Advanced Materials Research Vols. 765-767

Abstract: Based on the mechanism for ECER through Electronic Toll Collection (ETC) in information-based freeway project under low-carbon economy (IFP-LCE), and on the rule for selection of evaluation indices, an index system was built for the economic evaluation. Then cost benefit analysis was used to economically evaluate ECER in information-based highway traffic projects. Finally an ETC project in a toll-gate in Xi'an was investigated to validate the feasibility of the proposed evaluation indices and method.

Abstract: Drying characteristics of Thomson seedless grape at different drying temperatures (45°C, 40 °C, 35 °C and 30 °C) were investigated in a Constant Temperature and Humidity Testing Machine. 8 different thin layer mathematical drying models are selected to fitting the date. The logarithmic drying model is satisfactorily to describe the drying process of grapes. In addition, this paper also calculated the moisture effective diffusivity (D_eff) of Thompson seedless grape during drying process, and 45 °C has the maximum value 3.0702·10^-11 m²/s. The energy of activation (Ea) is 59.03 kJ/mol. This means it will take 3279.44 kJ to remove 1kg water from the grape samples.

Abstract: The characteristics of green building materials is summarized and analyzed, the development ways of green building materials is analyzed and summarized on the demand of green building materials in China at the present.

Abstract: Based on the application in the system optimization of environmental problem, the solution procedures of dynamic programming are introduced. Combining with some typical problems, such as the shortest path problem, the optimum scheme problem of water treatment and the water resources allocation problem, reliability analyses of the solution procedures by LINGO software is processed. The results show that the LINGO software can effectively solve this kind of dynamic programming problem and is the effective tool to solve the environmental problems and resource problems.

Abstract: Along with the development of facility agriculture technology, the greenhouse industry constantly upgraded. Applying sensor technology, electronic technology, communication technology and network technology to regulate and control the greenhouse environmental factors will greatly boost greenhouse industry economic benefit. This paper do some research and analysis of monitoring and controlling on greenhouse environment in facility agriculture.

Abstract: To evaluate the levels of industrial wastewater is very important; it can help us to deal with it. In some case, some factors are the key pollution cause; we need to focus our attentions on them. But the classical fuzzy evaluation method had some limitations to resolve this kind of pollution levels evaluation problems. we analyzed the classical fuzzy evaluation method to find the shortcomings of the it firstly, and then improved the fuzzy evaluation method by changing the weighting of the factors in order to highlight the key factors. The result of cases studied shows that the method presented in this paper is more reasonable to the problem.

Abstract: To address the air pollution diffusing problem, a visualization algorithm based on fluid diffusion physical model and volume rendering is proposed to simulate the diffusion process epically for the urgent pollution accidents. The diffusion model is based on the simplified heat diffusion equation and the basic vortex constraint. The texture mapping based volume rendering method is adapted to handle the visualization algorithm. In addition, the render process adopts the GPU to implement the real-time visualization rendering.

Abstract: The hydrological model is a tool to simulate the hydrological processes and to solve the practical problem. The composition and spatial configuration of landscape often result in variation of hydrological conditions. This study is applied to compare the results of SWAT model with different land use maps in Qihe watershed, and shows that the sensitivity of SWAT model to landscape spatial configurations at landscape level is weak, except the landscape composition. After model calibration, both models satisfy the observed data well, which means though the land use map beyond the real landscape spatial configurations, the SWAT model could also describe the water yield of Qihe watershed accurately during the validation period.

Abstract: Heavy metals pollution in agricultural soils has been an important problem to human health, mapping large-scale spatial distribution of soil heavy metals is urgently needed. Instead of traditional methods, time-consuming and destructive, soil properties predicted by remote sensing technology shows a lot of advantages, which makes large area of real-time dynamic monitoring as possible. However, before achieving prediction using spectra data, the first thing to do is that finding the spectral characteristics of soil heavy metals. In this paper, taking Cr and Cu for example, the correlations between soil heavy metals content and laboratory-measured reflectance is studied using partial least squares regression (PLSR), which is an adaptive method to examine linear between spectrum and concentration. First of all, using the raw spectra, remove outliers of heavy metals concentration by PLSR modeling. Next, though comparing RMSEC and RMSEV against PLSR components, and cumulative explanatory of spectral components to metal content using different pre-precessing methods, find the right pre-pcocessing is CR and optimum number of components to Cr and Cu are 3 and 2 respectively. Simultaneously, with the meaning of PLSR models regression coefficients, we analysis the spectral characteristics of Cr and Cu, although can not to realize the prediction only take use of these spectra, which is still essential to achieve simulating spatial distribution of soil heavy metal by remote sensing.

Abstract: This paper discussed the regionalization of valley economy of the mountainous area of Beijing. 19 indexes of natural ecological and socio-economic systems were covered,and valley were considered as complete individual taxons. The mountainous area of Beijing was divided into 4 valley economic regions : Shallow mountain, plain grain and vegetable production area (I), Plain premier, special and high quality varieties planting area (II), Remote mountains forest conservation zone (III), Suburban Hilly Area and Remote Mountains ,water source protection and forestry product planting area (IV) valley economic regions by Principal Component Analysis (PCA) and Cluster Analysis (CA) combining with Geographical Information System (GIS) platform. These 4 regions were further divided into 12 valley economic types. The conclusion analyzed the regionalization and methodological framework for large scale areas like the mountainous area of Beijing. Such practice could be generalized to develop appropriate regional valley economic theory for large scale areas.