检索结果-南通市图书馆

Particuology 2024年第9期92卷 113-125页

作者： Yuan tan Michael Rackl Weijie Yang Johannes Fottner Wenjun Meng Stephan kessler technical University of Munich Chair for Materials HandlingMaterial FlowLogisticsGarchingGermany Ibracon–Ingenieurbüro Dr.-Ing.Rackl ZornedingGermany School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuanChina

this part of the study aims to evaluate the advantages and disadvantages of technical standards of screw conveyors in China,Germany,and the USA for industrial *** source or determination method of empirical coefficients as well as the theoretical foundation of dimensioning-relevant diagrams in these standards is not explicitly documented in the ***,instead of less efficient on-site tests,the numerical simulation by discrete element method is *** on the geometrical and operational designs determined in three standards for horizontal,slightly inclined,and vertical conveyance of three representative bulk solids(barley,lignite,and sand),the potential influencing factors are *** constant particle and contact parameters,the potential deviations caused by particle models are ***,the accuracy of power consumption calculation of each standard and the divergence between accessible and required mass flows is comprehensively assessed based on the analysis of simulated *** main conclusions are drawn:(1)Particle fall back is barely considered by all three standards and leads to overestimated mass throughput;(2)the decrease in mass throughput caused by an increasing degree of filling can be compensated by slowing down the rotational speed.

关键词： Discrete element method Design standard Screw conveyor Screw auger Bulk solid

Optical probing of ultrafast laser-induced solid-to-overdense-plasma transitions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第5期13卷 973-984页

作者： Yasmina Azamoum Georg Alexander Becker Sebastian Keppler Guillaume Duchateau Stefan Skupin Mickael Grech Fabrice Catoire Sebastian Hell Issa tamer Marco Hornung Marco Hellwing Alexander kessler Franck Schorcht Malte Christoph Kaluza GSI helmholtzzentrum für Schwerionenforschung Planckstr.164291 DarmstadtGermany. helmholtz Institute Jena Fröbelstieg 307743 JenaGermany. Institute of Optics and Quantum Electronics Friedrich-SchillerUniversität JenaMax-Wien-Platz 107743 JenaGermany. CEA-CEStA 15 Avenue des SablièresCS6000133116 Le BarpCedexFrance Institut Lumière Matière UMR 5306-CNRSUniversitéde Lyon 169622 VilleurbanneFrance. LULI CNRSCEASorbonne UniversitéInstitut Polytechnique de ParisPalaiseauFrance. Universitéde Bordeaux-CNRS-CEA CELIAUMR 5107 TalenceFrance

Understanding the solid target dynamics resulting from the interaction with an ultrashort laser pulse is a challenging fundamental multi-physics problem involving atomic and solid-state physics,plasma physics,and laser *** of the initial interplay of the underlying processes is essential to many applications ranging from lowpower laser regimes like laser-induced ablation to high-power laser regimes like laser-driven ion *** the properties of the so-called pre-plasma formed as the laser pulse’s rising edge ionizes the target is complicated from the theoretical and experimental point of view,and many aspects of this laser-induced transition from solid to overdense plasma over picosecond timescales are still open *** the one hand,laser-driven ion acceleration requires precise control of the pre-plasma because the efficiency of the acceleration process crucially depends on the target properties at the arrival of the relativistic intensity peak of the *** the other hand,efficient laser ablation requires,for example,preventing the so-called“plasma shielding”.By capturing the dynamics of the initial stage of the interaction,we report on a detailed visualization of the pre-plasma formation and ***-thin diamond-like carbon foils are shown to transition from solid to plasma during the laser rising edge with intensitiest near-infrared probe transmission measurements evidence sub-picosecond dynamics of an expanding plasma with densities above 10^(23)cm^(−3)(about 100 times the critical plasma density).the complementarity of a solid-state interaction model and kinetic plasma description provides deep insight into the interplay of initial ionization,collisions,and expansion.

关键词： laser acceleration solid

深度神经网络结合迁移学习和基因遗传算法加速金属团簇结构全局优化

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2024年第2期37卷 321-329,I0010-I0021,I0104页

作者：杨祁李子玉 Peter L.Rodriguez-kesslerbr 何圣贵中国科学院化学研究所动态与稳态结构化学国家重点实验室北京100190 墨西哥光学研究中心瓜纳华托37150 中国科学院大学北京100049 北京分子科学国家研究中心中国科学院分子科学科教融合卓越创新中心北京100190

在团簇科学中,搜索金属团簇的全局最小能量结构具有重要的意义.最近,深度神经网络结合迁移学习的全局优化方法被开发出来,以提高金属团簇结构的优化效率,该方法可以大幅减少训练深度神经网络所需的样本数量.为了进一步提高势能面的采样... 详细信息

在团簇科学中,搜索金属团簇的全局最小能量结构具有重要的意义.最近,深度神经网络结合迁移学习的全局优化方法被开发出来,以提高金属团簇结构的优化效率,该方法可以大幅减少训练深度神经网络所需的样本数量.为了进一步提高势能面的采样效率和深度神经网络结合迁移学习的全局优化方法的全局搜索能力,本文提出了一种将基因遗传算法嵌入到深度神经网络结合迁移学习中的全局优化方法.在Pt_(n)(n=9-15)团簇的全局优化中,该方法只需要深度神经网络结合迁移学习的全局优化方法一半的样本数量就能优化得到全局最优结构,同时节省了约70%~80%的计算成本,这表明全局搜索能力的显著提升。在Pt_(14)团簇势能面上的采样结果显示,该方法搜索到低能量的样本(占比25%)比深度神经网络结合迁移学习方法的样本(占比t_(16)和Pt_(17)团簇的全局最优结构搜索中,本文报道了文献中尚未报道的新结构,证明本论文建立的方法的可行性和先进性.

关键词：全局优化深度神经网络迁移学习基因遗传算法金属团簇铂

Study on the Bleaching Mechanism of Indigo-carmine Catalyzed by Laccase Using EFA and MCR-ALS Methods

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2003年第5期14卷 505-508页

作者： HuaLI FangZHANG W.kessler R.W.kessler InwtituteofAnalyticalScience NorthwestUniversityXi‘an710069 InstituteofAppliedResearch ReutlingenUniversityofAppliedSciencesAlteburgstrasse150D-72760ReutlingenGermany

the bleaching of indigo-carmine catalyzed by laccase was monitored on-line by UV/Vis spectroscopy. the resulted data were analyzed by evolving factor analysis (EFA) and multivariate curve resolution (MCR), and the re... 详细信息

关键词： Chemometrics process analysis EFA MCR-ALS.

维普期刊数据库

AN ECOSYStEM MODEL ANALYSIS OF tHE EFFECt OF MINE tAILINGS ON tHE EUPHOtIC ZONE OF A PELAGIC ECOSYStEM

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 1986年第03期5卷 425-436页

作者： t.R.PARSONS,t.A.kessler,AND LI GUANGUO Department of Oceanography University of British Columbia Vancouver British Columbia Canada Department of Oceanography University of British Columbia Vancouver British Columbia Canada Shandong College of Oceanology Qingdao China

A computer analysis was performed on experimental results obtained when mine tailings were added to seawater. the Mixed Upper-Layer Ecotrophie Simulation (MULES) model was tested by changing the extinction coefficient and the abundance of heterotrophic zooflagellates. Increasing the extinction coefficient resulted in a delay of phytoplankton growth, an increase in zooplankton standing stock and better growth of autotrophic flagellates compared with diatoms. Zooflagellates in the ecosystem influence the growth of zooplankton; secondary production by zooplankton was markedly depressed at low levels of zooflagellates. these results are believed to be of general significance for the diagnosis of suspended sediment effects on planktonic ecosystems.

关键词： AN ECOSYStEM MODEL ANALYSIS OF tHE EFFECt OF MINE tAILINGS ON tHE EUPHOtIC ZONE OF A PELAGIC ECOSYStEM

Fitness consequences of a clock pollinator filter in Nicotiana attenuata flowers in nature

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2017年第11期59卷 805-809页

作者： felipe yon danny kessler youngsung joo sang-gyu kim ian t.baldwin department of molecular ecology max planck institute for chemical ecologyHans-Knoll-StraBe 8D-07745 JenaGermany center for genome engineering institute for basic scienceYuseong-gu34047 DaejeonSouth Korea

Nicotiana attenuata flowers, diurnally open,emit scents and move vertically to interact with nocturnal hawkmoth and day-active hummingbird pollinators. to examine the fitness consequences of these floral rhythms, we conducted pollination trials in the plant’s native habitat with phase-shifted flowers of plants silenced in circadian clock genes. the results revealed that some pollination benefits observed under glasshouse conditions were not reproduced under natural field conditions. Floral arrhythmicity increased pollination success by hummingbirds, while reducing those by hawkmoths in the field. thus, floral circadian rhythms may influence a plant’s fitness by filtering pollinators leading to altered seed set from outcrossed pollen.

关键词： Fitness consequences a clock pollinator filter in Niicotiana attenuata flowers in nature

维普期刊数据库

the evolving ENSO observing system

在线全文

学校读者我要写书评

暂无评论

National Science Review 2018年第6期5卷 805-807页

作者： Dake Chen Neville Smith William kessler State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography

El Nio–Southern Oscillation (ENSO)is by far the most energetic and influential short-term climate variability on our planet, originating from an instability of the large-scale ocean-atmosphere interaction in the tr... 详细信息

关键词： the evolving ENSO observing system tAO

Fitness consequences of altering floral circadian oscillations for Nicotiana attenuata

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2017年第3期59卷 180-189页

作者： Felipe Yon Danny kessler Youngsung Joo Lucas Cortes Llorca Sang-Gyu Kim Ian t. Baldwin Department of Molecular Ecology Max Planck Institute for Chemical Ecology Hans-Knoll-Straβe 8 D-07745 Jena Germany Center for Genome Engineering Institute for Basic Science Yuseong-gu 34047 Daeieon South Korea

Ecological interactions between flowers and pollinators are all about timing. Flower opening/closing and scent emissions are largely synchronized with pollinator activity, and a circadian clock regulates these rhythms. However, whether the circadian clock increases a plant＇s reproductive success by regulating these floral rhythms remains untested. Flowers of Nicotiana attenuata, a wild tobacco, diurnally and rhythmically open, emit scent and move vertically through a 140° arc to interact with nocturnal hawkmoths. We tethered flowers to evaluate the importanceof flower positions for Manduca flower position dramatically sexta-mediated pollinations; nfluenced pollination. We examined the pollination success of phase-shifted flowers, silenced in circadian clock genes, NaZtL, NaLHY, and NatOCI, by RNAi. Circadian rhythms in N. attenuata flowers are responsible for altered seed set from outcrossed pollen.

关键词： Yonggen Lou Zhejiang University China

维普期刊数据库

CHLORAD: Eradicating translocon Components from the Outer Membrane of the Chloroplast

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2019年第4期12卷 467-469页

作者： Venkatasalam Shanmugabalaji Felix kessler Laboratory of Plant Physiology University of Neuchatel 2000 Neuchatel Switzerland

Around 100 proteins are produced inside the chloroplast but the vast majority must be imported. these proteins are synthesized in the cytosol as preproteins with cleavable targeting sequences. Several plastid types other than chloroplasts exist. During plant development, one plastid type may be converted to another, a process referred to as plastid transition (Jarvis and Lopez-Juez, 2013). During plastid transitions, proteome remodeling occurs, and one set of imported proteins is replaced by another that is functionally adapted (Kleffmann et al., 2007). Moreover, plastid proteomes are known to be regulated in an environmentdependent fashion, and chloroplasts may respond to changing light conditions by regulating the composition and abundance of photosynthetic complexes.

关键词： CHLORAD Eradicating translocon Components Outer Membrane Chloroplast

Evaluating the process of mental health and primary care integration:the Vermont Integration Profile

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Family Medicine and Community Health 2015年第1期3卷 63-65页

作者： Rodger kessler University of Vermont-Family Medicine 89 Beaumont Ave Given Courtyard 4th FloorBurlingtonVermont 05405USA

Objective:We developed and tested a measure to identify level of primary care behavioral health *** produced a thirty item,six domain electronically delivered measure,and a total ***:We generated a convenience sample of 137 survey responses,including 104 pri-mary care *** provided each practice a summary of their own data,and generated a data base of all *** calculated descriptive ***:the mean total score was 56/*** Vermont Integration Profile(VIP)discrimi-nated between types of practices in the direction *** test retest reliability was ***:the VIP demonstrated good feasibility and construct validity,initial reliability,low provider demand and good discrimination between types of practices.

关键词： Vermont Integration Profile integration implementation