Effects of breakfast with different calorigenic amounts on blood glucose,insulin and glucagon levels     

黄素霞  傅运兴  王慧铭  GIANG Sylvia 《Journal of Zhejiang University. Science. B》2003,(6)

SUBJECTSANDMETHODSSubjectsTwenty four 2 1to 2 4yearsoldhealthymedi calstudentsenrolledinZhejiangUniversityCol legeofMedicinevolunteeredforthestudy .Theyconsistedof1 1malesand 1 3femalesweightsallwithinthenormalrangefortheirheightaccordingtoChinesenorms.Me…  相似文献   

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   

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   

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   

面向政府决策的知识挖掘     

吴鹏  苏新宁 《情报杂志》2006,25(9):45-47

在政府决策过程中,需要发掘蕴涵于政府智力资产中的隐性知识,形成决策智慧。将知识挖掘概念引入政府决策中,指出政府决策中需要挖掘的知识资产的类型,并分析知识挖掘对政府决策的作用,最后给出了政府决策过程中知识挖掘的流程。  相似文献   

用户赋能和服务创新对APP绩效的影响研究     

苏婉  李阳春  王天东  郝森森 《科研管理》2020,41(8):193-201

移动应用程序APP是移动互联网时代企业创造价值的重要渠道。尽管APP市场具有巨大的商业价值，但也出现了不少绩效较低的现象：互联网创业夭折、成交转化率低下、APP卸载率较高等等。研究APP的绩效问题有助于发现影响APP绩效的关键因素，帮助企业找到提高APP绩效的新方法。本文从服务主导逻辑出发，识别出了影响APP绩效的两大关键策略--用户赋能和服务创新，论述了这两大策略对APP收入绩效的影响机理。本文使用自然观察法跟踪和分析中国（N=200）和美国（N=206）两个样本中的APP个体，发现两个样本产生出来的结果较为一致：APP若选择赋予用户更多的权力，让用户主导平台的价值创造活动，那么它的收入绩效往往比较好；企业如果较为注重服务创新，持续地为APP开发出新特征或新服务，APP的收入绩效一般较好。本研究也可以给APP企业带来实践上的启示：首先，企业应分析APP的定位和作用；其次，企业应重视用户在价值创造中的重要作用，还要意识到用户不仅仅是APP的接受者和使用者，还是生产者和价值创造者；再次，企业应按照APP的定位，再决定是否将价值创造的主导权赋予广大用户；最后，企业应当重视APP的服务创新，持续地推出新功能和新特征，为用户提供更加便捷、易用的服务。  相似文献