subtractions

The arithmetic expressions could be divided into a set of additions , subtractions , multiplications and divisions . These operations can be concurrently executed at a certain degree .

算术表达式的求值可以分解成一组加法、减法、乘法和除法运算，这些运算在一定程度上是可以并行的。

The plus sign is used in addition and the minus is used in subtraction .

加号用于加法；减号用于减法。

There will be simple tests in addition , subtraction , multiplication and division .

会有对加、减、乘、除运算的简单测试。

He used concrete objects to teach addition and subtraction .

他用实物来教加减法。

They made a subtraction of 50 dollars from my salary .

他们从我的薪水里扣除了五十美元。

Use three image features as a measure of image subtraction .

使用三个图像特征量作为衡量图像相减结果的依据，实验证明了这三个特征量分别对物体检测结果的贡献。

Background subtraction using gaussian mixture models based on adaptive learning rate

基于自适应学习速率混合高斯模型的背景消除

Review on the Research for Addition and Subtraction Word Problem Solving

加减文字题解决研究概述

Mixture Gaussian model is one of background subtraction methods .

混合高斯模型是背景对消中一种非常有效的方法。

First , the paper used background subtraction to detect the motion vehicle .

首先，在运动检测方面，本文采用背景差分法检测运动目标。

A New Method of Background Subtraction for Energy Dispersive X-ray Spectra

一种新的X射线能谱背景扣除方法

An Approach to Face Recognition Based on Image Subtraction

基于图像差值的人脸识别法研究

A Research on Digital Subtraction Angiography ( DSA ) Image Processing System

数字剪影血管造影（DSA）图象处理系统研究

The key technique to background subtraction is background modeling .

背景减法进行运动目标检测的关键技术之一是背景的建模方法。

Study on Digital Subtraction Angiography Based on Micro-computer System

数字血管减影系统的研究

Various methods of target detection include the background subtraction method and the optical flow method .

目标检测的各种方法，主要包括背景消除法和光流法等等。

Experimental Study on Mathematics Learning Disabled Children 's Solving Simple Addition and Subtraction

数学学习困难儿童解决简单加减法的认知特点的实验研究

The Multi - Resolution Image Registration Algorithm for Digital Subtraction Angiography

多分辨率的数字减影图像配准算法

Making Designs for A Digital Subtraction Subsystem of Medical Image

医学影像数字减影子系统的设计

A Method Based on Fractional Spectral Subtraction for Speech Enhancement

基于分数阶谱相减的语音增强法

On the basis of the former work , we improve the background subtraction algorithm .

在前人工作基础上，改进了背景更新算法，提高了算法实时性。

A speech enhancement method based on iterative multi - band spectral subtraction algorithm

一种基于迭代多带谱相减的语音增强方法

The quality of the subtraction image is improved by the multi exposure .

采用多次曝光技术，提高了相减象的质量。

Speech Enhancement Approach Based on Minimum Estimate and Spectral Subtraction

基于最小统计及谱减法的语音增强

Method of speech enhancement based on recursive averaging and spectral subtraction

利用递归平均和谱减技术的语音增强方法

Application of a spatial transformation method based on stretching to digital subtraction angiography registration

基于拉伸空间变换算法在DSA配准中的应用

In processing , improved background subtraction method saves vehicle information efficaciously .

在处理过程中，对常用的背景差方法进行了改进，有效的保留了车辆目标信息；

A fast image registration technique in digital subtraction angiography with cross template

基于十字模板的数字减影图像配准快速算法

Dual Energy Subtraction and Its Clinical Application

双能量减影及其临床应用

Thus , when the two seismic response subtraction , the difference is relatively large .

这样，当两次地震响应相减时，差异就比较大。