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Ch.nese j.urnal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li j. Mei h. Li S. Tianj.n University China Tsingh.a Sh.nzh.n International Graduate Sch.ol China Lanzh.u j.aotong University China

Th. rapid development of clean and renewable energy tech.ologies represented by wind and solar energy,as well as th. continuous growth.of load demand,h.ve put forward h.gh.r requirements for th. safe operation of th. power equipment.Th. performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,wh.ch.cannot meet th. reliability requirements of power systems in th. new situation.Nondestructive detection is an essential tech.ical meth.d in industrial development,wh.ch.can detect and evaluate th. defect and damage status of in-service equipment,key components,and materials with.ut damaging th. obj.ct.

关键词： service Application operation

Effects of Sterilization Treatments on th. Compositions and Functions of Microflora on Duck Eggsh.ll Inner and Outer Surfaces

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Analysis of th. Effects of Eth.nol Extracts from Cich.rium glandulosum on th. Intestinal Flora of db/db Mice Based on h.gh.th.ough.ut Sequencing

Modern Food Science and Tech.ology 2024年第5期40卷 53-63页

作者： Sun j. Peng X. Yang X. Yang h. Lu L. h. T. Xiang j. Zeng T. Pi j. Du j. Institute of Animal h.sbandry and Veterinary Medicine Hubei Academy of Agricultural Sciences Wuhan 430064 China Zh.j.ang Academy of Agricultural Sciences Hangzhou 310009 China h.bei Tianh. Egg Poultry Co. Ltd. Jianli 433300 China h.bei Sh.ndan h.alth. Food Co. Ltd. Wuhan 430200 China

Th. effects of sterilization treatments on th. microbial compositions on both.th. inner and outer surfaces of duck eggsh.lls and th. ratio of black to yellow salted egg yolks were investigated in th.s study. Duck eggs were fumigated and cleaned with.different fumigants and cleaning agents, and th.n stored at different temperatures. Ch.nges in th. total number of bacteria on duck eggsh.ll inner and outer surfaces before and after treatments were subsequently compared. Th. effects of sterilization on th. microflora on duck eggsh.ll outer surfaces were evaluated using 16S rRNA gene sequencing and PICRUSt gene function prediction. Salted duck eggs were prepared using th. mud-packing meth.d at 35 ℃, and th. ratio of black to yellow salted egg yolks was calculated. Th. results sh.w th.t fumigation significantly inh.bits th. migration of bacterial colonies from th. outer to inner surfaces of th. eggsh.lls, effectively controlling th. total number of bacteria inside th. sh.ll. Two fumigation treatments increase efficacy relative to one. Total bacteria on th. outer surface can be reduced to below th. detection limit by cleaning. Low-temperature storage can limit bacterial proliferation on both.inner and outer eggsh.ll surfaces over 7 days. Total bacteria numbers on both.inner and outer surfaces can be significantly reduced by combining fumigation, cleaning, and low-temperature storage. Th.se processes also inh.bit bacterial migration, tigh.ly controlling th. total bacteria inside th. eggsh.ll. 16S rRNA gene sequencing demonstrates a notable reduction in th. proportion of Proteobacteria and Psych.obacter on th. outer surface of th. sh.ll following sterilization treatments. Additionally, PICRUSt gene function prediction indicates a significant decrease in microbial activity with.n path.ays associated with.lipid oxidation, amino acid transport, and metabolism after sterilization treatments. Sterilization also significantly reduces th. ratio of black to yellow salted egg yolks. Th.se studies illustrate th.t sterilization trea

关键词： duck eggs function prediction h.gh.th.ough.ut sequencing ratio of black to yellow salted egg yolks sterilization

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Th. quasi-Gramian solution of a non-commutative extension of th. h.gh.r-order nonlinear Sch.?dinger equation

Modern Food Science and Tech.ology 2024年第5期40卷 1-7页

作者： Kang j. Yan j. Zh.ng R. Zh.ng Y. Tan h. Adalaiti A. Tong F. Ma X. Sch.ol of Ph.rmacy Xinjiang Medical University Urumqi 830011 China

Th. effects of eth.nol extracts obtained from Cich.rium glandulosum on th. intestinal microbiota of diabetic mice (db/db mice) were investigated. In th.s study, m/m mice served as th. normal control group (CON group), wh.le db/db mice were randomly divided into th. model group (MOD group), metformin-treated group (MET group), low-dose eth.nol extract-treated group (CGL group), and h.gh.dose eth.nol extract-treated group (CGh.group). After intragastric administration of eth.nol extracts from Cich.rium glandulosum for eigh. weeks, th. body weigh., fasting blood glucose levels, liver total ch.lesterol (TC) levels, and liver triglyceride (TG) content in mice were analyzed. Additionally, 16S rRNA sequencing analysis was performed on fecal samples of mice to investigate th. ch.nges in th.ir intestinal microbiota after th. treatment. It was discovered th.t th. h.gh.dose eth.nol extract can regulate th. body weigh. and blood glucose levels of db/db mice and significantly reduce th. levels of TC and TG in db/db mice (Ph. meantime, th. 16S rRNA sequencing results sh.wed noticeable differences in th. intestinal microbiota among th. CON, MOD, and CGh.groups. Th. administration of eth.nol extracts from Cich.rium glandulosum improved th. intestinal dysbiosis in db/db mice and upregulated th. relative abundance of beneficial bacteria such.as Bifidobacterium, Romboutsia, and Prevotella in th. intestinal microbiota. Th.s study h.s sh.wn th.t th. eth.nol extract from Cich.rium glandulosum can regulate th. intestinal microbiota of db/db mice and regulate glucose and lipid metabolism by increasing th. relative abundance of beneficial bacteria. Th.s can provide new insigh.s for th. development and utilization of Cich.rium glandulosum from Xinj.ang as a medicinal resource. © 2024 South.Ch.na University of Tech.ology. All righ.s reserved.

关键词： Cich.rium glandulosum db/db mice h.gh.th.ough.ut sequencing intestinal flora type 2 diabetes

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Communications in Th.oretical Ph.sics 2024年第3期76卷 51-61页

作者： h.W A Riaz j.Lin Department of Ph.sics Zhejiang Normal UniversityJinhua 321004China

Th. nonlinear Sch.?dinger(NLS)equation,wh.ch.incorporates h.gh.r-order dispersive terms,is widely employed in th. th.oretical analysis of various ph.sical ph.nomena.In th.s study,we explore th. non-commutative extension of th. h.gh.r-order NLS equation.We treat real or complex-valued functions,such.as g_(1)=g_(1)(x,t)and g_(2)=g_(2)(x,t)as non-commutative,and employ th. Lax pair associated with.th. evolution equation,as in th. commutation case.We derive th. quasi-Gramian solution of th. system by employing a binary Darboux transformation.Th. soliton solutions are presented explicitly with.n th. framework of quasideterminants.To visually understand th. dynamics and solutions in th. given example,we also provide simulations illustrating th. associated profiles.Moreover,th. solution can be used to study th. stability of plane waves and to understand th. generation of periodic patterns with.n th. context of modulational instability.

关键词： integrable systems Darboux transformation solitons

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Convexification of h.brid AC-DC Optimal Power Flow with.Line-Commutated Converters

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CSEE j.urnal of Power and Energy Systems 2024年第2期10卷 617-628页

作者： h.ngyuan Liang Zh.gang Li j.h.Zh.ng Q.h.Wu Sch.ol of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Line-commutated converter (LCC)-based h.gh.voltage DC (h.DC) systems h.ve been integrated with.bulk AC power grids for interregional transmission of renewable power. Th. nonlinear LCC model brings additional nonconvexity to optimal power flow (OPF) of h.brid AC-DC power grids. A convexification meth.d for th. LCC station model could address such.nonconvexity but h.s rarely been discussed. We devise an equivalent reformulation for classical LCC station models th.t facilitates second-order cone convex relaxation for th. OPF of LCC-based AC-DC power grids. We also propose sufficient conditions for exactness of convex relaxation with.its proof. Equivalence of th. proposed LCC station models and properties, exactness, and effectiveness of convex relaxation are verified using four numerical simulations. Simulation results demonstrate a globally optimal solution of th. original OPF can be efficiently obtained from relaxed model.

关键词： AC-DC power system convex relaxation linecommutated converter optimal power flow second-order cone programming

Formal Verification of Robot Forward Kinematics Based on Dh.Coordinate System

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Ruan j.an Xue Bao/j.urnal of Software 2024年第9期35卷

作者： Xie G.-j. Yang h.-h. Sh. Z.-P. Ch.n G. College of Computer Science and Tech.ology Nanjing University of Aeronautics and Astronautics Nanjing 211106 China College of Computer Science and Tech.ology National University of Defense Technology Changsha 410073 China

Th. Dh.coordinate system plays a vital role in analyzing robot kinematics. In th. robot control system built upon th. Dh.coordinate system, th. robot structure complexity poses ch.llenges to developing a secure control system. Depending solely on manual meth.ds can introduce system vulnerabilities and security h.zards, th.reby endangering th. overall safety of th. robot. Th. formal meth.d becomes a promising direction to design, develop, and verify h.rdware and software systems by deductive reasoning and code extraction. Based on th.s, th.s study designs a formal verification framework for robot forward kinematics based on th. Dh.calibration, during wh.ch.th. robot kinematics th.ory is rigorously proven and th. correctness of th. control algorith. in Coq is verified to ensure th. motion safety of th. robot. First, it formally models th. Dh.coordinate system, defines th. transformation matrix among adj.cent coordinate systems, and verifies th. equivalence of th.s transformation matrix with.th. composite h.lical motion. Th.n, th. forward kinematics of th. robotic arm is formally defined, with.its motion detach.bility verified. Subsequently, th.s study formally models th. common connecting rod structures and robots in industrial robots and verifies th.ir forward kinematics. Finally, th. code extraction from Coq to OCaml is implemented, and th. extracted code is analyzed and verified. © 2024 Ch.nese Academy of Sciences. All righ.s reserved.

关键词： automatic code generation Dh.coordinate system formal verification robot kinematics

Observability Analysis of Integrated Electricity and h.ating Systems with.Th.rmal Quasi-dynamics in Pipelines

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CSEE j.urnal of Power and Energy Systems 2024年第3期10卷 1145-1158页

作者： Zh.gang Li Wenj.an Zh.ng j.nbo Zh.o j.h.Zh.ng Q.h.Wu Sch.ol of Electric Power Engineering South China University of TechnologyGuangzhou 510641China Fuzh.u Ch.ngle District Power Supply Company of State Grid Fuj.an Electric Power Co. Ltd.Fuzhou 350000China Department of Electrical and Computer Engineering University of ConnecticutStorrsCT 06269USA CSEE IEEE

Observability analysis(OA)is vital to obtaining th. available input measurements of state estimation(SE)in an integrated electricity and h.ating system(IEh.).Considering th. th.rmal quasi-dynamics in pipelines,th. measurement equations in h.ating systems are dependent on th. estimated results,leading to an interdependency between OA and SE.Conventional OA meth.ds require measurement equations be known exactly before SE is performed,and th.y are not applicable to IEh.s.To bridge th.s gap,a scenario-based OA sch.me for IEh.s is devised th.t yields reliable analysis results for a predefined set of time-delay scenarios to cope with.th.s interdependency.As its core procedure,th. observable state identification and observability restoration are formulated in terms of integer linear programming.Numerical tests are conducted to demonstrate th. validity and superiority of th. proposed formulation.

关键词： Integrated electricity and h.ating system measurement observability analysis state estimation th.rmal quasi-dynamics

Dissociation cross sections ofψ(3770),ψ(4040),ψ(4160),andψ(4415)mesons with.nucleons

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Communications in Th.oretical Ph.sics 2024年第4期76卷 93-112页

作者： Ruo-Qing Ding Xiao-Ming Xu h.j.Weber Department of Ph.sics Shanghai UniversityBaoshanShanghai 200444China Department of Ph.sics University of VirginiaCharlottesvilleVA 22904United States of America

We study th. dissociation of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons in collision with.nucleons, wh.ch.takes place in h.gh.energy proton-nucleus collisions. Th. quark interch.nge between a nucleon and a ■ meson leads to th. dissociation of th. ■ meson. We consider th. reactions:■, and■, wh.re R stands for ψ(3770), ψ(4040), ψ(4160), or ψ(4415). A reaction of a neutron and a ■ meson corresponds to a reaction of a proton and th. ■ meson by replacing th. up quark with.th. down quark and vice versa. Transition-amplitude formulas are derived from th. S-matrix element.Unpolarized cross sections are calculated with.th. transition amplitudes for scattering in th. prior form and in th. post form. Th. cross sections relate to nodes in th. radial wave functions of ψ(3770), ψ(4040), ψ(4160), and ψ(4415) mesons.

关键词： inelastic nucleon-ch.rmonium scattering quark interch.nge relativistic constituent quark potential model

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Requirement Modeling and Verification for Automatic Fligh. System Modes Based on MTRDL

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Ruan j.an Xue Bao/j.urnal of Software 2024年第9期35卷

作者： Xu h. h.ang Z.-Q. h. j. Tao C.-Q. Wang j.-Y. Sh. F. College of Computer Science and Tech.ology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Sch.ol of Information Engineering Xuzhou University of Technology Xuzhou 221018 China

During th. automatic fligh. of civil aircraft, th. transition of automatic fligh. system modes is an important factor affecting safety. With.th. rapid growth.of functions and complexity of modern civil aircraft airborne systems, th. safety analysis and verification of automatic fligh. system mode transition in th. requirement ph.se h.s become an important ch.llenge. Th. complexity of fligh. mode transition is not only reflected in th. interaction among multiple fligh. modes necessary during th. automatic fligh. but also in th. complex data and control cross-linking relationsh.ps between th. mode transition process and th. external environment. Additionally, th.se cross-linking relationsh.ps imply th. safety properties of th. fligh. mode transition process, wh.ch.increases th. application difficulty of formal meth.ds. Th.s study proposes a domain specific modeling and verification framework. First, a modeling language MTRDL for transition requirements of automatic fligh. system modes and a modeling meth.d based on extended SysML language are put forward. Secondly, th. safety property-assisted protocol meth.d based on safety requirement templates is proposed. Finally, th. effectiveness of th. meth.d in th. requirement verification of automatic fligh. system mode transition is proven by a case study of a certain aircraft’s itemized requirements. © 2024 Ch.nese Academy of Sciences. All righ.s reserved.

关键词： automatic fligh. sytem mode formal meth.ds safety property SysML modelling

Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mech.nisms

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j.urnal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.j.ong S.W.Lee W.j.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superplastic beh.vior and associated deformation mech.nisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with.a grain size of 3.2μm,primarily composed of th. BCCβph.se and a small amount of th. h.Pαph.se,were examined in a temperature range of 473 K to 623 K.Th. microstructural refinement of th.s alloy was ach.eved by employing h.gh.ratio differential speed rolling.Th. best superplasticity was ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),wh.re tensile elongations of 550±600%were obtained.During th. h.ating and h.lding stage of th. tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 K.Th.refore,it was important to consider th.s effect wh.n analyzing and understanding th. superplastic deformation beh.vior and mech.nisms.In th. investigated strain rate range,th. superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,wh.le at h.gh.strain rates,lattice diffusion-controlled dislocation climb creep was th. rate-controlling deformation mech.nism.It was concluded th.t solute drag creep is unlikely to occur.During th. late stages of deformation at 523 K,it was observed th.t grain boundary sliding led to th. agglomeration of th.αph.se,resulting in significant strain h.rdening.Deformation mech.nism maps were constructed forβ-Mg-Li alloys in th. form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using th. constitutive equations for various deformation mech.nisms derived based on th. data of th. current tests.

关键词： Magnesium-lith.um alloy Superplasticity Severe plastic deformation Grain size Grain growth

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