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Mr Roylance by Warwick Davis
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Comparison of tooth loss after periodontal treatment using the 1999 and 2018 systems of periodontal disease classification: a retrospective longitudinal study with over five years of follow-up
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Determination and quantification of a^b^g^d-unsaturated aldehydes as pentafluorobenzyl-oxime derivates in diatom cultures and natural phytoplankton populations: application in marine field studies
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- 저자 : Jingxian Yang (검색결과 4 건)
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Jingxian Wang,Min Yang 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.12
From the perspective of factor-supply distortion, combining innovation input in investigation into transformation and upgrading of foreign trade in China, network relation between factor-supply distortion, innovation input, macroeconomic environment, foreign trade structure and foreign trade transformation and upgrading were analyzed by constructing structural equation model. Studies have shown that: Factor-supply distortion exerts a negative impact on foreign trade transformation and upgrading by worsening foreign trade structure; innovation input exerts positive impact on foreign trade transformation and upgrading by optimizing foreign trade structure, but innovation input efficiency renders this impact insignificant; interaction between factory-supply distortion, innovation input, macroeconomic environment, foreign trade structure, foreign trade transformation and upgrading results in a stable convergence network system.
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Min Yang,Jingxian Wang 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.3
This paper made a systematic presenting for the external environment and spatial structure of enterprise innovation and defined the three-dimensional space of enterprise innovation based on the spatial economics and open innovation perspective. The ‘knowledge flow’ was used as an important dimension when delving into the dynamic feedback mechanism between the enterprise innovation and three-dimensional space, forming a systematic recognition for interaction mechanism of three-dimensional space, knowledge flow and the enterprise endogenous innovation. And then, a demonstration based on the structural equation model was used to provide a theoretical basis for the innovation decision of an enterprise. It followed that, the economic space, geographic space and human space all constitute the three-dimensional space of enterprise external knowledge flow. In the open innovation system, the non-rigid boundary of enterprises provides the possibility of the overflow, expansion and penetration of external knowledge. Again, through the mediation of knowledge flow, the dynamic interaction of system dynamics between the three-dimensional space and enterprise endogenous innovation was achieved.
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Structural analysis and testing of a miniature flexible joint under pressure and vector loading
Junxue Ren,Xiaoguang Zhang,Jingxian Yang,Chao Wang,Yu Liu,Wei Yang 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.9
The structural characteristics of a miniature tactical motor flexible joint subjected to pressure and vector loading were investigated usingfinite element analysis and bench test. Three-dimensional non-linear finite element analysis was conducted using ANSYS Code Version11.0. The axial deflection, vectoring torque, and stress distributions in elastomeric and reinforcement rings were presented. Thepredicted values were consistent with the test data. Results indicate that the axial compressive stiffness increased gradually and nonlinearlywith pressure, while the angular stiffness remained nearly constant in the vectoring angle range from 0° to 6°. Under pressureloading, the elastomeric shear stress was negative, high at both sides, and low at the center of the cross-section, while the reinforcementhoop stress was compressive at the inner radius and tensile at the outer radius. The compressive stress was also high. The flexible jointexhibited higher stress level with altered stress distribution when subjected to additional vector loading. Existing empirical formulas forreinforcement hoop compressive stress were determined to be not applicable to the miniature flexible joint, which significantly overestimatedthe stress caused by pressure and underestimated the stress caused by vectoring.
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Jianguo Liao,Yanqun Li,Xiali Guan,Jingxian Liu,Yongxiang Zhang,Yufen Xie,Zhengpeng Yang,Xingze Duan,Aiguo Zhou,Jiangnan Zhu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.10
Hydroxyapatite and strontium-substituted hydroxyapatite nanoparticles (n-HA and Sr-HA) were prepared by microwave-assisted solution synthesis with aqueous solutions of various Sr/(Sr+Ca) molar ratios ranging from 0% to 15%. The structural properties of the hydroxyapatite powders were investigated by X-ray powder diffraction, Fourier transform infrared spectroscopy and Raman spectra, field emission scanning electron microscopy coupled with energy dispersive X-ray spectrometry and transmission electron microscopy. The results confirmed that strontium ions had been incorporated into the hydroxyapatite lattice. The synthetic n-HA and Sr-HA nanocrystalline consisted of hydroxyapatite crystalline phase with hexagonal structure, and the particle size was 30–40 x 60–70 nm and 40–50 x 70–80 nm, respectively. The calcined HA particle size ranged from about 120 nm to 150 nm, the calcined Sr-HA products were composed of spherical aggregates with a size of about 70–100 nm. The incorporation of Sr ions lead to the formation of vacancies in the crystal structure of the HA. The results indicated that the strontium substitution did not change the crystal structures. More Sr resulted in less calcined crystallites and formed agglomerates owing to the size effect.
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