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Open Access Article
1 - Solving Redundancy Allocation Problem with Repairable Components Using Genetic Algorithm and Simulation Method
M. ShahriariReliability optimization problem has a wide application in engineering area. One of the most important problems in reliability is redundancy allocation problem (RAP). In this research, we worked on a RAP with repairable components and k-out-of-n sub-systems structure. T MoreReliability optimization problem has a wide application in engineering area. One of the most important problems in reliability is redundancy allocation problem (RAP). In this research, we worked on a RAP with repairable components and k-out-of-n sub-systems structure. The objective function was to maximize system reliability under cost and weight constraints. The aim was determining optimal components number of each subsystem, including the optimal number of repairmen allocated to each subsystem. Because this model belongs to Np. Hard problem, we used genetic algorithm (GA) for solving the presented model and response surface methodology (RSM) was used for tuning of algorithm parameters. Also for calculating the reliability of each subsystem (and system reliability) we used a simulation method. Finally, a numerical example was solved to test the algorithm performance. Manuscript profile -
Open Access Article
2 - Electronic Contracts in Islamic Jurisprudence and Law in Iran
Kamran Khani Naser MarivaniWith establishment speed of computer systems, people in modern society are increasingly dependent on hardware and software systems. And when the demand for computer systems increased, the possibility of crisis and failure of the computer will increase. Thus, the reliabi MoreWith establishment speed of computer systems, people in modern society are increasingly dependent on hardware and software systems. And when the demand for computer systems increased, the possibility of crisis and failure of the computer will increase. Thus, the reliability of computer systems has become a key concern for our life. According to The IEEE defines, software reliability is probability of failure-free software operation for a specified period of time in a specified environment. The problem is that currently most accurate method of software has error, and unfortunately still cannot completely prevent all errors. And software maintenance cost and elimination of errors is expensive, and even because of these reasons may be allowed error to remain in the system. This has reduced the reliability of the software. Previous solutions and procedures to enhance software assurance in various elimination forecasting and fault tolerance techniques has problems such as the complexity of formal methods (nominal) single version and version redundancy techniques, testing costs and the reuse of software code changes. The aim of this study is provide a method to increase software reliability and redundancy without the complexity of the software. In this study emphasize on the use of the capabilities inherent in the algorithm to reduce the complexity of software. Manuscript profile -
Open Access Article
3 - Using a Hybrid NSGA-II to Solve the Redundancy Allocation Mmodel of Series-Parallel Systems
Mohammadreza Shahriari -
Open Access Article
4 - Solving a Joint Availability-Redundancy Optimization Model with Multistate Components and Metaheuristic Approach
A. H. Borhani Alamdari‎‎‎ M. Sharifiمشکل تخصیص افزونگی (RAP) یکی از مهمترین و کاربردی ترین مسائل در زمینه قابلیت اطمینان است. هدف از این مشکل یافتن پیکربندی مطلوب اجزای سیستم به منظور بهینه سازی قابلیت اطمینان سیستم تحت برخی محدودیت­ها است. در مدل کلاسیک، اجزای مولفه سیستم باینری است، به عنوان مثال، ه Moreمشکل تخصیص افزونگی (RAP) یکی از مهمترین و کاربردی ترین مسائل در زمینه قابلیت اطمینان است. هدف از این مشکل یافتن پیکربندی مطلوب اجزای سیستم به منظور بهینه سازی قابلیت اطمینان سیستم تحت برخی محدودیت­ها است. در مدل کلاسیک، اجزای مولفه سیستم باینری است، به عنوان مثال، هر مولفه آن است که آیا جزء در حال کار است یا هراب شده است. در مطالعات جدید تحقیقاتی، اجزاء به عنوان اجزاء چند حالته در نظر گرفته می شوند، به عنوان مثال، هر جزء می­تواند برخی از حالت­های عملکردی بینابینی از سالم تا خراب را دارا باشد. در این مقاله، ما بر روی مسئله RAP با اجزاء چند حالته کار کرده و نرخ عملکرد اجزاء در هر یک از حالت­های عملکردی با صرف هزینه و انجام فعالیت­های فنی و سازمانی قابل افزایش می­باشد. به دلیل آنکه مسئله تخصیص افزونگی از جمله مسائل سخت می­باشد، ما برای حل مدل ارائه شده از دو الگوریتم فراابتکاری ژنتیک و شبیه سازی تبرید استفاده کرده و همچنین از تابع مولد عمومی برای محاسبه قابلیت اطمینان سیستم استفاده کرده­ایم. Manuscript profile -
Open Access Article
5 - The Effects of Technical and Organizational Activities on Redundancy Allocation Problem with Choice of Selecting Redundancy Strategies Using the memetic algorithm
M. Sharifi MR. Shahriari A. Zaretalab -
Open Access Article
6 - Redundancy Allocation Optimization Based on the Fuzzy Universal Generating Function approach in the Series-Parallel Systems
Mohammadreza Shahriari -
Open Access Article
7 - An approach to fault detection and correction in design of systems using of Turbo codes
H. Hamidi -
Open Access Article
8 - Set a bi-objective redundancy allocation model to optimize the reliability and cost of the Series-parallel systems using NSGA II problem
M. R. Shahriari‎ -
Open Access Article
9 - Trajectory Tracking Control of a Novel Planner Continuum Robot
Seyed Shoja Amini ali keymasi khalaji -
Open Access Article
10 - Improving the Mean Time to Failure of the System with the New Architecture of the Main Node with the Replacement Node of Industrial Wireless Sensor Networks for Monitoring and Control using Markov Model
Ahmadreza Zamani Mohammad Ali Pourmina Ramin Shaghaghi Kandovan -
Open Access Article
11 - Pathology of Rumi Studies with an Emphasis on Western Studies and Redundant Studies in Iran
Mohsen IzadyarDue to the fact that during the past decade or so the studies and researches conducted on Rumi and his works of art has been on the rise in Iran and the West, the time is ripe that these number of researches with such an inclusive approach could be pathologically invest MoreDue to the fact that during the past decade or so the studies and researches conducted on Rumi and his works of art has been on the rise in Iran and the West, the time is ripe that these number of researches with such an inclusive approach could be pathologically investigated. This paper on Rumi studies tries to investigate on two areas on “Rumi Studies and West” as well as “Redundant Studies” during the studies relevant to such a great man of literature, culture, and mysticism of Iran, with an emphasis on academic studies, and the result has been the fact that Iranians are to blame concerning Rumi Studies and West and have neglected the means of cultural interaction with the West through Rumi; Also, in terms of transferring the concepts, information, and the Iranian research conclusions to the West, they have not taken any desirable actions so much that there has been a different image introduced to the West. Moreover, this paper declares the most prominent research plague about Rumi conducted in Iranian research and studies in the form of books, papers, theses, and research plans to be redundancy, parallelism, and plagiarism for which there are some solutions offered to get rid of these plagues and to prevent from further damages. Manuscript profile -
Open Access Article
12 - Joint Inspecting Interval Optimization and Redundancy Allocation Problem Optimization for Cold-Standby Systems with Non-Identical Components
Mani Sharifi -
Open Access Article
13 - Using NSGA II Algorithm for a Three Objectives Redundancy Allocation Problem with k-out-of-n Sub-Systems
mani sharifi Pedram Pourkarim Guilani mohammadreza shahriari -
Open Access Article
14 - Exact equations for the reliability and mean time to failure of 1-out-of-n cold-standby system with imperfect switching
Seyed Taghi Akhavan Niaki Afshin Yaghoubi -
Open Access Article
15 - Comparing Parallel Simulated Annealing, Parallel Vibrating Damp Optimization and Genetic Algorithm for Joint Redundancy-Availability Problems in a Series-Parallel System with Multi-State Components
Mani Sharifi Morteza Mousa Khani Arash Zaretalab -
Open Access Article
16 - Genetic Algorithm and Simulated Annealing for Redundancy Allocation Problem with Cold-standby Strategy
Aida Karimi Mani Sharifi Amirhossain Chambari -
Open Access Article
17 - Reliability Modelling of the Redundancy Allocation Problem in the Series-parallel Systems and Determining the System Optimal Parameters
Mani Sharifi Mohsen Yaghoubizadeh -
Open Access Article
18 - Placement of Phasor Measurement Units in Power Networks and Optimal Distribution of Measurement Redudancy
Ali Ansari Fariborz Haghighatdar FesharakiAbstract: In this thesis in addition to optimal placement of phasor measurement units (PMUs) a new method is proposed for optimal distribution of measurements redundancy. Since the buses having first order redundancy degrade the system observability by missing their mea MoreAbstract: In this thesis in addition to optimal placement of phasor measurement units (PMUs) a new method is proposed for optimal distribution of measurements redundancy. Since the buses having first order redundancy degrade the system observability by missing their measurements, this method is used to reduce the number of these. On the other hand, the proposed method, in spite of the previous methods, is used to enhance the system observability by improving the redundancy order of the other low order redundancy buses without increasing the number of the lower orders. .In addition, by using this method, the optimal PMU placement can be obtained considering the contingencies such as PMU outage or line outage. It should be noted that the proposed methods are implemented on the IEEE 14-, 30, 57- and 118- bus power networks. The simulation results are compared with previous methods. In addition, simulations are performed with and without considering the effect of zero injection buses. Manuscript profile -
Open Access Article
19 - A Systematic Approach to Sensitivity Analysis of Fault Tolerant Systems in NMR Architecture
Kourosh Aslansefat Gholamreza Latif ShabgahiA fault tree illustrates the ways through which a system fails. It states different ways in which combination of faulty components result in an undesired event in the system. Being used in phases such as designing and exploiting industrial systems, and the designers abl MoreA fault tree illustrates the ways through which a system fails. It states different ways in which combination of faulty components result in an undesired event in the system. Being used in phases such as designing and exploiting industrial systems, and the designers able to evaluate the dependability attributes such as reliability, MTTF and sensitivity. In addition, in the mentioned ability, the fault tree is a systematic method for finding systems bottlenecks and weakness point. In spite of its extensive use in evaluating the reliability of systems, fault tree is rarely used in calculating sensitivity. In the last decade, few researches has been conducted in this field, however these methods are not applicable to large scale systems and are not systematic. This paper provides a systematic method for evaluating system sensitivity through fault tree. Then, it introduces sensitivity of NMR architecture as one of the common structures of fault tolerance which is used for enhancing systems’ reliability, safety and availability in industry. This article presents a comprehensive and parameterized formula for NMR structure's sensitivity. The presented method can be a great help for designing and exploiting reliable systems engineers in systematic and instant calculation of sensitivity by means of fault tree. Manuscript profile -
Open Access Article
20 - Investigation of redundancy factor at buildings with nonparallel systems irregularity
azim bani jalali seyyed sina kourehli In this paper, the redundancy factor at buildings with nonparallel systems irregularity has been investigated. For this purpose, four concrete moment resisting frames with different heights and spans designed in ETABS software. Because of irregularity of the studi More In this paper, the redundancy factor at buildings with nonparallel systems irregularity has been investigated. For this purpose, four concrete moment resisting frames with different heights and spans designed in ETABS software. Because of irregularity of the studied buildings in plan, the story which resist more than 35% of the base shear in the direction of interest should be found. Then, loss of moment resistance at the beam-to-column connections at both ends of a single beam should be tested. The obtained results show that the story strength reduced less than 33% and the resulting system have not an extreme torsional irregularity. So, the redundancy factor at studied buildings is equal one. Manuscript profile -
Open Access Article
21 - An Efficient Fault-Tolerance Routing Algorithm for Mobile Ad-hoc Networks
Fatemeh Tavakoli Meisam Kamarei Gholam Reza Asgari -
Open Access Article
22 - Fault-tolerance Enhancement in Mobile Ad-hoc Networks Using Backup Nodes
Fatemeh Tavakoli Meisam Kamarei Gholam Reza Asgari -
Open Access Article
23 - Reliability optimization problems with multiple constraints under fuzziness
Neha Gupta Sanam Haseen Abdul Bari -
Open Access Article
24 - Redundancy allocation problem for k-out-of-n systems with a choice of redundancy strategies
Mahsa Aghaei Ali Zeinal Hamadani Mostafa Abouei Ardakan -
Open Access Article
25 - A redundancy allocation problem with the choice of redundancy strategies by a memetic algorithm
J Safari R Tavakkoli-Moghaddam -
Open Access Article
26 - Reliability Index For Reinforced Concrete Frames Using Nonlinear Pushover And Dynamic Analysis
Ahmad A. Fallah Abdoreza S. Moghadam Saeed Mohammadzadeh -
Open Access Article
27 - Managing spilt-attention and redundancy in multimedia learning environments:evidence for dual processing systems in working memory
Hamid Reza Hassanabadi Zohreh Sarmad Mahmoud Ghazi TabatabaeiThe purpose of this study was to modify split-attention and redundancy effects in multimedia learning environments by presenting the text in auditory form or by physically integrate the multiple sources of information. The topic of lightning formatio MoreThe purpose of this study was to modify split-attention and redundancy effects in multimedia learning environments by presenting the text in auditory form or by physically integrate the multiple sources of information. The topic of lightning formation was presented to middle school students via an animation (n=51). Concurrently with the animation, one group viewed on-screen text presented adjacent to the animation (textual concise group), the second group listened to a narration (narration concise group) and the third group received both on-screen text and the narration (redundant group). Learning about lightning formation was measured by retention and transfer tests. The narration group was outperformed the textual group in retention, revealing a modality effect. But students in redundant group performed worse on transfer test than did students who received concise formats, revealing a redundancy effect. The results are explained by a dual processing model of working memory and limited visual channel capacity. Theoretical and practical implications of the findings are discussed. Manuscript profile -
Open Access Article
28 - Fault-Tolerant Techniques for Quantum-dot Cellular Automata Circuits and Systems
Razieh Farazkish Mani Zarei -
Open Access Article
29 - Explain the factors affecting stock liquidity using genetic algorithm and minimum and maximum correlation (MRMR) methods
Mahmoud Rezaei Hossein Panahian Mahdi Madanchi Zaj Hasan GhodratiLiquidity of stocks is an important challenge in the capital market. Identifying the factors affecting liquidity helps to predict the stock liquidity situation and thus stock risk management. The purpose of this study is to find the factors affecting the liquidity of st MoreLiquidity of stocks is an important challenge in the capital market. Identifying the factors affecting liquidity helps to predict the stock liquidity situation and thus stock risk management. The purpose of this study is to find the factors affecting the liquidity of stocks. For this purpose, in the first stage, using the research literature and experts, the influencing factors are identified and using the methods of minimum redundancy and maximum correlation (MRMR) and genetic algorithm, the effective variables are selected. In this research, using Excel software and existing raw data, the required data was created and then using support software and neural network toolbox and support vector machine was created. . Finally, the extracted variables using MRMR include stock market value, intensity of product market competition, GDP growth, equity returns, stock returns, inflation rate and family ownership, and using the financial model of financial leverage, government ownership, Equity returns, GDP growth, share buoyancy percentage, market type and board (on the stock exchange and OTC), the intensity of competition in the product market were selected. Manuscript profile -
Open Access Article
30 - Impact of Bioclimatic Factors on Diversity Patterns in Quercus brantii (Persian Oak) Populations within the Western Iranian Forest Ecosystem
Adele Rafezi Mohammad Reza Azimi Mehrshad Zeinalabedini Mohammad reza Ghaffari -
Open Access Article
31 - An Intrusion Detection System for Network Cyber Security Using Hybrid Feature Selection Algorithms
Golnaz Aghaee Ghazvini zahra Oday KamilOne of the most important challenges of the expansion of the Internet and virtual space is cyber-attacks. These attacks are becoming new every day and it is becoming more difficult to deal with them. As a result, methods should be used to detect them, which can detect a MoreOne of the most important challenges of the expansion of the Internet and virtual space is cyber-attacks. These attacks are becoming new every day and it is becoming more difficult to deal with them. As a result, methods should be used to detect them, which can detect all types of cyber-attacks in the shortest possible time and with proper accuracy. Nowadays, machine learning methods are usually used to detect cyber-attacks. But since the data related to cyber-attacks have many characteristics and are kind of bulky data, as a result, the accuracy of conventional machine learning methods to detect them is usually low. In this research, we have used a hybrid feature selection method to select optimal features from the database related to cyber-attacks, which increases the accuracy of attack detection by classification models. In the proposed feature selection method, first the features that have the least redundancy with each other and at the same time are most related to the category variables (labels) are selected by the MRMR algorithm. Then, using a wrapper feature selection method based on the gray wolf optimization (GWO) algorithm to select a subset of the features selected from the previous step, which maximizes the accuracy of the SVM classifier model, is used this subset has optimal features by which the SVM model is trained. As a result, the accuracy of detecting cyber-attacks by the SVM model increases. According to the simulation results, the average accuracy of the proposed method for detecting cyber-attacks is 99.84%, which has improved compared to the intrusion detection methods of the reference article. Manuscript profile