查询词典 calculation

An adaptive grid scheme controlling cell area is used to generated grids in the divergent section of symmetric annular nozzle, and the generated grids are used in the flowfield calculation through the uncoupled way. The elliptic equations are used to generate grids in three dimensional regions of FDN divergent section, the source terms used in the equations employ a mathematical form which is independent of the boundary shape and of the boundary grid point distribution, the free parameters contained in the source terms are determined by the two restraint conditions, the intersection angle of transverse grid lines with boundaries and the local curvature of the transverse grid lines at the boundaries, and the interior grid distribution controlled directly by the grid point distribution assigned on the boundaries is realized, it makes the grid more clustering near the nozzle wall. For the generated grids in the whole computational regions have a good smoothness and orthogonality, the accuracy of calculation in the flowfield is ensured.

对轴对称的环形喷管采用控制网格面积的自适应网格方法对扩散段部分进行了网格生成，并通过非耦合方式应用于喷管的流场计算中；对强制偏流喷管扩散段内的三维区域采用椭圆型方程进行网格生成，方程中的源项采用了与边界形状和边界网格点分布无关的数学形式，源项内的自由参数由横向网格线与边界的交角及横向网格线在边界处的局部曲率两个约束条件来确定，实现了由边界上的网格分布直接控制内部的网格点，使壁面附近具有较密集的网格，并且在整个计算区域内的网格都具有良好的光滑性和正交性，从而保证了流场计算的准确性。

Described the design of supercritical fluid extraction principles; combination of star anise essential oil of the nature of the proposed extraction conditions for extracting pressure 15MPa, extraction temperature 40 ℃, CO2 flow rate 830 ~ 850L / h, extraction time of 2h, the extraction conditions selected temperature swing separation, further development of the star anise crushed, CO2 super-critical phase transition, extraction, separation and packaging processes; in determining the production process on the basis of material balance, heat balance, extractor size calculation, piping calculation and packaging process is calculated; for the pollution occurred during the production, analysis of pollution sources, pollution control and waste treatment proposed measures; accounting of production costs and value.

本设计阐述了超临界流体萃取技术的原理；结合八角精油的性质，提出萃取条件为萃取压力15MPa，萃取温度40℃，CO2流量830～850L/h，萃取时间2h，根据萃取条件选用变温变压的分离方式，进一步制定了八角粉碎、CO2超临界相变、萃取、分离和包装等工序；在确定的生产工艺流程的基础上进行物料衡算、热量衡算、萃取釜尺寸计算、管路计算和包装工序计算；针对生产过程中出现的污染，分析污染的来源，提出控制污染和废料处理的措施；核算生产的成本和价值。

Methods The optical calculation was taken as the following by using the parameter of Gullstrand model eye:①The refraction of silicone filled eye in non-accommodative status;②The refraction of silicone filled eye in non-accommodative status;③The aniseikonia analysis when one eye filled with the silicone oil;④The IOL power re-calculation.

采用Gullstrand模型眼参数进行以下分析：①非调节状态下正常眼球与硅油填充后眼球的屈光状态；②调节状态下正常眼球与硅油填充后眼球的屈光状态；③无晶状体眼玻璃体腔填充后的屈光状态；④正常眼球与填充硅油后视网膜像放大率变化；⑤硅油填充后的白内障人工晶状体植入术人工晶状体度数的变化。

Many methods on calculation of deflection of prestressed concrete beams have been proposed both at home and abroad, most of which were empirical formulas for approximate engineering calculation.

有关预应力混凝土梁的挠度计算，国内外学者提出了不少计算方法，但几乎都是以满足工程要求为前提的近似经验公式。

Secondly,in order to resolve the problems such as great calculation account and memory space of three-dimensional tomography,we study an approximate calculation method of three-dimensional Fresnel volume.

此外，通过模型实验，分析了频率对菲涅耳体层析反演收敛速度和成像结果等的影响，提出了用于菲涅耳体层析成像的一种变频方法。

Through numerical calculation and comparison with the complete formula,the accuracy of the approximate formula for calculation of reflection coefficient often used in AVA method for gas hydrate is discussed.

通过与完整公式的对比，对AVA常用的反射系数近似计算式的精度进行了讨论，同时分析了地震波速度、泊松比、密度等参数对于BSR反射系数的不同贡献。

Advanced Features: Add, Subtract, Multiply, and Divide Save and Recall Memory functions Full degrees, radians, or grads calculation Percentage calculation and conversion Square Root, Sine, Cosine, Tangent Arc Sine, Arc Cosine, Arc Tangent

高级功能：添加，减，乘，除以储存和回收记忆功能全度，弧度，或毕业生计算百分比计算和转换平方根，正弦，余弦，正切圆弧正弦，余弦弧，弧切线

A new Weibull Stress arithmetic in which Gaussian point is as a calculation unit is proposed. It can get more accurate result than the arithmetic in which Element is as a calculation unit.

1本文提出了以高斯点为单位计算韦布尔应力的新算法，在相同的有限元网格划分情况下，该算法比目前国际上通用的以单元为单位计算韦布尔应力的算法计算精度更高。

The calculation results show that the formulas are accurate and reliable and applicable for concrete atrium reinforcement calculation.

计算结果表明：本文公式的计算结果是准确可靠的，适用于混凝土围套加固的计算。

With the interface software, the basic data from GIS system and the running data from automatic computation system or from SCADA system can be conveniently formated to the standard database needed by the loss calculation software. According to the data, many flexible measures are taken to avoid the manual data input process and make the calculation result closer to the real value.

该软件通过对GIS系统、计量自动化系统和SCADA系统中各类数据结构的详细分析，制定了数据交互规则，并针对相关数据库的实际情况实现了若干灵活处理，既避免了手工录入数据的繁琐过程，又使线损计算结果能够适应运行需求。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。