全文获取类型
收费全文 | 20982篇 |
免费 | 1209篇 |
国内免费 | 717篇 |
专业分类
电工技术 | 1150篇 |
技术理论 | 4篇 |
综合类 | 6828篇 |
化学工业 | 1174篇 |
金属工艺 | 522篇 |
机械仪表 | 952篇 |
建筑科学 | 2169篇 |
矿业工程 | 223篇 |
能源动力 | 147篇 |
轻工业 | 451篇 |
水利工程 | 178篇 |
石油天然气 | 180篇 |
武器工业 | 45篇 |
无线电 | 1376篇 |
一般工业技术 | 867篇 |
冶金工业 | 1233篇 |
原子能技术 | 44篇 |
自动化技术 | 5365篇 |
出版年
2024年 | 126篇 |
2023年 | 279篇 |
2022年 | 446篇 |
2021年 | 677篇 |
2020年 | 569篇 |
2019年 | 432篇 |
2018年 | 349篇 |
2017年 | 401篇 |
2016年 | 518篇 |
2015年 | 714篇 |
2014年 | 1531篇 |
2013年 | 1195篇 |
2012年 | 1522篇 |
2011年 | 1728篇 |
2010年 | 1532篇 |
2009年 | 1526篇 |
2008年 | 1346篇 |
2007年 | 1257篇 |
2006年 | 1253篇 |
2005年 | 1065篇 |
2004年 | 935篇 |
2003年 | 927篇 |
2002年 | 767篇 |
2001年 | 443篇 |
2000年 | 410篇 |
1999年 | 245篇 |
1998年 | 115篇 |
1997年 | 65篇 |
1996年 | 46篇 |
1995年 | 45篇 |
1994年 | 37篇 |
1993年 | 22篇 |
1992年 | 25篇 |
1991年 | 21篇 |
1990年 | 21篇 |
1989年 | 18篇 |
1988年 | 33篇 |
1987年 | 25篇 |
1986年 | 15篇 |
1985年 | 19篇 |
1984年 | 17篇 |
1983年 | 12篇 |
1982年 | 17篇 |
1981年 | 9篇 |
1964年 | 9篇 |
1958年 | 9篇 |
1957年 | 19篇 |
1956年 | 8篇 |
1955年 | 19篇 |
1954年 | 11篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ABSTRACT The concept of digital game-based learning (DGBL) evolves rapidly together with technological enhancements of virtual reality (VR) and smart phones. However, the mental workload (MWL) that VR-training applications demand and motivational qualities originating from user experience (UX) should be identified in order to create effective and enjoyable training/learning challenges that fit with individual users’ capabilities. This study examined the effects of reality-based interaction (RBI) and VR on measures of student motivation and MWL, in a mental arithmetic game for secondary school pupils. In a randomised controlled trial with sixty school children, a mental arithmetic game was tested with three different interaction and two different presentation methods – VR RBI, VR head-mounted-display tapping and tablet flick-gesture. Results found a significant effect of RBI on MWL but no differences in enjoyment of training were found between VR-experience and tablet training-experience. In fact, adding the gaming-context to the mental arithmetic task created an enjoyable, motivating experience regardless of presentation or interaction-style. 相似文献
2.
3.
M. Ronen 《Journal of Computer Assisted Learning》1995,11(3):141-156
Abstract This article presents a study of a large scale incorporation of one data acquisitionsystem into physics teaching in Israel. By 1994 about 30% of the schools throughout the country used the V-scope, a 3-D multibody motion tracing system, in their lab programme. The views and reactions of post-training teachers, experienced teachers and students on various aspects of using the system are described, analysed and compared. 相似文献
4.
佘芳 《广东工业大学高等工程教育研究》2007,7(3):30-33
加强地方教育立法是我国整个立法工作不可或缺的一部分。文章以广东省为例,对广东省教育法规体系建设的现状和现存的问题进行剖析,并与北京、上海等省市的地方教育立法内容现状进行比较研究,提出广东省教育教育法规体系建设的重点及策略。 相似文献
5.
文章首先分析成人高等教育在构建终身教育体系中的地位和作用,指出成人高等教育是我国高等教育的重要组成部分,在实现大众化教育过程中起着重要且不可或缺的作用.然后,结合我国入世后全面参与全球化的大背景,在向市场经济转轨,经济和社会实现跨越式发展的关键时期,在普通高校不断扩招的形势下,论述我国成人高等教育的发展所面临的一系列挑战. 相似文献
6.
B. G. Clarke 《Canadian Metallurgical Quarterly》2007,133(2):107-115
This paper describes a module that was introduced into a civil engineering degree program with the help of professional engineers. The aim was to develop a bridge between the world of learning and professional practice by putting students in the role of consulting engineers working with industry to produce a feasible solution to a real inquiry from a client. The module is placed in context by comparing the goals of accredited civil engineering programs in the United Kingdom and America, by describing how it is linked to the degree program and by explaining the matrix developed to identify the skills the students needed to demonstrate their ability to practice as professional engineers. Details of the module are given with examples of student work and feedback. 相似文献
7.
Using meta-analysis, randomized experiments in education that either clearly did or clearly did not experience student attrition were examined for the baseline comparability of groups. Results from 35 studies suggested that after attrition, the observed measures of baseline comparability of groups did not differ more than would be expected given sampling error. The degree of either overall or differential attrition did not relate to baseline comparability, a finding that held under sensitivity analyses. Also, both overall and differential attrition rates were unrelated to posttest effect sizes. All of these analyses, however, lacked sufficient statistical power to detect small but potentially meaningful effects. Results suggest caution is warranted when applying quality scales and other blanket rules pertaining to attrition that are meant to either serve as inclusion-exclusion criteria or in scoring study quality. Much greater attention is needed to both the reporting of attrition in primary studies and to the development of conceptual and empirical models of the attrition process. These developments would aid further investigation of the relation between attrition and study outcomes. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
8.
A. H. Johnstone 《Journal of Computer Assisted Learning》1991,7(2):75-83
Abstract The difficulties of learning science are related to the nature of science itself and to the methods by which science is customarily taught without regard to what is known about children's learning. An information processing model is proposed to guide thinking and research in this area. 相似文献
9.
工业工程继续教育和高等教育自学考试方案研究 总被引:1,自引:0,他引:1
根据作者参与工业工程(IE)研究和学术活动的实践,阐述了如何把学习国外先进经验与中国国情相结合,并以机电制造工业为主要对象,研究和设计了IE专业继续教育和高等教育自学考试教学计划。同时说明了该计划的实施,为大批培养社会迫切需要的IE人才创造了条件,并对我国IE学科建设起到了积极的推动作用。 相似文献
10.
针对重视职业教育的重要性及迫切性,探讨了我国加入WTO之后职业教育新的使命和发展的方向,同时提出了新形势下对职业教育的要求和如何适应发展的措施。 相似文献