Applied Mechanics and Materials Vols. 130-134

Abstract: After 50 days long-day maintenance of D. lavandulifolium, seedlings with 6 leaves had different flower bud under different photoperiodic induction during 30 days treatment. The result showed that maximum flower bud (70%) was observed in 12hr light/ 12hr dark and 13hr light/11hr dark after 30 days induction. 11h light/13h dark also showed good flower bud (60%). 30% flowering were observed on 9hr light. None flower bud was observed in control plant. The earliest bud appeared only need 10 days after short-day induction.

Abstract: A fungus with efficient dye decolorization and that generates a microbial flocculation agent was isolated from a wastewater environment and screened. This bacterial strain imposed a significant decolorization effect on azo dyes. On the basis of morphological and microscopic features, the fungus was identified and named A-6. The results show that the decolorization process of the fungus exhibited two types of actions: adsorption decolorization of mycelium and flocculated decolorization of extracellular products in the dyes. The decolorization ratio reached 99.20%

Abstract: During wet season and dry season, the groundwater quality analysis results of one engineering site in Nanning indicated that the causticity of groundwater mainly included acid causticity (pH value), calcareous causticity (corrosive CO₂) and leaching causticity (HCO₃^-). Though the twice analysis results of water causticity are both moderately corrosion, the types of decomposed corrosion are different. It indicated the uncertainty and changeability of decomposed corrosion. In actual projects, some special ingredients in groundwater, the site natural environment and hydrologic geologic conditions should be considered together to define the groundwater’s causticity. Moreover, the change of site hydrologic geologic conditions caused by the construction should be considered, because this change can also influence the groundwater’s causticity. In addition, the groundwater’s causticity will influence the selection of cement types and the type of cement will influence the type of foundation, then all these will influence the construction cost finally. So, the change of groundwater’s causticity caused by the site hydrologic geologic conditions should be considered at engineering design time.

Abstract: With the rapid development of economy and society in China, numerous human activities, including water pollution, overfishing, irrigation, etc., have had a tremendous negative impact on aquatic ecosystems. Ecosystem integrity had also been damaged to some extent, and many problems cannot be effectively resolved by using traditional methods .The research of the causes of changing in water biotic integrity had important practical significance for the sustainable development of China's economy and society. Therefore, there has been a lot of attention on controlling and repairing of water pollution , biotic integrity maintaining in the actual production, The use of new methods , a variety of methods for water pollution combined with analysis, health assessment has also gained great progresses in recent years. This paper reviews the research progress in controlling and protecting water environment and maintaining biotic integrity.

Abstract: A phytoplanktonic investigation of Tanjiang River was conducted in March 2011. 202 species of phytoplankton belonging to 86 genera and 7 phyla were identified altogether. Chlorphyta and Bacillariophyta which occupied 36.14% and 43.56% of the total number were the most, indicating that the green algae and diatom were the dominant group. Tanjiang River was β-meso-polluted to oligo-polluted judging from phytoplankton community while it was clean or light-polluted judging from Shannon-Weaver diversity index, Margalef diversity index and Pielou evenness index. Tanjiang River was light-polluted or oligo-polluted judging from the above indicators in normal water season, but there has been a trend to β-meso-polluted.

Abstract: Experiments were carried out on a tubular furnace. The results showed that the released amount of K and Cl increased with the wheat straw share of the blends, meanwhile the released amount of Cl was far more than that of K. Al and Si from coal can capture K to form KAlSi_xO_y, which would promote the release of HCl. The activity of Al and Si increased with the temperature rising. During combustion, Ca and Mg can react with Al and Si, resulting in an increased release of K and a decreased release of HCl indirectly.

Abstract: Back propagation network can provide dynamic maps and deal with historical data by increasing self-loop. By using the improved circle back propagation neural network, Multi-information fusion algorithm are realized and used to environment control system of textile workshop. Hardware circuit of the system is designed with the embedded microprocessor and appropriate detection devices. The training and algorithmic design of self-loop back propagation network can be achieved by embedded systems programming based on the portable operating system. Application shows that the multi-information fusion control system of textile workshop Environment, which based on local self-loop back-propagation network, has high control precision.

Abstract: This paper presents the techno-economic performance of 600 MW coal-fired power plant with and without MEA-based CO₂ capture process, based on the operating data of an existing power plant. The simulation and analysis are based on ASPEN PLUS, with fully consideration of features of existing coal-fired power plants and the integration of CO₂ capture process with steam cycle. The results show that, when adopting CO₂ capture process, the plant efficiency will decrease significantly. And the cost for electricity will increase dramatically. Through further system integrated optimization, the efficiency fall from 40.28% to 29.61%, which is still tremendous but obviously better performance than before.

Abstract: Theoretical model for calculating the outlet flue gas temperature of limestone-gypsum wet flue gas desulfurization (FGD) absorption tower is important for water consumption calculation. In this paper, the energy balance in the spray zone is analyzed and a model for calculating the outlet flue gas temperature of FGD absorption tower is proposed. An example computation of the outlet flue gas temperature of a typical 600MW class unit’s operation data is introduced, the result has verified the model. A further study of significance analysis has then been made to analyze and simplify the model.

Abstract: In this paper, investigation and analysis on the operation of 3 combined wastewater treatment plants in sunny and rainy days in Wuhan city was made. The operations of lifting pumping stations in these plants were inspected. During sunny days, the processing units and equipments in these plants run in nearly full load and the load can only increase in a small quantity in rainy days. But the total waster water quantity in Wuhan in rainy days would reach to ten times more than wastewater quantity in sunny days. A large amount of untreated wastewater overflows from the channels to the bodies and causes heavy pollution to the water environment.