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Study on Rice Water Requirement of Liangping County under Climate Change Background
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作者 Gao Fei Qi Junsheng +2 位作者 Wang Qinqin Zhang Ting Mou Xinli 《Meteorological and Environmental Research》 CAS 2014年第9期57-59,共3页
Under global climate change background,using daily meteorological data at Liangping ground meteorological station during 1961- 2012,we calculated crop water requirement and net irrigation water requirement during rice... Under global climate change background,using daily meteorological data at Liangping ground meteorological station during 1961- 2012,we calculated crop water requirement and net irrigation water requirement during rice growth period in Liangping County,and analyzed its climate tendency rate. Results showed that climate tendency rate of crop water requirement during growth period of rice was only- 0. 007 mm /10 a; climate tendency rate of rainfall was- 0. 06 mm /10 a,but interannual change was relatively larger; climate tendency rate of net irrigation water requirement was 0. 011 mm /10 a. In the years when drought occurred,such as 2006 and 2011,both rice water requirement and net irrigation water requirement in Liangping were greatly higher than means over the years. Therefore,we should focus on drought pre-warning and risk management improving drought disaster prevention in Liangping in the future. 展开更多
关键词 Liangping County Rice Crop water requirement Net irrigation water requirement Climate change China
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Managing Software Requirements Changes Based on Negotiation-Style Revision 被引量:2
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作者 牟克典 Weiru Liu +2 位作者 金芝 Jun Hong David Bell 《Journal of Computer Science & Technology》 SCIE EI CSCD 2011年第5期890-907,共18页
For any proposed software project,when the software requirements specification has been established,requirements changes may result in not only a modification of the requirements specification but also a series of mod... For any proposed software project,when the software requirements specification has been established,requirements changes may result in not only a modification of the requirements specification but also a series of modifications of all existing artifacts during the development.Then it is necessary to provide effective and flexible requirements changes management.In this paper,we present an approach to managing requirements changes based on Booth's negotiation-style framework for belief revision.Informally,we consider the current requirements specification as a belief set about the systemto-be.The request of requirements change is viewed as new information about the same system-to-be.Then the process of executing the requirements change is a process of revising beliefs about the system-to-be.We design a family of belief negotiation models appropriate for different processes of requirements revision,including the setting of the request of requirements change being fully accepted,the setting of the current requirements specification being fully preserved,and that of the current specification and the request of requirements change reaching a compromise.In particular,the prioritization of requirements plays an important role in reaching an agreement in each belief negotiation model designed in this paper. 展开更多
关键词 requirements change non-prioritized belief revision inconsistency handling NEGOTIATION
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Semantic-driven method for designing 3D busbars
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作者 Shi Kanle Zhu Zixu +2 位作者 Wu Zijian Zhang Hui Yong Junhai 《Computer Aided Drafting,Design and Manufacturing》 2017年第2期16-23,共8页
Traditional busbar design is inefficient, costly, and error-prone because of frequent changes of requirements. This paper proposes a semantic-driven method for designing 3D busbars to solve this problem. The design pr... Traditional busbar design is inefficient, costly, and error-prone because of frequent changes of requirements. This paper proposes a semantic-driven method for designing 3D busbars to solve this problem. The design process contains two main parts, namely, semantic-driven routing design and automatic routing segmentation. Semantic-driven routing design creates a relation table between electrical semantics and 3D modeling parameters, as well as helps designers create routings efficiently using electrical parameters as input. Automatic routing segmentation can convert routings into busbar segments that also include manufacturing information. Because the design operations are associated with one another, the resulting busbars can automatically be changed in real time when requirements are changed. 展开更多
关键词 semantic-driven design busbar design busbar segmentation modeling change of requirement
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