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Achieving Given Precision Within Prescribed Time yet With Guaranteed Transient Behavior via Output Based Event-Triggered Control

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IEEE/CAA Journal of Automatica Sinica 2024年第10期11卷 2059-2067页

作者： Zeqiang Li yujuan wang Yongduan Song International Joint Laboratory on Safety and Control of Autonomous Unmanned Systems School of AutomationChongqing UniversityChongqing 400044China IEEE

It is interesting yet nontrivial to achieve given control precision within user-assignable time for uncertain nonlinear *** underlying problem becomes even more challenging if the transient behavior also needs to be accommodated and only system output is available for *** key design innovations are proposed to circumvent the aforementioned technical difficulties,including the employment of state estimation filters with event-triggered mechanism,the construction of a novel performance scaling function and an error *** contrast to most existing performance based works where the stability is contingent on initial conditions and the maximum allowable steady-state tracking precision can only be guaranteed at some unknown(theoretically infinite)time,in this work the output of the system is ensured to synchronize with the desired trajectory with arbitrarily pre-assignable convergence rate and arbitrarily pre-specified precision within prescribed time,using output only with lower cost of sensing and *** addition,all the closed-loop signals are ensured to be globally uniformly bounded under the proposed control *** merits of the designed control scheme are confirmed by numerical simulation on a ship model.

关键词： Adaptive control nonlinear systems output feedback prescribed performance

Dynamic Constraint-Driven Event-Triggered Control of Strict-Feedback Systems Without Max/Min Values on Irregular Constraints

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 569-580页

作者： Zhuwu Shao yujuan wang Zeqiang Li Yongduan Song the State Key Laboratory of Power Transmission Equipment&System Security and New Technology and the School of AutomationChongqing UniversityChongqing 400044China IEEE

This work proposes an event-triggered adaptive control approach for a class of uncertain nonlinear systems under irregular *** the constraints considered in most existing papers,here the external irregular constraints are considered and a constraints switching mechanism(CSM)is introduced to circumvent the difficulties arising from irregular output *** on the CSM,a new class of generalized barrier functions are constructed,which allows the control results to be independent of the maximum and minimum values(MMVs)of constraints and thus extends the existing ***,we proposed a novel dynamic constraint-driven event-triggered strategy(DCDETS),under which the stress on signal transmission is reduced greatly and no constraints are violated by making a dynamic trade-off among system state,external constraints,and inter-execution *** is proved that the system output is driven to close to the reference trajectory and the semi-global stability is guaranteed under the proposed control scheme,regardless of the external irregular output *** also verifies the effectiveness and benefits of the proposed method.

关键词： Adaptive control dynamic constraint-driven event-triggered control irregular output constraints nonlinear strict-feed-back systems

Application of magnetotactic bacteria as engineering microrobots:Higher delivery efficiency of antitumor medicine

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Chinese Chemical Letters 2024年第10期35卷 139-146页

作者： Jing Zhang Charles wang Yaoyao Zhang Haining Xia yujuan wang Kun Ma junfeng wang High Magnetic Field Laboratory CAS Key Laboratory of High Magnetic Field and lon Beam Physical BiologyHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China University of California San DiegoLa JollaCA 92093United States International Magnetobiology Frontier Research Center Hefei 230031China

For a significant duration,enhancing the efficacy of cancer therapy has remained a critical *** bacteria(MTB),often likened to micro-robots,hold substantial promise as a drug delivery ***,classified as anaerobic,aquatic,and gram-negative microorganisms,exhibit remarkable motility and precise control over their internal biomineralization *** unique ability results in the formation of magnetic nanoparticles arranged along filamentous structures in a catenary fashion,enclosed within a *** bacteria possess distinctive biochemical properties that facilitate their precise positioning within complex *** harnessing these biochemical attributes,MTB could potentially offer substantial advantages in the realm of cancer *** article reviews the drug delivery capabilities of MTB in tumor treatment and explores various applications based on their inherent *** objective is to provide a comprehensive understanding of MTB-driven drug delivery and stimulate innovative insights in this field.

关键词： Magnetotactic bacteria Engineering microrobot Tumor treatment Drug delivery Bioconjugation

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自传视野下的鲁迅《著者自叙传略》释读

咸阳师范学院学报 2024年第1期39卷 96-104页

作者：王余鹃华中师范大学文学院湖北武汉430079

自传,是作者自叙生平的一种文类。作为鲁迅生前所唯一公开发表过的一篇自传文,无论是就其形式,抑或是就其内容而言,《著者自叙传略》都属于中国最为传统的“书序式自传”。然则,在这篇自传文之中,亦存在着很多“反自传”的地方。总体而... 详细信息

自传,是作者自叙生平的一种文类。作为鲁迅生前所唯一公开发表过的一篇自传文,无论是就其形式,抑或是就其内容而言,《著者自叙传略》都属于中国最为传统的“书序式自传”。然则,在这篇自传文之中,亦存在着很多“反自传”的地方。总体而言,这种情况的出现,应主要源于鲁迅独特的自我身份定位——泯于众人的“我”。

关键词：鲁迅《著者自叙传略》 “反自传” 泯于众人的“我”

厄贝沙坦氢氯噻嗪联合美托洛尔治疗老年重症心力衰竭的临床效果分析

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中国社区医师 2024年第22期40卷 62-64页

作者：王玉娟单县海吉亚医院急诊内科山东菏泽274300

目的:分析厄贝沙坦氢氯噻嗪联合美托洛尔在重症心力衰竭(HF)老年患者中的应用效果。方法:以70例重症HF老年患者作为受试者(2022年6月-2023年6月),均为单县海吉亚医院收治,根据双盲法随机分组,每组35例,患者均为女性。对照组进行常规治疗... 详细信息

目的:分析厄贝沙坦氢氯噻嗪联合美托洛尔在重症心力衰竭(HF)老年患者中的应用效果。方法:以70例重症HF老年患者作为受试者(2022年6月-2023年6月),均为单县海吉亚医院收治,根据双盲法随机分组,每组35例,患者均为女性。对照组进行常规治疗,观察组在对照组基础上实施厄贝沙坦氢氯噻嗪联合美托洛尔联合治疗。对比两组临床疗效。结果:治疗后,两组左室舒张末期内径短于治疗前,且观察组比对照组短,两组左室射血分数、B型尿钠肽高于治疗前,且观察组比对照组高,两组6 min内步行距离长于治疗前,且观察组比对照组长(P<0.05)。治疗后,两组肿瘤坏死因子-α、超敏C反应蛋白、白细胞介素-8、白细胞介素-6、心肌肌钙蛋白Ⅰ及醛固酮水平均低于治疗前,且观察组低于对照组(P<0.05)。结论:对重症HF老年患者实施厄贝沙坦氢氯噻嗪联合美托洛尔治疗,效果较好,有助于恢复患者心功能,减轻心肌损伤,降低炎性因子水平。

关键词：重症心力衰竭老年厄贝沙坦氢氯噻嗪美托洛尔

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汪曾祺《受戒》中的乡土情结探究

西部学刊 2024年第13期 118-121页

作者：王宇娟山西省政法管理干部学院太原030012

《受戒》是汪曾祺晚年的代表作品,其中有很多作者乡土记忆与乡土情结的体现,使这部作品有着独特的乡土味道。《受戒》在语言运用上多用口语词汇,对话语言简短、直白、风趣,还有民间小调的运用,呈现出乡土化的语言风格。在人物形象设计上... 详细信息

《受戒》是汪曾祺晚年的代表作品,其中有很多作者乡土记忆与乡土情结的体现,使这部作品有着独特的乡土味道。《受戒》在语言运用上多用口语词汇,对话语言简短、直白、风趣,还有民间小调的运用,呈现出乡土化的语言风格。在人物形象设计上,塑造性格勤劳淳朴、真诚自然、不拘小节的乡土人物群像,在明海和小英子两个主人公的形象设计上,突出了两人在自然乡土中生长所形成的自然、纯真的天性。《受戒》大量描绘了苏北地区的乡村民风民俗、商业、民间信仰、民间艺术等,以及河边人家、水上芦苇荡等江南水乡的优美自然风景。在情感表达上,汪曾祺以柔和温暖的叙事基调、勤劳善良的人物塑造、自然纯粹的爱情描写表达了对记忆中乡土的爱与眷恋。这些共同展现了《受戒》中的乡土情结。

关键词：汪曾祺《受戒》乡土情结

Achieving Given Precision Within Prescribed Time yet With Guaranteed Transient Behavior via Output Based Event-Triggered Control

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Practical Prescribed Time Tracking Control With Bounded Time-Varying Gain Under Non-Vanishing Uncertainties

自动化学报（英文版） 2024年第10期 2059页

作者： Zeqiang Li yujuan wang Yongduan Song

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自动化学报（英文版） 2024年第1期

作者： Dahui Luo yujuan wang Yongduan Song

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反流性食管炎的中医治疗进展

中医临床研究 2024年第21期16卷 32-36页

作者：张璇王玉娟山东中医药大学山东济南250355 济南市中医医院山东济南250014

反流性食管炎是一种较为常见的消化系统疾病,是指胃及十二指肠内容物反流进入食管造成食管黏膜损伤而引起的食管炎症性病变。临床表现为反酸、烧心、胸骨后疼痛,如不进行积极有效的治疗,会导致食管狭窄引起吞咽困难,最终引起食管癌。该... 详细信息

反流性食管炎是一种较为常见的消化系统疾病,是指胃及十二指肠内容物反流进入食管造成食管黏膜损伤而引起的食管炎症性病变。临床表现为反酸、烧心、胸骨后疼痛,如不进行积极有效的治疗,会导致食管狭窄引起吞咽困难,最终引起食管癌。该病具有慢性、复发性和难以缓解的特点。近年来,伴随人们生活节奏的加快及饮食结构的转变,饮食不加节制,嗜食肥甘厚味,加之生活、工作压力过大,肥胖、饮酒、服用药物等,使反流性食管炎发病率呈递增趋势。大多数学者认为该病的发病机制主要为食管抗反流功能降低,目前通常以恢复食管抗反流功能、消除临床症状和降低并发症为主要治疗目的,临床上尚无特效药物,西药治疗方法单一且疗程较长。中医认为本病隶属于“嘈杂”“噎膈”等范畴,基本病机为胃失和降、胃气上逆,病因主要有饮食不节、情志失调、感受外邪等,病位主要在食管、肝、胆、脾、胃等。临床研究证实,中医药在治疗反流性食管炎方面具有良好的疗效,中西医结合、针灸、穴位按摩、电针等均有明显治疗效果,且可以减少现代医学常规治疗的不良反应,亦可以减少促胃动力药和抑酸药等西医常规药物的耐药性。

关键词：反流性食管炎中医综述