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1)  difference method
差值法
1.
Heavy metal and clay pollution information of waste ores has been extracted by mineral index and water pollution information by difference method and vegetation stress by density slice of NDVI based on ASTER data and reflectance curves of objects measured in the field.
利用ASTER数据结合野外实测各类地物反射光谱曲线,利用矿物指数提取矿区重金属和粘土污染;采用差值法提取水体污染状况;采用NDVI彩色密度分割法提取矿区植被污染信息。
2.
In this paper a novel measurement of wave-height—Difference Method is advanced.
文中提出新颖的海浪波高测量方法—差值法,结合实例详细说明差值法的基本原理和算法,并对差值法采集的相关问题进行分析。
3.
In different measurement systems,the error correction effect is also different for the difference method and the ratio method.
差值法与比值法对不同测量系统的误差修正效果不一样。
2)  differential method
差值法
1.
A practical method named as differential method to determine construction cable tension force of cable-stayed bridge was proposed.
提出了用差值法确定一次张拉斜拉桥施工阶段拉索初张力的实用计算方法,该方法只需按施工步骤进行正装迭代计算。
2.
In this paper the differential method is introduced to reduce some addition error in test.
对于实验中存在的某些加性误差,可以用差值法减小这种误差。
3)  imagine subtraction and threshold selection
差值阈值法
4)  difference ratio
差比值法
1.
Application of difference ratio of equivalent elastic modulus in identifying low resistivity hydrocarbon layers;
等效弹性模量差比值法在识别低阻油气层中的应用
5)  difference arithmetic
差值算法
1.
Further more,according to the characteristic of long-distance real-time broadcast and the redundancy of video signal,the paper establishes a difference arithmetic on the basis of frame transform and then analyses the error,gives a correspond physical model in order to satisfy the demand of longdistance control for over-axis signal.
并针对远距离实时转播的特点和视频信号的冗余性,在帧变换的基础上引入了差值算法,并进行了误差分析,提出了相应的物理模型,以满足对越轴画面的远程控制。
6)  R_o difference method
R_o差值法
补充资料:差值傅里叶法
分子式:
CAS号:

性质:在晶体结构分析中广泛应用的一种技巧。用它可在扣除先解析出已知原子坐标的基础上不断搜索待解析、未知原子的空间位置。设|F′c|与φ′相应为根据已知重原子或部分原子或非氢原子的坐标算得的结构因子模与位相的计算值,|FO|是结构因子模的实测值,则差值电子密度函数△ρ按下式进行计算由△ρ傅里叶级数的计算结果中可导出已知原子以外的原子坐标信息。因上式中傅里叶系数与结构因子模实测值与计算值的差值相关,故称作差值傅里叶法。

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