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网络舆情与非常规突发事件作用机制——基于系统动力学建模分析 总被引：3，自引：2，他引：1
非常规突发事件因其爆发性、演变不确定性、群体扩散性等特点备受学者们关注.随着互联网技术的发展与互联网应用的普及,网络作为非常规突发事件信息传播的载体和平台,令英信息传播更迅速,也使事件影响力剧增.利用系统动力学建模认识非常规突发事件涨落规律是一个新的研究角度,其能够分析系统中作用主体之间相互影响关系,以及相关因素的作用力大小,从而探究事物自身演化机理,找寻规律,为控制非常规突发事件网络舆情扩散,引导非常规突发事件舆情传播提供有力依据. 相似文献
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随着互联网的高速发展,作为事件信息传播平台的网络舆情开始对非常规突发事件的发展产生越来越大的影响。进入21世纪,非常规突发事件的频繁发生使人民的生命财产遭受了巨大的损失。政府通过正确的渠道和方式,把握和引导非常规突发事件的网络舆情,对于事件的处理显得尤为重要。根据非常规突发事件的一般定义分析其特征,详细研究网络舆情的形成机理及影响其演化的要素,描述非常规突发事件网络舆情产生的潜在影响,结合政府现阶段处理非常规突发事件网络舆情的方法,找出其中存在的主要问题,并提出几点建议为政府日后处理非常规突发事件的网络舆情提供参考。 相似文献
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网络舆情传播阶段精细化建模与仿真研究 总被引：1，自引：0，他引：1
[目的/意义]根据信息生命周期理论,研究网络舆情传播的周期性规律,构建网络舆情传播阶段的精细化模型,使政府在面对复杂多变的网络舆情态势时,能够准确把握舆情发展演化趋势。[方法/过程]通过案例定性分析网络舆情传播的周期性规律,构建网络舆情传播的Logistic模型,根据模型分析得出网络舆情传播的4个关键时间节点以及5个传播阶段,然后基于MATLAB开展模型仿真,研究了3个参数对网络舆情传播的影响程度并应用实例验证了模型。[结论/结果]经过理论建模和实证分析得出本文构建的网络舆情传播阶段精细化模型是可行的,以上理论研究可为政府准确把握网络舆情演化规律,制定网络舆情治理对策提供参考依据。 相似文献
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[研究目的]针对突发事件中多种网络舆情信息交互传播的现象，构建双网络舆情信息交互传播SE2I2R2模型并仿真分析其传播演化趋势及影响因素，为及时高效开展多网络舆情的引导干预工作提供有益指导。[研究方法]在传染病SEIR模型的基础上，通过量化舆情信息的吸引力和相关性因素，构建复杂网络上的双网络舆情信息交互传播SE2I2R2模型，并在真实社交网络Facebook数据集上进行仿真分析，揭示双网络舆情交互传播的演化规律。[研究结论]仿真结果表明，当舆情信息相互冲突(强负相关)时，有优先权的舆情信息具有明显的传播优势；当舆情信息呈正相关时，舆情传播个体之间持续发生着状态转移，舆情传播演化至稳态的时间(弛豫时间)显著延长，且人群接纳程度显著提升；当舆情信息吸引力差距较大时，强势舆情信息对弱势舆情信息的传播产生较显著的抑制作用。 相似文献
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【目的/意义】通过识别影响在线医疗信息服务质量的敏感因素,为互联网在线医疗信息服务企业实现技术与服务创新提供理论与实践依据,进而提升用户在线医疗信息服务质量。【方法/过程】以问卷调查法与专家访谈法等为基础融合信息增益理论分析各影响因素与在线医疗信息服务质量高低的关联程度,进而以提取的关键影响因素构建在线医疗信息服务质量关键影响因素模型,最后通过SVM构建在线医疗信息服务质量预测模型。【结果/结论】影响在线医疗信息服务质量的20个关键影响因素集中在信息生态的四个重要维度,即信息、信息任、信息技术与信息环境四个维度上,模型88.43%的预测精准度说明SVM对在线医疗信息服务质量具有可靠的预测能力。 相似文献
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【目的/意义】非常规突发事件的爆发会带动舆论信息的传播,本文旨在揭示网络舆情驱动下突发事件的演化机理,为有关部门及时采取应急救援活动、有效控制舆情蔓延提供依据。【方法/过程】运用知识元表示法描述突发事件的情景状态、应急活动、孕灾环境和承灾体四种要素,构建基于动态贝叶斯网络的情景推演模型,并以沈阳非洲猪瘟事件为例,建立网络舆情驱动下突发事件情景网络结构,通过动态贝叶斯网络直观呈现情景演化过程。【结果/结论】研究结果表明,情景推演模型在时间推理与事件发展的顺序上与突发事件演化过程基本一致,通过应急活动扰动分析,证实知识元表示和动态贝叶斯网络方法的有效性,为舆情引导提供一定的参考。 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):13-14
Aresearch project on the greenhouse cultivation of Swertia chirayita Buch Ham, a popular herbal drug used by the Tibetan people against liver and gallbladder diseases, recently passed the acceptance check by a panel of experts under the auspices of Qinghai Provincial S＆T Bureau. The feat was accomplished by researchers from the Lanzhoubased CAS Northwest Institute of Plateau Biology. 相似文献
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The research into the origins of domestic animals is of significance not only for understanding their development per se but also for making clear the human society evolution. Although there are evidences to show that pigs were independently domesticated in a variety of places throughout the world the detailed scenario of the origin dispersal of domestic pigs in East Asia remains unclear.…… 《中国科学院院刊(英文版)》2008,22(1):7-7
The research into the origins of domestic animals is of significance not only for understanding their development per se, but also for making clear the human society evolution. Although there are evidences to show that pigs were independently domesticated in a variety of places throughout the world, the detailed scenario of the origin and dispersal of domestic pigs in East Asia remains unclear. 相似文献
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Among the galaxy of research development organizations in northwest Beijing's Zhongguancun district known as China's Silicon Valley two are especially well-known to IT researchers: Microsoft Research Asia 《中国科学院院刊(英文版)》2008,22(1):47-49
Among the galaxy of research and development organizations in northwest Beijing＇s Zhongguancun district, known as China＇s Silicon Valley, two are especially well-known to IT researchers： Microsoft Research Asia （MSRA）, and, within a few blocks on the other side of the street, the CAS Institute of Automation （CASIA）. While most people in Chinese scientific organizations strive to move to a large foreign counterpart, Dr. Stan Z. Li （LI Ziqing） moves against the stream. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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《中国科学院院刊(英文版)》2008,22(1):58-58
As a key component of the national initiative for basic S＆T data and infrastructure development, a nationwide survey on the lake water quality, volume and bio-resources has recently been kicked off. The move marks the systematic implementation of the secondround investigation of the country＇s lacustrine resources. 相似文献
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Bats the only mammals known to possess the real ability to fly have fascinated zoologists for a long time with their long-distance migration. How do they find their way home from an altitude of kilometers above sea level where their stunt of ultrasonic echolocation does not work?…… 《中国科学院院刊(英文版)》2008,22(1):3-4
Bats, the only mammals known to possess the real ability to fly, have fascinated zoologists for a long time with their long-distance migration. How do they find their way home from an altitude of kilometers above sea level, where their stunt of ultrasonic echolocation does not work？ Recent discoveries supported the theory that bats might be able to use magnetic clues to figure out their own position,just like what birds do. However, the latest results from a joint study by a group of researchers from the CAS, East China Normal University and University of Auckland reveal that bats apply an interesting strategy different from the one underlying birds＇ orientation technique, though they both are believed to derive information about their position from the subtle changes in the magnetic field of the Earth. 相似文献
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《中国科学院院刊(英文版)》2014,(3):252-252
<正>On February 12,2014,the international academic journal Cancer Research published an article online entitled"Latency Associated Nuclear Antigen of Kaposi's Sarcoma Associated Herpesvirus Promotes Angiogenesis through Targeting Notch Signaling Effector Hey1",as a result from the research conducted by Prof.LAN Ke’s lab at the Institut Pasteur of Shanghai,Chinese Academy of Sciences. 相似文献
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SONG Jianlan 《中国科学院院刊(英文版)》2014,(3):217-220
<正>Scientists from CAS and the Max Planck Society(MPG)met on May 13,2014 in Beijing to celebrate their four-decade-long ST cooperation and cherished friendship,anticipating further development of the bilateral relation.This partnership formally began four decades ago with a visit paid by then MPG President,Prof.Lüst to CAS,introduced CAS President BAI in his address at the celebration:"During the visit,CAS and MPG confi rmed the basic principles of cooperation,that is equality and mutual benefi ts for both sides,and reached agreement to develop a collaborative partnership."This occurred only two years after the establishment of the diplomatic relations between Germany and China,despite the shadow of the Cold War."Building up a partnership between Germany and 相似文献
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TANG Kun 《中国科学院院刊(英文版)》2014,(2):161-165
<正>The scientifi c goals of the Partner Group are to utilize large scale genomic polymorphism data to make fi ne inferences about human demographic history and various forms of natural selection in the human genome;and to understand the genetic basis and evolutionary mechanisms underlying the common variations in human facial morphology,both within and between populations. 相似文献