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Although the improved strain HR‐5 of Pyropia haitanensis has improvement in yield and quality, it shows earlier maturation and shortened growth period. In this study, blades of HR‐5 strain were treated with 60Co‐γ ray irradiation, and a mutant strain ST‐2 was selected and characterized. The blade length of ST‐2 strain was 401.4 cm on day 70 post‐culture, which was 1.9‐fold longer than that of the...
A heat-resistant Pyropia yezoensis strain YZ-4 was isolated from the regenerated blades of single somatic cells of the wild-type (WT) blades treated with 60Co-γ-irradiation. When cultured at 23 °C and 24 °C, the survival and division rates of the YZ-4 conchospores were significantly higher than those of WT (P < 0.01). After 16 days in culture the survival rates of YZ-4 conchospores were 71.2% and...
In the needs of horizontal impact test, the force measurement is proposed based on tri-component force, through testing method validation experiments to measure the feasibility and proposed calibration method of tri-component force plant. The experimental data shows that the test method is feasible and test system is reliable to meet the test requirements.
This paper focuses on rotor dynamic analysis of the magnetic levitation based high-speed electrical machine. Firstly, the dynamic model of the magnetic levitation rotor is established and the support stiffness of the magnetic bearings is calculated. Furthermore, the rotor system's dynamic analysis with ANSYS software is implemented with the assumption that magnetic bearing is considered as a certain...
Proposing a theoretical model of calibrating the large-scale unit to its center which is based on the PSD, which is acronym for position sensitive detector, and photoelectric technology. The principle of least square method is applied to the multi-spot fitting the center of the bearing shell and the spatial straight line for optimum calibrating. The numeral partial-differentiation equations set are...
The paper puts forward a new high-precise noncontact measuring method combining photoelectricity and machinery in limited deep cavity to detect form and position of blind hole. System is composed of high-precise drive mechanism, endoscopic optical path, precision raster part, imaging acquisition and processing part. Endoscopic optical system is moved linearly through drive mechanism in limited deep...
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