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Hybrid Short-term Load Forecasting Method Based on Empirical Wavelet Transform and Bidirectional Long Short-term Memory Neural Networks

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Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1216-1228页

作者： Xiaoyu Zhang stefanie kuenzel Nicolo Colombo Chris Watkins School of Artificial Intelligence Anhui UniversityHefei 230601China Department of Electronic Engineering Royal HollowayUniversity of LondonEgham HillEgham TW20 OEXUK Department of Computer Science Royal HollowayUniversity of LondonEgham HillEgham TW200EXUK

Accurate short-term load forecasting is essential to modern power systems and smart grids. The utility can better implement demand-side management and operate power system stably with a reliable load forecasting system. The load demand contains a variety of different load components, and different loads operate with different frequencies. The conventional load forecasting methods, e.g., linear regression(LR), auto-regressive integrated moving average(ARIMA), deep neural network, ignore the frequency domain and can only use time-domain load demand as inputs. To make full use of both time-domain and frequency-domain features of the load demand, a load forecasting method based on hybrid empirical wavelet transform(EWT) and deep neural network is proposed in this paper. The proposed method first filters noises via wavelet-based denoising technique, and then decomposes the original load demand into several sub-layers to show the frequency features while the time-domain information is preserved as well. Then, a bidirectional long short-term memory(LSTM) method is trained for each sub-layer independently. In order to better tune the hyperparameters, a Bayesian hyperparameter optimization(BHO) algorithm is adopted in this paper. Three case studies are designed to evaluate the performance of the proposed *** the results, it is found that the proposed method improves the prediction accuracy compared with other load forecasting method.

关键词： Load forecasting empirical wavelet transform(EWT) recurrent neural network data denoising Bayesian hyperparameter optimization(BHO)

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Simultaneous determination of five anti-epilepsy drugs in human plasma using liquid chromatography-mass spectrometry

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Science China Chemistry 2010年第11期53卷 2373-2378页

作者： stefanie WeiBig Institute of Pharmaceutical Analysis College of PharmacyWuhan University

A new liquid chromatography-mass spectrometry method for the determination of carbamazepine,clonazepam,alprazolam,estazolam and phenytoin in human plasma has been developed by using diazepam as an internal *** separation was performed on a Zorbax SB-C18 column(30 mm × 2.1 mm,3.5 ?m) with a mobile phase consisting of methanol and aqueous 25 mM ammonium acetate using gradient elution.A diethyl ether extraction method was used for the extraction of five anti-epilepsy *** final extract was injected for analysis by LC-MS/*** method was validated within the concentration range of 50-5000 ng mL-1 for five anti-epilepsy *** precision of the assay(RSD%) was less than 10% at all concentration levels within the tested *** method recoveries for all samples were more than 90%.The results indicate that the method is specific,sensitive and accurate,and suitable to study the pharmacokinetics,to adjust the dosage for individual administration,and to monitor the drug-concentration and drug abuse of the five anti-epilepsy drugs.

关键词： liquid chromatography-mass spectrometry anti-epilepsy drugs plasma concentration

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View on microRNAs as a potential tool to fight blindness: focus on Müller glia and gliosis

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Neural Regeneration Research 2022年第7期17卷 1501-1502页

作者： stefanie Gabriele Wohl The State University of New York College of OptometryDepartment of Biological and Vision SciencesNew YorkNYUSA

The neural retina is a part of the central nervous *** it lacks regenerative capacity,in an event of injury or disease,neuronal loss leads to visual impairment and often to ***,Müller glia(MG),the predominant glia in the retina,undergo a variety of molecular and cellular changes and discontinue to carry out their important regular functions in the tissue(e.g.,maintaining tissue homeostasis and nurturing neurons).

关键词： homeostasis predominant carry

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A Survey on 360°Images and Videos in Mixed Reality:Algorithms and Applications

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Journal of Computer Science & Technology 2023年第3期38卷 473-491页

作者：张方略赵军红张赟 stefanie Zollmann School of Engineering and Computer Science Victoria University of WellingtonWellington 6012New Zealand College of Media Engineering Communication University of ZhejiangHangzhou 310018China Department of Computer Science University of OtagoDunedin 9054New Zealand

Mixed reality technologies provide real-time and immersive experiences,which bring tremendous opportunities in entertainment,education,and enriched experiences that are not directly accessible owing to safety or *** research in this field has been in the spotlight in the last few years as the metaverse went *** recently emerging omnidirectional video streams,i.e.,360°videos,provide an affordable way to capture and present dynamic real-world *** the last decade,fueled by the rapid development of artificial intelligence and computational photography technologies,the research interests in mixed reality systems using 360°videos with richer and more realistic experiences are dramatically increased to unlock the true potential of the *** this survey,we cover recent research aimed at addressing the above issues in the 360°image and video processing technologies and applications for mixed *** survey summarizes the contributions of the recent research and describes potential future research directions about 360°media in the field of mixed reality.

关键词： 360°image mixed reality 360°image processing virtual reality scene reconstruction virtual reality content manipulation

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Improving genomic tools for outcrossing crops

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Molecular Plant 2021年第4期14卷 538-540页

作者： Cathy Jubin stefanie Griebel Timothy Beissinger Division of Plant Breeding Methodology&Center for Integrated Breeding Research Department of Crop ScienceUniversity of Gottingen37075

For decades,practical limitations and cost have created a bias in plant genetic studies toward species that tolerate self *** important work by Chen et al.(2021)in this issue provides key tools to overcome this bias a... 详细信息

关键词： crops breeding overcome

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In vivo bioluminescence imaging to elucidate stem cell graft differentiation

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Neural Regeneration Research 2020年第1期15卷 61-62页

作者： stefanie Vogel Mathias Hoehn Markus Aswendt Technische Universitat Dresden DFG-Research Center for Regenerative Therapies Dresden(CRTD)DresdenGermany Cognitive Neuroscience Institute of Neuroscience and Medicine(INM-3)Research Center JuelichJuelichGermany Leiden University Medical Center Department of RadiologyLeidenThe Netherlands University of Cologne Faculty of Medicine and University Hospital CologneDepartment of NeurologyCologneGermany

Neurological disorders including neurodegeneration(e.g.,Alzheimer’s disease and Parkinson’s disease)and acute injuries(e.g.,stroke and traumatic brain injury)are the leading cause group of disability-adjusted life years and the second leading cause group of *** to other tissues,the adult brain retains only a very limited repair *** neurogenesis,the lifelong generation of new neurons,declines with age and in degenerative diseases,such as Alzheimer’s ***,independently of age,the proliferation and migration of endogenous stem cells is stimulated after brain injuries and might be related to recovery processes(Adamczak et al.,2017).The limited number of endogenous stem cells during adulthood is one of the major limitations for an efficient regeneration of the injury affected brain ***,the transplantation of neural stem or progenitor cells(NSCs/NPCs)is extensively studied in mouse models and applied in first clinical trials with the aim to replace dysfunctional or lost neural cells and thus to restore brain function.

关键词： injuries endogenous replace

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BETWEEN BYZANTINE AND MUSLIM *** ECONOMIC RESOURCES FOR AN EMBRYONIC EMPIRE

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Journal of Ancient Civilizations 2020年第2期35卷 241-266,268页

作者： stefanie Schmidt University of Zurich/FU Berlin

Building an Empire involves more than just the occupation of foreign *** needs an economic strategy to sustainably exploit the resources of a country and to keep resistance among the inhabitants to a *** paper aims at exploring how,after the conquest of Egypt in 642,Muslims mobilized economic resources,to what extent they integrated former Byzantine levy systems,and what incentives they created in order to guarantee the economy's continued productivity.

关键词： occupation guarantee continued

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Effect of welding parameters on the heat-affected zone of AISI409 ferritic stainless steel

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International Journal of Minerals,Metallurgy and Materials 2012年第10期19卷 923-929页

作者： Eslam Ranjbarnodeh stefanie Hanke Sabine Weiss Alfons Fischer Young Researchers Club(East Tehran Branch) Islamic Azad UniversityTehran 33955-163Iran Materials Science and Engineering University of Duisburg-EssenDuisburg 47057Germany

One of the main problems during the welding of ferritic stainless steels is severe grain growth within the heat-affected zone （HAZ） In the present study, the microstmctural characteristics of tungsten inert gas （TIG） welded AISI409 ferritic stainless steel were investigated by electron backscattered diffraction （EBSD）, and the effects of welding parameters on the grain size, local misorientation, and low-angle grain boundaries were studied. A 3-D finite element model （FEM） was developed to predict the effects of welding parameters on the holding time of the HAZ above the critical temperature of grain growth. It is found that the base metal is not fully recrystallized. During the welding, complete recrystallization is followed by severe grain growth. A decrease in the number of low-angle grain boundaries is observed within the HAZ. FEM results show that the final state of residual sWains is caused by competition between welding plastic strains and their release by recrystallization. Still, the decisive factor for grain growth is heat input.

关键词： ferritic stainless steel welding heat affected zone recrystallization grain growth finite element method

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EARLY ROMAN SYENE(1ST TO 2ND CENTURY)–A GATE TO THE RED SEA?

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Journal of Ancient Civilizations 2021年第2期36卷 269-297,301页

作者： stefanie Schmidt FU Berlin

Due to its strategic position at the First Cataract,Syene(modern Aswān)obtained a central position in transregional trade at Egypt’s border to the Meroitic *** finds of Aswān pottery throughout Egypt and the Arabian Sea demonstrate,moreover,that Syene’s economic outreach went far beyond a mere cross-border *** on a new discussion of a well-known inscription by a paralēmptēs of the Red Sea and an ostracon from Pselkis,this paper aims at exploring to what extent early Roman Syene was also involved in trade carried out in the Red Sea and beyond.

关键词： border beyond Egypt

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A Sub-element Adaptive Shock Capturing Approach for Discontinuous Galerkin Methods

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Communications on Applied Mathematics and Computation 2023年第2期5卷 679-721页

作者： Johannes Markert Gregor Gassner stefanie Walch Department for Mathematics and Computer Science University of CologneWeyertal 86-9050931 CologneGermany Department for Mathematics and Computer Science Center for Data and Simulation ScienceUniversity of CologneWeyertal 86-9050931 CologneGermany I.Physikalisches Institut Center for Data and Simulation ScienceUniversity of CologneZülpicher Str.7750937 CologneGermany

In this paper,a new strategy for a sub-element-based shock capturing for discontinuous Galerkin(DG)approximations is *** idea is to interpret a DG element as a col-lection of data and construct a hierarchy of low-to-high-order discretizations on this set of data,including a first-order finite volume scheme up to the full-order DG *** dif-ferent DG discretizations are then blended according to sub-element troubled cell indicators,resulting in a final discretization that adaptively blends from low to high order within a single DG *** goal is to retain as much high-order accuracy as possible,even in simula-tions with very strong shocks,as,e.g.,presented in the Sedov *** framework retains the locality of the standard DG scheme and is hence well suited for a combination with adaptive mesh refinement and parallel *** numerical tests demonstrate the sub-element adaptive behavior of the new shock capturing approach and its high accuracy.

关键词： High-order methods Discontinuous Galerkin spectral element method Finite volume method Shock capturing Astrophysics Stellar physics

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