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Information on rice growing area and rice production is critical for most rice planting countries while making state and economic policies. However, the area where rice crop is cultivated is often cloudy and rainy that entails the use of radar remote sensing data for rice monitoring. This paper summarized the main achievements on rice monitoring using ENVISAT ASAR data during the three years (2004–2006)...
This paper establishes a natural-factor database on the basis of researching the literature and considering the availability of data, using remote-sensing data and meteorological observation data, and employs the Fuzzy Clustering and expert knowledge to establish an assessment model of wind erosion hazard to assess the wind erosion hazard of Erenhot-Zhangjiakou. The result shows: the trend of the...
Working principle of gas brake valve and performance testing methods of tightness, static and dynamic characteristics are introduced. Several characteristic parameters, such as initial pressure differential and dynamic response time, are blended into testing methods. An automatic measurement system of the gas brake valve based on virtual instrument is developed, and realizes double-position independent...
An enhancement algorithm for weather fax map with zero-mean Gaussian noise is proposed based on BEMD and self features of meteorological facsimile maps. First decompose the noised meteorological facsimile map to IMF1 and a residue, then estimate the variance of the noise via BEMD and IMF1 through the intrinsic relation between the variances of IMF1 and the noise. According to the current time and...
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...
A new method using cosine transform to calculate response spectra from strong motion earthquake records is developed. Compared to Exact, Wilson-θ and Newmark method, the proposed method has a higher accuracy in displacement and velocity response spectra under greater damping ratios and a lower accuracy in acceleration response spectra. The values of EI Centro response spectra calculated by cosine...
To further promote the study of the carbon sinks and the quantitative analysis of fixing carbon and releasing oxygen of Phyllostachys pubescens which was the principal bamboo species in subtropical area, diurnal variations net photosynthetic rate were measured using photosynthesis methods in this study. The results showed that: there were obvious differences in carbon fixation and oxygen release among...
It is difficult to describe the locations change of urban heat islands in multiple centers cities because of high fragmentation. We analyzed the changing trajectory of urban heat islands in a multiple centers city, Shenzhen in China in 1986, 1995, and 2005. By using generalized single-channel method, surface temperature were derived from Landsat TM data. Urban heat islands were defined by Local indicator...
The surrounding area of the Bohai Bay has one of the highest economic development rates of China. Rapid industrialization and urbanization has resulted in extensive changes in land use, including the construction of harbors and embankments. For the analysis of the changes of the coastlines, multi-temporal Landsat images have been used, in combination with topographical and nautical data. From the...
Three cities with different degrees of urbanization in developing countries of Asia-Pacific region are selected as the study areas, They are Zhangjiagang city in China, Dehradun in India and Hanoi in Vietnam. In this paper, data was collected concluding nearly a decade of remote sensing data, population, economic data and other relevant information. We studied land-use and land-cover change (LUCC)...
A method for analyzing economy of offshore wind turbine installation vessel is introduced in this paper. Cost calculation method of wind turbine installation vessel (TIV) is discussed by confirming total working time and cost per unit time of TIV. By selecting navigation distance to offshore wind farm and possibility of significant wave height in wind farm as the main variant affecting the economy...
In order to study ship type of small and medium size tailing suction hopper dredger (TSHD), a comparative analysis targeted to Pallieter and Hangjun4009 is carried out. By comparing main dimensions, hull lines and principal characteristics, the usability of TSHD with a bigger block coefficient and a bigger width/draught ratio is studied. Based on calculation of wave-making resistance coefficients,...
Based on the geological and economic conditions, it is not realistic to get large number of geological data. Spatial data interpolation is the key for solving this problem, choosing a reasonable interpolation affect the accuracy of 3D geological model. We first describe the method for traditional interpolation to construct geological surface, and introduce the application of discrete smooth interpolation...
Soil chronofunction is an important way to understand soil forming processes quantificationally, and the foundation for establishment of soil genesis model. To establish soil chronofunction, soil properties and 14C ages in the Holocene of heilu soil profile in Luochuan were researched. Linear, logarithmic, and third order polynomial functions were selected to fit the relationships between soil properties...
With the development of economic globalization, corporate social responsibility has become a research focus. Firstly, based on Carroll's social responsibility theory, the scope of corporate social responsibility, including economic responsibility, legal responsibility, ethical responsibility and philanthropic responsibility (or self-responsibility), was defined. It is shown that corporate social responsibility...
Air pollution is one of the major factors affecting human health. Examining the relationship between air pollution and respiratory disease is a major focus in environmental science. In this paper, we conduct a correlation analysis between air pollutant concentrations in 2004 (specifically PM10, NO2 and SO2) and 2004 data on respiratory disease inpatients (including bronchitis, asthma and pneumonia)...
The paper achieved identifying the Agricultural Non-point Source Pollution Critical Source Area in Xingkai Lake watershed using pollution index method with the help of RS and GIS. The conclusions were that: (1) the high pollution risk area mainly clustered in the border of ZhiYi, Baipaozi, Xingkaihu and Liumao Towns and the west southern area of Yangmu Town, and the serious soil erosion and high livestock...
In this study, the optimum conditions, the decolorization rate and the possible degradation mechanism were explored for the degradation of Acid Red B by the combined technology of ozonation and high voltage pulsed discharge (HVPD). The results suggested that the decolorization rate of the Acid Red B fitted the pseudo-first-order kinetics with initial dye concentration. The optimum ozone dose and pH...
In this paper, design process and structure of the high-speed train bogie parameters determination test bench is introduced. The virtual prototype for the test bench is established by SolidWorks, and through the finite element analysis of key components of the test bench, such as the gantry framework and the single 6 degree of freedom loading system assembly, it shows that performance indexes of key...
A new method of parameters design for aerial survey based on the laser footprint distribution of airborne LiDAR was proposed. In order to implement the method of parameters design, the relationship maps between the distribution of laser footprints and different parameters, respective the parameters of laser beam, flight and laser scanning system were created. Using the actual parameters and the independent...
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