排序方式: 共有7条查询结果,搜索用时 15 毫秒
1
1.
2.
3.
4.
Femtosecond laser-induced Cu plasma spectra at different laser polarizations and sample temperatures 下载免费PDF全文
Yitong Liu 《中国物理 B》2022,31(10):105201-105201
Laser-induced breakdown spectroscopy (LIBS) is a good technique for detecting and analyzing material elements due to the plasma emission produced by the high-power laser pulse. Currently, a significant topic of LIBS research is improving the emission intensity of LIBS. This study investigated the effect of laser-polarization on femtosecond laser-ablated Cu plasma spectra at different sample temperatures. The measured lines under circularly polarized lasers were higher than those under linearly and elliptically polarized lasers. The enhancement effect was evident at higher Cu temperatures when comparing the plasma spectra that have circular and linear polarizations for different target temperatures. To understand the influence of laser-polarization and sample temperature on signal intensity, we calculated the plasma temperature (PT) and electron density (ED) . The change in PT and ED was consistent with the change in the atomic lines as the laser polarization was being adjusted. When raising the Cu temperature, the PT increased while the ED decreased. Raising the Cu temperature whilst adjusting the laser-polarization is effective for improving the signal of femtosecond LIBS compared to raising the initial sample temperature alone or only changing the laser polarization. 相似文献
5.
算网融合是未来移动通信网络的发展趋势,面向未来更高实时性的业务需求,6G无线网络需要实现通信与计算的深度融合。一种可能的模式是基站内部具有计算资源,并高效协同调配通信与计算资源。随着基站部署规模的增大、计算业务量的逐步增加,计算资源的能耗问题将成为6G无线网络节能的潜在问题。调研发现,目前无线通信网络的节能方案大多针对通信业务,对计算资源的节能方案研究相对较少,未来6G无线网络则需要同时考虑通信业务与计算业务,将能效作为基站进行通算资源协同分配的优化目标之一。考虑到方案具有动作空间较大、动作输出为离散确定值的特性,提出了一种基于强化学习的6G基站通算资源协同分配方案,并对系统能耗进行了建模,方案奖励由业务特征、基站接入用户情况等信息确定,同时对比了智能模型的迭代优化频次对方案性能的影响。在多小区通信环境下进行了仿真,结果表明,该方案可以在满足业务性能需求(含基站执行业务的时延、RSRP等)的前提下,将系统能耗节约46.98%,并且,所采用的智能模型通过高频样本提供和迭代优化可以获得更优的性能。 相似文献
6.
多光谱辐射测温技术具有不干扰被测场、测量无上限以及响应速度快等优点,是高温测量领域的最有力工具之一。目前,多光谱高温计以点温测量为主,光路通过物镜、光阑、棱镜等光路通道将待测点辐射分光后进入探测器阵列,实现单点的多光谱信息采集。随着工业智能化程度的不断提高,更加需要实时获得大量的温度分布信息,如特种金属材料的冶炼过程、高温合金激光自动焊接过程、半导体晶体生长过程、火箭发动机尾喷焰温度诊断等领域都需要实时获得某条线乃至整个二维表面的温度,从而提高产品性能和质量,因此通过多光谱辐射测温技术测量待测表面某条线的温度分布十分重要。但是,简单将光阑变为狭缝,实现待测线表面的辐射经透镜、棱镜等传统光路分光后,由于光学系统球差的作用,会使得分光后的狭缝光谱由于离轴传输而呈现严重的弯曲现象,不利于矩形光电探测器阵列的完全接收。为此,提出基于正交柱状透镜组的多光谱线温光路系统,利用正交柱状透镜在不同位置成像可以实现由圆到椭圆再到直线的特殊作用,较好地解决了传统多光谱辐射高温计光路所存在的球差问题。利用ZEMAX光学设计软件,基于S4111-16Q的光电探测器阵列实际大小进行反向光学系统设计,确定了狭缝、... 相似文献
7.
1