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2017 International Conference on Electrical, Computer and Communication Engineering (ECCE)最新文献

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Mobility effect on the downlink performance of spatial multiplexing techniques under different scheduling algorithms in heterogeneous network 异构网络中不同调度算法下空间复用技术下行性能的移动性影响
A. Shams, Syed Rafiee Abied, M. Asaduzzaman, Md. Farhad Hossain
LIE addresses the escalating demand of data rates by introducing several multiple-input and multiple-output (MIMO) transmission modes. One of the potential MIMO technique is to send independent data streams over multiple antennas. This is known as spatial multiplexing. The simplest form of spatial multiplexing is open-loop spatial multiplexing (OLSM). The performance of OLSM can be improved further by using an extra feedback information sent back by the user equipment (UE) to the base station (BS). This is termed as closed loop spatial multiplexing (CLSM). Data is transmitted in the form of packets called resource blocks (RBs) and the distribution of RBs among active UEs is determined by the scheduler present at the BS. Scheduler performance ranges from optimizing the UE fairness to maximizing the UE throughput and can have a significant impact on the overall system performance. A prominent constraint that degrades the MIMO performance is the UE mobility. In this paper, we have analyzed various LTE downlink performance parameters between OLSM and CLSM under different scheduler algorithms to conclude which spatial multiplexing and scheduler combination is best suited for mobile users in a heterogeneous network (HetNet).
LIE通过引入多种多输入多输出(MIMO)传输模式来解决不断升级的数据速率需求。潜在的MIMO技术之一是在多个天线上发送独立的数据流。这被称为空间多路复用。最简单的空间复用形式是开环空间复用(OLSM)。通过使用用户设备(UE)向基站(BS)发送的额外反馈信息,可以进一步提高OLSM的性能。这被称为闭环空间复用(CLSM)。数据以称为资源块(resource block, RBs)的数据包的形式传输,活动ue之间的资源块分布由BS上的调度器决定。调度器的性能范围从优化UE公平性到最大化UE吞吐量,并且可能对整个系统性能产生重大影响。降低MIMO性能的一个突出约束是终端移动性。在本文中,我们分析了不同调度器算法下OLSM和CLSM之间的各种LTE下行链路性能参数,以得出哪种空间复用和调度器组合最适合异构网络(HetNet)中的移动用户。
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引用次数: 9
RPPMD (Randomly projected possible motif discovery): An efficient bucketing method for finding DNA planted Motif RPPMD(随机投影可能基序发现):一种高效的寻找DNA植入基序的方法
Faisal Bin Ashraf, Ali Imam Abir, Md Sirajus Salekin, M. Mottalib
DNA contains the information of structure and function of different molecules of any living being. Short repeating patterns in a DNA sequence, called Motifs, are useful to understand and analyze this information. Recent advancements in gene expression analysis already prompt the scientists to introduce a number of motif finding algorithms. Among different motif search problems, one of them is Planted Motif Search (PMS). In this paper, we have proposed an approximate algorithm for Planted Motif Search which at first generates all possible motif set and use a bucketing concept to find out the proper motifs from the whole dataset. Two benchmark datasets of DNA sequences are used to evaluate the performance of the proposed method and its comparative analysis with other approaches. Experimental results demonstrate that proposed bucketing approach is more robust than the other approximate algorithms providing more amounts of motifs within less amount of time. Most of the time, above 80% of the possible motifs of the given input set are found within a reasonable time.
DNA包含了任何生物不同分子的结构和功能信息。DNA序列中的短重复模式,称为基序,对理解和分析这些信息很有用。基因表达分析的最新进展已经促使科学家引入了许多基序查找算法。在不同的基序搜索问题中,种植基序搜索(PMS)是其中的一种。本文提出了一种近似的植入式Motif搜索算法,该算法首先生成所有可能的Motif集,然后使用桶形概念从整个数据集中找出合适的Motif。利用两个DNA序列的基准数据集来评估该方法的性能,并与其他方法进行比较分析。实验结果表明,该方法比其他近似算法具有更强的鲁棒性,可以在更短的时间内提供更多数量的基序。大多数情况下,在合理的时间内,给定输入集的80%以上的可能母题被找到。
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引用次数: 5
Structure preserving model order reduction using the projection onto the dominant eigen-space of the Gramian (PDEG) 利用Gramian (PDEG)的显性特征空间投影的保结构模型降阶
Mohammad Monir Uddin
Recently, second-order-to-second-order structure preserving model order reduction (MOR) has received a lot of attention. One of the most prominent techniques of such MOR is balanced truncation (BT). In general, this method does not preserve some essential properties of the system; such as stability and symmetry. This article discusses a new projection method for structure preserving model reduction of second-order systems via projecting the system onto the dominant eigen-space of the Gramians of the systems. The proposed method preserves the stability and symmetry of the systems. Numerical experiments are discussed to show the efficiency of the proposed technique.
近年来,二阶到二阶结构保持模型降阶(MOR)得到了广泛的关注。其中最突出的技术是平衡截断(BT)。一般来说,这种方法不能保留系统的一些基本属性;比如稳定性和对称性。本文讨论了一种新的二阶系统保结构模型约简的投影方法,即将系统投影到二阶系统的格拉姆子的显性特征空间上。该方法保持了系统的稳定性和对称性。数值实验证明了该方法的有效性。
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引用次数: 2
Fuzzy logic based task allocation in ant colonies under grid computing 网格计算下基于模糊逻辑的蚁群任务分配
Md. Rashedul Islam, M. Akhtar
Extensive data analysis and a huge computational power is required in every computational grid application such as distributed supercomputing, high-throughput computing etc. Task Allocation strategy plays a vital role in the grid environment in terms of assigning the task to the appropriate ants of the colonies within a satisfactory allocation time. The uncertainty of available supply energy for completion of a task makes the allocation policy for grid computing more challenging. In this paper, we propose a fuzzy-based method for allocating the task among the members of an ant colony under grid computing and try to minimize the time consumption of task allocation. We believed and observed, our proposed model offers an improving performance comparable with traditional approach of allocating task in full assigning or no assigning. Our proposed method, based on the task and energy available from the grid and ants respectively, chooses the distribution of a task in full, half or no task assigning to ants by using fuzzy logic. During arriving of a task, ants will perform and execute the assigned task by using first in first out method. Successful task allocation, as reaching to equilibrium state will be achieved by allocating the task with half supply energy available from the colony. We show that with the use of fuzzy logic under grid environment task allocation problem shows an enhanced efficiency for assignment of tasks among the members of an ant colony.
分布式超级计算、高吞吐量计算等计算网格应用都需要大量的数据分析和巨大的计算能力。在网格环境中,任务分配策略是将任务在满意的分配时间内分配给适当的蚁群的关键。完成一项任务的可用供能的不确定性使得网格计算的分配策略更具挑战性。本文提出了一种基于模糊的网格计算蚁群任务分配方法,并尽量减少任务分配的时间消耗。我们认为并观察到,与传统的任务分配方法相比,我们提出的模型在完全分配和不分配的情况下具有更好的性能。该方法分别基于网格和蚂蚁的可用任务和能量,利用模糊逻辑选择分配给蚂蚁的任务在全任务、半任务和无任务中的分布。在任务到达过程中,蚁群采用先进先出的方法执行分配的任务。任务分配的成功,因为达到平衡状态,将分配任务的一半供应的能量,从群体。研究表明,在网格环境下,使用模糊逻辑可以提高蚁群成员之间任务分配的效率。
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引用次数: 2
Iterative extended spectral subtraction for restoration from image degraded by white noise 基于迭代扩展谱减法的白噪声图像复原方法
Tian-tian Zhou, Yosuke Sugiura, T. Shimamura
It is well known that the iterative spectral subtraction (ISS) method is effective to eliminate white noise in speech, the fact that the ISS method is suitable for restoration from image degraded by white noise has been confirmed. In this paper, we presents an image denoising technique in which an iterative extended spectral subtraction (IESS) method is developed. We discuss the factors of the IESS that affect the restoration results, and by setting the best parameters, set out to improve the performance. We compare the performance of the IESS method with that of state of the art filtering approaches in experiments.
众所周知,迭代谱减法(ISS)对于消除语音中的白噪声是有效的,并证实了ISS方法适用于由白噪声退化的图像进行复原。本文提出了一种基于迭代扩展谱减法(IESS)的图像去噪技术。我们讨论了影响IESS恢复结果的因素,并通过设置最佳参数,着手提高性能。我们在实验中比较了IESS方法与最先进的滤波方法的性能。
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引用次数: 0
An empirical framework for parsing Bangla imperative, optative and exclamatory sentences 孟加拉语祈使句、选择句和感叹句的实证分析框架
T. Alamgir, M. S. Arefin
Parsing is one of the most challenging task in the field of natural language processing and it plays an important role in order to analyze any natural language. To determine a legal structure for a sentence, we need to expose the rules of how sentences of a language are embodied and have a parsing algorithm to analyze sentences using those rules. This paper proposes a new technique to parse the Bangla sentences including imperative, optative and exclamatory sentences using a set of context sensitive grammars (CSG's) rules. This paper considers Bangla sentences based on the intonation or mood of the sentences rather than the structure of the sentences for parsing. The proposed framework can parse Bangla sentences with over 81% accuracy which is quite satisfactory.
解析是自然语言处理领域中最具挑战性的任务之一,它对任何自然语言的分析都起着重要的作用。为了确定句子的法律结构,我们需要公开语言句子的体现规则,并有一个解析算法来使用这些规则分析句子。本文提出了一种基于上下文敏感语法规则的孟加拉语祈使句、选择句和感叹句的句法分析新方法。本文根据孟加拉语句子的语调或语气进行分析,而不是根据句子的结构进行分析。所提出的框架能够以81%以上的准确率解析孟加拉语句子,令人满意。
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引用次数: 1
Assessing the usability of e-government websites of Bangladesh 评估孟加拉电子政府网站的可用性
M. Islam, S. Rahman, M. S. Islam
Usability is the key quality attribute of e-government websites to provide the optimum services to the citizens of the developing countries. This study is aimed to investigate the current usability status of e-government websites of Bangladesh. An empirical study has been conducted to find the possible usability problems of e-government websites of Bangladesh using the two analytical usability evaluation methods. The study was replicated with 22 test-participants. The study results indicate that e-government websites of Bangladesh are significantly suffering usability problems.
可用性是电子政务网站向发展中国家公民提供最优服务的关键质量属性。本研究旨在调查孟加拉电子政务网站的可用性现状。本文运用两种分析性可用性评价方法,对孟加拉国电子政务网站可能存在的可用性问题进行了实证研究。这项研究在22名测试参与者中重复进行。研究结果表明,孟加拉国的电子政务网站存在明显的可用性问题。
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引用次数: 10
Developing a framework for fruits detection from images 开发从图像中检测水果的框架
Md. Shaddam Hossen, M. Arefin, Rezaul Karim
In this paper, we present a method for the detection of fruits from images. Several fruits detection techniques have been developed based on colour and shape values. However, different object images may have similar or identical colour and shape. Therefore, using only colour and shape features are not efficient enough for fruits detection. Considering this fact, in this paper, we propose a method using colour, shape and texture for detecting objects from images. We performed several experiments using fruits images and found that our system can almost accurately detect fruits types from images.
本文提出了一种从图像中检测水果的方法。几种基于颜色和形状值的水果检测技术已经发展起来。然而,不同的物体图像可能具有相似或相同的颜色和形状。因此,仅使用颜色和形状特征是不够有效的水果检测。考虑到这一点,本文提出了一种基于颜色、形状和纹理的图像目标检测方法。我们使用水果图像进行了几次实验,发现我们的系统几乎可以准确地从图像中检测水果类型。
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引用次数: 3
Linking the features of a cycloconverter and controlled rectifier in a single circuit 将循环变换器和可控整流器的特性连接在一个电路中
Abdullah Mahmud, Taufiquzzaman, A. Ahsan, Muhtasheem Ajwad Mahin, A. Mohammad
This research proposes a single circuit dual purpose converter which can perform both cycloconverter (AC to AC) and rectifier (AC to DC) operation. A controller is designed to get desired output from the proposed converter. Switching signals for two different modes are generated using the controller. The mode of operation of the proposed converter will be determined by a control signal given by user. The input is AC in both modes of operation. Necessary simulations are performed in PSIM.
本研究提出一种单路两用变换器,可同时进行环变换器(交转交)和整流器(交转直流)的工作。设计了一个控制器,以从所建议的转换器获得所需的输出。使用控制器产生两种不同模式的切换信号。所提出的转换器的工作模式将由用户给出的控制信号来决定。在两种工作模式下,输入都是交流电。在PSIM中进行了必要的仿真。
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引用次数: 1
ATP analysis of direct lightning strike on a telecommunication tower suited over multistoriec building 适用于多层建筑的电信塔的直接雷击的ATP分析
Md. Zoyheroul Islam, Md. Salah Uddin Yusuf
Now a days lightning performance of telecommunication tower is an important issue of major interest for wireless communication service provider utility companies. Lightning is the most important and severe external transient phenomenon that can cause dangerous over voltages on transmission line, damages of sophisticated electronic equipment, terrible induced high voltages as well as electromagnetic compatibility problems on power transmission and telecommunication system. Telecommunication tower suited on the roof of multistoried building can be easily hit by direct lightning strike and telecommunication tower can cause dangerous overvoltages, which can result in malfunction of the sensitive equipment as well as dangerous step and touch voltages then finally hampered the communication system connected to the tower. This paper demonstrates the lightning surge response and effect of direct stroke for typical mobile phone tower suited on multistoried building roof. The simulation of the electromagnetic transient process, caused from the lightning stroke on the different portion of the tower and building have been carried out over the usage of the ATP Draw (Alternative Transient Program) software tool. ATP Draw is a mouse-driven, graphical preprocessor to the ATP version of the Electromagnetic Transients Program (EMTP) on the Microsoft Windows platform. The Alternative Transients Program (ATP) is considered to be one of the most widely used universal program in electric power systems for digital simulation of transient phenomena of electromagnetic as well as electromechanical nature. The key focus of the study has been the assessment of the surge characteristics of the different portion of the structure under the effect of a lightning sources. Surge impedance, Voltage and currents at different portion of this tower are evaluated to observe lightning phenomena for designing of protective equipment to save the sensitive electronic parts and equipment contains tower and building.
目前,电信铁塔的雷电性能是无线通信服务提供商和公用事业公司关心的一个重要问题。雷电是一种重要而严重的外部暂态现象,它会对输电线路造成危险的过电压,损坏精密电子设备,产生可怕的感应高压,并对输电和电信系统造成电磁兼容问题。适用于多层建筑屋顶的电信塔容易受到直击雷击,电信塔会产生危险的过电压,从而导致敏感设备的故障,并产生危险的步进电压和接触电压,最终使与塔相连的通信系统陷入瘫痪。本文对适用于多层建筑屋顶的典型移动电话塔的雷击浪涌响应及直接冲击效应进行了分析。利用ATP Draw (Alternative transient Program)软件工具,对雷击对塔和建筑物不同部位产生的电磁瞬变过程进行了模拟。ATP Draw是一个鼠标驱动的图形预处理器,用于Microsoft Windows平台上的电磁瞬变程序(EMTP)的ATP版本。备选暂态程序(ATP)被认为是电力系统中应用最广泛的用于电磁和机电性质暂态现象数字仿真的通用程序之一。研究的重点是评估雷源作用下结构不同部分的浪涌特性。通过对该塔不同部位的浪涌阻抗、电压和电流进行评估,观察雷电现象,为设计保护设备提供依据,以保护敏感的电子部件和包含塔和建筑物的设备。
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引用次数: 1
期刊
2017 International Conference on Electrical, Computer and Communication Engineering (ECCE)
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