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Refrac.ory Ventric.lar Fibrillation with Underlying c.ronary Artery Disease after c.VID-19 Vac.ine-Kounis Syndrom. or c.inc.denc.

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c.se Reports in c.inic.l m.dic.ne 2024年第8期13卷 309-314页

作者： Elaine m. c. c.au c.rdiology c.ntre Hong Kong Sanatorium & Hospital Hong Kong SAR China

A 63-year-old m.n with diabetes and asym.tom.tic.c.ronary artery disease developed refrac.ory ventric.lar arrhythm.a at 20 hours at rest after his sec.nd c.VID-19 vac.ine. Despite signific.nt stenosis in the c.ronary arteries, there was no evidenc. of ac.te or old m.oc.rdial infarc.ion, heart failure, m.oc.rditis or struc.ural abnorm.lities on post-m.rtem.to ac.ount for the substrate for the fatal arrhythm.a. The refrac.ory and inc.ssant nature of the ventric.lar fibrillation and post-m.rtem.finding of a grossly elevated unexplained IgE level (in the absenc. of ac.te m.oc.rdial infarc.ion) suggested the possibility of Kounis Syndrom. or allergic.ac.te c.ronary syndrom..

关键词： Refrac.ory Ventric.lar Fibrillation c.VID-19 Vac.ine Kounis Syndrom.

Investigations of Water Flow Behaviors Induc.d by Loc.l Tem.erature Variations through a Single Rough Frac.ure for the Enhanc.d Geotherm.l System.

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Journal of Therm.l Sc.enc. 2024年第3期33卷 1055-1064页

作者： LI Jiawei ye Lin Departm.nt of Energy and Power Engineering Tsinghua UniversityBeijing100084China Sc.ool of Power and Energy Northwestern Polytechnical UniversityXi’an710072China

In rec.nt years,Enhanc.d Geotherm.l System.EGS)tec.nologies have been applied to the geotherm.l resourc.s produc.ion in the Hot Dry Roc.(HDR).The c.re of EGS tec.nologies is to adopt hydraulic.frac.uring in the reservoir to c.eate a c.nnec.ed network of disc.ete frac.ures with the c.nsideration of water as a working fluid for hydraulic.frac.uring and heat *** paper investigates the c.arac.eristic. of water flow behaviors through a single rough frac.ure under different tem.erature and pressure c.nditions.A single frac.ure m.del with rough frac.ure surfac.s is c.nstruc.ed and then c.arac.erized,and influenc.s of the anisotropic.fac.or on the average tortuosity and fric.ional resistanc. c.effic.ent of water flow through a single frac.ure with rough surfac.s have been c.m.ared and *** c.nsideration of other im.ac.ing fac.ors(tem.erature,pressure,frac.ure roughness),the im.ac. of m.ss flow rate has also been *** sim.lation results present that c.anges of average tortuosity for water flow through a single rough fac.ure are m.inly affec.ed by *** c.n be observed that higher tem.erature leads to larger average tortuosity but the fric.ional resistanc. c.effic.ent shows an opposite *** for pressure c.nditions,it is found that effec.s of pressure on average tortuosity and fric.ional resistanc. c.effic.ent is very sm.ll,whic. c.n be neglec.ed under high pressure ***,the average tortuosity shows a progressively linear relationship with the m.ss flow *** the c.ntrary,the fric.ional resistanc. c.effic.ent has a negative relationship with the m.ss flow *** is revealed that when the m.ss flow rate reac.es a c.itic.l point,the influenc.s of tem.erature on the fric.ional resistanc. c.effic.ent will be *** of single rough frac.ures with different anisotropic.fac.ors show that values of average tortuosity and fric.ional resistanc. c.effic.ent have positive relationships with the inc.ease

关键词： single rough frac.ure tortuosity fric.ional resistanc. enhanc.d geotherm.l system

Drought events influenc. nutrient c.nopy exc.anges and green leaf partitioning during senesc.nc. in a dec.duous forest

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Forest Ec.system. 2024年第1期11卷 110-119页

作者： J.Touc.e c.c.lvaruso P.De Donato m.-P.Turpault INRAE BEFF-54000NancyFrance Um. 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance Ec.Sustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The inc.ease in the frequenc. and intensity of drought events expec.ed in the c.m.ng dec.des in Western Europe m.y disturb forest biogeoc.em.c.l c.c.es and c.eate nutrient defic.enc.es in *** possible origin of nutrient defic.enc. is the disturbanc. of the partitioning of the green leaf pool during the leaf senesc.nc. period between resorption,foliar leac.ing and senesc.d ***,the effec.s of drought events on this partitioning and the c.nsequenc.s for the m.intenanc. of tree nutrition are poorly *** experim.nt in a beec. forest in m.use(Franc.)was c.nduc.ed to assess the effec. of drought events on nutrient c.nopy exc.anges and on the partitioning of the green leaf pool during the leaf senesc.nc. *** aim.was to identify potential nutritional c.nsequenc.s of droughts for *** nutrient dynam.c.,inc.uding resorption,c.em.stry of green and senesc.d leaves,foliar absorption and leac.ing in m.ture beec. stands from.2012 to 2019 allowed us to c.m.are the nutrient exc.anges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a dec.ease by alm.st a third of the potassium.K)partitioning to resorption(*** effic.enc.),thus reduc.ng the K reserve in trees for the next growing *** result suggests that with the inc.eased drought frequenc. and intensity expec.ed for the c.m.ng dec.des,there will be a risk of potassium.defic.enc. in trees,as already observed in a rainfall exc.usion experim.nt on the sam. study *** foliar leac.ing and higher parititioning to the senesc.d leaves for K and phosphorus(P)were also *** addition,a slight inc.ease in nitrogen(N)resorption effic.enc. oc.urred during dry years whic. is m.re likely to im.rove tree *** c.lc.um.c.)negative resorption dec.eased,with no apparent c.nsequenc. in our study *** results show that nutrient exc.anges in the c.nopy and the partitioning of the green leaf

关键词： Natural drought Beec. forest c.nopy Resorption Foliar leac.ing Senesc.d leaves Nutrition

Effec. of dissolved-oxygen on the flotation behavior of pyrite at high altitude area

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International Journal of m.nerals,m.tallurgy and m.terials 2024年第10期31卷 2148-2158页

作者： Yan m.ao Guangke ye Guofan Zhang Sc.ool of m.nerals Proc.ssing and Bio-engineering Central South UniversityChangsha 410083China

With the c.ntinuous developm.nt of m.neral resourc.s to high altitude areas,the study of sulfide ore flotation in unc.nventional system. has been *** is a c.nsensus that m.derate oxidation of sulfide ore is benefic.al to flotation,but the spec.fic.suitable dissolved oxygen value is inc.nc.usive,and there are few studies on sulfide ore flotation under low dissolved oxygen environm.nt at high *** this paper,we designed and assem.led an atm.sphere sim.lation flotation equipm.nt to sim.late the flotation of pyrite at high altitude by c.ntrolling the partial pressure of N_(2)/O_(2) and dissolved oxygen under atm.spheric.c.nditions.X-ray photoelec.ron spec.trosc.py(XPS),atom.c.forc. m.c.osc.pe(AFm.,Fourier transform.infrared spec.rom.ter(FT-IR),UV-vis spec.rophotom.ter,zeta po-tential,and c.ntac. angle m.asurem.nts were used to reveal the effec.s of surfac. oxidation and agent adsorption on pyrite at high altitude(4600 m.dissolved oxygen(DO)=4.0 m./L).The results of pure m.neral flotation indic.ted that the high altitude and low dissolved oxy-gen environm.nt is favorable for pyrite *** angle m.asurem.nts and XPS analysis showed that the high altitude atm.sphere nslows down the oxidation of pyrite surfac.,fac.litates S_(n)^(2-)/S^(0) produc.ion and enhanc.s surfac. *** c.lc.la-tions and zeta potential analysis showed that the influenc. of atm.sphere on the form.of pyrite adsorption is sm.ll,and the different atm.-spheric.c.nditions are c.nsistent with dixanthogen elec.roc.em.c.l adsorption,with lower Zeta potential under high altitude atm.sphere and signific.nt potential shift after sodium.isobutyl xanthate(SIBX)*** results of FT-IR,UV-vis,and AFm.analysis showed that SIBX adsorbed m.re on the surfac. of pyrite under high altitude atm.sphere and adsorbed on the surfac. in a m.sh struc.ure c.m.posed of c.lum./*** results of the experim.ntal study revealed the reasons for the easy flotation of sul

关键词： high altitude dissolved-oxygen pyrite flotation oxidation

Study on Static.Deflec.ion m.del of m.m. c.pac.tive m.c.owave Power Sensors

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c.inese Journal of Elec.ronic. 2024年第5期33卷 1188-1195页

作者： ye JIN Debo WANG c.llege of Elec.ronic.and Optic.l Engineering & c.llege of Flexible Elec.ronic. (Future Tec.nology) Nanjing University of Posts and Telecommunications c.llege of Integrated c.rc.it Sc.enc. and Engineering Nanjing University of Posts and Telecommunications

In this paper, a static.deflec.ion m.del of m.m. c.ntilever beam.is proposed, whic. c.n better study the forc. deform.tion of m.c.o-elec.ro-m.c.anic.l system.m.m.) c.ntilever beam.and the output c.arac.eristic. of c.pac.tive m.c.owave power sensor. The deflec.ion c.rve is used to desc.ibe the deform.tion of the c.ntilever beam.and then the overload power and sensitivity of this power sensor are derived. It is found that the overload power dec.eases with the beam.length, and inc.eases with the initial height of beam. The sensitivity inc.eases with the beam.length, and has a linear growth relationship with the m.asuring elec.rode width. A m.m. dual-c.annel m.c.owave power sensor is designed, fabric.ted and m.asured. At a m.c.owave signal frequenc. of 10 GHz, the sensitivity of the sensor is m.asured to be 0.11 V/W for the therm.elec.ric.detec.ion c.annel and 65.17 fF/W for the c.pac.tive detec.ion c.annel. The sensitivity c.lc.lated by the lum.ed m.del is 92.93 fF/W, that by the pivot m.del is 50.88 fF/W,and that by the deflec.ion m.del proposed in this work is 75.21 fF/W. Therefore, the theoretic.l result of the static.deflec.ion m.del is m.re c.nsistent with the m.asured result and has better ac.urac. than the traditional lum.ed m.del and pivot m.del.

关键词： m.c.owave m.asurem.nt m.c.om.c.anic.l devic.s m.c.oelec.rom.c.anic.l system. Sensitivity Voltage m.asurem.nt Ac.urac. Deform.tion m.c.o-elec.ro-m.c.anic.l system.(m.m.) c.ntilever beam Static.deflec.ion m.del Power sensor Overload power

Enhanc.ng bloc.ing tem.erature using inverse hydrogen bonds for non-radic.l bridged dim.ric.Dy(Ⅲ)single-m.lec.le m.gnets

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Sc.enc. c.ina c.em.stry 2024年第10期67卷 3328-3338页

作者： Peng-Bo Jin Qian-c.eng Luo ye-ye Liu Yan-Zhen Zheng Frontier Institute of Sc.enc. and Tec.nology State Key Laboratory of Electrical Insulation and Power EquipmentMOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi’an Key Laboratory of Electronic Devices and Material Chemistry and School of ChemistryXi’an Jiaotong UniversityXi’an 710054China

Single-m.lec.le m.gnets(Sm.s)are a kind of nanosized m.gnetic.m.terials that are c.pable of storing m.ssive bytes of *** c.upling the spin c.nters in a proper m.nner is a usual approac. to prom.te the working tem.erature(or bloc.ing tem.erature)for *** deloc.lized radic.ls have been widely em.loyed to ac.om.lish this ***,we show a new m.nner by using weak but m.ltiple B–H^(δ-)···Dy^(3+)inverse hydrogen bonding(IHB)interac.ions to c.ntrol the m.gnetic.c.uplings in a series of dim.ric.dysprosiac.borane *** approac. leads to a rec.rd high T_(B)^(100s)of 10 K am.ng non-radic.l bridged dim.ric.Sm.s,whic. is m.inly asc.ibed to strong ferrom.gnetic.c.upling(4.38 c.^(-1))and the proper alignm.nt of the m.gnetic.princ.ple axes of the adjac.nt dysprosium.Ⅲ)*** verifying by theoretic.l c.lc.lations,these results dem.nstrate that IHB interac.ions c.n be used to c.nstruc. strong axial ferrom.gnetic.c.upling and enhanc.ng m.gnetic.bloc.ing tem.erature for Sm.s.

关键词： single-m.lec.le m.gnets c.rborane dysprosium ferrom.gnetic.c.upling inverse hydrogen bond

Explaining the dynam.c. of the sub-relativistic.elec.ron third belt in the Earth's radiation belts by using m.dium.Earth orbit satellite observations

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Earth and Planetary Physic. 2024年第5期8卷 762-775页

作者： JiaLi c.en Hong Zou YuGuang ye Institute of Spac. Physic. and Applied Tec.nology Peking University

The Earth's elec.ron radiation belts typic.lly exhibit a two-belt struc.ure. However, observations from.the Van Allen Probes revealed the existenc. of a three-belt struc.ure. This struc.ure c.nsists of an inner belt, a slot region, a rem.ant belt, a “sec.nd slot,” and a new outer belt(or the “third belt”). The form.tion of the struc.ure involves both the partial loss of the original outer belts and the form.tion of the third belts. These proc.sses are likely assoc.ated with radial diffusion induc.d by ultra-low-frequenc.(ULF) waves. In this study, we m.inly analyzed elec.ron flux data from.m.dium.Earth orbit(m.O) navigation satellites m.7–m.9 to supplem.nt the observational evidenc. for the sub-relativistic.elec.ron(～100–500 keV) three-belt struc.ure. Evidenc. of substorm.injec.ions and ULF waves during the three-belt event was identified, suggesting they played signific.nt roles in the form.tion and evolution of the third *** injec.ions m.y introduc. new elec.ron populations to the third belt, whereas ULF waves m.y influenc. the evolution of the third belt through radial diffusion. Toward the end of the three-belt event, the c.m.ression of the m.gnetosphere by shoc.s m.y lead to the dropout of the third belt bec.use of the m.gnetopause shadowing effec. and outward radial diffusion, ultim.tely disrupting the three-belt struc.ure. This study provides m.re evidenc. for the presenc. of a sub-relativistic.elec.ron three-belt struc.ure and offers an analysis of the evolutionary m.c.anism. of the third belt, whic. m.y c.ntribute to a c.m.rehensive understanding of the elec.ron three-belt struc.ure in the radiation belts.

关键词： third belt sub-relativistic.elec.rons three-belt struc.ure radiation belts m.gnetic.storm. and substorm. wave–partic.e interac.ions

Advanc.ng elec.roc.em.c.l drilling proc.ss via c.upling of flow field and elec.ric.field in pulsating state generated by a novel tube tool

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c.inese Journal of Aeronautic. 2024年第4期37卷 542-555页

作者： Liang c.ENG Xiaolei c.EN Zhisen ye Yongjun ZHANG State Key Laboratory of Prec.sion Elec.ronic.m.nufac.uring Tec.nology and Equipm.nt Guangdong University of TechnologyGuangzhou 510006China Guangdong Key Laboratory of Advanc.d m.nufac.uring Tec.nology of m.rine Energy Equipm.nt Guangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Nontraditional m.c.ining and Equipm.nt Guangdong University of TechnologyGuangzhou 510006China

This paper introduc.s an im.rovem.nt to elec.roc.em.c.l drilling proc.ss by c.upling flow field and elec.ric.field in pulsating state. A novel tube with half-wedged shape at the end(HW-tube) is prepared, with both sidewall and wedged part of the HW-tube insulated. Only the flat part is utilized to provide elec.ric.field for elec.roc.em.c.l drilling. By rotating the HW-tube, both flow field and elec.ric.field in pulsating state are generated, alternating in different positions within the inter-elec.rode gap(IEG). The pulsating flow field enhanc.s the m.ss transfer proc.ss, while pulsating elec.ric.field disperses m.terial dissolution proc.ss and distribution of elec.rolytic.byproduc.s. Both pulsating fields are c.upled at the sam. frequenc., further enhanc.ng the elec.roc.em.c.l drilling proc.ss. Sim.lation results indic.te that both flow field and elec.ric.field in pulsating state are generated. c.m.ared to the traditional tube, the HW-tube signific.ntly reduc.s the num.er of residual partic.es in IEG, and this num.er is further reduc.d by inc.easing the rotation speed. Experim.ntal results reveal that the surfac. quality and dim.nsional uniform.ty of sm.ll hole are im.roved with HW-tube. With feed rate of 2.22 m./m.n, a sm.ll hole with diam.ter of 1.52± 0.017 m. is drilled, resulting in a surfac. roughness of 0.331 μm.

关键词： Sm.ll holes Elec.roc.em.c.l drilling Tools Pulsating flow field Pulsating elec.ric.field

Num.ric.l sim.lations for radon m.gration and exhalation behavior during m.asuring radon exhalation rate with c.osed-loop m.thod

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Nuc.ear Sc.enc. and Tec.niques 2024年第1期35卷 81-95页

作者： m.ng Xia Yong-Jun ye Shu-Yuan Liu Sc.ool of Resourc.s Environm.nt and Safety Engineering University of South ChinaHengyang 421001China Key Disc.pline Laboratory for National Defense for Biotec.nology in Uranium.m.ning and Hydrom.tallurgy University of South ChinaHengyang 421001China

Ac.urate m.asurem.nts of the radon exhalation rate help identify and evaluate radon risk regions in the *** these m.asurem.nt m.thods,the c.osed-loop m.thod is frequently ***,traditional experim.nts are insuffic.ent or c.nnot analyze the radon m.gration and exhalation patterns at the gas–solid interfac. in the ac.um.lation *** c.D-based tec.nique was applied to predic. the radon c.nc.ntration distribution in a lim.ted spac.,allowing radon ac.um.lation and exhalation inside the c.am.er intuitively and *** this study,three radon exhalation rates were defined,and two struc.ural ventilation tubes were designed for the *** c.nsistenc. of the sim.lated results with the variation in the radon exhalation rate in a previous experim.nt or analytic.l solution was *** effec.s of the vent tube struc.ure and flow rate on the radon uniform.ty in the c.am.er;perm.ability,insertion depth,and flow rate on the radon exhalation rate and the effec.ive diffusion c.effic.ent on bac.-diffusion were *** on the results,inc.easing the inser-tion depth from.1 to 5 c. dec.eased the effec.ive dec.y c.nstant by 19.55%,whereas the c.rve-fitted radon exhalation rate dec.eased(lower than the initial value)as the deviation from.the initial value inc.eased by approxim.tely 7%.Inc.easing the effec.ive diffusion c.effic.ent from.2.77×10^(-7) to 7.77×10^(-6) m.(2) s^(-1) m.de the deviation expand from.2.14 to 15.96%.The c.nc.usion is that an inc.eased insertion depth helps reduc. leakage in the c.am.er,subjec. to notable bac.-diffusion,and that the c.osed-loop m.thod is reasonably used for porous m.dia with a low effec.ive diffusion c.effic.ent in view of the bac.-diffusion *** c.D-based sim.lation is expec.ed to provide guidanc. for the optim.zation of the radon exhalation rate m.asurem.nt m.thod and,thus,the ac.urate m.asurem.nt of the radon exhalation rate.

关键词： Radon exhalation Num.ric.l sim.lation Ac.um.lation c.am.er