This paper has proved that a plane curve c is a circle if and only if c is the locus of a moving point that has a constant second power average of distances from n fixed points.
证明了平面上一条曲线是圆的充要条件是此曲线为到n个定点的距离的二次幂平均等于正常数的点的轨迹。
This method ascertains the enterprise quota ultimately by steps such as judging system error,eliminating bulky error,checking that whether the quantity of valid data is up to the request or not,using the way of the second average,so can avoid the fault because of the data distortion.
该方法通过判断系统误差、剔除粗大误差、检验有效数据数量是否要求、利用二次平均法等步骤最终确定企业定额,从而避免由于数据失真造成的企业定额编制失误。
Based on the geochemical data of the long regional profile in western Jiangxi and using quadratic arithmetic average and correlation analysis,orebearing features of strata are discussed in this paper.
本文以赣西地区区域长剖面的地球化学测量数据为基础，运用二次算术平均及相关分析方法，探讨了地层含矿性。
The twice rigidity average method will be a better and practical ones.
本文提出了确定内燃机配气机构刚度的三种数据处理方法，并对处理结果作出了分析、比较，确认二次刚度平均法是一种较好的实用方法。
Locus of Point with Constant Second Power Averageof Distances from n fixed Points;
到n个定点距离的二次幂平均为定值的点的轨迹
the second, third, fourth, etc power of x x
的二次、 三次、 四次等幂
the second,third,fourth,etc power of x(x2,x3,x4,etc)
x的二次、三次、四次等幂（x2,x3,x4等）
One of a quadrillion equal parts.
百万的四次幂的均等部分之一
On the 1/2 power mean value of reciprocal cubic complements;
关于立方幂补数倒数的1／2次均值
The Integral Part of Powers of Real Quadratic Algebraic Integers;
一类实二次代数整数方幂的整数部分
Consisting of terms of the same degree or elements of the same dimension.
齐性，均匀含有相同次幂的项或相同量的元素的
The solution of the interlace series type linear even differential equation of contain negative twice power function and arrangement number;
负二次幂交错级数型线性齐次微分方程
On the Monotony of Functions Generated by the Power-mean Inequality;
关于一般幂平均不等式的构成函数的单调性
Research on power index model of average brake torque for drum brake;
鼓式制动器平均力矩的幂指数模型研究
Monotonicity of Some α-Power Mean Functions under the Order Defined by A~4≥(A~2B~2A~2)~(2/3)
在序A~4≥(A~2B~2A~2)~(2/3)下的α幂平均函数的单调性
The average don gives one or two lectures a week, on a subject which is his special field of interest.
平均每个教师就自己的专长一星期讲课一、二次。
At most seaside places there are two tides a day, the average time interval between two successive high waters being twelve hours and twenty-five minutes.
大多数海滨每天均有两次潮汐，两次高潮间的平均间隔为十二小时二十五分钟。
the fourth power of x x
的四次幂(X+[4])
The relations among energy exponent,incident energy and real efficient secondary electron emission coefficient at higher incident electron energy
较高能有效真二次电子发射系数与入射能量、能量幂次的关系
Relation among energy exponent,incident energy and secondary electron emission coefficient of metal at high incident electron energy
金属的高能二次电子发射系数与入射能量和能量幂次的关系
2. Average wage level in the country;
（二）社会平均工资水平；
Quasimonotone Function for Constructing Inequality and Problems of Linear Inequalities Involving Power Means
建立不等式的拟单调函数方法与涉及幂平均的线性不等式问题