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In the process of calculation, by comparison theorem and strict calculation, some sufficient conditions for persistent and extinct of three populations are obtained.

推导过程中主要应用了比较定理，并且通过严密的计算，得到了三种群持续生存性和绝灭性的充分条件。

Model of experiments was calculated by this Method and calculation results compared with Experiment results. Comparison shows upper-bound theorem of limit analysis is feasible, simple and accurate in calculation.

运用极限分析上限法对试验模型进行计算，并将计算结果与试验结果进行了对比分析，分析表明，利用极限分析上限法不仅简单可行，且具有较高的计算精度。

Methods Functional MR images were acquired in 18 healthy young subjects when they received simple calculation and complex calculation experiment.

计算是人类最基本的思维活动之一，有关计算任务时男女脑部的活动情况是否存在差异国内外报道较少。

Calculation of stress concentration calculation orifice complex variable function method.

详细说明：计算孔口应力集中的计算复变函数方法。

The article uses the great computus ability and control ability of AT91FR40162, and combines them with some of the merits of intellectual calculation, and thus realizes high-speed and real-time on-line interpolation, error compensation and complicated calculation in kinematics, makes movement control more accurate, faster and steadier. It also makes full use of superiority of Internet, reduces the number of system lines by Internet connection, raises the practical use of systems and reliability of information exchange.

这篇文章利用具有ARM核微处理器──AT91FR40162的强大运算能力和控制功能，结合智能算法的某些优点，实现高速实时在线插补、误差补偿和复杂的运动学计算，使得运动控制精度更高、速度更快、运动更加平稳，同时充分利用网络技术优势，通过网络连接方式减少系统的连线，提高系统的实用性和信息交互的可靠性。

In simulation calculation part, we applied graph theory to describing connection of component and node. We designed estimate arithmetic of shut loop with power, preferences arithmetic of simulation calculation.

在该单元中，采用图论的方法表述电路图中元器件和节点的连接关系，设计了有源闭合回路判定算法和仿真计算参数生成算法。

In calculation, the discretization of continuity equation is performed in accordance with semi-implicit Scharfetter-Gummel scheme and the electric field is solved by the current conservation instead of the Poisson's equation, so it saves plenty of time for calculation.

在计算中，对于粒子的连续性方程我们采用Scharferter和Gummel提出的有限差分方法，并用电流守恒方程代替泊松方程来求解电场，从而节省了大量的计算时间。

Consequently ,the paper makes out experimental investigation and numeric calculation for phenomenon of water hammer, and deeply proves that the continuity equation for water hammer calculation is false by comparing and analyzing them.

接着，进行了水击现象的试验研究和数值计算，并将二者进行了比较分析，进一步证明前面分析的结论，水击计算的连续性方程确实是错误的。

In our work, a new continuous thermodynamics method for petroleum fraction phase equilibrium calculation has been proposed, in which true boiling point distillation curves for petroleum fractions were considered to be a continuous distribution function and the distribution variable was TBP temperature, and at the same time, a spline method was used in the distribution function calculation.

在以上工作的基础上，建立了具有普遍实用性的常压塔精馏计算的数学模型，并对多个工业装置进行了实际的模拟，模拟结果与装置的实际情况符合良好，在预测塔的抽出温度，抽出产品的性质，以及各个侧线产品收率等方面都得到满意的结果。

And the keytechniques are in the following:(1) The algorithm and program of intensified node arrangement near crack tip andalong crack line (2) The shape function calculation of point near crack based on visibility criteria (3) The contour integral method for calculation of stress intensify factor K_ⅠK_Ⅱ(4) The rock slope appraisal method using circular method, polygonal method orgraph theory method depending on the slope joints combination

程序实现的关键技术和算法如下：(1)沿裂隙结点布置及裂尖结点加密的算法及程序(2)采用可视准则的形函数算计算程序(3)围线积分计算复合型裂纹裂尖强度因子K_Ⅰ、K_Ⅱ的算法及程序(4)圆弧搜索法、折线搜索法和无网格—图论搜索法的算法及程序

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。