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Valorization of carbon dioxide with alcohols

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Chinese Chemical Letters 2024年第7期35卷 54-58页

作者： daheng Wen Weiwei Fang Yongmei Liu Tao Tu Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Department of ChemistryFudan UniversityShanghai 200438China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Utilizing CO_(2)for the production of bulky and valuable chemicals presents an attractive solution to address environmental and fossil energy *** the various approaches,direct carboxylation of alcohols with CO_(2)stands out as an eco-friendly process capable of efficiently producing carboxylic acids in a sustainable ***,the high dissociation energy of the C–O bond poses a significant challenge in this *** the past few decades,several strategies have been developed to activate alcohols and establish efficient catalytic systems for carboxylation with CO_(2).Nevertheless,the sporadic nature of reported approaches makes it difficult to determine the most effective *** perspective aims to provide an overview of the current state-of-the-art catalytic protocols for carboxylating alcohols with CO_(2),encompassing esterification,halogenation,and photocatalysis,while considering their respective advantages and *** aim to discern the most promising avenues for future development in this *** insights presented in this perspective will contribute to the advancement of efficient and sustainable carboxylation methods using CO_(2),leading to the production of valuable chemicals in future.

关键词： Carboxylation Carbon dioxide Alcohol Carboxylic acid Transition metal catalysis

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Human-robot object handover:Recent progress and future direction

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Biomimetic Intelligence & Robotics 2024年第1期4卷 1-13页

作者： Haonan Duan Yifan Yang daheng Li Peng Wang Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China Centre for Artificial Intelligence and Robotics Hong Kong Institute of Science and InnovationChinese Academy of SciencesHong Kong 999077China

Human-robot object handover is one of the most primitive and crucial capabilities in human-robot *** is of great significance to promote robots to truly enter human production and life scenarios and serve human in numerous *** progressions in the field of human-robot object handover have been made by *** article reviews the recent literature on human-robot object *** this end,we summarize the results from multiple dimensions,from the role played by the robot(receiver or giver),to the end-effector of the robot(parallel-jaw gripper or multi-finger hand),to the robot abilities(grasp strategy or motion planning).We also implement a human-robot object handover system for anthropomorphic hand to verify human-robot object handover *** review aims to provide researchers and developers with a guideline for designing human-robot object handover methods.

关键词： Human-robot interactions Object handover

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高性能自研处理器物理设计频率提升方法

计算机研究与发展 2024年第6期61卷 1429-1435页

作者：何小威乐大珩郭维隋兵才邓全国防科技大学计算机学院长沙410073 先进微处理器芯片与系统重点实验室(国防科技大学) 长沙410073

提升处理器核的频率是提升处理器性能的重要手段.传统的物理设计流程难以实现高主频的处理器核.基于业界主流的布局布线工具,通过嵌入手工定制部件的网表、逻辑和物理设计协同优化、优化定制布线规则、优化物理设计方法学等组合策略.在... 详细信息

提升处理器核的频率是提升处理器性能的重要手段.传统的物理设计流程难以实现高主频的处理器核.基于业界主流的布局布线工具,通过嵌入手工定制部件的网表、逻辑和物理设计协同优化、优化定制布线规则、优化物理设计方法学等组合策略.在相同工艺、面积、功耗对等条件下,达到流片签核要求时,自研处理器核物理设计频率比原始设计可提升约30%.

关键词：布局布线协同优化物理设计签核频率

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网络钓鱼检测研究

信息与电脑 2024年第10期36卷 24-27页

作者：刘大恒淮北理工学院安徽淮北235000

信息技术的发展是一把双刃剑,给用户带来便捷生活方式的同时也给用户带来网络攻击威胁。其中网络钓鱼是比较常见的攻击方式。因此,文章针对此现象提出基于敏感词分词方法的双向长短期记忆(Bidirectional Long Short-Term Memory,BLSTM)... 详细信息

信息技术的发展是一把双刃剑,给用户带来便捷生活方式的同时也给用户带来网络攻击威胁。其中网络钓鱼是比较常见的攻击方式。因此,文章针对此现象提出基于敏感词分词方法的双向长短期记忆(Bidirectional Long Short-Term Memory,BLSTM)网络模型钓鱼网站检测方案,从不同分词方法出发,对URL地址进行提取、整合,并对网络模型进行训练。实验表明,此方案能够有效检测网络钓鱼攻击。

关键词：钓鱼网站敏感词分词双向长短期记忆网络

One Step and In Situ Synthesis of Edible Lubricant-infused Surface Using All-in-one Solution

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Journal of Bionic Engineering 2023年第5期20卷 1879-1890页

作者： daheng Wang Jinxia Huang Zhiguang Guo State Key Laboratory of Refractories and Metallurgy Wuhan University of Science&TechnologyWuhan430081China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei UniversityWuhanChina

Edible Lubricant-Infused Surface(ELIS)was fabricated through antisolvent method by adding ethyl oleate(lubricant/antisolvent),ethanol(solvent)and shellac(solute/base layer of ELIS)into an all-in-one solution to in-situ prepare ELIS through single step of solvent *** ELIS comprising sub-micro-to micro-scaled shellac particles shows water and food liquid slippery,transparency,stability against abrasion and lubricant retaining ability against sheer *** all edible material to fabricated ELIS is a more efficient route for application when compared with other Lubricant-Infused Surface(LIS).Traditional fabrication for LIS included steps such as:base layer fabrication,lubricant infusion,excess lubricant removal,UV light treatment and chemical *** method proposed in this article could further simplify the preparation to an all-in-one solution and simplify the synthesis process to only 60-degree ***,Shellac ELIS coating could withstand abrasion and hold performance when compared with other ELIS coatings.

关键词： Bionic Wax particles Edible Hydrophobic Shellac

F-POSS透明疏水抗菌涂层的制备及其性能

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功能材料 2024年第9期55卷 9184-9190页

作者：王志曾祥会张荭杨震方伟杜星王大珩赵雷陈辉武汉科技大学省部共建耐火材料与冶金国家重点实验室江苏鸿晨集团有限公司

以物理气相沉积的方式，将聚合的笼型半硅氧烷材料(F-POSS)和抗菌剂吡啶硫酮锌沉积到玻璃表面，利用FT-IR、SEM、UV-Vis对其组成、形貌、光学性能进行表征，并通过对大肠杆菌和金黄色葡萄球菌进行细菌计数分析，对样品的抗菌能力进行了... 详细信息

以物理气相沉积的方式，将聚合的笼型半硅氧烷材料(F-POSS)和抗菌剂吡啶硫酮锌沉积到玻璃表面，利用FT-IR、SEM、UV-Vis对其组成、形貌、光学性能进行表征，并通过对大肠杆菌和金黄色葡萄球菌进行细菌计数分析，对样品的抗菌能力进行了评估。结果表明，所制备的涂层表面平整具有基体玻璃90%的透明度与118°的水接触角。涂层拥有优良的耐磨、冲击能力，具有一定自修复能力，并且对酸碱、高温等苛刻条件表现出了极佳的稳定性。同时，对常见的大肠杆菌和金黄色葡萄球菌都能在24 h内达到超过98%的杀菌能力。

关键词：疏水涂层透光率防污抗菌

EH500特厚海洋工程用钢多相组织调控及对性能的影响

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工程科学学报 2024年第11期46卷 2017-2025页

作者：高擎李骞白丽琴肖大恒周文浩于青谢振家尚成嘉华菱湘潭钢铁有限公司湘潭411100 北京科技大学钢铁共性技术协同创新中心北京100083 北京科技大学新金属材料国家重点实验室北京100083

特厚钢板心部轧制压缩比低和中心偏析的存在,导致其心部低温韧性差,这大大限制了高强度特厚钢板的应用.针对具有严重中心偏析的100 mm厚EH500海洋工程用钢,系统研究了两步临界热处理对多相组织调控及性能的影响.结果表明,实验钢经过740... 详细信息

特厚钢板心部轧制压缩比低和中心偏析的存在,导致其心部低温韧性差,这大大限制了高强度特厚钢板的应用.针对具有严重中心偏析的100 mm厚EH500海洋工程用钢,系统研究了两步临界热处理对多相组织调控及性能的影响.结果表明,实验钢经过740℃两相区临界退火,其屈服强度和抗拉强度分别为540 MPa和869 MPa,其延伸率和-40℃低温韧性很低,分别仅为5.1%和14 J.再经过600、660和680℃回火后,实验钢强度相差不大,屈服强度介于528~551 MPa,抗拉强度介于687 MPa~730 MPa.而实验钢的延伸率和低温韧性随着回火温度的升高先提高后下降,660℃回火时塑韧性最佳,延伸率达30.6%,-40℃夏比冲击功为163 J.显微组织表征结果表明,实验钢740℃两相区退火后显微组织为临界铁素体和马氏体组织,再经过600℃回火获得了临界铁素体、回火马氏体和细小碳化物的多相组织.回火温度为660℃时,实验钢为临界铁素体、回火马氏体以及细小残余奥氏体,且中心偏析区残余奥氏体含量明显高于非偏析区,进而显著改善了实验钢的塑韧性.而回火温度进一步升高到680℃时,实验钢在中心偏析区获得了临界铁素体、回火马氏体/贝氏体、少量残余奥氏体和大量马奥岛组织,马奥岛的存在使实验钢的塑韧性明显恶化.

关键词：特厚钢板临界热处理残余奥氏体中心偏析低温韧性

Transport property of topological crystalline insulator SnTe(100)and ferrimagnetic insulator heterostructures

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Journal of Materials Science & Technology 2022年第36期131卷 204-211页

作者： Anqi Zhang daheng Liu Teng Yang Song Ma Zhidong Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Topological crystalline insulator(TCI)SnTe is a potential material for quantum electronic devices because of its attractive inherent sensitivity of band topology and highly mobile characteristic of Dirac *** proximity effect at the interface of SnTe film can affect the topological surface transport and may result in novel quantum magneto-electric ***,we study the magnetoelectrical transport properties of SnTe thin films grown on ferrimagnetic insulators Eu_3Fe_5O_(12)(110)(EuIG(110))and Y_(3)Fe_(5)O_(12)(111)(YIG(111))single-crystal underlayers by molecular beam *** magnetic resistance(LMR)is observed in SnTe/Eu IG heterostructures in the low field range,which is different from the weak antilocalization(WAL)characteristic of SnTe/YIG ***,the double carrier characteristic with the coexistence of holes and electrons in SnTe/Eu IG heterostructure is quite different from the holes as main carriers in SnTe/YIG,although the SnTe layer remains the same crystal plane(100)in the two *** LMR in SnTe/Eu IG is attributed to the topological surface Dirac electrons and disordered domain distribution in the SnTe layer which is in sharp contrast to the WAL of SnTe/YIG with ordered domain distribution in the SnTe *** present studies of transport properties not only provide a fundamental understanding of the transport mechanism of TCI and magnetite insulator heterostructure but also display the promising application probability for tunable topological electronic devices.

关键词： Topological crystalline insulator Ferrimagnetic insulators Linear magnetoresistance Electrical transport Molecular beam epitaxy

弛豫时间对EH47特厚止裂钢组织与性能的影响

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钢铁 2024年第5期59卷 153-160,133页

作者：肖大恒李骞高擎周文浩谢振家尚成嘉湖南华菱湘潭钢铁有限公司技术质量部湖南湘潭411100 北京科技大学钢铁共性技术协同创新中心北京100083 北京科技大学新金属材料国家重点实验室北京100083

采用拉伸、冲击、无塑性转变(NDT)温度落锤等力学性能测试方法和光学显微镜、扫描电镜、电子背散射衍射等显微组织分析手段,研究了EH47钢轧后弛豫60、180和360 s对特厚钢组织性能的影响。结果表明,弛豫时间为60 s和180 s的试验钢1/4厚度... 详细信息

采用拉伸、冲击、无塑性转变(NDT)温度落锤等力学性能测试方法和光学显微镜、扫描电镜、电子背散射衍射等显微组织分析手段,研究了EH47钢轧后弛豫60、180和360 s对特厚钢组织性能的影响。结果表明,弛豫时间为60 s和180 s的试验钢1/4厚度(t/4)处屈服和抗拉强度相差不大,分别为518、538 MPa和641、655 MPa,而弛豫时间为360 s时,试验钢t/4屈服和抗拉强度明显降低,分别为474 MPa和553 MPa。试验钢t/4低温韧性和表面P-2型NDT落锤性能随弛豫时间从60 s增加至360 s呈先降低后增加趋势。弛豫60、180和360 s的试验钢t/4处-40℃冲击功分别为248、78和340 J,钢板表面-50℃P-2型NDT落锤性能分别为无开裂、开裂和无开裂。显微组织表征结果表明,弛豫时间对试验钢表面至t/4位置的显微组织具有显著影响。弛豫时间为60 s时,试验钢表面为板条贝氏体,t/4位置为针状铁素体加贝氏体;弛豫180 s时表面为贝氏体和呈网状分布铁素体,t/4位置为少量准多边形铁素体加贝氏体;弛豫360 s时表面为多边形铁素体加少量贝氏体,t/4为准多边形铁素体加针状铁素体。进一步研究表明,弛豫时间为180 s的试验钢,由于沿晶界分布的网状铁素体的存在,在低温落锤冲击时,应变主要集中在晶界铁素体中,从而形成孔洞,这种网状分布铁素体中的孔洞很容易串联形成裂纹而开裂。

关键词：止裂钢 EH47特厚板弛豫无塑性转变多相组织