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Factorizations of groups and related topics

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Science China Mathematics 2009年第2期52卷 217-230页

作者： AMBERG bernhard KAZARIN Lev Fachbereich 08 Universitaet MainzGermany Department of Mathematics Yaroslavl State University

This is a survey of some recent progress in the theory of groups with factorizations. Some of the methods can be used to obtain information about finite groups in general, nilpotent algebras and nearrings.

关键词： products of groups factorizations 20D40

What actually is the Münch hypothesis?A short history of assimilate transport by mass flow

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Journal of Integrative Plant Biology 2017年第5期59卷 292-310页

作者： Michael Knoblauch Winfried S.peters School of Biological Sciences Washington State UniversityPullmanWashington 99164USA

In the 192os, the German forestry scientist Ernst M{Jnch postulated that photo-assimilate transport is a mass flow driven by osmotically induced pressure gradients between source organs （high turgot） and sink organs （lower turgor）. Two crucial components of MOnch＇s hypothesis, the translocation by mass flow from sources to sinks and the osmotic mechanism of pressure flow, were established notions at the time, but had been developed by two institutionally separated groups of scholars. A conceptual separation of wholepplant biology from cellular physiology had followed the institutional separation of forestry science from botany in German-speaking central Europe during the so-called Humboldtian reforms, and was reinforced by the delayed institutionalization of plant physiology as an academic discipline. Munch did not invent a novel concept, but accomplished an integration of the organism-focused and the cell-focused research traditions, reducing the polarization that had evolved when research universities emerged in central Europe. Post-Munch debates about the validity of his hypothesis focused increasingly on the suitability of available research methodologies, especially the electron microscope and the proper interpretation of the results it produced. The present work reconstructs the influence of the dynamic scientific and non-scientific context on the history of the Munch hypothesis.

关键词： William J. Lucas University of California Davis USA

Modelselection,adaptation,and combination for transfer learning in wind and photovoltaic power forecasts

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Energy and AI 2023年第4期14卷 31-42页

作者： Jens Schreiber bernhard Sick University of Kassel Wilhelmshöher Allee 7334121 KasselGermany

There is recent interest in using model hubs–a collection of pre-trained models–in computer vision *** employ a model hub,we first select a source model and then adapt the model for the target to compensate for *** still needs to be more research on model selection and adaption for renewable power *** particular,none of the related work examines different model selection and adaptation strategies for neural network ***,none of the current studies investigates the influence of available training samples and considers seasonality in the *** close these gaps by conducting the first thorough experiment for model selection and adaptation for transfer learning in renewable power forecast,adopting recent developments from the field of computer vision on 667 wind and photovoltaic parks from six *** simulate different amounts of training samples for each season to calculate informative forecast *** examine the marginal likelihood and forecast error for model selection for those ***,we study four adaption *** an extension of the current state of the art,we utilize a Bayesian linear regression for forecasting the response based on features extracted from a neural *** approach outperforms the baseline with only seven days of training data and shows that fine-tuning is not beneficial with less than three months of *** further show how combining multiple models through ensembles can significantly improve the model selection and adaptation approach such that we have a similar mean error with only 30 days of training data which is otherwise only possible with an entire year of training *** achieve a mean error of 9.8 and 14 percent for the most realistic dataset for PV and wind with only seven days of training data.

关键词： Transfer learning Time series Renewable energies Temporal convolutional neural network Ensembles Wind and photovoltaic power

Divergent foraging behavior in a hybrid zone： Darwin＇s tree finches （Camarhynchus spp.） on Floreana Island

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Current Zoology 2015年第1期61卷 181-190页

作者： Katharina J. peters Sonia KLEINDORFER School of Biological Sciences Flinders University GPO Box 2100 Adelaide 5001 Australia

Hybrid speciation is increasingly recognized as a mechanism for novel evolutionary trajectories. However, we know very little about the ecology of a contact zone that has arisen in sympatry. This study examines the foraging behavior and fitness of two species of Darwin＇s tree finches （Camarhynchus parvulus, C pauper） and hybrid offspring on Floreana Island. Previous study showed that the percentage of hybrids in the tree finch population increased from 19% in 2005 to 41% in 2010, and their body and beak size increased by -5% （parental phenotype did not change）. In 2005-2006, all three tree finch groups （two paren- tal species and hybrid birds） used the same foraging substrate, technique, and height. By 2010-2013, the small tree finch C. par- vulus had changed its foraging technique and the medium tree finch C. pauper had changed its foraging height. Both parental species had higher body condition when foraging at （divergent） mean foraging heights per species but hybrid birds did not. We discuss the implications of conserving forest to facilitate vertical niche expansion and the role of hybridization for genetic persis- tence [Current Zoology 61 （1）： 181-190, 2015].

关键词： Hybridization Speciation Adaptive radiation Conservation Scalesia Ecological niche

Critiquing and Joining Intersections of Disaster,Conflict,and Peace Research

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International Journal of Disaster Risk Science 2020年第5期11卷 555-567页

作者： Laura E.R.peters Ilan Kelman College of Earth.Ocean and Atmospheric SciencesOregon State UniversityCorvallis.OR 97331USA Institute for Risk and Disaster Reduction and Institute for Global HealthUniversity College LondonLondon WC1E 6BT.UK University of Agder.4630 Kristiansand Norway

Disaster research,conflict research,and peace research have rich and deep histories,yet they do not always fully intersect or learn from each other,even when they investigate if and how disasters lead to conflict or *** has tended to focus on investigating causal linkages between disaster(including those associated with climate change)and conflict,and disaster diplomacy emerged as a thread of explanatory research that investigates how and why disaster-related activities do and do not in fluence peace and ***,definitive conclusions on the disaster-conflict-peace nexus have evaded scientific consensus,in part due to conceptual,methodological,and interpretive differences among *** article highlights that this nexus would benefit from a more robust engagement with each field's foundational research that explores beyond binary and crude *** are concepts of destructive and constructive conflict;direct,structural,and cultural violence,and their relationships to vulnerability;negative and positive peace;and the ideals and realities of peacebuilding and conflict *** article demonstrates how integrated scholarship could open up and advance new lines of questioning,with implications for developing cohere nt research,policy,and *** article concludes by offering recommendations for how to better connect disaster,conflict,and peace research.

关键词： Climate change Conflict research Disaster diplomacy Disaster risk reduction Peace research

Escape to the high canopy thermal deficiency causes niche expansion in a forest-floor ant

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Insect Science 2017年第4期24卷 699-707页

作者： bernhard Seifert Patrick Fiedler Roland Schultz Senckenberg Museum of Natural History Gorlitz 02826 Gorlitz Germany Faculty of Environmental Sciences Technical University Dresden 01069 Dresden Germany

The small formicoxenine ant Temnothorax saxonicus was known from about 40 localities in Central Europe nesting in anorganie substrates on floor of xerothermous forests whereas investigations of 198 tree canopies in 19 forest sites of the same region provided no indication for arboreal nesting or foraging. We present the first evidence for canopy-nesting populations of T. saxonicus on old Quercus trees in 3 sites having maximum calibrated topsoil temperatures of 17.9 ± 0.3 ℃ which were significantly （P 〈 0.007） lower than 22.8 ± 2.0 ℃ measured in 5 sites with ground-nesting populations. The thermal deficit on forest floor inhibits brood development in ground nests and caused a moving to canopy were maximum calibrated temperatures of the, now wooden, substrates are at least 26.1 ℃for the whole canopy and 30.8 ℃ in more sun-exposed spots. T. saxonieus competed here successfully with the obligatory canopy ants T. affinis and T. cortiealis. The distributional data of this rope-climbing study support former results that highest nest densities of small arboreal ants occur in temperate climate over the entire canopy mantle of single trees situated in open land or in park-like environments but occur in the top of the canopy in tree stands with high degree of canopy closure.

关键词： canopy temperature foraging distance microhabitat selection soil temper-ature soil temperature calibration Temnothorax

Bioorganic Municipal Waste Management to Deploy a Sustainable Solid Waste Disposal Practice in China

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过程工程学报 2006年第2期6卷 255-260页

作者： bernhard Raninger Werner Bidlingmaier 李润东冯磊 Mining University Leoben A–8700 Leoben Austria CIM D- 60325 Frankfurt am Main Germany Int. Transfer Center Environ. Technol. Inst. at Bauhaus Univ. Weimar Weimar D-99423 Germany Inst. Clean Energy & Environ. Eng. (ICEEE) Hangkong University

The utilization of bioorganic municipal waste (BMW) is considered essentially for the further development of integrated waste management practice in China. Awareness and knowledge about the importance of BMW management and source separation of waste on household level, as a precondition for the implementation of an economically feasible integrated waste management infrastructure, were developed in Europe during the last decade. The Sino–German RRUBMW Project is facilitating applied research investigations in 4 pilot areas in Shenyang to assess the population’s behavior to develop the design criteria for appropriate process technologies and to provide the basis to adopt BMW management policy in China.

关键词：有机废水废水处理堆肥沼气

Real-time raster projection for web maps

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International Journal of Digital Earth 2016年第3期9卷 215-229页

作者： bernhard Jenny Bojan Šavrič Johannes Liem College of Earth Oceanand Atmospheric SciencesOregon State UniversityCorvallisORUSA

The virtual globe is the default visualization for Digital Earth applications,but it can only show one half of the *** article introduces user-adjustable,on-the-fly projection of georeferenced raster images for web mapping and web GIS *** technique allows users to center a map on arbitrary locations,while still seeing the entire Earth *** web mapping libraries can apply map projection transformations to vector data in the browser,but they do not currently support the projection of raster images at interactive frame *** use the cross-platform WebGL(Web Graphics Library)graphics pipeline for hardware-accelerated projection of raster data in web *** algorithmic techniques–inverse per-fragment projection,and combined forward per-triangle and inverse per-fragment projection–for georeferenced raster imagery are *** resulting raster maps combine the ease of use and flexibility of interactive virtual globes with the ability to show the entire *** adjustable projection of raster imagery allows users to observe global phenomena that are difficult to visualize on virtual globes or traditional maps with static projections.

关键词： map projection raster projection WebGL

Geometric Counting on Wavefront Real Spherical Spaces

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Acta Mathematica Sinica,English Series 2018年第3期34卷 488-531页

作者： bernhard KROTZ Eitan SAYAG Henrik SCHLICHTKRULL Universitat Paderborn Institut Jur MathematikWarburger Strafle 10033098 PaderbornDeutschland Department of Mathematics Ben Gurion University of the NegevP.O.B.653Be'er Sheva 84105Israel Department of Mathematics University of CopenhagenUniversitetsparken 5DK-2100 Copenhagen ODenmark

We provide L^p-versus L~∞-bounds for eigenfunctions on a real spherical space Z of wavefront type. It is shown that these bounds imply a non-trivial error term estimate for lattice counting on Z. The paper also serve... 详细信息

关键词： Homogeneous spaces real spherical spaces lattice counting error term wavefront lemma spectral analysis norm comparison of eigenfunctions