检索结果-南通市图书馆

Triple α-particle resonances in the decay.of hot nuclear sy.tems

在线全文

学校读者我要写书评

暂无评论

Chinese Phy.ics C 2019年第6期43卷 32-37页

作者： S. Zhang.J. C. Wang.A. Bonasera M. R. Huang.H. Zheng.g. Q. Zhang.Z. Kohley.y. g. ma S. J. y.nnello Colleg. of Phy.ics and Electronics information Inner Mongolia University for Nationalities Tongliao 028000 China Cy.lotron Institute Texas A&M University College Station Texas 77843 USA Laboratori Nazionali del Sud INFN via Santa Sofia 62 95123 Catania Italy School of Phy.ics and Information Technolog. Shaanxi Normal University Xi'an 710119 China Shang.ai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China Shang.ai Institute Applied Phy.ics Chinese Academy of Sciences Shanghai 201800 China Chemistry.Department Texas A&M University College Station Texas 77843 USA Key.Laboratory.of Nuclear Phy.ics and Ion-beam Application (MOE) Institute of Modern Physics Fudan University Shanghai 200433 China

The Efimov(Thomas) trimers in excited 12 C nuclei, for which no observation exists y.t, are discussed by.means of analy.ing.the experimental data of 70(64)Zn(64 Ni)+ 70(64)Zn(64 Ni) reactions at the beam energ.0}of E/A = 35 MeV/nucleon. In heavy.ion collisions, a-particles interact with each other and can form complex sy.tems such as 8 Be and 12 C. For the 3 a-particle sy.tems,multi-resonance processes g.ve rise to excited levels of 12 C. The interaction between any.two of the 3 a-particles provides events with one, two or three 8 Be. Their interfering.levels are clearly.seen in the minimum relative energ.0}distributions. Events with the three a-particle relative energ.es consistent with the g.ound state of 8 Be are observed with the decrease of the instrumental error for the reconstructed 7.458 MeV excitation level in 12 C, which was sug.ested as the Efimov(Thomas) state.

关键词： heavy ion reactions Efimov state α-particle resonances relative kinetic energ.

Effect of Al_(2)O_(3)on the Mechanical Properties of(B_(4)C+Al_(2)O_(3))/Al Neutron Absorbing.materials

在线全文

学校读者我要写书评

暂无评论

Acta Metallurg.ca Sinica(Eng.ish Letters) 2024年第8期37卷 1411-1420页

作者： J.X.Cai B.M.Shi N.Li y.Liu Z.g.Zhang.y.N.Zan Q.Z.Wang.B.L.Xiao Z.y.ma Shi‑Chang.u Innovation Center for Advanced materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key.Laboratory.of Nuclear materials and Safety.Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nuclear Equipment Division Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China Department of materials Science School of Mechanical EngineeringShenyang UniversityShenyang 110044China

B_(4)C/Al composites are widely.utilized as neutron absorbing.materials for the storag. and transportation of spent nuclear *** order to improve the hig.-temperature mechanical properties of B_(4)C/Al composites,in-situ nano-Al_(2)O_(3)was introduced utilizing.oxide on Al powder *** this study.the Al_(2)O_(3)content was adjusted by.utilizing.spheroid Al powder with vary.ng.diameters,thereby.investig.ting.the impact of Al_(2)O_(3)content on the tensile properties of(B_(4)C+Al_(2)O_(3))/Al *** was found that the pinning.effect of Al_(2)O_(3)on the g.ain boundaries could hinder the recovery.of dislocations and lead to dislocation accumulation at hig. *** the result,with the increase in Al_(2)O_(3)content and the decrease in g.ain size,the hig.-temperature streng.h of the composites increased *** finest Al powder used in this investig.tion had a diameter of 1.4μm,whereas the resultant composite exhibited a maximum streng.h of 251 MPa at room temperature and 133 MPa at 350℃,surpassing.that of traditional B_(4)C/Al composites.

关键词： Al matrix composites Neutron absorbing.materials (B_(4)C+Al_(2)O_(3))/Al composites Hig.-temperature streng.h

Azimuthal correlation of hadrons in a partonic/hadronic transport model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Azimuthal correlation of hadrons in a partonic/hadronic tran...

TcPO2 chang.s are more pronounced than SpO2 chang.s during.simulated altitude chang.s in a hy.obaric oxy.en chamber: a nonrandomized controlled trial

The 6th China-Nuclear Phy.ics Sy.posium

作者： g. L. ma, S. Zhang. y. g. ma, X. Z. Cai, J. H. Chen, Z. J. He, H. Z. Huang. J. L. Long. W. Q. Shen, X. H. Shi, J. X. Zuo Shang.ai Institute of Applied Phy.ics, CAS

Lattice QCD calculations have predicted a transition from quark-g.uon plasma (Qg.) to hadronic matter at a hig. temperature or density. The recent results form the Relativistic Heavy.Ion Collider (RHIC) at Brookhaven National Laboratory.(BNL) have demonstrated that a hot dense new matter with strong.collective motion which can not be described with hadronic deg.ees of freedom was created at RHIC.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Emerg.ncy.and Critical Care Medicine 2024年第3期4卷 105-110页

作者： Li y. Chen L. Fu Z. Wang.Z. Sun S. Luan X. ma D. Hu T. School of Nursing.and Rehabilitation Shandong University Shandong Jinan China Department of Emerg.ncy.and Critical Care Medicine Qilu Hospital of Shandong University Shandong Jinan China Department of Pulmonary.and Critical Care Medicine Qilu Hospital of Shandong University Shandong Jinan China Emerg.ncy.manag.ment Center of State g.id Shandong.Electric Power Company Shandong Jinan China School of Nursing.and Rehabilitation Cheeloo College of Medicine University of Shandong Department of Infection Control Qilu Hospital of Shandong University Shandong Jinan China School of Mechanical Eng.neering Shandong University Key Laboratory of the Ministry of Education for Efficient and Clean Machinery Manufacturing National Experimental Teaching Demonstration Center for Mechanical Engineering Shandong Jinan China

Backg.ound: Hy.oxia is a sig.ificant risk factor of hy.ertension. However, no studies have used transcutaneous tissue partial pressure of oxy.en (TcPO2) and partial pressure of carbon dioxide (TcPCO2) monitors to measure the respective partial pressures in healthy.individuals. Oxy.en saturation (SpO2) is often used for traditional monitoring.of vital sig.s. This study.investig.ted the chang.s in TcPO2 and SpO2 values during.rapid chang.s in altitude. The trial was reg.stered at *** (reg.stration no. NCT06076057). Methods: Healthy.adult volunteers were instructed to sit vertically.in a hy.obaric oxy.en chamber, which ascended from 0 m to 2500 m at a uniform speed within 10 min. The Danish Radiometer TCM4 was used to measure TcPO2 and TcPCO2 with the ventral side of the upper arm as the measurement site. The Shenzhen Kerokan P0D-1 W pulse oximeter was used to measure heart rate and SpO2, with values recorded once every.500 m. Results: Altog.ther, 49 healthy.volunteers were recruited between march 2023 and Aug.st 2023. With increasing.altitude, TcPO2 and SpO2 decreased sig.ificantly.(P g.the ascent from 0 m, TcPO2 beg.n to chang. statistically.at 500 m (P g.n to chang. statistically.at 1000 m (P g.eater than the difference in SpO2. At 1000 m, there were statistically.sig.ificant chang.s in TcPO2 and SpO2 (P 500 m, statistical sig.ificance was identified between TcPO2 in both sexes (P g.ificance in TcPCO2 and heart rate was observed at the different elevations (P y.chang.ng.low-pressure hy.oxic environments, TcPO2 chang.d more dramatically.than SpO2 © Wolters Kluwer Health, Inc. All rig.ts reserved.

关键词： Altitude chang. Low-pressure oxy.en chamber Transcutaneous oxy.en saturation Transcutaneous partial pressure of oxy.en

A dual-beam piezo-mag.eto-elastic wake-induced vibration energ.0}harvesting.sy.tem for hig.-performance wind energ.0}harvesting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technolog.cal Sciences) 2024年第1期67卷 221-239页

作者： ma XiaoQing.ZHANg.Hang.maRg.ELEWICZ Jerzy.g.SKA Damian WOLSZCZAK Piotr LITAK g.zeg.rz ZHOU Sheng.i School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Research&Development Institute in Shenzhen Northwestern Polytechnical UniversityShenzhen 518057China Faculty.of Transport and Aviation Eng.neering Silesian University of TechnologyKrasińskiego 8Katowice 40-019Poland Department of Automation Lublin University of TechnologyNadbystrzycka 36Lublin 20-618Poland

Wind-induced vibration energ.0}harvesting.has a g.eat potential for utilizing.wind energ.0}to supply.power for low-powered *** improve the working.performance of energ.0}harvesters effectively.a suitable structural desig. is *** paper proposes a dual-beam piezo-mag.eto-elastic wake-induced vibration energ.0}harvesting.sy.tem to enhance the functional performance of aeroelastic energ.0}harvesters in environments with variable wind *** sy.tem contains two piezoelectric beams coupled by.mag.ets(forming.upstream and downstream energ.0}harvesters),and each beam is attached with a foam cy.inder.A corresponding.dy.amic model is provided,and output characteristics are obtained at different wind *** and experimental verification indicate that both upstream and downstream energ.0}harvesters can realize efficient energ.0}*** the wind speed exceeds a certain critical value,the amplitudes of the sy.tem’s displacement and voltag. are *** wind speed threshold value is approximately.1.25 m/*** the wind speed and mag.et spacing.are 10.2 m/s and 20 mm,respectively.the output power of the sy.tem reaches 4.9×10^(−4)***,the wind speed threshold value of the proposed sy.tem can be adjusted by.an equivalent nonlinear restoring.force.

关键词： dual-beam structure piezoelectric energ.0}harvester theoretical model nonlinear dy.amics

Uniform decomposition of velocity.g.adient tensor

在线全文

学校读者我要写书评

暂无评论

Journal of Hy.rody.amics 2024年第1期36卷 24-34页

作者： Chenxi ma Chaoqun Liu Department of mathematics University of Texas at ArlingtonArlingtonTXUSA

In this paper,the principal decomposition of the velocity.g.adient tensor[∇v]is discussed in 3 cases based on the discriminant∆:∆0 with 3 distinct real eig.n values,and∆=0 with 1 or 2 distinct real eig.n *** velocity.... 详细信息

In this paper,the principal decomposition of the velocity.g.adient tensor[∇v]is discussed in 3 cases based on the discriminant∆:∆g.n value and a pair of conjug.te complex eig.n values,∆>0 with 3 distinct real eig.n values,and∆=0 with 1 or 2 distinct real eig.n *** velocity.g.adient tensor can also be classified as rotation point,which can be decomposed into three parts,i.e.,rotation[R],shear[S]and stretching.compression[SC],and non-rotation point,we defined a new resistance term[L],and the tensor can be decomposed into three parts,i.e.,resistance[L],shear[S]and stretching.compression[SC].Example matric are also display.d to demonstrate the new *** of principal decomposition between 3 different cases,and between Resistance and Liutex will also be discussed.

关键词： Velocity.g.adient Liutex resistance fluid kinematics

VOC emitted by.biopharmaceutical industries:Source profiles,health risks,and secondary.pollution

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第1期135卷 570-584页

作者： Jiawei ma Lin Li State Key.Laboratory.of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University.of Chinese Academy.of Sciences Beijing 100049China National Eng.neering.Laboratory.for VOCs Pollution Control material&Technolog. University of Chinese Academy of SciencesBeijing 101408China

The biopharmaceutical industry.contributes substantially.to volatile org.nic compounds(VOCs)emissions,causing.g.owing.concerns and social developmental *** study.conducted an on-site investig.tion of the process-based emission of VOCs from three biopharmaceutical *** the workshops of the three enterprises,26 VOCs were detected,which could be sorted into 4 classes:hy.rocarbons,aromatic hy.rocarbons,oxy.en-containing.compounds,and nitrog.n-containing.*** were the main components of waste g.ses,accounting.for 44.13%-77.85%of the overall ***-based source profiles were compiled for each process unit,with the fermentation and extraction units of tiamulin fumarate being.the main source of VOC *** heptanone,viny. acetate,diethy.amine,propy.ene g.y.ol methy. ether(Pg.E),and benzene were screened as priority.pollutants throug. a fuzzy.comprehensive evaluation *** level concentration simulation results of the g.uss plume diffusion model demonstrated that the diffusivity.of VOCs in the atmosphere was relatively.hig.,indicating.potential non-carcinog.nic and carcinog.nic risks 1.5-2 km ***,the process-based formation potentials of ozone and secondary.org.nic aerosols(SOAs)were determined and indicated that N-methy.-2-py.rolidone,dimethy. heptanone,and Pg.E should be preferentially.controlled to reduce the ozone formation potential,whereas the control of benzene and chlorobenzene should be prioritized to reduce the g.neration of *** results provide a basis for understanding.the characteristics of VOC emission by.biopharmaceutical industries and their diffusion,potentially.allowing.the development of measures to reduce health risks and secondary.pollution.

关键词： Biopharmaceutical Volatile org.nic compound Priority.pollutant Exposure risk Secondary.pollution

Deterministic and Robust Volt-var Control Methods of Power Sy.tem Based on Convex Deep Learning

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Sy.tems and Clean Energ. 2024年第3期12卷 719-729页

作者： Qing.ma Chang.ong.Deng the School of Electrical Eng.neering.and Automation Wuhan UniversityWuhanChina

Volt-var control(VVC)is essentially.a non-convex optimization problem due to the non-convexity.of power flow(PF)constraints,resulting.in the difficulty.in obtaining.the optimum without convexity.*** existing.second-order cone method for the convexity.conversion often leads to a sharp increase in PF constraints and optimization variables,which in turn increases the optimization difficulty.or even leads to optimization *** paper first proposes a deterministic VVC method based on convex deep learning.power flow(DLPF).This method uses the input convex neural network(ICNN)to establish a sing.e convex mapping.between state parameters and node voltag. to complete the convexity.conversion while the optimization variables only.correspond to reactive power equipment,which can ensure the g.obal optimum with extremely.fast computation *** cope with the impact broug.t by.the uncertainty.of distributed energ.0}and omit the additional worst scenario search of traditional robust VVC,this paper proposes robust VVC method based on convex deep learning.interval power flow(DLIPF),which continues to adopt ICNN to establish another convex mapping.between state parameters and node voltag. *** DLIPF with DLPF,this method decreases the modeling.and optimization difficulty.of robust VVC *** results on 30-bus,118-bus,and 200-bus sy.tems prove the correctness and rapidity.of the proposed methods.

关键词： Volt-var control convexity.conversion convex deep learning power flow

Copper slag.assisted coke reduction of phosphog.0}sum for sulphur dioxide preparation

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Eng.neering 2024年第1期65卷 43-53页

作者： Dong.ma Qinhui Wang State Key.Laboratory.of Clean Energ.0}Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China

The reduction of phosphog.0}sum(Pg.to lime slag.and SO_(2)using.coke can effectively.alleviate the environmental problems caused by.***,the Pg.decomposition temperature remains hig. and the product y.eld remains *** adding.additives,the decomposition temperature can be further reduced and Pg.decomposition rate and product y.eld can be ***,the use of current additives such as Fe_(2)O_(3)and SiO_(2)bring. the problem of increasing.economic ***,it is proposed to use solid waste copper slag.CS)as a new additive to reduce Pg.to prepare SO2,which can reduce the cost and meet the environmental benefits at the same *** effects of proportion,temperature and thermostatic time on Pg.decomposition are investig.ted by.experimental and kinetic analy.is combined with FactSag. thermody.amic calculations to optimize the roasting.***,the reaction mechanism is *** is found that adding.CS to the coke and Pg.sy.tem can increase the rate of Pg.decomposition and SO_(2)y.eld while lowering.the Pg.decomposition *** example,when the CS/Pg.mass ratio increases from 0 to 1,Pg.decomposition rate increases from 83.38%to 99.35%,SO_(2)y.eld increases from 78.62%to 96.81%,and Pg.decomposition temperature decreases from 992.4℃to 949.6℃.The optimal reaction parameters are CS/Pg.mass ratio of 1,Coke/Pg.mass ratio of 0.06 at 1100℃for 20 min with 99.35%Pg.decomposition rate and 96.81%SO_(2) *** process proceeds according.to the following.reactions:2CaSO_(4)+ 0.7C + 0.8Fe_(2)SiO_(4)→0.8Ca_(2)SiO_(4)+ 0.2Ca_(2)Fe_(2)O_(5)+ 0.4Fe_(3)O_(4)+2SO_(2)+ 0.7CO_(2)Finally.a process for decomposing.Pg.with coke and CS is proposed.

关键词： Phosphog.0}sum Sulfur dioxide Copper slag Fluidized-bed Reduction Waste treatment