全文获取类型
收费全文 | 35287篇 |
免费 | 2243篇 |
国内免费 | 1345篇 |
专业分类
电工技术 | 756篇 |
技术理论 | 1篇 |
综合类 | 9257篇 |
化学工业 | 3930篇 |
金属工艺 | 369篇 |
机械仪表 | 1409篇 |
建筑科学 | 4205篇 |
矿业工程 | 1347篇 |
能源动力 | 401篇 |
轻工业 | 545篇 |
水利工程 | 761篇 |
石油天然气 | 625篇 |
武器工业 | 59篇 |
无线电 | 4226篇 |
一般工业技术 | 1053篇 |
冶金工业 | 1078篇 |
原子能技术 | 20篇 |
自动化技术 | 8833篇 |
出版年
2024年 | 202篇 |
2023年 | 391篇 |
2022年 | 722篇 |
2021年 | 864篇 |
2020年 | 901篇 |
2019年 | 595篇 |
2018年 | 503篇 |
2017年 | 623篇 |
2016年 | 913篇 |
2015年 | 1241篇 |
2014年 | 3016篇 |
2013年 | 1999篇 |
2012年 | 3064篇 |
2011年 | 3449篇 |
2010年 | 3175篇 |
2009年 | 2785篇 |
2008年 | 2256篇 |
2007年 | 2524篇 |
2006年 | 2037篇 |
2005年 | 1721篇 |
2004年 | 1319篇 |
2003年 | 1158篇 |
2002年 | 919篇 |
2001年 | 733篇 |
2000年 | 568篇 |
1999年 | 356篇 |
1998年 | 198篇 |
1997年 | 137篇 |
1996年 | 110篇 |
1995年 | 81篇 |
1994年 | 52篇 |
1993年 | 47篇 |
1992年 | 26篇 |
1991年 | 36篇 |
1990年 | 17篇 |
1989年 | 13篇 |
1988年 | 13篇 |
1986年 | 11篇 |
1985年 | 10篇 |
1984年 | 4篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1972年 | 4篇 |
1966年 | 5篇 |
1962年 | 5篇 |
1959年 | 4篇 |
1957年 | 4篇 |
1955年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
张皓博 《重庆电力高等专科学校学报》2015,(3):5-6,17
以可编程控制器课程为例,介绍"任务驱动"教学法在教学过程中的具体应用,并探讨了实施过程中存在的问题与解决方法。 相似文献
3.
Many argue that digital technologies have the potential to enhance the teaching and learning of mathematics. However, the availability of technology is not sufficient to realise this potential. The study reported takes a detailed approach to investigate the utility of the particular offerings of the available technologies in the teaching and learning of a specific area of mathematics, functions. Sixteen affordances identified in the data are described. The complexity of the process involved in resolving a situation where particular affordances would be useful so as they are perceived and enacted is detailed. Finally, a grounded theory framework arising from the data analysis from this study that can be used to explain, predict and guide action in other digital environments is presented. 相似文献
4.
土木工程施工课程作为土木工程及工程管理专业的学科基础课和核心专业课程,在疫情防控期间"停课不停教""停课不停学"的要求下,通过线上平台进行授课。由于土木工程施工课程内容庞杂、综合性强、实践性强,且章节之间关联性较弱,探究既能使学生快速适应,又能保证教学质量的在线教学方法至关重要。以华南某高校土木工程施工课程为例,基于中国大学MOOC、建筑云课、腾讯课堂、QQ群等线上平台讲授教学内容,并运用问卷调查对课程线上教学效果进行评价。结果表明,线上教学为学生提供了丰富灵活的学习方式,显著提高了学生的自主学习能力,扩大了学生的知识面,达到了较好的学习效果。 相似文献
5.
An organization requires performing readiness-relevant activities to ensure successful implementation of an enterprise resource planning (ERP) system. This paper develops a novel approach to managing these interrelated activities to get ready for implementing an ERP system. The approach enables an organization to evaluate its ERP implementation readiness by assessing the degree to which it can achieve the interrelated readiness relevant activities using fuzzy cognitive maps. Based on the interrelationship degrees among the activities, the approach clusters the activities into manageable groups and prioritizes them. To help work out a readiness improvement plan, scenario analysis is conducted. 相似文献
6.
Load testing of applications is an important and costly activity for software provider companies. Classical solutions are very difficult to set up statically, and their cost is prohibitive in terms of both human and hardware resources. Virtualized cloud computing platforms provide new opportunities for stressing an application's scalability, by providing a large range of flexible and less expensive (pay‐per‐use model) computation units. On the basis of these advantages, load testing solutions could be provided on demand in the cloud. This paper describes a Benchmark‐as‐a‐Service solution that automatically scales the load injection platform and facilitates its setup according to load profiles. Our approach is based on: (i) virtualization of the benchmarking platform to create self‐scaling injectors; (ii) online calibration to characterize the injector's capacity and impact on the benched application; and (iii) a provisioning solution to appropriately scale the load injection platform ahead of time. We also report experiments on a benchmark illustrating the benefits of this system in terms of cost and resource reductions. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
7.
8.
试论绩效考核反馈--面谈 总被引:1,自引:0,他引:1
从剖析绩效考核反馈案例入手,分析和论述了绩效反馈面谈的目的、任务、内容、原则和技巧,指明了面谈是绩效考核反馈的黄金途径,提出了面谈的具体做法和要求。为企业人力资源管理者掌握绩效考核面谈及开展此项面谈工作提供一些参考和借鉴。 相似文献
9.
Kurjenniemi Janne Hämäläinen Seppo Ristaniemi Tapani 《Wireless Personal Communications》2003,27(4):337-351
In this article we consider the performance of the 3.84 Mcpstime-division duplex (TDD) mode of UTRA (Universal TerrestrialRadio Access) network. We emphasize two of the radio resourcemanagement algorithms, handover and uplink power control, whoserole in the overall system performance is studied extensively.First, a handover algorithm used in WCDMA (Wideband Code DivisionMultiple Access) standard is considered in a TDD-mode operation.This gives rise to a careful setting of different handoverparameters, and the evaluation of the effects to the systemperformance. Secondly, the specified uplink power controlalgorithm is considered. Since it is based on several user-mademeasurements which may involve both random and systematic errors acareful study about the suitability of the power control scheme iscarried out. 相似文献
10.
RENGong-chang LIUYong-hong ZHANGYou-yun 《国际设备工程与管理》2003,8(2):115-121
Product innovation,for a truly strong solution,needs deep knowledge.Based on this point,the authors draw a conclusion that patents are the main resource of deep technique knowledge.There are five levels of newly organized patents.The main results of the studies on patents are various tech-nique effects.The database of effects is organized and managed according to the form of function-effect structure. 相似文献