Advanced Materials Research Vols. 171-172

Abstract: In this paper a gas cooler for trans-critical carbon dioxide water heater was designed and calculated according to the theory basis for the optimal design. The characteristic parameters of gas cooler in heat pump hot water system were compared and analyzed, applying the data from trans-critical carbon dioxide water heater test bed, under one-time heating condition, by different flow of chilled water and hot water, different inlet temperatures of chilled water and hot water. To sum up, coefficient of performance can be increased by increasing the chilled water inlet temperature or hot water circulating flow, while it can be decreased by increasing the inlet temperature of hot water circulating system，the parameters (flow of water, inlet temperature, the refrigerant mass flow, gas cooler pressure and inlet temperature of refrigerant) need to be adjusted to different requirements, for ensuring the high efficiency of system.

Abstract: In this paper, a research has been carried out on the normal operational state of IPWR by using the thermal hydraulic system code Relap5/Mod3.4.In this study the conceptual study analysis of the reactor named as Inherent Safe Uranium Zirconium Hydride Nuclear Power Reactor INSURE-100 is considered but is only based on the conceptual study so the current research focuses on the normal operational of the reactor by using the Relap5/Mod3.4 code. For this purpose, two passive safety methods have been included for the safe operation as well as for transient analysis of the reactor. In the first one, Passive Residual Heat Removal System (PRHRS) has been modeled by taking the heat exchanger out of the Reactor Pressure Vessel (RPV) in the water tank so that it can absorb core decay heat in case of transient conditions and in the second one heat exchanger is placed both in inside and outside the RPV so that there can be another way to absorb the core residual heat. Considering these concepts figured out the normal operational state of the reactor by using Relap5/Mod3.4 in comparison with the conceptual design study of the reactor under consideration and the results extracted can be a good agreement for the transient analysis of the reactor.

Abstract: In this paper research has been carried out on Loss of Feed Water Accident (LOFW) scenario of the Integral Pressurized Water Reactor ( IPWR) under two circumstances by the use of thermal hydraulic system code i.e Relap5/Mod3.4. In the first one, Passive Residual Heat Removal System (PRHRS) which is designed to absorb core residual heat in case of transient conditions is included which has the function of operating under the accident vulnerabilities. Concerning with the second case i.e without the use of PRHRS rather a tank of water which has the capacity of about 8% of the total feed water supply and is operated under accident scenario is considered. Taken into account these conditions,first the nodalization diagram of the two cases have been figured out then according to the LOFW accident time event scenario use the Relap5 code to simulate the accident. Finally the graphical explanation (separately) of the two cases with graphical approach as well as the conclusion is given at the end.

Abstract: The similar normal distribution is used wildly in the natural science and social science, fuzzy membership degree function which is accurately established seriously reduces the forecast accuracy of such data. Cloud model compare randomness and fuzziness organically, it reveal the relevance between randomness and fuzziness with digital expectations, entropy and hyper entropy, forecast algorithm based on normal cloud model relaxed the requirements of a normal distribution prerequisite and replaced the accurate membership degree function with the membership degree distribution expectation function, it is more easier and simpler than the joint distribution, Comparative experiment showed it is more general, can complete the data forecast accurately and directly.

Abstract: In order to meet the user needs and enhance the brand identification, a new method of brand products design based on Kansei engineering is presented. Firstly, users’ implicit semantic information is extracted using semantic differential method, and the brand gene pool is established. Secondly, according to analytic hierarchy process (AHP), genes which meet the goal of semantic information are selected from the gene pool, which can be used to constitute a new product. Then the whole frame of product is constructed, and the final design project can be quickly obtained after some adjustments. Finally, a new brand from a furniture design company is taken as an example to illustrate the specific of this new approach. By employing this method, a series of new sofa are designed.

Abstract: Aiming at the complexity mechanism of foundation pit excavation, the paper proposed a feedback analysis flow combining 3D numerical simulation, orthogonal design, artificial neural networks(ANN) and genetic algorithm(GA). The sample data are produced by numerical simulation based on seepage theory and Biot consolidation theory, reflecting the interaction of hydraulics and mechanics. The BP neural network model is trained by above sample data and is optimized by GA, which can map the relation between soil layer parameters and character monitoring displacements well. Based on the relation, the soil parameters could be identified by GA. The method has been applied to analyze the Suzhou Runjie square foundation pit excavation and the permeability coefficients of soil layers were identified. The fluid-solid coupling process of foundation pit excavation based on inversion parameters are simulated. It indicates that the method can get satisfied precision, which provides guide meaning to specific engineering construction and appraisal.

Abstract: Building information modeling (BIM) is a new method of dealing with the design and information of building component, this project created Building integrated photovoltaics (BIPV) in BIM with parametric design, it is a new way to study and analysis BIPV. In BIM models, all information about the building components and its lifecycle are included. Therefore the study utilized this important characteristic of BIM to explore its application in BIPV design. The author used BIM software Revit to develop a BIPV building model as the parametric prototype and programmed with panels’ information in C# 2008 to correlate the angle of photovoltaic (PV) panels with sun altitude, and finally applied application programming interface (API) in Revit to control these panels’ angle by the sun path.

Abstract: G protein-coupled receptors (GPCRs) are the largest protein super family in the human body and play a significant role in the pharmaceutical industry as drug targets. Although the deep research in GPCRs is continuing to grow, the study on their structures and functions is limited, for it is difficult and complex for the researchers to obtain purified membrane protein structures of GPCRs. Currently, how to get the structures of GPCRs and how to analyze them are the most important issues in modern molecular biology and medicine. We adopted multi-classifier method to deal with the problem of functional classification of GPCRs. Based on class hierarchy, the different data sets for training the classifiers were formed, and the diversity and accuracy were considered together in selecting the classifier sets. The dynamic weighted fusion rule was used to combine the classifiers. Experimental results show the effectiveness of this multi-classifier system.

Abstract: Ultrasonic vibration assisted electrical discharge surface modification was studied in the paper. The influence of ultrasonic vibration amplitude and frequency on the modification layer performance, such as surface roughness, sectional morphology, micro hardness and wear resistance was investigated. Experimental results show that ultrasonic vibration assisted electrical discharge surface modification can improve surface roughness and make the melting material well-distributed. The surfaces have higher micro hardness and wear resistance when the tool electrode is assisted with ultrasonic vibration.

Abstract: Technological progress is an important and complex factor which affects extraction sequence of energy resources. Based on the resources intertemporal extraction model, by means of comparative static analysis methods, we analyze the impact of technological progress on extraction sequence of energy resources. The results show that technological advance influences extraction sequence of energy resources in multiple ways, such as the stock of energy resources, energy consumption pattern, and marginal cost of mining. Different technological advance has different influence of intensity and direction. Technological progress adverse to restrain consumption may accelerate the resources depletion, but energy substitution is the effective way to achieve the sustainable utilization of energy resources.