A new dimeric compound, [Zn(bpdc)(L)]2·4H2O(1, L = 11-fluoro-dipyrido[3,2-a:2',3'-c]phenazine and bpdc = 1,1'-biphenyl-2,2'-dicarboxylate),
提出的基于DTMF信号的智能手机外部攻击方法,可以在用户不被察觉,且与用户手机无交互情况下进行有效攻击。该方法对用户某些重要按键操作进行录音;然后对录音数据在时域上进行双阈值的端点检测,提取信号的有效区域;再将有效区域通过Goertzel算法转换到频域进行数字分类;对比通过比照DTMF编码表得到用户所有按键数据。实验结果表明,该方法在10 d B信噪比,且与用户手机无交互的条件下能破解80%以上的
The photodegradation mechanism of fenvalerate in water has been investigated by density functional theory(DFT).The geometries of reactants,transition states,int
Temperature dependent assembly of two novel Cd coordination polymers with the phen and H2 MIP ligands(phen = 1,10-phenanthrolion and H2 MIP = 5-methyl-isophthal