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硼、硼氮及硼磷纳米材料研究进展

化工新型材料 2024年第S1期52卷 109-116页

作者：吕超张超王东琪安徽理工大学材料科学与工程学院淮南232001 大连理工大学化学学院大连116024

硼纳米材料有硬度和熔点高、密度低的特点,在高温器件、轻质增强填料等领域应用广泛。种类繁多的硼纳米材料可以成为与其他现有纳米材料、分子、原子或离子结合的基底材料,以设计和创造具有特定功能和特性的新材料。首先介绍了硼纳米材... 详细信息

硼纳米材料有硬度和熔点高、密度低的特点,在高温器件、轻质增强填料等领域应用广泛。种类繁多的硼纳米材料可以成为与其他现有纳米材料、分子、原子或离子结合的基底材料,以设计和创造具有特定功能和特性的新材料。首先介绍了硼纳米材料的研究进展,包括硼团簇、硼纳米线、硼纳米管、硼纳米带和硼纳米片;其次,以硼氮和硼磷材料为例,综述了两种二元含硼纳米材料的研究进展;最后,展望了硼、硼氮及硼磷纳米材料的未来研究方向,为该领域的研究提供启发。

关键词：硼纳米材料氮化硼磷化硼 0维硼材料量子点

基于高考评价体系的“糖尿病”原创试题命制例析

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生物学教学 2024年第1期49卷 64-67页

作者：李琳王东启王永玉河南省沈丘县第二高级中学周口466300

本文以糖尿病致病的分子机理、相关基因表达抑制和适度运动进行糖尿病的预防和治疗为情境,结合“基因的表达、物质的跨膜运输、激素调节、免疫调节”等教学内容进行试题命制,以设问考查学生必备知识与技能,以学生作答评价学生的综合素养... 详细信息

本文以糖尿病致病的分子机理、相关基因表达抑制和适度运动进行糖尿病的预防和治疗为情境,结合“基因的表达、物质的跨膜运输、激素调节、免疫调节”等教学内容进行试题命制,以设问考查学生必备知识与技能,以学生作答评价学生的综合素养,为今后教学有效提升学生的综合素养提供参考。

关键词：糖尿病情境创设试题命制

低共熔体掺杂对PEDOT:PSS膜的结构与光学特性的影响

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包装工程 2024年第13期45卷 119-127页

作者：王东琦曾海兰王徽张维莉湛江卷烟包装材料印刷有限公司广东湛江524057 湖南工业大学包装与材料工程学院湖南株洲412007

目的在水溶液体系中,合成一种性能优良的环境友好型高分子材料。方法采用低共熔体(DES)与聚苯磺酸钠(PSS)的水溶液为溶剂,3,4-乙烯二氧噻吩(EDOT)为单体,在三电极系统中电化学聚合得到3种DES掺杂的PEDOT:PSS(PEDOT:PSS/DES)。采用傅里... 详细信息

目的在水溶液体系中,合成一种性能优良的环境友好型高分子材料。方法采用低共熔体(DES)与聚苯磺酸钠(PSS)的水溶液为溶剂,3,4-乙烯二氧噻吩(EDOT)为单体,在三电极系统中电化学聚合得到3种DES掺杂的PEDOT:PSS(PEDOT:PSS/DES)。采用傅里叶红外光谱仪与X射线光电子谱仪对薄膜的分子结构特征进行分析,同时利用紫外-可见光谱UV-Vis对薄膜的光学特性进行研究。结果研究表明,DES掺杂显著促进了薄膜中π-π*跃迁峰的蓝移,提升了薄膜分子中的共轭度,最大光学对比度由0.27提升到0.30以上。结论DES掺杂可提升薄膜的分子结构共轭度和光电转化能力,为环境友好型高分子材料和新型光电器件的设计和应用提供了有力支持。

关键词：电化学聚合聚3,4-乙烯二氧噻吩低共熔体掺杂

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Design and Analysis of a 2-DOF Actuator with Variable Stiffness Based on Leaf Springs

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Journal of Bionic Engineering 2022年第5期19卷 1392-1404页

作者： ShangKui Yang Peng Chen dongqi wang Yi Yu Yuwang Liu State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110000China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110000China Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education School of Mechanical Engineering Tianjin UniversityTianjin 300192China University of Chinese Academy of Sciences Beijing 100049China

Variable Stiffness Actuator(VSA)is the core mechanism to achieve physical human–robot interaction,which is an inevitable development trend in *** existing variable stiffness actuators are basically single degree-of-freedom(DOF)rotating joints,which are achieving multi-DOF motion by cascades and resulting in complex robot body *** this paper,an integrated 2-DOF actuator with variable stiffness is proposed,which could be used for bionic wrist joints or shoulder *** 2-DOF motion is coupling in one universal joint,which is different from the way of single DOF actuators *** on the 2-DOF orthogonal motion generated by the spherical wrist parallel mechanism,the stiffness could be adjusted by varying the effective length of the springs,which is uniformly distributed in the variable stiffness *** variable stiffness principle,the model design,and theoretical analysis of the VSA are discussed in this *** independence of adjusting the equilibrium position and stiffness of the actuator is validated by *** results show that the measured actuator characteristics are sufficiently matched the theoretical *** the future,VSA could be used in biped robot or robotic arm,ensuring the safety of human–robot interaction.

关键词： Physical human-robot interaction 2-DOF Bionic wrist joints Variable stiffness actuator Leaf spring

Community Discovery Algorithm Based on Multi-Relationship Embedding

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Computer Systems Science & Engineering 2023年第9期46卷 2809-2820页

作者： Dongming Chen Mingshuo Nie Jie wang dongqi wang Software College Northeastern UniversityShenyang110169China

Complex systems in the real world often can be modeled as network structures,and community discovery algorithms for complex networks enable researchers to understand the internal structure and implicit information of *** community discovery algorithms are usually designed for single-layer networks or single-interaction relationships and do not consider the attribute information of ***,many real-world networks consist of multiple types of nodes and edges,and there may be rich semantic information on nodes and *** methods for single-layer networks cannot effectively tackle multi-layer information,multi-relationship information,and attribute *** paper proposes a community discovery algorithm based on multi-relationship *** proposed algorithm first models the nodes in the network to obtain the embedding matrix for each node relationship type and generates the node embedding matrix for each specific relationship type in the network by node *** node embedding matrix is provided as input for aggregating the node embedding matrix of each specific relationship type using a Graph Convolutional Network(GCN)to obtain the final node embedding *** strategy allows capturing of rich structural and attributes information in multi-relational *** were conducted on different datasets with baselines,and the results show that the proposed algorithm obtains significant performance improvement in community discovery,node clustering,and similarity search tasks,and compared to the baseline with the best performance,the proposed algorithm achieves an average improvement of 3.1%on Macro-F1 and 4.7%on Micro-F1,which proves the effectiveness of the proposed algorithm.

关键词： Network representation learning multi-relationship node encoder attribute information

Multi-Agent Deep Reinforcement Learning for Efficient Computation Offloading in Mobile Edge Computing

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Computers, Materials & Continua 2023年第9期76卷 3585-3603页

作者： Tianzhe Jiao Xiaoyue Feng Chaopeng Guo dongqi wang Jie Song Department of Software Engineering Software CollegeNortheastern UniversityShenyang110819China

Mobile-edge computing(MEC)is a promising technology for the fifth-generation(5G)and sixth-generation(6G)architectures,which provides resourceful computing capabilities for Internet of Things(IoT)devices,such as virtual reality,mobile devices,and smart *** general,these IoT applications always bring higher energy consumption than traditional applications,which are usually *** provide persistent energy,many references have studied the offloading problem to save energy ***,the dynamic environment dramatically increases the optimization difficulty of the offloading *** this paper,we aim to minimize the energy consumption of the entireMECsystemunder the latency constraint by fully considering the dynamic *** games,we propose amulti-agent deep reinforcement learning approach based on the bi-level actorcritic learning structure to jointly optimize the offloading decision and resource allocation,which can solve the combinatorial optimization problem using an asymmetric method and compute the Stackelberg equilibrium as a better convergence point than Nash equilibrium in terms of Pareto *** method can better adapt to a dynamic environment during the data transmission than the single-agent strategy and can effectively tackle the coordination problem in the multi-agent *** simulation results show that the proposed method could decrease the total computational overhead by 17.8%compared to the actor-critic-based method and reduce the total computational overhead by 31.3%,36.5%,and 44.7%compared with randomoffloading,all local execution,and all offloading execution,respectively.

关键词： Computation offloading multi-agent deep reinforcement learning mobile-edge computing latency energy efficiency

Design and experiment of a novel pneumatic soft arm based on a deployable origami exoskeleton

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Frontiers of Mechanical Engineering 2023年第4期18卷 119-130页

作者： Yuwang LIU Wenping SHI Peng CHEN Yi YU Dongyang ZHANG dongqi wang State Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169China School of Mechanical Engineering Northeastern UniversityShenyang 110000China University of Chinese Academy of Sciences Beijing 100049China

Soft arms have shown great application potential because of their flexibility and compliance in unstructured ***,soft arms made from soft materials exhibit limited cargo-loading capacity,which restricts their ability to manipulate *** this research,a novel soft arm was developed by coupling a rigid origami exoskeleton with soft *** joint module of the soft arm was composed of a deployable origami exoskeleton and three soft *** motion and load performance of the soft arm of the eight-joint module was *** developed soft arm withstood at least 5 kg of load during extension,contraction,and bending motions;exhibited bistable characteristics in both fully contracted and fully extended states;and achieved a bending angle of more than 240°and a contraction ratio of more than 300%.In addition,the high extension,contraction,bending,and torsional stiffnesses of the soft arm were experimentally demonstrated.A kinematic-based trajectory planning of the soft arm was performed to evaluate its error in repetitive *** work will provide new design ideas and methods for flexible manipulation applications of soft arms.

关键词： pneumatic soft arm soft airbag deployable origami exoskeleton bistable characteristics cargoloading capacity

Influence of anions on the adsorption of uranyl on hydroxylated α-SiO_2(001):A first-principles study

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Green Energy & Environment 2017年第1期2卷 30-41页

作者： Hui wang Zhifang Chai dongqi wang CAS Key Laboratory of Nuclear Radiation and Nuclear Energy Techniques and Multidisciplinary Initiative Center Institute of High Energy Physics Chinese Academy of Sciences CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology School of Radiation Medicine and Interdisciplinary Sciences (RAD-X) Soochow University

The adsorption of uranyl on hydroxylated α-SiO_2(001) in the presence of a series of anionic ligands, i.e. OH^-, CO_3^(2-), NO_3^-, H_2PO_4^-, HPO_4^(2-),CH_3COO^-(Ac^-), C_6H_5COO^-(PhCO_2^-), C_6H_5O^-(PhO^-), was studied by the periodic density functional theory(DFT) implemented in the Vienna ab initio simulation package(VASP). For the ligands other than OH^-and PhO^-, only the bidentate coordination modes to the uranyl were considered. The excess charge effect of a charged system was first evaluated by constructing models with net charge as is or neutralized by creating defect at the bottom of silica, and the results show that a neutralized model, even with defects, is more realistic than the charged *** uranyl species prefer to bind with the deprotonated site(—O^-) rather than the protonated one(—O_H), which suggests that the increase of pH,which leads to the deprotonation of the surface, may enhance the uranyl adsorption. On the other hand, the anionic ligands, which are formed at higher pH, have negative effects. The weaker acidic ligands, such as H_2CO_3, H_3PO_4 and H_2O, whose speciation in solutions is sensitive to the fluctuation of pH, have more complex effect on the uranyl adsorption than strong acids or bases. Humic substances may coordinate with uranyl through carboxyl and phenolic groups, with the carboxyl group bound stronger. The ternary complexes with one bidentate(or monodentate)anion and one(or two) H20 as ligands, which leads to the uranyl penta-coordinated in its equatorial plane, are more favorable than other configurations when bound to the same anionic ligand. Both the charged nature and the coordination behavior of an anionic ligand are relevant to its ability to influence the adsorption of uranyl on the mineral surface. In addition, the uranyl species adsorbed at the surface functionalized by anionic ligands were also addressed, and the functionalized surfaces have weaker interaction with hydrated uranyl dication.

关键词： Density functional theory Adsorption α-SiO2(001) Uranyl Anionic ligands

Discussion on the Reform of Secure Coding

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计算机教育 2022年第12期 43-48页

作者： Yi Ma Dongming Chen dongqi wang software college Northeastern UniversityShenyang110006China

Secure Coding is an indispensable part of the undergraduate training program for Information Security *** a basic course for undergraduates to carry out project engineering,its importance is *** the actual teaching activities,the program design courses have to be solved in terms of content update,practical ability improvement and scientific research project,so the curriculum reform is *** paper analyses the main problems existing in the Secure Coding course,explores the solution,proposes teaching methods,and gives the evaluation *** practice shows that the reform exploration can obtain good teaching results.

关键词： Secure coding Case-based teaching method Modern teaching methods Evaluation methods