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This paper studied effects of vetiver hedgerow and leucaena leucocephala hedgerow on fractal characteristics and erodibility of the purple soil. It took fractal dimension of PSD (particle-size distribution) to describe soil fractal characteristics, and EPIC (erosion-productivity impact calculator) to calculate values of soil erodibility factor K. Results showed that:(1) hedgerows affected spatial...
The composition and working principle of floor radiant heating system of capillary tube are described in this article. On the one hand, PMV(Predicted Mean Vote) index, indoor vertical temperature distribution, and real feel temperature are introduced to discuss the thermal comfort of system. On the other hand, using of exergy analysis method to calculate the floor radiant heating system of capillary...
It is very important to evaluate the competition of the equipment manufacturing industry. The evaluation index system of equipment manufacturing competition was built. Characterization and interpretation of the comprehensive competition of every industry of the equipment manufacturing was done by principal component analysis. Principal component analysis has been shown to be a powerful tool for analyzing...
It will be a good method which is fit for our country to treat the sewage sludge as composting materials. However, an effective process of Sludge Disintegration must be the key precondition for aerobic composting. A hydrodynamic cavitation system and two aerobic digestion reactors were designed and made. The sludge from an MBR(membrane biologic reactor) which has been treating sanitary wastewater...
In this paper, based on the concept of sustainable development, the meaning of furniture green package is put forward, the economic value and the social value of furniture green package technique is analyzed, the application of buffer packing technique, assembly packing technique, and ecological package technique in furniture green package technique are discussed.
In a multi-family dwelling heating systems at least supply heat to the two heat consumers, the solar collectors deliver heat as long as solar power is available, and the auxiliary energy source supplies the missing solar power. The key challenge for us creating a heating system is how to combine the different requirement of heat suppliers and heat consumers into one single, cost-effective, durable...
Wind power prediction is of great importance for the safety and stabilization of grids. The most important and difficult problem now is to enhance the prediction precision. A combined wind power prediction model based on the maximum information entropy principle was built in this paper. The wind power series is non-gauss distribution, so the prediction model involved high central moment besides the...
Using Streptomyces erythreus isolated from pharmaceutical residues as biosorbent, the characteristics and mechanism of its absorbing Pb2+ was studied. The results showed that absorptive ability of bacterial mycelia modified by sodium hydroxide was improved greatly. The optimum conditions should be 0.2 g dosage of bacterial mycelia, time 10 min, pH value 3.5 and room temperature under initial Pb2+...
This paper studied the envelop enclosure and the energy consumption of rural residences in temperate area. Residential building envelope, heating ventilation and air controlling, energy consumption for lighting and cooking, and the utilization of renewable energy are investigated in the form of questionnaire. Combined with the characteristics of temperate area and the income of peasants, this paper...
The behavior of two limestones in CO2 looping cycles and the morphology of calcines after different cycles are presented here. The CO2 cycles were performed in tube furnaces and the resulting samples were observed by a scanning electron microscopy. The sorbents surface area, porosity and pore size distribution were tested by nitrogen adsorption/desorption. It was found that the pore distribution show...
The paper firstly analyzes the operating mechanism of China's small and medium-sized EMCos, finding that fund accommodation and risk management are the two development challenges that they are facing with. Then it analyzes the function of the financial system, finding that some measures of the financial system can solve the problems faced by EMCos. Finally, by analyzing the existing financial support...
The research on dredged silt treatment has been an important topic with the deteriorated environment of lakes and rivers. The pores have great influence on the property of silt flocs. In this paper, some useful pore characteristic was obtained based on SEM image both under natural condition and the state after adding flocculant. The minimum diameter, maximum diameter and mean diameter of pores in...
The paper is intended to solve the problem of environment pollution of Jiangxi Province caused by the growth of the export in this province. Theodore Panayotou, a Faculty Fellow of the Environmental Economics Program at Harvard University, concluded a Function pointing out the relationship between environment quality and the influencing factors U=F(S, C, I, P, T, R, K). Being original, the Function...
Seasonal effects of forest stream and rainfall on the nutrients-pH, the biochemical oxygen demand (BOD), chemical oxygen demand (COD) and dissolved oxygen (DO), total nitrogen (TN), total phosphorus (TP) and ammonia nitrogen (NH3-N) in Huangongwan forest park was monitored monthly during January to December 2009. Lower concentrations of BOD, COD, TP and NH3-N were found in forest stream compared to...
“Natural accumulation type” fiber filter is in high precision but reverse-wash effect is poor. Meanwhile, “orderly loaded type” fiber filter reverse-wash effect is good but it is difficult to improve the filtering effect. This paper puts forward a combination of two types of flexible filter bed advantage from the fiber filtration technology principle of feedback, and through contrast test, it confirmed...
For the aim of ecological security, the unutilized land should be exploited based on its suitability. Taking of unutilized land in Ji'nan city as a case, the paper established comprehensive suitability evaluation model to evaluate the multi-suitability of the unutilized land and to determine its suitable exploitation types. The results showed that limited by ecological factors, the suitable area for...
The effect of different ratios of propionic to acetic acid on the efficiency of enhanced biological phosphorus removal (EBPR) was investigated. Five anaerobic -aerobic sequencing batch reactors(1#-5#)were operated with Synthetic wastewater of acetic acid, different propionate/acetate C-mol ratios of 0.5, 2, 10 and propionic acid to cultivate and enrich phosphorus accumulating organisms (PAOs). It...
S&T innovation is defined as the creation and application of new knowledge and new technology. During the period of S&T innovation, the operators will accept new management model and production way to produce new products, improve quality and provide new service. Because of the different geography traits and resources, the contribution rate of S&T innovation in different regions is expresses...
Image recognition technology is a new plant disease diagnosis. Image segmentation can be isolated lesion and background. The accuracy of its identification has important implications. We propose a new image segmentation algorithm which is based on super-green features and OSTU methods. This segmentation algorithm is good, and easy to implement. It is able to provide good pre-treatment of disease identification...
Genetic Algorithm is one kind of probability searching algorithm of simulating nature organic evolution. As a result of the characteristics which is none of space restrictive supposition restraint and strong robustness, it has obtained the widespread application in many domains at present. However, the simple Genetic Algorithm has the problems of the precocious phenomena, the slow rate of gathering...
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