全文获取类型
收费全文 | 10730篇 |
免费 | 220篇 |
国内免费 | 193篇 |
专业分类
电工技术 | 326篇 |
综合类 | 5755篇 |
化学工业 | 472篇 |
金属工艺 | 102篇 |
机械仪表 | 227篇 |
建筑科学 | 655篇 |
矿业工程 | 47篇 |
能源动力 | 12篇 |
轻工业 | 144篇 |
水利工程 | 142篇 |
石油天然气 | 29篇 |
武器工业 | 7篇 |
无线电 | 377篇 |
一般工业技术 | 203篇 |
冶金工业 | 1497篇 |
原子能技术 | 5篇 |
自动化技术 | 1143篇 |
出版年
2023年 | 30篇 |
2022年 | 102篇 |
2021年 | 142篇 |
2020年 | 140篇 |
2019年 | 92篇 |
2018年 | 81篇 |
2017年 | 84篇 |
2016年 | 155篇 |
2015年 | 247篇 |
2014年 | 770篇 |
2013年 | 638篇 |
2012年 | 802篇 |
2011年 | 951篇 |
2010年 | 789篇 |
2009年 | 821篇 |
2008年 | 720篇 |
2007年 | 742篇 |
2006年 | 694篇 |
2005年 | 598篇 |
2004年 | 542篇 |
2003年 | 439篇 |
2002年 | 380篇 |
2001年 | 253篇 |
2000年 | 166篇 |
1999年 | 115篇 |
1998年 | 48篇 |
1997年 | 47篇 |
1996年 | 42篇 |
1995年 | 32篇 |
1994年 | 32篇 |
1993年 | 17篇 |
1992年 | 14篇 |
1990年 | 18篇 |
1989年 | 13篇 |
1988年 | 14篇 |
1987年 | 14篇 |
1986年 | 13篇 |
1985年 | 13篇 |
1966年 | 13篇 |
1965年 | 17篇 |
1964年 | 26篇 |
1963年 | 19篇 |
1961年 | 15篇 |
1960年 | 13篇 |
1959年 | 21篇 |
1958年 | 20篇 |
1957年 | 15篇 |
1956年 | 22篇 |
1955年 | 22篇 |
1954年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Staub Adrian; Rayner Keith; Pollatsek Alexander; Hy?n? Jukka; Majewski Helen 《Canadian Metallurgical Quarterly》2007,33(6):1162
Readers' eye movements were monitored as they read sentences containing noun-noun compounds that varied in frequency (e.g., elevator mechanic, mountain lion). The left constituent of the compound was either plausible or implausible as a head noun at the point at which it appeared, whereas the compound as a whole was always plausible. When the head noun analysis of the left constituent was implausible, reading times on this word were inflated, beginning with the first fixation. This finding is consistent with previous demonstrations of very rapid effects of plausibility on eye movements. Compound frequency did not modulate the plausibility effect, and all disruption was resolved by the time readers' eyes moved to the next word. These findings suggest (contra Kennison, 2005) that the parser initially analyzes a singular noun as a head instead of a modifier. In addition, the findings confirm that the very rapid effect of plausibility on eye movements is not due to strategic factors, because in the present experiment, unlike in previous demonstrations, this effect appeared in sentences that were globally plausible. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
12.
利用Rabbit2000实现抄表数据在Internet网络的传输 总被引:1,自引:0,他引:1
介绍了Rabbit2000微处理器功能特性以及Dynamic C的软件开发环境,研究了基于Rabbit2000的嵌入式系统对网络和串口的编程技术;实现了抄表数据通过Internet网络的传输,介绍了PPP连接的建立以及利用UDP报文传输抄表数据的方法。 相似文献
13.
Thomas Thelin 《Empirical Software Engineering》2003,8(3):309-313
This thesis describes six empirical investigations of two techniques applied to software inspections, namely reading techniques and fault content estimation techniques. The first part of the thesis presents a series of experiments of a novel reading technique called usage-based reading. The second part investigates fault content estimation applied to the software inspection process. The estimation methods used are capture-recapture and curve fitting. 相似文献
14.
对中、美两国高校高水平运动队管理体制的探讨 总被引:15,自引:0,他引:15
彭中东 《武汉工业学院学报》2003,22(2):125-128
通过调查和查阅了大量的资料,对中、美两国的高校高水平运动队的管理体制进行了比较,旨在通过学习和借鉴将我国高校的高水平运动队管理体制不断的完善,提供一定的参考。 相似文献
15.
Four studies involving 573 female and 272 male college students demonstrated that multiple forms and measures of aggression were associated with high levels of sensation seeking, impulsivity, and a focus on the immediate consequences of behavior. Multiple regression analyses and structural equation models supported a theoretical model based on the general aggression model (C. A. Anderson & B. J. Bushman, 2002), positing that hostile cognition and negative affect mediate the relationships between the aforementioned individual differences and aggression. Sensation seeking also predicted a desire to engage in physical and verbal aggression. The final study demonstrated that relative to those scoring low, individuals scoring high on the consideration of future consequences are only less aggressive when aggression is likely to carry future costs. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
16.
Alcohol expectancy-challenge programs are effective in changing expectancies and reducing drinking in college men (J. Darker & M. S. Goldman. 1993. 1998); however, recent evidence suggests this protocol might not be effective for women (M. E. Dunn, C. Lau, & I. Y. Cruz, 2000). This study was designed to reevaluate the effectiveness of a social/sexual expectancy-challenge intervention in college women reporting moderate to heavy alcohol use. Forty-six undergraduate women were randomly assigned to the prevention or control condition. Participants reported alcohol expectancies at pre- and posttest and monitored their drinking patterns daily for 6 weeks. The program was effective in changing some expectancies but did not reduce drinking. This further confirms differences in the mechanisms by which expectancy-challenge programs function for men and women. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
17.
彭娜 《湖南冶金职业技术学院学报》2004,(4)
从语音、语义、结构3个方面分析了英语谚语的语言修辞特点,在此基础上,提出了等值、直译、意译、直意结合等4种汉译方法。另外,还提及了引申、对衬、格言、借用等4种具体翻译技巧。 相似文献
18.
Tokar David M.; Withrow Jason R.; Hall Rosalie J.; Moradi Bonnie 《Canadian Metallurgical Quarterly》2003,50(1):3
Structural equation modeling was used to test theoretically based models in which psychological separation and attachment security variables were related to career indecision and those relations were mediated through vocational self-concept crystallization. In contrast to previous studies, which have found either weak or no support for a relation between separation or attachment security variables and career indecision, results based on a sample of 350 college students indicated that some components of separation and attachment security did relate to career indecision in a theoretically supportable direction. Results also revealed that regardless of whether global or component career indecision measures were used, separation and attachment security effects on indecision were at least partially mediated through vocational self-concept crystallization. The strongest mediated relations were observed for the effects of attachment anxiety and maternal separation. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
19.
论科技论文英语摘要的表现形式 总被引:1,自引:0,他引:1
王定全 《武汉工业学院学报》2005,24(2):109-112
论述科技论文中英语摘要的文体风格、时态、语态和基本要求,并结合例句介绍了常用的表现形式,使之简洁、准确和流畅。 相似文献
20.
The main purpose of the study reported here was to investigate the relative importance of complexity of syllable structure and task differences in measuring phonological awareness in low-literacy adults. This study is a replication of a study with children conducted by S. A. Stahl and B. A. Murray (1994). Results indicated that the complexity of syllable structure did indeed better describe the construct of phonological awareness in low-literacy adults. At the same time, the authors also found some differences in the pattern of literacy acquisition for their Spanish adults in comparison with child literacy acquisition in English. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献