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A chattering free consensus controller for multiple Lur'e systems with a non-autonomous leader and directed switching topology

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Science China(Technological Sciences) 2023年第4期66卷 1110-1118页

作者： wang peijun YU WenWu WEN GuangHui YU XingHuo HUANG TingWen School of Mathematics and Statistics Anhui Normal UniversityWuhu 241000China Anhui Province Engineering Laboratory of Intelligent Robot's Information Fusion and Control Anhui Normal UniversityWuhu 241000China School of Mathematics Frontiers Science Center for Mobile Information Communication and SecuritySoutheast UniversityNanjing 210096China Purple Mountain Laboratories Nanjing 21111lChina Department of Electrical Engineering Nantong UniversityNantong 226019China Department of Systems Science School of MathematicsSoutheast UniversityNanjing 210096China School of Engineering RMIT UniversityMelbourne VIC 3001Australia Science Program Texas A&M University at QatarDoha 23874Qatar

Achieving asymptotical cooperative goal for multi-agent systems(MASs)with non-autonomous leaders(i.e.,leaders with nonzero inputs)is a critical but challenging issue.Traditional approach is to use discontinuous controllers which may cause chattering phenomenon in practical applications.How to achieve the asymptotical goal via a chattering free cooperative controller remains to be open so far.In this paper,an adaptive continuous controller is designed to achieve zero error consensus tracking in multiple Lur’e systems with a non-autonomous leader under directed switching topology.Firstly,an unknown input observer(UIO)based on relative outputs is given to estimate the relative full states.Then an adaptive continuous controller is designed by introducing a decay function which remains positive into the term that plays the role of eliminating the impacts of leader’s nonzero inputs.Secondly,by using multiple Lyapunov functions(MLFs)technique,it is proven that zero error consensus tracking can be achieved if the average dwell time(ADT)is greater than a positive threshold.Finally,theoretical result is verified by performing simulations on Chua’s circuits.Compared with existing work,the proposed controller can not only achieve asymptotical consensus,but also is chattering free.

关键词： multi-agent system consensus chattering free non-autonomous leader directed switching topology

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A Novel Open C-shaped Molar Band for Orthodontic Applications： Mechanical Characterizations and Clinical Trials

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Journal of Wuhan University of Technology(Materials Science) 2016年第5期31卷 1174-1180页

作者：周珊 GUO Yang wang peijun FU Wei XU Shiqian 张斌 Department of Orthodontics the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150006China Department of Endodonties the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150006China School of Materials Science and Engineering of Harbin Institute of TechnologyHarbin 150006China Department of Implantology the Second Affiliated Hospital of Harbin Medical UniversityHarbin 150006China

To evaluate the retention properties of the novel ‘C＇-shaped molar bands at a laboratory level. Resin-modified glass ionomer cement（RMGIC） was used as a luting agent for the novel C-shaped molar band. The mechanical properties of the band were examined and the retention performance was characterized in the mesial, distal and vertical directions. A clinical trial was conducted using a spilt-mouth design on 50 patients. The novel C-shaped molar bands fit most molars without a repeated try-in process.The use of both nanoHA coating and RMGIC enhanced the tensile（8.00 ± 1.8 MPa） and shear strengths（27.17 ± 8.6 MPa） of the molar bands, leading to high retention in vertical, mesial and distal directions（ p 〈 0.001）. In clinical trials, the C-shaped molar bands had a failure rate（15%） comparable to that of traditional bands, and 93% of the failed bands demonstrated an adhesive remnant index score of 0, corroborating the observation that no luting agent residue remained on the tooth surface in most cases. The novel C-shaped molar bands appear to be a promising appliance that requires further clinical investigations, and may be used effectively in orthodontics.

关键词： Copen ＇C＇-shaped molar bands nano-hydroxyapatite resin-modified glass ionomer cement retention performance clinical trials

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讀《錢鍾書手稿集·中文筆記》第二册札記

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中国文化 2024年第1期 147-164页

作者：王培軍上海大學中文系

章學誠《文史通義》中區別學者,謂浙東貴專家,浙西尚博雅,浙東、浙西,道並行而不悖。其拈出專家、博雅,為學者之兩派,與伯林(Isaiah Berlin)所擬喻之學人分狐狸、刺猬二型,旨歸一揆,可云卓識。惟近百餘年來,烏學之主流,大抵趨於專家之學... 详细信息

章學誠《文史通義》中區別學者,謂浙東貴專家,浙西尚博雅,浙東、浙西,道並行而不悖。其拈出專家、博雅,為學者之兩派,與伯林(Isaiah Berlin)所擬喻之學人分狐狸、刺猬二型,旨歸一揆,可云卓識。惟近百餘年來,烏學之主流,大抵趨於專家之學,而能博雅者少。

关键词：博雅浙西錢鍾書手稿文史

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人工智能2.0时代统计学专业信息类课程建设——以安徽师范大学为例

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大学数学 2024年第3期40卷 18-22页

作者：王佩君徐林任永安徽师范大学数学与统计学院安徽芜湖241000

针对“人工智能+统计学”复合专业建设要求,本文主要分析了人工智能2.0时代,统计学专业信息类课程建设存在的问题,并提出了建设思路与规划策略,以加快适应人工智能2.0时代需求的统计学专业信息类课程建设,培养“人工智能+统计学”复合... 详细信息

针对“人工智能+统计学”复合专业建设要求,本文主要分析了人工智能2.0时代,统计学专业信息类课程建设存在的问题,并提出了建设思路与规划策略,以加快适应人工智能2.0时代需求的统计学专业信息类课程建设,培养“人工智能+统计学”复合型人才.

关键词：人工智能统计学数据挖掘机器学习

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Analysis of the Docking Mechanism between Excellent Traditional Culture and Shanghai citizens' self-cultivation actions

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International English Education Research 2019年第1期 40-42页

作者： wang peijun LI Xiaonan Shanghai University of Engineering Science Songjiang District333 Longteng Road. 201620

Under the background of General Secretary Xi Jinping's "cultural self-confidence" at the 18th National Congress, excellent traditional culture has become the comerstone of the whole society's cultural construction. It is not only the essence of Chinese culture, but also a self-cultivation guide for the Chinese nation. Based on the intrinsic relationship between excellent traditional culture and Shanghai citizens self-cultivation actions, combined with the problems existing in the docking, this paper proposes to systematically construct the docking mechanism between excellent traditional culture and Shanghai citizens' self-cultivation actions from the six levels of schools, institutions, rural areas, communities, enterprises and families.

关键词： excellent traditional culture citizens'self-cultivation actions docking mechanism

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Discovery of the ancient Ordovician oil-bearing karst cave in Liuhuanggou,North Tarim Basin,and its significance

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Science China Earth Sciences 2012年第9期55卷 1406-1426页

作者： ZHONG JianHua MAO Cui LI Yong LI Yang YUAN XiangChun NIU YongBin CHEN Xin HuANG ZhiJuan SHAO ZhuFu wang peijun LI Jia ZHANG DanFeng College of Geoscience and Technology China University of PetroleumQingdao 266580China Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China Oilfield Department Sinopec GroupBeijing 100825China Institute of Exploration and Development Sinopec GroupBeijing 100083China Institute of Resources and Environment College Henan Polytechnic UniversityJiaozuo 454000China BGP Geophysical Research Institute CNPCZhuozhou 072751China Institute ofTarim Oilfield CNPCKorla 841000China Graduate University of Chinese Academy of Sciences Beijing 100049China

A typical ancient karst cave is found in the Yijianfang Formation of Ordovician at Liuhuanggou,North Tarim Basin.With an entrance of 4.8 m wide and 20 m high,the Liuhuanggou ancient karst cave extends to NW 315° and has been filled by sediments,which can be classified into three types according to their nature and origin:clastic sediments(gravels),chemical sediments(palaeotravertine),and mixed sediments.Among them,the Paleotravertine and gravels are most common.The palaeotravertine is laminated type and yellowish brown or black in color due to oil inside.When saturated with oil,the palaeotravertine is black.Under microscope,oil mainly accumulates in the cracks between calcite crystals.The filling period of the Liuhuanggou karst cave can be divided into three stages:mixed filling,chemical filling,and clastic(palaeotravertine breccia) filling.Numerous fractures are distributed on one side of the karst cave.The fractures can be as wide as 40 cm and over 40 m long.Fractures of different periods and sizes constitute a fracture network and are all filled with calcite veins.Oil can be found inside the fractures.In the chemical fillings,sulfur is also found,which can indicate the magma influence on karst caves.The existence of sulfur also confirms that the Liuhunggou karst cave was formed in ancient times rather than recently or nowadays.Different from normal sedimentary limestone,the ancient Liuhuanggou karst cave has a distinct isotope fractionation and the depletion of heavy carbon and oxygen isotope.Controlled by the northwest oriented vertical strike-slip shear fault,the karst cave is actually a dissolved vertical fault belt.

关键词：岩溶洞穴奥陶系硫磺盆地碎屑沉积物化学沉积物油气裂缝分布

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基于物元可拓法的高潜水位煤矿区土地损毁程度评价

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中国矿业 2024年第1期33卷 87-97页

作者：李超崔瑞豪张曦张曦元马晋明王培俊永煤集团复垦公司河南永城476600 中国矿业大学环境与测绘学院江苏徐州221116 西北农林科技大学资源环境学院陕西杨凌712100 中国矿业大学公共管理学院(应急管理学院) 江苏徐州221116

高潜水位煤矿区井工开采造成了地面塌陷积水、农田减产等情况,但积水农田的损毁程度、损毁范围较难获取;加之高潜水位煤矿区采煤沉陷土地具有典型的不确定性和模糊性,因此,科学进行土地损毁程度评定成为矿区土地复垦方案编制和受损农民... 详细信息

高潜水位煤矿区井工开采造成了地面塌陷积水、农田减产等情况,但积水农田的损毁程度、损毁范围较难获取;加之高潜水位煤矿区采煤沉陷土地具有典型的不确定性和模糊性,因此,科学进行土地损毁程度评定成为矿区土地复垦方案编制和受损农民补偿标准制定的理论基础。采用熵权法确定积水时长、下沉深度、倾斜变形(东西方向,南北方向)、曲率(东西方向,南北方向)、水平变形(东西方向,南北方向)和水平移动(东西方向,南北方向)10种指标的权重,将极限条件法和可拓评价方法相结合,对芡实地、水稻玉米田和莲藕池共计34个评价单元的土地损毁程度进行评价。研究结果表明:芡实地总面积为444.7hm^(2),中度损毁面积为135.7hm^(2),占比30.51%;水稻玉米田总面积为747.2hm^(2),整体属于轻度损毁状态;莲藕池总损毁面积为562.6 hm^(2),中度损毁面积为151.8 hm^(2),占比26.98%;研究区整体土地损毁程度较好。研究结论为科学确定土地损毁程度及范围提供理论支撑,对地区土地复垦方案编制及损毁补偿标准制定具有重要意义。

关键词：土地损毁熵权法物元可拓法年内水频率指数(AWFI) 高潜水位煤矿区

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国产低Mo耐火钢高大空间建筑雨棚结构抗火设计

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钢结构（中英文） 2024年第6期39卷 31-41页

作者：宫海刘乐郭建好王培军崔强智聚装配式绿色建筑创新中心南通有限公司江苏南通226010 山东大学土建与水利学院济南250061 南京钢铁股份有限公司南京211500

火灾是钢结构安全的主要威胁之一,传统钢结构的主要防火措施为涂抹防火涂料、浇筑混凝土形成组合结构或设置防火板,其中又以防火涂料应用最为广泛。然而,室外涂抹防火涂料耐久性差,存在坠落伤人隐患。且对于防火要求较高的钢结构需厚涂... 详细信息

火灾是钢结构安全的主要威胁之一,传统钢结构的主要防火措施为涂抹防火涂料、浇筑混凝土形成组合结构或设置防火板,其中又以防火涂料应用最为广泛。然而,室外涂抹防火涂料耐久性差,存在坠落伤人隐患。且对于防火要求较高的钢结构需厚涂防火涂料,这尤其会影响地标性建筑的建筑效果。近年来,耐火钢作为一种新型的防火保护措施逐渐兴起,其能够有效避免上述防火措施的缺点,但由于大量添加合金元素Mo导致其成本往往较高。南钢集团研发的新型低Mo耐火钢在保证优异抗火性能的同时减少了Mo元素的添加量,从而减小了综合制造成本而受到广泛关注。基于构件承载力法,依托于某具有高大空间的钢结构大雨棚,对南钢新型低Mo耐火钢在抗火设计中的应用可行性进行了研究。作为某市新建地标性建筑,设计要求大雨棚屋面梁应满足3 h耐火极限。首先探索了高温下该国产耐火钢的材性折减规律,通过与现行规范理论计算结果对比,发现该国产耐火钢满足通用耐火钢的材性折减要求且可根据规范相应公式准确预测不同温度下的材性折减。随后基于结构抗火设计原则共确定了11个火灾场景,分别分布于雨棚边跨及中跨。以上火灾场景被认为已覆盖该大雨棚实际使用状态下可能发生的所有火灾。进一步根据相关规范,分析了各火灾场景下大雨棚的升温规律。分析表明,按照设计要求经3 h升温后,边跨火灾场景下最高空气温度接近750℃,最高构件温度接近730℃;中跨火灾场景下最高空气温度接近600℃,最高构件温度接近570℃,均远低于ISO 834标准火灾升温。高大空间建筑火灾下升温低的特点表明高大空间建筑可作为未来耐火钢应用的主要场景。最终,分别采用Q355普通结构钢与Q345FR国产耐火钢对各火灾工况下各构件进行承载力和稳定性验算。结果表明,若仅采用Q355普通结构钢,高温下钢梁GL3、GL3a及GL4无法满足承载力要求;而若采用Q345FR耐火钢,屋顶钢构件的强度和整体稳定性均能满足要求。

关键词：低Mo耐火钢材性试验钢结构抗火高大空间建筑结构分析

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WP10缸盖铸造缺陷分析及工艺改进

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中国铸造装备与技术 2024年第3期59卷 82-85页

作者：李伟涛宋永亮姜建光王洋王培军潍柴动力股份有限公司山东潍坊261000

针对WP10缸盖铸件毛坯由于铸造工艺设计不合理而导致的铸件废品率较高的情况,对WP10缸盖铸造缺陷进行了分析,对其铸造工艺进行改进,通过修改浇注系统截面积、增加气眼针、增加气眼针高度以及增加局部壁厚等方法,有效地降低了铸件的废品率。

关键词：气孔砂眼烧结浇注系统排气

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Observer-based node-to-node consensus of multi-agent systems with intermittent networks

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Science China(Information Sciences) 2020年第11期63卷 208-218页

作者： Lingling YAO peijun wang School of Mathematics Southeast University School of Mathematics and Statistics Anhui Normal University

In this paper, we investigate the problem of achieving node-to-node consensus(NNC) in two-layer multiple-input-multiple-output(MIMO) multi-agent systems(MASs) with Lipschitz nonlinear dynamics and intermittent directed networks, where the cooperative goal is to make each follower to track a specified leader.By using the relative outputs, discontinuous observers are given to reconstruct the full states of followers and then feedback controllers are designed. Furthermore, some NNC criteria are given by investigating stability of the error system. To verify the obtained results, a simulation is performed.

关键词： two layer multi-agent system multiple Lyapunov function intermittent network node-to-node consensus

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