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Based on reference literature, this paper use DEA Malmquist technology to establish the total factor index model considered the variable returns to scale for evaluating carbon emissions performance and analyzed the results. And then, based on the STIRPAT equation, the paper used provincial panel data to test the main factors of carbon emissions performance in China. All the results showed that: In...
Simulation of soil salinity is the basis for effective control of salinization and utilization of regional salinization lands. This paper was to simulate dynamic of soil salinity with pedo-transfer functions (PTFs) and geographic information system (GIS) technology based on facile variables in Yellow River Delta. Simulating models were derived from field observation data of soil salinity, EC and water...
As service organizations have realized that service performance is fundamental to establish their competitive advantage, service climate has been a subject of much service research. This study aims to explore how service climate dimensions impact on service performance. The findings from a survey of 212 employees from Guanghzou hotel industry in China confirm that customer orientation and managerial...
Pests have been greatly damaging the rice yield in Guangdong Province, China in recent year. Traditional pests warning models, based on the mathematical statistics, only considering the relation between weather and monitoring data factors, are limited in large place. As a result, multi-factor spatial overlay model was construction to research the damage of Cnaphalocrocis medinalis in Guangdong Province...
In order to study the influences of meteorological factors on Shanghai city, Jiangsu province, Zhejiang province and Anhui province's grain yield, this article calculated and compiled the daily four hour point data of meteorological factors such as temperature, wind speed, relative humidity and atmospheric pressure in 2001 to 2005, created the meteorological anomaly values and abnormal indices, collected...
Allowing for catchment hydrological effect due to spatial variability of precipitation and underlying topography, the catchment is divided into a number of basic units of concentration flow within only one channel link by the method of natural divide. The basic unit of concentration flow is regarded as a V-shaped structure, and a distributed watershed concentration flow model is built on a series...
It is well known that no uniform prediction approaches were obtained regarding ground water level, though the neural network and some other so-called artificial intelligence methods consistently provide the smallest uncertainty and different medians warranting further research on their abilities. In the present paper, the lower reaches of Tarim River is taken as the study area, a grey correlation...
Plant litter is an important carbon pool in the terrestrial carbon balance. Therefore, it is important to acquire the spatial distribution of litter storage at a large scale, in order to predict the effects of environmental changes, such as climate warming and precipitation changes on plant communities. The present study analyzed the spatial distribution of litter storage in China, based on the field...
This paper introduces at first GQS (General Quadric Surface) equation, then considers that utilizing depth images referenced to various datum planes to model point cloud. After getting reference datum, this paper proposing the methods of creating depth images from point cloud and the specific steps with reference to different datums. Finally we choose some point cloud data of ancient building components...
For the purpose of hydrological process simulation in cold and arid regions, the authors brought out the Vertically-mixed runoff model with Grid-based Water Storage Capacity(GWSC-VMR) on the base of the spatial distributed model of water storage capacity. In GWSC-VMR, factors such as topography, vegetation, soil and meteorology were taken into account. GWSC-VMR included canopy interception module,...
A total of 12 models in linear quadratic, cubic, exponential and power forms using only sunshine hours, latitude, and altitude were developed and compared to estimate the daily global solar radiation on a horizontal surface for 6 weather stations at plateaus zone, China. The models were compared on the basis of statistical error tests using the root mean square error (RMSE), mean bias error (MBE),...
In this paper, based on 16-day 250 m MODIS product suits, using residual trend method, the effects of Restoring Grazing to Grassland Project in Maqu grassland was evaluated. Firstly, some regression models between NDVI in different stage and synchronous meteorological data were constructed. Then using above models we can predict NDVI value without the project and analyze the residual trend of actual...
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