检索结果-南通市图书馆

基于共创性学习理论的校外教育教师专业发展路径研究

在线全文

学校读者我要写书评

暂无评论

中国教育学刊 2021年第9期 85-89页

作者：麻来军王秀江浙江省教育科学研究院浙江杭州310012 中国儿童中心北京100035

校外教育教师队伍建设是校外教育质量提升的关键,但校外教育教师专业发展在理论研究和实践探索方面都未得到应有重视,存在着专业成长缺支持和情境、骨干教师发展缺关注和引领、专业研训缺规划和系统三个突出问题。在共创性学习理论的指... 详细信息

校外教育教师队伍建设是校外教育质量提升的关键,但校外教育教师专业发展在理论研究和实践探索方面都未得到应有重视,存在着专业成长缺支持和情境、骨干教师发展缺关注和引领、专业研训缺规划和系统三个突出问题。在共创性学习理论的指导下,不断推进教师联合体内部和联合体间的共创性研训活动,形成校外教育教师专业携同发展的共创性研训体系是破解这一难题的现实选择和有效路径。建立和优化以系统性问题、集体性问题和分布性问题为导向,工具创展、共同体创展和分工创展为指向的共创性研训实践路径,可实现校外教育教师专业携同发展。

关键词：共创性校外教育教师专业发展携同发展

“双高”建设校的群像特征与建设启示——基于浙江省的分析

在线全文

学校读者我要写书评

暂无评论

中国高教研究 2021年第2期 104-108页

作者：程江平麻来军浙江省教育科学研究院浙江杭州310012

准确把握"双高"建设校的特征,对当前优化高职教育创新发展路径具有重要的现实意义。以浙江省"双高"建设校为样本,在实地调研、收集数据,多维度实证分析的基础上,从认识、实践和成效三个维度,梳理出"双高"建设校具有全面推进与重点建设... 详细信息

准确把握"双高"建设校的特征,对当前优化高职教育创新发展路径具有重要的现实意义。以浙江省"双高"建设校为样本,在实地调研、收集数据,多维度实证分析的基础上,从认识、实践和成效三个维度,梳理出"双高"建设校具有全面推进与重点建设统一、发展理念与扎实行动一体、类型特征与学校特色彰显等共同特征。建设高水平高职学校要基于学校本身的客观条件,切实融入区域经济发展,提升高职院校对经济社会发展的贡献力和支撑力;要抓住高水平高职学校全面内涵建设的本质要求,规划长远,持续推进创新实践;要将品质发展作为高水平高职学校建设的核心追求,满足政府、企业、学校、学生等办学利益相关方的多元化需求。

关键词： “双高”建设校群像特征建设启示

Early Intervention on the Properties of Steel Slag at High Temperature by Modifier Compound with Tailings: A Feasible Way for Comprehensive Utilization of Solid Wastes

在线全文

学校读者我要写书评

暂无评论

矿物学报 2013年第S1期33卷 49-49页

作者： LIAN Fang ZHANG Zuoshun ma laijun Bater Sayin LIAO Hongqiang School of materials Science and Engineering University of Science and Technology Beijing Technical Center of Shougang Environment Protection Industry Department

Steel slag, a by-product of the steel production industry reaches 10%–15% of crude steel output (Motz and Geiseler, 2001). Their main application lies in the field of building materials due to some containing cementitious components, such as dicalcium silicate (C2S) and tricalcium silicate (C3S) (Waligora et al., 2010). However, blended cements with steelmaking slag show low early hydration activity, low compressive strength and bad durability because steel slag generates above 1600 ℃ with the tense and large grain size crystals, consisting of low content of C2S and C3S and high proportions of f-CaO and f-MgO compared with cement clinker.

关键词： steel slag early intervention high temperature modifiers tailings building materials

在线全文

学校读者我要写书评

暂无评论

校外教育活动类型与组织策略的再认识

中国校外教育 2021年第1期 24-32页

作者：麻来军沈艳浙江省教育科学研究院宁波市青少年宫

以专门校外教育说为理论基点,从“校外教育”和“活动教育”两个概念辨析入手,从政策、学理和实践三个研究视角着力,对校外教育活动内涵做了新界定,从机构、形式、内容和目的四维度提出校外教育活动具有开放性、活动性、综合性和教育性... 详细信息

以专门校外教育说为理论基点,从“校外教育”和“活动教育”两个概念辨析入手,从政策、学理和实践三个研究视角着力,对校外教育活动内涵做了新界定,从机构、形式、内容和目的四维度提出校外教育活动具有开放性、活动性、综合性和教育性的特征。基于对校外教育活动的新认知,明确提出以活动组织方式为依据,将校外教育活动划分为展示展演、比赛竞技、考察探究、拓展训练、交流访问、劳作实践、童玩游戏、讲座论坛和集会仪式九个类型,详细分析了校外教育活动呈现专业化、课程化和协同化发展趋势下,校外教育活动组织实施所坚持的创新性、开放性和自主性等一般策略和其独特属性。

关键词：校外教育活动类型策略

钢渣中游离氧化镁含量的测定及其减量控制措施

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

矿产综合利用 2017年第5期 70-75页

作者：马来君连芳王瀚霄张作顺北京科技大学材料科学与工程学院北京100083 北京生态岛科技有限公司工艺技术部北京102402

钢渣中存在的游离氧化镁易发生水化膨胀导致其安定性不良,限制了钢渣部分替代水泥制备胶凝材料的回收利用。本文优化了氯化铵-乙二醇滴定检测f-MgO的方法,研究表明以RO相和镁铁尖晶石相存在的氧化镁以及钢渣中的其他组分对f-MgO含量的... 详细信息

钢渣中存在的游离氧化镁易发生水化膨胀导致其安定性不良,限制了钢渣部分替代水泥制备胶凝材料的回收利用。本文优化了氯化铵-乙二醇滴定检测f-MgO的方法,研究表明以RO相和镁铁尖晶石相存在的氧化镁以及钢渣中的其他组分对f-MgO含量的检测干扰较小,测试数据准确度高,为钢渣安定性的判断提供了依据。同时,采用以铁尾矿和石灰石组成的改性剂对转炉钢渣进行改性,经1350℃高温改性和水冷处理后,其中f-MgO含量可由2.02%降低至0.89%,降幅达55.94%。高温改性可以显著降低游离氧化镁的含量,有助于改善钢渣安定性。

关键词：钢渣安定性游离氧化镁滴定高温改性

在线全文

学校读者我要写书评

暂无评论

活化赤泥基胶凝材料的抗冻融性能研究

硅酸盐通报 2024年第3期43卷 965-976页

作者：李子超朱俊阁乐红志马来君赵浩宇钟佳意山东理工大学材料科学与工程学院淄博255049

赤泥资源化利用对氧化铝行业可持续发展和环境保护具有重要意义。本文以赤泥和热活化赤泥为主要原料与钢渣等多种固废协同制备赤泥基胶凝材料,并对其抗冻融性能进行了研究。分别对养护14和28 d的胶凝材料试样进行冻融试验,用万能试验机... 详细信息

赤泥资源化利用对氧化铝行业可持续发展和环境保护具有重要意义。本文以赤泥和热活化赤泥为主要原料与钢渣等多种固废协同制备赤泥基胶凝材料,并对其抗冻融性能进行了研究。分别对养护14和28 d的胶凝材料试样进行冻融试验,用万能试验机、XRD、SEM、工业CT等检测方法对试样冻融前后的强度、物相、显微结构、孔隙率等进行表征,并对冻融损伤机理进行了探究。结果表明,赤泥基胶凝材料冻融前后的质量损失、强度损失、显微结构差异显著。其中,赤泥-普通硅酸盐水泥胶凝材料较其他赤泥基胶凝材料的抗冻性能优异,其养护14 d试件冻融前后的质量损失和强度损失分别为23.68%和50.75%;用热活化赤泥制备的赤泥-钢渣胶凝材料冻融后的质量损失率较冻融前降低了16.30%。

关键词：冻融损伤活化赤泥钢渣水泥胶凝材料

Preparation and Arc Erosion Characteristics of Ultrafine Crystalline CuCr50 Alloy by ma-SPS

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(materials Science) 2016年第5期31卷 1081-1085页

作者：史昆玉薛丽红 YAN Youwei ZHAO laijun School of Mechanical Electrical Engineering Wuhan Institute of Technology Wuhan 430073 China State Key Laboratory of materials Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan 430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China

The ultrafine crystalline CuCr50（Cr 50 wt%） alloys were fabricated by a combination of mechanical alloying and spark plasma sintering process. The effects of milling time on crystallite size and solid solubility of the CuCr50 composite powders were investigated. The results showed that crystallite size of powders decreases gradually and solid solubility of Cr in Cu was extended with increasing milling time. The minimal crystallite size about 10 nm and the maximum solid solubility about 8.4 at%（i e, 7 wt%） were obtained at 60 h. The microstructure of ultrafine crystalline CuCr50 alloy was analyzed by SEM and TEM, which contains two kinds of size scale Cr particles of 2 μm and 50-150 nm, distributing homogeneously in matrix, respectively. The arc erosion characteristics of ultrafine crystalline CuCr50 alloy were investigated by the vacuum contact simulation test device in low D.C. voltage and low current（24 V/10 A）. A commercial microcrystalline CuCr50 alloy was also investigated for comparison. Experiments indicate that the cathode mass loss of ultrafine crystalline CuCr50 contact material is higher than that of microcrystalline CuCr50 material, but its eroded surface morphology by the arc is uniform without obvious erosion pits. While the surface of microcrystalline CuCr50 contact is seriously eroded in local area by the arc, an obvious erosion pit occurred in the core part. Therefore, the ability of arc erosion resistance of ultrafine crystalline CuCr50 alloy is improved compared to that of microcrystalline CuCr50 material.

关键词： mechanical alloying spark plasma sintering ultrafine crystalline CuCr50 alloys arc erosion characteristics

Phase engineering in NaNbO_(3) antiferroelectrics for high energystorage density

在线全文

学校读者我要写书评

暂无评论

Journal of materiomics 2022年第4期8卷 753-762页

作者： Zhengu Chen Shuaifei mao Li ma Gengguang Luo Qin Feng Zhenyong Cen Fujita Toyohisa Xiuning Peng laijun Liu Huanfu Zhou Changzheng Hu Nengneng Luo School of Chemistry&Chemical Engineering Guangxi UniversityNanning530004China Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured materials School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning530004China Center on Nanoenergy Research School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning530004China School of Civil Engineering and Architecture Guangxi UniversityNanning530004China College of materials Science and Engineering Guilin University of TechnologyGuilin541004China

The NaNbO_(3) antiferroelectrics have been considered as a potential candidate for dielectric capacitorsapplications. However, the high-electric-field-unstable antiferroelectric phase resulted in low energystorage density and efficiency. Herein, good energy storage properties were realized in (1-x)NaNbO_(3)- xNaTaO_(3) ceramics, by building a new phase boundary. As a result, a high recoverable energy density(Wrec) of 2.2 J/cm3 and efficiency (h) of 80.1% were achieved in 0.50NaNbO_(3)-0.50NaTaO_(3) ceramic at300 kV/cm. The excellent energy storage performance originates from an antiferroelectric-paraelectricphase boundary with simultaneously high polarization and low hysteresis, by tailoring the ratio ofantiferroelectric and paraelectric phases. Moreover, the 0.50NaNbO_(3)-0.50NaTaO_(3) ceramic also exhibitedgood temperature and frequency stability, together with excellent charge-discharge performance. Theresults pave a good way of designing new NaNbO_(3)-based antiferroelectrics with good energy storageperformance.

关键词： NaNbO_(3)ceramics Antiferroelectrics Paraelectrics Energy storage density Dielectric capacitors

Neutron Diffraction Study on the magnetic Structure of 153EuMnO3-δ: One Way to Assess the magnetic Structure of EuMnO3-δ

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research and Application of materials Science 2020年第2期2卷 58-64页

作者： Xing ma Muhammad Asim FARID Jian LI Aimei YANG Guobao LI Fuhui LIAO laijun LIU Jianhua LIN Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871P.R.China College of materials Science and Engineering Guilin University of TechnologyGuilin 541004P.R.China Department of Chemistry Division of Science and TechnologyUniversity of Education Lahore 54770Pakistan

Owing to the strong neutron absorption of 151Eu,151Eu free 153EuMnO3-δhas been synthesized to collect the neutron diffraction data for analyzing the magnetic structure of EuMnO3-δ.The obtained neutron diffraction data of 153EuMnO3-δindicates that the magnetic diffraction peaks corresponding to cAAFM(canted A-type antiferromagnetic)phase can be observed,but the magnetic diffraction peaks corresponding to expected ICAFM(incommensurate antiferromagnetic)phase may be too weak to be observed.

关键词： magnetic structure Neutron diffraction 153EuMnO3 Perovskite