检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Yang, Wenrui Huang, Yuewen Tang, Zhiyi Xiong, Xiaolong Li, Chengwei Zhong, xuwen liu, Liai Zhou, Hai Zhang, Xun School of Civil and Architectural Engineering East China University of Technology Nanchang330012 China

The development of the modernization process has resulted in the consumption of natural resources and the accumulation of construction waste, and the environmental bearing capacity faces severe challenges to a certain extent. The recovery and reuse of concrete is one of the effective ways to alleviate the environmental load. However, pouring concrete with recycled aggregate inevitably reduces the strength of the building. More seriously, the coastal tidal environment can have a coupled effect of salt erosion and dry-wet cycles on concrete components, thereby shortening the service life of concrete. The incorporation of fibers can improve the performance of the Recycled Aggregate Concrete (RAC) under special conditions. This article analyzes the changes in the performance of concrete specimens under different Basalt Fiber (BF) volume ratios (0%, 0.5%, 1.0%, and 1.5%) and composite salt simulated accelerated erosion cycles (0 d, 30 d, 60, and 90 d). The comparison results of RAC in apparent corrosion morphology, internal microstructure, and impermeability test show that BF can inhibit the expansion of microcracks and micropores in the test block and improve the overall compactness of the internal structure of RAC. When the fiber content of BF is 1.0%, the toughening effect of concrete is optimal, and impermeability and corrosion resistance of RAC are also significantly improved. Furthermore, the corrosion damage mechanism of Basalt Fiber Recycled Aggregate Concrete (BFRAC) under the combined effects of composite salts and dry-wet cycles was comprehensively summarized and substantiated through chemical reaction principles. The paper proposed a salt solution erosion model of BFRAC, which elucidates the mechanism of fiber crack resistance and explains the accelerated corrosion mechanism of salt solution from the perspective of "ion crack channels." The proposed model provides theoretical support for the salt erosion damage of fiber-reinforced concrete. © 2023, The Author

关键词： Erosion

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Observation of Dirac nodal line states in topological semimetal candidate PrSbTe

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Physical Review B 2024年第4期109卷 045113-045113页

作者： Dengpeng Yuan Dajian Huang Xin Ma Xu Chen Huifen Ren Yun Zhang Wei Feng Xiegang Zhu Bo Wang xuwen He Jian Wu Shiyong Tan Qunqing Hao Qiang Zhang Yi liu Qin liu Zhengtai liu Chao Cao Qiuyun Chen Xinchun Lai Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621907 China Center for Correlated Matter and School of Physics Zhejiang University Hangzhou 310058 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China

The interplay among topology, crystal symmetry, magnetic order, and strong electron correlation can give rise to a plethora of exotic physical phenomena. The ZrSiS family is known as typical topological Dirac semimetals, among them LnSbTe (Ln denotes lanthanide) compounds exhibit intriguing characteristics due to the presence of Ln 4f electrons, resulting in quantum states and unique properties. In this paper, the topological electronic structure of PrSbTe is systematically studied by angle-resolved photoemission spectroscopy (ARPES), combined with magnetic, specific heat measurements, and band structure calculations. The detailed three-dimensional electronic structure of PrSbTe has been obtained, and a diamond-shaped Fermi surface and multiple Dirac nodal lines have been observed, which are in remarkable agreement with theoretical calculations. Moreover, the 4f electrons in PrSbTe are rather localized, which can be revealed by on-resonant ARPES data and further confirmed by the rather small Sommerfeld coefficient of γ=2.6231mJ/molK2. Our results provide more detailed information about the LnSbTe family, which gives a deeper understanding of the interaction between Ln 4f electrons and the topological states.

关键词： Electronic structure Fermi surface Topological materials Dirac semimetal Node-line semimetals Angle-resolved photoemission spectroscopy Magnetic techniques Specific heat measurements

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吐酸病患者中医情志辨证疗效的单中心回顾性研究

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中国中西医结合消化杂志 2023年第7期31卷 523-526页

作者：弓艳霞唐艳萍郝旭雯刘茜刘莹康丽丽天津市南开医院消化科天津300100

目的回顾性研究21010例吐酸病患者的基本资料,包括病因、心理评估、中医辨证分型,重点分析中医情志辨证施治的功效,为临床加强心身治疗提供依据。方法收集2016年1月-2018年12月就诊于消化科的吐酸病患者的病历资料,按照病因分为反流性... 详细信息

目的回顾性研究21010例吐酸病患者的基本资料,包括病因、心理评估、中医辨证分型,重点分析中医情志辨证施治的功效,为临床加强心身治疗提供依据。方法收集2016年1月-2018年12月就诊于消化科的吐酸病患者的病历资料,按照病因分为反流性食管炎(reflux esophagitis,RE)、非糜烂性反流病(non-erosive reflux disease,NERD)、反流高敏感(reflux hypersensitivity,RH)、功能性烧心(functional heartburn,FH)4个组,统计各组患者的一般资料、情志因素、汉密尔顿焦虑量表(Hamilton anxiety scale,HAMA)和汉密尔顿抑郁量表(Hamilton depression Scale,HAMD)评分,重点分析中医情志辨证治疗对于吐酸病患者症状缓解的有效率。结果筛选吐酸病患者21010例,男8864例,女12146例,发病年龄40~60岁。病因:RE患者6284例(29.9%),NERD患者10426例(49.6%),RH患者2430例(11.6%),FH患者1870例(8.9%)。该类症状患者中合并情志障碍者约占38%(7901/21010),主要表现为焦虑、抑郁及睡眠障碍。其中RE患者1131例(18%),NERD患者3649例(35%),RH患者1531例(63%),FH患者1590例(85%),结果FH>RH>NERD>RE,差异有统计学意义(P<0.05),8周质子泵抑制剂治疗后有效率分别为89%、72%、54%、0;部分予以中医情志辨证施治2周,各组有效率均有提升,总有效率为76%,其中FH组有效率提升52%,差异有统计学意义(P<0.05)。结论吐酸病主要病因包括NERD、RE、RH及FH。患者多合并焦虑、抑郁情绪,该类患者加强心身治疗至关重要,中医情志调节可提高质子泵抑制剂治疗的疗效。

关键词：吐酸病反流性食管炎非糜烂性食管炎反流高敏感功能性烧心情志中医辨证

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医疗美容纠纷司法鉴定若干问题的研究

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中国卫生法制 2023年第4期31卷 26-30,39页

作者：宋健文刘斌周旭文广东司法警官职业学院广州510520 广东正理法医临床司法鉴定所广东揭阳市522000

当前医疗美容行业蓬勃发展,但由于相关法律法规不完善等问题,医疗美容纠纷频发。医疗美容造成损害后果而引发纠纷可以提起医疗损害责任纠纷诉讼。医疗损害鉴定意见作为科学证据,为医疗美容纠纷解决提供技术支持。然而,目前医疗损害鉴定... 详细信息

当前医疗美容行业蓬勃发展,但由于相关法律法规不完善等问题,医疗美容纠纷频发。医疗美容造成损害后果而引发纠纷可以提起医疗损害责任纠纷诉讼。医疗损害鉴定意见作为科学证据,为医疗美容纠纷解决提供技术支持。然而,目前医疗损害鉴定尚未建立系统的理论体系,也缺乏规范的鉴定程序,作为新兴行业的医疗美容,相关研究几乎空白。根据医疗美容的特点,结合相关案例及文献,围绕鉴定制度与管理、技术鉴定中常见的几个问题进行探讨,以期为鉴定实践提供参考。

关键词：医疗美容医疗损害鉴定医疗纠纷诊疗义务同行评议

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Planar p-n Junction Engineering toward Reconfigurable Organic Synaptic Transistors for High-Accuracy Neuromorphic Recognition

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SMALL 2025年 e2502740页

作者： Dong, Weijia Wang, Shiyu Zhao, Bin Xu, Chenhui liu, Yuqian An, Chuanbin Zhang, xuwen Qi, Minghao Han, Yang Geng, Yanhou Tianjin Univ Sch Mat Sci & Engn Tianjin Key Lab Mol Optoelect Sci Minist EducCollaborat Innovat Ctr Chem Sci & Engn Tianjin 300072 Peoples R China SINOPEC Beijing Res Inst Chem Ind Co Ltd Beijing 100013 Peoples R China Fudan Univ Inst Elect Light Sources Sch Informat Sci & Technol Shanghai 200433 Peoples R China Joint Sch Natl Univ Singapore & Tianjin Univ Int Campus Tianjin Univ Fuzhou 350207 Peoples R China State Key Lab Photovolta Sci & Technol Trina Solar Changzhou 213031 Peoples R China

Synaptic transistors are pivotal for hardware-level neuromorphic computing. However, the lack of switching behavior diversity has limited the implementation of advanced computing tasks, which are constrained by traditional interfacial or uncontrollable materials engineering. Here, a universal planar p-n junction structure is devised, with rational alignment of energy levels between crosslinkable p-type poly(indacenodithiophene-alt-benzothiadizole)-based conjugated polymer with hydroxyl groups at the ends of its side chains (OH-IDTBT-10%) and different n-type conjugated polymers, fabricated through efficient solution processing. This structure enables reconfigurable switching of p-type and n-type carrier transport by modifying the transistor architecture, along with significant non-volatile memory and synaptic plasticity. By strategically adjusting crosslinkers, a large memory window up to 48.5 V is achieved, sustained performance over 500 cycles, and a diverse array of synaptic behaviors modulated by electrical pulses. The underlying mechanism involves quantum well-like structures and discrete physical charge traps at the bilayer interface. The versatility of the strategy is proven across different n-type polymer systems. An artificial neural network (ANN) constructed by these devices affords a remarkably high facial recognition accuracy of 97.58% using the Yale Face Database with minimized training epochs of 200. This design provides an opportunity for high performance hardware with diverse synaptic behaviors in advanced neuromorphic computing.

关键词： facial recognition neuromorphic computing organic semiconductors planar p-n junction synaptic transistors

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知识驱动的船舶分段建造车间在线调度方法

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船舶工程 2023年第7期45卷 156-161,169页

作者：陈冶景旭文刘磊李海鹏康超刘金锋江苏科技大学机械工程学院江苏镇江212100 招商局邮轮制造有限公司江苏南通226116

针对船舶分段建造车间工位利用率低的问题,提出基于聚类算法的知识驱动船舶分段建造车间在线调度方法。利用DBSCAN算法对小组立参数进行聚类,并提取簇中的调度特征参数,作为该簇的调度知识;对于待加工小组立,依据参数数据确定归属的聚类... 详细信息

针对船舶分段建造车间工位利用率低的问题,提出基于聚类算法的知识驱动船舶分段建造车间在线调度方法。利用DBSCAN算法对小组立参数进行聚类,并提取簇中的调度特征参数,作为该簇的调度知识;对于待加工小组立,依据参数数据确定归属的聚类簇,并为其绑定该簇调度知识。实例验证表明,知识驱动的在线调度方法相对于传统的调度方法,车间工位平均利用率提升了7.97%,说明采用文章提出的在线调度方法可有效改善分段建造车间调度问题。

关键词：船舶建造聚类算法调度知识知识驱动

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国外绿色建造发展经验与启示

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绿色建造与智能建筑 2024年第4期 13-19页

作者：卢昱杰刘缘诚王娜肖绪文同济大学土木工程学院建筑工程系上海200092 同济大学工程结构性能演化与控制教育部重点实验室上海200092 中国建筑股份有限公司北京100029

近年来,建筑行业带来的环境污染和气候变化问题受到国际社会的高度重视,绿色建造已成为建筑行业发展的必然趋势。本文在明确绿色建造概念的基础上,梳理了英国、美国、新加坡在绿色建造领域的典型举措,归纳出国外经验对我国绿色建造发展... 详细信息

近年来,建筑行业带来的环境污染和气候变化问题受到国际社会的高度重视,绿色建造已成为建筑行业发展的必然趋势。本文在明确绿色建造概念的基础上,梳理了英国、美国、新加坡在绿色建造领域的典型举措,归纳出国外经验对我国绿色建造发展的启示。最后结合我国绿色建造发展现状,从政策法规、技术体系、示范推广三方面提出了建议。

关键词：绿色建造国外经验政策法规对策建议

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Mapping of Soil Liquefaction Associated with the 2021 Mw 7.4 Maduo (Madoi) Earthquake Based on the UAV Photogrammetry Technology

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REMOTE SENSING 2023年第4期15卷 1032页

作者： Wang, Wenxin Jing, liu-Zeng Shao, Yanxiu Wang, Zijun Han, Longfei Shen, xuwen Qin, Kexin Gao, Yunpeng Yao, Wenqian Hu, Guiming Zeng, Xianyang liu, Xiaoli Wang, Wei Cui, Fengzhen liu, Zhijun Li, Jinyang Tu, Hongwei Tianjin Univ Inst Surface Earth Syst Sci Sch Earth Syst Sci Tianjin 300072 Peoples R China China Earthquake Adm Inst Geol State Key Lab Earthquake Dynam Beijing 100029 Peoples R China China Earthquake Adm Inst Seismol Key Lab Earthquake Geodesy Wuhan 430071 Peoples R China Earthquake Agcy Qinghai Prov Xining 810001 Peoples R China

The 2021 Mw 7.4 Maduo (Madoi) earthquake that struck the northern Tibetan Plateau resulted in widespread coseismic deformation features, such as surface ruptures and soil liquefaction. By utilizing the unmanned aerial vehicle (UAV) photogrammetry technology, we accurately recognize and map 39,286 liquefaction sites within a 1.5 km wide zone along the coseismic surface rupture. We then systematically analyze the coseismic liquefaction distribution characteristics and the possible influencing factors. The coseismic liquefaction density remains on a higher level within 250 m from the surface rupture and decreases in a power law with the increasing distance. The amplification of the seismic waves in the vicinity of the rupture zone enhances the liquefaction effects near it. More than 90% of coseismic liquefaction occurs in the peak ground acceleration (PGA) > 0.50 g, and the liquefaction density is significantly higher in the region with seismic intensity > VIII. Combined with the sedimentary distribution along-strike of the surface rupture, the mapped liquefaction sites indicate that the differences in the sedimentary environments could cause more intense liquefaction on the western side of the epicenter, where loose Quaternary deposits are widely spread. The stronger coseismic liquefaction sites correspond to the Eling Lake section, the Yellow River floodplain, and the Heihe River floodplain, where the soil is mostly saturated with loose fine-grained sand and the groundwater level is high. Our results show that the massive liquefaction caused by the strong ground shaking during the Maduo (Madoi) earthquake was distributed as the specific local sedimentary environment and the groundwater level changed.

关键词： soil liquefaction Maduo (Madoi) earthquake earthquake ground motion sedimentary environment UAV photogrammetry technology

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裂缝性注水开发油藏多轮次调剖机理研究

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油气藏评价与开发 2018年第2期8卷 68-72页

作者：何涛王健余恒徐鹏刘旭文西南石油大学油气藏地质及开发工程国家重点实验室四川成都610500

为了探讨多方向见水井控水的技术对策,有必要弄清油藏多方向见水规律,认识多轮次调剖技术的调剖机理。实验通过设计制作平面裂缝—基质可视化模型,模型为一注三采,不同注采端口之间的渗透率不同,研究在裂缝—基质条件下凝胶的运移特征... 详细信息

为了探讨多方向见水井控水的技术对策,有必要弄清油藏多方向见水规律,认识多轮次调剖技术的调剖机理。实验通过设计制作平面裂缝—基质可视化模型,模型为一注三采,不同注采端口之间的渗透率不同,研究在裂缝—基质条件下凝胶的运移特征及封堵机理,后续水驱的液流改向,残余油的分布特征;通过不等渗透率并联填砂管岩心流动实验,模拟油藏的层间非均质性,对单次调剖和多级调剖操作的实验数据进行对比。实验结果发现对于裂缝性油藏,多轮次调剖可以充分发挥协同作用提高调剖效果,能使裂缝渗流通道得到有效封堵,具有良好的促进后续流体转向的作用,且调剖效果存在逐次递减现象;多轮次调剖技术较单次调剖技术能更好适用于裂缝性地质构造的调剖施工作业,起到更好的缓解层间矛盾的作用。

关键词：裂缝性油藏物理模拟可视化模型多方向见水多轮次调剖提高采收率

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Digital twin-based process reuse and evaluation approach for smart process planning

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INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2019年第5-8期100卷 1619-1634页

作者： liu, Jinfeng Zhou, Honggen Tian, Guizhong liu, Xiaojun Jing, xuwen Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Jiangsu Peoples R China Jiangsu Univ Sci & Technol Jiangsu Prov Key Lab Adv Mfg Marine Mech Equipmen Zhenjiang 212003 Jiangsu Peoples R China Hudong Heavy Machinery Co Ltd Shanghai 200129 Peoples R China Southeast Univ Sch Mech Engn Nanjing 210096 Jiangsu Peoples R China

With the advances in new-generation information technologies, smart process planning is becoming the focus for smart process planning with less time and lower cost. Big data-based reusing and evaluating the multi-dimensional process knowledge is widely accepted as an effective strategy for improving competitiveness of enterprises. However, there was little research on how to reuse and evaluate process knowledge with dynamical changing machining status. In this paper, we propose a novel digital twin-based approach for reusing and evaluating process knowledge. First, the digital twin-based process knowledge model which contains the geometric information and real-time process equipment status is introduced to represent the purpose and requirement of machining planning. Second, the process big data is constructed based on the three-layer and its association rules for accumulating process knowledge. Moreover, the similarity calculation algorithm of the scene model is proposed to filter the unmatched process knowledge. For accurately reusing the process knowledge, the process reusability evaluation approach of the candidate knowledge set is presented based on the real-time machining status and the calculated confidence. Finally, the diesel engine parts are applied in the developed prototype module to verify the effectiveness of the proposed method. The proposed method can promote the development and application of the smart process planning.

关键词： Digital twin Process knowledge Process big data Feature vector Reusability evaluation

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