文明传承的非稳定性特征——关于辽西考古文化演替规律的思考     

李永化 《辽宁师范大学学报(社会科学版)》2003,26(5):109-112

从辽西考古化的空间分布、聚落遗址的规模形态、生产工具的组合特点及演替规律中可以看出，该地区新石器时期以来化发展受生产经济形态转变的非稳定性特征的影响。环境条件特别是气候条件是影响辽西地区早期化发展的本质因素。气候温暖期，定居的农业化昌盛，气候寒冷期，只能维持低水平的简单畜牧经济。造成新石器时代一青铜时代该地区产生经济形态转变和化倒退的直接原因是5000aB．P．-4000aB．P．降温事件及铁器冷期寒冷气候的作用。环境因素的剧烈波动过程阻碍了该地区化与生产经济形态的正常演进与发展。  相似文献   

The imposition of government education policy initiatives and school enactment: uncovering the responses of school principals     

Khalid Arar  Yasar Kondakci  Alison Taysum 《Journal of educational administration and history》2019,51(4):295-300

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新建水泥混凝土路面断板原因分析   总被引：4，自引：0，他引：4  

黄先平 《怀化学院学报》2006,25(5):104-105

在夏季施工的新建水泥混凝土路面,施工过程中使用了一些不当的施工方法,造成干缩、冷缩裂缝并形成断板和连续断板·根据当时施工的几个环节具体分析了断板产生的原因,并提出以后工作应注意的事项,以防止类似的现象再次发生·  相似文献   

二阶线性微分方程的解法探讨     

宋苏罗 《南阳师范学院学报》2003,2(9):22-23

通过变量代换将微分方程a(x)y^n b(x)y′ c(x)y=d(x)化为二阶常系数线性微分方程，从而求得其解。  相似文献   

论情事变更原则     

孙胜玉  杨勇骏 《丹东师专学报》2003,25(2):42-44

情事变更原则是调整市场经济的一项重要法律原则，我国对情事变更原则的立法尚不完善，而现实生活和司法实践中存在并且确认情事变更原则。确立和完善情事变更法律制度有着重要意义，应从实体法和程序法以及立法解释和司法解释几个方面确立和完善情事变更法律制度。  相似文献   

改变头部位置对单杠屈身上动作质量的影响     

许鑫荣 《巢湖学院学报》2006,8(3):111-113,125

本文从多方面阐述了头部位置的改变,对单杠屈身上的影响,为学习正确的动作、提高动作的质量和教学效果提供科学依据。  相似文献   

Knowledge,education and research: Making common cause across communities of practice          下载免费PDF全文

Gemma Moss 《British Educational Research Journal》2016,42(6):927-944

This article considers how knowledge, education and research interact as the institutional structures that support them change. Many efforts at large‐scale education reform depend upon the proposition that what counts as useful knowledge can be easily defined, without reference to the specific contexts in which that knowledge will be set to work. Yet ?useful knowledge’ as it appears to policymakers does not always translate into ?useful knowledge’ from the perspective of practitioners. Distance and context matter. Based on studies of the development of literacy policy in England under successive governments, the paper assesses the dislocations and divisions of labour that characterise the contemporary knowledge landscape and asks how the research community can continue to act for the common good in an increasingly crowded and contested education field.  相似文献   

西安地区全新世环境变迁与土壤的形成演化     

周群英 《陕西教育学院学报》2004,20(3):107-111

根据对西安地区全新世黄土-古土壤覆盖序列和磁化率气候代用指标分析，揭示了全新世以来西安地区环境资源的变迁与土壤形成演化的过程。认为在全新世早期，气候比较温和干燥，风尘堆积速率降低，并有一定的生物风化成壤作用，土壤发育表现为边沉积边成壤；到了全新世中期，气候温暖湿润，沙尘暴很少发生，风尘堆积速率极低，植被覆盖度高，生物风化成壤作用达到最强，加上人类的耕作，形成了肥沃的褐土；到了3100多年前的全新世晚期，气候转为干冷，风尘堆积速率加强，环境资源恶化，土壤退化严重。  相似文献   

Components of Conceptual Ecologies   总被引：1，自引：0，他引：1  

Hyun Ju Park 《Research in Science Education》2007,37(2):217-237

The theory of conceptual change is criticized because it focuses only on supposed underlying logical structures and rational process processes, and lacks attention to affective aspects as well as motivational constructs in students’ learning science. This is a vast underestimation of the complexity and diversity of one’s change of conceptions. The notion of conceptual ecology provides a context for understanding individuals’ conceptual change learning, as it is the environment through which all information is interpreted. This research investigated how high school students’ statements, made in answering questions, reflect selected components of their conceptual ecologies. Data for this study was collected from six interviews in which seven students took part. The data also include the science teacher’s profiles of each student, the students’ personal journals, their assignments, and their examinations and answers in class. The analysis presented will here include only those components that were represented in the discourse of the seven high school students who were interviewed. When students were asked questions, there was evidence of the engagement of the various components of conceptual ecologies. These components include: epistemological commitments, metaphysical beliefs, the affective domain and emotional aspects, the nature of knowledge, the nature of learning, the nature of conceptions, and past experience. Evidence from this study suggests that these components might function as constraints to learning. This study contributes to the field by expanding our knowledge of the components of high school students’ conceptual ecologies through its definition of the categories and themes associated with those components. In examining across the range of components, the study illustrates the variety and sources of science conceptions within high school students’ conceptual ecologies.  相似文献   

概念隐喻研究综述     

陈文萃  曾燕波 《衡阳师范学院学报》2003,24(4):118-121

1980年莱考夫和约翰逊两人合著的《我们赖以生存的隐喻》一书，提出了一种迥然有别的隐喻知现——概念隐喻。从概念隐喻的理论、其所属范畴、哲学基础以及运用等方面对其内涵加以探讨，可以使人们进一步确信：隐喻作为一种认知现象，对人类思维方式、语言使用等方面的影响是极其广泛而深刻的。  相似文献