示意图提示条件下小学生数学问题解决的研究     

徐速 《数学教育学报》2006,15(2):64-66

学生对示意图提示条件普遍持肯定态度;学校教学水平影响学生非视觉化题目上的态度反应,而不影响视觉化题目上的态度反应.从整体上看,示意图提示条件能显著地促进学生的解题,但是这种促进作用受题目视觉化程度、学校教学水平的制约.在一定范围里,随着非视觉化题目难度增加示意图提示条件的作用在增强.  相似文献   

儿童文学中人文关怀的失落与回归     

兰芳 《教育探究》2006,(2)

儿童文学中的理性关怀和人文关怀二者是相辅相成的。但在儿童文学的发展过程中,这两种关怀严重失衡。儿童文学对理性的张扬,使作品充满了说教色彩,导致了儿童文学中人文精神的极度萎缩,新时期的改革开放带来文学观念的大变革,儿童文学创作也在反思中前进,一改过去单一、枯燥的说教面孔,在不违背理性教育的同时,给儿童以更多人文精神上的关怀。  相似文献   

Low-Temperature Selective Catalytic Reduction of NO with NH<Subscript>3</Subscript> over Fe–Ce–O<Subscript><Emphasis Type="Italic">x</Emphasis></Subscript> Catalysts     

Yan Sun  Ying Guo  Wei Su  Yajuan Wei 《天津大学学报(英文版)》2017,23(1):35-42

In this study, we used a simple impregnation method to prepare Fe–Ce–O _x catalysts and tested them regarding their low-temperature (200–300 °C) selective catalytic reduction (SCR) of NO using NH₃. We investigated the effects of Fe/Ce molar ratio, the gas hourly space velocity (GHSV), the stability and SO₂/H₂O resistance of the catalysts. The results showed that the FeCe(1:6)O _x (Ce/Fe molar ratio is 1:6) catalyst, which has some ordered parallel channels, exhibited good SCR performance. The FeCe(1:6)O _x catalyst had the highest NO conversion with an activity of 94–99% at temperatures between 200 and 300 °C at a space velocity of 28,800 h^?1. The NO conversion for the FeCe(1:6)O _x catalyst also reached 80–98% between 200 and 300 °C at a space velocity of 204,000 h^?1. In addition, the FeCe(1:6)O _x catalyst demonstrated good stability in a 10-h SCR reaction at 200–300 °C. Even in the presence of SO₂ and H₂O, the FeCe(1:6)O _x catalyst exhibited good SCR performance.  相似文献   

程度副词修饰名词结构探析   总被引：2，自引：0，他引：2  

胡苏 《连云港师范高等专科学校学报》2006,(2):31-34

程度副词修饰名词原本不是一个被语法学界完全认可的语法组合,然而在当代口语及书面语中,“程度副词 名词”组合却有越来越多的人使用。可见,“程度副词 名词”虽是一类很特殊的结构,但已具有相当程度的可接受性。与一般意义上的名词不同,进入这一结构中的名词需具有由具体指称向情状描述转化的潜在语义特征,这一类名词与程度副词的组合弥补了形容词语义表达上的问题,并由此引发了部分名词向名形兼类词的转变。  相似文献   

论连锁经营集团化     

陈元双  万兰芳 《广东广播电视大学学报》2002,11(4):67-70

连锁商业近几年在我国发展很快，但是我国的连锁经营由于发展时间太短，存在着起点低、基础差、规模小等不足，发展水平也不高。本文从构筑连锁经营集团化的必要性，连锁商业发展中存在的问题和机遇，实施连锁经营集团化的对策等方面论述，从而阐明我国连锁商业发展的策略选择是连锁经营集团化。  相似文献   

EFL teachers’ perceptions of English language policy at the elementary level in Taiwan     

Ya‐Chen Su 《Educational studies》2006,32(3):265-283

Due in large part to the trends towards economic globalization, English has become the most widely disseminated and ubiquitous international language. The purpose of the study was to investigate what Taiwan’s EFL teachers at the elementary level believe about the policy of English as a compulsory subject and how they perceive the benefits and obstacles of the policy’s implementation. Ten elementary English teachers in Tainan City and its suburban areas participated in this study. Data were collected through teachers’ interviews, classroom observation and document analysis. Results found that all ten teachers agreed with the policy for English as a compulsory subject at the elementary level. They observed both positive and negative sides of this top‐down policy. Classroom observation and interview data revealed that EFL teachers had to plan their English classes with the constraints on a large class of students with mixed levels of proficiency, limited teaching hours and resources. Parents’ expectations of and attitudes towards English learning also became an obstacle.  相似文献   

有机化合物的水解反应及研究进展   总被引：4，自引：0，他引：4  

苏秀芳  林强  徐静 《南宁师范高等专科学校学报》2006,23(2):101-104

该文对有机化合物的水解反应机理、应用及研究进展进行综述。  相似文献   

Improving the precision of the keyword-matching pornographic text filtering method using a hybrid model     

苏贵洋  李建华  马颖华  李生红 《浙江大学学报(A卷英文版)》2004,5(9):1106-1113

With the flooding of pornographic information on the Internet, how to keep people away from that offensive information is becoming one of the most important research areas in network information security. Some applications which can block or filter such information are used. Approaches in those systems can be roughly classified into two kinds:metadata based and content based. With the development of distributed technologies, content based filtering technologies will play a more and more important role in filtering systems. Keyword matching is a content based method used widely in harmful text filtering. Experiments to evaluate the recall and precision of the method showed that the precision of the method is not satisfactory, though the recall of the method is rather high. According to the results, a new pornographic text filtering model based on reconfirming is put forward. Experiments showed that the model is practical, has less loss of recall than the single keyword matching method, and has higher precision.  相似文献   

现代教育技术对体育教育的影响   总被引：1，自引：0，他引：1  

江甦  黄欣加 《扬州职业大学学报》2003,7(3):55-57

运用多媒体计算机技术，针对普通高校传统体育教学模式的缺陷，论述了多媒体技术在普通高校体育教学中的应用，对改革现有的教学方法，提高教学效果，促进教学改革的深化作了初步的探讨。  相似文献   

商务英语学习动机对比分析:个案研究   总被引：1，自引：0，他引：1  

何兰芳 《南平师专学报》2007,26(3):87-90

本文采用问卷调查和访谈相结合的形式,对180名英语专业和非英语专业二年级商务英语学习者的英语学习动机展开调查研究。研究结果表明受试者的商务英语学习动机水平和动机强度均属中等水平且学习动机存在专业和性别上的显著性差异。  相似文献