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A review of methods,applications and limitations for incorporating fluid flow in the discrete element method

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第3期14卷 1005-1024页

作者： Tuo Wang Fengshou Zhang jason Furtney Branko Damjanac Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Tongji UniversityShanghai200092China Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai200092China Itasca Consulting Group Inc.MinneapolisMN55041USA

The past decade has witnessed the substantial growth in research interests and progress on the subject of coupled hydro-mechanical processes in rocks and soils,driven mainly by the surge of research in unconventional hydrocarbon reservoirs and associated *** coupling techniques have been developed to include the effects of fluid flow in the discrete element method(DEM),and the techniques have been applied to a variety of geomechanical *** these coupling methods have been successfully applied in various engineering fields,no single fluid/DEM coupling method is universal due to the complexity of engineering problems and the limitations of the numerical *** researchers and engineers,the key to solve a specific problem is to select the most appropriate fluid/DEM coupling method among these modeling *** purpose of this paper is to give a comprehensive review of fluid flow/DEM coupling methods and relevant *** their importance,the availability or unavailability of best practice guidelines is *** theoretical background and current status of DEM are introduced first,and the principles,applications,and advantages and disadvantages of different fluid flow/DEM coupling methods are ***,a summary with speculation on future development trends is given.

关键词： Hydro-mechanical process Fluid/discrete element method(DEM) coupling Geomechanics Numerical modeling

Meter-scale variation within a single transect demands attention to taxon accumulation curves in riverine microbiome studies

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Frontiers of Environmental Science & Engineering 2022年第5期16卷 115-125页

作者： Bingdi Liu Lin Zhang jason H.Knouft Fangqiong Ling Department of Energy Environmental and Chemical EngineeringWashington University in St.LouisSt.LouisMO 63130USA Department of Biology Saint Louis UniversitySt.LouisMO 63103USA National Great Rivers Research and Education Center East AltonMO 62035USA Department of Computer Science and Engineering Washington University in St.LouisSt.LouisMO 63130USA Division of Biological and Biomedical Sciences Washington University in St.LouisSt.LouisMO 63110USA Division of Computational and Data Science Washington University in St.LouisSt.LouisMO 63130USA

Microbial communities inhabiting river ecosystems play crucial roles in global biogeochemical cycling and pollution *** variations in local microbial assemblages are important for detailed understanding of community assembly and developing robust biodiversity sampling ***,we intensely analyzed twenty water samples collected from a one-meter spaced transect from the near-shore to the near-center in the Meramec River in eastern Missouri,USA and examined the microbial community composition with 16S rRNA gene amplicon *** microbiomes across the transect exhibited extremely high similarity,with Pearson’s correlation coefficients above 0.9 for all pairwise community composition ***,despite the high similarity,PERMANOVA revealed significant spatial differences between near-shore and nearcenter communities(p=0.001).Sloan’s neutral model simulations revealed that within-transect community composition variation was largely explained by demographic stochasticity(R^(2)=0.89).Despite being primarily explained by neutral processes,LefSe analyses also revealed taxa from ten families of which relative abundances differed directionally from the bank to the river center,indicating an additional role of environmental ***,the local variations within a river transect can have profound impacts on the documentation of alpha ***-accumulation curves indicated that even twenty samples did not fully saturate the sampling effort at the genus level,yet four,six and seven samples were able to capture 80%of the phylum-level,family-level,and genus-level diversity,*** study for the first time reveals hyperlocal variations in riverine microbiomes and their assembly mechanisms,demanding attention to more robust sampling strategies for documenting microbial diversity in riverine systems.

关键词： Microbiome Freshwater Taxon accumulation curve Community assembly

Heterogeneous numerical modelling for the auto thermal reforming of crude glycerol in a fixed bed reactor

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Chinese Journal of Chemical Engineering 2022年第2期35卷 261-268页

作者： jason Williams Hussameldin Ibrahim Nima Karimi Kelvin Tsun Wai Ng Clean Energy Technologies Research Institute Process Systems EngineeringFaculty of Engineering and Applied ScienceUniversity of ReginaRegina SK S4S 0A2Canada Environmental Systems Engineering Faculty of Engineering and Applied ScienceUniversity of ReginaRegina SK S4S 0A2Canada

A mathematical model for the catalytic autothermal reforming(ATR)reaction of synthetic crude glycerol to hydrogen in a fixed bed tubular reactor(FBTR)and over an in-house developed metal oxide catalyst is presented in this *** heterogeneous model equations account for a two-phase system of solid catalyst and bulk feed ***,the ATR of crude glycerol reaction scheme and intrinsic kinetic rate model over an active,selective,and stable nickel-based catalyst were integrated in the developed ***,the model was validated using experimental data generated in our labs for the ATR of synthetic crude *** modelling results adequately described the detailed gas product composition and distribution,temperature profiles,and conversion propagation in the axial direction of the fixed bed reactor over a wide range of reaction temperature(773–923 K)and mass-time(12.71–158.23 g cat·min·(mol C)^(-1)).The crude glycerol conversion predicted with the model showing a close resemblance to those obtained experimentally with an average absolute deviation(AAD)of less than 8%.The maximum crude glycerol conversion and hydrogen yield were found to be 92%and 3 mol hydrogen/mol crude glycerol,***,the gas product concentration profile in the reactor was adequately described(90%)accuracy with a hydrogen concentration of 39%(volume).

关键词： reforming catalyst fixed

Mutually trustworthy human-machine knowledge automation and hybrid augmented intelligence:mechanisms and applications of cognition,management,and control for complex systems

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Frontiers of Information Technology & Electronic Engineering 2022年第8期23卷 1142-1157页

作者： Fei-Yue WANG Jianbo GUO Guangquan BU Jun jason ZHANG The State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China State Grid Cooperation of China Beijing 100031China China Electric Power Research Institute Beijing 100192China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China

In this paper,we aim to illustrate the concept of mutually trustworthy human-machine knowledge automation(HM-KA)as the technical mechanism of hybrid augmented intelligence(HAI)based complex system cognition,management,and control(CMC).We describe the historical development of complex system science and analyze the limitations of human intelligence and machine *** need for using human-machine HAI in complex systems is then explained in *** concept of“mutually trustworthy HM-KA”mechanism is proposed to tackle the CMC challenge,and its technical procedure and pathway are demonstrated using an example of corrective control in bulk power grid *** is expected that the proposed mutually trustworthy HM-KA concept can provide a novel and canonical mechanism and benefit real-world practices of complex system CMC.

关键词： Complex systems Human-machine knowledge automation Parallel systems Bulk power grid dispatch Artificial intelligence Internet of Minds(IoM)

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去增长意味着什么:澄清几个问题

鄱阳湖学刊 2024年第3期 5-11,155页

作者：杰森·希克尔唐发发(译) 英国伦敦政治经济学院英国皇家人文学会海南大学马克思主义学院海南海口570228

去增长是指有计划地减少能源和资源的使用量,旨在通过减少不平等现象和提高人类福祉的方式,使经济与生物世界恢复平衡。在过去几年里,虽然该理念在学术界和社会运动中引起了极大关注,但是初次接触这个理念的人还是会遇到许多问题。文章... 详细信息

去增长是指有计划地减少能源和资源的使用量,旨在通过减少不平等现象和提高人类福祉的方式,使经济与生物世界恢复平衡。在过去几年里,虽然该理念在学术界和社会运动中引起了极大关注,但是初次接触这个理念的人还是会遇到许多问题。文章试图澄清三个具体问题:一是明确“去增长”的含义,并论证去增长框架是一种资产而非负债;二是解释去增长与经济衰退之间的根本区别;三是确认去增长主要集中于高收入国家,并探讨去增长对全球南方国家的影响。

关键词：去增长新冠肺炎疫情经济衰退全球南方

Transcranial photobiomodulation with near-infrared light:a promising therapeutic modality for Alzheimer's disease

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Neural Regeneration Research 2023年第9期18卷 1944-1945页

作者： Hanli Liu Damir Nizamutdinov jason H.Huang Bioengineering Department the University of Texas at ArlingtonArlingtonTXUSA Neurosurgery Neuroscience InstituteBaylor Scott and White HealthTempleTXUSA Neurosurgery College of MedicineTexas A&M UniversityTempleTXUSA

Transcranial photobiomodulation(tPBM) is a noninvasive neuromodulation technique that delivers near-infrared(NIR) light with low irradiance(i.e.,power density in mW/cm2) in the wavelength range of 800-1070 *** recently published books or collected literature(Hamblin,2019;GonzalezLima,2021) and papers(Nizamutdinov et al. 2022)offer comprehensive reviews of the mechanism of action and potential clinical translations of tPBM for the treatment of a variety of diseases,including neurodegenerative diseases(Alzheimer’s disease(AD),and Parkinson’s disease),traumatic brain injury.

关键词： Alzheimer diseases

A critical examination of robustness and generalizability of machine learning prediction of materials properties

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npj Computational Materials 2023年第1期9卷 1787-1795页

作者： Kangming Li Brian DeCost Kamal Choudhary Michael Greenwood jason Hattrick-Simpers Department of Materials Science and Engineering University of Toronto27 King’s College CirTorontoONCanada Material Measurement Laboratory National Institute of Standards and Technology100 Bureau DrGaithersburgMDUSA Theiss Research La JollaCA 92037USA Canmet MATERIALS Natural Resources Canada183 Longwood Road southHamiltonONCanada

Recent advances in machine learning(ML)have led to substantial performance improvement in material database benchmarks,but an excellent benchmark score may not imply good generalization *** we show that ML models trained on Materials Project 2018 can have severely degraded performance on new compounds in Materials Project 2021 due to the distribution *** discuss how to foresee the issue with a few simple ***,the uniform manifold approximation and projection(UMAP)can be used to investigate the relation between the training and test data within the feature ***,the disagreement between multiple ML models on the test data can illuminate out-of-distribution *** demonstrate that the UMAP-guided and query by committee acquisition strategies can greatly improve prediction accuracy by adding only 1%of the test *** believe this work provides valuable insights for building databases and models that enable better robustness and generalizability.

关键词： prediction adding critical

Schizophrenic Border and Viral Optics in Raymond Williams's Border Country

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外国语言与文化(英文) 2023年第1期7卷 114-128页

作者： Jiayan Mi jason Toncic The College of New Jersey Glen Rock Public Schools and Montclair State University

This essay examines Raymond Williams's autobiographical novel Border Country,the first novel of his ambitious"Welsh Trilogy."The aim of the essay is ***,it analyzes the unsettling issue of how a bio-regional place(native place)shapes polyvalent identities in a historically changing environment and how the boundary that crisscrosses the passages of life is redrawn through narrative re-circumscription and optical ***,the essay calls this trope of internalizing"border-crossing"into question in the context of global diaspora and critically problematizes Williams's identity politics as schizophrenic split from British post-colonial empire.

关键词： Raymond Williams Border country identity politics optical semiotics landscape and power post-colonial Schizophrenia

Brain-derived neurotrophic factor and inflammation in depression:Pathogenic partners in crime?

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World Journal of Psychiatry 2022年第1期12卷 77-97页

作者： Grace A Porter jason C O’Connor Department of Pharmacology UT Health San AntonioSan AntonioTX 78229United States Department of Pharmacology University of Texas Health San AntonioSan AntonioTX 78229United States Audie L.Murphy VA Hospital South Texas Veterans Health SystemSan AntonioTX 78229United States

Major depressive disorder is a debilitating disorder affecting millions of people each ***-derived neurotrophic factor(BDNF)and inflammation are two prominent biologic risk factors in the pathogenesis of depression that have received considerable *** clinical and animal studies have highlighted associations between low levels of BDNF or high levels of inflammatory markers and the development of behavioral symptoms of ***,less is known about potential interaction between BDNF and inflammation,particularly within the central nervous *** evidence suggests that there is bidirectional regulation between these factors with important implications for the development of depressive symptoms and antidepressant *** levels of inflammatory mediators have been shown to reduce expression of BDNF,and BDNF may play an important negative regulatory role on inflammation within the *** this interaction more fully within the context of neuropsychiatric disease is important for both developing a fuller understanding of biological pathogenesis of depression and for identifying novel therapeutic *** we review these two prominent risk factors for depression with a particular focus on pathogenic implications of their interaction.

关键词： Brain-derived neurotrophic factor Microglia Neuroinflammation Growth factors Depression