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Fiber soliton-form 3R regenerator and its performance analysis

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Science in China(Series F) 2007年第2期50卷 241-250页

作者： ZHU Bo yang xianglin Department of Optical Information Technology Nanjing University of Posts and Telecommunications Nanjing 210003 China

A novel fiber optical 3R regenerator based on optical soliton-effect using highly nonlinear fiber is constructed and investigated for the needs of the high rate and long-haul optical communications. The propagation equation of the pulses in the proposed optical 3R regenerator with the control of optical modulator and filter is established. By the use of the variational approach, the evolution of the distorted optical pulses in the regenerator and the functions of reamplification, reshaping, and reUming are investigated. The relation between the construction parameters and the output performance of the regenerator is discussed. The stable operation condition of the regenerator is revealed.

关键词： optical regenerator optical soliton high nonlinear fiber optical amplitude modulation analysis of stability

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Improved IAMB with Expanded Markov Blanket for High-Dimensional Time Series Prediction

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Chinese Journal of Electronics 2016年第2期25卷 264-269页

作者： yang xianglin TONG Yunhai yang Jianjun YAN Hong WANG Hongbo TAN Shaohua Key Laboratory of Machine Perception (Ministry of Education) School of Electronics Engineering and Computer SciencePeking University State Key Laboratory of Space Medicine Fundamentals and Application China Astronaut Research and Training Center

The classic regression model for multivariate time series prediction suffers from the curse of dimensionality because the least squares estimates become unreliable when the predictors of the time series are large and the number of samples is limited. The classic methods such as ridge regression, lasso regression, principal component regression are researched to solve the problem above. The ridge regression and principal component regression can not give the clear interpretation features for prediction,and lasso regression does not work well under collinearity, also the selections given by lasso regression are unstable and very sensitive to minor perturbations of the data.A practical method based on improved Incremental association Markov blanket(IAMB) with Expanded Markov blanket(EMB) was proposed for high-dimensional time series prediction. The EMB was constructed with simultaneous predictors and past predictors for time series. Since the faithfulness condition and reliable conditional independence test are not satisfied for high-dimensional time series with limited samples in practical applications. The symmetry of Markov blanket(MB) and the partial correlation coefficient criterion for conditional independent test were employed to learn the EMB, on which the regression was used for prediction. Empirical results show that our method based on EMB for macroeconomic prediction has less mean-square forecast error than other classic methods,especially when predicting the value with sharp fluctuation.

关键词： Expanded Markov blanket(EMB) High-dimensional time series Incremental association Markov blanket(IAMB) Prediction Regression

A comparative investigation into floatability of bastnaesite with three di/trialkyl phosphate surfactants

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Journal of Rare Earths 2021年第11期39卷 1442-1449,I0005页

作者： Hongli Fan xianglin yang Jing Qi Guangyi Liu Jingqin Qin College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

Flotation separation and recovery of rare earth minerals(REM) have returned to an important position due to the growing strategy demand for rare earth elements(REE).In this paper,a comparative investigation into the floatability of bastnaesite((Ce,La)FCO3) was conducted by using three di/trialkyl phosphate collectors,di(2-ethylhexyl) phosphate(DEHPA),dibutyl phosphate(DBP) and tributyl phosphate(TBP).The density functional theory(DFT) computation recommends that the chemical activity of the three phosphate collectors is in order of DEHPA≥ DBP >> TBP,and their hydrophobization assuggested by the IgP(oil-water partition coefficient) value is in the order of DEHPA> TBP> *** micro-flotation indicates that the preferable pH values for flotation of bastnaesite with the three phosphate collectors are 7.0-8.0,and DEHPA achieves much higher flotation recovery of bastnaesite,followed by DBP,and then TBP,which coincides with their reactivity and hydrophobicity,the two prerequisites for froth *** contact angle,zeta potential,Fourier transform infrared spectroscopy(FTIR) and X-ray photoelectron spectroscopy(XPS) deduce that DEHPA likely reacts with the Ce(Ⅲ)atoms of bastnaesite interface through its O atom(s) of the P(=O)-O-group to generate the Ce-O-P bonds,and its two 2-ethylhexyl groups orient outside for attaching bubbles,resulting in flotation enrichment of ***,this investigation offers a novel strategy for developing collectors in selective beneficiation of REM.

关键词： di(2-ethylhexyl)phosphoric acid Bastnaesite Flotation Mechanism Activity Rare earths

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New Method to Increase the Parameter Detection Sensitivity of Ultrashort Optical Pulse

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Chinese Physics Letters 1994年第9期11卷 548-550页

作者： YU Hong ZHANG Mingde MAO Qinghe DIN Dong yang xianglin Department of Electronic Engineering Southeastern UniversityNanjing 210018

An autocorrelation system by second harmonic generation with organic crystal POM is *** optical pulses produced by a 1.55μm gain-switching distributed feedback laser diode have been measured and the detection sensiti... 详细信息

关键词： autocorrelation diode system

Derrick Safety Monitoring System Based on Fiber Bragg Grating Strain Sensors

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Photonic Sensors 2013年第3期3卷 237-240页

作者： yang CHENG xianglin LU Yuan GONG Yu WU Yunjiang RAO Key Laboratory of Optical Fiber Sensing & Communications (Ministry of Education) University of Electronic Science and Technology of China Chengdu 611731 China

The fiber Bragg grating （FBG） strain sensor is used in the oil and gas derricks for the health monitoring. The system consisted of the FBG strain sensors, optical interrogator and monitoring software. 64 sensors were installed on a derrick for loading and unloading tests. The results showed that the monitoring system had the advantages of the high accuracy, good repeatability, large capacity and real-time monitoring ability.

关键词： Fiber Bragg grating Derrick strain monitor

Influence　on　Transmission　Properties　of　Solitons　by　Stochastic　Variation　of　System　Parameters　and　Interaction

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Chinese Journal of Lasers 1996年第5期B5卷 423-428页

作者： CHEN Minghua WEN yangjin yang xianglin (Southeast University, No. 2 sipailou, Nanjing 210096, China) Southeast Univ Nanjing China

ＩｎｆｌｕｅｎｃｅｏｎＴｒａｎｓｍｉｓｓｉｏｎＰｒｏｐｅｒｔｉｅｓｏｆＳｏｌｉｔｏｎｓｂｙＳｔｏｃｈａｓｔｉｃＶａｒｉａｔｉｏｎｏｆＳｙｓｔｅｍＰａｒａｍｅｔｅｒｓａｎｄＩｎｔｅｒａｃｔｉｏｎＣＨＥＮＭｉｎｇｈｕａ；... 详细信息

ＩｎｆｌｕｅｎｃｅｏｎＴｒａｎｓｍｉｓｓｉｏｎＰｒｏｐｅｒｔｉｅｓｏｆＳｏｌｉｔｏｎｓｂｙＳｔｏｃｈａｓｔｉｃＶａｒｉａｔｉｏｎｏｆＳｙｓｔｅｍＰａｒａｍｅｔｅｒｓａｎｄＩｎｔｅｒａｃｔｉｏｎＣＨＥＮＭｉｎｇｈｕａ；ＷＥＮＹａｎｇｊｉｎ；ＹＡＮＧＸｉ...

关键词： soliton transmission property fiber stochastic variation

The influence of higher-order effects on the transmission performances of the ultra-short soliton pulses and its suppression method

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Science China(Information Sciences) 2010年第1期53卷 182-190页

作者： ZHU Bo & yang xianglin Institute of Optical Communication, Nanjing University of Posts and Telecommunications, Nanjing 210003, China 1. Institute of Optical Communication Nanjing University of Posts and Telecommunications Nanjing 210003 China

Under the condition of the higher order effects, a propagation equation is established to investigate the way to suppress the soliton self frequency shift and timing jitter in the picosecond and femtosecond soliton communication system using a combined control method of time domain and frequency domain. By the use of the variational approach, the evolution of the chirping Gaussian quasi-soliton pulse is analyzed in the presence of the effects including third order dispersion, intrapulse Raman scattering (IRS), and self steepening. Considering the soliton evolution properties and the mechanism of the timing jitter under the higher-order effects, the combined control method is adopted to eliminate the influence from Raman scattering and self-steepening. The soliton central frequency is stabilized and the timing jitter is suppressed effectively. A 160 Gb/s long-haul soliton transmission system is designed and its performance is numerically simulated. The simulation results are in good agreement with our theoretical analysis.

关键词： high rate soliton communication higher-order nonlinearity Raman self-frequency shift transmission control stable transmission

The Fiber Soliton Communication System with Stochastic Variation of Gain

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Chinese Journal of Lasers 1995年第3期B4卷 241-246页

作者： WEN yangjing CHEN Minghua ZHANG Mingde yang xianglin(Department of Electronics Engeneering, Southeast University, Nanjing 210096, China) Southeast Univ Nanjing China

ＴｈｅＦｉｂｅｒＳｏｌｉｔｏｎＣｏｍｍｕｎｉｃａｔｉｏｎＳｙｓｔｅｍｗｉｔｈＳｔｏｃｈａｓｔｉｃＶａｒｉａｔｉｏｎｏｆＧａｉｎ￥ＷＥＮＹａｎｇｊｉｎｇ；ＣＨＥＮＭｉｎｇｈｕａ；ＺＨＡＮＧＭｉｎｇｄｅ；ＹＡＮＧＸｉａｎ... 详细信息

ＴｈｅＦｉｂｅｒＳｏｌｉｔｏｎＣｏｍｍｕｎｉｃａｔｉｏｎＳｙｓｔｅｍｗｉｔｈＳｔｏｃｈａｓｔｉｃＶａｒｉａｔｉｏｎｏｆＧａｉｎ￥ＷＥＮＹａｎｇｊｉｎｇ；ＣＨＥＮＭｉｎｇｈｕａ；ＺＨＡＮＧＭｉｎｇｄｅ；ＹＡＮＧＸｉａｎｇｌｉｎ（Ｄｅｐａｒｔｍｅｎｔｏｆ...

关键词： optical soliton stochastic gain soilton communication system

Effect of Kerosene Flowing Rate on Microstructure and Wearing Properties for Fe-based Amorphous Coatings

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1128-1134页

作者： yang xianglin WANG Shanlin GONG Yubing CHEN Yuhua WANG Shuaixing WU Jisi Jiangxi Key Laboratory of Forming and Joining Technology for Aerospace Components Nanchang Hangkong UniversityNanchang 330036China

The effects of kerosene flow rate on the microstructure and wearing properties were investigated for Fe-based amorphous coatings sprayed by High Velocity Oxygen Fuel (HVOF).The microstructures and wearing properties of the Fe-based amorphous coatings were analyzed with scanning electron microscope (SEM),X-ray diffraction analyzer (XRD),and ball-on-disc tribometer (CFT-1),*** experimental results show that the well interfacial bonding can be observed between the amorphous coating layer and the substrate,and the porosity in amorphous coating layer is less to 1%.Only some crystalline a-Fe and FeO phases can be detected by XRD in the amorphous coatings,while the amorphous content is up to 99.4%.The wearing coefficient is near to 0.15,which is superior to SUS316 of *** the increasing of wearing loads,the failure mode is changed from oxidation wear to the composite of oxidation and abrasive wear.

关键词： Fe-based amorphous coatings HVOF kerosene flow wear resistance

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