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International Conference on Electronic computer Technology

作者： Mohd. Sadiq Farhana Mariyam Aleem Alil Shadab Khan Pradeep Tripathi Computer Engineering Laboratory Section of Computer Engineering University Polytechnic Faculty of Engineering and Technology Jamia Millia Islamia (A Central University) New Delhi India Department of Computer Science and Engineering AL-Falah School of Engineering and Technology Maharshi Dayanand University Rohtak Haryana India Department of Computer Science and Information Technology Sunder Deep College of Engineering and Technology U.P. Technical University Lucknow U.P. India

Software development effort estimation is a branch of forecasting that has received increased interest in academia as well as in the field of research and development. Predicting software effort with any acceptable degree remains challenging. In this paper we have developed 2 different linear regression models using fuzzy function point (FFP) and non fuzzy function point in order to predict the software project effort and further we have also considered that the entire projects are organic in nature i.e. the project size lies between 2 to 50 KLOC. After obtaining the software effort, project manager can control the cost and ensures the quality more accurately.

关键词： Software Estimation Biological system modeling Complexity theory Programming Mathematical model Computational modeling

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Development of control program for plant growth parameter analysis in lowland tropical greenhouse

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Journal of Applied Sciences 2011年第3期11卷 592-598页

作者： Wan Ishak, W.I. Yin, Tan Ming Hudzari, R.M. Department of Biological and Agriculture Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia Intelligent System and Robotic Laboratory Institute of Advanced Technology Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia

The purpose of this project is to develop control system for environment parameter in the lowland tropical greenhouse using Microcontroller. The plant growth analysis covered both inside and outside greenhouse was presented. The controller was used to monitor the temperature, relative humidity and Vapor Pressure Deficit (VPD) in the planting of chili. The study of VPD is to show air moisture conditions for plant production while taking into account different temperature levels. The controller is used to maintain the ideal VPD inside the greenhouse where it has been done for an experimental greenhouse. The higher temperature inside greenhouse, during the day time, further proves the greenhouse effect. The ideal VPD is about to achieve at midnight where the temperature ranged between 19 and 23°C at relative humidity of 54 to 57%. PIC controller was successfully being used and interfacing with computer (read data). The ability of controlling the environment parameter such as temperature, relative humidity and VPD give great potential for the application of the greenhouse in agriculture plantation. © 2011 Asian Network for Scientific Information.

关键词： Controllers

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Distributed road surface condition monitoring using mobile phones

Distributed road surface condition monitoring using mobile p...

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8th International Conference on Ubiquitous Intelligence and Computing, UIC 2011

作者： Perttunen, Mikko Mazhelis, Oleksiy Cong, Fengyu Kauppila, Mikko Leppänen, Teemu Kantola, Jouni Collin, Jussi Pirttikangas, Susanna Haverinen, Janne Ristaniemi, Tapani Riekki, Jukka Computer Science and Engineering Laboratory University of Oulu P.O. BOX 4500 Oulu Finland Faculty of Information Technology University of Jyväskylä P.O. BOX 35 Jyvaskyla Finland Department of Computer Systems Tampere University of Technology P.O. BOX 553 Tampere Finland

ISBN: (纸本)9783642236402

The objective of this research is to improve traffic safety through collecting and distributing up-to-date road surface condition information using mobile phones. Road surface condition information is seen useful for both travellers and for the road network maintenance. The problem we consider is to detect road surface anomalies that, when left unreported, can cause wear of vehicles, lesser driving comfort and vehicle controllability, or an accident. In this work we developed a pattern recognition system for detecting road condition from accelerometer and GPS readings. We present experimental results from real urban driving data that demonstrate the usefulness of the system. Our contributions are: 1) Performing a throughout spectral analysis of tri-axis acceleration signals in order to get reliable road surface anomaly labels. 2) Comprehensive preprocessing of GPS and acceleration signals. 3) Proposing a speed dependence removal approach for feature extraction and demonstrating its positive effect in multiple feature sets for the road surface anomaly detection task. 4) A framework for visually analyzing the classifier predictions over the validation data and labels. © Springer-Verlag Berlin Heidelberg 2011.

关键词： Accelerometers

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A New On-Line/Off-Line Adaptive Antenna Array Beamformer for Tracking the Mobile Targets

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International Journal of Communications, Network and system Sciences 2011年第5期4卷 304-312页

作者： Shahriar Shirvani Moghaddam Mahyar Shirvani Moghaddam 1Digital communications signal Processing Research Lab. Faculty of Electrical and Computer Engineering Shahid Rajaee Teacher Training University (SRTTU) Tehran Iran 2Department of Electrical Engineering and Advanced Communication Research Institute Sharif University of Technology Tehran Iran

An adaptive antenna array system adjusts the main lobe of radiation pattern in the direction of desired signal and points the nulls in the direction of undesired signals or interferers. The essential goal of beamforming is to reduce the complexity of weighting process and to decrease the time needed for adjusting the antenna radiation pattern. In this article a new adaptive weighting algorithm is proposed for both least mean squares (LMS) and constant modulus (CM) algorithms. It is appropriate and applicable for antenna array systems with moving targets and also mobile applications as well as sensor networks. By predicting the relative velocity of source, the next location of the source will be estimated and the array weights will be determined using LMS or CM algorithm before arriving to the new point. For the next time associated to the new sampling point, evaluated weights will be used. Furthermore, by updating these weights between two consecutive times the effects of error propagation will be eliminated. Therefore, in addition to reduction in computational complexity at the time of weight allocation, relatively accurate weight allocation can be obtained. Simulation results of this investigation show that the angular error related to both LMS-based and CM-based algorithms is less than the conventional LMS and CM algorithms at different signal to noise ratios (SNRs). On the other hand, due to considering off-line process, online computational complexity of new algorithms is slightly low with respect to previous ones.

关键词： Beamforming Adaptive Antenna Array LMS CM Training-Based Blind

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Uml-based web engineering framework for modeling web application

Journal of Software Engineering

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Journal of Software engineering 2011年第2期5卷 49-63页

作者： Elminir, Hamdy K. Elsoud, Mohamed Abu El-Halawany, A.M. Misr Academy for Engineering and Technology Faculty of Computers and Information Sciences Mansoura University Egypt Department of Computer Science Faculty of Computers and Information Sciences Mansoura University Egypt Digital Chains Company Mansoura Branch Egypt

Unified modeling language-based web engineering (UWE) is a software engineering approach for the Web domain aiming to cover the whole life-cycle of Web application development. UWE uses both UML and UML extension mechanisms to develop a web application, UML extension mechanisms define specific stereotype to model system requirements model, conceptual model, navigation model and presentation model. Each one of these models has its modeling elements. Transformation rules that are used for mapping between different models are rarely investigated. Besides the absence of modeling elements to model server side process, client side process, web service which is a method of communication between different web applications and threading concept which is the smallest unit of processing that can be scheduled. A UWE framework is proposed transformation rules for mapping between different models and provides additional modeling elements. UWE based framework consists of four phases (requirements modeling phase, conceptual modeling phase, navigation modeling phase and presentation modeling phase) with each of which having its model and modeling elements. Proposed framework includes a set of transformation rules for the mapping process between different phases. © 2011 Academic Journals Inc.

关键词： Mapping

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Wireless powered implantable bio-sensor tag system-on-chip for continuous glucose monitoring

Wireless powered implantable bio-sensor tag system-on-chip f...

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IEEE Biomedical Circuits and systems (BIOCAS)

作者： Shuo Guan Jingren Gu Zhonghan Shen Junyu Wang Yue Huang Andrew Mason State Key Laboratory of ASIC and System Fudan University Shanghai China Department of Electrical and Computer Engineering Michigan State University East Lansing USA

An implantable passive radio frequency identification (RFID) sensor tag system-on-chip (SoC) for glucose monitoring is developed in this paper. A high frequency RFID tag, a bio-sensor interface, as well as the electrodes are included in this chip. The signal of blood sugar level from the bio-sensor is detected and converted into digital data, and then the data is encrypted and transmitted to an RFID reader on top of the skin. To measure the weak current signals, a current readout circuit, a current splitter, an ADC and a potentiostat are designed in the chip. Correlated double sample (CDS) technology is used in the readout circuit to reduce the 1/f noise and the op-amp's offset. The chip is taped out in SMIC 0.13 μm CMOS process. Simulation results show that the system can measure weak current signals in the range of 10 fA-100 pA.

关键词： Baseband Sugar Rectifiers system-on-a-chip Clocks Current measurement Radiofrequency identification

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Improved servomechanism control design - Dynamically damped case

Improved servomechanism control design - Dynamically damped ...

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International Conference on Control and Automation (ICCA)

作者： Aurélio T. Salton Zhiyong Chen Minyue Fu School of Electrical Engineering and Computer Science University of Newcastle Callaghan NSW Australia State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology China Department of Control Science and Engineering Zhejiang University China

Time optimal control (TOC) for servomechanism is not a practical controller due to the chattering phenomenon that occurs on the presence of noise and model uncertainty. Maybe the most popular attempt to transform this controller in a practical one comes from the so called Proximate Time Optimal Servomechanism (PTOS). This approach starts with a near time optimal controller and then switches to a linear controller when the system output approaches the target. While the chattering phenomenon is avoided, this comes at an expense in performance generated by the so called “acceleration discount factor”. This paper will present a controller that makes use of dynamic damping in order to push the acceleration discount factor arbitrarily close to one, thus practically eliminating the conservatism present in the PTOS. Experimental results support the proposed design.

关键词： Damping Servomechanisms Trajectory Acceleration Control design Friction

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Improved Servomechanism Control Design – Nonswitching Case

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IFAC Proceedings Volumes 2011年第1期44卷 8614-8619页

作者： Aurélio T. Salton Zhiyong Chen Minyue Fu School of Electrical Engineering and Computer Science The University of Newcastle Australia Pontifícia Universidade Católica do Rio Grande do Sul Brazil State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology China Department of Control Science and Engineering Zhejiang University China

Abstract This paper attempts to achieve time-optimal performance for servomechanisms via a practical feedback control law. An improvement over the traditional Proximate Time Optimal Servomechanism (PTOS) is proposed in order to eliminate the conservatism present in the controller. The original PTOS switches from the nonlinear approximation of Time Optimal Control (TOC) to a linear controller as the system approaches the reference point. This switching results in a compromise in performance inasmuch as the linear controller is not sufficiently aggressive to settle the system output with acceptable levels of overshoot. The proposed controller eliminates the necessity of the switching function by making use of an elaborate nonlinear control law. Simulations and experimental results show that the proposed design achieves levels of performance comparable to that of the theoretical TOC.

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Modeling and Simulation of 500 kV Transmission Network for Numerical Fault Calculation, Detection, Using PSCAD/EMTDC

Modeling and Simulation of 500 kV Transmission Network for N...

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IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： Pairoj Kajoijilertsakul Santi Asawasripongtorn Peerayot Sanposh Jittiwut Suwatthikul Hideaki Fujita Department of Electrical Engineering Faculty of Engineering Kasetsart University Bangkok Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Bangkok Thailand Department of Electrical and ElectronicEngineering Tokyo Institute of Technology Tokyo Japan

This paper presents modeling of the 500 kV transmission line located between Bang-Saphan 2 (BSP2) and Chom-Bung (CBG) substations, Thailand. The network is modeled based on the transient simulation program- PSCAD/EMTDC. The equivalent circuit of BSP2 and CBG is obtained from the actual parameters. The initial condition parameters are verified by PSS/E, an electrical simulation program. After the modeling has been established, a fault analysis is done by using PSCAD/EMTDC in order to study the system response when fault constrains are applied. This paper has illustrated that how the information on the sampled voltage and current waveforms derived from PSCAD/EMDTC modeling and simulation can be used for fault detection, classification and location.

关键词： Integrated circuit modeling Circuit faults PSCAD EMTDC Protective relaying Power transmission lines RLC circuits

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system design and implementation of social interactive robot Nancy

System design and implementation of social interactive robot...

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International Conference on Information Sciences and Interaction Sciences (ICIS)

作者： Shuzhi Sam Ge Chun Fui Liew Yanan Li Institute of Intelligent Systems University of Electronic Science and Technology Chengdu China Social Robotics Laboratory Interactive Digital Media Institute and Department of Electrical and Computer Engineering National University of Singapore Singapore Social Robotics Laboratory Interactive Digital Media Institute and NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore

This paper presents a social interactive robot Nancy that has been developed in Social Robotics laboratory, National University of Singapore. Fundamentally different from factory robots, Nancy's design focuses on social interaction and social intelligent system. The design objectives and consideration are examined in the beginning, followed by the description of hardware and software architectures. Contrast to current existing social robots, Nancy has a graphical user interface (GUI), which acts as an additional channel for human-robot interaction. This GUI helps users to have a better understanding of Nancy's internal states and hence make users feel more comfortable during the interaction with Nancy. Visitors' interaction experience with Nancy is discussed together with Nancy's social skills.

关键词： Robots Graphical user interfaces Servomotors Speech Universal Serial Bus Face Hardware

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