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改进和规范GDP核算工作对四川经济的影响——访省统计局国民经济核算处处长王光彩
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作者 赵丽 《四川省情》 2005年第3期9-11,共3页
关键词 GDP核算工作 四川经济 统计局 国民经济 核算处 王光彩 统计体制
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平凡岗位上的奉献者——记“首都劳动奖章”获得者李艳春
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作者 白峰 《北京统计》 2004年第5期42-43,共2页
关键词 京市统计局 国民经济核算处 “首都劳动奖章” 李艳春 统计工作
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Numerical simulation for influences of pressure solution on T-H-M coupling in aggregate rock
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作者 张玉军 琚晓冬 《Journal of Central South University》 SCIE EI CAS 2014年第10期3936-3944,共9页
The pressure solution model of granular aggregates was introduced into a FEM code which was developed for the analysis of thermo-hydro-mechanical(T-H-M) coupling in porous medium. Aimed at creating a hypothetical mode... The pressure solution model of granular aggregates was introduced into a FEM code which was developed for the analysis of thermo-hydro-mechanical(T-H-M) coupling in porous medium. Aimed at creating a hypothetical model of nuclear waste disposal in unsaturated quartz aggregate rock mass with laboratory scale, two 4-year computation cases were designed: 1) The porosity and permeability of rock mass are functions of the pressure solution; 2) The porosity and the permeability are constants. Calculation results show that the magnitude and distribution of stresses in the rock mass of these two calculation cases are roughly the same. And, the porosity and the permeability decrease to 43%-54% and 4.4%-9.1% of their original values after case 1 being accomplished; but the negative pore water pressures in cases 1 and 2 are respectively 1.0-1.25 and 1.0-1.1 times of their initial values under the action of nuclear waste. Case 1 exhibits the obvious effect of pressure solution. 展开更多
关键词 pressure solution aggregate rock thermo-hydro-mechanical(T-H-M) coupling numerical simulation
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Parallel scheduling strategy of web-based spatial computing tasks in multi-core environment
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作者 郭明强 Huang Ying Xie Zhong 《High Technology Letters》 EI CAS 2014年第4期395-400,共6页
In order to improve the concurrent access performance of the web-based spatial computing system in cluster,a parallel scheduling strategy based on the multi-core environment is proposed,which includes two levels of pa... In order to improve the concurrent access performance of the web-based spatial computing system in cluster,a parallel scheduling strategy based on the multi-core environment is proposed,which includes two levels of parallel processing mechanisms.One is that it can evenly allocate tasks to each server node in the cluster and the other is that it can implement the load balancing inside a server node.Based on the strategy,a new web-based spatial computing model is designed in this paper,in which,a task response ratio calculation method,a request queue buffer mechanism and a thread scheduling strategy are focused on.Experimental results show that the new model can fully use the multi-core computing advantage of each server node in the concurrent access environment and improve the average hits per second,average I/O Hits,CPU utilization and throughput.Using speed-up ratio to analyze the traditional model and the new one,the result shows that the new model has the best performance.The performance of the multi-core server nodes in the cluster is optimized;the resource utilization and the parallel processing capabilities are enhanced.The more CPU cores you have,the higher parallel processing capabilities will be obtained. 展开更多
关键词 parallel scheduling strategy the web-based spatial computing model multi-core environment load balancing
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Investigation of radionuclide ^(60)Co(Ⅱ) binding to TiO_2 by batch technique,surface complexation model and DFT calculations 被引量:4
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作者 REN XueMei YANG ShiTong +2 位作者 TAN XiaoLi CHEN ChangLun WANG XiangKe 《Science China Chemistry》 SCIE EI CAS 2012年第9期1752-1759,共8页
The interaction between radionuclides and solid/water interfaces is important to understand the physicochemical processes of radionuclides in the natural environment.Herein,the interaction of 60Co(Ⅱ) with TiO 2 in aq... The interaction between radionuclides and solid/water interfaces is important to understand the physicochemical processes of radionuclides in the natural environment.Herein,the interaction of 60Co(Ⅱ) with TiO 2 in aqueous solution as a function of pH and ionic strength was studied by using batch technique combined with surface complexation model and density functional theory(DFT) calculations.The batch experimental results showed that the adsorption of 60Co(Ⅱ) was dependent on pH and independent of ionic strength,indicating the formation of inner-sphere surface complexes on TiO 2 surfaces.The results of surface complexation models and DFT calculations indicated that the surface species of 60Co(Ⅱ) adsorbed on TiO 2 followed the trend:B structure(i.e.,60Co(Ⅱ) was linked to one bridge oxygen site) was the dominant surface species at low pH,and TT structure(i.e.,60Co(Ⅱ) was linked to two terminal oxygen sites) became the important surface complex at neutral and alkaline pH values.These results demonstrated that a multi-technique approach could lead to definitive information on the structures of adsorbed 60Co(Ⅱ) at the molecular level at the TiO 2 /water interfaces,as well as realistic models to rationalize and accurately evaluate the macroscopic manifestations of radionuclide adsorption phenomena. 展开更多
关键词 radionuclide ^60Co(Ⅱ) TIO2 INTERACTION surface complexation model DFT calculations
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