查询词典 summation formula

The finite summation of real Fourier series approximation of a time pusle.

时间脉冲的实部傅立叶级数接近的有限和。

It has become one of the important tasks in the study on modern electric system. At first, this text has briefly introduced meanings, the current development and the main methods which the electric load forecasting are used. This paper aimed at the floatability which the load data had and the nature that neural networks model is easy to fall into part infinitesimal value and low iterative speed, this paper proposed a method based on neural networks and SVM. SVM can dispel the less summation and the larger single point errors of neural networks, and the neural networks could dispel the simplification of the model of the vector support machine.

本文首先介绍了电力系统负荷预测的意义、发展现状和主要方法；针对负荷数据具有浮动的特点以及神经网络模型算法容易陷入局部极小和迭代速度较慢的缺点，提出了一种基于神经网络和支持向量机的混合负荷预测方法，此方法能通过支持向量机消除神经网络的总和较小但单点误差较大的不利现象，而神经网络消除了支持向量机的模型简单问题。

Aapproximation of Fourier inverse integral using Fourier transform approximation for amplitude of harmonics in a finite Fourier series summation.

富氏级数中之谐波成份以富氏转换近似并以有限级数和近似富氏逆转换。

Philosophy is the generalization and summation of the knowledge of nature and society.

哲学是关于自然知识和社会知识的概括和总结。

Average annual Growth Rate Two methods for calculating average annual growth rate are applied in China, one is often called "level approach" or the method of calculating geometric average, which is derived by comparing the level of the last year of the interval with that of the beginning year; the other is called accumulative approach or algebraic average or equation method, which is derived by the summation of the actual figure of each year in the interval divided by the figure in the base year.

平均增长速度我国计算平均增长速度有两种方法：一种是习惯上经常使用的"水平法"，又称几何平均法，是以间隔期最后一年的水平同基期水平对比来计算平均每年增长速度：另一种是"累计法"，又称代表平均法或方程法，是以间隔期内各年水平的总和同基期水平对比来计算平均每年增长速度。

Annual Average Growth Rate two methods for calculating annual average growth rate are applied in China, one is often called "level approach" or the method of calculating geometric average, which is derived by comparing the level of the last year of the interval with that of the beginning year; the other is called "accumulative approach" or algebraic average or equation method, which is derived by the summation of the actual figure of each year in the interval divided by the figure in the base year.

平均增长速度我国计算平均增长速度有两种方法：一种是习惯上经常使用的"水平法"，又称几何平均法，是以间隔期最后一年的水平同基期水平对比来计算平均每年增长速度；另一种是"累计法"，又称代数平均法或方程法，是以间隔期内各年水平的总和同基期水平对比来计算平均每年增长速度。

Tow methods for calculating average annual growth rate are applied in China, one is often called "level approach" or the method of calculating geometric average, which is derived by comparing the level of the last year of the interval withthat of the beginning year; the other is called "accumulative approach" or algebraic average or equation method, which is derived by the summation of the actual figure of each year in the interval divided by the figure in the base year.

我国计算平均增长速度有两种方法：一种是习惯上经常使用的"水平法"，又称几何平均法，是以间隔期最后一年的水平同基期水平对比来计算平均每年增长速度；另一种是"累计法"，又称代数平均法或方程法，是以间隔期内各年水平的总和同基期水平对比来计算平均每年增长速度。

By illustrating "the graphical solution to linearity programming problems of two fluent" and " geometric sequence summation", the author demonstrates the mathematics application in manufacturing enterprises and daily life and the importance and necessity to reinforce it.

文章通过"两个变量线性规划问题的图解法"和"等比数列求和"的两个实例，说明数学在生产企业、日常生活中的应用，阐明了加强数学应用教学的重要性和必要性。

City underlying surface includes water area、holt、grassplot、hard ground、farmland and bare ground in the city, which is the summation of city land using.

城市下垫面包括城市范围内的水域、林地、草地、硬地面、农田和裸地，是城市土地利用的总和。

In Entrance Test of Higher Algebra of Zhangzhou Terachers Colleage for MA/MS Candidates in 2004,there is a question on inequality,which is determined by the summation of all positive eigenvalues of real symmetric matrix and its trace.

2004年漳州师范学院硕士研究生入学考试中有一道高等代数试题，是关于实对称阵的所有正特征根之和与其迹所确定的不等式。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。