Results of calculation the recovery voltages conditioned by capacitive currents switching-off by high voltage vacuum and auto-compression （SF6） circuit-breakers are presented in the article. The purpose of research ...Results of calculation the recovery voltages conditioned by capacitive currents switching-off by high voltage vacuum and auto-compression （SF6） circuit-breakers are presented in the article. The purpose of research was evaluating the maximum values of recovery voltages and also studying the dependence of recovery voltages on some influencing factors, especially on type of circuit-breaker presented in numerical models with its dielectric strength restoration law, chopping current and operation time. The research was carried out with using computer simulation.展开更多
Since ancient times, man has been concerned to create an artificial structure similar to itself. This concern has remained constant attention and creative thinkers most profound since antiquity until today, it is of g...Since ancient times, man has been concerned to create an artificial structure similar to itself. This concern has remained constant attention and creative thinkers most profound since antiquity until today, it is of greatest interest. This article aims to highlight the most significant moments of the evolution from mechanical creatures mythical or real, from antiquity to the present humanoid robots. There are thus shown the most significant variants humanoid imagined or realized since Talos, described in Greek mythology, continuing with mechanical machines during late Roman Empire, the Byzantine Empire and then the Renaissance of the post-renaissance, then they are shown the main achievements of the industrialization period from the nineteenth to the early part of the twentieth century, then to the most important made in the last decades of the twentieth century and early twenty-first century. The work is important to stimulate concerns academic theorists and practice but also in the industrial practice specializing in robotics and more generally in mechatronics. It also opens the prospect of defining the concept of an artificial humanoid useful both for human prosthesis with certain disabilities, and a humanoid robot performance.展开更多
Limit language complexity of cellular automata which is first posed by S. Wolfram has become a new branch of cellular automata. In this paper, we obtain two interesting relationships between elementary cellular automa...Limit language complexity of cellular automata which is first posed by S. Wolfram has become a new branch of cellular automata. In this paper, we obtain two interesting relationships between elementary cellular automata of rules 126, 146（182） and 18, and prove that if the limit language of rule. 18 is not regular, nor are the limit languages of rules 126 and 146（182）.展开更多
文摘Results of calculation the recovery voltages conditioned by capacitive currents switching-off by high voltage vacuum and auto-compression （SF6） circuit-breakers are presented in the article. The purpose of research was evaluating the maximum values of recovery voltages and also studying the dependence of recovery voltages on some influencing factors, especially on type of circuit-breaker presented in numerical models with its dielectric strength restoration law, chopping current and operation time. The research was carried out with using computer simulation.
文摘Since ancient times, man has been concerned to create an artificial structure similar to itself. This concern has remained constant attention and creative thinkers most profound since antiquity until today, it is of greatest interest. This article aims to highlight the most significant moments of the evolution from mechanical creatures mythical or real, from antiquity to the present humanoid robots. There are thus shown the most significant variants humanoid imagined or realized since Talos, described in Greek mythology, continuing with mechanical machines during late Roman Empire, the Byzantine Empire and then the Renaissance of the post-renaissance, then they are shown the main achievements of the industrialization period from the nineteenth to the early part of the twentieth century, then to the most important made in the last decades of the twentieth century and early twenty-first century. The work is important to stimulate concerns academic theorists and practice but also in the industrial practice specializing in robotics and more generally in mechatronics. It also opens the prospect of defining the concept of an artificial humanoid useful both for human prosthesis with certain disabilities, and a humanoid robot performance.
基金This research is supported by the National Natural Science Foundation of China(10101016).
文摘Limit language complexity of cellular automata which is first posed by S. Wolfram has become a new branch of cellular automata. In this paper, we obtain two interesting relationships between elementary cellular automata of rules 126, 146（182） and 18, and prove that if the limit language of rule. 18 is not regular, nor are the limit languages of rules 126 and 146（182）.
