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Articles by Dan Hu
Total Records ( 2 ) for Dan Hu
  Chuanhuang Li , Kelei Jin , Weiming Wang and Dan Hu
  ForCES (Forwarding and Control Element Separation)-an open programmable network architecture, is one of the important direction in the research area of NGN (next-generation network). In an NE (network element) with this architecture, CE (Control Element) need send many types messages to FEs (Forwarding Element), such as forwarding tables in ForCES router. For improving the transmission efficiency, saving network bandwidth and reducing the delay, a transmission scheme between CE and FEs is needed in this architecture. By analyzing the requirement of communication in ForCES channel, a protocol of reliable multicast based on TCP/UDP TML (Transport Mapping Layer) is proposed to do the work in this study. The interaction process and detailed protocol packet formats are introduced, and the petri net validation indicates the protocol is safe and living. The performance evaluation for this protocol is also given. It shows the reliable multicast protocol has better performance than the TCP unicast, if CE need send a large number of same messages to many FEs in a ForCES NE.
  Dan Hu , Lei Chen , Zhi-Quan Pan , Huan Liu , Xiang-Gao Meng and You Song
  A new trinuclear complex, lcub[Cu(L)]33-CO3)rcub(ClO4)4 (L = N-(2-thiophenoethyl)-N,N-bis (3-aminopropyl)amine), was synthesized and characterized by single-crystal X-ray analysis. The complex contained three identical mononuclear copper(II) units connected by the μ3-carbonate formed from atmospheric carbon dioxide. The electronic and magnetic properties were studied by cyclic voltammetry and the measurement of magnetic susceptibility, respectively. The μ3-bridging model revealed weak ferromagnetic coupling of Cu(II), with the J value of -11.28 cm-1 and the Zeeman splitting g value of 2.06, which were determined by means of magnetic measurements in the 2-300 K range.
 
 
 
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