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An Alternating Direction Method of Multipliers for Inverse Lithography Problem

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Numerical Mathematics(Theory,Methods and Applications) 2023年第3期16卷 820-846页

作者： Junqing Chen haibo liu Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

We propose an alternating direction method of multipliers(ADMM)to solve an optimization problem stemming from inverse *** objective functional of the optimization problem includes three terms:the misfit between the imaging on wafer and the target pattern,the penalty term which ensures the mask is binary and the total variation regularization *** variable splitting,we introduce an augmented Lagrangian for the original objective *** the framework of ADMM method,the optimization problem is divided into several *** of the subproblems can be solved *** give the convergence analysis of the proposed ***,instead of solving the subproblem concerning sigmoid,we solve directly the threshold truncation imaging function which can be solved *** also provide many numerical examples to illustrate the effectiveness of the method.

关键词： Inverse lithography techniques ADMM framework total variation regularization

Learning the external and internal priors for multispectral and hyperspectral image fusion

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Science China(Information Sciences) 2023年第4期66卷 64-78页

作者： Shutao LI Renwei DIAN haibo liu College of Electrical and Information Engineering Hunan University School of Robotics Hunan University

Recently, multispectral image(MSI) and hyperspectral image(HSI) fusion has been a popular topic in high-resolution HSI acquisition. This fusion leads to a challenging underdetermined problem, which image priors are used to regularize, aiming at improving fusion accuracy. To fully exploit HSI priors, this paper proposes two kinds of priors, i.e., external priors and internal priors, to regularize the fusion *** external prior represents the general image characteristics and is learned from abundant training data by using a Gaussian denoising convolutional neural network(CNN) trained in the additional gray images. An internal prior represents the unique characteristics of the HSI and MSI to be fused. To learn the external prior, we first segment the MSI into several superpixels and then enforce a low-rank constraint for each superpixel, which can well model local similarities in the HSI. In addition, to model a low-rank property in the spectral mode, the high-resolution HSI is decomposed into a low-rank spectral basis and ***, we formulate the fusion as an external and internal prior-regularized optimization problem, which is efficiently tackled through the alternating direction method of multipliers. Experiments on simulated and real datasets demonstrate the superiority of the proposed method.

关键词： multispectral and hyperspectral image fusion external and internal prior learning high-resolution hyperspectral imaging

Complete Weight Enumerator for a Class of Linear Codes from Defining Sets and Their Applications

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Journal of Systems Science & Complexity 2019年第3期32卷 947-969页

作者： liu haibo LIAO Qunying WANG Xiaofeng 不详 Institute of Mathematics and Software Science Sichuan Normal University College of Mathematics and Statistics Shenzhen University

Recently, linear codes over finite fields with a few weights have been extensively studied due to their applications in secret sharing schemes, authentication codes, constant composition codes. In this paper, for an odd prime p,the complete weight enumerator of a class of p-ary linear codes based on defining sets are determined. Furthermore, from the explicit complete weight enumerator of linear codes, a new class of optimal constant composition codes and several classes of asymptotically optimal systematic authentication codes are obtained.

关键词： Authentication codes complete weight enumerator constant composition codes exponential sums linear codes secret sharing schemes weight distributions

Attitude control for QTR using exponential nonsingular terminal sliding mode control

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Journal of Systems Engineering and Electronics 2019年第1期30卷 191-200页

作者： liu haibo WANG Heping SUN Junlei College of Aeronautics Northwestern Polytechnical University Shenzhen Research Institute of Northwestern Polytechnical University

For the problem of attitude control of a quad tilt rotor aircraft with unknown external disturbances, a class of control methods based on a new exponential fast nonsingular terminal sliding surface, a new fast reaching law, and a super twisting sliding mode disturbance observer is investigated. First, the new exponential nonsingular terminal sliding surface is designed by using the advantages of nonsingular terminal sliding mode finite time convergence and strong robustness. Second, to solve the problem of a long convergence time and the serious shaking of the traditional reaching law, a new fast reaching law model with characteristics of the second-order sliding mode is put forward. Third,considering the existence of complex disturbances, the super twisting sliding mode disturbance observer is used to estimate and compensate the composite disturbances online. Finally, compared with the traditional nonsingular fast sliding mode control, simulation results show that the proposed control scheme achieves a good control performance.

关键词： tilt rotor exponential sliding mode control reaching law super twisting.

Rapid hydrate formation and efficient gas separation based on aqueous solid carrier

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Chinese Journal of Chemical Engineering 2024年第10期74卷 127-132页

作者： haibo liu Qiang Sun Xiaodong liu Du Sun Guangjin Chen China Oilfield Services Limited Sanhe 065201China State Key Laboratory of Heavy Oil Processing China University of Petroleum-BeijingBeijing 102249China Tarim Oilfield Branch of China National Petroleum Corporation Korla 841000China

The long hydrate induction time and limited gas-liquid contact area leads to slow hydrate formation rate and low water-hydrate conversion *** media are often used to promote hydrate formation because of their large specific surface ***,we used 3A molecular sieve as a water-carrying solid in this work,and investigated the dynamic renewal of the gas-liquid interface and its effect on hydrate *** formation kinetics of ethane hydrate was first measured in an aqueous molecular sieve *** the separation of(H_(2)+CH_(4)+C_(2)H_(6)+C_(3)H_(8))gas mixture was conducted via hydrate *** results show that the formation rate and gas storage capacity of ethane hydrate can be greatly improved by using aqueous molecular *** with a pure water system under the same temperature and pressure,aqueous molecular sieve has obvious advantages in separation effect and energy consumption for separating gas mixtures.

关键词： Hydrate Formation kinetics Gas storage capacity Gas separation Aqueous molecular sieve

PSO-BP-Based Optimal Allocation Model for Complementary Generation Capacity of the Photovoltaic Power Station

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Energy Engineering 2023年第7期120卷 1717-1727页

作者： Zhenfang liu haibo liu Dongmei Zhang Department of Electrical Automation Hebei University ofWater Resources and Electric EngineeringHebei UniversityWater Conservancy Automation and Informatization Application Technology Research and Development CenterCangzhou061001China

To improve the operation efficiency of the photovoltaic power station complementary power generation system,an optimal allocation model of the photovoltaic power station complementary power generation capacity based on PSO-BP is *** Swarm Optimization and BP neural network are used to establish the forecasting model,the Markov chain model is used to correct the forecasting error of the model,and the weighted fitting method is used to forecast the annual load curve,to complete the optimal allocation of complementary generating capacity of photovoltaic power *** experimental results show that thismethod reduces the average loss of photovoltaic output prediction,improves the prediction accuracy and recall rate of photovoltaic output prediction,and ensures the effective operation of the power system.

关键词： Photovoltaic power station complementary power generation capacity optimization resource allocation

Surface Quality Improvement in Machining an Aluminum Honeycomb by Ice Fixation

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Chinese Journal of Mechanical Engineering 2020年第1期33卷 162-169页

作者： Yongqing Wang Yongquan Gan haibo liu Lingsheng Han Jinyu Wang Kuo liu Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education Dalian University of TechnologyDalian 116024China

A honeycomb structure is widely used in sandwich structure components in aeronautics and astronautics;however,machining is required to reveal some of its *** honeycomb structures,deficiencies,such as burrs,edge subsiding,and cracking,can easily appear,owing to poor specific sti ness in the radial *** e ective fixation methods based on a filling principle have been applied by researchers,including approaches based on wax,polyethylene glycol,iron powder,and(especially)***,few studies have addressed the optimization of the cutting *** study focused on optimizing the cutting parameters to obtain a better surface roughness(calculated as a roughness average or Ra)and surface morphology in the machining of an aluminum alloy honeycomb by an ice fixation method.A Taguchi method and an analysis of variance were used to analyze the e ects and contributions of spindle speed,cutting depth,and feed *** optimal cutting parameters were determined using the signal-to-noise ratio combined with the surface *** F-value and P-value were calculated for the value of the Ra,according to a"smaller is better"***,the optimum cutting parameters for machining the aluminum honeycomb by ice fixation were found at different *** results of this study showed that the optimal parameters were a feed rate of 50 mm/min,cutting depth of 1.2 mm,and spindle speed of 4000 r/*** rate was the most significant factor for minimizing Ra and improving the surface morphology,followed by spindle *** cutting depth had little e ect on Ra and surface *** optimization,the value of Ra could reach 0.218μm,and no surface morphology deterioration was observed in the verified ***,this research proposes optimal parameters based on ice fixation for improving the surface quality.

关键词： Honeycomb Ice fixation Cryogenic milling Surface roughness Surface morphology Optimal parameters

Hull deformation measurement for spacecraft TT&C ship by Photogrammetry

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Science China(Technological Sciences) 2015年第8期58卷 1339-1347页

作者： liu haibo SUN Cong ZHANG YueQiang liu XinMing liu JinBo ZHANG XiaoHu YU QiFeng College of Aerospace Science and Engineering National University of Defense Technology Hunan Provincial Key Laboratory of Image Measurement and Vision Navigation China Satellite Maritime Tracking and Control Department

When voyaging,ships are subject to inevitable hull deformations caused by the changes in the environmental temperature and external *** are a crucial source of errors when measuring data using a spacecraft tracking,telemetry,and control(TT&C) ship.A prototype system based on photogrammetry was developed for the real-time measurement of a spacecraft TT&C ship's hull *** system has high accuracy,a simple structure,and convenient maintenance,and requires few changes to the ship's *** improve its performance,an estimation approach is proposed for hull deformation *** the proposed approach,the central positions of cross spots in successive frames can be predicted based on the prediction of the camera's attitude,and their extract locations can be found by defining a series of small windows around each predictive ***,the optimal estimate of the camera's attitude is updated by the designed extended Kalman filter using the extracted cross spots and their corresponding local coordinates,with which the hull deformation angles can be *** verify the proposed measurement approach,its performance was tested during the normal sailing,floating,and rocking on the sea of a spacecraft TT&C *** experimental testing results demonstrated that the proposed approach performs well in terms of accuracy and *** can satisfy the hull deformation measurement requirement for a spacecraft TT&C ship in real time.

关键词： photogrammetry ship deformation spacecraft TT&C ship EKF

A new complex Duffing oscillator used in complex signal detection

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Chinese Science Bulletin 2012年第17期57卷 2185-2191页

作者： DENG XlaoYing liu haibo LONG Teng School of in formation and Electronics Beijing Institute of TechnologyBeijing 100081China

In view of the fact that complex signals are often used in the digital processing of certain systems such as digital communication and radar systems,a new complex Duffing equation is *** addition,the dynamical behaviors are *** calculating the maximal Lyapunov exponent and power spectrum,we prove that the proposed complex differential equation has a chaotic solution or a large-scale periodic one depending on different *** on the proposed equation,we present a complex chaotic oscillator detection system of the Duffing *** a dynamic system is sensitive to the initial conditions and highly immune to complex white Gaussian noise,so it can be used to detect a weak complex signal against a background of strong *** of the Monte-Carlo simulation show that the proposed detection system can effectively detect complex single frequency signals and linear frequency modulation signals with a guaranteed low false alarm rate.

关键词：信号检测 Duffing方程振荡器 Lyapunov 复域雷达系统线性调频信号检测系统