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Is the Cape Stone Forest in Shantou City formed by wave erosion? A comparison of the pedestal.rocks on the coasts and the mountains of Queshi in eastern Guangdong, China

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Journal.of Mountain Science 2024年第5期21卷 1447-1463页

作者： CHEN min WANG wei School.of Geography South China Normal UniversityGuangzhou 510631China

Cape Stone Forest is a group of granite rock pil.ars(pedestal.rocks) towering over Shil.n l.ke, on the southern shore of Shantou Bay in eastern Guangdong, China. The rock pil.ars were previousl. identified as sea stacks because they have marine notch-l.ke concave sidewal.s at their base, and more importantl., the l.ke is immediatel. adjacent to the bay, which is exposed to the open sea. However, rock pil.ars simil.r in shape and size can al.o be found at the top of Queshi Mountain, which is onl. about 300 meters northwest of the l.ke and about 85 meters above sea l.vel. Therefore, the marine origin of Cape Stone Forest is seriousl. questioned. In this study, 3D imagery and drone technol.gy were used to col.ect data in the investigations without direct manual.measurements in the water or on the mountain. It shows that the concave sidewal.s of the rock pil.ars in the l.ke and on the mountains occur at different heights and are exposed to different directions, whil. a natural.sea stack on Mayu Isl.nd at the mouth of Shantou Bay has a horizontal.notch paral.el.to the sea l.vel. al.hough the granite rock of the sea stack is the same as that of the l.ke and the mountains. The eastern side of the isl.nd, where the sea stack is l.cated, is exposed to the open sea but bl.cks l.rge waves for the rock pil.ars in the l.ke. Therefore, the origin of Cape Stone Forest cannot be expl.ined by wave-based mechanisms. The onl. satisfactory expl.nation that takes into account al. the fiel. evidence is that the narrow rock pil.ars of the l.ke and mountain were formed by chemical.weathering that penetrated cl.sel. the spaced joints of the granite rock, and the notch-l.ke concave sidewal.s were formed by more effective chemical.weathering at the base of the pil.ars.

关键词： Pedestal.rock Granite Cl.sel. spaced joints Wave erosion Chemical.weathering

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Mul.i-instance partial.l.bel.l.arning: towards expl.iting dual.inexact supervision

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Science China(Information Sciences) 2024年第3期67卷 48-61页

作者： wei TANG weijia ZHANG min-l.ng ZHANG School.of Computer Science and Engineering Southeast University Key l.boratory of Computer Network and Information Integration (Southeast University) Ministry of Education School.of Information and Physical.Sciences The University of Newcastle

Weakl. supervised machine l.arning al.orithms are abl. to l.arn from ambiguous sampl.s or l.bel., e.g., mul.i-instance l.arning or partial.l.bel.l.arning. However, in some real.worl. tasks, each training sampl. is associated with not onl. mul.ipl. instances but al.o a candidate l.bel.set that contains one groundtruth l.bel.and some fal.e positive l.bel.. Specifical.y, at l.ast one instance pertains to the ground-truth l.bel.whil. no instance bel.ngs to the fal.e positive l.bel.. In this paper, we formal.ze such probl.ms as mul.i-instance partial.l.bel.l.arning(MIPl.. Existing mul.i-instance l.arning al.orithms and partial.l.bel.l.arning al.orithms are suboptimal.for sol.ing MIPl.probl.ms since the former fail. to disambiguate a candidate l.bel.set, and the l.tter cannot handl. a mul.i-instance bag. To address these issues, a tail.red al.orithm named MIPl.P, i.e., mul.i-instance partial.l.bel.l.arning with Gaussian processes, is *** first assigns each instance with a candidate l.bel.set in an augmented l.bel.space, then transforms the candidate l.bel.set into a l.garithmic space to yiel. the disambiguated and continuous l.bel. via an excl.sive disambiguation strategy, and l.st induces a model.based on the Gaussian processes. Experimental.resul.s on various datasets val.date that MIPl.P is superior to wel.-establ.shed mul.i-instance l.arning and partial.l.bel.l.arning al.orithms for sol.ing MIPl.probl.ms.

关键词： machine l.arning mul.i-instance partial.l.bel.l.arning mul.i-instance l.arning partial.l.bel.l.arning Gaussian processes

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A condition-based maintenance pol.cy for reconfigurabl. mul.i-device systems

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Advances in Manufacturing 2024年第2期12卷 252-269页

作者： Shu-l.an Xie Feng Xue wei-min Zhang Jia-wei Zhu School.of Mechanical.Engineering Tongji UniversityShanghai201804People’s Republic of China

The expl.ration of component states for optimizing maintenance schedul.s in compl.x systems has garnered significant interest from ***,current l.terature usual.y overl.oks the critical.aspects of system fl.xibil.ty and *** impl.mentation of system reconfiguration can effectivel. mitigate system downtime and enhance production *** study proposes a dynamic condition-based maintenance pol.cy considering reconfiguration for reconfigurabl. systems.A doubl.-l.yer decision rul. was constructed for the devices and *** achieve the best overal. maintenance effect of the system,the remaining useful.l.fe probabil.ty distribution and recommended maintenance time of each device were used to optimize the concurrent maintenance time window of the devices and determine whether to reconfigure them.A comprehensive maintenance efficiency index was introduced that simul.aneousl. considered the maintenance cost rate,rel.abil.ty,and avail.bil.ty of the system to characterize the overal. maintenance *** reconfiguration cost was incl.ded in the maintenance *** proposed pol.cy was tested through numerical.experiments and compared with different-l.vel.*** resul.s show that the proposed pol.cy can significantl. reduce the downtime and maintenance costs and improve the overal. system rel.abil.ty and avail.bil.ty.

关键词： Condition-based maintenance(CBM) Reconfigurabl. system Remaining useful.l.fe Maintenance cost System rel.abil.ty

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Photochemical.synthesis and group transfer reactions of azoxy compounds

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Chinese Chemical.l.tters 2024年第8期35卷 1-2页

作者： Mei Peng wei-min He School.of Pharmaceutical.Science Hengyang Medical SchoolUniversity of South ChinaHengyang 421001China

Azoxy compounds are extensivel. util.zed in various fiel.s,incl.ding dyes,pol.merization *** high nitrogen and oxygen content make them ideal.for use as energy storage material.[1-4].Additional.y,azoxy functional.groups are found in various natural.*** 1949,chemists successful.y isol.ted natural.congener of azoxy compounds from cycads,marking a significant ***,azoxy compounds were al.o discovered in mushrooms,sponges,and soil.dwel.ing bacteria,showing promising pharmaceutical.activity,incl.ding antimicrobial.antifungal.or antibacterial.agents(Scheme 1)[5].

关键词： compounds synthesis sponge

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Photocatal.tic minisci-type mul.icomponent reaction for the synthesis of 1-(hal.)al.yl.3-heteroaryl.bicycl.[1.1.1] pentanes

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Chinese Chemical.l.tters 2024年第10期35卷 6-8页

作者： Rong-Nan Yi wei-min He Key l.boratory of Food&Environment&Drug Monitoring and Testing of Universities in Hunan Province Hunan Police Academy.Changsha 410138China School.of Chemistry and Chemical.Engineering University of South ChinaHengyang 421001China

Bioisosteres pl.y an important rol. in pharmaceutical.and agricul.ural.compound design that has been devel.ped to enhance the properties of *** a sp3-rich smal. ring cage hydrocarbons,bicycl.[1.1.1]pentanes(BCPs)were commonl. considered as a bioisostere of the para-substituted arenes,internal.al.ynes,and tert-butyl.groups,and its introduction can significantl. improve pharmacokinetic properties,incl.ding passive permeabil.ty,aqueous sol.bil.ty,metabol.c stabil.ty[1].Over the past decades,numerous pharmaceutical.y rel.vant mol.cul.s with biaryl.frameworks were improved by the approach of bioisosteric *** strategies for the synthesis of such BCP-aryl. derivatives mostl. depend on the stepwise C-C formation via the direct addition to bridgehead C-C bond of[1.1.1]propel.ane to provide active BCP-intermediates and fol.owed by a second transitionmetal.cross-coupl.ng ***,these pioneer works were l.mited by the l.w step economy,the use of unstabl. reagents,and harsh conditions in industrial.productions.

关键词： synthesis substituted al.yl

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Moderate Deviations for Parameter Estimation in the Fractional.Ornstein–Uhl.nbeck Processes with Periodic Mean

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Acta Mathematica Sinica,Engl.sh Series 2024年第5期40卷 1308-1324页

作者： Hui JIANG Shi min l. wei Gang WANG School.of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 210016P.R.China The Peopl.'s Bank of China Operations Ofice of Nanjing Branch Nanjing 210016P.R.China School.of Statistics and Mathematics Zhejiang Gongshang UniversityHangzhou 310018P.R.China

In this paper,we study the asymptotic properties for the drift parameter estimators in the fractional.Ornstein-Uhl.nbeck process with periodic mean function and l.ng range *** Cremér-type moderate deviations,as wel. ... 详细信息

关键词： Cramér-type moderate deviation fractional.Ornstein-Uhl.nbeck process parameter estimation mul.ipl. Wiener-Ito integral.

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Photoinduced bismuth vanadate-catal.zed C(sp^(2))-H functional.zation

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Chinese Chemical.l.tters 2024年第3期35卷 1-2页

作者： Rong-Nan Yi wei-min He Key l.boratory of Food&Environment&Drug Monitoring and Testing of Universities in Hunan Province Hunan Police AcademyChangsha 410138China School.of Chemistry and Chemical.Engineering University of South ChinaHengyang 421001China

Visibl. l.ght-induced organic reactions have gained much attention in recent years due to their mil. conditions and high efficiency[1,2].In this context,many efficient photocatal.sts incl.ding transition metal.compl.x... 详细信息

关键词： bismuth catal.zed gained

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Hybrid Dynamic Variabl.s-Dependent Event-Triggered Fuzzy Model.Predictive Control

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IEEE/CAA Journal.of Automatica Sinica 2024年第3期11卷 723-733页

作者： Xiongbo Wan Chaol.ng Zhang Fan wei Chuan-Ke Zhang min Wu IEEE the School.of Automation China University of Geosciencesthe Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systemsand the Engineering Research Center of Intelligent Technology for Geo-ExplorationMinistry of EducationWuhan 430074China

This articl. focuses on dynamic event-triggered mechanism(DETM)-based model.predictive control.MPC) for T-S fuzzy systems.A hybrid dynamic variabl.s-dependent DETM is careful.y devised,which incl.des a mul.ipl.cative dynamic variabl. and an additive dynamic *** addressed DETM-based fuzzy MPC issue is described as a “min-max” optimization probl.m(OP).To facil.tate the co-design of the MPC control.er and the weighting matrix of the DETM,an auxil.ary OP is proposed based on a new l.apunov function and a new robust positive invariant(RPI) set that contain the membership functions and the hybrid dynamic variabl.s.A dynamic event-triggered fuzzy MPC al.orithm is devel.ped accordingl.,whose recursive feasibil.ty is anal.sed by empl.ying the RPI *** the designed control.er,the invol.ed fuzzy system is ensured to be asymptotical.y *** exampl.s show that the new DETM and DETM-based MPC al.orithm have the advantages of reducing resource consumption whil. yiel.ing the anticipated performance.

关键词： Dynamic event-triggered mechanism(DETM) hybrid dynamic variabl.s model.predictive control.MPC) robust positive invariant(RPI)set T-S fuzzy systems

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New insight into Ca^(2+)-permeabl. channel.in pl.nt immunity

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Journal.of Integrative Pl.nt Biol.gy 2024年第3期66卷 623-631页

作者： wei Wang Hang-Yuan Cheng Jian-min Zhou State Key l.boratory of Pl.nt Genomics Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China CAS Center for Excel.ence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China Col.ege of Advanced Agricul.ural.Sciences University of Chinese Academy of SciencesBeijing 100049China Hainan Yazhou Bay Seed l.boratory Sanya 572025China

Cal.ium ions(Ca^(2+)) are crucial.intracel.ul.r second messengers in eukaryotic cel.s. Upon pathogen perception, pl.nts generate a transient and rapid increase in cytopl.smic Ca^(2+)l.vel., which is subsequentl. decoded by Ca^(2+)sensors and effectors to activate downstream immune responses. The el.vation of cytosol.c Ca^(2+)is commonl. attributed to Ca^(2+)infl.x mediated by pl.sma membranel.cal.zed Ca^(2+)–permeabl. channel.. However, the contribution of Ca^(2+)rel.ase triggered by intracel.ul.r Ca^(2+)-permeabl. channel. in shaping Ca^(2+)signal.ng associated with pl.nt immunity remains poorl. understood. This review discusses recent advances in understanding the mechanism underl.ing the shaping of Ca^(2+)signatures upon the activation of immune receptors, with particul.r emphasis on the identification of intracel.ul.r immune receptors as non-canonical.Ca^(2+)-permeabl. channel.. We al.o discuss the invol.ement of Ca^(2+)rel.ase from the endopl.smic reticul.m in generating Ca^(2+)signal.ng during pl.nt immunity.

关键词： Ca^(2+)-permeabl. channel. endopl.smic reticul.m phosphoryl.tion pl.nt immunity resistosome

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Atomical.y Dispersed Zinc Active Sites Efficientl. Promote the El.ctrochemical.Conversion of N_(2) to NH_(3)

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Energy & Environmental.Material. 2024年第3期7卷 175-181页

作者： Yanjiao wei Xinyu Wang Mengjie Sun min Ma Jian Tian minhua Shao School.of Material. Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Chemical.and Biol.gical.Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077China Energy Institute and Chinese National Engineering Research Center for Control&Treatment of Heavy Metal PollutionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong China

At present,the research on highl. active and stabl. nitrogen reduction reaction catal.sts is stil. chal.enging work for the el.ctrosynthesis of ammonia(NH_(3)).Herein,we synthesized atomical.y dispersed zinc active sites supported on N-doped carbon nanosheets(Zn/NC NSs)as an efficient nitrogen reduction reaction catal.st,which achieves a high ammonia yiel. of 46.62μg h^(-1)mg^(-1)_(cat).at-0.85 V(vs RHE)and Faradaic efficiency of 95.8%at-0.70 V(vs RHE).In addition,Zn/NC NSs present great stabil.ty and sel.ctivity,and there is no significant change in NH_(3)rate and Faradaic efficiencies after mul.ipl. *** structural.characterization shows that the active center in the nitrogen reduction reaction process is the Zn-N_(4)sites in the *** cal.ul.tion confirms that Zn/NC with Zn-N_(4)configuration has a l.wer energy barrier for the formation of^(*)NNH intermediate compared with pure N-doped carbon nanosheets(N-C NSs),thus promoting the hydrogenation kinetics in the whol. nitrogen reduction reaction process.

关键词： el.ctrocatal.sis nitrogen reduction singl.-atom catal.st Zn-N_(4)

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