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2012 15th International Conference on Computer and Information Technology (ICCIT)最新文献

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Time and space efficient algorithm for consumer's priority product management 基于时间和空间的消费者优先级产品管理算法
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509793
M. N. Al-Ameen, Mehrab Shahriar, A. Billah
In this highly competitive free market economy, the test or interest of a certain consumer plays a momentous role for the business organizations to select appropriate products to be advertised to him through the online store or their website. In other words, business organizations need to be proficient in advertising their products to attract the potential consumers. To achieve the goal, organizations have to keep track of the consumers' buying habit to figure out the priority products. Thus the consumers' priority product management is a candidate for high degree of attention. In this paper, we have developed and analyzed the algorithm for consumers' priority product management with minimum time and space complexity. We use the concept of balanced binary search tree in this case to attain efficient time complexity. For reducing space requirement, we have proposed merging algorithm that incorporates with the balanced binary search tree, to achieve the optimal performances. We have simulated for 1 million test cases and our results show that the algorithm achieves a high memory saving index with logarithmic time complexity in each working round.
在这个高度竞争的自由市场经济中,某个消费者的测试或兴趣对于商业组织选择合适的产品通过网上商店或他们的网站向他做广告起着重要的作用。换句话说,商业组织需要精通他们的产品广告,以吸引潜在的消费者。为了实现这一目标,组织必须跟踪消费者的购买习惯,找出优先购买的产品。因此,消费者的优先产品管理是一个值得高度关注的候选产品。本文开发并分析了具有最小时间和空间复杂度的消费者优先级产品管理算法。在这种情况下,我们使用平衡二叉搜索树的概念来获得有效的时间复杂度。为了减少对空间的需求,我们提出了结合平衡二叉搜索树的合并算法,以达到最优的性能。我们对100万个测试用例进行了模拟,结果表明,该算法在每个工作轮中都达到了具有对数时间复杂度的高内存节省指数。
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引用次数: 1
UMTS and WiMAX handover performance comparison UMTS和WiMAX切换性能比较
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509794
A. Chowdhury, M. Gregory
Convergence of telecommunications, Internet, entertainment, and information technologies is an important driver for the seamless provisioning of multimedia services across different network types. The emergence of various radio access technologies and wireless data communication networks has revolutionized the entire telecommunications industry. By and large, 3G UMTS has become a major wireless cellular technology and IEEE 802.16 WiMAX has been widely accepted as a convenient alternative to the conventional mobile communication networks. In mobile communication systems, handoff/handover controls are critical to ensure a seamless migration as devices move from place-to-place. This paper analyzes the performance of the existing types of handover applied in the third generation mobile networks and compares them with handover used in WiMAX.
电信、互联网、娱乐和信息技术的融合是跨不同网络类型无缝提供多媒体服务的重要驱动因素。各种无线接入技术和无线数据通信网络的出现使整个电信行业发生了革命性的变化。总的来说,3G UMTS已经成为一种主要的无线蜂窝技术,IEEE 802.16 WiMAX作为一种方便的替代传统移动通信网络已经被广泛接受。在移动通信系统中,切换/切换控制对于确保设备从一个地方移动到另一个地方的无缝迁移至关重要。本文分析了第三代移动网络中现有切换类型的性能,并与WiMAX中使用的切换进行了比较。
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引用次数: 3
TCP performance enhancement over IEEE 802.11 基于IEEE 802.11的TCP性能增强
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509788
M. M. S. Kowsar, Mominul Islam
Transmission Control protocol (TCP) establishes a connection between two host computers in a virtual network and exchanges streams of data. TCP ensures that transfer of data and packets will be delivered in the same order as they were sent. The network topology is designed in a wireless network environment which is IEEE 802.11. TCP is a connection-oriented, end-to-end reliable protocol which is existing in our network topology. In this simulation the total number of nodes is 10. Reno, New Reno are generally used in a network topologies to control congestion. But in these cases Packet Delivery Fraction (PDF) is not sufficient, delay is high, packet loss is also high as it takes longer time to detect and recover packet loss. In order to improve retransmission scheme we propose an updated version of New Reno. It does not have to wait for 3 duplicate acknowledgements, thus it can retransmit faster and doesn't reduce the window size too much prematurely. For evaluating this performance we use NS-2.34 which is the most suitable network simulator in wired and wireless network environment.
传输控制协议(TCP)在虚拟网络中的两台主机之间建立连接并交换数据流。TCP确保数据和数据包的传输将按照发送的顺序进行。网络拓扑是在IEEE 802.11无线网络环境下设计的。TCP是一种面向连接、端到端可靠的协议,存在于我们的网络拓扑结构中。在此模拟中,节点总数为10。Reno、New Reno一般用于网络拓扑中控制拥塞。但是在这些情况下,包交付分数(PDF)不够,延迟高,丢包也高,因为检测和恢复丢包需要更长的时间。为了改进重传方案,我们提出了一个更新版本的New Reno。它不需要等待3次重复的确认,因此它可以更快地重传,并且不会过早地减少窗口大小。为了评估这一性能,我们使用了最适合有线和无线网络环境的网络模拟器NS-2.34。
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引用次数: 1
Bringing DSpace-based digital libraries into mobile devices 将基于dspace的数字图书馆带入移动设备
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509810
I. B. da Rosa, I. Shmorgun, S. Sousa, Veronika Rogalevits, D. Lamas
Digital libraries (DLs) have revolutionized the access to library materials. Very often they are even the best alternative. However, in some regions where computer and Internet access are a real issue, the usage of mobile devices for accessing such libraries seem to be a good alternative. This paper presents a design of an alternative mechanism for accessing DSpace-based digital libraries on mobile phones. Such mechanism can be particularly relevant for developing countries, where there are serious problems with the traditional publishing and distribution mechanisms and where computer penetration rate is very low.
数字图书馆(dl)已经彻底改变了图书馆资料的获取方式。很多时候,它们甚至是最好的选择。然而,在一些地区,电脑和互联网接入是一个真正的问题,使用移动设备访问这些图书馆似乎是一个很好的选择。本文提出了一种在手机上访问基于dspace的数字图书馆的替代机制的设计。这种机制对发展中国家尤其重要,因为这些国家的传统出版和分发机制存在严重问题,而且计算机普及率很低。
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引用次数: 1
Gender effect cannonicalization for Bangla ASR 孟加拉ASR的性别效应规范化
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509701
Md. Asfak-Ur-Rahman, Mohammed Rokibul Alam Kotwal, Foyzul Hassan, S. Ahmmed, M. N. Huda
This paper presents a Bangla (widely used as Bengali) automatic speech recognition system (ASR) by suppressing gender effects. Gender characteristic plays an important role on the performance of ASR. If there is a suppression process that represses the decrease of differences in acoustic-likelihood among categories resulted from gender factors, a robust ASR system can be realized. In the proposed method, we have designed a new ASR incorporating the Local Features (LFs) instead of standard mel frequency cepstral coefficients (MFCCs) as an acoustic feature for Bangla by suppressing the gender effects, which embeds three HMM-based classifiers for corresponding male, female and geneder-independent (GI) characteristics. In the experiments on Bangla speech database prepared by us, the proposed system has achieved a significant improvement of word correct rates (WCRs), word accuracies (WAs) and sentence correct rates (SCRs) in comparison with the method that incorporates Standard MFCCs.
提出了一种抑制性别影响的孟加拉语自动语音识别系统(ASR)。性别特征对ASR的表现起着重要作用。如果存在一个抑制过程,可以抑制由性别因素导致的类别间声学似然差异的减少,则可以实现一个鲁棒的ASR系统。在提出的方法中,我们设计了一个新的ASR,通过抑制性别效应,将局部特征(LFs)代替标准mel频率倒谱系数(MFCCs)作为孟加拉语的声学特征,该ASR嵌入了三个基于hmm的分类器,分别用于对应的男性、女性和性别无关(GI)特征。在我们准备的孟加拉语语音数据库的实验中,该系统在单词正确率(wcr)、单词正确率(WAs)和句子正确率(SCRs)方面都比采用标准mfccc的方法有了显著提高。
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引用次数: 3
Adaptive array antenna for WLAN: A smart approach to beam switching through phase shifting in feed network 无线局域网自适应阵列天线:一种通过馈电网络相移实现波束交换的智能方法
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509786
Md Mirazur Rahman, S. Dey, N. Saha
The WLAN is operated in some high traffic area where the radiation beam produced by the antenna is to be utilized with optimum efficiency. The aim of those antennas is to produce some directive and switched beams rather than producing Omni-directional pattern since these beam patterns are considered to be wastage in some non-used or low traffic areas. Hence, the antenna systems producing the directive and switched beams should be highly preferred for the WLAN application. A smart antenna array system performs the adaptive beam forming by focusing the beam in the desired direction and creating nulls in other directions to avoid the interference and the wasting of the beams. This is performed by the operating the phase shifting in its feed network and different ports. This paper investigates the performance of the different array patterns with different phase shifting for the optimum performance of the WLAN applications in a high congested indoor environment.
无线局域网在高通信量区域中运行,在该区域中,天线产生的辐射波束将以最佳效率得到利用。这些天线的目的是产生一些定向和切换波束,而不是产生全向波束,因为这些波束在一些未使用或低流量区域被认为是浪费。因此,产生指示波束和开关波束的天线系统对于WLAN应用应该是高度优选的。智能天线阵列系统通过在期望方向上聚焦波束并在其他方向上产生零点来实现自适应波束形成,以避免波束的干扰和浪费。这是通过在馈电网络和不同端口中操作相移来实现的。为了在高拥塞的室内环境中实现无线局域网的最佳性能,本文研究了不同相移阵列的性能。
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引用次数: 2
iClassroom: Toward a low cost interactive classroom 课堂:走向低成本的互动课堂
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509739
M A Rahman, V K Sarker, K A Sayeed
Use of computer technology in modern student centred leaning is playing a vital role. Works are going on in the developed countries in building interactive teaching tools which will give more degrees of freedom to both the teachers and the students in the learning process. In this process, classroom itself can play an important role. So we have developed an interactive classroom. iClassroom is a low-cost classroom system with an interactive whiteboard and an automatic attendance taking system mainly for developing regions. The classroom additionally provides the control panel for electrical devices present in the classroom.
计算机技术的应用在现代以学生为中心的学习中起着至关重要的作用。发达国家正在努力建立互动式教学工具,使教师和学生在学习过程中享有更大的自由度。在这个过程中,课堂本身可以发挥重要的作用。所以我们开发了一个互动课堂。iClassroom是一个低成本的课堂系统,主要面向发展中地区,具有交互式白板和自动考勤系统。教室还为教室内的电气设备提供控制面板。
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引用次数: 0
BER performance analysis of M-ary modulation techniques in an outdoor environment with MLSE equalizer over fading channels 室外环境下MLSE均衡器调制技术在衰落信道上的误码率性能分析
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509742
T. Ahmed, M. M. Ali, M. Sarkar
In this paper, we consider a communication system that uses M-ary phase shift keying (MPSK), M-ary quadrature amplitude modulation (MQAM), M-ary differential phase shift keying (MDPSK) and M-ary pulse amplitude modulation (MPAM) to transmit information over a Rayleigh and Ricean fading channel perturbed by additive white Gaussian noise (AWGN). We model the fading channel using Jakes Doppler power spectrum and AJakes Doppler power spectrum. The performance of these different modulation techniques is analyzed in terms of bit error rate (BER) for single and multipath Rayleigh fading channel in outdoor environment by MATLAB simulation. For the simulation of fading channel the different property values e.g. path delays, average path gains, maximum Doppler shifts, Doppler spectrum parameters etc are chosen properly to a reflect realistic fading channels. In all the cases, our analysis shows that MQAM performs better and the system performance increases with the use of maximum likelihood sequence estimation (MLSE) equalizer over Rayleigh and Ricean Fading channels.
在本文中,我们考虑了一种通信系统,该通信系统使用M-ary相移键控(MPSK)、M-ary正交调幅(MQAM)、M-ary差分相移键控(MDPSK)和M-ary脉冲调幅(MPAM)在加性高斯白噪声(AWGN)干扰下的瑞利和赖斯衰落信道上传输信息。我们利用杰克多普勒功率谱和杰克多普勒功率谱对衰落信道进行建模。通过MATLAB仿真,从室外环境下单径和多径瑞利衰落信道误码率的角度分析了不同调制技术的性能。在衰落信道仿真中,适当选择不同的信道时延、平均增益、最大多普勒频移、多普勒频谱参数等属性值,以反映真实的衰落信道。在所有情况下,我们的分析表明MQAM性能更好,并且在瑞利和赖斯衰落信道上使用最大似然序列估计(MLSE)均衡器可以提高系统性能。
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引用次数: 0
Remote-touch: Augmented reality based marker tracking for smart home control 远程触摸:基于增强现实的智能家居控制标记跟踪
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509774
Ahmed Mohmmad Ullah, Md. Rashedul Islam, Sayeda Farzana Aktar, S. A. Hossain
People of physical limitations like old age people, physically disabled people, and autistic people face a lot of challenges to accomplish their daily tasks. It is hard for them to operate regular appliances (like fan, light, opening or closing the window) which may seem very casual for us who are physically blessed. Now a days touch based controlling has greater psychological impact on human mind. Touch uses the user's imagination power more. Driven by these key thinking, we have thought of a home appliance controlling system — touch based smart home which augments the users real life experience. In this paper we describe the development of a prototype that uses the augmented reality based on touch controlling system to control the daily home appliances in a smart home. We have used a smart phone to design the user interface, QR code to track appliances, web service to communicate between the central controlling system and a client app (the smart phone), through X10 to control the appliances physically.
身体有限制的人,如老年人、残疾人和自闭症患者,在完成日常任务时面临很多挑战。他们很难操作常规的电器(如风扇,灯,开窗或关窗),这对我们这些身体上有福气的人来说可能是非常随意的。如今,基于触摸的控制对人类的心理产生了更大的影响。触摸更多地使用了用户的想象力。在这些关键思想的驱动下,我们想到了一种家电控制系统——基于触摸的智能家居,增强了用户的真实生活体验。在本文中,我们描述了一个原型的开发,使用基于增强现实的触摸控制系统来控制智能家居中的日常家电。我们用智能手机设计用户界面,用二维码跟踪家电,用web服务实现中控系统与客户端app(智能手机)之间的通信,通过X10对家电进行物理控制。
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引用次数: 32
A Greedy Approach in Path Selection for DFS Based Maze-map Discovery Algorithm for an autonomous robot 基于DFS的自主机器人迷宫地图发现算法路径选择中的贪心方法
Pub Date : 2012-12-01 DOI: 10.1109/ICCITECHN.2012.6509798
Md. Sazzad Mahmud, Ujjal Sarker, M. Islam, H. Sarwar
This research addresses the map discovery issue for an autonomous robot in an unknown maze. Breadth First Search (BFS) and Depth First Search (DFS) algorithm can be used to do it. Here, we proposed three variants of DFS to discover the map of unknown maze. We implemented Greedy Approach in Path Selection for DFS Based Maze-map Discovery Algorithm which is one of the variants of DFS based approaches. Performance analysis with standard DFS shows that this algorithm produces better result in terms of number of movements and number of rotations. However, we also found that this performance improvement is dependent on certain parameters like the starting position of the robot, presence of boxed pattern in the maze, number of walls, etc.
本研究解决了自主机器人在未知迷宫中的地图发现问题。可以使用广度优先搜索(BFS)和深度优先搜索(DFS)算法来实现。在这里,我们提出了三种变体的DFS来发现未知迷宫的地图。基于DFS的迷宫地图发现算法是基于DFS的迷宫地图发现算法的一种变体,我们在路径选择中实现了贪心算法。用标准DFS进行性能分析表明,该算法在移动次数和旋转次数方面都有较好的效果。然而,我们也发现这种性能改进取决于某些参数,如机器人的起始位置,迷宫中盒装图案的存在,墙壁的数量等。
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引用次数: 9
期刊
2012 15th International Conference on Computer and Information Technology (ICCIT)
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