庄子忠孝观的学理解析

庄子关注人生,受儒家思想的影响,认识到忠孝在社会存在的必然性。庄子从名实和真假关系出发,批判了世俗错误的忠孝观,提出了"不用而寓诸庸"的践行忠孝的方法。庄子理想的忠孝观是"入于寥天一"。     

树脂复合减振钢板法向黏结强度与扩孔性能的试验研究

为数值模拟分析时有效地预测树脂复合减振钢板成形过程中的失效形式，设计了测量两表层钢板之间法向黏结强度的试验方法，获得了树脂复合减振钢板的法向黏结强度；并设计了测试树脂复合减振钢板扩孔成形性能的试验模具，获得了极限扩孔率.试验结果表明：树脂复合减振钢板和单层钢板的差异在于成形性能参数和工艺参数不同；要将复合减振钢板成功地应用于工业生产中，必须针对复合减振钢板的变形特点而设定新的失效评判标准，并开发新的检验手段.     

纳米磁种材料表面改性及其水吸附性能

中国的水资源状况日益严峻,因此迫切需要发展水处理新技术.与传统技术相比,超导磁分离技术具有低投资、低成本等优点.磁种是利用超导磁分离法处理含非磁性污染物废水的关键材料.本文采用化学共沉淀技术制备了Fe3O4纳米颗粒,利用等离子体有机聚合法和化学植入法对磁性纳米颗粒进行表面修饰,制备出麦秸杆纤维素自组装和聚醋酸乙烯酯(PVA)覆膜两种磁种材料.X射线衍射、透射电镜微观组织分析和红外光谱分析均表明具有吸附功能的活性基团和磁性颗粒能很好地结合.对改性后纳米磁种颗粒对水中阴阳离子和有机物的吸附性能的研究证明两类磁种材料均表现出90%以上的吸附率,可以满足超导磁分离水处理的要求.     

初等教育化学教学中提升学生能力的思考

要根据高等师范专科院校初等教育专业的培养目标,编写符合初等教育专业特点的化学教材.同时化学教学中应从扩大知识视野、提高实验操作技能、养成终身学习习惯等方面提升学生能力,从而培养全能型小学教师.     

浅谈国外项目测量仪器的保管及使用

文章对国外项目测量仪器的保管及使用进行了简单的分析,阐述了相关职责、保管及使用的方法、规章制度等方面内容,提出了相应观点用以提高国外项目测量仪器的保管及使用.     

中国IT业应对激烈竞争的竞争情报策略

以微软、摩托罗拉、IBM3个企业竞争情报工作实践和案例为基础,从竞争情报周期的视角,揭示和剖析了3个企业竞争情报战略的基本思路和主要做法,可为中国IT企业提供借鉴。     

关注气候 关注生命

2010年中国西南地区特大旱情牵动了全中国乃至全球人民的心，气候问题再一次成为科学界关注的焦点，善待地球，善待自然，就是善待人类自身。     

Temperature-induced fractionation of oxygen isotopes of diatom frustules and growth water in Lake Sihailongwan in Northeast China

Diatom oxygen isotopes have been widely applied in quantitative reconstruction of the paleoclimate and paleoenvironment, but have rarely been reported in China. In the present study, Lake Sihailongwan in Northeast China was selected for detailed investigation of oxygen isotopic fractionation between diatom frustules and lake water induced by growth temperature. This study involved a 2-year period of field monitoring of the lake water temperature at multiple depths and biweekly collections of traps for both sediment and water at shallow and bottom depths (7 and 49 m below the lake surface, respectively), diatom separation and purification of the trap sediments, and oxygen isotope measurement for diatom silica and lake water samples. The conditioned experiment conducted herein demonstrated that the laboratory device, methods and techniques used in this study were capable of generating reliable data for the typical oxygen isotope composition of diatom frustules. The data obtained revealed a prominent linear relationship between the oxygen isotope composition of the modern diatom and lake temperature during growth. The fractionation coefficient was about −0.185‰/°C−0.238‰/°C in the temperature range of 3.6–24°C, which is consistent with the observations from various aquatic environments and laboratory culture with different diatom taxa. These findings provide strong support for the dominant control of the growth temperature on the oxygen isotope fractionation between the diatom frustules and ambient water. A notable difference in the fractionation coefficient was observed between the surface and bottom diatom oxygen isotopes, suggesting that various depositional processes and taphonomic effects influenced the surface and bottom trap samples. Another factor leading to this difference may be that enrichment by evaporation and dilution by rainfall have a stronger influence on the surface. Overall, the results presented here demonstrate significant progress in evaluation of diatom oxygen isotopes in China and draw attention to the differences between surface and bottom diatom oxygen isotope compositions.     

基于工作过程的《建筑测量》实训教学实践

工作过程教学是职业技术教育中的一种重要的教学方式,有其自身的特点和必要性.该方法在<建筑测量>实训教学中的具体运用具有积极的指导意义.     

介绍几种新型电力设备线夹

传统铜铝过渡设备线夹，并沟线夹已经在电力工程中使用多年，它们在历史上发挥了积极的作用。但是随着电力事业的发展与科学技术的不断进步，也暴露出传统设备线夹的诸多缺点。本文通过介绍几种常用的新型电力设备线夹，可以为广大电力技术人员在工程实践中拓宽新的设备线夹选择范围提供一点帮助。