7秒。
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引用次数: 3
Fiber to the Antenna: Solution in integrated optical and wireless networks 光纤到天线:集成光无线网络的解决方案
Fahimul Haque, Sheri Jahan Chowdhury, Sheikh Shazeed Ahsan, Zamiur Rahman, M. Z. Ali
Fiber to the Antenna (FTTA) solution in integrated optical and wireless networks brings significant benefits offering speed and mobility in communications. However, there are some unavoidable issues that field engineers constantly experience while implementing physical components of FTTA systems at cell sites. In this paper, we study FTTA architecture, physical components, benefits and its implementation issues very closely. The implementation issues with power, environmental protection, surge protection etc. are analyzed thoroughly with currently available solutions in the market. Some constructive ideas on resolutions to those issues are also analyzed. Our analysis in this paper can be useful for planning a better implementation process without having major issues in the near future. This paper is a result of an undergraduate senior research project.
光纤到天线(FTTA)解决方案在集成光和无线网络中带来了显著的优势,提供了通信的速度和移动性。然而,现场工程师在蜂窝站点实施FTTA系统的物理组件时经常遇到一些不可避免的问题。本文对FTTA的体系结构、物理组成、效益及其实现问题进行了深入的研究。对电力、环保、电涌保护等方面的实施问题进行了深入分析,并结合目前市场上可用的解决方案。并对解决这些问题的一些建设性意见进行了分析。我们在本文中的分析可以用于规划更好的实现过程,而不会在不久的将来出现重大问题。本论文是一项本科高年级研究项目的成果。
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引用次数: 1
In silico analysis of salt responsive survival associated motifs in rice promoter 水稻启动子盐响应性存活相关基序的硅分析
Rubaida Easmin, Shamira Tabrejee, Lamisha Rowshon, Alim Ul Gias, Md Miraj Kobad Chowdhuryy, S. Khaled
In stressed condition, several specific transcription factors bind to corresponding regulatory elements or motifs resulting in the expression of appropriate genes, which helps the plant to survive in that condition. Till now, several motifs have been identified though computationally validating those motifs is a major research concern. Considering this, we present an in silico method to validate the presence of such motifs in the promoter of rice genes, which could be associated with the survival of rice in saline environments. For this, we present a statistical approach that consists of three consecutive steps: finding overrepresented oligomers in sensitive variety, identifying the potential motif from the overrepresented oligomers and validating oligomers in the promoters of up regulated genes of tolerant variety using the motif of the sensitive one. In our experiment, we have initially identified 5 potential pentamers and then the most represented one (ACGAC) was used to validate previously described motifs overrepresented in promoters of genes in different abiotic stress tolerant rice to justify their association with survival. Ultimately, our method has shown promises to better identify motifs in promoters of genes up regulated during salt stress according to their likelihood to be associated with the plant survival.
在逆境条件下,几种特定的转录因子与相应的调控元件或基序结合,导致相应基因的表达,从而帮助植物在逆境条件下生存。到目前为止,已经确定了几个基序,但计算验证这些基序是一个主要的研究问题。考虑到这一点,我们提出了一种计算机方法来验证水稻基因启动子中存在这些基序,这些基序可能与水稻在盐水环境中的存活有关。为此,我们提出了一种由三个连续步骤组成的统计方法:在敏感品种中发现过度代表的低聚物,从过度代表的低聚物中识别潜在的基序,并使用敏感品种的基序验证耐受性品种上调基因启动子中的低聚物。在我们的实验中,我们最初确定了5种潜在的五聚体,然后使用最具代表性的一种(ACGAC)来验证先前描述的在不同非生物抗逆性水稻基因启动子中过度代表的基序,以证明它们与生存的关联。最终,我们的方法已经显示出希望,可以根据与植物存活相关的可能性,更好地识别盐胁迫下上调的基因启动子中的基序。
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引用次数: 0
A fuzzy based recommendation system with collaborative filtering 基于协同过滤的模糊推荐系统
Md Mahfuzur Rahman Siddiquee, N. Haider, R. Rahman
Recommendation of items is a popular utility in today's social networks and ecommerce sites. The task becomes more critical when high level of accuracy is required. This paper analyzes the improvement in recommendation of movies using Fuzzy logic. The user's choice similarity and acceptance rate is calculated with different similarity measurement approaches, e.g., Euclidean Distance, Manhattan Distance, Pearson Coefficient and Cosine Similarity. To calculate user's choice similarity we take the K most similar users and find the average rating of the target movie given by the similar users. To find acceptance rate, we need to find similar movies to the target movie. To do that, we consider the movies that have the highest number of matching genres against the genres of target movie. Then we consider K most similar movies and calculate the average rating of those similar movies given by the target user. We calculate expected rating using those two parameters and then decision making is made using Mamdani inference systems. We also report performance results of various models based on different similarity measurement techniques, and membership functions with type and number variations.
在当今的社交网络和电子商务网站中,商品推荐是一种流行的工具。当要求高精度时,任务变得更加关键。本文分析了模糊逻辑对电影推荐的改进。用户的选择相似度和接受率通过不同的相似度度量方法计算,如欧几里得距离、曼哈顿距离、皮尔逊系数和余弦相似度。为了计算用户的选择相似度,我们取K个最相似的用户,并找到相似用户对目标电影的平均评分。为了找到接受率,我们需要找到与目标电影相似的电影。为了做到这一点,我们考虑具有最多匹配类型的电影与目标电影的类型。然后我们考虑K部最相似的电影,并计算目标用户给出的这些相似电影的平均评分。我们使用这两个参数计算期望评级,然后使用Mamdani推理系统进行决策。我们还报告了基于不同相似性度量技术的各种模型的性能结果,以及具有类型和数量变化的隶属函数。
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引用次数: 5
Compact triple C shaped microstrip patch antenna for WLAN, WiMAX & Wi-Fi application at 2.5 GHz 紧凑的三C形微带贴片天线,适用于2.5 GHz的WLAN, WiMAX和Wi-Fi应用
D. Dutta, A. Hira, Fahim Asjad, T. Haider
In the rapid progress of commercial communication applications, the development of compact antenna has an important role. This paper presents the analysis on the performance of single band compact triple C shaped microstrip patch antenna for WLAN, WiMAX and Wi-Fi applications with center frequency at 2.5GHz. The microstrip antenna has a planar geometry and consists of a ground plane, a substrate, a compact patch as radiator. Different specifications of the proposed antenna are measured through computer simulation in free space. The antenna has an impedance bandwidth of 2500 MHz (2487MHz to 2512 MHz). The proposed antenna provides excellent SWR of 1.04 and return loss -32.80 dB while excited by a 50 O microstrip feed line. All simulation results are performed using the CST Microwave Studio.
在快速发展的商业通信应用中,紧凑型天线的发展有着重要的作用。本文对中心频率为2.5GHz的WLAN、WiMAX和Wi-Fi应用的单频段紧凑型三C型微带贴片天线的性能进行了分析。微带天线具有平面几何结构,由接地面、衬底、作为辐射体的紧凑贴片组成。在自由空间中通过计算机仿真测量了所提出天线的不同规格。天线阻抗带宽为2500mhz (2487MHz ~ 2512mhz)。在50 O微带馈线的激励下,该天线的信噪比为1.04,回波损耗为-32.80 dB。所有的模拟结果都是使用CST微波工作室进行的。
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引用次数: 2
Investigation on EBG structures: A critical analysis to optimize the performance of asymmetric couple-line bandpass filter EBG结构的研究:非对称双线带通滤波器性能优化的关键分析
S. Parvez, N. Sakib, M. N. Mollah
EBGSs, Electromagnetic Band Gap Structures, have been developed into the most prominent framework by virtue of their superior efficacy, less intricacy in fabrication, and unified integration with the monolithic microwave integrated circuits (MMICs). In this letter, a certain number of advanced designs of EBGS are introduced and characterized with some rigorous parametric studies. This epistle regards the planar-EBG frameworks in the fashion of conventional uniform circular, square, and annular ring patterns. By the same token, optimum Filling Factor has been investigated by exclusively analysing the traditional frequency response of band pass filter from three imperative aspects such as: initial stop band analysis, pass band analysis, and conclusive stop band analysis. In like manner, the parametric comparison has been demonstrated in view of the initial frequency response, selectivity, 3dB cut-off frequency, 3dB pass bandwidth, insertion loss at 2nd harmonics, and the insertion loss at 3rd harmonics to figure out the optimum filling factor for certain planar-EBG patterns.
电磁带隙结构(EBGSs)由于其优越的效能、较低的制造复杂性以及与单片微波集成电路(mmic)的统一集成而成为最突出的框架。在这封信中,介绍了一些先进的EBGS设计,并进行了一些严格的参数研究。这封信考虑平面- ebg框架在传统的统一的圆形,方形和环形模式的时尚。同样,从初始阻带分析、通带分析和最终阻带分析三个重要方面对传统带通滤波器的频率响应进行了专门分析,探讨了最佳填充系数。同样,从初始频率响应、选择性、3dB截止频率、3dB通带宽、2次谐波插入损耗和3次谐波插入损耗等方面进行了参数比较,得出了某些平面- ebg图形的最佳填充因子。
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引用次数: 10
Image processing based Feature extraction of Bangladeshi banknotes 基于图像处理的孟加拉钞票特征提取
Z. Ahmed, S. Yasmin, M. Islam, R. Ahmed
Counterfeit currency is a burning question throughout the world. The counterfeiters are becoming harder to track down because of their rapid adoption of and adaptation with highly advanced technology. One of the most effective methods to stop counterfeiting can be the widespread use of counterfeit detection tools/software that are easily available and are efficient in terms of cost, reliability and accuracy. This paper presents a core software system to build a robust automated counterfeit currency detection tool for Bangladeshi bank notes. The software detects fake currency by extracting existing features of banknotes such as micro-printing, optically variable ink (OVI), water-mark, iridescent ink, security thread and ultraviolet lines using OCR (Optical Character recognition), Contour Analysis, Face Recognition, Speeded UP Robust Features (SURF) and Canny Edge & Hough transformation algorithm of OpenCV. The success rate of this software can be measured in terms of accuracy and speed. This paper also focuses on the pros and cons of implementation details that may degrade the performance of image processing based paper currency authentication systems.
假币是全世界亟待解决的问题。造假者正变得越来越难以追查,因为他们迅速采用并适应了高度先进的技术。制止假冒的最有效方法之一可能是广泛使用容易获得的、在成本、可靠性和准确性方面效率高的假冒检测工具/软件。本文提出了一个核心的软件系统,以建立一个强大的自动假币检测工具孟加拉钞票。该软件利用OCR(光学字符识别)、轮廓分析、人脸识别、加速鲁棒特征(SURF)和OpenCV的Canny Edge & Hough变换算法,提取纸币的现有特征,如微印刷、光学可变墨水(OVI)、水印、彩虹墨水、安全线和紫外线线,从而检测假币。该软件的成功率可以从准确性和速度两方面来衡量。本文还重点讨论了可能降低基于图像处理的纸币认证系统性能的实现细节的优缺点。
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引用次数: 20
期刊
The 8th International Conference on Software, Knowledge, Information Management and Applications (SKIMA 2014)
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