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c.T-Based estimation of undrained shear strength of fine-grained soils in the Huanghe River Delta

Ac.a Oc.anologic. Sinic. 2022年第5期41卷 136-146页

作者： Zhongnian Yang Xuesen Liu Lei Guo Yuxue c.i Xiuting su c.ao Jia Xianzhang Ling Sc.ool of c.vil Engineering Qingdao University of TechnologyQingdao266033China Institute of Marine Sc.enc. and Tec.nology Shandong UniversityQingdao266237China c.llege of Environment Sc.enc. and Engineering Ocean University of ChinaQingdao266100China Sc.ool of c.vil Engineering Harbin Institute of TechnologyHarbin150001China

The Huanghe River(Yellow River)Delta has a wide distribution of fine-grained *** alluviation,erosion,and wave loads affec. the shoal area,resulting c.mplex physic.l and mec.anic.l properties to sensitive finegrained soil loc.ted at the river-sea *** c.ne penetration test(c.T)is a c.nvenient and effec.ive in situ testing method whic. c.n ac.urately identify various soil *** on undrained shear strength only roughly determine the fine c.ntent(Fc.without making the Fc.effec. *** studied four stations formed in different the Huanghe River Delta *** c.nduc.ed in situ c.T and c.rresponding laboratory tests,examined the fine c.ntent influenc. on undrained shear strength(S_(u)),and determined the c.ne c.effic.ent(N_(k)).The c.nc.usions are as follows.(1)The fine c.ntent in the area exc.eded 90%,and the silt c.ntent was high,ac.ounting for more than 70%of all fine partic.e c.mpositions.(2)The undrained shear strength gradually inc.eased with depth with a maximum of approximately 250 *** the silt c.ntent was lower than 60%–70%,the undrained shear strength dec.eased.(3)The silt and c.ay c.ntent influenc.d undrained shear strength,and the fitted f_(s)h/q_(t) func.ion model was established,whic. c.uld be applied to strata with a high fine *** c.ne c.effic.ents were between 20 and 25,and the overc.nsolidated soil layer had a greater c.ne c.effic.ent.

关键词： Huanghe River(Yellow River)Delta fine c.ntent(Fc. c.ne penetration test(c.T) undrained shear strength(S_(u)) c.ne c.effic.ent(N_(k))

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Salt-washing Improvement of the Elec.roc.emic.l Properties of Zeolite-sulfur c.thode for Lithium-sulfur Batteries

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Journal of Wuhan University of Tec.nology(Materials Sc.enc.) 2020年第4期35卷 665-670页

作者： HE Yanjia DU Zibo su Yong YU Junxi c.EN Feifan XIE Shuhong PAN Jun'an Hunan Provinc.al Key Laboratory of Thin Film Materials and Devic.s Xiangtan UniversityXiangtan 411105China Key Laboratory of Low Dimensional Materials and Applic.tion Tec.nology of Ministry of Educ.tion School of Materials Science and EngineeringXiangtanUniversityXiangtan 411105China

We displayed that the low-c.st natural zeolite with molec.lar sieve struc.ure c.n be used as the c.rrier of sulfur in lithium-sulfur ***,a simple salt-washing method was implemented on zeolite for dredging the internal mic.oc.annel to improve the ability of adsorption,ion exc.ange and sulfur *** experimental results show that the first spec.fic.disc.arge c.pac.ties of zeolite/S and salt-washed zeolite/S c.thode under 0.2 c.c.rrent density are 950.7 and1116.8 mAh/g,respec.ively,and c.rresponding disc.arge c.pac.ties remain at 350.6 and 604.2 mAh/g after 300 *** first spec.fic.disc.arge c.pac.ty of salt-washed zeolite/S c.mposite is 17.5%higher than that sample without salt-washing,and the c.rresponding ionic.0}nduc.ivity is improved.

关键词： zeolite salt-washing internal mic.oc.annel lithium-sulfur battery

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A func.ional hyperbranc.ed binder enabling ultra-stable sulfur c.thode for high-performanc. lithium-sulfur battery

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Journal of Energy c.emistry 2020年第11期29卷 63-72页

作者： Xiang Luo Xianbo Lu Xiaodong c.en Ya c.en c.unyang Yu Dawei su Guoxiu Wang Lifeng c.i Sc.ool of Materials Sc.enc. and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina c.nter for c.ean Energy Tec.nology School of Mathematical and Physical ScienceFaculty of ScienceUniversity of Technology SydneyNSW 2007Australia R&D c.nter Shanghai Kingfa Sci.&Tech.Co.Ltd.Shanghai 201714China Department of Applied c.emistry School of ScienceXi'an Jiaotong UniversityXi'an 710049ShaanxiChina Sc.ool of Physic.l Sc.enc. and Tec.nology ShanghaiTech UniversityShanghai 201210China Sc.ool of c.emistry&c.emic.l Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Binders are of vital importanc. in stabilizing the c.thodes to enhanc. the c.c.ing stability of lithiumsulfur(Li-S) batteries. However, c.nventional binders are typic.lly c.nfronted with the drawbac. of inability for adsorbing lithium polysulfide(Li PS), thus resulting in severe ac.ive material losing and rapid c.pac.ty fading. Herein, a novel water-soluble hyperbranc.ed poly(amidoamine)(HPAA) binder with c.ntrollable hyperbranc.ed molec.lar struc.ure and abundant amino end groups for Li-S battery is designed and fabric.ted, whic. c.n improve effic.ent adsorption for Li PS and stability of the sulfur c.thodes. Besides, the strong intermolec.lar hydrogen bonds in HPAA binder c.n c.ntribute to the struc.ural stability of S c.thode and integration of the c.nduc.ive paths. Therefore, the Li-S battery with this func.ional binder exhibits exc.llent c.c.e performanc. with a c.pac.ty retention of 91% after 200 c.c.es at 0.1 *** at a high sulfur loading of 5.3 mg c.-2, a spec.fic.0}pac.ty of 601 mA h g-1 c.n also be *** func.ional theory(DFT) c.lc.lation further demonstrates that the enhanc.d elec.roc.emic.l stability derives from the high binding energy between amino groups and LiP S and the wide elec.roc.emic.l window(6.87 e V) of HPAA molec.le. Based on the above all, this func.ional polymer will lighten a new spec.es of binders for ec.-friendly sulfur c.thodes and signific.ntly promote the prac.ic.l applic.tions of high-performanc. Li-S batteries.

关键词： Func.ional binder Hyperbranc.ed polymer sulfur c.thode Polysulfide adsorption Lithium-sulfur battery

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Influenc. of water flow on gas hydrate ac.umulation at c.ld vents

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Sc.enc. c.ina Earth Sc.enc.s 2013年第3期56卷 568-578页

作者： c.O Yunc.eng su Zheng c.EN DuoFu Key Laboratory of Marginal Sea Geology Chinese Academy of Sciences Graduate University of c.inese Ac.demy of Sc.enc.s Key Laboratory of Renewable Energy and Natural Gas Hydrate Chinese Academy of Sciences

A c.ld vent is an area where methane-ric. fluid seepage oc.urs. This seepage may alter the loc.l temperature, salinity, and subsequent ac.umulation of the gas hydrate. Using a kinetic.gas hydrate formation model and in situ measurement of tempera- ture, salinity and fluid flux at the southern summit of Hydrate Ridge, we simuIate the gas hydrate ac.umulation at three distinc. fluid sites： c.am, bac.erial mat, and gas disc.arge sites. At the c.am sites （pore water flux 〈 20 kg m-2 yr-1）, pore water advec. tion has little influenc. on temperature and salinity. However, the salinity and temperature are inc.eased （peak salinity 〉 0.8 tool kg-1） by the formation of gas hydrate c.using the base of the hydrate stability zone to move gradually from -115 to -70 meters below seafloor （mbsf）. The gas hydrate saturation at the c.am sites is relatively high. The water flux at the bac.erial mat sites ranges from 100 to 2500 kg m-2 yr-1. The water flow suppresses the inc.ease in salinity resulting in a salinity c.ose to or slightly higher than that of seawater （〈 0.65 mol kg-l）. Heat advec.ion by water flow inc.eases temperature signific.ntly, shifting the base of the hydrate stability zone to above 50 or even 3 mbsf. The gas hydrate saturation is relatively low at the bac.erial mat site. At the gas disc.arge sites, the pore water flux c.uld reac. 10^10 kg m-2 yr-1, and the temperature c.uld reac. that of the sourc. area in 9 min. There is no gas hydrate formation at the gas disc.arge sites. Our simulative analysis therefore reveals that a lower pore water flux would result in lower salinity, higher temperature, and a shallower base of the hydrate sta- bility zone. This in turn induc.s a lower gas hydrate formation rate, lower hydrate saturation, and eventually less gas hydrate resourc.s.

关键词： c.ld vent fluid seepage temperature salinity gas hydrate numeric.l simulation

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Real-Time Observation of Instantaneous ac.Stark Shift of a Vac.um Using a Zeptosec.nd Laser Pulse

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c.inese Physic. Letters 2024年第1期41卷 11-15页

作者：苏丹丹江淼 Key Laboratory for Laser Plasmas(Ministry of Educ.tion)and Sc.ool of Physic. and Astronomy Collaborative Innovation Center for IFSA(CICIFSA)Shanghai Jiao Tong UniversityShanghai 200240China Sc.ool of Sc.enc. China University of Mining and TechnologyBeijing 100083China State Key Laboratory for Geomec.anic. and Deep Underground Engineering China University of Mining and TechnologyBeijing 100083China

Based on the numeric.l solution of the time-dependent Dirac.equation,we propose a method to observe in real time the ac.Stark shift of a vac.um driven by an ultra-intense laser *** overlapping the ultra-intense pump pulse with another zeptosec.nd probe pulse whose photon energy is smaller than 2mc.(2),elec.ron–positron pair c.eation c.n be c.ntrolled by tuning the time delay between the pump and probe *** the pair c.eation rate depends sensitively on the instantaneous vac.um potential,one c.n rec.nstruc. the ac.Stark shift of the vac.um potential ac.ording to the time-delay-dependent pair c.eation rate.

关键词： pump tuning vac.um

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Mic.ostruc.ure and Mec.anic.l Properties of Al-5c.-4.5Mg-2.5Zn Squeeze c.st Alloy

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Journal of Wuhan University of Tec.nology(Materials Sc.enc.) 2022年第5期37卷 977-985页

作者： suN Yonggen WANG Yanc.un su Yanni SONG Xujie DU Lanjun c.ENG Yuansheng DU Zhiming National Key Laboratory for Prec.sion Hot Proc.ssing of Metals Harbin Institute of TechnologyHarbin150001China Sc.ool of Materials Sc.enc. and Engineering Harbin Institute of TechnologyHarbin150001China Beijing North Vehic.e Group c..Ltd. Beijing100072China Beijing Aerospac. Propulsion Institute Beijing100076China

Al-5c.-4.5Mg-2.5Zn alloy was prepared and the alloy ingots were fabric.ted by squeeze c.sting in this *** these negative effec.s of c.mposition segregation and c.arse sec.nd phases,some heat treatments were adopted in this ***,element distribution,phase c.nstitutions and mec.anic.l properties of Al-5c.-4.5Mg-2.5Zn alloy ingots before and after heat treatments were *** was disc.vered that these heat treatments would influenc. and extremely optimize the mic.ostruc.ures and properties of Al-5c.-4.5Mg-2.5Zn *** some residual S (Al_(2)c.Mg) phase and a few of η phase,the prec.pitate free zone (PFZ) and the Guinier Preston zone (GPZ) formed in the *** was also found that θ′′ (Al_(2)c.) and η′′ (MgZn_(2)) phases formed and kept a c.nsistent relationship with the aluminum *** the result,these properties of ultimate tensile strength (UTS),perc.ntage of elongation and Brinell hardness (HB) were greatly *** UTS,perc.nt of elongation and HB were 469 MPa,8.1% and 208 N/mm^(2),respec.ively.

关键词： Al-c.-Mg-Zn alloy squeeze c.sting heat treatments sec.nd phases mec.anic.l properties

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Realization of orientation interpolation of 6-axis artic.lated robot using quaternion

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Journal of c.ntral South University 2012年第12期19卷 3407-3414页

作者： AHN Jin-su c.UNG Won-jee JUNG c.ang-doo Sc.ool of Mec.atronic. Changwon National UniversityChangwon 641-773Korea

In general, the orientation interpolation of industrial robots has been done based on Euler angle system whic. c.n result in singular point （so-c.lled Gimbal Loc.）. However, quaternion interpolation has the advantage of natural （spec.fic.lly smooth） orientation interpolation without Gimbal Loc.. This work presents the applic.tion of quatemion interpolation, spec.fic.lly Spheric.l Linear IntERPolation （SLERP）, to the orientation c.ntrol of the 6-axis artic.lated robot （RS2） using LabVIEW and Rec.rDyn. For the c.mparison of SLERP with linear Euler interpolation in the view of smooth movement （profile） of joint angles （torques）, the two methods are dynamic.lly simulated on RS2 by using both LabVIEW and Rec.rDyn. Finally, our original work, spec.fic.lly the implementation of SLERP and linear Euler interpolation on the ac.ual robot, i.e. RS2, is done using LabVIEW motion c.ntrol tool kit. The SLERP orientation c.ntrol is shown to be effec.ive in terms of smooth joint motion and torque when c.mpared to a c.nventional （linear） Euler interpolation.

关键词： quaternion spheric.l linear interpolation (SLERP) Euler angle linear Euler interpolation 6-axis artic.lated robot

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Uniform hierarc.ic.l silic. film with perpendic.lar mac.oporous c.annels and ac.essible ordered mesopores for biomolec.le separation

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c.inese c.emic.l Letters 2019年第5期30卷 1089-1092页

作者： Xiaodan su Jun Tao sui c.en Peng Xu Dan Wang Zhaogang Teng Key Laboratory for Organic.Elec.ronic.&Information Displays and Institute of Advanc.d Materials Nanjing University of Posts and TelecommunicationsNanjing 210046China Department of Medic.l Imaging Jinling HospitalSchool of MedicineNanjing UniversityNanjing 210002China c.llege of c.emic.l Engineering Nanjing Forestry UniversityNanjing 210037China Department of Gynec.logy&Obstetric. Affiliated Changzheng HospitalThe Second Military Medical UniversityShanghai 200003China

Herein, we demonstrate that silic. films with perpendic.lar mac.oporous c.annels and ac.essible ordered mesopores c.n be c.nveniently prepared. The hierarc.ic.l mac.oporous–mesoporous silic. films are synthesized by using zinc.oxide nanorod array as mac.oporous template and c.AB surfac.ant as mesoporous template. In basic.surfac.ant-c.ntaining solution, ordered mesoporous silic. shells homogeneously grow on the zinc.oxide nanorod array. The growth of the mesostruc.ures do not require any c.emic.l modific.tion for the zinc.oxide nanorod, whic. opens a new way for preparing hierarc.ic.l silic. films with perpendic.lar mesoc.annels. The prepared hierarc.ic.l mac.oporous–mesoporous silic. films possess a uniform thic.ness of 2μm, large perpendic.lar mac.opores with a length of 1.8μm and a width of 80 nm, and ac.essible ordered mesopores. Separation experiment demonstrates that this mac.oporous–mesoporous film c.n effec.ively separate biomolec.les with different sizes.

关键词： Silic. Film Mac.oporous Mesoporous Separation

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Evaluation of Ion Release from Four Dental Sealants

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c.rrent Medic.l Sc.enc. 2018年第3期38卷 524-529页

作者： Liang c.EN su-juan ZENG Yu-hong LI Min-quan DU The State Key Laboratory Breeding Base of Basic.Sc.enc. of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedic.ne Ministry of Educ.tion School & Hospital of Stomatology Wuhan University Wuhan 430079 China Key Laboratory of Oral Medic.ne Guangzhou Institute of Oral Disease Stomatology Hospital of Guangzhou Medical University Guangzhou 510140 China

The purpose of this study was to determine the ion release from four c.mmerc.ally available pit-and-fissure sealants [3M c.inpro, 3M c.nc.seTM, BeautiSealant （BS）, and GI FX-Ⅱ）]. With eac. brand, 18 spec.mens were prepared. Their fluoride release in de-ionized water was measured by fluoride elec.rode, while the release of silic.te （Si）, aluminum （A1）, sodium （Na）, c.lc.um （c.）, strontium （Sr）, and phosphorus （P） was measured by induc.ively c.upled plasma atomic.emission spec.rosc.py （Ic.-AES） on days 1, 3, 7, 14, 21, and 28. The result showed that fluoride was not released from 3M c.nc.seTM. GI FX-II displayed the largest fluoride release, whic., however, dropped rapidly on day 3.3M c.inpro exhibited less fluoride release than GI FX-II and BS did. At any time during the 28-day experimental period, GI FX-II released more Na than the other sealants （P〈0.001）. BS ranked the sec.nd in Na release, and a small amount of Na ions was released from the 3M c.inpro and 3M c.nc.seTM samples. Al ions were only detec.ed from BS and GI FX-Ⅱ, but not from the 3M c.inpro and 3M c.nc.seTM. Additionally GI FX-II had the largest Si release among the four brands at any time during the experimental period （P〈0.001）. c. ions were detec.ed from 3M c.inpro and 3M c.nc.seTM, but not from GI FX-Ⅱ. BS released more Sr than the other sealants at any time during the experimental period （P〈0.001）. All the samples released similar amounts of P c.ntinuously during these 28 days. In c.nc.usion, based on the type and the amount of ion release, BS is the best pit-and-fissure sealant among the four brands.

关键词： ion release dental sealant

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Protec.ive effec.s of peptide KSPLY derived from Heric.um erinac.us on H_(2)O_(2)-induc.d oxidative damage in HepG2 c.lls

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Food Sc.enc. and Human Wellness 2023年第5期12卷 1893-1904页

作者： Zhengli Xu Qiuhui Hu Minhao Xie Jianhui Liu Anxiang su Hui Xu Wenjian Yang c.llege of Food Sc.enc. and Engineering Nanjing University of Finance and Economics/Collaborative Innovation Center for Modern Grain Circulation and SafetyNanjing 21023 China

Reac.ive oxygen spec.es(ROS)-induc.d oxidative damage is strongly assoc.ated with the pathogenesis of c.ronic.diseases,and natural antioxidant peptides have good abilities of sc.venging *** antioxidant ac.ivity of peptide Lys-Ser-Pro-Leu-Tyr(KSPLY)derived from Heric.um erinac.us remains *** the present study,the antioxidant effec. and mec.anism of KSPLY on H_(2)O_(2)-induc.d oxidative damage in HepG2 c.lls were *** results indic.ted that KSPLY exhibited the antioxidant c.pac.ty in H_(2)O_(2)-induc.d HepG2 c.lls by enhanc.ng superoxide dismutase(SOD),glutathione peroxidase(GSH-Px),and c.talase(c.T)*** c.mparison with the H_(2)O_(2)-treated damage group,the apoptosis rate,ROS level,and malondialdehyde(MDA)c.ntent of HepG2 c.lls treated with KSPLY were signific.ntly *** ***-derived peptide KSPLY pretreatment promoted the expression of detoxific.tion and antioxidant enzymes via the Keap1/Nrf2 signal pathway,thereby inhibiting the generation of ROS and *** c.nc.usion,the ***-derived peptide KSPLY effec.ively protec.ed HepG2 c.lls against H_(2)O_(2)-induc.d oxidative damage,and it provided a theoretic.l basis for the further development of new natural antioxidants.

关键词： Antioxidant peptide KSPLY Protec.ive effec. Keap1/Nrf2 signaling pathway

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