水雾荷电特性的试验研究

通过试验研究,总结出环状电极水雾荷电的特点和规律,为水雾荷电应用于湿式除尘提供了科学的依据。     

浅谈我国机动车尾气排放现状、危害及防治对策

全面地介绍了我国机动车尾气的污染现状、存在的问题及其危害,并根据我国的具 体情况,提出了相应的防治对策。     

上海开发风电CDM项目的机遇分析

《京都议定书》的正式生效，促进了世界清洁发展机制（cDM）项目的迅速开发。由于上海经济发展迅速，能源消耗较大，有潜力进行CDM项目开发。上海电力是上海能耗较大的行业之一，应该积极进行CDM项目研究。文章分析了国家电力行业开发CDM的主导方向，根据已有方法学的选择原则。上海电力行业首选发展风电CDM项目。探讨了上海发展风力发电项目的潜力和可行性。以辉腾锡勒风电场CDM项目为例，介绍了我国风电CDM项目注册成功的经验。     

Electrosensory basis for individual recognition in a weakly electric, mormyrid fish, Pollimyrus adspersus (Günther, 1866)

Pollimyrus adspersus discriminates the individually variable waveforms of Electric Organ Discharges (EODs) of conspecifics of only 150–250 s duration. We examined: (1) the discrimination threshold for artificially generated EODs of similar waveform, (2) the mechanism of signal analysis (spectral vs temporal) present, by determining the discrimination between different waveforms of identical amplitude spectra, and (3) the threshold field intensity and reach of discrimination. The triphasic P. adspersus EOD waveform was artificially generated by superimposing two Gaussians, one wide, the second narrow, inverted, and of threefold amplitude. The natural variability among individual EOD waveforms was simulated by phase-shifting one Gaussian relative to the other. The symmetrical waveform where the peaks of the two Gaussians coincided was used as a reference (phase shift=0, rewarded stimulus S+). Results were: (1) in food-rewarded conditioning experiments, trained fish (N=7) detected a phase-shift in artificial EOD stimuli as low as 2 s (N=2 fish), 6 s (N=1) and 10 s (N=1). (2) All fish tested (N=3) discriminated between artificial EODs of identical amplitude spectra but different waveforms (hence, different phase spectra), demonstrating a temporal mechanism of signal analysis. (3) The maximum reach of waveform discrimination was 130 cm at 4.9 V_p-p/cm and 100 S/cm water conductivity (test signal generated at natural amplitude), that is, similar to the reach of EOD detection. Therefore, among the three kinds of electroreceptor organ present in mormyrids, we consider Knollenorgane the relevant sensory organs for EOD waveform discrimination.Communicated by J. Krause     

一种计算粒子电迁移率的新模型

近几年来,粒子电迁移率引起了更多学者的注意。因为它是表征带电粒子在电场中运动的重要参数之一。在这方面,人们已作了大量的研究工作,提出了一些计算粒子电迁移率的理论和半经验模型。基于前人的研究,本文提出了一种计算粒子电迁移率的新模型,并用前人的实验结果和本研究的实验结果对此模型进行了检验。计算结果和实验数据很吻合。就某种意义上讲,此模型是对以前模型的扩展和改进,它可广泛应用于溶胶的研究和工业应用。     

长袋低压大型脉冲袋式除尘器在100t直流电弧炉除尘系统中的应用

阐述了长袋低压大型脉冲袋式除尘器在100t直流电弧炉的除尘系统中的流程、设备特点及运行效果.     

关于电气安全工程学学科的思考

以“环境系统人”作为电气安全工程学的研究对象 ,通过对环境、系统、人各个要素及相互之间关系的分析 ,详细探讨了电气安全工程学的研究内容 ,并对学科今后的新的研究领域提出建议。     

Studies on Pollutant Dispersion from Moving Vehicles

Remote sensing instruments may be used to make measurements of emission levels from individual vehicles under realdriving conditions. In designing such an instrument, that will identify the gross polluters, the CFD modelling approach has been used to study the effects of the parameters involved on the characteristics of the exhaust gas plume. The analysis was performed using the ADREA-HF code in open space, street canyon and tunnel environments, with sensitivity parameters the car speed and meteorological conditions. The calculations have been performed in a moving coordinate system, with the car and site geometry being fully resolved. A discussion is given on the effects of the various parameters affecting the design of the instrument.     

An Application and Evaluation of the CAL3QHC Model for Predicting Carbon Monoxide Concentrations from Motor Vehicles Near a Roadway Intersection in Muscat,Oman

The CAL3QHC model was used to predict carbon monoxide (CO) concentrations from motor vehicles at an existing urban intersection (Star Cinema in Muscat area, Oman). The CO concentrations predicted from the model were compared with those measured in the field. Predicted average CO concentrations were found to compare favorably with measured values obtained at all eight receptors considered within the modeled intersection. In general, the comparison indicates good agreement with some underprediction for CO. For receptor 6, the model overpredicts the average CO concentration. This overprediction is associated with the presence of trees and green area in the location of receptor 6. In general, the measurements and the model results indicated that the highest CO concentrations were found to occur close to the intersection and, hence, a decrease in the concentration levels was seen as the distance from the road increased. The results indicated that the levels of CO were well below the ambient air quality standard and that probably no health risk was present in areas adjacent to the star cinema intersection. However, the predicted worst-case 1-h CO concentrations assuming inversion atmospheric stability conditions (class F) and wind speed of 1 m/s indicated that the levels of CO were close to or higher than the Omans National Ambient Air Quality Standards (NAAQS) value of 35 ppm at all receptors considered. The results of this study are useful in transport development and traffic management planning.Published online.     

Assessing the economics of pre-fragmentation material recovery within the UK

The 2006 end-of-life vehicles (ELVs) directive target for the recycled and reused material content of an ELV has been undertaken using the current recovery infrastructure within the UK. The current expectation is that the conformance for the 2006 recycling target will be mainly achieved using existing post-fragmentation separation technologies rather than manually disassembling vehicles into their constituent materials. With the economic pressure of the current legislative targets weighing heavily on end-of-life stakeholders, and the further increase of recycling levels for 2015, it is important to understand “when” and “if” manual dismantling activities become economically viable within a dramatically changing vehicle recovery industry. This paper describes a method of costing the dismantling of specific makes and models of vehicle due for retirement in 2015, and discusses the economic implications of such practice and possible strategic directions for pre-fragmentation vehicle recovery.