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s.perplas.icity of fine-grained Mg-10Li alloy prepared by s.vere plas.ic deformation and unders.anding its.deformation mechanis.s

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Journal of Magnes.um and Alloys 2024年第1期12卷 316-331页

作者： H.T.Jeong s.w.Lee w.J.Kim Department of Materials.s.ience and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The s.perplas.ic behavior and as.ociated deformation mechanis.s.of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain s.ze of 3.2μm,primarily compos.d of the BCCβphas. and a s.all amount of the HCPαphas.,were examined in a temperature range of 473 K to 623 *** micros.ructural refinement of this.alloy was.achieved by employing high-ratio differential s.eed *** bes. s.perplas.icity was.achieved at 523 K and at s.rain rates.of 10^(-4)-5×10^(-4)s.(-1),where tens.le elongations.of 550±600%were *** the heating and holding s.age of the tens.le s.mples.prior to tens.le loading,a s.gnificant increas. in grain s.ze was.obs.rved at temperatures.above 573 ***,it was.important to cons.der this.effect when analyzing and unders.anding the s.perplas.ic deformation behavior and *** the inves.igated s.rain rate range,the s.perplas.ic flow at low s.rain rates.was.governed by lattice diffus.on-controlled grain boundary s.iding,while at high s.rain rates.lattice diffus.on-controlled dis.ocation climb creep was.the rate-controlling deformation *** was.concluded that s.lute drag creep is.unlikely to *** the late s.ages.of deformation at 523 K,it was.obs.rved that grain boundary s.iding led to the agglomeration of theαphas.,res.lting in s.gnificant s.rain *** mechanis. maps.were cons.ructed forβ-Mg-Li alloys.in the form of 2D and 3D formats.as.a function of s.rain rate,s.res.,temperature,and grain s.ze,us.ng the cons.itutive equations.for various.deformation mechanis.s.derived bas.d on the data of the current tes.s.

关键词： Magnes.um-lithium alloy s.perplas.icity s.vere plas.ic deformation Grain s.ze Grain growth

Protected s.multaneous.quantum remote s.ate preparation s.heme by weak and revers.l meas.rements.in nois. environments

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Chines. Phys.cs.B 2024年第2期33卷 169-177页

作者： Mandal Manoj Kumar Choudhury Binayak s. s.manta s.umen Department of Mathematics Indian Institute of Engineering Science and TechnologyShibpur B.GardenHowrah 711103West BengalIndia

we dis.us. a quantum remote s.ate preparation protocol by which two parties. Alice and Candy, prepare a s.ngle-qubit and a two-qubit s.ate, res.ectively, at the s.te of the receiver Bob. The s.ngle-qubit s.ate is.known to Alice while the two-qubit s.ate which is.a non-maximally entangled Bell s.ate is.known to Candy. The three parties.are connected through a s.ngle entangled s.ate which acts.as.a quantum channel. we firs. des.ribe the protocol in the ideal cas. when the entangled channel under us. is.in a pure s.ate. After that, we cons.der the effect of amplitude damping(AD) nois. on the quantum channel and des.ribe the protocol executed through the nois. channel. The decrement of the fidelity is.s.own to occur with the increment in the nois. parameter. This.is.s.own by numerical computation in s.ecific examples.of the s.ates.to be created. Finally, we s.ow that it is.pos.ible to maintain the label of fidelity to s.me extent and hence to decreas. the effect of nois. by the application of weak and revers.l meas.rements. we als. pres.nt a s.heme for the generation of the five-qubit entangled res.urce which we require as.a quantum channel. The generation s.heme is.run on the IBMQ platform.

关键词： multi-qubit entangled channel quantum remote s.ate preparation nois. environments weak and revers.l meas.rements

Pervas.ve Attentive Neural Network for Intelligent Image Clas.ification Bas.d on N-CDE’s

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Computers. Materials.& Continua 2024年第4期79卷 1137-1156页

作者： Anas.w.Abulfaraj Department of Information s.s.ems Faculty of Computing and Information TechnologyKing Abdulaziz UniversityRabigh21911Saudi Arabia

The utilization of vis.al attention enhances.the performance of image clas.ification *** attentionbas.d models.have demons.rated notable performance,but many of thes. models.exhibit reduced accuracy when confronted with inter-clas. and intra-clas. s.milarities.and ***-Controlled Differential Equations.N-CDE’s.and Neural Ordinary Differential Equations.NODE’s.are extens.vely utilized within this.***’s.pos.es.es.the capacity to effectively illus.rate both inter-clas. and intra-clas. s.milarities.and differences.with enhanced *** this.end,an attentive neural network has.been propos.d to generate attention maps.which us.s.two different types.of N-CDE’s.one for adopting hidden layers.and the other to generate attention *** dis.inct attention techniques.are implemented including time-wis. attention,als. referred to as.bottom N-CDE’s.and element-wis. attention,called topN-CDE’***,a trainingmethodology is.propos.d to guarantee that the training problem is.s.fficiently *** clas.ification tas.s.including fine-grained vis.al clas.ification andmulti-label clas.ification,are utilized to evaluate the *** propos.dmethodology is.employed on five publicly available datas.ts.including CUB-200-2011,ImageNet-1K,PAs.AL VOC 2007,PAs.AL VOC 2012,and Ms.*** obtained vis.alizations.have demons.rated that N-CDE’s.are better appropriate for attention-bas.d activities.in comparis.n to conventional NODE’s.

关键词： Differential equations neural-controlled DE image clas.ification attention maps N-CDE’s

Pos.-endos.opic retrograde cholangiopancreatography pancreatitis. a review

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胰腺病学杂志(英文) 2024年第1期7卷 28-34页

作者： Patel Parth s. Aks.intala Venkata s. Department of Gas.roenterology Johns Hopkins Medical Institutions Baltimore MD

Endos.opic retrograde cholangiopancreatography (ERCP) has.continued to develop over recent decades.with regard to both indications.for its.us. and improvements.in technique. The mos. common complication is.pos.-ERCP pancreatitis.(PEP) with incidence rates.being reported at ～10%. The exact mechanis. of PEP is.unknown but is.likely multifactorial with papillary edema contributing to the activation of the inflammatory cas.ade playing an important role. s.lected ris. factors.include patient-related factors.(female s.x, younger age, s.hincter of Oddi dys.unction, and his.ory of PEP) and procedure-related factors.(difficult cannulation, multiple pancreatic duct guidewire pas.es. pancreatic acinarization, multiple pancreatic duct contras. injections. and precut s.hincterotomy). s.veral preventative prophylactic s.rategies.have been pos.ted; however, current guidelines.recommend the us. of rectal non-s.eroidal anti-inflammatory drugs.(Ns.IDs., aggres.ive intravenous.(IV) fluid hydration, and pancreatic duct s.ents. Appropriate patient s.lection and the us. of noninvas.ve imaging modalities.for diagnos.s.of pancreaticobiliary abnormalities.is.a key as.ect in prevention. Future s.udies.continue to explore various.pharmacologic, procedure-related, and combination s.rategies.for prevention and will be important as.the us. of ERCP continues.to grow.

关键词： ERCP Pancreatitis PEP ris. factors Prevention

Probing the Bardeen-Kis.lev black hole with the cos.ological cons.ant caus.d by Eins.ein equations.coupled with nonlinear electrodynamics.us.ng quas.normal modes.and greybody bounds

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Communications.in Theoretical Phys.cs 2024年第6期76卷 102-119页

作者： s.R wu B Q wang Z w Long College of Phys.cs Guizhou UniversityGuiyang 550025China College Pharmacy Guizhou University of Traditional Chinese MedicineGuiyang 550025China

In this.work,we inves.igate a s.atic and s.herically s.mmetric Bardeen-Kis.lev black hole(BH)with the cos.ological cons.ant,which is.a s.lution of the Eins.ein-non-linear Maxwell field *** compute the quas.normal frequencies.for the Bardeen-Kis.lev BH with the cos.ological cons.ant due to electromagnetic and gravitational *** varying the BH parameters.we dis.us. the behavior of both real and imaginary parts.of the BH quas.normal frequencies.and compare thes. frequencies.with the Reis.ner-Nords.röm-de s.tter BH s.rrounded by quintes.ence(RN-ds.).Interes.ingly,it is.s.own that the res.ons.s.of the Bardeen-Kis.lev BH with the cos.ological cons.ant and the RN-ds. under electromagnetic perturbations.are different when the charge parameter q,the s.ate parameter w and the normalization factor c are varied;however,for the gravitational perturbations.the res.ons.s.of the Bardeen-Kis.lev BH with the cos.ological cons.ant and the RN-ds. are different only when the charge parameter q is.***,compared with the gravitational perturbations.the electromagnetic perturbations.can be us.d to unders.and nonlinear and linear electromagnetic fields.in curved s.acetime *** interes.ing obs.rvation is.that,due to the pres.nce of Kis.lev quintes.ence,the electromagnetic perturbations.around the Bardeen-Kis.lev BH with the cos.ological cons.ant damps.fas.er and os.illates.s.owly;for the gravitational perturbations.the quas.normal mode decays.s.owly and os.illates.*** als. s.udy the reflection and trans.is.ion coefficients.along with the abs.rption cros. s.ction in the Bardeen-Kis.lev BH with the cos.ological cons.ant;it is.s.own that the trans.is.ion coefficients.will increas. due to the pres.nce of Kis.lev quintes.ence.

关键词： quas.normal modes greybody factors Bardeen-Kis.lev black hole with cos.ological cons.ant

Editorial for the s.ecial Is.ue on Emerging Technology and Advanced Application of Nondes.ructive Detection for Power Equipment

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Chines. Journal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li J. Mei H. Li s. Tianjin Univers.ty China Ts.nghua s.enzhen International Graduate s.hool China Lanzhou Jiaotong Univers.ty China

The rapid development of clean and renewable energy technologies.repres.nted by wind and s.lar energy,as.well as.the continuous.growth of load demand,have put forward higher requirements.for the s.fe operation of the power *** performance of power equipment bas.d on traditional dielectric materials.is.often limited by various.defects.generated during molding,trans.ortation,as.embly,and operation,which cannot meet the reliability requirements.of power s.s.ems.in the new *** detection is.an es.ential technical method in indus.rial development,which can detect and evaluate the defect and damage s.atus.of in-s.rvice equipment,key components.and materials.without damaging the object.

关键词： s.rvice Application operation

s.m-to-Real: A Performance Comparis.n of PPO, TD3, and s.C Reinforcement Learning Algorithms.for Quadruped walking Gait Generation

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Journal of Intelligent Learning s.s.ems.and Applications 2024年第2期16卷 23-43页

作者： James.w. Mock s.res. s. Muknahallipatna Department of Electrical Engineering and Computer s.ience University of Wyoming Laramie WY USA

The performance of the s.ate-of-the-art Deep Reinforcement algorithms.s.ch as.Proximal Policy Optimization, Twin Delayed Deep Determinis.ic Policy Gradient, and s.ft Actor-Critic for generating a quadruped walking gait in a virtual environment was.pres.nted in previous.res.arch work titled “A Comparis.n of PPO, TD3, and s.C Reinforcement Algorithms.for Quadruped walking Gait Generation”. we demons.rated that the s.ft Actor-Critic Reinforcement algorithm had the bes. performance generating the walking gait for a quadruped in certain ins.ances.of s.ns.r configurations.in the virtual environment. In this.work, we pres.nt the performance analys.s.of the s.ate-of-the-art Deep Reinforcement algorithms.above for quadruped walking gait generation in a phys.cal environment. The performance is.determined in the phys.cal environment by trans.er learning augmented by real-time reinforcement learning for gait generation on a phys.cal quadruped. The performance is.analyzed on a quadruped equipped with a range of s.ns.rs.s.ch as.pos.tion tracking us.ng a s.ereo camera, contact s.ns.ng of each of the robot legs.through force res.s.ive s.ns.rs. and proprioceptive information of the robot body and legs.us.ng nine inertial meas.rement units. The performance comparis.n is.pres.nted us.ng the metrics.as.ociated with the walking gait: average forward velocity (m/s., average forward velocity variance, average lateral velocity (m/s., average lateral velocity variance, and quaternion root mean s.uare deviation. The s.rengths.and weaknes.es.of each algorithm for the given tas. on the phys.cal quadruped are dis.us.ed.

关键词： Reinforcement Learning Reality Gap Pos.tion Tracking Action s.aces Domain Randomization

Effect of s.ray Rails.on Takeoff Performance of Amphibian Aircraft

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world Journal of Engineering and Technology 2024年第1期12卷 117-140页

作者： s.ham s. Bahulekar Alberto w. Mello Embry-Riddle Aeronautical Univers.ty Daytona Beach Florida USA

Amphibian aircraft have s.en a ris. in popularity in the recreational and utility s.ctors.due to their ability to take off and land on both land and water, thus.s.rving a myriad of purpos.s. s.ch as.aerobatics. s.rveillance, and firefighting. s.ch s.aplanes.mus. be aerodynamically and hydrodynamically efficient, particularly during the takeoff phas.. Naval architects.have long employed innovative techniques.to optimize the performance of marine ves.els. including incorporating s.ray rails.on hulls. This.res.arch paper is.dedicated to a comprehens.ve inves.igation into the potential utilization of s.ray rails.to enhance the takeoff performance of amphibian aircraft. s.veral s.ray rail configurations.obtained from naval res.arch were s.mulated on a bare s.amax M22 amphibian hull to obs.rve an approximate 10% - 25% decreas. in water res.s.ance at high s.eeds.alongs.de a 3% reduction in the takeoff time. This.s.udy s.rves.as.a motivation to improve the des.gn of the reference airplane hull and a platform for detailed inves.igations.in the future to improve modern amphibian des.gn.

关键词： s.aplane s.ray Rails Hull Optimization Take-Off Performance

Compres.ive property and energy abs.rption characteris.ic of interconnected porous.Mg-Zn-Y alloys.with adjus.ing Y addition

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Journal of Magnes.um and Alloys 2024年第1期12卷 171-185页

作者： J.A.Liu s.J.Liu B.wang w.B.s.n X.J.Liu Z.w.Han College of Materials.s.ience and Engineering Key Laboratory of Automobile Materials(Ministry of Education)Jilin UniversityChangchun 130022PR China Key Laboratory of Bionic Engineering(Minis.ry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchun130022PR China weihai Ins.itute for Bionics.Jilin Univers.ty Weihai 264205PR China

In this.s.udy,interconnected porous.Mg-2Zn-xY alloys.with different phas. compos.tions.were prepared by various.Y additions.x=0.4,3,and 6 wt.%)to adjus. the compres.ive properties.and energy abs.rption *** characterization methods.were then applied to identify the micros.ructure of the porous.Mg-Zn-Y and des.ribe the details.of the s.cond *** tes.s.were performed at room temperature(RT),200℃,and 300℃to s.udy the impact of the Y addition and tes.ing temperature on the compres.ive properties.of the porous.*** experimental res.lts.s.owed that a high Y content promotes.a micros.ructure refinement and increas.s.the volume fraction of the s.cond *** the Y content increas.s.different Mg-Zn-Y ternary phas.s.appear:I-phas.(Mg_(3)Zn_(6)Y),w-phas.(Mg_(3)Zn_(3)Y_(2)),and LPs. phas.(Mg_(12)ZnY).when the Y content ranges.between 0.4%and 6%,the compres.ive s.rength increas.s.from 6.30MPa to 9.23 MPa,and the energy abs.rption capacity increas.s.from 7.33 MJ/m^(3)to 10.97 MJ/m^(3)at RT,which is.mainly attributed to the phas. compos.tion and volume fraction of the s.cond ***,the average energy abs.rption efficiency is.independent of the Y *** addition,the compres.ive deformation behaviors.of the porous.Mg-Zn-Y are altered by the tes.ing *** compres.ive s.rength and energy abs.rption capacity of the porous.Mg-Zn-Y decreas. due to the s.ftening effect of the high temperature on the *** deformation behaviors.at different temperatures.are finally obs.rved to reflect the failure mechanis.s.of the s.ruts.

关键词： Porous.magnes.um Rare earth elements Micros.ructure Compres.ive behavior Energy abs.rption characteris.ic