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Parameters Optimization and Performance Evaluation of the Tuned Inerter Damper for the Seismic Protection of Adjacent Building Structures

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工程与科学中的计算机建模(英文) 2024年第1期138卷 551-593页

作者： xiaofang kang Jian Wu Xinqi Wang Shancheng Lei Key Laboratory of Intelligent Underground Detection Technology School of Civil EngineeringAnhui Jianzhu UniversityHefei230601China Chengnan College Changsha University of Science and TechnologyChangsha410015China

In order to improve the seismic performance of adjacent buildings,two types of tuned inerter damper(TID)damping systems for adjacent buildings are proposed,which are composed of springs,inerter devices and dampers in serial or in *** dynamic equations of TID adjacent building damping systems were derived,and the H2 norm criterion was used to optimize and adjust them,so that the system had the optimum damping performance under white noise random *** TID frequency ratio and damping ratio as optimization parameters,the optimum analytical solutions of the displacement frequency response of the undamped structure under white noise excitation were *** results showed that compared with the classic TMD,TID could obtain a better damping effect in the adjacent *** the TIDs composed of serial or parallel,it was found that the parallel TIDs had more significant advantages in controlling the peak displacement frequency response,while the H2 norm of the displacement frequency response of the damping system under the coupling of serial TID was *** the adjacent building composed of two ten-story frame structures as an example,the displacement and energy collection time history analysis of the adjacent building coupled with the optimum design parameter TIDs were carried *** was found that TID had a better damping effect in the full-time range compared with the classic *** paper also studied the potential power of TID in adjacent buildings,which can be converted into available power resources during earthquakes.

关键词： Adjacent buildings tuned inerter damper(TID) H2 norm optimization vibration control energy harvesting

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Chaotic Motion Analysis for a Coupled Magnetic-Flow-Mechanical Model of the Rectangular Conductive Thin Plate

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Computer Modeling in Engineering & Sciences 2023年第11期137卷 1749-1771页

作者： Xinzong Wang xiaofang kang Qingguan Lei School of Civil Engineering Anhui Jianzhu UniversityHefei230601China Key Laboratory of Intelligent Underground Detection Technology Anhui Jianzhu UniversityHefei230601China

The chaotic motion behavior of the rectangular conductive thin plate that is simply supported on four sides by airflow andmechanical external excitation in a magnetic field is *** to Kirchhoff’s thin plate theory,considering geometric nonlinearity and using the principle of virtualwork,the nonlinearmotion partial differential equation of the rectangular conductive thin plate is *** the separate variable method and Galerkin’s method,the system motion partial differential equation is converted into the general equation of the Duffing equation;the Hamilton system is introduced,and the Melnikov function is used to analyze the Hamilton system,and obtain the critical surface for the existence of *** bifurcation diagram,phase portrait,time history response and Poincarémap of the vibration system are obtained by numerical simulation,and the correctness is *** results showthatwhen the ratio of external excitation amplitude to damping coefficient is higher than the critical surface,the system will enter chaotic *** chaotic motion of the rectangular conductive thin plate is affected by different magnetic field distributions and airflow.

关键词： Rectangular conductive thin plate chaotic airflow magnetic field Melnikov function Galerkin’s method

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Review of the Tuned Mass Damper Inerter(TMDI)in Energy Harvesting and Vibration Control:Designs,Analysis and Applications

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2361-2398页

作者： xiaofang kang Qiwen Huang Zongqin Wu Jianjun Tang Xueqin Jiang Shancheng Lei School of Civil Engineering Anhui Jianzhu UniversityHefei230601China Key Laboratory of Intelligent Underground Detection Technology Anhui Jianzhu UniversityHefei230601China Chengnan College Changsha University of Science and TechnologyChangsha410015China

Tuned mass damper inerter(TMDI)is a device that couples traditional tuned mass dampers(TMD)with an inertial *** inertial device produces resistance proportional to the relative acceleration at its two ends through its“inertial”*** to its unique mechanical properties,TMDI has received widespread attention and application in the past twenty *** different configurations are required in different practical situations,TMDI is still active in the research on vibration control and energy harvesting in *** paper provides a comprehensive review of the research status of *** work first examines the generation and important vibration control characteristics of ***,the energy harvesting performance of electromagnetic tuned mass damper inerter(EM-TMDI)is *** work emphasizes the formation of a passive dynamic vibration absorber by coupling traditional TMD with inertial *** paper also summarizes the design and implementation of optimal vibration control and energy harvesting for ***,this paper details the applications of TMDI in the fields of bridges and building ***,this paper summarizes the necessity of research on tuned mass-damper-inertia,the challenges faced currently,and future research directions,such as control of parameters in electromagnetic energy harvesting TMDI systems and low-cost TMDI.

关键词： TMDI EM-TMDI energy harvesting vibration control inertial device

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IPS评分联合ALB、PLT、Lac对肾结石患者术后并发尿源性脓毒血症的预测价值

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国际泌尿系统杂志 2024年第1期44卷 74-78页

作者：康晓芳刘玮袁文兵卞少华张辉刘双宁朱江李颖毅杜乔宝鸡市中心医院感染性疾病科宝鸡721000 宝鸡市人民医院泌尿外科宝鸡721000

目的探讨感染可能性评分(IPS)联合白蛋白(ALB)、血小板计数(PLT)、乳酸(Lac)对肾结石患者经皮肾镜取石术后并发尿源性脓毒血症的预测价值。方法选取2019年1月至2021年2月在宝鸡市中心医院收治的行经皮肾镜取石术治疗的212例肾结石患者... 详细信息

目的探讨感染可能性评分(IPS)联合白蛋白(ALB)、血小板计数(PLT)、乳酸(Lac)对肾结石患者经皮肾镜取石术后并发尿源性脓毒血症的预测价值。方法选取2019年1月至2021年2月在宝鸡市中心医院收治的行经皮肾镜取石术治疗的212例肾结石患者作为研究对象,根据患者术后是否并发尿源性脓毒血症将其分为并发组(24例)和未并发组(188例),对比两组术前、术后IPS评分和ALB、PLT、Lac水平,并采用logistic回归分析法分析肾结石患者经皮肾镜取术后并发尿源性脓毒血症的影响因素,并绘制受试者工作特征(ROC)曲线分析IPS评分联合ALB、PLT、Lac水平对肾结石术后并发尿源性脓毒血症的预测价值。结果并发组的术前尿培养阳性占比、术后IPS评分及Lac水平均高于未并发组,而术后ALB水平及PLT则均低于未并发组(均P<0.05)。经logistic回归分析显示,术前尿培养阳性以及术后IPS评分和Lac水平升高、ALB和PLT水平下降,均是肾结石术后并发尿源性脓毒血症的危险因素(均P<0.05);ROC曲线分析结果显示,术后IPS评分联合ALB、PLT、Lac水平预测肾结石术后并发尿源性脓毒血症的灵敏度、曲线下面积(AUC)均高于单独预测(均P<0.05)。结论术前尿培养阳性以及术后IPS评分和Lac水平升高、ALB和PLT水平下降均是肾结石患者经皮肾镜碎石术后并发尿源性脓毒血症的危险因素。术后IPS评分、ALB、PLT、Lac水平对肾结石术后并发尿源性脓毒血症具有一定的预测价值,但四者联合预测的价值更高。

关键词：肾结石经皮肾镜取石术尿源性脓毒症感染可能性评分乳酸

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Prescribed time control based on the periodic delayed sliding mode surface without singularities

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Science China(Information Sciences) 2024年第7期67卷 256-270页

作者： Bin ZHOU Yi DING kang-kang ZHANG Guang-Ren DUAN Center for Control Theory and Guidance Technology Harbin Institute of Technology

In this paper, nonsingular prescribed-time control is studied based on periodic delayed sliding mode surfaces. Different from the existing sliding mode control, where either singularity problems may appear or the convergence time depends on the initial state, the proposed sliding mode control approaches can achieve prescribed-time convergence without singularity. The proposed nonsingular sliding mode control approaches can be applied to both second-order and high-order nonlinear systems with prescribed-time convergence. As applications of the proposed sliding mode control approaches, the control of hypersonic vehicle systems is revisited. Numerical simulations on the nonlinear model of the hypersonic vehicle system show the effectiveness of the proposed methods.

关键词： prescribed-time control smooth periodic delayed feedback sliding mode control high-order nonlinear systems hypersonic vehicle systems

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Progress in the application of polymer fibers in solid electrolytes for lithium metal batteries

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Journal of Energy Chemistry 2024年第5期92卷 26-42页

作者： Junbao kang Nanping Deng Bowen Cheng Weimin kang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China

Solid state lithium metal batteries(SSLMBs)are considered to be one of the most promising battery systems for achieving high energy density and excellent safety for energy storage in the ***,current existed solid-state electrolytes(SSEs)are still difficult to meet the practical application requirements of *** this review,based on the analysis of main problems and challenges faced by the development of SSEs,the ingenious application and latest progresses including specific suggestions of various polymer fibers and their membrane products in solving these issues are emphatically ***,the inherent defects of inorganic and organic electrolytes are pointed ***,the application strategies of polymer fibers/fiber membranes in strengthening strength,reducing thickness,enhancing thermal stability,increasing the film formability,improving ion conductivity and optimizing interface stability are discussed in detail from two aspects of improving physical structure properties and electrochemical ***,the researches and development trends of the intelligent applications of high-performance polymer fibers in SSEs is *** review intends to provide timely and important guidance for the design and development of polymer fiber composite SSEs for SSLMBs.

关键词： Composite solide lectrolytes Polymer fibers Solid-state lithium metal batteries Solid-stateel ectrolytes Nanofiber membranes

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基于课程思政理念的混凝土结构设计原理教学设计

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大学教育 2023年第8期 105-107页

作者：康小方安徽建筑大学土木工程学院安徽合肥230601

文章将课程思政理念融入混凝土结构设计原理课程教学,结合课程思政的内涵与目标,充分挖掘、开发课程育人资源。将典型案例视频以四个专题的形式嵌入课程教学中,形成“价值引领、能力培养、知识传授”相融合的教育教学内容,使学生在潜移... 详细信息

文章将课程思政理念融入混凝土结构设计原理课程教学,结合课程思政的内涵与目标,充分挖掘、开发课程育人资源。将典型案例视频以四个专题的形式嵌入课程教学中,形成“价值引领、能力培养、知识传授”相融合的教育教学内容,使学生在潜移默化中接受良好的思想政治教育,帮助学生树立正确的爱国情怀、职业道德和职业精神。

关键词：混凝土结构设计原理课程思政教学设计教学实施

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Dual-functional poly(2-methyl-2-oxazoline)/poly(2-(dimethylamine)ethyl methacrylate)mixed brushes with switchable protein adsorption and antibacterial properties

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Chinese Journal of Chemical Engineering 2024年第2期66卷 19-30页

作者： kang He Liangyu Zhu Yanmei Wang CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Herein,binary mixed brushes consisting of poly(2-methyl-2-oxazoline)(PMOXA)and poly(2-(dimethylamine)ethyl methacrylate)(PDMAEMA)with different chain lengths were fabricated by successive grafting of NH_(2)-terminated PMOXA and SH-terminated PDMAEMA onto polydopamine-anchored *** mixed-brush coating was characterized by variable-angle spectroscopic ellipsometry,X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy,zeta potential measurements,water contact angle,and atomic force *** mixed brushes showed tunable surface charge,wettability,and surface roughness,depending on the degree of PDMAEMA swelling under varying pH and ionic strength(Ⅰ).Then the adsorption behaviors of pepsin,bovine serum albumin(BSA),γ-globulin,and lysozyme,four very different proteins with regard to isoelectric point,on the mixed brushes coating were studied by using fluorescence microscopy and surface plasmon *** the chain length of PDMAEMA was about twice as long as PMOXA,the mixed brushes not only had high adsorption capacity for pepsin,BSA,and y-globulin but also had a desorption efficiency of 86.9%,87.1%,and 93.5%,*** is explained that electrostatic attraction between the protonated PDMAEMA and positively charged acidic proteins(pepsin and BSA,whose isoelectric points were below the pK_(a) of PDMAEMA)would drive the intensive adsorption(at pH 3,I=10^(-3)mol·L^(-1)for pepsin,and pH 5,I=10^(-5)mol·L^(-1)for BSA),while desorption was dominated by the hydrophilic PMOXA when PDMAEMA was shrinking(at pH 7,I=10^(-1)mol·L^(-1)for pepsin,and pH 9,I=10^(-1)mol·L^(-1)for BSA).Furthermore,the isoelectric precipitation led to the adsorption of neutral protein(γ-globulin,whose isoelectric point was near the pK_a of PDMAEMA)at pH 7,I=10^(-5)mol·L^(-1),while electrostatic repulsion and antifouling PMOXA triggered the desorption of y-globulin at pH 3,I-10^(-1)mol·L^(-1).However,alkaline protein(lysozyme,whose isoelectric point was higher than

关键词： Switchable conformation transition Controllable protein adsorption Mixed brushes Isoelectric point Antibacterial surface

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A new review of single-ion conducting polymer electrolytes in the light of ion transport mechanisms

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Journal of Energy Chemistry 2024年第2期89卷 543-556,I0012页

作者： Yuqi Luo Lu Gao Weimin kang State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China

With the depletion of fossil fuels and the demand for high-performance energy storage devices,solidstate lithium metal batteries have received widespread attention due to their high energy density and safety *** them,the earliest developed organic solid-state polymer electrolyte has a promising future due to its advantages such as good mechanical flexibility,but its poor ion transport performance dramatically limits its performance ***,single-ion conducting polymer electrolytes(SICPEs)with high lithium-ion transport number,capable of improving the concentration polarization and inhibiting the growth of lithium dendrites,have been proposed,which provide a new direction for the further development of high-performance organic polymer *** view of this,lithium ions transport mechanisms and design principles in SICPEs are summarized and discussed in this *** modification principles currently used can be categorized into the following three types:enhancement of lithium salt anion-polymer interactions,weakening of lithium salt anion-cation interactions,and modulation of lithium ion-polymer *** addition,the advances in single-ion conductors of conventional and novel polymer electrolytes are summarized,and several typical highperformance single-ion conductors are enumerated and analyzed in what way they improve ionic conductivity,lithium ions mobility,and the ability to inhibit lithium ***,the advantages and design methodology of SICPEs are summarized again and the future directions are outlined.

关键词： Lithium metal batteries Single-ion conductor Polymer electrolytes Ion transport mechanism Li-ion transport number

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Considerations of advanced aqueous batteries recycling:A perspective

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Journal of Energy Chemistry 2024年第6期93卷 46-54,I0002页

作者： Yun Zhao Yuqiong kang Hao Du Feiyu kang Baohua Li Institute of Materials Research Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina

*** Battery technology,serving as a basis for a rechargeable society,has developed rapidly over a century[1].The progress can be roughly divided into three stages,with the initial two mainly focusing on aqueous battery *** to 1859,research primarily focused on the conceptualization of batteries and the development of primary(non-rechargeable)cells[2].In the subsequent150 years,rechargeable battery technology emerged。

关键词： battery Battery primarily

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