Hollow micro/nanostructures metal oxide as advanced anodes for lithium-ion batteries

电动汽车和智能电网的快速发展对锂离子电池提出了更高的要求,即在拥有高能量密度和高功率密度的同时,兼有快速充放电和较高的安全性能。电极材料是电池性; 能的关键,金属氧化物因为拥有较高的比容量和安全性能,已经成为有希望替代传统商用石墨负极的新型电极材料。然而,金属氧化物负极的循环结构稳定性较差、; 电导率低,由此导致差的循环及倍率性能,极大地阻碍了其商业化应用。近年来,拥有微纳米空心结构的金属氧化物显示出了优异的电化学性能。本文介绍了制备空; 心结构金属氧化物的常用方法,讨论了各种方法的优缺点,并列举了常见空心结构金属氧化物作为锂离子电池负极时的性能表现,最后对空心结构金属氧化物未来的; 发展方向和发展前景予以展望。More efforts are needed to upgrade the performances of lithium-ion; batteries (LIBs) for their further applications in various large; electrical appliances such as electric vehicles and smart grid as these; devices require high capacity, power density, high rate capability and; especially safety. Electrode materials are the key to the performance of; LIBs. Recently, metal oxides with much higher capacities and better; safety have the prospect of becoming alternative anode materials of; commercial graphite. However, the intrinsic low charge/ionic; conductivity and poor cycling structural stability lead to poor cycling; and rate performances, which greatly hinder their commercial; applications. To overcome these disadvantages of metal oxide anodes for; LIBs, several strategies have been developed during the past decade.; Among them, metal oxide hollow micro-nanostructures exhibit excellent; electrochemical properties as anode material for LIBs. In this review,; we first describe the current commonly preparation methods to synthesize; metal oxide hollow structures and comment on their advantages and; shortages. According to some typical examples, we show the promising use; of metal oxides hollow-structured anode materials for LIBs. Finally, the; direction and prospect of metal oxide hollow micro-nanostructures using; as anode materials are further discussed.国家重点研究计划纳米科技重点专项; 国家自然科学基金; 福建省自然科学基金项目; 厦门大学校长基

The development of online detecting system of five-axis CNC grinding machine for indexable insert

五轴可转位刀片磨床具有高速、高精的特点,为了使所磨的刀片符合精度要求,需要针对刀片的尺寸开发一种在线检测系统。本文所介绍的在线检测系统主要由两方面构成:一是在磨床数控系统中将测头伸缩时发出的电压信号转换为测量值;二是建立刀片尺寸的加工模型。在线检测系统通过调用系统的测量宏程序,获取刀片测量值,将此测量值输入到加工模型中,得到所加工刀片的指导尺寸。通过实验,得到了刀片的指导尺寸和测量时间,验证了此在线检测系统是可行并且可靠的。The five-axis CNC grinder of indexable insert is characterized by high-speed and high-precision.,in order to meet the accuracy requirements of grinding blades, needed an online detection system developed for the size of the blade.The online detection system described in this article consists of two aspects: First, the voltage signal that when the probe telescopics will be converted to the measured value; Second, establishing the process model of the blade size.The online detection system will get the blade measurements by calling the measure macro, then the measured value input into the process model, obtaining the guidance blade size.Through the experiment, verifying this online detection system is feasible and reliable by the obtained guidance blade size and the measuring time.国家“高档数控机床与基础制造装备”科技重大专项资助(2010ZX04001-162

High School Students’ Intention to Reside in Kitakyushu and Their Affecting Factors: Evidence from a Survey of High School Students’ Attitudes in Kitakyushu City

Kitakyushu City faces the challenge of a declining population and aims to improve its social dynamics by promoting the settlement of young people. This study used data from a questionnaire survey conducted among high school students in the city to quantitatively analyze where high school students would like to live after graduation and the factors that influence their answers. To promote residence of high school students in Kitakyushu, it is important to foster the IT industry, build relationships between high school students and universities in the city, realize a society where women are active, and promote a safe and secure image of the city.research repor

声触诊弹性成像与二维剪切波弹性成像检测肝脏硬度的比较

目的将声触诊弹性成像（STE）和二维剪切波弹性成像（2D-SWE）检测肝脏硬度进行比较，为STE新技术的临床应用提供循证依据。方法采用 STE和2D-SWE技术，对43例健康志愿者和63例肝硬化患者行肝硬度检测，对比分析两种技术的检测成功率、操作者内重复性、测值相关性和测值差异。结果肝脏STE、2D-SWE检测成功率分别为100%（106/106）、96.2%（102/106）（χ2=2.320，P=0.128），4例2D-SWE检测失败的均为肝硬化患者。在健康组STE测值高于2D-SWE[5.83(5.30~6.37) kPa vs 5.00(4.80~5.20) kPa，Z=4.419，P<0.001]、肝硬化组低于2D-SWE [15.82(11.71~25.02) kPa vs 18.50(11.95~29.93) kPa，Z=-2.981，P=0.003]。STE和2D-SWE两种技术的测值相关系数为0.896（95%CI：0.849~0.928，P<0.001）。结论STE检测成功率高、重复性好，尤其在肝硬化患者穿透性好、与2D-SWE比较更具优势；STE测值与2D-SWE不直接等同，临床应用中需要注意

Do local governments' efforts to achieve the SDGs contribute to regional revitalization and local development?

In this paper, we studied the impact of local governments’ SDGs promotion status on regional revitalization. The results showed that for all municipalities, the relationship between the status of SDGs promotion and regional revitalization was not statistically significant. However, subsample analysis based on population size, the coefficient of SDGs promotion status was statistically significantly positive for municipalities with populations between 50,000 and 200,000 (medium-size municipalities), indicating that the effect of SDGs promotion on regional revitalization is heterogeneous by population size. It is suggested that promoting the SDGs in medium-size municipalities will promote regional revitalization by increasing the moving in rate and taxable income per taxpayer.research repor

北九州学術研究都市における留学生の地元就職促進策

北九州学術研究都市（以下、「学研都市」という）は、2001 年 4 月に「アジアに開かれた 学術研究都市」として、「新たな産業の創出・技術の高度化」を目指して、福岡県北九州市 若松区にオープンした研究開発・産学連携拠点である。この学研都市では、北九州市立大 学・大学院（公立）、九州工業大学大学院（国立）、早稲田大学大学院（私立）、福岡大学大 学院（私立）が教育・研究活動を行っており、2024 年 6 月現在、約 800 名の高水準の留学 生（主に「環境技術」と「情報技術」を専攻する理工系の大学院生）が在籍している。 北九州市は、留学生のために奨学金の提供、キャンパスライフのサポート、就職の支援、 など様々な支援活動を行っている。しかし、留学生の地元就職率は、期待したように伸び ていない。地方財政が厳しくなっている中、留学生に対する公的な支援を続けるためには、 留学生の地元就職率を高めることが求められている。 本調査研究プロジェクト（実施者：アジア成長研究所（AGI）研究部）は、北九州市産業 経済局未来産業推進課の委託で、学研都市における留学生の卒業（修了）後の就職地選択 行動に関するアンケート調査結果から、留学生の就職地選択行動の影響要因と地元就職の 促進策を探るものである。この報告書は 5 節から構成される。次の第 2 節では、アンケー ト調査に参加した留学生の特徴を概観する。第 3 節ではこれら留学生の卒業後の就職地選 択行動を考察する。第 4 節では留学生の就職地選択行動の影響要因を分析する。最後の第 ５節では、学研都市の留学生の地元就職の促進策を提案する。research repor

Addition of alkynes and osmium carbynes towards functionalized dπ-pπ conjugated systems

碳-碳三键和碳-金属三键是两类高度不饱和的化学键。该工作发现了这两类三键之间的全新反应模式。利用该反应能把金属和有机π共轭体系有效结合，得到一类金属d轨道参与π共轭的全新大π共轭体系。化学化工学院夏海平教授课题组碳龙化学研究取得新进展，利用金属卡拜与炔烃的新反应，成功地合成了一类金属d轨道参与π共轭的全新共轭体系并在有机太阳能电池领域得到应用。该工作是在夏海平教授和南方科技大学何凤副教授共同指导下完成的。化学化工学院2016级iChEM博士生陈仕焰和南科大博士生刘龙珠为论文的共同第一作者。该工作充分体现了多学科协同创新研究优势：相关化合物合成、表征由陈仕焰、高翔、彭丽霞、张颖等完成；光电测试由刘龙珠完成；理论计算由陈仕焰、华煜晖完成。化学化工学院杨柳林副教授、谭元植教授等对研究工作给予了大力支持。【Abstract】The metal-carbon triple bonds and carbon-carbon triple bonds are both highly unsaturated bonds. As a result, their reactions tend to afford cycloaddition intermediates or products. Herein, we report a reaction of M≡C and C≡C bonds that affords acyclic addition products. These newly discovered reactions are highly efficient, regio- and stereospecific, with good functional group tolerance, and are robust under air at room temperature. The isotope labeling NMR experiments and theoretical calculations reveal the reaction mechanism. Employing these reactions, functionalized dπ-pπ conjugated systems can be easily constructed and modified. The resulting dπ-pπ conjugated systems were found to be good electron transport layer materials in organic solar cells, with power conversion efficiency up to 16.28% based on the PM6: Y6 non-fullerene system. This work provides a facile, efficient methodology for the preparation of dπ-pπ conjugated systems for use in functional materials.This research was supported by the National Natural Science Foundation of China (Nos. U1705254, 21931002, and 21975115), Guangdong Provincial Key Laboratory of Catalysis (No. 2020B121201002), Shenzhen Nobel Prize Scientists Laboratory Project (no.C17783101), and the National Key R&D Program of China (2017YFA0204902). We thank the SUSTech Core Research Facilities for the Holiba-UVISEL measurements. 研究工作得到了国家自然科学基金(U1705254、21931002、21975115)，广东省催化化学重点实验室(No. 2020B121201002)，国家重点研发计划(2017YFA0204902)，及深圳诺贝尔奖科学家实验室(C17783101)等项目资助

某框架 - 剪力墙结构抗震设计分析

某框架 - 剪力墙办公（公寓）楼，采用钢筋混凝土框架 - 剪力墙结构，场地类别 IV 类、抗震设防烈度为 7 度（0.15g），剪力墙抗震等级为二级，抗震构造措施等级为一级，框架抗震等级为三级，抗震构造措施等级为二级。采用 YJK2.0 进行多遇地震下的结构计算分析。针对本工程设计中出现的难点，提出有效的解决办法，可供类似工程参考。</jats:p

设计优化在北京某住宅项目中的应用

论文结合中国北京某住宅项目，在保证安全可靠的前提下分析研究设计优化工作，本着科学、客观、公正的原则提出设计咨询意见与建议，促进设计的优化和完善，以达到为建设单位节约投资额、控制设计质量的目的，从而为建设单位带来良好的经济效益和社会效益。</jats:p

清代司法实践中的产权制度:若干评议

彭凯翔,河南大学经济学院教授;电子邮箱:[email protected]。【摘要】对于清代产权制度的形态与效率一直存在争议,本文通过对司法实践的考察表明,清代在“业权”的表达下形成了覆盖广泛的产权配置,而且私有产权是其基本形态。同时,在产权的形成与维护中,正式的法律制度尽管较少直接起作用,但一方面,它对私人契约、民间惯例的认可将这些非正式的安排纳入到了官方的司法活动中,使其具有了习惯法的意义,另一方面,正式制度提供的官僚治理体系加强了该习惯法的法定强制力,提高了产权维护的效率。这些均为清代市场经济的发展提供了制度基础。此外,尽管清代的习惯法并未演变成某种“普通法”,但正式制度与非正式制度的整合是无可否认的,这也意味着以非正式、人格化等类型化的方式来看待传统制度可能会错过其中真正的关键之处