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AI聊天机器人对学习者情绪体验和认知学习影响的元分析

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黑龙江高教研究 2025年第2期43卷 140-148页

作者：王胜兰钟燕兰长沙职业技术学院湖南长沙410217 华南师范大学广东广州510631 嘉应学院广东梅州514015

AI聊天机器人对学习者情绪体验与认知学习的影响,已成为学术研究的热点,但现有研究成果尚未形成统一结论,导致如何有效设计与运用AI聊天机器人的策略仍不明确。有鉴于此,构建AI聊天机器人对学习影响的作用机制框架,并以此为基础,对国际... 详细信息

AI聊天机器人对学习者情绪体验与认知学习的影响,已成为学术研究的热点,但现有研究成果尚未形成统一结论,导致如何有效设计与运用AI聊天机器人的策略仍不明确。有鉴于此,构建AI聊天机器人对学习影响的作用机制框架,并以此为基础,对国际上42项实验和准实验研究进行元分析。分析结果显示,AI聊天机器人能显著提升学习者情绪体验与认知学习成效,但这一积极影响受多重变量的调节,包括学习内容、学段、干预时长、AI聊天机器人的具体教学功能和设计特征等。基于这些发现,从产品开发、产品使用、技术精进、设计优化等四个角度提出具体的策略建议,以期为AI聊天机器人的高效应用提供科学依据。

关键词： AI聊天机器人情绪体验认知学习元分析

Enhanced subacute ischemic stroke treatment via multistage drug delivery system design for combination therapy

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Science China Chemistry 2025年

作者： Xihan Xu Juan-Juan Li Jiamin Li Hui-yan Zhang Yilin Qi Bing-Sen Shi Tianqi Li Shan-Shan Su Weitao Zhao Chang Chen Zhongying Gong Huiyu Liu Ke-Rang wang Dong-Sheng Guo Xue Xue State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Functional Polymer Materials (Ministry of Education) Frontiers Science Center for New Organic Matter Collaborative Innovation Center of Chemical Science and EngineeringNankai University College of Chemistry and Materials Science State Key Laboratory of New Pharmaceutical Preparations and Excipients Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education) Key Laboratory of Chemical Biology of Hebei Province Hebei Research Center of the Basic Discipline of Synthetic Chemistry Hebei University Department of Neurology Tianjin First Central Hospital School of Medicine Nankai University Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical Materials Bionanomaterials & Translational Engineering Laboratory Beijing Key Laboratory of BioprocessBeijing University of Chemical Technology

The management of acute ischemic stroke remains challenging due to its abrupt onset and the narrow treatment window,resulting in high rates of disability and *** therapy for neuroprotection and neurorepair strategies provided new hopes for subacute stroke *** we designed a multistage nanodelivery system that matches the unique microenvironment of the subacute phase of stroke,which utilizes calixarene as a building block to effectively load the neuroprotective drug *** calixarene is designed with glycosidic linkages targeting the glucose transporter 1 (GLUT1)on the blood-brain barrier (BBB) and azo bonds that are responsive to hypoxic ***,the decomposed calixarene molecules themselves possess intrinsic bio-activation to modulate inflammatory responses,achieving a multistage therapeutic approach that transitions from targeting to release and finally to *** approach combines anti-inflammation and neuroprotection,providing a multi-level treatment *** system was validated in a rat model of permanent middle cerebral artery occlusion (pMCAO),demonstrating that intravenous administration of the nanodelivery system repairs brain damage and improves motor function 24 h post-pMCAO *** work offers a precise and integrative strategy for stroke patients missing the acute therapy window to improve functional recovery and enhance the effect of comprehensive treatment.

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Induced generalized exact boundary synchronizations for a coupled system of wave equations

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Applied Mathematics(A Journal of Chinese Universities) 2020年第1期35卷 113-126页

作者： wang yan-yan School of Mathematical Sciences Fudan UniversityShanghai 200433China

Taking a coupled system of wave equations with Dirichlet boundary controls as an example,by splitting and merging some synchronization groups of the state variables cor-responding to a given generalized synchronization matrix,this paper introduces two kinds of induced generalized exact boundary synchronizations to better determine its generalized exactly synchronizable states.

关键词： Coupled system of wave equations generalized exact boundary synchronization determination of generalized exactly synchronizable states

BNIP3L介导的线粒体自噬在镉致大鼠大脑皮质神经元凋亡中的作用

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畜牧与兽医 2025年第1期57卷 50-56页

作者：闻双全王亮方兰袁燕苏州健雄职业技术学院江苏太仓215411 扬州大学兽医学院江苏扬州225009 江苏高校动物重要疫病与人兽共患病防控协同创新中心江苏扬州225009

为探究线粒体自噬受体Bcl-2/腺病毒E1B 19 kDa相互作用蛋白3样(BNIP3L)介导的线粒体自噬对镉致大鼠大脑皮质神经元凋亡的调控作用,利用RNA干扰技术建立大鼠大脑皮质神经元BNIP3L基因沉默模型,并经10μmol/L镉处理12 h,Western blot检测B... 详细信息

为探究线粒体自噬受体Bcl-2/腺病毒E1B 19 kDa相互作用蛋白3样(BNIP3L)介导的线粒体自噬对镉致大鼠大脑皮质神经元凋亡的调控作用,利用RNA干扰技术建立大鼠大脑皮质神经元BNIP3L基因沉默模型,并经10μmol/L镉处理12 h,Western blot检测BNIP3L、帕金森氏蛋白2(Parkin)和线粒体凋亡通路相关蛋白cleaved caspase-9、cleaved caspase-3的表达水平,免疫荧光染色检测BNIP3L与线粒体标志蛋白TOMM20共定位,透射电镜检测细胞内线粒体自噬体数目,FITC Annexin V染色检测细胞凋亡水平。结果:大鼠大脑皮质神经元经镉处理12 h后,BNIP3L蛋白表达水平极显著升高(P<0.01),BNIP3L与TOMM20共定位增加,沉默BNIP3L极显著抑制镉致Parkin线粒体转位(P<0.01),抑制镉致细胞内线粒体自噬体形成,极显著促进镉致caspase-9、caspase-3激活和神经元凋亡(P<0.01)。结果表明,BNIP3L介导的线粒体自噬可抑制镉致大鼠大脑皮质神经元凋亡。

关键词：镉大鼠大脑皮质神经元 BNIP3L 线粒体自噬凋亡

Dissolution of highly molecular weight cellulose isolated from wheat straw in deep eutectic solvent of Choline/L-Lysine hydrochloride

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Green Energy & Environment 2020年第2期5卷 232-239页

作者： Jiake wang yan wang Zhongzheng Ma Lifeng yan CAS Key Laboratory of Soft Matter Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of Chemical PhysicsiCHEMUniversity of Science and Technology of ChinaHefei230026China

Green solvents for cellulose dissolution is a key topic for green chemistry,especially natural cellulose with high molecular weight,and there are scarce solvents *** eutectic solvent(DES)is a typical kind of green solvent that has been attracted much attention ***,high molecular weight natural cellulose(DP>3000)was first isolated from wheat straw and then be directly dissolved in the choline/L-lysine(Ch/Lys)*** solution owns excellent stability,and the solubility reaches^5%.Rheological studies revealed that the natural cellulose can be well dispersed in the DES solution and showed gelation at high *** dissolved cellulose can be regenerated when the dilute acid aqueous solution was added into the *** provides an energy conversation and an environmentally friendly route to prepare a cellulose solution,which makes it possible to convert cellulose to valuable chemicals and materials in its homogeneous solution.

关键词： Deep eutectic solvent(DES) Choline/L-Lysine hydrochloride Wheat straw Natural cellulose Solvent

Optimal Military Spending,Trade and Stochastic Economic Growth

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Journal of Systems Science & Complexity 2016年第3期29卷 736-751页

作者： wang Dengshan wang yan School of Applied Science Beijing Information Science and Technology University Department of Systems Science Business SchoolUniversity of Shanghai for Science and Technology CEMA Central University of Finance and Economics

Based on the procedure of dynamic programming,this paper investigates the military spending,trade and wealth accumulation in a stochastic endogenous economic growth *** the Cobb-Dauglas utility function,explicit solutions of the optimal problem of the home country are ***,the optimal consumptions of domestic goods and foreign goods,the share of domestic capital stock and foreign bond holdings are derived *** comparative dynamic analysis shows that when intertemporal substitution in consumption is relative elastic,economic growth has a positive correlation with foreign military spending,has a negative correlation with variance of foreign military spending,and has a positive correlation with variance of capital or bonds if capital and bonds yields the same ***,in the case of inelasticity,variance of foreign military spending may stimulate or weaken economic development.

关键词： Foreign bond holdings military spending stochastic economic growth trade wealth accumulation.

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基于环形结构的无源编码超表面设计

新疆师范大学学报（自然科学版） 2025年第2期44卷 27-35页

作者：陈燕王静王本贤新疆师范大学物理与电子工程学院新疆发光矿物与光功能材料研究重点实验室新疆乌鲁木齐830054

编码超表面可通过编码序列调控空间波束方向,有利于无线通信系统目标用户定向传输和通信质量的提高。文章设计了工作在3.5 GHz的环形周期金属贴片的三层结构单元超表面,通过改变单元结构尺寸,得到基本编码单元,将编码单元按照不同方式排... 详细信息

编码超表面可通过编码序列调控空间波束方向,有利于无线通信系统目标用户定向传输和通信质量的提高。文章设计了工作在3.5 GHz的环形周期金属贴片的三层结构单元超表面,通过改变单元结构尺寸,得到基本编码单元,将编码单元按照不同方式排布,在此条件下实现单波束、双波束电磁波辐射。采用卷积运算的波束调控方法,垂直入射平面波激励下,反射波束角度的最大值由传统排布方式下的30°扩大至51°,而最小反射波束角度达到5°,为超表面上电磁波束的连续灵活调控提供了一种新思路。

关键词：编码超表面波束调控卷积运算

Y_(2)O_(3)弥散强化高速钢的激光选区熔化制备及性能

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工程科学学报 2025年第1期47卷 33-43页

作者：刘岩赵定国李月崔小杰王书桓薛月凯华北理工大学冶金与能源学院唐山063210

为提高高速钢的综合性能,利用行星式球磨机将M2高速钢(W_(6)Mo_(5)Cr_(4)V_(2))粉体与纳米尺寸的Y_(2)O_(3)颗粒进行低能球磨混合,并采用激光选区熔化制备Y_(2)O_(3)弥散强化M2高速钢.实验结果表明,球磨后的M2高速钢粉体基本呈球形,未... 详细信息

为提高高速钢的综合性能,利用行星式球磨机将M2高速钢(W_(6)Mo_(5)Cr_(4)V_(2))粉体与纳米尺寸的Y_(2)O_(3)颗粒进行低能球磨混合,并采用激光选区熔化制备Y_(2)O_(3)弥散强化M2高速钢.实验结果表明,球磨后的M2高速钢粉体基本呈球形,未发生严重变形,表面嵌布大量纳米级Y_(2)O_(3)颗粒.激光选区熔化成形的Y_(2)O_(3)弥散强化M2高速钢试样的致密度为98.3%,纵向微观组织主要为等轴晶和柱状枝晶,横向微观组织为等轴晶,平均晶粒尺寸为900 nm.X射线衍射结果显示Y_(2)O_(3)颗粒的加入对M2高速钢物相种类影响不大,仍由马氏体相、残余奥氏体相和碳化物组成.其抗拉强度达到了943 MPa,与未添加Y_(2)O_(3)颗粒的高速钢相比,强度提高了36%.

关键词：激光选区熔化 M2高速钢氧化物弥散强化激光电冶金力学性能

基于SBAS-InSAR和光学遥感的天津市北部山区潜在滑坡识别研究

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灾害学 2025年第1期40卷 30-35页

作者：王勇邢振涛李锁闫勇司甜天津城建大学地质与测绘学院天津300384 天津市地质工程勘测设计院有限公司天津300191

以天津市北部山区为研究对象,开展潜在滑坡识别研究,利用差分干涉测量短基线集时序分析技术(SBAS-InSAR)处理2018-01—2022-08的56景Sentinel-1A数据,并结合2018—2022年的Landsat8光学遥感影像,分析形变与光学遥感影像特征以及NDVI,筛... 详细信息

以天津市北部山区为研究对象,开展潜在滑坡识别研究,利用差分干涉测量短基线集时序分析技术(SBAS-InSAR)处理2018-01—2022-08的56景Sentinel-1A数据,并结合2018—2022年的Landsat8光学遥感影像,分析形变与光学遥感影像特征以及NDVI,筛选出潜在滑坡区域。研究结果表明:基于SBAS-InSAR技术识别的天津北部山区的形变较大区域有20处,使用光学遥感影像结合各发育环境要素进行处理确定的区域有19处,其中5处经两种技术确认为滑坡隐患,通过对该5处沉降信息进行识别分析,该5处区域最大年形变速率可达-12 mm/a,需要进行重点监测预警,使用两种技术结合对滑坡隐患区域进行识别可以有效地提高识别准确度,为天津北部山区灾害监测提供新的方式。

关键词：潜在滑坡 SBAS-InSAR 光学遥感影像天津市北部山区