http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Lei Liu,Mingqiang Xiang,Hong Guo,Zhe Sun,Tao Wu,Huaping Liu 한국간호과학회 2020 Asian Nursing Research Vol.14 No.1
Purpose This study aimed to examine the reliability and validity of the Chinese-translated Behavioral Regulation in Exercise Questionnaire-2 (BREQ-2) for nursing home residents. Methods A convenience sample of 204 nursing home residents were used for measuring the instrument performances. Demographics form and BREQ-2 developed by Markland were applied. Results The translated BREQ-2 model was a good fit for the results of confirmatory factor analysis, χ2 was 276.75, comparative fit index was .94, standardized root mean square residual was .05, and root mean square error of approximation was .07. Results in the BREQ-2 indicated good consistency, Cronbach's α coefficient of BREQ-2 was .78, and each of the five subscales were ranged from .78 to .83. The test–retest was valued .84, and the five subscales ranged from .75 to .89, which supporting the stability of instrument. Conclusion This study provided psychometric evidence for the application of BREQ-2 among nursing home residents in China.
Bai, Chen,Mingqiang, Luo,Zhong, Shen,Zhe, Wu,Yiming, Man,Lei, Fang The Korean Society for Aeronautical and Space Scie 2014 International Journal of Aeronautical and Space Sc Vol.15 No.4
According to the requirement of wing weight estimation and frequent adjustments during aircraft conceptual design, a wing weight estimation method considering the constraints of structural strength and stiffness is proposed to help designers make wing weight estimations rapidly and accurately. This method implements weight predictions on the basis of structure weight optimization with stiffness constraints and strength constraints, which include achievement of wing shape parametric modeling, rapid structure layout, finite element (FE) model automated generation, load calculation, structure analysis, weight optimization, and weight computed based on modeling. A software tool is developed with this wing weight estimation method. This software can realize the whole process of wing weight estimation with the method and the workload of wing weight estimation is reduced because much of the work can be completed by the software. Finally, an example is given to illustrate that this weight estimation method is effective.
Chen Bai,Luo Mingqiang,Shen Zhong,Wu Zhe,Man Yiming,Fang Lei 한국항공우주학회 2014 International Journal of Aeronautical and Space Sc Vol.15 No.4
According to the requirement of wing weight estimation and frequent adjustments during aircraft conceptual design, a wing weight estimation method considering the constraints of structural strength and stiffness is proposed to help designers make wing weight estimations rapidly and accurately. This method implements weight predictions on the basis of structure weight optimization with stiffness constraints and strength constraints, which include achievement of wing shape parametric modeling, rapid structure layout, finite element (FE) model automated generation, load calculation, structure analysis, weight optimization, and weight computed based on modeling. A software tool is developed with this wing weight estimation method. This software can realize the whole process of wing weight estimation with the method and the workload of wing weight estimation is reduced because much of the work can be completed by the software. Finally, an example is given to illustrate that this weight estimation method is effective.
Acoustic system design and experimental research on the ultrasonic forming grinding gear
Xiao-bo Wang,Mingqiang Wu,Jiangwei Jin,Bo Zhao 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.8
In order to obtain high-performance gear elements with integrated shape, using non-resonant theory, the gear grinding experiment and ultrasound-assisted grinding acoustic system were established. Firstly, a theoretical model founded on the non-resonant proposed methodology was constructed. The frequency equation and displacement characteristics of the vibration system were established based on the specified boundary conditions, and the geometric size of the ultrasonic amplitude with a design frequency of 20 kHz was established. The acoustic system was simulated employing finite element software, and the analysis revealed that its frequency range was 19648 Hz, which was consistent with the design outcome. Meanwhile, the amplitude of the end surface of the tool gear reaches 5.59 μm, and the vibration was stable. Secondly, according to the solution of geometric parameters, the acoustic performance test was carried out. The error between resonant frequency (20387 Hz) and design frequency was 1.93 %, and the amplitude was 4.5 μm, which met the requirements of ultrasonic assisted grinding gear. Finally, the grinding test was carried out. The study results show that compared to conventional gear grinding, ultrasonic supported grinding lessens the grinding force by 11.5 % to 35.4 % and, at most, lowers the grinding temperature by 22.5 %.
Ultrafast epitaxial growth of metre-sized single-crystal graphene on industrial Cu foil
Xu, Xiaozhi,Zhang, Zhihong,Dong, Jichen,Yi, Ding,Niu, Jingjing,Wu, Muhong,Lin, Li,Yin, Rongkang,Li, Mingqiang,Zhou, Jingyuan,Wang, Shaoxin,Sun, Junliang,Duan, Xiaojie,Gao, Peng,Jiang, Ying,Wu, Xiaoson Elsevier 2017 Science bulletin Vol.62 No.15