on quadratic bent functions in polynomial forms

In this correspondence, we construct some new quadratic bent functions in polynomial forms by using the theory of quadratic forms over finite fields. The results improve some previous work. Moreover, we solve a problem left by Yu and Gong in 2006.

incomplete exponential sums over galois rings with applications to some binary sequences derived from z(2l)

IEEE Computer Society

无线多跳网中具有网络编码意识的机会路由协议

针对现有COPE协议消极编码的问题,提出一种具有网络编码意识的机会路由协议NCAOR。该协议兼取机会路由和网络编码的优势实现高效地报文投递。在每一跳转发时,节点均选取多个冗余邻居节点构成机会节点集协助数据发送。收到报文后,机会节点利用局部拓扑知识和侦听的邻居报文接收信息判断转发报文的网络编码机会,并通过综合路径距离和编码收益的效用函数评估报文转发效能,智能设置转发响应时间。仿真结果表明,该协议相对采用最短路径路由的COPE方案具有网络吞吐量大、能耗低和节点编码机会更多的优点。

Predicting the position of the spin-forbidden band for Tb3+ ions in crystal hosts

The energy difference DeltaE between the spin-allowed and spin-forbidden states of Tb3+ in crystals is studied. The environmental factor he representing the character of the host is redefined by using the chemical band of complex crystals. The relationship between h(e) and DeltaE is found to be a linear relation. The results show that the energy difference between the spin-forbidden and spin-allowed states for Tb3+ ions in crystals can be predicted from the environmental factor.

LIFETIMES OF RYDBERG LEVELS IN THE PERTURBED 6SNP P-1,3(1) SERIES OF YBI

Using two methods: (1) three-step excitation and (2) single UV photon excitation in an atomic beam with direct observation of the decay of the fluorescence light, we have measured the lifetimes of the Rydberg levels of YbI belonging to the perturbed series 6snp J = 1 levels. The measured values have been interpreted by the multichannel quantum defect theory (MQDT).