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construction and performance test of charged particle detector array for MATE

Nuclear Science and Techniques 2024年第8期35卷 92-100页

作者： Xiao‑Bin Li long‑Hui Ru Zhi‑chao Zhang Bing‑Feng Lv Ning‑Tao Zhang Jin‑long Zhang chen‑gui lu Bing‑Shui gao Jun‑Bing Ma Fu‑Shuai Shi Satoru Terashima Xiao‑Dong Xu Zhen Bai Shi‑Wei Xu yan‑yun yang Hooi‑Jin Ong Xiao‑Dong Tang Institute of Modern Physics(IMP) Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Research center for Nuclear Physics Osaka UniversityIbarakiOsaka 567‑0047Japan RIKEN Nishina center WakoSaitama 351‑0198Japan Joint Department for Nuclear Physics Lanzhou University and Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China

A charged particle array named MATE-PA,which serves as an auxiliary detector system for a Multi-purpose Active-target Time projection chamber used in nuclear astrophysical and exotic beam Experiments(MATE),was *** array comprised of 20 single-sided strip-silicon detectors covering approximately 10%of the solid *** detectors facilitated the detection of reaction-induced charged particles that penetrate the active volume of the *** performance of MATE-PA has been experimentally studied using an alpha source and a 36-MeV 14 N beam injected into the MATE chamber on the radioactive ion beam line in Lanzhou(RIBLL).The chamber was filled with a gas mixture of 95%4 He and 5%cO_(2) at a pressure of 500 *** results indicated good separation of light-charged particles using the forward double-layer silicon detectors of *** energy resolution of the Si detectors was deduced to be approximately 1%(σ)for an energy loss of approximately 10 MeV caused by theα*** inclusion of MATE-PA improves particle identification and increases the dynamic range of the kinetic energy of charged particles,particularly that of theαparticles,up to approximately 15 MeV.

关键词： Silicon detector array Active target Time projection chamber

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Inflammatory Factor IL1αInduces Aberrant Astrocyte Proliferation in Spinal cord Injury Through the grin2c/ca^(2+)/caMK2b Pathway

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Neuroscience Bulletin 2024年第4期40卷 421-438页

作者： yu Xia lu Ding changlin Zhang Qi Xu Ming Shi Tianshun gao Feng-Quan Zhou David y.B.Deng Scientific Research center The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen518107China Department of gynecology The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen518107China Pelvic Floor Disorders center The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen518107China Big Data center The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen518107China Sir Run Run Shaw Hospital Zhejiang University School of MedicineHangzhou310016China Orthopaedic and Neurological Repair center The Seventh Affiliated Hospital of Sun Yat-sen UniversityShenzhen518107China

Spinal cord injury(ScI)is one of the most devastating traumas,and the aberrant proliferation of astrocytes usually causes neurological ***,the mechanism underlying astrocyte over-proliferation after ScI is ***2c(glutamate ionotropic receptor type 2c)plays an essential role in cell *** bioinformatic analysis indicated that grin2c and ca^(2+)transport functions were inhibited in astrocytes after *** of grin2c stimulated astrocyte proliferation by inhibiting the ca^(2+)/calmodulin-dependent protein kinase 2b(caMK2b)pathway in *** screening different inflammatory factors,interleukin 1α(IL1α)was further found to inhibit grin2c/ca^(2+)/caMK2b and enhance astrocyte proliferation in an oxidative damage *** of IL1αusing neutralizing antibody resulted in increased grin2c expression and the inhibition of astrocyte proliferation ***,this study suggests that IL1αpromotes astrocyte proliferation by suppressing the grin2c/ca^(2+)/caMK2b pathway after ScI,revealing a novel pathological mechanism of astrocyte proliferation,and may provide potential targets for ScI repair.

关键词： IL1α grin2c Astrocyte Spinal cord injury

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Dynamic Shading and glazing Technologies:Improve Energy,Visual,and Thermal Performance

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Energy and Built Environment 2024年第2期5卷 211-229页

作者： Weixuan lu School of Architecture University of Southern CaliforniaLos AngelesCAUnited States

conventional static glazing sometimes has poor performance in energy,visual,and thermal *** this thesis,a series of simulations of an office building were done to compare the performance of conventional static glazing,exterior static and kinetic shades,dynamic glazing,and dynamic glazing working together with static or kinetic shades as a combinatorial *** thesis introduced a method for designers to make decisions among multiple shading and glazing options.A scoring system was developed to evaluate the overall ***,visual and thermal performance all had the same *** uses included annual Energy Use Intensity(EUI)and peak cooling loads of the hottest day of the *** performance included maximizing daylight and minimizing glare on the fall equinox *** performance included Predicted Mean Vote(PMV)Index which determined thermal comfort based on occupants’sensations and Predicted Percentage of Dissatisfied(PPD)which indicated the levels of thermal discomfort *** prediction was that the combination of dynamic glazing and kinetic shade would have better comprehensive performance and earn higher scores than other options.

关键词： Energy Daylight Thermal comfort Electrochromic glass Kinetic shades

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Phenomenology of heavy neutral gauge boson at muon collider

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Science china(Physics,Mechanics & Astronomy) 2024年第3期67卷 60-79页

作者： Zongyang lu Honglei Li Zhi-long Han Zong-guo Si Liuxin Zhao School of Physics and Technology University of JinanJinan 250022China School of Physics Shandong UniversityJinan 250100China

Heavy neutral gauge boson Z' is proposed in many new physics *** has rich phenomena at the future muon *** study the properties of Z' boson with the process of μ^(+)μ^(-)→qq,μ^(+)μ^(-)→l^(+)l^(-),μ^(+)μ^(-)→ ZH and μ^(+)μ^(-)→ W^(+)W^(-).The discrepancy of Z' coupling to different types of particles can be shown in the cross section distributions around the resonance peak of various decay *** distributions of the final quark or lepton in μ^(+)μ^(-)→qq/l^(+)l^(-)process are sensitive to the parameters such as mass of Z' and the Z-Z' mixing *** interaction of new gauge boson coupling to the standard model gauge particles and Higgs boson are also studied through μ^(+)μ^(-)→ ZH→l^(+)l^(-)bb and μ^(+)u^(-)→ W^(+)W^(-)→l^(+)l^(-)v_(l)v_(l).The cross section and the final particles' angular distributions with the contribution of Z' boson differ from those processes with only standard model particles.A forward-backward asymmetry defined by the angular distribution is provided to show the potential of searching for new physics at the muon ***,the beam polarization with certain value can effectively enlarge the forward-backward asymmetry.

关键词： Z′boson muon collider new physics

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The joint knowledge reasoning model based on knowledge representation learning for aviation assembly domain

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Science china(Technological Sciences) 2024年第1期67卷 143-156页

作者： LIU PeiFeng QIAN lu lu Hu XUE Lei ZHAO XingWei TAO Bo State Key Laboratory of Digital Manufacturing Equipment and Technology Department of MechanicalHuazhong University of Science and TechnologyWuhan 430074China School of Transportation and Logistics Engineering Wuhan University of Technology(WHUT)Wuhan 430063China Shanghai Aircraft Manufacturing co. Ltd.Shanghai 201324China

Knowledge graph technology is widely applied in the domain of general knowledge reasoning with an excellent *** fine-grained professional fields,professional knowledge graphs can provide more accurate information in practical industrial *** on an aviation assembly domain-specific knowledge graph,the article constructs a joint knowledge reasoning model,which combines a named entity recognition model and a subgraph embedding learning *** performing knowledge reasoning tasks,the two models vectorize entities,relationships and entity attributes in the same space,so as to share parameters and optimize learning *** knowledge reasoning model,which provides intelligent question answering services,is able to reduce the assembly error rate and improve the assembly *** system can accurately solve general knowledge reasoning problems in the assembly process in actual industrial scenarios of general assembly and component assembly under interference-free ***,this paper compares the proposed knowledge reasoning model based on knowledge representation learning and the question-answering system based on large-scale pre-trained *** the application scenario of system functional testing in general assembly,the joint model attains an accuracy rate of 95%,outperforming gPT with 78%accuracy and enhanced representation through knowledge integration with 71%accuracy.

关键词： intelligent manufacturing knowledge graph aviation assembly knowledge representation knowledge-based question an-swering

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Mechanism of Primary Frequency Regulation for Battery Hybridization in Hydropower Plant

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cSEE Journal of Power and Energy Systems 2024年第5期10卷 2127-2137页

作者： yiwen Liao Weijia yang Zhecheng Wang yifan Huang c.y.chung State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Battery hybridization in hydropower plants is a hydropower flexibility enhancement technology innovation that can potentially expand hydropower’s contributions to the grid,but its fundamental characteristics and influencing mechanisms are still *** this paper,primary frequency regulation(PFR)performance and the mechanism of this new technology are studied.A battery hybridized hydropower plant(BH-HPP)model,based on a field-measured-data-based hydropower plant(HPP)model and a verified battery simplified model,is *** of system stability and dynamics is undertaken for three different battery control strategies by root locus and participation factor *** to conventional HPPs,analysis results theoretically reveal BH-HPP can not only accelerate system regulation rapidity but also effectively enlarge HPP stability region during PFR *** domain simulation verifies the results and further shows synthetic control has better performance among introduced ***,initial design ranges of control parameters considering battery capacity and a renewable energy source scenario case are also *** work could provide theoretical support for flexibility enhancement solutions for hydropower systems.

关键词： Battery hybridization dynamic response hydropower plant primary frequency regulation stability

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Evaluation method for electromagnetic interference complexity of high voltage switch based on feature extraction and gcc-gRU network

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High Voltage 2024年第3期9卷 749-761页

作者： Wenchao lu Jiandong Duan Lin cheng Jiangping lu Jiaxin Tao Jianning yin School of Electrical Engineering Xi'an University of TechnologyXi'anChina Power Research Institute of State grid Shaanxi Electric Power co. LtdXi'anChina

When some new-type sensors are subjected electromagnetic interference(EMI),the traditional standard can no longer serve as the guidance for their EMI ***,it is necessary to evaluate the complexity of the new sensing equipment's suffering from electromagnetic interference.A hybrid method of feature extraction and complexity evaluation of Electromagnetic Interference signals based on generalised correntropy criterion(gcc)is ***,a variational mode decomposition al-gorithm for adaptive extraction of decomposed signals is constructed using gcc,and generalised S-transform is used for processing and ***,according to the time-frequency space model,a new quantitative evaluation criterion interference factor is proposed,which overcomes the shortcomings of the traditional qualitative classification and the inability to solve the cross classification of ***,the gated Recurrent Unit is introduced,and the gcc-gRU evaluation model with gcc as the loss function is *** authors conduct EMI tests and measured signal eval-uation with Medium Voltage and High Voltage switches,and the results show that the method proposed is correct and effective.

关键词： complexity criterion network

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A flexible multiscale algorithm based on an improved smoothed particle hydrodynamics method for complex viscoelastic flows

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Applied Mathematics and Mechanics(English Edition) 2024年第8期45卷 1387-1402页

作者： Jinlian REN Peirong lu Tao JIANg Jianfeng LIU Weigang lu college of Mathematical Science Yangzhou UniversityYangzhou 225002Jiangsu ProvinceChina college of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225002Jiangsu ProvinceChina

Viscoelastic flows play an important role in numerous engineering fields,and the multiscale algorithms for simulating viscoelastic flows have received significant attention in order to deepen our understanding of the nonlinear dynamic behaviors of viscoelastic ***,traditional grid-based multiscale methods are confined to simple viscoelastic flows with short relaxation time,and there is a lack of uniform multiscale scheme available for coupling different solvers in the simulations of viscoelastic *** this paper,a universal multiscale method coupling an improved smoothed particle hydrodynamics(SPH)and multiscale universal interface(MUI)library is presented for viscoelastic *** proposed multiscale method builds on an improved SPH method and leverages the MUI library to facilitate the exchange of information among different solvers in the overlapping *** test the capability and flexibility of the presented multiscale method to deal with complex viscoelastic flows by solving different multiscale problems of viscoelastic *** the first example,the simulation of a viscoelastic Poiseuille flow is carried out by two coupled improved SPH methods with different spatial *** effects of exchanging different physical quantities on the numerical results in both the upper and lower domains are also investigated as well as the absolute errors in the overlapping *** the second example,the complex Wannier flow with different Weissenberg numbers is further simulated by two improved SPH methods and coupling the improved SPH method and the dissipative particle dynamics(DPD)*** numerical results show that the physical quantities for viscoelastic flows obtained by the presented multiscale method are in consistence with those obtained by a single solver in the overlapping ***,transferring different physical quantities has an important effect on the numerical results.

关键词： multiscale method improved smoothed particle hydrodynamics(SPH) dissipative particle dynamics(DPD) multiscale universal interface(MUI) complex viscoelastic flow

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Structure engineering of cathode host materials for Li-S batteries

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Rare Metals 2024年第4期43卷 1370-1389页

作者： Jia-Jun long Hua yu Wen-Bo Liu School of New Energy and Materials Southwest Petroleum UniversityChengdu610500China School of Mechanical Engineering Sichuan UniversityChengdu610065China

Although lithium-sulfur batteries are one of the favorable candidates for next-generation energy storage devices,a few key challenges that have not been addressed have limited its *** challenges include lithium dendrite growth in the anode side,volume change of the active material,poor electrical conductivity,dissolution and migration of poly sulfides,and slow rate of solid-state reactions in the cathode *** the electrochemical performance of lithium-sulfur batteries is greatly affected by the design of the cathode host material,it has also been widely discussed in addressing the abovementioned *** this paper,three design ideas of cathode host materials in terms of microstructure,crystal structure and electronic structure are introduced and ***,the current progress of these three structural design strategies and their effects on the electrochemical performance of lithium-sulfur batteries are discussed in ***,future directions in the structural design of cathode materials for lithium-sulfur batteries are discussed and further perspectives are provided.

关键词： Lithium-sulfur batteries Structure engineering cathode Host materials

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Rotating effects on the photoionization cross-section of a 2D quantum ring

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communications in Theoretical Physics 2024年第10期76卷 153-159页

作者： carlos Magno O Pereira Frankbelson dos S Azevedo luís Fernando c Pereira Edilberto O Silva Departamento de Física Universidade Federal do Maranh?o

In this article, we investigate the nonrelativistic quantum motion of a charged particle within a rotating frame, taking into account the Aharonov–Bohm(AB) effect and a uniform magnetic field. Our analysis entails the derivation of the equation of motion and the corresponding radial equation to describe the system. Solving the resulting radial equation enables us to determine the eigenvalues and eigenfunctions, providing a clear expression for the energy levels. Furthermore,our numerical analysis highlights the substantial influence of rotation on both energy levels and optical properties. Specifically, we evaluate the photoionization cross-section with and without the effects of rotation. To elucidate the impact of rotation on the photoionization process of the system, we present graphics that offer an appealing visualization of the intrinsic nature of the physics involved.

关键词： Aharonov-Bohm effect photoionization cross-section quantum ring rotating effect

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