first vertical derivation是什么意思

网络释义

用法例句

It is a new method that calculates vertical second derivative of gravity anomalies based on discrete cosine transform(DCT).

基于离散余弦变换(DCT,Discrete Cosine Transform)的重力异常垂向二阶导数的计算方法,是笔者提出的新方法。

It is a new method that calculate vertical second derivative of gravity anomalies based on discrete cosine transform(DCT).

基于离散余弦变换(DCT)的重力异常垂向二阶导数的计算方法是笔者提出的新方法。

In this paper, a new edge detection method——method using extremum of first directional derivative is proposed, based upon a general gradient edge model.

文中通过傅里叶变换（Ｆｏｕｒｉｅｒｔｒａｎｓｆｏｒｍ ），在频率域，通过求垂直于边缘的一阶方向导数，并检测其极值（极大或极小）点来确定边缘。

The vertical derivatives are widely used in processing and interpretation of potential field data,the conventional space domain formulas of calculating vertical derivatives are mostly based on Taylor series which do inevitably bring the truncation error,and are inconvenient to get higher-order derivatives.

垂向导数广泛应用于位场数据处理和解释中,常规的空间域求导公式多以台劳级数为基础,这不可避免会引入截断误差,且不便于求取高阶导数。

Methods:First derivative spectrometry was established.

方法:采用一阶导数分光光度法,测定波长为275nm和317nm。

Determination of the content of allantoin in allantoin-vitamin E cream by zero-crossing first-derivative spectrophotometry;

零交一阶导数分光光度法测定尿囊素维E乳膏中尿囊素含量

DCT METHOD FOR CALCULATING VERTICAL SECOND DERIVATIVE OF GRAVITY ANOMALIES--Modeling Experiment

计算重力异常垂向二阶导数的DCT法——模型实验

ON THE NUMERICAL PROCESSING OF AEROMAGNETIC DATA-TOTAL FIELD REDUCED TO THE POLE, ITS SECOND DERIVATIVE AND THE CONTINUATION

航磁资料数字处理——垂直换算、垂直二阶导数及延拓计算

MODIFIED ALTERNATING DIRECTION METHODS FOR SOLVING A TWO-DIMENSIONAL NON-CONTINUOUS SEEPAGE FLOW WITH FRACTIONAL DERIVATIVES

修正交替方向法求解具有分数阶导数的二维非连续渗流问题

Notes on Second Mixed Partial Derivative of Binary Function;

关于二元函数二阶混合偏导数的注记

Positive Solutions of Second Boundary Value Problems with Dependence on the First Order Derivative

含有一阶导数的二阶边值问题的正解

A deductive proof of Hermite interpolation formula with the second derivative values;

带二阶导数的Hermite插值公式的推导

CALCULATION OF THE FIRST AND SECOND ORDER PARTIAL DERIVATIVES OF EIGENPAIRS OF QUADRATIC EIGENVALUE PROBLEMS

二次特征值问题特征对的一阶与二阶偏导数

A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data

位场数据归一化总水平导数垂向导数边缘识别方法(英文)

Abstract: Zero-crossing edge detection method was analyzed.

文摘:讨论二阶导数过零边缘检测方法。

The Weaken Surfficient Condition on Equality of Second Order Mixed Partial Deriative;

关于二阶混合偏导数相等的充分条件

Convergence for a Family of Iterations with the Second-Order-Derivative-Free

避免二阶导数计值的迭代族的收敛性

Numerical Simulation of Vertical 2-D Flow Affected by Roughened Apron;

海漫加糙影响下水流垂向二维数值模拟

Study on Width-Averaged 2-D Numerical Simulation for Tidal Flow;

潮汐水流宽度平均的垂向二维数值模拟研究

Vertical 2-D Wave Numerical Model Research on the Hydraulic Natures of Breakwaters;

防波堤水力特性的垂向二维波浪数学模型研究

The function (f')is usually written simply f" and is called the second derivative.

函数（f’）通常简写成f”，并称之为f的二阶导数。

Extrapolation method of five-point numerical formulas for two-order derivative

二阶导数的五点数值微分公式及外推算法

A STUDY ON EDGE LOCATION ERROR OF SECOND DERIVATIVE EDGE DETECTION OPERATORS

二阶导数型边缘检测算子边缘定位误差的研究

Second Order Derivatives Based Differential Approaches to Nonconvex Constrained Optimization;

基于二阶导数的非凸约束优化的微分方程方法