Formulation of a Biodegradable Detergent for Cleaning Oily Residues Generated during Industrial Processes

The use of toxic petroleum-based heavy oils is common in industrial processes. The cleaning of machines, equipment, and other surface covered in these oils is achieved with expensive products that are often also toxic and harmful to both the health of workers and the environment. The present paper proposes the development of a sustainable biodetergent made from plant-based materials. Tests were performed to determine the properties of the biodetergent in terms of its surfactant and emulsifying capacities, stability, toxicity, and the removal of heavy oil from glass plates and metallic surfaces. The formulation was composed of a natural solvent (cottonseed oil), a plant-based surfactant agent (saponin), and two natural stabilizers (carboxymethylcellulose and glycerine). The formulation was stable, nontoxic, and highly efficient, removing 100% of the heavy oil from glass and metallic surfaces. This solution developed in this study could be used in diverse industries with the need to clean machines and parts encrusted with oil and grease as well as the cleaning of floors covered with petroleum-based residues. A preliminary analysis of the economic feasibility of using the detergent was carried out at a Brazilian power plant. Besides the reduction in environmental impact due to the use of a nontoxic, biodegradable product as well as the reduction in health risks to workers associated with toxic cleaning products, this new product can have a considerable impact on the market as an environmentally friendly solution.     

水厂铝盐污泥为除磷填料的雨水径流污染控制技术

针对金泽水源地雨水径流磷污染控制需求,以及现有雨水处理技术中传统填料对溶解性磷的去除率有待进一步提高的问题,开发出以给水厂污泥为基材的除磷颗粒,并通过低浓度、短时间、少用量的盐酸浸泡改性强化了除磷效果.当使用改性除磷颗粒作为主体填料,构建雨水源头处理的生态滞留池或末端处理的滤池时,过滤装置具有表面水力负荷高、出水磷浓度...     

影响拟薄水铝石烘干系统产能的成因分析及其改进措施

本文针对拟薄水铝石生产线中的关键环节—烘干系统的设备产能问题进行了分析和技术改造,收到了较好的效果,并为同类生产企业及今后改、扩建工作提供了有益的借鉴。     

空气压缩除湿闭式干燥循环研究

通过对干燥过程的热力学分析 ,提出了一个采用空气为工质的闭式空气干燥循环 ,并分析了循环过程和工况参数变化对循环性能的影响。     

抛砖引玉谈干燥

详细论述了砖坯干燥室及焙烧窑预热带干燥的重要性,针对不同窑型还提出了相应的避免干燥裂纹的措施。     

仙人掌薄层热风干燥方法的实验研究

食用仙人掌“米邦塔”富含多种矿物质、蛋白质、纤维素和多种维生素，具有清热解毒、行气活血、促进新陈代谢、降血脂、降血压之功效，实为不可多得的功能性保健蔬菜，具有很高的经济价值。但由于仙人掌的含水量高，极难储藏。借鉴其他蔬菜脱水保藏的方法，利用热风干燥对仙人掌进行脱水处理，并以真空、冷冻及微波干燥为对比，通过测定脱水后仙人掌的一系列营养成分的含量变化比较这几种方法的优劣。     

梨枣的真空冻干工艺研究

采用真空冷冻干燥技术,探讨了护色、搁板温度、物料厚度等因素对梨枣冻干时间、品质的影响。结果表明,搁板温度每提高10℃,冻干时间缩短2.0h;厚度每增加2.0mm,冻干时间延长2.3h;研究确定梨枣真空冻干的最佳工艺参数为采用0.2%的Vc护色、搁板温度70℃、枣片厚度3.0mm。     

无机水合盐相变储热材料的过冷性研究

无机水合盐相变储能材料通常存在过冷现象,影响了该类材料所蓄热量的排放性能,如果过冷严重,储存的热量不能释放出来。就无机水合盐的过冷机理及非均匀形核的动力学机理进行了探讨,加入成核剂是降低过冷度的有效措施。     

淮河流域1960~2011年干湿时空变化特征

在分析淮河流域26个气象站1960～2011年降水变化的基础上,计算了流域年尺度和季尺度降水距平百分率和标准化降水指数（SPI）,并分析了淮河流域近52年干湿时空变化。结果表明,淮河流域年尺度降水距平与SPI较为一致,季尺度降水距平较SPI变化敏感;干旱多发生于春季,且2000年后发生频次减少;空间尺度上,流域中西部地区有变湿润趋势,东部沿海地区有变干旱趋势,变化趋势呈现近似纵向分带。     

“How do you know that I don’t understand?” A look at the future of intelligent tutoring systems

Many software systems would significantly improve performance if they could adapt to the emotional state of the user, for example if Intelligent Tutoring Systems (ITSs), ATM’s, ticketing machines could recognise when users were confused, frustrated or angry they could guide the user back to remedial help systems so improving the service. Many researchers now feel strongly that ITSs would be significantly enhanced if computers could adapt to the emotions of students. This idea has spawned the developing field of affective tutoring systems (ATSs): ATSs are ITSs that are able to adapt to the affective state of students. The term “affective tutoring system” can be traced back as far as Rosalind Picard’s book Affective Computing in 1997.This paper presents research leading to the development of Easy with Eve, an ATS for primary school mathematics. The system utilises a network of computer systems, mainly embedded devices to detect student emotion and other significant bio-signals. It will then adapt to students and displays emotion via a lifelike agent called Eve. Eve’s tutoring adaptations are guided by a case-based method for adapting to student states; this method uses data that was generated by an observational study of human tutors. This paper presents the observational study, the case-based method, the ATS itself and its implementation on a distributed computer systems for real-time performance, and finally the implications of the findings for Human Computer Interaction in general and e-learning in particular. Web-based applications of the technology developed in this research are discussed throughout the paper.