教育资源唯一标识方法的初步研究

随着教育资源库的不断建设,如何避免同一资源或等价资源被重复收入已经成为教育资源库建设的突出问题。为此,本文提出了教育资源唯一标识的概念,并指出教育资源的唯一标识应该在两个层次上进行,首先是二进制级别的唯一标识,表示教育资源文件的相关特征;其次是资源内容上的唯一标识,表示资源内容的相关特征。文中给出了这两种唯一标识生成算法的参考指南,并提出了非文本多媒体资源唯一标识方法的发展方向。     

语文综合性学习与学生的语文素养

长期以来,我们的语文教学处于一种相对封闭的状态,似乎课本是唯一的信息来源,教师是唯一的信息传递者,教室是唯一信息交流的场所,     

基于遍历序列重构二叉结构树的分析

针对如何由二叉树的遍历序列来唯一确定二叉树的问题,提出了用两种遍历序列唯一确定一棵二叉树的方法.理论分析证明,已知先序遍历和中序遍历或者已知后序遍历和中序遍历可以唯一确定一棵二叉树,但已知后序遍历和先序遍历就不能唯一确定了.文中还对用两种遍历序列唯一重构一棵二叉树算法进行了描述.     

小学数学的三个疑点

零为什么不能做除数? 在正整数范围内,和、积是唯一存在的,差、商如果存在,也是唯一的。因此,规定零不能做除数,应根据乘除法的反逆关系,从商不存在和商不唯一两个方面来说明。     

唯一确定Huffman编码的新方法

最优二叉树又称Huffman树,其编码源于一些应用中不同符号的相关频数,当两个结点的权值最小且相等时,将造成生成的最优二叉树“形态”不唯一,从而使得编码、译码不能唯一确定.针对Huffman编码此种缺陷,提出了一种唯一确定Huffman编码的新方法,使得字符的Huffman编码是唯一的.最后给出实例以证明此方法的实用性.     

唯一强clean三角矩阵环

称一个环R中的元素a是唯一强clean的,如果a可以唯一地表示成幂等元和可逆元的和且二者可交换.称环R是唯一强clean的,如果R中每一个元素都是唯一强clean元.研究了n×n阶三角矩阵环的唯一强clean性.设R为局部环,证明了环R上的任意n×n阶上三角矩阵环是唯一强clean的当且仅当R是唯一bleached的且...     

关于我们的地球：101个有趣的事实（8）

问：世界上唯一的赤道冰川在哪里？ 答：位于厄瓜多尔境内的科多伯西山上分布着世界上唯一的赤道冰川。     

语文与生活的“联姻”

《语文课程标准》指出:语文教学要联系现实生活,要充分利用现实生活中的语文教育资源。在新课改理念中,教材不是唯一的课程资源,教室不是唯一的学习场所,教师不是唯一的教育者。正如美国教育家华特·科勒涅所说:语文教学的外延等于生活。在     

The Only Girl in Town

你不是镇上唯一的女孩 我的朋友总是这样对我说 说你又不是镇上唯一的女孩 但在我心中你就是唯一     

写给喜禾的一封信

喜禾小友： 你是我交的唯一得“自闭症”的朋友,可能我也是你认识的唯一有“抑郁症”的叔叔。     

论建立求能欲概念和创新欲概念的必要性

对才能、智慧和新事物的需要和渴求是客观存在的。求能欲（益智兴趣）和创新欲（创造兴趣）在心理系统中已有准确的定位。求知欲、求能欲、创新欲之间是层次递进的相交关系。创新是时代的课题,创新能力可以培养也有必要培养。创造教育方兴未艾,培养创新欲的工作应贯穿教育的全过程。“求知欲”这个词不能直观、准确地反映求能欲和创新欲的客观现实,仅利用求知欲概念不便于指导和促进“激发求能欲和创新欲的工作”。故建立求能欲概念和创新欲概念很有必要。     

从党内生活的视角看党委议事决策机制的完善

完善党委议事和决策机制,对于营造党委内部乃至整个党内民主生活的良好氛围具有重要意义。完善党委议事和决策机制要以"明确职责权限,落实地方党组织全委会的应有地位和作用;强化规则意识,严格规范党委议事和决策的程序;完善表决机制,科学界定和设计表决的内容和形式;加强监督制约,建立健全党委议事和决策制度的督察机制;推进实践探索,适时规范党委换届后新体制下党委班子成员的工作关系"为思路。     

论早期基督教和犹太教分裂的必然性

文章试图探索基督教和犹太教分裂的原因,以便找到二教分裂的必然性。作者认为,由于古犹太教异化而产生的基督教是其自身矛盾积累的结果。希腊化和犹太人的离散为基督教的独立发展提供了一个有利的背景;教义的分歧是分离的必然原因;政治目标的分歧是分裂的又一重要原因;争夺教徒促使了二教共存的社会基础的分裂;而圣殿被毁和西门.巴.科克巴起义最终完成了二者的分离。     

Preparation of Glutaraldehyde Cross-Linked Chitosan Beads Under Microwave Irradiation and Properties of Urease Immobilized onto the Beads

The glutaraldehyde cross-linked chitosan beads were prepared under microwave irradiation and urease was immobilized onto the beads. The activity and the yield of enzyme activity of the immobilized urease were 10.83 U/g carrier and 47.7%, respectively. The optimum conditions of immobilization were 1% of glutaraldehyde volume fraction, 10 mg/g of urease/beads weight ratio, 24 h of the processing time and pH 6.5 of the reaction medium for immobilization. The properties of the immobilized urease were investigated and compared with those of the free enzyme. The optimum pH values were 6.5 and 7.0 for the immobilized and free urease, respectively. The optimum temperature was 60℃ for the free urease, while it shifted to 65 ℃ for the immobilized enzyme. The Michaelis constant Kr, was 9.1 mmol/L for the immobilized and 12.5 mmol/L for the free urease. The immobilized urease retained 40% of its initial enzyme activity even after 10 repeated uses. The immobilized urease stored at 4 ℃ retained 46% of its initial activity even after 35 d.     

Identifying and Nurturing Gifted Children in Israel

The article describes Israel’s approach to the education of gifted and talented children. It describes the programs for gifted and talented children in Israel and the process for selecting students for these programs. The method of selecting students for programs is consistent with the Ministry of Education’s definition of giftedness, the goals of the giftedness programs, and the characteristics of these programs. The selection method is affected by the standards required of the instruments as well as other constraints, such as the constraints on funding for this purpose.The author of this article is the director of the Szold Institute program for identifying gifted children. The project is funded by the Israeli Ministry of Education     

A systematic review of interventions for children presenting with dyscalculia in primary schools

The acquisition of numerical competency is regarded as imperative for quality of life and economic well-being. Many children have significant mathematical learning difficulties known as dyscalculia. The aim of this research was to systematically review the available literature for interventions with children presenting with dyscalculia in primary schools, in order to provide an evidence base of filtered information assessed for methodological rigour and coherence. The study evaluated literature from 2004 to 2014 that reported on interventions for primary school children presenting with dyscalculia. Specific databases were accessed to highlight literature for inclusion in the study. The studies were assessed at title, abstract and full text levels for quality based on the inclusion and exclusion criteria. The findings provide a base of effective interventions that can be used in the school setting for individual development with a holistic focus and present various methods of instruction for children presenting with dyscalculia.     

杜仲带芽茎段快速繁殖中的污染及控制

研究杜仲成年树带芽茎段的快速繁殖中出现的污染及控制.以4、5月份取材萌发率高,污染小.外植体最佳表面消毒方法为:3%H2O2浸泡20min后,0.1%HgCl2 数滴Tween80浸泡10min.培养基附加链霉素8万单位/L 山梨酸钾50mg/L抑制微生物生长.在培养10-15d受到污染时可浸泡于8万单位/L链霉素10min或0.1%HgCl25min除菌.     

Population Proportion of Explained Variance in Principal Component Analysis: A Note on Its Evaluation Via a Large-Sample Approach

A large-sample procedure for examining explained population variance in principal component analysis is discussed. The method yields interval estimates for the proportions of variance accounted for by the considered for retention principal components. The obtained confidence intervals can be used to make decisions about the number of selected components, based on their performance in studied populations. The approach can also be employed for ascertaining group similarity or differences in percentage explained variance by the considered principal components. The procedure is illustrated with 2 examples.     

多索茶碱冻干粉针的制备及质量控制

目的:制备多索茶碱冻干粉针并对其进行质量检查.方法:制备工艺采用脱炭、过滤、细菌内毒素检查和冷冻干燥,并对其有关物质和含量等项目进行了检测.结果:最佳处方为每100支用多索荼碱10.5 g,甘露醇30.0 g;本品在5%葡萄糖注射液和0.9%NaCl注射液中室温放王4 h稳定性良好;有关物质及多索荼碱含量符合规定.结论:本研究表明多索茶碱冻干粉针的制备工艺稳定,质量可控.     

贯通式全过程课程设计教学与质量管理体系

为了提升全过程设计教学质量,基于全过程桥梁设计课程实践提出了贯通式的全过程课程设计教学与质量管理体系。梳理全过程设计任务和要求,涵盖专业各方面知识内容,同时避免重复;落实贯通制指导方案,明确权责界限;建立新型的考核与评价体系,彰显公平;基于互联网技术建立全过程课程信息化教学管理系统。基于问卷调查对贯通式的教学与质量管理体系的实际实施效果进行了评价。结果显示:实施贯通式的全过程课程设计教学与质量管理体系的积极作用非常明显,学生对该管理体系的反馈较好。本次全过程桥梁设计课程教学与质量管理体系改革的实践经验可为同类院校的相关专业教学改革提供参考和借鉴。