Results 41 to 50 of about 164,546 (209)

2kenize: Tying Subword Sequences for Chinese Script Conversion

open access: yes, 2020
Simplified Chinese to Traditional Chinese character conversion is a common preprocessing step in Chinese NLP. Despite this, current approaches have poor performance because they do not take into account that a simplified Chinese character can correspond ...
A, Pranav, Augenstein, Isabelle
core   +1 more source

Multi‐barcoding‐based species identification using a hierarchical attention network with staged curriculum learning

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye   +4 more
wiley   +1 more source

从土壤持水数据估算导水率方法的比较分析

open access: yesShuitu Baochi Xuebao, 2001
根据一些常用的土壤持水经验模型(VG模型、BC模型和CP模型)推求用于估算非饱和导水率函数的表达式,并采用田间实测的导水率数据与模拟估值进行对比.结果表明这些估算模型适宜用来描述细质地以上土壤的非饱和导水特性,且VG模型的估值效果要好于其他模型.当满足使用条件时,间接估值法可获得较好的模拟估值精度.
许迪 Mermoud A
doaj  

面向自然语言理解的多教师BERT模型蒸馏研究

open access: yes大数据
知识蒸馏是一种常用于解决BERT等深度预训练模型规模大、推断慢等问题的模型压缩方案。采用“多教师蒸馏”的方法,可以进一步提高学生模型的表现,而传统的对教师模型中间层采用的“一对一”强制指定的策略会导致大部分的中间特征被舍弃。提出了一种“单层对多层”的映射方式,解决了知识蒸馏时中间层无法对齐的问题,帮助学生模型掌握教师模型中间层中的语法、指代等知识。在GLUE中的若干数据集的实验表明,学生模型在保留了教师模型平均推断准确率的93.9%的同时,只占用了教师模型平均参数规模的41.5%。
石佳来, 郭卫斌
doaj   +1 more source

‘The Heart of the Matter’: Grandparent Childcare in Contemporary Chinese Families

open access: yesChildren &Society, EarlyView.
ABSTRACT Grandparent childcare is an international phenomenon, especially within families with children under 3 years old. China is no exception, as shown by a number of quantitative studies. Less clear is our understanding of the actual childcare arrangements involved and how these are negotiated and sustained through the intergenerational ...
Jiatong Ling   +2 more
wiley   +1 more source

大载荷电磁线圈发射器相似条件研究

open access: yesGaoya dianqi, 2014
建立了大载荷电磁线圈发射器的数学模型,结合相似原理推导了原型发射器与缩比模型各动态特性参数间的相似关系。根据实验条件确定了原型与缩比模型的相似比例系数并建立了EMCLHL缩比模型,通过仿真计算得到的结果证明了原型和缩比模型动态特性规律呈比例关系,且满足模型设计条件中各物理量的相似比例关系,相似模型条件是成立的。
王旻, 曹延杰, 邹本贵, 黄达
doaj  

Influence of reclamation on tide processes in Eastern China Seas [PDF]

open access: yes, 2016
摘要 本研究基于区域海洋模式(RegionalOceanModelingSystem)建立了东中国海二维潮汐水动力模型。利用该模型结果讨论了渤、黄、东海的水动力特征及苏北沿岸围填海对其水动力环境的影响。最后对南黄海无潮点的移动与韩国西岸潮振幅的变化的关系进行了探讨。 水动力模型结果与中国沿岸验潮站观测数据比较显示,M2、S2、K1、O1四个主要分潮振幅和迟角的均方根误差分别为10cm和33.2°、6.2cm和34.5°、8.8cm和29.4°、6.0cm和40.6°。比较结果表明 ...
丁萍
core  

Use of species’ responses to cryptic anthropogenic disturbances for monitoring biodiversity outcomes in tropical forests

open access: yesConservation Biology, EarlyView.
Abstract Measuring area‐based conservation outcomes in tropical forests is challenging due to cryptic human disturbances (e.g., hunting). As a result, comparative studies of management strategies providing quantitative outcomes remain scarce, especially in the Neotropics.
Lucy Perera‐Romero   +5 more
wiley   +1 more source

设平板加劲肋矩形钢管混凝土柱静载下ABAQUS本构模型的研究

open access: yesJianzhu Gangjiegou Jinzhan, 2021
对设平板加劲肋钢管混凝土柱静载下ABAQUS本构模型进行研究。首先对收集的设平板加劲肋钢管混凝土短柱轴压试验进行介绍;从混凝土本构模型、钢材本构模型、钢-混凝土界面黏结模型以及初始缺陷、残余应力的引入等方面入手进行分析;对比分析了Schneider模型、Saenz模型、韩林海模型及陶忠模型四种核心混凝土受压本构关系,在此基础上提出了考虑设肋钢管约束效应的核心混凝土单轴受压应力-应变本构关系;对钢材本构、钢-混凝土界面本构等模型进行了对比分析。通过采用本构模型进行了有限元仿真模拟 ...
李肖, 张元植
doaj  

Research on Innovations of Financial Arbitrage Models for Foreign-Related Enterprises in China [PDF]

open access: yes, 2016
摘要 本论文研究的是基于中国涉外企业实需的由与中国市场相关的汇率、利率及其衍生品工具组合而成的无风险和低风险套利模型的创新。论文将创新套利模型分3类:1)利率类套利模型;2)外汇远期类套利模型;3)外汇期权类套利模型。 这些模型均涉及跨市场套利,起到了连通弱关联市场的作用,可辅助提升金融市场效率,某些情况下还能成为市场定价工具。 在外贸行业生存愈发困难的大背景下,本论文所研究的课题对提高外贸企业盈利水平也有重要意义。Abstract The aim of this thesis is to ...
陈庚光
core  

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