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Superconducting ternary hydrides: progress and challenges

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National Science Review 2024年第7期11卷 47-61页

作者： wendi zhao Xiaoli Huang Zihan Zhang Su Chen Mingyang Du Defang Duan Tian Cui Institute of High Pressure Physics School of Physical Science and Technology Ningbo University State Key Laboratory of Superhard Materials College of Physics Jilin University

Since the discovery of the high-temperature superconductors H3S and LaH10under high pressure,compressed hydrides have received extensive attention as promising candidates for room-temperature superconductors. As a result of current high-pressure theoretical and experimental studies, it is now known that almost all the binary hydrides with a high superconducting transition temperature（Tc） require extremely high pressure to remain stable, hindering any practical application. In order to further lower the stable pressure and improve superconductivity, researchers have started exploring ternary hydrides and had many achievements in recent years. Here, we discuss recent progress in ternary hydrides, aiming to deepen the understanding of the key factors regulating the structural stability and superconductivity of ternary hydrides, such as structural motifs, bonding features, electronic structures, electron–phonon coupling, ***, the current issues and challenges of superconducting ternary hydrides are presented, together with the prospects and opportunities for future research.

关键词： high pressure ternary hydrides conventional superconductivity electron–phonon coupling

High temperature superconductor Na_(2)B_(2)H stabilized by hydrogen intercalation under ambient pressure

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Science China(Physics,Mechanics & Astronomy) 2024年第11期67卷 141-148页

作者： wendi zhao Defang Duan Zhengtao Liu Zihao Huo Shumin Guo Decheng An Maosheng Miao Tian Cui State Key Laboratory of Superhard Materials Key Laboratory of Material Simulation Methods&Software of Ministry of EducationCollege of PhysicsJilin UniversityChangchun 130012China Department of Chemistry and Biochemistry California State UniversityNorthridgeCalifornia 91330USA Department of Earth Science University of CaliforniaSanta BarbaraCalifornia 93106USA Institute of High Pressure Physics School of Physical Science and TechnologyNingbo UniversityNingbo 315211China

Hydrogenated metal borides have attracted much attention due to their potential high-temperature ***,we propose a new strategy for hydrogen intercalation tuning the stability and superconductivity of the boron honeycomb sublattice,and predict an unprecedented layered compound Na_(2)B_(2)H,which hosts excellent ***,the superconducting transition temperature(Tc)of Na_(2)B_(2)H reaches 42 K at ambient *** Tcvalue can be further increase to 63 K under 5%biaxial tensile *** excellent superconductivity originates from the strong electron-phonon coupling between theσ-bonding bands near the Fermi level and the B-B stretching optical E *** interstitial electron localization and crystal orbitals of the H-intercalated Na ion layer well match the boron honeycomb lattice and act as a chemical template to stabilize the B ***,the introduction of hydrogen tuned the Fermi level,and the coupling vibration of Na and H ions effectively enhanced the dynamic stability of the ***_(2)B_(2)H represents a new family of layered high-temperature superconductors,and the strategy of stabilizing the honeycomb boron sublattice via chemical template hosts great potential for application to more layered compounds.

关键词： superconductivity hydrogenation metal borides electron-phonon coupling

Wing load investigation of the plunge-diving locomotion of a gannet Morus inspired submersible aircraft

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Science China(Technological Sciences) 2014年第2期57卷 390-402页

作者： LIANG JianHong YAO GuoCai WANG TianMiao YANG XingBang zhao wendi SONG Gang ZHANG YuCheng Robotic Institute School of Mechanical Engineering and Automation Beihang University

In this paper,we studied the wing root pivot joint’s radial load of a submersible airplane which imitates the locomotion of gannet’s Morus plunge-diving,by implementing a test device name *** housing of the device was designed by mimicking the morphology of a living gannet,and the folding wings were realized by the mechanism of variable swept back ***,the radial loads of the wing root were obtained under the conditions of different dropping heights,different sweptback angles and different water-entry inclination angles(i.e.,the angle between the longitudinal body axis and the water surface),and the relationships between the peak radial load and the above three parameters were analyzed and discussed *** the studied areas,the minimum peak radial load of the pivot joint is 50.93 N,while the maximum reaches up to1135.00 *** largest peak load would be generated for the situation of vertical water entry and zero wing sweptback *** it is of great significance to choose the three parameters properly to reduce the pivot joint’s radial load,i.e.,larger wing sweptback angle,smaller dropping height and water-entry inclination *** is also concluded that the peak radial load on the wing root is closely linear with the water-entry dropping height and the wing sweptback angle with a significant ***,the relationship between the wing load and the dropping height,water-entry inclination angle or wing sweptback angle,could be used to calculate the wing load about plunge-diving of a submersible aircraft,and the conclusions reveal the wing load characteristic of the gannet’s plunge process for the biologists.

关键词： submersible aircraft mimic gannet water entry plunge diving sweptback wing load investigation

基于层级和全局特征结合的蛋白质序列EC编号预测

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遗传 2024年第8期46卷 661-670页

作者：杨帆韩巧玲赵文迪赵玥北京林业大学工学院北京100083 林业装备与自动化国家林业局重点实验室北京100083 城乡生态环境北京实验室北京100083 北京林业大学智慧林业研究中心北京100083

酶功能的识别对理解生命活动的机制、推进生命科学的发展有重要作用。然而现有的酶EC编号预测方法,并未充分利用蛋白质序列信息,在识别精度上仍有所不足。针对上述问题,本研究提出一种基于层级特征和全局特征的EC编号预测网络(EC number... 详细信息

酶功能的识别对理解生命活动的机制、推进生命科学的发展有重要作用。然而现有的酶EC编号预测方法,并未充分利用蛋白质序列信息,在识别精度上仍有所不足。针对上述问题,本研究提出一种基于层级特征和全局特征的EC编号预测网络(EC number prediction network using hierarchical features and global features,ECPN-HFGF)。该方法首先通过残差网络提取蛋白质序列通用特征,并通过层级特征提取模块和全局特征提取模块进一步提取蛋白质序列的层级特征和全局特征,之后结合两种特征信息的预测结果,采用多任务学习框架,实现酶EC编号的精确预测。计算实验结果表明,ECPN-HFGF方法在蛋白质序列EC编号预测任务上性能最佳,宏观F1值和微观F1值分别达到95.5%和99.0%。ECPN-HFGF方法能有效结合蛋白质序列的层级特征和全局特征,快速准确预测蛋白质序列EC编号,比当前常用方法预测精确度更高,能够为酶学研究和酶工程应用的发展提供一种高效的思路和方法。

关键词：酶功能预测蛋白质序列深度学习层级多标签分类全局特征

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高压下氢基高温超导体研究的新进展

氧化石墨烯在钛植入物表面改性应用中的研究进展

高压物理学报 2021年第2期35卷 1-7页

作者：赵文迪段德芳崔田宁波大学物理科学与技术学院浙江宁波 315211 吉林大学物理学院吉林长春 130012 宁波大学物理科学与技术学院浙江宁波 315211 吉林大学物理学院吉林长春 130012

富氢材料被认为是室温超导体的最佳候选体系,是物理学、材料科学等多学科的热点研究领域之一.理论和实验研究发现的新型共价氢化物H3S和笼状氢化物LaH10的超导转变温度(Tc)均超过200 K,进一步推动了对富氢化合物超导电性的探索.最近,通... 详细信息

富氢材料被认为是室温超导体的最佳候选体系,是物理学、材料科学等多学科的热点研究领域之一.理论和实验研究发现的新型共价氢化物H3S和笼状氢化物LaH10的超导转变温度(Tc)均超过200 K,进一步推动了对富氢化合物超导电性的探索.最近,通过高压实验合成的碳质硫氢化物在288 K的室温下实现了零电阻,让人们看到了室温超导的曙光.本文结合课题组在此领域的主要成果,介绍了3类典型富氢化合物的结构及超导特性,包括近期首次在层状氢化物中发现的具有类五角石墨烯结构的富氢超导体HfH10,其超导转变温度高达213～234 K.

关键词：高压富氢材料层状氢化物超导电性

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口腔医学研究 2020年第11期36卷 1000-1003页

作者：赵文迪刘晓秋吉林大学口腔医院口腔修复科吉林长春130021

金属钛以其优良的理化性质和良好的生物相容性被广泛应用于牙科种植和骨科植入领域,但钛植入材料仍可能发生移植整合失败或者发生以植入物为中心的感染。为了优化种植体性能,对钛表面进行物理、化学、生物改性已经成为研究热点。氧化石... 详细信息

金属钛以其优良的理化性质和良好的生物相容性被广泛应用于牙科种植和骨科植入领域,但钛植入材料仍可能发生移植整合失败或者发生以植入物为中心的感染。为了优化种植体性能,对钛表面进行物理、化学、生物改性已经成为研究热点。氧化石墨烯因具有良好的机械性能、骨传导性、骨诱导性、生物相容性、抗菌性、易功能化等特点,目前越来越多地被应用于复合生物材料的研发。本文将近年来氧化石墨烯在金属钛表面改性研究中的应用情况进行综述。

关键词：氧化石墨烯钛表面改性

LiDAR-Visual SLAM with Integrated Semantic and Texture Information for Enhanced Ecological Monitoring Vehicle Localization

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Computers, Materials & Continua 2025年第1期82卷 1401-1416页

作者： Yiqing Lu Liutao zhao Qiankun zhao Foreign Environmental Cooperation Center Ministry of Ecology and Environment of PRCBeijing100035China Beijing Computing Center Co. Ltd.Beijing Academy of Science and TechnologyBeijing100083China Beijing Guyu Interactive Artificial Intelligence Application Co. Ltd.Beijing100024China

Ecological monitoring vehicles are equipped with a range of sensors and monitoring devices designed to gather data on ecological and environmental *** vehicles are crucial in various fields,including environmental science research,ecological and environmental monitoring projects,disaster response,and emergency management.A key method employed in these vehicles for achieving high-precision positioning is LiDAR(lightlaser detection and ranging)-Visual Simultaneous Localization and Mapping(SLAM).However,maintaining highprecision localization in complex scenarios,such as degraded environments or when dynamic objects are present,remains a significant *** address this issue,we integrate both semantic and texture information from LiDAR and cameras to enhance the robustness and efficiency of data ***,semantic information simplifies the modeling of scene elements,reducing the reliance on dense point clouds,which can be less ***,visual texture information complements LiDAR-Visual localization by providing additional contextual *** incorporating semantic and texture details frompaired images and point clouds,we significantly improve the quality of data association,thereby increasing the success rate of *** approach not only enhances the operational capabilities of ecological monitoring vehicles in complex environments but also contributes to improving the overall efficiency and effectiveness of ecological monitoring and environmental protection efforts.

关键词： LiDAR-Visual simultaneous localization and mapping integrated semantic texture information

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复杂外形水下潜伏平台流体动力数值模拟

火力与指挥控制 2022年第8期47卷 38-43页

作者：王鹰袁绪龙赵文迪梁丹丹西北工业大学航海学院西安710072 青岛西海岸新区海洋发展局山东青岛266000

潜伏于水中的导弹武器一般采用多联装发射-储运一体装置,与传统主动攻击型水雷相比具有更复杂的外形。为分析锚系型水下潜伏平台在海流作用下的扰动运动,需计算其全部流体动力系数。基于CFD方法,建立一套复杂外形水下潜伏平台的流体动... 详细信息

潜伏于水中的导弹武器一般采用多联装发射-储运一体装置,与传统主动攻击型水雷相比具有更复杂的外形。为分析锚系型水下潜伏平台在海流作用下的扰动运动,需计算其全部流体动力系数。基于CFD方法,建立一套复杂外形水下潜伏平台的流体动力计算方法,计算一种四联装水下潜伏平台的位置力、阻尼力和附加质量特性,可为水下潜伏平台扰动运动仿真提供全套流体动力参数。计算方法可供其他复杂外形水下航行器和结构物流体动力特性计算参考。

关键词：水下潜伏平台流体动力特性数值模拟运动仿真锚系

艾灸结合中药熏蒸干预对慢性腰肌劳损患者疼痛及腰背功能恢复的影响

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中国疗养医学 2020年第1期29卷 26-28页

作者：张龑赵文娣郑州市骨科医院颈肩腰腿疼二科郑州市骨科医院颈肩腰腿疼一科

目的探究艾灸结合中药熏蒸干预对慢性腰肌劳损患者疼痛及腰背功能恢复的影响.方法选取某院2016年7月至2018年5月诊治的慢性腰肌劳损患者90例,采用随机数表法分为两组,各45例.对照组给予功能康复锻炼干预,观察组在对照组基础上采用艾灸... 详细信息

目的探究艾灸结合中药熏蒸干预对慢性腰肌劳损患者疼痛及腰背功能恢复的影响.方法选取某院2016年7月至2018年5月诊治的慢性腰肌劳损患者90例,采用随机数表法分为两组,各45例.对照组给予功能康复锻炼干预,观察组在对照组基础上采用艾灸联合中药熏蒸,对比两组临床疗效、治疗前后疼痛评分及腰背功能恢复情况.结果观察组治疗总有效率91.11%,高于对照组的66.67%,差异有统计学意义(P<0.05);观察组治疗后视觉模拟评分法(VAS)评分低于对照组,背肌力高于对照组,腰肌耐力时间长于对照组,差异有统计学意义(P<0.05).结论艾灸结合中药熏蒸干预可有效改善慢性腰肌劳损患者的临床症状,降低其腰痛评分,利于促进腰背功能的恢复,改善预后.

关键词：慢性腰肌劳损艾灸中药熏蒸疼痛腰背功能