Applied Mechanics and Materials Vols. 641-642

Abstract: This paper proposes a generalized model based on the granular computing to recognize and analyze the traffic congestion of urban road network. Using the method of quotient space to reduce the attributes associating with traffic congestion, the identification of traffic congestion evaluation system is established including 3 first class indexes and second class indexes of 11. The weight of evaluation indexes are sorted by value in descending order, which are calculated based on rough set theory. In order to improve the efficiency of traffic congestion identification, the appropriate granular is determined by the model parameter μ. When μ is larger, the identification is more effective and the run time of model is longer conversely. Experiments show when the value of μ is between 0.8 and 0.98, the effect of traffic congestion identification is comprehensive optimal.

Abstract: Considering the diversity and random of the factors in traditional safety distance model, the deceleration and some time parameters in the braking action of the modified model were quantified first. When the following car moved slowly than the car ahead, it usually tailgated with speed modes. This case was considered in the modified safety-distance model. The model is proven to be higher accuracy by calculating and emulation analysis. Research shows that smaller speed difference, less the safety-distance it needs to keep, but it becomes insignificant when the following car is slower than the car ahead. There is greater uncertainty in rear-ending accidents for overlooking the fact that the car following with speeding in the traditional model.

Abstract: Nowadays we advocate low carbon economy, energy conservation and emission reduction, emphasize the harmonious development of human being and the nature. As a result, the clean, efficient microgrid with flexible use mode is widely payed attention to. A microgrid uses natural resources as electric power source, it can effectively relieve burden of the grid, and help to solve the problem of transporting electricity from the grid to remote suburb area. How to design the structure of a microgrid to make it run harmoniously with the grid while using clean energy efficiently and controlling the microgrid reasonably is the key to developing microgrid technique. Based on the construction of microgrids in China, this paper concludes the main key techniques in designing and constructing of microgrid, introduces several typical microgrids in China, and makes an outlook to the designing of microgrid structure and technique development.

Abstract: A sports training center training venues and office building adopting water loop heat pump system (WLHPS) are taken as examples, combined with the practical problems in design and operation, to analysis the operation characteristics of the air conditioning system and its advantages and disadvantages, and the energy saving operation strategy is put forward to further reduce energy consumption.

Abstract: Aiming to improve the rural vernacular indoor thermal conditions in winter and achieve the energy-saving objective 65%, the traditional local-style dwelling houses are investigated and the energy consumption of exterior-protected constructions is analyzed in Ningxia. The vulnerable spot of building energy consumption is found, while we discuss the shortage of traditional local-style dwelling houses in construction and design. Based on the social economic conditions of Ningxia, we put forward the improvement design of rural dwelling construction. Meanwhile, we analyze and calculate the thermal engineering performance of new construction design, which demonstrated that the scheme is reasonable and effective.

Abstract: This paper aims at researching the quality and quantity complex measurement of the eco-residential district construction system and provided a method for scientific decision-making. The frequency analysis method is applied to identify key complex elements. A structural equation model of eco-residential district construction system complexity measurement is established which can effectively describe the relationships among indices that influence complexity of eco-residential district construction system. The results indicate that external environment, system objective and system information possesses higher complexity character and the model is effective to assess the complexity of eco-residential district construction system.

Abstract: Ecological architecture has become the inevitable trend of building development, evaluation of ecological architecture system also has gradually become the hot issue in the world. This document introduce the development of ecological architecture and the research status of evaluation system, how to use the fuzzy comprehensive evaluation to study the comprehensive benefit of ecological architecture: calculate the result of comprehensive benefit through setting up the index system. This will put forward a train of thought for the benefit evaluation of ecological architecture.

Abstract: Energy is an irreplaceable factor for the socio-economic development of a national or regional. Firstly, the definition, advantages and disadvantages as well as application scope of several energy forecasting methods are presented. Secondly, according to the characteristics of biomass and the worldwide studies, the GM (1, 1) prediction mode, the exponential smoothing model and their weight combination model are selected to predict the main crop yields of Beijing. The comparative analysis shows that the weight combination model has higher accuracy and reliability. Thirdly, using crop yields data of Beijing from 2001 to 2012 establish weight combination forecasting model. 2013 to 2022 in Beijing’s crop yields are predicted by the weight combination model and the available quantity is predicted by the rate of grass valley and availability coefficient. Finally, the converted into standard energy coefficient is introduced to assess agricultural biomass potential. All provides a theoretical basis for the government to make appropriate energy policy.

Abstract: Based on the present situation of village building adopting the internationally recognized life-cycle theory, the life-cycle calculation model of carbon emission of rural roofing materials was put forward , the calculation boundary of carbon emissions was divided and the calculation parameters and calculation formula was determined. The result shows that: under reasonable assumptions, applying life cycle theory to carbon calculation of rural roofing materials is feasible. The rural roofing materials industry by improving production process to reduce energy consumption and selecting raw material in localization as far as possible can significantly reduce carbon emissions.

Abstract: The traditional local-style dwelling houses are investigated and the energy consumption of exterior-protected constructions is analyzed in Ningxia, aiming to improve the rural vernacular indoor thermal conditions in winter and achieve the energy-saving objective 65%. Meanwhile, the vulnerable spot of building energy consumption is found. Starting from the architectural function and space organization, solar-energy resources using and exterior-protected construction and so on, the integrated scheme improvement is put forward under the local natural climate and economic conditions. In addition, we deal with the tests of new scheme thermal engineering performance and indoor thermal environmental quality through the analysis of energy consumption. Finally, it is demonstrated that by reasonable design, the rural vernacular building in Ningxia can improve indoor thermal comfort and energy saving goal.