期刊文献+
共找到26篇文章
< 1 2 >
每页显示 20 50 100
Covid-19 Forecasting with Deep Learning-based Half-binomial Distribution Cat Swarm Optimization 被引量:1
1
作者 P.Renukadevi A.Rajiv Kannan 《Computer Systems Science & Engineering》 SCIE EI 2023年第1期629-645,共17页
About 170 nations have been affected by the COvid VIrus Disease-19(COVID-19)epidemic.On governing bodies across the globe,a lot of stress is created by COVID-19 as there is a continuous rise in patient count testing p... About 170 nations have been affected by the COvid VIrus Disease-19(COVID-19)epidemic.On governing bodies across the globe,a lot of stress is created by COVID-19 as there is a continuous rise in patient count testing positive,and they feel challenging to tackle this situation.Most researchers concentrate on COVID-19 data analysis using the machine learning paradigm in these situations.In the previous works,Long Short-Term Memory(LSTM)was used to predict future COVID-19 cases.According to LSTM network data,the outbreak is expected tofinish by June 2020.However,there is a chance of an over-fitting problem in LSTM and true positive;it may not produce the required results.The COVID-19 dataset has lower accuracy and a higher error rate in the existing system.The proposed method has been introduced to overcome the above-mentioned issues.For COVID-19 prediction,a Linear Decreasing Inertia Weight-based Cat Swarm Optimization with Half Binomial Distribution based Convolutional Neural Network(LDIWCSO-HBDCNN)approach is presented.In this suggested research study,the COVID-19 predicting dataset is employed as an input,and the min-max normalization approach is employed to normalize it.Optimum features are selected using Linear Decreasing Inertia Weight-based Cat Swarm Optimization(LDIWCSO)algorithm,enhancing the accuracy of classification.The Cat Swarm Optimization(CSO)algorithm’s convergence is enhanced using inertia weight in the LDIWCSO algorithm.It is used to select the essential features using the bestfitness function values.For a specified time across India,death and confirmed cases are predicted using the Half Binomial Distribution based Convolutional Neural Network(HBDCNN)technique based on selected features.As demonstrated by empirical observations,the proposed system produces significant performance in terms of f-measure,recall,precision,and accuracy. 展开更多
关键词 binomial distribution min-max normalization Cat Swarm Optimization(CSO) COVID-19 forecasting
下载PDF
Wigner Function of Density Operator for Negative Binomial Distribution 被引量:1
2
作者 XU Xing-Lei LI Hong-Qi 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第6期1453-1456,共4页
By using the technique of integration within an ordered product (IWOP) of operator we derive Wigner function of density operator for negative binomial distribution of radiation field in the mixed state case, then we... By using the technique of integration within an ordered product (IWOP) of operator we derive Wigner function of density operator for negative binomial distribution of radiation field in the mixed state case, then we derive the Wigner function of squeezed number state, which yields negative binomial distribution by virtue of the entangled state representation and the entangled Wigner operator. 展开更多
关键词 IWOP Wigner function negative binomial distribution
下载PDF
Modeling random telegraph signal noise in CMOS image sensor under low light based on binomial distribution 被引量:2
3
作者 张钰 逯鑫淼 +2 位作者 王光义 胡永才 徐江涛 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第7期164-170,共7页
The random telegraph signal noise in the pixel source follower MOSFET is the principle component of the noise in the CMOS image sensor under low light. In this paper, the physical and statistical model of the random t... The random telegraph signal noise in the pixel source follower MOSFET is the principle component of the noise in the CMOS image sensor under low light. In this paper, the physical and statistical model of the random telegraph signal noise in the pixel source follower based on the binomial distribution is set up. The number of electrons captured or released by the oxide traps in the unit time is described as the random variables which obey the binomial distribution. As a result,the output states and the corresponding probabilities of the first and the second samples of the correlated double sampling circuit are acquired. The standard deviation of the output states after the correlated double sampling circuit can be obtained accordingly. In the simulation section, one hundred thousand samples of the source follower MOSFET have been simulated,and the simulation results show that the proposed model has the similar statistical characteristics with the existing models under the effect of the channel length and the density of the oxide trap. Moreover, the noise histogram of the proposed model has been evaluated at different environmental temperatures. 展开更多
关键词 random telegraph signal noise physical and statistical model binomial distribution CMOS image sensor
下载PDF
Negative Binomial Distribution Based Reputation Direct Update for Wireless Sensor Networks
4
作者 Zhe Wei Meng-Shu Hou Fang Wang 《Journal of Electronic Science and Technology》 CAS 2011年第2期161-166,共6页
In the reputation modeling of wireless sensor networks(WSNs) many literatures have proposed creative reputation indirect update methods,such as reputation integration,discounting,aging to eliminate,and filtering mal... In the reputation modeling of wireless sensor networks(WSNs) many literatures have proposed creative reputation indirect update methods,such as reputation integration,discounting,aging to eliminate,and filtering malicious reputation information. However,few have discussed the reputation direct update. In this paper,based on sound statistical theories,a negative binominal distribution method in the reputation direct update for WSNs is proposed. Results show that the proposed method is more suitable and time-saving for the reputation update of the resource constraint WSNs and can improve the computation power efficiency as well. 展开更多
关键词 Beta distribution negative binomial distribution REPUTATION wireless sensor networks
下载PDF
Zero-inflated non-central negative binomial distribution
5
作者 TIAN Wei-zhong LIU Ting-ting YANG Yao-ting 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2022年第2期187-198,共12页
In this article, the zero-inflated non-central negative binomial(ZINNB) distribution is introduced. Some of its basic properties are obtained. In addition, we use the maximum likelihood estimation method to estimate t... In this article, the zero-inflated non-central negative binomial(ZINNB) distribution is introduced. Some of its basic properties are obtained. In addition, we use the maximum likelihood estimation method to estimate the parameters of the ZINNB distribution, and illustrate its application by fitting the actual data sets. 展开更多
关键词 zero-in ated non-central negative binomial distribution maximum likelihood estimation good-ness of fit
下载PDF
Adaptive Update Distribution Estimation under Probability Byzantine Attack
6
作者 Gang Long Zhaoxin Zhang 《Computers, Materials & Continua》 SCIE EI 2024年第10期1667-1685,共19页
The secure and normal operation of distributed networks is crucial for accurate parameter estimation.However,distributed networks are frequently susceptible to Byzantine attacks.Considering real-life scenarios,this pa... The secure and normal operation of distributed networks is crucial for accurate parameter estimation.However,distributed networks are frequently susceptible to Byzantine attacks.Considering real-life scenarios,this paper investigates a probability Byzantine(PB)attack,utilizing a Bernoulli distribution to simulate the attack probability.Historically,additional detection mechanisms are used to mitigate such attacks,leading to increased energy consumption and burdens on distributed nodes,consequently diminishing operational efficiency.Differing from these approaches,an adaptive updating distributed estimation algorithm is proposed to mitigate the impact of PB attacks.In the proposed algorithm,a penalty strategy is initially incorporated during data updates to weaken the influence of the attack.Subsequently,an adaptive fusion weight is employed during data fusion to merge the estimations.Additionally,the reason why this penalty term weakens the attack has been analyzed,and the performance of the proposed algorithm is validated through simulation experiments. 展开更多
关键词 distribution estimation network security least-mean-square binomial distribution probability Byzantine attack
下载PDF
The sixth order cumulant of net-proton number in Binomial distribution at ■ 被引量:1
7
作者 Li-Zhu Chen Ye-Yin Zhao +2 位作者 Jin Wu Zhi-Ming Li Yuan-Fang Wu 《Chinese Physics C》 SCIE CAS CSCD 2021年第10期84-91,共8页
It is proposed that ratios of the sixth order to the second order cumulant(C_(6)/C_(2))of conserved quantities are sensitive to the chiral crossover transition.Recently,the negative C_(6)/C_(2) was obtained in both th... It is proposed that ratios of the sixth order to the second order cumulant(C_(6)/C_(2))of conserved quantities are sensitive to the chiral crossover transition.Recently,the negative C_(6)/C_(2) was obtained in both theoretical Lattice QCD and experiments at■.In this study,we investigate the behavior of net-proton C_(6)/C_(2) in statistical Binomial distribution(BD)at■in Au+Au collisions.With the BD parameters extracted from RHIC/STAR,it is found that C_(6)/C_(2) can be negative.Furthermore,the obtained C_(6)/C_(2) becomes smaller when applying the same magnitude of experimental statistics and calculation method to simulations.In 0-10%centrality,there is a significant difference between the simulated result and theoretical expectation.Based on the extracted parameters and experimentally collected statistics,the baseline of net-proton C_(6)/C_(2) in BD is presented. 展开更多
关键词 the sixth order cumulant net-proton number binomial distribution STATISTICS
原文传递
Estimation of Reliability Derived from Binomial Distribution in Zero-Failure Data 被引量:1
8
作者 韩明 《Journal of Shanghai Jiaotong university(Science)》 EI 2015年第4期454-457,共4页
This paper introduces a new method, E-Bayesian estimation method, to estimate the reliability in zero-failure data. The definition of E-Bayesian estimation of the reliability is given. Based on the definition,the form... This paper introduces a new method, E-Bayesian estimation method, to estimate the reliability in zero-failure data. The definition of E-Bayesian estimation of the reliability is given. Based on the definition,the formulas of E-Bayesian estimation and hierarchical Bayesian estimation of the reliability are provided, and property of the E-Bayesian estimation, i.e. relation between E-Bayesian estimation and hierarchical Bayesian estimation, is discussed. Calculations performed on practical problems show that the proposed new method is feasible and easy to operate. 展开更多
关键词 reliability engineering binomial distribution zero-failure data E-Bayesian estimation hierarchical Bayesian estimation
原文传递
BAYESIAN DEMONSTRATION TEST METHOD WITH MIXED BETA DISTRIBUTION 被引量:6
9
作者 MING Zhimao TAO Junyong +1 位作者 CHEN Xun ZHANG Yun'an 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2008年第3期116-119,共4页
A complex mechatronics system Bayesian plan of demonstration test is studied based on the mixed beta distribution. During product design and improvement various information is appropriately considered by introducing i... A complex mechatronics system Bayesian plan of demonstration test is studied based on the mixed beta distribution. During product design and improvement various information is appropriately considered by introducing inheritance factor, moreover, the inheritance factor is thought as a random variable, and the Bayesian decision of the qualification test plan is obtained, and the correctness of a Bayesian model presented is verified. The results show that the quantity of the test is too conservative according to classical methods under small binomial samples. Although traditional Bayesian analysis can consider test information of related or similar products, it ignores differences between such products. The method has solved the above problem, furthermore, considering the requirement in many practical projects, the differences among this method, the classical method and Bayesian with beta distribution are compared according to the plan of reliability acceptance test. 展开更多
关键词 Reliability qualification test Inheritance factor Bayesian analysis binomial distribution Maximum posterior risk
下载PDF
Confidence Intervals for the Binomial Proportion: A Comparison of Four Methods
10
作者 Luke Akong’o Orawo 《Open Journal of Statistics》 2021年第5期806-816,共11页
This paper presents four methods of constructing the confidence interval for the proportion <i><span style="font-family:Verdana;">p</span></i><span style="font-family:;" ... This paper presents four methods of constructing the confidence interval for the proportion <i><span style="font-family:Verdana;">p</span></i><span style="font-family:;" "=""><span style="font-family:Verdana;"> of the binomial distribution. Evidence in the literature indicates the standard Wald confidence interval for the binomial proportion is inaccurate, especially for extreme values of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">. Even for moderately large sample sizes, the coverage probabilities of the Wald confidence interval prove to be erratic for extreme values of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;">. Three alternative confidence intervals, namely, Wilson confidence interval, Clopper-Pearson interval, and likelihood interval</span></span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> are compared to the Wald confidence interval on the basis of coverage probability and expected length by means of simulation.</span> 展开更多
关键词 binomial distribution Confidence Interval Coverage Probability Expected Length Relative Likelihood Function
下载PDF
CONDITIONAL RECURSIVE EQUATIONS ON EXCESS-OF-LOSS REINSURANCE
11
作者 杨静平 王晓谦 程士宏 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2006年第8期1071-1080,共10页
The rharginal recursive equations on excess-of-loss reinsurance treaty are investignted, under the assumption that the number of claims belongs to the family consisting of Poisson, binomial and negative binomial, and ... The rharginal recursive equations on excess-of-loss reinsurance treaty are investignted, under the assumption that the number of claims belongs to the family consisting of Poisson, binomial and negative binomial, and that the severity distribution has bounded continuous density function. On conditional of the numbers of claims associated with the reinsurer and the cedent, some recursive equations are obtained for the marginal distributions of the total payments of the reinsurer and the cedent. 展开更多
关键词 Panjer recursion Poisson distribution binomial distribution negative binomial distribution excess-of-loss reinsurance
下载PDF
An Informational Approach to The Sinusoidal Law of Photon Polarization
12
作者 LUOShun-Long 《Communications in Theoretical Physics》 SCIE CAS CSCD 2002年第3期281-284,共4页
The photon polarization law p(theta) = sin(2)theta is derived from a simple informational consideration by two methods: The first is via an intuitive principle of minimum Fisher information, the second is via a symmet... The photon polarization law p(theta) = sin(2)theta is derived from a simple informational consideration by two methods: The first is via an intuitive principle of minimum Fisher information, the second is via a symmetry and invariance argument. The results demonstrate that in photon polarization, Nature has a tendency to hide herself as deep as possible while obeying some regular conditions. 展开更多
关键词 photon polarization Fisher information Cramer-Rao bound two-person game binomial distribution
下载PDF
A spatially-explicit count data regression for modeling the density of forest cockchafer(Melolontha hippocastani) larvae in the Hessian Ried(Germany)
13
作者 Matthias Schmidt Rainer Hurling 《Forest Ecosystems》 SCIE CAS 2014年第4期185-200,共16页
Background: In this paper, a regression model for predicting the spatial distribution of forest cockchafer larvae in the Hessian Ried region (Germany) is presented. The forest cockchafer, a native biotic pest, is a... Background: In this paper, a regression model for predicting the spatial distribution of forest cockchafer larvae in the Hessian Ried region (Germany) is presented. The forest cockchafer, a native biotic pest, is a major cause of damage in forests in this region particularly during the regeneration phase. The model developed in this study is based on a systematic sample inventory of forest cockchafer larvae by excavation across the Hessian Ried. These forest cockchafer larvae data were characterized by excess zeros and overdispersion. Methods: Using specific generalized additive regression models, different discrete distributions, including the Poisson, negative binomial and zero-inflated Poisson distributions, were compared. The methodology employed allowed the simultaneous estimation of non-linear model effects of causal covariates and, to account for spatial autocorrelation, of a 2-dimensional spatial trend function. In the validation of the models, both the Akaike information criterion (AIC) and more detailed graphical procedures based on randomized quantile residuals were used. Results: The negative binomial distribution was superior to the Poisson and the zero-inflated Poisson distributions, providing a near perfect fit to the data, which was proven in an extensive validation process. The causal predictors found to affect the density of larvae significantly were distance to water table and percentage of pure clay layer in the soil to a depth of I m. Model predictions showed that larva density increased with an increase in distance to the water table up to almost 4 m, after which it remained constant, and with a reduction in the percentage of pure clay layer. However this latter correlation was weak and requires further investigation. The 2-dimensional trend function indicated a strong spatial effect, and thus explained by far the highest proportion of variation in larva density. Conclusions: As such the model can be used to support forest practitioners in their decision making for regeneration and forest protection planning in the Hessian predicting future spatial patterns of the larva density is still comparatively weak. Ried. However, the application of the model for somewhat limited because the causal effects are 展开更多
关键词 Forest cockchafer LARVAE Negative binomial distribution Poisson distribution Zerc〉-inflated poissondistribution Systematic sample inventory Generalized additive model Spatial autocorrelation Randomizedquantile residuals
下载PDF
Progress in Theoretical Research on Reliability for China's Space Engineering
14
作者 He GuoweiMinistry of Aero-Space Industry, P.O. Box 838 Beijing (100830), China 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 1991年第1期1-28,共28页
With the support of the Fundamental Reliability Theoretical Research (FRTR) Foundation of the Quality Control Bureau of Ministry of Astronautics (MOA), PRC, 9 Chinese institutes and universities have worked for years ... With the support of the Fundamental Reliability Theoretical Research (FRTR) Foundation of the Quality Control Bureau of Ministry of Astronautics (MOA), PRC, 9 Chinese institutes and universities have worked for years on reliability statistics problems pending to be solved in space research and development. This paper gives a brief review of our main research results, including (1) Results on Normal Distributions; (2) Results on Weibull Distributions; (3) Results on the Synthesisof System Reliability-Theoretical Method; (4) Results on the Synthesis of System Reliability-Approximation Method: Binomial Distribution, Exponential Distribution, Weibull Distribution, Parallel System, General Cases; (5) Structual Reliability; (6) Zero-Failure Reliability Estimation; (7) Storage Life and Others. All these results can be acquired from the Quality Control Bureau of the Ministry of Aero-Space Industry (MAS). 展开更多
关键词 Normal distribution Weibull distribution binomial distribution Exponential distribution Parallel system Structural reliability Zero-failure reliability estimation Storage life System reliability synthesis Reliability theory.
下载PDF
A Stochastic Strategy for Optimizing the Cost of Systematic Screening of Some Diseases in a Situation of Insufficient Equipment
15
作者 Lucien Zihindula Biguru 《Applied Mathematics》 2020年第12期1253-1274,共22页
In this work, we show that when there is insufficient equipment for detecting a disease whose prevalence is <em>t</em>% in a sub-population of size <em>N</em>, it is optimal to divide the <e... In this work, we show that when there is insufficient equipment for detecting a disease whose prevalence is <em>t</em>% in a sub-population of size <em>N</em>, it is optimal to divide the <em>N</em> samples into <em>n</em> groups of size r each and then, the value <img src="Edit_ce149849-3742-48fe-820b-02ccc0c92d83.bmp" alt="" /> allows systematic screening of all <em>N</em> individuals by performing less than <em>N</em> tests (In this expression, <img src="Edit_987eb236-a883-4894-ba2d-52bde5f35056.bmp" alt="" /> represents the floor function<sup>1</sup> of <em>x</em> ∈ R). Based on this result and on certain functions of the R software, we subsequently propose a probabilistic strategy capable of optimizing the screening tests under certain conditions. 展开更多
关键词 Stochastic Optimization binomial distribution Systematic Screening PREVALENCE R Software
下载PDF
Efficiency of Some Estimators for a Generalized Poisson Autoregressive Process of Order 1
16
作者 Louis G. Doray Andrew Luong El-Halla Najem 《Open Journal of Statistics》 2016年第4期637-650,共14页
Various models have been proposed in the literature to study non-negative integer-valued time series. In this paper, we study estimators for the generalized Poisson autoregressive process of order 1, a model developed... Various models have been proposed in the literature to study non-negative integer-valued time series. In this paper, we study estimators for the generalized Poisson autoregressive process of order 1, a model developed by Alzaid and Al-Osh [1]. We compare three estimation methods, the methods of moments, quasi-likelihood and conditional maximum likelihood and study their asymptotic properties. To compare the bias of the estimators in small samples, we perform a simulation study for various parameter values. Using the theory of estimating equations, we obtain expressions for the variance-covariance matrices of those three estimators, and we compare their asymptotic efficiency. Finally, we apply the methods derived in the paper to a real time series. 展开更多
关键词 Discrete Time Series Autoregressive Process Moment Estimator QUASI-LIKELIHOOD EFFICIENCY Generalized Poisson Quasi binomial distribution
下载PDF
Mathematical Challenges to Macroevolution
17
作者 John B. Andelin 《Journal of Applied Mathematics and Physics》 2022年第11期3385-3391,共7页
The theory of evolution was advanced by Darwin in 1859, prior to Mendel’s experiments demonstrating the particulate nature of inheritance. The modern synthesis was formulated in the early 1940s, well before the conce... The theory of evolution was advanced by Darwin in 1859, prior to Mendel’s experiments demonstrating the particulate nature of inheritance. The modern synthesis was formulated in the early 1940s, well before the concept of coded information was understood. This paper outlines four mathematical challenges to the modern synthesis, which are based on current understanding of the proposed mechanisms of evolutionary change within the constraints of experimental molecular biology. 展开更多
关键词 Evolution Convergence PROBABILITY binomial distribution Formula Ex Post Facto Probability Post-Hoc Probability Modern Synthesis
下载PDF
Slow Particle Production in Nucleus-Nucleus Collisions at Relativistic Energies
18
作者 Mir Hashim Rasool Mohammad Ayaz Ahmad Shafiq Ahmad 《Journal of Modern Physics》 2016年第1期51-64,共14页
In this paper an effort has been made to study the general characteristics of slow particles produced in the interactions of 32S-Em at 200 AGeV to extract the information about the mechanism of particle production. Th... In this paper an effort has been made to study the general characteristics of slow particles produced in the interactions of 32S-Em at 200 AGeV to extract the information about the mechanism of particle production. The results have been compared with the experimental results obtained by other workers. The multiplicity distributions of the slow target associated particles (black, grey and heavy tracks) produced by 32S-beam with different targets have been studied. Also several types of correlations among them have been investigated. The variation of the produced particles with projectile mass number and target size has been studied. Also the multiplicity distributions of slow particles with NBD fits are presented and scaling multiplicity distributions of slow particles produced have been studied in order to check the validity of KNO-scaling. 展开更多
关键词 Relativistic Heavy-Ion Collisions Nuclear Emulsion Multiplicity distribution Multiplicity Correlations KNO Scaling Negative binomial distribution
下载PDF
Minimum Density Power Divergence Estimator for Negative Binomial Integer-Valued GARCH Models
19
作者 Lanyu Xiong Fukang Zhu 《Communications in Mathematics and Statistics》 SCIE 2022年第2期233-261,共29页
In this paper,we study a robust estimation method for the observation-driven integervalued time-series models in which the conditional probability mass of current observations is assumed to follow a negative binomial ... In this paper,we study a robust estimation method for the observation-driven integervalued time-series models in which the conditional probability mass of current observations is assumed to follow a negative binomial distribution.Maximum likelihood estimator is highly affected by the outliers.We resort to the minimum density power divergence estimator as a robust estimator and showthat it is strongly consistent and asymptotically normal under some regularity conditions.Simulation results are provided to illustrate the performance of the estimator.An application is performed on data for campylobacteriosis infections. 展开更多
关键词 Integer-valued GARCH model Minimum density power divergence estimator Negative binomial distribution Robust estimation
原文传递
Approximation for counts of head runs
20
作者 ZHANG Mei 《Science China Mathematics》 SCIE 2011年第2期311-324,共14页
In this paper, we study the count of head runs up to a fixed time in a two-state stationary Markov chain. We prove that in total variance distance, the negative binomial, Poisson and binomial distributions are appropr... In this paper, we study the count of head runs up to a fixed time in a two-state stationary Markov chain. We prove that in total variance distance, the negative binomial, Poisson and binomial distributions are appropriate approximations according to the relation of the variance and mean of the count, generalizing earlier results in previous literatures. The proof is based on Stein's method and coupling. 展开更多
关键词 head run negative binomial distribution Poisson distribution binomial distribution Stein's method total variation distance coupling
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部