Subjects: Astronomy >> Astrophysical processes submitted time 2022-12-05 Cooperative journals: 《天文研究与技术》
Abstract： The beam expanding optical system is highly sensitive to temperature. In order to reduce the influence of temperature on the optical system, an automatic temperature compensation mechanism is designed. The mechanism compensates each other through the difference of thermal expansion coefficient between materials, thus ensuring the stability of mirror spacing. And ANSYS software is used to analyze the change of primary and secondary mirror spacing when the beam expansion system temperature rises from 20℃ to 30℃, 40℃, 50℃. Finally, the optical simulation analysis of the changed system is carried out by ZMAX software. The analysis results show that without the design of automatic temperature compensation mechanism, the distance between primary and secondary mirrors of the beam expansion system optical system changes 0.02722mm, 0.05443mm, 0.08164mm respectively, and the system wavefront error RMS changes from 0.0013λ to 1.3898λ, 2.7782λ, 4.1656λ (λ= 632.8nm), unable to meet the requirements of optical imaging quality; After the automatic temperature compensation structure is adopted, the primary and secondary mirror spacing of the beam expanding optical system changes 0.00005mm, 0.00009mm and 0.00014mm respectively, and the system wavefront error RMS changes from 0.0013λ to 0.0026λ, 0.0046λ, 0.0072λ. It can still meet the requirements of optical imaging quality. Therefore, the automatic temperature compensation mechanism can effectively restrain the influence of large temperature difference on the imaging quality of the beam expanding optical system.
Subjects: Library Science，Information Science >> Information Science submitted time 2017-11-05 Cooperative journals: 《智库理论与实践》
Abstract： ［Purpose/significance］While the construction of new types of think tanks to serve scientific decision-making has become a new social hotspot currently, the lack of organization and guidance, reporting channel, processing and feedback mechanism, evaluation and encouragement system, restricts local think tanks in playing the role of effectively offering advice and suggestions. ［Method/process］Considering this, the research group took Shandong Province for example, and investigated the construction of new types of think tanks, held a deep discussion with responsible comrades of some provincial departments, universities, research institutes, enterprises and social organizations. ［Result/conclusion］Finally, some suggestions are put forward to solve the problems above, such as constructing the new types of think tanks’ organization system of Shandong, building think tank circles for the party and each government department, perfecting the evaluation and incentive mechanism of think tank talents, improving the management mechanism of the think tank, and exploring the establishment of decision-making advisory committee.
Subjects: Nursing >> Nursing submitted time 2022-11-06
Abstract： After stroke, patients are prone to suffer hemiplegia, aphasia, insomnia, depression, constipation and other sequelae, reducing the quality of life of patients. As a traditional external treatment of Traditional Chinese Medicine, auricular acupuncture has the advantages of easy access to materials, easy operation, little pain, safety, effective and easy to accept, and has been gradually applied in the treatment of apoplexy sequelae. The paper summarized the related literature of auricular acupuncture therapy in the treatment of apoplexy sequelae in recent years, and summarized the origin, application and research of ear acupuncture, so as to provide reference for auricular acupuncture therapy in the treatment of apoplexy sequelae and provide a basis for auricular acupuncture therapy research.
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