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Neural-Network-Based Terminal Sliding Mode Control for Frequency Stabilization of Renewable Power Systems

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IEEE/CAA Journal of Automatica Sinica 2018年第3期5卷 706-717页

作者： Dianwei Qian guoliang fan School of Control and Computer Engineering North China Electric Power University Beijing 102206 China Institute of Automation Chinese Academy of Sciences Beijing 100190 China

This paper addresses a terminal sliding mode control(T-SMC) method for load frequency control(LFC) in renewable power systems with generation rate constraints(GRC).A two-area interconnected power system with wind turbines is taken into account for simulation studies. The terminal sliding mode controllers are assigned in each area to achieve the LFC goal. The increasing complexity of the nonlinear power system aggravates the effects of system uncertainties. Radial basis function neural networks(RBF NNs) are designed to approximate the entire uncertainties. The terminal sliding mode controllers and the RBF NNs work in parallel to solve the LFC problem for the renewable power system. Some simulation results illustrate the feasibility and validity of the presented scheme.

关键词： Generation rate constraint(GRC) load frequency control(LFC) radial basis function neural networks(RBF NNs) renewable power system terminal sliding mode control(T-SMC)

Integrated Square Error of Hazard Rate Estimation for Survival Data with Missing Censoring Indicators

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Journal of Systems Science & Complexity 2021年第2期34卷 735-758页

作者： ZOU Yuye fan guoliang ZHANG Riquan School of Economics and Management Shanghai Maritime UniversityShanghai 201306China Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE School of StatisticsEast China Normal UniversityShanghai 200062China

The problem of hazard rate estimation under right-censored assumption has been investigated *** square error(ISE)of estimation is one of the most widely accepted measurements of the global performance for nonparametric kernel *** there are no results available for ISE of hazard rate estimation under right-censored model with censoring indicators missing at random(MAR)so *** paper constructs an imputation estimator of the hazard rate function and establish asymptotic normality of the ISE for the kernel hazard rate estimator with censoring indicators *** the same time,an asymptotic representation of the mean integrated square error(MISE)is also *** finite sample behavior of the estimator is investigated via one simple simulation.

关键词： Asymptotic normality integrated square error missing at random right-censored model

Single-Index Quantile Regression with Left Truncated Data

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Journal of Systems Science & Complexity 2022年第5期35卷 1963-1987页

作者： XU Hongxia fan guoliang LI Jinchang Department of Mathematics Shanghai Maritime UniversityShanghai 201306China School of Data Sciences Zhejiang University of Finance and EconomicsHangzhou 310018China School of Economics and Management Shanghai Maritime UniversityShanghai 201306China

The purpose of this paper is two ***,the authors investigate quantile regression(QR)estimation for single-index QR models when the response is subject to random left *** random weights are introduced to deal with left truncated data and the associated iteration estimation method is *** asymptotic properties for the proposed QR estimates of the index parameter and unknown link function are both ***,by combining the QR loss function and the adaptive LASSO penalization,a variable selection procedure for the index parameter is introduced and its oracle property is ***,a weighted empirical log-likelihood ratio of the index parameter based on the QR method is introduced and is proved to be asymptotic standard chi-square ***,confidence regions of the index parameter can be *** finite sample performance of the proposed methods are demonstrated.A real data analysis is also conducted to show the usefulness of the proposed approaches.

关键词： Adaptive LASSO penalty left truncated data quantile regression single-index model variable selection

Sufficient dimension reduction in the presence of controlling variables

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Science China Mathematics 2022年第9期65卷 1975-1996页

作者： guoliang fan Liping Zhu School of Economics and Management Shanghai Maritime UniversityShanghai 201306China Center for Applied Statistics and Institute of Statistics and Big Data Renmin University of ChinaBeijing 100872China Institute of Statistics and Big Data Zhejiang Gongshang UniversityHangzhou 310018China

We are concerned with partial dimension reduction for the conditional mean function in the presence of controlling *** suggest a profile least squares approach to perform partial dimension reduction for a general class of semi-parametric *** asymptotic properties of the resulting estimates for the central partial mean subspace and the mean function are *** addition,a Wald-type test is proposed to evaluate a linear hypothesis of the central partial mean subspace,and a generalized likelihood ratio test is constructed to check whether the nonparametric mean function has a specific parametric *** tests can be used to evaluate whether there exist interactions between the covariates and the controlling variables,and if any,in what form.A Bayesian information criterion(BIC)-type criterion is applied to determine the structural dimension of the central partial mean *** consistency is also *** studies through simulations and real data examples are conducted to demonstrate the power and utility of the proposed semi-parametric approaches.

关键词： central partial mean subspace controlling variable hypothesis test semi-parametric regression sufficient dimension reduction

Preparation of porous hollow silica spheres via a layer-by- layer process and the chromatographic performance

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Frontiers of Materials Science 2017年第1期11卷 33-41页

作者： Xiaobing WEI Cairong GONG Xujuan CHEN guoliang fan Xinhua XU School of Materials Science and Engineering Tianjin University Tianjin 300350 China Analysis and Testing Center Shandong University of Technology Zibo 255000 China

Hollow silica spheres possessing excellent mechanical properties were successfully prepared through a layer-by-layer process using uniform polystyrene （PS） latex fabricated by dispersion polymerization as template. The formation of hollow SiO2 micro-spheres, structures and properties were observed in detail by zeta potential, SEM, TEM, FTIR, TGA and nitrogen sorption porosimetry. The results indicated that the hollow spheres were uniform with particle diameter of 1.6 μm and shell thickness of 150 nm. The surface area was 511 m2/g and the pore diameter was 8.36 nm. A new stationary phase for HPLC was obtained by using C18-derivatized hollow SiO2 micro-spheres as packing materials and the chromatographic properties were evaluated for the separation of some regular small molecules. The packed column showed low column pressure, high values of efficiency （up to about 43 000 plates/m） and appropriate asymmetry factors.

关键词： PS latex layer-by-layer hollow silica spheres packing materials

Simultaneous Prediction of Retention Times and Peak Shapes of Sulfonamides in Reversed-Phase High-Performance Liquid Chromatography

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Transactions of Tianjin University 2018年第3期24卷 256-262页

作者： Xiaobing Wei Zhengji Pang guoliang fan Xinhua Xu Lihong Wang School of Materials Science and Engineering Tianjin University Department of Applied Chemical Engineering Ningbo Polytechnic School of Agricultural and Food Engineering Shandong University of Technology

In this paper, we propose a novelmethod based on the plate theory to simultaneously predict retention times and peak shapes under gradient elutions and different flow rates by reversed-phase high-performance liquid chromatography. The proposed method yielded excellent retention prediction results in experiments with 16 common sulfonamides under 18 gradient conditions and four different flow rates, including 0.7, 1.0, 1.3, and 1.5 mL/min. The mean absolute deviation was 0.70%, which indicates accurate prediction. Moreover, the proposed method predicts the change wellin peak shapes caused by the expansion or compression ofpeaks under different gradient conditions.

关键词： Retention time Peak shape Prediction RP-HPLC Sulfonamide

The abstract of doctoral dissertation‘nonlinear wavelet density estimation and hazard rate estimation with data missing at random’

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Statistical Theory and Related Fields 2020年第1期4卷 117-119页

作者： Yuye Zou guoliang fan Riquan Zhang School of Economics and Management Shanghai Maritime UniversityShanghaiPeople’s Republic of China Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE School of StatisticsEast China Normal UniversityShanghaiPeople’s Republic of China

In this thesis,we establish non-linear wavelet density estimators and studying the asymptotic properties of the estimators with data missing at random when covariates are *** outstanding advantage of non-linear wavelet method is estimating the unsoothed functions,however,the classical kernel estimation cannot do this *** the same time,we study the larger sample properties of the ISE for hazard rate estimator.

关键词： Asymptotic normality integral square error mean integral square error missing at random non-linear wavelet

Influence of age on prevalence rates of chronic complications of hospitalized aged patients with hypertension -- analysis of 17,682 cases

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Journal of Geriatric Cardiology 2009年第2期6卷 91-94页

作者： Hua Cui Yixin Hu Li fan guoliang Hu Wei Dai The second department of the Geriatric Cardiology Chinese PLA General Hospital Beijing 100853China

Objective To understand the relationship between age and chronic complications in hospitalized aged patients with hypertension, to provide evidence for hypertension prevention and control. Methods To retrospectively analyze the clinical and laboratory data on 17,682 patients with essential hypertension during Jan 1 s,, 1993-Dec 12th, 2008 in PLA general hospital. Results 1） Among all of the inrolled cases, those aged 60-64 account for 27.87%, 65-69 years group account for 26.55%, 70-74 years group accounted for 23.96%, 75-79 years group accounted for 14.14%, 80-84 years group accounted for 5.26%, 85-89 years group accounted for 1.69%, 〉 90 years accounted for 0.41%. 2） The prevalence rate of chronic complications in 60-69 years group were 31.3-31.2% for diabetes and,22.6-27.0% for cerebrovascular disease, 9.5-11.1% for myocardial infarction, 6.7-9.1% for heart failure, 5.8-6.0% for renal dysfanction 4.9-6.8% for atrial fibrillation, 0.1-0.3% for multiple organ dysfunction syndrome （MODS） in the elderly（P 〈0.05 ）. 3） The first four complications of hypertension were diabetes（33.5%）, cerebrovascular disease （31.9%）, myocardial infarction（13.2%） and heart failure（12.3%） in 70-74 years group （P〈0.05）, cerebrovascular disease （42.8%）, diabetes （32.8%）, heart failure （16.5%） and myocardial infarction（15.9%） in 75-79 years group （P〈0.05）, cerebrovascular disease （45.4%）, diabetes （35.0%）, heart failure （21.1%） and myocardial infarction（l 5.9%） in 80-84 years group （P〈0.05）, cerebrovascular disease（42.5%）, diabetes （35.8%）, heart failure （23.1%） and renal dysfanction （17.7%） in 85-89 years group（P〈0.05 ）,and cerebrovascular disease （45. 2%）, heart failure（31.5%） , diabetes （26.0%） and renal dysfanction （20.5%） in patients more than 90 years group （P〈0.05）. Conclusions The prevalence rate and kinds of chronic complications in hospitalized aged patients with hypertension were changed with the increasing age, and the first kind of complication is cerebrovascular disease. It is

关键词： Hypertension stroke myocardial infarction outcome

Properties of La_(1−x)Ce_(x)CoO_(3) system perovskite-type catalysts for diesel engine exhaust removal

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Frontiers of Chemical Science and Engineering 2007年第1期1卷 6-10页

作者： GONG Cairong fan guoliang HOU Yanfeng SONG Chonglin HUANG Qifei ZHANG Zhongrong School of Material Science and Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Engine School of Mechanical EngineeringTianjin UniversityTianjin 300072China

A series of complex oxide La_(1−x)Ce_(x)CoO_(3) catalysts was synthesized at a low temperature through a combustion process,in which x is among 0,0.1,0.2,0.4 and 0.6 corre-sponding to the quantity of La3+partial substitution by Ce^(4+).The catalysts were characterized for phase composition using chemical analysis and X-ray *** catalytic activity of the catalysts in removal of NOx,total hydrocarbon(THC)and particulate matter(PM)from diesel exhaust gases were examined in detail using temperature-programmed reaction *** results show that after partial substitution of La^(3+)with Ce^(4+),the oxygen vacancy concentration increases significantly and a Co^(3+)-Co^(2+)system is ***,the catalytic activity in the removal of THC and NOx is significantly *** for the PM,the effect is not so *** possible catalytic mechanism for this was *** is also worth noting that the doped catalysts showed good stability.

关键词： perovskite catalysis diesel engine doped