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High-accuracy tracking control of hybrid ejection system

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Science China(Technological Sciences) 2023年第10期66卷 2775-2785页

作者： CHENG NanNan GAO XiaoHui WANG Liang liu yongguang School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

In this study,a novel hybrid ejection system with hydraulic system and pulley-rope mechanism is proposed to accurately track the speed command of the hybrid ejection *** at the high-order,nonlinear and uncertain characteristics of hybrid ejection system,a new improved method of active disturbance rejection controller is proposed,which achieves good antiinterference performance while maintaining the system *** controller is obtained by combining fuzzy control algorithm with extended state observer by backstepping *** adding a state feedback,two extended state observers are applied to hydraulic system and pulley-rope mechanism respectively,which solves the problem that the extended state observers of the high-order system cannot determine the appropriate controller parameters to achieve the expected ***,fuzzy control algorithm is addressed to reduce the oscillations or even instability induced by large controller *** this idea,the mathematical model and the co-simulation model based on MATLAB-AMESim are *** simulation results show that the proposed controller can significantly improve the speed tracking accuracy and shorten the response ***,the proposed control strategy is verified by experiments.

关键词： hybrid ejection high-order system active disturbance rejection control fuzzy control extended state observer

Stabilizing zinc anode using zeolite imidazole framework functionalized separator for durable aqueous zinc-ion batteries

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Journal of Energy Chemistry 2024年第3期90卷 23-31,I0003页

作者： Weisong Zhang Xinyan Zhu Ling Kang Ziyu Peng Jing Zhu Liang Pan Lei Dai Shude liu Ling Wang yongguang liu Zhangxing He School of Chemical Engineering North China University of Science and TechnologyTangshan 063009HebeiChina Shanghai Key Laboratory of Multidimensional Information Processing East China Normal UniversityShanghai 201620China College of Textiles Donghua UniversityShanghai 201620China

Aqueous zinc-ion batteries(AZIBs) hold great promise as a viable alternative to lithium-ion batteries owing to their high energy density and environmental ***,AZIBs are consistently plagued by the formation of zinc dendrites and concurrent side reactions,which significantly diminish their overall service life,In this study,the glass fiber separator(GF) is modified using zeolite imidazole salt framework-8(ZIF-8),enabling the development of efficient ***-8,which is abundant in nitrogen content,efficiently regulates the desolvation of [Zn(H_(2)O)_(6)]^(2+) to inhibit hydrogen ***,it possesses abundant nanochannels that facilitate the uniform deposition of Zn~(2+) via a localized action,thereby hindering the formation of *** insulating properties of ZIF-8 help prevent Zn^(2+) and water from trapping electron reduction at the layer surface,which reduces corrosion of the zinc ***,ZIF-8-GF achieves the even transport of Zn^(2+) and regulates the homogeneous deposition along the Zn(002) crystal surface,thus significantly enhancing the electrochemical performance of the AZIBs,In particular,the Zn|Zn symmetric cell with the ZIF-8-GF separator delivers a stable cycle life at0.5 mA cm^(-2) of 2300 *** Zn|ZIF-8-GF|MnO_(2) cell exhibits reduced voltage polarization while maintaining a capacity retention rate(93.4%) after 1200 cycles at 1.2 A g^(-1) The unique design of the modified diaphragm provides a new approach to realizing high-performance AZIBs.

关键词： Aqueous zinc-ion batteries Separators modifications ZIF-8 Zn deposition Dendrite-free

Identification of immune cell infiltration pattern in diabetic nephropathy

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Genes & Diseases 2024年第6期11卷 103-106页

作者： yongguang liu Xiaoyou liu Ding liu Song Zhou Jie Zhang Jianmin Hu Guorong Liao Jun Liao Zefeng Guo Yuzhu Li Siqiang Yang Shichao Li Hua Chen Ying Guo Min Li Lipei Fan liuyang Li Ming Zhao Department of Organ Transplantation Zhujiang Hospital of the Southern Medical UniversityGuangzhouGuangdong 510280China Department of Organ Transplantation The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong 510120China

Diabetic nephropathy(DN)is now the most common cause of end-stage renal disease in the *** and immune responses play an important role in the pathogenesis of DN,but the specific mechanisms responsible for the development of this disease have yet to be fully *** epidemiological and preclinical studies have shown that inflammatory response and immune response play an important role in the early stages of DN pathogenesis.

关键词： nephropathy pathogenesis pattern

维普期刊数据库评论

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钢纤维混凝土桥面铺装层的细观应力破坏分析

东南大学学报（自然科学版） 2006年第5期36卷 799-804页

作者：刘永光曾庆敦天津大学建筑工程学院天津300072 华南理工大学交通学院广州510640

基于复合材料力学和线弹性断裂力学,简化了桥面铺装层及桥面板体系的力学模型,建立了修正的剪滞控制方程组.将模型裂缝区及远场的应力、位移条件合理转换为所建立计算模式的求解边界条件,进而得到了桥面铺装层和桥面板各子层的位移分布... 详细信息

基于复合材料力学和线弹性断裂力学,简化了桥面铺装层及桥面板体系的力学模型,建立了修正的剪滞控制方程组.将模型裂缝区及远场的应力、位移条件合理转换为所建立计算模式的求解边界条件,进而得到了桥面铺装层和桥面板各子层的位移分布函数.运用能量法则,考虑温度效应对桥面铺装层的影响,得到了桥面铺装层破坏应力的解析解.运用该计算模式对某桥桥面铺装层的破坏进行了仿真分析,证实了该方法的适用性.

关键词：钢纤维混凝土桥面铺装破坏分析应变能释放率温度应力剪滞理论

Data processing of small samples based on grey distance information approach

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Journal of Systems Engineering and Electronics 2007年第2期18卷 281-289页

作者： Ke Hongfa, Chen yongguang & liu Yi 1. Coll. of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, P. R. China 2. Unit 63880, Luoyang 471003, P. R. China Coll. of Electronic Science and Engineering National Univ. of Defense Technology Changsha 410073 P.R. China Unit 63880 Luoyang 471003 P.R. China

Data processing of small samples is an important and valuable research problem in the electronic equipment test. Because it is difficult and complex to determine the probability distribution of small samples, it is difficult to use the traditional probability theory to process the samples and assess the degree of uncertainty. Using the grey relational theory and the norm theory, the grey distance information approach, which is based on the grey distance information quantity of a sample and the average grey distance information quantity of the samples, is proposed in this article. The definitions of the grey distance information quantity of a sample and the average grey distance information quantity of the samples, with their characteristics and algorithms, are introduced. The correlative problems, including the algorithm of estimated value, the standard deviation, and the acceptance and rejection criteria of the samples and estimated results, are also proposed. Moreover, the information whitening ratio is introduced to select the weight algorithm and to compare the different samples. Several examples are given to demonstrate the application of the proposed approach. The examples show that the proposed approach, which has no demand for the probability distribution of small samples, is feasible and effective.

关键词： Data processing Grey theory Norm theory, Small samples Uncertainty assessments Grey distance measure, Information whitening ratio.

基于Grover搜索的无线Mesh网流量均衡路由算法

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计算机应用 2014年第7期34卷 1956-1959页

作者：刘永广广东轻工职业技术学院管理系广州510300 中国电子科技集团第七研究所广州510310

在无线Mesh网(WMN)应用中,用户通过Mesh网关接入到Internet,这种结构容易导致不同位置的Mesh路由器通过的流量不均衡,使部分路由器成为瓶颈,从而影响网络的性能和用户的服务质量(QoS)。针对这一问题,提出了一种基于Grover量子搜索算法... 详细信息

在无线Mesh网(WMN)应用中,用户通过Mesh网关接入到Internet,这种结构容易导致不同位置的Mesh路由器通过的流量不均衡,使部分路由器成为瓶颈,从而影响网络的性能和用户的服务质量(QoS)。针对这一问题,提出了一种基于Grover量子搜索算法的无线Mesh网流量均衡路由算法。算法中利用了量子计算的并行性,根据流量均衡函数模型构建了操作矩阵,通过Grover迭代获得流量均衡路径。仿真表明,算法选择的路径可以有效地平衡无线Mesh网流量,使每用户获得的最小带宽最大化,执行效率也优于同类算法。

关键词：无线Mesh网 Grover搜索流量均衡路由服务质量

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箱式动力结构的振动传递特性分析

北京航空航天大学学报 2015年第3期41卷 509-516页

作者：高维金王亮刘永光北京航空航天大学自动化科学与电气工程学院北京100191

针对箱式动力结构大型化、柔性化的特点,结合有限元法,以二级减速箱为对象研究不同激励条件下齿轮轴-轴承-箱体的振动传递特性.箱体采用Craig-Bampton动力缩减法缩聚到轴承孔中心处作为柔性子结构,啮合传递误差和输入轴扭矩波动分别作... 详细信息

针对箱式动力结构大型化、柔性化的特点,结合有限元法,以二级减速箱为对象研究不同激励条件下齿轮轴-轴承-箱体的振动传递特性.箱体采用Craig-Bampton动力缩减法缩聚到轴承孔中心处作为柔性子结构,啮合传递误差和输入轴扭矩波动分别作为激励源,考虑齿轮的时变啮合刚度、啮合错位、齿侧间隙、轴向重合度等非线性因素,计及轴段、齿轮的重力效应,基于轴段节点的思想分析了箱体缩聚节点处及轴承内圈处的动态加速度响应.最后基于Block Lanzos法提取箱体的固有特征频率.数值分析结果表明,输出轴轴承在动响应传递过程中没有起到衰减作用,应该替换以防影响整个系统的性能;减速箱的箱体设计保守,可以根据箱体缩聚节点处的动态响应为激励条件进行优化.

关键词： Craig-Bampton缩减法啮合时变刚度啮合传递误差轴段节点 BlockLanzos法

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作动器最优配置的柔性结构振动主动控制

国防科技大学学报 2018年第1期40卷 161-167页

作者：高维金王亮刘永光北京航空航天大学自动化科学与电气工程学院北京100191

柔性结构广泛应用于航空航天等领域,为了获得结构的最佳动力学性能,在主动振动控制中作动器或传感器位置优化成为关键。基于结构有限元动力学方程,在状态空间利用系统可控和可观Gramian矩阵考虑结构剩余模态的影响,推导一种新的作动器/... 详细信息

柔性结构广泛应用于航空航天等领域,为了获得结构的最佳动力学性能,在主动振动控制中作动器或传感器位置优化成为关键。基于结构有限元动力学方程,在状态空间利用系统可控和可观Gramian矩阵考虑结构剩余模态的影响,推导一种新的作动器/传感器优化准则。根据优化准则结合非线性整数规划遗传算法对作动器的位置进行配置。以悬臂板为研究对象,采用基于状态反馈的线性二次型调节器研究悬臂板的振动控制效果。与其他配置方法进行比较,验证了新方法的优越性。

关键词：柔性结构 Gmiman矩阵优化准则非线性整数规划遗传算法振动主动控制

一种改进的基于飞鸟迁徙的Ad hoc网络路由算法

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重庆邮电大学学报（自然科学版） 2014年第2期26卷 165-170页

作者：刘永广广东轻工职业技术学院广东广州510300 中国电子科技集团第七研究所广东广州510310

通过对一种基于飞鸟迁徙原理的Ad hoc网络组网算法的研究,发现该算法中的信标报文发送、路由恢复等设计存在缺陷,从而产生网络负载增加、路由重建效率低下等问题,严重影响了路由算法的效率。针对信标报文发送存在的问题,设计了新的信标... 详细信息

通过对一种基于飞鸟迁徙原理的Ad hoc网络组网算法的研究,发现该算法中的信标报文发送、路由恢复等设计存在缺陷,从而产生网络负载增加、路由重建效率低下等问题,严重影响了路由算法的效率。针对信标报文发送存在的问题,设计了新的信标报文发送策略,该策略综合考虑了结点的移动距离、移动方向、移动范围内的结点密度等影响因素,并通过和一个新增加的心跳报文一起工作,来改善原算法中存在的问题;针对路由恢复存在的问题,通过在协议运行过程中生成一个应急路由表来避免原算法中的报文回传策略,从而提高原算法的效率。仿真表明,新算法能有效克服原算法的问题,降低了路由开销和平均时延,提高了成功率,网络的整体性能进一步得到提升。

关键词：飞鸟迁徙 Ad hoc网络路由