Advanced Materials Research Vols. 433-440

Abstract: his paper provides a method for the communication between PLC and IPC using Profibus-DP bus. It introduces the setting steps on the software Simatic and Labview. Using EM277, S7-200 can communicate with S7-300.And based on OPC technology, Labview can send and receive control message to S7-300.Profibus-DP bus can quickly delivers control digitals from Labview to S7-200.And this system is used in some space project, and have good results.

Abstract: This paper proposes a new method for analyzing the fuzzy system reliability of a parallel-series and series-parallel systems using fuzzy confidence interval, where the reliability of each component of each system is unknown. To compute system reliability, we are estimated reliability of each component of the systems using fuzzy statistical data with both tools appropriate for modeling fuzzy data and suitable statistical methodology to handle these data. Numerical examples are given to compute fuzzy reliability and its cut set and the calculating was performed by using programming in software R.

Abstract: T-rough sets was introduced in [3]. Our aim in this paper is to introduce the concept of T-rough ideal , T-rough quotient ideal and T-rough fuzzy ideal and study on a set-valued homomorphism for semigroups. We generalized some theorems that they have been proved in [12].

Abstract: In this paper, buckling analysis of functionally graded (FG) thick beam under different conditions is presented. Based on the first order shear deformation theory, governing equations are obtained for Thimoshenko beam which is subjected to mechanical loads. In functionally graded materials (FGMs) the material properties obeying a simple power law is assumed to vary through thickness. In order to solve the buckling differential equations, Generalized Differential Quadrature Method (GDQM) is employed and thus a set of eigenvalue equations resulted. For solving this eigenvalue problem, a computer program was developed in a way that the influence of different parameters such as height to length ratio, various volume fraction functions and boundary conditions were included. Non-dimensional critical stress was calculated for simply-simply, clamped-simply and clamped-clamped supported beams. The results of GDQ method were compared with reported results from solving the Finite element too. The comparison showed the accuracy of obtained results clearly in this work.

Abstract: As energy of reader in Internet of things is limited, we can only decrease energy overhead of protocol and balance energy consumption among readers to extend the network lifetime as much as possible. Combining with characteristics of Internet of things and requirements of low-energy, energy-aware-based routing protocol was selected for wireless networking of readers. Three methods dealing with how to decrease the energy and how to prolong the wireless network’s life expectancy are proposed in this paper. They are power mode switch based on power control, data mining technique as well as indefinite prolonged transmission. Based on these low-energy measures, improved energy-aware-based routing protocol was designed and performance was simulated for analysis. Simulation results show that improved protocol is superior to original one in aspects of total energy cost and network lifetime.

Abstract: A controversial issue in the planning of air transportation networks is inclement weather. In this situation, hub facilities would not be able to provide a good service to their spoke nodes temporarily. Thus, some other kinds of predetermined underutilized facilities in the network are used as virtual hubs to host some or all connections of original hubs to recover the incurred incapacitation and increase network flexibility and demand flow.Here, we present a dynamic virtual hub location problem with the aim of minimizing transportation cost in the network. We examine the effectiveness of our model using the US well-known CAB data set.

Abstract: The shop-scheduling problem can be simply introduced as a problem of redistribution of resources or a problem of rearrangement of operation orders. Open shop scheduling problems (OSSP) are one of the most time-consuming works in scheduling problems. In other hand Optimization techniques have obtained much attention during the past decades. Particle Swarm Optimization (PSO) and Genetic Algorithm (GA) are the most important methods used to solve optimization problems such as Open Shop Scheduling. In this paper, a hybrid optimization algorithm (IPSO) is proposed to solve Open Shop Scheduling more efficiently and accurately. Most literature referring to OSSP focuses on the optimization of one single objective.This paper offered a mathematic model for OSSP with the goal of minimizing average completion time and the number of late jobs simultaneously. The proposed method was then compared whit the results of the LINGO software and GA. The results of this comparison show that IPSO can achieve better results for the solution in a faster time. Introduction

Abstract: Since the 1990s, the increasingly more fierce competitions and the changing-over market demands all over the world have pushed all kinds of enterprises to be faced with great pressures that they are necessary to constantly shorten the time of delivery, reduce all costs, increase the qualities of products and improve the services. For this reason, it is highly difficult for these enterprises to depend on their internal resources to cope with those great pressures, which just converts the service outsourcing into a major engine of the transnational investments. Furthermore, the software outsourcing, as a quite popular service outsourcing model at the international world at the present time, is highly more and more obvious to transfer to China. Under the circumstances, in this paper, the author tries conducting an argumentation analysis on the software outsourcing development of Liaoning province from the aspects of its regional environment, talent environment, industrial environment, and social environment, makes a conclusion on the advantages and disadvantages of the Liaoning province in the software outsourcing, and finally puts forward corresponding countermeasures and suggestions.

Abstract: The aim of this paper is to study the issues of the relationship between ERP implementation and BPR for manufacturing. This study pay attention to the literatures related to the relationship between BPR and ERP implementation, which were addressed by the researchers and practitioners. As both ERP and BPR follow organizational change, the researchers found that organizations must take a critical look on the collaboration among software vendors, consultants, processes, and organizations. Fine-tuning the integration can help successful BPR and ERP implementation.

Abstract: In this paper, a detailed energy and exergy analysis have been dealt with on experimental AAC (Automobile Air Conditioning) system with R134a as working refrigerant. For this aim, an experimental AAC system consisting of a laminated type evaporator, swash plate type compressor, a parallel flow type condenser, TXV(thermostatic expansion valve) and a receiver drier. The performance analysis of separate components of AAC system has been carried out under various compressor speeds and thermal loads. AAC system equipped with increasing compressor speed by three-phase electric motor controlled by frequency converter. Various thermal loads in the range of 1500 and 2850 W were applied to the system by means of electric heaters. The experiments were conducted at the condensing temperatures of 50-60 oC for each thermal load, and at the compressor speeds of 600, 800, 1000, 1200, 1400 rpm for each thermal load-condensing temperature combination. The refrigerant and air temperatures, refrigerant pressures, compressor speed, air velocity passing through the evaporator and thermal load were measured. Effects on system performance of such operational parameters as compressor speed, return air in the evaporator and condensing air temperatures have been experimentally evaluated and by means of energy and exergy analysis.