Apically guiding electron/mass transfer reaction induced by Ag/FeN_(x)Mott-Schottky effect within a hollow star reactor toward high performance zinc-air batteries

The disparity in the transfer of carriers(electrons/mass)during the reaction in zinc-air batteries(ZABs)results in sluggish kinetics of the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER),along with elevated overpotentials,thereby imposing additional constraints on its utilization.Therefore,the pre-design and target-development of inexpensive,high-performance,and long-term stable bifunctional catalysts are urgently needed.In this work,an apically guiding dual-functional electrocatalyst(Ag-FeN_(x)-N-C)was prepared,in which a hierarchical porous nitrogen-doped carbon with three-dimensional(3D)hollow star-shaped structure is used as a substrate and high-conductivity Ag nanoparticles are coupled with iron nitride(FeN_(x))nanoparticles.Theoretical calculations indicate that the Mott-Schottky heterojunction as an inherent electric field comes from the two-phase bound of Ag and FeN_(x),of which electron accumulation in the FeN_(x)phase region and electron depletion in the Ag phase region promote orientated-guiding charge migration.The effective modulation of local electronic structures felicitously reforms the d-band electron-group distribution,and intellectually tunes the masstransfer reaction energy barriers for both ORR/OER.Additionally,the hollow star-s haped hierarchical porous structure provides an apical region for fast mass transfer.Experimental results show that the halfwave potential for ORR is 0.914 V,and the overpotential for OER is only 327 mV at 10 mA cm^(-2).A rechargeable ZAB with Ag-FeN_(x)-N-C as the air cathode demonstrates long-term cycling performance exceeding 1500 cycles(500 h),with a power density of 180 mW cm^(-2).Moreover,when employing AgFeN_(x)-N-C as the air cathode,flexible ZABs demonstrate a notable open-circuit voltage of 1.42 V and achieve a maximum power density of 65.6 mW cm^(-2).Ag-FeN_(x)-N-C shows guiding electron/mass transfer route and apical reaction microenvironment for the electrocatalyst architecture in the exploration prospects of ZABs.

Structure-preserving algorithms for guiding center dynamics based on the slow manifold of classical Pauli particle

The classical Pauli particle(CPP) serves as a slow manifold, substituting the conventional guiding center dynamics. Based on the CPP, we utilize the averaged vector field(AVF) method in the computations of drift orbits. Demonstrating significantly higher efficiency, this advanced method is capable of accomplishing the simulation in less than one-third of the time of directly computing the guiding center motion. In contrast to the CPP-based Boris algorithm, this approach inherits the advantages of the AVF method, yielding stable trajectories even achieved with a tenfold time step and reducing the energy error by two orders of magnitude. By comparing these two CPP algorithms with the traditional RK4 method, the numerical results indicate a remarkable performance in terms of both the computational efficiency and error elimination. Moreover, we verify the properties of slow manifold integrators and successfully observe the bounce on both sides of the limiting slow manifold with deliberately chosen perturbed initial conditions. To evaluate the practical value of the methods, we conduct simulations in non-axisymmetric perturbation magnetic fields as part of the experiments,demonstrating that our CPP-based AVF method can handle simulations under complex magnetic field configurations with high accuracy, which the CPP-based Boris algorithm lacks. Through numerical experiments, we demonstrate that the CPP can replace guiding center dynamics in using energy-preserving algorithms for computations, providing a new, efficient, as well as stable approach for applying structure-preserving algorithms in plasma simulations.

Exploration and Practice of“Guiding Interactive”Teaching in Advanced Geochemistry Courses from the Perspective of Constructivist Theory

The construction of geochemical disciplines has brought new vitality to the development of traditional geology.In the new round of“Double First-Class”discipline construction at Central South University,the course of Advanced Geochemistry has effectively stimulated students’interest in learning and further improved their scientific thinking and research innovation skills through the implementation of“Guiding Interactive”teaching reform measures,which has important theoretical significance and practical value.

Without thought的“无意识”误区——深泽直人(Naoto Fukasawa,1956~)设计观念的思想基础及其开展路径阐析

日本设计师深泽直人提出的without thought本意为“无需思考”,在国内被翻译为“无意识设计”并广为传播,这在一定程度上导致我国学者过分强调该理念中的“无意识”内容而忽视其思想基础,还同时造成一些学者对该设计理念开展路径的误解。深泽直人设计观念的思想基础可以在生态心理学和禅学中找到来源,从个体意义到普遍价值,without thought中的无意识内涵则可从“行为—意义—价值”三个层面来理解。生态心理学和禅学皆有超越“二元”的思想特征,在认识方法上皆反对将他者对象化和主题化,与此呼应,深泽直人认为设计是一种直觉行为,并明确表明自己不用“分析—推理”的方式开展设计工作,概而言之,其接触“无意识”的设计路径旨在让设计者回到由感性直观构成的“生活世界”中,并以“具身性”的方式实现对他者的理解,通过这种“生命体验”扩展自我的边界,进而创造出具有“共感”的作品。

Marx's Agricultural Intensive Management Thought and Its Guiding Significance

Through analyzing Marx's agricultural intensive management thought,this paper points out that the existence and development of agricultural management mode experience historical course and the development of agricultural intensification depends on many objective conditions.On the basis of this,it discusses the guiding significance of Marx's agricultural intensive management thought to China's agricultural development.It is required to fully realize basic current situations of China's agriculture,widely popularize agricultural mechanization and electrification,speed up artificial transformation of soil structure,promote chemical application of agriculture,make rational use of water resource,and spread improved seeds.

梁启超的导读书目与导读思想

梁启超是开启近现代目录学研究一代风气的启蒙人物,他对导读书目的研究分成了西学书目与国学书目两大类型,并形成宣传西学与推崇国学两个明显的历史分期。梁启超开启的导读书目范式更加强调对读者、读物、读书法等的关注,带有突出的读者服务意识。梁启超的导读书目根植于中国目录学传统,开创了解题兼导读的新型书目,导读的范围兼涉中西,体现出明显的致用属性。

Adaptive energy-preserving algorithms for guiding center system

We develop two types of adaptive energy preserving algorithms based on the averaged vector field for the guiding center dynamics,which plays a key role in magnetized plasmas.The adaptive scheme is applied to the Gauss Legendre’s quadrature rules and time stepsize respectively to overcome the energy drift problem in traditional energy-preserving algorithms.These new adaptive algorithms are second order,and their algebraic order is carefully studied.Numerical results show that the global energy errors are bounded to the machine precision over long time using these adaptive algorithms without massive extra computation cost.

The Physical Universe and the Theoretical Value of Science:Reflections on the Thought of G.Leopardi

The essay has two main purposes.The first consists of discussing some literary and philosophical thoughts on the epistemological value of science by one of the most famous and celebrated poets in Italian literature,Giacomo Leopardi.The poet firmly believes in the cognitive power of science,capable of revealing false beliefs with the light of reason.However,in his mature reflections,what will radically change will not be the value of scientific activity itself,always admirably accepted,but rather its true salvific force.Leopardi was not a scientist,but he used the scientific culture of his time to critically address the great existential themes of man concerning nature and the universe.He had amply demonstrated a scientific culture since his youthful'History of Astronomy',which would reappear in many of his other literary works.His deep and meditative reflections on the nature of finite and infinite space and time are a clear and fruitful testimony to this.However,Giacomo writes icastically,reason alone is not enough;it needs imagination.The second concerns a first reconstruction of the influence that the philosophy of Enlightenment had on Leopardi’s thought especially in relation to these topics:atheism,rejection of providentialism and anthropocentrism,the conception of nature,the question of the relationship between human and animal intelligence,the rejection of metaphysics,the importance of scientific knowledge.

On Master Tanxu’s Thought of the Middle Way

This paper discusses Master Tanxu’s Thought of Middle Way from three aspects:interpreting the Middle Way with the Tiantai Sect’s thought of“Three Truths as a Unity”(三諦圓融),discussing“the Truth of the First Meaning of the Middle Way”(中道第一義諦)from the relationship between“the One Mind”and the Middle Way,and discussing gradations of practice of the Middle Way.

气管内超声引导纵隔肿瘤激光多点消融操作流程

由于纵隔解剖位置复杂,重要脏器较多,纵隔肿瘤的治疗一直是临床难点。相比传统局部治疗,气道内超声引导纵隔肿瘤激光多点消融具有较多优势,包括消融范围及效果可实时监控、避免损伤正常组织、不良反应少、耐受性好等。该文阐述了气管内超声引导纵隔肿瘤激光多点消融的操作流程。

新型长鞘在颈动脉重度狭窄血管内治疗路径建立的初步探讨

目的:探讨新型长鞘在颈动脉狭窄患者血管内治疗路径建立初步使用经验。方法:回顾性连续纳入2022年1月至2023年9月,首都医科大学附属北京安贞医院神经介入科、脑血管病科颈动脉(包括颈总动脉和颈内动脉C1段)重度狭窄(≥70%)患者,使用新型长鞘建立路径,收集一般资料、临床及影像资料等。共30例,颈总动脉狭窄者6例(20.0%),颈内动脉C1段狭窄18例(60.0%),颈总动脉、颈内动脉C1段共同受累者6例(20.0%)。既往同侧颈动脉狭窄伴脑梗死者21例(70.0%),短暂性脑缺血发作者9例(30.0%)。技术成功定义颈总动脉靶血管到位率及颈内动脉支架成形术后前向血流(改良脑梗死溶栓分级)(modified thrombolysis in cerebral infarction score,mTICI,mTICI)3级,且残余狭窄<30%为技术成功;技术失败定位为路径建立失败更改其他介入材料,围手术期并发症定义为术后30d内同侧颈动脉急性缺血性或出血性卒中和全因性死亡。结果:30例患者均患者手术成功。颈动脉支架置入术中1例出现短暂性全面性遗忘;术后随访30d同侧颈动脉脑梗死1例,未出现死亡并发症。结论:新型长鞘在颈动脉路径建立中是安全可行的,可增加迂曲颈总动脉通路导管到位率,减少路径建立过程中血管损伤。

Research on the Cultivation of Craftsmanship in Huang Yanpei’s Education Thought

Skilled talents are the main support for the strategic development of science and technology in China.The quality of talents is an important guarantee for the transformation and upgrading of national industries.By analyzing and studying Huang Yanpei’s thought on vocational education,this paper focuses on the cultivation of students’craftsmanship in vocational schools.First,we analyze the results of previous research and then elaborate on the connotations of Huang Yanpei’s education thought and craftsmanship spirit.Lastly,we propose five suggestions for the cultivation of craftsmanship.Our research work carries certain reference value to the study of craftsmanship cultivation in Huang Yanpei’s education thought.

基于Guided BERTopic模型的产业链关键核心技术识别与发展趋势研判--以未来工业互联网为例

产业链关键核心技术不仅是国之重器,而且对推动我国经济的高质量发展和保障国家安全起着至关重要的作用。当前,工业互联网产业链的关键技术发展成为我国的研究重点,该领域的重要性在2023年被提升至国家级重大研究计划。综合收集了1989-2024年中美两国在工业互联网领域的专利数据,基于《关键和新兴技术清单》和《未来工业互联网基础理论与关键技术重大研究计划》,构建了一套工业互联网产业链核心关键技术的种子词库。利用Guided BERTopic模型提取了产业链关键技术主题,并采用Logistic模型评估了这些技术的生命周期,进而对比中美两国的发展情况,提出了针对未来发展的建议。研究结果表明,相比美国,我国在大多数产业链核心技术方面仍处于成长阶段,而美国则已步入技术饱和阶段。展望未来,设备监测系统、设备管理系统、无线通信技术及能耗监测分析系统等被认为是具有巨大发展潜力的技术。研究提出了一种基于政策文件的产业链关键技术识别方法,并通过对工业互联网专利技术的实证分析,为制定相关政策提供了科学指导和建议。

习近平文化思想的科学内涵、价值意蕴与原创性贡献

确立习近平文化思想是推动实现中华民族伟大复兴的现实需要,也是正确应对国际领域复杂意识形态斗争的迫切需求。习近平文化思想深化了对文化本质和文化自信自强的认识,深化了对文化发展道路的认识,深化了对新时代文化使命的认识,深化了意识形态工作与党和国家中心工作之间关系的认识,深化了对意识形态阵地管理的认识。习近平文化思想回答了新时代我国文化建设举什么旗、走什么路、坚持什么原则、实现什么目标等根本问题,涵盖文化建设的方向、目标、道路、原则等重要方面,是相对完整的思想体系。要正确理解“两个结合”、特别是“第二个结合”,高度重视意识形态安全,在学思用贯通、知信行合一中把学习贯彻习近平文化思想引向深入。

AGV路径规划及避障算法研究综述

自动导向车(Automated Guided Vehicle,AGV)目前被广泛应用于物流、仓储、制造业和仓储等领域.AGV的路径规划和避障算法是实现AGV自主导航的关键技术,决定了AGV在复杂环境中能否高效、安全地完成任务,近年来成为AGV领域的重要研究热点之一.本文根据AGV路径规划及避障算法的原理与特点,将主流AGV路径规划及避障算法划分为局部避障路径规划算法、基于几何模型的路径规划算法、智能路径规划算法和混合算法4类,对算法的原理、工作流程、优缺点进行了深入分析,并介绍了相应的改进算法.最后,本文对AGV路径规划及避障的未来发展趋势进行展望,为AGV路径规划及避障算法的研究指出了方向.

导叶安装角度对离心泵叶轮结构特性的影响

为提高带导叶蜗壳式离心泵的运行稳定性,研究了不同导叶安装角度对离心泵性能及叶轮结构力学响应的影响.以某带导叶蜗壳泵为研究对象,首先对其进行流场数值模拟,再通过静态和瞬态结构分析模块将水压力载荷导入叶轮结构,以实现单向流固耦合分析,研究不同导叶安装角度下叶轮变形与等效应力变化规律,最后通过模态分析研究叶轮结构的振动特性.结果表明:随着导叶安装角度减小,泵的高效区向小流量工况偏移,并且最高效率逐渐增大,最大提高2.1%;单向流固耦合分析得到的稳态结果与瞬态结果规律一致,其中叶轮最大变形量和最大等效应力值都随流量的增大而减小,在设计工况附近,都随导叶安装角度的减小而减小,最大差值为3.3%,且最大等效应力值变化的幅值较小;预应力对叶轮干模态固有频率的影响可忽略不计,与干模态对比,湿模态下的固有频率有较显著下降.

数学基本思想在集合教学中的运用

为帮助学生全面深入地理解集合概念,对数学基本思想在集合教学中的运用进行了研究。数学基本思想一般包括抽象、推理与模型,教师从集合概念的抽象性、集合关系的抽象性出发,引导学生理解数学抽象思想;从集合推理运算的基础、集合恒等式的推理与证明出发,引导学生理解数学推理思想;从计数与概率论、数理逻辑中的集合模型出发,引导学生理解数学模型思想。

习近平文化思想的内涵、特征与核心要义

习近平文化思想是新时代党领导宣传思想文化建设经验的理论总结与思想提升,极大丰富和发展了马克思主义文化理论,在党的文化事业发展史上具有里程碑意义。从内涵看,习近平文化思想是以文化使命为统领,由文化传承、文化创新、文化权益、文化共识、文化引领等方面构成的完备理论体系。从特征看,习近平文化思想具有鲜明的科学性、人民性、实践性、发展性,不仅体现了习近平文化思想的本质,而且展现了习近平文化思想的理论形象。从核心要义看,习近平文化思想主要围绕保障文化安全、坚定文化自信、建设文化强国、增强文化影响等价值目标为新时代宣传思想文化建设提供思想武器和行动指南,为以中国式现代化全面推进中华民族伟大复兴坚定信念、振奋人心、凝聚力量。

导向注药套管经鼻悬吊留置伴或不伴锚定治疗肺部霉菌病的操作流程

全身使用有效抗霉菌药物是治疗肺部霉菌病的基础治疗方法,同时,经过内镜注药是气管、支气管和肺部霉菌病最重要的治疗方式之一。相比内镜注药,导向注药套管经鼻悬吊留置伴或不伴锚定治疗肺部霉菌病具有较多优势,包括可接驳注射泵持续缓慢地注入药物,可避免反复进行呼吸内镜等。该文介绍了导向注药套管经鼻悬吊留置伴或不伴锚定治疗肺部霉菌病的操作流程。

中和学术思想指导下小儿推拿特色实践与应用

小儿推拿疗法有确切的疗效、丰富的特色和悠久的历史,是中医儿科的一种重要治疗方法。中和学术思想系国医大师孙光荣创立,反复实践于临床,效果可靠,继而形成了“中和医派”。中和学术思想主张恪守中医临床思维,遵循辨证治疗六步程式,强调“中和辨证、中和组方、中和用药”,提出“调气血、平升降、衡出入”的治疗总则,这些思想对小儿推拿的作用、治则、选穴、辨证、手法、治疗套路等都有全新的指导,验之临床,颇有疗效。经多年实践形成了“严守中和理论,谨遵儿童特点;恪守中医思维,遵循经络穴位;注重调和气血,燮理阴阳平衡;兼顾升降平衡,手法轻快柔和;主张辨证施推,注重三因制宜;主症主穴主推,随症加减施推;重视穴位功效,简化手法套路;博采众家之长,融会贯通创新”的八大特色的中和小儿推拿疗法。