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A modified model of Lundberg-Palmgren rolling contact fatigue formula considering the effects of surface treatments

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Friction 2023年第10期11卷 1922-1938页

作者： Boyu ZHANG Huaiju LIU Peitang WEI mario GUAGLIANO Shengwen HOU State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China Dept.Mechanical Engineering Politecnico di MilanoMilano 20133Italy Shaanxi Fast Auto Drive Refco Group Ltd. Xi’an 710119China

The Lundberg–Palmgren(L–P)fatigue life formula,as a statistical fatigue theory,has been widely used in the ***,its direct applicability is limited to the components treated by surface strengthening *** contact fatigue tests and surface integrity measurements of American Iron and Steel Institute(AISI)9310 rollers with several surface treatments were performed to address this *** on these results,a modified L–P fatigue model was proposed,enabling the consideration of surface modification including surface roughness,residual stress,and hardening introduced by different surface *** with the original L–P fatigue formula,its results are more accurate for surface strengthened ***,this method can assess the contact fatigue life of gears treated by surface strengthening techniques.

关键词： Lundberg-Palmgren(L-P)fatigue life formula surface strengthening techniques surface integrity contact fatigue life assessment

Photonics Advances Quantum Science and Technologies

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Advanced Photonics 2021年第6期3卷 1-2页

作者： mario Agio Chao-Yang Lu University of Siegen Laboratory of Nano-Optics SiegenGermany National Research Council National Inst.of Optics(CNR-INO)FlorenceItaly University of Science and Technology of China(USTC) Hefei National Laboratory for Physical Sciences at the Microscale Hefei China

Quantum science and technology is currently one of the most exciting frontiers in research and *** effort is being de-voted to pushing fundamental science into technology,with support from large,coordinated programs t... 详细信息

关键词： frontier coordinated Quantum

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Stability and scour development of bed material on crossbar block ramps

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International Journal of Sediment Research 2015年第4期30卷 344-350页

作者： mario Oertel Daniel B.Bung Hydraulic Engineering Section Lbeck University of Applied Sciences Hydraulic Engineering Section Aachen University of Applied Sciences

Block ramps are ecologically oriented drop structures with adequate energy dissipation and partially moderate flow velocities.A special case is given with crossbar block ramps,where the upstream and downstream level difference is reduced by a series of *** prevent the total structure from failing,the stability of single boulders within the crossbars and the bed material in between must be *** present paper addresses the stability of bed material and scour development for various flow *** bed material erosion may affect the stability of the crossbar boulders,which in turn can result in major damages of the *** new design approaches are developed to choose an appropriate bed material size and to avoid failures of crossbar block ramp structures.

关键词： Crossbar block ramp Scouring Bed material erosion Particle densimetric Froude number

Intelligent geospatial maritime risk analytics using the Discrete Global Grid System

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Big Earth Data 2022年第3期6卷 294-322页

作者： Andrew Rawson Zoheir Sabeur mario Brito Department of Electronics and Computer Science University of SouthamptonUK Department of Computing and Informatics Talbot CampusUniversity of BournemouthBournemouthUK Department of Decision Analytics and Risk Southampton Business SchoolUniversity of SouthamptonUK

Each year,accidents involving ships result in significant loss of life,environmental pollution and economic *** promotion of navigation safety through risk reduction requires methods to assess the spatial distribution of the relative likelihood of ***,such methods necessitate the integration of large volumes of heterogenous datasets which are not well suited to traditional data *** paper proposes the use of the Discrete Global Grid System(DGGS)as an efficient and advantageous structure to integrate vessel traffic,metocean,bathymetric,infrastructure and other relevant maritime datasets to predict the occurrence of ship *** and heterogenous datasets are well suited for machine learning algorithms and this paper develops a spatial maritime risk model based on a DGGS utilising such an approach.A Random Forest algorithm is developed to predict the frequency and spatial distribution of groundings while achieving an R2 of 0.55 and a mean squared error of *** resulting risk maps are useful for decision-makers in planning the allocation of mitigation measures,targeted to regions with the highest *** work is identified to expand the applications and insights which could be achieved through establishing a DGGS as a global maritime spatial data structure.

关键词： Maritime risk Discrete Global Grid System big data machine learning

Gut microbiota and mesenteric adipose tissue interactions in shaping phenotypes and treatment strategies for Crohn’s disease

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World Journal of Gastroenterology 2024年第46期30卷 4969-4976页

作者： Anis Hasnaoui Racem Trigui mario Giuffrida Faculty of Medicine of Tunis Tunis El Manar UniversityBab Saadoun Tunis 1007Tunisia Department of General Surgery Menzel Bourguiba HospitalMenzel Bourguiba 7050BizerteTunisia Department of General Surgery Guglielmo da Saliceto HospitalPiacenza 29100Italy

In this letter,we commented on the article by Wu et *** examined the interactions between mesenteric adipose tissue,creeping fat,and gut microbiota in Crohn’s disease(CD),a condition marked by chronic gastrointestinal inflammation with a rising global *** pathogenesis of CD involves complex genetic,environmental,and microbial ***,which is an imbalance in gut microbial communities,is frequently observed in CD patients,highlighting the pivotal role of the gut microbiota in disease progression and the inflammatory *** studies have shown that mesenteric adipose tissue and creeping fat actively contribute to inflammation by producing proinflammatory *** relationship between creeping fat and altered microbiota can shift from a potentially protective role to one that encourages bacterial translocation,further complicating disease *** research has suggested that fecal microbiota transplantation could help restore microbial balance,offering a promising therapeutic strategy to improve clinical disease response.

关键词： Crohn’s disease Intestinal microbiota Dysbiosis Intestinal barrier Mesenteric adipose tissue Creeping fat Fecal microbiota transplantation

Testosterone therapy: a friend or a foe for the aging men with benign prostatic hyperplasia?

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Asian Journal of Andrology 2020年第3期22卷 233-235页

作者： Giulia Rastrelli Linda Vignozzi mario Maggi Sexual Medicine and Andrology Unit Department of Experimental and Clinical Biomedical SciencesUniversity of FlorenceViale PieracciniFlorence 61-50139Italy LN.B.B. Biostructures and Biosystems National InstituteViale delle Medaglie d'Oro305Rome 1-00136Italy Endocrinology Unit Department of Experimental Clinical and Biomedical Sciences"Mario Serio"University of FlorenceViale PieracciniFlorence 61-50139Italy.

One of the major concerns for the prescription of medications containing testosterone(T)in the aging men with T deficiency(TD)is prostate disorders(such as benign prostatic hyperplasia,BPH)and their related symptoms(lower urinary tract symptoms,LUTS).This is because prostate is an androgen-responsive gland;however,the androgen dependence of prostate growth,well demonstrated in earlier phases of life,has no clear evidence in late adulthood and *** fact,after the age of 40 years,BPH becomes increasingly more *** the other hand,in men older than 40 year,a progressive decline in T is *** epidemiological data are a starting point for questioning a putative detrimental role of T on the prostate health in the ageing man.

关键词： prostatic BPH prescription

The Hsp90-binding immunophilin FKBP52 enhances neurodifferentiation and neuroregeneration in murine models

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Neural Regeneration Research 2022年第3期17卷 555-556页

作者： Cristina Daneri-Becerra mario D.Galigniana Instituto de Biología y Medicina Experimental/CONICET&Departamento de Química Biológica Facultad de Ciencias Exactas y Naturales Universidad de Buenos AiresBuenos AiresArgentina

The term immunophilin involves a family of proteins whose domain shows peptidylprolyl-(cis/trans)-isomerase (PPIase)enzymatic activity,i.e., the reversible cis/trans interconversion of Xaa-Pro bonds (Annett et al.,2020).The PPlase domain of these proteins usually binds to immunosuppressive drugs,such as the macrolide FK506 (referred to as the FKBP subfamily) or the cyclic undecapeptide cyclosporine A (called CyP subfamily).

关键词： bonds reversible enzymatic

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An algebraic approach to dynamic optimisation of nonlinear systems:a survey and some new results

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Journal of Control and Decision 2019年第1期6卷 1-29页

作者： mario Sassano Thulasi Mylvaganam Alessandro Astolfi Dipartimento di Ingegneria Civile e Ingegneria Informatica Tor VergataRomeItaly Department of Aeronautics Imperial College LondonLondonUK Department of Electrical and Electronic Engineering Imperial College LondonLondonUK Department of Aeronautics Imperial College LondonLondon SW72AZUK

Dynamic optimisation,with a particular focus on optimal control and nonzero-sum differential games,is *** nonlinear systems solutions sought via the dynamic programming strategy are inevitably characterised by partial differential equations(PDEs)which are often difficult to solve.A detailed overview of a control design framework which enables the systematic construction of approximate solutions for optimal control problems and differential games without requiring the explicit solution of any PDE is provided along with a novel design of a nonlinear control gain aimed at improving the‘level of approximation’***-agent systems are considered as a possible application of the theory.

关键词： Optimal control game theory nonlinear control systems disturbance attenuation multi-agent systems

Majorana Representations of Finite Groups

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Algebra Colloquium 2020年第1期27卷 31-50页

作者： Clara Franchi Alexander A.Ivanov mario Mainardis Dipartimento di Matematica e Fisica Universita Cattolica del Sacro Cuore Via Musei 41I-25121 BresciaItaly Department of Mathematics Imperial College 180 Queen's Gt.LondonSW72AZUK Institute for System Analysis FRC CSCRASRussia Dipartimento di Matematica e Informatica Universita di Udine Via delle Scienze 206I-33100 UdineItaly

In this paper we give a brief overview of the theory of Majorana representations of finite groups.

关键词： axial algebras Majorana representations Monster group Monster algebra,association schemes