查询词典 calculation error

But in the numerical calculation process, such as numerical differentiation, if we use these numerical methods inadequately, then it may be induced non necessary numerical error, including round off and truncation error.

因而常必须以值方法替代解析解，但是在值计算的过程中，很容引入额外的计算误差，包括舍位误差与截断误差。

This paper discusses a fast calculation method of GPS carrier phase integer ambiguity resolution, analyze independent variables in search space, derivate new residual transition matrix which directly associates all measurement error with minimum search space, and search space is minimized through selecting the ambiguity combination which is consistent with satellite geometry size and measurement error.

探讨了一种GPS载波相位整周模糊度的快速求解方法，分析了搜索空间中的独立变量，推导出了新的传递矩阵。该矩阵将所有的测量残差直接和最小求解搜索空间相关联，通过仅选择那些与卫星几何尺寸和测量残差一致的模糊度的组合，搜索空间被最小化。

This thesis attempts to innovate at two points, as follows:Theoretically, it endeavors to explore the value of SA from the aspect of index error. It analyzes the source of indices\' error, uses its theoretical meaning and economical significance to put forwards some methodic suggestions to some index-related issues, such as calculation of weights in index, evaluation of index formulas, structure analysis of layered issues, and etc.Practically, this thesis quests for the settlements of some difficulties in China\'s compilation of macroeconomic price index by the means of SA. Besides, it tries to make an innovative use of SA to Regional Economics. Improving on Theil\'s index with SA, it makes an empirical study on China\'s regional disparities since reform-policy was adopted.

本文尝试在以下两方面有所创新：理论研究方面，从指数误差的角度挖掘随机指数的理论价值，并围绕误差来源及其本身的理论内涵和经济意义，探讨了诸如指数权数确定、公式选择、分层指数的结构分析和可信度检验等疑难问题；实践应用方面，就价格指数编制实践中的一些具体问题(如基本价格指数的公式选择、高层汇总的权数确定等)提出了随机指数方法的改进方案，并将该方法首次拓展到区域经济学，通过随机方法下泰尔指数及其分解分析的运用，对改革开放以后中国区域经济差距的问题进行了实证研究。

The collimation error correction and orthometric correction (altitude over more than 100 m in the examining area) must be involved in the systematic error corrections of third-order level calculation.

但是在视准轴误差方面，不管是二等或是三等水准测量，若使用电子水准仪时，则因仪器已在内建之程式中自动加入改正，换句话说，根本不需另外再改正。

Calculation formulae were derived for the maximum angle error of the outputting gear caused by the tangential synthetic tolerance and the last motion error angle caused by normal directional side clearance.

推导出了由切向综合公差引起的输出齿轮最大角度误差的计算公式和由法向侧隙引起的空回误差角的计算公式。

The results show that the error of considering the curve of strand as line is less than 2%, through the comparison with the result of FEA and experimental data, the error of principal tensile stress is less than 0.2 MPa, which prove that the precision of the method meets engineering calculation requirement, the method is feasible.

理论分析结果显示，将预应力束的平弯曲线用直线代替产生的误差不超过2%，该公式计算结果与有限元结果及实测数据比较表明，主拉应力的计算误差小于0.2 MPa，结果满足工程精度需要，该方法可行。

The key technologies of Grid Method including grid divided in basin, impact radius of rainfall and number of reference rainfall stations have been discussed with example. The parameters of Grid Method have been selected through trial and error. Using simple random sampling to simulate the failure to collect rainfall, the relation between surface rainfall calculation error and station density, station distribution, uneven spatial distribution of rainfall has been sought.

论文探讨了流域网格剖分、降雨影响半径、搜索半径范围和参证站数量等关键技术，研究了网格法参数的优选，并采用简单随机抽样模拟降雨缺测情况，给出了面雨量计算误差与流域站网密度、均匀度、降雨分布不均匀性指标的关系。

The result is evaluated using mean absolute error, maximum absolute error and minimum absolute error.

所选用的精度指标包括：绝对值平均误差、绝对值最大误差以及绝对值最小误差三种。

The dependent variables were absolute error, variable error, and error detection capability.

依变项为动作准确性、稳定度和错误侦察能力。

Through compared with the difference of the sampling inspection's OC curves between existent and nonexistent inspection error by utilizing grouping method, we get the conclusion that all the traditional methods are designed on the premise that there is none inspection error exist, so it would terribly depress the probability of acceptance and couldn't veritably reflect the quality of the lot for inspection, if the inspection error is exist when sampling inspecting.

同时通过对集团检验错误存在与否的抽样检验特征曲线的比较，指出：以往的集团抽样检验方案设计，都是在假设无检验误差前提下设计的，在抽样检验中，若存在检验错误，会严重影响抽样检验的接收概率，使抽样检验结果不能客观地反映检验批的质量。

"The operators will suffer a temporary decrease in the number of consumers and short message services as people may not like having to provide their ID cards for a phone number," Xu Junqi, vice-dean with the Policy-Making Institute of the Telecommunications Research Centre under MII, said yesterday.

信息产业部下属的通信决策研究院副主任徐俊其昨天说：&实行手机实名制后，人们可能不太情愿用身份证注册手机号，所以通信运营商会暂时面临用户减少和短信用户减少的问题。&

I don't believe in make-believe!

我不相信这些虚构的故事。