浅谈怎样提高中考数学二轮复习的效益

分析近几年的中考数学试卷很多考生后几道解答题失分现象较严重,通过有效的二轮复习,可以改善这种现象。     

新形势下我国高校教师职业倦怠研究

关于高校教师职业倦怠问题是学界关注已久的老话题,本文就职业倦怠的成因、表现及解决对策提出自己的一点看法。     

基于领域本体的Web页面信息抽取

由于当前信息抽取系统因知识库结构和内容的不同带来的搜索质量问题,将本体引入信息抽取中,有助于信息抽取系统对领域内的概念和概念之间的联系的统一认识,为用户提供更有价值的信息。提出了基于本体的文本信息抽取算法,通过本体元素描述抽取的文本信息。最后,利用此算法对某领域样本Web页面进行抽取并分析。实验表明性能有所提高。     

从学习者角度谈比较军事教育研究

比较军事教育作为古老而新兴的学科服务于军事教育改革与军队现代化建设。从对比较军事教育认识入手,结合军队实际,形成我军特色的比较军事教育研究,从学习者角度关注比较军事教育研究中的文化研究、方法论研究、理论体系建设和文献资料工作等内容。     

罗布麻主要成分的抗氧化作用研究

以维生素C（Vc）为对照,研究了罗布麻叶两种主要成分异槲皮苷和异白麻苷的抗氧化作用。结果表明异槲皮苷和异白麻苷抗DPPH作用优于Vc,可作为优秀的天然抗氧化物质,提示可将罗布麻开发成一种抗衰老的保健品。     

思想政治教育系统的研究回顾与反思

思想政治教育系统的现有研究成果主要集中于经验总结范式和理论建构范式两个维度,形成了系统工程论、生态系统论、学科理论系统论、社会系统论等代表性观点,呈现出鲜明研究特征。注重历史与逻辑分析统一、理论与实证研究并重、多学科与多范式研究共存、学术系统研究范式和行动系统思维方式同行是思想政治教育系统研究发展的新要求。     

金末统治者对汉族宰执的任用研究

汉族宰执在金末政治中起着重要的作用,金末统治者出于稳定统治的需要,对汉族宰执的任用采取了笼络和限制的双重政策,拟对金末统治者对汉族宰执的任用进行研究。     

缺席的中心 有力的在场——论《阿姆斯特丹》中女性的隐性力量

试图从认知语言学中概念整合和框架转移理论探析小说《阿姆斯特丹》中缺席的女主角莫莉和在场的女主角罗斯在小说中的隐性力量,指出因＂对莫莉的记忆＂这个类属空间,连通了克莱夫和弗农这两个输入空间的矛盾,二者矛盾的整合最终催生了新的意义：死亡。所以,莫莉是小说中两位男主人公克莱夫和弗农之间故事展开的中心和悲剧的根源;而另一在场女主角罗斯则用其曼妙的语言赢得其丈夫与弗农之间的争斗,加速了弗农和克莱夫死亡悲剧的发生。这些让读者们意识到小说中女性人物的隐性力量。     

A novel non-iterative shape method for estimating the decay time constant of the finger photoplethysmographic pulse

The photoplethysmogram (PPG) of a pulse wave, similar in appearance to the arterial blood pressure (ABP) waveform, contains rich information about the cardiovascular system. The decay time constant RC, equal to the product of peripheral resistance R and total arterial compliance C, is a meaningful cardiovascular model parameter in vascular assessment. Using or ameliorating the existing ABP methods does not achieve a satisfactory estimation of RC from the PPG volume pulse (VRC). Thus, a novel non-iterative shape method (NSM) of evaluating VRC is introduced in this paper. The mathematic expression between a novel, readily available morphological parameter called the area difference ratio (ADR) and VRC was established. As it was difficult to calculate VRC from the complicated expression analytically, we recommend estimating it using a piecewise linear interpolation criterion. Also, since the effect of the PPG magnitude is eliminated in the calculation of ADR, precaliberation or normalization is dispensable in the NSM. Results of human experiments indicated that the NSM was computationally efficient, and the simulation experiments confirmed that the NSM was theoretically available for ABP.     

An analysis of the educational value of low-fidelity anatomy models as external representations

Although high-fidelity digital models of human anatomy based on actual cross-sectional images of the human body have been developed, reports on the use of physical models in anatomy teaching continue to appear. This article aims to examine the common features shared by these physical models and analyze their educational value based on the literature on cognition, learning, and external representations. A literature search on these physical models in three popular anatomy journals published over a 10-year period from 2001 to 2010 found that all of them have low fidelity: they oftentimes do not closely resemble the regions of the human body they are representing. They include only a small number of the structures that exist in these regions of the human body and do not accurately represent the shape and surface details of these structures. However, these models strongly correspond to the human body in the spatial relationship of the represented structures, which is crucial to achieving their educational purpose of teaching three-dimensional comprehension and anatomical reasoning. The educational value of these models includes acting as memory aids, reducing cognitive overload, facilitating problem solving, and arousing students' enthusiasm and participation. Because these models often lack a close resemblance to the human body, their use in anatomy teaching should always be accompanied by adequate explanations to the students to establish the correspondence between the models and the parts of the human body they are representing.