检索结果-南通市图书馆

Identifying the validity domain of machine learning models in building energy systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy and AI 2024年第1期15卷 328-341页

作者： martin Rätz Patrick Henkel Phillip Stoffel Rita Streblow Dirk müller RWTH Aachen University E.ON Energy Research CenterInstitute for Energy Efficient Buildings and Indoor ClimateMathieustraβe 10Aachen52074Germany

The building sector significantly contributes to climate *** improve its carbon footprint,applications like model predictive control and predictive maintenance rely on system ***,the high modeling effort hinders practical *** learning models can significantly reduce this modeling *** ensure a machine learning model’s reliability in all operating states,it is essential to know its validity *** states outside the validity domain might lead to extrapolation,resulting in unpredictable *** paper addresses the challenge of identifying extrapolation in data-driven building energy system models and aims to raise knowledge about *** that,a novel approach is proposed that calibrates novelty detection algorithms towards the machine learning *** novelty detection algorithms are identified through a literature review and a benchmark test with 15 candidates.A subset of five algorithms is then evaluated on building energy ***,on two-dimensional data,displaying the results with a novel visualization *** on more complex multi-dimensional use *** methodology performs well,and the validity domain could be *** visualization allows for a profound analysis and an improved understanding of the fundamental effects behind a machine learning model’s validity domain and the extrapolation regimes.

关键词： Extrapolation detection Validity domain Novelty detection machine learning Artificial neural network Data-driven model predictive control Building energy systems

Calibration methodology for microscopic traffic simulation models of land ports of entry along the US-mexico border

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of modeling, Simulation, and Scientific Computing 2020年第3期11卷 40-59页

作者： David Salgado Peter T.martin Abhisek mudgal Rafael m.Aldrete Texas A&m Transportation Institute 4050 Rio Bravo Drive Suite 212El Paso 79912USA New mexico State University Engineering Complex II Rm.215Las Cruces 88003USA Indian Institute of Technology(BHU)Civil Engineering Department Varanasi 221011 Uttar PradeshIndia

Non-commercial Land Ports of Entry(LPOEs)are unique transportation facilities controlling the ingress and egress of passenger vehicles from mexico to the United States and vice *** calibration of microscopic traffic simulation models of non-commercial LPOEs requires a deep understanding of operational processes and driving behavior at these *** paper provides a methodology to guide modelers in calibrating microscopic traffic simulation models of non-commercial *** methodology establishes a common framework for modeling operational processes and traffic ***,the methodology includes the value of four state variables that characterizes operations of passenger vehicles at non-commercial *** variables are speed,acceleration,deceleration,and *** authors evaluated this methodology using the Otay mesa non-commercial LPOE as a case *** showed that this methodology could be potentially used to model non-commercial LPOEs along the US-mexico border and other border regions worldwide.

关键词： Land port of entry microsimulation calibration traffic models car-following models state variables

The macroeconomic effects of COVID‑19 in montenegro: a Bayesian VARX approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Financial Innovation 2020年第1期6卷 775-790页

作者： Gordana Djurovic Vasilije Djurovic martin m.Bojaj Faculty of Economics University of MontenegroBoulevard Jovana Tomasevica 3781000 PodgoricaMontenegro

This study examines,diagnoses,and assesses appropriate macroeconomic policy responses of the montenegrin Government to the outbreak of *** model econometrically measures the macroeconomic costs using a Bayesian VARX Litterman/minessota prior to the pandemic disease in terms of demand and supply loss due to illness and closed activities and their effects on GDP growth in various pandemic *** explore five economic scenarios—shocks—using the available data from January 2006 to December 2019,following real out-of-sample forecasts generated from January 2020 to December *** scenarios spanning January 2020 to June 2020 from±10 to±60%were *** observed what happens to the supply and demand sides,namely,GDP,tourism,capital stock,human capital,health expenditures,economic freedom,and *** results show a toll on the GDP,tourism,unemployment,capital stock,and especially human capital for *** recommended policy measures are public finance spending initiatives focused on securing employment and keeping highly qualified staff in montenegrin *** all uncertainties,the rebound of the montenegrin economy could take a few years to reach pre-COVID 19 output levels.

关键词： Pandemics Risk macroeconometrics Forecast

Unprecedented Retreat in a 50-Year Observational Record for Petermann Glacier, North Greenland

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2013年第5期6卷 259-265页

作者： Ola m. JOHANNESSEN mohamed BABIKER martin W. mILES Nansen Environmental and Remote Sensing Center Nansen Scientific Society Nansen-Zhu International Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Uni Research AS Bjerknes Centre for Climate Research

Petermann Glacier is a marine-terminating outlet glacier that had a 70 km-long floating ice tongue prior to a ～ 270 km2 calving event that was observed from satellite sensors in August 2010,shortening the ice tongue by ～ 27 ***,in July 2012,another 10 km was lost through *** order to understand these events in perspective,here the authors perform a long-term data analysis of Petermann Glacier calving-front variability and ice velocity for each year in the 1990s-2000s,supplemented by available observations from the previous three *** major （on the order of 100 krm2） calving events are identified,with ～ 153 km2 calved from 1959 to 1961,～ 168 km2 in 1991,～ 71 km2 in 2001,～ 270 km2 in 2010,and ～ 130 km2 in 2012-as well as ～ 31 k m2 calved in *** increased frequency of major calving events in recent years has left the front terminus position retreated nearly 25 km beyond the range of observed in previous *** contrast,stable ice-dynamics are suggested from ice-velocity measurements made each year between 1993-2012,which are on average 1063 m yr-1,with limited interannual variability and no significant trend; moreover,there is no apparent relationship between ice-velocity variability and calving *** degree to which the massive calving events in 2010 and 2012 represent natural episodic variability or a response to atmospheric and/or oceanic changes remains speculative; however,melt-induced weakening of the floating ice tongue in recent years is strongly suggested.

关键词： Greenland outlet glaciers iceberg calving satellite remote sensing

How can stream bank erosion be predicted on small water courses?Veri?cation of BANCS model on the Kubrica watershed

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2021年第3期36卷 419-429页

作者： Zuzana Allmanová máaria Vl?kováa martin Jankovsky michal Allman Jáan mergani? Department of Forest Harvesting Logistics and Ameliorations Faculty of Forestry Technical University in Zvolen Department of Forestry Technology and Constructions Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague

The current paper deals with the evaluation of the BANCS erosion prediction model and its two componentsethe Bank Erosion Hazard Index（BEHI） and Near-Bank Stress（NBS） indices. To construct the erosion prediction curves, 18 experimental sections were established on the Kubrica Stream, district of Trencín, Slovakia. Each section was assessed through the NBS index and BEHI index and real annual bank erosion was measured using erosion toe pins. Subsequently, the relations between the BEHI and real annual bank erosion was assessed through regression and correlation analyses. The relation proved to be moderately strong, with the correlation coefficient（R） reaching 0.47. Further, the relation between the NBS index and real annual bank erosion was evaluated, which was also moderately strong, with R= *** on the measured data, two erosion prediction curves were constructed, the first for moderate BEHI, with R= 0.69 and coefficient of determination（R2） of 0.47 and the second for high BEHI with R=0.74 and R2= 0.55. The prediction curves were based on data from one year of measurements and can, therefore, be used only for discharges that occurred within that year and in the region where the model was developed. In the current case, according to runoff Curve Numbers（CN）, the real culmination discharge was Q ? 1.88 m3/s, which is roughly equivalent to 1.5-year recurrence interval flow（Q1.5）.

关键词： Bank erosion Bank assessment for non-point source consequences of sediment (BANCS) Bank erosion hazard index Near-bank stress index Erosion prediction curves

THAI experimental research on hydrogen risk and source term related safety systems

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Energy 2021年第4期15卷 887-915页

作者： Sanjeev GUPTA martin FREITAG Gerhard POSS Becker Technologies GmbH Rahmannstrasse 11Eschborn 65760Germany

In the defense-in-depth concept employed for the safety of nuclear installations,maintaining integrity of containment as the last barrier is of high importance to limit the release of radioactivity to the environment in case of a severe *** active and passive safety systems implemented in containments of light water reactors(LWRs)are designed to limit the consequences of such *** the performance and reliability of such systems under accident conditions is critical to the safety of nuclear *** the aftermath of the Fukushima accident,there has been focus on re-examining the existing safety systems to demonstrate their capabilities for a broader range of boundary conditions comprising both the early as well as the late phases of an *** addition to the performance testing of safety systems,their interaction with containment atmosphere needs detailed investigations to evaluate the effects of operation of safety systems on H2 risk and fission product(FP)behavior in containment,which may ultimately have an impact on the source term to the *** this context,an extensive containment safety related experimental research has been conducted in a thermalhydraulics,hydrogen,aerosols,and iodine test facility(THAI,60 m3,single vessel)/(THAI+,80 m3,two interconnected vessels).Related to the subject of this paper,experimental investigations covered performance testing of various safety and mitigation systems,i.e.,containment spray,passive autocatalytic recombiner(PAR),pressure suppression pool(water pools),and effects of their operation on H2 risk and in-containment FP *** experimental results have provided a better phenomenological understanding and database for validation and further improvement of a safety analysis tool based on computation fluid dynamic(CFD)and lumped parameter(LP)modeling *** paper summarizes the main insights obtained from the aforesaid THAI experimental research covering safety systems

关键词： severe accident containment safety mitigation H2 risk source term

Addressing materials’microstructure diversity using transfer learning

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

npj Computational materials 2022年第1期8卷 223-235页

作者： Aurèle Goetz Ali Riza Durmaz martin müller Akhil Thomas Dominik Britz Pierre Kerfriden Chris Eberl Fraunhofer Institute for mechanics of materials IWm 79108FreiburgGermany mines ParisTech PSL University Centre des Matériaux91000EvryFrance University of Freiburg 79110FreiburgGermany Department of materials Science Saarland UniversitySaarbrücken66123Germany material Engineering Center Saarland 66123SaarbrückenGermany Cardiff University School of EngineeringCardiffUK

materials’microstructures are signatures of their alloying composition and processing ***,quantitative analyses of microstructural constituents were lately accomplished through deep learning ***,their shortcomings are poor data efficiency and domain generalizability across data sets,inherently conflicting the expenses associated with annotating data through experts,and extensive materials *** tackle both,we propose to apply a sub-class of transfer learning methods called unsupervised domain adaptation(UDA).UDA addresses the task of finding domain-invariant features when supplied with annotated source data and unannotated target data,such that performance on the latter is ***,this study is conducted on a lath-shaped bainite segmentation task in complex phase steel *** to bridge are selected to be different metallographic specimen preparations and distinct imaging *** show that a state-of-the-art UDA approach substantially fosters the transfer between the investigated domains,underlining this technique’s potential to cope with materials variance.

关键词： microstructure alloying bainite

Genomic mosaicism of the Brain:Origin,Impact,and Utility

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2024年第6期40卷 759-776页

作者： Jared H.Graham Johannes C.m.Schlachetzki Xiaoxu Yang martin W.Breuss Department of Pediatrics Section of Clinical Genetics and MetabolismUniversity of Colorado School of MedicineAurora80045-2581COUSA Department of Cellular and molecular medicine University of California San DiegoLa Jolla92093-0021San DiegoCAUSA Department of Neurosciences University of California San DiegoLa Jolla92093-0021San DiegoCAUSA Rady Children’s Institute for Genomic medicine San Diego92123CAUSA

Genomic mosaicism describes the phenomenon where some but not all cells within a tissue harbor unique genetic ***,research focused on the impact of genomic mosaicism on clinical phenotype—motivated by its involvement in cancers and overgrowth *** recently,we increasingly shifted towards the plethora of neutral mosaic variants that can act as recorders of cellular lineage and environmental ***,we summarize the current state of the field of genomic mosaicism research with a special emphasis on our current understanding of this phenomenon in brain development and *** the field of genomic mosaicism has a rich history,technological advances in the last decade have changed our approaches and greatly improved our *** will provide current definitions and an overview of contemporary detection approaches for genomic ***,we will discuss the impact and utility of genomic mosaicism.

关键词： Genomics Brain development Brain homeostasis Genomic mosaicism

Development of an inflatable solar dryer for improved postharvest handling of paddy rice in humid climates

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2017年第3期10卷 269-282页

作者： Ana Salvatierra-Rojas marcus Nagle martin Gummert Tom de Bruin Joachim müller Institute of Agricultural Engineering Tropics and Subtropics GroupUniversität HohenheimGarbenstrasse 9Stuttgart 70599Germany Postharvest Development Program International Rice Research Institute(IRRI)Los Baños 4031Philippines GrainPro Philippines Inc. Subic Bay 2222Philippines

Rice is the staple food for more than three billion people *** considerable progress has been made with respect to improved breeds and production practices,losses during postharvest handling remain *** and storage of paddy are two key stages where management can be *** rice,grain moisture content of 14%prevents microbiological activity,while a level of about 12%minimizes quality losses over prolonged storage *** to the need for simple and economical technologies,an inflatable solar dryer(ISD)was developed based on adaptations of the Hohenheim-type solar tunnel *** form a drying tunnel,transparent polyethylene(PE)film attaches by zipper to a reinforced black polyvinyl chloride(PVC)*** reduce heat loss,a flexible multilayer floor was used along the drying *** tunnel does not need a substructure as it is stabilized adequately from pressure created by two axial flow *** experiments,paddy was spread on the floor and mixed with a special roller *** ISD has been evaluated for paddy in the Philippines during both rainy and dry seasons and was subsequently *** drying and shade drying were carried out in parallel for comparison and product was evaluated for moisture content and quality in terms of milling recovery and head rice *** content was reduced from 23%to 14%within 26-52 h of continuous operation during the rainy season and 16%to 14%within 4-26 h of drying during the dry *** both seasons,the final moisture content of 12%was reached after prolonged drying *** was not found to be affected with respect to drying *** ISD showed advantages over sun drying,despite longer drying periods.

关键词： paddy rice postharvest handling solar dryer mobile dryer collapsible dryer Philippines