Applied Mechanics and Materials Vols. 556-562

Abstract: In this paper we introduced AHP method in bidding management of construction engineering, and use the MATLAB software to establish the bidding computer analysis system. This paper expounds AHP of the construction bidding process, and design AHP of computer bidding management system according to it. In order to verify the applicability of the model in bidding management system, we use MATLAB software to design bidding data analysis and simulation experiment of the construction. Through the calculation we obtain MATLAB visual display window of bid data analysis. At 50 steps, the convergence residual is, which meets the design requirement of accuracy. It provides a theoretical reference for the bidding management of construction process.

Abstract: The change of reservoir water level fluctuation has an important influence on the landslide deformation. In this paper, taking Zigui County of the Three Gorges Reservoir Shuping landslide as an example, based on the deformation and water level of reservoir deformation related analysis of landslide, summarizes the general rule by reservoir water level variation effect on deformation of landslide, which can provide some reference for the monitoring and analysis of landslide similar.

Abstract: According to the analysis of the I/O flow of the sand casting process, the paper divides the process into five stages. The carbon emission is used to describe the environmental impacts of sand casting, which is defined as energy carbon emission, material carbon emission and direct carbon emission, and then the carbon emission evaluation model is molded. Taking the actual cast as an example, the main influencing factors of the carbon emission and emission sources during the iron work carbon emission can be identified by the evaluation model.

Abstract: By analyzing the current situation of higher vocational road and bridge engineering setting in our country, this paper summarizes the problems existing in current professional settings. According to our country's vocational education development demand and road and bridge engineering industry needs, this paper puts forward improvement suggestions and countermeasures to various problems from the aspects of professional macro planning, the establishment of linkage mechanism of local education authorities and higher vocational colleges, and setting up professional evaluation mechanism.

Abstract: Urban rail transit will have a direct impact on the land use types and structure. This paper mainly focused on Wuhan rail transit line 1, Using 2002、2010 Wuhan local remote sensing image, based on RS and GIS techniques, the transfer matrix of land use around the orbit is achieved by analyzing the land use data in two different periods before and after the urban rail system run, and then based on the markov model to quantitatively forecast the change of land use types between 2013 and 2018. The results showed that, Wuhan rail transit increased the strength of the development and the degree of land use along it, accelerated the mutual transformation between the land use types, changed the land use structure and land cover types along it, in which the construction lands and roads were mainly come from cultivated lands and green lands.

Abstract: This paper uses the Hassan Carboniferous fractured reservoirs as the goal, firstly it analyses the reservoir characteristics of the cracks. On this basis, it uses two-dimensional random fractured media modeling method to build three different fracture models with different fracture parameters (fracture density, dip and speed). Then it uses finite difference wave equation forward and pre-stack depth migration processing of these models, and analyses seismic attribute of the migrated data, finally it finds a variety of seismic attributes sensitive to cracks, lays the foundation for fracture prediction with the seismic multi-attributes.

Abstract: The vegetation cover changing trend in Pearl River Basin during 1998-2012 are analyzed based on sequential SPOT VEGETATION data with Maximum Value Composites (MVC) method and linear regression technique. Results show: (1) From 1998 to 2012, the seasonal maximum NDVI changes in Pearl River Basin are obvious, peak appears in September and minimum in February, average is 0.578, the mean maximum NDVI is on the rise during the recent 15 years; the average of maximum NDVI is 0.740, the vegetation cover condition is good, but there is an obvious spatial difference. (2) In recent 15 years, the mean maximum NDVI trend shows that vegetation overall improved, deteriorated partly. Improved area, deteriorated area and invariant area account for 69.80 percent, 2.10 percent and 28.10 percent of the total area respectively.

Abstract: In the paper, the design scheme of the new cold store is proposed firstly, with the consideration of the latest technology application and the convenience and maneuverability of practical teaching. Then the refrigeration system is designed based on the calculation of the heat load of the cold store. The suited components such as compressor, evaporator, condenser and expansion valve are selected and the electrical system is designed. After that the whole unit is installed and adjusted to make sure that the installation is propitious to improve the system performance and convenient for training. Finally the thermal performance of the new cold store system is tested and compared with the old system test. The result shows that the matching of the new refrigeration system is reasonable and the new cold store is up to the mustard. With the help of training on the cold store, the students will meet the essential requirements of STCW 78/95 convention on application and management of the marine cold store.

Abstract: Influenced by both coal prices and energy-saving emission reduction situation, the development of semi coke industry has encountered a bottleneck in our country. Therefore, the semi coke industry energy saving technology related research, improving industrial energy efficiency, that is semi coke industry to improve the utilization rate of resources, the sustainable development of the important way.

Abstract: The spatial variability of single ecological factors of the farmland and the synergies among the ecological factors were studied by using geostatistical analysis and factorial kriging analysis (FKA).The results show that all of the spherical models of the co-variogram can be grouped into four parts: the nugget part, the small-scale part, the medium-scale part, and the large-scale part. The mean value of the small-scale range (1.12-1.85 km) is approximately 1.50 km, that of the medium-scale range (3.40-4.10 km) is approximately 3.8 km, and that of the large-scale range (9.35-10.10 km) is approximately 9.8 km. The correlations between each factor on the four scales vary, and the correlation between each factor on the medium scale is the strongest. In this paper, the ecological factors of the farmland on the medium scale have relatively consistent variability and sources, indicating that all of the factors on that scale have a high coordination.