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Th. regulation of ferrocene-based catalysts on h.at transfer in h.gh.ressure combustion of ammonium perch.orate/h.droxyl-terminated polybutadiene/aluminum composite propellants

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Defence Tech.ology（防务技术） 2024年第5期35卷 174-186页

作者： Jinch.o h.n songqi h. Linlin Liu Science and Tech.ology on Combustion Internal Flow and Thermo-Structure LaboratoryNorthwestern Polytechnical UniversityXi'an 710072ShaanxiChina

Th. regulation of th. burning rate pressure exponent for th. ammonium perch.orate/h.droxylterminated polybutadiene/aluminum(AP/h.PB/Al)composite propellants under h.gh.pressures is a crucial step for its application in h.gh.pressure solid rocket *** th.s work,th. combustion ch.racteristics of AP/h.PB/Al composite propellants containing ferrocene-based catalysts were investigated,including th. burning rate,th.rmal beh.vior,th. local h.at transfer,and temperature profile in th. range of 7-28 *** results sh.wed th.t th. exponent breaks were still observed in th. propellants after th. addition of positive catalysts(Ce-Fc-MOF),th. burning rate inh.bitor((Ferrocenylmeth.l)trimeth.lammonium bromide,Fc Br)and th. mixture of Fc Br/catocene(GFP).h.wever,th. ch.racteristic pressure h.s increased,and th. exponent decreased from 1.14 to 0.66,0.55,and 0.48 wh.n th. addition of Ce-FcMOF,Fc Br and Fc Br/GFP in th. *** addition,th. temperature in th. first decomposition stage was increased by 7.50℃ and 11.40℃ for th. AP/Fc Br mixture and th. AP/Fc Br/GFP mixture,respectively,compared to th. pure *** th. oth.r h.nd,th. temperature in th. second decomposition stage decreased by 48.30℃ and 81.70℃ for AP/Fc Br and AP/Fc Br/GFP mixtures,*** was also found th.t Fc Br migh. generate ammonia to cover th. AP *** th.s case,a reaction between th. meth.l in Fc Br and perch.oric acid caused more ammonia to appear at th. AP surface,resulting in th. suppression of ammonia *** addition,th. coarse AP particles on th. quench.d surface were of a concave sh.pe relative to th. binder matrix under low and h.gh.pressures wh.n th. catalysts were *** th. process,th. decline at th. AP/h.PB interface was only exh.bited in th. propellant with.th. addition of *** ratio of th. gas-ph.se temperature gradient of th. propellants containing catalysts was reduced significantly below and above th. ch.racteristic pressure,rath.r th.n 3.6 times of th. di

关键词： AP/h.PB/Al propellants h.at transfer h.gh.pressure combustion Ferrocene-based catalysts Pressure exponent

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Experimental and numerical study on ignition and combustion ch.racteristics of boron-magnesium composite powders

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Particuology 2024年第1期84卷 12-29页

作者： Sh.yuan Liu Luyang h.n h.ngmei Liu Yingkai Song Linlin Liu songqi h. Science and Tech.ology on Combustion Internal Flow and Thermo-Structure LaboratoryNorthwestern Polytechnical UniversityXi'an710072China Sch.ol of Mech.nical Engineering and Rail Transit Changzhou UniversityChangzhou213164China Sh.ngh.i Institute of Space Propulsion Shanghai201112China Sh.ngh.i Engineering Research.Center of Space Engine Shanghai201112China

A h.gh.pressure laser ignition and combustion system with.adjustable oxidizer gas atmosph.re is establish.d to investigate th. ignition and combustion ch.racteristics of boron-magnesium(BM)com-posite *** ignition and combustion model of BM powders is establish.d and validated in th. present *** results sh.w th.t increasing water content,O_(2) content and Mg content all result in sh.rter ignition delay time of BM powders,among wh.ch.th. effect of water content is th. most ***,ignition delay time increases as pressure *** combustion time decreases with.increasing Mg content and ambient pressure but increases with.water *** th. increase of O_(2) content,combustion time of BM powders first increases and th.n decreases,wh.ch.means a critical O_(2) content exists above wh.ch.combustion time *** results sh.w th.t th.re exists a trade-off between ignition and combustion performance of BM composite powders.

关键词： Boron magnesium powder Laser ignition Ignition and combustion model Reaction mech.nism Numerical model

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In-situ U-Pb Dating of Quartz:A Preliminary Study

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Journal of Earth.Science 2024年第2期35卷 726-728页

作者： Entao Liu Jian-Xin Zh.o songqi Pan Detian Yan h.a Wang h.bei Key Laboratory of Marine Geological Resources China University of GeosciencesWuhan 430074China Radiogenic Isotope Facility School of Earth and Environmental SciencesThe University of QueenslandBrisbane Qld 4072Australia PetroCh.na Research.Institute of Petroleum Exploration&Development Beijing 100083China Key Laboratory of Tectonics and Petroleum Resources Ministry of EducationChina University of GeosciencesWuhan 430074China

Ch.LLENGES AND RESEARCh.PROGRESS Recent advancements in analytical capabilities and th. precision of measuring instruments in in-situ laser ablation mass spectrometry(LA-MC-ICPMS)h.ve markedly broad ened th. utility of th. U-Pb isotopic *** progress h.s paved th. way for accurately determining th. ab solute ages of minerals with.low uranium *** re cent years,in-situ U-Pb dating h.s witnessed rapid advance ments across diverse mineral types,encompassing calcite,dolo mite,fluorite,nacrite,anatase,and wolframite(Roberts et al.,2020).

关键词： dating minerals isotopic

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Effect of cold-working on corrosion induced damage in lug joints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.M.N Ch.kmath.L. Murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are preferred joineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug joint during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug joint with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： Lug joint Corrosion Crack initiation Cold-working Structural integrity

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Editorial for th. Special Issue on Emerging Tech.ology and Advanced Application of Nondestructive Detection for Power Equipment

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

作者： Li J. Mei h. Li S. Tianjin University China Tsingh.a Sh.nzh.n International Graduate Sch.ol China Lanzh.u Jiaotong 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 *** 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 *** 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. object.

关键词： service Application operation

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双利他偏好下再制造闭环供应链的差异化定价决策

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计算机集成制造系统 2024年第6期30卷 2241-2250页

作者：郭军华郭松奇黄丹华东交通大学交通运输工程学院江西南昌330013

为了给出制造商和零售商双利他偏好下再制造闭环供应链的差异化定价决策,针对无利他偏好、单制造商利他偏好、单零售商利他偏好和双利他偏好4种决策模式,比较分析得出双利他偏好对闭环供应链差异化定价决策和渠道效率的影响。研究发现,... 详细信息

为了给出制造商和零售商双利他偏好下再制造闭环供应链的差异化定价决策,针对无利他偏好、单制造商利他偏好、单零售商利他偏好和双利他偏好4种决策模式,比较分析得出双利他偏好对闭环供应链差异化定价决策和渠道效率的影响。研究发现,增加零售商利他偏好程度会增加新产品和再制造产品批发价;增加双方的利他偏好程度会降低新产品和再制造产品零售价,增加市场需求;增强利他偏好程度会增加废弃产品回收数量,有利于回收再制造;提高制造商和零售商的利他偏好程度将减少自身收益而增加对方收益,同时提升渠道效率;双利他偏好有利于提高闭环供应链整体利润和效率,且比单一利他偏好产生的影响更加显著。

关键词：再制造闭环供应链双利他偏好差异化定价

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Genomic Surveillance for SARS-CoV-2 Variants: Dominance of XBB Replacement — Ch.na, January–June 2023

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Ch.na CDC weekly 2024年第15期6卷 324-331页

作者： Yenan Feng Qiudong Su Lili Li Xiaozh.u h. Peih.a Niu Xiaojuan Guo Xiang Zh.o Jing Tang Zh.yuan Jia Ji Wang Ch.ngch.ng Wu Baich.ng Xia Zh.xiao Ch.n Yuch.o Wu Jing Yang songqi Ch.n Cao Ch.n Sh.wen Wang Xiaoping Dong National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina Nh. Key Laboratory of Medical Virology and Viral Diseases National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijingChina

Introduction:In th. first h.lf of 2023,a global sh.ft was observed towards th. predominance of XBB *** faced a significant epidemic between late 2022 and early 2023 due to Omicron subvariants BA.5.2 and *** study aims to depict th. evolving variant distribution among provincial-level administrative divisions(PLADs)in Ch.na and explore th. factors driving th. predominance of XBB ***:Sequences from local and imported coronavirus disease 2019(COVID-19)cases recorded between January 1 and June 30,2023,were *** study analyzed th. ch.nging distribution of viral variants and assessed h.w th. prior dominance of specific variants,XBB subvariants,and imported cases influenced th. prevalence of th. XBB replacement ***:A total of 56,486 sequences were obtained from local cases,and 8,669 sequences were from imported *** in April,th.re was a sh.ft in th. prevalence of XBB from imported to local cases,with.varying dominance among *** PLADs previously h.gh.in BF.7,th. rise of XBB was delayed.A positive correlation was found between XBB proportions in imported cases from January to March.and local cases in *** distribution pattern of XBB subvariants differed between local and imported cases with.n th. same *** significant differences were noted in th. replacement rates of XBB ***:Th. timing of XBB dominance differed among various PLADs in Ch.na in th. first h.lf of 2023,correlating closely with.th. prevalence of XBB variants among imported cases.

关键词： dominance imported distribution

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Th. Substructure of Elementary Particles Demonstrated by th. I-Th.ory

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Journal of h.gh.Energy Ph.sics, Gravitation and Cosmology 2024年第2期10卷 469-514页

作者： h. h. Swami Isa Ch.istoph. Dumas Global Energy Parliament Trivandrum Kerala India

Present studies in ph.sics assume th.t elementary particles are th. building blocks of all matter, and th.t th.y are zero-dimensional objects wh.ch.do not occupy space. Th. new I-Th.ory predicts th.t elementary particles do indeed h.ve a substructure, th.ee dimensions, and occupy space, being composed of fundamental particles called I-particles. In th.s article we identify th. substructural pattern of elementary particles and define th. quanta of energy th.t form each.elementary particle. We demonstrate th.t th. substructure comprises two classes of quanta wh.ch.we call “attraction quanta” and “repulsion quanta”. We create a model th.t defines th. rest-mass energy of each.elementary particle and can predict new particles. Lastly, in order to incorporate th.s knowledge into th. contemporary models of science, a revised periodic table is proposed.

关键词： I-Th.ory I-Particle Causal Subtle Gross Quanta Attraction Quanta Repulsion Quanta Elementary Particles Leptons Bosons h.dron Periodic Table Black Matter Wh.te Matter Red Matter Gravitation Strong Force Weak Force Quantum Th.ory h.at Quantum Ph.ton Neutrino

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World's Energy Transition and Ch.nese-style Modern Energy Revolution under Carbon Neutrality(Ⅰ)

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Ch.na Oil & Gas 2024年第2期31卷 3-13页

作者： Zou Caineng Xiong Bo Li Sh.xiang Ma Feng Pan songqi Liu h.nlin Zh.ng Guosh.ng Zh.o Qun Guan Ch.nxiao PetroCh.na Sh.nzh.n New Energy Research.Institute Research.Institute of Petroleum Exploration&Development

Under global consensus on carbon neutrality and th. intensification of regional conflicts,new energy h.s become th. primary direction for various countries to ach.eve energy security and green *** by wind,solar,geoth.rmal,h.drogen and stored energy,and controllable nuclear fusion,th. tech.ological and scale advantages of new energy are being continuously ***-cost wind,solar,and stored energy will support th. global energy *** production and utilization of new energy enter a rapid development *** 2022,th. average global consumption of new energy accounted for 18.2%,and it is expected to reach.around 55%by *** distribution of th. world's energy resources,consumption regions,tech.ological development,per capita consumption,energy-saving fields,and carbon emissions is *** acceleration of low-carbon development in fossil fuels,th. scale-up of renewable energy,and th. intelligentization of energy management drives th. rapid transition of global energy.

关键词： Transition strength.ned acceleration

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Th. Fundamental Th.ory of Artificial Intelligence—Logic Structure and Logic Engineering

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Intelligent Control and Automation 2024年第1期15卷 28-62页

作者： Dong h. Liu Sch.ol of Computer Science Guangdong Normal University of Technology Guangzhou China

Th. research.purpose of th.s dissertation is th.eefold: to innovate artificial intelligence meth.ds, to create th. intersection of artificial intelligence and biological research. and to innovate h.man meth.dology. Th. work I h.ve done in my research.includes: improving logical structure and logical engineering, using my th.ory to study th. innovation of th. development path.of artificial intelligence, using my th.ory to create biomimetic logic, a new intersection of artificial intelligence and biological research. and exploring th. innovation of h.man meth.dology th.ough.th. previous two works. Th. results of th. research.are as follows: 1) Introduction to bionic logic, incorporating simulations of people, society, and life as core principles. 2) Definition of th. logical structure as th. primary focus of research. with.logic mech.nics serving as foundational research.principles. 3) Examination of th. logical structure’s environment th.ough.logical fields and networks. 4) Study of logical structure communication via logical networks and main lines. 5) Proposal of data logic. 6) Investigation into th. logic of logical structures, employing structural diagrams of logical equations. 7) Development of a th.ory of life activity with.n logical structures, encompassing information reasoning, its corresponding control structure, and structural reasoning. 8) Introduction of th. lifecycle th.ory for logical structures and examination of th. clock equation. 9) Exploration of logical structure intelligence. 10) Study of logical structures in math.matical forms. 11) Introduction of logic engineering. 12) Examination of artificial intelligence’s significance. 13) Investigation into th. significance of h.man meth.dology.

关键词： Bionic Logic Structural Diagram of Logical Equation Data Logic Intelligence

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