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An attention-embedded GAN for SVBRDF recovery from a single image

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Computational Visual Media 2023年第3期9卷 551-561页

作者： Zeqi Shi Xiangyu Lin ying song Zhejiang Sci-Tech University 2011 Collaborative Innovation Center for Garment Personal Customization of Zhejiang ProvinceHangzhou 310018China.

Learning-based approaches have made substantial progress in capturing spatially-varying bidirectional reflectance distribution functions(SVBRDFs)from a single image with unknown lighting and ***,most existing networks only consider per-pixel losses which limit their capability to recover local features such as smooth glossy regions.A few generative adversarial networks use multiple discriminators for different parameter maps,increasing network *** present a novel end-to-end generative adversarial network(GAN)to recover appearance from a single picture of a nearly-flat surface lit by *** use a single unified adversarial framework for each parameter *** attention module guides the network to focus on details of the ***,the SVBRDF map loss is combined to prevent paying excess attention to specular *** demonstrate and evaluate our method on both public datasets and real *** analysis and visual comparisons indicate that our method achieves better results than the state-of-the-art in most cases.

关键词： spatially-varying bidirectional reflectance distribution function(SVBRDF) appearance capture generative adversarial network(GAN) attention mechanism

Peridynamic modeling and simulation of thermo-mechanical de-icing process with modified ice failure criterion

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Defence Technology（防务技术） 2021年第1期17卷 15-35页

作者： ying song Shaofan Li Shuai Zhang College of Shipbuilding Engineering Harbin Engineering UniversityHarbinChina Department of Civil and Environmental Engineering University of CaliforniaBerkeleyUSA

De-icing technology has become an increasingly important subject in numerous applications in recent ***,the direct numerical modeling and simulation the physical process of thermomechanical deicing is *** work is focusing on developing a numerical model and tool to direct simulate the de-icing process in the framework of the coupled thermo-mechanical peridynamics ***,we adopted the fully coupled thermo-mechanical bond-based peridynamics(TM-BB-PD)method for modeling and simulation of *** the framework of TM-BB-PD,the ice constitutive model is established by considering the influence of the temperature difference between two material points,and a modified failure criteria is proposed,which takes into account temperature effect to predict the damage of quasi-brittle ice ***,thermal boundary condition is used to simulate the thermal load in the de-icing *** comparing with the experimental results and the previous reported finite element modeling,our numerical model shows good agreement with the previous *** on the numerical results,we find that the developed method can not only predict crack initiation and propagation in the ice,but also predict the temperature distribution and heat conduction during the de-icing ***,the influence of the temperature for the ice crack growth pattern is discussed *** conclusion,the coupled thermal-mechanical peridynamics formulation with modified failure criterion is capable of providing a modeling tool for engineering applications of de-icing technology.

关键词： Crack growth De-icing Peridynamics Failure criteria Temperature effect Thermal mechanical coupling

Influence of Aging Time on Microstructure and Corrosion Behavior of a Cu-Bearing 17Cr–1Si–0.5Nb Ferritic Heat-Resistant Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2020年第9期33卷 1289-1301页

作者： Tong Zhang ying Han Wen Wang Yang Gao ying song Xu Ran Key Laboratory of Advanced Structural Materials Ministry of EducationChangchun University of TechnologyChangchun 130012China School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi’an 710055China

17 Cr–1 Si–0.5 Nb–1.2 Cu ferritic heat-resistant stainless steel was aged at 750 °C from 10 min to 30 h to simulate time aging and study the microstructural evolution and its effect on corrosion behavior by using optical microscopy, scanning electron microscopy, transmission electron microscopy, potentiodynamic polarization, electrochemical impedance spectroscopy, and the Mott–Schottky approach. Four types of precipitates were discovered, including ε-Cu, NbC, Fe3 Nb3 C, and Fe2 Nb-type Laves phase. The nano-sized ε-Cu phase forms first, and its fraction follows the parabolic law change and is the largest. Compared to NbC and Fe3 Nb3 C particles, the coarsening of the Laves phase is the most pronounced. The aging process is divided into three parts: early-aged(0–5 h), peak-aged(5 h), and over-aged(5–30 h). However, the corrosion resistance is reduced in the early-aged stage of 0–2 h. Further extending the aging time to 30 h, the corrosion resistance is gradually improved. This change may be related to the competitive relationship between the beneficial effects of the Cu-rich phase and the harmful effects of Nb-containing particles. The dissolved Cu on the surface becomes more effective for the suppression of the anodic dissolution by the formation of ionic compounds of chlorine, thereby reducing the deterioration of corrosion resistance caused by Nb-rich precipitation.

关键词： Ferritic stainless steel Aging Precipitation Electrochemical behavior Passive film

The Webster Scalar Curvature and Sharp Upper and Lower Bounds for the First Positive Eigenvalue of the Kohn-Laplacian on Real Hypersurfaces

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Acta Mathematica Sinica,English Series 2018年第8期34卷 1248-1258页

作者： song ying LI Duong Ngoc SON Department of Mathematics University of California Irvine CA 92697-3875 Department of Mathematics Fujian Normal University Fujian 350108 P. R. China Fakultiit fiir Mathematik Universitiit Wien Oskar-Morgenstern-Platz 1 1090 Wien Osterreich

Let （M, θ） be a compact strictly pseudoconvex pseudonermitian manifold winch is CR embedded into a complex space. In an earlier paper, Lin and the authors gave several sharp upper bounds for the first positive eigenvalue λ1 of the Kohn-Laplacian □b on （M, θ）. In the present paper, we give a sharp upper bound for λ1, generalizing and extending some previous results. As a corollary, we obtain a Reilly-type estimate when M is embedded into the standard sphere. In another direction, using a Lichnerowicz-type estimate by Chanillo, Chiu, and Yang and an explicit formula for the Webster scalar curvature, we give a lower bound for λ1 when the pseudohermitian structure θ is volume-normalized.

关键词： CR manifold eigenvalue Kohn-Laplacian Webster curvature

Compact composition operators on BMOA(B_n)

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Science China Mathematics 2009年第12期52卷 2679-2687页

作者： LI song-ying LONG SuJuan Department of Mathematics University of CaliforniaIrvineCA 92697USA School of Mathematics and Computer Science Fujian Normal UniversityFuzhou 350007China

The paper gives some characterization theorems for the compact composition operator on some function spaces over the unit ball B n in ? n . Especially, it gives a characterization for compact composition operators on ... 详细信息

关键词： compactness composition operators BMOA spaces 32A37 47B33

Subfemtosecond X-ray Pulses Produced Directly by High Harmonic Generation

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Chinese Physics Letters 2000年第7期17卷 491-492页

作者： WANG ying-song XU Zhi-Zhan Laboratory for High Intensity Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800

The generation of subfemtosecond pulses in hydrogen-like atoms through high-harmonic generation by using superintense multicycle driver pulses is numerically investigated. It is shown that a single subfemtosecond pulse can be directly generated when the driver pulse is strong enough to deplete the neutral atoms within several optical cycles. The propagation effect is neglected during the numerical examinations.

关键词： femtosecond pulse neglected

Experimental study of evaporation of sessile water droplet on PDMS surfaces

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Acta Mechanica Sinica 2013年第6期29卷 799-805页

作者： ying-song Yu Zi-Qian Wang Ya-Pu Zhao Department of Engineering Mechanics School of Civil Engineering & ArchitectureHubei University of Technology State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of Sciences

Evaporation of sessile water droplet on polydimethylsiloxane （PDMS） surfaces with three different curing ratios （5：1, 10：1, and 20：1） was experimentally investigated in this paper. We show that the constant contact radius （CCR） evaporation on surface with high curing ratio lasts longer than that with low curing ratio. We also measured Young＇s moduli of PDMS films by using atomic force microscopy （AFM） and simulated surface deformation of PDMS films induced by sessile water droplet. With increasing curing ratio of PDMS film, Young＇s modulus of PDMS film is getting lower, and then there will be larger surface deformation and more elastic stored energy. Since such energy acts as a barrier to keep the three-phase contact line pinned, thus it will result in longer CCR evaporation on PDMS surface with higher curing ratio.

关键词： Droplet evaporation PDMS Constant contact radius mode Constant contact angle mode Force- displacement curve Surface deformation Liquid-vapor interfacial tension

Role of routine check-up in the prognosis of patients with pancreatic cancer:A puzzling phenomenon

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Hepatobiliary & Pancreatic Diseases International 2021年第1期20卷 67-73页

作者： Cong-ying song Yan Shen Yuan-Qiang Lu Department of Emergency Medicine the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Department of Geriatric Medicine the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Zhejiang Provincial Key Laboratory for Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Division of Hepatobiliary and Pancreatic Surgery Department of Surgerythe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Background:The high coverage of annual routine health check-up in China is a unique phenomenon throughout the ***,its clinical value is *** this cohort study,we chose pancreatic cancer as a disease model to explore the role of routine check-up in the prognosis of patients with pancreatic ***:Data from 157 patients who were diagnosed with pancreatic cancer between January 2010 and April 2014 were *** were divided into two groups depending on how their disease was *** A(n=85):Patients were diagnosed with pancreatic cancer in clinic *** B(n=72):Patients were diagnosed with pancreatic cancer in routine *** compared their ***:The tumor stage in group B was earlier than that in group *** 1-year survival rate in group B was significantly higher than that in group A(74.6%vs.42.4%,P0.05).The difference of overall survival time between the two groups was not significant(22.0 vs.9.0 months,P=0.078).Conclusions:The stage of pancreatic cancer diagnosed in routine check-ups was earlier and therefore,the intervention was earlier which improved short-term survival ***,early intervention did not improve overall survival in the long-term.

关键词： Pancreatic cancer Routine check-up Early detection Survival rate

Peridynamic Modeling and Simulation of Ice Craters By Impact

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Computer Modeling in Engineering & Sciences 2019年第11期121卷 465-492页

作者： ying song Jiale Yan Shaofan Li Zhuang Kang College of Shipbuilding Engineering Harbin Engineering UniversityHarbin150001China Department of Civil and Environmental Engineering University of CaliforniaBerkeleyCAUSA

In the present work,a state-based peridynamics with adaptive particle refinement is proposed to simulate water ice crater formation due to impact loads.A modified Drucker-Prager constitutive model was adopted to model ice and was implemented in the state-based peridynamic equations to analyze the elastic-plastic deformation of *** simulations,we use the fracture toughness failure criterion in peridynamics to simulate the quasi-brittle failure of *** adaptive particle refinement method in peridynamics was proposed to improve computational *** results obtained using the peridynamic model were compared with the experiments in previous *** was found that the peridynamic simulation results and the experiments matched well except for some minor differences discussed,and the state-based peridynamic model has shown the specific predictive capacity to capture the detailed crater features of the ice.

关键词： Peridynamics ice constitutive model adaptive particle refinement ice craters impact