Applied Mechanics and Materials Vols. 71-78

Abstract: According to China's typical dual-economic structure characteristics, the paper develops a general equilibrium model of urban-rural sectors through introducing the resource-environmental constraint. With the model, Jiangxi province of China is taken as a case to be calibrated, and the result shows that when the transfer level from rural population to urban sector is at a steady path, the equilibrium urbanization level z is 79.23%.

Abstract: Present study deals with the evaluation of biosorptive removal of nickel by Flavobacterium sp. Experiments have been carried out to find the effect of various parameters such as initial pH, contact time and initial metal ion concentration. Adsorption equilibrium studies showed that Ni(II) adsorption data followed the Langmuir model, the maximum binding capacity of Ni(II) was 64.20 mg/g at pH 7.0. Kinetics of nickel biosorption by Flavobacterium sp. biomass is better described by pseudo second order kinetic model. The equilibrium isotherm data are very well represented by Langmuir isotherm equation, which confirmed the monolayer coverage of nickel onto Flavobacterium sp. biomass. It was also clearly observed that The present study indicated that Flavobacterium sp.biomass may be used as an inexpensive and effective biosorbent for the removal of Ni(II) ions from environmental wastewater.

Abstract: In this paper, the spatial distributions and seasonal dynamics of soil microbes and microbial biomass were investigated in a typical reed marsh in Zhalong natural wetlands.We wanted to explore the main factors that impacted their spatio-temporal patterns. The results showed that: Bacteria were dominant, followed by actinomyces and fungi were at least in the soil microbes community. The seasonal dynamics of soil microbial biomass carbon and nitrogen were more regularly, and their change patterns were significantly as "W" types. The response of soil microbial biomass in Bottom (10-30cm) to time was slower than the surface, and it fluctuated tinily in every months. The correlation analysis shows that the soil nutrient and soil microbial activity had close relationship. Soil microbial biomass carbon and nitrogen were all significantly positively correlated to quantities of fungus, organic carbon content and Alkali-hytrolyzabel N content(P<0.01), but negative extremely significantly correlated with pH (P<0.01).

Abstract: The simulation for the situation of inverted T composite slab of precast fabricated construction is done, to analyze the stress distribution in the T composite slab of precast fabricated construction, shows that, the maximum deflection exhibits in the middle of plate. Due to the grouting of the concrete, the T plate and the concrete take effect simultaneously, to make the moment of inertia increase greatly, lower the deformation of the composite plate, and increase the resistance capacity. The T plate is pre-stressed, the stress in the x direction of steel bar will increase to the maximum value with the time pass. The result will give some guidance for the real practice.

Abstract: Environmental estrogen could mimic natural estrogens thereby disrupting the endocrine systems of human and animals. The actions of such endocrine disruptors have been studied mainly on reproduction and development. To explore the estrogenic effects of NP by reporter genebased assays we developed. pERE-GFP plamid was generated by inserting estrogen response element fragment into pGADD153-GFP. the recombinant was confirmed by restriction enzyme map and transfected into SPC-A1 cells to ensure the expression of green fluorescent protein．The assay we established in usful, NP could induce the estrogenic activities at any of the tested concentrations.

Abstract: In this study, the sample data was based on 2190 branch length samples of 30 trees from dahurian larch (Larix gmelinii Rupr.) plantations located in Wuying forest bureau in Heilongjiang Province. A second order polynomial equation with linear mixed-effects was used for modeling branch length of larch tree. The LME procedure in S-Plus is used to fit the mixed-effects models for the branch length data. The results showed that the polynomial model with three random parameters could significantly improve the model performance. The fitted mixed effects model was also evaluated using mean error, mean absolute error, mean percent error, and mean absolute percent error. The mixed model was found to predict branch length better than the original model fitted using ordinary least squares based on all errors. The application of mixed branch length model not only showed the mean trends of branch length, but also showed the individual difference based on variance-covariance structure.

Abstract: Oil pollution is considered as one of the pollutants that are harmful to the marine environment. An approach based on both analytic hierarchy process (AHP) and second order fuzzy comprehensive evaluation (FCE) is firstly presented to evaluate oil spill pollution level for offshore platform. The results show that the proposed assessment method is accurate for oil spills, and the model provides a certain technical support for the emergency decision-making department to take the emergency measure.

Abstract: Structure of dusty feeder on the principle of negative pressure was discusses. From the practical design of a pneumatic transportation system in charging solid dusty material, the process data and property parameters used as the base in design were indicated. The selection of process, the determination of the parameters and the calculation of the transportation piping were described in detail, providing a theoretical basis for the mechanical use of rubber and other industries.

Abstract: The operation of BIPV case study aimed to the environmental effects of the architectural design on landscape, which estimated the usability between human behavior and renewable energy on the design management. The BIPV project was the landmark of the local city hall, when it was built in Tainan Country in 2005, and it was the first BIPV research model in Taiwan. The multifunction covered three aspects: renewable energy usage, green site planning and underground parking lot. The BIPV working system was a hybrid system, which used 219 pieces PV modules by glass-to-glass type, and had total PV capacity of 24.09kWp. In the PV renewable energy, the DMY data was from 1.42 to 1.82 (kWh/day/kWp) and the PR value was form 36.6%-49.2%. For consideration of each evaluated factors, the architectural esthetics and energy design of the BIPV research case was not perfectly balance in the project. The citizens could accept this modern urban park as a friendly design for usage. But the PV power efficiency, the excessive design and inexact distribution decreased its power performance too much. Ultimately, the research presented an intensely interesting data for Taiwan BIPV development between the PV industry and architectural design.

Abstract: SCRUBBER substitution in on-line H₂S analyzer was prepared as modified treatment molecular sieve in the media of some buffer solutions , by ionic of acetates exchanged in the solution. Results showed that this substitution was satisfied for H₂S analyzer on-line, and better than America’s, with 99.9% of scrubbing SO₂ and 99.4% of transforming H₂S.