Advanced Materials Research Vols. 424-425

Abstract: The carbon sink function of nurturing forest and artificial forest have special important status in ecological protection and economic construction.This article calculates carbon sink potentiality of nurturing forest and artificial forest in Daxing'anling combining afforestation area data since "Natural Forest Protection II",applying forest volume expansion method and combining carbon sequestration function of forest. The result shows that the carbon sink potentiality in Daxing'anling is considerable.If we can explore its potential carbon value ,it will be a new source of revenue which will be a new solution to resource, environment and economy crisis.

Abstract: On the diesel engine’s test bed, this paper has studied the parameters regarding the diesel engine’s rotational speed, the piston ring’s width and wearing capacity and so on, and their relation with the output signal of the magnetoresistive sensor under the reverse drawing of the diesel engine. The research discovered that the piston ring’s wear and the magnetoresistive sensor’s output have the corresponding relationship. And on the oil tanker with the 6RTA52U diesel engine, the influence of the diesel engine’s operating parameters and the load situations to the magnetoresistive sensor’s output is surveyed under four kinds of different operating modes. The test result and the research conclusion provide the technical foundation for the online Wear monitoring of the large-scale marine diesel engine’s piston ring.

Abstract: Using a model in which Fe at 6g sites is assumed to be partially replaced by Co, the electronic ground structure of BaCo₂Fe16O₂₇ and the origin of the electrical conductivity have been studied within framework of the generalized gradient approximation (GGA) plus Hubbard U (GGA+U) calculation. Replacement of Fe at 6g site of BaFe₁₈O₂₇ by Co causes the mixed valence states of Fe cations at 6g sites to vanish and the charge carrier density to lower. This is the main reason why both of materials reveal high electrical conductive anisotropy and the electrical resistivity of BaCo₂-W is 10³~10⁴ times higher than BaFe₂-W.

Abstract: This study aimed to optimize the culture conditions (agitation speed, aeration rate and stirrer number) of hyaluronic acid production by Streptococcus zooepidemicus. Two optimization algorithms were used for comparison: response surface methodology (RSM) and genetic programming coupling Quantum-behaved particle swarm optimization algorithm (GP-QPSO). In GP -QPSO approach, GP is employed to model the microbial HA production and QPSO algorithm is used to find out the optimal culture conditions with the established GP estimator as the objective function. The maximum predicted value of HA production by RSM and GP-QPSO was 5.27 and 5.57 g/l, respectively. Here though both RSM and GP-QPSO approach provided good predictions, yet the proposed GP-QPSO method showed a clear superiority over RSM for both data fitting and optimization capabilities

Abstract: Compelled by the shortage of non-renewable energy and long-term development of society, the purpose of this study was to test the feasibility and possibility of the widespread of battery electric vehicles (BEV) to substitute fuel vehicles. “Life cycle cost” (LCC) model was used to compare the cost of electric vehicle and gasoline vehicle from 2009 to 2035 year assuming that the cost is charged by “per-mile-cost”. After 2019, the cost of EV will manifest its superiority. It was concluded that the vehicle manufactures should strive to improve the performance of battery technologically, especially the number of charge cycle first and the government can provide fuel tax or financial subsidy for costumes to buy EV or provide research fund to assist technological improvement to boost the widespread of EV

Abstract: Video object extraction is a critical task in multimedia analysis and editing. Normally, the user provides some hints of foreground and background, and then the target object is extracted from the video sequence. In this paper, we propose a object segmentation system that integrates a clustering model with Markov random field-based contour tracking and graph-cut image segmentation. The contour tracking propagates the shape of the target object, whereas the graph-cut refines the shape and improves the accuracy of video segmentation. Experimental results show that our segmentation system is efficient

Abstract: The dependence of electron spin relaxation on the carrier density are investigated based on the D’yakonov-Perel relaxation mechanism. Experimental results obtained by using femtosecond pump-probe technique in AlGaAs/GaAs multiple quantum wells at room temperature show that the spin relaxation time increases from 58 to 82ps at carrier density of 1×1017 to 1×1018cm－3 consistent with the theoretical prediction. This result reveals that with the increment of the carrier density, the spin orbit interaction reduces due to the more frequent momentum scattering and the spin relaxation time prolongs

Abstract: With a typical residential construction in Zhengzhou, basing on the DEST software, a residential building load calculation program has been established. The hourly heating load has been simulation calculated about the residential construction, and the load distribution characteristics has been analyzed basing on calculation, it is found that daily maximum heating load is mainly concentrated on between 6:00 to 8:00. Through the load distribution that the proportion of part-load operation can reach to 75% or more, and the study provided technical support for the controlled program about the winter air-conditioning system

Abstract: NET Remoting is a way of communication between the processes in .NET frameworks. It can be used for communication between different applications based on CLR on different computers on the network, it can also be used for communication between different applications based on CLR on the same computer. Firstly, the working principles of .NET Remoting are discussed. Secondly, a basic structure model for file transfer system based on .NET Remoting is proposed. Finally, gives the implementation of a file transfer and management system using .NET Remoting and SQL Server, which is safe, efficient and practical

Abstract: The existing hardware circuits can only measure a single point temperature in a small range owing to the influence of extremely little output voltage and the poor linear degrees of thermocouple on testing temperature ,and it is difficult to meet the demand of practical use because of its low measurement precision . This system realized accurate measurement of multipoint temperature in a large range using optimization design to overcome the above-mentioned defects,, It uses low maladjustment and high precision operation amplifier ADOP07 to constitute the inphase and shunt-wound difference amplification circuit to carry out non-electric measurement of thermocouple It also uses the CD4051 chip to compose the switch circuit at different time in order to realize the measurement of multi-thermocouple ,and the ICAD538 is used to implement square operation in order to make linear compensation of temperature , finally sends the measurement value to single-chip computer through A/D converter to process data which is controlled by the application of modern fuzzy controlling theory so as to reach the aim of precise measurement and control. The experiments show the system can realize accurate measurement of multipoint temperature in a wide from 20 to 400°C, and the experimental results are satisfying