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关于师范院校有机化学教学过程中几点体会浅谈
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作者 罗琴琴 孙玉林 《广东化工》 CAS 2019年第18期182-185,共4页
结合作者在岭南师范学院有机化学的教学实践,对有机化合物系统命名法及书写规范、构象透视式与费歇尔投影式的相互转化和部分有机物的合成等几个方面的问题作了一些探讨,总结出一点教学体会,在课堂教学过程中取得了较好的教学效果,同时... 结合作者在岭南师范学院有机化学的教学实践,对有机化合物系统命名法及书写规范、构象透视式与费歇尔投影式的相互转化和部分有机物的合成等几个方面的问题作了一些探讨,总结出一点教学体会,在课堂教学过程中取得了较好的教学效果,同时也希望能为研究生入学考试的同学提供帮助。 展开更多
关键词 有机化学 系统命法 构象透视式 费歇尔投影式 合成
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Methodological Proposition of an Integrated System for Urban Floods Control
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作者 Priscila Dionara Krambeck Braun Carlos Loch 《Journal of Environmental Science and Engineering(B)》 2012年第8期971-981,共11页
In the State of Santa Catarina, Brazil, especially in the Itajai valley, there are records of accidents and disasters mainly associated to landslides and floods, which have caused significant damages and losses, inclu... In the State of Santa Catarina, Brazil, especially in the Itajai valley, there are records of accidents and disasters mainly associated to landslides and floods, which have caused significant damages and losses, including human lives. In order to make the coexistence with such natural disasters possible, most particularly with floods, a integration is required among the technical, political, environmental, and human knowledge. Measures that encompass integrated actions for the entire river basin, with the help from an updated technical cadastre and tools, such as the GIS, allow the development of planning tools that might effectively help the people to live with the water, or else to cope with floods in a more appropriate manner. This paper attempts to propose a methodology for urban flood control, based on the integration among the several public entities involved in the flood control, along with the CTM (Multipurpose Technical Cadastre) and GIS tool. In order to solve or minimize the problems, the model proposed here aims at promoting a balance between the agents involved, and enables to rank the degrees of importance assigned to the different needs, thus allowing to eliminate or to improve those areas and processes that are duplicated or superimposed. 展开更多
关键词 Flood control urban floods methodological proposition.
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Evaluation of Methodology for Life Cycle Assessment Applied to Hydroponic Tomato Processes from a System Approach
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作者 Nadia Lara Ruiz Martha Lilia Dominguez Patino +2 位作者 Oscar Gabriel Villegas Torres Luz Elva Marin Vaca Miguel Aguilar Cortes 《Journal of Agricultural Science and Technology(B)》 2014年第10期811-815,共5页
Analysis of agricultural production systems of hydroponic tomato in Morelos state of Mexico, through a systematic approach, called systems development of life cycle (SDLC) was performed by comparing this with the me... Analysis of agricultural production systems of hydroponic tomato in Morelos state of Mexico, through a systematic approach, called systems development of life cycle (SDLC) was performed by comparing this with the methodology known as life cycle assessment (LCA). This permits to analyze the differences in approaches of all these methodologies to propose improvements in the current system, which can allow an improved assessment of the environmental quality of agricultural products, which often is subject to confusion. That due to measurement parameters are not generally accepted by society, producers and consumers, may ensure that the process is fully sustainable and is considered quite as a green technology processes towards an ecological benefit and therefore for the humanity. 展开更多
关键词 Analysis HYDROPONIC LCA SDLC.
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Planning of Anti-Disaster Transformer Substation Based on NN and PSO
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作者 Tao Wang Xiaolei Yang +2 位作者 Qijun Tang Jia Li Xuandong Liu 《Journal of Energy and Power Engineering》 2013年第10期1992-1997,共6页
Recently, the frequent extreme natural disasters made enormous damage to the electric grid leading to blackouts. The lifeline system aiming at providing continuous power supply for the important load in extreme natura... Recently, the frequent extreme natural disasters made enormous damage to the electric grid leading to blackouts. The lifeline system aiming at providing continuous power supply for the important load in extreme natural disasters was designed in that condition. In this paper, a developed model for planning of the transformer substation in lifeline system which considered the effect of existing transformer substations, the motivated areas and punishment areas was proposed. The Hopfield NN (neural network) was adopted to solve the feeders and the PSO (particle swarm optimization) was adopted to new the locations of the transformer substations based on the feeders. The planning result not only took fully use of the existing substation but also got the suitable location for new construction which was satisfactory. 展开更多
关键词 Lifeline system transformer substation Hopfield NN PSO.
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