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为了改善单帧图像检测复杂背景中车道线性能较差问题,例如车道线受到阴影影响、污渍污损或人车遮挡等情况时性能较差的问题.本文提出了一种基于连续帧的车道线检测网络,实现了卷积神经网络(Convolutional Neural Network,CNN)和长短期记忆网络LSTM(Long Short-Term Memory,LS... 相似文献
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在速调管的制管过程中,加大谐振腔尺寸及调整漂移管间距两种手段都能将原高端谐振腔工作频率调整到低端工作频率,但不同的调整方法对腔体特性阻抗的影响不同.本文通过对C波段大功率多组多注速调管的研制,分析对比了这两种方法对腔体特性阻抗及输出特性的影响.同时,对一定的工艺手段抑制测试振荡的方法进行了探讨. 相似文献
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通过美国标准和技术研究所开发的软件程序计算出了混合工质在不同配比下的物理性质;最终以要求的制冷量为标准,确定了混合工质的最佳配比;并通过分析计算,得出了一个三级自动复叠系统中各测点的状态参数;最后分析了压缩机高、低压对系统性能的影响。 相似文献
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We show two external cavity-enhanced second-harmonic generations of 922 nm with periodically poled potassium titanyl phosphate crystal,whose doubling cavities are locked separately with Hansch-Couillaud and intra-modulation methods.The outputs of second-harmonic generation reach 310 mW,54.8%of the conversion efficiency from the Ti:sapphire laser with the crystal length of 10 mm,and 208 mW,59% of the conversion efficiency from the MOPA system with the crystal length of 30 mm.It consists of heterodyning the Ti:sapphire laser and the MOPA system,and compares the phase of the beat frequency signal with the phase of a reference RF local oscillator.The resulting phase error is used as a feedback signal and fed back to the reference cavity of the Ti:sapphire laser to lock the two lasers in phase.A stable blue power of 520 mW is obtained,which supplies enough power for the cooling and trapping step of the strontium (Sr)optical lattice clock.Four stable isotopes of Sr, 84 Sr, 86 Sr, 87 Sr,and 88 Sr,are detected by probing the laser during a strong 460.7-nm cycling transition(5s 21 S0?5s5p 1 P1). 相似文献