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Gao Y.,China Automotive Technology and Research Center | Li Y.K.,China Automotive Technology and Research Center | Mo X.B.,China Quality Certification Center
Advanced Materials Research | Year: 2014

Green performance assessment of power battery is a whole life cycle process, which integrates Environment (E), Resource (R), Technology (T) and Cost (C) objectives considered as evaluation of multi-objective and multi-stage. According to definition of Green Product, the assessment model of multi-objective and multi-stage for power battery was built. The green utility function is proposed, by which the evaluation data of indices are changed uniformly into range of (0, 1) according to the assessment standard initialized as 0.5. The synthesis calculation method is given, which remains all the messages in the assessment. Finally, the green performance comparison between lithium-ion battery and nickel metal hydride battery proves the assessment method and process. © (2014) Trans Tech Publications, Switzerland. Source


Jiang Y.,University of Science and Technology Beijing | Shi B.Q.,University of Science and Technology Beijing | Tong L.S.,China Quality Certification Center
ICCASM 2010 - 2010 International Conference on Computer Application and System Modeling, Proceedings | Year: 2010

Basic ideas and computing frameworks of CO (Collaborative Optimization) which is applied to complex system design are introduced. Reliability theory is introduced into CO, and reliability restraint is applied to optimization design. Within the optimization of systematic level of Collaborative Optimization, the slack variable is introduced to let the restraint of consistency equality be transformed to the restraint of non-equality, and makes easily the algorithm convergent. This method realized the parallel reliability based optimization design of the wheel hub reducer of ADT (Articulated Dump Truck), and the results of the optimization were applied to the practical project. © 2010 IEEE. Source


Zhang Y.,Beijing University of Technology | Zhang P.,China Quality Certification Center
Chinese Control Conference, CCC | Year: 2013

Based on Finite Linear Heat Theory, through Virtual Source Method and Green Function Method, in the whole area of double-boreholes vertical U-shape pipe, the heat transfer model outside boreholes in the cylindrical coordinate is established, and the analytical solution of g-function and its modified form are obtained. Using MATLAB, the g-function curve is plotted and the soil temperature field is simulated and analyzed in case that the Ground Source Heat Exchanger works in cooling mode. In the end, the double-boreholes heat transfer process is simulated by PDE toolbox to verify the accuracy of the model. © 2013 TCCT, CAA. Source


Wang F.,Center for Atmosphere Watch and Services | Wang F.,China Quality Certification Center | Lin W.,Center for Atmosphere Watch and Services | Wang J.,Peking University | Zhu T.,Peking University
Advances in Climate Change Research | Year: 2011

The exchanges of NOx between snow and air have significant impact on the atmospheric components and photochemical processes in the overlying boundary layer. Such exchanges increase the oxidizing capacity of the atmosphere and may have a crucial impact on the air signals that are retrieved from ice cores. In the recent years, sunlit snow and ice have been demonstrated to be important NOx sources in the polar atmospheric boundary layer. This paper makes a thorough review on the release of NOx from snow and ice, including field observations and experimental evidences, release mechanisms and influential parameters that affect such a release process, polar NOx concentrations and fluxes, and environmental impacts of the chemical processes of NOx in the polar atmospheric boundary layer. In the Tibetan Plateau, the released NOx observed recently in the sunlit snow/ice-cover is 1-order magnitude more than that in polar regions, but further scientific research is still needed to reveal its impact on the atmospheric oxidizing capacity. Source


He L.,Xidian University | Zhang X.,China Quality Certification Center
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2013

Taking noise non-destructive character and evaluation technique of solar cells as research object, the 1/f noise, g-r noise and plasma noise in solar cells were researched through stress aging and noise test. The results showed that noise has a relationship with defects, the different defects in different regions can be characterized by noise based on the noise generation mechanism and device fault physics. So the quality estimate and reliability predict can be achieved. Source

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