共查询到19条相似文献,搜索用时 125 毫秒
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VDS是专门解决复杂系统网络安全问题的。它率先解决了网络环境下难以高速准确检测病毒的全球性难题,以旁路方式接入网络,能够实时监测网络环境中的病毒疫情,全高检测各种网络病毒的扫描、传输、攻击等行为,定位病毒的来源,测量病毒产生的网络压力。并准确提供病毒类别、病毒名称、病毒变种、病毒危害级别等全面信息,形成网络病毒的全局视图。 相似文献
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本文利用免疫电镜技术准确地检出带有甜菜坏死黄脉病毒的病株,从而正确评价甜菜丛根病防治效果,对甜菜黑色焦枯病毒进行了免疫电镜形态学观察并证实了抗血清制备试验效果良好。 相似文献
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计算机病毒分析与防范的研究 总被引:1,自引:0,他引:1
当前,对信息领域构成极大威胁的是计算机病毒和木马。首先对计算机病毒和木马的生产、伪装等进行了详细的论述,其次研究了病毒的相关技术手段以及行为,进一步通过病毒例证详细分析、揭示了病毒产生的本质,最后针对病毒所采取的新的破坏手段加以预测和剖析,并提出了对预防病毒入侵的建议和解决方案。 相似文献
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针对蠕虫病毒通常只能感染特定操作系统的特点,该文研究了多操作系统异构网络中的病毒传播规律及安全性能优化策略。首先,考虑多数病毒仅限在同种操作系统之间的链路中传播,在SIRS病毒传播模型中引入异构边比例参数,通过系统平衡点求解和基本再生数分析,研究异构边对单系统病毒传播和网络安全性能的影响。其次,按照动态目标防御思想和技术,设计了非异构边随机中断、非异构边随机重连和单操作系统节点随机跳变3种网络安全优化策略,分析了3种策略下异构边比例和基本再生数的变化及其对网络安全性能的影响。最后仿真验证了病毒传播模型的正确性和3种策略的网络安全性能优化效果,同随机中断和随机隔离策略对比,分析其对网络安全性能和网络业务承载能力的影响。 相似文献
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Chaewon Park Eunjung Kim Geunseon Park Byoung Choul Kim Srivithya Vellampatti Jong-Woo Lim Sojeong Lee Soohyun Chung Sung-Hoon Jun Sangyoon Lee Sajid Ali Minjoo Yeom Daesub Song Seungjoo Haam 《Advanced functional materials》2023,33(31):2214603
The emergence of fatal viruses that pose continuous threats to global health has fueled the intense effort to develop direct, accurate, and high-throughput virus detection platforms. Current diagnostic methods, including qPCR and rapid antigen tests, indicate how much of the virus is present, whether small fragments or whole viruses. However, these methods do not indicate the probability of the virus to be active, capable of interacting with host cells and initiating the infection cycle. Herein, a sialic acid-presenting fusogenic liposome (sLipo–Chol) nanosensor with purposefully modulated membrane rigidity to rapidly detect the fusion-competent influenza A virus (IAV) is developed. This nanosensor possesses virus-specific features, including hemagglutinin (HA) binding and HA-mediated membrane fusion. It is explored how the fusogenic capability of sLipo–Chol with different membrane rigidities impacts their sensing performance by integrating Förster resonance energy transfer (FRET) pairs into the bilayers. The addition of an intact virus led to instant FRET signal changes, thus enabling the direct detection of diverse IAV subtypes—even in avian fecal samples—within an hour at room temperature. Therefore, the sensing approach, with an understanding of the cellular pathogenesis of influenza viruses, will aid in developing bioinspired nanomaterials for evolution into nanosystems to detect infection-competent viruses. 相似文献
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Win32 PE文件格式是微软视窗操作系统的标准可执行文件格式,由于Windows操作系统的广泛使用,Win32 PE病毒已经成为当前危害计算机安全的主要病毒之一,文中针对广泛传播的Win32 PE病毒,首先对Win32 PE文件结构进行分析,然后对病毒感染原理进行深刻详细解析,最后有针对性地提出对病毒检测的多种有效策略,从而为防毒、杀毒提供必要的理论依据. 相似文献
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在SEED-DVS6467T的硬件基础上,实现了8路模拟视频的实时采集并对采集到的视频分别进行标清和高清的实时显示的应用程序设计。实验结果显示,视频采集和回放性能稳定且实时性良好,高清视频回放与标清视频相比具有更高的清晰度和更广阔的视野。 相似文献
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Computers and epidemiology 总被引:9,自引:0,他引:9
Analogies with biological disease with topological considerations added, which show that the spread of computer viruses can be contained, and the resulting epidemiological model are examined. The findings of computer virus epidemiology show that computer viruses are far less rife than many have claimed, that many fail to thrive, that even successful viruses spread at nowhere near the exponential rate that some have claimed, and that centralized reporting and response within an organization is an extremely effective defense. A case study is presented, and some steps for companies to take are suggested 相似文献
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O. Hayden P.A. Lieberzeit D. Blaas F.L. Dickert 《Advanced functional materials》2006,16(10):1269-1278
Molecular imprinting has become an increasingly popular method for the design of artificial antibodies against a variety of analytes, and especially as a method for detecting viruses and proteins. Self‐assembly of a virus on a stamp enables us to generate patterns on a polymer. Combined with mass‐sensitive transducers, the reinclusion of viruses, such as the tobacco mosaic virus (TMV), the human rhinovirus (HRV), and the parapox ovis virus (PPOV), into the patterned polymer layer can be followed directly. Recognition is favored by a geometrical fit between the analyte and the patterned layer, as well as by noncovalent interactions; the former can be observed by the highly selective enrichment of rod‐shaped TMV and globular HRV on their respective imprints, showing only negligible cross‐sensitivity. The latter is demonstrated by the selective incorporation of different HRV serotypes (HRV‐1a and HRV‐16) that have the same geometric dimensions but nonetheless are clearly distinguished from each other. Similar behavior is observed with protein molecules that are about one order of magnitude smaller than viruses, having molecular dimensions of a few nanometers. When using proteins for imprinting, the resulting materials usually preferably incorporate into their own template. 相似文献