本文關(guān)鍵詞： 復(fù)雜網(wǎng)絡(luò) 信息傳播 疾病傳播　出處：《廣西師范大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：目前人們對信息傳播的研究往往采用源于疾病傳播的SIR模型、SIS模型或基于這些模型的變體,但是信息傳播與疾病傳播之間存在本質(zhì)的區(qū)別:在信息傳播中人的主觀能動性起重要作用,且信息具有及時(shí)性、可靠性,除了傳統(tǒng)的面對面交流外,主要通過在線鏈接傳播;而在疾病傳播中人們則完全是被動的,且病毒可以長時(shí)間保持活性,其傳播方式通常需要身體接觸或空氣傳播。我們的工作就是圍繞信息傳播和疾病傳播展開。具體內(nèi)容如下:(1)探究群落網(wǎng)絡(luò)中的各群落連邊密度及規(guī)模對群落網(wǎng)絡(luò)中傳播影響。結(jié)果表明在四個(gè)群落構(gòu)成的群落網(wǎng)絡(luò)中,當(dāng)各群落網(wǎng)絡(luò)規(guī)模一樣并且傳播源所在群落平均度一定而增大其它群落平均度時(shí),各群落以及網(wǎng)絡(luò)整體的傳播規(guī)模都會增大;當(dāng)各群落網(wǎng)絡(luò)規(guī)模一樣但平均度都互不相同時(shí),隨著選擇的傳播源所在群落的平均度越大,各群落以及網(wǎng)絡(luò)整體傳播規(guī)模增大;當(dāng)各群落平均度一樣但群落規(guī)模都不同時(shí),隨著選擇的傳播源所在群落的規(guī)模越大,網(wǎng)絡(luò)整體傳播規(guī)模增大,但傳播源所在群落的傳播規(guī)模會減小;在雙群落網(wǎng)絡(luò)中單次傳播情況下,網(wǎng)絡(luò)整體傳播規(guī)模會出現(xiàn)單峰,雙峰,三峰等不同的情況。(2)自2015年以來,“重要的事情說三遍”成為最熱門的網(wǎng)絡(luò)流行用語之一,我們研究的問題就是同樣的一條信息重復(fù)三次對其傳播的影響。結(jié)果表明信息重復(fù)傳播三次確實(shí)能增大傳播規(guī)模;考慮到人們對信息會遺忘的特點(diǎn)我們引入時(shí)間衰減強(qiáng)度參數(shù),隨著時(shí)間推移,相信信息概率會降低,這導(dǎo)致隨著時(shí)間衰減強(qiáng)度的增大,信息傳播規(guī)模會降低,并且我們發(fā)現(xiàn)當(dāng)社會加強(qiáng)作用大的時(shí)候規(guī)則網(wǎng)絡(luò)的傳播規(guī)模下降更多,社會加強(qiáng)作用較小時(shí)隨機(jī)網(wǎng)絡(luò)的傳播規(guī)模下降得更多;我們還考慮了信息發(fā)出的間隔時(shí)間長度對信息傳播的影響,發(fā)現(xiàn)社會加強(qiáng)作用大的時(shí)候發(fā)出信息間隔時(shí)間加長對規(guī)則網(wǎng)絡(luò)影響不大但對隨機(jī)網(wǎng)絡(luò)有一定的影響,當(dāng)社會加強(qiáng)作用小的時(shí)候間隔時(shí)間加長會導(dǎo)致傳播規(guī)模下降。(3)考察群落網(wǎng)絡(luò)中集中與分散選取多傳播源對信息傳播的影響,鑒于前人的研究得出的結(jié)論選取多個(gè)傳播源能增大信息傳播規(guī)模,我們研究的是探究多個(gè)傳播源選取方式不同對信息傳播影響,我們發(fā)現(xiàn)無論是在隨機(jī)網(wǎng)絡(luò)還是規(guī)則網(wǎng)絡(luò)中,分散選取傳播源方式都比集中選取傳播源方式的傳播規(guī)模要大得多。
[Abstract]:At present, people often use SIR models derived from disease transmission, or variants based on these models, in the study of information transmission. But there is an essential difference between information transmission and disease transmission: the subjective initiative plays an important role in information communication, and the information is timely and reliable. In addition to traditional face-to-face communication, it is mainly transmitted through online links; And people are completely passive in disease transmission, and the virus stays alive for a long time. It usually involves physical contact or airborne transmission. Our job is to focus on information and disease transmission. The results show that in a network of four communities, When the network size of each community is the same and the average degree of the community where the transmission source is constant, the propagation scale of each community and the whole network will increase when the average degree of the community is constant, and when the network size of each community is the same but the average degree is different, The larger the average degree of the selected community, the larger the community and the network as a whole; when the average degree of each community is the same but the community size is different, the larger the community size is, the larger the community size is. The whole transmission scale of the network increases, but the propagation scale of the community where the source is located will decrease; in the case of a single transmission in the dual community network, the overall transmission scale of the network will appear single peak and double peak. Since 2015, "say important things three times" has become one of the most popular online phrases. The problem we are studying is the effect of the same information repetition three times on its propagation. The results show that the information repetition three times can really increase the propagation scale; considering the characteristic that people forget about information, we introduce the time attenuation intensity parameter. Over time, it is believed that the probability of information will decrease, which leads to a decrease in the scale of information dissemination as the intensity of attenuation increases over time, and we find that the scale of regular networks decreases even more when society becomes more powerful. We also consider the effect of the interval between messages on the spread of information. It is found that the extended interval between messages has little effect on the regular network but has a certain effect on the random network when the social strengthening effect is great. When the social strengthening effect is small, the longer the interval will lead to the decrease of the spread scale. (3) to investigate the influence of the concentration and dispersion of multiple sources of communication in the community network on the information dissemination. In view of the conclusion of previous studies that selecting multiple sources of communication can increase the scale of information dissemination, we study the influence of different ways of selecting multiple sources of communication on information dissemination. We find that whether in random or regular networks, The spread scale of decentralized selection of source is much larger than that of centralized selection of source.
【學(xué)位授予單位】：廣西師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O157.5

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本文編號：1504160