Binding Energy of D^- and D^0 Centers Confined by Spherical Quantum Dots

We study a negative donor center, a neutral donor in a spherical Gaussian potential quantum dot by using the matrix diagonalization of Hamiltonian within the effective-mass approximation. We calculate the energy E（ D^-） as functions of Gaussian potential size and depth, the same calculations as performed with the parabolic approximation. The dependence of the ground state of the neutral shallow donor and the negatively charged donor on the dot size and the potential depth is investigated.

关于城市边界智能交通卡口监测系统建设的思考

随着计算机技术、视频识别技术的发展,并结合先进的激光检测技术、网络通信技术,设计建设一个智能化、一体化的智能交通卡口监测系统,系统对进出城市主要道路的车辆进行实时监测,通过号牌识别、数据比对,实现对黑名单车辆的实时报警查控,为公安机关及时掌握交通状况动态变化信息,为交通指挥调度提供有效依据,为营造良好的交通秩序提供了新的技术手段。