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To forecast land use change is important for land use management, With the development And improvement of the society, to use the land resource reasonably and effectively has become more and more important Data collection and integrate analysis are important to forecast land use change. so, model of land use change be built by using mathematics, which can be joined GIS. By this way, it cans quantificational...
Single grey system forecasting model has its limitation, and the bearing characteristic of the pile in soft soil is extremely complicated. Its load-settlement curve usually can not fit the exponential curve, and the single forecasting model cannot fit it completely. In order to improve the prediction's accuracy on vertical ultimate bearing capability forecast, some grey system forecasting models have...
We use satellite altimetry as information source to establish a model of the mean sea level for its global coverage. In coastal, island and shallow water areas the accuracy cannot meet the requirement because of interference of reflected signal. Based on tidal and GPS data, we correct the mean sea level model built in Bohai coastal areas. The results show that the accuracy of the model can be significantly...
This paper presents a novel for Landsat TM Image processing. It can be used to quantitative simulating each band reflectance of TM image. On the basis of non- destruction of the original band spectral features, it improved single band information and visual sensitivity. The reconstructed Image quality were analyzed using image quality assessment indexes, and the results showed that the image enhancement...
Soil moisture is one of the most important factors for hydrology research and agriculture management. But it is measured only at limited locations and temporal periods due to the limitations of technology and economy. Distributed hydrological model can simulate the variation and spatial distribution of soil moisture conveniently. This paper compared the simulation results of two different distributed...
An experiment was carried out over a flat agriculture area located at Gongzhuling, in the Jilin province of China. Four adjacent corn fields were selected as the test targets and the plant and soil parameters were collected over a growing season for the models inputs. Six multitemporal and multiangle ASAR AP images (C band, HH and HV) were acquired during the experiment. This paper presents a semi-experience...
This paper according to problems existed in improper data processing and closed error contained in the model when building models with logarithmic, power function and hyperbolic function; In precision estimation of growing stock volume, there is no scientific model for precision estimation; to address these problems, the paper would research volume model parameters based on nonlinear least square...
This paper studied the efficiency of the oilfield water injection system by using the water injection system theory, fluid mechanics theory, and graph theory and optimization design technology. According to the actual conditions, the paper established the mathematical model of Wuliwan oilfield pipe network. Based on the actual data of production, energy distribution of oilfield water injection system...
Aimed at landslide, a specific geology, this paper presents a method of establishing three-dimensional geology modeling using generalized tri-prism (GTP). In the meantime the principle, data structure and expressing of topology relation of GTP model is introduced. Design a space database structure of landslide built on drilling data, and then achieve simple three-dimensional visualization of it.)
This paper introduces the acquiring and feature of spatial data in marine fishery 3S integrated model. It analyses and compares the functions and features of several common GIS spatial data management models. It also discusses the models of the object relational database management system in marine fishery 3S integrated model.
Large diameter bored piles are being used widely. The model of side-friction resistance of them is very important to pile load capacity. Therefore, the hyperbolic model has been presented basing on self-balanced test data of 6 piles of certain project. By using this model, the test pile data was analyzed with two different numerical calculation methods. Furthermore, the results was discussed and compared...
In order to calculate building settlement forecast accurately and construction operation safely, a building settlement forecast method using BP neural network was put forward with deeply analysis of existing building settlement prediction methods. Firstly, BP neural network learning samples are established based on time series analysis method, a three-layer BP neural network is used to settlement...
Research on 3D GIS simulation system of pit mining surface subsidence is not merely simple extension of 2D geographic information system, but from spatial model analysis to spatial database structure until visualization of 3D data. The research and application of this system have important and positive significance on evaluation of mining surface subsidence damage, control of mine geological disaster,...
The photogrammetry database mostly stores and manages the data of digital map, such as the data of digital elevation model, digital line graphic, digital orthophoto map and digital raster graphic in this area. In this paper, The design and implementation method for Photogrammetry System based on commercial database management system (such as ORACLE, SQL Server) is discussed. In addition The use of...
Activated Carbon is a water treatment adsorbent with a large adsorption capacity, its adsorption capacity will be able to greatly enhance after modified activated. Through the use of before and after the modification of mesoporous activated carbon powder to the heavy metals copper ion adsorption, the effects of different pH, adsorption temperature, balance time, the amount of activated carbon adsorption...
This paper presents results from an investigation of global wave energy resources derived from analysis of ECMWF ERA-40 wave re-analysis data spanning the 45 year period from September 1957 to August 2002. The global distribution of wind sea energy and swell energy, based on the wave spectra partition, are presented for the first time. The spatial and temporal variations of the global wave energy,...
The spatial rainfall is one of the key inputs for the distributed hydrological model, and their precisions heavily affect the accuracy of streamflow predictions from a hydrological model. Satellite-based rainfall products are expected to offer an alternative to ground based rainfall estimates in the present and the foreseeable future. So, the present study mainly deals with the comparison between...
At present, the results of mine geological environment investigation are often expressed by 2D Maps, but 3D-Visualization technology will make these results more directly perceived through the senses. In the existing theories and technology conditions and aiming at the characteristics of mine geological environment, this paper solve the problem of unified visual of Terrain model, Surface features...
Remote sensing is the effective guarantee for quickly and accurately acquiring soil data needed by the precise agriculture. Soil nutrient's measure and calculation method has already developed to spectrometry compared to the traditional geochemical method. This article systematically described the research progress and analyzed the key technologies in using remote sensing techniques for soil organic...
Since the province of Yunnan carried out weight calculating program, We have achieved preliminary accomplishments on administering overload and over limit transportation, decreasing traffic accident happening, highway property protecting. But, as the result of our province implement this program still very short, there are many problems in practical experience and these problems needs to be resolved...
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