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Atmospheric particulate matter estimated by using satellite data is gaining more attention due to their wide spatial coverage advantages. Here, instead of empirical statistical approach, we describe a physical-based approach that reduces the uncertainty of surface PM10 estimation from satellite data. In our approach, particulate matter mass concentration retrievals require the inclusion of optical...
Accurate evaluation and prediction of the potential impact of climate change on crop production is essential to the sustainable development of a country's agriculture. Model variations plus uncertainties in the future climate change scenarios create a big challenge for such evaluation. In this work, we developed a statistical crop model using the historical yield data between 1981–2010 from the National...
The accuracy and the applicability of LK model in the field of urban wind simulation, which fixes the structural defects of the standard k model, are further verified. Also, the paper analyzes the impacts of the spatial structure of urban canopy on the regional wind circumstance, and proposes fitting formula of relative region wind speed, building coverage ratio and building space ratio, based on...
Er Lang Shan tunnel is the most absolute altitude highway tunnel in china, which was firstly used the semi-transverse ventilation system, is characteristic of extensive length, higher absolute altitude, multivariate climate and complex wind stream. Based on one-dimensional fluid mathematic models, the characteristics of distribution of wind field were simulated under diversity conditions such as fans,...
In order to analyze the volume of air, which meet air supply conditions, per centiare Solar Wall panel can heated, also verify the feasibility and energy-conservation effect of Solar Wall System in severe cold region of China, a 3D model was established. The realizable k-ε model of the CFD Simulation Software FLUENT was applied to simulate conditions of different air supply velocity in...
This paper selected multi-source and multi-scale data to realize the 3D visualization of remote sensing images through digital processing and high-precision DEM modeling.bDigital Elevation Model (DEM) shows terrain factor, and images of surface textures cover the real situation. With ERDAS software support , we modeled the virtual three-dimensional flight by integrating the image data and the DEM...
Combining extension engineering method with cluster analysis, the classic and limited matter elements were constructed according to air quality standards and main air affecting factors. The logical domain was extended from (0, 1)to (-∞ ,+∞), meanwhile, the quantitative analysis in the classic matter-set which only judged by Yes or No was extended to qualitative analysis, which could show the administrative...
The research teaching plays a important role to improve creative spirit, ability and individuality of students. It has great significance to study connotation and development of the research teaching. The research teaching based on cognitivism, humanism, constructivism and modern study theory is formed inchmeal in the education process by all world educators. It advocates that students are the subject...
The comprehensive quality of air traffic controller is directly related to the safety of air traffic control system. This article put air traffic controller into the air traffic management safety system which consists of manpower, aircrafts, environment and management. An index system was established by introducing the Delphi method and Analytic Hierarchy Process (AHP) method, In the index system,...
With the rapid development of domestic airport industry, the construction and operation scale of the major large-scale airports have ranked the top ones worldwide, but big gaps still exists compared to global air hubs. Study on route network from the perspective of the airport could provide theoretical support for the construction of air hubs; what's more, it is also the need for China to transit...
With the increasing destruction of the ecological environment, the strategic position and role of ecological green space is ever more conspicuous in the sustainable development. In this paper, a three-dimensional computational fluid dynamics (CFD) simulation was carried out to analyze the oxygen dispersion in horizontal and vertical space under urban wind speed field conditions in city central of...
On the basis of the datasets from the routine meteorological observations, radar, satellite and NCEP reanalysis and using numerical simulation and diagnostic analysis, this paper studies the mechanism of cold-air snowstorms and the cause of locally strong cold-air snowstorms in the north of Shandong Peninsula. The results indicate that the mechanism of cold-air snowstorms in the Shandong Peninsula...
Vegetation parameters are important to improve the performance of numerical weather prediction, global change monitoring, and ecosystem modeling. In the study, Discrete Anisotropic Radiative Transfer (DART) model is employed to simulate Bi-directional Reflectance Distribution Function (BRDF)of heterogeneous landscape scenes. The simulated BRDF is required to match the measured BRDF by the POLDER (POLarization...
This paper discussed and analyzed the sand dust weather from March 19 to 22, 2010. Based on PM10 mass concentration levels computed from the Air Pollution Index (API) , the system clustering method was used to classify 86 cities of China into 8 subregions. For understanding the influence of the sand dust weather to the city air quality, temporal variation and spatial distribution of PM10 concentration...
The land use and land cover changes have been issues for better understanding human-land relations and sustainable development of regional land sources. This paper was to analyze the land use and land cover changes in new land around Bohai bay with crisp ecosystem and fast development during last 20 years with RS and GIS taking Guangrao county as a case study. In this study, two Landsat TM images...
This study aims to investigate the application of multimedia technology into college English teaching in China. Combining computer technology development with language teaching theories, the paper explores the aspects and extent to which multimedia technology is used in college teaching, probes the limitation and barriers to the use of multimedia technology, and finally discusses the possible improvement...
As China successfully launched the small satellite constellation-HJ-1 satellite, the first satellite to monitor and forecast environment and disaster which can acquire CCD multi-spectral images and HSI hyper-spectral images at the same time, the overall science and technology level to reduce disaster is markedly improved. Due to the distortions of the atmospheric absorption and scattering on the Solar-Target-Sensor...
Foreign direct investment (FDI) can benefit innovation activity in the host country via spillover channels. However, it may also cause negative effects because of the absorptive capacity of the host country. To analyze the absorptive capacity of the host country, experts usually put their attentions on the level of R&D investment. This paper focused on the role of education on spillover effects...
During the epoch of knowledge-based economy, knowledge management is important to the state key lab. This paper discusses on the problems of knowledge management of state key lab in China. Based on this, this research develops knowledge management process and flow pattern according the sample of four state key labs. The result reveals the knowledge management process includes six steps, and is a cyclical...
To predict Changing of Sea Level near Lingang New City in Shanghai, a model for global sea-level rise was established firstly and calculated with Maple. It is showed: the global sea level rise rate in 2009 is 2.68mm/a. The height and rate of global sea-level rise will be about 9.11cm and 3.22mm/a in 2020. Based on the study and the actual land subsidence in Shanghai Lingang New City, the rate of relative...
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