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A Simple Empirical Formula for Predicting the Ultimate Strength of ship Plates with Elastically Restrained Edges in Axial Compression

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China Ocean Engineering 2020年第4期34卷 571-580页

作者： liu Cong ZHANG shi-lian State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced ship and Deep-Sea Exploration Shanghai 200240China

An investigation is conducted on the static ultimate limit state assessment of ship hull plates with elastically restrained edges subjected to axial *** material and geometric non-linearities were considered in finite element(FE)*** initial geometric imperfection of the plate was considered,while the residual stress introduced by welding was not *** ultimate strength of simply supported ship hull plates compared well with the existing empirical formula to validate the correctness of the applied boundary conditions,initial imperfection and mesh *** extensive FE calculations on the ultimate strength of ship hull plates with elastically restrained edges are *** a new simple empirical formula for plate ultimate strength is developed,which includes the effect of the rotational restraint stiffness,rotational restraint stiffness,and aspect *** applying the new formula and FE method to ship hull plates in real ships,a good coincidence of the results between these two methods is obtained,which indicates that the new formula can accurately predict the ultimate strength of ship hull plates with elastically restrained edges.

关键词： ship hull plate ultimate strength axial compression elastically restrained edges empirical formula

Uncovering Causal Relationships for Debiased Repost Prediction Using Deep Generative Models

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Computers, Materials & Continua 2024年第12期81卷 4551-4573页

作者： Wu-jiu Sun Xiao Fan liu School of Computer Science and Engineering Southeast UniversityNanjing211189China Department of Media and Communication City University of Hong KongHong Kong SAR999077China

Microblogging platforms like X(formerly Twitter)and Sina Weibo have become key channels for spreading information *** predicting information spread,such as users’reposting activities,is essential for applications including content recommendation and analyzing public *** advanced models rely on deep representation learning to extract features from various inputs,such as users’social connections and repost history,to forecast reposting ***,these models frequently ignore intrinsic confounding factors,which may cause the models to capture spurious relationships,ultimately impacting prediction *** address this limitation,we propose a novel Debiased Reposting Prediction model(DRP).Our model mitigates the influence of confounding variables by incorporating intervention operations from causal inference,enabling it to learn the causal associations between features and user reposting ***,we introduce a memory network within DRP to enhance the model’s perception of confounder *** network aggregates and learns confounding information dispersed across different training data batches by optimizing the reconstruction ***,recognizing the challenge of acquiring prior knowledge of causal graphs,which is crucial for causal inference,we develop a causal discovery module within DRP(CD-DRP).This module allows the model to autonomously uncover the causal graph of feature variables by analyzing microblogging *** results on multiple real-world datasets demonstrate that our proposed method effectively uncovers causal relationships between variables,exhibits strong time efficiency,and outperforms state-of-the-art models in prediction performance(improved by 2.54%)and overfitting reduction(by 7.44%).

关键词： Repost prediction causal inference causal discovery memory network

Solution of ODE u″+p(u)(u′)2+q(u)=0 and Applications to Classifications of All Single Travelling Wave Solutions to Some Nonlinear Mathematical Physics Equations

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Communications in Theoretical Physics 2008年第2期49卷 291-296页

作者： liu Cheng-shi Department of Mathematics Daqing Petroleum Institute Daqing 163318 China

Under the travelling wave transformation, some nonlinear partial differential equations such as Camassa-Holm equation, High-order KdV equation, etc., are reduced to an integrable ODE expressed by u＂＋p（u）（u＇）^2 ＋ q（u） = 0 whose generai solution can be given. Furthermore, combining complete discrimination system for polynomiai, the classifications of all single travelling wave solutions to these equations are obtained. The equation u＂＋p（u）（u＇）^2＋q（u） = 0 includes the equation （u＇）^2 = f（u） as a special case, so the proposed method can be also applied to a large number of nonlinear equations. These complete results cannot be obtained by any indirect method.

关键词： classification of travelling wave solution symmetry group nonlinear partial differential equation

Two model equations with a second degree logarithmic nonlinearity and their Gaussian solutions

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Communications in Theoretical Physics 2021年第4期73卷 58-62页

作者： Cheng-shi liu Department of Mathematics Northeast Petroleum UniversityDaqing 163318China

In the paper,we try to study the mechanism of the existence of Gaussian waves in high degree logarithmic nonlinear wave *** first construct two model equations which include the high order dispersion and a second degree logarithmic *** then we prove that the Gaussian waves can exist for high degree logarithmic nonlinear wave equations if the balance between the dispersion and logarithmic nonlinearity is *** mathematical tool is the logarithmic trial equation method.

关键词： Gaussian solitary wave Gausson logarithmic nonlinearity wave equation trial equation method

Representations and Classification of Traveling Wave Solutions to sinh-Grdon Equation

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Communications in Theoretical Physics 2008年第1期49卷 153-158页

作者： liu Cheng-shi Department of Mathematics Daqing Petroleum Institute Daqing 163318 China

Two concepts named atom solution and combinatory solution are defined. The classification of all single traveling wave atom solutions to sinh-Gordon equation is obtained, and qualitative properties of solutions are discussed. In particular, we point out that some qualitative properties derived intuitively from dynamic system method are not true. Finally, we prove that our solutions to sinh-Gordon equation include all solutions obtained in the paper [Z.T. Fu, et al., Commun. Theor. Phys. （Beijing, China） 45 （2006） 55]. Through an example, we show how to give some new identities on Jacobian elliptic functions.

关键词： traveling wave solution atom solution exact solution sinh-GSrdon equation elliptic function

Actin nucleator formins regulate the tension-buffering function of caveolin-1

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Journal of Molecular Cell Biology 2021年第12期13卷 876-888页

作者： Xuemeng shi Daijiao Tang Yifan Xing Shuangshuang Zhao Changyuan Fan Jin Zhong Yanqin Cui Kun shi Yaming jiu The Joint Program in Infection and Immunity Guangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou 510623China The Joint Program in Infection and Immunity Institut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China Unit of Cell Biology and Imaging Study of Pathogen Host Interaction The Center for MicrobesDevelopment and HealthCAS Key Laboratory of Molecular Virology and ImmunologyInstitut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China Unit of Viral Hepatitis CAS Key Laboratory of Molecular VirologyInstitut Pasteur of ShanghaiChinese Academy of SciencesShanghai 200031China

Both the mechanosensitive actin cytoskeleton and caveolae contribute to active processes such as cell migration,morphogenesis,and vesicular *** distinct actin components are well studied,how they contribute to cytoplasmic caveolae,especially in the context of mechano-stress,has remained ***,we identify two actin-associated mobility stereotypes of caveolin-1(CAV-1)-marked intracellular vesicles,which are characterized as‘dwelling’and‘go and dwelling’.In order to exploit the reason for their distinct dynamics,elongated actin-associated formin functions are *** find drastically decreased density,increased clustering,and compromised motility of cytoplasmic CAV-1 vesicles resulting from lacking actin nucleator formins by both chemical treatment and RNA silencing of formin ***,hypo-osmosis-stimulated diminishing of CAV-1 is dramatically intensified upon blocking *** clustering of CAV-1 vesicles when cells are cultured on soft substrate is also aggravated under formin inhibition ***,we reveal that actin-associated formins are essential for maintaining the dynamic organization of cytoplasmic CAV-1 and importantly its sensitivity upon mechanical *** conclude that tension-controlled actin formins act as a safety valve dampening excessive tension on CAV-1 and safeguarding CAV-1 against mechanical damage.

关键词： caveolin-1 elongated actin filaments formins hypo-osmotic shock matrix stiffness

Quasi-cyclic LDPC codes with high-rate and low error floor based on Euclidean geometries

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The Journal of China Universities of Posts and Telecommunications 2012年第2期19卷 96-99页

作者： liu Yuan-hua ZHANG Mei-ling FAN jiu-lun School of Communication and Information Engmeering Xi’an University of Posts and TelecommunicationsXi’an 710121China

An improved Euclidean geometry approach to design quasi-cyclic （QC） Low-density parity-check （LDPC） codes with high-rate and low error floor is presented. The constructed QC-LDPC codes with high-rate have lower error floor than the original codes. The distribution of the minimum weight codeword is analyzed, and a sufficient existence condition of the minimum weight codeword is found. Simulations show that a lot of QC-LDPC codes with lower error floor can be designed by reducing the number of the minimum weight codewords satisfying this sufficient condition.

关键词： low-density parity-check codes quasi-cyclic Euclidean geometry

Dyes wastewater treatment by reduction-oxidation process in an electrochemical reactor packed with natural manganese mineral

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Journal of Environmental Sciences 2006年第1期18卷 17-22页

作者： WANG Ai-min QU jiu-hui liu Hui-juan LEI Peng-ju State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

A novel technology which combined electrochemical process catalyzed by manganese mineral with electro-assisted coagulation process was proposed in this study. The mineralization of organic pollutant from simulated dye wastewater containing an azo dye Acid Red B（ARB） was experimentally investigated using this method. It was found that the manganese mineral could catalyze the electrochemical process dramatically. The TOC removal percentage of electrochemical treatment catalyzed by manganese mineral was 43.6% while the TOC removal percentage of the process using the manganese mineral alone and using the electrolysis alone were 9.3% and 20.8%, respectively. Moreover, it was found that combined electroxidation with electro-assisted coagulation process could more effectively eliminate ARB. After a period of 180 min electrooxidation and 300 min electroreduction, almost 66.9% of TOC was removed, and the dissolved Mn^2＋. could be effectivly removed. The effects of the order of oxidation and reduction, the proper ratio electrooxidation/reduction time, and current density on the removal efficiency were investigated in detail. In addition, a proposed mechanism of manganese-mineral-catalyzed electrooxidation-reduction process was discussed in this paper.

关键词： manganese mineral electroreduction electrooxidation catalyze Acid Red B

A DISSIPATION-PRESERVING INTEGRATOR FOR DAMPED OSCILLATORY HAMILTONIAN SYSTEMS

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Journal of Computational Mathematics 2022年第4期40卷 570-588页

作者： Wei shi Kai liu College of Mathematical Sciences Nanjing Tech UniversityNanjing 211816China School of Statistics and Data Science Nanjing Audit UniversityNanjing 210023China

In this paper,based on discrete gradient,a dissipation-preserving integrator for weakly dissipative perturbations of oscillatory Hamiltonian system is *** solution of this system is a damped nonlinear ***,lots of nonlinear oscillatory mechanical systems including frictional forces lend themselves to this *** new integrator gives a discrete analogue of the dissipation property of the original ***,since the integrator is based on the variation-of-constants formula for oscillatory systems,it preserves the oscillatory structure of the *** properties of the new integrator are *** convergence is analyzed for the implicit iterations based on the discrete gradient integrator,and it turns out that the convergence of the implicit iterations based on the new integrator is independent of k Mk,where M governs the main oscillation of the system and usually k Mk≫*** significant property shows that a larger stepsize can be chosen for the new schemes than that for the traditional discrete gradient integrators when applied to the oscillatory Hamiltonian *** experiments are carried out to show the effectiveness and efficiency of the new integrator in comparison with the traditional discrete gradient methods in the scientific literature。

关键词： Weakly dissipative systems Oscillatory systems Structure-preserving algorithm Discrete gradient integrator Sine-Gordon equation Continuousα-Fermi-Pasta-Ulam system