复杂系统与复杂性科学Pub Date : 2019-03-01DOI: 10.1142/9789813239609_0001
G. Nicolis
{"title":"The many facets of complexity","authors":"G. Nicolis","doi":"10.1142/9789813239609_0001","DOIUrl":"https://doi.org/10.1142/9789813239609_0001","url":null,"abstract":"","PeriodicalId":38342,"journal":{"name":"复杂系统与复杂性科学","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87305046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
复杂系统与复杂性科学Pub Date : 2018-04-10DOI: 10.1142/9789813239609_0010
Alessandro Corbetta, F. Toschi
{"title":"Path-integral representation of diluted pedestrian dynamics","authors":"Alessandro Corbetta, F. Toschi","doi":"10.1142/9789813239609_0010","DOIUrl":"https://doi.org/10.1142/9789813239609_0010","url":null,"abstract":"We frame the issue of pedestrian dynamics modeling in terms of path-integrals, a formalism originally introduced in quantum mechanics to account for the behavior of quantum particles, later extended to quantum field theories and to statistical physics. Path-integration enables a trajectory-centric representation of the pedestrian motion, directly providing the probability of observing a given trajectory. This appears as the most natural language to describe the statistical properties of pedestrian dynamics in generic settings. In a given venue, individual trajectories can belong to many possible usage patterns and, within each of them, they can display wide variability. \u0000We provide first a primer on path-integration, and we introduce and discuss the path-integral functional probability measure for pedestrian dynamics in the diluted limit. As an illustrative example, we connect the path-integral description to a Langevin model that we developed previously for a particular crowd flow condition (the flow in a narrow corridor). Building on our previous real-life measurements, we provide a quantitatively correct path-integral representation for this condition. Finally, we show how the path-integral formalism can be used to evaluate the probability of rare-events (in the case of the corridor, U-turns).","PeriodicalId":38342,"journal":{"name":"复杂系统与复杂性科学","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86412014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
复杂系统与复杂性科学Pub Date : 2017-03-01DOI: 10.13306/J.1672-3813.2017.01.009
Guodong Wang, Chao Gao, Ye Yuan, Z. Zhang
{"title":"Network-based analysis for discovering semantic redundancy","authors":"Guodong Wang, Chao Gao, Ye Yuan, Z. Zhang","doi":"10.13306/J.1672-3813.2017.01.009","DOIUrl":"https://doi.org/10.13306/J.1672-3813.2017.01.009","url":null,"abstract":"","PeriodicalId":38342,"journal":{"name":"复杂系统与复杂性科学","volume":"14 1","pages":"58-65"},"PeriodicalIF":0.0,"publicationDate":"2017-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41400706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
复杂系统与复杂性科学Pub Date : 2016-05-24DOI: 10.1142/9789813239609_0011
H. Qian
{"title":"Chemical reaction kinetic perspective with mesoscopic nonequilibrium thermodynamics","authors":"H. Qian","doi":"10.1142/9789813239609_0011","DOIUrl":"https://doi.org/10.1142/9789813239609_0011","url":null,"abstract":"We distinguish a mechanical representation of the world in terms of point masses with positions and momenta and the chemical representation of the world in terms of populations of different individuals, each with intrinsic stochasticity, but population wise with statistical rate laws in their syntheses, degradations, spatial diffusion, individual state transitions, and interactions. Such a formal kinetic system in a small volume $V$, like a single cell, can be rigorously treated in terms of a Markov process describing its nonlinear kinetics as well as nonequilibrium thermodynamics at a mesoscopic scale. We introduce notions such as open, driven chemical systems, entropy production, free energy dissipation, etc. Then in the macroscopic limit, we illustrate how two new \"laws\", in terms of a generalized free energy of the mesoscopic stochastic dynamics, emerge. Detailed balance and complex balance are two special classes of \"simple\" nonlinear kinetics. Phase transition is intrinsically related to multi-stability and saddle-node bifurcation phenomenon, in the limits of time $trightarrowinfty$ and system's size $Vrightarrowinfty$. Using this approach, we re-articulate the notion of inanimate equilibrium branch of a system and nonequilibrium state of a living matter, as originally proposed by Nicolis and Prigogine, and seek a logic consistency between this viewpoint and that of P. W. Anderson and J. J. Hopfield's in which macroscopic law emerges through symmetry breaking.","PeriodicalId":38342,"journal":{"name":"复杂系统与复杂性科学","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2016-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74873876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
复杂系统与复杂性科学Pub Date : 2014-01-01DOI: 10.13306/J.1672-3813.2014.01.004
Qiang Liu, Jin-Qing Fang, Geng Zhao, Yong Li
{"title":"Advances in Halo-Chaos Synchronization Control and Some Encryption Methods","authors":"Qiang Liu, Jin-Qing Fang, Geng Zhao, Yong Li","doi":"10.13306/J.1672-3813.2014.01.004","DOIUrl":"https://doi.org/10.13306/J.1672-3813.2014.01.004","url":null,"abstract":"The halo-chaos beam transport network with small world(WS)and scale-free(BA) characteristics was constructed.Several synchronization control methods to realize the synchronization control of halo-chaos and three kinds of circuit schemes for secure communication were proposed and simulation tests were done.Based on the research of chaos complexity,we explore a new method of chaotic algorithm,and successfully develope a data cryptograph prototype,which was applied to telephone communication networks with computer on line experimentally.We also proposed a chaotic encryption system based on combination of chaotic encryption algorithm with traditional algorithm,achieved the hardware developed by FPGA Technology,and realized file encryption and decryption communication experiment on the internet.In the research on information hiding technique,the encryption information is hided in JPEG format images,and the hiding effect is good by testing and engineering application.","PeriodicalId":38342,"journal":{"name":"复杂系统与复杂性科学","volume":"11 1","pages":"23-40"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66260030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
复杂系统与复杂性科学Pub Date : 2010-05-15DOI: 10.7498/aps.59.3070
Zhong Min, Tang Guo-ning
{"title":"Suppressing spiral waves and spatiotemporal chaos in cardiac tissue by using calcium channel agonist","authors":"Zhong Min, Tang Guo-ning","doi":"10.7498/aps.59.3070","DOIUrl":"https://doi.org/10.7498/aps.59.3070","url":null,"abstract":"Suppression of spiral waves and spatiotemporal chaos in cardiac tissue has been considered based on the LuoRudy 91 model. To suppress spiral waves and spatiotemporal chaos, the control strategy which employs calcium channel agonist to enhance the maximum conductivity of the slow inward calcium current is proposed. The numerical results show that the method can effectively suppress the spiral wave and spatiotemporal chaos in cardiac tissue even if the distribution of the time-dependent potassium current is non-uniform. The control mechanism has been analyzed.","PeriodicalId":38342,"journal":{"name":"复杂系统与复杂性科学","volume":"59 1","pages":"3070-3076"},"PeriodicalIF":0.0,"publicationDate":"2010-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71343522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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