%0 Journal Article
%T AN ANALYSIS OF FU S WORK REALIZING MAXWELL S DEMON<br>对傅氏等实现麦克斯韦设想的研究工作的分析
%A Wang Yuzhi
%A <br>王欲知
%J 电子与信息学报
%D 1986
%I 
%X In 1979, Fu and his colleagues presented their work of realizing Maxwall's demon, theoretically and experimentally, in Journal of Shanghai Jiaotong University. Fu declared that a "permanent" current was obtained in their device. This means that a new machine of the seeond kind of perpetual motion have been invented.In this paper, the author gives a detail anslysis of Fu's work, and the following conclusions have been obtained: (1) In Fu's experiment, the object controlled by the magnetic field was the mass-motion of electrons, not the individual electron. Magnetic field did not separate electrons individually into high-speed group and low-speed group, for this reason, it is not a "demon". The process which occured in the whole experiment was a mass-flowing process of numerous amount of particules. this must be belong to the area of thermodynamics. (2) The current flowing in Fu's device is actually the initial velocity current of a vacuum diode. (3) The initial velocity current is in turn a changed form of Thomson thermoelectric effect, which necessitates a hot tank and a cold tank to work, obeying the second law of thermodynamics. (4) The role of action of the magnetic field is to control the mass-motion of electrons, causing a weak rectification effect in the device. The current should vanish if there is no this effect, as the initial-velocity elelctrons should eliminates each other.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=78EB5E07534491E2&yid=4E65715CCF57055A&vid=5D311CA918CA9A03&iid=0B39A22176CE99FB&sid=5E25104E99903E8A&eid=A8DE7703CC9E390F&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=17