Results 121 to 130 of about 1,026,823 (242)

CIMS环境下的使能器技术及其应用

open access: yes, 1994
本文阐述了CIMS中异构分布式数据库环境下基于并行客户/服务器结构的使能器技术、功能及其结构。并讨论了使能器技术在CIMS环境下的应用研究。
尹朝万, 郑怀远, 李贵
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Acceptance and Engagement in Artificial Intelligence–Supported Reading Among Primary School Learners of English as a Foreign Language

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Artificial intelligence (AI) is increasingly used to support language learning, yet little is known about how younger learners accept and engage with AI‐assisted reading. This study investigates primary school students’ acceptance of and engagement with an AI‐supported adaptive reading application for English as a Foreign Language (EFL ...
Mi Tang   +5 more
wiley   +1 more source

基于物理信息贝叶斯神经网络的光中子反应的研究

open access: yesHe jishu
基于贝叶斯神经网络预测了光中子反应的光中子反应道——(γ,n)和(γ,2n)的反应截面。优化器采用Torch.Adam,学习率设置为0.000 1。在训练过程中,结合物理信息引导有效增强了贝叶斯神经网络对数据结构的捕获能力。优化后的贝叶斯神经网络算法显著缩短了训练时间,单个模型的训练时间不超过7 min,为大量模型测试提供了保障。模型训练完成后,分析了B2、B3和B4模型(隐含层数量分别为2~4)的训练集预测结果,发现随着神经网络隐含层数的增加,模型对数据结构的捕捉能力逐渐增强 ...
孙 乾坤   +11 more
doaj   +1 more source

应用加卸载响应比预测地震

open access: yes, 2010
在前面我们知道了为什么可能运用加卸载响应比方法做地震预测,加卸载响应比方法不仅有坚实的理论基础,而且为实验室试验、数值计算以及过去的震例检测所证实。那么,在实际运用中,它真的有效吗?   尹祥础课题组将它用于地震中期预测已经取得了较好的效果,他们成功地预测过一些国内的地震,还成功地预测过一些国外的地震(美国,日本,土耳其等)。下面来看一些用加卸载响应比LURR预报地震成功的实例。   中国大陆:   早在1980年代后期,尹祥础课题组就用加卸载响应比方法对中外逾百个震例,从有感地震的4级~8 ...
尚嘉兰
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Exploring Chinese International Students’ Intercultural Competence in Australian University Classrooms: Challenges and Opportunities

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT With the increasing number of Chinese international students in Australian universities, intercultural competence has become a critical factor influencing their interactions with Australian tutors in university classroom settings. Existing research often examines students’ intercultural competence from a single‐method or single‐perspective ...
Jiangyu Han, Linda Tsung
wiley   +1 more source

硅基波导慢光器件及其应用

open access: yes, 2010
硅基波导慢光器件是构建全光智能互连和实时高速测控等下一代信息技术的关键器件,在光通信和光信息处理等诸多领域具有显著的技术优势和巨大的应用潜力.随着器件结构的不断创新以及微电子制造技术的不断升级换代,硅基波导慢光器件愈来愈走向实用化.文章介绍了慢光的基本原理,慨述了当前国内外硅基波导慢光器件的研究进展,着重分析了基于微环谐振腔的硅基波导慢光器件 ...
胡应涛   +4 more
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Assessing Argument Quality in L2 Argumentative Writing: Integrating Argument Elements and Intellectual Standards

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Many existing rubrics for L2 argumentative writing prioritize form‐based linguistic accuracy and complexity while insufficiently addressing substantive argumentative rigor and effectiveness. This limitation is further complicated by cross‐cultural variation in rhetorical conventions and educational practices, which challenge the direct ...
Zihan Xu, Peiyun Liu
wiley   +1 more source

多元统计方法在节肢动物群落分析中的应用

open access: yes, 2013
近年来有关节肢动物群落的研究报道较多,而传统的、简单的多样性指数分析远远不能满足对高通量群落数据的挖掘。采用多元统计方法可以较好地分析群落数据。其中,在研究某一处理的长期效应时,主响应曲线是一种经典的多元分析方法;而非度量多维尺度分析具有能处理较大量的数据且常能以低维排序图反映结果的优点,是一种具有广泛应用前景的排序技术。本文以Bt棉与非Bt棉不同比例混作棉田的节肢动物群落为例 ...
杨兵, 戈峰
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Unraveling Student Anxiety in EFL Classrooms in China: The Roles of the Classroom Environment and Control–Value Appraisals

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT In this study, control–value theory (CVT) was used to investigate how students’ perceptions of the classroom environment shape their anxiety in the context of English as a foreign language (EFL) learning through the mediating effects of control and intrinsic value appraisals.
Quan Qian, Xianhan Huang
wiley   +1 more source

一种用于丙烷氧化制丙烯醛膜反应器的制法和应用

open access: yes, 2004
一种用于丙烷部分氧化制丙烯醛的膜反应器,采用混合溶胶及AgBiVMoO络合粉体的方法制备,于AgBiVMoO在α-Al2O3膜管表面形成一薄层均匀连续的膜,膜管上的催化剂的负载量达到50-100mg,厚度大约为6-7um,具有白钨矿结构。该膜反应器在丙烷氧化制丙烯醛反应中应用时,一方面使反应气体丙烷在膜反应器中通过时都要与催化剂层接触,被活化发生反应,提高丙烷的转化率;另一方面,生成的丙烯醛能迅速离开催化剂层,避免深度氧化,提高丙烯醛的选择性 ...
杨维慎   +3 more
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