本文關(guān)鍵詞： 換熱網(wǎng)絡(luò) 復(fù)雜網(wǎng)絡(luò) 節(jié)點(diǎn)中心性 PageRank算法 旁路　出處：《青島科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著化工工藝過(guò)程的大型化和復(fù)雜化,其子系統(tǒng)換熱網(wǎng)絡(luò)也變得相對(duì)復(fù)雜,對(duì)其控制也更加困難,換熱網(wǎng)絡(luò)中換熱器的換熱效能發(fā)生改變,其干擾傳遞會(huì)導(dǎo)致與之相關(guān)聯(lián)的換熱器換熱效能改變,由于系統(tǒng)耦合嚴(yán)重,進(jìn)而影響到整個(gè)換熱網(wǎng)絡(luò)的操作性和穩(wěn)定性。為此,對(duì)換熱網(wǎng)絡(luò)中的換熱器節(jié)點(diǎn)進(jìn)行重要性研究,從而針對(duì)特定的換熱器進(jìn)行必要的監(jiān)測(cè)和設(shè)置旁路,具有重要意義。首先,在文獻(xiàn)綜述的基礎(chǔ)上,比較各個(gè)建模方法,選擇基于干擾傳遞構(gòu)建換熱網(wǎng)絡(luò)的復(fù)雜網(wǎng)絡(luò)模型,并對(duì)網(wǎng)絡(luò)的復(fù)雜性、小世界性和度分布特性等進(jìn)行描述和判斷。其次,為了全面綜合地評(píng)價(jià)該網(wǎng)絡(luò)模型,先從網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)出發(fā),不考慮網(wǎng)絡(luò)的方向性,定量計(jì)算網(wǎng)絡(luò)每個(gè)節(jié)點(diǎn)的點(diǎn)度中心性、中間中心性、接近中心性和特征向量中心性,由于各個(gè)指標(biāo)的側(cè)重點(diǎn)不同,提出了基于多屬性決策算法處理相關(guān)指標(biāo)的方法,得到基于拓?fù)浣Y(jié)構(gòu)的換熱網(wǎng)絡(luò)節(jié)點(diǎn)重要性評(píng)價(jià)數(shù)據(jù);在此基礎(chǔ)上,進(jìn)而考慮網(wǎng)絡(luò)的方向性,以PageRank算法對(duì)網(wǎng)絡(luò)的節(jié)點(diǎn)重要性進(jìn)行評(píng)價(jià),綜合兩種不同的算法結(jié)果得出最終結(jié)論。最后,以復(fù)雜網(wǎng)絡(luò)可控性研究理論為基礎(chǔ),分析網(wǎng)絡(luò)的鄰接矩陣,結(jié)合節(jié)點(diǎn)重要性排序和網(wǎng)絡(luò)嚴(yán)格可控的必要條件,確定一組網(wǎng)絡(luò)控制所需要的最優(yōu)驅(qū)動(dòng)節(jié)點(diǎn)組,將驅(qū)動(dòng)節(jié)點(diǎn)組所在的換熱器進(jìn)行旁路設(shè)計(jì)。通過(guò)案例分析,證明了本方法的有效性,該方法能夠有效地確定換熱網(wǎng)絡(luò)節(jié)點(diǎn)重要性,并為換熱網(wǎng)絡(luò)的旁路優(yōu)化設(shè)計(jì)提供理論支持。
[Abstract]:As the chemical process becomes larger and more complicated, the heat exchange network of its subsystems becomes more complex, and it is more difficult to control it. The heat transfer efficiency of the heat exchanger in the heat exchanger network is changed. Its interference transfer will result in the change of heat exchanger heat transfer efficiency associated with it. Because of the serious coupling of the system, the operation and stability of the whole heat exchanger network will be affected. Therefore, the importance of the heat exchanger node in the heat exchanger network is studied. It is of great significance to monitor and set up bypass channels for specific heat exchangers. Firstly, on the basis of literature review, various modeling methods are compared, and complex network models based on interference transfer are selected to construct heat exchanger networks. The complexity of the network, the characteristics of the small world and degree distribution are described and judged. Secondly, in order to evaluate the network model comprehensively and synthetically, the topological structure of the network is considered first, and the directionality of the network is not considered. Quantificationally calculate the vertex centrality, middle centrality, proximity centrality and eigenvector centrality of each node in the network. Because the emphasis of each index is different, a method based on multi-attribute decision making algorithm to deal with related indexes is proposed. The node importance evaluation data based on topology structure are obtained, and then, considering the directivity of the network, the importance of nodes is evaluated by PageRank algorithm. Finally, based on the theory of controllability of complex networks, the adjacency matrix of networks is analyzed, combined with the order of importance of nodes and the necessary conditions of strict controllability of networks. The optimal driving node group is determined for network control, and the heat exchanger in which the driving node group is located is designed by bypass. The effectiveness of this method is proved by case study, and the importance of heat transfer network node can be effectively determined by this method. It also provides theoretical support for bypass optimization design of heat transfer network.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ051.5

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