检索结果-南通市图书馆

Dual-steering mode based on direct yaw moment control for multi-wheel hub motor driven vehicles:Theoretical design and experimental assessment

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2022年第1期18卷 49-61页

作者： Zheng Zhang Xiao-jun Ma Chun-guang Liu shu-guang wei Department of Weapons and Control Engineering Army Academy of Armored ForcesBeijing100072China

One of the main challenges for multi-wheel hub motor driven vehicles is the coordination of individual drivetrains to improve mobility and stability in the steering *** paper proposes a dual-steering mode based on direct yaw moment control for enhancing vehicle steering ability in complex environ *** control system is designed as a hierarchical structure,with a yaw moment decision layer and a driving force distribution *** the higher-level layer,the objective optimization function is con-structed to obtain the slip steering ratio,which represents the degree of vehicle slip steering in the dual-steering *** moment controller using active disturbance rejection control theory is designed for continuous yaw rate *** the actual yaw rate of the vehicle deviates from the reference yaw rate obtained by the vehicle reference model and the slip steering ratio,the yaw moment controller isactuated to determine the yaw moment demand for vehicle *** the lower-level layer,there is a torque distribution controller based on distribution rules,which meets the requirement of yaw moment demand without affecting the total longitudinal driving force of the *** verifying the validity and feasibility of the dual-steering mode,simulations were conducted on the hardware-in-loop real-time simulation ***,corresponding real vehicle tests were carried out on an eight-wheel prototype *** results were generally consistent with the simulation results,thereby demon-strating that the proposed dual-steering mode reduces steering radius and enhances the steering per-formance of the vehicle.

关键词： Multi-wheel hub motor driven vehide Dual-steering mode Direct ya w moment control Real-time simulation

Immune checkpoint inhibition mediated with liposomal nanomedicine for cancer therapy

在线全文

学校读者我要写书评

暂无评论

Military Medical Research 2024年第1期11卷 98-114页

作者： guang-Long Ma wei-Feng Lin Faculty of Medicine Centre for Cancer ImmunologyUniversity of SouthamptonSouthampton SO166YDUK Department of Molecular Chemistry and Materials Science Weizmann Institute of Science76100 RehovotIsrael Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

Immune checkpoint blockade(ICB)therapy for cancer has achieved great success both in clinical results and on the *** the same time,success drives more attention from scientists to improve ***,only a small portion of patients are responsive to this therapy,and it comes with a unique spectrum of side effects termed immunerelated adverse events(irAEs).The use of nanotechnology could improve ICBs’delivery to the tumor,assist them in penetrating deeper into tumor tissues and alleviate their *** nanomedicine has been investigated and used for decades,and is well-recognized as the most successful nano-drug delivery *** successful combination of ICB with liposomal nanomedicine could help improve the efficacy of ICB *** this review,we highlighted recent studies using liposomal nanomedicine(including new emerging exosomes and their inspired nanovesicles)in associating ICB therapy.

关键词： Liposome Exosome Immune checkpoint blockade(ICB)

Application of Parametric Design to Mechanical Engineering

在线全文

学校读者我要写书评

暂无评论

International Journal of Plant Engineering and Management 2008年第4期13卷 242-247页

作者： HUANG shu-guang ZHANG Qi-wei YU Chong-yi China Huadian Engineering Co. Ltd. Beijing 100044 P.R. China

The definition and functions of parametric design were introduced. According to the practical condition of mechanical engineering design, the necessity and feasibility of parametric design for complex mechanical engineering design was analyzed. The related key technologies and methods were also discussed by a project example based on Inventor platform.

关键词： mechanical engineering parametric design Inventor

A condition-based maintenance policy for reconfigurable multi-device systems

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2024年第2期12卷 252-269页

作者： shu-Lian Xie Feng Xue wei-Min Zhang Jia-wei Zhu School of Mechanical Engineering Tongji UniversityShanghai201804People’s Republic of China

The exploration of component states for optimizing maintenance schedules in complex systems has garnered significant interest from ***,current literature usually overlooks the critical aspects of system flexibility and *** implementation of system reconfiguration can effectively mitigate system downtime and enhance production *** study proposes a dynamic condition-based maintenance policy considering reconfiguration for reconfigurable systems.A double-layer decision rule was constructed for the devices and *** achieve the best overall maintenance effect of the system,the remaining useful life probability distribution and recommended maintenance time of each device were used to optimize the concurrent maintenance time window of the devices and determine whether to reconfigure them.A comprehensive maintenance efficiency index was introduced that simultaneously considered the maintenance cost rate,reliability,and availability of the system to characterize the overall maintenance *** reconfiguration cost was included in the maintenance *** proposed policy was tested through numerical experiments and compared with different-level *** results show that the proposed policy can significantly reduce the downtime and maintenance costs and improve the overall system reliability and availability.

关键词： Condition-based maintenance(CBM) Reconfigurable system Remaining useful life Maintenance cost System reliability

Optimizing mechanical properties of HIPS fabricated with low-cost desktop 3D printers:investigating the impact of process parameters

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Manufacturing 2024年第2期12卷 379-395页

作者： Jin-Ting Xu guang-wei Zhang Man-Man Chen School of Automotive Engineering Dalian University of TechnologyDalian116024People’s Republic of China

Recently,low-cost desktop three-dimensional(3D)printers,employing the fused deposition modeling(FDM)technique,have gained widespread ***,most users cannot test the strength of printed parts,and little information is available about the mechanical properties of printed high-impact polystyrene(HIPS)parts using desktop 3D *** this study,the user-adjustable parameters of desktop 3D printers,such as crisscross raster orientation,layer thickness,and infill density,were *** experimental plans were designed using the Box-Behnken method,and tensile,3-point bending,and compression tests were carried out to determine the mechanical responses of the printed *** prediction models of the process parameters were regressed to produce the optimal combination of process *** experimental results showcase that the crisscross raster orientation has significant effects on the flexural and compression strengths,but not on the tensile *** an increase in the layer thickness,the tensile,flexural,and compression strengths first decreased and then increased,reaching their minimum values at approximately 0.16 mm layer *** addition,they all increased with an increase of infill *** was demonstrated that when the raster orientation,layer thickness,and infill density were 13.08°/–76.92°,0.09 mm,and 80%,respectively,the comprehensive mechanical properties of the printed HIPS were *** results can help end-users of desktop 3D printers understand the effects of process parameters on the mechanical properties,and offer practical suggestions for setting proper printing parameters for fabricating HIPS parts.

关键词： Desktop three-dimensional(3D)printers Fused deposition modeling(FDM) High-impact polystyrene(HIPS) Process parameters

A Semiparametric Additive-multiplicative Rates Model for the weighted Composite Endpoint of Recurrent and Terminal Events

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第4期40卷 985-999页

作者： Yi DENG Qiang XIONG shu wei LI School of Economics and Statistics Guangzhou UniversityGuangzhou 510006P.R.China

Recurrent event data are commonly encountered in many scientific fields,including biomedical studies,clinical trials and epidemiological surveys,and many statistical methods have been proposed for their *** this paper,we consider to use a weighted composite endpoint of recurrent and terminal events,which is weighted by the severity of each event,to assess the overall effects of covariates on the two types of events.A flexible additive-multiplicative model incorporating both multiplicative and additive effects on the rate function is proposed to analyze such weighted composite event process,and more importantly,the dependence structure among the recurrent and terminal events is left *** the estimation,we construct the unbiased estimating equations by virtue of the inverse probability weighting technique,and the resulting estimators are shown to be consistent and asymptotically normal under some mild regularity *** evaluate the finite-sample performance of the proposed method via simulation studies and apply the proposed method to a set of real data arising from a bladder cancer study.

关键词： Additive-multiplicative rates model estimating equation recurrent events terminal event weighted composite endpoint

现行医疗纠纷行政调解制度的实证分析——以安徽省某市为例

在线全文

学校读者我要写书评

暂无评论

安徽大学学报（哲学社会科学版） 2008年第6期32卷 41-44页

作者：舒广伟安徽中医药高等专科学校基础部安徽芜湖241000

以专业化、高效率为特征的行政调解在医疗纠纷处理中未能达到制度设计者预期的目的。通过实证调研的方法,检讨当前医疗纠纷行政调解制度所存在的问题及其症结,并提出重构医疗纠纷行政调解制度的初步构想。

关键词：医疗纠纷行政调解实证分析医患关系

在线全文

学校读者我要写书评

暂无评论

基于随机线性二次最优的磁悬浮控制系统

华东理工大学学报（自然科学版） 2005年第5期31卷 649-652页

作者：舒光伟 Reinhold Meisinger 上海应用技术学院机械与自动化工程学院上海200235 纽伦堡应用科学大学机械工程系德国纽伦堡90121

在分析电磁型(EM S)磁悬浮列车悬浮系统结构特性的基础上,建立了单磁铁磁悬浮系统的数学模型。采用随机线性二次最优的控制策略设计系统控制器,研究了在不同性能指标加权阵的情况下,该磁悬浮控制系统对具有初始磁间隙和受到外力干扰后... 详细信息

在分析电磁型(EM S)磁悬浮列车悬浮系统结构特性的基础上,建立了单磁铁磁悬浮系统的数学模型。采用随机线性二次最优的控制策略设计系统控制器,研究了在不同性能指标加权阵的情况下,该磁悬浮控制系统对具有初始磁间隙和受到外力干扰后磁间隙随时间变化的控制效果,并给出仿真结果,为磁悬浮控制系统的设计提供参考。

关键词：磁悬浮系统数学模型最优控制仿真

在线全文

学校读者我要写书评

暂无评论

基于Simulink的磁悬浮控制系统仿真

系统仿真学报 2008年第8期20卷 2168-2170,2176页

作者：舒光伟 Reinhold Meisinger 上海应用技术学院机械与自动化工程学院上海200235 纽伦堡应用科学大学机械工程系德国纽伦堡90121

在MATLAB/Simulink环境下,对电磁型(EMS)磁浮列车,利用Lagrange方程,结合动力学和电磁学基本理论,建立了单磁铁磁悬浮系统的数学模型,给出了采用线性二次最优控制策略的系统仿真模型,分析了影响该系统动态性能的主要因素。仿真结果表明... 详细信息

在MATLAB/Simulink环境下,对电磁型(EMS)磁浮列车,利用Lagrange方程,结合动力学和电磁学基本理论,建立了单磁铁磁悬浮系统的数学模型,给出了采用线性二次最优控制策略的系统仿真模型,分析了影响该系统动态性能的主要因素。仿真结果表明,所提出的方法是对磁悬浮系统建模和控制进行研究的有效途径。

关键词：磁悬浮系统 Lagrange方程 Simulink 系统模型