全文获取类型
收费全文 | 320篇 |
免费 | 53篇 |
国内免费 | 19篇 |
专业分类
电工技术 | 38篇 |
综合类 | 21篇 |
化学工业 | 37篇 |
金属工艺 | 10篇 |
机械仪表 | 36篇 |
建筑科学 | 25篇 |
矿业工程 | 14篇 |
能源动力 | 15篇 |
轻工业 | 13篇 |
水利工程 | 4篇 |
石油天然气 | 26篇 |
武器工业 | 2篇 |
无线电 | 42篇 |
一般工业技术 | 43篇 |
冶金工业 | 19篇 |
原子能技术 | 5篇 |
自动化技术 | 42篇 |
出版年
2024年 | 1篇 |
2023年 | 15篇 |
2022年 | 24篇 |
2021年 | 25篇 |
2020年 | 24篇 |
2019年 | 14篇 |
2018年 | 20篇 |
2017年 | 17篇 |
2016年 | 16篇 |
2015年 | 23篇 |
2014年 | 16篇 |
2013年 | 9篇 |
2012年 | 15篇 |
2011年 | 15篇 |
2010年 | 17篇 |
2009年 | 3篇 |
2008年 | 15篇 |
2007年 | 14篇 |
2006年 | 9篇 |
2005年 | 9篇 |
2004年 | 8篇 |
2003年 | 10篇 |
2002年 | 10篇 |
2001年 | 8篇 |
2000年 | 6篇 |
1999年 | 8篇 |
1998年 | 7篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 3篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 1篇 |
1986年 | 3篇 |
1984年 | 1篇 |
1982年 | 1篇 |
排序方式: 共有392条查询结果,搜索用时 15 毫秒
81.
GONG Guanqun XIE Guangyuan ZHANG Yingjie WANG Ziliang WANG Jin XIE Linghui LUO Zhenfu 《中国矿业大学学报(英文版)》2010,20(4)
The dewatering of fine, flotation cleaned coals from Huaibei and Xuzhou (bituminous) and Yongcheng (anthracite) were studied. The supernatant and filter cake were examined to determine the rate and extent of flocculation and dewatering. A starch-based filter aid was used to increase flocculation and dewatering rates. The filtration constant, K, and compression index, s, of the Yongcheng slurry were measured under various conditions. A designed experiment was performed to determine optimum conditions for dewatering. The results showed that the filter aid enhanced flocculation and coagulation of the fine cleaned coal slurry, enhanced the structure of the filter cake and promoted dewatering of the cake. Moisture content in the cake was reduced to 17% after vacuum filtration. 相似文献
82.
Mais NijimAuthor Vitae Ziliang ZongAuthor VitaeShu YinAuthor Vitae Kiranmai BellamAuthor VitaeXiao QinAuthor Vitae 《Journal of Parallel and Distributed Computing》2011,71(2):288-301
In the past decade, parallel disk systems have been highly scalable and able to alleviate the problem of disk I/O bottleneck, thereby being widely used to support data-intensive applications. Although a variety of parallel disk systems were developed, most existing disk systems lack a means to adaptively control the quality of security for dynamically changing workloads. We address this gap in disk technology by designing, implementing, and evaluating a quality of security control framework for parallel disk systems, or ASPAD for short, that makes it possible for parallel disk systems to adapt to changing security requirements and workload conditions. The ASPAD framework comprises four major components, namely, a security service middleware, a dynamic data-partitioning mechanism, a response time estimator, and an adaptive security quality controller. The framework is conducive to adaptively and expeditiously determining security services for requests submitted to a parallel disk system in a way to improve security of the disk system while making an effort to guarantee desired response times of the requests. We conduct extensive experiments to quantitatively evaluate the performance of the proposed ASPAD framework. Empirical results show that ASPAD significantly improves the overall performance of parallel disk systems over the same disk systems without using the ASPAD framework. 相似文献
83.
提出了基于方式变化影响域和故障量排序的继电保护定值快速在线预警方法。该方法以保护所在位置的短路电流、分支系数等继电保护定值计算相关故障量的变化率为判据,确定线路和变压器等电网元件开断后,定值将受到显著影响的保护集合。通过对故障量计算结果的排序优化来进一步提高定值在线分析的速度,实现继电保护定值的快速在线预警。工程实际应用表明,该方法可以快速准确地预警存在保护定值隐患的电网特殊运行方式和保护装置。 相似文献
84.
85.
86.
87.
88.
Cao Min Liu Senping Zhu Qingli Wang Ya Ma Jingyu Li Zeshen Chang Dan Zhu Enhui Ming Xin Puchtler Florian Breu Josef Wu Ziliang Liu Yingjun Jiang Yanqiu Xu Zhen Gao Chao 《纳微快报(英文)》2022,14(1):1-14
Nano-Micro Letters - Ultrathin, lightweight, and flexible aligned single-walled carbon nanotube (SWCNT) films are fabricated by a facile, environmentally friendly, and scalable printing... 相似文献
89.
对刀具刃倾角λs≠ 0°时刀具的标注角度、实际工作角度进行了理论分析 ,推导了λs 影响下的工作角度计算公式 ,并给出了λs 对刀具工作角度的影响曲线。 相似文献
90.