Wang H.,Jiaozuo Teachers College
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2014
In this paper, an improved genetic algorithm is used in the computer network reliability optimization computing to achieve the goal of reducing the cost of network link medium and improving the network reliability, with simple algorithm, easy programming and good readability. The simulation example proves that the genetic algorithm is of practical value in solving the said problem above. © Sila Science. All rights reserved.
Zhang W.,Tongji University |
Zhang W.,Jiaozuo Teachers College |
Kuang C.,Tongji University |
Yang Q.,Fudan University
Synthesis | Year: 2010
4-Aryl-1H-1,2,3-triazoles were synthesized from anti-3-aryl-2,3- dibromopropanoic acids and sodium azide by a one-pot method using N,N-dimethylformamide as solvent in the presence of tris(dibenzylideneacetone) dipalladium(0) [Pd2(dba)3] and Xantphos. © Georg Thieme Verlag Stuttgart.
Ming H.,Soochow University of China |
Ming H.,Hanyang University |
Yan Y.,Jiaozuo Teachers College |
Ming J.,Hanyang University |
And 4 more authors.
Electrochimica Acta | Year: 2014
The spinel LiMn2O4 was recognized as an appealing candidate cathode material for high rate Li-ion battery, but it suffers from severe capacity fading, especially at a high temperature. In order to solve this problem, we prepared V2O5 coated LiMn2O 4 (LiMn2O4@V2O5) samples in this work and its structure and morphology were characterized by powder X-ray diffraction, scanning electron microscope, and transmission electron microscope. The LiMn2O4@V2O5 material delivers an excellent cycling ability and rate capability in lithium batteries, while sustaining a capacity of 75.5 mAh g-1 after 200 cycles at 2 C with a high operating temperature (328 K). This performance are much better than that of LiMn2O4 (35.4 mAh g-1) without V2O5 coating, the capacity of which faded seriously. These results indicated that the surface modification of V 2O5, which possess a relative lower operating potential (≤ 3.7 V, LixV2-x/5O5) compare to the LiMn2O4 (∼ 3.9 and 4.1 V), can improve the electrochemical properties of LiMn2O4 by endowing a fast lithium diffusion and reasonable electronic conductivity which facilitates the transformation of the electrons and ions. In addition, the acidic and isolated protective layer of V2O5 can work as a HF inhibitor and/or HF scavenger and suppress the dissolution of manganese into electrolyte. Thus, we believe that such a LiMn2O4@V2O5 composite can be an economical and viable candidate cathode material for Li-ion batteries. © 2014 Elsevier Ltd.
Chen X.,Jiaozuo Teachers College
Lecture Notes in Electrical Engineering | Year: 2013
There are certain differences in the word order between English and Chinese because of different cultural backgrounds and language habits. On the basis of analyzing and comparing the word order differences between English and Chinese, the author attempts to sort out some laws which may help improve writing and translation teaching of the target language. © 2013 Springer-Verlag.
Guo S.,Henan Normal University |
Li Y.,Jiaozuo Teachers College |
Tao L.,Henan Normal University |
Zhang W.,Henan Normal University |
Fan X.,Henan Normal University
RSC Advances | Year: 2014
An efficient and practical procedure for the preparation of 2-substituted and 2,3-disubstituted quinazolinones was achieved through copper-catalyzed tandem reaction of 2-bromobenzamides with aldehydes and aqueous ammonia under air. Control experimental results indicated that this tandem reaction is triggered by a copper-catalyzed direct amination of 2-bromobenzamides with aqueous ammonia, followed by cyclocondensation and oxidative aromatization. As an application, this novel methodology provides a concise and practical one-pot route to the synthesis of alkaloid tryptanthrin. This journal is © The Royal Society of Chemistry.