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Numerical Computation of SEIR Model for the Zika Virus Spreading
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作者 Suthep Suantai Zulqurnain Sabir +1 位作者 Muhammad Asif Zahoor Raja Watcharaporn Cholamjiak 《Computers, Materials & Continua》 SCIE EI 2023年第4期2155-2170,共16页
The purpose of this study is to present the numerical performancesand interpretations of the SEIR nonlinear system based on the Zika virusspreading by using the stochastic neural networks based intelligent computingso... The purpose of this study is to present the numerical performancesand interpretations of the SEIR nonlinear system based on the Zika virusspreading by using the stochastic neural networks based intelligent computingsolver. The epidemic form of the nonlinear system represents the four dynamicsof the patients, susceptible patients S(y), exposed patients hospitalized inhospital E(y), infected patients I(y), and recovered patients R(y), i.e., SEIRmodel. The computing numerical outcomes and performances of the systemare examined by using the artificial neural networks (ANNs) and the scaledconjugate gradient (SCG) for the training of the networks, i.e., ANNs-SCG.The correctness of the ANNs-SCG scheme is observed by comparing theproposed and reference solutions for three cases of the SEIR model to solvethe nonlinear system based on the Zika virus spreading dynamics throughthe knacks of ANNs-SCG procedure based on exhaustive experimentations.The outcomes of the ANNs-SCG algorithm are found consistently in goodagreement with standard numerical solutions with negligible errors. Moreover,the procedure’s constancy, dependability, and exactness are perceived by usingthe values of state transitions, error histogram measures, correlation, andregression analysis. 展开更多
关键词 SEIR nonlinear system Zika virus artificial neural networks scaled conjugate gradient statistical measures
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Sense Estimation and Instrumental Evaluation of Fabric-Evoked Prickle 被引量:1
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作者 敖利民 郁崇文 《Journal of Donghua University(English Edition)》 EI CAS 2004年第3期82-87,共6页
In this paper, the mechanism of fabric-evoked prickle is discussed, which indicates that the mechanical stimuli aroused by the fiber ends on the fabric surface to the skin-sensory receptors are responsible for prickle... In this paper, the mechanism of fabric-evoked prickle is discussed, which indicates that the mechanical stimuli aroused by the fiber ends on the fabric surface to the skin-sensory receptors are responsible for prickle. The factors influencing the intensity of prickle are specialized and anatomized. Several means of sense estimate, including the corresponding statistical measures, are described. A few groping objective methods of evaluating prickle are analyzed, including the testing principles, the advantages and the disadvantages. At last, a new concept is proposed on the objective evaluation of prickle. 展开更多
关键词 MECHANISM the influencing factors statistical measures subjective evaluation objective evaluation
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The chaotification of discrete Hopfield neural networks via impulsive control 被引量:2
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作者 刘娜 关治洪 《Chinese Physics Letters》 SCIE CAS CSCD 2009年第7期55-57,共3页
The chaotification of discrete Hopfield neural networks is studied with impulsive control techniques. No matter whether the original systems are stable or not, chaotilication theorems for discrete Hopfield neural netw... The chaotification of discrete Hopfield neural networks is studied with impulsive control techniques. No matter whether the original systems are stable or not, chaotilication theorems for discrete Hopfield neural networks are derived, respectively. Finally, the effectiveness of the theoretical results is illustrated by some numerical examples. 展开更多
关键词 Instrumentation and measurement Statistical physics and nonlinear systems
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Complexity analyses of multi-wing chaotic systems 被引量:1
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作者 贺少波 孙克辉 朱从旭 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第5期220-225,共6页
The complexities of multi-wing chaotic systems based on the modified Chen system and a multi-segment quadratic function are investigated by employing the statistical complexity measure (SCM) and the spectral entropy... The complexities of multi-wing chaotic systems based on the modified Chen system and a multi-segment quadratic function are investigated by employing the statistical complexity measure (SCM) and the spectral entropy (SE) algorithm. How to choose the parameters of the SCM and SE algorithms is discussed. The results show that the complexity of the multi-wing chaotic system does not increase as the number of wings increases, and it is consistent with the results of the Grassberger-Procaccia (GP) algorithm and the largest Lyapunov exponent (LLE) of the multi-wing chaotic system. 展开更多
关键词 COMPLEXITY multi-wing chaotic system statistical complexity measure (SCM) spectral entropy(SE)
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Information Feedback Strategies in a Signal Controlled Network with Overlapped Routes 被引量:2
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作者 田丽君 黄海军 刘天亮 《Chinese Physics Letters》 SCIE CAS CSCD 2009年第7期388-391,共4页
We investigate the effects of four different information feedback strategies on the dynamics of traffic, travelers' route choice and the resultant system performance in a signal controlled network with overlapped rou... We investigate the effects of four different information feedback strategies on the dynamics of traffic, travelers' route choice and the resultant system performance in a signal controlled network with overlapped routes. Simulation results given by the cellular automaton model show that the system purpose-based mean velocity feedback strategy and the congestion coefficient feedback strategy have more advantages in improving network utilization efficiency and reducing travelers' travel times. The travel time feedback strategy and the individual purposed-based mean velocity feedback strategy behave slightly better to ensure user equity. 展开更多
关键词 Instrumentation and measurement Environmental and Earth science Statistical physics and nonlinear systems
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A New Approach to Probability Assessment 被引量:1
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作者 Warren Richard Hughes 《Chinese Business Review》 2022年第1期16-18,共3页
Using spreadsheets and ranges for pairwise judgments,candidate probability distributions are generated for the decision-maker to consider.This replaces event-by-event determination of probabilities.Basic statistics of... Using spreadsheets and ranges for pairwise judgments,candidate probability distributions are generated for the decision-maker to consider.This replaces event-by-event determination of probabilities.Basic statistics of the distributions are then used to determine a final distribution for decision purposes as in buy,sell,or hold. 展开更多
关键词 probability assessment pairwise judgments spreadsheet analysis statistical measures
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FRACTAL PROPERTIES OF STATISTICALLY SELF-SIMILAR SETS
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作者 余旌胡 范文涛 《Acta Mathematica Scientia》 SCIE CSCD 2000年第2期256-260,共5页
In this paper, authors compute the Packing dimension of statistically selfsimilar sets and obtaine the dimension and dimension distribution of statistically self-similar measure.
关键词 statistically self-similar set statistically self-similar measure dimension distribution contractive map
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Chaos Control and Synchronization of Cellular Neural Network with Delays Based on OPNCL Control
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作者 唐谦 王兴元 《Chinese Physics Letters》 SCIE CAS CSCD 2010年第3期72-75,共4页
The problem of chaos control and complete synchronization of cellular neural network with delays is studied. Based on the open plus nonlinear closed loop (OPNCL) method, the control scheme and synchronization scheme... The problem of chaos control and complete synchronization of cellular neural network with delays is studied. Based on the open plus nonlinear closed loop (OPNCL) method, the control scheme and synchronization scheme are designed. Both the schemes can achieve the chaos control and complete synchronization of chaotic neural network respectively, and their validity is further verified by numerical simulation experiments. 展开更多
关键词 Instrumentation and measurement Statistical physics and nonlinear systems
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Measure theory of statistical convergence 被引量:27
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作者 CHENG LiXin LIN GuoChen +1 位作者 LAN YongYi LIU Hui 《Science China Mathematics》 SCIE 2008年第12期2285-2303,共19页
The question of establishing measure theory for statistical convergence has been moving closer to center stage, since a kind of reasonable theory is not only fundamental for unifying various kinds of statistical conve... The question of establishing measure theory for statistical convergence has been moving closer to center stage, since a kind of reasonable theory is not only fundamental for unifying various kinds of statistical convergence, but also a bridge linking the studies of statistical convergence across measure theory, integration theory, probability and statistics. For this reason, this paper, in terms of subdifferential, first shows a representation theorem for all finitely additive probability measures defined on the σ-algebra of all subsets of N, and proves that every such measure can be uniquely decomposed into a convex combination of a countably additive probability measure and a statistical measure (i.e. a finitely additive probability measure μ with μ(k) = 0 for all singletons {k}). This paper also shows that classical statistical measures have many nice properties, such as: The set of all such measures endowed with the topology of point-wise convergence on forms a compact convex Hausdorff space; every classical statistical measure is of continuity type (hence, atomless), and every specific class of statistical measures fits a complementation minimax rule for every subset in N. Finally, this paper shows that every kind of statistical convergence can be unified in convergence of statistical measures. 展开更多
关键词 statistical convergence statistical measure SUBDIFFERENTIAL Banach space 60B05 46G99 40A99
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Measurement of Joint Roughness Coefficient by Using Profilograph and Roughness Ruler 被引量:19
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作者 杜时贵 胡云进 胡晓飞 《Journal of Earth Science》 SCIE CAS CSCD 2009年第5期890-896,共7页
Joint roughness coefficient(JRC) is the key parameter for the empirical estimation of joint shear strength by using the JRC-JCS(joint wall compressive strength) model.Because JRC has such characteristics as nonuni... Joint roughness coefficient(JRC) is the key parameter for the empirical estimation of joint shear strength by using the JRC-JCS(joint wall compressive strength) model.Because JRC has such characteristics as nonuniformity,anisotropy,and unhomogeneity,directional statistical measurement of JRC is the precondition for ensuring the reliability of the empirical estimation method.However,the directional statistical measurement of JRC is time-consuming.In order to present an ideal measurement method of JRC,new profilographs and roughness rulers were developed according to the properties of rock joint undulating shape based on the review of measurement methods of JRC.Operation methods of the profilographs and roughness rulers were also introduced.A case study shows that the instruments and operation methods produce an effective means for the statistical measurement of JRC. 展开更多
关键词 joint roughness coefficient profilograph roughness ruler empirical estimation direc-tional statistical measurement.
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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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Statistical Convergence and Measure Convergence Generated by a Single Statistical Measure 被引量:1
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作者 Li Xin CHENG Li Hua LIN Xian Geng ZHOU 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2016年第6期668-682,共15页
The purpose of this paper is to discuss those kinds of statistical convergence, in terms of F , or ideal Z-convergence, which are equivalent to measure convergence defined by a single statistical measure. We prove a n... The purpose of this paper is to discuss those kinds of statistical convergence, in terms of F , or ideal Z-convergence, which are equivalent to measure convergence defined by a single statistical measure. We prove a number of characterizations of a single statistical measure μ-convergence by using properties of its corresponding quotient Banach space l∞/l∞ (Iμ). We also show that the usual sequential convergence is not equivalent to a single measure convergence. 展开更多
关键词 Statistical measure ULTRAFILTER extreme points statistical convergence
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A cumulative standard deviation sum based method for high resistance fault identification and classification in power transmission lines 被引量:2
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作者 Mohammed HHMusa Zhengyou He +1 位作者 Ling Fu Yujia Deng 《Protection and Control of Modern Power Systems》 2018年第1期300-311,共12页
High resistance fault poses an enormous challenge to the existing algorithms of fault detection and fault classification.In this paper,the standard deviation and accumulation method are employed to perform the fault d... High resistance fault poses an enormous challenge to the existing algorithms of fault detection and fault classification.In this paper,the standard deviation and accumulation method are employed to perform the fault detection and classification.It is primarily built in two stages.Firstly,the standard deviations for the measured current’s signals of the local and remote terminals is computed to extract the fault feature.Secondly,the cumulative approach is used to enlarge the fault feature to perform the high resistance fault.The proposed scheme is known as Standard Deviation Index(SDI),and it is obtained for the three phases and zero sequence.The proposed algorithm has been tested through different fault circumstances such as multiple faults locations,fault resistances,and fault inception time.Moreover,far-end faults with high-resistance,faults happened nearby the terminal,faults considering variable loading angle,sudden load change,different sampling frequency,bad signaling and a fault occurred in the presence of series compensation are also discussed.The results show that the proposed scheme performed remarkably well regarding the fault with resistance up to 1.5kΩand can be detected within a millisecond after the fault inception.Additionally,the computational simplicity that characterizes the processes makes it more efficient and suitable for domain applications. 展开更多
关键词 Power transmission line Statistic measures High resistance fault Cumulative sum
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A Survey of Repetitive Control for Nonlinear Systems 被引量:1
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作者 Quan Quan Kai-Yuan Cai 《Science Foundation in China》 CAS 2010年第2期45-53,共9页
In aerospace engineering and industry, control tasks are often of a periodic nature,while repetitive control is especially suitable for tracking and rejection of periodic exogenous signals.Because of limited research ... In aerospace engineering and industry, control tasks are often of a periodic nature,while repetitive control is especially suitable for tracking and rejection of periodic exogenous signals.Because of limited research effort on nonlinear systems, we give a survey of repetitive control for nonlinear systems in this paper.First,a brief introduction of repetitive control is presented.Then,after giving a brief overview of repetitive control for linear systems,this paper summarizes design methods and existing problems of repetitive control for nonlinear systems in detail.Lastly,relationships between repetitive control and other control schemes are analyzed to recognize repetitive control from different aspects more insightfully. 展开更多
关键词 Instrumentation and measurement Statistical physics and nonlinear systems
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Statistical Measure for Risk-seeking Stochastic Wind Power Offering Strategies in Electricity Markets
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作者 Dongliang Xiao Haoyong Chen +1 位作者 Chun Wei Xiaoqing Bai 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2022年第5期1437-1442,共6页
This study proposes a statistical measure and a stochastic optimization model for generating risk-seeking wind power offering strategies in electricity markets. Inspired by the value at risk(VaR) to quantify risks in ... This study proposes a statistical measure and a stochastic optimization model for generating risk-seeking wind power offering strategies in electricity markets. Inspired by the value at risk(VaR) to quantify risks in the worst-case scenarios of a profit distribution, a statistical measure is proposed to quantify potential high profits in the best-case scenarios of a profit distribution,which is referred to as value at best(VaB)in the best-case scenarios. Then, a stochastic optimization model based on VaB is developed for a risk-seeking wind power producer, which is formulated as a mixed-integer linear programming problem. By adjusting the parameters in the proposed model, the wind power producer can flexibly manage the potential high profits in the best-case scenarios from the probabilistic perspective. Finally, the proposed statistical measure and riskseeking stochastic optimization model are verified through case studies. 展开更多
关键词 Electricity market risk-seeking statistical measure stochastic optimization wind power
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A novel multiple-outlier-robust Kalman filter
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作者 Yulong HUANG Mingming BAI Yonggang ZHANG 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2022年第3期422-437,共16页
This paper presents a novel multiple-outlier-robust Kalman filter(MORKF)for linear stochastic discretetime systems.A new multiple statistical similarity measure is first proposed to evaluate the similarity between two... This paper presents a novel multiple-outlier-robust Kalman filter(MORKF)for linear stochastic discretetime systems.A new multiple statistical similarity measure is first proposed to evaluate the similarity between two random vectors from dimension to dimension.Then,the proposed MORKF is derived via maximizing a multiple statistical similarity measure based cost function.The MORKF guarantees the convergence of iterations in mild conditions,and the boundedness of the approximation errors is analyzed theoretically.The selection strategy for the similarity function and comparisons with existing robust methods are presented.Simulation results show the advantages of the proposed filter. 展开更多
关键词 Kalman filtering Multiple statistical similarity measure Multiple outliers Fixed-point iteration State estimate
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