共查询到19条相似文献,搜索用时 152 毫秒
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1.前言马铃薯病毒病是影响马铃薯产量和质量的主要病害,并且数种病毒同时侵染,在生产中可继代相传,药剂无法防治,从而导致种性退化,造成产量大幅度下降甚至绝产。利用热处理和茎尖培养的生物技术脱除马铃薯主要病毒是行之有效的方法,而如何迅速检测确定无病毒植株是保证脱毒质量的关键。目前常规方法ELISA是根据抗原与其特异性抗体在离体条件下产生专一性反应的原理进行马铃薯病毒的诊断与测定。其特点是灵敏度高、特异性强,适宜于测定大量样品。近几年,我们对引进品种的微型薯及试管苗和本区马铃薯种薯(原原种、原种、一级… 相似文献
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分析了WEB页利用JavaScript和ActiveX技术更改注册表的原理,并在此基础上介绍了防治注册表被恶意WEB页攻击的方法。 相似文献
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本文简述了计算机病毒对武器系统的危害,探讨了武器系统中的计算机病毒防范问题。武器系统的病毒防治和对抗,需要从武器系统总体方案上虑考解决,从总体上做好计算机选型工作,建立安全入口,做好病毒检测工作。同时独立自主地研制新型系统软件,防止原系统软件嵌入病毒程序问题。加强硬件研制工作,建立国内标准,提高武器系统抗病毒能力,实现武器系统计算机病毒对抗。 相似文献
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基于表面等离子吸收的变色纳米传感器的工作原理是当颗粒聚集时,纳米颗粒溶液变换颜色,尤其是有害物质含量很少时,溶液依旧能变换颜色。此技术可以形成易用、便携的野战装备,能够准确和迅速地识别毒素、病毒和病菌。 相似文献
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什么是冠状病毒新华社北京消息据中国疾病预防控制中心编写的《传染性非典型肺炎防治问答》一书介绍,冠状病毒感染在全世界非常普遍,人群中普遍存在冠状病毒抗体,成年人高于儿童。各国报道的人群抗体阳性率不同,我国人群以往冠状病毒中和抗体阳性率在30%至60%,前苏联的抗体阳性率则在53%至97%。1965年,国外有科学家用人胚气管培养方法,从普通感冒病人鼻洗液中分离出一株病毒,命名为B814病毒。随后,又有科学家用人胚肾细胞分离到类似病毒,代表株命名为229E病毒。1967年,又有科学家用人胚气管培养从感冒病人中分离到一批病毒,其代表株是OC43株。1968年,科学家对这些病 相似文献
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分析了现阶段我国农村环境污染的主要特点,并对农村环境污染防治的宏观对策进行了系统性分析。由手农村污染严重、防治形势严峻且比城市环境污染情况复杂,在制定农村环境污染防治对策时,需要运用系统工程原理全方位、全过程分析实际情况,制定整体效果最优的系统化对策组合,并注意对策措施的系统性、协调性、连续性和针对性。 相似文献
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Fritz Nganje 《African Security Review》2017,26(3):271-287
While global consensus on the meaning and application of the responsibility to protect (R2P) principle remains tenuous, there is little contention among major actors that the development of the norm should prioritise the prevention of mass atrocities. In particular, Brazil, Russia, India, China and South Africa (BRICS) – which have a role to play that is vital to the future development of R2P as a global norm but which continue to express reservations about the intent and application of the doctrine – have been strong advocates of the preventive aspects of the principle. This rhetorical consensus, however, belies the conceptual and practical challenges that are associated with the prevention of mass atrocities. In this paper, the example of South Africa’s post-conflict reconstruction and development (PCRD) interventions in South Sudan from 2005 to 2013 is used to reflect on the role of external actors in supporting conflict-affected states to implement the preventive aspects of R2P. It is argued that while South Africa, like other BRICS countries, has used the rhetoric that atrocity prevention should be at the core of R2P to legitimise its opposition to military intervention for humanitarian purposes, it has struggled to back this rhetoric with coherent strategies and concrete actions to prevent mass atrocity crimes within its sphere of influence. The gap between rhetoric and practice in the preventive aspects of R2P is not unique to South Africa, but highlights fundamental difficulties inherent to global efforts to prevent mass atrocities. 相似文献
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李明 《中国人民武装警察部队学院学报》2011,27(5):94-96
在剖析解读日本街头犯罪"预防对策"的基础上,提出日本警察运用简单手段取得社会治安的理想效果。预防犯罪,在理念上把警方全包全责调整向组织牵头、协调联动和指导督促;在实践上完善警察牵头,以警察、政府相关部门、生产相关企业、新闻媒体和普通民众等广泛参与为基础的联动群防机制;在落实上不断加强高技术手段与原始方法相互补充的立体防范环境建设;在过程中尽量贴近现实需要,以完整的系统来控制街头犯罪,是降低预防犯罪成本、提高预防犯罪效率的捷径之一。 相似文献
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Yuki Abe 《Contemporary Security Policy》2016,37(1):62-88
Conventional constructivism presents conforming to normative expectations as a constituent force in state legitimacy. However, what is broadly considered appropriate is not necessarily realized since concrete action can collide with other norms, just as prevention of human rights violations is generally viewed as desirable, but related action provokes a debate over sovereign integrity and the use of force. This article argues that this ‘norm dilemma’ prompts states to develop international organizations. That is to say, if international mechanisms exist to deal with regional contingencies effectively, such dilemmas that accompany intervention are more likely to be pre-empted. For this reason, states move towards development of institutions for security management. This article examines this claim by analyzing North Atlantic Treaty Organization's (NATO's) reorganization through the intervention in Bosnia and explains why investigating norm dilemmas elucidates more aspects of this case than paying attention to the influence of humanitarian norms alone. Given the stress placed on conflict ‘prevention’ in NATO today, instead of promotion of intervention, as reiterated in the 2010 Strategic Concept, analysis of the first major crisis in post-Cold War Europe offers important insights into future management of norm dilemmas by the Alliance. 相似文献
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王凯 《装甲兵工程学院学报》1998,(3)
概述美国陆军现阶段实施的2010年发展战略规划,分析阐明美军制定和实行该规划理论基础和指导方针,陆军结构调整与改革的思路和实施的内容,在军队建设上如何充分发挥科学技术优势等. 相似文献
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单兵综合作战系统是一种新型的武器系统,对其效能评价技术的研究具有重要的意义.首先讨论了效能概念的意义,分析了两种主要的效能评价方法的适用性,指出幂指数方法在评价单兵综合作战系统作战效能方面有其优越性.在分析系统的组成、作战任务的基础上,建立了评价系统效能指数的指标体系,并且提出了指标的量化方法.针对在论证阶段的数据特点,给出了系统效能指数的具体计算模型. 相似文献
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手性吸波混凝土电磁屏蔽性能实验研究 总被引:2,自引:0,他引:2
综述了手性吸波的研究现状。在实验中进行了手性吸波混凝土的制备,测试了实验样品的电磁屏蔽性能。结果表明,手性吸波模型是混凝土吸波的完整理论,对混凝土的高吸波性能、高屏蔽性能、宽频性能的研究提供了理论基础,为先进吸波混凝土的研制开辟了新途径。 相似文献
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宁德文 《中国人民武装警察部队学院学报》2003,19(5):47-49
按照国家教育部关于研究生教学要求 ,探讨武警学院边消警部队政工学研究生教学的政策依据 ,研究生教学的科学性和必要性以及研究生教学的可行性 ,并论述了武警学院边消警部队政工学研究生教学的专业特点、参考培养方案及要求等。 相似文献
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Issaka K Souaré 《African Security Review》2013,22(3):96-97
The popular adage has it that ‘prevention is better than cure’. Given the heavy and enduring costs of armed conflicts, there is no disputing the fact that making efforts to prevent them from breaking out in the first place is better than waiting until it is too late. This entails two things: conflict prevention measures and early warning systems. Anything that could be done to effectively address the root causes of a conflict before it turns violent may fit into the former, while the latter aims to identify threats to these elements so that effective conflict prevention measures can be taken. In other words, ensuring ‘human security’ is the thrust of the former, while the latter serves as a surveillance camera for any deficit in providing the different components of this ‘human security’. It is with these two important issues that this essay deals, with particular reference to West Africa. 相似文献