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With the accelerated urbanization process in China, more and more attention has been paid to residential environment quality. How to improve atmospheric quality, accelerate pollutant emission and reduce resource consumption by rationalizing layout is one of the most important issues in developing a healthy community. Based on the method of fluent flow field simulation, this paper chooses and analyzes...
Dual-active-bridge (DAB) DC-DC isolated converter is widely used in many applications e.g. power supplies, transportations and renewable power systems. In this paper, general modulation characterization and optimization of DAB converters have been analyzed and advanced modulation methods are proposed. Simulations and experiments are implemented to verify the effectiveness of the proposed modulation...
The objective of this work is to analyze and understand the operation of the elevators system, simulating and optimizing the traffic of individuals in elevators. Passive elements (queues) and active (processors/servers) are analyzed. A simulation methodology is developed for passive and active elements using the system methodology to discrete events. The heuristic method is used in an attempt to find...
In this paper, we present a short literature review on the studies and researches, especially recently, in the area of modeling of the trajectory-generating equipments of the five-axis CNC machines and modeling of the trajectory-generating mechanisms of the serial industrial robots. First we make a short introduction regarding the importance and the opportunity of using modeling and simulation techniques...
This paper presents a self-evolving scheme of an agent-based simulation to improve agent simulation models to fit real world data in an incremental way without human intervention by machine learning techniques. The proposed method can solve problems of traditional optimization methods of the agent-based simulation by the incremental optimization of agent simulation models. In this paper, we introduce...
The analysis of scientific simulation data enables scientists to derive insights from their simulations. This analysis of the simulation output can be performed at the same execution site as the simulation using the same resources or can be done at a different site. The optimal output frequency is challenging to decide and is often chosen empirically. We propose a mathematical formulation for choosing...
Production ramp-up refers to the period between the completion of product development and full capacity utilization. In semiconductor industry, engineering lots are given higher priority in the manufacturing process in order to improve the manufacturing process and/or to facilitate the new product development. However, the implementation of engineering lots can disrupt the smoothness of the manufacturing...
Reliability analysis of distribution systems has been attracting increasing attention. A special concern pertains to the distribution networks on which most failures occurs. The optimization of distribution system of breakers and power switches is a possible strategy to improve reliability. The paper describes development procedure for modelling restoring after a fault and calculating associated reliability...
Renewable energy hybrid system is one of the most promising, economical, and reliable option for electrifying rural areas. Hybrid energy Systems are being utilized for minimizing usage of fossil fuels to reduce environment effects. But analysis of Hybrid System is quit complex, therefore it requires software tools for design, analyze and optimization of software. The main objective of this paper is...
War-fighting simulation becomes an efficient method to assess war-fighting efficiency and verify war-fighting theory. In this paper, a novel missile war-fighting scheme optimization method is proposed based on ordinal optimization theory. This new method sets up the crude evaluation model and verifies the efficiency of the model. Simulation results demonstrate that the proposed method can achieve...
In this paper, we present the implications that the Lightly Doped Drain-LDD technique used for Metal Oxide Semiconductor-MOS fabrication of n-channel transistor has on different device parameters. The discussion focuses on the influence of the n- doping of drain, respectively source on the electric field, one of the most important issues of today's technology, but takes also into consideration another...
Early discharge of patients is frequently used as means to control the ratio of rejected incoming patients due to a full Intensive Care Unit. These patient discharge decisions are discussed in the medical literature but few mathematical works have included them in their models. Recently, pioneering works modeled these decisions and obtained different bed-control policies. The so-called cautious policy...
This paper presents a model in distributed parameters for a drying plant of cocoa beans. The plant is composed of a combustion chamber, an air fan thrust and a drying chamber integrated by a rotating cylinder. The model was developed in the EcosimPro® platform, in wich the process of simulation, sensitivity analysis and estimation of parameters were implemented. For the optimization and validation...
This paper models a traditional supply chain with three levels, manufacturer and retailer, for managing the orders and inventories of perishable products. A hybrid approach, based on systems dynamics and optimization, was used to reduce the bullwhip effect along the supply chain, increase fill rates and reduce total costs (order, inventory and stockout costs). The hybrid approach, with optimization,...
Stationary demand process is mostly an assumption in the problem of production/inventory control. The objective of this paper is to investigate the performance of non-stationary control policy and stationary control policy under the condition of non-stationary demand and to study the impact of forecasting on the system's performance in a failure-prone manufacturing system. The hedging-point-based...
Makeshift manufacturing approach can be characterized by unorganized process flow, improper layout and inadequate planning. Most of the SMEs in India adapt this approach for manufacturing their products. In this study one instance of a three wheeler (auto) manufacturing company named XYZ Auto is under study. For any auto manufacturing, chassis is a major part. In this paper, micro level studies of...
Context: Continuous Improvement in manufacturing to attain manufacturing excellence is today's requirement. It gives cutting edge over the competitors. This has developed lot of interest for the researchers during the last few years. Vehicle Assembly Line being the most complex Assembly line has been active area of research over years and has attracted many researchers.
The proliferation of the RFID (Radio-Frequency IDentification) technology in the last decade shows its importance as effective solution for a large variety of application scenarios, such as monitoring, homeland security, healthcare, logistic and last but not the least Internet of Things. Actually, an accurate RFID modeling, optimization and performance analysis via simulation is strongly desired....
A method to research the critical point and opinion leader in the evolution of public opinion is proposed. It is assumed that individuals have two attributes: the individual opinions and the persistence of them, which can be corrected by two additional factors: the level of trust and the range of experience between individuals. Using the above four properties of individuals, the interaction rules...
The paper presents and summarizes theoretical and practical results of the UEM-TUSUR project which is focused on the development of approaches, technologies and software for EMC simulation of unified electronic modules of spaceborne equipment. Theoretical and practical results for quasi-static and electromagnetic analysis, solution of linear algebraic systems and modal filtration are presented briefly...
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