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Surveying on English Mobile Learning Among University Students: Current State and Influencing Factors

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Sino-US English Teaching 2024年第3期21卷 108-119页

作者： ZHU Haihua CHEN Yifan ren yanyan ZHI Yuying University of Shanghai for Science and Technology ShanghaiChina

Mobile learning integrates mobile technology with digital learning,offering flexible,personalized content and portable *** enables access to rich content and enhances learning ***,it has become mainstream to utilize mobile devices for English learning among university students’English *** current study aims to examine the current situation and influencing factors of university students’English mobile learning.98 university students in one university of Shanghai participated the study and the questionnaire was used to collect the *** results indicated that most university students already have electronic devices to support mobile *** factors,environmental factors,digital literacy,and technological capabilities are the main factors affecting university students’English mobile *** current study has implications for learners,teachers,and software *** should adjust their learning motivation,play an active role,and fully utilize the mobile platform to obtain resources and improve learning *** should incorporate the advantages of mobile teaching and promote categorized and tiered *** developers should add new functions on the basis of meeting the basic needs of learners and continuously innovate the mobile learning platform.

关键词： English learning mobile learning university students

Structure and Classification of Haemocytes in the Bivalve Mollusc Meretrix meretrix

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Journal of Ocean University of China 2006年第2期5卷 132-136页

作者： ZHANG yanyan ren Sulian WANG Dexiu SONG Weibo The Key Laboratory of Mariculture Ministry of Education Ocean University of China Qingdao 266003 P.R. China

Light and electron microscopic studies were carried out in order to characterize haemocytes in the bivalve mollusc Meretrix meretrix. According to nucleus and cytoplasm characters, four types of haemocytes were recognized： agranular haemocytes, lymphoid haemocyte, large granular and small granular haemocytes. Agranular hamocyte is the main cell type, accounting for 75%. It is agranular with rich organelles in cytoplasm, including mitochondria, golgi body and endoplasmic reticulum. Glycogen deposits were usually found in this cell type. The number of lymphoid haemocyte accounts for 1% - 2%. This cell type is agranular and shows a high ratio of nucleus to cytoplasm. A few organelles were found. High electrondense granules with diameters of 0.2 - 0.5μm and rich organelles were found in small granular haemocyte. The proportion of this cell type is about 15%. Rich granules of high electron-dense with diameters of 0.8- 2.4μm were found in large granular haemocyte. The proportion of this cell type is about 10%, and the quantity of organelles is the least.

关键词： Meretrix meretrix haemocytes structure classification

我国终身职业培训体系建设:政策演进与实践路径

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职教论坛 2019年第6期35卷 38-43页

作者：任岩岩广州番禺职业技术学院党委办公室(学院办公室)

为满足社会经济发展需要,推动职业培训工作发展,国家出台了一系列政策文件支持建设劳动者终身职业培训体系。建设劳动者终身职业培训体系是经济社会发展的内在要求,也是职业培训工作自身发展的迫切需要。培训体系建设在信息技术飞速发... 详细信息

为满足社会经济发展需要,推动职业培训工作发展,国家出台了一系列政策文件支持建设劳动者终身职业培训体系。建设劳动者终身职业培训体系是经济社会发展的内在要求,也是职业培训工作自身发展的迫切需要。培训体系建设在信息技术飞速发展的当下迎来了时代机遇和政策利好,只有积极抓住机遇才能突破瓶颈取得更好地发展。成熟完善的职业培训体系为社会所有成员参与继续教育培训提供了可能,但构建成熟完善的职业培训体系离不开政府、学校、行业企业各方的通力协作,同时需要以政策、课程、经费、师资这些核心要素作为保障。

关键词：政策供给职业培训体系终身教育

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建中末河东道政区调整与德宗藩镇政策

江汉论坛 2011年第5期 101-105页

作者：任艳艳武汉大学历史学院

建中末年河东道的政区调整是德宗即位以来削藩政策的集中体现。建中初年的削藩战争,河东三镇中尤以河东镇军功卓著,然在建中末的政区调整中,河东镇却未得尺寸之地;昭义镇军功逊于河东,却得以扩充;河中镇则被分割,增设晋慈镇。考察建中... 详细信息

建中末年河东道的政区调整是德宗即位以来削藩政策的集中体现。建中初年的削藩战争,河东三镇中尤以河东镇军功卓著,然在建中末的政区调整中,河东镇却未得尺寸之地;昭义镇军功逊于河东,却得以扩充;河中镇则被分割,增设晋慈镇。考察建中末河东道的政区布局调整,可以看出唐廷治理藩镇的策略,揭示唐廷与河东诸镇的微妙关系。

关键词：建中末年河东道政区调整藩镇政策

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精细化管理视角下饲料企业成本管理优化策略

中国饲料 2024年第2期 125-128页

作者：任彦燕郑州西亚斯学院管理学院河南郑州451100

在新形势下,传统成本管理逐渐凸显弊端,既无法提高企业经营管理水平,也无法保证成本控制力度,由此推动了精细化管理在成本管理中的应用。对饲料企业而言,精细化成本管理强调对生产管理全过程的成本控制,力求从细微处发现和解决成本超支... 详细信息

在新形势下,传统成本管理逐渐凸显弊端,既无法提高企业经营管理水平,也无法保证成本控制力度,由此推动了精细化管理在成本管理中的应用。对饲料企业而言,精细化成本管理强调对生产管理全过程的成本控制,力求从细微处发现和解决成本超支、资料浪费等问题。基于此,本文首先分析了饲料企业加强成本管理的重要意义,然后阐述了在成本管理中遇到的难题,最后有针对性地提出了饲料企业精细化成本管理的优化策略,以期帮助饲料企业实现降低成本,提高经济效益的目的。

关键词：精细化管理饲料企业成本管理策略

Spike N354 glycosylation augments SARS-CoV-2 fitness for human adaptation through structural plasticity

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National Science Review 2024年第7期11卷 80-94页

作者： Pan Liu Can Yue Bo Meng Tianhe Xiao Sijie Yang Shuo Liu Fanchong Jian Qianhui Zhu Yuanling Yu yanyan ren Peng Wang Yixin Li Jinyue Wang Xin Mao Fei Shao Youchun Wang Ravindra Kumar Gupta Yunlong Cao Xiangxi Wang CAS Key Laboratory of Infection and Immunity National Laboratory of MacromoleculesInstitute of BiophysicsChinese Academy of Sciences University of Chinese Academy of Sciences Cambridge Institute of Therapeutic Immunology&Infectious Disease(CITIID) University of Cambridge Biomedical Pioneering Innovation Center(BIOPIC) Peking University Changping Laboratory Joint Graduate Program of Peking-Tsinghua-NIBS Academy for Advanced Interdisciplinary Studies Peking University Peking-Tsinghua Center for Life Sciences Tsinghua University Chinese Academy of Medical Sciences&Peking Union Medical College

Selective pressures have given rise to a number of SARS-CoV-2 variants during the prolonged course of the COVID-19 pandemic. Recently evolved variants differ from ancestors in additional glycosylation within the spike protein receptor-binding domain(RBD). Details of how the acquisition of glycosylation impacts viral fitness and human adaptation are not clearly understood. Here, we dissected the role of N354-linked glycosylation, acquired by BA.2.86 sub-lineages, as a RBD conformational control element in attenuating viral infectivity. The reduced infectivity is recovered in the presence of heparin sulfate, which targets the‘N354 pocket’ to ease restrictions of conformational transition resulting in a ‘RBD-up’ state, thereby conferring an adjustable infectivity. Furthermore, N354 glycosylation improved spike cleavage and cell–cell fusion, and in particular escaped one subset of ADCC antibodies. Together with reduced immunogenicity in hybrid immunity background, these indicate a single spike amino acid glycosylation event provides selective advantage in humans through multiple mechanisms.

关键词： coronavirus glycosylation viral fitness adjustable infectivity co-factor usage viral evolution conformational modulator

构建数字图书馆信息资源全息存储平台可行性探讨

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图书馆 2006年第6期 94-96页

作者：任燕燕盐城师范学院图书馆江苏盐城224002

本文概述了全息存储的概念、优特点,分析了数字图书馆信息资源存储现状,提出了基于Client/serve结构大容量数据数字图书馆的构建,并介绍了几种全息存储的应用以及全息存储的发展前景。

关键词：数字图书馆信息资源全息存储

平行数据模型单位根的非参数检验方法——截面内误差项存在L阶自相关关系

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统计研究 2006年第10期23卷 28-30页

作者：任燕燕山东大学经济学院

By combining non-parameter Z test method for unit root test of time-series with IPS test method for panel data unit root test, we propose a new non-parameter unit root test method for panel *** method solves the unit root test’s problem that {ε_ it } is L-order *** random simulation method,we compare LL test with non-parameter unit root test for panel *** found that the non-parameter unit root test is superior to LL test in this case.

关键词：平行数据时间序列单位根的非参数Z检验方法平行数据单位根的LL检验方法平行数据模型单位根的IPS检验方法

基于氮杂环卡宾蓝光有机自由基的合成及其光学性质研究

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化学学报 2023年第7期81卷 735-740页

作者：任妍妍李欣韩英锋西北大学化学与材料科学学院西安710127

发光自由基因同时具有发光、导电、顺磁、可逆的氧化还原等特性,使其在有机光电领域具有广阔的应用前景.然而,目前已报道的发光自由基通常具有窄的最高占据轨道(HOMO)-单电子占据轨道(SOMO)能隙且分子结构单一,因此发光颜色主要集中在... 详细信息

发光自由基因同时具有发光、导电、顺磁、可逆的氧化还原等特性,使其在有机光电领域具有广阔的应用前景.然而,目前已报道的发光自由基通常具有窄的最高占据轨道(HOMO)-单电子占据轨道(SOMO)能隙且分子结构单一,因此发光颜色主要集中在橙色、红色等可见光的长波范围,难以获得具有蓝色发射的自由基.为进一步丰富发光自由基的种类、拓宽自由基的发光范围,本工作以氮杂环卡宾和9-(4-碘苯基)-9H-吡啶并[2,3-b]吲哚为前驱体通过钯催化的偶联反应得到了自由基前驱体[2a]I和[2b]I,进而通过单电子还原成功制备了两例发光自由基3a和3b.实验表明,自由基3a和3b在四氢呋喃溶液中具有蓝色的发射,其最大发射波长分别为450和428nm.此外,对比发现自由基的荧光发射能量高于对应吸收谱最大吸收波长处的能量,表现出明显的Anti-Kasha发射现象.本工作表明以氮杂环卡宾为骨架单元可有效构筑具有蓝色发射的自由基,为可控合成稳定的发光自由基提供了新的研究思路.

关键词：发光自由基氮杂环卡宾双线态蓝光高阶激发态