Molecular dipole moments computed at the levels of HF/STO-3G, HF/6-31G(d, p), HF/6-311+G(2d, 2p), MP2/6-31G(d, p) and MP2/6-311+G(2d, 2p) have been investigated. HF/6-311+G(2d, 2p) was found to be the relatively good ...Molecular dipole moments computed at the levels of HF/STO-3G, HF/6-31G(d, p), HF/6-311+G(2d, 2p), MP2/6-31G(d, p) and MP2/6-311+G(2d, 2p) have been investigated. HF/6-311+G(2d, 2p) was found to be the relatively good choice to compute MKS charges for reproducing the experimental values of molecular dipole moments. Root mean square deviation of computed dipole moments for 21 small polar molecules is about 0.1969 D.展开更多
在IEEE 802.15.6国际标准基础上,对无线体域网WBAN(wireless body area networks)的移动安全服务进行了研究。在安全协议中采用节点标识码取代节点地址,支持了节点的移动安全。另外以时间戳代替随机数,防止了消息重播。通信双方建立一...在IEEE 802.15.6国际标准基础上,对无线体域网WBAN(wireless body area networks)的移动安全服务进行了研究。在安全协议中采用节点标识码取代节点地址,支持了节点的移动安全。另外以时间戳代替随机数,防止了消息重播。通信双方建立一个共享主钥MK(master key),使用MK建立成对临时钥PTK(pairwise temporal key),进行帧的认证与加密通信,有效保证了消息(数据)的安全,提供了节点的移动安全服务。给出了MK、PTK建立的改进过程及其详细流程图。展开更多
基金The project was supported by the National Science Foundation (29773021) Provincial Educational Foundation of Jiangsu (98KJB150001).
文摘Molecular dipole moments computed at the levels of HF/STO-3G, HF/6-31G(d, p), HF/6-311+G(2d, 2p), MP2/6-31G(d, p) and MP2/6-311+G(2d, 2p) have been investigated. HF/6-311+G(2d, 2p) was found to be the relatively good choice to compute MKS charges for reproducing the experimental values of molecular dipole moments. Root mean square deviation of computed dipole moments for 21 small polar molecules is about 0.1969 D.
文摘在IEEE 802.15.6国际标准基础上,对无线体域网WBAN(wireless body area networks)的移动安全服务进行了研究。在安全协议中采用节点标识码取代节点地址,支持了节点的移动安全。另外以时间戳代替随机数,防止了消息重播。通信双方建立一个共享主钥MK(master key),使用MK建立成对临时钥PTK(pairwise temporal key),进行帧的认证与加密通信,有效保证了消息(数据)的安全,提供了节点的移动安全服务。给出了MK、PTK建立的改进过程及其详细流程图。
