关键词： 内燃机   水蒸气   压力  

摘要： 作者依据大气物理学方面的资料给出不同温度下饱和水蒸气压的实际值拟定出了一条经验公式。根据这条经验公式和大气物理学的基本定律可以直接计算出任意大气条件下空气中水蒸气的分压φP_(SW)值。其精确度不低于0.06％。

关键词： 房地产   价格   模糊数学  

摘要： 本文首次提出房地产价格模糊数学模型,建立一套计算公式,开创了房地产价格评估的一条新途径。

关键词： 计算方法  

关键词： COST ALLOCATIONS  

摘要： This paper investigates the mathematical programming (MP) approach for decision making and cost allocation in the context of joint products. Through analysis of the MP approach to marginal-value-based cost allocations, an algorithm is developed to show that the allocations contain two elements: an element that is specific to individual joint products due to differences in demand elasticities, and an element based on relative adjusted sales values. If demand elasticities are identical for all joint products, then the traditional sales value method will generate the same cost allocation as the MP method. The new algorithm, the demand-adjusted-sales-value algorithm (DASV), is especially helpful for solving the MP model with linear demand functions. The DASV algorithm provides an easy way to generate costs that are useful for optimal decision making.

关键词： 双重介质   油田   数值模拟  

摘要： 本文对双重介质三维三相热水驱油的数学模型进行了数学处理。为便于数值分析、提出了相应的泛函,构造了算法,并进行了模拟计算,收到了良好的效果。

关键词： 离散点列   程序设计   曲线   CAD   CAM  

关键词： Algorithms  

摘要： This paper describes a model implementation and test software for the Sparse Basic Linear Algebra Subprograms (Sparse BLAS). The Sparse BLAS perform vector operations common in sparse linear algebra, with the goal of providing efficient, but portable, implementations of algorithms for high-performance computers. The model implementation provides a portable set of FORTRAN 77 Sparse BLAS for use on machines where specially tuned implementations do not exist or are not required. The test software is designed to verify that tuned implementations meet the specifications of the Sparse BLAS and that implementations are correctly installed.

关键词： 插件箱   温度场   数学模型   电子设备  

摘要： 本文以插件箱为物理模型,介绍一种描述稳定状态下温度场分布的三维网状数学模型,并就模型的实现进行讨论。