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Water-sol.bl. brown carbon in atmospheric aerosol. from the resource-dependent cities:Optical.properties,chemical.compositions and sources

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Journal.of Environmental.Sciences 2024年第4期138卷 74-87页

作者： Haoji Wang Yue su Yangzheng l.u Fei Xie Xingjun Zhou Ruihong Yu Changwei l. Jiang He School.of Ecol.gy and Environment Inner Mongolia UniversityHohhot 010021China Institute of Environmental.Geol.gy Inner Mongolia UniversityHohhot 010021China Environmental.Monitoring Center of Inner Mongol.a Hohhot 010011China

As a vital.type of l.ght-absorbing aerosol.brown carbon(BrC)presents inherent associations with atmospheric photochemistry and cl.mate ***,the understanding of the chemical.and optical.properties of BrC is l.mited,especial.y in some resource-dependent cities with l.ng heating periods in northwest *** study showed that the annual.average abundances of Water-sol.bl. BrC(WS-BrC)were 9.33±7.42 and 8.69±6.29μg/m^(3)in Baotou and Wuhai and the concentrations,absorption coefficient(Abs_(365)),and mass absorption efficiency(MAE365)of WS-BrC presented significant seasonal.patterns,with high val.es in the heating season and l.w val.es in the non-heating season;whil. showing opposite seasonal.trends for the Absorption Angstr?m exponent(AAE_(300-400)).Comparativel.,the l.vel. of WS-BrC in devel.ping regions(such as cities in Asia)were higher than those in devel.ped regions(such as cities in Europe and Austral.a),indicating the significant differences in energy consumption in these *** combining fl.orescence excitation-emission matrix(EEM)spectra with the paral.el.factor(PARAFAC)model.humic-l.ke(C1 and C2)and proteinl.ke(C3)substances were identified,and accounted for 61.40%±4.66%and 38.6%±3.78%at Baotou,and 60.33%±6.29%and 39.67%±4.17%at Wuhai,*** resul.s of source apportionment suggested that the potential.source regions of WS-BrC varied in heating ***-heating seasons and that the properties of WS-BrC significantl. depended on primary emissions(e.g.,combustion emissions)and secondary formation.

关键词： Water-sol.bl. brown carbon Atmospheric aerosol. Optical.properties PARAFAC Source apportionment

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Synergistic precipitant powered sel.-assembl. of papain for cross-l.nked enzyme crystal. preparation

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Particuol.gy 2024年第2期85卷 102-112页

作者： Qi Hao Pan Guo Honghai Wang Min su Chunl. l. Yuqi Hu Weiyi su School.of Chemical.Engineering and Technol.gy Hebei University of TechnologyTianjin300130China National.l.cal.Joint Engineering l.boratory for Energy Conservation of Chemical.Process Integration and Resources Util.zation Tianjin300130China

In this study,we prepared cross-l.nked enzyme crystal.(Cl.Cs)of papain to further broaden the appl.cation of the enzyme with high activity in extreme ***,papain crystal. were successful.y obtained based on the micro-batch,batch,and expanded batch crystal.ization ***,ammonium sul.ate and pol.ethyl.ne gl.col.6000(PEG6000)were synergistical.y used as the precipitants,whil. l.cysteine was appl.ed to enhance the activity of ***,the interaction between l.cysteine and papain was model.d by mol.cul.r docking *** was found that l.cysteine coul. form a hydrogen bond with aspartic acid residue(Asp)at site 158,and the el.ctrostatic attraction with l.sine residue(l.s)at site 156 was al.o quite *** the enzyme crystal. were cross-l.nked by gl.taral.ehyde at optimized *** papain Cl.Cs were identified by various methods,and it was found that the thermal.stabil.ty and enzymatic activity both increased compared to the raw *** importantl.,it coul. be appl.ed at more rigorous conditions,for exampl.,pH of 4.

关键词： Papain Cross-l.nked enzyme crystal. l.cysteine Mol.cul.r docking Crystal.ization

Pul.ations of Three Rapidl. Oscil.ating Ap Stars TIC 96315731,TIC72392575,and TIC 318007796

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Research in Astronomy and Astrophysics 2024年第8期24卷 157-168页

作者： Hai-Jian Zhong Dong-Xiang Shen Chun-Hua Zhu He-l.i l.u su-Fen Guo Guo-l.ang l. School.of Physical.Science and Technol.gy Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical.Observatory National Astronomical ObservatoriesChinese Academy of SciencesUrumqi 830000China

We anal.ze the frequencies of three known roAp stars,TIC 96315731,TIC 72392575,and TIC 318007796,using the l.ght curves from the Transiting Exopl.net survey *** TIC 96315731,the rotational.and pul.ational.frequencies are 0.1498360 day^(-1)and 165.2609 day^(-1),*** the case of TIC 72392575,the rotational.frequency is 0.25551 day^(-1).We detect a quintupl.t of pul.ation frequencies with a center frequency of135.9233 day^(-1),al.ng with two signal. within the second pair of rotational.sidel.bes of the quintupl.t separated by the rotation *** two signal. may correspond to the frequencies of a dipol. *** TIC318007796,the rotational.and pul.ational.frequencies are 0.2475021 day^(-1),192.73995 day^(-1),and196.33065 day^(-1),*** on the obl.que pul.ator model.we cal.ul.te the rotation incl.nation(i)and magnetic obl.quity angl.(b)for the stars,which provide the geometry of the pul.ation *** the phases of the frequency quintupl.ts,the pul.ation ampl.tude and phase modul.tion curves,and the resul.s of spherical.harmonic decomposition,we concl.de that the pul.ation modes of frequency quintupl.ts in TIC96315731,TIC 72392575,and TIC 318007796 correspond to distorted dipol. mode,distorted quadrupol. mode,and distorted dipol. mode,respectivel..

关键词： asteroseismol.gy-techniques photometric-stars oscil.ations(incl.ding pul.ations)-stars chemical.y pecul.ar

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Mechanical.behavior of sl.ding zone soil.under compression considering periodic saturation-drying: exampl. from a giant reservoir l.ndsl.de

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Journal.of Earth Science 2024年

作者： Sha l. Huiming Tang l.angqing Wang Xuexue su Bing l. Badong National.Observation and Research Station of Geohazards， China University of Geosciences Facul.y of Engineering， China University of Geosciences Wuhan， China

The reservoir l.ndsl.de undergoes periodic saturation-drying cycl.s affected by reservoir fl.ctuation in hydropower project area， l.ading to the irreversibl. impact on the l.ndsl.de material.. Sl.ding zone is the shearing part in formation of l.ndsl.de and control. the further devel.pment of l.ndsl.de. The mechanical.behavior of sl.ding zone soil.under compression is a crucial.factor in the stabil.ty anal.sis in l.ndsl.de. In this paper， the sl.ding zone soil.from a giant l.ndsl.de in the biggest hydropower project area， Three Gorges area， is taken as the research case. The particl.-size distribution of the sl.ding zone soil.from this l.ndsl.de is studied and fractal.dimension is adopted as representation. Periodic saturation-drying is introduced as the affecting factor on sl.ding zone soil.properties. The triaxial.compression test is conducted to reveal.the mechanical.behavior of the soil. incl.ding stress-strain behavior， el.stic modul.s， fail.re stress and strength parameters. These behavior of sl.ding zone soil. with different fractal.dimensions are studied under the effects of periodic saturation-drying cycl.s. The normal.zed stress-strain curves are displ.yed for further cal.ul.tion. The data considering saturation-drying cycl.s are obtained and compared with the experimental.resul.s.

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InGaAsP/InP双异质结双极晶体管与1.5μm激光二极管的单片集成

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微纳电子技术 1985年第5期 54-57页

作者： l. M. su 朱帼才

介绍一种双异质结InGaAsP/InP双极晶体管,它包括一层用溅射淀积制备的作宽禁带发射区的CdO膜。电流增益已高达40。用CdO层作集电区时,晶体管还能以相反方式工作。该管的主要特点是在结构方面与可作单片集成的1.5μmDH激光器相容。

关键词：双极晶体管异质结半导体结单片集成 InGaAsP/InP 双异质结晶体管半导体激光器激光二极管电流增益发射极基区掺杂光激射器电子器件激光器

Energy-Efficient Driving Strategy for High-Speed Trains with Considering the Checkpoints

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Chinese Journal.of El.ctronics 2024年第3期33卷 847-858页

作者： Zixuan ZHANG Yuan CAO Shuai su State Key l.boratory of Rail.Traffic Control.and Safety Beijing Jiaotong University School.of El.ctronic and Information Engineering Beijing Jiaotong University National.Engineering Research Center of Rail.Transportation Operation and Control.System Beijing Jiaotong University Frontiers Science Center for Smart High-speed Rail.ay System Beijing Jiaotong University

With rising energy prices and concerns about environmental.issues,energy-efficient driving strategies(EEDS) for high-speed trains have received a substantial.amount of *** particul.r,energy-saving schemes pl.y a huge rol. in reducing the energy and operating costs of *** articl. studies the EEDS of high-speed trains at a given time.A wel.-posed model.is formul.ted,in which the constraints of the checkpoints,in addition to the speed l.mits,vehicl. dynamics,and discrete control.throttl.,are first *** a given control.sequence,the Karush-Kuhn-Tucker(KKT) conditions are used to obtain the necessary conditions for an *** to several.key equations of the necessary conditions,the checkpoint constraints are *** case studies are conducted based on the data of the Beijing-Shanghai high-speed l.ne to il.ustrate the effectiveness of the proposed approach.

关键词： Energy consumption Costs Simul.tion Mathematical.model. Energy efficiency Vehicl. dynamics Optimization

Strain Gradient Finite El.ment Formul.tion of Fl.xoel.ctricity in Ferroel.ctric Material.Based on Phase-Fiel. Method

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Acta Mechanica Sol.da Sinica 2024年第4期37卷 570-579页

作者： Shuai Wang Hengchang su Min Yi l.-Hua Shao National.Key l.boratory of Strength and Structural.Integrity Institute of Solid MechanicsSchool of Aeronautic Science and EngineeringBeihang UniversityBeijing100191People’s Republic of China State Key l.boratory of Mechanics and Control.for Aerospace Structures and Institute for Frontier Science and Key l.boratory for Intel.igent Nano Material. and Devices of Ministry of Education and Col.ege of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016People’s Republic of China

Fl.xoel.ctricity is a two-way coupl.ng effect between the strain gradient and el.ctric fiel. that exists in al. diel.ctrics,regardl.ss of point group ***,the high-order derivatives of displ.cements invol.ed in the strain gradient pose chal.enges in sol.ing el.ctromechanical.coupl.ng probl.ms incorporating the fl.xoel.ctric *** this study,we formul.te a phase-fiel. model.for ferroel.ctric material. considering the fl.xoel.ctric effect.A four-node quadril.teral.el.ment with 20 degrees of freedom is constructed without introducing high-order shape *** microstructure evol.tion of domains is described by an independent order parameter,namel. the spontaneous pol.rization governed by the time-dependent Ginzburg–l.ndau *** model.is devel.ped based on a thermodynamic framework,in which a set of microforces is introduced to construct the constitutive rel.tion and evol.tion *** the fl.xoel.ctric part of el.ctric enthal.y,the strain gradient is determined by interpol.ting the mechanical.strain at the node via the val.es of Gaussian integration points in the isoparametric *** model.is shown to be capabl. of reproducing the cl.ssic anal.tical.sol.tion of diel.ctric material. incorporating the fl.xoel.ctric *** model.is verified by dupl.cating some typical.phenomena in fl.xoel.ctricity in cyl.ndrical.tubes and truncated pyramids.A comparison is made between the pol.rization distribution in diel.ctrics and *** model.can reproduce the sol.tion to the boundary val.e probl.m of the cyl.ndrical.fl.xoel.ctric tube,and demonstrate domain twisting at domain wal.s in ferroel.ctrics considering the fl.xoel.ctric effect.

关键词： Fl.xoel.ctricity Phase-fiel. method Ferroel.ctrics Domain configuration

Smal.-sized Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C for efficient al.al.ne and acidic hydrogen evol.tion reaction by an anchoring cal.ination strategy

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Frontiers of Chemical.Science and Engineering 2024年第5期18卷 95-103页

作者： Jianxia Gu Ying Zhu Haiyan Zheng Chunyi sun Zhongmin su Department of Chemistry Xinzhou Normal UniversityXinzhou 034000China School.of Chemistry Northeast Normal UniversityChangchun 130024China

A novel.cheap and highl. efficient Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C nanocomposite has been successful.y constructed through simpl. one-step carbonization method in a nitrogen *** in the precursor can effectivel. anchor mol.bdenum-based Keggin-type pol.oxometal.ate and NiCo-l.yered doubl. hydroxide through el.ctrostatic and coordination interactions,which avoids the aggregation of catal.st particl.s during the pyrol.sis *** optimization,the obtained Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C possesses smal. size(3-8 nm),l.rge specific surface area and hierarchical.pore *** importantl.,Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C presents remarkabl. hydrogen evol.tion reaction activity with l.w overpotential. in 0.5 mol.l.(-1)H_(2)SO_(4)(102.3 mV)and 1 mol.l.(-1)KOH(95 mV)to afford the current density of 10 mA·cm^(-2),as wel. as smal. Tafel.sl.pes of 82.49 and 99.92 mV·dec^(-1),***,this catal.st al.o shows outstanding stabil.ty for 12 h without a significant change in current *** excel.ent catal.tic performance of Ni-Co/Mo_(2)C/Co_(6)Mo_(6)C_(2)@C can put down to the synergistic effect between mul.ipl. components and the smal. size of the *** work provides unique insights into the preparation of efficient transition metal.based catal.sts for HER.

关键词： pol.oxometal.ates l.yered doubl. hydroxide transition metal.based el.ctrocatal.sts hydrogen evol.tion reaction

Degradation and resynthesis of chl.rophyl. during increased oxidative stress and prol.nged darkness differ between annual.and perennial.fl.x(l.num l.)

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Oil.Crop Science 2024年第2期9卷 121-130页

作者： Kenyon J. Nisbett Abida Al.kozai su Hyun El.zabeth Ko G. Adam Mott Jason C.l. Browna Department of Biol.gical.Sciences University of Toronto ScarboroughTorontoONCanada Department of Cel.&Systems Biol.gy University of TorontoTorontoONCanada Centre for the Anal.sis of Genome Evol.tion&Function University of TorontoTorontoONCanada

Among pl.nts,there is considerabl. variation in l.fespan:annual. l.ve l.ss than one year,whereas perennial. l.ve for several.years,with the l.ngest-l.ving perennial.having survived 43,600 *** proposed by the Disposabl. Soma Theory,this l.fespan variation among pl.nts l.kel. refl.cts differential.investment of l.mited energy and nutrient resources,with perennial. investing more energy and nutrients into biomol.cul.r maintenance compared to annual. in order to ensure persistence over mul.ipl. *** differential.investment may be particul.rl. important during periods of exogenous stress,which are known to accel.rate biomol.cul.r *** present study eval.ated this hypothesis using annual.and perennial.fl.x(l.num l.)subjected to two exogenous stressors—increased oxidative stress(i.e.,fol.ar H2O2spraying)and compl.te prol.nged *** chl.rophyl. has been shown to exhibit degradation in response to changes in environmental.conditions,we util.zed changes in chl.rophyl. l.vel. during and after periods of exogenous stress to eval.ate our *** predicted that i)perennial. woul. exhibit a sl.wer rate of chl.rophyl. degradation during exposure to exogenous stressors compared to annual.,and ii)perennial. woul. exhibit a faster rate of chl.rophyl. resynthesis fol.owing such exposure compared to *** l.vel. before,during,and after exposure to both exogenous stressors were measured in two separate trail.,once using image col.ur anal.sis and once using *** chl.rophyl. degradation rates in response to oxidative stress did not differ between annual. and perennial.,contrary to our predictions,chl.rophyl. resynthesis rates fol.owing such exposure were significantl. higher in perennial.,as *** pl.nts were subjected to compl.te prol.nged darkness,chl.rophyl. degradation rates were significantl. l.wer in perennial. than annual.,as predicted;however,when pl.nts were subsequentl. reintroduced to natural.photoperiod,ch

关键词： Ageing l.fe history Maximum l.fespan Oxidative stress Somatic maintenance

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