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2008 IEEE International Multitopic Conference最新文献

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Development of a safe mode attitude control for a FPGA based micro satellite 基于FPGA的微卫星安全模式姿态控制的研制
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777705
M. Yasir, G. Grillmayer, H. Roeser
This paper presents the development of the safe mode attitude controller for the micro-satellite Flying Laptop (FLP). The safe mode for the FLP is defined as the situation when the satellite is able to continue its normal operation with reduced functionality on the occurrence of serious anomaly in the software or the hardware of the satellite, which cannot be automatically processed and corrected on board. This mode is used to ensure the satellite's vital functions (e.g. on board power) while in the meantime, the failure is being analyzed on ground. In safe mode, the satellite is controlled through autonomous software dedicated for such a condition. The sensors used for this mode should reflect high reliability and the sensor outputs need to be available all the time, however only a coarse pointing knowledge is required during this mode.
介绍了微型卫星飞行笔记本安全模式姿态控制器的研制。FLP的安全模式是指卫星软件或硬件出现严重异常,无法在星上自动处理和纠正,但卫星功能降低,仍能继续正常运行的状态。这种模式用于保证卫星的重要功能(如星上电源),同时在地面上分析故障。在安全模式下,卫星通过专用于这种情况的自主软件进行控制。用于该模式的传感器应反映高可靠性,并且传感器输出需要始终可用,但是在此模式中只需要粗略的指向知识。
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引用次数: 7
The design of Quantum-dot CellularAutomata decimal adder 量子点元胞自动机十进制加法器的设计
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777710
F. Kharbash, G. Chaudhry
Recently, there has been an increasing interest in hardware support for decimal arithmetic driven by the growing demands from financial and commercial applications. A crucial building block for decimal operations is the decimal adder. Thus, it is important to explore its design in future nanotechnologies. This work presents the first decimal adder design in quantum-dot cellular automata (QCA) nanotechnology using majority voting gates. The proposed one-digit QCA decimal full adder structure in this paper requires 27 majority voting gates and 16 inverters.
最近,由于金融和商业应用日益增长的需求,人们对十进制算法的硬件支持越来越感兴趣。十进制运算的一个重要组成部分是十进制加法器。因此,在未来的纳米技术中探索其设计是非常重要的。这项工作提出了量子点元胞自动机(QCA)纳米技术中使用多数投票门的第一个十进制加法器设计。本文提出的一位数QCA十进制全加法器结构需要27个多数投票门和16个逆变器。
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引用次数: 24
HUE: A hardware UCON engine for fine-grained continuous usage control HUE:用于细粒度连续使用控制的硬件UCON引擎
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777708
M. Nauman, T. Ali
Usage control is the field of security which deals with the issue of access decisions on a client platform which is outside the domain of the original owner. These issues include digital rights management, privacy issues and concepts such as content redistribution. UCON is a highly expressive usage control model, which significantly enhances traditional access control models through decision continuity and attribute mutability. Because of these enhancements, UCON is extremely difficult to implement in existing software paradigms. In this paper, we present the novel concept of a hardware-based UCON engine (HUE) which uses a single co-processor to facilitate the realization of UCON. We present an architectural model of the engine and define software requirements to effectively utilize this hardware in existing scenarios. We specify the requirements for such hardware and software and the facilities provided by our architecture. We also present detailed future directions in this area of research.
使用控制是安全领域,它处理在原始所有者的领域之外的客户机平台上的访问决策问题。这些问题包括数字版权管理、隐私问题和内容再分发等概念。UCON是一种具有高度表达能力的使用控制模型,它通过决策连续性和属性可变性对传统的访问控制模型进行了显著的改进。由于这些增强,UCON在现有的软件范例中很难实现。在本文中,我们提出了一个基于硬件的UCON引擎(HUE)的新概念,它使用单个协处理器来促进UCON的实现。我们提出了引擎的架构模型,并定义了在现有场景中有效利用该硬件的软件需求。我们指定了这些硬件和软件的要求以及我们的架构所提供的设施。我们还详细介绍了这一研究领域的未来方向。
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引用次数: 4
Modeling optimum ETSP protocol for WSN WSN最优ETSP协议建模
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777798
M. Shahzad
A fundamental design issue for wireless sensor network (WSN) protocols, applications and services is to introduce energy-efficiency to extend network lifetime. In this paper, we mathematically model and optimize our proposed energy-efficient time synchronization protocol (ETSP [21]) that provides significant energy improvements over compared time-synchronization protocols, namely reference broadcast synchronization (RBS [15]) and time-sync protocol for sensor networks (TPSN [16]). ETSP switches between RBS and TPSN based on the network density and improve over RBS and TPSN respectively. In the proposed protocol, we identify the conditions to switch between RBS and TPSN based on a threshold value of the number of neighbors at given node. We experimentally and mathematically derive an optimal value of the switching threshold for sensor motes hardware. It is shown that our proposed protocol results in reduced number of transmissions (message exchange) and is therefore, energy-efficient as compared to its existing counterparts. Moreover, we assess the performance of our protocol on the bit error traces collected over a WSN testbed to verify the analytical results.
无线传感器网络(WSN)协议、应用和服务的一个基本设计问题是引入能效以延长网络寿命。在本文中,我们对我们提出的节能时间同步协议(ETSP[21])进行了数学建模和优化,该协议比时间同步协议(即参考广播同步(RBS[15])和传感器网络时间同步协议(TPSN[16]))提供了显著的能源改进。ETSP根据网络密度在RBS和TPSN之间切换,并分别在RBS和TPSN的基础上进行改进。在提出的协议中,我们根据给定节点上邻居数量的阈值确定在RBS和TPSN之间切换的条件。我们通过实验和数学推导出传感器硬件开关阈值的最优值。结果表明,我们提出的协议减少了传输(消息交换)的数量,因此,与现有的协议相比,节能。此外,我们评估了我们的协议在WSN测试台上收集的误码跟踪上的性能,以验证分析结果。
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引用次数: 0
Joint ESPIRIT for time delay estimation of chirp spread spectrum 联合spirit用于啁啾扩频时延估计
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777795
Arjumand Yaqoob, J. Chong
In this paper we present a technique to estimate the time delay of IEEE 802.15.4a chirp spread spectrum (CSS). Conventionally, the time delay can be estimated by the phase estimation of the samples of a dechirped sinusoid. We estimate the phase differences not between samples in a sub-chirp but between samples of adjacent sub-chirps to magnify the phase differences making this technique more robust even in low SNR. We used joint ESPRIT technique in order to retain the phase information of each dechirped sinusoids in low and high bands. We have verified this technique through simulation and implementation.
本文提出了一种估计IEEE 802.15.a啁啾扩频(CSS)时延的方法。通常,时间延迟可以通过对解码正弦信号样本的相位估计来估计。我们估计的相位差不是在一个子啁啾的样本之间,而是相邻子啁啾的样本之间,以放大相位差,使该技术更稳健,即使在低信噪比。我们使用联合ESPRIT技术来保留每个解码正弦波在低频段和高频段的相位信息。我们已经通过仿真和实现验证了该技术。
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引用次数: 2
Cryptographic check values as Channel Coding redundancy 作为信道编码冗余的密码检查值
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777732
N. Zivic, O. Rehman
In this paper the method of Joint Channel Coding and Cryptography has been analyzed and simulated. Joint Channel Coding and Cryptography is an extension of Soft Input Decryption with feedback, which is used for improvement of channel decoding of secured messages. Results of simulations of Joint Channel Coding and Cryptography are compared to results of convolutional coding with the same coding rate. In this way, Joint Channel Coding and Cryptography brings coding gain of 0.72 dB, fulfilling security requirements at the same time.
本文对联合信道编码和密码方法进行了分析和仿真。联合信道编码与密码学是对带反馈的软输入解密的扩展,用于改进安全消息的信道解码。将联合信道编码和密码学的仿真结果与相同编码速率下卷积编码的仿真结果进行了比较。这样一来,联合信道编码和加密带来了0.72 dB的编码增益,同时满足了安全要求。
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引用次数: 0
A new single image interpolation technique for super resolution 一种新的超分辨率单幅图像插值技术
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777808
H. Aftab, A. Bin Mansoor, M. Asim
Interpolation is a technique for obtaining new unknown data points within the range of discrete known data points. In this paper we propose a new single image interpolation technique for Super resolution and demonstrate its effectiveness for aerial images. The proposed approach is a fast hybrid method of switching between covariance based interpolation technique and curvature based interpolation technique. The two interpolation techniques are applied on the basis of edges and smooth areas. The proposed algorithm has shown encouraging results in terms of visual quality and processing time.
插值是一种在离散的已知数据点范围内获得新的未知数据点的技术。本文提出了一种新的超分辨率单幅图像插值技术,并对其在航空图像上的有效性进行了验证。该方法是在基于协方差的插值技术和基于曲率的插值技术之间快速切换的混合方法。这两种插值方法都是基于边缘和光滑区域。该算法在视觉质量和处理时间方面取得了令人鼓舞的效果。
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引用次数: 16
Random noise suppression in fMRI time-series using modified spectral subtraction 改进谱减法抑制fMRI时间序列随机噪声
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777778
S. M. Monir, M. Siyal, H.K. Maheshweri
We present a novel method for random noise-suppression in functional magnetic resonance imaging (fMRI) time-series based on modified spectral subtraction. The method estimates the signal and noise models at every voxel in the functional data from a small neighborhood, without prior knowledge of the signal characteristics. Spectral subtraction is then performed to obtain a noise-suppressed power spectrum of the voxel under consideration. We demonstrate the performance of the proposed method by preprocessing synthetic as well as real fMRI data. The method is found to efficiently reduce random noise while preserving the deterministic components of the signal, thus, enhancing the sensitivity of the fMRI analysis.
提出了一种基于改进谱减法的功能磁共振成像(fMRI)时间序列随机噪声抑制方法。该方法在不需要事先知道信号特征的情况下,从小邻域估计功能数据中每个体素的信号和噪声模型。然后进行谱减法以获得所考虑的体素的噪声抑制功率谱。我们通过预处理合成和真实的fMRI数据来证明该方法的性能。该方法有效地降低了随机噪声,同时保留了信号的确定性成分,从而提高了fMRI分析的灵敏度。
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引用次数: 0
Wavelet based medical image compression through prediction 基于小波预测的医学图像压缩
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777727
Muhammad Younus, Muhammad Habib Khan, Yao-Tien Chen
This paper offers a simple and lossless compression method for compression of medical images. Method is based on wavelet decomposition of the medical images followed by the correlation analysis of coefficients. The correlation analyses are the basis of prediction equation for each sub band. Predictor variable selection is performed through coefficient graphic method to avoid multicollinearity problem and to achieve high prediction accuracy and compression rate. The method is applied on MRI and CT images. Results show that the proposed approach gives a high compression rate for MRI and CT images comparing with state of the art methods.
本文提出了一种简单、无损的医学图像压缩方法。该方法首先对医学图像进行小波分解,然后进行相关系数分析。相关分析是各子带预测方程的基础。通过系数图法选择预测变量,避免了多重共线性问题,实现了较高的预测精度和压缩率。将该方法应用于MRI和CT图像。结果表明,与现有方法相比,该方法对MRI和CT图像具有较高的压缩率。
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引用次数: 9
QuaD2 - an ontology-based framework for quality driven design of architectures QuaD2——一个基于本体的框架,用于质量驱动的架构设计
Pub Date : 2008-12-01 DOI: 10.1109/INMIC.2008.4777760
M. Kunz, A. Farooq, S. Mencke, R. Dumke
The importance of providing integration architectures in every field of application is beyond controversy these days. Unfortunately existing solutions are focusing mainly on functionality. But for the success of systems integration in the long run, the quality of developed architectures is of substantial interest. Therefore a framework for quality-driven creation of architectures is proposed in this paper. Besides these quality-oriented characteristic, the usage of semantic knowledge and structured process descriptions enable an automatic procedure. Especially the combination of both is a promising approach.
如今,在每个应用领域提供集成体系结构的重要性是无可争议的。不幸的是,现有的解决方案主要关注于功能。但是从长远来看,对于系统集成的成功,开发的体系结构的质量是非常重要的。因此,本文提出了一个质量驱动的架构创建框架。除了这些面向质量的特征外,语义知识和结构化过程描述的使用使过程自动化成为可能。特别是两者的结合是一种很有前途的方法。
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引用次数: 1
期刊
2008 IEEE International Multitopic Conference
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