电子政务数据共享模式研究

互联网的广泛应用,改变了社会公众对政府信息需求的观念。加强电子政务数据共享是社会发展的必然要求。为了保证政务信息的有效共享,实现不同部门不同类型数据的转换和重用,提出了一种新的基于公开密钥基础设施体系构造数据共享模式。在新的数据共享模式中,使用电子凭证替代传统的纸质凭证,增加了行政审批事务办理的快捷性、安全性、低碳环保性。为了进一步提高电子凭证的效率,将其与云计算无缝融合。通过对具体应用案例的分析,表明新的数据共享模式具有安全性、可行性和实用性。     

浅谈在AutoCAD环境下的“母线”提取应用

随着AutoCAD在地形图中的应用,对其进行了二次开发,使其能方便的用于制图,有很多开发者喜欢用"块线型"来表示一些线状地物。作者通过自己分析AutoCAD三种不同类型的"母线"存放方式,总结出统一的"母线"提取办法。避免重新数字化的麻烦,大大的减少了工作量,节省了宝贵的时间,方便了作图,提高了工作效率。     

中国机械工程学会铸造分会创建40周年回顾

对中国机械工程学会铸造分会成立40年来的各种工作进行了回顾和总结，将学会的工作分为3个阶段，即初创阶段、恢复阶段和成长阶段，对各阶段铸造分会理事会的组成，组织的学术年会、国际会议、编辑出版工作、展览（展示）活动、国际交流等进行了回顾。     

结晶器液压振动技术在梅山高效连铸中的应用

为了得到较好的铸坯表面质量,满足生产高附加值、高技术含量的钢种要求,梅山炼钢厂在2#高效连铸机上引进了国际上较先进的结晶器液压振动技术,具体介绍了该结晶器液压振动技术的基本参数和实际应用。     

漏液的不均布对塔板效率影响

依据液体二维不均匀流动、二维涡流扩散模型，建立了在给定汽液平衡关系式条件下，提出了一个不均匀漏液对板上液体浓度分布影响的数学模型，在此基础上，采用差分法对该模型进行求解。讨论了在不同的参数（包括）下不均匀漏液对板效率的影响，以图表的形式给出。结果表明，漏液的不均布确实会对板效率产生重大影响，在计算板效率时应以漏液不均匀为条件。     

O3/H2O2 Treatment of Methyl-terf-Butyl Ether in Contaminated Waters: Effect of Background COD on the O3-Dose

The destruction of methyl-tert-butyl ether (MTBE) in contaminated waters by O₃/H₂0₂ process was studied and the influence background COD, alkalinity, and hydrogen peroxide and MTBE concentrations on process treatment efficiency and ozone dosage was investigated. The treatment efficiency was evaluated by an Efficiency Index, which is based on electrical energy requirement for ozone production. It was found that the treatment efficiency decreases linearly with increasing concentrations of MTBE at constant background COD and with background COD at constant MTBE concentration. A simplified kinetic scheme was presented to account for these observations.     

板式精馏塔的塔板效率

塔板效率包括:点效率、莫夫里效率和全塔效率,它们的值主要受流体多相流动时的动力学体系特性的影响;点效率可由双膜理论推出,莫夫里效率和全塔效率存在一定的内在关系。     

Smart pricing scheme: A multi-layered scoring rule application

Defining appropriate pricing strategy for smart environment is important and complex task at the same time. It holds the primal fraction in Demand Response (DR) program. In our work, we devise an incentive based smart dynamic pricing scheme for consumers facilitating a multi-layered scoring rule. The proposed strategy characterizes both incentive based DR and price based DR programs facilities. This mechanism is applied between consumer agents (CA) to electricity provider agent (EP) and EP to Generation Company (GENCO). Based on the Continuous Ranked Probability Score (CRPS), a hierarchical scoring system is formed among these entities, CA–EP–GENCO. As CA receives the dynamic day-ahead pricing signal from EP, it will schedule the household appliances to lower price period and report the prediction in a form of a probability distribution function to EP. EP, in similar way reports the aggregated demand prediction to GENCO. Finally, GENCO computes the base discount after running a cost-optimization problem. GENCO will reward EP with a fraction of discount based on their prediction accuracy. EP will do the same to CA based on how truthful they were reporting their intentions on device scheduling. The method is tested on real data provided by Ontario Power Company and we show that this scheme is capable to reduce energy consumption and consumers’ payment.     

On the Performance of Ozone Generators Working with Dielectric Barrier Discharges

The parameters, which determine the performance of ozone generators, are efficiency and maximum ozone concentration. The efficiency from oxygen has been found to be nearly independent on the kind of barrier discharge arrangement (volume, surface, coplanar), while the ozone concentration saturation level depends on the specific design of the generator. These phenomena are explained with features of the discharge process and the properties of chemical reactions, respectively. The importance of a limit in the energy density of the discharge is highlighted.     

Numerical and experimental study on the biofiltration of toluene vapor

We have solved both steady state and transient problems on the biofiltration of toluene vapor. The effect of inlet toluene concentration and inlet gas-flow rate on the removal rate of toluene and the elimination capacity of a lab-scale biofilter has been investigated. In this study, the effectiveness factor was a function of pollutant concentration. The dynamic solutions show good agreement with experimental results. At an inlet toluene concentration of 100 ppm, the diffusion of toluene into biofilm was obviously a rate determining step. Above 200 ppm, however, biofilm already showed full activity. The steady-state simulation confirmed that the change of elimination capacity obtained by increasing only inlet toluene concentration was the same as that obtained by increasing only flow rate of contaminated air. The maximum possible performance is about 20 g/m³h with no addition of nutrients.