http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
The Strategic Impact of the Summer Palace on China′s ″Silicon Valley″
Gao, Da-wei Korean Institute of Landscape Architecture 2001 Journal of the Korean institute of landscape archi Vol.1 No.-
The Haidian Garden of Zhongguancun Science and Technology Zone is an area with high intellectual intensity. It is therefore known as China's Silicon Valley. The Summer Palace, a World Heritage Site, sits in the northwest part of it. 250 years ago, the construction of imperial gardens in this area, including the Summer Palace, gave birth to the appearance and prosperity of the town of Haidian. This will also provide various opportunities for the growth of the science and technology. Today the green space, the cultural and ecological environment of the Summer Palace, and its 3-kilometer buffer zone are becoming one important strategic factor for the Haidian Garden to attract talents, improve international competitiveness and realize sustainable development. How to taking advantage of the favorable resources, to achieve balance between protection of the environment around the Summer Palace and urban development, will be of great importance in the future plans of the science and technology.
Da Li,Ikjae Lee,Cong Yi,Wei Gao,Chunhui Song,Shenglei Fu,Moohyun Kim,Alex Ran,Tuanjie Liu Techno-Press 2023 Ocean systems engineering Vol.13 No.3
The global performance of a 15 MW floating offshore wind turbine, a newly designed semisubmersible floating foundation with multiple heave plates by CNOOC, is investigated with two independent turbine-floater-mooring coupled dynamic analysis programs CHARM3D-FAST and OrcaFlex. The semisubmersible platform hosts IEA 15 MW reference wind turbine modulated for VolturnUS-S and hybrid type (chain-wire-chain with clumps) 3×2 mooring lines targeting the water depth of 100 m. The numerical free-decay simulation results are compared with physical experiments with 1:64 scaled model in 3D wave basin, from which appropriate drag coefficients for heave plates were estimated. The tuned numerical simulation tools were then used for the feasibility and global performance analysis of the FOWT considering the 50-yr-storm condition and maximum operational condition. The effect of tower flexibility was investigated by comparing tower-base fore-aft bending moment and nacelle translational accelerations. It is found that the tower-base bending moment and nacelle accelerations can be appreciably increased due to the tower flexibility.
Tracking Control for a Quadrotor via Dynamic Surface Control and Adaptive Dynamic Programming
Qiang Gao,Xin-Tong Wei,Da-Hua Li,Yue-Hui Ji,Chao Jia 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.1
In this paper, a data-driven control algorithm based on the Dynamic Surface Control and the ActionDependent Heuristic Dynamic Programming is proposed to realize the stable tracking control of the quadrotor. Firstly, the dynamic surface control is addressed for the nonlinear model of the quadrotor, which can overcome the “explosion of complexity” problem encountered in traditional back-stepping method inevitably. The controller designed by Dynamic Surface Control is served as the main controller in the total control structure. Secondly, the Action-Dependent Heuristic Dynamic Programming is investigated to construct a complementary attitude controller by involving the learning mechanism. The adoption of Action-Dependent Heuristic Dynamic Programming can provide the capability of adaptation and disturbance rejection to improve the tracking control performance effectively. The overall closed-loop system is proved to be asymptotically stable by the Lyapunov theorem. Finally, the numerical simulation and flight experiments are presented to demonstrate that the proposed tracking control scheme exhibits an excellent tracking performance in the case of external disturbances.
Polymer Nanostructured Components Machined Directly by the Atomic Force Microscopy Scratching Method
Yong Da Yan,Da Wei Gao,Zhen Jiang Hu,Xue Sen Zhao,Jiu Chun Yan 한국정밀공학회 2012 International Journal of Precision Engineering and Vol. No.
This study aims to machine complex three dimensional nano-structures on polymer surfaces directly using the Atomic Force Microscopy (AFM)-based nano-mechanical processing method. Processing parameters including the normal load, the feed rate, the machining speed and the scanning direction are optimized by the Taguchi method. Their effects on the machined depth and the surface roughness of the machined structures are analyzed. Meanwhile, the AFM PZT tube is controlled to achieve the tip’s three-dimensional motions in space. Using the optimized processing parameters, three-dimensional nanostructures on the surface of PMMA are directly fabricated. It is a novel low-cost manufacturing method for machining complex three-dimensional nano-structures or nano parts on polymer surfaces directly.
Development and characterization of a fully functional small anti-HER2 antibody
( Jie Gao ),( Bo Hua Le ),( Hui Mei Li ),( Xun Min Zhang ),( Da Peng Zhang ),( Lei Zhao ),( Chong Wang ),( Chen Fang ),( Wei Zhu Qian ),( Sheng Hou ),( Geng Kou ),( Hua Feng Wei ),( Shu Shi ),( Hao Wa 생화학분자생물학회 2009 BMB Reports Vol.42 No.10
Fault Diagnosis and Optimal Fault-Tolerant Control for Systems with Delayed Measurements and States
Juan Li,Hong-Wei Gao,Peng Zhang,Da-Rong Huang 제어·로봇·시스템학회 2012 International Journal of Control, Automation, and Vol.10 No.1
This note deals with the problems of fault diagnosis and fault-tolerant control for systems with delayed measurements and states. The main contribution consists in two aspects. First, by solving the Riccati equation and Sylvester equation, an optimal fault-tolerant control law is designed for systems with delayed measurements and states. The existence and uniqueness of the optimal fault-tolerant control law are proved. Second, the physically unrealizable problem of the optimal fault-tolerant con-trol law is solved by proposing a novel fault diagnoser for systems with delayed measurements and states. Finally, a numerical example is given to demonstrate the feasibility and validity of the proposed schemes.
Common Genetic Variations in the MUC5AC Gene are Not Related to Helicobacter pylori Serologic Status
Zhou, Cheng-Jiang,Zhang, Liu-Wei,Gao, Fang,Zhang, Bin,Wang, Ying,Chen, Da-Fang,Jia, Yan-Bin Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.24
Several lines of evidence suggest that MUC5AC genetic polymorphisms might confer susceptibility to H. pylori infection and therefore gastric cancer risk. We here assessed the association of common polymorphisms in the MUC5AC gene with H. pylori seroprevalence using an LD-based tagSNP approach in a north-western Chinese Han population. A total of 12 tagSNPs were successfully genotyped among 281 unrelated ethnic Han Chinese who had no cancer history, and no identifiable gastric disease or genetic disease. No significant association between any alleles, genotypes or haplotypes and H. pylori seroprevalence was observed. Our results suggest that common genetic variations in MUC5AC gene might not make a major contribution to the risk of H. pylori infection.
Mechanical behavior of crumb rubber concrete under axial compression
Ren, Rui,Liang, Jiong-Feng,Liu, Da-wei,Gao, Jin-he,Chen, Lin Techno-Press 2020 Advances in concrete construction Vol.9 No.3
This paper aims at investigating the effect of crumb rubber size and content on compressive behaviors of concrete under axial compression. Concrete specimens are designed and produced by replacing natural aggregate with crumb rubber content of 0%, 5%, 10%, 15% and three different sized crumb rubbers (No. 20, No. 40, No. 80 crumb rubber). And the failure mode, compressive strength, elastic modulus, stress-strain curves, peak strain and ultimate strain are experimentally studied. Based on the test results, formulas have been presented to determine the compressive strength, elastic modulus, the relationship between prism compressive strength and cube compressive strength, stress-strain curves and peak strain of crumb rubber concrete (CRC). It is found that the proposed formulas agree well with the test result on the whole, which may be used to practical applications.
Chen, Yu-Sheng,Bo, Xiao-Bo,Gu, Da-Yong,Gao, Wei-Dong,Sheng, Wei-Zhong,Zhang, Bo Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.1
Background: The aim of this study was to establish the feasibility and efficiency of different pelvic drainage routes after laparoscopic abdominoperineal resection (LAPR) for rectal cancer by assessing short-term outcomes. Materials and Methods: Clinicopathological data of 76 patients undergoing LAPR for very low rectal cancer were reviewed retrospectively between June 2005 and June 2014. Outcomes were evaluated considering short-term results. Results: Of 76 relevant patients at our institution in the period of study, trans-perineal drainage of the pelvic cavity was performed in 17 cases. Compared with the trans-perineal group, the length of hospital stay was shorter in the trans-abdominal group, while the duration of drainage and the infection rates of the perineal wounds between two groups showed no significant differences. Conclusions: The outcomes of this study suggest that trans-abdominal drainage of pelvic cavity is a reliable and feasible procedure, the duration of drainage, infection rates and the healing rates of the perineal wounds being acceptable. Trans-abdominal drainage has a more satisfactory effect after laparoscopic abdominoperineal resection for rectal carcinoma.