Advanced Materials Research Vols. 488-489

Abstract: The experimental studies of output power performances of a vertical-axis-wind-turbine (VAWT) had been conducted in suction-type low speed wind tunnel with various free stream velocity. Torque and rotation speed of blades were measured by using torque meter and optical detector to analyze the effect of blade-section shape on the performance of wind turbine. The test model of experiments in the research was H-rotor VAWT. Three shapes of the NACA 4-digital series blade-section, NACA0022, NACA6404, and NACA6422 were taken in this work. Effects of thickness and camber of blade-section, blade numbers, and blade setting angles on the performance of VAWT have been analyzed in detail. The results show that NACA6422 blade-section has rotation speed of 42% higher than that of NACA0022 when the free stream velocity is below 12 m/s and the blade numbers are 4-blade type. Wind turbines with NACA6422 blades also showed that about 10% higher output power than that of NACA0022 blades among the tested range of free stream velocity. Results indicated that wind turbine with blades of anti-symmetric and thick blade-section was generally more suitable for applying to VAWT. All results of this study can be used the optimization design of VAWT blades in further.

Abstract: This paper introduces methods of solving problems of environmental contamination and health hazard caused by organic chemistry by using green chemistry though, discusses green chemistry concept implemented in colleges and universities’ education of organic chemistry through methods including updating education and teaching idea, reorganizing teaching contents and optimizing teaching design, and through combining teaching practices, analyzes how to penetrate green chemistry into each teaching link by combining teaching contents, so as to better accomplish teaching tasks, broaden the scope of knowledge for students and foster modern green chemistry awareness and scientific research awareness of students.

Abstract: The paper explores the use of pineapple leaf fiber (PALF), banana stem fiber and kenaf fiber to produce paper has been done in order to find the alternative source and the method to recyle used newspaper. The decreasing of already material which is cause by the unstable ecosystem and taking long time to harvest. The alternative source can help to increase production of paper and reduce the cost of production. The experiments using PALF, banana stem fiber and kenaf fiber as raw material in paper production have been conducted to assess the advantages in terms of mechanical properties, especially tensile strength, tearing strength, thickness, and grammage of paper. The result obtained from the tests will be compared among the three types of material. Through the observation of the experiment, it was found that the data obtained with different properties of paper produced from the different material.

Abstract: Comparing with the stability demands of construction material used in pipe-bag riding technology for sea embankments, and based on many site and laboratory tests of sand distributed in Dongtai offshore, Northern Jiangsu Province in China for reclamation engineering, the type of sand, mechanical composition, grain shape, coefficient of permeability and liquefaction potential of sands were discussed. Additionally, the sea embankment slope stability analysis and seepage stability analysis demonstrate the sands can be used in sea embankment construction for pipe bag method

Abstract: We have used Groundwater Modeling System (GMS) to numerical simulate the groundwater pollution migration caused by crude oil leak in the research regions. The result of the numerical simulation shows those 40 years after the crude oil leak, the contaminative area of pollutant reaches 46595 m3, and then the pollutant doesn’t arrive the pumping well. The density of the pollutants is less than 0.01mg/L. Therefore, we suggest that pipeline projects should make a specific effective plan for groundwater environmental monitoring for the sake of providing reference to institute relative countermeasure for prevention and control groundwater pollution.

Abstract: Lean six-sigma methodology focuses on continuous improvement approach with an emphasis on improving the product quality and reducing waste. Recent studies of lean six-sigma methodology indicated that this methodology commonly focus on four areas of performance namely quality, cost time and service. In this paper, an environmental performance is proposed into lean six-sigma methodology. An environmental performance needs to be integrated into lean six-sigma as a new paradigm of lean six-sigma methodology to achieve overall competitiveness of product.

Abstract: Poor information means that characteristic information presented in the subject investigated is incomplete and insufficient, with a small sample and the lack in prior knowledge of probability distributions and trends. For a long time, experiments on the rolling bearing performance concern primarily with statistical evaluation of the fatigue life. With the development of aeronautic and astronautic undertakings, new requirements for the variability of the bearing performance, such as friction, wear, vibration, and temperature rise, are driven. Because the number of characteristic data is small and prior information on probability distributions and trends is poor, statistics has difficulty in assessing the bearing performance. How can the problem be solved There is a phenomenon in Nature, i.e., genetic variations of a species are likely to result in some strange change. Inspired by this, the paper advanced a hypothesis, viz., maybe some genetic variation drive the nonlinearly dynamical evolvement of the information poor process of the bearing performance. To demonstrate this hypothesis, the paper found the variant gene, presented the concept of the poor information equivalence relation, and proposed the method for construction of the information poor space to reveal the new properties of the nonlinearly dynamical evolvement of the modern bearing performance.

Abstract: As the name implies, the quality of service（QoS） often reflects the service consumer satisfaction with the services provided by the service provider. In computer systems, particularly in the computer network system, as the providers of the computing and information services, It is necessary to consider the cloud user’s suitability in the process of different physical implementation in the same functional service when constructing the server cluster in the cloud. This paper is for the cloud, build a service quality model oriented user request and the implementation process, completed the choice for the physical implementation with the best users fit service.

Abstract: Ceramic matrix composites have been recommended for space applications. Accordingly, in this paper, a material selection method for the forebody of a space transportation system is demonstrated. The methodology is based on mass-model coupled aerothermodynamic design of a highly-integrated forebody-inlet system that uses the multidisciplinary optimization capability of the TIPSO (Two-steps Improved PSO) algorithm. The design optimization and hence material parameters are evolved using the newly developed SHWAMIDOF-FI tool. This paper focuses on validating the selection of carbon composite material by optimizing the configuration parameters for integrating a cone-derived forebody into planar wedge surfaces and an inlet-isolator assembly, so as to form a mixed internal-external compression system. Surface temperature, thermal conductivity, tensile strength and emissivity are used as primary parameters for selection of a forebody material. The optimization results validate that a carbon fibre reinforced carbon and silicon carbide (C/C-SiC) dual matrix composite is best suited for the application

Abstract: This paper addresses an n-job, m-machine permutation flow shop scheduling problem to minimize makespan criterion. We present a modification of the best-known immune algorithm of Engin and Döyen (2004) [A new approach to solve hybrid flowshop scheduling problems by artificial immune system. Future Generations Computer Systems 2004;20:1083-1095] for this problem. To evaluate the solution quality and efficiency of the proposed method, the experiments are carried out in two phases on a set of benchmark problems and analyzed. We show, through computational experimentation, that this modification considerably improves its performance without affecting its time complexity. The proposed method also has been compared with the currently best simulated annealing from the literature.