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Exploring Variability in Sea Level at a Tide Gauge Station through Control Charts
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作者 H.Bâkiİz 《Journal of Environmental & Earth Sciences》 CAS 2024年第1期11-18,共8页
Monitoring temporal changes in sea level is important in assessing coastal risk.Sea level anomalies at a tide gauge station,if kinematically conceived,include systematic variations such as trend,acceleration,periodic ... Monitoring temporal changes in sea level is important in assessing coastal risk.Sea level anomalies at a tide gauge station,if kinematically conceived,include systematic variations such as trend,acceleration,periodic oscillations,and random disturbances.Among them,the non-stationary nature of the random sea level variations of known or unknown origin at coastal regions has been long recognized by the sea level community.This study proposes the analyses of subgroups of random residual statistics of a rigorously formulated kinematic model solution of tide gauge variations using X-bar and S control charts.The approach is demonstrated using Key West,Florida tide gauge records.The mean and standard errors of 5-year-long subgroups of the residuals revealed that sea level changes at this location have been progressively intensifying from 1913 to the present.Increasing oscillations in sea level at this locality may be attributed partly to the thermal expansion of seawater with increasing temperatures causing larger buoyancy-related sea level fluctuations as well as the intensification of atmospheric events including wind patterns and the impact of changes in inverted barometer effects that will alter coastal risk assessments for the future. 展开更多
关键词 Climate change sea level variance X-bar s control charts
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Comprehensive effects of traditional Chinese medicine treatment on heart failure and changes in B-type natriuretic peptide levels: A meta-analysis
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作者 Li-Li Xia Shu-Yun Yang +2 位作者 Jun-Yao Xu Han-Qing Chen Zhu-Yuan Fang 《World Journal of Clinical Cases》 SCIE 2024年第4期766-776,共11页
BACKGROUND Heart failure(HF),a common cardiovascular condition,is characterized by significant morbidity and mortality.While traditional Chinese medicine(TCM)is often used as a complementary approach in HF management,... BACKGROUND Heart failure(HF),a common cardiovascular condition,is characterized by significant morbidity and mortality.While traditional Chinese medicine(TCM)is often used as a complementary approach in HF management,systematic evalua-tions of its impact on clinical outcomes,TCM syndrome scores,and B-type natriuretic peptide(BNP)levels are lacking.This study fills this gap through a comprehensive analysis of randomized controlled trials(RCTs)focusing on TCM for HF treatment.It encompasses an assessment of methodological quality,a meta-analysis,and an evaluation of evidence quality based on established standards.The results offer crucial insights into the potential advantages and constraints of TCM in HF management.RCTs on TCM for HF treatment published since the establishment of the database were searched in four Chinese and English databases,including China National Knowledge Infrastructure,Wanfang,VIP Information Chinese Science and Technology Journal,and PubMed.Methodological quality was assessed for the included studies with the Cochrane risk-of-bias assessment tool,and the meta-analysis and publication bias assessment was performed with the RevMan5.3 software.Finally,the quality of evidence was rated according to the GRADE criteria.RESULTS A total of 1098 RCTs were initially retrieved.After screening,16 RCTs were finally included in our study,which were published between 2020 and 2023.These RCTs involved 1660 HF patients,including 832 in the TCM group[TCM combined with conventional Western medicine(CMW)treatment]and 828 in the CWM group(CWM treatment).The course of treatments varied from 1 wk to 3 months.TCM syndrome differentiation was analyzed in 11 of the included RCTs.In all included RCTs,outcome indicators included comprehensive clinical outcomes,TCM syndrome scores,and BNP levels.The meta-analysis results showed significant differences between the TCM and CWM groups in terms of comprehensive clinical outcomes[risk ratio=-0.54;95%confidence interval(CI)=-0.61,-0.47;P<0.00001],TCM syndrome scores[weighted mean difference(WMD)=-142.07;95%CI=-147.56,-136.57;P<0.00001],and BNP levels(WMD=-142.07;95%CI=-147.56,-136.57;P<0.00001).According to the GRADE criteria,RCTs where"TCM improves clinical comprehensive outcomes"were rated as low-quality evidence,and RCTs where"TCM reduces TCM syndrome scores"or"TCM decreases BNP levels"were rated as medium-quality evidence.CONCLUSION TCM combined with CWM treatment effectively improves comprehensive clinical outcomes and diminishes TCM syndrome scores and BNP levels in HF patients.Given the low and medium quality of the included RCTs,the application of these results should be cautious. 展开更多
关键词 Traditional Chinese medicine Heart failure Comprehensive clinical outcomes Traditional Chinese medicine syndrome score B-type natriuretic peptide level Meta-analysis©The Author(s)2024.Published by Baishideng Publishing Group Inc.
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从协同到求异:指向教师专业发展的U-S合作优化研究
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作者 汪明帅 杨扬 《教师发展研究》 2024年第2期83-90,共8页
U-S合作是教师专业发展的重要举措。审视U-S合作的历程可知,U-S合作致力于多方位促进教师专业发展,协同逐渐成为U-S合作促进教师专业发展的底层逻辑。随着合作的持续推进,这一底层逻辑在促进教师专业发展方面所潜在的矛盾也逐渐暴露出... U-S合作是教师专业发展的重要举措。审视U-S合作的历程可知,U-S合作致力于多方位促进教师专业发展,协同逐渐成为U-S合作促进教师专业发展的底层逻辑。随着合作的持续推进,这一底层逻辑在促进教师专业发展方面所潜在的矛盾也逐渐暴露出来。一方面,大学与中小学的文化差异阻碍了协同的深度发生;另一方面,为了实现大学与中小学的协同,双方不得不做出诸多的妥协,在妥协的语境下,中小学教师往往面临着主体性丧失的风险。与之相对,在求异这一核心理念的引领下,跨界学习旗帜鲜明地提出了“差异即资源”的主张,并通过互动场域的营造和互动系统的建构,为“差异即资源”提供了现实可能,也为优化U-S合作提供了新的思路。 展开更多
关键词 U-s合作 教师专业发展 协同 求异
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On the Reconstruction of Teachers’Role of Business English Reading Classroom Teaching Based on Literature Circle
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作者 HU Lijun 《Sino-US English Teaching》 2023年第3期90-96,共7页
Business English reading teaching under the mode of“literature circles”focuses on cultivating students’autonomy in reading,group cooperation,and the exchange of ideas among group members.In this teaching mode,teach... Business English reading teaching under the mode of“literature circles”focuses on cultivating students’autonomy in reading,group cooperation,and the exchange of ideas among group members.In this teaching mode,teachers are no longer the masters of the reading classroom,but the helpers,participants,and researchers in the process of students’reading.The reconstruction of teachers’role can promote the benign development of relationship not only between teachers and students,but also between students and students,inject new impetus and vitality into the classroom,and improve students’reading literacy. 展开更多
关键词 business English reading literature circles teachers role RECONsTRUCTION
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Emotional Value Care to Promote Emotional Communication Between Teachers and Students Under the New Era of Education Mode
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作者 Yongdong Xiao 《Journal of Contemporary Educational Research》 2023年第1期7-12,共6页
With the development of the times and the progress of the society,the ancient education mode can no longer meet the requirements of the times.The concept of educating people must keep pace with the times.The way teach... With the development of the times and the progress of the society,the ancient education mode can no longer meet the requirements of the times.The concept of educating people must keep pace with the times.The way teachers and students get along is no longer like in ancient times,where teachers teach students to listen.In the new era,it is necessary to build a new model of interaction between teachers and students.If educators pay attention and come to understand students’psychology,listen to students’aspirations,tend to students’emotions,grow in love for education,and treat students from their hearts,they would be able to win the favor of students.Paying attention to students’emotional value can promote emotional communication between teachers and students.It is possible to adapt to the requirements of the new era for the construction of morality and ethics among teachers by caring for students’emotional value. 展开更多
关键词 teachers morality teachers style Emotional value Emotional communication
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Examining the Current State of Reflective Teaching Practices Among Newly Appointed Primary School Teachers
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作者 Yanshuang Xu 《Journal of Contemporary Educational Research》 2023年第12期258-262,共5页
This study focused on three newly appointed primary school teachers in City D as research subjects.Utilizing research methods such as interviews,text analysis,and observation,the findings revealed that these teachers ... This study focused on three newly appointed primary school teachers in City D as research subjects.Utilizing research methods such as interviews,text analysis,and observation,the findings revealed that these teachers exhibited a substantial grasp of teaching reflection.The predominant emphasis in their teaching reflection levels was observed at the technical reasonable reflection and practical action reflection stages.To enhance the reflection levels of these novice teachers,it is recommended to foster their professional ethics,institute a diverse training system,and enhance the school’s infrastructure and institutional support systems. 展开更多
关键词 Teaching reflection New primary school teachers Reflection level
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基于Swanson关怀理论的护理干预在早产儿母亲中的应用
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作者 黄丽玲 林梅 +5 位作者 黄芝蓉 许冬梅 黄婷 王嘉莹 马妮妮 李玉娟 《全科护理》 2024年第8期1459-1464,共6页
目的:探讨以Swanson关怀理论为框架的护理干预在早产儿母亲中的应用效果。方法:采取便利抽样法选取2022年1月-5月入住百色市某三级甲等医院新生儿重症监护室(NICU)治愈出院的40例早产儿母亲作为对照组,选取2022年6月-10月入住百色市某... 目的:探讨以Swanson关怀理论为框架的护理干预在早产儿母亲中的应用效果。方法:采取便利抽样法选取2022年1月-5月入住百色市某三级甲等医院新生儿重症监护室(NICU)治愈出院的40例早产儿母亲作为对照组,选取2022年6月-10月入住百色市某三级甲等医院NICU治愈出院的40例早产儿母亲作为试验组。对照组实施NICU常规护理,试验组在对照组干预的基础上实施基于Swanson关怀理论的护理干预,比较两组早产儿母亲干预前后疾病不确定感、希望水平、育儿胜任感得分情况。结果:干预后试验组早产儿母亲疾病不确定感得分明显低于对照组(P<0.001),希望水平得分明显高于对照组(P<0.001);出院时及出院1个月后试验组早产儿母亲育儿胜任感得分明显高于对照组(P<0.001)。结论:基于Swanson关怀理论的护理干预可有效降低早产儿母亲疾病不确定感水平,提高其希望水平,增强其育儿胜任感,有利于早产儿顺利从医院过渡至家庭。 展开更多
关键词 swanson关怀理论 早产儿母亲 疾病不确定感 希望水平 育儿胜任感量表
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乌什M_(S)7.1地震引起新55井、新46井水位水温同震响应分析
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作者 贾永斌 闫玮 +1 位作者 祖丽皮牙·艾尼瓦尔 汪成国 《内陆地震》 2024年第2期158-165,共8页
为研究乌什M_(S)7.1地震引起新55井、新46井水位不同程度的响应变化,对比分析观测井水位的同震响应特征,从含水层渗透性变化和地震波能量密度探讨了同震响应机理。结果表明:①伽师新55井和乌什新46井同震响应形态主要表现为井水位的大... 为研究乌什M_(S)7.1地震引起新55井、新46井水位不同程度的响应变化,对比分析观测井水位的同震响应特征,从含水层渗透性变化和地震波能量密度探讨了同震响应机理。结果表明:①伽师新55井和乌什新46井同震响应形态主要表现为井水位的大幅快速上升。②固体潮计算分析结果表明当地震波作用于新55井和新46井时,前者垂向水力交换增强,水平向水力交换减弱,含水层的水与井水进行交换,引起井水位同震上升变化;后者含水层渗透性增加,含水层水与井水进行交换,引起井水位同震上升变化。③地震能量密度计算结果显示新55井比新46井容易触发同震响应,这种差异性的响应可能与井含水层岩性有关。 展开更多
关键词 乌什M_(s)7.1地震 新55井 新46井 水位水温 同震响应
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The Effect of Life Skills Training on the Mental Health and Level of Resilience among Teachers of Normal Students and Teachers of Exceptional Students in Zahedan
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作者 Hossein Jenaabadi Bahareh Azizi Nejad +1 位作者 Rozita Mostafapour Rezvan Haghi 《Open Journal of Medical Psychology》 2015年第2期17-22,共6页
This is an experimental study conducted on two groups of control and experimental using pretestposttest design, applying psychological intervention on the study sample. The present study aimed to determine the effecti... This is an experimental study conducted on two groups of control and experimental using pretestposttest design, applying psychological intervention on the study sample. The present study aimed to determine the effectiveness of collective education life skills on mental health and resilience of teachers in Zahedan. The population of the study included all teachers at schools with normal students and teachers at schools with exceptional students in Zahedan, among which 60 teachers at normal schools and 20 teachers at exceptional schools were selected and placed in two groups of experimental and control, respectively. Initially, members of the experimental group were taught 10 basic life skills in 10 2-hour sessions. Mental health and resilience questionnaires were distributed and gathered before and after the training sessions. Results indicated the positive effect of life skills training on mental health of teachers at schools with normal students and teachers at schools with exceptional students, which meant that the more the life skills training to teachers at schools with normal students and teachers at schools with exceptional students, the lower their mental health scores would be. Results also indicated the positive effect of life skills training on resilience of teachers at schools with normal students and teachers at schools with exceptional students, which meant that the more the life skills training to teachers at schools with normal students and teachers at schools with exceptional students, the higher their resilience scores would be. 展开更多
关键词 Life skills Training MENTAL Health level of REsILIENCE teachers of Normal sTUDENTs teachers of Exceptional sTUDENTs
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“优师计划”背景下师范生U-G-S培养模式价值、问题及对策
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作者 尹婷婷 蒋丽 高鹏飞 《唐山师范学院学报》 2024年第3期106-109,共4页
从“优师计划”背景下师范生U-G-S培养模式价值分析入手,剖析“优师计划”背景下师范生U-G-S培养模式中地方政府、师范院校、中小学校、师范生四个基本要素各自存在问题,提出“四位一体”师范生U-G-S培养模式提升对策,以当地政府为主导... 从“优师计划”背景下师范生U-G-S培养模式价值分析入手,剖析“优师计划”背景下师范生U-G-S培养模式中地方政府、师范院校、中小学校、师范生四个基本要素各自存在问题,提出“四位一体”师范生U-G-S培养模式提升对策,以当地政府为主导、以师范院校为引领、以中小学校为核心、以师范生为主体,统筹各方培养资源和优势力量,激活多方利益主体意愿,助力乡村卓越教师的培养。 展开更多
关键词 “优师计划” 师范生 U-G-s培养模式
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In-doping collaboratively controlling back interface and bulk defects to achieve efficient flexible CZTSSe solar cells
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作者 Quanzhen Sun Yifan Li +6 位作者 Caixia Zhang Shunli Du Weihao Xie Jionghua Wu Qiao Zheng Hui Deng Shuying Cheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第2期10-17,I0002,共9页
Focusing on the low open circuit voltage(V_(OC))and fill factor(FF)in flexible Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)solar cells,indium(In)ions are introduced into the CZTSSe absorbers near Mo foils to modify the back interface... Focusing on the low open circuit voltage(V_(OC))and fill factor(FF)in flexible Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)solar cells,indium(In)ions are introduced into the CZTSSe absorbers near Mo foils to modify the back interface and passivate deep level defects in CZTSSe bulk concurrently for improving the performance of flexible device.The results show that In doping effectively inhibits the formation of secondary phase(Cu(S,Se)_(2))and VSndefects.Further studies demonstrate that the barrier height at the back interface is decreased and the deep level defects(Cu_(Sn)defects)in CZTSSe bulk are passivated.Moreover,the carrier concentration is increased and the V_(OC) deficit(V_(OC,def))is decreased significantly due to In doping.Finally,the flexible CZTSSe solar cell with 10.01%power conversion efficiency(PCE)has been obtained.The synergistic strategy of interface modification and bulk defects passivation through In incorporation provides a new thought for the fabrication of efficient flexible kesterite-based solar cells. 展开更多
关键词 Flexible solar cells Cu_(2)Znsn(s se)_(4) Back interface Deep level defects Barrier height
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The Impact of Comment Style on Learners’ Essay Revisions
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作者 CHEN Yang-tao 《Sino-US English Teaching》 2024年第2期73-78,共6页
This paper investigates how the type of written feedback provided by teachers affects learners’ ability to revise essays. A total of 120 participants participated in two rounds of essay composition and feedback deliv... This paper investigates how the type of written feedback provided by teachers affects learners’ ability to revise essays. A total of 120 participants participated in two rounds of essay composition and feedback delivery. The findings indicate that learners who receive comments in the form of questions are more prone to make revisions compared to those receiving statements or imperatives. These results hold significant implications for educators and the ways they utilize written feedback to enhance learners’ writing skills. 展开更多
关键词 teachers written feedback impact learners’essay revisions
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高质量的“U-G-I-S-C”教师教育模式构建研究
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作者 郑爽 王茹 房琛 《石家庄学院学报》 CAS 2024年第4期133-137,共5页
“U-G-I-S-C”教师教育模式能满足教师教育一体化发展、大学和中小学共同利益实现与优势发挥最大化、实现中国式现代化和教育强国建设培养卓越中小学教师的需要。为进一步提高我国教师教育质量,可从以下几方面优化“U-G-I-S-C”教师教... “U-G-I-S-C”教师教育模式能满足教师教育一体化发展、大学和中小学共同利益实现与优势发挥最大化、实现中国式现代化和教育强国建设培养卓越中小学教师的需要。为进一步提高我国教师教育质量,可从以下几方面优化“U-G-I-S-C”教师教育模式运行策略:明晰合作理念和共同利益目标,合作关系从松散走向共生;建立平等协商和高效工作机制,合作效果从单兵作战走向互惠共赢;共同发展教育作为爱的事业,从利益联合走向文化融合;增进技术赋能,促进教师培养从断裂式走向全程浸入式并基于循证的教师教育过程;完善保障机制,汇聚各方组织的巨大合力。 展开更多
关键词 高质量 “U-G-I-s-C” 教师教育模式
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基于S-XGBoost融合模型的中国进境快件风险水平评价研究
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作者 刘昌伟 谢晶 +2 位作者 邹廉青 梅云鹏 Kashif Abbass 《海关与经贸研究》 2024年第1期48-61,共14页
党的二十大报告指出要增强维护国家安全能力,推进国家安全体系和能力现代化,坚决维护国家安全和社会稳定。随着互联网产业的发展壮大,以进境快件为代表的跨境个人消费进入发展的快车道,随之而来的安全准入风险也越来越高。为深入推进智... 党的二十大报告指出要增强维护国家安全能力,推进国家安全体系和能力现代化,坚决维护国家安全和社会稳定。随着互联网产业的发展壮大,以进境快件为代表的跨境个人消费进入发展的快车道,随之而来的安全准入风险也越来越高。为深入推进智慧海关建设,进一步提升进境快件风险防控能力,文章分析了现行监管模式下进境快件存在的问题,运用XGBoost算法和SMOTE技术构建了S-XGBoost进境快件风险评估模型,并对历史通关数据进行了仿真布控和评估。研究结果表明本文提出的S-XGBoost算法模型具有较好的预测效果,风险预测准确率达到了99.06%,能够为海关工作人员提升进境快件布控有效率提出切实参考建议。 展开更多
关键词 数据挖掘 中国进境快件 s-XGBoost 风险水平
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用Level Set方法求解具有自由面的流动问题 被引量:11
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作者 袁德奎 陶建华 《力学学报》 EI CSCD 北大核心 2000年第3期264-271,共8页
为采用 Level Set方法来计算有自由水面的流动问题提出了一种方案.把自由水面视为水和空气的交界面,两种介质用统一的N-S方程求解,在自由面两侧分别采用各自的密度和粘性,并在自由面上给以适当的光滑;采用边界无法求解... 为采用 Level Set方法来计算有自由水面的流动问题提出了一种方案.把自由水面视为水和空气的交界面,两种介质用统一的N-S方程求解,在自由面两侧分别采用各自的密度和粘性,并在自由面上给以适当的光滑;采用边界无法求解双调和方程来确定距离函数;N-S方程用投影法求解.文中给出了二维水池水面振荡和瞬时溃坝问题的算例,可以看出用 Level Set方法求解有自由面流动问题是有效的. 展开更多
关键词 level sET方法 自由面 N-s方程 流动 水动力学
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用LEVEL SET方法计算溃坝波的传播过程 被引量:5
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作者 陶建华 谢伟松 《水利学报》 EI CSCD 北大核心 1999年第10期17-22,共6页
溃坝波的数值模拟在于正确地计算坝体溃决后上下游水面的迅速变化过程. 本文研究了近年发展起来的求解两种流体界面的Level Set 方法及其在具有自由表面的水动力学问题中的应用. 对不同底坡上的二维溃坝波进行了计算, 取得... 溃坝波的数值模拟在于正确地计算坝体溃决后上下游水面的迅速变化过程. 本文研究了近年发展起来的求解两种流体界面的Level Set 方法及其在具有自由表面的水动力学问题中的应用. 对不同底坡上的二维溃坝波进行了计算, 取得了和实验资料符合良好的结果. 展开更多
关键词 levelset方法 自由表面 溃坝波 Ns方程
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成效·局限·改革:“G-U-S”三位一体协同育师机制审思 被引量:2
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作者 徐红 《河北师范大学学报(教育科学版)》 北大核心 2023年第1期110-115,共6页
“G-U-S”三位一体协同育师机制是指,政府、高校、中小学(含幼儿园)三方各司其职,责任共担、协同培育教师的一种制度形式与工作方式。现有的三位一体协同育师机制尽管促进了教师培育成效提高、教师教育资源整合、区域教育均衡发展及教... “G-U-S”三位一体协同育师机制是指,政府、高校、中小学(含幼儿园)三方各司其职,责任共担、协同培育教师的一种制度形式与工作方式。现有的三位一体协同育师机制尽管促进了教师培育成效提高、教师教育资源整合、区域教育均衡发展及教师专业水平持续提升,但仍然存在相关决策主体单一、三元主体权责不明、培育方案不够成熟、协同培育管理不够协调等局限。为进一步提升“三位一体”协同育师机制的成效,理应构建具有一定行政职能的协同育师主体联盟,明晰“三位”主体各自的权责,完善协同育师培育方案,促进协同培育管理更加协调。 展开更多
关键词 G-U-s模式 U-G-s模式 三位一体协同育师机制 教师教育
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快速粒子level set方法的并行化
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作者 黄筱云 夏波 +1 位作者 程永舟 赵利平 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2018年第9期1478-1484,共7页
为缩短快速粒子level set(FPLS)方法追踪交界面的时间,分别运用区域分解和粒子分解算法来减少欧拉计算(level set对流方程和重新初始化)和拉格朗日计算(粒子时程积分和误差校正)的开销。算法采用OpenMP技术来实现,并通过Zalesak圆盘、... 为缩短快速粒子level set(FPLS)方法追踪交界面的时间,分别运用区域分解和粒子分解算法来减少欧拉计算(level set对流方程和重新初始化)和拉格朗日计算(粒子时程积分和误差校正)的开销。算法采用OpenMP技术来实现,并通过Zalesak圆盘、单涡以及三维变形等典型算例进行验证。计算结果表明:4线程下加速比能超过2,8线程下加速比也能接近4,并行化的FPLS方法具有良好的实用性和可扩展性。 展开更多
关键词 快速粒子level sET方法 并行 区域分解 粒子分解 OPENMP Zalesak圆盘 单涡
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On Teacher's Feedback from the Perspective of Communication
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作者 张芳 《英语广场(学术研究)》 2011年第Z4期115-118,共4页
Classroom interaction involves many aspects,among which teacher's feedback is an important element.This paper aimes at studying teacher's feedback from the perspective of communication.It first discusses the d... Classroom interaction involves many aspects,among which teacher's feedback is an important element.This paper aimes at studying teacher's feedback from the perspective of communication.It first discusses the definition of teacher's feedback and analyses the functions of teacher's feedback in the classroom interaction and then explores some strategies for effective feedback based on communication theory. 展开更多
关键词 teachers FEEDBACK CLAssROOM interaction VERBAL FEEDBACK communication sTRATEGIEs
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Vagueness in Teachers' Spoken Language
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作者 张爽 危鸣辉 《海外英语》 2011年第11X期145-147,共3页
Politeness symbolizes human civilization,and is one of conduct codes of human beings.As a social activity,language use is subject to this code as well.Pragmatic vagueness is a common phenomenon in spoken discourse.Fur... Politeness symbolizes human civilization,and is one of conduct codes of human beings.As a social activity,language use is subject to this code as well.Pragmatic vagueness is a common phenomenon in spoken discourse.Furthermore,it is an important strategy widely used in teachers' spoken language.Based on the politeness principle,this thesis explores the pragmatic vagueness by analyzing teachers' spoken discourse.Employing pragmatic vagueness in teacher's spoken language can smooth the relationship between teachers and students,and help teachers gain foremost effect on the education to their students. 展开更多
关键词 PRAGMATIC VAGUENEss teachers sPOKEN DIsCOURsE positive significance of VAGUENEss the POLITENEss principle POLITENEss strategy
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