共查询到19条相似文献,搜索用时 0 毫秒
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《中国高新技术企业评价》2016,(29)
在运用边界元方法计算开域场中的电场时,为提高传统一阶边界元法的精度问题,提出NURBS曲面四边形边界元法。此方法是对计算模型进行二阶四边形剖分,采用剖分信息构造出NURBS曲面参数方程,然后用面积比值法定义曲面上顶点的形状函数,曲面四边形的四个顶点作为求解点,计算NURBS曲面四边形单元上的积分值。 相似文献
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当前形势下,山区及高原地区基建项目的日益增多,为适应高山、深水以及地形起伏较大等复杂地形中临时栈桥施工,本文从钢栈桥的设计与施工两个角度分别进行分析研究,并通过实例进行了详细的阐述,分析总结了一套适应复杂地形地区栈桥设计及施工技术,指导后期类似项目的施工。 相似文献
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本文通过对泊松方程和波动方程有关知识的简单介绍,利用二维及三维波动方程的求解的过程,详尽地介绍并证明了泊松积分在波动方程中的应用。在介绍应用时,我们主要采用了一些比较典型的例题,理论联系实际地探讨泊松积分在波动方程中的应用。 相似文献
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积分是微积分中的重要内容,在经济学中应用广泛。文中通过具体事例研究了定积分在广告策略,消费者剩余和生产者剩余,国民收入分配及无穷积分在仓库供应的订货分析中的应用。 相似文献
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本文在零部件供应商参与产品设计的背景下,根据顾客需求权重的变化,利用QFD技术中的产品规划质量屋、部件配置质量屋及两者之间的关系,以客户满意度最大化为尺度,建立整数数学规划模型,求解各部件的变化情况,实现了从顾客需求变化到外包给供应商部件变化的转换,从而为供应商的动态选择提供依据,并给出了数值实例。 相似文献
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Kauffman GW 《Hospital materiel management quarterly》1993,15(2):22-31
In summary, the field of respiratory care has witnessed a continuum of accelerating change in its first half century of existence as a health care profession. These changes were effected by internal change agents as well as external forces in the health care arena. Based upon a health care system undergoing a near cataclysmic pace of change in a time of multifocal and critical inspection, it is anticipated that the field will undergo an even more dramatic change in its scope and direction in the next 50 years. With the guidance and assistance of administrators, medical staff, and partner departments, the respiratory care department should continue to function as an integral part of the hospital organization. 相似文献
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无论在各类施工现场或工业生产中,电动机都是不可或缺的重要设备,而其故障常常影响到整个生产施工的进行,甚至造成重大的安全事故。为了对故障电动机进行即时的保护和隔离,传统上采取的是以继电器为中心的保护系统,但它已无法适应现代工业生产的要求。而网络化的电动机故障诊断和保护系统可以更好地实现电动机故障的早期预测与保护。 相似文献
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The aim of this paper is to present under uncertainty, and in an ordinal framework, an axiomatic treatment of the Sugeno integral in terms of preferences which parallels some earlier derivations devoted to the Choquet integral. Some emphasis is given to the characterization of uncertainty aversion. 相似文献
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Estimation in the interval censoring model is considered. A class of smooth functionals is introduced, of which the mean is an example. The asymptotic information lower bound for such functionals can be represented as an inner product of two functions. In case 1, i.e. one observation time per unobservable event time, both functions can be given explicitly. We mainly consider case 2, with two observation times for each unobservable event time, in the situation that the observation times can not become arbitrarily close to each other. For case 2, one of the functions in the inner product can only be given implicitly as solution to a Fredholm integral equation. We study properties of this solution and, in a sequel to this paper, prove that the nonparametric maximum likelihood estimator of the functional asymptotically reaches the information lower bound. 相似文献
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利用二重积分的区域可加性,介绍了计算分段函数二重积分的一般方法,并将其运用于几种特殊分段函数二重积分的计算。 相似文献