检索结果-南通市图书馆

On self-affine tiles that are homeomorphic to a ball

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2024年第1期67卷 45-76页

作者： jorg.M.Thuswaldner Shu-Qin Zhang Mathematics and Statistics University of LeobenLeoben 8700Austria School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China

Let M be a 3×3 integer matrix which is expanding in the sense that each of its eigenvalues is greater than 1 in modulus and let D?Z^(3)be a digit set containing|det M|*** the unique nonempty compact set T=T(M,D)defined by the set equation MT=T+D is called an integral self-affine tile if its interior is *** D is of the form D={0,v,...,(|det M|-1)v},we say that T has a collinear digit *** present paper is devoted to the topology of integral self-affine tiles with collinear digit *** particular,we prove that a large class of these tiles is homeomorphic to a closed 3-dimensional ***,we show that in this case,T carries a natural CW complex structure that is defined in terms of the intersections of T with its neighbors in the lattice tiling{T+z:z∈Z^(3)}induced by *** CW complex structure is isomorphic to the CW complex defined by the truncated octahedron.

关键词： self-afine sets tiles and tilings low-dimensional topology truncated octahedron

Expanded Porphyrin Exhibiting Off-Centered Out-of-Plane Coordination to Dysprosium

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1731-1738页

作者： Dmitry I.Nazarov jorg. labella Alexey V.Kuzmin Maxim A.Faraonov Evgenii N.Ivanov Salavat S.Khasanov Tomas Torres Mikhail K.Islyaikin Dmitri V.Konarev Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS 142432 Chernogolovka Department of Organic Chemistry Universidad Autonoma de Madrid28049 Madrid Institute of Solid-State Physics RAS 142432 Chernogolovka Research Institute of Macroheterocycles Ivanovo State University of Chemistry and Technology15300 Ivanovo G.A.Krestov Institute of Solution Chemistry of the Russian Academy of Sciences 153045 Ivanovo Institute for Advanced Research in Chemical Sciences Universidad Autonoma de Madrid28049 Madrid IMDEA-Nanociencia 28049 Madrid

The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular *** this context,the use of expanded porphyrinoids remains elusive since their coordination chemistry is challenging to ***,taking inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine ***,we observed the selective formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductive *** this reaction,the oxidation state of the macrocycle did not *** X-ray diffraction analysis,we found that the coordination number of Dy in this complex was *** macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giving rise to a wellordered solid-state packing,governed byπ-π*** a result of this organization,a small magnetic coupling between the neighboring molecules was *** in all,this work provides key insights into the coordination of magnetically active metals with expanded porphyrinoids,thus motivating the development of advanced spintronic devices.

关键词： porphyrins dysprosium macrocycle coordination chemistry magnetism

鄂尔多斯盆地西缘李105井奥陶系乌拉力克组笔石生物地层研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地球学报 2024年

作者：王传尚胡勇 jorg.Maletz 危凯古生物与地质环境演化湖北省重点实验室中国地质调查局武汉地质调查中心长江大学资源与环境学院柏林自由大学地质研究所

本文通过对鄂尔多斯盆地西缘李105井奥陶系乌拉力克组的笔石化石的研究,划分出两个笔石生物带,即Nemagraptus gracilis带和Cilmacograptus bicornis带,其时限为桑比期。根据乌拉力克组的沉积学特征,结合最新的岩相古地理研究进展,认为... 详细信息

本文通过对鄂尔多斯盆地西缘李105井奥陶系乌拉力克组的笔石化石的研究,划分出两个笔石生物带,即Nemagraptus gracilis带和Cilmacograptus bicornis带,其时限为桑比期。根据乌拉力克组的沉积学特征,结合最新的岩相古地理研究进展,认为原乌拉力克组的底界以一套特征的砾屑灰岩为标志欠妥,建议将克里摩里组上段的以黑色含笔石页岩为主的地层划归乌拉力克组,新厘定的乌拉力克组在盆地西缘北部露头区内蒙古乌海桌子山一带至少包含了Pterograptus elegans、Didymograptus murchisoni和Nemagraptus gracilis带等三个笔石带,其时限跨越中奥陶世达瑞威尔期晚期到晚奥陶世桑比期早期。可见,乌拉力克组在鄂尔多斯盆地西缘,其顶、底界线均存在明显的穿时。这一发现不仅为乌拉力克组的时限及其相变穿时提供了准确的生物地层约束,也为这一地区岩相古地理的重建及页岩气勘探有利相带的优选提供了依据。

关键词：鄂尔多斯盆地西缘乌拉力克组笔石带穿时李105井

Disease networks. Uncovering disease-disease relationships through the incomplete interactome

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

四川生理科学杂志 2024年第4期46卷 199-199页

作者： jorg.Menche Center for Complex Networks Research and Department of Physics Northeastern University 110 Forsyth Street 111 Dana Research Center Boston MA 02115 USA. Center for Cancer Systems Biology (CCSB) and Department of Cancer Biology Dana-Farber Cancer Institute 450 Brookline Avenue Boston MA 02215 USA. Center for Network Science Central European University Nador u. 9 1051 Budapest Hungary. Center for Complex Networks Research and Department of Physics Northeastern University 110 Forsyth Street 111 Dana Research Center Boston MA 02115 USA. Center for Cancer Systems Biology (CCSB) and Department of Cancer Biology Dana-Farber Cancer Institute 450 Brookline Avenue Boston MA 02215 USA. Center for Cancer Systems Biology (CCSB) and Department of Cancer Biology Dana-Farber Cancer Institute 450 Brookline Avenue Boston MA 02215 USA. Department of Genetics Harvard Medical School 77 Avenue Louis Pasteur Boston MA 02115 USA. Department of Medicine Brigham and Women's Hospital Harvard Medical School 75 Francis Street Boston MA 02115 USA. Center for Complex Networks Research and Department of Physics Northeastern University 110 Forsyth Street 111 Dana Research Center Boston MA 02115 USA. Center for Cancer Systems Biology (CCSB) and Department of Cancer Biology Dana-Farber Cancer Institute 450 Brookline Avenue Boston MA 02215 USA. Center for Network Science Central European University Nador u. 9 1051 Budapest Hungary. Department of Medicine Brigham and Women's Hospital Harvard Medical School 75 Francis Street Boston MA 02115 USA. alb@neu.edu.

According to the disease module hypothesis,the cellular components associated with a disease segregate in the same neighborhood of the human interactome,the map of biologically relevant molecular ***,given the incompleteness of the interactome and the limited knowledge of disease-associated genes,it is not obvious if the available data have sufficient coverage to map out modules associated with each disease.

关键词： incomplete interactions. networks.

A formal model for ledger management systems based on contracts and temporal logic

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Blockchain(Research and Applications) 2022年第1期3卷 65-79页

作者： Paolo Bottoni Anna labella Remo Pareschi Department of Computer Science Sapienza University of Rome00185RomaItaly Stake Lab University of Molise86100CampobassoItaly

A key component of blockchain technology is the ledger,viz.,a database that,unlike standard databases,keeps in memory the complete history of past transactions as in a notarial archive for the benefit of any future *** second-generation blockchains such as Ethereum,the ledger is coupled with smart contracts,which enable the automation of transactions associated with agreements between the parties of a financial or commercial *** coupling of smart contracts and ledgers provides the technological background for very innovative application areas,such as Decentralized Autonomous Organizations(DAOs),Initial Coin Offerings(ICOs),and Decentralized Finance(DeFi),which propelled blockchains beyond cryptocurrencies that were the only focus of first generation blockchains,such as ***,the currently used implementation of smart contracts as arbitrary programming constructs has made them susceptible to dangerous bugs that can be exploited maliciously and has moved their semantics away from that of legal *** propose here to recompose the split and recover the reliability of databases by formalizing a notion of contract modeled as a finite-state automaton with well-defined computational characteristics derived from encoding in terms of allocations of resources to actors,as an alternative to the approach based on *** complete the work,we use temporal logic as the basis for an abstract query language that is effectively suited to the historical nature of the information kept in the ledger.

关键词： Ledger Contract Database Transaction Automata theory Temporal logic

Common interacting genetic variation shapes susceptibility to type 1 diabetes in a Colombian Caribbean community:In search of shared genetic markers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第4期11卷 106-108页

作者： Gloria Garavito-De Egea Alex Dominguez-Vargas jorg.e l.Velez Gustavo Aroca Luis Fagng Elkin Navarro-Quiroz Zilac Espitaleta Kenny Del Toro-Camargo Leticia Martinez-Ariza Tatiana Gonzalez-Vargas Susana Garcia Mauricio Arcos-Burgos Eduardo Egea Universidad del Norte Division Ciencias de la SaludBarranquillaColombia Universidad Simon Bolivar Facultad de Ciencias de la SaludBarranquillaColombia Clinica de la Costa Grupo de Investigacion en NefrologiaBarranquillaColombia Universidad de Antioquia Grupo de Investigacion en Psiquiatria(GIPSI)Departamento de PsiquiatriaInstituto de Investigaciones MedicasFacultad de MedicinaMedellinColombia

Genome-wide association studies(GWASs)have identified hundreds of loci across the human genome conferring susceptibility to autoimmune diseases(AIDs),some of which are shared between more than two ***,this univariate ... 详细信息

关键词： susceptibility diseases diabetes

Bringing epigenetics into the diagnostics of the andrology laboratory： challenges and perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2014年第5期16卷 669-674,I0006页

作者： Ruth Klaver jorg.Gromoll Centre of Reproductive Medicine and Andrology University Clinics of MOnster MOnster Germany

Recent studies have shown significant associations of aberrant DNA methylation in spermatozoa with idiopathic male infertility, increased frequency of spontaneous abortions and imprinting disorders. Thus, the analysis of DNA methylation of specific genes in spermatozoa has the potential to become a new valuable diagnostic marker in clinical andrology. This perspective article discusses the current state and value of DNA methylation analysis in the diagnostic setup of infertile men and outlines challenges and perspectives. It highlights the potential of DNA methylation in andrological diagnostics and its putative benefit in the examination of hitherto idiopathic infertile patients is described.

关键词： DNA methylation male infertility spermatogenesis

Transfer of CrylAc and Cry2Ab proteins from genetically engineered Bt cotton to herbivores and predators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2018年第5期25卷 823-832页

作者： Michael Meissle jorg.Romeis Agroscope Research Division Agroecology and Environment Zurich Switzerland

With the cukivation of Bt cotton, the produced insecticidal Cry proteins are ingested by herbivores and potentially transferred along the food chain to natural enemies, such as predators. In laboratory experiments with Bollgard II cotton, concentrations of CrylAc and Cry2Ab were measured in Lepidoptera larvae （Spodoptera littoralis, Hello- this virescens）, plant bugs （Euschistus heros）, aphids （Aphis gossypii）, whiteflies （Bemisia tabaci）, thrips （ Thrips tabaci, Frankliniella occidentalis）, and spider mites （Tetranychus urticae）. Tritrophic experiments were conducted with caterpillars ofS. littoralis as prey and larvae of ladybird beetles （Harmonia axyridis, Adalia bipunctata） and lacewings （Chrysop- erla carnea） as predators. Immunological measurements （ELISA） indicated that herbivores feeding on Bt cotton contained 5%-50% of the Bt protein concentrations in leaves except whiteflies and aphids, which contained no or only traces of Bt protein, and spider mites, which contained 7 times more Cry 1Ac than leaves. Similarly, predators contained 1%-30% of the Cry protein concentration in prey. For the nontarget risk assessment, this indicates that Bt protein concentrations decrease considerably from one trophic level to the next in the food web, except for spider mites that contain Bt protein concentrations higher than those measured in the leaves. Exposure of phloem sucking hemipterans is negligible.

关键词： arthropod food web Bacillus thuringiensis Bt cotton Cry protein ELISA transgenic plants

Fundamental influences of particles on stirred and unstirred venting processes of foaming systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2014年第2期8卷 141-148页

作者： Henrik LEIMEISTER jorg.STEINBACH Department of Process Engineering Technische Universitat Berlin Strage des 17. Juni 135 10623 Berlin Germany

Venting is the common safety measure to protect plant equipment against excessive overpressure. So far, scenarios in which particles were part of the system and should have been accounted for did ignore their presence; the scenarios were treated like a two-phase system. Current research shows that particles can have a major influence on the venting behaviour. Experimental results indicate that particles affect level swell and relief flow especially of foamy systems. Based on those results four different layers of influence of the particle have been identified and are presented in a first model. Based on this model recommendations for the development of new and more complex models are given.

关键词： venting multi-phase