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Chemical Research in Chinese Universities 2024年第2期40卷 305-310页

作者： CHEN Yanyue LIU Jiali LIU Jiawen HU Rong yang yunhui ZHANG Xiaobing College of Chemistry and Chemical Engineering Yunnan Normal UniversityKunming650500P.R.China Molecular Science and Biomedicine Laboratory State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringCollaborative Innovation Center for Molecular Engineering for TheronasticsHunan UniversityChangsha410082P.R.China

The insufficient internal resorption of iodide ions(I−)leads to thyroid disorders,such as goiter,hypothyroidism,and cretinism in *** this paper,a portable point-of-care testing(POCT)platform was developed for the dual-modal analysis of I^(−),seamlessly integrating both colorimetric and photothermal thermometer *** quantification of results was achieved using a standard thermometer or smartphone.G-Quadruplex/Hemin(G4/Hemin)is the DNAzyme with peroxidase-like *** catalytic efficacy of G-quadruplex structures can be enhanced with the help of I^(−),manifesting as multicolor transitions from colorless to green and then blue,and accompanied by the increase of temperature,which can be used for the quantitative detection of I^(−).Additionally,digital analysis according to the three-color channels(R/G/B)by a cellphone eliminated the requirement for intricate *** dual-modal method for portable I^(−)determination is cost-effectiveness,simplicity,remarkable sensitivity(0.5 nmol/L)and ***,it was applied to determining the concentration of I^(−)in spiked serum samples.

关键词： Dual-modal platform G-Quadruplex Iodide ion Point-of-care testing(POCT) Aptasensor

Recent Advances in Mn,Fe,Co,and Ni-Catalyzed Organic Reactions

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CCS Chemistry 2024年第3期6卷 537-584页

作者： Lu-Jie Li Yuli He yunhui yang Jun Guo Zhan Lu Congyang Wang Shaolin Zhu Shou-Fei Zhu College of Chemistry Nankai UniversityTianjin 300071 School of Chemistry and Chemical Engineering Nanjing UniversityNanjingJiangsu Province 210093 Institute of Chemistry Chinese Academy of Sciences and University of Chinese Academy of SciencesBeijing 100190 Department of Chemistry Zhejiang UniversityHangzhouZhejiang Province 310058

This paper reviewed the recent research progress of organic reactions catalyzed by four typical earthabundant and 3d metal catalysts:Mn,Fe,Co,and Ni complexes and mainly focused on the reactions in which these 3d metal catalysts exhibited obvious advantages over other *** mechanism that makes these 3d metal catalysts show unusual properties is another focus of this *** outlook on 3d metal complexes-catalyzed organic reactions was also considered.

关键词： Earth-abundant metal catalysts sustainable organic synthesis structure-function relationships organometallic intermediates hydrocarbon transformations

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机械加工中有限元技术的计算精度优化研究

电子科技 2024年第3期37卷 98-102页

作者：杨云辉云南开放大学机电工程学院云南昆明650500

有限元模型技术被广泛应用于机械加工领域,其也是实现数字控制与现代加工的核心理论技术,得到了各领域研究者的广泛关注与深入探讨。基于有限元模型的计算仿真模拟技术能够大幅提升机械加工制造的精度,大量的机械加工零件实验也为有限... 详细信息

有限元模型技术被广泛应用于机械加工领域,其也是实现数字控制与现代加工的核心理论技术,得到了各领域研究者的广泛关注与深入探讨。基于有限元模型的计算仿真模拟技术能够大幅提升机械加工制造的精度,大量的机械加工零件实验也为有限元模型提供详细的数据参考。文中通过总结有限元分析技术的研究历史,分析归纳了当前有限元分析技术中精度优化的核心策略及其不足之处,展望了在机械加工过程中有限元分析技术的未来发展方向。

关键词：机械加工有限元模拟计算精度残余应力误差函数数值分析正交切削工件寿命

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数字化融合赋能制造业技术创新——基于电子信息制造业的实证分析

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科技和产业 2024年第1期24卷 231-238页

作者：陈旭升杨云慧张晋硕哈尔滨理工大学经济与管理学院哈尔滨150040

数字化融合实现了制造业网络化和信息化,促进了制造业生产加工过程技术创新。通过构建面板数据模型,对数字化融合与制造业技术创新关系进行分析。研究发现:数字化融合对制造业技术创新水平具有显著促进作用,影响效应在技术密集型制造业... 详细信息

数字化融合实现了制造业网络化和信息化,促进了制造业生产加工过程技术创新。通过构建面板数据模型,对数字化融合与制造业技术创新关系进行分析。研究发现:数字化融合对制造业技术创新水平具有显著促进作用,影响效应在技术密集型制造业中最优,劳动密集型制造业中次之,资本密集型制造业中最小;制造业研发投入起中介作用,数字化融合可促进研发人员和研发经费增长,从而进一步提高制造业技术创新水平。

关键词：数字化融合赋能技术创新中介效应

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大规模加砂压裂完井工具冲蚀定量模拟计算及工具优化

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油气井测试 2024年第4期33卷 37-43页

作者：伍强杨云徽刘生国张瑶中石化西南油气分公司石油工程技术研究院四川德阳618000 中石化西南油气分公司采气二厂四川南充637000 中石化西南石油工程公司井下作业分公司四川德阳618000

须家河致密砂岩气藏120 MPa超高压、长时间大排量加砂压裂作业对管柱冲蚀影响,导致完井管柱出现变形、断裂、球座磨损、分段球不到位等问题。基于冲蚀磨损理论,选择出分段管柱中四处冲蚀严重部位,利用Ansys软件进行建模,采用动静态结合... 详细信息

须家河致密砂岩气藏120 MPa超高压、长时间大排量加砂压裂作业对管柱冲蚀影响,导致完井管柱出现变形、断裂、球座磨损、分段球不到位等问题。基于冲蚀磨损理论,选择出分段管柱中四处冲蚀严重部位,利用Ansys软件进行建模,采用动静态结合方法,计算得到了大规模加砂压裂施工管柱变径处的冲蚀程度定量值,明确了油管短节与滑套球座为冲蚀严重位置,有针对性地对冲蚀最严重位置进行了结构优化及材质优选。油管变扣短节优选Q125钢级管材可兼顾强度及经济性;改进滑套上接头变径处台阶倒角控制在30°以内,滑套球座顶部优化设计为弧形结构,球座采用硬质合金材质,优化改进后的滑套冲蚀程度比原结构降低66.5%,经川东北须家河组YL15、YL171、YL6等多口井成功应用,优化改进的压裂管柱满足了超高压加砂压裂长时间施工需求。

关键词：超高压大排量冲蚀油管短节滑套球座加砂压裂模拟计算 Ansys有限元分析

Direct silylation reactions of inert C-H bonds via transition metal catalysis

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Science China Chemistry 2015年第8期58卷 1266-1279页

作者： yunhui yang Congyang Wang Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences

In the past thirty years,transition metal catalyzed silylation of inert C–H bonds has attracted intensive attention due to the importance and wide use of organosilicon *** this review,the silylation reactions of inert C–H bonds catalyzed by transition metal complexes of Ir,Rh,Ru,Pt,Pd,Ni,and Sc,and the strategies utilized to access the site-selective C–H silylation products have been ***,the mechanisms of C–H silylation reactions have been discussed briefly.

关键词：过渡金属催化硅烷基化反应 C-H键惰性过渡金属配合物硅烷化反应有机硅化合物 Ru

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Forging Three Single Bonds on One Carbon via Metal Carbynes or Carbyne Equivalents

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Chinese Journal of Chemistry 2021年第12期39卷 3481-3484页

作者： yunhui yang Congyang Wang Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Metal carbyne(M≡C)complexes have been discovered for nearly half a century,however,they gained far less study in comparison with metal-carbon single bond(M—C)and metal carbene(M=C)species in synthetic *** to three sigma bonds are possibly forged on a single carbon through metal carbynes or carbyne equivalents,which holds great potentials in organic synthesis but also requires high efficiency of bond formation and precise control of reactivity and *** this line,two systems based on stoi-chiometric transformations of manganese carbynes and ruthenium/rhodium-catalyzed reactions of diazo hypervalent iodine reagents,carbyne equivalents,have emerged recently,which will be highlighted *** potentials and challenges in this intriguing area are also briefly discussed.

关键词： Transition metals Carbyne ligands Manganese Three sigma bonds Stoichiometric/Catalytic reactions

A universal non-Hermitian platform for bound state in the continuum enhanced wireless power transfer

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Frontiers of physics 2024年第4期19卷 37-46页

作者： Haiyan Zhang Zhiwei Guo yunhui Li Yaping yang Yuguang Chen Hong Chen School of Physics Science and Engineering Tongji UniversityShanghai 200092China Department of Electrical Engineering Tongji UniversityShanghai 201804China

Non-Hermitian systems with parity–time(PT)-symmetry have been extensively studied and rapidly developed in resonance wireless power transfer(WPT).The WPT system that satisfies PT-symmetry always has real eigenvalues,which promote efficient energy ***,meeting the condition of PT-symmetry is one of the most puzzling *** power transfer under different transmission conditions is also a great *** state in the continuum(BIC)supporting extreme quality-factor mode provides an opportunity for efficient ***,we propose theoretically and demonstrate experimentally that BIC widely exists in resonance-coupled systems without PT-symmetry,and it can even realize more stable and efficient power transfer than PT-symmetric ***,BIC for efficient WPT is universal and suitable in standard second-order and even high-order WPT *** results not only extend non-Hermitian physics beyond PT-symmetry,but also bridge the gap between BIC and practical application engineering,such as highperformance WPT,wireless sensing and communications.

关键词： non-Hermitian physics parity-time asymmetry bound state in the continuum wireless power transfer

Rhenium-Catalyzed Decarboxylative Tri-/Difluoromethylation of Styrenes with Fluorinated Carboxylic Acid-Derived Hypervalent Iodine Reagents

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Chinese Journal of Chemistry 2019年第12期37卷 1229-1233页

作者： Yin Wang yunhui yang Congyang Wang Radiochemistry Laboratory School of Nuclear Science and TechnologyLanzhou UniversityLanzhouGansu 730000China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Physical Science Laboratory Huairou National Comprehensive Science CenterBeijing 101400China

Summary of main observation and conclusion Herein,unprecedented rhenium-catalyzed decarboxylative oxytri-/difluoromethylation and Heck-type trifluoromethylation of styrenes have been developed by using hypervalent iodine(Ⅲ)reagents derived from cheap,stable,and easy-handling fluorinated carboxylic *** studies revealed a radical decarboxylative trifluoromethylation pathway occurring in these reactions.

关键词： valent iodine styrene

Level pinning of anti-PT-symmetric circuits for efficient wireless power transfer

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National Science Review 2024年第1期11卷 215-224页

作者： Zhiwei Guo Fengqing yang Haiyan Zhang Xian Wu Qiong Wu Kejia Zhu Jun Jiang Haitao Jiang Yaping yang yunhui Li Hong Chen MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Sciences and Engineering Tongji University Department of Electrical Engineering Tongji University School of Automotive Studies Tongji University

Wireless power transfer(WPT) technology based on magnetic resonance(a basic physical phenomenon)can directly transfer energy from the source to the load without wires and other physical contacts, and has been successfully applied to implantable medical devices, electric vehicles, robotic arms and other ***, due to the frequency splitting of near-field coupling, the resonant WPT system has some unique limitations, such as poor transmission stability and low efficiency. Here, we propose anti-resonance with level pinning for high-performance WPT. By introducing the anti-resonance mode into the basic WPT platform, we uncover the competition between dissipative coupling and coherent coupling to achieve novel level pinning, and construct an effective anti-parity-time(anti-PT)-symmetric non-Hermitian system that is superior to previous PT-symmetric WPT schemes. On the one hand, the eigenvalue of the anti-PT-symmetric system at resonance frequency is always pure real in both strong and weak coupling regions, and can be used to overcome the transmission efficiency decrease caused by weak coupling, as brought about by, for example, a large size ratio of the transmitter to receiver, or a long transmission *** the other hand, due to the level pinning effect of the two kinds of coupling mechanisms, the working frequency of the system is guaranteed to be locked, so frequency tracking is not required when the position and size of the receiver change. Even if the system deviates from the matching condition, an efficient WPT can be realized, thereby demonstrating the robustness of the level pinning. The experimental results show that when the size ratio of the transmitter coil to the receiver coil is 4.29(which is in the weak coupling region), the transfer efficiency of the anti-PT-symmetric system is nearly 4.3(3.2) times higher than that of the PT-symmetric system when the matching conditions are satisfied(deviated). With the miniaturization and integration of d

关键词： non-Hermitian system wireless power transfer anti-PT-symmetric circuits synthetic dimension metamaterials