查询词典 forward difference

Continuity equation and motion equation which can be applied to cone-shaped pipes are obtained and finite difference method for them is brought forward.

根据非稳定流的一维流动理论，对圆锥形管道中的瞬变流动进行了分析，推导出了适用于圆锥形管道的连续性微分方程和运动微分方程，给出了这两个方程的有限差分解法，同时对计算结果进行了相对误差的对比分析。

Aimed at the difference in the definition of fuze in mang years,a viewpoint war put forward that the definition of fuzes should in dude the main functions of fuze . and the in formation sources used by fuze during working,and corer all kinds of fuze.

针对多年来对引信定义方式出现的不同和差异，提出了引信定义应该包含引信的主要功能，引信工作利用的信息来源，并且涵盖所有引信的观点。

In this paper, I establish a set of updating the basic land-use map technology and flow after I go deep into studying the methods of updating the basic land-use map based on 3S technology. It is very important point that I bring forward some methods of change information automatic detected founding on land-use map unit, cross correlation analysis with multispectral image and object-oriented classification aiming at difference data and difficult identifying change information problems.

本文在深入研究了基于3S技术更新土地利用图件的方法基础上，从实用化的角度出发，建立了一套利用3S技术更新土地利用基础图件的技术流程与方法，并针对不同的数据情况和变化信息自动提取等问题提出了基于土地利用图斑单元的知识库变化信息自动发现方法、多波段遥感影像交叉相关分析变化识别方法及面向对象的遥感影像分类变化检测方法。

In recent years, with the development of modern science and technology, people have put forward a great many new neutral difference equations in natural science and social science as biology, economics, demology, physics and control theory, etc.

近年来，随着科学技术的发展，在自然科学与社会科学的许多学科中，如生物学、经济学、人口学、物理学以及控制论等，人们不断提出大量新的中立型差分方程。

Both finite element method and discrete operator difference method can be pushed forward from which.

由该方程不仅可以得到有限元法，还可得到离散算子差分法。

Based on the quotient of difference being the grey derivative's whitening values in the GM(1,1) direct modeling method, direct modeling method of GM(1,1) with a step by step optimum grey derivative's whiting values is put forward.

在 GM(1，1)直接建模法以差商作为灰导数白化值的基础上，提出了一种逐步优化灰导数白化值的方法。

In the epilogue part, the author summarizes the whole article and concludes the violence phenomena in the three main media Then tell us their sameness and difference, the value and disvalue, and complex relationship between the violence and aesthetic perception. In the end, sum up the violence phenomena objectively and look forward to a good future.

结语部分，收束全文，总结了当代文学作品、影视作品和电子游戏三种文化形态中的暴力现象的相同性与差异性，正面价值与负面价值，及其与人们审美意识的复杂关系，并对这三种形态中的暴力现象进行了审理，展望了其发展前景。

In Chapter Three we mainly discuss equivalent comparative sentence, put forward a simple scheme of equivalent comparative sentence production, and explore the semantic difference and transformation possibility of the equivalent comparative sentence.

第三章我们主要讨论了等同比较句，提出了一个生成等同比较句的简易方案，并且对各种等同比较句式之间的语义差别以及变换的可能性进行了探讨。

To further understand and correctly master the notion of marginal spectrum in Hibert-huang transform, the linear property of marginal spectrum is demonstrated, an mistake to the notion of marginal spectrum in some documents is pointed out, and a new viewpoint about the essential difference between marginal spectrum and Fourier frequency spectrum is put forward by which the amplitude of Fourier frequency spectrum only represents the probability that a frequency objectively exists in a signal while the amplitude of marginal spectrum decides whether a frequency objectively exists in a signal.

为了深入理解和正确掌握希尔伯特－黄变换（Hilbert-Huang Transform，简称HHT）中的边际讲概念，证明了边际谱的线性性质，指出了文献中对边际谱概念的一种误解，提出了边际普与Fourier频谱之间本质区别的一种的新观点，即Fourier频谱的幅值只能反映频率在信号中实际存在的可能性大小，而边际谱的幅值则能真实反映频率在信号中是否存在。

Causes the difference of the inputs and the want to be integrated using forward Euler integration.

也就是说这个模块会把 input 的值和 want 的值的差值进行积分。

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。