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凡纳滨对虾盐碱水养殖池塘沉积物-水界面氮元素交换通量的研究

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水生生物学报 2024年第7期48卷 1183-1192页

作者：杜彦秋吴文广张子军吴桃冯旭张继红上海海洋大学水产与生命学院上海201306 中国水产科学研究院黄海水产研究所青岛海洋科学与技术试点国家实验室海洋渔业科学与食物产出过程功能实验室青岛266071 鄂尔多斯市农牧技术推广中心鄂尔多斯017000

为探究凡纳滨对虾(Litopenaeus vannamei)盐碱水养殖池塘沉积物-水界面中氮元素的转化规律,于2019年5—7月测定了山东省滨州市3个不同盐度(28、45和55)的池塘上覆水和沉积物间隙水中各种形态氮的含量。利用Fick第一定律估算了池塘沉积物... 详细信息

为探究凡纳滨对虾(Litopenaeus vannamei)盐碱水养殖池塘沉积物-水界面中氮元素的转化规律,于2019年5—7月测定了山东省滨州市3个不同盐度(28、45和55)的池塘上覆水和沉积物间隙水中各种形态氮的含量。利用Fick第一定律估算了池塘沉积物-水界面氮元素交换通量,分析了环境因素与交换通量的相关性。结果表明:(1)总体来讲,dIN、dON、TN由沉积物向水体扩散,即沉积物为dIN、dON和TN的源;NO_(3)^(-)-由水体向沉积物扩散,沉积物为NO_(3)^(-)的汇。在养殖期间,盐度28、45和55组,dIN总交换通量分别为1.69、23.07和19.36 mg/m^(2),dON总交换通量分别为36.60、27.90和19.98 mg/m^(2),TN总交换通量分别为38.09、43.66和32.56 mg/m^(2)。(2)从季节变化来看,dIN、dON、TN在养殖初期(5月)的交换通量显著高于养殖末期(7月);从盐度组来看,在5月,盐度28、45和55组,dIN平均交换通量分别为2.08、6.37和12.47 mg/(m^(2)·d),7月分别为-0.48、0.06和1.47 mg/(m^(2)·d),盐度55组显著大于其他两组(pdON交换通量5月分别为13.91、5.32和6.79 mg/(m^(2)·d),盐度28组显著大于其他两组(p2、10.94和5 mg/(m^(2)·d),盐度45组显著大于其他两组(p15.9、8.79和19.16 mg/(m^(2)·d),盐度45组显著小于其他两组(p1、9.1和3.28 mg/(m^(2)·d),盐度45组显著大于盐度55组(p2)^(-)-N、NO_(3)^(-)-N、NH_(4)^(+)-N交换通量显著正相关;有机质与NH_(4)^(+)、TN通量显著正相关;温度与NH_(4)^(+)交换通量显著负相关;含水率、孔隙度与NO_(3)^(-)-N、dON交换通量显著正相关。综上所述,沉积物是氮的潜在污染源,此污染潜力在养殖末期显著小于养殖初期;高盐度组有利于释放dIN,中低盐度组有利于释放dON。研究结果将有助于认识盐碱水养殖池塘的氮交换通量,为该种养殖模式的科学管理提供数据支撑。

关键词：盐碱水池塘沉积物-水界面氮凡纳滨对虾

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Solution-phase synthesis of ordered mesoporous carbon as resonant-gravimetric sensing material for room-temperature H2S detection

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chinese Chemical Letters 2020年第6期31卷 1680-1685页

作者： Jiawei Ni tao zhao Lei Tang pengpeng qiu Wan Jiang Lianjun wang pengcheng Xu Wei Luo State Key Laboratory for Modification of Chemical Fibers and polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China College of Life and Environmental sciences Shanghai Normal UniversityShanghai 200234China University of chinese academy of sciences Beijing 100049China

H2S can cause multiple diseases and poses a great threat to human ***,the precise detection of extremely toxic H2S at room temperature is still a great ***,a facile solvent evaporation induced aggregating assembly(EIAA)method has been applied for the production of ordered mesoporous carbon(OMCs)in an acidic THF/H2 O solution with high-molecular-weight poly(ethylene oxide)-b-polystyrene(pEO-b-pS)copolymers as the structure-directing agent,formaldehyde and resorcinol as carbon *** with the continuous evaporation of THF from the mixed solution,cylindrical micelles are formed in the solution and further assemble into highly ordered *** obtained OMCs possesses a two-dimensional(2 d)hexagonal mesostructure with uniform and large pore diameter(~19.2 nm),high surface area(599 m2/g),and large pore volume(0.92 cm3/g).When being used as the resonant cantilever gas sensor for room-temperature H2S detection,the OMCs has delivered not only a superior gas sensing performance with ultrafast re s ponse(14 s)and recovery(21 s)even at low concentration(2 ppm)but also an excellent selectivity toward H2S among various common interfering ***,the limit of detection is better than 0.2 ppm,indicating its potential application in environmental monitoring and health protection.

关键词： Mesoporous materials Carbon Self-assembly Resonant cantilever gas sensor H2S

Field-effect at electrical contacts to two-dimensional materials

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Nano Research 2021年第12期14卷 4894-4900页

作者： yao guo yan Sun Alvin Tang Ching-Hua wang yanqing zhao Mengmeng Bai Shuting Xu zheqi Xu tao Tang Sheng wang Chenguang qiu Kang Xu Xubiao peng Junfeng Han Eric pop yang Chai School of physics Beijing Institute of TechnologyBeijing100081China department of Electrical Engineering and Stanford SystemX Alliance Stanford UniversityStanfordCA94305USA Advanced Manufacturing EdA Co. Ltd.Shanghai201204China Key Laboratory for the physics and Chemistry of Nanodevices Department of ElectronicsPeking UniversityBeijing100871China department of Applied physics The Hong Kong Polytechnic UniversityHong KongChina

The inferior electrical contact to two-dimensional(2d)materials is a critical challenge for their application in post-silicon very large-scale integrated *** contacts were generally related to their resistive effect,quantified as contact *** a systematic investigation,this work demonstrates a capacitive metal-insulator-semiconductor(MIS)field-effect at the electrical contacts to 2d materials:The field-effect depletes or accumulates charge carriers,redistributes the voltage potential,and gives rise to abnormal current saturation and *** one hand,the current saturation hinders the devices’driving ability,which can be eliminated with carefully engineered contact *** the other hand,by introducing the nonlinearity to monolithic analog artificial neural network circuits,the circuits’perception ability can be significantly enhanced,as evidenced using a coronavirus disease 2019(COVId-19)critical illness prediction *** work provides a comprehension of the field-effect at the electrical contacts to 2d materials,which is fundamental to the design,simulation,and fabrication of electronics based on 2d materials.

关键词： field-effect electrical contact two-dimensional materials nonlinearity in-memory-computing

基于分光谱利用的新型塔式热-光伏复合发电系统的发电量预测

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太阳能学报 2024年第9期45卷 428-434页

作者：仇中柱倪行睿朱群志叶勇健张涛蔡靖雍上海电力大学能源与机械工程学院上海200090 中国电力工程顾问集团华东电力设计院有限公司上海200333

提出一种利用分光谱技术的塔式热-光伏复合发电系统,介绍系统的组成和结构。采用MUUEN算法设计镜场排列,在AM1.5d太阳光谱作为入射光时对提出的系统进行光学和热力学分析。采用拉萨典型气象年的太阳辐射数据,预测常规光伏发电、常规光... 详细信息

提出一种利用分光谱技术的塔式热-光伏复合发电系统,介绍系统的组成和结构。采用MUUEN算法设计镜场排列,在AM1.5d太阳光谱作为入射光时对提出的系统进行光学和热力学分析。采用拉萨典型气象年的太阳辐射数据,预测常规光伏发电、常规光热发电和本系统的全年发电量并进行对比。结果表明,在选定的气候条件下塔式分光谱热-光伏复合系统的综合发电量高于其他两种系统。

关键词：太阳能太阳能发电聚光太阳能光谱分频技术热力学分析

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禁欲时间对男性精液质量的影响

复旦学报（医学版） 2003年第4期30卷 391-393页

作者：李文英武俊青高尔生杨秋英陶建国陈锡宽上海市计划生育科学研究所-计划生育药具国家重点实验室上海200032

目的了解不同禁欲时间的男性精液质量状况,为临床治疗不育提供参考。方法对来自全国7个省市562名健康男性的精液质量进行分析。结果随着禁欲时间的延长,精液量、精子密度、精子总数都有所增加,差异有统计学意义(p<0.05)。结论精子... 详细信息

目的了解不同禁欲时间的男性精液质量状况,为临床治疗不育提供参考。方法对来自全国7个省市562名健康男性的精液质量进行分析。结果随着禁欲时间的延长,精液量、精子密度、精子总数都有所增加,差异有统计学意义(pd。精子活力差而精子数量足够的男性,则禁欲时间可以稍短,3 d左右即可。

关键词：禁欲时间男性不育症精液质量流行病学质量控制

The Inclination, pitch Angle and Forbidden Radius of Spiral Arms of pgC 35105

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chinese Journal of Astronomy and Astrophysics 2006年第2期6卷 175-180页

作者： tao Hu zheng-yi Shao qiu-He peng department of Astronomy Nanjing University Nanjing 210093 shanghai Astronomical Observatory Chinese-Academy of Sciences Shanghai 200030 Joint institute for galaxies and Cosmology Chinese Academy of Sciences Shanghai 200030 Joint Astrophysics Center of chinese academy of sciences-peking University Beijing 100871 The Open Laboratory of Cosmic Ray and High Energy Astrophysics Chinese Academy otSciences Beijing 100049

We have studied some properties including surface brightness in the u, g, r, i, and z bands of the nearly face-on galaxy pgC 35105. By subtracting a model surface brightness distribution from the observed image we obtain the residual image that shows only the spiral arms freed from the contamination by the bulge. From this we measured the the inclination, pitch angle, and forbidden radius （identified with the innermost point of the arm） for each of the two arms; and that for each of the five observing bands. We found these three parameters are largely independent of the observing band.

关键词： galaxies: fundamental parameters - galaxies: spiral - galaxies: structure - galaxies: surface brightness - galaxies: individual (pgC 35105)

performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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chinese physics C 2024年第2期48卷 1-25页

作者： g. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai g. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.p.A. Åkesson A.V. Akimov d. Akiyama N.N. Akolkar K. Al Khoury g.L. Alberghi J. Albert p. Albicocco g.L. Albouy S. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev g. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allendes Flores p.p. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.g. Alviggi M. Aly y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.g. Ames d. Amidei S.p. Amor dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.K. Anders S.y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold g. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani p.A. Atmasiddha K. Augsten S. Auricchio A.d. Auriol V.A. Austrup g. Avolio K. Axiotis g. Azuelos d. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea p. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos d. Bakshi gupta V. Balakrishnan R. Balasubramanian E.M. Baldin p. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak M. Barakat E.L. Barberio d. Barberis M. Barbero M.z. Barel K.N. Barends T. Barillari M-S. Barisits T. Barklow p. Baron d.A. Baron Mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard Model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 geV and 2 TeV and for multiple tagger working points.

关键词： ATLAS JET QUARK gLUON TAggINg

Nano-Ag inhibiting action potential independent glutamatergic synaptic transmission but increasing excitability in rat CA1 pyramidal neurons

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Nano-Ag inhibiting action potential independent glutamatergi...

中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： zhao-Wei LIU~1,guo-gang REN~3,tao zHANg~2,zhuo yang~(1,*) 1 College of Medicine,Key Laboratory of Bioactive Materials,Ministry of Education,Nankai University,Tianjin 300071, china 2 Science and Technology Research institute,University of Hertfordshire,Hatfield,Herts AL10 9AB,UK 3 College of Life Science,Nankai University,Tianjin 300071,china

＜正＞Objective The application of the nano-sized materials continues to grow at a rapid rate in the fields of medicine, biotechnology and environmental ***,their toxicology effects on humans and animals have been reported with risk assessments of *** aim of this study was to investigate the actions of silver nanoparticles （nano-Ag） on glutamatergic synaptic transmission and excitability in hippocampal CA1 pyramidal neurons. Methods Whole cell patch technique was used in the present *** The amplitude of action potential independent glutamatergic currents（miniature excitatory postsynaptic currents,mEpSCs） was inhibited by silver nanoparticles （nano-Ag 10-5 g/mL）,but the amplitude and frequency of action potential dependent glutamatergic currents （spontaneous excitatory postsynaptic currents,sEpSCs） were increased by nano-Ag ***,nano-Ag increased the spontaneous network activity without changing the threshold potential and rest membrane potential. Conclusion These results provide further insights into the underlying mechanisms responsible for the effects of nanoAg on central nervous system（CNS）.They must be valuable for the potential and safe applications for nano silver.

关键词： nano-Ag neurons mEpSCs sEpSCs spontaneous action potential

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改进的不对称三电平快速模型预测控制算法

电测与仪表 2024年第9期61卷 190-196页

作者：张大维尹渭贾慧章迅杨鑫邱晓初国网上海市电力公司电力科学研究院上海200051 西华大学电气与电子信息学院成都610039

针对多电平并网逆变器拓扑结构复杂、算法运算量大的问题,提出了一种新的非对称三相三电平拓扑结构及其改进的快速模型预测控制(fast model predictive contol,F-MpC)算法,与传统三电平逆变器拓扑结构相比具有更少的箝位器件,提高了系... 详细信息

针对多电平并网逆变器拓扑结构复杂、算法运算量大的问题,提出了一种新的非对称三相三电平拓扑结构及其改进的快速模型预测控制(fast model predictive contol,F-MpC)算法,与传统三电平逆变器拓扑结构相比具有更少的箝位器件,提高了系统的可靠性,降低了所需空间及成本;所提算法由于不用计算全部矢量的代价函数,大大缩短了计算时间,提高系统的响应速度。在MATLAB仿真模型和小型实验平台得到的结果验证了所提拓扑结构和算法的合理性及有效性。

关键词：并网多电平逆变器不对称拓扑快速模型预测控制代价函数