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长江经济带数字经济发展水平测度及其空间效应研究

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价格理论与实践 2024年第2期 154-158,223页

作者：陈瑶(译) 陈辉民曾志文中国社会科学院生态文明研究所湖南工程学院经济学院湘潭大学商学院

数字经济是长江经济带发展新质生产力的着力点。本文基于长江经济带11省(直辖市)(1)2013-2020年的面板数据,利用多种方法对长江经济带数字经济发展水平进行测度并总结其时空特征,采用动态空间杜宾模型探索各因素对数字经济的影响程度。... 详细信息

数字经济是长江经济带发展新质生产力的着力点。本文基于长江经济带11省(直辖市)(1)2013-2020年的面板数据,利用多种方法对长江经济带数字经济发展水平进行测度并总结其时空特征,采用动态空间杜宾模型探索各因素对数字经济的影响程度。结果表明:(1)样本期内长江经济带数字经济发展水平持续增长的同时差异逐年缩小;(2)数字经济发展水平表现出正向空间溢出效应,整体具有“下游恒高上中游略低”的特征,局部以高—高聚集与低—低聚集为主;(3)产业结构升级、开放水平提高、城乡协调发展、教育水平与城市化建设强度提升有利于促进数字经济发展,并产生正向空间溢出效应。鉴于此,提出完善数字经济政策体系、坚持一体化与差异化战略相结合、加大关键核心技术研发力度等建议。

关键词：长江经济带数字经济时空格局演变空间杜宾模型

高职食品类专业《仪器分析》信息化教学实践探索

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林业科技情报 2024年第2期56卷 244-246页

作者：曾智文李翔湖南环境生物职业技术学院公共基础课部湖南衡阳421005 湖南环境生物职业技术学院医药技术学院湖南衡阳421005

探索运用信息化教学资源构建教学场景,破解高职食品类专业仪器分析课程实训难点。实践结果表明,通过信息化资源的建设和应用,能有效提升课程的教学效果,培养了学生自主学习的习惯,夯实学生的专业基础岗位能力,提高学生操作技能、发现问... 详细信息

探索运用信息化教学资源构建教学场景,破解高职食品类专业仪器分析课程实训难点。实践结果表明,通过信息化资源的建设和应用,能有效提升课程的教学效果,培养了学生自主学习的习惯,夯实学生的专业基础岗位能力,提高学生操作技能、发现问题和解决问题的能力。

关键词：仪器分析食品类专业信息技术职业教育

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术后急性疼痛与睡眠障碍相互影响的研究进展

临床麻醉学杂志 2024年第5期40卷 553-556页

作者：李辉波苏钰淇曾志文梅州市人民医院麻醉一科广东省梅州市514031 西安交通大学第一附属医院麻醉科

术后急性疼痛和睡眠障碍均是围术期管理的重大挑战,两者相互影响,疼痛可干扰术后睡眠,睡眠障碍则会导致痛觉敏化,加剧术后疼痛。目前两者相互影响机制尚未明确,防治策略尚缺乏统一的标准。因此,本文通过综述术后急性疼痛和睡眠障碍的定... 详细信息

术后急性疼痛和睡眠障碍均是围术期管理的重大挑战,两者相互影响,疼痛可干扰术后睡眠,睡眠障碍则会导致痛觉敏化,加剧术后疼痛。目前两者相互影响机制尚未明确,防治策略尚缺乏统一的标准。因此,本文通过综述术后急性疼痛和睡眠障碍的定义、危害、相互影响机制及防治与管理策略的研究现状,以期为防治围术期并发症提供参考。

关键词：疼痛急性疼痛睡眠睡眠障碍

Event-triggered encirclement control of multi-agent systems with bearing rigidity

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Science China(Information Sciences) 2017年第11期60卷 91-108页

作者： Yangguang YU zhiwen zeng Zhongkui LI Xiangke WANG Lincheng SHEN College of Mechatronics & Automation National University of Defense Technology State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Aerospace EngineeringCollege of Engineering Peking University

In recent years, the problem of multi-agent encirclement has attained much attention and was extensively studied. However, few work consider the factor that the on-board calculation as well as the communication capacity in the multi-agent system is limited. We investigate the encirclement control by employing the newly developed bearing rigidity theory and event-triggered mechanism. Firstly, in order to reduce the onboard loads,the event-triggered mechanism is considered in the framework and further an event-triggered control law based on bearing rigidity is proposed. The input-to-state stability(ISS) of networked agents is also analyzed by using the Lyapunov method and the cyclic-small-gain theory. In addition, the lower bound for the inter-event times is provided. Finally, to verify the efficiency and feasibility of the proposed encirclement control law, numerical experiments are investigated.

关键词： encirclement control event-triggered multi-agent system bearing rigidity

Chiral nanoporous networks featuring various chiral vertices from an achiral molecule on Ag(100)

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Nano Research 2022年第4期15卷 3753-3762页

作者： Dong Han Tao Wang Jianmin Huang Xingyu Li zhiwen zeng Junfa Zhu National Synchrotron Radiation Laboratory Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesUniversity of Science and Technology of ChinaHefei 230029China

Chiral nanoporous nanoarchitectures exhibit potential applications in various fields including chiral separation,sensing and ***-dimensional(2D)supramolecular chemistry offers novel methods to build chiral nanoporous networks from achiral ***,we report a series of chiral nanoporous networks built by an achiral precursor molecule via a stepwise annealing strategy on Ag(100).The nanoporous network morphologies and structural details are characterized by high-resolution scanning tunneling microscopy(STM).It is revealed that all vertices within networks are *** chiral vertices are either dimeric,trimeric,or *** connection of these chiral vertices gives rise to diverse chiral nanopores with varying shapes and sizes.A strict chirality correlation between nanopores and their vertices is ***,enantiomeric vertices of one-pair nanopore enantiomers are always in identical type but opposite *** work serves as a model to investigate the influence of vertex chirality on nanopore chirality of a supramolecular *** attained chiral nanopores could potentially be utilized as templates for surface reaction,chiral recognition,*** mirror-symmetric silver adatoms clusters dictated by chiral nanopore are discerned.

关键词： two-dimensional chirality chiral nanoporous networks chiral vertices scanning tunneling microscopy

Coaxial-printed small-diameter polyelectrolyte-based tubes with an electrostatic self-assembly of heparin and YIGSR peptide for antithrombogenicity and endothelialization

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Bioactive Materials 2021年第6期6卷 1628-1638页

作者： zhiwen zeng Chengshen Hu Qingfei Liang Lan Tang Delin Cheng Changshun Ruan Research Center for Human Tissue and Organs Degeneration Institute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055PR China University of Chinese Academy of Sciences Beijing100049PR China

Low patency ratio of small-diameter vascular grafts remains a major challenge due to the occurrence of thrombosis formation and intimal hyperplasia after *** developing the functional coating with release of bioactive molecules on the surface of small-diameter vascular grafts are reported as an effective strategy to improve their patency ratios,it is still difficult for current functional coatings cooperating with spatiotemporal control of bioactive molecules release to mimic the sequential requirements for antithrombogenicity and ***,on basis of 3D-printed polyelectrolyte-based vascular grafts,a biologically inspired release system with sequential release in spatiotemporal coordination of dual molecules through an electrostatic self-assembly was first described.A series of tubes with tunable diameters were initially fabricated by a coaxial extrusion printing method with customized nozzles,in which a polyelectrolyte ink containing of ε-polylysine and sodium alginate was ***,dual bioactive molecules,heparin with negative charges and Tyr-Ile-Gly-Ser-Arg(YIGSR)peptide with positive charges were layer-by-layer assembled onto the surface of these 3D-printed *** to the electrostatic interaction,the sequential release of heparin and YIGSR was demonstrated and could construct a dynamic microenvironment that was thus conducive to the antithrombogenicity and *** study opens a new avenue to fabricate a small-diameter vascular graft with a biologically inspired release system based on electrostatic interaction,revealing a huge potential for development of small-diameter artificial vascular grafts with good patency.

关键词： Coaxial extrusion printing Electrostatic self-assembly Sequential release Antithrombogenicity Endothelialization

RL and AHP-Based Multi-Timescale Multi-Clock Source Time Synchronization for Distribution Power Internet of Things

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Computers, Materials & Continua 2024年第3期78卷 4453-4469页

作者： Jiangang Lu Ruifeng Zhao zhiwen Yu Yue Dai Kaiwen zeng Electric Power Dispatching and Control Center Guangdong Power Grid Co.Ltd.Guangzhou510600China

Time synchronization(TS)is crucial for ensuring the secure and reliable functioning of the distribution power Internet of Things(IoT).Multi-clock source time synchronization(MTS)has significant advantages of high reliability and accuracy but still faces challenges such as optimization of the multi-clock source selection and the clock source weight calculation at different timescales,and the coupling of synchronization latency jitter and pulse phase *** this paper,the multi-timescale MTS model is conducted,and the reinforcement learning(RL)and analytic hierarchy process(AHP)-based multi-timescale MTS algorithm is designed to improve the weighted summation of synchronization latency jitter standard deviation and average pulse phase ***,the multi-clock source selection is optimized based on Softmax in the large timescale,and the clock source weight calculation is optimized based on lower confidence bound-assisted AHP in the small *** shows that the proposed algorithm can effectively reduce time synchronization delay standard deviation and average pulse phase difference.

关键词： Multi-clock source time synchronization(TS) power Internet of Things reinforcement learning analytic hierarchy process

外周炎症指标与青少年精神障碍患者非自杀性自伤行为的相关性:一项倾向性评分匹配分析

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国际精神病学杂志 2024年第4期51卷 1095-1099页

作者：孟茂林曾志文刘玉珍马莹杜启峰蒋廷云章杰中山市第三人民医院中山528451

目的探索外周炎症炎性指标与青少年精神障碍患者非自杀性自伤(non-suicidal selfinjury,NSSI)行为的相关性。方法本研究选取中山市第三人民医院2021年5月~2022年4月期间就诊的青少年精神障碍患者,依据是否伴有NSSI行为,将患者区分为NSS... 详细信息

目的探索外周炎症炎性指标与青少年精神障碍患者非自杀性自伤(non-suicidal selfinjury,NSSI)行为的相关性。方法本研究选取中山市第三人民医院2021年5月~2022年4月期间就诊的青少年精神障碍患者,依据是否伴有NSSI行为,将患者区分为NSSI及非NSSI两组。采用倾向性评分匹配(Propensity Score Matching,PSM)进行NSSI组与非NSSI组的1:1倾向性评分匹配,比较PSM成功后两组患者外周血中超敏C反应蛋白(hypersensitive C-reactive protein,hs-CRP),中性粒细胞淋巴细胞比例(neutrophil-to-lymphocyte ratio,NLR)的水平差异,并对比不同炎性学参数对于NSSI行为的预测效能。结果本研究共选取了150名患者,其中93例诊断为NSSI。PSM后,NSSI组和非NSSI组各有37例患者,两组社会人口学及心理学方面的基线达到平衡。NSSI组患者NLR,hs-CRP均显著高于非NSSI组(P<0.05);其中hs-CRP的曲线下面积更大(AUC=0.891),预测效能最佳。结论NLR,hs-CRP,等外周炎症指标与青少年精神障碍患者非自杀性自伤行为的发生存在显著相关性,其中hs-CRP对于NSSI行为的预测效能最佳,为早识别,早干预NSSI行为的提供临床依据。

关键词：非自杀性自伤青少年精神障碍炎症

High-speed Trajectory Tracking Based on Model Predictive Control for Omni-directional Mobile Robots

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High-speed Trajectory Tracking Based on Model Predictive Con...