共查询到20条相似文献,搜索用时 140 毫秒
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任胜利 《中国有色金属学报》2005,15(1):F003-F003
摘要(Abstract)是现代科技论文中必不可少的内容,国家标准GB 6447—86对摘要的定义为:“以提供文献内容梗概为目的,不加评论和补充解释,简明、确切地记叙文献重要内容的短文。”摘要作为科技论文的重要组成部分,有其特殊的意义和作用,它是知识传播、学术交流与合作的“桥梁”和媒介,尤其是目前国际上各主要检索机构的数据库对摘要的依赖性很强,因此,好的摘要对于增加期刊和论文的被检索和引用机会、吸引读者、扩大影响起着不可忽视的作用。 相似文献
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介绍了科技论文的基本结构及摘要与关键词对论文检索的重要性,详细叙述了论文摘要的写作方法、关键词的选择与参考文献的著录规则,列举了《模具工业》期刊常用的一些关键词,可为科技论文的写作与修改提供参考。 相似文献
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基于CORBA面向对象的FMS控制系统模型 总被引:5,自引:0,他引:5
为了使FMS控制软件系统具有开放性,本文提出了基于CORBA 面向对象的FMS控制系统模型,将相关可编程设备的物理单元抽象为对象。为了方便异构物理单元的集成,各个物理单元对象通过继承抽象单元类共享公共通讯协议( 单元与单元之间及单元与总控制器之间通讯协议) 。此外,FMS的其它相关物理和抽象实体也抽象为对象。为了证实本文提出的控制模型,在VC+ + 5 .0 编程平台下编制了FMS控制软件,并在上海交通大学生产与控制技术研究所FMS示范系统进行了检验。 相似文献
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利用最小偏差法圆弧插补的基本原理,从推导基本公式起,不采用参考书中的坐标变换方法,而直接用原坐标得出的偏差判别式作为最终的递推公式。此方法省去了改变卦限时的复杂的判别过程,简化了程序,缩短了插补周期,并由此得出采用赋值方法编制程序,使其简洁明了,也有利于提高插补速度,已在实践中得到应用。 相似文献
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Wolfram Schenck 《连接科学》2011,23(4):239-283
This paper focuses on adaptive motor control in the kinematic domain. Several motor-learning strategies from the literature are adopted to kinematic problems: ‘feedback-error learning’, ‘distal supervised learning’, and ‘direct inverse modelling’ (DIM). One of these learning strategies, DIM, is significantly enhanced by combining it with abstract recurrent neural networks. Moreover, a newly developed learning strategy (‘learning by averaging’) is presented in detail. The performance of these learning strategies is compared with different learning tasks on two simulated robot setups (a robot-camera-head and a planar arm). The results indicate a general superiority of DIM if combined with abstract recurrent neural networks. Learning by averaging shows consistent success if the motor task is constrained by special requirements. 相似文献
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Reward shaping has been shown to significantly improve an agent's performance in reinforcement learning. As attention is shifting away from tabula-rasa approaches many different reward shaping methods have been developed. In this paper, we compare two different methods for reward shaping; plan-based, in which an agent is provided with a plan and extra rewards are given according to the steps of the plan the agent satisfies, and reward shaping via abstract Markov decision process (MDPs), in which an abstract high-level MDP of the environment is solved and the resulting value function is used to shape the agent. The comparison is conducted in terms of total reward, convergence speed and scaling up to more complex environments. Empirical results demonstrate the need to correctly select and set up reward shaping methods according to the needs of the environment the agents are acting in. This leads to the more interesting question, is there a reward shaping method which is universally better than all other approaches regardless of the environment dynamics? 相似文献
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P. C. Mathur S. Annavarapu A. Lawley D. Apelian 《Journal of Thermal Spray Technology》1995,4(2):145-146
Extracted from the “Symposium on Spray Forming,” paper 10 of 12 contributions, held at the National Thermal Spray Conference,
Anaheim, June 1993. This abstract has been edited by C.C. Berndt (SUNY at Stony Brook). 相似文献
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初始图形交换规范IGES是CAD/CAM系统间通讯的重要方式之一。文章概略了IGES文件的结构及IGES曲面实体数据的含义,给出了在逆向工程系统中识别提取IGES曲面实体数据和利用OpenGL对其显示实现的方法。 相似文献