全文获取类型
收费全文 | 105篇 |
免费 | 14篇 |
国内免费 | 1篇 |
专业分类
化学 | 37篇 |
力学 | 1篇 |
数学 | 12篇 |
物理学 | 8篇 |
无线电 | 62篇 |
出版年
2024年 | 3篇 |
2023年 | 5篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 12篇 |
2019年 | 5篇 |
2018年 | 2篇 |
2017年 | 7篇 |
2016年 | 13篇 |
2015年 | 4篇 |
2014年 | 9篇 |
2013年 | 7篇 |
2012年 | 9篇 |
2011年 | 6篇 |
2010年 | 2篇 |
2008年 | 3篇 |
2007年 | 6篇 |
2006年 | 2篇 |
2004年 | 2篇 |
2002年 | 4篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1995年 | 2篇 |
1986年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
排序方式: 共有120条查询结果,搜索用时 265 毫秒
1.
An experiment was designed to determine whether normally sighted human subjects would be able to adapt to the handicapping effects of sudden deprivation of visual cues on horizontal plane sound localization. Two groups of sighted normal-hearing young adults participated. One group was allowed the benefit of sight. The other group was blindfolded. Measurements of accuracy and the time to respond were made daily over the course of five consecutive days, in a semi-reverberant sound proof booth that modeled listening in a small office. Sound localization was assessed using an array of eight speakers that surrounded the subject in space. Each day, one block of 120 trials was presented for each of three stimuli, two one-third octave noise bands, centred at 0.5 and 4 kHz, and broadband noise, to assess the utilization of interaural temporal difference cues, interaural level difference cues and binaural and spectral cues in combination. Blindfolded subjects were relatively less accurate than sighted subjects. Both groups showed gains with practice, the blindfolded group to a greater degree, largely due to improvements in the use of spectral cues. The blindfolded group took longer to respond than the sighted group, but showed greater decrements in response time with practice. 相似文献
2.
Wang Binglin Ma Shiming Chian Jian Zong Huiqi Tang Quanyong 《Radiation Physics and Chemistry》1998,52(1-6):439-442
The radiation facility was made by Sulzer Company in Switzerland. The designed capacity is 3.7 × 1016Bq( 1MCi) and 12.21 × 1015Bq(330kCi)of Cobalt -60 source was loaded at the first phase. Current cobalt -60 source-loading is 2.4 × 1016Bq(650kCi). The equipment assembling and installation regulating and testing were completed at the end of 1988. The facility was put into commissioning in 1989. It operates 7000–8000 hours per year. The facility has been utilized to carry out many research work and irradiate many kinds of items. Lots of economical benefits have been gained since then. Now it is becoming a radiation processing model base in China. This paper summarized the strong and weak points of the design of the facility through in eight years' practice and analysed the economical benefits. 相似文献
3.
4.
Taking a typical local and industry-orientated applied chemistry major as an example with focusing on the major changes in the form and content of the petrochemical industry, the way to reform the core curriculum system and teaching contents is presented. Based on the changing tendency of refinement of the petrochemical industry, a complete curriculum system with distinctive industry characteristics is set up according to the principles of the emerging engineering education (3E) with several reasonable suggestions. A new model for the construction of a 3E major in chemistry-related majors is suggested. It is a good reference for the construction of curriculum systems for other local and industry-orientated colleges who want to make 3E reform. 相似文献
5.
Based on the analysis of the courses and the investigation of students' online learning needs, an online teaching mode of "Tencent Classroom" and "Rain Classroom" with "split screen" is designed. This mode is used for the online teaching of "Foundation of Innovation and Entrepreneurship" and "Chemical Instrumentation and Automation". After two months of teaching practice, the teaching and learning were reflected and summarized, aiming to improve the performance of online teaching. 相似文献
6.
为应对移动通信业务量的迅猛增长,以及对信息传输的速率、时延、可靠性等各方面都提出了更高的要求,大规模多进多出(Massive MIMO,m MIMO)因其空间资源挖掘的独特优势而获得青睐与重视,可实现系统频谱和能量效率的极大化,已成为5G的关键技术之一。文章介绍了m MIMO的关键技术原理,提出了针对不同TR数的设备进行差异性部署的方法,同时介绍了m MIMO最关键的波束赋形技术的优化思路和详细案例,为后续打造低成本优质5G精品网络具有重要意义。 相似文献
7.
We point out the need for Behavioral Operational Research (BOR) in advancing the practice of OR. So far, in OR behavioral phenomena have been acknowledged only in behavioral decision theory but behavioral issues are always present when supporting human problem solving by modeling. Behavioral effects can relate to the group interaction and communication when facilitating with OR models as well as to the possibility of procedural mistakes and cognitive biases. As an illustrative example we use well known system dynamics studies related to the understanding of accumulation. We show that one gets completely opposite results depending on the way the phenomenon is described and how the questions are phrased and graphs used. The results suggest that OR processes are highly sensitive to various behavioral effects. As a result, we need to pay attention to the way we communicate about models as they are being increasingly used in addressing important problems like climate change. 相似文献
8.
关于培养集成电路专业应用型人才的思考 总被引:3,自引:0,他引:3
在分析我国信息技术产业发展现状的基础上,结合集成电路产业发展需求,探索了在新机遇和新要求条件下集成电路专业人才培养模式。坚持学以致用的教学理念,以培养创新精神和实践能力为出发点,通过完善专业课程体系、深化教学内容与教学方法的综合改革,建立了集成电路专业应用型人才培养方案。 相似文献
9.
“精细化管理”通过规则的系统化和细化,运用程序化、标准化、数据化和信息化的手段,使组织管理各单元精确、高效、协同和持续运行,是一种使组织在当前国际化发展环境下,对抗金融危机,转变粗放式管理方式的有效的管理理念和管理技术。本文介绍了万达信息多年以来经过实践形成的一套适用于组织持续稳定发展的精细化管理方法. 相似文献
10.