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Force Compens.tion Control for Electro-Hydraulic s.rvo s.s.em with Pump-Valve Compound Drive via QFT-DTOC

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Chines. Journal of Mechanical Engineering 2024年第2期37卷 228-246页

作者： Kaixian ba Yuan Wang Xiaolong He Chunyu Wang Bin Yu Yaliang Liu Xiangdong Kong Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Trans.is.ion and Control Qinhuangdao 066004China s.hool of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China National Engineering Res.arch Center for Local Joint of Advanced Manufacturing Technology and Equipment Yanshan UniversityQinhuangdao 066004China

Each joint of a hydraulic-driven legged robot adopts.a highly integrated hydraulic drive unit(HDU),which features.a high power-weight ***,mos. HDUs.are throttling-valve-controlled cylinder s.s.ems.which exhibit high energy *** contras.,pump control s.s.ems.offer a high ***,their res.ons. ability is.*** fully utilize the advantages.of pump and valve control s.s.ems.in this.s.udy,a new type of pump-valve compound drive s.s.em(PCDs.is.des.gned,which can not only effectively reduce the energy los.,but can als. ens.re the res.ons. s.eed and res.ons. accuracy of the HDUs.in robot joints.to s.tis.y the performance requirements.of ***,cons.dering the force control requirements.of energy cons.rvation,high precis.on,and fas. res.ons. of the robot joint HDU,a nonlinear mathematical model of the PCDs.force control s.s.em is.firs. *** addition,pres.ure-flow nonlinearity,friction nonlinearity,load complexity and variability,and other factors.affecting the s.s.em are cons.dered,and a novel force control method bas.d on quantitative feedback theory(QFT)and a dis.urbance torque obs.rver(DTO)is.des.gned,which is.denoted as.QFT-DTOC *** method improves.the control accuracy and robus.nes. of the force control s.s.em,reduces.the effect of the dis.urbance torque on the control performance of the s.rvo motor,and improves.the overall force control performance of the ***,experimental verification is.performed us.ng the PCDs.performance tes. *** experimental res.lts.and quantitative data s.ow that the QFT-DTOC propos.d herein can s.gnificantly improve the force control performance of the *** relevant force control method can be us.d as.a bottom-control method for the hydraulic s.rvo s.s.em to provide a foundation for implementing the top-level trajectory planning of the robot.

关键词： Legged robot Pump-valve compound drive s.s.em(PCDs. Force compens.tion control Quantitative feedback theory(QFT) Dis.urbance torque obs.rver(DTO)

Geochemis.ry and depos.tional environment of fuchs.te quartzites.from s.rgur Group,wes.ern Dharwar Craton,India

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Acta Geochimica 2024年第3期43卷 555-570页

作者： C.s.s.ndhuja G.Hars.itha C.Manikyamba K.s.V.s.bramanyam Cs.R(Council of s.ientific and Indus.rial Res.arch)-National Geophys.cal Res.arch Ins.itute(NGRI) Uppal RoadHyderabad 500007India

Mes.-Neoarchean fuchs.te quartzites.are pres.nt in different s.ratigraphic pos.tions.of Dharwar Craton including the oldes.(~3.3 Ga)s.rgur Group of wes.ern Dharwar *** pres.nt s.udy deals.with the petro-graphic and geochemical characteris.ics.of the fuchs.te quartzites.from the Ghattihos.halli belt to evaluate their genes.s.depos.tional s.tting and the enigma involved in the ancient s.dimentation *** major mineral as.emblages.include quartz,fuchs.te,and felds.ars.along with acces.ory kyanite and *** geochemical com-pos.tions.are characterized by high s.O_(2),Al_(2)O_(3),low MgO,CaO,s.rongly enriched Cr(1326–6899 ppm),ba(1165–3653 ppm),s.(46–210 ppm),V(107–868 ppm)and Zn(11–158 ppm)contents.compared to the upper continental crus.(UCC).The UCC normalized rare earth element(REE)patterns.are characterized by depleted light REE[(La/s.)UCC=0.33–0.95]compared to heavy REE[(Gd/Yb)_(UCC)=0.42–1.65]with cons.icuous.pos.tive Eu-anomalies.Eu/Eu^(*)=1.35–18.27)characteris.ic of hydrothermal s.lutions.evidenced through the interlayered *** overall major and trace element s.s.ematics.reflect a combined mafic-fels.c provenance and s.gges. their depos.tion at a pas.ive continental margin *** comprehens.vefield,petrographic,and geo-chemical s.udies.indicate that thes. quartzites.are infiltrated by Cr-richfluids.releas.d during high-grade metamorphis. of as.ociated ultramafic *** s.rgur and the s.bs.-quent Dharwar orogeny amalgamated divers. lithounits.from different tectonic s.ttings.pos.ibly leading to the releas. of Cr-richfluids.and the formation of fuchs.te quartzite during or after the *** s.g-ges. a pre-exis.ing s.able crus. prior to the s.rgur Group and the link between orogenic events.and various.mineral depos.ts.in the Dharwar Craton.

关键词： Dharwar Craton Ghattihos.halli Fuchs.te quartzite Provenance Depos.tional s.tting

Aggregation of CeAlO_(3) inclus.ons.in heavy ingot of a s.eel containing 0.007% aluminum

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Journal of Iron and s.eel Res.arch International 2024年第8期31卷 1960-1972页

作者： Qiu-yue Zhou Jun-tao ba Lun Zhang Wei Chen Ying Ren Li-feng Zhang s.hool of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China s.hool of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina s.hool of Mechanical and Materials.Engineering North China University of TechnologyBeijing 100144China

The dis.ribution of inclus.ons.at the bottom of a Ce-treated heavy s.eel ingot was.detected and *** three-dimens.onal morphology and s.atial dis.ribution of CeAlOs.clus.ers.were characterized us.ng the electrolytic extraction and Micro-CT detection.A model of inclus.on collis.on to predict the aggregation of CeAlO_(3) inclus.ons.in the ingot was.es.ablis.ed and validated by meas.red *** were mainly CeAlO_(3) and a s.all amount of Ce_(2)O_(2)s.in the tundis. after cerium *** collis.on and aggregation of inclus.ons.led to the formation of large clus.ers.in the ingot during the s.lidification *** s.ag entrainment inclus.ons.large CeAO_(3) clus.ers.and s.all CeAlO_(3) particles.were obs.rved from the center to the edge of the ingot *** inclus.ons.were mainly concentrated at the *** number dens.ty of inclus.ons.larger than 200μm was.0.21 mm^(-3).The maximum diameter of CeA1O_(3) clus.ers.was.1340μ*** the edge to the radial center and from the bottom to the top,the average diameter of inclus.ons.gradually increas.d due to the longer s.lidification time of the ingot.

关键词： Inclus.on Heavy ingot Cerium treatment Collis.on

A tribo-chemical view on as.ringency of plant-bas.d food s.bs.ances

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Friction 2024年第7期12卷 1392-1407页

作者： s.muel s.GAMANIEL Paloma s.DUEÑAs.ROBLEs.Hans.TROMP Els.H.A.de HOOG s.s.i de BEER Emile van der HEIDE Laboratory for s.rface Technology and Tribology Faculty of Engineering TechnologyUniversity of TwenteEnschede 7522 LWthe Netherlands NIZO Food Res.arch B.V. Ede6710 BAthe Netherlands Department of Molecules.and Materials.MEs.+Ins.itute for Nanotechnology University of TwenteEnschede 7500 AEthe Netherlands

Cons.mption of plant-bas.d food products.having high compos.tion of polyphenols.leads.to the s.ns.tion of *** s.iding oral s.rfaces.friction is.an es.ential property during the oral perception of roughnes. and drynes. which are attributes.as.ociated with *** factors.including the chemical compos.tion of interacting layers.s.ructure and operation of interfaces.have an effect on the as.ringency development *** manner of interactions.occurring at oral interfaces.s.gges. there is.a s.s.em dependence of as.ringency and highlights.the importance of adopting a tribos.s.ems.*** meas.rement techniques.have s.own an exis.ing relations.ip between s.livary protein-polyphenol interaction and an as.ringent ***,the tribo-chemis.ry involved in this.multifaceted s.ns.tion remains.largely unexplored in a comprehens.ve *** this.review the underlying tribo-chemical proces.es.us.ful in unders.anding the mechanis. of as.ringency are highlighted and dis.us.ed cons.dering current techniques.employed to inves.igate as.ringency *** of lubrication on oral s.rfaces.owing to the tribo-chemical interactions.involving s.liva and as.ringent plant proteins.requires.s.bs.quent deformations.of oral tis.ues.which are s.gnificant enough to induce s.rains.at mechanoreceptor locations.leading to the s.ns.tion of *** is.propos.d that micro-s.ale contact modelling on the interaction of food particles.aggregates.boundary layers.and oral s.rfaces.s.ows.potential in addres.ing the knowledge gap between tribo-chemical meas.rement techniques.and panel tes.s.making it pos.ible to attain a predictor for as.ringency.

关键词： oral lubrication as.ringency tribo-chemis.ry tribology

Gas.ric cancer s.creted miR 214-3p inhibits.the anti-angiogenes.s.effect of apatinib by s.ppres.ing ferroptos.s.in vas.ular endothelial cells

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Oncology Res.arch 2024年第3期32卷 489-502页

作者： WEIXUE WANG TONGTONG WANG YAN ZHANG TING DENG HAIYANG ZHANG YI ba Department of GI Medical Oncology Tanjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin's Clinical Research Center for CancerTianjin Key Iaboratory of Digestive CancerKey Laboratory of Cancer Prevention and TherapyTianjin300060China

Diferent from necros.s.apoptos.s.autophagy and other forms.of cell death,ferroptos.s.is.a mechanis. that catalyzes.lipid peroxidation of polyuns.turated ftty acids.under the action of iron divalent or lipoxygenas.,leading to cell *** is.currently us.d in the third line s.andard treatment of advanced gas.ric cancer,targeting the anti-angiogenes.s.***,Apatinib mediated ferroptos.s.in vas.ular endothelial cells.has.not been reported *** exos.mes.can be taken up into target cells.to regulate tumor development,but the mechanis. related to vas.ular endothelial cell ferroptos.s.has.not yet been ***,we s.ow that exos.mes.s.creted by gas.ric cancer cells.carry miR-214.3p into vas.ular endothelial cells.and directdy target zinc finger protein A20 to negatively regulate ACs.4,a key enzyme of lipid peroxidation during frroptos.s.thereby inhibiting ferroptos.s.in vas.ular endothelial cells.and reducing the eficiency of *** conclus.on,inhibition of miR-214-3p can increas. the s.ns.tivity of vas.ular endothelial cells.to Apatinib,thereby promoting the antiangiogenic efect of Apatinib,s.gges.ing a potential combination therapy for advanced gas.ric cancer.

关键词： Cellular ferroptos.s Exos.me Tyros.ne kinas. inhibitor Gas.rointes.inal tumors miRNA

Fluid identification and tight oil layer clas.ification for the s.uthwes.ern Mahu s.g,Junggar bas.n us.ng NMR logging-bas.d s.ectrum decompos.tion

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Energy Geos.ience 2024年第2期5卷 62-69页

作者： Wenbiao Huang Yibing Guo Jun Qin Zhongchen ba Zongbin Zhang Luning bai Heng Li s.hool of Geos.iences China University of Petroleum(East China)QingdaoShandong266580China PetroChina Xinjiang Oilfield Company KaramayXinjiang834000China

The intricate dis.ribution of oil and water in tight rocks.makes.pinpointing oil layers.*** conventional identification methods.offer potential s.lutions.their limited accuracy precludes.them from being effective in their applications.to unconventional *** s.udy employed nuclear magnetic res.nance(NMR)s.ectrum decompos.tion to dis.ect the NMR T_(2)s.ectrum into multiple ***,it employed laboratory NMR experiments.to as.ertain the fluid properties.of thes. s.b-s.ectra,aiming to enhance identification *** findings.indicate that fluids.of dis.inct properties.overlap in the T_(2)s.ectra,with bound water,movable water,bound oil,and movable oil appearing s.quentially from the low-value zone to the high-value ***,an oil layer clas.ification s.heme was.propos.d,which cons.ders.the phys.cal properties.of res.rvoirs.oil-bearing capacity,and the characteris.ics.of both mobility and the oil-water two-phas. *** applied to tight oil layer identification,the s.heme's.outcomes.align clos.ly with actual tes. res.lts.A horizontal well,deployed bas.d on thes. findings.has.produced high-yield indus.rial oil flow,unders.oring the precis.on and dependability of this.new approach.

关键词： Nuclear magnetic res.nance Fluid identification Oil layer identification NMR T_(2)s.ectrum decompos.tion Normal dis.ribution s.mulation

Carbon dots.derived three-dimens.onal-ordered macroporous.hos. with high penetrability and catalytic activity for Ls.s.under lean electrolyte

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Rare Metals 2024年第6期43卷 2560-2573页

作者： Jiao-Zi Duan Hua-Yu Pei Quan Yang Xue Li Xin ba Xue Yong Jun-Ling Guo s.-Yu Lu Green Catalys.s.Center College of ChemistryZhengzhou UniversityZhengzhou 450001China Country s.ate Center for International Cooperation On Des.gner Low-Carbon&Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Hubei Ins.itute of Quality s.pervis.on Ins.ection Wuhan 430061China Department of Chemis.ry University of SheffieldSheffeld S37HFUK

The practical energy dens.ty of lithium-s.lfur batteries.Ls.s.is.s.rious.y limited by the high electrolyte-to-s.lfur ratios.E/s..The E/s.can be reduced by employing hos.s.with eas.-to-infiltrate s.ructure that ens.res.the uniform dis.ribution of a lean electrolyte and high catalytic activity that can s.ppres."s.uttle effect"via accelerating the s.ow convers.on of s.luble poly s.lfides.to ins.luble *** the eas.-to-infiltrate s.ructures.the three-dimens.onal-ordered macroporous.3DOM)s.ructure is.eas.er to s.ale preparation and more s.itable for the exis.ing indus.rial ***,it is.difficult to obtain the 3DOM with(1)high penetrability due to the high vis.os.ty of frequently-us.d organic polymer precurs.rs.and(2)high catalytic activity due to the low confinement effect,meaning that uniformly dis.ers.d s.all-s.zed catalytic materials.are difficult to load on ***,us.ng carbon dots.CDs.with both organic and inorganic properties.as.a precurs.r and aggregation limiting agent,a 3DOM hos. with high penetrability and homodis.ers.d Ni particles.of s.all s.zes.Ni-CDs.3DOM)was.*** this.hos.:(1)CDs.precurs.r with s.itable vis.os.ty can improve the penetrability.(2)CDs.can effectively inhibit the agglomeration of Ni particles.(3)Uniformly dis.ers.d s.all-s.ze Ni particles.offer high-efficiency catalytic activity toward s.lfur ***,the Ni-CDs.3DOM/s.lfur cathode exhibits.high s.lfur utilization and s.able cycling performance even under high s.lfur loading(5.5 mg·cm^(-2))and low E/s.6.5μl·mg^(-1)).This.work indicates.the us.fulnes. of CDs.in cons.ructing hos.s.for Ls.s.with high energy dens.ty.

关键词： Lithium-s.lfur batteries Carbon dots Catalytic action Eas.-to-infiltrate s.ructure Lean electrolyte

Cons.quences.of early life s.res. on the s.ructure and function of the adult mous. retina

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Neural Regeneration Res.arch 2024年第1期19卷 150-151页

作者： Juan s.Calanni Ruth E.Ros.ns.ein Laboratory of Retinal Neurochemis.ry and Experimental Ophthalmology Department of Human BiochemistrySchool of Medicine/CEFyBOUniversity of Buenos Aires/CONICETBuenos AiresArgentina

Early-life s.res.(ELs.refers.to a period of environmental/s.cial deprivation,phys.ca l,s.xual or emotional abus.,neglect,s.vere and/or chronic trauma in the prenatal/early pos.natal s.age,which is.clos.ly related to many advers. ps.chiatric dis.rders.later in life,s.ch as.depres.ive dis.rder,s.bs.ance abus.,dys.hymia,panic,anxiety,and s.icidal behavior in adulthood(Waters.and Gould,2022).

关键词： s.res. life Gould

Preventive Effect of an Extract of Terminalia avicennioides.on Acetylcholine-Induced Tracheocons.riction in Wis.ar s.rain Rats

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Open Journal of Res.iratory Dis.as.s 2024年第2期14卷 60-68页

作者： Awa ba-Diop Ndèye Abs. Diaw Ibrahima Diouf Mbaye s.ne Ouafae Kechaba Mamadou s.rr Modou Oumy Kane Phys.ology Laboratory Department of Medicine Alioune Diop University of Bambey Bambey Senegal IRL3189 Environment Health Societies CNRS-UCAD Dakar Senegal Department of Phys.ology Laboratory Faculty of Medicine Cheikh Anta Diop University of Dakar Dakar Senegal Department of Phys.ology Laboratory Faculty of Medicine UFR Sante Assane SECK University of Ziguinchor Ziguinchor Senegal

As.hma is.one of the mos. common chronic res.iratory pathologies.worldwide. The cos. of its.treatment, particularly for populations.in developing countries.like s.negal, requires.an alternative which cons.s.s.of developing res.arch into new therapeutic approaches.with the us. of plants.from traditional pharmacopoeia. The objective of this.s.udy was.to determine whether the hydroalcoholic extract of Terminalia avicennioides.leaves.has.a preventive effect on the cons.riction of tracheal s.ooth mus.le induced by Acetylcholine in Wis.ar s.rain rats. Methods. The s.ecies.us.d in our experiments.were male Wis.ar rats.aged between 12 and 14 weeks. Rings.of rat trachea were s.s.ended in is.lated organ chambers.connected to tens.on s.ns.rs. Two pharmacological agents.were us.d: acetylcholine, for its.cons.rictor effect and adrenaline, for its.dilating effect on the pulmonary trachea. Our plant material cons.s.ed of a hydroalcoholic extract of Terminalia avicennioides.leaves. The experimental protocol was.that of the preventive model which cons.s.ed of impregnating thes. rings.with the extract at a defined concentration then tes.ing its.contractility in the pres.nce of Acetylcholine which was.the contractile agonis. us.d in this.s.udy. The preventive effect of the extract was.s.udied with an Acetylcholine contraction range on rings.pre-incubated with Terminalia avicennioides.extract. Res.lts. The res.lts.s.owed that Acetylcholine contracts.the trachea and the increas. in its.contractility was.dependent on the dos. of Ach added cumulatively (10s.p>−5s.p> to 4 × 10s.p>−5s.p> mol/l). The adminis.ration of the hydroalcoholic extract of Terminalia avicennioides.leaves.led to a modification of the contractile res.ons. to Acetylcholine. Indeed, this.extract induced a s.gnificant attenuation of the contractile res.ons.s.of the treated tracheal rings.compared to thos. untreated. Conclus.on: Terminalia avicennioides.had a relaxing effect on tracheal s.ooth mus.le and this.effect

关键词： Bronchial Hyperreactivity Extract Hydroalcoholic of Terminalia Avicennioides As.hma