摘要
利用信噪比概念对测量平差质量提出了一种度量检验方式。分析了复共线性、数据列短型、待估参数数量级差异和模型误差等影响平差质量的一些关键因素,找到了这些因素在信噪比中的数值反映。通过对这些数值的进一步分析,给出了关键因素对平差质量综合影响的一种解释。对于研究测量平差特别是病态问题平差的质量具有一定的价值。
Using the concept of signal-to-noise ratio, a method to measure and test the quality of survey adjustment was put forward. The key factors which determined the quality, such as multicollinearity, short data, difference of parameters＇ amount levels and model errors, were analyzed. Some numerical expressions to these factors were discovered in signal-to-noise ratio. Through further analysis to these numerical expressions, an explanation to comprehensive effect of the factors on the quality was given. The conclusion was helpful to study the quality of survey adjustment, especially to conditional ones.
出处
《测绘科学技术学报》
北大核心
2009年第4期241-244,共4页
Journal of Geomatics Science and Technology
基金
国家自然科学基金资助项目(40474007)
"基础地理信息与数字化技术"山东省重点开放实验室课题(SD040202)
河南省自然科学基金资助项目(0511010100)
关键词
信噪比检验
复共线性
数据列短型
测量平差
质量
signal-to-noise ratio
multicollinearity
short data
survey adjustment
quality
