http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yu-Shuai Wang,Yin-Ping Jin,Wei Gao,Sheng-Yuan Xiao,Yu-Wei Zhang,Pei-He Zheng,Jia Wang,Jun-Xia Liu,Cheng-He Sun,Ying-Ping Wang 고려인삼학회 2016 Journal of Ginseng Research Vol.40 No.3
Background: Ginsenosides are the major effective ingredients responsible for the pharmacological effects of ginseng. Malonyl ginsenosides are natural ginsenosides that contain a malonyl group attached to a glucose unit of the corresponding neutral ginsenosides. Methods: Medium-pressure liquid chromatography and semipreparative high-performance liquid chromatography were used to isolate purified compounds and their structures determined by extensive one-dimensional- and two-dimensional nuclear magnetic resonance (NMR) experiments. Results: A new saponin, namely malonyl-ginsenoside Re, was isolated from the fresh flower buds of Panax ginseng, along with malonyl-ginsenosides Rb1, Rb2, Rc, Rd. Some assignments for previously published ¹H- and <SUP>13</SUP>C-NMR spectra were found to be inaccurate. Conclusion: This study reports the complete NMR assignment of malonyl-ginsenoside Re, Rb₁, Rb₂, Rc, and Rd for the first time.
Chemical Vapor Deposition Growth of Graphene Domains Across the Cu Grain Boundaries
Yang Wang,Yu Cheng,Yunlu Wang,Shuai Zhang,Chen Xu,Xuewei Zhang,Miao Wang,Yang Xia,Qunyang Li,Pei Zhao,Hongtao Wang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.08
Many aspects in the chemical vapor deposition (CVD) growth of graphene remain unclear such as its behavior near the catalyst grain boundaries. Here we investigate the CVD growth mechanism of graphene across the Cu grain boundaries using unidirectional aligned graphene domains, which simplifies the analysis of both graphene and Cu to a large extent. We found that for a graphene domain grown across the Cu grain boundary, the domain orientation is determined by the Cu grain where the domain nucleation center is located, and the Cu grain boundary will not change the growth behavior for this graphene domain. This growth mechanism is consistent with the Custep-attached nucleation and edge-attachment-limited growth mechanism for H-terminated graphene domains and will provide more guidance for the synthesis of high-quality graphene with less domain boundaries.
Remote Sensing Image Fusion Based On IHS and Dual Tree Compactly Supported Shearlet Transform
Chang Duan,Qihong Huang,Xuegang Wang,Shuai Wang,Hong Wang 보안공학연구지원센터 2014 International Journal of Signal Processing, Image Vol.7 No.5
This paper presents a novel remote sensing image fusion algorithm, which implements the intensity-hue-saturation (IHS) transform on panchromatic sharpening of multispectral data and the dual-tree compactly supported shearlet transform (DT CSST) during fusion. Shearlet transforms can provide almost optimal representation of the anisotropic features of an image. The spatial domain discrete implementation, the compactly supported shearlet transform (CSST), which represents the directions by dilation operations, are selected in the proposed fusion method. Since most of the prominent features of images, such as edges and regions, have limited sizes in the spatial domain, CSST is very suitable for image fusion. However, the conventional CSST is shift-variant, which causes distortions in fused images. With the embedded dual-tree (DT) sturcture in the CSST, the shift-variant properties can be effectively reduced. Combining the IHS transform and the DT CSST, an effective panchromatic and multispectral image fusion method is proposed in this paper. The experiments’ results suggest that the proposed method extract more spatial information from panchromatic images with less lost in spectral consistency compared to other fusion methods which are based on discrete wavelet transform (DWT), à trous wavelet transform, à trous shearlet transform, the dual-tree complex wave transform ( DT CWT), or the Curvelet transform.
( Shuai Zhang ),( Xiao Ren ),( Yanzhang Wang ),( Yongdi Wang ) 아시아스포츠융합과학회 2022 Asia Pacific Journal of Applied Sport Sciences Vol.3 No.1
PURPOSE This study used a sporting goods goal-oriented behavior model (SG-MGB) to predict and test consumers' behavioral intentions for purchasing sporting goods online. Based on the original MGB, the study added three constructs related to online consumption, and examined the factors that influence the online consumer's consumption decision-making process. METHOD A conceptual model containing 13 hypotheses was empirically tested using data from 271 Shanghai residents who have purchased sports goods online in the past 12 months. RESULT The results showed that consumers' positive anticipated emotion, negative anticipated emotion, past behavior frequency, and brand image all positively affected desire. Desire had the most significant positive effect on behavioral intention. Desire played a positive mediating role. CONCLUSION The study found that brand image is an important variable that affects consumers' willingness to buy sports goods online. The SG-MGB is a strong predictive model for online consumers' behavioral intentions.
A Trajectory Tracking Method for Wheeled Mobile Robots Based on Disturbance Observer
Shuai Wang,Junyong Zhai 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.8
In this article, an adaptive tracking control method is proposed for wheeled mobile robots (WMR). In thetrajectory tracking control of WMR, skidding and slipping are taken into account, and the slip degree parameters areintroduced. The disturbance observer is designed to estimate the total disturbances. Then, we design the adaptivecontroller to guarantee that the tracking errors asymptotically converge to zero, the stability of the system is provedby Lyapunov theory. Finally, the simulation results are provided to demonstrate the effectiveness of the proposedscheme.
Study on the pore/scratch-strength response of ZrB2–SiC ceramic via laser processing
Wang Anzhe,Wang Shuai,Yin Huimin,Zhou Peng,Liu Dazhao 한국세라믹학회 2022 한국세라믹학회지 Vol.59 No.6
Defects, such as pores and scratches, are inevitably introduced during preparation and processing of ceramics. How they aff ect the mechanical properties of materials is worthy of attention. Here, artifi cial surface pores and notches introduced by femtosecond/nanosecond lasers are regarded as inherent pore- and scratch-like defects. Bending test results indicated that a small-sized fl aw with the length and depth of ~ 10 μm could lead to a strength reduction up to ~ 40% in sharp fl aw case, while only slight attenuation (< 10%) occurs in blunt fl aw case. Linear extrapolation result reveals that the maximum strength in notch cases, when the depth reaches the atomic scale, is ~ 34 GPa, which is in the range of the theoretical value of 24–48 GPa. Furthermore, the calculated critical fl aw size ( ac) may tend to be overestimated, given that the artifi cial defect, which is smaller than the ac value, also results in signifi cant strength decay. This study could provide guidance for strength evalu- ation and high-strength design of ceramics.
Shuai Liu,Jie Bai,Qian Wang,Wei Wang 한국항공우주학회 2019 International Journal of Aeronautical and Space Sc Vol.20 No.3
A multi-power reaching law of sliding mode control is applied to aero-engine control, for which the tracking controller is designed based on sliding mode control. An improved multi-power reaching law of sliding mode control is proposed in this paper, which aims at reducing high-frequency oscillation phenomenon appeared in multi-power tracking control process of aero-engine. The proposed reaching law is used in a simulation of an aero-engine control system, whose results show that the proposed reaching law is applicable for tracking control of aero-engine. Not only does the proposed reaching law has these advantages that are fast response speed and strong robustness but also it can inhibit high-frequency oscillation phenomenon. The proposed reaching law is also used in aero-engine controller experiment. The improved multiple reaching law of sliding mode is suitable for tracking control for aero-engine.
Remote control system based on the internet and machine vision for tracked vehicles
Shuai Wang,Shubing Zhang,Ruoding Ma,E. Jin,Xinhui Liu,He Tian,Ruipeng Yang 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.3
A remote control system based on the Internet and machine vision is designed in this study for tracked vehicles. The system consists of remote monitoring, remote control, and visual navigation subsystems. The on-board computer receives control commands issued by the monitoring center and controls the speed and steering angle of the tracked vehicles. The front camera collects navigation line information, and the collected image is processed by filtering, gray processing, binarization processing, and interference elimination to obtain the center point coordinates of the navigation line. Proportional-integral-derivative (PID), fuzzy PID, and neural network control algorithms are compared based on the distance and angle deviations of the preview point to control the operation of tracked vehicles through simulation. The Internet remote control system with the fuzzy PID control algorithm is then tested on a tracked vehicle. Experimental results indicate that the trajectory of the tracked vehicle fits the navigation path well.