International Journal of Engineering - Transactions C: Aspects最新文献_第4页

The Effect of Material Properties on Sensitivity of the Microelectromechanical Systems Piezoelectric Hydrophone 材料特性对微机电系统压电水听器灵敏度的影响

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-10-06 DOI: 10.5829/ije.2017.30.12c.05

M. S. Nateri, B. Ganji

引用次数: 2

Optimum Design of a Coir Fiber Biocomposite Tube Reinforced with Nano Silica and Nano Clay Powder 纳米二氧化硅和纳米粘土粉增强椰壳纤维生物复合材料管的优化设计

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.11

A. Khalkhali, S. Daghighi

引用次数: 3

Cycle Time Reduction and Runtime Rebalancing by Reallocating Dependent Tasks 通过重新分配依赖任务来减少周期时间和运行时再平衡

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.03

M. Yaghoubi, M. Zahedi

{"title":"Cycle Time Reduction and Runtime Rebalancing by Reallocating Dependent Tasks","authors":"M. Yaghoubi, M. Zahedi","doi":"10.5829/ije.2017.30.12c.03","DOIUrl":"https://doi.org/10.5829/ije.2017.30.12c.03","url":null,"abstract":"Business Process Management Systems (BPMS) is a complex information system that provides designing, administrating, and improving the business processes. Task allocation to human resources is one of the most important issues which should be managed more efficiently in BPMS. Task allocation algorithms are defined in order to meet the various policies of organizations. The most important of these policies could be reducing the average cycle time, balancing the resource workload, increasing the product quality and minimizing the production costs. Therefore, choosing an appropriate resource in task allocation algorithms could influence on overall policy of the organization. In heavy load conditions or when the number of human resources is limited, workload balancing can increase the stability of the system. In this paper, a task allocation algorithm is proposed to rebalance the resource workload in runtime while minimizing cycle time by offering dependent pair tasks to resources for concurrent processing. The experimental results show that the combination of previous algorithms with the proposed algorithms would have 4.42% reduction in cycle time in contrast to most efficient state-of-the-art algorithms.","PeriodicalId":14066,"journal":{"name":"International Journal of Engineering - Transactions C: Aspects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82244521","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

Statistical Analysis of the Railway Accidents Causes in Iran (TECHNICAL NOTE) 伊朗铁路事故原因统计分析(技术说明)

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.02

I. Bargegol, V. N. M. Gilani, M. Abolfazlzadeh

{"title":"Statistical Analysis of the Railway Accidents Causes in Iran (TECHNICAL NOTE)","authors":"I. Bargegol, V. N. M. Gilani, M. Abolfazlzadeh","doi":"10.5829/ije.2017.30.12c.02","DOIUrl":"https://doi.org/10.5829/ije.2017.30.12c.02","url":null,"abstract":"The occurrences of accidents on the railways are inevitable in today’s world and the factors which may cause it, except the atmospheric and accidental ones, are identified and preventable as well. Therefore, these factors can be investigated and useful actions can be performed in order to reduce these accidents. The main impetus of the present research is the statistical analysis of the causes of railway accidents in Iran. Our achievement illustrates that except the train collision accidents with vehicles, all the accidents vary upon a sixth order curve which means the instability and unpredictability of the railway accidents during the last years. According to the performed studies, it is clarified that the railway accidents during the 10 years from 2000 to 2010 have not had a stable flow and have been under fluctuations and each of the kinds and causes of the accidents has its own contribution to the occurrence of these railway related happenings. Based on the analyses, derailment is the major factor of the various railway accidents and it includes about 55% of these accidents. Damage to people and collisions with non-rail vehicles are placed in the second category. Hereupon, efforts must be made by providing the necessary equipment for the simple access of the people beyond the lines such as pedestrian bridges in order to reduce the railway accidents.","PeriodicalId":14066,"journal":{"name":"International Journal of Engineering - Transactions C: Aspects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76869260","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

Design and Development of High Gain, Low Profile and Circularly Polarized Cavity-backed Slot Antennas Using High-order Modes of Square Shaped Substrtae Integrated Waveguide Resonator 基于方形基板集成波导谐振器高阶模态的高增益、低轮廓、圆极化腔背槽天线的设计与开发

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.04

A. Soltan, M. H. Neshati

引用次数: 0

Pareto-based Multi-criteria Evolutionary Algorithm for Parallel Machines Scheduling Problem with Sequence-dependent Setup Times 基于pareto的多准则进化算法求解序列相关的并行机调度问题

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.07

J. R. Zeidi, M. Zarei, Keyvan Shokoufi

{"title":"Pareto-based Multi-criteria Evolutionary Algorithm for Parallel Machines Scheduling Problem with Sequence-dependent Setup Times","authors":"J. R. Zeidi, M. Zarei, Keyvan Shokoufi","doi":"10.5829/ije.2017.30.12c.07","DOIUrl":"https://doi.org/10.5829/ije.2017.30.12c.07","url":null,"abstract":"This paper addresses an unrelated multi-machine scheduling problem with sequence-dependent setup time, release date and processing set restriction to minimize the sum of weighted earliness/tardiness penalties and the sum of completion times, which is known to be NP-hard. A Mixed Integer Programming (MIP) model is proposed to formulate the considered multi-criteria problem. Also, to solve the model for real-sized applications, a Pareto-based algorithm, namely controlled elitism non-dominated sorting genetic algorithm (CENSGA), is proposed. To validate its performance, the algorithm is examined under six performance metric measures, and compared with a Pareto-based algorithm, namely NSGA-II. The results are statistically evaluated by the Mann–Whitney test and t-test methods. From the obtained results based on the t-test, the proposed CENSGA significantly outperforms the NSGA-II in four out of six terms. Additionally, the statistical results from Mann–Whitney test show that the performance of the proposed CENSGA is better than the NSGA- II in two out of six terms. Finally, the experimental results indicate the effectiveness of the proposed algorithm for different problems.","PeriodicalId":14066,"journal":{"name":"International Journal of Engineering - Transactions C: Aspects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85684360","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

Modeling and Optimization of Roll-bonding Parameters for Bond Strength of Ti/Cu/Ti Clad Composites by Artificial Neural Networks and Genetic Algorithm 基于人工神经网络和遗传算法的Ti/Cu/Ti复合材料滚接参数建模与优化

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.10

M. Jafari, G. Khayati, M. Hosseini, H. Daneshmanesh

引用次数: 10

Stabilization of Electrostatically Actuated Micro-pipe Conveying Fluid Using Parametric Excitation 基于参数激励的静电微管输送流体稳定化研究

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.13

B. Abbasnejad, R. Shabani, G. Rezazadeh

{"title":"Stabilization of Electrostatically Actuated Micro-pipe Conveying Fluid Using Parametric Excitation","authors":"B. Abbasnejad, R. Shabani, G. Rezazadeh","doi":"10.5829/ije.2017.30.12c.13","DOIUrl":"https://doi.org/10.5829/ije.2017.30.12c.13","url":null,"abstract":"This paper investigates the parametric excitation of a micro-pipe conveying fluid suspended between two symmetric electrodes. Electrostatically actuated micro-pipes may become unstable when the exciting voltage is greater than the pull-in value. It is demonstrated that the parametric excitation of a micro-pipe by periodic (ac) voltages may have a stabilizing effect and permit an increase of the steady (dc) component of the actuation voltage beyond the pull-in value. Mathieu type equation of the system is obtained by applying Taylor series expansion and Galerkin method to the nonlinear partial differential equation of motion. Floquet theory is used to extract the transition curves and stability margins in physical parameters space (Vdc-Vac). In addition, the stability margins are plotted in flow velocity and excitation amplitude space (u-Vac space). The results depict that the micro-pipe remains stable even if the flow velocity is more than the critical value for a certain dc voltage. For instance, in absence of the (ac) component, it is shown that pull-in voltages associated to critical velocities 3 and 6 are 14.06 and 5.4 volt, respectively. However, transition curves show that superimposing an (ac) component with forcing frequency Ω=10 increases the pull-in voltage beyond these values. Furthermore, for the present pull-in voltages the critical velocities 3 and 6 could be increases with imposing some (ac) component. These results are discussed in detail in simulation results section where the transion curves are ploted quantitatively.","PeriodicalId":14066,"journal":{"name":"International Journal of Engineering - Transactions C: Aspects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90062699","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

An Adaptive Fuzzy Neural Network Model for Bankruptcy Prediction of Listed Companies on the Tehran Stock Exchange 德黑兰证券交易所上市公司破产预测的自适应模糊神经网络模型

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.09

A. Azadnia, A. Siahi, M. Motameni

引用次数: 4

Relationship between Pedestrians’ Speed, Density and Flow Rate of Crossings through Urban Intersections (Case Study: Rasht Metropolis) (RESEARCH NOTE) 城市交叉口行人速度、密度与交叉口流量的关系研究(以拉什特市为例)

International Journal of Engineering - Transactions C: Aspects Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.12c.01

I. Bargegol, V. N. M. Gilani, F. Jamshidpour

{"title":"Relationship between Pedestrians’ Speed, Density and Flow Rate of Crossings through Urban Intersections (Case Study: Rasht Metropolis) (RESEARCH NOTE)","authors":"I. Bargegol, V. N. M. Gilani, F. Jamshidpour","doi":"10.5829/ije.2017.30.12c.01","DOIUrl":"https://doi.org/10.5829/ije.2017.30.12c.01","url":null,"abstract":"Travels within the city are done in different ways, by vehicle or on foot. Thus, inevitably, a part of the travel is always done on foot. Since intersections as traffic nodes are determinant factor in transportation network capacity, any disruption in them leads to severe reduction in network capacity. Unfortunately, pedestrian behavior has received little attention in Iran. While this is a very important and effective part of traffic engineering. In some cases, pedestrians are the main cause of increasing road users’ delay, therefore, the most important action before anything, is identifying the characteristics of pedestrians. Identifying issues such as speed, volume and density of pedestrians are necessary to control the traffic flow and delay, and can lead to better design of facilities associated with pedestrians. Cases that are studied in this study are: the relationship between speed, density and pedestrians’ flow rate while crossing the street. In this study, the data was collected by filming four intersections in Rasht Metropolis for 15 hours, and the number of pedestrians crossing that were studied was 8489. Two intersections had traffic lights and the other ones had no traffic lights. Then, the relationship between speed, density and volume of pedestrians were obtained by determining the variables of speed, density and volume of pedestrians and using linear and nonlinear regression method and finding the correlation coefficient between the variables. The results showed that for pedestrians, there is a relationship between the flow rate and density with a high correlation coefficient in crossing through crosswalk (R2=0.99) and outside the crosswalk (R2=0.99). But the relationship between speed and flow rate was not significant (crossing through crosswalk, R2=0.29 and outside the crosswalk, R2=0.24); furthermore, speed and density had no significant relationship (crossing through crosswalk, R2=0.36 and outside the crosswalk, R2=0.28).","PeriodicalId":14066,"journal":{"name":"International Journal of Engineering - Transactions C: Aspects","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90411533","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: 17