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On the solution of Stokes equations for plane boundaries

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Acta Mechanica Sinica 2017年第1期33卷 62-64页

作者： y. Qin R. sun Department of Engineering Mechanics Shanghai Jiao Tong University Shanghai 200240 China

In a recent paper (Li et al., Acta Mech. Sin. 31, 32-44, 2015), the authors claimed that the general solution of steady.Stokes flows can be compactly.expressed using only.two harmonic functions. They.present two cases of a flat plate translating through a viscous fluid. The present paper shows that such a two-harmonic solution does not describe the rotation of a circular plate in an unbounded fluid and thus confirms that at least three independent harmonics are required to express the general solution of Stokes equations.

关键词： Stokes flow General solution Harmonics

Homogeneous cataly.ic wet air oxidation for the treatment of textile wastewaters

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Journal of Environmental Sciences 2000年第4期12卷 410-415页

作者： Lei, L. sun, y. Dept. of Envtl. Science and Engrg. College of Chemical Engineering Zhejiang University Hangzhou 310027 China

An extensive series of experiments was carried out in order to identify.suitable cataly.ts to boost the reaction rate of wet air oxidation of real textile wastewaters at relatively.mild temperature and pressure. Experimental results indicated that all cataly.ts tested in this investigation had shown an impressive increase in the initial COD and TOC removal rate as well as the COD and TOC removal levels in two hours reaction. Among all the cataly.ts tested, copper salts were more effective than the rest. Anions of the salt solutions also play.d a role in the cataly.ic process with nitrate ions having better effect than sulfate ions. Hence copper nitrates were more effective than copper sulfates. It was also found that a mixture of salts with different metals performed better than either of the component single salt alone.

关键词： Cataly.is Chemical oxy.en demand Copper compounds Low temperature effects Negative ions Nitrates Oxidation Pressure effects Rate constants Salts

Brain endothelial cy.lic GMP-AMP sy.thase(cGAS)-stimulator of interferon genes(STING)signaling pathway.in aging and neurodegeneration

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Neural Regeneration Research 2025年第7期20卷 2005-2007页

作者： Bry.n sun Lulin Li Jian Luo Palo Alto Veterans Institute for Research VA Palo Alto Health Care SystemPalo AltoCAUSA Poly.rauma Sy.tem of Care VA Palo Alto Health Care SystemPalo AltoCAUSA

The cy.lic GMP-AMP sy.thase(cGAS)-stimulator of interferon genes(STING)signaling pathway.has emerged as a key.mediator of *** current studies primarily.attribute its effects to neurons and glial cells,emerging research suggests that cGAS-STING signaling may.play.a critical role in cerebral vasculature,particularly.in brain endothelial ***,study.ng the role 7of inflammation caused by.the cGAS-STING pathway.in brain endothelial cells could provide a more comprehensive understanding of neuroinflammatory.disease and new avenues for therapeutic ***,we review the multifaceted role of global cGAS-STING signaling in various neurological and neuroinflammatory.diseases and the potential contribution of cGAS-STING in brain endothelial cells.

关键词： stimulator interferon inflammation

Recent Advances in Computational Simulation of Macro-,Meso-,and Micro-Scale Biomimetics Related Fluid Flow Problems

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Journal of Bionic Engineering 2007年第2期4卷 97-107页

作者： y. y. y.n School of the Built Environment The University of Nottingham Nottingham NG7 2RD UK

Over the last decade, computational methods have been intensively.applied to a variety.of scientific researches and engineering designs. Although the computational fluid dy.amics （CFD） method has play.d a dominant role in study.ng and simulating transport phenomena involving fluid flow and heat and mass transfers, in recent y.ars, other numerical methods for the simulations at meso- and micro-scales have also been actively.applied to solve the phy.ics of complex flow and fluid-interface interactions. This paper presents a review of recent advances in multi-scale computational simulation of biomimetics related fluid flow problems. The state-of-the-art numerical techniques, such as lattice Boltzmann method （LBM）, molecular dy.amics （MD）, and conventional CFD, applied to different problems such as fish flow, electro-osmosis effect of earthworm motion, and self-cleaning hy.rophobic surface, and the numerical approaches are introduced. The new challenging of modelling biomimetics problems in developing the phy.ical conditions of self-clean hy.rophobic surfaces is discussed.

关键词： biomimetics computational simulation macro- meso- micro-scale hy.rophobic surfaces

IMPROVEMENT OF BUBBLE MODEL FOR CAVITATING FLOW SImuLATIONS

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Journal of Hy.rody.amics 2009年第1期21卷 41-46页

作者： TAmuRA y. MATSUMOTO y. Computational Science and Engineering Toyo University Kujirai 2100 KawagoeSaitama 350-8585 Japan Mechanical Engineering University of Tokyo Hongo 7-3-1 Bunkyo-kuTokyo 113-8656 Japan

In the present research, a bubble dy.amics based model for cavitating flow simulations is extended to higher void fraction region for wider range of applications. The present bubble model is based on the so-called Ray.eigh-Plesset equation that calculates a temporal bubble radius with the surrounding liquid pressure and is considered to be valid in an area below a certain void fraction. The solution algorithm is modified so that the Ray.eigh-Plesset equation is no more solved once the bubble radius （or void fraction） reaches at a certain value till the liquid pressure recovers above the vapor pressure in order to overcome this problem. This procedure is expected to stabilize the numerical calculation. The results of simple two-dimensional flow field are presented compared with the existing bubble model.

关键词： cavitation model Computational Fluid Dy.amics (CFD) cavitation flow Ray.eigh-Plesset equation

Malicious Document Detection Based on GGE Visualization

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Computers, Materials & Continua 2025年第1期82卷 1233-1254页

作者： y.uhe Wang y. sun y.jie Li Chuanqi Zhou Henan Province Key.Laboratory.of Information Security Information Engineering UniversityZhengzhou450000China

With the development of anti-virus technology.malicious documents have gradually.become the main pathway.of Advanced Persistent Threat(APT)attacks,therefore,the development of effective malicious document classifiers has become particularly.***,detection methods based on document structure and behavioral features encounter challenges in feature engineering,these methods not only.have limited accuracy.but also consume large resources,and usually.can only.detect documents in specific formats,which lacks versatility.and *** address such problems,this paper proposes a novel malicious document detection method-visualizing documents as GGE images(Gray.cale,Gray.cale matrix,Entropy..The GGE method visualizes the original by.e sequence of the malicious document as a gray.cale image,the information entropy.sequence of the document as an entropy.image,and at the same time,the gray.cale level co-occurrence matrix and the texture and spatial information stored in it are converted into gray.cale matrix image,and fuses the three ty.es of images to get the GGE color *** Convolutional Block Attention Module-EfficientNet-B0(CBAM-EfficientNet-B0)model is then used for classification,combining transfer learning and apply.ng the pre-trained model on the ImageNet dataset to the feature extraction process of GGE *** shown in the experimental results,the GGE method has superior performance compared with other methods,which is suitable for detecting malicious documents in different formats,and achieves an accuracy.of 99.44%and 97.39%on Portable Document Format(PDF)and office datasets,respectively.and consumes less time during the detection process,which can be effectively.applied to the task of detecting malicious documents in real-time.

关键词： Malicious document visualization EfficientNet-B0 convolutional block attention module GGE image

Revisiting Plateau-Ray.eigh instability.in inorganic sy.thetic chemistry

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Science China Materials 2025年

作者： y.gang sun Department of Chemistry Temple University

Wetting-dewetting behavior is a universal phenomenon for fluids on solid surfaces,for instance,the liquid on spider silk and lotus leaves[1].Controlling the wetting-dewetting behavior of fluids in a predictable and generalizable manner is of broad interest in various applications,such as anti-corrosion,antifogging,medicine,oil-water separation,self-cleaning,and water harvesting[2].Specifically.in the one-dimensional （1D） sy.tem,it is usually.known as the Plateau-Ray.eigh （P-R） instability.which describes the volume-constant break-up of a continuous water cy.inder into isolated droplets （Fig.1a）[3,4].

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RF Optimizer Model for Predicting Compressive Strength of Recy.led Concrete

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Journal of Wuhan University.of Technology.Materials Science) 2025年第1期40卷 215-223页

作者： LIU Lin WANG Liuy.n WANG Hui sun Huay.e School of Civil Engineering and Architecture Shenyang UniversityShenyang 110000China

Traditional machine learning(ML)encounters the challenge of parameter adjustment when predicting the compressive strength of reclaimed *** address this issue,we introduce two optimized hy.rid models:the Bay.sian optimization model(B-RF)and the optimal model(Stacking model).These models are applied to a data set comprising 438 observations with five input variables,with the aim of predicting the compressive strength of reclaimed ***,we evaluate the performance of the optimized models in comparison to traditional machine learning models,such as support vector regression(SVR),decision tree(DT),and random forest(RF).The results reveal that the Stacking model exhibits superior predictive performance,with evaluation indices including R2=0.825,MAE=2.818 and MSE=14.265,surpassing the traditional ***,we also performed a characteristic importance analy.is on the input variables,and we concluded that cement had the greatest influence on the compressive strength of reclaimed concrete,followed by.***,the Stacking model can be recommended as a compressive strength prediction tool to partially.replace laboratory.compressive strength testing,resulting in time and cost savings.

关键词： machine learning recy.led concrete compressive strength

Solid Desiccant Dehumidification Techniques Inspired from Natural Electroosmosis Phenomena

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Journal of Bionic Engineering 2011年第1期8卷 90-97页

作者： B. Li y. y. y.n Faculty.of Engineering University of Nottingham Lenton Firs Building University Park Nottingham NG7 2RD UK

Electroosmosis has been shown to be an effective means of different applications in various fields such as Micro-Electro-Mechanical sy.tems （MEMS） and biomimetics applications. This paper aims to prove the concept that the electroosmosis phenomena can also be cooperated into larger scale applications in the building service industry.like dehumidification or damping proof. The electroosmotic flow inside a porous medium is validated experimentally.to further understand the dehumidification mechanism of combined techniques. An experimental test validates that the condensation from the porous medium can be obtained by.electroosmotic force generated by.external electric field, especially.for specific desiccant powders like zeolite and diatomaceous earth. With a range of volts from 5 V to 20 V apply.ng between the testing plates, the maximum flow rate through the cross section in the testing plate achieved during the peak period is 1.35 laL＇min 1. These promising phenomena can act as an alternative way.for energy.choice in dehumidification industrial field. Further researches on new regeneration methods for solid desiccant dehumidification are required to make the sy.tem simple, energy.saving and suitable for small air conditioning units.

关键词： biomimetics electroosmotic flow solid desiccant dehumidification