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Surface diffraction beamline at the SSRF

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Nuclear Science and Techniques 2024年第7期35卷 47-57页

作者： Yue-Liang gu Xu Zheng Xing-Min Zhang Bin Zhao guang-Zhi Yin Da-Ming Zhu Yuan-he Sun Xing-Yu Gao xiao-Long Li Shanghai Advanced Research Institute Chinese Academy of Sciences239 Zhangheng RoadPudong DistrictShanghai201204China

BL02U2 of the Shanghai Synchrotron Radiation Facility is a surface diffraction beamline with a photon flux of 5.5×10^(12) photons/s at 10 keV and a beam size of 160µm×80µm at the sample *** is dedicated to studying surfaces(solid-vacuum,solid-gas)and interfaces(solid-solid,solid-liquid,and liquid-liquid)in nanoscience,condensed matter,and soft matter systems using various surface scattering techniques over an energy range of 4.8-28 keV with transmission and reflection ***,BL02U2 has a high energy resolution,high angular resolution,and low beam divergence,which can provide excellent properties for X-ray diffraction experiments,such as grazing incident X-ray diffraction,X-ray reflectivity,crystal truncation rods,and liquid X-ray *** of in situ environments can also be provided for the samples *** paper describes the setup of the new beamline and its applications in various fields.

关键词： Surface and interface Beamline Surface diffraction Microstructure

A new modeling scheme for powered parafoil unmanned aerial vehicle platforms: Theory and experiments

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Chinese Journal of Aeronautics 2019年第11期32卷 2466-2479页

作者： Bingbing LI Yuqing he Jianda HAN Jizhong xiao State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China University of Chinese A cademy of Sciences Beijing 100049China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110016China College of Artificial Intelligence Nankai UniversityTianjin 300350China The City College City University of New YorkNew York 10031USA

A novel framework is established for accurate modeling of Powered Parafoil Unmanned Aerial Vehicle(PPUAV). The model is developed in the following three steps: obtaining a linear dynamic model, simplifying the model structure, and estimating the model mismatch due to model variance and external disturbance factors. First, a six degree-of-freedom linear model, or the structured model, is obtained through dynamic establishment and linearization. Second, the data correlation analysis is adopted to determine the criterion for proper model complexity and to simplify the structured model. Next, an active model is established, combining the simplified model with the model mismatch estimator. An adapted Kalman filter is utilized for the real-time estimation of states and model mismatch. We finally derive a linear system model while taking into account of model variance and external disturbance. Actual flight tests verify the effectiveness of our active model in different flight scenarios.

关键词： Active model Data correlation analysis Model complexity Powered parafoil State estimation Unmanned aerial vehicle(UAV)

WEB-BASED VIRTUAL CNC MACHINE MODELING AND OPERATION

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Chinese Journal of Mechanical Engineering 2007年第6期20卷 109-113页

作者： he Hanwu WU Yueming gu Yaoda LU Yongming Faculty of Electromechanical Engineering Guangdong University of Technology Guangzhou 510090 China

A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed. Firstly, the system framework and a rapid modeling method of CNC machine tool are studied under the virtual environment based on PolyTrans and CAD software. Then, a new method is proposed to enhance and expand the interactive ability of virtual reality modeling language（VRML） by attaining communication among VRML, JavaApplet, JavaScript and Html so as to realize the virtual operation for CNC machine tool. Moreover, the algorithm of material removed simulation based on VRML Z-map is presented. The advantages of this algorithm include less memory requirement and much higher computation. Lastly, the CNC milling machine is taken as an illustrative example for the prototype development in order to validate the feasibility of the proposed approach.

关键词： Virtual reality CNC machine tools Machining simulation Virtual reality modeling language (VRML) Virtual operation

Liposomal codelivery of inflammation inhibitor and collagen protector to the plaque for effective anti-atherosclerosis

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Chinese Chemical Letters 2023年第1期34卷 239-244页

作者： xiaotong Li Jiayi gu Qingqing xiao Ying Liu Ping Zhou Lifang Fan Xiulian Zhang Xiang Lu Jun Wu Zhengxia Liu Wei he School of Pharmacy China Pharmaceutical UniversityNanjing 211198China Department of Geriatrics The Second Affiliated HospitalNanjing Medical UniversityNanjing 210011China Key Laboratory for Aging&Disease Nanjing Medical UniversityNanjing 210011China Jiangsu Aosaikang Pharmaceutical Co. Ltd.Nanjing 211112China Department of Respiratory Disease Baoshan BranchShuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 200120China Department of Geriatric Cardiology Jiangsu Provincial Key Laboratory of GeriatricsThe First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China Department of Geriatrics The Affiliated Sir Run Run Hospital of Nanjing Medical UniversityNanjing 211166China

Plaque plays a central role in atherosclerosis(AS)progression,whereas inflammation and destruction of the plaque microenvironment contribute to plaque *** a result,a therapy regime,which combines anti-inflammation and inhibition-degradation of plaque matrix,appears to be a promising strategy to combat ***,we report a p H-sensitive liposome co-loading with the anti-inflammatory agent(oridonin,ORD)and plaque-collagen protector(marimastat)for anti-AS *** was first conjugated with hyaluronic acid(HA)to target the inflammation contributor,pro-inflammatory ***,the conjugate assembled onto the MATT-loaded *** co-loaded system(150 nm)significantly improved pharmacokinetics over the liposomes without anchoring the conjugate and accumulated effectively in the *** preparation administration allowed efficient anti-AS activities in high-fat diet(HFD)-Apoe-/-mice by decreasing the pro-inflammatory cytokine expression in the serum,lessening the lesion area,alleviating the plaque collagen degradation,promoting macrophage polarization from phenotypic M1 to M2,reducing T helper(Th)17 cells(Th17)/T regulatory cells(Tregs)and Th1/Th2 ratio,***,the serum determination in AS patients demonstrated high expression of the inflammatory cytokines,indicating our finding may offer a potential guideline for clinical practice.

关键词： Atherosclerosis Plaque Inflammation Collagen Macrophages Co-delivery Liposomes

Quantum Information Theoretical Analysis of Quantum Secret Sharing

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Chinese Physics Letters 2012年第11期29卷 5-7页

作者： xiao he-Ling guO Wang-Mei WANG xiao State Key Laboratory of Integrated Service Networks Xidian UniversityXi'an 710071

Quantum secret sharing(QSS)schemes are analyzed from an information theoretical perspective centered on the Araki–Lieb *** on this inequality,mathematical characterizations of QSS schemes and quantum error-correcting codes(QECCs)are ***,we present a proof of the relation between QSS schemes and *** information theoretic description of QSS schemes is used to derive the quantum Singleton bound.

关键词： inequality quantum proof

Transport Properties of a Classical One-Dimensional Kicked Billiard Model

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Chinese Physics Letters 2000年第2期17卷 85-87页

作者： CheN he-Sheng WANG Jiao gu Yan Department of Astronomy and Applied Physics University of Science and'Technology of ChinaHefei 230026

We study a classical 1-dimenslonal kicked billiard model and investigate its transport behavior. The roles played by the two system parameters a and K, governing the direction and strength of the kick, respectively, are found to be quite crucial. For the perturbations which are not strong, i.e. Khe phase parameter α changes within its range of interest from -π/2 to π/2, the phase space is in turn characterized by the structure of a prevalently connected stochastic web (-π/2 ≤αhe global stochastic sea (α=π/2). Extensive numerical investigations also indicate that the system's transport behavior in the irregular regions of the phase space for Khe system parameters and the transport coetticient D can be expressed as D≈D0(α)Kf(α).For strong kicks, i.e. K >1, the phase space is occupied by the stochastic sea, and the transport behavior of the system seems to be similar to that of the kicked rotor and independent of α.

关键词： behavior stochastic system

Characteristics of gut microbiota dysbiosis in patients with colorectal polyps

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 13-21页

作者： Xian-Rong Wu xiao-Hong he Yong-Fang Xie School of Life health Information Science and Engineering Chongqing Post and Communications UniversityChongqing 400065China

This editorial,inspired by a recent study published in the World Journal of Gastrointestinal Oncology,covers the research findings on microbiota changes in various *** recurrent colorectal polyps,the abundances of Klebsiella,Parvimonas,and Clostridium increase,while those of Bifidobacterium and Lactoba-cillus *** dysbiosis may promote the formation and recurrence of *** microbial changes have also been observed in colorectal cancer,inflammatory bowel disease,autism spectrum disorder,and metabolic syndrome,indicating the role of increased pathogens and decreased probiotics in these *** the gut microbiota,particularly by increasing probiotic levels,may help prevent polyp recurrence and promote gut *** microbial intervention strategy holds promise as an adjunctive treatment for patients with colorectal polyps.

关键词： Recurrent colorectal polyps gut microbiota dysbiosis Klebsiella Probiotics Intestinal inflammation Microbial intervention strategy

Reactor field reconstruction from sparse and movable sensors using Voronoi tessellation-assisted convolutional neural networks

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Nuclear Science and Techniques 2024年第5期35卷 173-185页

作者： he-Lin Gong Han Li Dunhui xiao Sibo Cheng Paris Elite Institute of Technology Shanghai Jiao Tong UniversityShanghai 200240China School of Mathematical Sciences Tongji UniversityShanghai 200092China Department of Computing Data Science InstituteImperial College LondonLondon SW72AZUK

The aging of operational reactors leads to increased mechanical vibrations in the reactor *** vibration of the incore sensors near their nominal locations is a new problem for neutronic field *** field-reconstruction methods fail to handle spatially moving *** this study,we propose a Voronoi tessellation technique in combination with convolutional neural networks to handle this *** from movable in-core sensors were projected onto the same global field structure using Voronoi tessellation,holding the magnitude and location information of the *** convolutional neural networks were used to learn maps from observations to the global *** proposed method reconstructed multi-physics fields(including fast flux,thermal flux,and power rate)using observations from a single field(such as thermal flux).Numerical tests based on the IAEA benchmark demonstrated the potential of the proposed method in practical engineering applications,particularly within an amplitude of 5 cm around the nominal locations,which led to average relative errors below 5% and 10% in the L_(2) and L_(∞)norms,respectively.

关键词： Voronoi tessellation Field reconstruction Nuclear reactors Reactor physics On-line monitoring

Flavor SU(3)topological diagram and irreducible representation amplitudes for heavy meson charmless hadronic decays:mismatch and equivalence

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Chinese Physics C 2018年第10期42卷 59-68页

作者： xiao-Gang he Wei Wang T.-D.Lee Institute and INPAC Shanghai Key Laboratory for Particle Physics and CosmologyMOE Key Laboratory for Particle PhysicsSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240 Department of Physics National Taiwan UniversityTaipei 106 National Center for Theoretical Sciences TsingHua UniversityHsinchu 300

Flavor SU（3） analysis of B meson charmless hadronic two light pseudoscalar decays can be formulated in two different ways. One is to construct the SU（3） irreducible representation amplitude （IRA） according to effective Hamiltonian transformation properties, and the other is to draw the topological diagrams （TDA）. We first point out that previous analyses of TDA and IRA approaches do not match in several aspects, in particular a few SU（3） independent amplitudes have been overlooked in the TDA approach. This has caused confusions in the past and sometimes resulted in incorrect interpretation of data. We then demonstrate that only if these amplitudes are included, a consistent and unified picture can be obtained. With the new TDA amplitudes, all charmless hadronic decays of heavy meson must have nonzero direct CP symmetries as already predicted by the IRA approach. In addition to their notable impact on CP asymmetry, the new amplitudes are also important to extract new physics information.

关键词： heavy flavor physics flavor SU(3) symmetry topological diagrams