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Development of Magnetic Pulsed Launcher System using Capacitor Banks 利用电容器组研制脉冲磁发射系统
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451400
M. Rezal, S. Iqbal, K.W. Hon
{"title":"Development of Magnetic Pulsed Launcher System using Capacitor Banks","authors":"M. Rezal, S. Iqbal, K.W. Hon","doi":"10.1109/SCORED.2007.4451400","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451400","url":null,"abstract":"Recent researches on magnetic launcher is rapidly on the rise due to the demand for smooth projectile launching system. A magnetic pulsed launcher (MPL) system is a method for launching a projectile in a smooth linear motion. It applies the basic theories of electromagnetism and circuit theory. This MPL system is basically divided into two categories, one using a coil launcher and the other an induction launcher. In this paper, a small scale MPL system is developed based on the coil launcher technology. A small capacitor (330 muF, 400 V) and a single coil (16 mH) are used in the design whereas the reviewed paper uses a big capacitor and multiple coils. Experiments and simulations have been done to compare and study the relationship between voltage, capacitance, and projectile initial position for optimization of the system. An algorithm is designed based on the experimental data and it is used to optimize the MPL efficiency by changing the value of voltage, capacitance, and projectile position. The MPL have a highest efficiency of 10.05% at 1 cm projectile position when it is supplied with 286 muF, 680.2 V capacitor banks for horizontal motion while 2.55% for vertical motion. The projectile have a highest speed of 23.07 ms-1 for horizontal motion while 11.62 ms-1 for vertical motion.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131994944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Optical Front-end Receiver Design for Radio over Fiber System 光纤无线通信系统的光前端接收机设计
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451438
H. Harun, S. M. Idrus, A. .. Mohammad
{"title":"Optical Front-end Receiver Design for Radio over Fiber System","authors":"H. Harun, S. M. Idrus, A. .. Mohammad","doi":"10.1109/SCORED.2007.4451438","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451438","url":null,"abstract":"Mobile communication system faces serious challenges serve high quality broadband service in any situation even in highly dense populated area and high mobility users. Radio over fiber (RoF) technology is proposed as a solution for reducing cost and providing highly reliable communication services. The RoF system is very cost-effective because the localization of signal processing in central station and also use a simple base station. In this paper, two methods of RoF system are investigated for transmitting the radio signal over the optical links with intensity modulation. There are RF signal or IF signal transmission over optical fiber. This paper focus on the RoF optical front-end receiver configuration especially optical heterodyne employing an optoelectronic mixer. Thorough review and comparison of previous works, the HBT is the best performance as an optoelectronic mixer and frequency conversion to millimeter wave.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133812679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
The Evaluation of User Mobility Behavior in Personal Communication Service Network 个人通信服务网中用户移动行为评价
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451429
R. Munadi, M. Ismail, M. Abdullah
{"title":"The Evaluation of User Mobility Behavior in Personal Communication Service Network","authors":"R. Munadi, M. Ismail, M. Abdullah","doi":"10.1109/SCORED.2007.4451429","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451429","url":null,"abstract":"Cellular technology has shown a tremendous impact to communication behavior and human life. The growth of cellular users' increase every year world wide. GSM as the second generation still exist as the famous technology and soon the third generation comes as a competitor. This technology has delivered an opportunity to communicate to anyone, anywhere and anytime wherever the service is available. In terms of services, many network operators have expanded the service coverage to cope with the increased of user density in a certain service area and improved services to enhance quality of service. In this paper, three control mobility schemes of user movement using a certain threshold level are proposed to investigate user mobility behavior. Each of these schemes incorporates equal cell size and examines in similar mobile environment based random mobility model. Every user can move in any direction with equal probability. Based on hexagonal cell model, 49 cells have been developed as a service area for simulation environment. Two mobility characteristics: user distribution and direction are considered as parameters to analyze user behavior in the certain service area. Simulation results using three mobility control schemes: scheme A, scheme B and scheme C; have shown that in time domain analysis. Result shows that the direction of each MS for any implemented scheme is unique. In term of mobility characteristic, we find that 90% of service area are occupied by MS for both balanced and un-balanced strategies while in cell strategy approach the distribution for all the schemes the result is less that the above strategies in terms of service.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115328477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of Physical Exercise on the Photoplethysmogram Waveform 体育锻炼对光容积图波形的影响
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451399
K. Chellappan, E. Zahedi, M. A. Mohd. Ali
{"title":"Effects of Physical Exercise on the Photoplethysmogram Waveform","authors":"K. Chellappan, E. Zahedi, M. A. Mohd. Ali","doi":"10.1109/SCORED.2007.4451399","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451399","url":null,"abstract":"Photoplethysmography is a non-invasive method which is suitable to estimate vascular compliance. Photoplethysmogram (PPG) waveform has been used to evaluate vascular characteristic changes due to exercise. Quantification of the primary and secondary peak position is of interest as a potential objective, individualized measure of the level of exercise that a subject has achieved with respect to a baseline status, prior to the beginning of the exercise session. The modified bicycle ergonomic protocol was selected for this experiment. Two different signal processing methods were employed in processing the PPG waveform to characterize its changes through a single parameter. Both, the visual inspection of the recorded PPG and the results of the analyses reinforce our opinion about the existence of continuous changes in PPG waveform through an exercise session. The experiment results confirm that PPG can be a potential approach in quantifying cardiovascular characteristics or properties of an individual.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115572103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Automatic Detection of 'ROIs' for Plastic Bottle Classification 用于塑料瓶分类的“roi”自动检测
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451420
S. Ramli, M. Mustafa, A. Hussain, D. A. Wahab
{"title":"Automatic Detection of 'ROIs' for Plastic Bottle Classification","authors":"S. Ramli, M. Mustafa, A. Hussain, D. A. Wahab","doi":"10.1109/SCORED.2007.4451420","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451420","url":null,"abstract":"Recycling is widely assumed to be environmentally beneficial, although the collection, sorting and processing of materials gives rise to some environmental impacts and energy use. Previously, plastic recycling are based on the material used. In this work, we propose a new approach to classify plastic bottle by implementing the viability of imaging technology for automated sorting. According to the original image of plastic bottle, there are obvious features that can discriminate between 2 classes of plastic bottles which are PET and Non-PET. The methodology involves an automatic detection of 'ROIs' from region segmented technique and proposed the histogram of pixel intensity algorithm in order to differentiate between 2 class of bottle; i.e PET and non-PET according to the property of transparency and opacity. The proposed technique shows ability to perform plastic bottle classification with more than 80% accuracy was obtained from this research.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114521076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Feasible Route Determination Using Ant Colony Optimization in Evacuation Planning 基于蚁群优化的疏散规划可行路径确定
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451424
Arief Rahman, Ahmad Kamil Mahmood
{"title":"Feasible Route Determination Using Ant Colony Optimization in Evacuation Planning","authors":"Arief Rahman, Ahmad Kamil Mahmood","doi":"10.1109/SCORED.2007.4451424","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451424","url":null,"abstract":"The most complex aspect of people movement on emergency condition is how to select the shortest way out from multi exit ways in the multi-floors building. The purpose of this paper is to demonstrate how an ant colony optimization (ACO) can be used in evacuation planning. Modified ACO applied as the algorithm to determine the feasible route during emergency evacuation. Physical obstacle during building evacuation such as bottleneck or disaster problem has been considered in transitional probability rule of ACO. By creating exit sign (an agent) with ACO as the algorithm, this agent decides the feasible route and guides the occupant during the evacuation. Two scenarios present to observe the performance of two different approaches in making decision during evacuation. When the obstacle appeared, route selection based on ACO algorithm has faster total evacuation time significantly than familiarity of environment exit method.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117147632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
A New Method of Transient Stability Assessment in Power Systems Using LS-SVM 基于LS-SVM的电力系统暂态稳定评估新方法
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451446
A. Izzri, A. Mohamed, I. Yahya
{"title":"A New Method of Transient Stability Assessment in Power Systems Using LS-SVM","authors":"A. Izzri, A. Mohamed, I. Yahya","doi":"10.1109/SCORED.2007.4451446","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451446","url":null,"abstract":"This paper presents transient stability assessment of electrical power system using least squares support vector machine (LS-SVM) and principle component analysis. Transient stability of a power system is first determined based on the generator relative rotor angles obtained from time domain simulation outputs. Simulations were carried out on the IEEE 9- bus test system considering three phase faults on the system. The data collected from the time domain simulations are then used as inputs to the LS-SVM in which LS-SVM is used as a classifier to determine the stability state of a power system. Principle component analysis is applied to extract useful input features to the LS-SVM so that training time of the LS-SVM can be reduced. To verify the effectiveness of the proposed LS-SVM method, its performance is compared with the multi layer perceptron neural network. Results show that the LS-SVM gives faster and more accurate transient stability assessment compared to the multi layer perceptron neural network in terms of classification results.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125397036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Design and Simulation of X-Band Micromachined Microstrip Antenna x波段微带天线的设计与仿真
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451435
M.F. Islam, M. Ali, B. Majlis
{"title":"Design and Simulation of X-Band Micromachined Microstrip Antenna","authors":"M.F. Islam, M. Ali, B. Majlis","doi":"10.1109/SCORED.2007.4451435","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451435","url":null,"abstract":"There is an increasing demand for newer microwave and millimeter-wave systems to meet the emerging telecommunication challenges with respect to size, performance and cost. Micro electro mechanical systems (MEMS) have several desirable features, including small size, high performance, low power consumption and low loss. This paper presents an X- band probe fed small rectangular microstrip patch antenna based on high-resistivity silicon substrate which is capable to reduce the dimensions of the antenna. The antenna was designed on 0.375 mm-thik substrate using microstrip technology followed by probe feeding technique. Microstrip and probe feeding technique offer easy fabrication process using MEMS technology. The design and simulation of the antenna were performed using 3D full wave electromagnetic simulator IE3D. The antenna with a bandwidth of 118.14 MHz and a center frequency of 9.6 GHz which is within the allowable specturm (9.5-9.8 GHz) for Earth Exploration Satellite System (EESS) was simulated successfully.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126107751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Detection and Classification of Power Quality Disturbances Using Time-Frequency Analysis Technique 基于时频分析技术的电能质量扰动检测与分类
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451404
Abdul Rahim Abdullah, A. Sha'ameri, Abd Rahim Mat Sidek, Mohammad Razman Shaari
{"title":"Detection and Classification of Power Quality Disturbances Using Time-Frequency Analysis Technique","authors":"Abdul Rahim Abdullah, A. Sha'ameri, Abd Rahim Mat Sidek, Mohammad Razman Shaari","doi":"10.1109/SCORED.2007.4451404","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451404","url":null,"abstract":"This paper presents the detection and classifications of power quality disturbances using time-frequency signal analysis. The method used is based on the pattern recognition approach. It consists of parameter estimation followed classification. Based on the spectrogram time-frequency analysis, a set of signal parameters are estimated as input to a classifier network. The power quality events that are analyzed are swell, sag, interruption, harmonic, interharmonic, transient, notching and normal voltage. The parameter estimation is characterized by voltage signal in rms per unit, waveform distortion, harmonic distortion and interharmonic distortion. A rule based system is developed to detect and classify the various types of power quality disturbances. The system has been tested with 100 data for each power quality event at SNR from OdB to 50dB to verify its performance. The results show that the system gives 100 percent accuracy of power quality signals at 30 dB of SNR.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126543591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 26
Development of a Novel Random Matrix Spreading Code Generator for WCDMA Rake Receiver WCDMA Rake接收机随机矩阵扩频码发生器的研制
2007 5th Student Conference on Research and Development Pub Date : 2007-12-01 DOI: 10.1109/SCORED.2007.4451416
F. H. Hashim, M. Othman, M. Ismail
{"title":"Development of a Novel Random Matrix Spreading Code Generator for WCDMA Rake Receiver","authors":"F. H. Hashim, M. Othman, M. Ismail","doi":"10.1109/SCORED.2007.4451416","DOIUrl":"https://doi.org/10.1109/SCORED.2007.4451416","url":null,"abstract":"This paper describes a proposed spreading method to improve the bit error rate (BER) and user capacity in WCDMA system. The method is applied to the system up-link. The spreading process includes a new proposed random matrix constructed using the Walsh code generator, called randmat spreading code generator. Conventionally, the selection of the Walsh seed is highly dependable on the spreading factor (SF) of the system. This spreading factor has to be in the power of 2. However, by carefully selecting a variable n, to result in SF-h for the input seed to the Walsh code, our simulation results show that the BER can improve dramatically. The proposed multilevel modulation method could also increase the data rate and user capacity of the WCDMA system. To test the functionality of our proposed spreading method, we use a simulation model using MATLAB that is close to the behavior of a mobile station as specified in the WCDMA standards, specifically ETSI TS 125.211 and ETSI TS 125.213.","PeriodicalId":443652,"journal":{"name":"2007 5th Student Conference on Research and Development","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129671174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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