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析中学生数学学习困难的心理成因及转化对策

株洲师范高等专科学校学报 2005年第5期10卷 85-86页

作者：欧云华株洲师范高等专科学校数学与计算机科学系湖南株洲412007

中学生数学学习困难的心理成因主要是缺乏有效的学习动机，缺乏有效的元认知技能以及正确的认知结构,引导学生自我反思,调动非智力因素，改进教学方法，和谐师生关系是实用有效的转化对策。

关键词：数学学习心理成因对策

握力器运动处方对腕部损伤治疗过程的初步研究

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红河学院学报 2005年第3期3卷 53-56页

作者：欧云海红河学院体育系云南蒙自661100

　根据对北京体育大学教育学院24名同学的实验研究发现:握力器运动处方促进了腕部损伤的治疗.通过文献资料法、口头访问法、比较实验法,来研究腕损伤的运动疗法.该方法不但缩短了治疗时间,而且还提高了治愈率,给腕损伤恢复者提供了依据.

关键词：握力器处方腕部实验

A Novel CCA-NMF Whitening Method for Practical Machine Learning Based Underwater Direction of Arrival Estimation

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Journal of Beijing Institute of Technology 2024年第2期33卷 163-174页

作者： yun Wu Xinting Li Zhimin Cao School of Physics and Electronic Engineering Northeast Petroleum UniversityDaqing 163318China

Underwater direction of arrival(DOA)estimation has always been a very challenging theoretical and practical *** to the serious non-stationary,non-linear,and non-Gaussian characteristics,machine learning based DOA estimation methods trained on simulated Gaussian noised array data cannot be directly applied to actual underwater DOA estimation *** order to deal with this problem,environmental data with no target echoes can be employed to analyze the non-Gaussian ***,the obtained information about non-Gaussian components can be used to whiten the array *** on these considerations,a novel practical sonar array whitening method was ***,based on a weak assumption that the non-Gaussian components in adjacent patches with and without target echoes are almost the same,canonical cor-relation analysis(CCA)and non-negative matrix factorization(NMF)techniques are employed for whitening the array *** the whitened array data,machine learning based DOA estimation models trained on simulated Gaussian noised datasets can be used to perform underwater DOA estimation *** results illustrated that,using actual underwater datasets for testing with known machine learning based DOA estimation models,accurate and robust DOA estimation performance can be achieved by using the proposed whitening method in different underwater con-ditions.

关键词： direction of arrival(DOA) sonar array data underwater disturbance machine learn-ing canonical correlation analysis(CCA) non-negative matrix factorization(NMF)

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浅谈图书馆员如何进行情绪管理

科技情报开发与经济 2008年第13期18卷 28-29页

作者：欧云倩深圳图书馆广东深圳518036

通过对情绪、情绪管理含义的阐述,分析影响馆员情绪的各种因素,提出一些情绪管理的策略。

关键词：图书馆员情绪情绪管理

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公路工程填挖交界处的路基病害处治方案

工程建设与设计 2021年第8期 52-54页

作者：蔡云鸥梅州市梅县区伟康公路建设投资有限公司广东梅州514700

由于我国山区众多,大面积国土地处山区,受到地形地貌的影响,半填半挖路基是进行山区公路建设中不可避免的一种路基形式,能够充分利用挖方岩土,在生态保护方面有重要的作用。但是,由于在施工期间填挖路基搭接处理不到位,导致公路在运营... 详细信息

由于我国山区众多,大面积国土地处山区,受到地形地貌的影响,半填半挖路基是进行山区公路建设中不可避免的一种路基形式,能够充分利用挖方岩土,在生态保护方面有重要的作用。但是,由于在施工期间填挖路基搭接处理不到位,导致公路在运营期间容易成为病害重灾区,严重影响公路的质量以及使用寿命。论文通过对填挖交界路基病害的形成机理及影响因素进行研究,并进行分类,对其施工阶段以及运营阶段的处治方案进行了分析,为填挖交界路基病害的处置提供参考与建议。

关键词：交通运输公路路基填挖交界

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矩阵与分式递推数列的结合点

益阳师专学报 2001年第3期18卷 11-13页

作者：欧云华株洲师范高等专科学校数学系湖南株洲412007

以高等代数中矩阵为工具 ,解决分式递推数列问题。

关键词：高等代数矩阵分式递推数列结合点高师教育教学改革数学教学

石墨鳞片-碳纤维协同增强铜基复合材料的制备与热物理性能

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复合材料学报 2022年第2期39卷 759-768页

作者：黄焌晨缪国栋陈友明欧云郭世柏刘骞湖南科技大学机械设备健康维护湖南省重点实验室湘潭411201 湖南科技大学材料科学与工程学院湘潭411201

采用真空热压技术制备了石墨鳞片-碳纤维协同增强铜基复合材料,研究了碳纤维含量对复合材料的组织结构、抗弯强度与热导率的影响。结果表明,石墨鳞片-碳纤维/铜基复合材料界面结合良好;当碳纤维体积分数为0.5vol%~1.5vol%时,碳纤维能够... 详细信息

采用真空热压技术制备了石墨鳞片-碳纤维协同增强铜基复合材料,研究了碳纤维含量对复合材料的组织结构、抗弯强度与热导率的影响。结果表明,石墨鳞片-碳纤维/铜基复合材料界面结合良好;当碳纤维体积分数为0.5vol%~1.5vol%时,碳纤维能够均匀分散在基体中,并有效提升复合材料的抗弯强度。当碳纤维体积分数为1.5vol%时,抗弯强度达到最大值126 MPa,相比未添加碳纤维的复合材料提高了46%;但过量加入碳纤维(2vol%及以上)时,碳纤维出现团聚,使抗弯强度下降。碳纤维的加入会使复合材料的热导率小幅下降,复合材料的热导率从549 W/(m·K)降低到527 W/(m·K)。使用声子失配模型(Acoustic mismatch model,AMM)结合Digimat软件的MF模块对多相复合材料的热导率进行有效预测。

关键词：石墨/铜金属基复合材料抗弯强度模型分析真空热压法

Precise determination of the pole position of the exotic Z_(c)(3900)

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Science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 84-90页

作者： yun-Hua Chen Meng-Lin Du Feng-Kun Guo School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China School of Physics University of Electronic Science and Technology of ChinaChengdu 611731China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China

We perform a unified description of the experimental data of the π^(+)π^(-)and J/ψπ^(±)invariant mass spectra for e^(+)e^(-)→J/ψπ^(+)π^(-)and the D^(0)D^(*-)mass spectrum for e^(+)e^(-)→D^(0)D^(*-)π^(+)at e^(+)e^(-)center-of-mass energies 4.23 and 4.26 *** analysis takes into account open-charm meson loops that contain triangle singularities,the J/ψπ-DD^(*)coupled-channel interaction respecting unitarity,and the strong ππ-KK final state interaction using dispersion *** analysis leads to a precise determination of the Z_(c)(3900)pole with the pole mass and width(3880.7±1.7_(stat)±22.4_(syst))MeV and(35.9±1.4_(stat)±15.3_(syst))MeV,respectively,and hints at that the DD^(*)molecular and non-molecular components are of similar importance in the Z_(c)(3900)formation.

关键词： exotic hadrons dispersion relations final state interaction triangle singularity

Impact of Media Information on Social Response in Disasters:A Case Study of the Freezing‑Rain and Snowstorm Disasters in Southern China in 2008

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International Journal of Disaster Risk Science 2024年第1期15卷 73-87页

作者： Jia He Wenjing Duan Yuxuan Zhou yun Su College of Geographic Science and Tourism Xinjiang Normal UniversityUrumqi 830054China Xinjiang Laboratory of Lake Environment and Resources in Arid Zone Urumqi 830054China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing 100875China

Disaster information content is an objective mapping of disaster situations,social response,and public *** response to emergency is an important mechanism for implementing and guaranteeing emergency management of major natural hazard-related *** how disaster information content affects social response to emergencies is helpful for managing risk communication and efficient disaster *** on the 2008 freezing-rain and snowstorm disasters in southern China,this study used Python to extract 7,857 case-related media reports and applied natural language processing for text *** used three typical cases to identify and analyze disaster media report content and the relationship between these reports and the social response to the *** categories of disaster response-such as prewarning and forecasting,announcements by the authorities,and social mobilization-appeared in the disaster information in the media,along with disaster impact information,that is,real-time disaster *** response information and an appropriate amount of disaster impact information played important roles in prewarning,disaster relief,public opinion guidance,and social stability maintenance and can serve important functions in communicating with all stakeholders of emergency management,assisting or influencing emergency departments or individuals in decision making,and eliminating "information islands." Empathy caused the general public to become "disaster responders" through receiving *** and an excess of negative information may have a perverse amplification effect on public opinion and increase the unpredictability of the disaster situation and the risk of social crisis.

关键词： Emergency management Freezing-rain and snowstorm disasters Media reports on disasters Social response to emergencies China