Preparation and dielectric properties of La doped NBCCTO ceramics

Journal of Electroceramics - CaCu3Ti4O12 ceramics have great dielectric constant, excellent temperature stability and good frequency stability. However, due to high dielectric loss, its practical...     

Search for New Opportunities Modification Raschig,Schiff, Andrusov,Hofmann, Colbe and Delepine Reactions

We explored new approaches to replace the nitrogen atoms of arsenic, antimony, bismuth, and discovered a new paths to modify Raschig, Schiff, Andrusov, Hofmann, Colbe, Delepine reactions with arsine, stibine and bismuthine in organometallic chemistry. We have proposed a new mechanism for possible reactions.     

轻量级加密算法mCrypton的不可能差分分析

物联网和RFID等设备的普及给密码学提出了新的要求,为了能够在资源受限的传感节点上实施通信保护和隐私保护,大量轻量级加密算法被提出.mCrypton是明文分组长度为64 bit的轻量级分组密码算法,共有3种可用密钥长度:64 bit、96 bit和128 bit.本文提出了针对mCrypton-96的4轮mCrypton不可能差分路径和7轮mCrypton的不可能差分分析,同时利用了mCryption 的S盒性质和密钥生成算法的弱点对不可能差分分析进行了改进,实验结果表明和传统的差分分析相比,本文提出的不可能差分分析方法降低了攻击的时间复杂度和数据复杂度.     

Thermocatalytic cracking of the natural bitumens of Kazakhstan

The heat treatment of the natural bitumens of Kazakhstan was carried out in the presence of a catalyst of power-generating ash microspheres and di-tert-butyl peroxide. Changes in the substantial and fractional compositions of cracking products depending on process conditions were established. Characteristic differences in the composition of liquid cracking products in the presence of the catalyst and the additive from the cracking products of the initial bitumen were found.