http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Xin Hu,Zhangqi Wang,Rui Tian 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.7
To limit the wind-induced deflection amplitude of an overhead conductor, this study proposes a calculation model and an optimization model for overhead lines. According to the geometric deformation relationship and the principle of energy conservation, a multi-rigidbody model (MRBM) is proposed for the wind-induced deflection of the overhead lines. An aeroelastic model wind tunnel test was designed to verify the accuracy of the MRBM; the efficiency of the MRBM was verified through comparison with the finite element model (FEM). The optimization model is presented, and the structural parameters of the transmission lines in the actual project are optimized and analyzed. The results show that the accuracy of the MRBM can meet engineering requirements; the solution time is shorter than FEM, and the MRBM is easily called by the optimization algorithm. The structural parameter optimization effectively limits the deflection amplitude of the overhead conductor according to the engineering requirements.
Study on an Exoskeleton Training Device for Hand Function Rehabilitation
HU Xin,YU Hong-Liu 한국재활복지공학회 2014 한국재활복지공학회 학술대회논문집 Vol.2014 No.11
Based on the structure and motion bionic principle of the normal adult’s fingers ,the biological characteristics of human hands were analized, and a wearable exoskeleton training device for the hand function rehabilitation of stroke patients or patients with hand trauma was designed. This device includes the exoskeleton mechanical structure and the electromyography(EMG) control system. With adjustable mechanism, the device was capable to fit different finger lengths, and by capturing the EMG of the user’s contralateral limb, the motion state of the exoskeleton hand was controlled. Then driven by the device, the user"s fingers conducting flexion / extension rehabilitation training. Finally, the mechanical properties and training effect of the exoskeleton hand were verified through mechanism simulation and the experiments on experimental prototype of the wearable exoskeleton hand function training device.
Abundant Manganese Complex-Anchored BiOI Hybrid Photocatalyst for Visible Light-Driven CO2 Reduction
Xin Xin,Ning Ma,Changying Hu,Qi Liang,Zhaoyong Bian 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.2
An abundant manganese complex-anchored BiOI hybrid system for CO2 photocatalytic conversion was constructed. Layered BiOI and tricarbonyl Mn bipyridyl complex with carboxyl acid groups were connected with covalent bonds and used as visible light antenna and CO2 reduction reaction centers, respectively. The covalent connection of this hybrid system benefits the transfer of electrons from the semiconductor to the Mn complex. The anchoring group (carboxyl) is the key to CO2 reduction for the direct coupling of the two units, facilitating the transfer of electrons from BiOI to the manganese complexes. The photocatalytic properties and stability of the tri-carbonyl Mn–bipyridyl complex were significantly enhanced with the aid of anchored BiOI. A high turnover number (TON = 74) of HCOO- formation from CO2 could be achieved using this hybrid system under visible light irradiation.
Study on fracture characteristics of reinforced concrete wedge splitting tests
Hu Shaowei,XU Aiqing,HU Xin,YIN Yangyang 사단법인 한국계산역학회 2016 Computers and Concrete, An International Journal Vol.18 No.3
To study the influence on fracture properties of reinforced concrete wedge splitting test specimens by the addition of reinforcement, and the restriction of steel bars on crack propagation, 7 groups reinforced concrete specimens of different reinforcement position and 1 group plain concrete specimens with the same size factors were designed and constructed for the tests. Based on the double-K fracture criterion and tests, fracture toughness calculation model which was suitable for reinforced concrete wedge splitting tensile specimens has been obtained. The results show that: the value of initial craking load Pini and unstable fracture load Pun decreases gradually with the distance of reinforcement away from specimens’s top. Compared with plain concrete specimens, addition of steel bar can reduce the value of initial fracture toughness KIini, but significantly increase the value of the critical effective crack length ac and unstable fracture toughness KIun. For tensional concrete member, the effect of anti-cracking by reinforcement was mainly acted after cracking, the best function of preventing fracture initiation was when the steel bar was placed in the middle of the crack, and when the reinforcement was across the crack and located away from crack tip, it plays the best role in inhibiting the extension of crack.
( Xinli Hu ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Piles have been widely used to stabilize landslides in reservoir area. The interaction between stabilizing piles and landslide body is complicated and is vital for evaluating the long-term safety of landslides and reservoirs. Taking the Majiagou landslide in Hubei Province, China, as a prototype, two physical models with and without piles were constructed with a geometrical similarity ratio of 1:40. The water level in the models was raised and maintained to an elevation of 0.89 m. The deformation, earth pressure, and pore-water pressure of the landslide and the strain of one representative pile were recorded during the tests. The comparison between the model with piles and that without piles shows that: (1) Piles significantly improved the deformation resistance of landslides. Landslides with piles can tolerate a larger deformation before failure and the displacement rate of landslides after failure was reduced; (2) The implantation of piles changed the soil pressure distribution of landslides. The soil pressures at the upslope and around the piles increased while those at the downslope decreased. The distribution of soil pressures along the depth at the uphill and downhill side of the piles changed from triangular to invert triangular and parabolic, respectively; (3) Piles arrested the anticipant slip surface that occurred in an unreinforced landslide, and at least two sliding bands traversed the landslide. (4) Comparison of the pile-reinforced landslide model with those in literature with piles with a much higher stiffness show that the stiffness of piles significantly affects the mechanical interaction between piles and landslides.
Xin-Yue Liu,Qing-Fang Yue,Lei Chen,Xiao-Mei She,Bin Hu,Yu Hu,Ping Zou 연세대학교의과대학 2016 Yonsei medical journal Vol.57 No.2
Purpose: The objective was to determine the characteristics and prognostic factors of 86 Chinese patients with trisomy 8 aberrationsand compare the prognostic value of International Prognostic System (IPSS) and Revised IPSS (IPSS-R) in this cohort. Materials and Methods: A total of 86 cases diagnosed with primary myelodysplastic syndromes (MDS) with isolated tr8 or with tr8 and other additional cytogenetic aberrations diagnosed and treated at the Union Hospital, Tongji Medical College of Huazhong University of Science and Technology between July 2002 and March 2013 were reviewed. Results: The median survival of the entire group was 23.0 months, and acute myeloid leukemia (AML) developed in 43% (37/86) patients within the follow up time. The univariate analysis revealed that overall survival (OS) was correlated with age, thrombocytopenia,absolute neutrophil count, marrow blasts, cytogenetic status and red blood cell transfusion at diagnosis, and the multivariateanalysis revealed that age, marrow blasts, cytogenetic status and transfusion dependence were independent parameters for the OS. The cytogenetic complexity and marrow blasts had the strongest impact on the AML transformation by multivariate analysis. Comparing the two prognostic systems, both two systems could successfully discriminate risk groups for survival. IPSS-R was more refined than IPSS for predicting OS, but had no advantage in predicting the risk of AML development. Conclusion: This study confirmed the influence of clinical factors on the prognosis of 86 Chinese MDS patients with trisomy 8. In addition, IPSS-R can further refine prognostic discrimination in the IPSS risk categories.