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不同剂量人免疫球蛋白联合阿司匹林治疗小儿川崎病的效果及对血管内皮功能、氧化应激指标的影响

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临床医学研究与实践 2024年第16期9卷 112-116页

作者：成晓燕任永勤渭南市第一医院儿科陕西渭南714000

目的探讨不同剂量人免疫球蛋白联合阿司匹林治疗小儿川崎病的效果。方法选取2020年4月至2022年4月我科收治的60例川崎病患儿,以随机数字表法将其分为对照组和观察组,每组30例。对照组采用1.0 g/(kg·d)人免疫球蛋白联合阿司匹林治疗,观... 详细信息

目的探讨不同剂量人免疫球蛋白联合阿司匹林治疗小儿川崎病的效果。方法选取2020年4月至2022年4月我科收治的60例川崎病患儿,以随机数字表法将其分为对照组和观察组,每组30例。对照组采用1.0 g/(kg·d)人免疫球蛋白联合阿司匹林治疗,观察组采用2.0 g/(kg·d)人免疫球蛋白联合阿司匹林治疗。比较两组的治疗效果。结果观察组的治疗总有效率高于对照组,差异具有统计学意义(P0.05)。结论采用2.0 g/(kg·d)人免疫球蛋白联合阿司匹林治疗小儿川崎病的效果优于1.0 g/(kg·d)人免疫球蛋白,在改善血管内皮功能、氧化应激反应及免疫炎症方面更具优势,且安全性高。

关键词：人免疫球蛋白阿司匹林川崎病血管内皮功能氧化应激

Design and Experimentation of a Novel Separable Vibration-Assisted Stage

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Nanomanufacturing and Metrology 2023年第3期6卷 41-50页

作者： Bowen Song Xiubing Jing Yingying ren yongqin ren Huaizhong Li School of Mechanical Engineering Tianjin UniversityTianjin300354China Key Laboratory of Ocean Observation Technology Tianjin300000China Griffith School of Engineering Gold Coast CampusGriffith UniversitySouthportQLD4222Australia

In this paper,a novel,separable two-degrees-of-freedom stage with high-precision motion and resolution is proposed for the application of vibration-assisted micromilling.A separable design was realized on the basis of the detachable structure of the *** stages with different dimensions and types can be utilized in the devices.A circular-fillet hinge is selected as the flexible unit with a parallel structure to realize output decoupling and reduce the coupling error between the two vibration *** modeling is conducted to explore the static and dynamic characteristics of the *** reveal a good agreement with the finite element simulation result.A series of experiments were conducted to assess the static and dynamic performances of the flexible stage,encompassing tests such as amplitude response,motion trajectory,and coupling *** results of these tests revealed that the designed vibration-assisted system exhibits precise movement capabilities.

关键词： Vibration-assisted machining Micromilling Symmetrically decoupling structure Flexible stage

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浮子式波浪能转换装置的浮子受力分析

天津大学学报（自然科学与工程技术版） 2014年第5期47卷 446-451页

作者：方红伟程佳佳任永琴天津大学电气与自动化工程学院天津300072 国家海洋技术中心天津300112

为提高现有波浪发电系统的稳定性和效率,提出了一种新型的浮子式波浪发电系统,介绍了其具体结构和特点.同时,采用解析法详细分析了波浪能转换装置(WEC)所受的重力、浮力、系链拉力等情况.根据天津波浪特性,对所提出的波浪发电装置进行... 详细信息

为提高现有波浪发电系统的稳定性和效率,提出了一种新型的浮子式波浪发电系统,介绍了其具体结构和特点.同时,采用解析法详细分析了波浪能转换装置(WEC)所受的重力、浮力、系链拉力等情况.根据天津波浪特性,对所提出的波浪发电装置进行了仿真分析.分析结果表明,所设计的波浪能转换装置具有较好的单向周期性稳定输出转矩特性,且其效率较传统的浮子式WEC提高了10%左右.

关键词：波浪能转换装置双动式棘轮受力分析周期性转矩

A FAS approach for stabilization of generalized chained forms: part 1. Discontinuous control laws

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Science China(Information Sciences) 2024年第2期67卷 118-143页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Center for Control Science and Technology Southern University of Science and Technology

In this paper, a type of general nonholonomic systems is proposed, which contains both the Brockett’s two example systems, and their extended n-dimensional chained forms, as special cases. For the stabilization of such systems, a stabilizing controller is proposed based on the fully actuated system(FAS)approach, which is discontinuous at the origin but time-invariant when the open-loop system is time-invariant,and drives the feasible trajectories of the system to the origin exponentially. Furthermore, the proposed FAS approach is also extended to the sub-normal system case and the time-delay system case.

关键词： nonholonomic systems feedback stabilization exponential convergence sub-fully actuated systems time-delay systems

A FAS approach for stabilization of generalized chained forms: part 2. Continuous control laws

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Science China(Information Sciences) 2024年第3期67卷 114-135页

作者： Guang-ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology

In this paper, continuous time-varying stabilizing controllers for the type of general nonholonomic systems proposed and treated in part 1 are designed using the fully actuated system(FAS) approach. The key step is to differentiate the first scalar equation, and by control of the obtained second-order scalar system, a proportional plus integral feedback form for the first control variable is obtained. With the solution to this designed second-order scalar system, the rest equations in the nonholonomic system form an independent time-varying subsystem which is then handled by the FAS approach. The overall designed controller contains an almost arbitrarily chosen design parameter, and is proven to guarantee the uniformly and globally exponential stability of the closed-loop system. The proposed approach is simple and effective,and is demonstrated with a practical example of ship control.

关键词： nonholonomic systems feedback stabilization fully actuated systems Lyapunov stability continuous controllers

Resilient control of flexible hypersonic vehicles against unmatched distributed faults

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Chinese Journal of Aeronautics 2024年第5期37卷 60-70页

作者： Dong ZHAO Wenjing ren School of Artificial Intelligence Anhui UniversityHefei 230601China Key Laboratory of System Control and Information Processing Ministry of EducationShanghai Jiao Tong UniversityShanghai 200240China School of Electrical Engineering and Automation Hefei University of TechnologyHefei 230009China

This paper studies a robust fault compensation and vibration suppression problem of flexible hypersonic *** controlled plant is represented by a cascade system composed of a nonlinear Ordinary Differential Equation(ODE)and an Euler-Bernoulli Beam Equation(EBBE),in which the vibration dynamics is coupled with the rigid dynamics and suffers from distributed faults.A state differential transformation is introduced to transfer distributed faults to an EBBE boundary and a longitudinal dynamics is refined by utilizing T-S fuzzy IF-THEN rules.A novel T-S fuzzy based fault-tolerant control algorithm is developed and related stability conditions are *** robust exponential stability and well-posedness are proved by using the modified l_(0)-semigroup based Lyapunov direct approach.A simulation study on the longitudinal dynamics of flexible hypersonic vehicles effectively verifies the validity of the developed theoretical results.

关键词： Flexible hypersonic vehicles ODE-EBBE cascade Robust exponential stability Unmatched distributed fault compensation Vibration suppression

Progress in modeling and control of probe-and-drogue autonomous aerial refueling

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Chinese Journal of Aeronautics 2024年第5期37卷 6-26,I0001页

作者： Jinrui ren Quan QUAN School of Automation Xi’an University of Posts&TelecommunicationsXi'an 710072China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

By refueling aircraft while they are in flight,aerial refueling is an efficient technique to extend their endurance and *** Aerial Refueling(AAR)is anticipated to be used to complete aerial refueling for unmanned *** are three aerial refueling methods:the Probe-and-Drogue Refueling(PDR)refueling method,the flying-boom refueling method,and the boom-drogue-adapter refueling *** paper considers the PDR approach,the most challenging of the three,because the flexible hose-drogue assembly has fast dynamics and is susceptible to various kinds of winds,which makes the probe docking with the drogue *** is divided into four phases,namely the rendezvous phase,joining phase,refueling phase,and reform phase,with the refueling phase being the most *** controller design faces the greatest challenge during the docking control of the refueling phase since it calls for a high level of safety,precision,and *** a result,the modeling and control issues encountered during the refueling phase are typical and *** fundamental idea of AAR is presented in the paper first,after which the characteristics and requirements of AAR are *** progress in modeling and control techniques for the AAR’s refueling phase is then systematically ***,potential future work for high safety,precision,and efficiency requirements is examined and suggested.

关键词： Aerial refueling Probe-and-drogue refueling Docking Flight controlsystems Unmanned Aerial Vehicles

Nonlocal symmetries,soliton-cnoidal wave solution and soliton molecules to a(2+1)-dimensional modified KdV system

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Communications in Theoretical Physics 2024年第4期76卷 14-21页

作者： Jianyong Wang Bo ren Department of Mathematics and Physics Quzhou UniversityQuzhou 324000China Department of Mathematics Zhejiang University of TechnologyHangzhou 310014China

A(2+1)-dimensional modified KdV(2DmKdV)system is considered from several ***,residue symmetry,a type of nonlocal symmetry,and the Bäcklund transformation are obtained via the truncated Painlevéexpansion ***,the residue symmetry is localized to a Lie point symmetry of a prolonged system,from which the finite transformation group is ***,the integrability of the 2DmKdV system is examined under the sense of consistent tanh expansion ***,explicit soliton-cnoidal wave solutions are ***,abundant patterns of soliton molecules are presented by imposing the velocity resonance condition on the multiple-soliton solution.

关键词： soliton-cnoidal wave solution nonlocal symmetry soliton molecule (2+1)-dimensional modified KdV system

Global Solvability for a Predator-Prey Model with Prey-Taxis and Rotational Flux Terms

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Chinese Annals of Mathematics,Series B 2024年第2期45卷 297-318页

作者： Guoqiang ren Bin LIU School of Mathematics and Statistics Huazhong University of Science and Technology Hubei Key Laboratory of Engineering Modeling and Scientific Computing Huazhong Universityof Science and Technology

In this paper the author investigates the following predator-prey model with prey-taxis and rotational?ux terms■in a bounded domain with smooth *** presents the global existence of generalized solutions to the model... 详细信息

关键词： Predator-prey Prey-taxis Giopal existence Kotational flnux