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fast prediction of indoor airflow distribution inspired by synthetic image generation artificial intelligence

Building Simulation 2023年第7期16卷 1219-1238页

作者： Cary A.faulkner dominik S.Jankowski John E.Castellini jr.Wangda Zuo Philipp Epple Michael d.Sohn Ali Taleb Zadeh Kasgari Walid Saad department of Mechanical Engineering University of Colorado BoulderBoulderCOUSA HySON Institut SonnebergGermany department of Architectural Engineering Pennsylvania State UniversityUniversity ParkPAUSA department of Mechanical Engineering Coburg University of Applied SciencesCoburgGermany Energy Analysis and Environmental Impacts division Lawrence Berkeley National LaboratoryBerkeleyCAUSA department of Electrical and Computer Engineering Virginia TechArlingtonVAUSA

Prediction of indoor airflow distribution often relies on high-fidelity,computationally intensive computational fluid dynamics(Cfd)*** intelligence(Al)models trained by Cfd data can be used for fast and accurate prediction of indoor airflow,but current methods have limitations,such as only predicting limited outputs rather than the entire flow ***,conventional Al models are not always designed to predict different outputs based on a continuous input range,and instead make predictions for one or a few discrete *** work addresses these gaps using a conditional generative adversarial network(CGAN)model approach,which is inspired by current state-of-the-art Al for synthetic image *** create a new Boundary Condition CGAN(BC-CGAN)model by extending the original CGAN model to generate 2d airflow distribution images based on a continuous input parameter,such as a boundary ***,we design a novel feature-driven algorithm to strategically generate training data,with the goal of minimizing the amount of computationally expensive data while ensuring training quality of the Al *** BC-CGAN model is evaluated for two benchmark airflow cases:an isothermal lid-driven cavity flow and a non-isothermal mixed convection flow with a heated *** also investigate the performance of the BC-CGAN models when training is stopped based on different levels of validation error *** results show that the trained BC-CGAN model can predict the 2d distribution of velocity and temperature with less than 5%relative error and up to about 75,ooo times faster when compared to reference Cfd *** proposed feature-driven algorithm shows potential for reducing the amount of data and epochs required to train the Al models while maintaining prediction accuracy,particularly when the flow changes non-linearlywith respectto an input.

关键词： artificial intelligence indoor airflow conditional generative adversarial network computational fluid dynamics

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A randomized trial comparing the Tennant Biomodulator to transcutaneous electrical nerve stimulation and traditional Chinese acupuncture for the treatment of chronic pain in military service members

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Military Medical Research 2020年第2期7卷 140-150页

作者： Kimberly S.Peacock Erika Stoerkel Salvatore libretto Weimin Zhang Alice Inman Michael Schlicher John d.Cowsar jr.david Eddie Joan Walter University of Texas Health San Antonio 7703 Floyd Curl DriveSan AntonioTX78229USA TlI foundation 1750 Tysons BoulevardMcLeanVirginia22102USA Henry M.Jackson foundation 6720A Rockledge DriveBethesdaMD20817USA Bd life Sciences 1 Becton DriveFranklin LakesNJ07417USA Brooke Army Medical Center 3551 Roger Brooke DriveFort Sam HoustonTX78234USA Madigan Army Medical Center 9040A Jackson AveJoint Base Lewis-McChordWA98431USA MedPost Urgent Care Center 513 Cibolo Valley DriveCiboloTX78108USA Massachusetts General Hospital Harvard Medical School151 Merrimac St.6th FloorBostonMA02114USA H&S Ventures Samueli Integrative Health Program1800 Diagonal RoadSuite 617AlexandriaVA22314USA

Background:The present investigation tested the efficacy of the Tennant Biomodulator,a novel pain management intervention that uses biofeedback-modulated electrical stimulation,to reduce chronic pain and its psychosocial sequelae in a sample of current and former military service *** Tennant Biomodulator used on its most basic setting was compared to two commonly used,non-pharmacological pain treatments—traditional Chinese acupuncture and transcutaneous electrical nerve stimulation(TENS)—in a comparative efficacy,randomized,open-label ***:Participants included 100 active duty and retired service men and women with chronic pain undergoing treatment at the Brooke Army Medical Center in Texas,USA,randomly assigned to receive six,weekly sessions of either Tennant Biomodulator treatment,traditional Chinese acupuncture,or TENS,in addition to usual *** was conducted between May 2010 to September *** measures were collected at intake,before and after each treatment session,and at a 1-month ***-to-treat analyses were used throughout,with mixed models used to investigate main effects of group,time,and group×time interactions with consideration given to quadratic *** measured included ratings of chronic pain,pain-related functional disability,and symptoms of post-traumatic stress disorder(PTSd)and ***:On average,regardless of their treatment group,participants exhibited a 16%reduction in pain measured by the Brooke Army Medical Center’s Clinic Pain log[f(1,335)=55.7,Pd an 11%reduction in pain-related disability measured by the Million Visual Analog Scale[MVAS:f(1,84)=28.3,Pfrom baseline to the end of treatment,but no one treatment performed better than the other,and the reductions in pain and pain-related disability were largely lost by 1-month *** of PTSd and depression did not change significantly as a function of time or ***:findings build on previ

关键词： Tennant biomodulator Acupuncture Transcutaneous electrical nerve stimulation Chronic pain Military service members

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Weather-based interruption prediction in the smart grid utilizing chronological data

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Journal of Modern Power Systems and Clean Energy 2016年第2期4卷 308-315页

作者： Arif I.SARWAT Mohammadhadi AMINI Alexander dOMIJAN jr. Aleksandar dAMNJANOVIC faisal KAlEEM department of Electrical and Computer Engineering Florida International UniversityMiamiFLUSA department of Electrical Engineering University of BuffaloBuffaloNYUSA Midzor LLC.Power SystemsMagneticsHigh VoltageOldsmarFLUSA

This unique study will demonstrate a combined effect of weather parameters on the total number of power distribution interruptions in a *** on common weather conditions,a theoretical model can predict interruptions and risk assessment with immediate weather *** daily and hourly weather data,the created models will predict the number of daily or by-shift *** weather and environmental conditions to be addressed will include rain,wind,temperature,lightning density,humidity,barometric pressure,snow and *** will be developed to allow broad *** and deterministic simulations of the models using the data collected will be conducted by employing existing software,and the results will be used to refine the *** developed in this study will be used to predict power interruptions in areas that can be readily monitored,thus validating the *** application has resulted in defining the predicted number of interruptions in a region with a specific confidence *** is major concern for every *** and timely action to minimize the outage duration improves *** of this predictor model with existing smart grid self-healing technology is proposed.

关键词： Interruption prediction Modeling Artificial neural networks Self-healing Smart grid Weather conditions effect

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functionally graded structure of a nitride-strengthened Mg_(2)Si-based hybrid composite

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Journal of Magnesium and Alloys 2024年第3期12卷 1239-1256页

作者： Jeongho Yang Woongbeom Heogh Hogi Ju Sukhyun Kang Tae-Sik Jang Hyun-do Jung Mohammad Jahazi Seung Chul Han Seong Je Park Hyoung Seop Kim Susmita Bose Amit Bandyopadhyay Martin Byung-Guk Jun Young Won Kim dae-kyeom Kim Rigoberto CAdvincula Clodualdo Aranas jr.Sang Hoon Kim School of Mechanical Engineering Pusan National UniversityBusan 46241Republic of Korea department of Mechanical design Engineering Hanyang UniversitySeoul 04763Republic of Korea Process Research 3 Team LG Display Co.Ltd.PajuGyeonggi-do 10845Republic of Korea department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea Institute of Well-Aging Medicare&Chosun University lAMP Center Chosun UniversityGwangju 61452Republic of Korea division of Materials Science and Engineering Hanyang UniversitySeoul 04763Republic of Korea department of Mechanical Engineering École de Technologie SupérieureMontrealQuebec H3C 1K3Canada Material&Component Convergence R&d Center Korea Construction Equipment Technology InstituteGunsanJeollabuk-do 54002Republic of Korea School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore Graduate Institute of ferrous&Eco Materials Technology Pohang University of Science and TechnologyPohangGyeongsangbuk-do 37673Republic of Korea Advanced Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03722Republic of Korea School of Mechanical and Materials Engineering Washington State UniversityPullmanWashington 99164USA School of Mechanical Engineering Purdue UniversityWest LafayetteIndiana 47907USA Research Institute of Advanced Manufacturing Technology Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea department of Macromolecular Science and Engineering Case Western Reserve UniversityClevelandOhio 44106USA department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials University of TennesseeKnoxvilleTennessee 37996USA Center for Nanophase Materials and Sciences Oak Ridge National LaboratoryOak RidgeTennessee 37830USA department of Mechanical Engineering University of New BrunswickFrederictonNew Brunswick E3B 5A3Cana

The ex-situ incorporation of the secondary SiC reinforcement,along with the in-situ incorporation of the tertiary and quaternary Mg_(3)N_(2) and Si_(3)N_(4) phases,in the primary matrix of Mg_(2)Si is employed in order to provide ultimate wear resistance based on the laser-irradiation-induced inclusion of N_(2) gas during laser powder bed *** is substantialized based on both the thermal diffusion-and chemical reactionbased metallurgy of the Mg_(2)Si–SiC/nitride hybrid *** study also proposes a functional platform for systematically modulating a functionally graded structure and modeling build-direction-dependent architectonics during additive *** strategy enables the development of a compositional gradient from the center to the edge of each melt pool of the Mg_(2)Si–SiC/nitride hybrid ***,the coefficient of friction of the hybrid composite exhibits a 309.3%decrease to–1.67 compared to–0.54 for the conventional nonreinforced Mg_(2)Si structure,while the tensile strength exhibits a 171.3%increase to 831.5 MPa compared to 485.3 MPa for the conventional *** outstanding mechanical behavior is due to the(1)the complementary and synergistic reinforcement effects of the SiC and nitride compounds,each of which possesses an intrinsically high hardness,and(2)the strong adhesion of these compounds to the Mg_(2)Si matrix despite their small sizes and low concentrations.

关键词： laser powder bed fusion Mg_(2)Si-SiC/nitride hybrid composite Both the thermal diffusion-and chemical reaction-based metallurgy functionally graded structure Compositional gradient Wear resistance.

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100 case studies in pathophysiology / Harold J. Bruyere, jr.

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2009年

作者： Harold J. Bruyere jr.

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China's Belt and Road Initiative:Estrangement or Engagement with the United States

China's Belt and Road Initiative:Estrangement or Engagement ...

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作者： Joseph Courtland Johnson jr. 华东师范大学

学位级别：硕士

中国的上升对美国很紧张。见状,在亚洲美国想有更重要的影响。如此,美国的转向亚洲,跨太平洋伙伴关系,和新丝绸之路压抑中国。一带一路倡议是中国的响应。这论文把美国的亚洲目标比较中国的。这分论文会查两个国家的目标有合作机会还是... 详细信息

中国的上升对美国很紧张。见状,在亚洲美国想有更重要的影响。如此,美国的转向亚洲,跨太平洋伙伴关系,和新丝绸之路压抑中国。一带一路倡议是中国的响应。这论文把美国的亚洲目标比较中国的。这分论文会查两个国家的目标有合作机会还是他们会有竞争。本文分析了中国的“一带一路”和美国“转向亚洲”的动因。我发现“一带一路”并不与美国在亚洲的目标相冲突。而且,中国提供的替代援助不是西方国家给出的。

关键词：一带一路中美关系地缘政治转向亚洲

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Basic Marketing: A Global-managerial Approach 14th ed.

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丛书名： McGraw-Hill/Irwin series in marketing

2002年

作者： William d. Perreault jr. Jerome E.

Includes bibiliographical references (p. 754-810) and indexes.

ISBN: (数字)0072409479

ISBN: (纸本)0072409479;9780072409475

Includes bibiliographical references (p. 754-810) and indexes.

关键词： Marketing Management.

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Thermodynamic feedback between Clouds and the Ocean Surface Mixed layer

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Advances in Atmospheric Sciences 1990年第1期7卷 1-10页

作者： P.C.Chu Roland W.Garwood jr. department of Oceanography. Naval Postgraduate School Monterey CA 93943 U.S.A.Department of Oceanography. Naval Postgraduate School Monterey CA 93943 U.S.A.

A cloud-ocean planetary boundary layer (OPBl) feedback mechanism is presented and tested in this paper. Water vapor, evaporated from the ocean surface or transported by the large-scale air flow, often forms convective clouds under a conditionally unstable lapse rate. The variable cloud cover and rainfall may have positive and negative feedback with the ocean mixed layer temperature and salinity structure. The coupling of the simplified Kuo's (1965) cumulus cloud model to the Kraus-Turner's (1967) ocean mixed layer model shows the existence of this feedback mechanism. The theory also predicts the generation of low frequency oscillation in the atmosphere and oceans.

关键词： Cl feedback Thermodynamic feedback between Clouds and the Ocean Surface Mixed layer

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3d Cfd Simulation of Pulsatile Blood flow in the Human Aorta

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Chinese Journal of Biomedical Engineering(English Edition) 2003年第4期12卷 174-183页

作者： Herbert Oertel jr. lukas Zürcher Torsten Schenkel Institute of fluid Mechanics University of KarlsruheInstitute of Fluid MechanicsUniversity of KarlsruheInstitute of Fluid MechanicsUniversity of Karlsruhe karlsruhe D-76128Germanykarlsruhe D-76128Germanykarlsruhe D-76128Germany

A three-dimensional computational fluid dynamics (Cfd) simulation of the physiological pulsatile blood flow in the human aortic arch and its three branches has been conducted by using commercial software StarCd. The blood flow, of a peak Reynolds number of 3289 and a Womersley parameter of 16.44, was simulated in a rigid aorta geometry that was built by computer aided design (CAd) reconstruction method based on autopsy data of a female adult. The purpose of this work is to further the understanding of the complex nature of aorta flow, therefore it mainly focuses on analysis of the spatial and temporal distributions of velocities and wall shear stresses. The results, illustrated by 3d visualization pictures and 2d graphs of the primary velocity profiles, wall shear stress and pressure distributions, as well as the secondary flow patterns, are in good agreement with those of other experimental and computational works. The distributions of pressure and wall shear stress support the correlation between high and low shear stresses and pressures and the atherosclerotic lesions.

关键词： Hemodynamics Computational fluid dynamics The human aorta Pulsatile blood flow Simulation of flow field

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THE GATE SQUAll lINE Of 9-10 AUGUST 1974

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Advances in Atmospheric Sciences 1987年第1期4卷 85-92页

作者：韦统健,Robert A. Houze jr. department of Atmospheric Sciences Nanjing University Nanjing department of Atmospheric Sciences University of Washington Seattle WA 98195 U.S.A.

A tropical squall line that passed over the ship array of the Global Atmospheric Research Programme's Atlantic Tropical Experiment (GATE) on 9-10 August 1974 is analyzed. This squall line was similar to squall systems that passed over the GATE ship array on four other days. It began as a purely convective cloud line, then developed an associated stratiform cloud and precipitation area. The stratiform rain built up to a maximum amount over a period of 8 h, then gradually diminished over a 6 h period. This stratiform rain is estimated to have accounted for 32% of the squall system's total precipitation. As in other GATE squall lines, the upper-level cloud shield from which the stratiform rain fell, was advected slowly forward of the line during the system's lifetime, the leading line of convective clouds consisted of transient smaller-scale convective elements, which lent the line an irregular shape and pulsatory movement, and the stratiform portion of the system was characterized by the development of a

关键词： line THE GATE SQUAll lINE Of 9-10 AUGUST 1974 GMT lINE

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