综述了无破坏法测定金属杨氏模量的测定原理、测定方法和测定仪器，并对这种测定方法进行了误差分析。
Principle, method and apparatus for young's modulus measurement of metallic material by indentation method are reviewed, and the methods error is analysed.
本文介绍了织物纰裂的测定方法、原理和指标，并且列举了几种织物进行测定及分析。
The article introduces determining method, principle and target of fabric slipping mark. It also enumerates several fabrics to have been determined and analysed.
本文重点论述了航摄系统调制传递函数的原理，测定方法和实际应用。
This paper offers a general account of the principle, measurement method and practical application of modulation transfer function in aerial photographic system.
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