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检索条件"任意字段=International Conference on Advances in Computing, Communication Control and Networking"

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A Combined Fair Scheduling Algorithm for Combined-Input-Crosspoint-Queued Switch

A Combined Fair Scheduling Algorithm for Combined-Input-Cros...

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Ning Xu Shaohua Yu Xueshun Wang Department of Computer Science Huazhong University of Science and Technology Wuhan China

In this paper, we discuss that both high performance and max-min fair scheduling is necessary for a QoS-awared scheduling algorithm for Combined Input-Crosspoint-Queued switch and present a new scheduling algorithm called Combined Max-Min Fair Scheduling (CMMFS) scheme. Simulation shows that this algorithm can achieve high performance under the uniform and non-uniform traffic pattern and Fairness of scheduling is also verified. The results shows that our algorithm is better than many typical scheduling schemes.

关键词： Scheduling algorithm Job shop scheduling Throughput Traffic control Packet switching Integrated circuit technology Very large scale integration Algorithm design and analysis Optical switches communication switching

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Energy Efficiency Clustering Algorithm in Wireless Sensor Network Application

Energy Efficiency Clustering Algorithm in Wireless Sensor Ne...

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： JianSheng Cheng

Wireless sensor networks have attracted much research attention in recent years and can be used in many different *** this paper ,we analyze the impact of energy efficiency in Wireless sensor networks, as a result is clustering technique has been proven to be an effective approach for reducing energy *** also can increase the scalability and lifetime of the network, we propose a novel cluster formation algorithm for wireless sensor networks according to considering the energy as an optimization parameter. Compared to other algorithms,the clustering algorithm increase the cluster head election mechanism, and the simulation results show that clustering algorithm achieves its intention of consuming less energy.

关键词： Energy efficiency Clustering algorithms Wireless sensor networks communication system security Optical receivers control systems Telephony Computer architecture Wires Radio transmitters

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Improving Performance of VoIP Services in IEEE 802.16 OFDMA System

Improving Performance of VoIP Services in IEEE 802.16 OFDMA ...

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Xuan Wang Ke Yu Lin Zhang Advanced Network Technology Laboratory School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

IEEE 802.16 is a promising technology in broadband wireless access area. In this paper, a novel performance analysis model is provided focusing on the VoIP services in TDD OFDMA-based IEEE 802.16 system. Based on the analysis results, a united packet aggregation scheme for both uplink and downlink is provided. The simulation results show that the packet aggregation in MAC layer not only improves the VoIP capacity but also guarantees the quality of VoIP through decreasing the VoIP packet delay.

关键词： Performance analysis Downlink Delay Traffic control Streaming media Internet telephony Automatic repeat request Forward error correction Laboratories Protocols

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Quantum Mechanical Modeling and Molecular Dynamic Simulation of Ruthenium (Ru) Polypyridyl Complexes to Study Feasibility of Artificial Photosynthesis

Quantum Mechanical Modeling and Molecular Dynamic Simulation...

引用

international conference on advances in Recent Technologies in communication and computing, ARTCom

作者： P. Premkumar Krishnan Namboori P.K. M. Sathishkumar K.I. Ramachandran Deepa Gopakumar Comput. Eng. & Networking Amrita Vishwa Vidyapeetham Univ. Coimbatore India Computational Engineering and Networking Amrita Vishwa Vidyapeetham University Ettimadai Coimbatore INDIA

A photochemical reaction is initiated by a charge separation process in the reaction center (RC) complex. Major research in this regard is to analyze the light driven electron transfer and to study the response of the molecule in which the RC is embedded, stabilizing the charge separation process in photosynthesis. In research related to artificial photosynthesis, modeling and simulation of highly energetic photosensitizers have been always a choice. Ruthenium (II) polypyridyl complexes are widely used in this regard. In this work these complexes have been successfully designed in the computational manner with a quantum mechanical model in the density functional level of theory (DFT) based on the local density approximation energy expression augmented by BLYP corrections using the DND basis set with 'all electron core' treatment option. In the analysis, band energy, electronic population, vibrational frequency, thermodynamic functions and energies of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) have been used. Molecular dynamic simulation studies were conducted to characterize the dynamic properties. In the analysis, the 'metal ligand charge transfer transition' (MLCT) in these complexes has been studied in detail. Thermodynamic stability of these complexes has been compared. The pi-electron acceptor properties of the tetra cyano ruthenium poly pyridyl complexes has been found to be in the order of bpz (2,2'-bipyrazine)> bptz (3,6-bis-(2-pyridyl)-1,2,4,5-tetrazine) > dpp (2,3-bis(2'-pyridyl) pyrazine) > bpy (2,2'-pyridine). The possibility for these compounds to be used as photosynthetic targets will also follow the same order.

关键词： Quantum mechanics Separation processes Electrons Quantum computing Thermodynamics Photochemistry Computational modeling Vibrations Frequency Charge transfer

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Wireless Vision Based Object Tracking Using Continuously Adaptive Mean Shift Tracking Algorithm

Wireless Vision Based Object Tracking Using Continuously Ada...

引用

international conference on advances in Recent Technologies in communication and computing, ARTCom

作者： I. Manju Jackin Manigandan Muniraj Department of ECE Velammal College of Engineering and Technology Chennai India

In this paper we implement a wireless vision based object tracking system with wireless surveillance camera which uses a novel color based object tracking algorithm designed to work on any non-ideal environment. The implementation of the kernel-based tracking of moving video objects based on the CAMSHIFT algorithm is presented. We show that the algorithm performs exceptionally well on moving objects in video sequences and it is robust to changes in shape with complete occlusion. The improvement in performance is achieved by using an adaptive block-based approach for estimating motion between frames and an efficient modulation scheme is used to control the gap between frames used for object tracking. The algorithm for detecting occlusion proceeds in two steps. First, covered regions are estimated from the displaced frame difference. Then, covered regions are classified into actual occlusions and false alarms using motion characteristics. Disocclusion detection is also performed in a similar manner using motion vector information is proposed in this paper.

关键词： Surveillance Cameras Algorithm design and analysis Video sequences Robustness Shape Programmable control Adaptive control Motion estimation Motion control

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The Design and realization of Monitoring System of Didactical Quality of Higher Vocational and Technical Education

The Design and realization of Monitoring System of Didactica...

引用

international conference on Genetic and Evolutionary computing (WGEC)

作者： Qingshan Yang Quanhui Liu Mingying Zhang Guilin University of Electronic and Technology China

As the continued expansion of school scope of Higher Vocational and Technical Education, to apply computer communication network and modern analytical methods and means to do collection, processing, analysis and feedback for process of higher vocational and technical education, then to form positive, institutionalized, standardized and objective operation system of real-time monitoring and controlling of the whole, and to implement modernization, networking, real-time and internalization teaching management of higher vocational and technical school, is the inevitable choice of improving quality and school effectiveness of higher vocational and technical education, and strengthening school competitiveness, in the circumstances of forward development of higher vocational and technical education scope, and continued improvement of social requirement level.

关键词： Educational institutions Continuing education Computer science education Computerized monitoring Real time systems Computer networks communication networks Feedback communication system control control systems

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Policy-Based Behavior control

Policy-Based Behavior Control

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Zhi Lin Jing Wang Lian-xing Jia

Currently, most security models focus on different control objects or restrict conditions, and this method loses generality. One example is RBAC, which only controls access behavior. It is the specialty that restrains model from being used widely. RBAC can only be used in application related to access control. Why do we not take general behavior as control object? Policy-based security technology can manage behavior uniformly. If we can use the general behavior as control object, and combine with policy-based technology, great progress will be got. This paper proposes a Policy-based Behavior control model (PBBC). PBBC controls system with general behavior. And the property of the behavior is described with variable. Hence the restriction of the behavior is also general and more comprehensive than the exiting models. Furthermore, based on policy, PBBC separates application logic, control logic and security policy from each other, which makes it more flexible and is easy to be realized. In this paper, we provide the description of PBBC and its design method. An application sample of PBBC is also provided.

关键词： control system synthesis communication system control Access control control systems Automatic control Logic Computer security Information security Technology management Design methodology

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Efficient Admission control Scheme to Support QoS in WLANs

Efficient Admission Control Scheme to Support QoS in WLANs

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Shi Yan Songgen Jin Zhiguo Chen Educ. Technol. & Network Inf. Center Mudanjiang Med. Univ. Mudanjiang China Technol. Sect. of Libr. Mudanjiang Med. Univ. Mudanjiang China

In order to support quality of service (QoS) for realtime traffic in wireless local area networks (WLANs), an efficient admission control scheme called EACS is proposed. According to the QoS requests of existing connections in access point's polling table, EACS decides the maximum contention resolution time which can meet the existing requirements. Then, EACS determines the maximum number of stations that system can support by searching resource management algorithm, which records the relation between the system load and contention resolution time. Finally, these stations with the contending permission employ the efficient contention control mechanism to contend the channel. Simulation results proved the proposed EACS makes the stations achieve lower transmission delay and better channel utilization.

关键词： Admission control Quality of service Wireless LAN communication system traffic control Resource management Delay Personal digital assistants Permission Portable computers Telecommunication traffic

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A High-Linearity, 60-dB Variable Gain Amplicier with Dual DC-Offset Cancellation for UWB Systems

A High-Linearity, 60-dB Variable Gain Amplicier with Dual DC...

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： J. Cheng F. Y. Huang L. H. Wu Y. Tian N. Jiang RF&OEIC Research Institute South-East University Nanjing China S-TEK Research Center Shanghai China

A fully differential variable gain amplifier (VGA) for ultra-wideband (UWB) systems has been designed in a standard 0.18 mum CMOS process. The VGA is implemented using three variable gain stages followed by a fixed gain amplifier stage with a dual feedback DC-offset cancellation network to correct DC-offset. The proposed VGA shows a high linear gain range of 60 dB (0.7 dB-60.7 dB) at 650 MHz, drawing 8.9 mA with a 1.8 V power supply. The VGA chip occupies only 0.23 mm 2 (0.47 mmtimes0.47 mm) active area.

关键词： Gain Voltage Bandwidth Feedback circuits Differential amplifiers Hemorrhaging Computer architecture Negative feedback Wireless communication communication system control

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The Impact of Simulation Area Shape on the Performance of Ad Hoc Networks

The Impact of Simulation Area Shape on the Performance of Ad...

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Heng Luo David Laurenson Aihuang Guo Hui Li Institute of Digital Communication University of Edinburgh UK College of Electronics and Information Engineering University of Tongji China

The shape of the simulation area is critical in simulations because average hops of source to destination will change in different shapes. We measure one reliability metric (connectivity) and five efficiency metrics (round trip time, drop rate, energy cost, routing overhead and throughput goodput) in various shapes of simulation areas. Three routing protocols (DSDV, AODV and DSR) are carefully studied in different mobility patterns as well as speeds. Results show that DSDV performs the worst in most cases except in the case of round trip time. We prove that network efficiency metrics enhance when the reliability metric decreases. One exception is that the throughput descends when the horizon length increases. The key reason, we believe, is that the influence of network partitioning out-ranks the impact of network transmission condition improvement.

关键词： Ad hoc networks Routing protocols Shape measurement Throughput Telecommunication traffic Traffic control Gaussian processes Digital communication Area measurement Energy measurement

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