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.

1、

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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2、

Property of based on HPA nonlinear distortion arithmetic of Volterra progression

放大器非线性失真的Volterra级数算法研究

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3、

We asked them to learn the concept and the formula of general term of arithmetic progression under a teacher instruction or self-learning. After learning, they were asked to finish a test of far-transfer problems and near-transfer problems.

要求他们在教师指导或自学完成学习等差数列概念和通项公式。

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4、

In this paper, it is proved that there is an infinite arithmetic progression of positive even numbers each of which is prime to 3, and has no representation of the form p+ 3~ k.

证明了如下定理：存在一个正偶整数的无穷算术数列，其中每一项都与3互素且不能表为p+3k形式。

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5、

Some special patterns of annuity changes whose payments are of the arithmetic progression of higher order or of the reverse rainbow are studied, and their beginning values and ending values are given.

并研究了付款额呈高阶等差数列及倒虹式年金等某些特殊的年金变化形式，给出了其期初值和期末值。

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6、

Gauss might have given the answer to this as if it were an arithmetic progression, not having noticed that the 9th term was 112 instead of 111.

高斯也许会把这当成等差数列，并运用他的技巧，但他却没有注意到，第9个数是112而不是111。

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7、

It is questioned that thickness curves of concrete structures having uneven surface are directly derived without migrate, and depth is taken directly from ordinate in arithmetic progression.

常见的不作偏移，即对其背后岩石凹凸不平的混凝土结构物作厚度曲线，或在时间剖面上用等差级数的深度纵坐标，有基本概念的问题。

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8、

The formula of finite summation of K Steps arithmetic progression is seeked out by using the summation function of power series.

用幂级数和函数的思想来给出阶等差数列求有限和的公式。

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9、

The record difference was 0.1 with the increase of every line of the sight mark, it showed arithmetic progression arrangement.

视力记录视标每增加1行，记录相差0.1，呈算术等差级数排列。

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10、

Integer which represented as the product of k prime numbers in arithmetic progression was studied and two important results are obtained.

研究表整数为算术数列中k个素数的乘积，得到两个重要结果。

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11、

( math) a progression of terms whose reciprocals form an arithmetic progression.

（数学）其倒数构成一个等差级数的级数术语。

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12、

The result shows that the utility of the arithmetic progression can limit the first kind of misread.

结果表明，等差数列的利用可规范第一种误读。

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13、

The Enshrouded Difference of Arithmetic Progression with n Order

n阶等差数列的隐蔽公差

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14、

On the integer represented as the product of k prime numbers in arithmetic progression

关于表整数为算术数列中k个素数的乘积

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15、

The Number of Primes in a Class of Arithmetic Progression

一类特殊等差数列中的素数个数问题

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16、

1-4-7-10-13-is the start of an arithmetic progression.

1-4-7-10-13是一个等差级数的开始部分。

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17、

Exponential Sums over Primes in an Arithmetic Progression

算术级数中的指数和估计

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18、

Objective To observe effect of preventing relapse of interferon ointment for condyloma acuminatum ( CA ) .

目的观察干扰素软膏在预防尖锐湿疣复发中的作用.

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19、

Chapter 2 mainly deals with the new synchronization arithmetic using the auxiliary sequence in DS/ SS, and estimates the temporal performance with the Markov theory. Then it provides the simulating figure as the consequence.

第二章主要研究了DS/SS系统的引入了辅助序列的同步新算法，并运用马尔可夫链对新算法的时间性能进行了估计，最后给出了新算法的仿真分析结果。

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20、

The analysis and calculation on system frequency changing, oscillating and symmetrical fault offers reference for choosing arithmetic of digital negative sequence unbalance output in relay protection.

分析计算这2种方法在系统频率变化和振荡以及三相故障时的负序不平衡输出，为数字式负序滤过器的算法选择和继电保护中负序不平衡量的定值整定提供依据。

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