New progress of in situ measurement of transient species is reviewed in detail.

In this paper,we analyse the measurement method of compressional wave velocity and acoustic attenuation in unconsolidated seafloor sediment,and develope an in situ measurement system based on this analysis.

The Measuring Principle and the Experimental Method of the Cold Fusion-Reaction Cross Section;

This paper brief discusses the effect of excess tilt of low-pressure gasholder on its operation, introduces the measuring principle and test methods about obliquity of low-pressure gasholder, evaluates the security of low-pressure gasholder operation according to test result.

This paper analyzes the measuring principle of the total station electronic techmeter, Total Station make people understand the working principle.

Measurement principle and calibration method of non-contact wheel aligner;

The article firstly introduces its performance characteristic,measurement principle and three reference terminations,then expatiates the principle of errors co.

A description is given to development of track detection car, including design requirements, measurement principle, mechanical structure, electrical design, and software and hardware for data acquisition.

The CHFR's measuring theory and specifications, cement′s effects on CHFR values and their corrections are introduced.