mountain tobacco

the paper describes three determination methods of alpha activity ratio used at our laboratory, namely geometric progression method, extrapolation method and curve fitting method.

采用了3种α放射性比的测定方法：几何级数法、外推法和曲线拟合法。

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the resources of the internet are increasing in the speed of geometric progression. however, these information resources are connected to their own host machines.

Internet中的资源以几何级数的速度剧增，但是这些信息资源分布在各处的服务器上。

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According to principles of economy, the seepage control effectiveness of canals which is studied under static and dynamic conditions and with arithmetic and geometric progression of seepage control performance to time as well as with no change seepage control performance to time is studied.

依据经济学原理，对混凝土渠道在经济静态和动态条件下，防渗性能随运行时间呈等差衰减、等比衰减及不随运行时间衰减时的防渗效益进行了研究。

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as we all know, mankind's ability to create wealth had been promoted at the speed of geometric progression, due to the invention of steam engine and computer and the utilization of steels and improved varieties.

我们知道，曾经因为蒸汽机、计算机等生产工具出现，因为对工业钢材、农业良种等劳动对象的利用，人类社会生产财富的能力得到了几何级数的提高。

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secondly, an improved algorithm for finite difference equation is studied. according to the property of electromagnetic migration field, the algorithm is designed by means of grids varying with geometric progression in the longitudinal direction.

第二，研究了有限差分方程的改进算法，根据大地电磁场变化的特点，设计了纵向以等比级数变网格的迭代算法。

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the main difficulty is that the gradient vector for the cost function with respect to the design variables is hard to evaluate in the optimization method based on gradient algorithm, the costs of computation increase by geometric progression by the dimension of the design variables.

基于梯度优化方法的主要困难在于目标函数对设计变量的梯度矢量难以计算，计算量随设计变量的维数增大呈几何级数增大。

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calculation of consolidation coefficient with a geometric progression method

等比级数法推算固结系数

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On a Problem of Summing a Kind of Higher-Order Arithmetic-Geometric Progression

关于一种高阶算术几何级数的求和问题

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as the field of computer is larger and larger, the number of computer software is growing in geometric progression.

随着计算机的应用的领域越来越广泛，计算机的软件的数量也以几何级数在增长。

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the reproduction coefficient for the fast propagation with cut test-tube plantlets was 5 n, the reproduction speed increased at a geometric progression and large-scale seedlings could be multiplied in a short time.

脱毒试管苗切段快速增殖，繁殖系数为5n，繁殖速度以几何级数增长，一定时间内可大量繁殖脱毒苗。

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the geometric progression ratio of science and technology

科学技术的几何级数律

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with the advancement of our society and the development of science and research, knowledge has been in geometric progression growth.

随着人类社会的进步，科学文化事业的发展，人类的知识在按照等比级数增长着。

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the amount of information is increasing in a geometric progression in the 21st century.

21世纪，信息量以几何级数的飞快速度的向上增长。

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with the development of the storage and application technology of the database, enterprise data generated during operation is also to increase in geometric progression. this would require massive amounts of data to get to meet the specific needs of data to provide decision support for enterprise managers.

随着数据库数据存储和应用技术的发展，企业运行过程中产生的数据也在以几何级数增长，这就需要在海量数据中获得满足特定需要的数据，从而为企业管理者提供决策支持。

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The Construction Method of Multiplier Magic Square of Even Order Non-geometric Progression

一类偶阶非等比数列乘幻方构造法

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the geometric progression technique and three dimension arc length technique are combined to form a new method.

利用等比数列网格生成技术，三维弧长生成技术以及拼接技术生成计算网格。

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