LVS中一种负载调度策略的设计与实现

本文分析了LVS中的各种负载调度策略,针对其不足之处提出了一种新的动态负载调度策略.该策略以单位时间流量为依据,对服务器健康状况进行分级,并根据连续检测的结果在各级之间进行转换.     

基于支持向量机的高分辨距离像分类法

雷达高分辨距离像(HRRP)识别,是军事目标识别的一个重要手段.支持向量机(SVM)具有良好的泛化能力,适用于小样本学习问题.本文针对3类飞机目标的HRRP数据,构造了SVM分类器,设计了2组实验以比较SVM与最大相关系数法(MCM)的泛化能力、识别速度和抗噪能力.实验结果表明,SVM在军事目标HRRP分类方面具有良好的应用前景.     

高校图书馆信息化建设中的难点与应对策略

高校是我国培养高素质专业人才的重要单位,而图书馆则是全校师生实现自我提升的关键场所。为更好地满足高校全体师生的自主学习需求,应做好高校图书馆信息化建设,借助先进的信息化技术,满足全体师生在图书馆中的合理需求,进一步提高校内师生的学习效率。基于对高校图书馆重要性的考虑,文中分析了高校图书馆信息化建设中的问题及对策,以期提高高校图书馆信息化建设水平,更好地发挥出图书馆在高校办学中的作用。     

基于攻防博弈模型的网络安全测评和最优主动防御

文中对攻防博弈模型中的相关内容展开了分析,讨论了攻防博弈模型的网络安全测评要点,包括信息安全测评分析、主动防御系统分析、脆弱性测评分析、防御代价定量分析等,并对攻防博弈模型的最优主动防御要点进行了整理,旨在提高对攻防博弈模型应用价值的认知水平,提升网络安全测评与防御的效果。     

基于AR技术的光交箱资源校准技术

光交箱端口状态对通信网络的正常运行具有重要作用,由于光交箱内部布线杂乱,容易对端口产生排线遮挡问题,导致传统的光交箱端口图像识别操作不便。文中提出了一种基于AR技术的光交箱资源校准技术,该技术可以对实时视频自适应选取关键帧,然后对关键帧进行光交箱端口状态和文字识别,最后返回加权融合后的识别结果,并利用实时AR交互指引巡检人员处理被遮挡端口,这不仅能提升巡检人员的工作效率,还能提高实时识别准确率。将该校准技术应用到光交箱端口的智能检测中,能对光交箱的端口识别提供极大便利。     

Research on wind turbine blade damage based on pre-stressed FBG strain sensors

One of the essential parts of a wind power generator that captures wind energy is the wind turbine blade. The safety of the blades rapidly declines as a wind turbine''s operating period grows. For real-time monitoring, a chip-type pre-stressed fiber Bragg grating (FBG) strain sensor was fabricated. The sensor''s structure was improved using simulation analysis along with optimization. It was discovered through calibration trials that the pre-stressing method expanded the sensor''s range of measurement, guaranteed overall linearity, and prevented the potential hysteresis phenomena during compression. The sensor''s final sensitivity was calculated to be 1.970 pm/με, and its linear fitting coefficient was 0.999. Finally, the sensor was used to monitor the wind turbine blades and the strain change curve of the root of a normally functioning blade is found to be a sine curve, which provides a certain reference value for judging whether the blade is damaged in the future.     

Dual-band reflective polarization converter based on metasurface

In this paper, a dual-band and reflective polarization converter based on metasurface is proposed. Its unit cell is composed of two layers of metal plates separated by a dielectric substrate. The simulation results show that the proposed converter is able to convert x- or y-polarized incident waves into cross-polarized waves perfectly in frequency bands of 6.75—10.59 GHz and 17.78—19.61 GHz, and the polarization conversion ratio (PCR) is nearly 100%, which can also convert linearly polarized waves into circularly polarized waves at four frequencies. It can be widely used in applications of radar satellites, antenna design and telecommunication with the function of realizing polarization conversion in two bands and achieving high PCR simultaneously.     

关于正馈线电缆绝缘状态检测方法探讨

AT供电方式在电化区段应用较普遍,许多隧道采用正馈线电缆供电.现缺乏有效的检测手段,一旦电缆发生故障,恢复时间长,对运输影响大.对正馈线电缆结构、铠装层屏蔽层接地方式、电缆试验方法等进行论述,通过现场实际测试数据进行验证.结合实际,指导性给出接地电流与电缆绝缘状态定量关系,提出现场测试电缆接地电流方法.