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Search for the doubly heavy baryons Ω^(0)_(bc) and E^(0)_(bc) decaying to Λ^(+)_(c)π^(-) and E^(+)_(c)π^(-)

Chinese Physics C 2021年第9期45卷 10-21页

作者： R.Aaij C.Abelian Beteta T.Ackernley B.Adeva M.Adinolfi H.Afshamia C.A.Aidala S.Aiola Z.Ajaltouni S.Aka j.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelie S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer j.j.Back P.Baladron Rodriguez V.Balagura W.Baldini j.Baptista Leite R.j.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov j.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Beminghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin j.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.Bjorn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato j.T.Borsuk S.A.Bouchiba T.j.V.Bowcock A.Boyer C.Bozzi M j.Bradley S.Braun A.Brea Rodriguez M.Brodski j.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Bursche A.Butkevich j.S.Butter j.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Camiti L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani j.Cerasoli A.j.Chadwick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff j.Closier j.L.Cobbledick V.Coco j.A.B.Coelho j.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik j.Crkovska M.Cruz Torres R.Currie C.L.Da Silva E.Dall'Occo j.Dalseno C.D'Ambrosi Centro Brasileiro de Pesquisas Fisicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de janeiro(UFRj) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute of High Energy Physics(IHEP) BeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University ofChinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universite Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/FN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kemphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universita degli Studi di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKr

The first search for the doubly heavyΩ^(0)_(bc)baryon and a search for the E^(0)_(bc)baryon are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresponding to an integrated luminosity of 5.2 fb^(-1).The baryons are reconstructed via their decays to Λ^(+)_(c)π^(-)and E^(+)_(c)π^(-).No significant excess is fbund for invariant masses between 6700 and 7300 MeV/c^(2),in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/*** limits are set on the ratio of the Ω^(0)_(bc)and E^(0)_(bc)production cross-section times the branching fraction to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))relative to that of the Λ^(0)_(b)(E^(0)_(b))baryon,for different lifetime hypotheses,at 95%confidence *** upper limits range from 0.5 x 10^(-4)to 2.5 x 10^(-4)for theΩ^(0)_(bc)→Λ^(+)_(c)π^(-)(E^(0)_(bc)→Λ^(+)_(c)π^(-))decay,and from 1.4x 10^(-3)to 6.9 x 10^(-3)for theΩ^(0)_(bc)→E^(+)_(c)π^(-)(E^(0)_(bc)→E^(+)_(c)π^(-))decay,depending on the considered mass and lifetime of theΩ^(0)_(bc)(E^(0)_(bc))baryon.

关键词： B physics quarkonium spectroscopy heavy quark production

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Researching the Research: Applying Machine Learning Techniques to Dissertation Classification

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journal of Computer Science Research 2020年第4期2卷 7-15页

作者： Suzanna Schmeelk Tonya L.Fields Lisa R.Ellrodt Ion C.Freeman Ashley j.Haigler St.john's University United States Pace University United States

This research examines industry-based dissertation research in a doctoralcomputing program through the lens of machine learning algorithms todetermine if natural language processing-based categorization on abstractsalone is adequate for classification. This research categorizes dissertationby both their abstracts and by their full-text using the GraphLabCreate library from Apple’s Turi to identify if abstract analysis is anadequate measure of content categorization, which we found was not. Wealso compare the dissertation categorizations using IBM’s watson Discoverydeep machine learning tool. Our research provides perspectiveson the practicality of the manual classification of technical documents;and, it provides insights into the: (1) categories of academic work createdby experienced fulltime working professionals in a Computing doctoralprogram, (2) viability and performance of automated categorization of theabstract analysis against the fulltext dissertation analysis, and (3) natuallanguage processing versus human manual text classification abstraction.

关键词： Machine learning Natural language processing(NLP) Abstract vs fulltext dissertation analysis Industry-based Dissertation research classification GraphLab Create library IBM watson Discovery

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对“全球捕捞船队的燃料问题”（Tyedmers、watson和Pauly，Ambio34（8）629～632）一文的评论

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AMBIO－人类环境杂志 2006年第1期35卷 29-29页

作者： Sidney j．Holt 寒江（译） Voc. Palazzetta 68 Paciano (PG) 06060 Italia

Tyedmers、watson和Pauly成功地将人们的注意力吸引到海洋渔业石油消费巨大的规模、全球分布方面。这种高质量的、富含蛋白质的食品资源被持续不断地大量“攫取”，而不是以可持续的态度加以利用，这是可耻的，而且对这位海洋生物学家... 详细信息

Tyedmers、watson和Pauly成功地将人们的注意力吸引到海洋渔业石油消费巨大的规模、全球分布方面。这种高质量的、富含蛋白质的食品资源被持续不断地大量“攫取”，而不是以可持续的态度加以利用，这是可耻的，而且对这位海洋生物学家来说是令人失望的。用动力越来越强、耗补贴越来越多的渔船去追逐越来越少的鱼，这与历史上用越来越多的能源从越来越贫乏的矿脉中获取金属的行为是相似的。这里，我将就作者的发现做两点评论：首先，“全球渔业燃料烧掉的能量比实际捕捞到的可食用蛋白质能量大12．5倍”。（我不明白作者为什么选蛋白质能量而不选也来自大量脂肪和鱼油的总能量来做比较。）当前生态学文献中一种常见的错误是将饮食中的卡路里含量等同于所消耗食物的营养价值。尽管食物的确是代谢能源的来源，但饮食同时也为肌肉、骨头及其它组织结构提供了不可缺少的化学元素和构成物质。从这方面说，用卡路里来做比较是没用的，还会引起误导。

关键词：全球分布捕捞船队燃料评论海洋生物学家海洋渔业蛋白质能量比石油消费食品资源

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SYNTHESIS AND BIOACTIVITY OF SIX-RING NUCLEOSIDE MODIFIED siRNA

SYNTHESIS AND BIOACTIVITY OF SIX-RING NUCLEOSIDE MODIFIED si...

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第17届国际磷化学大会

作者： Nan Zhang 1 2 Yue Wang1 2 Pu-Qin Cai 2 3 Pei-Zhuo Zhang4 Yu-Yang jiang1 2* Yufen Zhao1 5 1Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of Chemistry Tsinghua University Beijing 10084 P. R. China 2Key Laboratory for Chemical Biology of Guangdong Province Shenzhen Graduate School of Tsinghua University Shenzhen 518055 P. R. China 3College of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 P. R. China 4 Shanghai GenePharma Co. Ltd. Suite 602 1011 Halei Road Z.-j. High Tech Park Shanghai 201203 P.R. China 5Key Laboratory for Chemical Biology of Fujian Province Department of Chemistry Xiamen University Xiamen 361005 P. R. China

＜正＞Small interfering RNA （siRNA） molecules have drawn much attention since it can mediate target gene expression in a variety of mammalian cells1. SiRNA works by watson-Crick base-pairing of

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