... The Journal of Mathematics and Computer Science Vol .2 No.2 (2011) 208-221 Solving fuzzy diff... more ... The Journal of Mathematics and Computer Science Vol .2 No.2 (2011) 208-221 Solving fuzzy differential equations by Runge-Kutta method ... Abstract In this paper, we interpret a fuzzy differential equation (FDE) by using the strongly generalized differentiability concept. ...
All in-text references underlined in blue are linked to publications on ResearchGate, letting you... more All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately.
International Journal of Applied Operational Research - An Open Access Journal, 2019
Since the issue of low diameter in-pipe inspection microrobots is particularly important in micro... more Since the issue of low diameter in-pipe inspection microrobots is particularly important in microrobotics field, in this paper, the results of a study on the various built or designed microrobots are presented. The objective of our paper is the prioritizing of in-pipe microrobots because that is an important tool in medical and industrial applications. This study , which includes 7 types of in-pipe microrobots such as Dielectric, Ionic Polymeric Metal Composite, Electromagnetic, Phase-change actuator, Piezoelectric actuator, Pneumatic actuator and Shape Memory Alloy actuator compares with some criteria such as the consuming power, response time, efficiency, dynamical modeling, producing force and manufacturing. These criteria are provided by specialists in standard organizations. In here, Fuzzy Analytic Hierarchy Process method is used for the best mechanisms determination in each field and weight of each criteria and their importance is determined. This study assists the design of ...
Background and aims: Risk assessment is one of the most important issues in making safety industr... more Background and aims: Risk assessment is one of the most important issues in making safety industrial environments. Motor vehicle industries are one of the most unsafe industries that have many annual accidents. One of the most problems in the process of risk assessment is judgment about the effect of parameters of risk. The aim of the study is, safety risk assessment in motor vehicle industries by William Fine and ANP-DEMATEL. Methods: In this study, safety risk of the one of the bigest motor vehicle industries was assessed by William Fine. Then, the weight of parameter of risk was determined by ANPDEMATEL. Then, the result was combined by William fine. In the final stage the industrial was assessed with the obtain pattern again. Results: The result was showed, that by using William Fine method, the highest priority risks was the iron bath-cleaning unit (312) and steel structure (300). The results of combined William fine and ANP-DEMATEL pattern, the highest priority risk was the ir...
Differential advantage can gained in various ways including market segmentation, strong distribut... more Differential advantage can gained in various ways including market segmentation, strong distribution channels, product or service offering, selling approach, geographic location and manufacturing expertise. Finding a differential advantage in the market place is a major management challenge requiring both creative and analytical skills. This paper has dealt with the importance degree calculation of the four main factors which are considered by a property-liability insurance policy buyer in selecting insurer by Analytic Network Process (ANP). These factors include: availability of coverage, cost of coverage, financial stability of insurer, quality and quantity of service offered. As these factors are all interrelated so we utilized ANP model to prioritize them and help decision makers how to allocate their resources in order to increase their market share. In this research we synthesized property and liability insurance buyers' views with experts' perceptions. So providing an...
Introduction: Biorhythm is one of the newest subject in the field of cognition of mental ergonomi... more Introduction: Biorhythm is one of the newest subject in the field of cognition of mental ergonomics which can be very effective in reduction of work-related accidents or mistakes with no apparent reason. . Material and Method: This research is a cross-sectional, retrospective, practical and analytical-descriptive study. Delijan cement production company during 2010-2011. Census method was applied and totally 79 accidents (total of the accidents) were investigated. The required information was collected from available documents in HSE unit of the company biorhythm charts were drawn based on a dates of accidents and participants birthdays, using Natural Biorhythm Software V3.02. Human errors were classified according to reason model and were analyzed by SPSS-W software. . Result: The results of analysis showed that 40% of accidents have been accrued in usual days and the other 60% in critical days of biorhythm cycle. Regarding errors leading to accidents, it was observed that 95% of a...
Background and aims: In today's business world, managers use outsourcing strategy as tool to ... more Background and aims: In today's business world, managers use outsourcing strategy as tool to establish competitive advantage and business capabilities in order to subcontract some activities and tasks to qualified contractors. Selecting the fittest contractor from qualified contractors can prevents waste of resource and keeps organizational resource. With regard to complexities, risks and conditions of oil industry, one of main criteria to select contractor in this industry is safety. In addition to such criteria as affordability, experience, specialized human resource, etc., the contractor should have acceptable health and safety executive (HSE) and appropriate performance. This study aims to determine contractor selection model by means of combined DEMATEL and ANP methods and grey relational analysis by safety approach. Methods: In this study we want to use combined DEMATEL and ANP methods and grey relational analysis approach in order to rank criteria and to select best contractor (case study in oil industry), while developing conceptual structure, we can minimize qualification and effect of assessor's personal judgment in evaluation process and contractor selection. Results: The results of this study show that main safety indexes to select contractor in oil industry are safety history and investment in safety sections. Conclusion: This matter indicates (a) risks of this industry and (b) effect of safety education and effect of investment (in other sections) on performance of other sections and entire organization.
Introduction: Occupational accidents are of the main issues in industries. It is necessary to ide... more Introduction: Occupational accidents are of the main issues in industries. It is necessary to identify the main root causes of accidents for their control. Several models have been proposed for determining the accidents root causes. FTA is one of the most widely used models which could graphically establish the root causes of accidents. The non-linear function is one of the main challenges in FTA compliance and in order to obtain the exact number, the meta-heuristic algorithms can be used. Material and Method: The present research was done in power plant industries in construction phase. In this study, a pattern for the analysis of human error in work-related accidents was provided by combination of neural network algorithms and FTA analytical model. Finally, using this pattern, the potential rate of all causes was determined. Result: The results showed that training, age, and non-compliance with safety principals in the workplace were the most important factors influencing human er...
Introduction: Electrical industries are among high risk industries. The present study aimed to as... more Introduction: Electrical industries are among high risk industries. The present study aimed to assess safety risk in electricity distribution processes using ET&BA technique and also to compare with both VIKOR & TOPSIS methods in fuzzy environments. Material and Method: The present research is a descriptive study and ET&BA worksheet is the main data collection tool. Both Fuzzy TOPSIS and Fuzzy VIKOR methods were used for the worksheet analysis.
Disasters are one of the most important challenges which must be considered by every management s... more Disasters are one of the most important challenges which must be considered by every management system. Higher education centers have high disaster risk because of their risk factors (existence of historical and scientific documents and resources and expensive laboratory equipment in these centers emphasizes the importance of disaster management). Moreover, the existence of young volunteers of human resources in universities urges the necessity of making these people familiar with disaster management rules and responses in emergency conditions. Creating appropriate tools for disaster management assessment makes it correct and precise in higher education systems using the presented conceptual model. The present model was planned so as to cover three phases which exist before, during, and after disaster. Studies were performed in one of the largest higher education centers in Tehran: Science and Research Branch of Islamic Azad University Campus. Results showed high-risk disasters in t...
... The Journal of Mathematics and Computer Science Vol .2 No.2 (2011) 208-221 Solving fuzzy diff... more ... The Journal of Mathematics and Computer Science Vol .2 No.2 (2011) 208-221 Solving fuzzy differential equations by Runge-Kutta method ... Abstract In this paper, we interpret a fuzzy differential equation (FDE) by using the strongly generalized differentiability concept. ...
All in-text references underlined in blue are linked to publications on ResearchGate, letting you... more All in-text references underlined in blue are linked to publications on ResearchGate, letting you access and read them immediately.
International Journal of Applied Operational Research - An Open Access Journal, 2019
Since the issue of low diameter in-pipe inspection microrobots is particularly important in micro... more Since the issue of low diameter in-pipe inspection microrobots is particularly important in microrobotics field, in this paper, the results of a study on the various built or designed microrobots are presented. The objective of our paper is the prioritizing of in-pipe microrobots because that is an important tool in medical and industrial applications. This study , which includes 7 types of in-pipe microrobots such as Dielectric, Ionic Polymeric Metal Composite, Electromagnetic, Phase-change actuator, Piezoelectric actuator, Pneumatic actuator and Shape Memory Alloy actuator compares with some criteria such as the consuming power, response time, efficiency, dynamical modeling, producing force and manufacturing. These criteria are provided by specialists in standard organizations. In here, Fuzzy Analytic Hierarchy Process method is used for the best mechanisms determination in each field and weight of each criteria and their importance is determined. This study assists the design of ...
Background and aims: Risk assessment is one of the most important issues in making safety industr... more Background and aims: Risk assessment is one of the most important issues in making safety industrial environments. Motor vehicle industries are one of the most unsafe industries that have many annual accidents. One of the most problems in the process of risk assessment is judgment about the effect of parameters of risk. The aim of the study is, safety risk assessment in motor vehicle industries by William Fine and ANP-DEMATEL. Methods: In this study, safety risk of the one of the bigest motor vehicle industries was assessed by William Fine. Then, the weight of parameter of risk was determined by ANPDEMATEL. Then, the result was combined by William fine. In the final stage the industrial was assessed with the obtain pattern again. Results: The result was showed, that by using William Fine method, the highest priority risks was the iron bath-cleaning unit (312) and steel structure (300). The results of combined William fine and ANP-DEMATEL pattern, the highest priority risk was the ir...
Differential advantage can gained in various ways including market segmentation, strong distribut... more Differential advantage can gained in various ways including market segmentation, strong distribution channels, product or service offering, selling approach, geographic location and manufacturing expertise. Finding a differential advantage in the market place is a major management challenge requiring both creative and analytical skills. This paper has dealt with the importance degree calculation of the four main factors which are considered by a property-liability insurance policy buyer in selecting insurer by Analytic Network Process (ANP). These factors include: availability of coverage, cost of coverage, financial stability of insurer, quality and quantity of service offered. As these factors are all interrelated so we utilized ANP model to prioritize them and help decision makers how to allocate their resources in order to increase their market share. In this research we synthesized property and liability insurance buyers' views with experts' perceptions. So providing an...
Introduction: Biorhythm is one of the newest subject in the field of cognition of mental ergonomi... more Introduction: Biorhythm is one of the newest subject in the field of cognition of mental ergonomics which can be very effective in reduction of work-related accidents or mistakes with no apparent reason. . Material and Method: This research is a cross-sectional, retrospective, practical and analytical-descriptive study. Delijan cement production company during 2010-2011. Census method was applied and totally 79 accidents (total of the accidents) were investigated. The required information was collected from available documents in HSE unit of the company biorhythm charts were drawn based on a dates of accidents and participants birthdays, using Natural Biorhythm Software V3.02. Human errors were classified according to reason model and were analyzed by SPSS-W software. . Result: The results of analysis showed that 40% of accidents have been accrued in usual days and the other 60% in critical days of biorhythm cycle. Regarding errors leading to accidents, it was observed that 95% of a...
Background and aims: In today's business world, managers use outsourcing strategy as tool to ... more Background and aims: In today's business world, managers use outsourcing strategy as tool to establish competitive advantage and business capabilities in order to subcontract some activities and tasks to qualified contractors. Selecting the fittest contractor from qualified contractors can prevents waste of resource and keeps organizational resource. With regard to complexities, risks and conditions of oil industry, one of main criteria to select contractor in this industry is safety. In addition to such criteria as affordability, experience, specialized human resource, etc., the contractor should have acceptable health and safety executive (HSE) and appropriate performance. This study aims to determine contractor selection model by means of combined DEMATEL and ANP methods and grey relational analysis by safety approach. Methods: In this study we want to use combined DEMATEL and ANP methods and grey relational analysis approach in order to rank criteria and to select best contractor (case study in oil industry), while developing conceptual structure, we can minimize qualification and effect of assessor's personal judgment in evaluation process and contractor selection. Results: The results of this study show that main safety indexes to select contractor in oil industry are safety history and investment in safety sections. Conclusion: This matter indicates (a) risks of this industry and (b) effect of safety education and effect of investment (in other sections) on performance of other sections and entire organization.
Introduction: Occupational accidents are of the main issues in industries. It is necessary to ide... more Introduction: Occupational accidents are of the main issues in industries. It is necessary to identify the main root causes of accidents for their control. Several models have been proposed for determining the accidents root causes. FTA is one of the most widely used models which could graphically establish the root causes of accidents. The non-linear function is one of the main challenges in FTA compliance and in order to obtain the exact number, the meta-heuristic algorithms can be used. Material and Method: The present research was done in power plant industries in construction phase. In this study, a pattern for the analysis of human error in work-related accidents was provided by combination of neural network algorithms and FTA analytical model. Finally, using this pattern, the potential rate of all causes was determined. Result: The results showed that training, age, and non-compliance with safety principals in the workplace were the most important factors influencing human er...
Introduction: Electrical industries are among high risk industries. The present study aimed to as... more Introduction: Electrical industries are among high risk industries. The present study aimed to assess safety risk in electricity distribution processes using ET&BA technique and also to compare with both VIKOR & TOPSIS methods in fuzzy environments. Material and Method: The present research is a descriptive study and ET&BA worksheet is the main data collection tool. Both Fuzzy TOPSIS and Fuzzy VIKOR methods were used for the worksheet analysis.
Disasters are one of the most important challenges which must be considered by every management s... more Disasters are one of the most important challenges which must be considered by every management system. Higher education centers have high disaster risk because of their risk factors (existence of historical and scientific documents and resources and expensive laboratory equipment in these centers emphasizes the importance of disaster management). Moreover, the existence of young volunteers of human resources in universities urges the necessity of making these people familiar with disaster management rules and responses in emergency conditions. Creating appropriate tools for disaster management assessment makes it correct and precise in higher education systems using the presented conceptual model. The present model was planned so as to cover three phases which exist before, during, and after disaster. Studies were performed in one of the largest higher education centers in Tehran: Science and Research Branch of Islamic Azad University Campus. Results showed high-risk disasters in t...
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