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J. Cent. South Univ. Technol. (2011) 18: 755-759 DOI: 10.1007/s11771-011-0759-6 Amplitude phase control for electro-hydraulic servo system based on normalized least-mean-square adaptive filtering... system was studied to cancel the amplitude attenuation and phase delay of its sinusoidal response, by developing a network using normalized least-mean-square (LMS) adaptive filtering algorithm......
and Ti/TiN multilayer film were carried out under normal load of 20 N and various displacement amplitudes ranging from 5 to 100 μm. With the increase of the displacement amplitude, the fretting changed from partial slip regime (PSR) to slip regime (SR). The coefficient of friction (COF) increased with the increase of displacement amplitude. The results indicated that the displacement amplitude had......
J. Cent. South Univ. Technol. (2011) 18: 1614-1618 DOI: 10.1007/s11771-011-0880-6 Nonlinear correction of photoelectric displacement sensor based on least square support vector machine GUO Jie... displacement sensor was established based on the least square support vector machine. The parameters of the correcting nonlinear model, such as penalty factor and kernel parameter, were optimized by chaos......
. The displacement resonance will disappear when the total quality factor QT of the speaker system is less than 0.707. At this time, when constant amplitude pure tone signals drive, the lower...; 文章编号:1672-7207(2013)12-4930-06 Displacement-resonance and velocity-resonance of loudspeaker ZHANG Pingke (Department of Mathematics and Physics, Hunan First......
. 图5 水库月位移变幅 Fig. 5 Variation amplitude of monthly displacement 基于以上分析,得到了周期性位移的6个影响因素,根据灰色关联度理论,当分辨系数取0.5,若各影响因子与周期性位移的关联度rk>0.6,则可认为两者密切相关[20].各影响因子与周期性位移的灰色关联度如表2所示,可见:本文选取的6个影响因素的关联度均大...; 文章编号:1672-7207(2019)03-0619-08 Displacement prediction model of landslide based on time series and GWO-ELM LIAO Kang, WU Yiping, LI Linwei, MIAO Fasheng, XUE Yang (Faculty......
J. Cent. South Univ. (2020) 27: 531-541 DOI: https://doi.org/10.1007/s11771-020-4314-1 Water invasion and remaining gas distribution in carbonate gas reservoirs using core displacement and NMR GUO... exploitation obstacles and low recovery factors. In this study, combined core displacement and nuclear magnetic resonance (NMR) experiments explored the reservoir gas-water two-phase flow and remaining......
;频率;振幅 中图分类号:TB34,TB123 文献标志码:A Magnetostriction and amplitude-frequency characteristics of cantilever beam structure Sm-Fe GMFs ZHOU Bai-yang, LEI De-hui (College... substrate. The deflection of cantilever beam end and the amplitude-frequency characteristic for the as-deposited film and the films after vacuum annealing treatment at different temperatures were......
Fatigue Properties of RPC under Cyclic Loads of Single-stage and Multi-level Amplitude安明喆School of Civil Engineeringss,Beijing Jiaotong University摘 要:Fatigue properties of Reactive Powder Concrete (RPC) under axial compression of single-stage and multi-level amplitude in cycles were studied. The tests reveal the fatigue life, the strain and residual......
Slope displacement prediction based on morphological filteringLI Qi-yue(李启月), XU Jie(许杰), WANG Wei-hua(王卫华), FAN Zuo-peng(范作鹏)(School of Resources and Safety Engineering, Central South University, Changsha 410083, China)Abstract:Combining mathematical morphology (MM), nonparametric and nonlinear model, a novel approach for predicting slope displacement was developed to improve the prediction......
. The displacement Green’s function for case 2 due to the unit patch-load in the z-direction at the interface is delineated in Figure 13. Figure 22 Amplitude of along z-axis for Case 1, Case 2, and Case 3 due to unit patch-load applied at interface Figure 23 Amplitude of along z-axis for Case 1, Case 2, and Case 3 due to unit patch-load applied at surface The displacement Green’s functions......