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Prescribed Performance Tracking Control of Time-Delay Nonlinear Systems With Output Constraints

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1557-1565页

作者： Jin-Xi Zhang Kai-Di Xu Qing-guo wang IEEE the State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819China Institute of Artificial Intelligence and Future Networks Beijing Normal UniversityZhuhai 519087 Guangdong Key Laboratory of Artificial Intelligence and Multi-Modal Data Processing Beijing Normal University-Hong Kong Baptist University United International CollegeZhuhai 519087

The problem of prescribed performance tracking control for unknown time-delay nonlinear systems subject to output constraints is dealt with in this paper. In contrast with related works, only the most fundamental requirements, i.e., boundedness and the local Lipschitz condition, are assumed for the allowable time delays. Moreover, we focus on the case where the reference is unknown beforehand, which renders the standard prescribed performance control designs under output constraints infeasible. To conquer these challenges, a novel robust prescribed performance control approach is put forward in this ***, a reverse tuning function is skillfully constructed and automatically generates a performance envelop for the tracking error. In addition, a unified performance analysis framework based on proof by contradiction and the barrier function is established to reveal the inherent robustness of the control system against the time delays. It turns out that the system output tracks the reference with a preassigned settling time and good accuracy,without constraint violations. A comparative simulation on a two-stage chemical reactor is carried out to illustrate the above theoretical findings.

关键词： Nonlinear systems output constraints prescribed performance reference tracking time delays

Radial solution of the Logarithmic Laplacian system

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 114-124页

作者： ZHANG Li-hong NIE Xiao-feng wang guo-tao Bashir Ahmad School of Mathematics and Computer Science Shanxi Normal UniversityLinfen 041004China Nonlinear Analysis and Applied Mathematics(NAAM)Research Group Department of MathematicsFaculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia.

The paper generalizes the direct method of moving planes to the Logarithmic Laplacian ***,some key ingredients of the method are discussed,for example,Narrow region principle and Decay at ***,the radial symmetry of th... 详细信息

关键词： the Logarithmic Laplacian system radial symmetry the direct method of moving planes

Alterations in Serum Lipids and Lipoproteins Induced by Neoadjuvant Chemotherapy in Patients with Osteosarcoma around the Knee Joint:A Retrospective Analysis

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Current Medical Science 2024年第4期44卷 741-747页

作者： Su-guo wang Yong-gang wang guo-wei QIAN Li-na TANG Xin ZHOU Dong-dong CHENG Chen-liang ZHOU Qing-cheng YANG Zan SHEN Gao-zhong HUANG Hong-tao LI Department of General Medicine Shenzhen Third People's HospitalShenzhen 518112China Department of VIP Clinic Shanghai Jiao Tong University Afiliated Sixth People's HospitalShanghai 200233China Department of Oncology Shanghai Jiao Tong University Affiliated Sixth People's HospitalShanghai 200233China Cancer Research Institute of Jilin University the First Hospital of Jilin UniversityChangchun 130021China Department of Orthopedics Shanghai Jiao Tong University Afiliated Sixth People's HospitalShanghai 200233China

Objective To investigate the serum lipid profiles of patients with localized osteosarcoma around the knee joint before and after neoadjuvant *** After retrospectively screening the data of 742 patients between January 2007 and July 2020,50 patients aged 13 to 39 years with Enneking stage II disease were included in the *** lipid levels,including total cholesterol(TC),triglycerides(TG),high-density lipoprotein cholesterol(HDL-C),low-density lipoprotein cholesterol(LDL-C),lipoprotein-α[Lp(a)],and apolipoprotein A1,B,and E(ApoA1,ApoB,and ApoE),and clinicopathological characteristics were collected before and after neoadjuvant *** The mean levels of TC,TG,and ApoB were significantly increased following neoadjuvant chemotherapy(16%,38%,and 20%,respectively,*** values;P<0.01).The mean levels of LDL-C and ApoE were also 19%and 16%higher,respectively(P<0.05).No correlation was found between the pretreatment lipid profile and the histologic response to *** increase in Lp(a)was strongly correlated with the Ki-67 index(R=0.31,P=0.023).Moreover,a trend toward longer disease-free survival(DFS)was observed in patients with decreased TG and increased LDL-C following chemotherapy,although this difference was not statistically significant(P=0.23 and P=0.24,respectively).Conclusion Significant elevations in serum lipids were observed after neoadjuvant chemotherapy in patients with localized *** was no prognostic significance of pretreatment serum lipid levels on histologic response to neoadjuvant *** scale of increase in serum Lp(a)might have a potential prognostic role in *** with increased LDL-C or reduced TG after chemotherapy seem to exhibit a trend toward favorable DFS.

关键词： osteosarcoma neoadjuvant chemotherapy serum lipids

A Double-Interactively Recurrent Fuzzy Cerebellar Model Articulation Controller Model Combined with an Improved Particle Swarm Optimization Method for Fall Detection

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Computer Systems Science & Engineering 2024年第5期48卷 1149-1170页

作者： Jyun-guo wang The Department of Medical Informatics Tzu Chi UniversityHualien County97004Taiwan

In many Eastern and Western countries,falling birth rates have led to the gradual aging of *** adults are often left alone at home or live in a long-term care center,which results in them being susceptible to unsafe events(such as falls)that can have disastrous ***,automatically detecting falls fromvideo data is challenging,and automatic fall detection methods usually require large volumes of training data,which can be difficult to *** address this problem,video kinematic data can be used as training data,thereby avoiding the requirement of creating a large fall data *** study integrated an improved particle swarm optimization method into a double interactively recurrent fuzzy cerebellar model articulation controller model to develop a costeffective and accurate fall detection ***,it obtained an optical flow(OF)trajectory diagram from image sequences by using the OF method,and it solved problems related to focal length and object offset by employing the discrete Fourier transform(DFT)***,this study developed the D-IRFCMAC model,which combines spatial and temporal(recurrent)***,it designed an IPSO(Improved Particle Swarm Optimization)algorithm that effectively strengthens the exploratory capabilities of the proposed D-IRFCMAC(Double-Interactively Recurrent Fuzzy Cerebellar Model Articulation Controller)model in the global search *** proposed approach outperforms existing state-of-the-art methods in terms of action recognition accuracy on the UR-Fall,UP-Fall,and PRECIS HAR data *** UCF11 dataset had an average accuracy of 93.13%,whereas the UCF101 dataset had an average accuracy of 92.19%.The UR-Fall dataset had an accuracy of 100%,the UP-Fall dataset had an accuracy of 99.25%,and the PRECIS HAR dataset had an accuracy of 99.07%.

关键词： Double interactively recurrent fuzzy cerebellar model articulation controller(D-IRFCMAC) improved particle swarm optimization(IPSO) fall detection

Biological Evaluation of Lysionotin:a Novel Inhibitor of 5-Lipoxygenase for Anti-glioma

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Chinese Journal of Integrative Medicine 2024年第9期30卷 826-834页

作者： SHAO Xin-xin CHEN Cong LIU Jie LI Qing-jun HE Shan QI Xiang-hua FU Xian-jun wang Zhen-guo The First Clinical College of Medicine Shandong University of Traditional Chinese MedicineJinan250355China Institute for Literature and Culture of Chinese Medicine Shandong University of Traditional Chinese MedicineJinan250355China Key Laboratory of Classical Theory of Traditional Chinese Medicine Ministry of EducationShandong University of Traditional Chinese MedicineJinan250355China College of Pharmacy Shandong University of Traditional Chinese MedicineJinan250355China Experimental Center Shandong University of Traditional Chinese MedicineJinan250355China Neurology Department Affiliated Hospital of Shandong University of Traditional Chinese MedicineJinan250014China Marine Traditional Chinese Medicine Research Center Qingdao Academy of Traditional Chinese MedicineShandong University of Traditional Chinese MedicineQingdao266114Shandong ProvinceChina

Objective:To explore the potential mechanism of lysionotin in treating ***:First,target prediction based on Bernoulli Naïve Bayes profiling and pathway enrichment was used to predict the biological activity of *** binding between 5-lipoxygenase(5-LO)and lysionotin was detected by surface plasmon resonance(SPR)and molecular docking,and the inhibitory effects of lysionotin on 5-LO and proliferation of glioma were determined using enzyme inhibition assay in vitro and cell viability analysis,***,the pharmaceutical effect of lysionotin was explored by cell survival rate analysis and liquid chromatography with tandem mass spectrometry(LC-MS/MS).The protein expression,intracellular calcium ion concentration and cytoskeleton detection were revealed by Western blot,flow cytometry and fluorescence labeling,***:Target prediction and pathway enrichment revealed that lysionotin inhibited 5-LO,a key enzyme involved in the arachidonic acid metabolism pathway,to inhibit the proliferation of *** docking results demonstrated that 5-LO can be binding to lysionotin through hydrogen bonds,forming bonds with His600,Gln557,Asn554,and *** analysis further confirmed the interaction between 5-LO and ***,enzyme inhibition assay in vitro and cell survival rate analysis revealed that 50%inhibition concentration of lysionotin and the median effective concentration of lysionotin were 90 and 16.58µmol/L,respectively,and the results of LC-MS/MS showed that lysionotin inhibited the production of 5S-hydroperoxy-eicosatetraenoic acid(P<0.05),and moreover,the LC-MS/MS results indicated that lysionotin can enter glioma cells well(P<0.01)and inhibit their *** blot analysis demonstrated that lysionotin can inhibit the expression of 5-LO(P<0.05)and downstream leukotriene B4 receptor(P<0.01).In addition,the results showed that lysionotin affected intracellular calcium ion concentration by inh

关键词： 5-lipoxygenase inhibitor lysionotin 5-lipoxygenase leukotriene B4 calcium ion cytoskeleton

Simultaneously Improved Curing,Mechanical,Antioxidative Properties and Reduced ZnO Loading of Silica Filled NR Composites by Incorporation of Low-cost Crude Carbon Dots via Conventional Melt-milling Method

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Chinese Journal of Polymer Science 2024年第6期42卷 815-825页

作者： Chao-Ying Sun Hai-Jun Ji Li-Wei Li Hui Yang Xiao-Peng An Yi-Ping Chen Ming-Jian Han Can Jiang Li-Qun Zhang Peng Yu Run-guo wang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing100029China School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan430205China

Rubbers or elastomers play an important role in hi-tech technology and civilian daily life because of their unique and strategical ***,the rubber additives are essential components for rubbers’practical ***,developing novel multifunctional additives has attracted increasing research *** this work,low-cost crude carbon dots(CCDs)were used as multifunctional additives for natural rubber/silica system(without any additional modification)through industrial compatible melt-mixing *** results revealed that the CCDs could disperse well in the NR/silica system,and they could not only endow the rubber compound with excellent anti-aging capability due to CCDs’radical scavenging activity because of their plenty of nitrogen-containing species,but also improve the curing rate and mechanical performance of the rubber ***,the CCDs could reduce the rolling resistance of the rubber composites(tanδvalue at 7%strain of the rubber composite could be decreased by 34%),which is promising for the application of energy-saving tire ***,the addition of CCDs could effectively reduce the ZnO dosage by at least 40%in the rubber composite without deteriorating its ***,this work provides valuable guidance to develop novel cheap yet effective additives for the elastomer.

关键词： Natural rubber Crude carbon dots Antioxidant ZnO reduction Vulcanization

在乡村发现科学革命:民国北碚“科学”与“地方”的互构

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重庆大学学报（社会科学版） 2024年第4期30卷 157-172页

作者：王果四川大学历史文化学院四川成都610213

近代中国经历了一场科学革命的洗礼,它发端于清末民初,勃兴于二三十年代,抗战以后日渐普及,极大地改变了中国社会的基本面貌。以往对科学革命的认知,受西方科学史的影响,多聚焦大科学家和城市,关注正式的科学组织和成建制的学科,对科学... 详细信息

近代中国经历了一场科学革命的洗礼,它发端于清末民初,勃兴于二三十年代,抗战以后日渐普及,极大地改变了中国社会的基本面貌。以往对科学革命的认知,受西方科学史的影响,多聚焦大科学家和城市,关注正式的科学组织和成建制的学科,对科学下乡并如何改变乡村关注不多,对科学的流动性、本土化、在地化研究不足。本文以中国第一所民办科学院“中国西部科学院”为主要研究对象,讨论它如何将科学观念本土化、制度化,用现代科学的观念和文化推动乡村的转型,创造性地重塑地方社会的经济、文化基本面貌。重点讨论体系庞杂的近代科学体系,以什么样的个性化样态进入地方社会,地方社会如何根据自身需求、本地资源、既有基础,设计、运行、调整当地科学的体系结构和基本建制。在中国西部科学院自己设计的组织结构图中,其下属的理化研究所、生物研究所、农业研究所、博物馆、乡村学校、乡土报纸等核心机构,分别对应科学研究、科学教育、科学普及等不同方面,发挥着不同的社会功能,将现代科学的基本意涵落实到地方矿业开发、西部动植物发现与分类、山区经济开发、科学知识和观念的普及等各个领域和方面。在这一进程中,传统的乡村逐步转变为现代的地方,抽象的科学得以落实和丰富。从这个意义上说,科学在改变地方的同时,地方也重构了科学,使之呈现出地方的样态。乡村科学革命不是千篇一律的,具有很强的地方性和时代性,具有注重实用、注重普及、注重联络和资源导向的结构性特点,值得进一步深入研究。

关键词：科学革命中国西部科学院乡村建设

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“乡村共和”:辛亥前后的共和潜流

学术月刊 2024年第8期56卷 187-197页

作者：王果四川大学历史文化学院四川成都610005

“共和”取代“帝制”为近代中国之一大变局。一般认为,这一巨变的动力,是源自西方的共和观念,而较忽视中国本土长期日用不知的“乡村共和”经验。晚清以来,时杰曾借地方自治和立宪运动,尝试将其融入现代政体。在民初中央政治层面混乱... 详细信息

“共和”取代“帝制”为近代中国之一大变局。一般认为,这一巨变的动力,是源自西方的共和观念,而较忽视中国本土长期日用不知的“乡村共和”经验。晚清以来,时杰曾借地方自治和立宪运动,尝试将其融入现代政体。在民初中央政治层面混乱不堪的情况下,正是“乡村共和”治理经验的创造性地转化,让共和体制在中国社会基层扎根。或可以说,“乡村共和”是辛亥前后的另一种共和样态。相较于中央层面的共和,“乡村共和”虽为潜流和低音,但却是近代中国走向共和的重要历史基础,深刻地影响着中国政治的走向。

关键词：乡村共和共和乡治

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铁路建设与大后方山区经济的现代转型

南京大学学报（哲学．人文科学．社会科学） 2024年第4期61卷 81-92,157页

作者：王果四川大学历史文化学院四川省成都市610065

山区市场的现代整合因其地形复杂、交通困难、商品特殊,历来研究比较薄弱。以四川修建的第一条铁路北川铁路为切入点,考察工业化进程中山区社会传统市场与现代市场交融共生的现代转型过程。与东北、沿海地区的铁路、煤矿多操之于帝国主... 详细信息

山区市场的现代整合因其地形复杂、交通困难、商品特殊,历来研究比较薄弱。以四川修建的第一条铁路北川铁路为切入点,考察工业化进程中山区社会传统市场与现代市场交融共生的现代转型过程。与东北、沿海地区的铁路、煤矿多操之于帝国主义之手不同,北川铁路的兴建和运营,虽然融入了跨地域的知识、技术、人员流动,但始终掌握在地方社会手中,为讨论现代经济转型提供了一个难得的本土视角。与施坚雅所见相似,铁路建成后的山区市场并不与传统市场相抵牾,而是经过区域性调整以后的延伸、发展和壮大。与他所见不同的是,川东山区的现代市场不是正六边形的标准市场,而是沿着河道和铁路的线性延伸。在从有机经济向矿物经济的现代转型中,川东山区的地方性、全国性经济联系更为紧密,没有出现西方工业化进程中工业与农业、城市与乡村、传统与现代的明显分离。

关键词：北川铁路施坚雅区域市场北碚