Applied Mechanics and Materials Vols. 433-435

Abstract: A meshless element-free Galerkin method (EFGM) which is applicable to arbitrary shapes but requires only nodal data is applied to two-dimensional steady-state ground-coupled heat transfer problems. The soil layer around underground constructions is modeled as a homogeneous medium and as a layered soil with two layers. The calculation precision of EFGM is validated by comparing EFGM results with those obtained by finite element method (FEM). EFGM reduce considerably the preparation of the model. EFGM is very appropriate for the ground-coupled heat transfer problems.

Abstract: Building Information Modeling (BIM) is an innovative tool and Production Process,which is a typical application way of information technology in construction industry. The rapid development of BIM has brought about a gigantic revolution in construction industries of Europe and the United States and other developed countries. In China, only some big design institutes are or have been applying this technology.This paper concretely analyses the situation and the barrier of using BIM in China, expounds its application prospect in China based on the relationship between BIM technology and the related parties.

Abstract: This study explored the ventilation conditions of community atriums for selected housing prototypes in Tainan City, Taiwan. Employing field surveys and CFD simulations, the atrium ventilation of the selected housing building layouts were studied and compared. Through the CFD simulation using the common wind direction in the autumn of the study region, this study found that among the four community building layouts selected, the atrium space of the double-side opening townhouse building layout has the best outdoor ventilation. In addition, the study also revealed that when the arrangement of the building layout and the openings of the atrium are coordinated with the local wind environment, the outdoor ventilation will be significantly improved. Finally, this paper provides suggestions for building layouts and the design of community open space in order to enhances the ventilation of community atrium and its user comfort.

Abstract: Based on the investigation results of 40 operation projects of ground-source heat pump air-conditioning systems in Shandong, analyses the problems of ground source heat pump existed in project application and puts forward respective technical and management countermeasures, providing reference for other similar applications.

Abstract: Conduction transfer function (CTF) is widely used to calculate conduction heat transfer in building cooling/heating load and energy calculations. It can conveniently fit into any load and energy calculation techniques to perform conduction heat transfer calculations. There are two popular methods, direct root-finding (DRF) method and frequency-domain regression (FDR) method to calculate CTF coefficients. The limitation of methodology possibly results in imprecise or false CTF coefficients. This paper analyzes the errors of two methods to the material properties of a multilayer heavyweight building construction. The results show that the calculation error of DRF method becomes increasing as the wall characteristic parameter becomes increasing. The maximal error even reaches almost 100%. However, the calculation error of FDR method always remains within 1% no matter how the wall characteristic parameters are varied. Thus, FDR method is more robust and reliable than DRF method.

Abstract: This paper studies uniform parallel-machine scheduling problem with deteriorating jobs and rejection. The processing time of each job is a linear nondecreasing function of its starting time. A job can be rejected by paying a penalty cost. The objective is to minimize the sum of the total load of the accepted jobs on all machines and the total rejection penalties of the rejected jobs. We propose a fully polynomial-time approximation scheme (FPTAS) for this problem.

Abstract: In this paper, we study the NP-hard problem of schedulingjobs onuniform machines to minimize the total completion time of the accepted jobs and the total rejection penalty of the rejected jobs. Each job's processing time is a simple linear increasing function of its starting time. A job can be rejected by paying a penalty cost. We propose a fully polynomial-time approximation scheme (FPTAS) to show the problem is NP-hard in the ordinary sense.

Abstract: In the supply chain environment, manufacturing enterprises need to consider the availability of the manufacturing resources from suppliers in their plan. In this paper, through analysis to the BOM of supply chain environment, a new dynamic BOM model is proposed based on the manufacturing resources of supplier, its characteristics and key establishment points are discussed, and its application in the barrel of the washer is introduced.

Abstract: To address the uncertainty of production environment in aircraft engine assembly, an adaptive optimization scheduling algorithm is designed for an aircraft engine assembly line in knowledgeable manufacturing. A Q-learning adaptive scheduling model of aircraft engine assembly is built on the objective function of minimizing earliness penalty. Simulation experiments indicate that the proposed algorithm outperforms other scheduling rules much. Especially, better results are generally achieved with the increase in number of engines to show good adaptive performance.

Abstract: This study aims to assist the semiconductor assembly and testing industry in finding the best way of talent training. Firstly, the analysis of competency designs the training path according to engineers' different realms, introduces Case-Based Reasoning (CBR) combined with courses of the analysis of competency. Then, after the interview of professional engineers regarding their experiences, we analyze the courses' main factors, the degree of demand of instituting the courses, and finally set up the knowledge database of talent training. The results will inspire the training path for automation equipment and process and act as reference for the human resources department, reducing discrepancies between the tech and management department for required skills to equipment and manufacturing processing and enhancing the productive output.