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Purpose: To eva luate quantitative cerebral blood flow (qCBF) with traditional time-based measurements or metrics of cerebral perfusion: time to peak (Tmax) and meantransit time (MTT) in stroke patients.Materials and Methods: Nine ischemic stroke patients (four male, five f..
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摘要 塑料制品制造业近年迅速成长。其中最受欢迎的制作过程是注塑塑料零件。注塑模具的设计对产品质量和效率的产品加工非常重要。模具公司想保持竞争优势,就必须缩短模具设计和制造的周期。 模具是工业的一个重要支持行业,在产品开发过程中作为一个重要产品设计师和制造商之间的联系。产品开发经历了从传统的串行..
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Abstract An efficient and accurate algorithm is developed to eva luate the reliability of a steel frame and reinforced concrete shear wall structural system subjected to static loading. In a companion paper, the algorithm is extended to consider dynamic loading, including seismic loading. The co..
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AbstractThis paper presents some empirical evidence on the psycho-social benefits people seem to derive from their cars based on in-depth interviews with a sample of car owners and non-car owners in the West of Scotland. We suggest that psycho-social benefits of protection, autonomy and prestige ..
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We have and the architects must deal with the spatial aspect of activity, physical, and symbolic needs in such a way that overall performance integrity is assured. Hence, he or she well wants to think of evolving a building environment as a total system of interacting and space forming subsystems..
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摘要:一个包括 1,996个职业工人的全国性的调查,在努力定量职业工人关于工程生产力的看法。调查定量了83个相对矛盾的生产力要素,这一调查结果被一系列讨论机构所认同和支持,这些机构中包括在美国各地的管理施工工地的职业工人们。调查结果显示职业工人们拥有一个好的有关生产要素的概念确实会影响到他们的日常生产,..
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摘要目前在工程建设项目行业中,以工程招投标为特征的建筑市场已经形成,施工企业为创造良好经济效益,必须严格控制成本,加强成本控制管理,才能提高市场适应能力和竞争力。本文从降低成本、增加收入两方面阐述对施工成本的有效控制。投标文件的编制是投标工作的一个重要环节,直接影响投标工作的成败,投标的成败对企..
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The widespread usage of electricity promoted to defend the development of thunder product and be a high pressure power grid to provide motive and illuminate for the thousand 10000, thunder and lightning also a great deal of bane high pressure lose to change to give or get an electric shock an equ..
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Materials and structural forms are combined to make up the various parts of a building, including the load-carrying frame, skin, floors, and partitions. The building also has mechanical and electrical systems, such as elevators, heating and cooling systems, and lighting systems. The superstructu..