Advanced Materials Research Vols. 291-294

Abstract: In this paper, a method for calculating deformation of long-distance pipeline by using strain is presented. We analyze the pipe as a beam. According to geometric equation of beam’s large deformation, we establish the relationship between strain and displacement. With numerical method, beam’s deformation can be got by using different positions’ strain of a cross-section and a generatrix.

Abstract: The eccentricity coextrusion flow of polymer melt was analyzed based on finite element simulations. Such simulated results as the fields of flow velocity, pressure and shear stress were obtained. Through the analysis of the results, the mechanism of the column interface forming in the axis-symmetry coextrusion flow path was obtained. For the coextrusion flow, if the low viscosity polymer flows near the die wall, the flow would be steady. Whereas, if the polymer with low viscosity is in the core and the high viscosity polymer at the outer region, Which is disadvantage in terms of energy, and the instability flow would occur. This is also accord with the least energy consume theory.

Abstract: This paper proposes a gear fault diagnosis method based on cyclostationary degree and Hidden Markov Model (HMM) theory. By using the demodulation characteristic of cyclostationary degree for AM and FM signals, we extract the characteristic information of the gear working status. This information can be converted into sets of fault feature vector, which is used as the training sample or observed sample of HMM model for gear fault identification. Experimental results show that the gear fault diagnosis method has good recognition result for the four kinds of status of normal, broken teeth, pitting and wear gear.

Abstract: The research dealed with using Wireless Sensor Network(WSN) in the application of tunnel environmental monitoring purpose. First put of this study has concluded in Snow Mt Tunnel for Fire Exam testing.14 nodes have set up during testing.Typical WSN units developed by the research team with about 30 meters communication distance.This stage of study provides the significant data which collected by notebook PC were performed well.Fire dynamic simulator (FDS)software confirmed the monitored information (temperature)，and support the second part of WSN application study.In second part of study，completed WSN are going to be established in Guan Yin Mt Tunnel. Not only temperature MEMS sensor was used，but also CO₂/CO were built in the node. In house study has completed，and 53 nodes were produced，and initial set up test has concluded for the ongoing program. WSN system will be installed in the following stage and the completed monitored information will to be expected and performed.

Abstract: At present, paper industry has a lot of problems in China, such as the shortage of forest resources and high cost of pulping. Paper industry must be seeking high yield and low cost pulping process. In order to reduce the cost of mechanical pulp and increase the use of mechanical pulp, a lot of research and patent showed that the refining energy consumption of mechanical pulp would be further decreased using the corresponding enzyme to modify fiber of the raw materials before refining. The effects of cellulases modification on masson pine mechanical pulp were investigated in this paper. The modification conditions were as follows: the dosage of enzyme 75IU/g (to bone dry materials), temperature 500C, time 150min, pH value 5.5 and pulp concentration 15%. The effects of cellulase modification on the surface and quality of masson pine fiber of mechanical pulp were investigated by scanning electron microscope (SEM), atomic force microscopy (AFM) and fiber quality analyzer (FQA). It was found from the images of SEM that the original fiber surface was smoothly but markedly corroded after the cellulase modification. Moreover, the modification brought about more external fibrillation and longitudinal tearing during refining. AFM measurement results showed that the fiber surface roughness was improved after the cellulase modification because that the middle lamella, primary wall and outer layer of secondary wall were broken. The results of FQA measurement showed that the average fiber length increased slightly.

Abstract: In this paper, green construction project management concepts, analysis the green project management research status of our country, on this basis, establish a green construction project management evaluation system, and study and explore systematically on the evaluation methods. In the low-carbon economy, this increase of green construction project management has important theoretical and practical value.

Abstract: The complex of human-like collagen (HLC) with copper (Ⅱ) was synthesized and analyzed in the present study, and the investigation was performed by UV-vis spectroscopy and FTIR spectroscopy. It can be concluded that there exists interaction between HLC and copper, and the complex is a new chemical compound different from free HLC from UV-vis spectra. In the complex of Cu, human-like collagen acts as the ligand, linking the copper ions via both groups of C=O and N-H.

Abstract: With the support of RS, GIS and FRAGSTATS techniques, the landscape pattern has been analyzed quantitatively in Dianchi basin by 16 commonly used landscape metrics, based on remote sensing images of 1988, 1990, 1994, 1999, 2002 and 2008. After performance of principal component analysis (PCA) on the 16 landscape metrics, three principal components (PCs) were generalized: spatial aggregation of landscape patches, landscape fragmentation and landscape diversity. Then, the characteristics and evolution of landscape pattern in Dianchi basin have been explored at the landscape level. The results showed, that, from 1988 to 1994, the landscape fragmentation was serious and the level of diversity was fluctuant. And for some kinds of landscape patches, the integrity was much undermined, the spatial distribution was scattered and the degree of aggregation was fallen. From 1994 to 2008, the degree of aggregation between patches increased gradually. The situation of landscape fragmentation was under control. And, the land use types had a tendency towards diversification and homogenization.

Abstract: This paper are doing responsive and exploratory test of the pile bearing capacity for squeezing soil. In order to provide the basis for determining the ultimate bearing capacity of the pile foundation for the design and construction units.

Abstract: Because of unscientific evaluation methods for the community infomatization level, the paper analysis various factors affecting the community infomatization level, according to the full life-cycle thinking for infomatization construction, establish the evaluation index system of the community infomatization level and use fuzzy analytical hierarchy process to build a evaluation model of the community infomatization level, which can help us to make an objective fair and accurate comprehensive evaluation for the community infomatization level, help to further development and improvement of community infomatization construction. Finally apply this model to a certain community evaluation of community infomatization level, and give the application process.