目的为提高尾鳍驱动型水下机器人的工作效率,优化尾鳍驱动装置的硬件和软件提供理论支撑。方法将中国知网数据库与Web of Science数据库作为研究数据来源,对相关文献进行系统梳理,使用Citespace和VOSviewer软件对文献作者、所属机构、...目的为提高尾鳍驱动型水下机器人的工作效率,优化尾鳍驱动装置的硬件和软件提供理论支撑。方法将中国知网数据库与Web of Science数据库作为研究数据来源,对相关文献进行系统梳理,使用Citespace和VOSviewer软件对文献作者、所属机构、关键词和研究热点进行可视化图谱绘制。结果通过对文献的分析,确定三个热点研究方向,分别是尾鳍驱动装置的外形结构设计、驱动方式和控制系统设计、材料设计,并根据各研究方向提炼出对应的研究方法:基于设计形态学、结构仿生学和工程优化的外形结构设计方法,基于自下而上和模块化的驱动方式设计方法,基于滑模控制、模糊控制和PID控制系统设计方法,以及基于仿生材料、智能材料和计算机模拟的材料设计方法等。结论对目前尾鳍驱动型机器人的主要研究内容、优势特点、存在问题、设计方法和未来趋势进行总结,为相关领域的发展提供参考和依据。展开更多
There is the challenge to use materials in a more sustainable way.Even though cork has an interesting eco-profile as a material,other aspects contributing to an enhanced sustainable use of the resource are discussed:a...There is the challenge to use materials in a more sustainable way.Even though cork has an interesting eco-profile as a material,other aspects contributing to an enhanced sustainable use of the resource are discussed:addressing the life-span of products,materials substitution,and the trend of materials development identified.展开更多
At present CALPHAD (CALculation of PHAse Diagram) technique is notcapable of predicting whether there exists intermediate compound,much less predicting the formulae, the number, and the meltingcongruence of intermedi-...At present CALPHAD (CALculation of PHAse Diagram) technique is notcapable of predicting whether there exists intermediate compound,much less predicting the formulae, the number, and the meltingcongruence of intermedi- ate compounds. To solve this problem, a newapproach called the phase diagram evaluation by pattern recognition(PDEPR) was improved. The micro-parameters. Such as the radius andthe electronegativity of the different features in multi-dimensionalspace.展开更多
Industrial mixers for powders and granular materials operate with no effective control of mixture quality and lack scientific design. The last twenty years have seen growth in understanding of mixing and mixers. Howev...Industrial mixers for powders and granular materials operate with no effective control of mixture quality and lack scientific design. The last twenty years have seen growth in understanding of mixing and mixers. However, research falls far short of what is needed for on-line characterisation of mixture quality. Secondly, although theoretical descriptions of a few mixer types have been reported, these fall far short of what is needed for equipment design. Two thrusts could revolutionise this situation. One is a scientific characterisation of mixer structure applicable to industrial scale as well as laboratory scale equipment; this is now within our grasp using digital imaging. The other is the development of ideas to overcome the restricted number of particles that can be used in the Distinct Element Method （DEM） for mixers. The goal should be to take the designer through a sequence of steps to the most appropriate mixer size, configuration and operating conditions for a given process duty.展开更多
文摘目的为提高尾鳍驱动型水下机器人的工作效率,优化尾鳍驱动装置的硬件和软件提供理论支撑。方法将中国知网数据库与Web of Science数据库作为研究数据来源,对相关文献进行系统梳理,使用Citespace和VOSviewer软件对文献作者、所属机构、关键词和研究热点进行可视化图谱绘制。结果通过对文献的分析,确定三个热点研究方向,分别是尾鳍驱动装置的外形结构设计、驱动方式和控制系统设计、材料设计,并根据各研究方向提炼出对应的研究方法:基于设计形态学、结构仿生学和工程优化的外形结构设计方法,基于自下而上和模块化的驱动方式设计方法,基于滑模控制、模糊控制和PID控制系统设计方法,以及基于仿生材料、智能材料和计算机模拟的材料设计方法等。结论对目前尾鳍驱动型机器人的主要研究内容、优势特点、存在问题、设计方法和未来趋势进行总结,为相关领域的发展提供参考和依据。
基金the Portuguese Foundation for Science and Technology (FCT reference:SFRH/BD/46646/2008)
文摘There is the challenge to use materials in a more sustainable way.Even though cork has an interesting eco-profile as a material,other aspects contributing to an enhanced sustainable use of the resource are discussed:addressing the life-span of products,materials substitution,and the trend of materials development identified.
基金the National Natural Science Foundation of China (No. 50071009), the Foundation of Natural Science of Anhui Province 00046509, t
文摘At present CALPHAD (CALculation of PHAse Diagram) technique is notcapable of predicting whether there exists intermediate compound,much less predicting the formulae, the number, and the meltingcongruence of intermedi- ate compounds. To solve this problem, a newapproach called the phase diagram evaluation by pattern recognition(PDEPR) was improved. The micro-parameters. Such as the radius andthe electronegativity of the different features in multi-dimensionalspace.
文摘Industrial mixers for powders and granular materials operate with no effective control of mixture quality and lack scientific design. The last twenty years have seen growth in understanding of mixing and mixers. However, research falls far short of what is needed for on-line characterisation of mixture quality. Secondly, although theoretical descriptions of a few mixer types have been reported, these fall far short of what is needed for equipment design. Two thrusts could revolutionise this situation. One is a scientific characterisation of mixer structure applicable to industrial scale as well as laboratory scale equipment; this is now within our grasp using digital imaging. The other is the development of ideas to overcome the restricted number of particles that can be used in the Distinct Element Method （DEM） for mixers. The goal should be to take the designer through a sequence of steps to the most appropriate mixer size, configuration and operating conditions for a given process duty.
