全文获取类型
| 收费全文 | 1734篇 |
| 免费 | 16篇 |
| 国内免费 | 53篇 |
专业分类
| 教育 | 1047篇 |
| 科学研究 | 439篇 |
| 各国文化 | 14篇 |
| 体育 | 75篇 |
| 综合类 | 79篇 |
| 文化理论 | 2篇 |
| 信息传播 | 147篇 |
出版年
| 2023年 | 11篇 |
| 2022年 | 20篇 |
| 2021年 | 37篇 |
| 2020年 | 34篇 |
| 2019年 | 28篇 |
| 2018年 | 14篇 |
| 2017年 | 10篇 |
| 2016年 | 21篇 |
| 2015年 | 31篇 |
| 2014年 | 116篇 |
| 2013年 | 119篇 |
| 2012年 | 143篇 |
| 2011年 | 169篇 |
| 2010年 | 157篇 |
| 2009年 | 152篇 |
| 2008年 | 130篇 |
| 2007年 | 124篇 |
| 2006年 | 108篇 |
| 2005年 | 94篇 |
| 2004年 | 69篇 |
| 2003年 | 60篇 |
| 2002年 | 37篇 |
| 2001年 | 18篇 |
| 2000年 | 14篇 |
| 1999年 | 14篇 |
| 1998年 | 4篇 |
| 1997年 | 6篇 |
| 1996年 | 9篇 |
| 1995年 | 3篇 |
| 1994年 | 3篇 |
| 1993年 | 7篇 |
| 1992年 | 6篇 |
| 1991年 | 3篇 |
| 1990年 | 3篇 |
| 1989年 | 1篇 |
| 1988年 | 1篇 |
| 1987年 | 1篇 |
| 1986年 | 1篇 |
| 1985年 | 3篇 |
| 1984年 | 3篇 |
| 1983年 | 3篇 |
| 1982年 | 6篇 |
| 1981年 | 3篇 |
| 1980年 | 1篇 |
| 1979年 | 2篇 |
| 1978年 | 2篇 |
| 1977年 | 2篇 |
排序方式： 共有1803条查询结果，搜索用时 15 毫秒
51.
The U.S.-China dispute surrounding 5G motivates further examination on China’s approach to international standardization. While China’s challenges with various standard initiatives to the global standards regime peaked in the 5G dispute have attracted public interests, scholarly approach to the dispute is still limited. We place the dispute in the context of China’s long-standing attempts for international standardization in ICT sectors. With enhanced economic power, China has pursued for pushing indigenous technologies into international standards, which has been a core part of its national science and technology (S&T) policy. This paper examines China’s international standard initiatives from the perspective of techno-nationalism. Our literature review identifies three pillars of techno-nationalism: state empowerment, growth orientation, and global connection. Then we investigate three cases of WAPI, TD-SCDMA and 5G and discuss how the patterns of developing international standards have varied in the framework of techno-nationalism. Over time, China’s international standard initiatives based on techno-nationalism have strengthened global connection and growth orientation, with increasing proximity to techno-nationalism of the Western style. In particular, China’s aspiration for growth orientation was much enhanced with the 5G standard initiative, compared to WAPI or TD-SCDMA, as it aims to be the first mover in the 5G race. Overall, our study suggests that China’s national S&T policy has been moving from the ‘catch-up’ to the ‘first-mover’ strategy, but the transformation continues to take place in the framework of techno-nationalism. 相似文献
52.
江苏省广播电视总台新建广播融媒体直播车,集成音视频系统,并运用无线自组网、4G传输及卫星“动中通”等通信技术组成稳定可靠的传输系统,实现可移动的融媒体直播。 相似文献
53.
王贵章 《忻州师范学院学报》2010,26(2):47-49
随着世界各国信息高速公路计划的实施,现在Internet正以令人难以置信的速度发展,但是由于技术上的某些原因,Internet的发展受到了一定限制。下一代互联网Internet2的实验计划应用而生,IPv6是其基础和灵魂。作为新一代的网络协议,它成功地解决了现在IP地址不足、网速过慢、安全无保障等一直困扰着我们的难题。我国在IPv6研究上也处于世界先进水平。相信下一代互联网会使人们的生活方式发生根本的改变。 相似文献
54.
阐述了我国反兴奋剂工作的概况,分析了"六城会"反兴奋剂工作面临的挑战,在此基础上提出了"六城会"反兴奋剂工作的几点建议. 相似文献
55.
56.
EViews6软件的逐步回归分析模块在多重共线性教学中的应用 总被引：2，自引：0，他引：2
赵红平 《贵州教育学院学报》2009,25(12):31-34
计量经济学传统教学中对逐步回归法的讲解都是基于EViews软件的较低版本而展开的，这种处理方式虽有助于学生理解逐步回归法的原理，但是回归与检验的多次交替会浪费课堂教学时间，不利于提高教学效率。然而，如果采用含有逐步回归分析模块的EViews6软件来开展多重共线性的教学，变量的筛选工作由软件自动完成，能节省不必要的操作，在不影响教学效果的同时提高教学效率。 相似文献
57.
58.
新媒体的应用推动了相关产业的发展;在媒体融合之势下,图书馆面临各种危机与挑战,传统用户的分流、阅读方式的改变、信息安全的挑战、人才的流失等;解决危机的应对策略包括：借助各种新媒体抓住“受众”,加快技术更新,实现图书馆转型,利用新媒体拓展信息服务模式等。 相似文献
59.
Danuta Ro?? Przemys?aw Adamczyk Joanna Boinska Robert Szafkowski Irena Ponikowska Katarzyna Stankowska Barbara Góralczyk Barbara Ruszkowska-Ciastek 《Journal of Zhejiang University. Science. B》2015,16(5):404-411
Objective
The aim of this study was to evaluate the concentrations of C-reactive protein (CRP), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and the degree of homeostasis model assessment-insulin resistance (HOMA-IR) in patients with morbid obesity exposed to a three-week low-calorie diet and balneotherapy.Methods
The study included 33 patients (25 females and 8 males; mean age 46 years) with body mass index (BMI) values of >40 kg/m2. Evaluations of CRP, IL-6, TNF-α, lipid profile, HOMA-IR, and fasting glucose were carried out before (baseline data) and three weeks after the treatment. The control group consisted of 20 healthy volunteers (15 females and 5 males) with a mean age of 39 years and BMI values of ≤24.9 kg/m2.Results
In the blood of patients with morbid obesity we found significantly elevated levels of CRP, TNF-α, triglycerides, HOMA-IR and fasting glucose, but a decreased level of high density lipoprotein (HDL)-cholesterol, compared with the healthy individuals. The treatment resulted in about a 9.4% reduction in body weight from 122.5 to 111.0 kg and a significant decrease in the concentration of CRP, but no change in TNF-α or IL-6. HOMA-IR was significantly reduced.Conclusion
The decrease in CRP level without changes in TNF-α or IL-6 concentrations after the low-calorie diet and balneological treatment, suggests that an essential amount of adipose tissue must be removed before proper adipocyte function is restored. The decrease in HOMA-IR indicates an improvement in insulin sensitivity, which is beneficial in obese patients.60.
University course assignments increasingly focus on group work and group projects to help students collaboratively discover more about their fields of study. The Thomas G. Carpenter Library realized the need to investigate means for reimagining itself to better accommodate today's researchers. The complex process of planning for the redesign of both services and space undertaken by the library is described and explained in this first of a planned series of articles. 相似文献