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Research progress on the development mechanism and exploratory protection of the scaling off on earthen sites in NW China

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Science China(Technological Sciences) 2023年第8期66卷 2183-2196页

作者： DU YuMin dong wenqiang CUI Kai CHEN WenWu YANG WeiLi Institute of Culture and Heritage Northwestern Polytechnical UniversityXi’an 710072China Western Center for Disaster Mitigation in Civil Engineering of Ministry of Education of China School of Civil EngineeringLanzhou University of TechnologyLanzhou 730050China Key Scientific Research Base of the State Administration of Cultural Heritage for the Conservation and Restoration of Murals and Material Science Research Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Mechanics on Disaster and Environment in Western China College of Civil Engineering and MechanicsLanzhou UniversityLanzhou 730000China School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China

The scaling off is among the most pervasive and severe deterioration *** scaling off developed on earthen sites in Northwest China has a special and complex binary structure composed of crusted and loose *** the synergistic functions of external environmental elements such as rainfall,temperature,and wind,and rammed earth properties,this deterioration has gradually created the crust on the site’s surface,and has then evolved into exfoliation and finally fallen off,leading to the reciprocating progressive destruction of earthen ***,determining the development mechanism of scaling off and implementing targeted protection measures for the scientific conservation of earthen sites has become *** this review study,the properties of the building material causing the binary structure and the coupling effects of water,temperature,salt,and wind on the development of scaling off were determined,and the quantitative evaluation system for this deterioration development was *** interpreting the reasons for the development of the scaling off,protective measures including chemical grouting,electro-osmosis grouting,and overlay applications were *** study also pointed out the research hotspots and shortage in the study process on the scaling *** hotspots generally focused on the development mechanism of binary structure,quantitative assessment of the degree of development,and related scientific consolidation *** shortcomings around the above directions include less attention to the development characteristics and mechanism of scaling off on earthen sites under special environment types,optimization and applicability of quantitative evaluation models,and the development and feasibility of reinforcement slurries and *** study can be beneficial in providing theoretical support for the scientific conservation and engineering practice of the scaling off on the earthen sites.

关键词： scaling off earthen sites binary structure development mechanism quantitative evaluation protection

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静力学辨识力矩补偿控制抑制机械臂振动研究

一重技术 2024年第3期 69-72,45页

作者：董文强杨旗周杨牛金辉沈阳理工大学机械工程学院辽宁沈阳110159

机械臂在完成定位抓取时,由于本身存在柔性引起振动影响机械臂的工作效率。因此,大多专家学者通过设计控制器进行开环前馈控制,但由于忽略机械臂关节端摩擦和电机端摩擦等非线性因素,控制器控制精度不足,抑制关节振动效果欠佳。对此提... 详细信息

机械臂在完成定位抓取时,由于本身存在柔性引起振动影响机械臂的工作效率。因此,大多专家学者通过设计控制器进行开环前馈控制,但由于忽略机械臂关节端摩擦和电机端摩擦等非线性因素,控制器控制精度不足,抑制关节振动效果欠佳。对此提出通过静力学辨识得到准确的摩擦力矩补偿量,设计精确的关节力矩补偿控制律。最后,通过MATLAB仿真验证方法的有效性。

关键词：静力学辨识力矩补偿控制输入整形器振动抑制

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基于STM32的车辆远程通信终端系统开发

汽车实用技术 2024年第13期49卷 18-22页

作者：董文强梁亚坤高建金程灿陕西工业职业技术学院航空工程学院陕西咸阳712000 长安大学信息工程学院陕西西安710064 陕西易村智能交通科技有限公司陕西咸阳712000 长安大学电子与控制工程学院陕西西安710064

为了解决低成本、高可靠的“两客一危”车辆智能管控问题,文章设计了一种基于STM32的远程通信终端系统。该系统采用STM32F105VCT6为主控芯片,结合全球定位系统(GPS)、4G通信与控制器局域网络(CAN)总线技术,实现了车辆状态信息在线感知... 详细信息

为了解决低成本、高可靠的“两客一危”车辆智能管控问题,文章设计了一种基于STM32的远程通信终端系统。该系统采用STM32F105VCT6为主控芯片,结合全球定位系统(GPS)、4G通信与控制器局域网络(CAN)总线技术,实现了车辆状态信息在线感知、指令交互等功能,可在车路云管控平台上进行动态监测与精细化管控。实验证明,该终端能够满足实际情况下车辆通讯和信息交互,实现了低成本、高可靠的“两客一危”精细化管控。

关键词：智能网联技术远程信息处理器 STM32

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2D Ca/Nb-based perovskite oxide with Ta doping as highly efficient H_(2)O_(2)synthesis catalyst

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Nano Research 2024年第6期17卷 4934-4942页

作者： Xingchen Yang Yang Gao Xiaohui Xu wenqiang Xu Denghui Wang Bin Luo dong Liu Tao Liang Bin Wang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Nanomaterials Centre School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnologythe University of QueenslandSt LuciaQLD 4072Australia State Key Laboratory of Organic–Inorganic Composites College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China State Key Lab of Silicon Materials Zhejiang UniversityHangzhou 310027China

Perovskite oxides(POs)are emerging as a class of highly efficient catalysts for reducing oxygen to H_(2)*** a rich variety of POs-based catalysts have been developed by tuning the complex composition,a highly efficient PO catalyst that is able to alter the reaction pathway from a 4e−process to a 2e−process for H_(2)O_(2)production has rarely been *** modified the structure and composition of a Ca-and Nb-based PO material by realizing a uniform two-dimensional(2D)morphology and varied Ta doping,resulting in the 2D Ca_(2)Nb_(3−x)Ta_(x)O_(10)−(x=0,0.5,1,and 1.5)monolayer *** obtained catalysts exhibit a dominant 2e−pathway and show exceptional H_(2)O_(2)production *** typical Ca_(2)Nb_(2.5)Ta_(0.5)O_(10)−nanoflakes showed an onset potential of 0.735 V *** hydrogen electrode(RHE),a remarkably high selectivity over 95%across a wide range of 0.3-0.7 V,an impressively high Faradaic efficiency of 94%,and a notable H_(2)O_(2)productivity of 1571 mmol·gcat^(−1)·h^(−1).These findings highlight the great potential of 2D perovskite oxide nanoflakes as advanced electrocatalysts for 2e−oxygen reduction reaction.

关键词： perovskite oxide H_(2)O_(2) two-electron oxygen reduction reaction catalyst Ca_(2)Nb_(3-x)Ta_(x)O_(10)-nanoflakes

Heat Shock Factor A1s are required for phytochrome-interacting factor 4-mediated thermomorphogenesis in Arabidopsis

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Journal of Integrative Plant Biology 2024年第1期66卷 20-35页

作者： Bingjie Li Shimeng Jiang Liang Gao Wenhui Wang Haozheng Luo Yining dong Zhihua Gao Shuzhi Zheng Xinye Liu wenqiang Tang Key Laboratory of Molecular and Cellular Biology of Ministry of Education Hebei Research Center of the Basic Discipline of Cell BiologyHebei Collaboration Innovation Center for Cell SignalingHebei Key Laboratory of Molecular and Cellular BiologyCollege of Life SciencesHebei Normal UniversityShijiazhuang 050024China School of Information Technology Hebei University of Economics and BusinessShijiazhuang 050061China

Thermomorphogenesis and the heat shock(HS)response are distinct thermal responses in plants that are regulated by PHYTOCHROME-INTERACTING FACTOR 4(PIF4)and HEAT SHOCK FACTOR A1s(HSFA1s),*** is known about whether these responses are interconnected and whether they are activated by similar *** analysis of transcriptome dynamics in response to warm temperature(28℃)treatment revealed that 30 min of exposure activated the expression of a subset of HSFA1 target genes in Arabidopsis ***,a loss-of-function HSFA1 quadruple mutant(hsfa1-cq)was insensitive to warm temperature-induced hypocotyl *** hsfa1-cq plants grown at 28℃,the protein and transcript levels of PIF4 were greatly reduced,and the circadian rhythm of many thermomorphogenesis-related genes(including PIF4)was ***,the nuclear localization of HSFA1s and the binding of HSFA1d to the PIF4 promoter increased following warm temperature exposure,whereas PIF4 overexpression in hsfa1-cq partially rescued the altered warm temperature-induced hypocotyl growth of the *** together,these results suggest that HSFA1s are required for PIF4 accumulation at a warm temperature,and they establish a central role for HSFA1s in regulating both thermomorphogenesis and HS responses in Arabidopsis.

关键词： HSFA1 PIF4 thermomorphogenesis

中华民族共同体视域下的北朝黄帝祖源记忆建构与认同

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西北民族大学学报（哲学社会科学版） 2022年第5期 59-65页

作者：董文强陕西师范大学历史文化学院陕西西安710119

北朝黄帝祖源记忆的建构,是中华民族共同体历史演进中多元民族互动与凝聚为一体的具体表现,是中华民族共同体意识发展阶段的历史见证。根据相关史籍,北朝黄帝祖源记忆经历了从个体行为到政治体主动认同,再到北魏官方法统层面的建构历程... 详细信息

北朝黄帝祖源记忆的建构,是中华民族共同体历史演进中多元民族互动与凝聚为一体的具体表现,是中华民族共同体意识发展阶段的历史见证。根据相关史籍,北朝黄帝祖源记忆经历了从个体行为到政治体主动认同,再到北魏官方法统层面的建构历程;从墓志中发现,这种记忆最初是北魏政治体的典范引领,后逐步发展成为整个北方胡汉共同体的普遍历史记忆,从而促进了四裔群体的融合与凝聚。经过长时段的胡汉“一体化”整合,北朝晚期黄帝祖源记忆已超越单纯的“攀附”内涵,成为了“天下一家”四裔各族共享的集体记忆,这种记忆更深层次地体现了中华民族共同体意识潜在的情感价值与文化凝聚力。

关键词：中华民族共同体北朝黄帝祖源记忆华夏认同民族融合

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青铜文物的腐蚀特征及防护策略研究

材料保护 2024年第6期57卷 96-101,112页

作者：和天逸王海宁梁皓哲宋俊飞邹鸿立王恩泽钱佑宇董文强夏琦兴西北工业大学文化遗产研究院陕西西安710000 西北工业大学生态环境学院陕西西安710000 西北工业大学伦敦玛丽女王大学工程学院陕西西安710000 考古探测与文物保护技术教育部重点实验室(西北工业大学) 陕西西安710072

青铜文物保护是金属类文物保护工作中的难点。介绍了青铜文物在不同影响因素作用下的锈层产生机制和典型青铜病害,重点以粉状锈为例概述了青铜文物有害锈防治策略的研究进展。在此基础上,提出了未来青铜文物保护的发展方向。

关键词：青铜文物腐蚀机制无害锈有害锈防护策略

MINERAL ASSEMBLAGES AND THEIR DISTRIBUTION PATTERNS IN THE SEDIMENTS OF THE GULF OF BOHAI SEA

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Chinese Journal of Oceanology and Limnology 1982年第1期1卷 82-103页

作者： Chen Lirong, Luan Zuofeng, Zhen Tiemin, Xu wenqiang and dong Tailu (Institute of Oceanology, Academia Sinica) Institute of Oceanology Academia Sinica Qingdao China

The study of the mineral compositions has important bearings in the understanding of the process of sedimentation in the marine environment, the components, distribution patterns and sources of the sediments, compositions of the parent rocks, and the various ways of transportation of the constituent minerals. Therefore the study of the mineral assemblages and their regime of transportation has lately become one of important aspects in marine sedimentology. The mineral components of the Bohai Bay have been described preliminarily by Qin

关键词： Bay Bank

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丝路贞珉:新出隋代《刘义碑》研读

敦煌研究 2023年第1期 101-110页

作者：董文强周晓薇陕西师范大学历史文化学院陕西西安710119

2021年在甘肃省榆中县新出土的隋开皇十二年《刘义碑》,有着重要的文献价值与历史意义。一是裨补了存世珍稀的隋代碑版,适可借以考察陇右地区在隋代连接西域特殊时空下的“丝路”历史人文情境;二是通过对史料与史学的分析,辨正其家族渊... 详细信息

2021年在甘肃省榆中县新出土的隋开皇十二年《刘义碑》,有着重要的文献价值与历史意义。一是裨补了存世珍稀的隋代碑版,适可借以考察陇右地区在隋代连接西域特殊时空下的“丝路”历史人文情境;二是通过对史料与史学的分析,辨正其家族渊源,研讨刘义及其子嗣在周隋的政治军事活动,揭示中央在西北地区与胡族争夺军事要地的纷繁战事;三是从碑刻形制与书法的艺术史层面考量,足资见证隋代京师文化与制度对边地的播迁与影响。

关键词：隋代《刘义碑》吐谷浑陇西苑川京师文化