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2008 IEEE International Multitopic Conference最新文献

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Time Difference of Arrival estimation using super resolution algorithms to minimize Distance Measurement Error for indoor positioning systems 利用超分辨率算法估计到达时间差以减小室内定位系统的距离测量误差
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777779
T. Khanzada, A. Ali, A. Omar
This paper presents the utilization of super resolution algorithms for the indoor positioning applications in order to estimate Time difference of Arrival (TDOA) and distances using OFDM transceiver. Optimal reduction in Distance Measurement Error (DME) is achieved. We have utilized OFDM/SC-DFE signal structure presented in our previous works. Three super resolution algorithms i.e. Estimation of Signal Parameters via Rotational Invariance Technique (ESPRIT), Root-Multiple Signal Classification (RootMUSIC) and Matrix Pencil (MP) are being compared for DME estimation. We have applied Minimum Descriptive Length (MDL) criteria to these algorithms, that provides optimize estimate of the length of actual CIR by eliminating the noise component from the dispersive CIR. Our scheme is based on two different antennas used to transmit the pre-half-zero-carriers and post-half-zero-carriers OFDM symbols respectively, mapped to multiple carriers using Wireless Local Area Network (WLAN) system and received by a single to be positioned object. An analysis of DME estimation is presented for varying Signal to Noise Ratio (SNR). DME reduction approaching to zero is achieved by the MP algorithm using our scheme.
本文介绍了在室内定位应用中利用超分辨率算法来估计OFDM收发器的到达时间差和距离。实现了距离测量误差(DME)的最佳减小。我们采用了之前工作中提出的OFDM/SC-DFE信号结构。三种超分辨率算法,即信号参数估计通过旋转不变性技术(ESPRIT),根多信号分类(RootMUSIC)和矩阵铅笔(MP)进行比较,以估计DME。我们将最小描述长度(MDL)标准应用于这些算法,通过消除色散CIR中的噪声分量来提供实际CIR长度的优化估计。我们的方案基于两个不同的天线,分别用于传输前半零载波和后半零载波OFDM符号,通过无线局域网(WLAN)系统映射到多个载波,并由单个待定位对象接收。对不同信噪比下的DME估计进行了分析。采用该方案的MP算法实现了趋近于零的DME约简。
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引用次数: 18
Enhancement of exudates for the diagnosis of diabetic retinopathy using Fuzzy Morphology 模糊形态学增强渗出液对糖尿病视网膜病变的诊断价值
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777722
Muhammed Khalid Anis, Muhammad Khurram Khan, S. J. H. Zaidi, A. Mansoor, Zohaib Khan, Adil Khan, Shoab A. Khan
This paper presents a novel algorithm based on fuzzy morphology for the computer-assisted enhancement of exudates in fundus images of human retina for the diagnosis of diabetic retinopathy. Diabetic retinopathy is a common disease in diabetic persons. The disease is diagnosed by the presence of exudates in the macular region. Here, we use fuzzy morphology for the enhancement of exudates. The fundus image is first converted to grayscale followed by a series of fuzzy erosion and fuzzy dilation (morphological closing operation) with a diamond shaped structuring element. Finally, the resulting image is added to the original image to transform into enhanced one. Experiments were performed on a database of variety of fundus images with and without the disease. The experiments led to convincing results and the images were enhanced for easier clinical examination.
本文提出了一种基于模糊形态学的人眼视网膜眼底图像渗出物计算机辅助增强算法,用于糖尿病视网膜病变的诊断。糖尿病视网膜病变是糖尿病患者的常见病。这种疾病是通过黄斑区域渗出物的存在来诊断的。在这里,我们使用模糊形态学来增强渗出物。首先将眼底图像转换为灰度,然后用菱形结构元进行一系列模糊侵蚀和模糊扩张(形态学闭合操作)。最后,将得到的图像与原始图像相加,变换为增强图像。实验是在各种眼底图像的数据库中进行的,有和没有疾病。实验结果令人信服,图像增强,便于临床检查。
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引用次数: 25
Low voltage high performance self cascode CCII 低电压高性能自级联CCII
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777698
J. Kaur, N. Prakash, S. S. Rajput
A current mirror (CM) is reconfigured based on self cascode (SC) arrangement, useful for low voltage (LV) analog and mixed mode circuits. The CM uses 4 MOSFETs, has high input and output swing, operating at plusmn0.5 V supply. Further, a novel CMOS CCII has been revisited and implemented using this CM for sourcing the mirrored current into a high impedance output node. P-spice simulations confirm the performance of CM and CCII. The CCII has voltage transfer bandwidth of 76 MHz and a current transfer bandwidth of 77 MHz respectively.
基于自级联码(SC)排列重新配置了电流反射镜(CM),适用于低压(LV)模拟和混合模式电路。CM使用4个mosfet,具有高输入和输出摆幅,工作在+ 0.5 V电源下。此外,一种新的CMOS CCII已经被重新审视和实现,使用该CM将镜像电流导入高阻抗输出节点。P-spice仿真验证了CM和CCII的性能。CCII的电压传输带宽为76 MHz,电流传输带宽为77 MHz。
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引用次数: 8
Towards a model of a multi- mobile robot system 一个多移动机器人系统的模型
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777742
F. Leghari, J. Ahmad, Mmh Sarker, M. Hoque, K. K. Islam
South Asian countries are full of rivers, and big/small boat is an important vehicle for communication in many places. It is an unavoidable issue to rescue the people when they fall on danger for any natural and/or man-made cause. Water vehicle shows better efficacy instead of air vehicle for developing countries. Therefore, the basic principles and methods towards an automated rescue system is outlined. The architectures of distributed system along with math-logics are presented. Electronic devices/components used for data is discussed. Performance of the present system is analyzed and presented.
南亚国家河流众多,大大小小的船只在很多地方都是重要的交通工具。当人们因自然和/或人为原因陷入危险时,营救他们是一个不可避免的问题。在发展中国家,水上交通工具表现出比空中交通工具更好的功效。因此,本文概述了自动救援系统的基本原理和方法。给出了分布式系统的体系结构和数学逻辑。讨论了用于数据的电子设备/组件。对系统的性能进行了分析和介绍。
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引用次数: 1
The Multi-Stage-Lambert Scheme for steering a satellite-launch vehicle (SLV) 卫星运载火箭(SLV)转向的多阶段兰伯特方案
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777752
S. Kamal
The determination of an orbit, having a specified transfer time (time-of-flight) and connecting two position vectors, frequently referred to as the Lambert problem, is fundamental in astrodynamics. Of the many techniques existing for solving this two-body, two-point, time-constrained orbital boundary-value problem, Gauss' and Lagrange's methods were combined to obtain an elegant algorithm based on Battin's work. This algorithm included detection of cross-range error. A variable TYPE, introduced in the transfer-time equation, was flipped, to generate the inverse-Lambert scheme. In this paper, an innovative adaptive scheme is presented, which is called ldquothe multi-stage-Lambert schemerdquo. This scheme proposes a design of autopilot, which achieves the predecided destination position and velocity vectors for a multi-stage rocket, when each stage is detached from the main vehicle after it burns out, completely.
轨道的确定,具有指定的传递时间(飞行时间)和连接两个位置向量,通常被称为兰伯特问题,是天体动力学的基础。在解决这一两体、两点、时间约束的轨道边值问题的许多现有技术中,高斯和拉格朗日的方法被结合起来,以Battin的工作为基础,得到了一个优雅的算法。该算法包括交叉距离误差的检测。将传递时间方程中引入的变量TYPE进行翻转,生成逆朗伯格式。本文提出了一种创新的自适应方案,称为多阶段兰伯特方案。该方案提出了一种自动驾驶仪的设计方案,该方案实现了多级火箭在完全燃烧后与主飞行器分离时的预定目标位置和速度矢量。
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引用次数: 3
QoS based Distributed Multipath Routing Algorithm for IPv6 基于QoS的IPv6分布式多路径路由算法
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777757
M.O. Farooq, S. Aziz
In this paper we propose QoS based distributed multipath routing algorithm for IPv6 (QoS-MPR). The algorithm is able to work alongside traditional routing algorithms and it can construct label switched paths in order to provide rigorous QoS guarantees. QoS-MPR is developed to work with differentiated services architecture and its capability to establish label switched paths allows us to inject more QoS sensitive traffic into the network hence, network utilization increases as shown in the simulation results. Our simulation results show that QoS-MPR provides splendid packet delivery ratio, it utilizes resources present on multiple paths to the destination, network utilization increases as a function of number of paths exits to a network, QoS flows established using QoSMPR experience less delay and each admitted flow shows compliance with its service level agreement (SLA).
本文提出了一种基于QoS的IPv6分布式多路径路由算法(QoS- mpr)。该算法能够与传统的路由算法一起工作,并且可以构造标签交换路径,以提供严格的QoS保证。QoS- mpr被开发用于差异化服务架构,其建立标签交换路径的能力允许我们向网络注入更多的QoS敏感流量,从而提高网络利用率,如仿真结果所示。仿真结果表明,QoS- mpr提供了良好的分组分发率,它利用了到达目的地的多条路径上的资源,网络利用率随网络出口路径数的增加而增加,使用QoSMPR建立的QoS流的延迟较小,每个被接纳的流都符合其服务水平协议(SLA)。
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引用次数: 4
Citation rank prediction based on bookmark counts: Exploratory case study of WWW06 papers 基于书签计数的引文排名预测——以WWW06论文为例
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777769
A. Us Saeed, M. Afzal, A. Latif, K. Tochtermann
New developments in the collaborative and participatory role of Web has emerged new web based fast lane information systems like tagging and bookmarking applications. Same authors have shown elsewhere, that for same papers tags and bookmarks appear and gain volume very quickly in time as compared to citations and also hold good correlation with the citations. Studying the rank prediction models based on these systems gives advantage of gaining quick insight and localizing the highly productive and diffusible knowledge very early in time. This shows that it may be interesting to model the citation rank of a paper within the scope of a conference or journal issue, based on the bookmark counts (i-e count representing how many researchers have shown interest in a publication.) We used linear regression model for predicting citation ranks and compared both predicted citation rank models of bookmark counts and coauthor network counts for the papers of WWW06 conference. The results show that the rank prediction model based on bookmark counts is far better than the one based on coauthor network with mean absolute error for the first limited to the range of 5 and mean absolute error for second model above 18. Along with this we also compared the two bookmark prediction models out of which one was based on total citations rank as a dependent variable and the other was based on the adjusted citation rank. The citation rank was adjusted after subtracting the self and coauthor citations from total citations. The comparison reveals a significant improvement in the model and correlation after adjusting the citation rank. This may be interpreted that the bookmarking mechanisms represents the phenomenon similar to global discovery of a publication. While in the coauthor nets the papers are communicated personally and this communication or selection may not be captured within the bookmarking systems.
网络协作和参与性角色的新发展已经出现了新的基于网络的快速通道信息系统,如标签和书签应用程序。同样的作者在其他地方表明,对于同样的论文,与引用相比,标签和书签的出现和增长速度非常快,并且与引用保持良好的相关性。研究基于这些系统的排名预测模型,有利于快速洞察并在很早的时间内定位高生产力和可扩散的知识。这表明,基于书签计数(i-e计数代表有多少研究人员对出版物表现出兴趣),在会议或期刊发行范围内对论文的引用排名进行建模可能会很有趣。我们采用线性回归模型对WWW06会议论文的引文排名进行预测,并比较了书签数和合著者网络数预测的引文排名模型。结果表明,基于书签计数的排名预测模型远优于基于合著者网络的排名预测模型,前者的平均绝对误差在5以内,后者的平均绝对误差在18以上。与此同时,我们还比较了两种书签预测模型,其中一种基于总引用排名作为因变量,另一种基于调整后的引用排名。在总引用数中减去自我和合著者的引用数后调整引文排名。比较发现,调整引文排名后,模型和相关性都有了显著改善。这可以解释为书签机制代表了类似于出版物的全局发现的现象。而在共同作者网络中,论文是亲自交流的,这种交流或选择可能不会在书签系统中被捕获。
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引用次数: 4
prediction of fault count data using genetic programming 基于遗传规划的故障计数数据预测
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777762
W. Afzal, R. Torkar, R. Feldt
Software reliability growth modeling helps in deciding project release time and managing project resources. A large number of such models have been presented in the past. Due to the existence of many models, the models' inherent complexity, and their accompanying assumptions; the selection of suitable models becomes a challenging task. This paper presents empirical results of using genetic programming (GP) for modeling software reliability growth based on weekly fault count data of three different industrial projects. The goodness of fit (adaptability) and predictive accuracy of the evolved model is measured using five different measures in an attempt to present a fair evaluation. The results show that the GP evolved model has statistically significant goodness of fit and predictive accuracy.
软件可靠性增长建模有助于确定项目发布时间和管理项目资源。过去已经提出了大量这样的模型。由于许多模型的存在,这些模型固有的复杂性,以及它们所伴随的假设;选择合适的模型成为一项具有挑战性的任务。本文给出了基于三个不同工业项目的周故障数数据,将遗传规划(GP)用于软件可靠性增长建模的实证结果。采用五种不同的测量方法来衡量模型的拟合优度(适应性)和预测精度,试图给出一个公平的评价。结果表明,GP进化模型具有统计学上显著的拟合优度和预测精度。
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引用次数: 40
Power optimized secure Bluetooth communication 电源优化安全蓝牙通信
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777733
M. J. Chaudhry, S. Murawwat, F. Saleemi, S. Tariq, M. Saleemi, F. J. Chaudhry
Bluetooth is one of the emerging technologies, which is capable of providing many services such as High data throughput, Adhoc networks, providing an excellent data transmission medium and many more other services and applications. To provide all these features and services power consumption is quite high in comparison with other mobile devices. Like keeping the device size small will result in less operation tine of device or degraded the throughput, so there is a strong need for a power optimized algorithm which keeps the data throughput higher using minimum power consumption. As Bluetooth defines a uniform structure for huge range of devices to communicate and transfer data with each other, with minimum user efforts, Bluetooth also offers wireless access to LANs, the mobile phone network and the internet for a host of many home appliances and portable handheld devices. As Bluetooth has to provide many services security issues have to satisfied like Bluetooth devices are part of peoples personal usage and will communicate and transfer their very personal information, confidential business information or other sensitive data. This must be protected from being spoofed or mutilated. Encryption facility is very excellent solution for security vulnerabilities occurs in Bluetooth communication. This paper presents the detailed comparison study of old and current algorithms and techniques used for power optimization and security issues in Bluetooth communication and an appropriate solution will be presented particularly for two major issues of Bluetooth power consumption, security and other issues related to both of them finally, an efficient scheme which will positively enable us to provide all the desired services and application but in an economical and secure way with respect to power consumption and security vulnerabilities. Furthermore, this research also presents the discussion of how proposed scheme can be implemented in a straight-forward fashion.
蓝牙是一种新兴的技术,它能够提供高数据吞吐量、Adhoc网络等许多服务,提供了一种优秀的数据传输介质和许多其他服务和应用。为了提供所有这些功能和服务,与其他移动设备相比,功耗相当高。由于设备尺寸越小,设备的运行时间越短,吞吐量越低,因此迫切需要一种功耗优化算法,以最小的功耗保持较高的数据吞吐量。蓝牙为大量设备定义了一种统一的结构,用户只需付出最少的努力就可以相互通信和传输数据。蓝牙还为许多家用电器和便携式手持设备提供了无线接入局域网、移动电话网络和互联网的能力。由于蓝牙必须提供许多服务,安全问题必须得到满足,因为蓝牙设备是人们个人使用的一部分,并且会通信和传输他们的非常个人信息,机密商业信息或其他敏感数据。必须保护它不被欺骗或破坏。加密功能是解决蓝牙通信中出现的安全漏洞的一个很好的方案。本文对蓝牙通信中功耗优化和安全问题的旧算法和技术进行了详细的比较研究,并针对蓝牙功耗、安全以及与两者相关的两个主要问题提出了合适的解决方案。一个有效的方案,它将积极地使我们能够提供所有所需的服务和应用程序,但在功耗和安全漏洞方面,以经济和安全的方式。此外,本研究还讨论了如何以直接的方式实现所提出的方案。
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引用次数: 8
Smoothing the response of a gain scheduled autopilot for flexible flight vehicle by online tuning based on neural networks 基于神经网络在线整定的柔性飞行器增益调度自动驾驶仪响应平滑
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777788
A. Ali, W. Qing
The challenging task of designing an auto pilot for non linear time varying flexible flight vehicle system under conflicting design requirements requires a gain scheduled controller throughout the flight. But still the final solution is bound to end up in some compromises with proper gain scheduling. The switching from one gain to another gain value creates disturbances in the flight and therefore this transition of gains must be smoothened. This is achieved by introducing an adaptive pid controller based on neural network as a supplementary to the main controller.
在设计要求冲突的情况下,设计非线性时变柔性飞行器系统的自动驾驶仪是一项具有挑战性的任务,需要在整个飞行过程中使用增益调度控制器。但是,最终的解决方案必然会以适当的增益调度为妥协而告终。从一个增益值切换到另一个增益值会在飞行中产生干扰,因此增益的转换必须平滑。这是通过引入基于神经网络的自适应pid控制器作为主控制器的补充来实现的。
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引用次数: 1
期刊
2008 IEEE International Multitopic Conference
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