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Pakistan Journal of Engineering Technology最新文献

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Stochastic Dynamic Job Shop Scheduling with Sequence- Dependent Setup Times: Simulation Experimentation 具有序列相关设置时间的随机动态作业车间调度:仿真实验
Pakistan Journal of Engineering Technology Pub Date : 2015-01-01 DOI: 10.4103/0976-8580.149475
P. Sharma, Ajai Jain
{"title":"Stochastic Dynamic Job Shop Scheduling with Sequence- Dependent Setup Times: Simulation Experimentation","authors":"P. Sharma, Ajai Jain","doi":"10.4103/0976-8580.149475","DOIUrl":"https://doi.org/10.4103/0976-8580.149475","url":null,"abstract":"Stochastic dynamic job shop (SDJS) scheduling problems with sequence-dependent setup times are among the most difficult classes of scheduling problems. This paper assesses the performance of five dispatching rules (DRLs) in such shop from makespan, mean flow time, mean tardiness, number of tardy jobs, total setups, and mean setup time performance measures viewpoint. A discrete event simulation model of a SDJS manufacturing system is developed for investigation purpose. Five DRLs, that is, first come first serve (FCFS), shortest processing time (SPT), shortest setup time (SIMSET), earliest due date (EDD) and shortest sum of setup times and processing time (SSPT) are incorporated in the simulation model. The simulation experiments are conducted under due date tightness factor of 3, shop utilization percentage of 90 and setup time less than processing time. Results indicate that SIMSET rule provides best performance for mean flow time and number of tardy jobs performance measures. The SPT rule provides best performance for mean tardiness measure. The EDD rule is best-performing DRL for makespan, total setups and mean setup time measures.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"80 1","pages":"19"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73419185","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: 6
Triple Single Slope and Dual Slope Frequency to Voltage Converter Circuits 三单坡和双坡频率电压转换电路
Pakistan Journal of Engineering Technology Pub Date : 2015-01-01 DOI: 10.4103/0976-8580.149485
K. C. Selvam
{"title":"Triple Single Slope and Dual Slope Frequency to Voltage Converter Circuits","authors":"K. C. Selvam","doi":"10.4103/0976-8580.149485","DOIUrl":"https://doi.org/10.4103/0976-8580.149485","url":null,"abstract":"A sinusoidal frequency to voltage converters using op-amp based triple integrators, dual comparator and dual peak detectors, is explained in this paper. The output DC voltage is linearly proportional to the sinusoidal input frequency. The proportional constant is the product values of a resistor, a capacitor and a reference DC voltage. By employing precision values for these three quantities, an acceptable level of accuracy can be achieved. Verification of feasibility of the circuit is established by way of test results.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"37 1","pages":"41"},"PeriodicalIF":0.0,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81080984","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
Optimization of Fixture Layout and Artificial Neural Network (ANN) Weights of ANN-Finite Element Analysis Based Fixture Layout Model Using Genetic Algorithm 基于遗传算法的基于人工神经网络-有限元分析的夹具布局优化及人工神经网络(ANN)权值
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141180
M. Vasundara, K. Padmanaban
{"title":"Optimization of Fixture Layout and Artificial Neural Network (ANN) Weights of ANN-Finite Element Analysis Based Fixture Layout Model Using Genetic Algorithm","authors":"M. Vasundara, K. Padmanaban","doi":"10.4103/0976-8580.141180","DOIUrl":"https://doi.org/10.4103/0976-8580.141180","url":null,"abstract":"Workpiece elastic deformation in machine manufacturing may cause dimensional errors, which in turn affects the accuracy of the machined parts. Fixturing elements like locators and clamps are used to locate a workpiece with respect to the cutting tool in a given orientation such that the errors caused by workpiece elastic deformation are reduced. The optimization of locator and clamp positions is crucial in minimizing the dimensional errors in machining. In this research paper, a slot milling operation on a rectangular workpiece is considered for which the fixture layout is optimized using a hybrid system of artificial neural network (ANN) and genetic algorithm (GA). The workpiece elastic deformation for different sets of fixture layouts is calculated using finite element method (FEM) and training of ANN is done with the FEM results to develop a numerical model. To enhance the accuracy of learning in lesser time, the weights are optimized for the network using GA before the training phase. The trained ANN recognizes a pattern between the position of fixturing elements and the workpiece elastic deformation. Using the recognized pattern, GA determines the optimal position of locators and clamps to minimize the workpiece elastic deformation and thereby the dimensional errors.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"PP 1","pages":"102"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84297805","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: 3
A Computer Aided Design Modeler for Designing the Plastic Components Using a Set of Programmatic Operations 用一套程序化操作设计塑料部件的计算机辅助设计建模器
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141177
R. Bansal, Punith Kumar
{"title":"A Computer Aided Design Modeler for Designing the Plastic Components Using a Set of Programmatic Operations","authors":"R. Bansal, Punith Kumar","doi":"10.4103/0976-8580.141177","DOIUrl":"https://doi.org/10.4103/0976-8580.141177","url":null,"abstract":"Developments in the field of computer-aided design have targeted on reducing the time and efforts required of designer to define product models. Creating robust parametric [16] models is more time consuming especially as there can be hundreds of features and thousands of mathematical expressions to create. Even if combinations of low-level features [11] known as user-defined features are used, this process still involves inserting individual features into individual components and creating all the inter-part associativities. This work shows that programmatic operations designed for a specific product types (plastic components) can streamline the component-level design process much further because a single programmatic operation can create an unlimited number of low-level features modify geometry in multiple components and create new components. Results from user testing show that a set of high-level programmatic operations can offer savings in time and effort of over 70% and can be general enough to support user-specified component cross sections while leaving the majority of the primary design decisions open to the designer [13] .","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"32 1","pages":"95"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89590625","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
Depiction of Total Quality Management during a Span of 2003-2013 2003-2013年全面质量管理的描述
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141170
Vineet Gupta, D. Garg, Raj Kumar
{"title":"Depiction of Total Quality Management during a Span of 2003-2013","authors":"Vineet Gupta, D. Garg, Raj Kumar","doi":"10.4103/0976-8580.141170","DOIUrl":"https://doi.org/10.4103/0976-8580.141170","url":null,"abstract":"The tenacity of this article is to craft a depiction of one decade's quality movement. The progression of the depiction, aims to ease in establishing the existing standing of total quality management (TQM) and endorse in accepting and influencing its imminent course. In this effort, potential circulated articles during that period under the question of TQM have been collected. The collected data further analyzed and reflected in order to show the delineations, elements and methods that have been cited by various scholars, professionals, academics, etc. The outcomes display the basic to build a renowned philosophy in terms of employee's empowerment, ownership, leadership, cultural change, continuous improvements, etc., based on facts and focus on the customer satisfaction have been increasing more during the last decade.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"13 1","pages":"81"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90500202","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
Characterization of Gamma Prime Phase in Hafnium Doped IN-738LC Nickel Base Superalloy 掺铪in - 738lc镍基高温合金γ素相的表征
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141200
A. Saghafi, J. A. Mohandesi, H. Attar
{"title":"Characterization of Gamma Prime Phase in Hafnium Doped IN-738LC Nickel Base Superalloy","authors":"A. Saghafi, J. A. Mohandesi, H. Attar","doi":"10.4103/0976-8580.141200","DOIUrl":"https://doi.org/10.4103/0976-8580.141200","url":null,"abstract":"In this article, effect of hafnium (Hf) addition to IN-738LC nickel-base superalloy, on the morphology, size distribution and content of gamma prime (γ′) precipitate has been studied. Scanning electron microscopy employed for observation of γ′ precipitates in the matrix. Image analysis process has been performed by Clemex Image Analysis software (Clemex Technologies, Inc., 800 Guimond Blvd, Longueuil, Quebec, Canada). The results show that Hf addition increases the amount of γ′ phase in the alloy, change it morphology from cubical to irregular and spherical shape and forms more stable and finer γ′ particles. Furthermore, selection of a suitable heat treatment is very important for achievement to the obtained results.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"362 1","pages":"119"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75728127","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
Coal as an Energy Source for Mitigating Energy Crisis in Pakistan 煤炭作为缓解巴基斯坦能源危机的能源来源
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141210
M. Rashid, S. Naseem, N. Ramzan
{"title":"Coal as an Energy Source for Mitigating Energy Crisis in Pakistan","authors":"M. Rashid, S. Naseem, N. Ramzan","doi":"10.4103/0976-8580.141210","DOIUrl":"https://doi.org/10.4103/0976-8580.141210","url":null,"abstract":"Pakistan is producing just 0.1% of its electricity from its coal resources. Electricity supply and demand gap in Pakistan is projected to increase rapidly till 2020. Pakistan has major reserves of lignite coal and similar coal has been used for electricity production in Greece, Turkey, Poland, and Germany. Natural gas and oil resources are also becoming meager in Pakistan, which stresses the use of coal gasification techniques for efficient energy generation. Underground coal gasification and fluidized bed combustion are appropriate choices for Pakistani low-grade Thar coal. Relatively high grade Makerwal and Lakhara coals can be gasified by integrated gasification combined cycle technology. Pakistan's abundant indigenous coal reserves can be used to produce fertilizer or different viable gaseous mixtures (producer gas, town gas, water gas, and synthetic natural gas). Syngas produced from coal can be used as an alternate of natural gas to run Pakistan fertilizer plants. Use of coal will also result in production of various chemicals for fertilizer (ammonia), textile (dyes, BTX, phenol, ethylene, and acetic acid) and transport (methanol, diesel, gasoline, liquefied petroleum gas) sectors. Retrofitting of existing oil fired plants, installation of new gasification plants and improving the efficiency of existing coal based power plants has become inevitable for future survival of Pakistan's economy.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"177 1 1","pages":"127"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4103/0976-8580.141210","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72535327","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: 3
Optimization of Proportional Fuzzy Controller for Servo Pneumatic Positioning System Using Taguchi: Data Envelopment Analysis Based Ranking Methodology 基于田口数据包络分析法的伺服气动定位系统比例模糊控制器优化
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141193
D. Saravanakumar, B. Mohan, T. Muthuramalingam
{"title":"Optimization of Proportional Fuzzy Controller for Servo Pneumatic Positioning System Using Taguchi: Data Envelopment Analysis Based Ranking Methodology","authors":"D. Saravanakumar, B. Mohan, T. Muthuramalingam","doi":"10.4103/0976-8580.141193","DOIUrl":"https://doi.org/10.4103/0976-8580.141193","url":null,"abstract":"Even though pneumatic actuators exhibit many advantages, their usage is limited due to its nonlinear nature. In this paper, a sugeno type proportional fuzzy controller has been designed for the fast and accurate position control of pneumatic cylinder. The servo positioning system for pneumatic cylinder with the optimal fuzzy controller has been simulated using Matlab-Simulink software. The design of the fuzzy controller has been optimized by proper selection of range for the membership functions of the input variable of the controller. The objectives for optimizing the controller are to minimize the settling time and the maximum overshoot. This multi-objective optimization problem has been solved by Taguchi based data envelopment analysis based ranking methodology. From the simulation, the optimal controller response for a step input change is obtained as settling time 0.16s and overshoot 0.5%.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"15 1","pages":"115"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87095564","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
Forced Convection Drying of Khoa: A Heat Desiccated Milk Product Khoa的强制对流干燥:一种热干燥乳制品
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141182
Mahesh Kumar
{"title":"Forced Convection Drying of Khoa: A Heat Desiccated Milk Product","authors":"Mahesh Kumar","doi":"10.4103/0976-8580.141182","DOIUrl":"https://doi.org/10.4103/0976-8580.141182","url":null,"abstract":"In this research paper, the convective heat transfer coefficients for khoa drying under indoor forced convection mode by hot air are delineated. The convective heat transfer coefficients have been determined for khoa sample of size 0.09 Χ 0.06 Χ 0.015 m 3 . The khoa sample has been dried as single thin layer for three consecutive days with the help of laboratory dryer until no variation in its mass is recorded. The experimental data have been used to determine the values of the experimental constants in the Nusselt number expression by simple linear regression analysis and then the convective heat transfer coefficients have been evaluated. The convective heat transfer coefficients have been observed to decrease with the drying day progression from the 1 st day to the 3 rd day. The average value of convective heat transfer coefficients have been found to decrease from 2.49 to 1.94 W/m 2 °C. The experimental error in terms of percent uncertainty has also been evaluated.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"6 1","pages":"110"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83421807","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: 3
Fuzzy-Logic Based Medium Access Control Model for Battery Lifetime Enhancement in Wireless Body Area Networks 基于模糊逻辑的无线体域网络中提高电池寿命的介质访问控制模型
Pakistan Journal of Engineering Technology Pub Date : 2014-07-01 DOI: 10.4103/0976-8580.141212
G. Tamilselvan, A. Shanmugam
{"title":"Fuzzy-Logic Based Medium Access Control Model for Battery Lifetime Enhancement in Wireless Body Area Networks","authors":"G. Tamilselvan, A. Shanmugam","doi":"10.4103/0976-8580.141212","DOIUrl":"https://doi.org/10.4103/0976-8580.141212","url":null,"abstract":"Wireless body sensor networks in healthcare system operate under mismatched conditions. Our aim is to improve the battery lifetime of body sensors while guaranteeing the reliable, timely message delivery and reduced packet delay, which is significantly important for the patient monitoring networks. In this paper, Distributed Queuing Body Area Networks (DQBAN) protocol is introduced as an alternative enhancement to 802.15.4 medium access control (MAC). It includes cross-layer fuzzy-rule scheduling algorithm and energy-aware radio activation policies. The main idea is to amalgamate the fuzzy-logic system in each body sensors to deal with multiple cross-layer input variables of dissimilar nature and independent manner. It guarantees low energy consumption and suitable under coexisting scenarios. DQBAN MAC model has shown to achieve higher reliability than other possible MAC implementation.","PeriodicalId":53400,"journal":{"name":"Pakistan Journal of Engineering Technology","volume":"54 1","pages":"135"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91088487","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
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