基于视频云的车辆大数据实战应用探索

随着云计算与大数据技术的发展,城市车辆综合治理有了新的发展机遇.以往依靠简单查询和人力投入的模式已不能满足各种复杂场景的需求,依托现有城市中各种电警、卡口收集的视频图片资源,结合深度学习、云计算等技术在图像方面的应用,提出了一套车辆大数据应用系统方案,该方案能在平台应用层实现车辆的实时监控、轨迹跟踪、预警预测等功能.此...     

血清4型禽腺病毒夹心ELISA检测方法的建立

为建立一种血清4型禽腺病毒（FAd V-4）夹心ELISA快速检测方法,本研究以FAdV-4多抗作为捕获抗体,FAdV-4 Penton蛋白单克隆抗体作为检测抗体,通过优化反应条件,建立了检测FAdV-4的夹心ELISA方法,对其进行特异性、敏感性、重复性检验和临床样品检测。方阵试验结果显示,FAdV-4多抗最佳稀释度为1∶2 000,单抗最佳稀释度为1∶32 000。该方法可特异性检测近年流行的高致病性FAdV-4毒株,而对之前的FAdV-4、其他血清型FAdV和常见禽病病原体不发生交叉反应。敏感性结果显示,该法对9.7×102TCID50/m L FAdV-4仍可检出。重复性结果显示,批内和批间试验的变异系数均小于5.0%。用建立的夹心ELISA方法与荧光PCR同时对100份肛口拭子样品进行检测,两者检测结果相符。上述结果表明,本研究建立的夹心ELISA检测方法特异性强、敏感性高、重复性好,可用于FAdV-4的大批量检测。     

一种端到端的基于ResNet的车辆检测追踪技术研究

视频中的车辆检测追踪是公安技术部门研究的重点.提出了一种端到端的基于ResNet模型的车辆检测追踪技术,ResNet模型中的残差单元能够对该网络提取到的车辆特征在多层网络之间高效传递,减少了因深度增加导致神经网络退化的问题,提高了对车辆检测的效率.实验结果表明,在对白天和夜晚两种环境下的视频进行车辆检测,其检测率分别为...     

猪肺炎霉形体膜蛋白抗体间接ELISA检测方法的建立

通过提取猪肺炎霉形体ATCC25095株膜蛋白,并用免疫亲和层析柱对膜蛋白进行纯化,经SDS-PAGE分析得到了分子质量分别为66、50、46、42、32和24 ku的6种膜蛋白。以纯化的膜蛋白为包被抗原,建立了检测猪肺炎霉形体抗体的间接ELISA检测方法。结果显示,纯化的抗原具有更好的重复性和敏感性,对临床检测样品的检出率高于IDX ELISA试剂盒。     

吸毒人员现场快速检测装备和查缉管控平台

当前禁毒工作形势日益复杂,大量隐性吸毒人员不在公安机关的查控范围内,成为社会安全的巨大风险隐患。科学准确的查缉、管控吸毒人员,能够有效推进禁毒工作。从吸毒人员的查缉管控出发,介绍了吸毒人员现场快速检测装备和查缉管控平台。基于毛发样本的吸毒人员现场快速检测装备具有快速、特异性强、灵敏度高、可追溯时间长的优势。吸毒人员查缉管控平台以大数据、人工智能为助力,能够实现禁毒工作的"智能预测、精准打击、智慧康复、互联网+帮扶"。     

陈惠民——在法医DNA检测平台国产化征程中不懈奋斗

<正>凝聚着广大公安科技工作者心血的法医DNA检测关键设备——"GA118-16A型"法医DNA检测平台,历经数年的研制开发,终于在2013年迎来了重要一刻:在这一年,该平台经过了严格的规模测试,经受住了实际应用的严峻考验,从而跨越了从实验室向实战应用的关键一步,这意味着我国法医DNA检测事业今后再也不受国外的掣肘,终于可以使用自己的关键设备了。     

网络环境下学生自主学习概率论能力的培养

自2019年末以来,新冠肺炎在全球具有大流行的特征,核酸检测是病患预防检测及确诊检测的重要技术之一.混采是大面积筛查时用到的常规核酸检测方式,几合一的混采方式关系到检测的效率和成本,是值得关注的问题.本文将用数学期望探讨新冠肺炎核酸检测混采分组人数问题,旨在培养学生借助网络自主学习、解决实际问题的能力,消除学生学习的畏...     

主被动结合式太赫兹人体安检技术及应用

面对当今日益复杂的安全威胁,太赫兹设备无疑可以在人体安检领域发挥重要的作用。分析了主动式和被动式太赫兹人体安检仪的国内外发展现状、性能指标、成像效果以及基本原理,分析总结了目前市场上主流设备的工作机制。基于一种实验设备分析了主被动结合式人体安检仪的实现方法、系统结构、图像融合和自身优势,为人体安检设备未来的发展方向提供参考。     

Capacity building of sea level and climate monitoring in the Pacific region： Fiji case study

In order to enhance capacity building in the Pacific region, and to raise awareness on climate change and sea level issues, teaching and training modules were made available to the Pacific community through the ＂South pacific sea level and climate monitoring project＂ funded by AusAID. Numerous training workshops have been conducted through the project since its inception in 1991 and the project is now in its fourth and final phase. It was hoped that the goals of capacity building for the stakeholders on correct information of climate change and sea level have been understood and taken heed of. In addition, ＂The scientific educational resources and experience associated with the deployment of Argo＂ （SEREAD） project was also set up especially for ocean science in the Pacific island schools in 2001. However, it has been realized that the data from this project is more relevant to tertiary level rather than to secondary level students. Consequently, a survey was carried out to gauge the students＇ outlook towards the physical side of marine science. The survey revealed that more than 80% of both tertiary level and high school non-physical science students decided not to take the physical aspect of marine science sighting reasons that it is either a difficult subject, boring, too hard to understand or difficult to pass in the examination. Even amongst students taking physical science, only about 50% believe that the physical aspect of marine science is enjoyable. A minority of students at USP and high school take science as a subject and a small proportion from them take the physical science. From this scenario, it can be predicted that there will be a shortage of physical science graduates in the future. The confidence of the Pacific community in the work of scientists is built on faith. They appreciate the effect of science on their lives and support it but are unaware of the scientific methods involved. Therefore, for the sustainability of physical aspect of marine science in the future for the Pacific region, public awareness of climate change and sea level is vitally important and it should be widely promoted in the community as a matter of urgency.