The results show:from the midstream to downstream,the difference product curves of hydrological stations are rising at first,then continually going down.
研究结果表明:随着从上游至中下游的顺序,各水文站年径流量差积曲线先上升,而后呈长时期连续下降的趋势,而且顺河流方向越往下,曲线的坡度越明显,即径流量减少的趋势越明显,但黑河干流上游地表径流在过去的几十年里并没有减少,且有一定程度的增加,这说明各水文站径流的差积曲线主要是由于人类活动的影响,导致下游生态环境受损。
The problem of the error accumulation,three different kinds of linear size marking form is analysed here.
分析了尺寸公差法标注尺寸的三种形式，它们都存在不同程度的误差积累，在一定条件下采用位置度注法，可以解决尺寸标注中的误差积累问
Image alignment error is classified as type I error and type II error in this paper for the error accumulation and image mismatch of microscopic image mosaicing,and a global image alignment model of image mosaicing is proposed to deal with these two types of error.
针对显微图像拼接中的误匹配和误差积累问题,把图像对准误差划分为第一类误差和第二类误差,并提出了一种新的图像拼接方法。
Based on the simplification of differential equation of driving function and the amendment of control law with error integral, the problems of controller design for a class of position serve system are discussed from the angle of practical use in engineering.
基于对驱动函数微分方程的简化和对控制律的误差积分修正 ,从工程实用角度讨论一类位置伺服系统控制器的设计问题。
At the same time,it introduces the error integrator to avoid static errors,which exists in the traditional fuzzy control.
针对火电厂主汽温系统的大滞后、大惯性、非线性等特点,在对龙升照等提出的解析式类型控制规则进行改进的基础上,提出了一种新型的模糊控制策略,采用优选法进行参数的寻优,克服了现场操作人员和专家经验的束缚,并引入了偏差积分环节,消除了传统模糊控制存在的静态误差。