全文获取类型
收费全文 | 68篇 |
免费 | 6篇 |
国内免费 | 3篇 |
专业分类
电工技术 | 3篇 |
综合类 | 5篇 |
金属工艺 | 2篇 |
机械仪表 | 4篇 |
建筑科学 | 16篇 |
矿业工程 | 1篇 |
能源动力 | 1篇 |
轻工业 | 9篇 |
无线电 | 3篇 |
一般工业技术 | 4篇 |
自动化技术 | 29篇 |
出版年
2024年 | 2篇 |
2023年 | 1篇 |
2022年 | 1篇 |
2021年 | 1篇 |
2019年 | 1篇 |
2017年 | 1篇 |
2016年 | 4篇 |
2015年 | 4篇 |
2014年 | 5篇 |
2013年 | 4篇 |
2012年 | 5篇 |
2011年 | 5篇 |
2010年 | 6篇 |
2009年 | 4篇 |
2008年 | 2篇 |
2007年 | 4篇 |
2006年 | 3篇 |
2004年 | 3篇 |
2003年 | 3篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 5篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有77条查询结果,搜索用时 0 毫秒
1.
利用Flash 8.0的setRGB语句来设置颜色变量,实现控制背景和场景中“灯”的颜色变化.利用的知识有:实体命名;按钮制作;设定变量;编辑按钮脚本.通过这个小制作可进一步领略Flash中“动作”语言在制作动画效果以及网页制作方面的优势. 相似文献
2.
3.
简要介绍了模糊传感器的概念与功能,综述了国外模糊传感器样机的研制情况,并展望了模糊传感器的发展趋势。 相似文献
4.
Road network robustness is the ability of a road network to operate correctly under a wide range of attacks. A structural robustness analysis can describe the survivability of a city road network that is under attack and can help improve functions such as urban planning and emergency response. In this paper, a novel approach is presented to quantitatively evaluate road network robustness based on the community structure derived from a city road network, in which communities refer to those densely connected subsets of nodes that are sparsely linked to the remaining network. First, a road network is reconstructed into a set of connected communities. Then, successive simulated attacks are conducted on the reconstructed road networks to test the performance of the networks under attack. The performance of the networks is represented by efficiency and the occurrence of fragmentation. Three attack strategies, including a random attack and two intentional attacks, are performed to evaluate the survivability of the road network under different situations. Contrary to the traditional road segment-based approach, the community-based robustness analysis on a city road network shows distinct structural diversity between communities, providing greater insight into network vulnerability under intentional attacks. Six typical city road networks on three different continents are used to demonstrate the proposed approach. The evaluation results reveal an important feature of the structure of city road networks from a community-based perspective, i.e., that the structure is robust under random failure but fragile under intentional attack. This result is highly consistent in different city road network forms. 相似文献
5.
Mistuning, imperfections in cyclical symmetry of bladed disks is an inevitable and perilous occurrence due to many factors including manufacturing tolerances and in-service wear and tear. It can cause some unpredictable phenomena such as mode splitting, mode localization and dramatic difference in forced vibration response. In this paper first, a method is presented which calculates the forced vibration response of a mistuned system based on an exact relationship between tuned and mistuned systems. Then, the genetic algorithm is used for solving an optimization problem to find the worst-case response of bladed-disk assembly. The second part tries to find methods to reduce the system worst-case response. Intentional mistuning which breaks the nominal symmetry of a tuned bladed disk and rearranging the bladed-disk assembly are introduced and used to reduce the system worst-case response. Finally, a two degree of freedom per blade simplified model with 56 blades is used to demonstrate the capabilities of the techniques in reducing the worst response of the bladed-disk system. 相似文献
6.
A treatise on order in engineering design research 总被引:5,自引:1,他引:4
Engineering design research shows a rather fragmented, if not a chaotic, picture. But does it have a hidden order? Can we explore it, or should we impose a reasoning model? This paper looks for the answer in the purpose of engineering design. It is destined to sustain human existence and well being by virtual creation of artifacts and services for the society. To this end, the engineering design discipline should provide a proper body of knowledge. The design knowledge obtained by empirical exploration and/or rational comprehension should be transformed for practical/pragmatic deployment. It was assumed that this purposely streaming of design knowledge gives a unique rationale for engineering design research. Based on this, a framework of reasoning was constructed, including source, channel, and sink categories of knowledge and research of engineering design, respectively. Within each category, research domains, trajectories, and approaches were identified. The semantic relationships of domains, trajectories, and approaches form a hierarchical structure. The proposed framework enables a grounded argumentation about the order of engineering design research, as well as about the articulation of the engineering design knowledge. 相似文献
7.
Injuries cause 10% of the mortality and 15% of disability worldwide. However, there is a paucity of data on injuries in the developing world where two-thirds of all injury deaths occur. This is the first published report characterizing the overall problem of injuries in the Philippines, a developing country in southeast Asia. This report defines the burden of injuries in the Philippines and identifies priority areas for the national health research agenda. A systematic review of 35 years of published and unpublished data on injuries in the Philippines (1960–1995) was conducted. Injury fatality rates increased by 196% from 14.3 per 100,000 in 1960 to 42.3 per 100,000 in 1995, and one in 11 deaths in the Philippines are due to injuries. Intentional injuries account for 48% of all injury deaths and motor vehicle crashes for 15%. For 15–44 year old males, injuries account for 42% of all deaths, 67% of which are intentional. The proportion of all deaths attributable to intentional injuries has increased by 925% and that of motor vehicle crashes by 600% from 1960 to 1995. Improvements in injury surveillance and documentation of non-fatal injury outcomes are needed. Research into risk factors and potential interventions for the prevention of intentional injuries should be a priority in the Philippines. 相似文献
8.
符号学经过多年的发展,已被广泛应用于各个领域。建筑符号学作为符号学系统的一类,对建筑、室内设计实践有着极其重要的指导意义。文章以广东石油化工学院实验楼室内设计实践为例,从理论基础、主题文脉、设计理念、符号衍生、符号运用等方面,阐释了建筑符号学在室内设计中的提取、演绎、创作与识读历程。其在设计实践领域的运用,能将设计聚"形"、延"意"、传"神",能有效地使空间设计继承文化、延伸意义和内涵,让空间充满生命力。如此,既丰富了设计的理论、构思与表达,又为信息的传递提供了媒介,也为解决建筑、室内设计中"文化缺失"、"意义危机"等问题提供了重要途径。 相似文献
9.
扫描地图的计算机自动识别 总被引:1,自引:0,他引:1
扫描地图的计算机自动识别是当今地图制图学科的前沿课题,也是其重要的研究方向。为此,本文首先将模式识别技术引入到地图制图领域中,提出了四种地图符号的计算机描述方法,然后又讨论了扫描地图的信息获取与处理,并具体地分析了扫描地图的计算机识别方法及其识别系统.最后还给出了相应的符号识别实验。 相似文献
10.
吴玮玮 《计算机测量与控制》2024,32(7):252-259
有意电磁波与汽车仪器电磁传输波产生的混合干扰,降低了汽车组合仪表的稳定运行能力,造成仪表设备失灵。为避免上述情况的发生,设计汽车组合仪表有意电磁干扰空时域联合分离系统。在步进电机驱动电路中,设置汽车组合仪表控制器、分离电源与 PCB 电路板、有意电磁干扰数字传感器。分配有意电磁波空时域源地址,通过计算干扰信号平坦度的方式,确定脉冲参数的取值范围,实现汽车组合仪表有意电磁的空时域干扰效应分析。估算有意电磁波干扰信号的数目,按照信号分解的处理原则,求解联合分离修正函数,实现电磁干扰的联合分离。实验结果表明,设计系统应用后可以在混合信号中,按照空域、时域标准的不同分离有意电磁波,不会因混合干扰降低汽车组合仪表的稳定运行能力。 相似文献