Advanced Materials Research Vol. 977

Abstract: A hybrid model is proposed which is a combination of MLRM (Multiple Linear Regression Model) and GM (Gray Prediction Model). The paper conducts a line loss rate forecast of the grid, and develops a kind of forecasting software for the line loss managers of grid enterprises to realize the analysis and forecast of factors which impact the daily loss line rate. Finally, do simulation examples with line loss rate data of a city using the software. The results demonstrate that the models selected in the software have good feasibility in line loss rate forecasting, and can overcome the adverse effects of factors on the model, improve the accuracy of prediction and provide the basis for the scientific and reasonable loss reduction plan.

Abstract: Due to the inconvenience of characterization of the degradation of power battery based on capacity fading, this paper proposes a new characterization measure for battery degradation based on declining point. After the declining point is defined and calculated, Olivier-Louis mode is used to fit the discrete discharge experimental data from NASA, the linear correlation between the declining point and capacity is confirmed by correlation analysis and regression analysis, therefore the declining point is verified to be an effective characterization measure of battery degradation.

Abstract: We introduce a one-dimensional Zero-Range Process (ZRP) with a defect site to describe the condensation. We concern the critical density in the ZRP. We also concern the critical density in the Zero-Range with many defect sites. by using the local coefficient ,we can get the critical density which is accord with theoretically critical density .

Abstract: We introduce a one-dimensional Zero-Range Process model (ZRP) and dynamics to describe the condensation. We concern the critical density when the system get the thermal balance in the ZRP. A new parameter is introduced and discussed. and by using the local coffecient,we can get the critical density which is accord with theoretically critical density with a method of numerical simulation in the system with random updating rule.

Abstract: The economy of heat recovery system which changes due to the drain system is analyzed qualitative and calculated quantitative using Equivalent Enthalpy-drop Partial Quantitative Method (EEDPQM). By comparing with the results calculated by the Equivalent enthalpy-drop whole calculation method (EEDWCM) and the conventional heat balancing method (CHBM), this paper points out that the EEDPQM is a approximate calculation method when it is used to calculate the economy changes of heat recovery system due to the drain system. Then the EEDWCM is proved to be absolutely consistent with the CHBM, and in most cases the EEDPQM is consistent with the EEDWCM and CHBM while in some particular case (such as the changes of the drain system) it is not consistent and the expression of error item is given in this paper.

Abstract: As one of the most important means to obtain formation information, logging technology plays an important role in the identification and evaluation of shale gas reservoirs. This paper describs the formation mechanism and influential factors of shale gas reservoir storage characteristics from mineral composition and pore structure,etc. and discusses method for evaluating the TOC.

Abstract: To ensure the accuracy and stability of results of coal oxidation and spontaneous combustion in the process of thermal analysis experiment, the speed and time of coal oxidation must be moderate, and the characteristic parameters in the oxidation process can be fully reflected. Thermal analysis experiment at different heating rates, with several particle sizes and different sample quality, Huangling coal sample as the research object, were carried out in this paper. Results showed that the particle size of 0.075 mm to 0.109 mm, sample quality of 5 mg and the heating rate of 10 K•min^-1 could ensure the fully oxidation and pyrolysis of coal, under which conditions coal spontaneous combustion characteristics could be reflected by the characteristic temperatures.

Abstract: Powertrain system of pure electric city bus is composed mainly of battery, motor and transmission, it decide practically the acceleration performance of pure electric city bus. The method and principle of parameters design for dynamic system of pure electric city bus was investigated in this paper. Based on parameter matching for electromotor, cells and driveline, a performance simulation model was developed utilizing the dynamic simulation software of advanced vehicle simulator. The acceleration performance of pure electric city bus was simulated in CYC_ECE_EUDC drive cycle. Simulation result indicates that the acceleration performances of pure electric bus and maximum mileage were satisfied to the design requirement. Description that pure electric city bus powertrain system and simulation model were reasonably.

Abstract: To improve the ability of capturing the wind energy of wind turbine and shorten the design period is of great importance to designing wind turbine blade. The article established S809 airfoil model with trailing edge flaps, The gap of the frontal subject and trailing edge flap adopt uniform gap structure, this structure will reduce the influence of the gap on aerodynamic characteristics.Using the k-ω Two equation turbulence model , the article calculated aerodynamic performance of S809 with 10% chord length trailing edge flaps under different deflecting angles. Results show that gap between the main body and trailing edge flap has little effect on airfoil aerodynamic performance, however, the deflection Angle of Trailing edge flap have great affect on airfoil aerodynamic performance, when deflection Angle of trailing edge flap is 14 ° degrees ,the lift-to-drag ratio is the largest.

Abstract: In this paper, it will take in-depth research, site practical methods, and provide reasonable solutions to several key problems, such as conveyor and hydraulic support sliding；shearers badly sloped；the roof management of return airway when the working face lengthened；dealing with the upper corner gas；gangue fleeing；turn mining，which seriously affect production during high inclination-angle fully mechanized mining at 3# coal seam of the second mining section of ChengShan coal mine.