摘要：Intercalation transition metal oxides (ITMO)have attracted great attention as lithium-ion battery negative electrodes due to high operation safety,high capacity and rapid ion ***,the intrinsic low electron conductivity plagues the lifetime and cell performance of the ITMO negative *** we design a new carbon-emcoating architecture through single CO_(2)activation treatment as demonstrated by the Nb_(2)O_(5)/C *** structure engineering of the carbon-emcoating Nb_(2)O_(5)/C nanohybrid is achieved in terms of porosity,composition,and crystallographic *** carbon-embedding Nb_(2)O_(5)/C nanohybrids show superior cycling and rate performance compared with the conventional carbon coating,with reversible capacity of 387 m A h g(-1)at 0.2 C and 92%of capacity retained after 500cycles at 1 *** electrochemical mass spectrometry(DEMS) indicates that the carbon emcoated Nb_(2)O_(5)nanohybrids present less gas evolution than commercial lithium titanate oxide during *** unique carbon-emcoating technique can be universally applied to other ITMO negative electrodes to achieve high electrochemical performance.

摘要：计算机技术及网络的发展为教学提供了丰富的资源,在此基础上,积件思想被提出。积件是对传统课件的继承,同时也克服了传统课件的许多缺点。但目前人们对积件的认识仍停留在理论层面,实践中还没有得到很好的应用和推广。文章试图将程序设计中的“算法”思想应用到积件设计中。笔者认为,充分了解并应用“算法”的3种基本结构将有助于积件的设计。

摘要：　在文献[1]的基础上,讨论了多项式趋势曲线预测模型的参数估计方法,并用TurboC语言建立相应的软件进行了趋势曲线的预测与误差分析.