小学生诗词楹联经典诵读开展方式的探究

诗词楹联是传统文化中的重要组成部分,读起来朗朗上口。诗词的历史非常悠久,从商周时期的《诗经》到唐诗宋词再到近代诗词,留给学生的是丰富的文化遗产。而楹联的历史也非常悠久,广义的楹联可以追溯到《诗经》时期,因为诗经中有很多对仗的语句,例如“昔我往矣,杨柳依依;今我来思,雨雪霏霏”等。狭义的楹联从五代后蜀主孟昶开始就已经非常普遍了。而到了明清时期,对对联的风俗非常盛行,对对联成为文人士大夫们重要的娱乐方式。可以说,诗词和楹联以其短小精悍的特点成为了古代流传最广的文学形式之一。因此,小学阶段朗诵诗词楹联是对传统文化的有力传承和发扬。     

“双创”视域下高校实践育人模式的思考

实践育人是高校深入实施素质教育的必然要求,是人才培养的重要途径。本文从“双创”的视域,分析当前社会对人才需求的现状和高校实践育人面临的困境,帮助教育者充分把握“双创”形势,并就完善高校实践育人机制提出合理建议。     

浅谈翻译教学在英语课堂中的应用

英语新课程标准提出要突出语言的实践性,强调语言技能的重要地位,翻译是一种综合运用语言技能的重要表现。当前我国英语教学对学生翻译技能的培养重视度较弱,本文分析了当前英语课堂中学生翻译水平的现状,并进一步提出将翻译教学应用于英语课堂中,提高学生的语用能力和语言技能。     

Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase

Rechargeable magnesium batteries have received extensive attention as the Mg anodes possess twice the volumetric capacity of their lithium counterparts and are dendrite-free. However, Mg anodes suffer from surface passivation film in most glyme-based conventional electrolytes, leading to irreversible plating/stripping behavior of Mg. Here we report a facile and safe method to obtain a modified Mg metal anode with a Sn-based artificial layer via ion-exchange and alloying reactions. In the artificial coating layer, Mg₂Sn alloy composites offer a channel for fast ion transport and insulating MgCl₂/SnCl₂ bestows the necessary potential gradient to prevent deposition on the surface. Significant improved ion conductivity of the solid electrolyte interfaces and decreased overpotential of Mg symmetric cells in Mg(TFSI)₂/DME electrolyte are obtained. The coated Mg anodes can sustain a stable plating/stripping process over 4000 cycles at a high current density of 6 mA cm⁻². This finding provides an avenue to facilitate fast ion diffusion kinetics of Mg metal anodes in conventional electrolytes.     

Experiments on Cu-isotope fractionation between chlorine-bearing fluid and silicate magma: implications for fluid exsolution and porphyry Cu deposits

Hydrothermal fluid is essential for transporting metals in the crust and mantle. To explore the potential of Cu isotopes as a tracer of hydrothermal-fluid activity, Cu-isotope fractionation factors between Cl-bearing aqueous fluids and silicate magmas (andesite, dacite, rhyolite dacite, rhyolite and haplogranite) were experimentally calibrated. Fluids containing 1.75–14 wt.% Cl were mixed together with rock powders in Au₉₅Cu₅ alloy capsules, which were equilibrated in cold-seal pressure vessels for 5–13 days at 800–850°C and 2 kbar. The elemental and Cu-isotopic compositions of the recovered aqueous fluid and solid phases were analyzed by (LA-) ICP–MS and multi-collector inductively coupled plasma mass spectrometry, respectively. Our experimental results show that the fluid phases are consistently enriched in heavy Cu isotope (⁶⁵Cu) relative to the coexisting silicates. The Cu-isotope fractionation factor (Δ⁶⁵Cu_FLUID-MELT) ranges from 0.08 ± 0.01‰ to 0.69 ± 0.02‰. The experimental results show that the Cu-isotopic fractionation factors between aqueous fluids and silicates strongly depend on the Cu speciation in the fluids (e.g. CuCl(H₂O), CuCl₂^– and CuCl₃²⁻) and silicate melts (CuO_1/2), suggesting that the exsolved fluids may have higher δ⁶⁵Cu than the residual magmas. Our results suggest the elevated δ⁶⁵Cu values in Cu-enriched rocks could be produced by addition of aqueous fluids exsolved from magmas. Together with previous studies on Cu isotopes in the brine and vapor phases of porphyry deposits, our results are helpful for better understanding Cu-mineralization processes.     

农户隐性占地行为与宅基地改革路径

在中国广大农村地区,不同程度地存在着“一户多宅”“一人一宅”“建新不拆旧”“少批多占”等违反相关法律的农户隐性占地行为,迟滞了新型城镇化建设和城乡统筹发展。本文以农户隐性占地行为为出发点,在宅基地功能属性变迁的研究视角下,探讨了农户隐性占地行为出现的根源以及宅基地制度相关试点改革的政策取向。首先,通过回顾宅基地计划分配制度与宅基地功能属性的变迁,发现现行的宅基地计划分配制度是建立于居住保障属性之上,一定程度上无法适应宅基地居住保障属性减弱以及资产属性彰显的社会现实。然后,本文分别从理论模型和现实情景的角度出发,来刻画分析农民如何通过宅基地的隐性占有行为来突破计划分配制度的限制。最后,通过整理部分宅基地改革试点县域的政策文本,发现目前的试点改革工作是从“维护宅基地的居住保障属性”与“适应宅基地资产属性彰显”这两个维度同时展开的,且前者明显受到试点县域的青睐和重视,而后者的改革则显得举步维艰。只有同时兼顾宅基地的居住保障属性和资产属性,才能实现对农户宅基地隐性占地行为的有效治理。     

1936—2018年环北极典型流域气温与降水时空变化

降水是环北极地区水资源的主要来源。定量分析气温与降水时空变化是深入理解环北极地区陆地水循环过程的基础。本文选取鄂毕河、叶尼塞河、勒拿河流域为对象,利用167个俄罗斯国家气象站点1936—2018年的气温与降水观测数据,结合线性趋势分析和Mann-Kendall突变点检验,揭示环北极典型流域气温与降水的时空变化特征。结果表明：①鄂毕河、叶尼塞河和勒拿河流域多年平均气温为0.06 ℃、-2.98 ℃、-7.41 ℃,年均增温速率分别为0.27 ℃/10 a,0.22 ℃/10 a,0.15 ℃/10 a。年内极端最低温（TNn）上升尤为明显,约为年均增温速率的1.3倍,春、冬季增温速率大于夏、秋两季;②鄂毕河、叶尼塞河和勒拿河流域多年平均降水量为496 mm、428 mm、369 mm;年降水量显著增加,其中叶尼塞河流域增速较慢（3.36 mm/10 a）,而鄂毕河（13.02 mm/10 a）和勒拿河（9.59 mm/10 a）流域增速较快,降水增加集中在春、秋、冬三季;③在空间上,增温较快的区域集中在西伯利亚高原和山地,最大增温速率达0.60 ℃/10 a,而平原地区普遍偏低;降水的空间差异大,西伯利亚南部高海拔地区（>1100 m）年降水量达1000 mm左右,北部低海拔地区普遍为300~ 600 mm。上述观测数据指示,环北极流域正在变暖变湿,且空间差异大,可能与“北极放大”及流域下垫面条件有关。     

2001-2004年《人大复印资料》转载的民族问题研究文章的统计分析

文章以《人大复印资料》2001-2004年间全文转载民族问题研究方面的文章为资料源,从栏目设置、作者所在省市、收录的期刊及引文中被引用的期刊等进行统计分析,为民族问题研究者提供一定的信息和有益的帮助.     

RSS技术在图书馆信息推送服务中的应用

介绍信息推送服务的概念和特点,以及RSS技术的基本原理,简单探讨了RSS信息推送服务在图书馆中的应用.     

大胆假设严谨求证——戴震治学方法论

戴震“必由字通其辞”“、凡立一义,必凭证据”的治学方法及“由辞以通其道”的学术路径与当时学风相统一,因而,独具特色。