垂盆草对训练大鼠不同组织ATPase活性的影响

为探讨垂盆草对训练大鼠不同组织ATPase活性的影响,以SD雄性大鼠为实验对象,建立跑台运动训练模型.测定了大鼠力竭运动时间和Ca2 ,Mg2 -ATPase、Na ,K -ATPase活性.实验结果显示,垂盆草可以显著延长大鼠跑台运动力竭时间;使运动大鼠心脏、肝脏、肾脏、脑、股四头肌组织中Na ,K -ATPase 和Ca2 ,Mg2 -ATPase活性显著升高;结论认为,补充垂盆草冲剂可以提高大鼠不同组织ATPase活性,延长大鼠跑台运动力竭时间,提高大鼠的运动能力.     

中国农业文化遗产研究与保护实践的主要进展

中国农业文明历史悠久,农民们在长期生产实践过程中一直在寻求适应不同自然条件的生产方式,创造了灿烂的农业文化遗产。发端于20世纪初,以农业考古、农业历史、传统农业哲学及农业民俗学等为主要内容的农业遗产研究,为农业文化遗产研究奠定了基础。2005年以"青田稻鱼共生系统"被FAO列为首批GIAHS保护试点为标志的新时期农业文化遗产研究与保护实践探索,正体现出多学科合作、理论研究与实践探索并重、保护与发展协调的特征。本文从古籍整理与考古研究、概念与内涵研究、系统结构与作用机制研究、多功能性与生态系统服务研究等角度介绍了农业文化遗产的基础性研究进展,从动态保护途径研究、法律与政策保障研究和保护与发展实践探索等方面总结了近几年开展的工作与取得的成效。并在此基础上,提出了农业文化遗产研究与保护实践中应当注意的问题,包括:进一步丰富研究内容,重视典型传统生态农业模式的机理性、定量化研究;从多学科与跨学科的角度研究农业文化遗产;加快开展农业文化遗产的普查与价值挖掘工作;重视农业文化遗产的创新、发展及可持续利用;重视农业生物多样性与农业文化多样性两个方面的保护,在做好"两个保护"的前提下,促进地区的发展和农民生活水平的提高,并为现代农业发展提供支持;避免"原汁原味"的"冷冻式"保护和"大拆大建"的"破坏性"开发两种错误倾向;逐步建立农业文化遗产保护的多方参与机制,包括政府的主导作用,社区的积极参与,科技的有力支撑,企业的有效介入,媒体的跟踪宣传;使农业文化遗产地成为开展科学研究的平台,展示传统农业文明的窗口,生态-文化型农产品的生产基地,农业文化旅游的目的地。     

教师支持如何影响农村留守儿童学习适应——基于县域视角的调查研究

农村留守儿童的学习适应是农村留守儿童教育问题的核心议题。基于文献梳理,设计了农村留守儿童教师支持与学习适应的评价指标并提出研究假设,将问卷调研区域聚焦在县域层面,选择河南省X县为样本采集区域,采集调研数据,并进行数据分析,探寻教师支持对农村留守儿童学习适应的影响机制。研究发现:情绪性支持对工具性支持具有直接的正向影响效应;工具性支持对学习态度、学习成效具有直接的正向影响效应;学习态度对学习成效具有直接的正向影响效应。研究发现,从留守儿童学习适应改善的角度提出相应的教师支持策略:以鼓励、关爱及尊重为教师情绪性支持要点,助推工具性支持改善;以倾听、沟通与指导为工具性支持策略,改善学习态度及成效;以学习认知、表现及体验为关注点,提升留守改善儿童的学习成效。     

支持语境分析的机器翻译实现

机器翻译可以极大地帮助人们获取更多的新知识,机器翻译的质量,也是人们判断机器翻译工具的重要尺度.机器翻译质量的提高,离不开语境分析,如果忽略原语赖以产生的特定环境去进行翻译,往往会导致歧义现象产生.本文通过对几种翻译软件的翻译方式及翻译质量的比较,在软件实现中加入了语境分析与学习的功能,从另一个角度对机器翻译结果质量的提高方法进行了探讨.     

High-performance hardware architecture of elliptic curve cryptography processor over GF（2^163）

We propose a novel high-performance hardware architecture of processor for elliptic curve scalar multiplication based on the Lopez-Dahab algorithm over GF（2^163） in polynomial basis representation. The processor can do all the operations using an efficient modular arithmetic logic unit, which includes an addition unit, a square and a carefully designed multiplication unit. In the proposed architecture, multiplication, addition, and square can be performed in parallel by the decomposition of computation. The point addition and point doubling iteration operations can be performed in six multiplications by optimization and solution of data dependency. The implementation results based on Xilinx VirtexⅡ XC2V6000 FPGA show that the proposed design can do random elliptic curve scalar multiplication GF（2^163） in 34.11 μs, occupying 2821 registers and 13 376 LUTs.     

Role of recognition of prior learning for emerging economies: learning from a four sector pilot project in India

Recognition of prior learning (RPL) has increasingly been recognised as a useful way to certify experience and competencies gained in the workplace informally. Particularly pertinent is RPL in the context of international migration or in economies, where system reforms seek to overcome challenges related to access to formal training and qualifications. India has the goal to skill 300 million of its growing workforce and provide them access at various levels to certification and further learning opportunities. As a part of the overall system reforms, the Government of India, jointly with the ILO, pilot tested RPL in four sectors in collaboration with the industry and built the foundation for wider replication for another 26 growth sectors by undertaking a tracer study and evaluation. This paper can empirically establish that RPL has had a positive effect on income opportunities, occupational safety, social status and openness to further learning. The paper further discusses the challenges encountered during the implementation of the RPL projects before concluding with recommendations, highlighting the aspects required for quality RPL in an emerging economy. It closes by emphasising the importance of conducting tracer studies to determine impact and the need to provide complementary training during the RPL process.     

当前农户经济的发展困境及对策研究

随着我国农村经济的全面发展,家庭经营制度下的农户经济发生了根本性变化.农户经济在农村发展中发挥着重要作用,但是在现阶段其发展却受到了明显制约.本文主要从制度约束和资源约束两方面分析农户经济的发展困境:从制度创新、劳动力转移思路创新、组织创新、经营体制创新四个方面提出新形势下农户经济的发展对策.     

机床电气基本控制环节的组合探讨

机床电气控制线路可以将其分解成功能相对独立、组成结构相对独立的单元线路。通过对基本控制环节的分析，介绍了机床电气控制线路的组合方法以及需要注意的问题。     

Iris Localization Algorithm Based on Improved Generalized Symmetry Transform

Accuracy and fastness of iris localization are very important in automatic iris recognition. A new fast iris localization algorithm based on improved generalized symmetry transform (GST) was proposed by utilizing iris symmetry. GST was improved in three aspects: 1 ) A new distance weight function is defined. The new weight function, which is effective in iris localization, utilized the characteristic of irises that the iris is a circular object and it has one inner boundary and one outer boundary. 2) Each calculation of the symmetry measurement of a pair of symmetry points was performed by taking one point of a pair as the starting point of the transformation. This is the most important reason for fast iris localization, due to which, repetitious computation was largely excluded. 3) A new phase weight function was proposed to adjust GST to locate circle target much better because the inner part of iris is darker than the outer part. The edge map of iris image was acquired and GST was only implemented on the edge point, which decreased computation without loss of accuracy. The modification of distance weight function and phase weight function leads to the accuracy of localization, and other ideass peed up the localization. Experiments show that the average speed of new algorithm is about 7.0-8.5 times as high as traditional ones including integro-differential operator and Hough transform method.