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This paper summarizes the importance of strain monitoring, points the characteristics and the main difficulty in strain monitoring of geotechnical. From the current situation in Strain monitoring of geotechnical engineering, it analyzes and summarizes the principle and the practical application of the advantages and disadvantages of strain gauges, fiber Bragg grating and distributed optical fiber. Finally, it designs an overview of geotechnical engineering strain monitoring system, nine principles of strain monitoring system to be put forward, and the direction of geotechnical engineering is the development of strain monitoring system and application.

A technical design and implementation method of a ionizing radiation testing system, which is especially applicable to conduct experiments of studying X-ray and γ-ray radiation effects in emerging semiconductor materials and devices, has been demonstrated by connecting components of a PC, a KEITHLEY 487, a HP 8110A, an Agilent 4284A, and a probe station together. The lead thickness of the lead shielding cylinder container is obtained numerically at least 2.1cm for safely holding a 1 GBq Cs137 γ-ray source.