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多机型航班恢复问题研究 总被引:1,自引:0,他引:1
主要研究了基于航班延误时间最短的航班行程规划问题,分别建立了最基本的多机型航班恢复问题模型、考虑旅客行程重新规划的航班恢复问题模型.在约束条件下,先在单机型航班恢复的基础上考虑多机型航班恢复,最后考虑基于飞机载客量的多机型航班恢复.构建时空网络模型,结合改进的分支定界法和启发式算法,确定筛选范围,调整不同的影响范围,达到较优的结果.对于多机型航班恢复问题,得到航班总延误时间为12850分钟.接着分析考虑飞机载客量的多机型航班恢复问题,分析建立的模型得到航班总延误时间为约1886650分钟.建立的模型有较好的鲁棒性,且具有较好的实用性. 相似文献
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Phonon-Assisted Resonant Tunnelling through a Triple-Quantum-Dot: a Phonon-Signal Detector 下载免费PDF全文
We study the effect of electron-phonon interaction on current and zero-frequency shot noise in resonant tunnelling through a series triple-quantum-dot coupling to a local phonon mode by means of a nonperturbative mapping technique along with the Green function formulation. By fixing the energy difference between the first two quantum dots to be equal to phonon frequency and sweeping the level of the third quantum dot, we find a largely enhanced current spectrum due to phonon effect, and in particular we predict current peaks corresponding to phonon-absorption and phonon-emission assisted resonant tunnelling processes, which show that this system can be acted as a sensitive phonon-signal detector or as a cascade phonon generator. 相似文献
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We investigate the nonlinear thermal transport properties of a single interacting quantum dot with two energy levels tunnel-coupled to two electrodes using nonequilibrium Green function method and Hartree-Fock decoupling approximation. In the case of asymmetric tunnel-couplings to two electrodes, for example, when the upper level of the quantum dot is open for transport, whereas the lower level is blocked, our calculations predict a strong asymmetry for the heat (energy) current, which shows that the quantum dot system may act as a thermal rectifier in this specific situation. 相似文献
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