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3D near-surface P-wave velocity structure imaging with Distributed Acoustic Sensing and electric hammer source

Earthquake Research Advances 2024年第3期4卷 27-33页

作者： heting Hong Fu Yin Yuhang Lei Yulan Li Baoshan Wang Deep Space Exploration Laboratory University of Science and Technology of ChinaHefei230026China School of Earth and Space Sciences University of Science and Technology of ChinaHefei230026China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei230026China

Distributed Acoustic Sensing(DAS) is an emerging technique for ultra-dense seismic observation, which provides a new method for high-resolution sub-surface seismic imaging. Recently a large number of linear DAS arrays have been used for two-dimensional S-wave near-surface imaging in urban areas. In order to explore the feasibility of three-dimensional(3D) structure imaging using a DAS array, we carried out an active source experiment at the Beijing National Earth Observatory. We deployed a 1.km optical cable in a rectangular shape, and the optical cable was recast into 250 sensors with a channel spacing of 4 m. The DAS array clearly recorded the P, S and surface waves generated by a hammer source. The first-arrival P wave travel times were first picked with a ShortTerm Average/Long-Term Average(STA/LTA) method and further manually checked. The P-wave signals recorded by the DAS are consistent with those recorded by the horizontal components of short-period seismometers. At shorter source-receiver distances, the picked P-wave arrivals from the DAS recording are consistent with vertical component recordings of seismometers, but they clearly lag behind the latter at greater *** is likely due to a combination of the signal-to-noise ratio and the polarization of the incoming wave. Then,we used the Tomo DD software to invert the 3D P-wave velocity structure for the uppermost 50 m with a resolution of 1. m. The inverted P-wave velocity structures agree well with the S-wave velocity structure previously obtained through ambient noise tomography. Our study indicates the feasibility of 3D near-surface imaging with the active source and DAS array. However, the inverted absolute velocity values at large depths may be biased due to potential time shifts between the DAS recording and seismometer at large source-receiver distances.

关键词： Distributed Acoustic Sensing(DAS) Near-surface structure First-arrival travel time tomography Body wave Active source

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Intelligent Recognition Using Ultralight Multifunctional Nano‑Layered Carbon Aerogel Sensors with Human‑Like Tactile Perception

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Nano-Micro Letters 2024年第1期16卷 172-186页

作者： Huiqi Zhao Yizheng Zhang Lei Han Weiqi Qian Jiabin Wang heting Wu Jingchen Li Yuan Dai Zhengyou Zhang Chris RBowen Ya Yang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro‑Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400People’s Republic of China Tencent Robotics X Shenzhen 518054People’s Republic of China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049People’s Republic of China Department of Mechanical Engineering University of BathBath BA27AKUK Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004People’s Republic of China

Humans can perceive our complex world through multi-sensory *** limited visual conditions,people can sense a variety of tactile signals to identify objects accurately and ***,replicating this unique capability in robots remains a significant ***,we present a new form of ultralight multifunctional tactile nano-layered carbon aerogel sensor that provides pressure,temperature,material recognition and 3D location capabilities,which is combined with multimodal supervised learning algorithms for object *** sensor exhibits human-like pressure(0.04–1.0 kPa)and temperature(21.5–66.2℃)detection,millisecond response times(1. ms),a pressure sensitivity of 92.22 kPa^(−1.and triboelectric durability of over 6000 *** devised algorithm has universality and can accommodate a range of application *** tactile system can identify common foods in a kitchen scene with 94.63%accuracy and explore the topographic and geomorphic features of a Mars scene with 1.0%*** sensing approach empowers robots with versatile tactile perception to advance future society toward heightened sensing,recognition and intelligence.

关键词： Multifunctional sensor Tactile perception Multimodal machine learning algorithms Universal tactile system Intelligent object recognition

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The endoplasmic reticulum membrane protein complex subunit Emc6 is essential for rhodopsin localization and photoreceptor cell survival

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Genes & Diseases 2024年第2期11卷 1035-1049页

作者： Kuanxiang Sun Lu Liu Xiaoyan Jiang heting Wang Lin Wang Yeming Yang Wenjing Liu Lin Zhang Xiaohui Zhao Xianjun Zhu Health Management Center Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Key Laboratory of Tibetan Medicine Research Chinese Academy of Sciences and Qinghai Provincial Key Laboratory of Tibetan Medicine ResearchNorthwest Institute of Plateau BiologyXiningQinghai 810008China The Sichuan Provincial Key Laboratory for Human Disease Gene Study and Department of Laboratory Medicine Center for Medical GeneticsSichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences (201.RU026) Sichuan Academy of Medical Sciences and Sichuan Provincial People's HospitalChengduSichuan 610072China Department of Ophthalmology The First People's Hospital of ShangqiuShangqiuHenan 476000China

The endoplasmic reticulum(ER)membrane protein complex(EMC)is responsible for monitoring the biogenesis and synthetic quality of membrane proteins with tail-anchored or multiple transmembrane *** EMC subunit EMC6 is one of the core members of EMC and forms an enclosed hydrophilic vestibule in cooperation with *** studies demonstrating that deletion of EMC3 led to rhodopsin mislocalization in rod photoreceptors of mice,the precise mechanism leading to the failure of rhodopsin trafficking remains ***,we generated the first rod photoreceptor-specific knockout of Emc6(RKO)and cone photoreceptor-specific knockout of Emc6(CKO)mouse *** of Emc6 in rod photoreceptors led to progressive shortening of outer segments(OS),impaired visual function,mislocalization and reduced expression of rhodopsin,and increased gliosis in rod *** addition,CKO mice displayed the progressive death of cone photoreceptors and abnormal localization of cone opsin ***,proteomics analysis of the RKO mouse retina illustrated that several cilium-related proteins,particularly anoctamin-2(ANO2)and transmembrane protein 67(TMEM67),were significantly down-regulated prior to OS *** rod photoreceptor cilia and mislocalized membrane disc proteins were evident in RKO *** data revealed that in addition to monitoring the synthesis of rhodopsin-dominated membrane disc proteins,EMC6 also impacted rod photoreceptors'ciliogenesis by regulating the synthesis of membrane proteins associated with cilia,contributing to the mislocalization of membrane disc proteins.

关键词： ANO2 Cilium EMC6 ER membrane protein complex Mislocalization Photoreceptor degeneration TMEM67

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Ultrasonic vibration enabled under-liquid forming of metallic glasses

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Science Bulletin 2024年第2期69卷 163-166页

作者： Xin Li Luyao Li Sajad Sohrabi Jia'nan Fu Zhen Li Zhe Chen Rongce Sun Yu Zhang Jinbiao Huang heting Zhang Jian Zhu Xiangyan Chen Kaikai Song Jiang Ma School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China State Key Laboratory of Radio Frequency Heterogeneous Integration College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China Shenzhen Research Institute of Shandong University Shenzhen 518057China

Advancements in forming technology offer significant advantages for the manufacturing industry,including enhanced efficiency,energy conservation,and improved material utilization[1..However,traditional additive manufacturing[2],thermoplastic forming[3],and laser cutting[4]encounter challenges when applied in under-liquid environments,mainly due to difficulties in temperature control and heat source provision.

关键词： glasses liquid metallic

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First complete genomic sequence analysis of canine distemper virus in wild boar

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Virologica Sinica 2024年第4期39卷 702-704页

作者： Tong Wang Haiying Du Na Feng Yuhang Liu Yu Xu heting Sun Peng Peng Siyuan Qin Xiaotian Zhang Yan Liu Mingyuan Yu Hongrui Liang Biao He Guoqiang Zhu Changchun Tu Zhongzhong Tu Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses Yangzhou UniversityYangzhou 225009China Changchun Veterinary Research Institute Chinese Academy of Agricultural SciencesChangchun 130122China Biological Disaster Control and Prevention Center National Forestry and Grassland AdministrationShenyang 110034China

Dear Editor,Canine distemper virus(CDV)is the causal agent of a highly contagious viral infectious disease that affects domestic and wild carnivores *** is an enveloped,non-segmented negative sense RNA virus that belongs to the Morbillivirus genus in Paramyxoviridae family,which contains viruses of epidemiological relevance to humans and *** on the variability of the hemagglutinin gene(H),CDV strains have been at least 21.major genetic lineages:America-1.to America-5,Canada-1.and-2,Asia-1.to Asia-6,Europe wild-life,Arctic,Africa-1.South Africa,Africa-2,South America-1.to South America-3 and Rockborn-like(Giacinti et al.,2022).Mutations in the binding sites of the H protein,which interact with viral entry receptors such as signaling lymphocytic activation molecule(SLAM)and nectin-4,are associated with the emergence of the disease in new host species(Beineke et al.,201.).

关键词： distemper Canada globally

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高职财经类专业虚拟仿真实训基地建设的价值意蕴、现实困境与实践路径

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中国职业技术教育 2024年第2期 19-25页

作者：周鹤婷吴峥浙江经济职业技术学院教务处浙江经济职业技术学院工商管理学院党总支

数字时代教育数字化成为支撑引领教育现代化的重要力量,其中虚拟仿真技术以独特的优势,为职业教育实训教学质量提升和教学创新提供了更多可能。面对数字时代高职财经类虚拟仿真建设的主观需求偏颇、片面技术依赖、人才培养支撑不足、运... 详细信息

数字时代教育数字化成为支撑引领教育现代化的重要力量,其中虚拟仿真技术以独特的优势,为职业教育实训教学质量提升和教学创新提供了更多可能。面对数字时代高职财经类虚拟仿真建设的主观需求偏颇、片面技术依赖、人才培养支撑不足、运行机制效益不高等问题,提出以数字时代人才培养新目标、新理念为引领,聚焦实训教学中的“三高三难”问题,创新应用虚拟仿真技术,推动实训课程体系重构,强化教师创新团队建设,深化虚拟仿真实训基地共建、共享、共用、共创。

关键词：高等职业教育财经类专业虚拟仿真基地建设实践路径

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深度神经网络动态分层梯度稀疏化及梯度合并优化方法

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西安交通大学学报 2024年第9期58卷 105-116页

作者：巨涛康贺廷刘帅火久元兰州交通大学电子与信息工程学院兰州730070

针对数据并行方法加速大规模深度神经网络时易出现的通信开销大、训练耗时长、资源利用率不高的问题,提出了一种深度神经网络动态分层梯度稀疏化及梯度合并优化方法。首先,将梯度稀疏化压缩与流水线并行技术相结合,提出动态分层梯度稀... 详细信息

针对数据并行方法加速大规模深度神经网络时易出现的通信开销大、训练耗时长、资源利用率不高的问题,提出了一种深度神经网络动态分层梯度稀疏化及梯度合并优化方法。首先,将梯度稀疏化压缩与流水线并行技术相结合,提出动态分层梯度稀疏优化方法,为每层神经网络匹配一个合适的阈值,通过在后续迭代时动态调整该阈值,实现对每层网络传输梯度的自适应压缩。然后,提出了层梯度合并方法,利用动态规划算法对层梯度合并时的通信开销、稀疏化及层梯度计算时间进行权衡优化,求解出最佳的层梯度合并组合,并将多层小尺度梯度张量合并为一层通信,以降低分层梯度决策时引入的过高通信延迟开销。最后,将求解出的最佳层梯度合并组合应用于具体的训练迭代过程。实验结果表明:与已有方法相比,所提方法可在保证模型训练精度的同时大大降低通信开销,提升模型的训练速度;与未压缩方法相比,训练速度最大可提升1.99倍。

关键词：深度神经网络分布式训练同步数据并行梯度压缩层梯度合并

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关于天然色素稳定性的综述

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食品工业 2024年第1期45卷 178-183页

作者：尹鹤婷上海太太乐食品有限公司上海202308

天然色素是一类广泛应用于食品、药品和化妆品等领域的重要成分。然而,天然色素的稳定性一直是制约其应用的一个关键问题。文章综述了天然色素稳定性的研究进展。首先,介绍了天然色素的来源和分类。然后,讨论了影响天然色素稳定性的因素... 详细信息

天然色素是一类广泛应用于食品、药品和化妆品等领域的重要成分。然而,天然色素的稳定性一直是制约其应用的一个关键问题。文章综述了天然色素稳定性的研究进展。首先,介绍了天然色素的来源和分类。然后,讨论了影响天然色素稳定性的因素,包括温度、pH、金属离子等。接着,总结了常用的提高天然色素稳定性的方法,如微胶囊化、复合包埋和辐照等。最后,展望了未来天然色素稳定性研究的发展方向,包括探索其使用的多样性,以实现新的创新和工业解决方案。研究结果对于识别目前天然色素稳定性的问题、推动天然色素在食品等领域的应用具有意义。

关键词：天然色素稳定性影响因素提高方法现状

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含沙流下双吸泵磨蚀特性分析

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机械管理开发 2024年第2期39卷 23-25页

作者：张河庭福建棉花滩水电开发有限公司福建龙岩364000

为深入分析含沙流下双吸泵磨蚀特点,采用RNGk-ε模型计算获得叶片正背面的剪切力、泥沙分布及固液滑移速度等参数,进而基于正交试验法对含沙量、沙粒直径和进口流速等对磨蚀的影响进行分析。研究表明,在含沙流下,叶片正、背面沙粒多集... 详细信息

为深入分析含沙流下双吸泵磨蚀特点,采用RNGk-ε模型计算获得叶片正背面的剪切力、泥沙分布及固液滑移速度等参数,进而基于正交试验法对含沙量、沙粒直径和进口流速等对磨蚀的影响进行分析。研究表明,在含沙流下,叶片正、背面沙粒多集中在进口处。固液滑移速度受沙粒直径影响最大,沙粒直径增大,固液滑移速度也随之增大。三种因素中,沙粒直径对双吸泵磨蚀的影响权重最大,含沙量其次,流量的影响相对较少。

关键词：双吸泵磨蚀固液滑移速度含沙流

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台湾地区对“反渗透法”的司法援引、适用及其影响

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闽台关系研究 2024年第2期 81-92页

作者：王鹤亭苏州大学马克思主义学院江苏苏州215006

台湾地区强力通过的“反渗透法”已成为民进党当局全面阻碍两岸民间交流、恐吓台湾地区民众及打压选举竞争对手的“法律工具”,对“反渗透法”的司法援引与适用也成为民进党当局制造“执政优势”“寒蝉效应”和“绿色恐怖”的重要手段... 详细信息

台湾地区强力通过的“反渗透法”已成为民进党当局全面阻碍两岸民间交流、恐吓台湾地区民众及打压选举竞争对手的“法律工具”,对“反渗透法”的司法援引与适用也成为民进党当局制造“执政优势”“寒蝉效应”和“绿色恐怖”的重要手段。相关案例大致可以分为涉案自然人引用、“法院”参考援引、“法院”裁定援引、“法院”判决适用等4种类型,司法裁判对“反渗透法”的援引和适用既是对条文空白授权及执行机关自由裁量权的认可,也体现了类推适用和扩张解释的逻辑。司法裁判将“受内地资助、委托或指示”作为违反“反渗透法”的构成要件,但又无视当事人主观意图和行为的客观效果,缺乏关于“实质控制力”的证据与论证。台湾地区对“反渗透法”的援引与适用违背法治原则、侵害人权自由,对两岸融合发展氛围、岛内民主机制运行环境和政治文化生态演进,以及台湾地区民众正当利益表达等都产生了消极影响。

关键词：台湾地区 “反渗透法” 援引与适用司法裁判

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