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A large-area AgNW-modified textile with high-performance electromagnetic interference shielding

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npj Flexible Electronics 2020年第1期4卷 102-108页

作者： Junchen liu Sen Lin Kai Huang Chao Jia Qingmin wang Ziwei Li Jianan Song Zhenglian liu haiyang wang Ming Lei Hui Wu State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and Telecommunications100876 BeijingChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua University100084 BeijingChina

Manufacturing a flexible,light,large-area,and high-efficiency electromagnetic shielding materials in a straightforward and cost-effective manner presently remains a significant *** this work,we propose a conductive network design and verify its electromagnetic interference(EMI)shielding effectiveness(SE)by *** the structure and parameters obtained by simulation,we prepare a flexible EMI shielding material using silver nanowires(AgNWs)/polyvinyl butyral(PVB)ethanol solution and textile substructure via a facile immersing *** the frequency range of 5-18 GHz,the AgNWs/PVB textile with 1.4 mm thickness achieves an EMI SE of 59 dB,which exceeds the requirements for commercial *** to the low density of 56 mg/cm^(3),specific shielding effectiveness(SSE)of this material reaches 1053 dB m^(3)/*** is found that the AgNWs/PVB textile is more resistant to washing with water and oxidation than AgNWs textile without a PVB *** a result,the conductivity of AgNWs/PVB textile exhibits no change after washing with water and varies slightly after being kept in hot *** find that a signal monitor is unable to detect a signal emitted by a mobile phone from a jacket lined with AgNWs/PVB ***/PVB textile with these properties can be mass-produced as high-efficiency EMI shielding material for commercial applications.

关键词： high shielding silver

CUL4B orchestrates mesenchymal stem cell commitment by epigenetically repressing KLF4 and C/EBPδ

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Bone Research 2023年第2期11卷 427-441页

作者： Ruiqi Yu Hong Han Shuxian Chu Yijun Ding Shiqi Jin Yufeng wang Wei Jiang Yuting liu yongxin Zou Molin wang Qiao liu Gongping Sun Baichun Jiang Yaoqin Gong The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Genetics School of Basic Medical SciencesCheeloo College of MedicineShandong UniversityJinan 250012China The Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education and Institute of Liquid Metal and Casting Technology School of Materials Science and EngineeringShandong UniversityJinan 250012China The Key Laboratory of Experimental Teratology of the Ministry of Education and Department of Histology and Embryology School of Basic Medical SciencesCheeloo College of MedicineShandong UniversityJinan 250012China

Dysregulated lineage commitment of mesenchymal stem cells(MSCs)contributes to impaired bone formation and an imbalance between adipogenesis and osteogenesis during skeletal aging and *** intrinsic cellular mechanism that regulates MSC commitment remains ***,we identified Cullin 4B(CUL4B)as a critical regulator of MSC ***4B is expressed in bone marrow MSCs(BMSCs)and downregulated with aging in mice and *** knockout of Cul4b in MSCs resulted in impaired postnatal skeletal development with low bone mass and reduced bone ***,depletion of CUL4B in MSCs aggravated bone loss and marrow adipose accumulation during natural aging or after *** addition,CUL4B deficiency in MSCs reduced bone ***,CUL4B promoted osteogenesis and inhibited adipogenesis of MSCs by repressing KLF4 and C/EBPδexpression,*** CUL4B complex directly bound to Klf4 and Cebpd and epigenetically repressed their ***,this study reveals CUL4B-mediated epigenetic regulation of the osteogenic or adipogenic commitment of MSCs,which has therapeutic implications in osteoporosis.

关键词： CUL4B impaired epigenetic

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北部湾盆地始新世古环境演化及沉积学意义

成都理工大学学报（自然科学版） 2024年第2期51卷 193-209页

作者：黄侠超钟瀚霆曹海洋肖伶俐陈莹王文楷常晓琳刘欣春王琛宇高凌雪侯明才自然资源部深时地理环境重建与应用重点实验室(成都理工大学) 成都610059 成都理工大学沉积地质研究院成都610059 油气藏地质及开发工程全国重点实验室(成都理工大学) 成都610059 中海油研究总院有限责任公司北京100028 西昌学院资源与环境学院四川西昌615000

保存在地层中的孢粉化石是研究古植被、古气候变化的关键对象之一,对于重建古环境、预测烃源岩富集、指导油气勘探具有重要意义。本研究选取中国南海北部湾盆地乌石凹陷的WS-X1井、WS-X2井、海中凹陷的WZ-X3井、福山凹陷的JH-X4井始新... 详细信息

保存在地层中的孢粉化石是研究古植被、古气候变化的关键对象之一,对于重建古环境、预测烃源岩富集、指导油气勘探具有重要意义。本研究选取中国南海北部湾盆地乌石凹陷的WS-X1井、WS-X2井、海中凹陷的WZ-X3井、福山凹陷的JH-X4井始新世时期的孢粉进行分析,以揭示北部湾盆地始新世植被特征及其反映的古环境演化。研究共发现孢粉化石4大类共49个孢粉类型,以被子植物花粉占优势,其中栎粉Quercoidites(microhenrici+minutus)、三沟粉Tricolpopollenites、桤木粉Alnipollenites含量较高;裸子植物中以松粉Pinuspollenites为主;蕨类植物孢子以水龙骨单缝孢Polypodiaceaesporites、紫萁孢Osmundacidites为主;同时出现大量藻类,以盘星藻Pediastrum为主。4口井中,始新世亚热带类群丰富且花粉含量高,孢粉组合反映了北部湾盆地该时期发育以常绿栎类丰富为特征的林地,盆地低山地带发育常绿和落叶阔叶混交林为主的森林植被,林下为蕨类植被,指示了北部湾盆地始新世时期为温暖湿润的热带—亚热带气候。始新世早期分布的喜热植被较晚期更多,且在始新世晚期出现喜温的植被,推测始新世早期到晚期气候呈逐渐变凉的趋势。此外,孢粉组合中出现大量藻类,推测当时的沉积环境主要以湖泊和滨海的河流沼泽相为主。通过对北部湾盆地始新世时期的孢粉资料进行分析,为该盆地始新世时期的气候研究提供了更多依据。

关键词：始新世孢粉古气候古植被北部湾盆地

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玄武岩棉不锈钢长丝复合纱的制备及性能研究

棉纺织技术 2024年第9期52卷 24-28页

作者：王海洋高灿钰刘爱嘉钱迅曹吉强新疆大学新疆乌鲁木齐830017

为探究基于展丝机构制备的玄武岩棉不锈钢长丝复合纱的性能,利用多轴系复合纺纱技术制备了展丝玄武岩棉不锈钢长丝复合纱,对展丝和未展丝复合纱线的捻度、毛羽数、条干均匀度、强伸性能进行测试和对比。研究表明:与未展丝结构复合纱相比... 详细信息

为探究基于展丝机构制备的玄武岩棉不锈钢长丝复合纱的性能,利用多轴系复合纺纱技术制备了展丝玄武岩棉不锈钢长丝复合纱,对展丝和未展丝复合纱线的捻度、毛羽数、条干均匀度、强伸性能进行测试和对比。研究表明:与未展丝结构复合纱相比,展丝结构复合纱的平均捻度减少了6.33%,捻度不匀率降低;经过展丝后玄武岩单丝宽度增加,有利于对芯纱表面棉纤维进行包覆,使展丝结构复合纱的3 mm毛羽数减少39.18%、片段长度重量CV值降低1.53个百分点;断裂强力和断裂伸长率分别提高了13.49%、31.37%。认为:利用展丝结构和调控纱线结构的方式可以显著提高复合纱的性能,同时结合多功能纺织材料,可以制备高品质、高性能的功能性复合纱线。

关键词：多轴系纺纱展丝机构成纱机理结构复合纱纱线性能

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单孔腹腔镜治疗肠套叠中腹内复位与腹外复位的疗效对比

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成都医学院学报 2024年第1期19卷 80-83,88页

作者：刘红霞宋翠萍李豪饶旺张海洋新乡医学院第一附属医院小儿外科新乡453199

目的探讨单孔腹腔镜治疗肠套叠中腹内复位与腹外复位的疗效。方法将新乡医学院第一附属医院2018年10月至2021年11月以彩色多普勒超声仪确诊的81例肠套叠患儿作为研究对象,所有患儿均行单孔腹腔镜治疗,治疗过程中根据复位方法不同分为腹... 详细信息

目的探讨单孔腹腔镜治疗肠套叠中腹内复位与腹外复位的疗效。方法将新乡医学院第一附属医院2018年10月至2021年11月以彩色多普勒超声仪确诊的81例肠套叠患儿作为研究对象,所有患儿均行单孔腹腔镜治疗,治疗过程中根据复位方法不同分为腹内复位组和腹外复位组。收集患儿临床指标:血便、阵发性哭闹或腹痛、呕吐、腹部包块、肠套叠类型、病程;记录患儿手术时间、术中出血量、住院时间、术后排气/排便时间;记录术后感染、出血、肠黏连、肠梗阻、肠穿孔、复发情况和患儿家属满意度情况。结果腹内复位组、腹外复位组临床特征、肠套叠类型、病程、术中出血量、术后排气/排便时间、住院时间、术后感染、出血、肠黏连、肠梗阻、肠穿孔情况差异均无统计学意义(P>0.05),两组患儿均未复发肠套叠;与腹内复位组相比,腹外复位组手术时间降低、患儿家属满意度增加(P<0.05)。结论单孔腹腔镜治疗肠套叠中腹外复位患儿手术时间短、患儿家属满意度高,值得临床推广。

关键词：单孔腹腔镜肠套叠腹内复位腹外复位

基于卷积神经网络立体匹配的变电站三维信息感知方法分析

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电子技术（上海） 2024年第6期53卷 88-89页

作者：刘金柱刘军王青闫海洋李智恒李凌云河南送变电建设有限公司河南450051 南京斯泰恩智慧能源技术有限公司江苏211899

阐述针对变电站复杂多变的环境,提出基于卷积神经网络立体匹配的变电站三维信息感知方法,包括构建变电站三维信息实时感知框架,提出基于双重注意力机制的立体匹配模型。

关键词：双目立体匹配 PSMNet 三维信息感知

Influence Mechanism of Cerium on the Threshold of Short Fatigue Crack for Aluminum-lithium Alloy 2090

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Rare Metals 2001年第1期20卷 32-37页

作者： Zheng Chen, yongxin wang, Bing liu, Xiaoling Li, Qilong Wei (School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China) 西北工业大学陕西西安 710072

The thresholds of short fatigue cracks for aluminum-lithium alloys 2090 and 2090+Ce are quantitatively evaluated. The essential reason resulting in stronger short crack effect has been ascertained. Influence of cerium on the threshold of short fatigue cracks for aluminum-lithium alloy 2090 was investigated. The results show that, by adding Ce into this alloy, DeltaK(i) and DeltaK(***) are increased. The influence mechanism of Ce on the threshold of short fatigue crack for alloy 2090 was explored fi om the bound energy, T, phase, the energy of anti-phase boundary, the energy of super-lattice intrinsic stacking fault and the electron bonds. By adding Ce into alloy 2090, the bound energy of Cu atom in this alloy is increased; the effect of thinning and dispersing T, phase is obtained; the effect of increasing the energy of anti-phase boundary and decreasing the energy of super-lattice intrinsic stacking fault for delta ' phase can be achieved.

关键词： aluminum-lithium alloy Ce short fatigue crack bound energy fault energy

Integrated representation of geospatial data,model,and knowledge for digital twin railway

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International Journal of Digital Earth 2022年第1期15卷 1657-1675页

作者： Hankan Li Qing Zhu Liguo Zhang Yulin Ding yongxin Guo Haoyu Wu Qiang wang Runfang Zhou Mingwei liu Yan Zhou Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengduChina Faculty of Geomatics Lanzhou Jiaotong UniversityLanzhouPeople’s Republic of China School of Resources and Environment University of Electric Science and Technology of ChinaChengduPeople’s Republic of China The Key Laboratory of Urban Land Resources Monitoring and Simulation Ministry of Natural ResourcesShenzhenPeople’s Republic of China

The real-time accurate description of all spatial features of railway and their spatiotemporal relationships is a crucial factor in realizing comprehensive management and related decision-making within the entire life cycle of ***,available spatiotemporal data models mainly use static historical sequence data,which are insufficient to support multi-source heterogeneous real-time sensed data;they lack a systematic depiction of the interactive relationships among multiple feature entities,and are limited to low-level descriptive ***,this study proposes a data-model-knowledge integrated representation data model for a digital twin railway,which explicitly describes the spatiotemporal,and interaction relationships among railway features through a conceptual knowledge *** study first analyzes the characteristics of railway features from above ground to underground,and then constructs a conceptual model to clearly describe the complex relationships among railway ***,a logical model is developed to illustrate the basic data ***,an ontology model is constructed as a basic framework for further deepening the domain knowledge ***,considering the prevention of landslides as an example,it demonstrates the abundant spatiotemporal relationships among railway related *** results of this study bring more clear understanding of the complex interactive relationships of railway entities.

关键词： Digital twin railway data-model-knowledge spatiotemporal relationships

中医药调控Nrf2信号通路防治顺铂所致肝肾损伤研究进展

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中医学报 2024年第7期39卷 1454-1461页

作者：王永欣刘亚敏滕迎春谷文琪韩乐王建明王晴晴吴昊刘文娇河南中医药大学针灸推拿学院河南郑州450046 河南中医药大学药学院河南郑州450046 河南中医药大学第一附属医院河南郑州450000 河南中医药大学儿科医学院河南郑州450046

核因子E2相关因子2(nuclear factor E2-related factor 2,Nrf2)信号通路的激活是改善顺铂肝肾毒性的重要保护机制之一,中医药可通过调控Nrf2信号通路提升机体抗氧化应激能力,改善顺铂所致肝肾损伤,如以黄酮类、酚类及萜类化合物为主的... 详细信息

核因子E2相关因子2(nuclear factor E2-related factor 2,Nrf2)信号通路的激活是改善顺铂肝肾毒性的重要保护机制之一,中医药可通过调控Nrf2信号通路提升机体抗氧化应激能力,改善顺铂所致肝肾损伤,如以黄酮类、酚类及萜类化合物为主的中药单体有效成分及六味地黄丸、肾复舒颗粒等中药复方。但目前中医药调控Nrf2信号通路防治顺铂所致肝肾损伤的研究尚存在不足之处,如Nrf2信号通路常与丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)、核因子-κB(nuclear factor-κB,NF-κB)、磷脂酰肌醇3-激酶(phosphatidylinositol 3-kinase,PI3K)/蛋白激酶B(protein kinase B,AKT)等信号通路协同发挥提升机体抗氧化应激能力、抑制凋亡、抗纤维化等作用,但各通路间的交叉机制有待阐明;部分中药存在水溶性差、生物利用度低等局限性;中药复方活性成分复杂性,药理药效作用尚未明确;对针灸疗法研究的深度及广度不够。今后需进一步加强基础实验设计的标准化、规范化,为中医药治疗顺铂所致肝肾损伤提供依据,发挥中医药增效减毒之效。

关键词：肝肾损伤顺铂 Nrf2信号通路 MAPK NF-κB PI3K/Akt