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Biomedical and Environmental sciences 2024年第3期37卷 233-241页

作者： XIAO Tian Li YUAN shu Qian GAO Jing Yu Julien sbaker YANG Yi De WANG Xi Jie ZHENG Chan Juan DONG Yan Hui ZOU Zhi Yong Key Laboratory of Molecular Epidemiology of Hunan Province School of MedicineHunan Normal UniversityChangsha 410081HunanChina The Institute of Interdisciplinary studies Hunan Normal UniversityChangsha 410013HunanChina Chenzhou First People's Hospital Chenzhou 423000HunanChina Centre for Health and Exercise science Research Hong Kong Baptist UniversityKowloon TongHong Kong 999077China Department of sport Physical Education and HealthHong Kong Baptist UniversityKowloon TongHong Kong 999077China Vanke school of Public Health Tsinghua UniversityBeijing 100084China Institute of Child and Adolescent Health School of Public HealthPeking University Health Science CenterBeijing 100191China

Objective Hypertriglyceridemic waist(HW),hypertriglyceridemic waist-to-height ratio(HWHtR),and waist-to-hip ratio(WHR)have been shown to be indicators of cardiometabolic risk ***,it is not clear which indicator is more suitable for children and *** aimed to investigate the relationship between HW,HWHtR,WHR,and cardiovascular risk factors clustering to determine the best screening tools for cardiometabolic risk in children and *** This was a national cross-sectional *** and biochemical variables were assessed in approximately 70,000 participants aged 6–18 years from seven provinces in ***,physical activity,dietary intake,and family history of chronic diseases were obtained through ***,χ2 and logistic regression analysis was *** A significant sex difference was observed for HWHtR and WHR,but not for HW *** risk of cardiometabolic health risk factor clustering with HW phenotype or the HWHtR phenotype was significantly higher than that with the non-HW or non-HWHtR phenotypes among children and adolescents(HW:OR=12.22,95%CI:9.54-15.67;HWHtR:OR=9.70,95%CI:6.93-13.58).Compared with the HW and HWHtR phenotypes,the association between risk of cardiometabolic health risk factors(CHRF)clustering and high WHR was much weaker and not significant(WHR:OR=1.14,95%CI:0.97-1.34).Conclusion Compared with HWHtR and WHR,the HW phenotype is a more convenient indicator with higher applicability to screen children and adolescents for cardiovascular risk factors.

关键词： Hypertriglyceridemic waist Waist-to-hip ratio Children and adolescents China Hypertriglyceridemic waist-to-height ratio Cardiovascular risk factors

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深情密码

高中生（作文） 2015年第4期 26-26页

作者： Kathleene s.baker 小鱼

我看着信封上潦草的字迹,趁着泪水还没夺眶而出,我眨了眨眼又念了一遍。我的生日卡是爸爸写好并寄出的,上面还有他的签名。我根本没期盼那一年能收到卡片。之前的几个月眼见着妈妈健康状况急转直下,宛如噩梦。在爸爸这个年纪,这种折磨... 详细信息

我看着信封上潦草的字迹,趁着泪水还没夺眶而出,我眨了眨眼又念了一遍。我的生日卡是爸爸写好并寄出的,上面还有他的签名。我根本没期盼那一年能收到卡片。之前的几个月眼见着妈妈健康状况急转直下,宛如噩梦。在爸爸这个年纪,这种折磨对他来说也是一次很大的打击,尤其是当他得知妈妈只能在疗养院度过最后的日子。

关键词：密码健康状况疗养院

维普期刊数据库博看期刊

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学习分析四种范式:论范式融合的重要性

中国远程教育 2021年第12期 38-52,77页

作者： [美]赖安·s.贝克 [澳]德拉甘·伽瑟维克 [澳]沙姆亚·卡伦拜亚肖俊洪(译) 美国宾夕法尼亚大学美国宾夕法尼亚大学学习分析中心国际教育数据挖掘学会《基于计算机的情景学习》《教育数据挖掘期刊》澳大利亚莫纳什大学信息技术学部学习分析研究学会汕头开放大学

与初期相比,学习分析已经有了长足发展。这个领域从研究成果发表渠道看声誉提高得很快,已经形成一个富有活力的共同体,对政策和实践的影响越来越大。然而,很多研究者仍在厘清这个领域的范围以把学习分析的贡献与其他同样基于教育数据领... 详细信息

与初期相比,学习分析已经有了长足发展。这个领域从研究成果发表渠道看声誉提高得很快,已经形成一个富有活力的共同体,对政策和实践的影响越来越大。然而,很多研究者仍在厘清这个领域的范围以把学习分析的贡献与其他同样基于教育数据领域的贡献区分开来。我们认为,应该重视协作和了解相关领域的研究成果,才能保证学习分析领域健康发展,而不是强调它们的不同。具体讲,本文提出一个旨在分析当今聚焦教育数据研究的相关领域如何影响学习分析领域发展的框架。该框架的着眼点是这些领域各自所采用的主要方法范式,即本质论、实体论/还原论、本体论/辩证论和存在论。本文使用这个框架分析学习分析领域(本体论范式)如何在方法上受到教育数据挖掘(实体论范式)、量化民族志(存在论范式)和大规模学习(本质论范式)等领域新近发展的影响。本文根据分析结果归纳文献中存在的、有待今后填补的研究空白。

关键词：学习分析教育人工智能量化民族志大规模学习机器学习研究范式

search for the doubly charmed baryon ■

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science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 8-22页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala s.Aiola Z.Ajaltouni s.Akar P.Albicocco J.Albrecht F.Alessio M.Alexander A.Alfonso Albero G.Alkhazov P.Alvarez Cartelle A.A.Alves Jr s.Amato Y.Amhis L.An L.Anderlini G.Andreassi M.Andreotti F.Archilli J.Arnau Romeu A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier s.Bachmann J.J.Back s.baker V.Balagura W.Baldini A.Baranov R.J.Barlow s.Barsuk W.Barter M.Bartolini F.Baryshnikov G.Bassi V.Batozskaya B.Batsukh A.Battig V.Battista A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter L.J.Bel V.Belavin s.Belin N.Beliy V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-Haim s.Benson s.Beranek A.Berezhnoy *** D.Berninghoff H.C.Bernstein E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko s.Bhasin J.Bhom M.s.Bieker s.Bifani P.Billoir A.Birnkraut A.Bizzeti M.Bjφrn M.P.Blago T.Blake F.Blanc s.Blusk D.Bobulska V.Bocci O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar s.Borghi M.Borisyak M.Borsato J.T.Borsuk T.J.V.Bowcock C.Bozzi s.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu E.Buchanan A.Buonaura C.Burr A.Bursche J.s.Butter J.Buytaert W.Byczynski s.Cadeddu H.Cai R.Calabrese s.Cali R.Calladine M.Calvi M.Calvo Gomez A.Camboni P.Campana D.H.Campora Perez L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini P.Carniti K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero R.Cenci J.Cerasoli M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis M.Chefdeville V.Chekalina C.Chen s.Chen A.Chernov s.-G.Chitic V.Chobanova M.Chrzaszcz A.Chubykin P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek F.Cindolo 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 A.Comerma-Montells A.Contu N.Cooke G.Coombs s.Coquereau G.Corti C.M.Costa sobral B.Couturier D.C.Craik J.Crkovska A.Crocombe M.Cruz Torres R.Currie C.L.Da silva E.Dall'Occo J.Dalseno C.D'Ambrosio A.Danilina P.d'Argent A.Davis O.De Aguiar Francisco K.De Bruyn s.De Capua M 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 school of Physics state Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayOrsayFrance LPNHE Sorbonne Universite Paris Diderot Sorbonne Paris Cite CNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kernphysik(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-Bicocca MilanoItaly INFN sezione di Milano MilanoItaly INFN sezione di Cagliari MonserratoItaly INFN sezione di Padova PadovaItaly INFN sezione di Pisa PisaItaly INFN sezione di Roma Tor Vergata RomaItaly INFN sezione di Roma La sapienza RomaItaly Nikhef National Institute for subatomic Physics AmsterdamNetherlands Nikhef National Institute for subatomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of sciences KrakowPoland AGH-University of science and Technology Faculty of Physics and Applied Computer ScienceKrakowPoland Natio

A search for the doubly charmed baryon ■^+cc is performed through its decay to theΛ^+c K^-π^+ final state,using proton-proton collision data collected with the LHCb detector at centre-of-mass energies of 7,8 and 13 *** data correspond to a total integrated luminosity of 9 fb^-*** significant signal is observed in the mass range from 3.4 to 3.8 GeV/c^*** limits are set at 95%credibility level on the ratio of the ■^+cc production cross-section times the branching fraction to that ofΛ^+c and ■^++cc *** limits are determined as functions of the ■^+cc mass for different lifetime hypotheses,in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 4 to 15 GeV/c.

关键词： charmed baryons limits on production of particles charmed quarks experimental tests

人乳头瘤病毒衣壳蛋白C末端结构臂具有免疫原性并参与病毒—宿主细胞的相互作用

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科学新闻 2017年第4期 179-179页

作者： Zhihai Li Xiaodong Yan Hai Yu Daning Wang shuo song Yunbing Li Maozhou He Qiyang Hong Qingbing Zheng Qinjian Zhao Ying Gu Jun Zhang Mandy E.W.Janssen Giovanni Cardone Norman H.Olson Timothy s.baker 李少伟 Ningshao Xia 厦门大学生命科学学院

文章简介宫颈癌是全球女性第二大常见恶性肿瘤,人乳头瘤病毒(HPV)是导致女性宫颈癌发生的主要原因。HPV型别众多,主要的高危型型别种类多达15种,且型别间免疫血清交叉保护能力极低,目前国际上已上市的预防性多价HPV疫苗均不能为接种者... 详细信息

文章简介宫颈癌是全球女性第二大常见恶性肿瘤,人乳头瘤病毒(HPV)是导致女性宫颈癌发生的主要原因。HPV型别众多,主要的高危型型别种类多达15种,且型别间免疫血清交叉保护能力极低,目前国际上已上市的预防性多价HPV疫苗均不能为接种者提供完全保护。长期以来,高分辨率HPV的病毒结构信息的缺乏限制了对HPV病毒的组装模式和感染机制的深入理解,进

关键词： HPV 宿主细胞宫颈癌型别低温电镜

search for the rare decay B^(0)→J/ψФ

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Chinese Physics C 2021年第4期45卷 47-60页

作者： R.Aaij C.Abellin Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnial C.A.Aidala s.Aiola Z.Ajaltouni s.Akar J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelle 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.Bachmaver J.J.Back s.baker P.Baladron Rodriguez V.Balagura W.Baldinit 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.Bedeschis I.Bediaga A.Beiter V.Belavin s.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko s.Bhasin J.Bhom L.Bian M.s.Bieker s.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzeti M.Biorn 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 Rodriguezs M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Burschee 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 D.H.Campora Perez A.F.Campoverde Quezada s.Capelli L.Capriotti A.Carbonel G.Carboni R.Cardinale A.Cardini I.Carli P.Carniti 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 s.-G.Chitic 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 Centro Brasileiro de Pesquisas Fisicas(CBPF) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina school of Physics state Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of sciences BeijingChina Institute Of High Energy Physics(IHEP) BejingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq Paris-saclay CNRS/IN2P3IJCLabOrsayFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut fir Kernphysik(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 Frascatiltaly INFN sezione di Genova GenovaItaly INFN sezione di Milano Bicocca Milanolaly INFN sezione di Milano MilanoItaly INFN sezione di Cagliari Monserratoltaly Universita degli studi di Padova Universita e INFNPadovaPadovaItaly INFN sezione di Pisa PisaItaly INFN sezione di Roma Tor Vergata RomaItaly INFN sezione di Roma La sapienza RomaItaly Nikhef National Institute for subatomic Physics AmsterdamNetherlands Nikhef National Institute for subatomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of sciences KrakowPoland AGH-University of science and Technology Faculty of Physics and Applied Computer Science

A search for the rare decay B^(0)→J/ψФis performed using Pp collision data collected with the LHCb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresponding to an integrated luminosity of9 *** significant signal of the decay is observed and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B physics flavour physics rare decay ω-Фmixing branching fraction

Measurement of Ξcc++ production in pp collisions at s1/2=13 TeV

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Chinese Physics C 2020年第2期44卷 13-23页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala s.Aiola Z.Ajaltouni s.Akar P.Albicocco J.Albrecht F.Alessio M.Alexander A.Alfonso Albero G.Alkhazov P.Alvarez Cartelle A.A.Alves Jr s.Amato Y.Amhis L.An L.Anderlini G.Andreassi M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier s.Bachmann J.J.Back s.baker V.Balagura W.Baldini A.Baranov R.J.Barlow s.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi V.Batozskaya B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter L.J.Bel V.Belavin s.Belin V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-Haim s.Benson s.Beranek A.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko s.Bhasin J.Bhom M.s.Bieker s.Bifani P.Billoir A.Bizzeti M.Bjørn M.P.Blago T.Blake F.Blanc s.Blusk D.Bobulska V.Bocci O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar s.Borghi M.Borisyak M.Borsato J.T.Borsuk T.J.V.Bowcock C.Bozzi M.J.Bradley s.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu E.Buchanan A.Buonaura C.Burr A.Bursche A.Butkevich J.s.Butter J.Buytaert W.Byczynski s.Cadeddu H.Cai R.Calabrese L.Calero Diaz s.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana D.H.Campora Perez A.F.Campoverde Quezada L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carniti K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero s.Celani R.Cenci J.Cerasoli M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis M.Chefdeville V.Chekalina C.Chen s.Chen A.Chernov s.-G.Chitic V.Chobanova s.Cholak M.Chrzaszcz A.Chubykin P.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek F.Cindolo 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 A.Comerma-Montells A.Contu N.Cooke G.Coombs s.Coquereau G.Corti C.M.Costa sobral B.Couturier D.C.Craik J.Crkovska A.Crocombe M.Cruz Torres R.Currie C.L.Da silva E.Dall'Occo J.Dalseno C.D' Centro Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina school of Physics state Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universität 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-Bicocca MilanoItaly INFN sezione di Milano MilanoItaly INFN sezione di Cagliari MonserratoItaly INFN sezione di Padova PadovaItaly INFN sezione di Pisa PisaItaly INFN sezione di Roma Tor Vergata RomaItaly INFN sezione di Roma La sapienza RomaItaly Nikhef National Institute for subatomic Physics AmsterdamNetherlands Nikhef National Institute for subatomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of sciences KrakówPoland AGH-University of science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The production of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4sed in this measuremen... 详细信息

The production of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4sed in this measurement correspond to an integrated luminosity of 1.7fb^-1,recorded by the LHCb experiment during *** ratio of the ■ production cross-section times the branching fraction of the■→∧^+cK^-π^+ π^+decay relative to the prompt ∧^+c production cross-section is found to be(2.22±0.27±0.29)×10^-4,assuming the central value of the measured lifetime,where the first uncertainty is statistical and the second systematic.

关键词： doubly charmed baryons hadron production QCD

The role of phosphorus in the metabolism of arsenate by a freshwater green alga, Chlorella vulgaris

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Journal of Environmental sciences 2016年第11期28卷 169-178页

作者： Josh baker Dirk Wallschlager Trent University Environmental and Life Sciences Graduate Program 1600 West Bank Dr Peterborough ON K9L 0G2 Canada school of the Environment Department of Chemistry and Water Quality Centre Trent University 1600 West Bank Dr Peterborough ONK9L 0G2 Canada

A freshwater microalga, Chlorella vulgaris, was grown in the presence of varying phosphate concentrations（〈 10–500 μg/L P） and environmentally realistic concentrations of arsenate（As（Ⅴ））（5–50 μg/L As）. Arsenic speciation in the culture medium and total cellular arsenic were measured using AEC-ICP-Ms and ICP-DRC-Ms, respectively, to determine arsenic biotransformation and uptake in the various phosphorus scenarios. At high phosphate concentration in the culture medium, 〉 100 μg/L P, the uptake and biotransformation of As（Ⅴ） was minimal and dimethylarsonate（DMAs（Ⅴ）） was the dominant metabolite excreted by C. vulgaris, albeit at relatively low concentrations. At common environmental P concentrations, 0–50 μg/L P, the uptake and biotransformation of As（Ⅴ） increased. At these higher As-uptake levels, arsenite（As（Ⅲ）） was the predominant metabolite excreted from the cell. The concentrations of As（Ⅲ） in these low P conditions were much higher than the concentrations of methylated arsenicals observed at the various P concentrations studied. The switchover threshold between the（small） methylation and（large） reduction of As（Ⅴ） occurred around a cellular As concentration of 1 fg/cell. The observed nearly quantitative conversion of As（Ⅴ） to As（Ⅲ） under low phosphate conditions indicates the importance of As（Ⅴ） bio-reduction at common freshwater P concentrations. These findings on the influence of phosphorus on arsenic uptake, accumulation and excretion are discussed in relation to previously published research. The impact that the two scenarios of As（Ⅴ） metabolism, As（Ⅲ） excretion at high As（Ⅴ）-uptake and methylarsenical excretion at low As（Ⅴ）-uptake, have on freshwater arsenic speciation is discussed.

关键词： Arsenic speciation Phosphorus Freshwater algae Toxicity Biotransformation

Interstitial strengthening in *** and alloys

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Advanced Powder Materials

Advanced Powder Materials 2022年第4期1卷 1-7页

作者： Ian baker Thayer schoolofEngineering DartmouthCollegeHanoverNH03755USA

In this short review,we highlight instances where interstitials have been shown to substantially increase the yield strength and work-hardening rate(WHR)of ***,particularly high entropy alloys,medium entropy alloys,TWIP steels and stainless ***,the common practice of describing interstitial strengthening in *** using models that are used to explain substitutional strengthening appears to be neither appropriate nor *** we suggest,based on the literature,that the yield strength increase due to interstitials in *** is more appropriately described by a linear dependence on the concentration:due to a paucity of experimental studies,the dependence of the yield strength and WHR on misfit parameters is currently ***,the source of the strengthening remains unclear.A feature that has been observed in several *** is that interstitial additions lead to a change from wavy to planar slip although the origin of this change,which may be related to changes in stacking fault energy as well as other factors,remains *** paper concludes by outlining areas of future research,including the need to develop a new model for interstitial strengthening in ***.

关键词： Interstitials f.c.c.alloys High entropy alloys Yield strength Work-hardening rate