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Using Bayesian deep learning approaches for uncertainty-aware building energy surrogate models

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Energy and AI 2021年第1期3卷 91-103页

作者： Paul westermann Ralph Evins Energy and Cities Group Department of Civil Engineering University of VictoriaCanada

Fast machine learning-based surrogate models are trained to emulate slow,high-fidelity engineering simulation models to accelerate engineering design *** introduces uncertainty as the surrogate is only an approxi-mation of the original *** methods can quantify that uncertainty,and deep learning models exist that follow the Bayesian *** models,namely Bayesian neural networks and Gaussian process models,enable us to give predic-tions together with an estimate of the model’s *** a result we can derive uncertainty-aware surrogate models that can automatically identify unseen design samples that may cause large emulation *** these samples the high-fidelity model can be queried *** paper outlines how the Bayesian paradigm allows us to hybridize fast but approximate and slow but accurate *** this paper,we train two types of Bayesian models,dropout neural networks and stochastic variational Gaussian Process models,to emulate a complex high dimensional building energy performance simulation *** surrogate model processes 35 building design parameters(inputs)to estimate 12 annual building energy perfor-mance metrics(outputs).We benchmark both approaches,prove their accuracy to be competitive,and show that errors can be reduced by up to 30%when the 10%of samples with the highest uncertainty are transferred to the high-fidelity model.

关键词： Surrogate modelling Metamodel Building performance simulation Uncertainty Bayesian deep learning Gaussian Process Bayesian neural network

Age Structure and Growth of Degraded Populus euphratica Floodplain Forests in North-west China and Perspectives for Their Recovery

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Journal of Integrative Plant Biology 2008年第5期50卷 536-546页

作者： Janneke westermann Stefan Zerbe Dieter Eckstein Technical University of Berlin Institute of EcologyRothenburgstraβe 12D-12165 BerlinGermany University of Greifswald Institute of Botany and Landscape EcologyGrimmer Straβe 88D-17487 GreifswaldGermany University of Hamburg Department of Wood ScienceDivision of Wood BiologyLeuschnerstraβe 91D-21031 HamburgGermany

The Populus euphratica floodplain forests along the lower reaches of the Tarim River in continental-arid Xinjiang （northwest China） have been declining in recent decades as a result of dam constructions and the withdrawal of water from the river. Since 2000, controlled flooding has been carried out to counteract this process of degradation. However, the consequences of a changing water regime for the floodplain ecosystem are not yet sufficiently investigated. In 2004 we sampled a total of 150 P. euphratica trees along two transects at the middle and lower reaches of the Tarim River to compare the age structure and growth of these two tree populations. The anthropogenic drawdown of the groundwater table had no effect on the average growth of the trees at the lower reaches. However, tree growth abruptly increased after controlled flooding, thus showing distinct signs of recovery.

关键词： arid land controlled flooding Euphrates poplar human impact Populus euphratica tree rings.

The role of Dicer1 in the male reproductive tract

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Asian Journal of Andrology 2015年第5期17卷 737-741,I0007页

作者： ida Bjorkgren Department of Physiology Institute of Biomedicine University of Turku Turku Finland Turku Doctoral Programme of Biomedical Sciences Turku Finland Department of Physiology Institute of Biomedicine University of Helsinki Helsinki Finland Laboratory Animal Centre University of Helsinki Helsinki Finland

Dicer1 is an RNase Ⅲ enzyme necessary for microRNA （miRNA） biogenesis, as it cleaves pre-miRNAs into mature miRNAs, miRNAs are important regulators of gene expression. In recent years, several miRNA-independent roles of Dicer1 have been identified. They include the production of endogenous small interfering RNAs, detoxifying retrotransposon-derived transcripts, and binding to new targets; messenger RNAs and long noncoding RNAs. Further, in this review, the functional significance of Dicer1 in the male reproductive tract is discussed. Conditional Dicer1 knock-out mouse models have demonstrated a requisite role for Dicer in male fertility. Deletion of Dicer1 from somatic or germ cells in the testis cause spermatogenic problems rendering male mice infertile. The lack of Dicer1 in the proximal epididymis causes dedifferentiation of the epithelium, with unbalanced sex steroid receptor expression, defects in epithelial lipid homeostasis, and subsequent male infertility. In addition, Dicer1 ablation from the prostate leads to increased apoptosis of the differentiated luminal cells, followed by epithelial hypotrophy of the ventral prostate. However, further studies are needed to clarify which functions of Dicer1 are responsible for the observed phenotypes in the male reproductive tract.

关键词： Dicer 1 epididymis prostate seminal vesicle testis vas deferens

Curing Kinetics of Tannin and Lignin Biobased Adhesives Determined by DSC and ABES

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Journal of Renewable Materials 2022年第8期10卷 2117-2131页

作者： Jaša Saražin ida Poljanšek Antonio Pizzi MilanŠernek University of Ljubljana Biotechnical FacultyLjubljana1000Slovenia Universitéde Lorraine LERMAB-ENSTIB Epinal88000France

The curing process of two biobased adhesives:pine tanninhexamine(TH)and organosolv lignin non-isocyanate polyurethane(NIPU),suitable for interior nonstructural use,were compared with commercial urea-formaldehyde(UF)*** in chemical structure before and after the curing process were observed with Fouriertransform infrared spectroscopy(FTIR).The process of adhesive curing was monitored with differential scanning calorimetry(DSC)and the automated bonding evaluation system(ABES).Both DSC and ABES measurements confirmed UF as the fastest and NIPU as the slowest curing adhesive *** into account the ABES results,the optimal pressing parameters for the TH adhesive would be 4 min at 175℃,for the NIPU adhesive 7 min at 200℃and for the UF 1.5 min at 100℃.Strong linear correlation was observed between mechanical and chemical curing for the UF and NIPU adhesives,whereas lower correlation was observed for the TH *** all observed adhesives,the DSC measurements were underestimating the curing process determined by ABES in the first part and overestimating it at the *** underestimation was the most evident with the TH adhesive and the less with the UF *** comparing the uncured and cured FTIR spectra of all three types of adhesives,a drastic decrease in the characteristic band of-OH groups at 3330–3400 cm^(−1)and an increase in the signal intensity at 2920 cm^(−1)of aliphatic-CH2-groups were *** the UF adhesive,the C=O stretching frequency has shifted from 1632 cm^(−1)for uncured to three different bands at 1766,1701,and 1655 cm^(−1)for cured *** sharp band for phenolic alcohols at 1236 cm^(−1)of C–O stretch and hydroxyl O–H functional group at 1009 cm^(−1)and at 684 cm^(−1)of uncured TH adhesive diminished during curing,which indicates that a crosslinking reaction occurs via-OH *** peak of the C=O group of urethane bridges at 1697 cm^(−1)for uncured NIPU shifted to lower wavenumber at 1633 cm^(−1)for cured NIPU.

关键词： Biobased adhesives curing kinetics tannin lignin ABES DSC FTIR

System security of hybrid AC-HVDC-systems challenges and new approaches for combined security assessment,preventive optimization and curative actions

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Global Energy Interconnection 2018年第5期1卷 585-594页

作者： Florian Sass Tom Sennewald Franz Linke Dirk westermann Power System Group Technische Universitat Ilmenau

The intense application of Voltage Source Converter based HVDC interconnections and grids will result in a hybrid AC-HVDC-system. The operation of such a system becomes complex regarding system security and system operation. This paper describes major challenges and proposes potential solutions, including a combined security assessment, preventive optimization and curative actions. A coordination of both systems enables an efficient application of existing transport capacity.

关键词： Hybrid AC-HVDC-systems Curative action System security Operational planning System operation

Supporting integrative maritime spatial planning by operationalising SEANERGY – a tool to study cross-sectoral synergies and conflicts

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International Journal of Digital Earth 2021年第6期14卷 678-695页

作者： ida Maria Bonnevie Henning Sten Hansen Lise Schrøder Department of Planning Aalborg UniversityCopenhagenDenmark

With growing pressures on marine ecosystems and on marine space,an increasingly needed strategy to optimise the use of marine space is to co-locate synergic marine human uses in close spatial–temporal proximity while separating conflicting marine human *** ArcMap toolbox SEANERGY is a new,cross-sectoral spatial decision support tool(DST)that enables maritime spatial planners to consider synergies and conflicts between marine uses to support assessments of co-location ***-sectoral approaches are important to reach more integrative maritime spatial planning(MSP)*** this article demonstrates through a Baltic Sea analysis,SEANERGY presents a crosssectoral use catalogue for MSP through enabling the tool users to answer important specific questions to spatially and/or numerically weight potential synergies/conflicts between marine *** article discusses to what degree such a cross-sectoral perspective can support integrative MSP *** MSP integrative challenges still exist,SEANERGY enables MSP processes to move towards developing shared goals and initiate discussions built on best available knowledge regarding potential use-use synergies and use-use conflicts for whole sea basins at once.

关键词： Coexistence integrative maritime spatial planning(MSP) SEANERGY spatial decision support tools(DSTs) use-use interactions

DNA identification of compromised samples with massive parallel sequencing

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Forensic Sciences Research 2019年第4期4卷 331-336页

作者： Andreas Tillmar ida Grandell Kerstin Montelius Department of Forensic Genetics and Forensic Toxicology National Board of Forensic MedicineLinköpingSweden Department of Clinical and Experimental Medicine Faculty of Health SciencesLinköping UniversityLinköpingSweden

Genetic profiling is a standard procedure for human identification,*** criminal cases and mass disasters,and has been proven to be an important part in the process in the repatriation of victims to their *** the event of a catastrophe whether it be a natural disaster,terror attack or accident,fatalities of many nationalities may be a consequence and international collaboration becomes *** DNA techniques used on a routine basis at forensic laboratories world-wide are very useful,and results reported from different labs are compared,making it possible to be matched in order to declare the identification of a *** calculations of possibilities of a random match are achievable since population data from many parts of the world are ***,decomposition and degradation of the remains are not uncommon in the aftermath of a catastrophe and hence it may be difficult to retrieve detailed DNA profiles from such *** parallel sequencing(MPS)is a technique capable of producing a vast amount of DNA sequence data in a high-through put manner,and panels of single nucleotide polymorphism(SNP)markers allow the amplification of small DNA fragments,often seen in compromised ***,we report the results from a set of 10 samples from missing person identification cases,analyzed with an MPS based method comprising 131 SNP markers and compared with direct reference material or buccal swab samples collected from relatives of the *** assess the weight of evidence of a match by statistical ***,we compare results reported on different platforms using different SNP panels,and conclude that more work has to be done if results from missing person identification cases analyzed on MPS with SNP panels at different laboratories are to be fully reliable and thus comparable.

关键词： Forensic science forensic genetics disaster victim identification massive parallel sequencing SNP mass disaster

Valorization of fruit waste from Cucurbitaceae family:Profiling of phytoconstituent of Benincasa hispida and Citrullus lanatus rinds using ultrasound-assisted extraction

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Food Bioscience 2023年第1期51卷 1317-1323页

作者： ida Madiha Yusoff Lee Suan Chua Zarani Mat Taher Herbal and Phytochemical Unit Institute of Bioproduct DevelopmentUniversiti Teknologi Malaysia81310UTM SkudaiJohor BahruJohorMalaysia Department of Bioprocess and Polymer Engineering School of Chemical and Energy EngineeringFaculty of EngineeringUniversiti Teknologi Malaysia81310UTM SkudaiJohor BahruJohorMalaysia

Food agricultural waste from fruit products such as rinds can be one source of environmental ***,the study was conducted to investigate the total phenolic content,total flavonoid content,antioxidant property,and chemical profiling using gas chromatography-mass spectrometer(GC-MS)and high-performance liquid chromatography tandem mass spectrometry of triple quadrupole(HP LCMS-MS QTOF).Ultrasoundassisted extraction for 45 min was used as a green technique to extract bioactive compounds from watermelon(Citrullus lanatus)and wintermelon(Benincasa hispida)*** total phenolic content and total flavonoid content of ultrasound-assisted extraction were compared with maceration *** revealed by the results,maceration technique had a lower total phenolic content for both *** rind(7.07±0.86μg GAE/mg)and *** rind(13.87±0.11μg GAE/mg)compared to ultrasound-assisted *** similar trends can be observed in total flavonoid content of *** rind(4.97±0.29μg RE/g)and *** rind(8.30±0.17μg RE/g)by maceration which showed a lower quantity compared to ultrasound-assisted *** ultrasound-assisted extraction was selected for further *** total phenolic content assay found that the *** rind extract exhibited higher total phenolic content values(23.39±0.22μg GAE/mg),than *** rind extract(15.10±0.58μg GAE/mg).*** rind extract had a higher total flavonoid content(11.17±0.17μg RE/g)than *** rind extract(6.16±0.09μg RE/g).The antioxidant activity was investigated using DPPH scavenging *** antioxidant capacity of *** rind extract(20872.19±1301.47 mg/mL)stronger compared to *** rind extract(23514.47±678.70 mg/mL).Results revealed that there was a negative correlation between total phenolic content,total flavonoid content,and DPPH scavenging activity *** phytoconstituent determination in *** and *** rind extract showed both contained phenolic,malic acid,and other co

关键词： Ultrasonic Fruit by-product Phenolic Flavonoid Antioxidant

Effect of additives on mercury partitioning in wet-limestone flue-gas desulfurization

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Clean Energy 2020年第2期4卷 132-141页

作者： ida Masoomi Barna Heidel Marc Oliver Schmid Gunter Scheffknecht Institute of Combustion and Power Plant Technology—IFK Department Fuels and Flue Gas CleaningUniversity of StuttgartPfaffenwaldring 23D-70569 StuttgartGermany Faculty Building service EnergyEnvironmentHochschule EsslingenUniversity of Applied ScienceFlandernstraße 101D-73732 EsslingenGermany

The wet-flue-gas desulfurization(FGD)process plays an important role in removing water-soluble flue-gas components such as sulphur dioxide(SO_(2))and oxidized mercury *** the reducing environment of the FGD,there is the possibility of re-emission of the already absorbed mercury(Hg)to the gas phase,which may be diminished by the utilization of specific *** this study,the effect of two different additives on Hg re-emission from the aqueous phase and Hg partitioning in gypsum and filtrate of a lab-scale wet-limestone FGD is ***,the behaviour of additives in the presence of different halides is *** studied additives are TMT 15■as a sulphidic precipitating agent,which forms non-soluble mercury compounds,and activated lignite(AL)as a carbon-based sorbent,which adsorbs Hg compounds from the aqueous *** 15■has no significant effect on SO_(2) absorption;on the other hand,addition of AL improves the SO_(2)-removal efficiency by up to 30%.Using both additives,Hg re-emission is suppressed in all the experimented cases except for AL in the absence of halides,in which Hg re-emission shows no ***,the need to form nucleophilic oxidized mercury compounds in the slurry for the adsorption of oxidized mercury on AL can be *** of both additives improves Hg retention in the slurry to different *** is shown that,for the additive-free slurries,the Hg-adsorption capacity of the solid fraction of the slurry is the limiting ***,the utilization of both additives results in a significant increase in the Hg concentration of solid *** correlation between redox potential and partitioning of Hg in the slurry is presented by comparing the change in the redox potential of slurries when additives are used.

关键词： fossil energy flue-gas cleaning flue-gas desulfurization mercury additives