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电力市场下AGC辅助服务计价方法的研究 被引量:1
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作者 郭华 郑文彬 《中国高新技术企业》 2011年第34期125-128,共4页
根据电力市场的发展趋势,发电机组提供的辅助服务将由无偿变成有偿。文章针对广西电网发电机组提供调频辅助服务的现状,介绍了一次调频服务的计价方法,着重在可计成本和备用容量两个方面分析了AGC发电机组二次调频服务的计价方法,并借... 根据电力市场的发展趋势,发电机组提供的辅助服务将由无偿变成有偿。文章针对广西电网发电机组提供调频辅助服务的现状,介绍了一次调频服务的计价方法,着重在可计成本和备用容量两个方面分析了AGC发电机组二次调频服务的计价方法,并借鉴新英格兰电力市场的模式展望了AGC辅助服务计价的运用。 展开更多
关键词 自动发电控制 调频服务 可计成本 备用容量 AGC辅助服务
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The Challenges of Designing a Wooden Beam of Composed Section
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作者 Aiexandre de Macedo Wahrhaftig Ricardo Femandes Carvalho 《Journal of Civil Engineering and Architecture》 2016年第4期430-438,共9页
This work describes details about the challenges and solutions encountered in the timber structure beam. The choice for wood is due to the fact that it is a better material suited for environments with high salinity a... This work describes details about the challenges and solutions encountered in the timber structure beam. The choice for wood is due to the fact that it is a better material suited for environments with high salinity and, in this context, to reduce maintenance costs. The entire roof was supported only by four columns, which forced the side and frontal beams to exceed spans over 18 meters without intermediate supports. This was the most important challenge of the project: to find a section to the beam which can attend the ultimate limit state and serviceability in wood to the dimensions in project. The answer was clear: It would need to have composed section. A computational model was constructed using the finite element method in order to obtain the efforts on the structural elements. It is important to emphasize that the design of a wood structure requires not only knowledge, but creativity as well, to overcome the challenges posed by the distinctive needs to the detailing of this material. In addition to that, it requires special attention during the construction execution, because of the difficulty that the carpenters have to read the specific plans. 展开更多
关键词 Composed section wooden structures design finite element method conditions of execution.
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Research on Furniture Design Methods Based on Sustainable Design Theory
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作者 Yuan Yuan Wu Xuejuan 《International Journal of Technology Management》 2014年第4期95-97,共3页
Environmental awareness is going deeply into the hearts of people in nowadays. Interior environment design of buildings is one of the manifestations of life quality, and furniture is one of the important elements comp... Environmental awareness is going deeply into the hearts of people in nowadays. Interior environment design of buildings is one of the manifestations of life quality, and furniture is one of the important elements composing interior design. In order to realize using the lowest cost to enjoy the best home life, the paper discusses sustainable design methods from different perspectives, and uses science and technology to integrate art, culture and nature. For the development status of furniture market, the paper researches how to solve the problems faced by furniture market by sustainable design, for achieving continuable, recycle and recoverable objective to control cost and enrich home life of consumer. 展开更多
关键词 furniture design sustainable design recycled recoverable RECYCLABLE
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