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Water is a sort natural resource that can't be replaced. It is also one of the important supports for the sustainable development of society and economy. According to characteristics of urban water resources system, an optimal allocation modal of water resources is built considering coordinative development among multi-objective and regions such as the production, living and ecology. Taking gray theory...
Evaluation of urban human settlements is a key part of the science of human settlements. Based on the principle of environmental friendliness, evaluation index system of urban human settlement has been established so as to supply city for reference in harmonious development and better-living construction. The model of fuzzy matter element can be used in evaluating the good or bad of urban human settlements...
The wastewater from distillation process has high organic content, which has to be treated to bring down the levels of COD and BOD to prescribed standards of environmental authorities. In this study, the organic wastewater from distillery also known as spent wash is treated by closed anaerobic reactors to recover methane rich biogas and utilise the methane as fuel to generate steam and electricity...
The prediction of urban water demand using a small number of representative properties is fundamental in evaluating carrying capacity of water resources. Artificial neural networks (ANNs) have recently become popular tools in the prediction of urban water demand. In this paper, an iterative method which combining the strength of back-propagation (BP) in weight learning and genetic algorithmspsila...
The Anaerobic degradation of perchloroethylene under iron reducing condition was studied by batch experiments in the microcosm with the temperature of 20degC. It showed that PCE could be sequentially dechlorinated to TCE and then to DCEs. TCE appeared at the second day of degradation experiment and a few mug/L of DCEs appeared about 10 days later. But the decrease of the concentration of TCE was not...
How to use the information technology to improve solid waste management has become a social hot issue of environment protection and resources protection. This paper chose Guangdong as the study area, discussed the construction goal of waste management system, and designed the waste information system based on WebGIS. The study would boost the solid waste management reform, and improve its management...
Water environment problems received extensive attention in recent years, take Jinan karst spring region for example, groundwater evolution characteristics were analyzed by observing changes of spring level, spring runoff, water quality and safety yield, authors thought the main reason of drying-up was inadequate understanding of the safety yield index. According to the characteristics of Jinan spring...
PS-DInSAR technique fusing multi-metadata and its basic flow are expounded considering limitations of conventional D-InSAR in atmospheric delay and space-time decoherence. It is held that multi-metadata helps to weaken the influence of systematic error and improve the surveying precision and model steadiness of PS-DInSAR. Tianjing City is surveyed in PS-DInSAR fusing ENVISAT ASAR from 2003 to 2007,...
In the age of Internet economy, tobacco commercial enterprise that is an important channel member of the marketization tobacco industry should set up e-commerce marketing concept, should accurately position its marketing object, should focus on satisfying demand of cigarette retail customers and consumer in the process of e-commerce marketing. In the product strategy, tobacco commercial enterprise...
Responses of hydrologic process to human induced land use changes, which have affected a wide portion of China since last century, were evaluated with a coupled land surface-hydrology model. The main land use changes were assessed by the International Satellite Land Surface Climatology Project (ISLSCP) historic (1970) and potential land use types in the Huaihe River basin. The variations of flood...
The effects of road construction and expansion on soil erosion distribution are large, and there exists great spatial variation of different level roads. How to quantitatively analyze the soil loss and their relationship is very important. Taking Lancang county as a case, we calculated the soil loss based on the universal soil loss equation (USLE) and GIS. Also, the average and sum soil loss of different...
The ldquoyellow waterrdquo phenomenon often appears when desalinated seawater entered the old ferruginous water supply systems. Therefore, different tubing water pipe-nets were used to simulate the desalinated seawater distribution process, change of water quality between raw water and pipe water was analyzed as well as the mechanism of ldquoyellow waterrdquo phenomenon. Also, the control indexes...
Phoslock, a novel modified bentonite, was developed by CSIRO. With the innovative principle both on Soluble Phosphate (SP) removal and sediment capping, Phoslock has great efficiency in SP removal, normally 95%, and effective capacity to sediment capping of the bottom slurry for avoiding the nutrient release. From the applications in Australia, China and South Africa, Phoslock demonstrated exciting...
A new filtering algorithm for removing salt-and-pepper noise from gradation images was introduced. Eight directional templates and one nondirectional template were selected to smooth gray-scale images. First to judge which templates the pending pixel should belong to according to compatibility and similitude principle, then using the corresponding template to smooth the pending pixel.The salt-and-pepper...
Current land use and cover (LUC) mapping is often made using high resolution images such as those from the Landsat TM/ETM+, SPOT, IKONOS, QuickBird sensors etc. However, the historical LUC information was often extracted from the earlier Landsat MSS images. Resultant land cover classification accuracy is often unsatisfactory for quantitative change analysis due to the limited number of spectral bands...
The 2-D maximum Tsallis entropy (2DMTE) method not only considers the distribution of the gray information and the spatial neighbor information with using the 2-D histogram of the image, as a global threshold method, but also it often gets better segmentation results and flexibility owing to a parameter than other 2-D entropy methods. However, its performance is sensitive to its parameter. How to...
In this study, we present an integration scheme of preprocessing circuit for detecting optical pulse based FPGA-tech. Using the photoelectric detection technique, the scheme includes a the photodiode detector (PDD), which can convert an optical pulse to a small current signal; and a FPGA produces code to control MUXes for different channel, which changes circuit parameters to adapt different detection...
In order to improve the security and robustness of image retrieval, a novel image hashing algorithm based on fractional Fourier transform (FRFT) for content-based image retrieval (CBIR) application is proposed in this paper. By employing FRFT and normalized Hamming distance, a robust hashing sequence is obtained by preprocessing, feature extracting and post processing. The security of proposed algorithm...
By research on lossy compression technology about about the encrypt coding image, lossy predictive coding is analyzed, and optimal predictors altogether with optimal quantization was set up. Meanwhile, coding image model produces a fairly good effect by application on the encrypt image at the entrance of a network user on the platform of information network under WEB.
Comparing with the rapidly increasing acquiring technology for remotely sensed data, the data processing technologies have been following behind, especially in computing speed and efficiency. However, parallel computing technology provides an effective way to solve this problem. In this paper, based on the analysis of parallel computing system, the architecture of photogrammetric parallel processing...
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