Principles of Information Science Chapter g Information Organization System Optimization Theory
Principles of Information Science Chapter 9 Information Organization -- System Optimization Theory
81.1 System Fundamentals Definitions System: Definitions System -integrity of elements that form a certain structure internally and perform certain functions externally von bertalanffy:"System --set of interrelated elements" ●●● ●●● ●●●●
§1.1 System Fundamentals - Definitions System: Definitions System – integrity of elements that form a certain structure internally and perform certain functions externally. L. von Bertalanffy: “System -- set of interrelated elements
81.2 System Fundamentals Features Basic features of systems include: (1) Integrity as an entirety (2) Interrelated among elements 3)Multilevel (4 ) Relativity (5)Goal-Keeping (6)Dynamic
Basic Features of Systems include: (1) Integrity as an entirety; (2) Interrelated among elements; (3) Multilevel (4) Relativity (5) Goal-Keeping (6) Dynamic §1.2 System Fundamentals - Features
81.3 Organization Information Information and Stochastic System's Organism A stochastic system S=((S1, pi),. ,( Sn, p),.. (SN, PN) Uncertainty: H(S)=-2 pn log p. 0=[H(S)lmsH(S)≤[H(S)】mx=H=logN Organization: a Ho-HS)=R
§1.3 Organization & Information Information and Stochastic System’s Organism A stochastic system S = {(s1, p1), …, (sn, pn), …, (sN, pN)} Uncertainty: H(S) = - pn log pn n 0 = [H(S)]min H(S) [H(S)]max = H0 = logN Organization: = H0 – H(S) H0 = R
§14 Self-Organizing& Information Conditions Required for Self-Organizing A system, S, under environment, E, is self-organizable iff H(S)>H(E)≥00r>0 dt The latter means H(S)dHo, Ho dH(S), and this leads to dt dt D)IfNis given, d Ho/dt=0, then it must have dH(S<0% dt 2)If H(S)=Const and n is variable, then it must have dh >0
§1.4 Self-Organizing & Information Conditions Required for Self-Organizing A system, S, under environment, E, is self-organizable iff H(S) > H(E) 0 or dR dt > 0, The latter means H(S) dH0 dt > H0 dH(S) dt , and this leads to 1) If N is given, dH0/dt = 0, then it must have dH(S) dt < 0; 2) If H(S) = Const and N is variable, then it must have dH0 dt > 0