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World Journal of Diabetes 2025年第1期16卷 217-221页

作者： Le-Rong Liu Yuan-Yuan Luo Pei-Zhu Su Cong Zhang zhao-tao Li Department of Endocrinology and Metabolism Nanfang HospitalSouthern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Endocrinology Chongqing University Three Gorges HospitalChongqing 404100China Chongqing Municipality Clinical Research Center for Endocrinology and Metabolic Diseases Chongqing University Three Gorges HospitalChongqing 404100China Department of Endocrinology The Second Affiliated HospitalChongqing Medical UniversityChongqing 400013China Department of Gastroenterology The First People's Hospital of FoshanFoshan 528000Guangdong ProvinceChina

In this article,we review the study by Jin et al,which examined the role of intestinal glucagon-like peptide-1(GLP-1)in counterregulatory responses to hypoglycemia in patients with type 1 diabetes mellitus(T1DM).With the global rise of T1DM,there is an increased burden on society and healthcare *** to insulin therapy and islet dysfunction,T1DM patients are highly vulnerable to severe hypoglycemia,a leading cause of *** healthy individuals,counterregulatory mechanisms restore blood glucose during hypoglycemia,but repeated episodes impair these *** et al demonstrated that overexpression of GLP-1 attenuates the sympathetic-adrenal reflex and disrupts the secretion of counterregulatory hormones such as glucagon during hypoglycemia,leading to counterregulatory *** findings highlight the critical role of GLP-1 in the impaired counterregulatory response to hypoglycemia in T1DM patients and provide new insights into the potential application of GLP-1-related therapies in T1DM patients.

关键词： Glucagon-like peptide-1 Impaired counterregulation Type 1 diabetes mellitus Sympathetic-adrenal reflex Glucagon

Study on the X-Ray Re-brightening Signature of GRB 220117A

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Research in Astronomy and Astrophysics 2023年第11期23卷 118-124页

作者： Li-tao zhao School of Mathematics and Science Hebei GEO UniversityShijiazhuang 050016China

The Swift/XRT detected the X-ray afterglow of long burst GRB 220117A,which began to rebrighten 300 s after triggering and followed a single power-law decay segment after thousands of seconds of the orbital observation *** segment is different from the shallow decay segment(plateau)and flare,and may belong to a giant X-ray *** investigated this segment by the fall-back accretion model and found that the model can interpret this segment with reasonable parameter *** this physical model scenario,the fall-back accretion rate reaches a peak value~1.70×10~(-5)M_⊙s~(-1)around 300 s in the central engine frame,which is compatible with the late mass supply rate of some low-metallicity massive progenitor *** initial black hole(BH)spin is a_0=0.64_(-0.26)~(+0.24)and implies that this re-brightening signature requires a larger BH *** total accretion mass during the fall-back process is M_(acc)=(3.09±0.02)×10~(-2)M_⊙.The jet energy from the fall-back accretion is(9.77±0.65)×10~(52)erg,with a ratio of 0.066 to the isotropic-equivalent radiation energies of the GRB prompt phase in the 1-10~4 keV *** fall-back radius r_p corresponding to the peak time of fall-back t_p is(3.16±0.05)×10~(10)cm,which is consistent with the typical radius of Wolf-Rayet *** summary,our results provide additional support for the origin of the long burst from the core collapse of Wolf-Rayet stars,and its late central engine activity is likely due to the fall-back accretion process.

关键词： accretion accretion disks black hole physics (stars:)gamma-ray burst:general

Fuzzy Static Output Feedback H_∞ Control for Nonlinear Systems Subject to Parameter Uncertainties

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Journal of Systems Science & Complexity 2018年第2期31卷 343-371页

作者： zhao tao DIAN Songyi School of Electrical Engineering and Information Sichuan University

This study is concerned with the stabilization issue of nonlinear systems subject to parameter uncertainties. An interval type-2 T-S fuzzy model is used to represent the nonlinear systems subject to parameter uncertainties. An interval type-2 fuzzy static output feedback controller is designed to synthesize the interval type-2 T-S fuzzy systems. The membership-function-dependent stability conditions are derived by utilizing the information of upper and lower membership functions. The proposed stability conditions are presented in the form of linear matrix inequalities（LMIs）. LMI-based stability conditions for interval type-2 fuzzy static output feedback H_∞ control synthesis are also *** simulation examples are given to show the superiority of the proposed approach.

关键词： Interval type-2 fuzzy controller parameter uncertainties static output feedback control T-S fuzzy systems.

A New Class for Large Sets of Almost Hamilton Cycle Decompositions

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Acta Mathematicae Applicatae Sinica 2017年第4期33卷 865-870页

作者： Hong-tao zhao School of Mathematics and Physics North China Electric Power University Beijing 102206 China

A k-cycle system of order v with index A, denoted by CS（v, k, λ）, is a collection A of k-cycles （blocks） of Kv such that each edge in Kv appears in exactly λ blocks of A. A large set of CS（v, k, λ）s is a partition of the set of all k-cycles of Kv into CS（v, k, λ）s, and is denoted by LCS（v, k, λ）. A （v - 1）-cycle in K, is called almost Hamilton. The completion of the existence problem for LCS（v, v- 1,λ） depends only on one case： all v ≥ 4 for λ=2. In this paper, it is shown that there exists an LCS（v,v - 1,2） for all v ≡ 2 （mod 4）, v ≥ 6.

关键词： large set cycle system almost Hamilton cycle decomposition symmetric group complete auto-morphism group

Algebraic Method‑Based Point‑to‑Point Trajectory Planning of an Under‑Constrained Cable‑Suspended Parallel Robot with Variable Angle and Height Cable Mast

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Chinese Journal of Mechanical Engineering 2020年第4期33卷 45-62页

作者： tao zhao Bin Zi Sen Qian Jiahao zhao School of Mechanical Engineering Hefei University of TechnologyHefei 230009China Chemical Science and Engineering College North Minzu UniversityYinchuan 750021China

To avoid impacts and vibrations during the processes of acceleration and deceleration while possessing flexible working ways for cable-suspended parallel robots(CSPRs),point-to-point trajectory planning demands an under-constrained cable-suspended parallel robot(UCPR)with variable angle and height cable mast as described in this *** end-effector of the UCPR with three cables can achieve three translational degrees of freedom(DOFs).The inverse kinematic and dynamic modeling of the UCPR considering the angle and height of cable mast are *** motion trajectory of the end-effector comprising six segments is *** connection points of the trajectory segments(except for point P3 in the X direction)are devised to have zero instantaneous velocities,which ensure that the acceleration has continuity and the planned acceleration curve achieves smooth *** trajectory is respectively planned using three algebraic methods,including fifth degree polynomial,cycloid trajectory,and double-S velocity *** results indicate that the trajectory planned by fifth degree polynomial method is much closer to the given trajectory of the *** simulation and experiments are accomplished for the given trajectory based on fifth degree polynomial *** the points where the velocity suddenly changes,the length and tension variation curves of the planned and unplanned three cables are compared and *** OptiTrack motion capture system is adopted to track the end-effector of the UCPR during the *** effectiveness and feasibility of fifth degree polynomial planning are validated.

关键词： Under-constrained cable-suspended parallel robot Variable angle and height cable mast Inverse kinematic and dynamic modeling Algebraic method Point-to-point trajectory planning

Active event-driven reliable defense control for interconnected nonlinear systems under actuator faults and denial-of-service attacks

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Science China(Information Sciences) 2022年第6期65卷 155-171页

作者： Bin GUO Songyi DIAN tao zhao College of Electrical Engineering Sichuan University

This study investigates the reliable control design for a class of interconnected nonlinear systems subjected to actuator faults, disturbances, and denial-of-service(DoS) attacks. DoS attacks are carried out in both sensor and controller channels. An integrated event-observer-based security sliding mode fault-tolerant control approach is presented to defend against DoS attacks and compensate for faults and *** be more specific, the fuzzy logic system(FLS) theory is used to approximate the unknown nonlinear component first. Using the output measurement and sensor channel triggered output information, an FLS aided nonlinear estimator is put forward, in which the faults and disturbances are reconstructed. Then, to achieve the trajectory tracking purpose in the presence of DoS attacks, actuator faults, and disturbances, an adaptive sliding mode manifold is established, based on which an event-driven mechanism is established and a reliable controller is designed. In the controller scheme, the fault compensation and disturbance rejection mechanisms are also included synchronously. The tracking ability is analyzed using the Lyapunov method and the FLS theory, followed by applications to an interconnected power network system and an interconnected inverted pendulum system to demonstrate the applicability of the proposed method.

关键词： interconnected nonlinear system actuator fault DoS attack disturbance fault-tolerant control event-driven control

Applications of chemical imaging techniques in paleontology

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National Science Review 2019年第5期6卷 1040-1053页

作者： Yanhong Pan Liang Hu tao zhao CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of Sciences

Chemical imaging techniques, based on a combination of microscopy and spectroscopy, are designed to analyse the composition and spatial distribution of heterogeneous chemical complexes within a *** the last few decades, it has become an increasingly popular tool for characterizing trace elements,isotopic information and organic biomarkers(molecular biosignatures) found in ***, we introduce the analytical principle of each technique and the interpretation of the chemical signals, followed by a review of the main applications of these techniques in *** also demonstrate that each technique is associated with pros and cons, and the current limitations and obstacles associated with the use of each specific technique should be taken into account before being applied to fossil ***, we propose that, due to the rapid advances in the available technology and overall trends towards more multi-disciplinary studies in paleontology, chemical imaging techniques can be expected to have broader applications in paleontology in the near future.

关键词： trace elements isotopic information organic biomarkers fossil materials limits and obstacles

Cherenkov terahertz radiation from Dirac semimetals surface plasmon polaritons excited by an electron beam

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Chinese Physics B 2020年第3期29卷 176-180页

作者： tao zhao Zhenhua Wu Terahertz Research Center School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 610054China

We demonstrate a physical mechanism for terahertz(THz) generation from surface plasmon polaritons(SPPs). In a structure with a bulk Dirac semimetals(BDSs) film deposited on a dielectric substrate, the energy of the asymmetric SPP mode can be significantly enhanced to cross the light line of the substrate due to the SPP-coupling between the interfaces of the film. Therefore, the SPPs can be immediately transformed into Cherenkov radiation without removing the wavevector mismatch. Additionally, the symmetric SPP mode can also be dramatically lifted to cross the substrate light line when a buffer layer with low permittivity relative to the substrate is introduced. In this case, dual-frequency THz radiation from the two SPP modes can be generated simultaneously. The radiation intensity is significantly enhanced by over two orders due to the field enhancement of the SPPs. The radiation frequency can be tuned in the THz frequency regime by adjusting the beam energy and the chemical potential of the BDSs. Our results could find potential applications in developing room temperature, tunable, coherent, and intense THz radiation sources to cover the entire THz band.

关键词： terahertz radiation sources surface plasmon polaritons Cherenkov radiation

Seismic damage of mountain tunnels during the 5.12 Wenchuan earthquake

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Journal of Mountain Science 2016年第11期13卷 1958-1972页

作者： YU Hai-tao CHEN Jun-tao YUAN Yong zhao Xu Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of Technology Beijing 100124 China

A number of mountain tunnels suffered significant damage to various extent during the 2008 Wenchuan earthquake in *** ranging from small to heavy cracking was observed both at the portal and inside the tunnels,while some sections close to the faults completely collapsed.A summary of qualitative data collected from reports and papers is presented regarding the behavior of the 55 mountain tunnels near the epicenter during the *** on the seismic investigation and data collection of mountain tunnels,the tunnel damage is classified into six most common damage models involving cracking,spalling,shear failure,dislocation,pavement uplift and *** study and discussion are then carried out on the damage *** order to examine the influencing factors of the damage magnitude of the mountain tunnels,the correlations between epicentral distance,earthquake intensity,overburden depth,geological condition and damage levels are *** relationships between earthquake parameters and different damagemodels are developed and ***,suggestions are provided to improve the seismic resistance of mountain tunnels.

关键词： Wenchuan earthquake Mountain tunnels Damage model Influencing factors Seismic capacity

Synchronization of complex switched delay dynamical networks with simultaneously diagonalizable coupling matrices

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控制理论与应用（英文版） 2008年第4期6卷 351-356页

作者： tao LIU Jun zhao Key Laboratory of Integrated Automation of Process Industry Northeastern University Shenyang Liaoning 110004 China

This paper studies local exponential synchronization of complex delayed networks with switching topology via switched system stability theory. First, by a common unitary matrix, the problem of synchronization is transformed into the stability analysis of some linear switched delay systems. Then, when all subnetworks are synchronizable, a delay-dependent sufficient condition is given in terms of linear matrix inequalities （LMIs） which guarantees the solvability of the synchronization problem under an average dwell time scheme. We extend this result to the case that not all subnetworks are synchronizable. It is shown that in addition to average dwell time, if the ratio of the total activation time of synchronizable and non-synchronizable subnetworks satisfy an extra condition, then the problem is also solvable. Two numerical examples of delayed dynamical networks with switching topology are given, which demonstrate the effectiveness of obtained results.

关键词： Exponential synchronization Complex dynamical network Switching topology Switched systems Av-erage dwell time Coupling delays Simultaneously diagonalizable matrices