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检索条件"机构=Computer and Embedded System Laboratory"

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Optimized image recognition based sewing pattern file auto-generating method for intelligent industrial equipments

Optimized image recognition based sewing pattern file auto-g...

引用

2012 IEEE/ACIS 11th International Conference on computer and Information Science, ICIS 2012

作者： Su, Erfeng Zhang, Kailong Zhou, Xingshe School of Computer Northwestern Polytechnical University Xi'an China Shaanxi Key Laboratory of Embedded System Technology Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9780769546940

The development of embedded system (ES) promotes the trend that the numerical-control equipment becomes more networked and intelligent. ES is the kernal of network and intelligence, yet the image data with contained information is the key point to realize high antomatization and intelligence of ES. The overall automatization level of industrial equipment becomes higher than before. However, in some basic industries, such as the sewing industry, the automatization is backward. This paper analyzes the working mechanism of current pattern-designing software and concludes that the system input is complicated, and the usability and automatization is low. To deal with the problem, the paper proposes a sewing pattern generating method based on optimized image recognition. This method is data-driven, which includes image calibration, edge detecting and curve fitting to simplify the system input. A new algorithm is designed to transfer the system input from vectors to scalars, or to accept both of them, which improves the system's scalability and usability. Corresponding software is developed and the results show that it is more reliable, and it can satisfy the industrial requirements in an acceptable degree. © 2012 IEEE.

关键词： Curve fitting

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A 3rd order opamp-based tunable low-pass filter design for data demodulator of a 5.8 GHz ETC RF receiver

A 3rd order opamp-based tunable low-pass filter design for d...

引用

International Conference on computer, Informatics, Cybernetics and Applications 2011, CICA 2011

作者： Li, Yan Yu, Hang Lin, Shengyue Jiang, Lai Wei, Rongchen Ji, Zhen Shenzhen City Key Laboratory of Embedded System Design College of Computer Science and Software Engineering Shenzhen University Shenzhen Guangdong 518060 China

ISBN: (纸本)9789400718388

Electronic tolling collection (ETC) will be applied in the construction of the new national highway network in China and the Chinese standard has been released. A 5.8 GHz receiver satisfied the standard is one of the key components in the ETC system. In this work, a 3rd order low-pass filter was designed in a 0.18 μm CMOS process for the data demodulation block of the receiver. An operational amplifier was firstly realized and then a tunable low pass filter was designed based on the amplifier. Detailed simulation results are presented and the main design issues were discussed. © 2012 Springer Science+Business Media B.V.

关键词： Operational amplifiers

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A low power limiting amplifier designed for the RSSI of a 5.8 GHz ETC receiver

A low power limiting amplifier designed for the RSSI of a 5....

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International Conference on computer, Informatics, Cybernetics and Applications 2011, CICA 2011

作者： Yu, Hang Li, Yan Wei, Wongchen Jiang, Lai Lin, Shengyue Ji, Zhen Shenzhen City Key Laboratory of Embedded System Design College of Computer Science and Software Engineering Shenzhen University Shenzhen Guangdong 518060 China

ISBN: (纸本)9789400718388

A low power limiting amplifier designed for received signal strength indicator of a 5.8 GHz ETC receiver is presented in this chapter. systematic analysis is carried out first to determine the optimal number of gain stages and the gain-bandwidth product of each stage. Then the detailed circuit design is discussed. The limiting amplifier consists of twelve AC-coupled gain stages, and is implemented using the standard CMOS 0.18 μm technology. The design is validated under Zeni design environment, and the simulation results show that the limiting amplifier achieves overall small signal gain of 98 dB, with 22 MHz bandwidth. Powered by a 1.8 V DC supply voltage, the total power consumption of the limiting amplifier is only 5.5 mW. © 2012 Springer Science+Business Media B.V.

关键词： Bandwidth

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A new universal-environment adaptive multiprocessor scheduler for autonomous cyber-physical system

A new universal-environment adaptive multiprocessor schedule...

引用

2012 IEEE/ACIS 11th International Conference on computer and Information Science, ICIS 2012

作者： Zhang, Kailong Yao, Yuan Lu, Zhou Wu, Xiao Labanni, Ouassila School of Computer Northwestern Polytechnical University Xi'an China Laboratory of Electron Information and Image University of Burgundy Dijon France Shaanxi Key Laboratory of Embedded System Technology Northwestern Polytechnical University Xi'an China

ISBN: (纸本)9780769546940

Robot, spaceship and other applications that can be called autonomous Cyber-Physical systems (CPS) are all smart embedded systems, which usually run in open environment by themselves with inhered intelligent capabilities. Besides the application intelligence, the researches of adaptive platform for such systems have also become topics recently. Based on the analysis of current work, a new environment adaptive scheduler (α-S) for multiprocessor platform of a cyber-physical system is proposed in this article. And then, its related structures, models, and reasoning methods are studied deeply. Different from the existing ones, α-S can schedule all tasks according to the environment change by two layered functions. The upper one uses not only the properties of a task but also the state of environment and system resources as input variables, which is defined as Universal Environment (UE), and then calculates the Quality of Scheduling of all tasks with a customized fuzzy logic. The lower one allocates these tasks onto processors automatically under the dynamic performance evaluation of computing resources, such as load and success rate of each processor. Further, some allocation policies are studied and defined to make α-S be more flexible to adapt different requirements. Finally, studied methods are simulated and then experimented on an obstacle-avoiding robot system. © 2012 IEEE.

关键词： Fuzzy logic

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Design issues in ZigBee-based sensor network for healthcare applications

Design issues in ZigBee-based sensor network for healthcare ...

引用

2012 9th IEEE International Conference on Networking, Sensing and Control, ICNSC 2012

作者： Choi, Jin Soo Zhou, MengChu Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ 07102 United States Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

ISBN: (纸本)9781467303880

IEEE 802.15.4/ZigBee sensor networks support small power consumption and node expansion compared to other network standards for WSN. Body sensor networks (BSN) require a number of sensors for sensing medical information from human body, and low power consumption to monitor a patient's status for a long time. However, ZigBee has limited bandwidth and is thus hard to support real time data transmission because of the adoption of CSMA-CA as its medium access control (MAC) protocol. In this paper, we will analyze the reasonable number of nodes, size of payload and packet interval for best QoS for such network. It is found that an appropriate MAC parameters setting can improve the QoS compared to the default setting in IEEE 802.15.4 specification. The effective data rate, average end-to-end delay and packet delivery ratio are found via simulation for various network settings. The results are useful for the construction of ZigBee networks for patient monitoring and care. © 2012 IEEE.

关键词： Medium access control

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Lattice-based risk models for workflows in multi-domain environments

Lattice-based risk models for workflows in multi-domain envi...

引用

International Conference on Advanced Communication Technology (ICACT)

作者： Lu Tang Zhuo Tang Renfa Li School of Computer and Communication Embedded System & Networking Laboratory Hunan University Changsha China

In multi-domain environments, the risk of access policy for workflows is influenced by many factors, and it is difficult to calculate the accurate value of risk combining these factors. But choosing an access policy does not need to know the specific value of risk, only to know the partial order of risks. This paper introduces the concept of risk, proves that the partial order of risks is a lattice, which can ensure implementation of the multi-level security policy. And the risk of access policy can be compared using the lattice effectively. Then, according to it, this paper proposes an algorithm to determine the access policy. It can reinforce the security of workflow systems in multi-domain environments.

关键词： Authorization Lattices Computational modeling computers Educational institutions

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A novel approach to modelling protein-protein interaction networks

A novel approach to modelling protein-protein interaction ne...

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3rd International Conference on Swarm Intelligence, ICSI 2012

作者： You, Zhuhong Lei, Yingke Ji, Zhen Zhu, Zexuan Shenzhen City Key Laboratory of Embedded System Design College of Computer Science and Software Engineering Shenzhen University Shenzhen 518060 China Department of Information Electronic Engineering Institute Hefei Anhui 230027 China

ISBN: (纸本)9783642310195

Finding an accurate network null model for protein-protein interactions (PPI) networks is an important and fundamental problem in today's systems biology. A number of graph models were introduced to model and analyze PPI networks. However, because the previous network models were developed to capture specific network properties or just mimic the way that real PPI network might have evolved, the whole connectivity information of PPI networks is not utilized to learn the topological structure of the networks. In this paper we propose a novel model for PPI networks which is based on geometric random graphs and employs the entire connectivity information of PPI networks to learn its structure. The computational experiments show the superiority of the fit of our method over five other network models to PPI data. Thus, the proposed network null model could facilitate further graph-based studies of protein-protein interactions and may help infer their hidden underlying biological knowledge. © 2012 Springer-Verlag.

关键词： Proteins

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A coevolutionary memetic particle swarm optimizer

A coevolutionary memetic particle swarm optimizer

引用

3rd International Conference on Swarm Intelligence, ICSI 2012

作者： Zhou, Jiarui Ji, Zhen Zhu, Zexuan Chen, Siping College of Biomedical Engineering and Instrument Science Zhejiang University Hangzhou 310027 China Shenzhen City Key Laboratory of Embedded System Design College of Computer Science and Software Engineering Shenzhen University Shenzhen 518060 China

ISBN: (纸本)9783642309755

This paper presents a coevolutionary memetic particle swarm optimizer (CMPSO) for the global optimization of numerical functions. CMPSO simplifies the update rules of the global evolution and utilizes five different effective local search strategies for individual improvement. The combination of the local search strategy and its corresponding computational budget is defined as coevolutionary meme (CM). CMPSO co-evolves both CMs and a single particle position recording the historical best solution that is optimized by the CMs in each generation. The experimental results on 7 unimodal and 22 multimodal benchmark functions demonstrate that CMPSO obtains better performance than other representative state-of-the-art PSO variances. Particularly, CMPSO is shown to have higher convergence speed. © 2012 Springer-Verlag.

关键词： Global optimization

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A HW/SW implementation on FPGA of a robot localization algorithm

A HW/SW implementation on FPGA of a robot localization algor...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： Agnès Ghorbel Nader Ben Amor Mohamed Jallouli Lobna Amouri Computer & Embedded System Laboratory Engineering School of Sfax (ENIS) University of Sfax Sfax Tunisia

ISBN: (纸本)9781467315906

This paper presents an implementation of robot localization algorithm using FPGA technology. The adopted localization method uses webcam tracking images. This technique has been developed and implemented for the motion of the robot from an initial position towards another desired position. Firstly, we have validated our approach on PC platform using C language and OpenCV library. Secondly, for the autonomous navigation, a mixed HW/SW implementation was been developed using a high performance version of the NIOS processor coupled with a hardware accelerator. Experimental tests on Altera Cyclone III FPGA Starter Kit proved the effectiveness of the proposed architecture.

关键词： Robot kinematics Field programmable gate arrays Robot sensing systems Mobile robots Transforms Gray-scale

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A novel miniature four-band CPW-fed antenna optimized using ISPO algorithm

A novel miniature four-band CPW-fed antenna optimized using ...

引用

6th International ICST Conference on Wireless Internet, WICON 2011

作者： Li, Huihui Mou, Xuanqin Ji, Zhen Yu, Hang Li, Yan Jiang, Lai School of Electronics and Information Engineering Xi'an Jiaotong University Xi'an 710049 China College of Computer Science and Software Engineering Shenzhen University Shenzhen 518060 China Shenzhen Key Laboratory of Embedded System Design Shenzhen China

ISBN: (纸本)9783642304927

A novel four-band CPW-fed antenna simultaneously satisfied the requirement for Radio Frequency Identification (RFID) tag and WiMAX /WLAN applications is reported in this paper. Limited to 30×30 mm2 area on a PCBoard with Ε r=4.4, the antenna has four U-shaped, two F-shaped and eight L-shaped slots as additional resonators to achieve multi-band operation. Intelligent Single Particle Optimization (ISPO) algorithm is used to determine the optimized slot configuration for the best return loss at 0.96 GHz, 2.5 GHz, 3.76 GHz and 5.8 GHz simultaneously. The performance of the designed antenna was validated through simulations using both the Finite Element Method and the Method of Moment. © 2012 ICST Institute for computer Science, Social Informatics and Telecommunications Engineering.

关键词： Method of moments

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