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Articles 1 - 30 of 189
Full-Text Articles in Engineering
C.V. - Wojciech Budzianowski, Wojciech M. Budzianowski
Renewable Energy And Sustainable Development (Resd) Group, Wojciech M. Budzianowski
Renewable Energy And Sustainable Development (Resd) Group, Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Procesy Cieplne I Aparaty (Lab), Wojciech M. Budzianowski
On Convergence Analysis Of Dual Proximal-Gradient Methods With Approximate Gradient For A Class Of Nonsmooth Convex Minimization Problems, Sanming Liu, Zhijie Wang, Chongyang Liu
On Convergence Analysis Of Dual Proximal-Gradient Methods With Approximate Gradient For A Class Of Nonsmooth Convex Minimization Problems, Sanming Liu, Zhijie Wang, Chongyang Liu
Chongyang Liu
In this paper, we consider the problem of minimizing a nonsmooth convex objective which is the sum of a proper, nonsmooth, closed, strongly convex extend real-valued function with a proper, nonsmooth, closed, convex extend real-valued function.
Nonlinear 3d Finite Element Modeling For Structural Failure Analysis Of Concrete Sleepers/Bearers At An Urban Turnout Diamond, Minh Vu, Sakdirat Kaewunruen, Mario Attard
Nonlinear 3d Finite Element Modeling For Structural Failure Analysis Of Concrete Sleepers/Bearers At An Urban Turnout Diamond, Minh Vu, Sakdirat Kaewunruen, Mario Attard
Sakdirat Kaewunruen
Railway urban turnout is a special track system used to divert a train from a particular direction or a particular track onto other directions or other tracks. It is a structural grillage system that consists of steel rails, points (or called “switches”), crossings, steel plates, rubber pads, insulators, fasteners, screw spikes, beam bearers (either tim- ber, polymer, steel, or concrete), ballast and formation. There are two types of turnouts, a conventional turnout and a tangential turnout. Standard conventional turnouts are designed typically for straight main line track. The combination of switch length, heel angle, and cross rate defines the turnout …
Inżynieria Chemiczna Lab., Wojciech M. Budzianowski
Consequence Analysis Of Bleve Scenario In The Propane Tank: Acase Study At Bandar Abbas Gas Condensate Refinery Of Iran, Saeed Nazari, Najmeh Karami, Hojjat Moghadam, Parvin Nasiri
Consequence Analysis Of Bleve Scenario In The Propane Tank: Acase Study At Bandar Abbas Gas Condensate Refinery Of Iran, Saeed Nazari, Najmeh Karami, Hojjat Moghadam, Parvin Nasiri
Innovative Research Publications IRP India
The occurrence of incidents resulting from chemical releases requires preparatory measures. Despite special layers of protection in chemicalindustries to avoid such releases and subsequent consequences, human errors still occur and negatively contribute to failures in different activities include maintenance practices and operating control and so on. It is proven that one of the most devastating risk in the oil and gas companies is explosion, particularly BLEVE. Thus, the study of this phenomena and analysis of its consequences at various stages is necessary. Recent studies claimed that the predictionof damaging effectafter the explosion by mathematical models is necessary for its effective …
Microstructure And Wear Behavior Of As Cast Al-25mg2si-2cu-2ni Alloy, Geetanjali S. Guggari, Veena. Badiger, Dr. Shivakumar S
Microstructure And Wear Behavior Of As Cast Al-25mg2si-2cu-2ni Alloy, Geetanjali S. Guggari, Veena. Badiger, Dr. Shivakumar S
Innovative Research Publications IRP India
The remarkable feature of the Aluminium is its low density and ability to withstand corrosion effect due to phenomenon of passivation. Structural components made from Aluminium and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials. The oxides and sulphate are useful compounds of Aluminium based on its weight. In this work, an attempt has been made to utilize the combined effect of high cooling rate solidification, unique micro structural evolution mechanism of T6 heat treatment the advantages of hypereutectic Al-Si system alloyed with other elements such as Cu, Fe …
Problem Tree & Italian Transport Companies, Sajjad Khaksari
Problem Tree & Italian Transport Companies, Sajjad Khaksari
SAJJAD KHAKSARI
Slides of Report: Production System Analysis & Italian Transport Companies; A briefly endeavor to modeling, 3th edition; Problem Tree; Production Functions (PF's); Organization Chart; Information Pattern; Standard Time; Make-span (MS); Modeling; DM's; Work Sequence; Report; Table of Agents; Table of Resources; Production System Analysis & Italian Transport CompaniesCourse of Prof. Agostino Villa; Politecnico di Torino, Student: Sajjad Khaksari; June 11, 2015;
An Integrated Gray-Fuzzy Cause And Effect Approach To Determine The Most Significant Categories Of Project Risks, Amin Vafadarnikjoo, Mohammadsadegh Mobin, Christian Salmon, Nikbakhsh Javadian
An Integrated Gray-Fuzzy Cause And Effect Approach To Determine The Most Significant Categories Of Project Risks, Amin Vafadarnikjoo, Mohammadsadegh Mobin, Christian Salmon, Nikbakhsh Javadian
Mohammadsadegh Mobin
Identifying critical risks in projects has become a core step in project risk management process; however, the nature of this step can be complex and unstructured, suggesting a benefit in research towards prioritizing project risks on the basis of a cogent method. This paper presents a Gray Decision Making Trial and Evaluation Laboratory (GDEMATEL) method for prioritizing sources of project risk within a multi-criteria decision making (MCDM) framework. The framework categorizes sources of risk via the Project Management Institutes’ (PMI) Risk Breakdown Structure (RBS). For this study, project expert judgments and preferences are the source of knowledge about project risk. …
An Integrated Ahp-Gis-Mclp Method To Locate Bank Branches, Sajjad Allahi, Mohammadsadegh Mobin, Amin Vafadarnikjoo, Christian Salmon
An Integrated Ahp-Gis-Mclp Method To Locate Bank Branches, Sajjad Allahi, Mohammadsadegh Mobin, Amin Vafadarnikjoo, Christian Salmon
Mohammadsadegh Mobin
One of the most crucial decision making processes in banking is optimally locating new branches. This issue is highly important especially for private banks due to vibrant competition, limited budgets and high customer expectations. This study’s objective is to provide an integrated model for selecting optimal site location using available data sources and well accepted decision models, specifically Analytic Hierarchy Process (AHP), Geographic Information System (GIS) and Maximal Covering Location Problem (MCLP).As a case study, we applied the proposed method for branch location of a private bank in the city of Rasht, Iran. The process identified the most commonly used …
Global Sensitivity Analysis Applied To Model Inversion Problems: A Contribution To Rail Condition Monitoring, René Schenkendorf, Jörn Groos
Global Sensitivity Analysis Applied To Model Inversion Problems: A Contribution To Rail Condition Monitoring, René Schenkendorf, Jörn Groos
René Schenkendorf
Rising demands on railroad infrastructure operator by means of profitability and punctuality call for advanced concepts of Prognostics and Health Management. Condition based preventive maintenance aims at strengthening the rail mode of transport through an optimized scheduling of maintenance actions based on the actual and prognosticated infrastructure condition, respectively. When applying model-based algorithms within the framework of Prognostics and Health Management unknown model parameters have to be identified first. Which of these parameters should be known as precisely as possible can be figured out systematically by a sensitivity analysis. A comprehensive global sensitivity analysis, however, might be prohibitive by means …
Investigating Cavitation Peening Parameters For Fatigue Performance Using Designed Experiment, Mohammadsadegh Mobin, Afshan Roshani, Mahmood Mobin, Ali Rastegari
Investigating Cavitation Peening Parameters For Fatigue Performance Using Designed Experiment, Mohammadsadegh Mobin, Afshan Roshani, Mahmood Mobin, Ali Rastegari
Mohammadsadegh Mobin
Mechanical surface enhancement techniques such as cavitation peening (CP) have various design parameters which can affect the fatigue performance of the part. In this study, a full factorial design of experiment is applied to investigate the effects of cavitation peening process parameters on the fatigue performance of carburized steel. These parameters include standoff distance, cavitation number, nozzle size, and exposure time. The response variables considered in this experiment include residual stress, surface roughness and austenitic ratio. Results obtained from full factorial design of experiment method were compared with the results from literature which applied Taguchi method. The comparison revealed that …
Aviation Technical Publication Content Management System Selection Using Integrated Fuzzy-Grey Mcdm Method, Ashley Skeete, Mohammadsadegh Mobin
Aviation Technical Publication Content Management System Selection Using Integrated Fuzzy-Grey Mcdm Method, Ashley Skeete, Mohammadsadegh Mobin
Mohammadsadegh Mobin
The development of commercial maintenance and overhaul manuals for aerospace engines is requisite for certification by the Federal Aviation Administration (FAA). Robust content management systems are used for authoring, publishing, and maintaining these manuals which must meet general industry standards as well as unique company requirements. Therefore, system selection is complex, requiring review of numerous criteria of both quantitative and qualitative nature and is highly dependent on expert judgment which includes uncertainty. In this paper, a major aerospace company was used as a case study for an integrated Fuzzy-Grey Multi-Criteria Decision Making (MCDM) methodology for the selection of a technical …
Performance Evaluation Of Tehran-Qom Highway Emergency Medical Service System Using Hypercube Queuing Model, Mohammadsadegh Mobin, Zhaojun Li, Maghsoud Amiri
Performance Evaluation Of Tehran-Qom Highway Emergency Medical Service System Using Hypercube Queuing Model, Mohammadsadegh Mobin, Zhaojun Li, Maghsoud Amiri
Mohammadsadegh Mobin
This paper studies the ambulance deployment of the Tehran-Qom highway emergency medical service (EMS) system. The response time of EMS to an emergency call can have impact on the users in terms of the life and death, and this performance metric is evaluated using the proposed hypercube queuing model. The model is based on spatially distributed queuing theory and Markovian analysis approximations, and it is one of the most effective approaches for analyzing emergency response systems. In this research, performance measures of the EMS including workloads and mean response times are evaluated using the hypercube model. Modification to the existing …
Topsis As A Method To Populate Risk Matrix Axes, Christian Salmon, Mohammadsadegh Mobin, Afshan Roshani
Topsis As A Method To Populate Risk Matrix Axes, Christian Salmon, Mohammadsadegh Mobin, Afshan Roshani
Mohammadsadegh Mobin
This research utilizes TOPSIS (a Multi-Criteria ranking methodology) to populate the axes of a risk matrix when modeling risk exposure onboard commercial fishing vessels with the intent to identify mitigating interventions in low risk settings for possible transfer to high risk settings. The specific hazard of interest is the release of refrigerants into confined spaces onboard commercial fishing vessels. The metrics of risk are: 1) expectation that refrigerants are released onboard vessels, and 2) consequence of releases that have occurred. To model expectation: data were collected on the United States’ commercial fisheries, including location and number of participating vessels. These …
Multi-Objective X-Bar Control Chart Design By Integrating Nsga-Ii And Data Envelopment Analysis, Mohammadsadegh Mobin, Zhaojun Li, Mahdi Massahi Khoraskani
Multi-Objective X-Bar Control Chart Design By Integrating Nsga-Ii And Data Envelopment Analysis, Mohammadsadegh Mobin, Zhaojun Li, Mahdi Massahi Khoraskani
Mohammadsadegh Mobin
Control charts are widely used in industry to establish and maintain statistical control of a process for quality improvement. Economic use of a control chart calls for designing the optimal parameters for sample size, sampling frequency, and the control limits for the chart. This paper investigates the X-bar control chart design through a two-stage multi-objective optimization process. The multi-objective formulation reflects the multiple objective needs in designing an X-bar control chart. For example, these objectives may include average run length when in statistical control, the type-I error, and the detection power. The optimization process first searches the Pareto Frontiers using …
Using Data Envelopment Analysis To Evaluate Technical Training Program For Maintenance Units, Innovative Research Publications Irp India, Nai-Chieh Wei, Tzu-Jou Liao, Chiung-Fen Chang And Shui-Cheung Cham
Using Data Envelopment Analysis To Evaluate Technical Training Program For Maintenance Units, Innovative Research Publications Irp India, Nai-Chieh Wei, Tzu-Jou Liao, Chiung-Fen Chang And Shui-Cheung Cham
Innovative Research Publications IRP India
Applying data envelope analysis (DEA), this study focuses on the influences of objectivity and subjectivity on aircraft maintenance supervision evaluation and inspection procedure; the aim is to improve overall logistic operation and training efficiency. Moreover, the results of this analysis will be helpful for making decisions in training, management, capability and competitiveness
Proximal Iterative Gaussian Smoothing Algorithm For A Class Of Nonsmooth Convex Minimization Problems, Sanming Liu, Zhijie Wang, Chongyang Liu
Proximal Iterative Gaussian Smoothing Algorithm For A Class Of Nonsmooth Convex Minimization Problems, Sanming Liu, Zhijie Wang, Chongyang Liu
Chongyang Liu
In this paper, we consider the problem of minimizing a convex objective which is the sum of three parts: a smooth part, a simple non-smooth Lipschitz part, and a simple non-smooth non-Lipschitz part.
Horizontal Well’S Path Planning: An Optimal Switching Control, Zhaohua Gong, Kok Lay Teo, Chongyang Liu, Enmin Feng
Horizontal Well’S Path Planning: An Optimal Switching Control, Zhaohua Gong, Kok Lay Teo, Chongyang Liu, Enmin Feng
Chongyang Liu
In this paper, we consider a three-dimensional horizontal well’s path planning problem, where the well’s path evolves as a combination of several constant-curvature smooth turn segments. The problem is formulated as an optimal switching control problem subject to continuous state inequality constraints. By applying the time-scaling transformation and constraint transcription in conjunction with local smooth approximation technique, the optimal switching control problem is approximated by a sequence of optimal parameter selection problems with only box constraints, each of which is solvable by gradient-based optimization techniques. The optimal path planning problems of the wells Ci-16-Cp146 and Jin27 in Liaohe oil field …
Intelligent Items Traceability System – Rfid Vs Qr, Masoud Shakiba, Mandeep Singh Jit Singh, Mardina Abdullah
Intelligent Items Traceability System – Rfid Vs Qr, Masoud Shakiba, Mandeep Singh Jit Singh, Mardina Abdullah
Masoud Shakiba
Nowadays traceability systems are an inseparable part of international business and are essential in manufacturing and supply chain management systems. The advantages of the traceability system are more obvious for products that are exported and those imported from overseas. Traceability is highly important in food management and for products with short expiry. In recent years there have been several investigations and publications on traceability systems criteria especially in the food industry in the US, Europe and Southeast Asia.
موضوعات تحقیق وپژوهش, Mahdi Amirzadeh
جزوه آموزشی نرم افزار مایکروسافت پراجکت2013, Mahdi Amirzadeh
جزوه آموزشی نرم افزار مایکروسافت پراجکت2013, Mahdi Amirzadeh
Dr.Mahdi Amirzadeh
No abstract provided.
موضوعات تحقیق, Mahdi Amirzadeh
فصل اول ارگونومی, Mahdi Amirzadeh
فصل دوم, Mahdi Amirzadeh
دستورالعمل تحقیق کلاسی فرهیختگان, Mahdi Amirzadeh
دستورالعمل تحقیق کلاسی فرهیختگان, Mahdi Amirzadeh
Dr.Mahdi Amirzadeh
No abstract provided.
دستورالعمل تحقیق کلاسی پیام نور, Mahdi Amirzadeh
دستورالعمل تحقیق کلاسی پیام نور, Mahdi Amirzadeh
Dr.Mahdi Amirzadeh
No abstract provided.
موضوعات تحقيق, Mahdi Amirzadeh
فصل اول, Mahdi Amirzadeh