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第二十六届中国控制会议

作者： Han Soohee Kwon Wook Hyun BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems Seoul Nat'l Univ.Seoul151-742Korea School of Electrical Engr.& Computer Science Seoul Nat'l Univ.Seoul151-742Korea

This paper proposes robust finite impulse response(FIR)filters for linear continuous-time state space models with bounded uncertainties.A set of all reachable current states under bounded uncertainties is determined from inputs and outputs on a recent finite time *** some condition is met,this set is shown to be represented in an ellipsoidal *** derivation procedure is much simplified by utilizing the result on the optimal tracking control with an indefinite cost *** order to minimize the maximum estimation error due to uncertainties,the center of the reachable ellipsoidal set is chosen as an estimated *** is shown through simulation that the proposed robust FIR filter achieves a more robust performance than existing robust infinite impulse response(IIR)filters.

关键词： Robust filter,FIR filter,Uncertain systems,Reachable set,Robust observability

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A Quantitative Analysis of Power Consumption for Location-Aware Applications on Smart Phones

A Quantitative Analysis of Power Consumption for Location-Aw...

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2007 IEEE International Symposium on Industrial Electronics (ISIE 2007), vol.5

作者： Arjun Anand Constantine Manikopoulos Quentin Jones Cristian Borcea Departments of Computer Science New Jersey Institute of Technology Newark NJ USA Departments of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA Departments of Information Systems New Jersey Institute of Technology Newark NJ USA

The industry is producing new wireless mobile devices, such as smart phones, at an ever increasing pace. In terms of processors and memory, these devices are as powerful as the PCs were one decade ago. Therefore, they are perfectly suitable to become the first real-life platforms for ubiquitous computing. For instance, they can be programmed to run location-aware applications that provide people with real-time information relevant to their current places. Deploying such applications in our daily life, however, requires a good understanding of their power requirements in order to ensure that mobile devices can indeed support them. This paper presents a quantitative analysis of power consumption for location-aware applications in our SmartCampus project, which builds a large scale test-bed for mobile social computing. Based on this analysis, we conclude that carefully designed applications can run for up to six hours, while updating the user location frequently enough to support real-time location-aware communication.

关键词： Energy consumption Smart phones Application software Mobile computing Ubiquitous computing Testing Mobile communication computer industry Bluetooth Batteries

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Voice Transmission Enhancing Model on Wireless Mesh Networks

Voice Transmission Enhancing Model on Wireless Mesh Networks

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IEEE International Conference on Communications (ICC)

作者： S. Jung S. Hong K. Kim J. Jee E. Kim Dept. of Electrical and Computer Engineering Mobile Systems Design Laboratory Stony Brook University Suny Stony Brook NY Mobile Communication Standardization Research Team Electronics and Telecommunications Research Institute Daejeon South Korea Mobile Communication Standardization Research Team Electronics and Telecommunications Research Institute Daejeon KOREA

This paper initially shows ROHC and packet aggregation significantly improve the number of successful voice calls. However, the improvement does not include processor's processing overhead, which is identified by measuring ROHC processing time from Intel Pentium 4 and RouterBOARD, and applying the results into NS-2 simulations. Simulation results indicate the number of successful voice calls is seriously affected by the processing overhead. For the solution of the processing limitation, we propose a hardware model of the two algorithms and numerically analyze the model. Simulation results show the hardware model makes the number of successful voice calls approach the ideal (no-delay) case, and the numerical model exactly characterizes the hardware behaviors.

关键词： Wireless mesh networks Numerical models Propagation losses Robustness Hardware design languages Time measurement Power system modeling Traffic control Telecommunication traffic Spread spectrum communication

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Accurate Capacitance Extraction in the Entire Package Model Using A Parallel Kernel Independent Hierarchical Extractor

Accurate Capacitance Extraction in the Entire Package Model ...

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2007 IEEE Workshop on Signal Propagation on Interconnects (SPI 2007)

作者： Khalid Butt Ian Jeffrey Mohammed Al-Qedra Feng Ling Vladimir Okhmatovski Department of Electrical and Computer Engineering University of Manitoba Winnipeg Canada Department of Advanced R&D Cadence Design Systems Inc. Tempe USA

In this paper we discuss a computational framework which allows for accuracy controlled capacitance extraction in the entire package model consisting of 2.9 million elements on the conductor boundaries. The capacity for simulation of large-scale interconnects is attained through parallel implementation of a tree-based hierarchical computational algorithm. The acceleration of dense matrix-vector product resulting from the Locally Corrected Nystrom (LCN) discretization of the governing integral equation is effected by means of the Barnes-Hut (BH) method. The kernel-independence of the latter provides for inclusion of the dielectric substrate into the computational model without increasing the model's size by means of creation of the pertinent Green's function databases for the substrate process.

关键词： Capacitance Packaging Kernel Computational modeling Dielectric substrates Conductors Concurrent computing Acceleration Integral equations Green's function methods

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A receding horizon Kalman filter with the estimated initial state on the horizon

A receding horizon Kalman filter with the estimated initial ...

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2007 International Conference on Control, Automation and systems (ICCAS 2007), vol.2

作者： Bo Kyu Kwon Soohee Han Hosang Lee Wook Hyun Kwon The School of Electrical Engineering & Computer Science Seoul National University Seoul South Korea The BK 21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems Seoul National University Seoul South Korea

In this paper, we propose a discrete-time receding horizon Kalman filter with the estimated initial state on the horizon. The proposed filter employs the conventional Kalman filter with the receding horizon strategy. The initial state on the horizon is estimated from a maximum likelihood criterion and then initiates the Kalman filter. It turns out that the proposed filter is independent of any a priori information on the state over the horizon while the previous filters assume that the stochastic information on the initial state at the starting time is available. The proposed filter is shown to have the same form as an optimal FIR filter, which leads to having the optimality and the unbiasedness.

关键词： Receding horizon strategy Kalman filter Estimated initial state Maximum likelihood criterion

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designing an embedded video processing camera using a 16-bit microprocessor for a surveillance system

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Journal of VLSI Signal Processing systems for Signal, Image, and Video Technology 2006年第1期42卷 57-68页

作者： Sato, Koichi Evans, Brian L. Aggarwal, J.K. Department of Electrical and Computer Engineering Computer and Vision Research Center University of Texas at Austin Austin TX 78712 United States Department of Electrical and Computer Engineering Embedded Signal Processing Laboratory University of Texas at Austin Austin TX 78712 United States Department of Electrical and Computer Engineering University of Texas Austin Design and Implementation of Signal Processing Systems Technical Committee IEEE Signal Processing Society IEEE Department of Electrical and Computer Engineering Computer and Vision Research Center IEEE Computer Society

This paper describes the design and implementation of a hybrid intelligent surveillance system that consists of an embedded system and a personal computer (PC)-based system. The embedded system performs some of the image processing tasks and sends the processed data to the PC. The PC tracks persons and recognizes two-person interactions by using a grayscale side view image sequence captured by a stationary camera. Based on our previous research, we explored the optimum division of tasks between the embedded system and the PC, simulated the embedded system using dataflow models in Ptolemy, and prototyped the embedded system in real-time hardware and software using a 16-bit CISC microprocessor. This embedded system processes one 320 × 240 frame in 89 ms, which yields one-third of the rate of 30 Hz video system. In addition, the real-time embedded system prototype uses 5.7 K bytes of program memory, 854 K bytes of internal data memory and 2 M bytes external DRAM. © Springer Science + Business Media, Inc. 2006.

关键词： Microprocessor chips

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AN EFFECTIVE MULTIPLE CRITERIA APPROACH TO INFRASTRUCTURE RECONSTRUCTION IN DEVASTATED COUNTRIES

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Journal of systems Science and systems engineering 2006年第2期15卷 232-246页

作者： K.A.NIGIM K.W.HIPEL G.B.SMITH Department of Electrical and Computer Engineering University of WaterlooWaterlooOntario Canada. Department of Systems Design Engineering University of WaterlooWaterlooOntario Canada International Business Development MesaArizonaUSA

Infrastructure facilities in many countries have been repeatedly subjected to natural or human-induced disasters. International aid institutions, such as the United Nations Development Program （UNDP）, United States Aid International Development （USAID）, Japan International Cooperation Agency （JICA） and the World Bank International Aid Development （IDA）, are endeavoring to assist in the reconstruction of devastated countries. Development institutions normally face the problem of selecting and implementing relevant priority infrastructure projects that are needed in various sectors. Usually there are also several key local players in the decision making process. In many cases, these main decision makers have contradictory objectives that lead to conflict and thereby hamper the reconstruction process. In response to this kind of problem, an effective approach has been developed within the field of Multiple Criteria Decision Analysis （MCDA）, the Analytical Hierarchy Process （AHP）, that can assist decision makers in prioritizing projects to meet specified goals and objectives. Using the AHP approach, the problem of selecting infrastructure projects is dealt with systematically when applying this flexible MCDA technique. This approach takes into account possible uncertainties and social discrepancies, and can use the judgments of the decision makers themselves when there is a lack of technical or historical data. Decision makers from international financial aid institutions, donor agencies, governmental and the local community can utilize this proposed approach.

关键词： Analytical Hierarchy Process （AHP） conflicts infrastructure reconstruction multi-criteriadecision analysis （MCDA）

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Compatible phase co-scheduling on a CMP of multi-threaded processors 20

Compatible phase co-scheduling on a CMP of multi-threaded pr...

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20th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2006

作者： El-Moursy, Ali Garg, Rajeev Albonesi, David H. Dwarkadas, Sandhya Departments of Electrical and Computer Engineering and of Computer Science University of Rochester United States Computer Systems Laboratory Cornell University United States

ISBN: (纸本)1424400546

The industry is rapidly moving towards the adoption of Chip Multi-Processors (CMPs) of Simultaneous Multi-Threaded (SMT) cores for general purpose systems. The most prominent use of such processors, at least in the near term, will be as job servers running multiple independent threads on the different contexts of the various SMT cores. In such an environment, the co-scheduling of phases from different threads plays a significant role in the overall throughput. Less throughput is achieved when phases from different threads that conflict for particular hardware resources are scheduled together, compared with the situation where compatible phases are co-scheduled on the same SMT core. Achieving the latter requires precise per-phase hardware statistics that the scheduler can use to rapidly identify possible incompatibilities among phases of different threads, thereby avoiding the potentially high performance cost of inter-thread contention. In this paper, we devise phase co-scheduling policies for a dual-core CMP of dual-threaded SMT processors. We explore a number of approaches and find that the use of ready and in-flight instruction metrics permits effective co-scheduling of compatible phases among the four contexts. This approach significantly outperforms the worst static grouping of threads, and very closely matches the best static grouping, even outperforming it by as much as 7%. © 2006 IEEE.

关键词： Multiprocessing systems

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A closed-form analytical model for single nanoshells

A closed-form analytical model for single nanoshells

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作者： Alam, Mehboob Massoud, Yehia IEEE Electrical and Computer Engineering Department Rice University Houston TX 77005 United States Rice Automated Nanoscale Design Group Rice University Houston TX Departments of Electrical and Computer Engineering and Computer Science

In this paper, we develop an accurate analytical closed-form model for the frequency resonance and scattering characteristics of single nanoshells. Nanoshells, dielectric spheres that are coated with noble metal, posses excellent tunability of their resonance frequency as a function of the relative sizes of the core and the thickness of the shell. Consequently, nanoshells offer much improved sensitivity, specificity, and cost-effectiveness in their applications. Simulation results show that our new closed-form model matches very closely with the exact solution for typical nanoshell configurations used in near-infrared applications. © 2006 IEEE.

关键词： Nanostructured materials

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Automotive electronics: Steady growth for years to come!

Automotive electronics: Steady growth for years to come!

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ASP-DAC 2006: Asia and South Pacific design Automation Conference 2006

作者： Sangiovanni-Vincentelli, Alberto Department of Electrical Engineering and Computer Science University of California Berkeley United States Cadence Design Systems United States

No abstract available

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