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Fractals Generated by Statistical Contraction Operators
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作者 Hu Di\|he School of Mathematics and Statistics, Wuhan University, Wuhan 430072, Hubei, China 《Wuhan University Journal of Natural Sciences》 CAS 2002年第3期274-280,共7页
In the theory of random fractal, there are two important classes of random sets, one is the class of fractals generated by the paths of stochastic processes and another one is the class of factals generated by statist... In the theory of random fractal, there are two important classes of random sets, one is the class of fractals generated by the paths of stochastic processes and another one is the class of factals generated by statistical contraction operators. Now we will introduce some things about the probability basis and fractal properties of fractals in the last class. The probability basis contains (1) the convergence and measurability of a random recursive setK(ω) as a random element, (2) martingals property. The fractal properties include (3) the character of various similarity, (4) the separability property, (5) the support and zero-one law of distributionP k =P·K ?1, (6) the Hausdorff dimension and Hausdorff exact measure function. 展开更多
关键词 statistical contraction operator FRACTAL statistically self-similar set a. s. self-similar set
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Dissipative Properties of ω-Order Preserving Partial Contraction Mapping in Semigroup of Linear Operator
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作者 Akinola Yussuff Akinyele Kamilu Rauf +1 位作者 Aasa Moses Adebowale Omosowon Jude Babatunde 《Advances in Pure Mathematics》 2019年第6期544-550,共7页
This paper consists of dissipative properties and results of dissipation on infinitesimal generator of a C0-semigroup of ω-order preserving partial contraction mapping (ω-OCPn) in semigroup of linear operator. The p... This paper consists of dissipative properties and results of dissipation on infinitesimal generator of a C0-semigroup of ω-order preserving partial contraction mapping (ω-OCPn) in semigroup of linear operator. The purpose of this paper is to establish some dissipative properties on ω-OCPn which have been obtained in the various theorems (research results) and were proved. 展开更多
关键词 SEMIGROUP Linear operator DISSIPATIVE operator contraction Mapping and RESOLVENT
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Approximative Method of Fixed Point for Φ-Pseudocontractive Operator and an Application to Equation with Accretive Operator
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作者 Yixin Wen Aifang Feng Yuguang Xu 《Journal of Applied Mathematics and Physics》 2014年第1期21-25,共5页
In this paper, Φ-pseudo-contractive operators and Φ-accretive operators, more general than the strongly pseudo-contractive operators and strongly accretive operators, are introduced. By setting up a new inequality, ... In this paper, Φ-pseudo-contractive operators and Φ-accretive operators, more general than the strongly pseudo-contractive operators and strongly accretive operators, are introduced. By setting up a new inequality, authors proved that if ?is a uniformly continuous Φ-pseudo-contractive operator then T has unique fixed point q and the Mann iterative sequence with random errors approximates to q. As an application, the iterative solution of nonlinear equation with Φ-accretive operator is obtained. The results presented in this paper improve and generalize some corresponding results in recent literature. 展开更多
关键词 DUALITY Mapping Φ-Pseudo-contractive operator Φ-Accretive operator MANN ITERATIVE Sequence with Random Error Terms
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A Graphlike Manifold Whose Contraction is 被引量:1
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作者 刘晓真 《Chinese Quarterly Journal of Mathematics》 CSCD 2000年第3期76-77,共2页
For a graphlike manifold whose contraction is a generalized cuneate figure,we deribve a formula in this paper to compute the number of homeomorphism classes of it by using twist operations and the combinatorial theory.
关键词 contraction negative edges twist operation
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MEAN VALUE OF ANALYTIC OPERATOR FUNCTIONS
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作者 喻小培 蹇明 《Acta Mathematica Scientia》 SCIE CSCD 1995年第4期468-473,共6页
In this paper, it is proved that if A is a normal proper contraction on Hilbert space H and F(z) = U(z) + iV(z) is operator-valued analytic on the unit disc Delta and 0 < p < 1, then parallel to F(A)parallel to(... In this paper, it is proved that if A is a normal proper contraction on Hilbert space H and F(z) = U(z) + iV(z) is operator-valued analytic on the unit disc Delta and 0 < p < 1, then parallel to F(A)parallel to(p) less than or equal to parallel to F(0)parallel to(p) + C-p (1 - parallel to A parallel to)(-2) [GRAPHICS] 展开更多
关键词 Hilbert space operator operator-valued function proper contraction
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HARNACK'S INEQUALITIES FOR ANALYTIC OPERATOR FUNCTIONS
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作者 蹇明 杨长森 《Acta Mathematica Scientia》 SCIE CSCD 1997年第4期437-442,共6页
Some Harnack type inequalities for analytic operator functions have been obtained in this paper.
关键词 operator proper contraction Harnack's Inequality Schwarz's lemma
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CARATHEODORY INEQUALITY FOR ANALYTIC OPERATOR FUNCTION
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作者 Yang Changsenof Math., Henan Normal Univ., Xinxiang 453002. 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2001年第3期285-289,共5页
Suppose H is a complex Hilbert space, A H(Δ) denotes the set of all analytic operator functions on Δ, and the set N H(Δ)={f(z)|f(z) is an analytic operator function on the open uint disk Δ, f(z)f(w)=f(w)f(z),f... Suppose H is a complex Hilbert space, A H(Δ) denotes the set of all analytic operator functions on Δ, and the set N H(Δ)={f(z)|f(z) is an analytic operator function on the open uint disk Δ, f(z)f(w)=f(w)f(z),f *(z)f(z)=f(z)f *(z),z,w∈Δ}. The note proves that if f(z)∈N H(Δ),(or A H(Δ))‖f(z)‖≤1,z∈Δ then‖f′(T)‖≤(1-‖T‖ 2) -1 ‖I-f *(T)f(T)‖ 12 ‖I-f(T)f *(T)‖ 12 , where T∈L(H)(orT *T=TT *,respectively),‖T‖<1,Tf=fT. 展开更多
关键词 Analytic operator function proper contraction resolution of identity.
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Some Result of Stability and Spectra Properties on Semigroup of Linear Operator
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作者 Kamilu Rauf Akinola Yussuff Akinyele +2 位作者 Mfon Okon Etuk Rafiu Obashola Zubair Moses Adebowale Aasa 《Advances in Pure Mathematics》 2019年第1期43-51,共9页
This paper consists of some properties of a new subclass of semigroup of linear operator. The stability and spectra analysis of ω-order preserving partial contraction mapping (ω-OCPn) are obtained. The results show ... This paper consists of some properties of a new subclass of semigroup of linear operator. The stability and spectra analysis of ω-order preserving partial contraction mapping (ω-OCPn) are obtained. The results show that operators on the proposed ω-OCPn are densely defined and closed. Several existing results in the literature are contained in this work. 展开更多
关键词 contraction Mapping SEMIGROUP BANACH Space RESOLVENT and BOUNDED operator
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Case Study:Productive Performance and Prediction of Operating Income of Small-Scale Contract Farming of Swine in Lampang,Thailand
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作者 Suntorn Wittayakun Worawut Chainetr +3 位作者 Nirundorn Kongngoen Weera Innaree Piyamas Tancharoenrat Ir.Marjuki 《Journal of Agricultural Science and Technology(A)》 2019年第3期177-181,共5页
The objective of this study was to examine productive performance and predict factors affecting operating income of small-scale contract farming of swine(SCFS)in Lampang,Thailand.Ten SCFSs were selected by purposive s... The objective of this study was to examine productive performance and predict factors affecting operating income of small-scale contract farming of swine(SCFS)in Lampang,Thailand.Ten SCFSs were selected by purposive sampling as primary data sources for two consecutive fattening cycles during the year 2015-2017.Data indicated that the SCFS was feeder pig finishing system which herd size(HS)averaged 502 head/farm.The animals consumed approximate 1.59 kg of feed/head/d.The average daily gain(ADG)was 675.22 g/d and feed conversion ratio(FCR)was 2.42.The mean of fattening time(FT)averaged 158 d/cycle.The culling rate(CR)and mortality rate(MR)were 0.17%and 2.50%,respectively.The predicted operating income(POI)was estimated by multiple linear regressions.The equation was:POI=2,700.912+0.027HS–7.119CR–18.225MR+16.885ABW+806.466FI–4.142ADG–420.281FCR–9.719FT(ABW=average body weight;FI=feed intake)with r=0.899,r2=0.808,p-value=0.009.According to stepwise procedure,the potential equation was:POI=323.664FI–9.769MR–22.635 with r=0.837,r2=0.701,p-value=0.000.This predicted equation would benefit as a monitoring index for SCFS to manage their expected operating income and proper farm management to be further profitable and sustainable. 展开更多
关键词 contract FARMING SWINE operating INCOME
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DIFFERENTIAL INEQUALITIES OF OPERATOR-VALUED ANALYTIC FUNCTIONS
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作者 蹇明 《Acta Mathematica Scientia》 SCIE CSCD 2001年第2期166-170,共5页
Some differential inequalities and integral inequalities for operator-valued an- alytic functions are investigated.
关键词 Proper contraction operator-valued analytic function differential inequality integral inequality
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Operator Equation and Application of Variation Iterative Method
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作者 Ning Chen Jiqian Chen 《Applied Mathematics》 2012年第8期857-863,共7页
In this paper, we study some semi-closed 1-set-contractive operators A and investigate the boundary conditions under which the topological degrees of 1-set contractive fields, deg (I-A, Ω, p) are equal to 1. Correspo... In this paper, we study some semi-closed 1-set-contractive operators A and investigate the boundary conditions under which the topological degrees of 1-set contractive fields, deg (I-A, Ω, p) are equal to 1. Correspondingly, we can obtain some new fixed point theorems for 1-set-contractive operators which extend and improve many famous theorems such as the Leray-Schauder theorem, and operator equation, etc. Lemma 2.1 generalizes the famous theorem. The calculation of topological degrees and index are important things, which combine the existence of solution of for integration and differential equation and or approximation by iteration technique. So, we apply the effective modification of He’s variation iteration method to solve some nonlinear and linear equations are proceed to examine some a class of integral-differential equations, to illustrate the effectiveness and convenience of this method. 展开更多
关键词 Topology DEGREES and Index 1-Set-contract operators Modified VARIATION ITERATION Method Integral-Differential Equation
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Region Analysis Approach for Constructing Solutions of Nonlinear Operator Equations(Dedicated to Professor You Zhaoyong for his 60th brithday)
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作者 M.A.Wolfe 《工程数学学报》 CSCD 1991年第2期31-45,共15页
Based on a variety of geometric observations for location of solutions, a general and unified region analysis framework for developing constructive solvability of nonlinear operator equations are proposed. Within this... Based on a variety of geometric observations for location of solutions, a general and unified region analysis framework for developing constructive solvability of nonlinear operator equations are proposed. Within this framework, the methods including interval, ball and ellipsoid methods can be studied in a unified way. The ball algorithm, as a typical example, is in particular analysed. 展开更多
关键词 Geometric ESTIMATOR ball ALGORITHM REGION contraction ALGORITHM computable test for existence of solution special types of nonlinear operators
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ORDERING CONTRACTION MAPPING PRINCIPLE AND APPLICATIONS
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作者 李福义 张庆政 《Acta Mathematica Scientia》 SCIE CSCD 1998年第4期457-460,共4页
This paper establishes an ordering contraction mapping principle for increasing mapping in partial ordering metric spaces, and applies it to prove the existence and uniqueness of fixed point for some nonlinear operato... This paper establishes an ordering contraction mapping principle for increasing mapping in partial ordering metric spaces, and applies it to prove the existence and uniqueness of fixed point for some nonlinear operators controlled by a linear operator and phi-concave operator in a partial ordering Banach space. Therefore, this two results are unified. 展开更多
关键词 partial ordering metric spaces ordering contraction mapping principle rho-concave operator
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I.I.D.STATISTICAL CONTRACTION OPERATORS AND STATISTICALLY SELF-SIMILAR SETS 被引量:2
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作者 HU DIHECollege of Mathematics and statistics, Wuhan University, Wuhan 430072, China. E-mail: dhhu@whu.edu.cn. 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2002年第4期461-468,共8页
I.i.d. random sequence is the simplest but very basic one in stochastic processes, and statistically self-similar set is the simplest but very basic one in random recursive sets in the theory of random fractal. Is the... I.i.d. random sequence is the simplest but very basic one in stochastic processes, and statistically self-similar set is the simplest but very basic one in random recursive sets in the theory of random fractal. Is there any relation between i.i.d. random sequence and statistically self-similar set? This paper gives a basic theorem which tells us that the random recursive set generated by a collection of i.i.d. statistical contraction operators is always a statistically self-similar set. 展开更多
关键词 Hausdorff metric Statistical contraction operator Statistically self-similar set Statistically self-similar measure
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Topological degree for 1-set-contractive fields in M-PN spaces and its applications 被引量:7
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作者 WU Zhao-qi ZHU Chuan-xi 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2010年第4期463-474,共12页
In this paper, we define the topological degree for 1-set-contractive fields in PN spaces. Based on this, we obtain some new fixed point theorems for 1-set-contractive operators. As an application, we study the existe... In this paper, we define the topological degree for 1-set-contractive fields in PN spaces. Based on this, we obtain some new fixed point theorems for 1-set-contractive operators. As an application, we study the existence of solutions for a kind of nonlinear Volterra integral equations in Z-M-PN space. 展开更多
关键词 PN-space 1-set-contractive operator topological degree fixed point theorem.
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On Hyperinvariant Subspaces of Contraction Operators on a Banach Space Whose Spectrum Contains the Unit Circle
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作者 Ming Xue LIU Department of Mathematics Guangdong Polytechnic Normal University Guangzhou 510665 P. R. China 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2008年第9期1471-1474,共4页
In this paper, we prove that every operator in a class of contraction operators on a Banach space whose spectrum contains the unit circle has a nontrivial hyperinvariant subspace.
关键词 Banach space contraction operator invariant subspace
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Viscosity Approximations by Generalized Contractions for Resolvents of Accretive Operators in Banach Spaces
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作者 Adrian PETRUSEL Jen-Chih YAO 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2009年第4期553-564,共12页
In this paper, we prove a strong convergence theorem for resolvents of accretive operators in a Banach space by the viscosity approximation method with a generalized contraction mapping. The proximal point algorithm i... In this paper, we prove a strong convergence theorem for resolvents of accretive operators in a Banach space by the viscosity approximation method with a generalized contraction mapping. The proximal point algorithm in a Banach space is also considered. The results extend some very recent theorems of W. Takahashi. 展开更多
关键词 viscosity approximation method accretive operator generalized contraction resolvent proximal point algorithm
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SOME FIXED POINT THEOREMS FOR SET-CONTRACTION OPERATORS
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作者 孙经先 《Chinese Science Bulletin》 SCIE EI 1986年第18期1225-1227,共3页
In this paper we study the computation of the topological degree and give some fixed point theorems for strict-set-contraction operators. These theorems extend and improve a series of results in [1], [2] and [4].
关键词 TOPOLOGICAL operatorS contraction STRICT GENERALIZATION 云一 君一 孙丽
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Barriers to the Adoption of BOT Contracts System for Infrastructural Development of Technical Universities in Ghana
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作者 Harold Adjarko Hiob Ayerakwah John Fynn 《Journal of Building Construction and Planning Research》 2018年第3期103-111,共9页
The study was conducted with the aim of exploring the barriers to the adoption of BOT contract systems for infrastructural development of technical universities in Ghana. In an empirical questionnaire survey with prof... The study was conducted with the aim of exploring the barriers to the adoption of BOT contract systems for infrastructural development of technical universities in Ghana. In an empirical questionnaire survey with professionals and experts in the construction and education sector, the respondents were invited to rate their perception on the barriers to the adoption of the BOT contracts systems. An interview session to satisfy ways of adopting the BOT contracts for infrastructural development in technical universities was conducted with selected professionals. The study revealed that the major barriers to the adoption of the BOT contract system are: delays in approval, corruption, reliability and credit worthiness of entities and expropriation. The study suggested that detailed policy or framework for implementing BOT contracts;proper planning by technical universities;and adequate protection for lenders is required for successful BOT implementation. Therefore there is a need to explore this concept, using adequate policy initiatives, proper measures and support from government to improve on the proper implementation of the BOT contracts in Technical Universities in Ghana. 展开更多
关键词 Ghana BUILD operate Transfer (BOT) contractS TECHNICAL UNIVERSITIES in Ghana
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RISK FRAMEWORK FOR ENERGY PERFORMANCE CONTRACTING BUILDING RETROFITS
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作者 George H.Berghorn M.G.Matt Syal 《Journal of Green Building》 2016年第2期93-115,共23页
Energy performance contracting(EPC)has emerged as a useful project financ-ing and delivery tool for building retrofits,particularly among building owner-ships which have experienced reduced funding for capital project... Energy performance contracting(EPC)has emerged as a useful project financ-ing and delivery tool for building retrofits,particularly among building owner-ships which have experienced reduced funding for capital projects.Through EPC,a contractor(called the EPC contractor or the energy service company)guaran-tees minimum energy savings performance and enables the building owner to finance the project using utility savings over the length of the project(which is typically 12-15 years,or longer).Despite its growing use,there is a dearth of lit-erature regarding a contractor’s risks related to the delivery and execution of EPC building retrofits.This is particularly important as the performance guarantee effec-tively transfers project performance risk from the owner to the EPC contractor.This research proposes a project factors-based risk framework for EPC building retrofits,initially developed through a comprehensive review of relevant literature and project documents and refined through the elicited expertise of 19 highly expe-rienced EPC contracting professionals.A Delphi technique-based expertise elici-tation strategy was used to confirm the findings of the a priori(literature-based)framework and provide additional analysis related to risk causes and control mea-sures as well as relative risk importance.This information was used to construct a refined risk framework which provides insight into the lengthy project performance period during the earliest phases of the project’s life cycle.This has the advantage of providing rapid screening of the project factors that can potentially lead to the greatest project performance risks. 展开更多
关键词 energy performance contracting(EPC) energy efficient building practices building retrofits project performance risks projected utility savings controlling operating costs
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