检索结果-内蒙古大学图书馆

A novel discrete particle swarm optimization algorithm for meta-task assignment in heterogeneous computing systems

Microprocessors and Microsystems 2011年第1期35卷 10-17页

作者： Qinma Kang Hong He The Key Laboratory of “Embedded System and Service Computing” Ministry of Education Tongji University Shanghai 201804 PR China School of Information Engineering Shandong University at Weihai Weihai 264209 PR China

Optimal assignment of a meta-task in heterogeneous computing systems is NP-complete in the general case. Therefore, heuristic approaches must be employed to find good solutions within a reasonable time. We propose a novel discrete particle swarm optimization (DPSO) algorithm for this problem. Firstly, to make particle swarm optimization algorithm more suitable for solving task assignment problems, particles are represented as integer vectors and a new position update method is developed based on discrete domain. Secondly, an effective variable neighborhood descent algorithm is applied to emphasize exploitation. In addition, migration mechanism is introduced with the hope to escape from possible local optimum and to balance the exploration and exploitation. Computational simulations and comparisons based on a set of benchmark instances indicate that the proposed DPSO algorithm is a viable approach for the task assignment problem.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Detecting vehicle target in SAR image with high moment

Detecting vehicle target in SAR image with high moment

引用

International Radar Symposium (IRS)

作者： Renzhou Gui Zhi Wang State Key Laboratory of Satellite Ocean Environment Dynamics The Key Laboratory of Embedded System and Service Computing Ministry of Eduction College of Electronics & Information Engineering Tongji University Shanghai China

Vehicle detection in SAR image is attractive field. High moments included numerous information is proposed to exploit in the field. It not only restrains Gaussian noise automatically, but also suppresses non-gaussian noise. Man-made targets in are different from the background clutter. Moreover, the influence of the shadow about man-made targets is reduced in the algorithm of high moments. We utilize high moments to avoid to analyst the complex scatter theory. By analyzing the relevent theory and practical calculated method of high order moments, we compare the difference of probability of detection between the target chip and clutter chip to achieve the goal of detection. Through processing lots of actual SAR data which is added different kinds of noise, we compare the performance between high order moments and low-order moments method.

关键词： Noise Vehicles Clutter Probability density function Object detection Graphics Moment methods

来源：评论

学校读者我要写书评

暂无评论

Modeling and analysis of dual-arm cluster tools for wafer fabrication with revisiting

Modeling and analysis of dual-arm cluster tools for wafer fa...

引用

2011 7th IEEE International Conference on Automation Science and Engineering, CASE 2011

作者： Qiao, Yan Wu, NaiQi Zhou, MengChu Department of Industrial Engineering School of Mechatronics Engineering Guangdong University of Technology Guangzhou 510006 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102-1982 United States

ISBN: (纸本)9781457717307

Some wafer fabrication processes are repeated processes, e.g. atomic layer deposition (ALD) process. For such processes, the wafers need to visit some processing modules for a number of times, which complicates the cycle time analysis. This paper studies the cycle time analysis problem for such processes. With a Petri net model, it is found that such processes contain local cycles involving only the revisiting PMs and global cycles involving both revisiting and non-revisiting PMs. The process switches between these two types of cycles such that the process never reaches a steady state. Based on this finding, the mechanism underlying such processes is revealed and analytical expressions are given for the calculation of their cycle time. Illustrative examples are presented to show the application of the proposed approach. © 2011 IEEE.

关键词： Atomic layer deposition

来源：评论

学校读者我要写书评

暂无评论

Fast adaptive interpolation filter algorithm for bi-predicted frame in video coding

Fast adaptive interpolation filter algorithm for bi-predicte...

引用

International Conference on Multimedia Technology

作者： Huichao Gao Feng Cen Weisheng Xu Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji Shanghai China College of Electronics and Information Engineering University of Tongji Shanghai China

ISBN: (纸本)9781612847719

This paper proposes a novel adaptive interpolation filter (AIF) to reduce computational complexity and bit-rate of video coding. In the proposed AIF, the filter coefficients of B frames, which are predicted from those of adjacent P frames with a novel parabolic model, are unnecessary to transmit. Experimental results show that the coding complexity is reduced by 40.22% with no penalty on coding efficiency and 1.59% bit rate reduction is achieved at low bit-rate against conventional AIF.

关键词： Interpolation Wiener filter Adaptive filters Encoding Information filters Complexity theory

来源：评论

学校读者我要写书评

暂无评论

Recent advances of sensors for pacemakers

Recent advances of sensors for pacemakers

引用

IEEE International Conference on Networking, Sensing and Control

作者： Wei Vivien Shi MengChu Zhou ECE Department New Jersey Institute of Technology Newark NJ USA Key Laboratory of MoE for Embedded System and Service Computing University of Tongji Shanghai China

In this paper, the recent advances of sensors incorporated in pacemakers are presented. Based on the functions and operations of modern pacemakers, a variety of sensors are described with their rationales, features and applications. Further improvements and future trend of body sensors are pointed out. The comparison of the sensors' features is performed.

关键词： Sensors Pacemakers Heart rate Ventilation Acceleration Accelerometers Biomedical monitoring

来源：评论

学校读者我要写书评

暂无评论

Asymptotic bounds on lifetime of large scale clustering UWB sensor network

引用

Tien Tzu Hsueh Pao/Acta Electronica Sinica 2011年第10期39卷 2263-2268+2281页

作者： Xu, Juan Fang, Yu Xu, Hua-Jie School of Electronics and Information Engineering Tongji University Shanghai 200092 China Key Laboratory of Embedded System and Service Computing of the Ministry of Education Tongji University Shanghai 200092 China School of Computer and Electronic Information Guangxi University Nanning Guangxi 530004 China

Considering time hopping impulse radio ultra wide band (TH-IR UWB) sensor networks composed n sensor nodes which are placed according to a Poisson point process on a square and a Sink. The results demonstrate that the bounds on the lifetime of dense network increase with the increase of the number of nodes n, and that of extended network decrease with the increase of the number of nodes n. The results also indicate the bounds on the lifetime of clustering sensor networks is far more than that of non-clustering network, thus clustering can evidently improve network lifetime. Furthermore, the bounds on the lifetime of clustering TH-IR UWB sensor network which the nodes are distributed according to a Poisson point process are different from that of clustering network which the nodes are placed according to uniform distribution, thus the behavior of nodes deploying can remarkably affect the lifetime bound.

关键词： Energy dissipation

来源：评论

学校读者我要写书评

暂无评论

Adaptive social network construction using Gaussian mixture model

引用

Information Technology Journal 2011年第12期10卷 2252-2259页

作者： Guo, Xin Xiang, Yang Chen, Qian Wei, Wei Department of Computer Science and Technology School of Electronic and Information Engineering Tongji University Shanghai 201804 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

A Social network graph shows social interactions and relationships between individuals in a specific social environment, which is very helpful for analyzing social relationships, activities, structures, etc. The author quantized the strengths of social objects' relationships in social environment using an improved vector space model. Gaussian mixture model was employed to set the threshold for identifying social relationships adaptively and divide social subgroups automatically. According to the threshold, social network graph would be constructed based on performance measures. It is concluded that hidden social relationships can be discovered effectively by using this approach which is very flexible and adaptive for dynamic information feedback mechanism. © 2011 Asian Network for Scientific Information.

关键词： Gaussian distribution

来源：评论

学校读者我要写书评

暂无评论

StressBar: A system for stress information collection 11

StressBar: A system for stress information collection

引用

2nd Wireless Health Conference, WH'11

作者： Lu, Dajun Zhan, Guoxing Wang, Shinan Shi, Weisong Wiholm, Clairy Arnetz, Bengt B. Dept. of Computer Science Wayne State University United States Dept. of Public Health and Caring Sciences Uppsala University Sweden Dept. of Family Medicine and Public Health Sciences Wayne State University Detroit MI United States Key Laboratory of Embedded System and Service Computing Tongji University Shanghai China

ISBN: (纸本)9781450309820

The causes of stress and how it affects our behaviors are generally not well understood. The stress research usually requires a large amount of data to analyze possible stress-related factors. The data collection process traditionally is time-consuming and cost-ineffective. To help medical researchers collect the stress information, we propose a tool named StressBar utilizing the powerful data collection capacity of smart phones. In this paper, we will show our design and implementation considerations of StressBar. Copyright 2011 ACM.

关键词： Smartphones

来源：评论

学校读者我要写书评

暂无评论

An ultrasound system for tumor detection in soft tissues using low transient pulse

An ultrasound system for tumor detection in soft tissues usi...

引用

IEEE International Conference on Automation Science and Engineering (CASE)

作者： Ashish R. Ratnakar MengChu Zhou Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA MoE Key Laboratory of Embedded System and Service Computing Tongji University Shanghai China

This work presents a method to detect the size and location of tumor in soft tissues using ultrasound. Quantitative ultrasound is utilized to allow an ultrasound signal to be sent from a transmitter to multiple receivers. This received signal is analyzed for echogenic and echolucent tumors to differentiate between the two along with non-tumor sample and also studied for the delay to determine the size/location of the tumor. The proposed system utilizes Low Transient Pulse (LTP) technique and is implemented using Field Programmable Gate Array (FPGA) and Digital Signal Processor (DSP) technologies. In this co-design architecture, DSP carries out the analysis of received demodulated signal at a lower speed while FPGA runs at a higher one to generate LTP signal and demodulate bandpass ultrasonic signal. This work elaborates the implementation of Quadrature Amplitude Modulation (QAM) receiver on FPGA for the received signal from an ultrasound detector. LTP is applied to the tumor samples through the transmitter and the received signal at an ultrasonic receiver is passed through QAM to obtain different maxima that are then further used to compute the location and the size of the tumor using DSP. This dual platform co-design demonstrates a good application of a FPGA/DSP platform for the LTP generation and received signal processing.

关键词： Digital signal processing Field programmable gate arrays Tumors Ultrasonic imaging Clocks Quadrature amplitude modulation Receivers

来源：评论

学校读者我要写书评

暂无评论

Improved condition for controllability of strongly dependent strict minimal siphons in Petri nets

Improved condition for controllability of strongly dependent...

引用

IEEE International Conference on Networking, Sensing and Control

作者： GuanJun Liu ChangJun Jiang MengChu Zhou Key Laboratory of the MoE for Embedded System and Service Computing University of Tongji Shanghai China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA

Li and Zhou propose an important concept for Petri nets: elementary siphons. They partition siphons into elementary and dependent ones. The controllability of the latter can be ensured by the former's proper control. They give a sufficient condition to decide whether a dependent siphon is controlled by its elementary ones in S 3 PR. However, this condition is so loose that in many cases the controllability of a dependent SMS cannot be determined although it is actually controlled. In this paper, we propose an improved condition to decide the controllability of strongly dependent SMS.

关键词： Controllability system recovery Nickel Flexible manufacturing systems Petri nets Sufficient conditions Control theory

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：