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As a kind of relative new asphalts mixture combining the advantages of several commonly used asphalts mixtures, SMA has good performance in all-around. Researches on SMA has been carried out in term of experiments, mix proportion design SMA, performance evaluation, construction technology and running-after observation of the road performance in the supporting engineering project is made, which are...
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...
Landscape pattern in downtown area of Chongqing City is studied by using four sets of land use data in 1978, 1988, 1993 and 2006, quantitative methods of landscape ecology and techniques of RS & GIS. Firstly, landscape is classified into six types of City, woodland, Non-irrigated field, Lake-reservoir, Irrigable land, and Bush by using remote sensing image. Secondly, depended on spatial analysis...
This paper is focused on the pedestrian flow characteristics for passage in subway stations and railway station in Beijing. By collecting and analyzing the data, the paper finds the different of the pedestrian speed characteristics between two kinds of transit hubs. The collected data were also used to develop speed/flow relationships and to calibrate the travel time function. By making an investigation,...
Based on land use and urban plan maps, we extraced urban land information of Chongqing urban area in periods of 1995,2000.2008. With the help of GIS softwares and statistical analysis model, such indexes as expansion speed, expansion intensity, expansion direction, expansion morphological, and landscape features were used. This paper analyzed the spatio-temporal characteristics of urban land expansion...
Researchers at home and abroad are mainly focused on the bearing capacity, effects of soil plug and pile driving of PHC pipe piles. However, little attention is paid to property variation of soil before and after their installation especially when different installation technology is adopted. For further study of engineering property of PHC pipe pile composite foundation, the property variation of...
Based on the systemic analysis on the related indexes of the evaluation of retaining and protecting structure for foundation pit, a relatively integrated evaluation index system of foundation pit support system was established. By making use of the method of improved Analytic Hierarchy Process which could satisfy consistent verification naturally, the synthesized weight of every evaluating factors...
Based on the water quality investigation data from August in 2009 to July in 2010, the water environment quality of Zhanjiang Mangrove Nature Reserve was assessed using single water quality parameter model, integrated water quality index model, organic pollution index model and eutrophication assessment model. The results showed that the key pollutants were dissolved inorganic nitrogen (DIN), dissolved...
A new evaluation index of flocculation effect - the vortex velocity gradient G' was introduced in this paper, on the basis of currently existing evaluation indexes of flocculation effect —turbulent kinetic energy k and effective energy consumption ε; then combined three indexes the CFD numerical simulation of lattice flocculent pond was conducted. The results indicate that the numerical calculation...
Having been one of an important application on remote sensing monitoring of rice, information extraction and estimation of large rice planting area timely is likely to be more difficult, only depending on the former on-the-spot investigation. According to the rice spectral reflectance characteristics in transplanting, the study analyzes the relationship of normalized difference vegetation index and...
Based on environment statistics data from 1992–2008, the changing tendency, types, causes and directly economic losses of national environmental pollution accidents were analyzed, and the high risk areas of water and air pollution accidents were studied by using Supermap. The results indicated that the number of annual environmental accidents was maximally 3001 times in 1994 and minimally 462 times...
Northwestern China has one of the most complex climates due to the complex terrain and complex climate change in China. The environment there is sensitive to the regional climate change, and is also very vulnerable to the global climate change. The present study examines the spatial and temporal variability and trends of precipitation during 1959–2008 in Northwestern China. The methods used include...
Phenolic acids was a group of allelochemicals with relatively high activity which was reported to have significant accumulation in soil of continuous cropping poplar plantations. The impact of phenolic acids on growth and development of poplars was essential in researches on degradation mechanism of forestland productivity. The effect of phenolic acids on detailed roots morphologic changes of poplars...
A three Cd2+ treatments field experiment was conducted with two different Cd2+ tolerance wheat cultivars to investigate effects of cadmium on soluble sugar content in flag leaves and grains, starch and its components in grain of wheat. The results indicated that there was no difference among the changing tendency of soluble sugar content in flag leaves and grains and starch and its components in grains...
Problems with air pollution in urban areas have been known for a long time. The air quality has an enormous impact for people's daily life. The Wuhan Environmental Protection Bureau currently uses ground sensors to monitor air quality in the city of Wuhan. While this method provides accurate information at specific locations, it does not provide a clear indication of conditions over the whole region...
The pollutants, which were brought by the living and producing of the village in Lake Baiyangdian, would have some effects on surrounding water quality. During May 2009 to March 2010, the research evaluated and analyzed the eutrophication state of five selected sampling points. Experimental result indicated that, the water around the village appeared eutrophication phenomenon overall, fish and poultry...
The vegetation succession and soil enzyme activities restoration with different growing years was analyzed by applying the spatio-temporal substitution method. The result showed that H. Rhamnoides and A. Desertoru are predominant species of the shrub layer. With the restore years prolonging, the species diversity index (H′, 1/D), saccharase, urease, phosphatase and catalase activities were increased,...
Based on TM remote sensing images in 1989, 2000 and 2008, combining with GIS technology, and the city of Beijing's land use change characteristics in the past 20 years from 2008 will be analyzed. The indicators such as single land use dynamics, land utilization classification index and land use transfer matrix will be used to reveal the changes on range, speed and direction of this study area. On...
In view of complexity of the business websites and fuzziness of quality evaluation, AHP-based multi-level fuzzy comprehensive evaluation become the advantage model for business website assessment. The core computing of Fuzzy Evaluation is the membership conversion, however, membership conversion way at present has a problem of redundancy, that is, the redundant data which has no value to objective...
Using the hyperspectral data to evaluate the trophic state of inland waters is a more convenient approach for monitoring water quality than traditional methods. In the present study, field experiments were conducted for collecting water quality parameters and reflectance spectra in April, 2009 (48 samples) and May, 2010 (30 samples) in Lake Taihu, respectively. It has been proved that TLI(Chl-a) could...
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