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Extracting Variable-Depth Logical Document Hierarchy from Long Documents:Method,Evaluation,and Application

Journal of Computer Science & Technology 2022年第3期37卷 699-718页

作者： rong-yu cao Yi-Xuan cao Gan-Bin Zhou Ping Luo Key Laboratory of Intelligent Information Processing of Chinese Academy of Sciences Institute of Computing TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China WeChat Search Application Department Tencent Holdings Ltd.Beijing 100080China Peng Cheng Laboratory Shenzhen 518066China

In this paper,we study the problem of extracting variable-depth"logical document hierarchy"from long documents,namely organizing the recognized"physical document objects"into hierarchical *** discovery of logical document hierarchy is the vital step to support many downstream applications(e.g.,passage-based retrieval and high-quality information extraction).However,long documents,containing hundreds or even thousands of pages and a variable-depth hierarchy,challenge the existing *** address these challenges,we develop a framework,namely Hierarchy Extraction from Long Document(HELD),where we"sequentially"insert each physical object at the proper position on the current *** whether each possible position is proper or not can be formulated as a binary classification *** further improve its effectiveness and efficiency,we study the design variants in HELD,including traversal orders of the insertion positions,heading extraction explicitly or implicitly,tolerance to insertion errors in predecessor steps,and so *** for evaluations,we find that previous studies ignore the error that the depth of a node is correct while its path to the root is *** such mistakes may worsen the downstream applications seriously,a new measure is developed for a more careful *** empirical experiments based on thousands of long documents from Chinese financial market,English financial market and English scientific publication show that the HELD model with the"root-to-leaf"traversal order and explicit heading extraction is the best choice to achieve the tradeoff between effectiveness and efficiency with the accuracy of 0.972,6,0.729,1 and 0.957,8 in the Chinese financial,English financial and arXiv datasets,***,we show that the logical document hierarchy can be employed to significantly improve the performance of the downstream passage retrieval *** summary,we conduct a systematic study on this task in terms of methods

关键词： logical document hierarchy long documents passage retrieval

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Genetic diversity and structure of Rhododendron meddianum,a plant species with extremely small populations

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Plant Diversity 2021年第6期43卷 472-479页

作者： Xiu-Jiao Zhang Xiong-Fang Liu De-Tuan Liu yu-rong cao Zheng-Hong Li Yong-Peng Ma Hong Ma Research Institute of Resources Insects Chinese Academy of ForestryKunming650224YunnanChina College of Forestry Nanjing Forestry UniversityNanjing210037JiangsuChina yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina yunnan Key Laboratory of Plant Reproductive Adaption and Evolutionary Ecology School of Ecology and Environmental ScienceYunnan UniversityKunming 650504YunnanChina

Rhododendron meddianum is a critically endangered species with important ornamental value and is also a plant species with extremely small *** this study,we used double digest restriction-siteassociated DNA sequencing(ddRAD)technology to assess the genetic diversity,genetic structure and demographic history of the three extant populations of *** of SNPs indicated that *** populations have a high genetic diversity(p?0.0772±0.0024,HE?0.0742±0.002).Both FST values(0.1582e0.2388)and AMOVA showed a moderate genetic differentiation among the *** ***,STRUCTURE,PCoA and NJ trees indicated that the *** samples were clustered into three distinct genetic *** the stairway plot,we found that *** underwent a population bottleneck about 70,000 years ***,demographic models of *** and its relative,Rhododendron cyanocarpum,revealed that these species diverged about 3.05(2.21e5.03)million years *** divergence may have been caused by environmental changes that occurred after the late Pliocene,e.g.,the Asian winter monsoon intensified,leading to a drier *** on these findings,we recommend that *** be conserved through in situ,ex situ approaches and that its seeds be collected for germplasm.

关键词： Rhododendron meddianum ddRAD Genetic diversity Population demography Conservation implications

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Super-resolution imaging of low-contrast periodic nanoparticle arrays by microsphere-assisted microscopy

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Chinese Physics B 2021年第4期30卷 193-197页

作者： Qin-Fang Shi Song-Lin Yang yu-rong cao Xiao-Qing Wang Tao Chen Yong-Hong Ye Department of Physics Nanjing Normal UniversityNanjing 210023China Advanced Photonics Center Southeast UniversityNanjing 210096China Jiangsu Provincial Key Laboratory of Advanced Robotics Soochow UniversitySuzhou 215123China

We use the label-free microsphere-assisted microscopy to image low-contrast hexagonally close-packed polystyrene nanoparticle arrays with diameters of 300 and 250 *** a nanoparticle array is directly placed on a glass slide,it cannot be *** a 30-nm-thick Ag film is deposited on the surface of a nanoparticle array,the nanoparticle array with nanoparticle diameters of 300 and 250 nm can be *** addition,the Talbot effect of the 300-nm-diameter nanoparticle array is also *** a nanoparticle sample is assembled on a glass slide deposited with a 30-nm-thick Ag film,an array of 300-nm-diameter nanoparticles can be *** propose that in microsphere-assisted microscopy imaging,the resolution can be improved by the excitation of surface plasmon polaritons(SPPs) on the sample surface or at the sample/substrate interface,and a higher near-field intensity due to the excited SPPs would benefit the resolution *** study of label-free super-resolution imaging of low-contrast objects will promote the applications of microsphere-assisted microscopy in life sciences.

关键词： super-resolution microsphere optical microscopy surface plasmon polariton

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Effects of Endometrial Stimulation Timings and Techniques on Pregnancy Outcomes in Patients without Prior Embryo Transfer: A Systematic Review and Meta-Analysis

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Reproductive and Developmental Medicine 2020年第3期4卷 169-176页

作者： yu-rong cao Hao Shi Jun Zhai Center for Reproductive Medicine The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China Henan Key Laboratory of Reproduction and Genetics The First Affiliated Hospital of Zhengzhou UniversityZhengzhou 450052China

Objective:To investigate the effects of endometrial stimulation timings and techniques on pregnancy outcomes in patients without prior embryo transfer(ET).Methods:We included a total of 10 studies related to the impact of endometrial stimulation on the pregnancy outcome of infertile patients with the first ET from 2010 to *** studies were found by searching databases including China Science and Technology Journal Database(VIP),Chinese Biological Med(CBM),Chinese Medical Current Content(CMCC),China National Knowledge Internet(CNKI),WanFang Med Online,Cochrane Library,Web of Science,PubMed,Medline,ScienceDirect,and EMBASE.A total of 1,983 cycles were included,of which 725 were cycles with endometrial *** outcomes included clinical pregnancy,implantation,abortion,multiple pregnancy,and live birth ***:The implantation rate(IR)was higher in the fresh cycle endometrial stimulation group than in the control group(relative risk[RR]=1.21,95%confidence interval[CI]=1.03-1.42;P=0.02),but there were no significant between-group differences in the live birth rate(LBR)and abortion rate(AR).Subgroup analysis showed that whether follicular or luteal endometrial stimulation was performed before the ET cycle had no effect on the clinical pregnancy outcome,and endometrial stimulation on the day of oocyte retrieval reduced the clinical pregnancy rate(CPR)(RR=0.37,95%CI=0.19-0.75;P=0.005).Whether the technique involved the use of a curette or catheter,there was no significant between-group difference in ***:Fresh cycle endometrial stimulation can improve the embryo IR in patients without prior ET,but it cannot increase CPR,LBR,or *** analysis showed that different endometrial stimulation timings and techniques did not significantly improve CPR and that endometrial stimulation on the day of oocyte retrieval reduced CPR.

关键词： Endometrial Injury Endometrial Stimulation In vitro Fertilization/Intracytoplasmic Sperm Injection Pregnancy Outcomes

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THE REDUCTION OF 4,4-DISUBSTTTUTED 3-OXABICYCLO[3.1.0]HEXAN-2-ONE

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Chinese Chemical Letters 1992年第10期3卷 773-774页

作者： Jie You XUE Shi Xiong TANG Fan WU yu rong cao Xiao Lan WANG Department of Chemistry Nankai UniversityTianjin 300071

Reduction of the title compounds with LiAIH_4 or DIBAL (diisobutyl aluminium hydride) leads to the formation of 2-(disubstituted hydroxymethyl)cyclopropanemethanol (2)or 4,4-disubstituted 3-oxabicyclo[3.1.0] hexan-2-o... 详细信息

关键词： THE REDUCTION OF 4,4-DISUBSTTTUTED 3-OXABICYCLO[3.1.0]HEXAN-2-ONE THF

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SYNTHESES AND OLFACTORY CHARACTERS OF SOME END-α-SUBSTITUTED-BICYCLO[2.2.2]OCTENYL(AND OCTANYL)METHANOLS

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Chinese Chemical Letters 1991年第1期2卷 1-2页

作者： Shi Xiong TANG Jia You XUE Xiu Lin WANG yu rong cao Xiao Lan WANG (Chemistry Department,Nankai University,Tianjin,300071)

Ten endo-a-substituted-bicyclo[2.2.2]octenyl(and octanyl)methanols were synthesized,their odors were evaluated. We have previously reported the syntheses and structure-odor relationship of two series of endo-bicyclo[2.2.1]heptenyl(and heptanyl)methanols^(1.2).In order to study the effect of the bicyclic skeleton on odor,ten of the title compounds have been synthesized.

关键词： ppm AND OCTANYL)METHANOLS SUBSTITUTED-BICYCLO[2.2.2]OCTENYL SYNTHESES AND OLFACTORY CHARACTERS OF SOME END

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SYNTHESIS OF 4-SUBSTITUTED (OR 4-SPIRO) 3-OXABICYCLO[3.1.0]HEXAN-2-ONE

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Chinese Chemical Letters 1991年第11期2卷 837-838页

作者： Jie You XUE, Shi Xiong TANG, Ai Bin SUN, Fan WU, Li Xin QIAO, yu rong cao, Xiao Lan WANG Department of Chemistry, Nankai University, Tianjin 300071

Cyclopropanedicarboxylic anhydride can be converted to 4-substituted (or 4-spiro-)3-oxabicyclo[3.1.0]hexan-2-one by addition of Grignard (or α,ω-di-Crignard) reagents in ether or tetrahydrofuran solution.

关键词： OXABICYCLO[3.1.0]HEXAN-2-ONE SYNTHESIS OF 4-SUBSTITUTED OR 4-SPIRO

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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for Sensitized Microwave Actuation and Self-Powered Motion Sensing

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NANO-MICRO LETTERS 2025年第1期17卷 1-15页

作者： Wang, yu-Ze Wang, yu-Chang Liu, Ting-Ting Zhao, Quan-Liang Li, Chen-Sha cao, Mao-Sheng Beijing Inst Technol Sch Mat Sci & Engn Beijing 100081 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China North China Univ Technol Sch Mech & Mat Engn Beijing 100144 Peoples R China Heilongjiang Univ Minist Educ Peoples Republ China Key Lab Funct Inorgan Mat Chem Harbin 150080 Peoples R China

Polymeric microwave actuators combining tissue-like softness with programmable microwave-responsive deformation hold great promise for mobile intelligent devices and bionic soft robots. However, their application is challenged by restricted electromagnetic sensitivity and intricate sensing coupling. In this study, a sensitized polymeric microwave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx (MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique space-charge polarization and interfacial polarization, resulting in significant improvements of 230% in the dielectric loss factor and 830% in the apparent efficiency of electromagnetic energy harvest. The sensitized microwave actuation demonstrates as the shortened response time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (up to 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combines driving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of similar to 3 mV) during actuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approach for developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest Self-sensing Soft actuator

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Recent Advances in Artificial Sensory Neurons: Biological Fundamentals, Devices, Applications, and Challenges

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NANO-MICRO LETTERS 2025年第1期17卷 1-49页

作者： Zhong, Shuai Su, Lirou Xu, Mingkun Loke, Desmond yu, Bin Zhang, Yishu Zhao, rong Guangdong Inst Intelligence Sci & Technol Zhuhai 519031 Hengqin Peoples R China Zhejiang Univ Coll Integrated Circuits Hangzhou 3112000 Peoples R China ZJU Hangzhou Global Sci & Technol Innovat Ctr Hangzhou 310027 Peoples R China Singapore Univ Technol & Design Dept Sci Math & Technol Singapore 487372 Singapore Tsinghua Univ Dept Precis Instruments Beijing 100084 Peoples R China Tsinghua Univ Ctr Brain Inspired Comp Res Beijing 100084 Peoples R China Tsinghua Univ IDG McGovern Inst Brain Res Beijing 100084 Peoples R China

Biological fundamentals and recent progress of artificial sensory neurons are systematically *** device, performance metrics, and potential applications of artificial sensory neurons are *** for the future development of artificial sensory neurons are discussed. Spike-based neural networks, which use spikes or action potentials to represent information, have gained a lot of attention because of their high energy efficiency and low power consumption. To fully leverage its advantages, converting the external analog signals to spikes is an essential prerequisite. Conventional approaches including analog-to-digital converters or ring oscillators, and sensors suffer from high power and area costs. Recent efforts are devoted to constructing artificial sensory neurons based on emerging devices inspired by the biological sensory system. They can simultaneously perform sensing and spike conversion, overcoming the deficiencies of traditional sensory systems. This review summarizes and benchmarks the recent progress of artificial sensory neurons. It starts with the presentation of various mechanisms of biological signal transduction, followed by the systematic introduction of the emerging devices employed for artificial sensory neurons. Furthermore, the implementations with different perceptual capabilities are briefly outlined and the key metrics and potential applications are also provided. Finally, we highlight the challenges and perspectives for the future development of artificial sensory neurons.

关键词： Artificial intelligence Emerging devices Artificial sensory neurons Spiking neural networks Neuromorphic sensing

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贵州高海拔地区玉米高产中的钾肥效应研究

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土壤通报 2002年第4期33卷 285-287页

作者：尹迪信李裕荣曹文才肖桂兰贵州省农业科学院农村发展中心贵州贵阳550006 贵州省威宁县农业局

在贵州高海拔地区采用玉米高产栽培措施 ,获得了 12 .2 1t/hm2 的玉米产量 ,超过当地平均产量 2 .7倍 ,钾肥配施可增产玉米 0 .83～ 2 .5 8t/hm2 ,增幅 8.81～ 2 6.80 % ,施钾肥产投比可达 5 .1～ 6.1。施钾肥后玉米的品质有明显的改善 ... 详细信息

在贵州高海拔地区采用玉米高产栽培措施 ,获得了 12 .2 1t/hm2 的玉米产量 ,超过当地平均产量 2 .7倍 ,钾肥配施可增产玉米 0 .83～ 2 .5 8t/hm2 ,增幅 8.81～ 2 6.80 % ,施钾肥产投比可达 5 .1～ 6.1。施钾肥后玉米的品质有明显的改善 ,试验认为N∶K2 O比为 10 0 :75～ 113 ,即施氮 (N ) 2 0 0kg/hm2 ,施钾 (K2 O) 15 0～ 2 2 5kg/hm2 为宜。

关键词：贵州高海拔地区玉米钾肥效应高产技术

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