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On the Order of Magnitude of the Divisor Function

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Acta Mathematica Sinica,English Series 2006年第2期22卷 377-382页

作者： Michel weber Mathmatique Universit Louis-Pasteur et G.N.R.S.7 rue Rene Descartes. 67084-Strasbourg Cedex France

Let D be an increasing sequence of positive integers, and consider the divisor functions：d（n, D） =∑d｜n,d∈D,d≤√n1, d2（n,D）=∑[d,δ]｜n,d,δ∈D,[d,δ]≤√n1,where [d,δ]=1.c.m.（d,δ）. A probabilistic argumen... 详细信息

关键词： Divisor function Prime divisors Bernoulli random walk

Interaction of hepatitis C virus with the type I interferon system

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World Journal of Gastroenterology 2007年第36期13卷 4818-4823页

作者： Friedemann weber Abteilung Virologie Institut für Medi- zinische Mikrobiologie und Hygiene Universitt Freiburg Freiburg D-79008 Germany

Hepatitis C virus （HCV） needs to tightly manipulate host defences in order to establish infection. The innate immune response slows down viral replication by activating cytokines such as the type Ⅰ interferons （IFN-α/ β）, which trigger the synthesis of antiviral proteins and modulate the adaptive immune system. HCV has therefore developed a number of countermeasures to stay ahead of the IFN system. Here, I will attempt to summarize the current state of research regarding IFN responses against HCV and the viral escape strategies. Particular emphasis will be put on the newly discovered mechanisms HCV employs to avoid the induction of IFN in infected cells.

关键词： Hepatitis C virus Innate immunity Interferon system Escape mechanisms

What controls the critical temperature of high temperature copper oxide superconductors:insights from scanneling tunnelling microscopy

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Science Bulletin 2017年第2期62卷 102-104页

作者： Cedric weber King's College London Theory and Simulation of Condensed Matter The Strand London WC2R 2LS UK

Since their discovery,the electronic structure of the high temperature superconductors has been a subject of intensive theoretical attention as well as controversy,a situation that continues even today.

关键词：高温超导体铜氧化物超导体隧道显微镜临界温度控制电子结构

Machine-learning assisted design principle search for singlet fission:an example study of cibalackrot

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npj Computational Materials 2022年第1期8卷 1703-1716页

作者： Fabian weber Hirotoshi Mori Department of Applied Chemistry Chuo University112-8551 Tokyo-toBunkyo-kuKasuga1-13-27Japan Department of Theoretical and Computational Molecular Science Institute for Molecular ScienceOkazaki444-8585Japan

This work uses quantum chemistry calculations and machine learning to explore design rules for singlet fission in a chemical space of four million indigoid *** identify~400,000 derivatives of 2,2′-diethenyl cibalackrot,which theoretically fulfil the energy conditions for exoergic singlet fission above the silicon band gap *** this database with a random forest classifier,we observe that small substituents with positive mesomeric effects and weak negative inductive effects reinforce the desired energetic conditions when placed at specific ***,a subset of molecules that reflects the random forest classifier’s rules are investigated for their quantum chemical properties to translate the desirable structural motifs into wavefunction-based design ***,direct correlations between the energetic condition for singlet fission,the biradical character and the charge and triplet spin density in prominent molecular regions are identified,providing insights that may serve as a guide for singlet fission core structure development.

关键词： singlet quantum classifier

Exploring Content Popularity in Information-Centric Networks

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China Communications 2015年第7期12卷 13-22页

作者： Andriana Ioannou Stefan weber School of Computer Science and Statistics Trinity College

Information-Centric Networking(ICN), an alternative architecture to the current Internet infrastructure, focuses on the distribution and retrieval of content by employing caches in a network to reduce network traffic. The employment of caches may be accomplished using graph-based and content-based criteria such as the position of a node in a network and content popularity. The contribution of this paper lies on the characterization of content popularity for on-path in-network caching. To this end, four dynamic approaches for identifying content popularity are evaluated via simulations. Content popularity may be determined per chunk or per object, calculated by the number of requests for a content against the sum of requests or the maximum number of requests. Based on the results, chunk-based approaches provide 23% more accurate content popularity calculations than object-based approaches. In addition, approaches that are based on the comparison of a content against the maximum number of requests have been shown to be more accurate than the alternatives.

关键词： network distributed architectures future internet information-centric networks caching technologies on-path caching content popularity

Correction to:Preface:Special Issue on Modeling,Simulation,and Optimization in Operational Research

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Journal of the Operations Research Society of China 2024年第2期12卷 548-548页

作者： Gerhard-Wilhelm weber J.Joshua Thomas Jose Antonio Marmolejo Saucedo Ugo Fiore Igor Litvinchev Pandian Vasant Poznan University of Technology PoznanPoland Institute of Applied Mathematics Middle East Technical UniversityAnkaraTurkey UOW Malaysia KDU Penang University CollegePetaling JayaMalaysia Facultad de Ingenieria Universidad PanamericanaMexico CityMexico Parthenope University and at Federico II University NaplesItaly Nuevo Leon State University San Nicolas de los GarzaMexico MERLIN Research Centre Ton Duc Thang UniversityHo Chi Minh CityVietnam

Synthesis of iron（ll） complexes with asymmetric N2O2 coordinating Schiff base-like ligands and their spin crossover properties

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Frontiers of Chemical Science and Engineering 2018年第3期12卷 400-408页

作者： Wolfgang Bauer Tanja Ossiander Birgit weber Department of Chemistry University of Bayreuth 95440 Bayreuth Germany

The synthesis of new Schiff base-like ligands with asymmetric substituents pattern and their iron complexes with pyridine as axial ligand is described. Two of the ligands and one of the iron（II） complexes were characterized by single crystal X-ray structure analysis. One of the the iron（II） complexes shows spin crossover behavior while the others remain in the high spin state. The influence of the reduced symmetry of the ligand on the properties of the complexes is discussed.

关键词： iron Schiffbase-like ligands magnetism spin crossover X-ray structures

Finite Element Simulations of Crack Propagation in Al_(2)O_(3)/6061Al Composites

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Acta Metallurgica Sinica(English Letters) 2014年第5期27卷 853-861页

作者： Galina Lasko Ulrich weber Siegfried Schmauder Institut für Materialprüfung Werkstoffkunde und Festigkeitslehre(IMWF)Universitat Stuttgart

In this work, the local fracture initiation behaviour of an Al2O3/6061Al composite is studied numerically. The damage behaviour of the microstructure is evaluated in consideration of the path and the amount of damage as well as the stress-strain performance of the microstructure. The damage behaviour of the ductile matrix has been simulated using the damage parameter D. For the simulation of fracture of the ceramic particles, a normal stress criterion is applied. For the analysis of the damage behaviour of the transition zone between particulate and matrix, both damage models （D parameter and normal stress criteria） are applied in this region. Parameter studies of crack propagation prediction in the Al2O3/6061Al composite on the basis of an Element Elimination technique have been performed for two differently heat-treated variants resulting in different mechanical properties. In addition, residual stress effects on the damage behaviour are examined for various microstructural situations.

关键词： Metal matrix composites Simulation Crack propagation Finite element method Element elimination technique

Coexisting brittle-ductile fracturing mechanisms in fault zones of the upper crust level

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Chinese Science Bulletin 1999年第22期44卷 2107-2112页

作者： K.weber IGDL University of Gottingen Gottingen 37077 Germany

Microstructural and sub-microstructural studies are conducted on calcite marble taken from the Autseib fault zone, Damara region, Namibia, SW Africa. The characteristic mi-crostructural styles of rocks deformed in the upper crust are analyzed, including mainly the two microstructural contrasts in the tectonites: ( i ) coarse grains (centimeter scale) in primary rocks and in deformed clasts and extremely fine grains (micron scale) in the matrix; and ( ii )

关键词： calcite rocks brittle-ductile transition fluids ductile fracturing Namibia.