The effect of adding Ta on the changes of microstructure and Ms temperature of a dualphase shape memory alloy with compositions of (Ni51 Ti49)1 -x.Tax. and Ni50-Ti50 -g.Ta.g were systematically studied. An optical mi...The effect of adding Ta on the changes of microstructure and Ms temperature of a dualphase shape memory alloy with compositions of (Ni51 Ti49)1 -x.Tax. and Ni50-Ti50 -g.Ta.g were systematically studied. An optical microscope, SEM, X-ray diffraction and DSC were utilized in this work. The evolution of the microstructure as a function of Ta content was characterized. The variation of the Ni/Ti ratio in the NiTi phase plays an important role in the change of the Ms temperatures due to the addition of Ta. A pseudobinary NiTi-Ta phase diagram was proposed based on these results.展开更多
A gen t和多A gen t系统已经成为计算机科学和分布式人工智能研究的一个重要方向。该文重点介绍了基于多A gen t技术的操作票生成系统的模型的建立,研究了通过A gen t选择意图模型来实现操作任务的规划,以及对单个A gen t的推理机制和...A gen t和多A gen t系统已经成为计算机科学和分布式人工智能研究的一个重要方向。该文重点介绍了基于多A gen t技术的操作票生成系统的模型的建立,研究了通过A gen t选择意图模型来实现操作任务的规划,以及对单个A gen t的推理机制和知识库中的符号化描述,并讨论了A gen t自学习及多A gen t之间的交互通信等问题。开发实现基于多A gen t变电站倒闸操作票生成系统,在某变电站得到良好的应用。实践表明,基于多A gen t系统能大大提高工作效率和准确度,特别是基于A gen t选择意图模型来实现操作任务的规划更能适应外界环境的变化。展开更多
电流差动保护中的 TA 饱和造成了对短路电流的变换误差,从而影响了差动保护的动作可靠性。本文在分析造成 TA 饱和的原因和饱和电流的特点基础上,提出了改进的时差法鉴别 TA饱和的新方案,并对这一新方案进行了仿真分析。通过仿真分析可...电流差动保护中的 TA 饱和造成了对短路电流的变换误差,从而影响了差动保护的动作可靠性。本文在分析造成 TA 饱和的原因和饱和电流的特点基础上,提出了改进的时差法鉴别 TA饱和的新方案,并对这一新方案进行了仿真分析。通过仿真分析可以发现,改进的时差法可以有效鉴别 TA 饱和,防止 TA 饱和引起的差动保护误动作。展开更多
基金Supported by National Natural Science Foundation of China （61079001, 61273006）, National High Technology Research and Development Program of China （863 Program） （2011AA110301）, and Specialized Research Fund for the Doctoral Program of Higher Education of China （20111103110017）
文摘The effect of adding Ta on the changes of microstructure and Ms temperature of a dualphase shape memory alloy with compositions of (Ni51 Ti49)1 -x.Tax. and Ni50-Ti50 -g.Ta.g were systematically studied. An optical microscope, SEM, X-ray diffraction and DSC were utilized in this work. The evolution of the microstructure as a function of Ta content was characterized. The variation of the Ni/Ti ratio in the NiTi phase plays an important role in the change of the Ms temperatures due to the addition of Ta. A pseudobinary NiTi-Ta phase diagram was proposed based on these results.
文摘A gen t和多A gen t系统已经成为计算机科学和分布式人工智能研究的一个重要方向。该文重点介绍了基于多A gen t技术的操作票生成系统的模型的建立,研究了通过A gen t选择意图模型来实现操作任务的规划,以及对单个A gen t的推理机制和知识库中的符号化描述,并讨论了A gen t自学习及多A gen t之间的交互通信等问题。开发实现基于多A gen t变电站倒闸操作票生成系统,在某变电站得到良好的应用。实践表明,基于多A gen t系统能大大提高工作效率和准确度,特别是基于A gen t选择意图模型来实现操作任务的规划更能适应外界环境的变化。
文摘电流差动保护中的 TA 饱和造成了对短路电流的变换误差,从而影响了差动保护的动作可靠性。本文在分析造成 TA 饱和的原因和饱和电流的特点基础上,提出了改进的时差法鉴别 TA饱和的新方案,并对这一新方案进行了仿真分析。通过仿真分析可以发现,改进的时差法可以有效鉴别 TA 饱和,防止 TA 饱和引起的差动保护误动作。
