A real time expert system for anomaly detection of aerators based on computer vision and surveillance cameras

Aerators are essential and crucial auxiliary devices in intensive culture, especially in industrial culture in China. In this paper, we propose a real-time expert system for anomaly detection of aerators based on computer vision technology and existing surveillance cameras. The expert system includes two modules, i.e., object region detection and working state detection. First, we present a small object region detection method based on the region proposal idea. Moreover, we propose a novel algorithm called reference frame Kanade-Lucas-Tomasi (RF-KLT) algorithm for motion feature extraction in fixed regions. Then, we describe a dimension reduction method of time series for establishing a feature dataset with obvious boundaries between classes. Finally, we use machine learning algorithms to build the feature classifier. The proposed expert system can realize real-time, robust and cost-free anomaly detection of aerators in both the actual video dataset and the augmented video dataset. Demo is available at https://youtu.be/xThHRwu_cnI.     

辐射免疫学研究的某些进展

本文综述了辐射免疫效应研究中的若干进展,着重点是辐射免疫学与辐射致癌的关系。文中第一部分讨论了淋巴细胞的放射敏感性,强调淋巴细胞群体的异质性,不同淋巴细胞亚群及其亚组的相对放射敏感性,以及激活状态对淋巴细胞放射敏感性的影响。第二部分涉及免疫监视学说的要点,抗肿瘤免疫的特异和非特异成分,以及辐射对它们的影响。第三部分是关于辐射引起的免疫增强现象和辐射刺激作用在免疫系统的表现,并简述了著者实验室有关辐射刺激作用的某些资料。文章强调指出需要对低水平辐射对免疫系统和其它防御适应功能可能引起的刺激作用及其机制进行更细致的研究。     

国外升空战场侦察雷达评述

本文在讨论了战场侦察雷达升空的必要性及其性能要求以后,以空中平台为例,介绍了各国正在研制的各种升空战场侦察雷达系统的概况,并将各种空中平台(系留气球、旋翼式遥控飞行器、飞艇、直升机、无人机和固定翼飞机等)的性能进行比较。文章最后认为,旋翼式遥控飞行器将是第三世界国家适宜采用的一种空中平台。     

北约国家新型机载远程战场监视雷达系统发展概况

本文简述美国、法国和英国等三个北约成员国在90年代初期和中期服役的远程战场监视雷达系统的慨况.     

公路视频监控系统中角度采集电路的设计与仿真

本文针对公路监控系统设计了一种角度采集电路。采用单片机AT89S51对角度传感器进行数据采集,采用ADC0809进行A／D转换,采用LED数码管显示所采集的结果,并使用proteus对所设计电路进行了仿真验证。     

关于远程视频监控系统的研究

远程视频监控是监控系统中一个重要的组成部分，通过视频监控可以实现无人化管理，达到减员增效的目的。本文以广州市城区防洪排涝计算机监控中心为例，提出了一套经济有效的远程视频监控系统的解决方案。     

基于物联网的综合社会治安监控平台的研究

随着物联网技术的不断发展和应用,为解决当前的社会治安监控领域面临的各项问题提供了良好的契机。笔者以物联网技术在综合社会治安监控平台的应用研究为出发点,研究和探讨了在现有的安防系统基础上,以最小代价嵌入物联网技术,发挥统一接入、数据融合等优势,阐述了建设动态的监控资源管理和综合预警管理系统的可行性,为最终提升整体的社会综合管理和公共安全服务的水平提供了一种可行的方法。     

GEO轨道光学探测建模与仿真

GEO轨道是重要的轨道资源,针对现有光学探测手段对地球同步轨道的覆盖性问题,基于地球遮挡约束,地影约束,太阳光干扰约束、观测视场角约束、相对角速度约束建立了空间目标可见性模型.采用串行算法对模型进行求解和仿真.仿真给出了目标的可见时长及GEO轨道带的瞬时覆盖率.结果表明,现有的监视系统对地球静止轨道瞬时覆盖率同季节相关...     

基于半监督特征融合的监控视频场景识别研究

针对单模态特征条件下监控视频的场景识别精度与鲁棒性不高的问题,提出一种基于特征融合的半监督学习场景识别系统.系统模型首先通过卷积神经网络预训练模型分别提取视频帧与音频的场景描述特征;然后针对场景识别的特点进行视频级特征融合;接着通过深度信念网络进行无监督训练,并通过加入相对熵正则化项代价函数进行有监督调优;最后对模型分...     

Sousveillance: Communities of resistance to the surveillance environment

Facebook is often invoked in popular discourse as a device for the potential exploitation of individual privacy. Facebook users invite surveillance, and personal information revealed by Facebook users is compiled into aggregated databases of linked information, preferences, and behaviors. In the interest of the ideals of individual empowerment, cultural integrity, social responsibility and equality, social networking communities are forming to interrogate networked surveillance. This article examines those communities of resistance in the form of “sousveillance” tactics that have emerged as a backlash to the surveilled environment. Sousveillance is “watching from below,” a form of inverse surveillance in which people monitor the surveillors. Examples include citizen video, watchdog web sites, or the monitoring of authorities (corporations, military, government). Sousveillance embraces the idea of transparency as an antidote to concentrated power in the hands of surveillors. Sousveillance is used in Facebook itself to expose the data gathered by Facebook to the larger networked population. The surveillance sector’s responses to citizen resistance may ultimately alter the power dynamic between the watchers and the watched. Implications for this power dynamic are discussed through an exploration of Facebook sousveillance communities of resistance and how they are sustained in an effort to contribute to the larger examination of hegemonic practices in the global information society.