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Feasibility study of cosmic-ray componentsmeasurement by using a scintillating fiber tracker in space

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Radiation Detection Technology and Methods 2021年第3期5卷 389-403页

作者： Jun-jing Wang Xin wu Ming Xu Chiara Perrina Philipp Azzarello Franck Cadoux Yannick Favre Daniel La Marra bo-bing wu Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Nuclear and Particle Physics University of Geneva1211 Geneva 4Switzerland University of Chinese Academy of Sciences Beijing 100049China Institute of Physics École Polytechnique Fédérale de Lausanne(EPFL)1015LausanneSwitzerland

Purpose The application of traditional silicon strip detectors in space experiments often suffers from heat and power consumption limitations when a large area has to be ***,a scintillating fiber detector with SiPM readout was proposed and adopted by ground high-energy *** excellent performance in track measurement and mechanical flexibility makes it a prospective candidate for large-area tracking detectors in the next-generation space *** paper mainly focuses on its performance in cosmic-ray charge *** A fast Geant4 simulation for a single tracker module was developed and compared with the beam test *** non-uniformity of the detector response was ***,a full tracker simulation using a variety of typical cosmic ray nuclei was *** performance of a fiber tracker with multiple layers was *** and conclusion The comparison between the simulation results and the beam test data of protons and helium nuclei shows a good *** non-uniformity study reveals the strong dependence of the detector signal on the position and inclination angle of the incident ***,a corresponding correction algorithm was developed and applied in the following data *** preliminary result shows that the charge measurement capability of the fiber tracker composed of 9 XY superlayers is comparable to that of the AMS-02 inner tracker,which consists of 7 layers of double-sided silicon micro-strip *** paper discusses the feasibility of using fiber trackers to measure cosmic ray charges and provide a guide for the optimization of detector design.

关键词： Fiber tracker SiPM Charge measurement Cosmic-ray Simulation

RNF187 governs the maintenance of mouse GC-2 cell development by facilitating histone H3 ubiquitination at K57/80

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Asian Journal of Andrology 2024年第3期26卷 272-281页

作者： bing-Ya Xu Xiang-Ling Yu Wen-Xin Gao Ting-Ting Gao Hao-Yue Hu Tian-Tian wu Cong Shen Xiao-Yan Huang bo Zheng Yi-bo wu Human Reproductive and Genetic Center Affiliated Hospital of Jiangnan UniversityWuxi 214122China State Key Laboratory of Reproductive Medicine Department of Histology and EmbryologySchool of Basic Medical SciencesNanjing Medical UniversityNanjing 211166China Changzhou Maternal and Child Health Care Hospital Changzhou Medical CenterNanjing Medical UniversityChangzhou 213000China State Key Laboratory of Reproductive Medicine Center for Reproduction and GeneticsSuzhou Municipal HospitalThe Affiliated Suzhou Hospital of Nanjing Medical UniversityGusu SchoolNanjing Medical UniversitySuzhou 215002China

RING finger 187(RNF187),a ubiquitin-ligating(E3)enzyme,plays a crucial role in the proliferation of cancer ***,it remains unclear whether RNF187 exhibits comparable functionality in the development of germline *** investigate thepotential involvement of RNF187 in germ cell development,we conducted interference and overexpression assays using GC-2 cells,a mouse spermatocyte-derived cell *** findings reveal that the interaction between RNF187 and histone H3 increases theviability,proliferation,and migratory capacity of GC-2 ***,we provide evidence demonstrating that RNF187 interactswith H3 and mediates the ubiquitination of H3 at lysine 57(K57)or lysine 80(K80),directly or indirectly resulting in increasedcellular *** is a study to report the role of RNF187 in maintaining the development of GC-2 cells by mediatinghistone H3 ubiquitination,thus highlighting the involvement of the K57 and K80 residues of H3 in the epistatic regulation of *** discoveries provide a new theoretical foundation for further comprehensive investigations into the functionof RNF187 in the reproductive system.

关键词： GC-2 cell histone H3 RNF187 ubiquitination

Almost Periodic Type Group Actions on Compact Quantum Metric Spaces

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Acta Mathematica Sinica,English Series 2024年第2期40卷 568-594页

作者： bo Tao LONG Wei wu College of Mathematics MIIT Key Laboratory of Mathematical Modelling and High Performance Computing of Air VehiclesNanjing University of Aeronautics and AstronauticsNanjing 211106P.R.China School of Mathematical Sciences Shanghai Key Laboratory of Pure Mathematics and Mathematical PracticeEast China Normal UniversityShanghai 200241P.R.China

A compact quantum metric space is a complete order unit space A endowed with a Lipnorm *** give some characterizations of almost periodic type group actions on a compact quantum metric space(A,L)by means of several kinds of subsets of A,its induced equicontinuous actions on several important subsets of the dual Banach space A*,and the Lip-norm L with its induced metric space structures on the state space S(A)of A.

关键词： Lip-norm compact quantum metric space Lipschitz isomorphism almost periodicity Arzela-Ascoli theorem metric set

Novel Adaptive Memory Event-Triggered-Based Fuzzy Robust Control for Nonlinear Networked Systems via the Differential Evolution Algorithm

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1836-1848页

作者： Wei Qian Yanmin wu bo Shen School of Electrical Engineering and Automation Henan Polytechnic UniversityJiaozuo 454000China College of Information Science and Technology Donghua UniversityShanghai 201620China

This article mainly investigates the fuzzy optimization robust control issue for nonlinear networked systems characterized by the interval type-2(IT2)fuzzy technique under a differential evolution *** provide a more reasonable utilization of the constrained communication channel,a novel adaptive memory event-triggered(AMET)mechanism is developed,where two event-triggered thresholds can be dynamically adjusted in the light of the current system information and the transmitted historical *** conditions with less conservative design of the fuzzy imperfect premise matching(IPM)controller are presented by introducing the Wirtinger-based integral inequality,the information of membership functions(MFs)and slack ***,under the IPM policy,a new MFs intelligent optimization technique that takes advantage of the differential evolution algorithm is first provided for IT2 TakagiSugeno(T-S)fuzzy systems to update the fuzzy controller MFs in real-time and achieve a better system control ***,simulation results demonstrate that the proposed control scheme can obtain better system performance in the case of using fewer communication resources.

关键词： Adaptive memory event-triggered(AMET) differential evolution algorithm fuzzy optimization robust control interval type-2(IT2)fuzzy technique.

Dietary selection of commensal protists:expanding host immunity by impacting trans-kindom competition with bacteria

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2344-2346页

作者： bo Li Min wu Huaqiong Li Department of Neonatology The Second Affliated Hospital of Wenzhou Medical University and Yuying Children’s HospitalWenzhou Medical UniversityWenzhouZhejiang 325027China Zhejiang Engineering Research Center for Tissue Repair Materials Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhouZhejiang 325000China

In a recent publication in Cell,1 Elias *** and colleagues identified novel commensal parabasalid protists(***,Parabasalia_sp_1653)with distinct metabolic traits,including diverse succinate excretion and dietary preference,which drives different trans-kingdom competition with specific commensal bacteria and results in divergent small intestine(SI)immune response,highlighting the significance of dietary interventions as a pivotal strategy for maintaining gut health(Fig.1).

关键词： immunity dietary intestine

Arbuscular mycorrhizal fungi and endophytic fungi differentially modulate polyamines or proline of peach in response to soil flooding

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Pedosphere 2024年第2期34卷 460-472页

作者： Shengmin LIANG Yingning ZOU bo SHU Qiangsheng wu Ministry of Education Engineering Research Center of Ecology and Agricultural Use of WetlandHubei Key Laboratory of Waterlogging Disaster and Agricultural Use of WetlandCollege of Horticulture and GardeningYangtze UniversityJingzhou 434025China

Symbiotic fungi are involved in plant flooding tolerance,while the underlying mechanism is not yet *** polyamines(PAs)and proline are also associated with stress tolerance,it is hypothesized that the enhancement of stress resistance by symbiotic fungi is associated with changes in PAs and/or *** aim of this study was to analyze the effect of inoculation with Funneliformis mosseae and Serendipita indica on plant growth,PAs,and proline and the metabolisms in peach(Prunus persica)under ***-week flooding did not affect root colonization frequence of ***,while it promoted root colonization frequence of *** flooding,plants inoculated with *** and *** maintained relatively higher growth rates than uninoculated *** mosseae promoted root ornithine(Orn)contentration and arginine(Arg)and Orn decarboxylase activities under flooding,which promoted putrescine(Put),cadaverine(Cad),and spermidine(Spd)***,*** decreased contentrations of Arg,Orn,and agmatine and Arg decarboxylase activities,thus decreasing PA contentrations under *** were negatively correlated with the expression of PA uptake transporter genes,PpPUT1 and PpPUT2,in *** transporter genes of ***(FmTPO)and ***(SiTPO)were regulated by flooding,of which FmTPO1 was positively correlated with Put,Cad,and Spd,along with positive correlations of Spd with SiTPO1,SiTPO2,and *** flooding,*** decreased proline concentration,while *** increased proline concentration and correlated with expression of a△^(1)-pyrroline-5-carboxylate synthetase gene,*** was thus concluded that *** modulated polyamine accumulation,while *** induced proline accumulation to tolerate flooding.

关键词： △^(1)-pyrroline-5-carboxylate synthetase flooding tolerance Funneliformis mosseae ornithine aminotransferase root colonization Serendipita indica spermidine transporter

A solution using only electromagnetic coils for relative pose control in satellite docking

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Chinese Journal of Aeronautics 2024年第3期37卷 258-281页

作者： Guangzheng RUAN Lijian wu bo WANG Yaobing WANG Runqi HAN College of Electrical Engineering Zhejiang UniversityHangzhou 310012China Beijing Institute of Spacecraft System Engineering Beijing 100094China

This paper proposes an electromagnetic coil topology and its control strategy,which can be incorporated into the electromagnetic docking device to achieve relative pose control in satellite *** target satellite has a main coil;the chaser satellite possesses a main coil of the same size accompanied by six and four evenly arranged secondary coils inside and outside the main coil,*** coil on the target satellite is DC energized,while the currents in the coils of the chaser satellite are *** remove the coupling between the pitch/yaw torque and translational force,the internal and external secondary coils of the chaser satellite interact with the main coil of the target satellite to perform the control of relative pitch/yaw and relative translation,respectively,so relative pose control can be *** torque and force vectors exerted by the secondary coils of the chaser satellite are synthesized onto the pitch and yaw axes of the body *** to their spatial composition relationship,the formulas are proposed,which obtain the magnetic moment vectors of the coils from the set torques and *** controllers regulating pitch/yaw,translation,and distance utilize a three-loop cascaded structure that consists of an outer position loop,a middle velocity loop and an inner current *** control strategy is verified by dynamics simulation.

关键词： Electromagnetic docking 6 degree of freedom Relative pose control Coil array Far field model Motion decoupling

Dissipation-Driven Superradiant Phase Transition of a Two-Dimensional bose-Einstein Condensate in a Double Cavity

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Chinese Physics Letters 2024年第6期41卷 44-48页

作者： bo-Hao wu Xin-Xin Yang Yu Chen Wei Zhang Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices Renmin University of ChinaBeijing 100872China Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education) Renmin University of ChinaBeijing 100872China Graduate School of China Academy of Engineering Physics Beijing 100193China Beijing Academy of Quantum Information Sciences Beijing 100193China

We study superradiant phase transitions in a hybrid system of a two-dimensional bose–Einstein condensate of atoms and two cavities arranged with a tilt *** adjusting the loss rate of cavities,we map out the phase diagram of steady states within a mean field *** is found that when the loss rates of the two cavities are different,superradiant transitions may not occur at the same time in the two cavities.A first-order phase transition is observed between the states with only one cavity in superradiance and both in *** the case that both cavities are superradiant,a net photon current is observed flowing from the cavity with small decay rate to the one with large decay *** photon current shows a non-monotonic dependence on the loss rate difference,owing to the competition of photon number difference and cavity field phase *** findings can be realized and detected in experiments.

关键词： Einstein transitions decay

Thermal and hydrological processes in permafrost slope wetlands affect thermosyphon embankment stability

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Advances in Climate Change Research 2024年第4期15卷 680-694页

作者： bo-Wen TAI Qing-Bai wu Xiao-Ming XU State Key Laboratory of Frozen Soil Engineering Key Laboratory of Cryospheric Science and Frozen Soil EngineeringNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

To ensure the long-term service performance of infrastructure such as railways,highways,airports and oil pipelines built on permafrost slope wetland sites,it is imperative to systematically uncover the long-term heat-water changes of soil in slope wetlands environment under climate *** specifically,considering valuable field data from 2001 to 2019,the long-term heat and water changes in active layers of the slope wetland site along the Qinghai-Xizang Railway(QXR)are illustrated,the effect of thermosyphon measures in protecting the permafrost environment is evaluated,and the influences of climate warming and hydrological effects on the stability of slope wetland embankments are systematically *** permafrost at the slope wetland site is rapidly degrading,demonstrating a reduction in active layer thickness of>3.7 cm per year and a permafrost temperature warming of>0.006℃ per *** thermosiphon embankment developed by QXR has a specific cooling period;thus,to mitigate the long-term impacts of climate warming on the thermal stability of permafrost foundation,it is essential to implement strengthening measures for the thermosiphon embankment,such as adding a crushed-rock layer or sunshade board on the slope of thermosiphon embankment to creating a composite cooling ***-term seasonal groundwater seepage intensifies frost damage to the slope wetland embankment,while long-term seasonal supra-permafrost water and groundwater seepage exacerbates uneven transverse deformation of slope wetland ***-term climate warming and slope effects have altered the surface water and groundwater hydrological processes of slope wetlands,potentially leading to an increased occurrence of slope embankment *** results are crucial for improving our understanding of heat and water variation processes in the active layer of slope wetland sites located in permafrost regions and ensuring long-term service safety for the QXR.

关键词： Heat and water process Active layer Slope wetland Permafrost environment Thermosyphon embankment