共查询到19条相似文献,搜索用时 109 毫秒
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作图法处理数据是大学物理实验训练内容之一。本文强调了作图法的作用与优点,较详尽的说明了作图法的具体规范以及如何用图线上的直线与斜率导出物理量的方法,最后给出作图法处理数据不确定度的一般方法。 相似文献
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作图法的优点是简便、形象、直观,有取平均值的效果,便于发现测量错误.利用作图法处理实验数据,有利于进一步研究实验结果,求出某些物理量,建立关系式等.在中学物理实验中,作图法在部分实验数据处理中有着广泛的应用。 相似文献
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作图法研究物理实验数据处理中的线性回归问题 总被引:1,自引:0,他引:1
用作图的方法研究物理实验数据处理中的一元线性回归问题,通过作回归直线和标准差平行四边形,求出线性回归方程标准差和相关系数。 相似文献
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矩阵计算和多领域的算法库是Malab科学计算软件的核心,它所提供的大量函数库为科研工作者进行专业领域实验提供了巨大的方便。Matlab数据库工具箱虽然开启了自动化调用数据的功能,但是并不是每位科学实验的研究者均具备数据库编程和书写SQL语句的技能,而大规模参数赋值却是科学实验的基础。因此通过介绍工具箱中Query Builder的使用,建立ODBC/JDBC兼容数据源,对大规模实验数据进行自动抽取数据、变量赋值及图形化表示、函数测试及调用。实现不书写任何计算机语句,完成大规模数据的调用赋值以及函数调用的功能,旨在帮助实验者快速完成物理数据的计算工作。 相似文献
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The numerical simulation of radiative heat transfer is now well established. Key ingredients in such a simulation model are calculated view factors that are used to describe the exchange of radiated energy between different surfaces. Several methods for the calculation of these geometrical factors are available, including Integration, Monte Carlo, and the Hemi-cube methods. Several analytical test cases are also available, such as the well-known “parallel plates” case, which allow modelers to validate their view factor routines. However, there is much less information available that combines both view factor information and heat transfer effects simultaneously. This article describes the construction of a simple testing rig that allows experiments to be performed that combine view factor effects with measured heat transfer exchanged between surfaces only. The equipment has been used to consider simple cases, such as the parallel plates test case, and also cases where shadowing is important. The results of these experiments are presented as experimental benchmarking data for model users and developers. 相似文献
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对实验数据处理中经常遇到的线性参数估计和作为间接测量量计算的问题进行了分析、比较。指出最小二乘参数不确定度不同时应该使用不同的对应公式,如果此情况下将参数作为间接测量量计算,往往更方便、简单。 相似文献
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Ana Tost Carolina Migliorelli Alejandro Bachiller Ins Medina-Rivera Sergio Romero ngeles García-Cazorla Miguel A. Maanas 《Entropy (Basel, Switzerland)》2021,23(8)
Rett syndrome is a disease that involves acute cognitive impairment and, consequently, a complex and varied symptomatology. This study evaluates the EEG signals of twenty-nine patients and classify them according to the level of movement artifact. The main goal is to achieve an artifact rejection strategy that performs well in all signals, regardless of the artifact level. Two different methods have been studied: one based on the data distribution and the other based on the energy function, with entropy as its main component. The method based on the data distribution shows poor performance with signals containing high amplitude outliers. On the contrary, the method based on the energy function is more robust to outliers. As it does not depend on the data distribution, it is not affected by artifactual events. A double rejection strategy has been chosen, first on a motion signal (accelerometer or EEG low-pass filtered between 1 and 10 Hz) and then on the EEG signal. The results showed a higher performance when working combining both artifact rejection methods. The energy-based method, to isolate motion artifacts, and the data-distribution-based method, to eliminate the remaining lower amplitude artifacts were used. In conclusion, a new method that proves to be robust for all types of signals is designed. 相似文献
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