期刊文献+
共找到78篇文章
< 1 2 4 >
每页显示 20 50 100
Deep Belief Network for Lung Nodule Segmentation and Cancer Detection
1
作者 Sindhuja Manickavasagam Poonkuzhali Sugumaran 《Computer Systems Science & Engineering》 SCIE EI 2023年第10期135-151,共17页
Cancer disease is a deadliest disease cause more dangerous one.By identifying the disease through Artificial intelligence to getting the mage features directly from patients.This paper presents the lung knob division ... Cancer disease is a deadliest disease cause more dangerous one.By identifying the disease through Artificial intelligence to getting the mage features directly from patients.This paper presents the lung knob division and disease characterization by proposing an enhancement calculation.Most of the machine learning techniques failed to observe the feature dimensions leads inaccuracy in feature selection and classification.This cause inaccuracy in sensitivity and specificity rate to reduce the identification accuracy.To resolve this problem,to propose a Chicken Sine Cosine Algorithm based Deep Belief Network to identify the disease factor.The general technique of the created approach includes four stages,such as pre-processing,segmentation,highlight extraction,and the order.From the outset,the Computerized Tomography(CT)image of the lung is taken care of to the division.When the division is done,the highlights are extricated through morphological factors for feature observation.By getting the features are analysed and the characterization is done dependent on the Deep Belief Network(DBN)which is prepared by utilizing the proposed Chicken-Sine Cosine Algorithm(CSCA)which distinguish the lung tumour,giving two classes in particular,knob or non-knob.The proposed system produce high performance as well compared to the other system.The presentation assessment of lung knob division and malignant growth grouping dependent on CSCA is figured utilizing three measurements to be specificity,precision,affectability,and the explicitness. 展开更多
关键词 Chicken-sine cosine algorithm deep belief network lung cancer Subject classification codes artificial intelligence machine learning segmentation
下载PDF
THE SURVIVAL PROBABILITY IN FINITE TIME PERIOD IN FULLY DISCRETE RISK MODEL 被引量:15
2
作者 ChengShixue WuBiao 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第1期67-74,共8页
The probabilities of the following events are first discussed in this paper: the insurance company survives to any fixed time k and the surplus at time k equals x≥1 . The formulas for calculating such prob... The probabilities of the following events are first discussed in this paper: the insurance company survives to any fixed time k and the surplus at time k equals x≥1 . The formulas for calculating such probabilities are deduced through analytical and probabilistic arguments respectively. Finally, other probability laws relating to risk are determined based on the probabilities mentioned above. 展开更多
关键词 1991 MR Subject classification 60K30 90A46
下载PDF
MOMENT ESTIMATION FOR MULTIVARIATE EXTREME VALUE DISTRIBUTION 被引量:9
3
作者 SHI DAOJI 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1995年第1期61-68,共8页
Moment estimation for multivariate extreme value distribution is describedin this paper. Asymptotic covariance matrix of the estimators is given. The relativeefficiencies of moment estimators as compared with the maxi... Moment estimation for multivariate extreme value distribution is describedin this paper. Asymptotic covariance matrix of the estimators is given. The relativeefficiencies of moment estimators as compared with the maximum likelihood and thestepwise estimators are computed. We show that when there is strong dependencebetween the variates, the generalized variance of moment estimators is much lower thanthe stepwise estimators. It becomes more obvious when the dimension increases. 展开更多
关键词 1991 MR Subject classification 62H12 62F12
下载PDF
The Explicit Solution to Equation AX + X B = C in Matrices 被引量:4
4
作者 YOU Xing-hua MA Sheng-rong YAN Shi-jian 《Chinese Quarterly Journal of Mathematics》 CSCD 2009年第4期516-524,共9页
Abstract: At first one of g-inverses of A (×) In+Im(×) BT is given out, then the explicit solution to matrix equation AX + XB = C is gained by using the method of matrix decomposition, finally, a nume... Abstract: At first one of g-inverses of A (×) In+Im(×) BT is given out, then the explicit solution to matrix equation AX + XB = C is gained by using the method of matrix decomposition, finally, a numerical example is obtained. 展开更多
关键词 matrix equation g-inverse explicit solution FORMULAE Jordan canonical form 2000 MR Subject classification 15A24 65F10
下载PDF
ASYMPTOTIC EFFICIENT ESTIMATION IN SEMIPARAMETRIC NONLINEAR REGRESSION MODELS 被引量:4
5
作者 Zhu Zhongyi\ Wei Bocheng 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第1期57-66,共10页
Abstract In this paper, the estimation method based on the “generalized profile likelihood” for the conditionally parametric models in the paper given by Severini and Wong (1992) is extended to fixed design semipara... Abstract In this paper, the estimation method based on the “generalized profile likelihood” for the conditionally parametric models in the paper given by Severini and Wong (1992) is extended to fixed design semiparametric nonlinear regression models.For these semiparametric nonlinear regression models,the resulting estimator of parametric component of the model is shown to be asymptotically efficient and the strong convergence rate of nonparametric component is investigated.Many results (for example Chen (1988),Gao & Zhao (1993), Rice (1986) et al.) are extended to fixed design semiparametric nonlinear regression models. 展开更多
关键词 1991 MR Subject classification 62G07 62F35
下载PDF
NOTE ON CALCULATING WIENER NUMBERS OF MOLECULAR GRAPHS WITH SYMMETRY 被引量:2
6
作者 LiHuaien ZhangFuji 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第2期191-196,共6页
The authors provided a simple method for calculating Wiener numbers of molecular graphs with symmetry in 1997.This paper intends to further improve on it and simplifies the calculation of the Wiener numbers of the mol... The authors provided a simple method for calculating Wiener numbers of molecular graphs with symmetry in 1997.This paper intends to further improve on it and simplifies the calculation of the Wiener numbers of the molecular graphs. 展开更多
关键词 1991 MR Subject classification 05C12 KEYWORDS Wiener number point group molecular graph
下载PDF
WAVELET ESTIMATION IN NONPARAMETRIC MODEL UNDER MARTINGALE DIFFERENCE ERRORS 被引量:3
7
作者 梁汉营 张冬霞 吕保献 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2004年第3期302-310,共9页
This paper is concerned with the heteroscedastic regression model Y i=g(x i)+σ iei(1?i?n) under correlated errors e i, where it is assumed that σ i Emphasis>/2 =f(u i), the design points (x i, ui) are known and n... This paper is concerned with the heteroscedastic regression model Y i=g(x i)+σ iei(1?i?n) under correlated errors e i, where it is assumed that σ i Emphasis>/2 =f(u i), the design points (x i, ui) are known and nonrandom, and g and f are unknown functions. Assuming that unobserved disturbances e i are martingale differences. The strong uniform convergence rates and r-th moment uniform convergence rates of wavelet estimator of g are investigated. Also, the strong uniform convergence rates are discussed for wavelet estimator of f. MR Subject Classification 62G05 Keywords regression function - martingale difference error - wavelet estimator - uniform convergence rate Partially supported by the National Natural Science Foundation of China (10171079). 展开更多
关键词 MR Subject classification 62G05
下载PDF
P_3-FACTORIZATION OF COMPLETE MULTIPARTITE GRAPHS 被引量:3
8
作者 Du Beiliang 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第1期122-124,共3页
In this note it is shown that a necessary and sufficient condition for the existence of a P 3 factorization of complete multipartite graph λK n m is (1) m≥3, (2) mn≡0 (mod 3) and (3) λ(m-1)n≡0 ... In this note it is shown that a necessary and sufficient condition for the existence of a P 3 factorization of complete multipartite graph λK n m is (1) m≥3, (2) mn≡0 (mod 3) and (3) λ(m-1)n≡0 (mod 4). 展开更多
关键词 1991 MR Subject classification 05B30 05C70
下载PDF
THE MULTIFIT ALGORITHM FOR SET PARTITIONING CONTAINING KERNELS 被引量:3
9
作者 He Yong 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第2期227-232,共6页
Abstract This paper investigates the set partitioning containing kernels. This problem can also be considered as the identical machine scheduling problem with nonsimultaneous machine release times. That the algorithm ... Abstract This paper investigates the set partitioning containing kernels. This problem can also be considered as the identical machine scheduling problem with nonsimultaneous machine release times. That the algorithm MULTIFIT has a worst case bound of 6/5 is proved. Through combining MULTIFIT and LPT, an algorithm MULTILPT with a worst case bound of 7/6 has been obtained. 展开更多
关键词 1991 MR Subject classification 90B35 68C15
下载PDF
ON THE EXISTENCE OF PERIODIC SOLUTIONS FOR THE THIRD-ORDER NONLINEAR ORDINARY DIFFERENTIAL EQUATIONS 被引量:5
10
作者 Huang Xiankai 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第2期125-130,共6页
Abstract In this paper,the existence of periodic solution for the third order nonlinear ordinary differential equation of the form x…+f()+g()+h(x)=p(t) is considered,where f,g,h and p are the continuous f... Abstract In this paper,the existence of periodic solution for the third order nonlinear ordinary differential equation of the form x…+f()+g()+h(x)=p(t) is considered,where f,g,h and p are the continuous functions,and p(t+T)=p(t). By using the Leray Schauder degree method,some sufficient conditions to guarantee the existence of T periodic solution for the equation are obtained.Some previous results are extended and improved. 展开更多
关键词 1991 MR Subject classification 34B15
下载PDF
SOME PROPERTIES OF THE SPECTRUM OF GRAPHS 被引量:2
11
作者 Chang An 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第1期103-107,共5页
Let G be a graph and denote by Q(G)=D(G)+A(G),L(G)=D(G)-A(G) the sum and the difference between the diagonal matrix of vertex degrees and the adjacency matrix of G, respectively.In this paper,some properties ... Let G be a graph and denote by Q(G)=D(G)+A(G),L(G)=D(G)-A(G) the sum and the difference between the diagonal matrix of vertex degrees and the adjacency matrix of G, respectively.In this paper,some properties of the matrix Q(G) are studied.At the same time,a necessary and sufficient condition for the equality of the spectrum of Q(G) and L(G) is given. 展开更多
关键词 1991 MR Subject classification 05C50
下载PDF
ON A TWO-POINT BOUNDARY VALUE PROBLEM OF DUFFING TYPE EQUATION WITH DIRICHLET CONDITIONS 被引量:2
12
作者 HuangWenhua ShenZuhe 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第2期131-136,共6页
Abstract An existence and uniqueness result concerned with the Dirichlet boundary value problem u″+cu′+g(t,u)=e(t),u(0)=u(π)=0 is offered.
关键词 1991 MR Subject classification 34B15
下载PDF
A CLASS OF FUNCTIONAL EQUATION AND FRACTAL INTERPOLATION FUNCTIONS 被引量:2
13
作者 Sha Zhen 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第1期90-98,共9页
Abstract A new class of functional equation in C 0(I) is investigated. It is proved that some class of FIF satisfies the functional equation. Another functional equation is constructed. Their solutions can approxi... Abstract A new class of functional equation in C 0(I) is investigated. It is proved that some class of FIF satisfies the functional equation. Another functional equation is constructed. Their solutions can approximate FIF arbitrarily. And a new approximate estimate between FIF and interpolated function is given. 展开更多
关键词 1991 MR Subject classification 28A80 41A05
下载PDF
THE FIRST BOUNDARY VALUE PROBLEM FOR STRONGLY DEGENERATE QUASILINEAR PARABOLIC EQUATIONS IN ANISOTROPIC SOBOLEV SPACES 被引量:1
14
作者 招燕燕 陈祖墀 《Acta Mathematica Scientia》 SCIE CSCD 2006年第2期255-264,共10页
This article concerns the existence of weak solutions of the first boundary value problem for a kind of strongly degenerate quasilinear parabolic equation in the anisotropic Sobolev Space. With the theory of anisotrop... This article concerns the existence of weak solutions of the first boundary value problem for a kind of strongly degenerate quasilinear parabolic equation in the anisotropic Sobolev Space. With the theory of anisotropic Sobolev spaces an existence result is proved. 展开更多
关键词 Weak solution strongly degenerate quasilinear parabolic equation 2000 MR Subject classification 35K55 35K60 35K65
下载PDF
COEFFICIENT MULTIPLIERS ON MIXED NORM SPACES 被引量:1
15
作者 岳修奎 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2004年第3期252-256,共5页
This paper describes the characteristics of the coefficient multipliers of mixed norm spaces A p,q,α with 0<p≤1, 0<q,α<∞ into some analytic function spaces. In corollaries, the characteristics of the coef... This paper describes the characteristics of the coefficient multipliers of mixed norm spaces A p,q,α with 0<p≤1, 0<q,α<∞ into some analytic function spaces. In corollaries, the characteristics of the coefficient multipliers of G p (0<p<1) and A p (0<p≤1) into some analytic function spaces are given. MR Subject Classification 30D - 30H05 - 46E Keywords analytic function space - Hadamard product - multiplier - operator 展开更多
关键词 MR Subject classification 30D 30H05 46E
下载PDF
DOMAIN DECOMPOSITION METHOD FOR PARABOLIC EQUATION ON GENERAL DOMAIN 被引量:1
16
作者 RUI HONGXING 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1995年第1期25-34,共10页
The nonoverlapping domain decomposition method for parabolic partialdifferential equation on general domain is considered. A kind of domain decompositionthat uses the finite element procedure is given. The problem ove... The nonoverlapping domain decomposition method for parabolic partialdifferential equation on general domain is considered. A kind of domain decompositionthat uses the finite element procedure is given. The problem over the domains can beimplemented on parallel computer. Convergence analysis is also presented. 展开更多
关键词 1991 MR Subject classification 65N15 65N55 65N30
下载PDF
Improvement of the minimal residual method for solving nonsymmetric linear systems 被引量:1
17
作者 张居丽 蒋尔雄 《Journal of Shanghai University(English Edition)》 CAS 2007年第4期332-335,共4页
In this paper, the minimal residual (MRES) method for solving nonsymmetric equation systems was improved, the recurrence relation was deduced between the approximate solutions of the linear equation system Ax = b, a... In this paper, the minimal residual (MRES) method for solving nonsymmetric equation systems was improved, the recurrence relation was deduced between the approximate solutions of the linear equation system Ax = b, and a more effective method was presented, which can reduce the operational count and the storage. 展开更多
关键词 nonsymmetric matrix minimal residual (MRES) method the recurrence relation between approximate solutions.2000 Mathematics Subject classification 65F10
下载PDF
A SOLUTION TO A PROBLEM OF GARGANO, LEWINTER AND MALERBA 被引量:1
18
作者 Zverovich I E 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2004年第3期239-244,共6页
A labeled graph is an ordered pair (G, L) consisting of a graph G and its labeling L: V(G) → {1, 2, ..., n}, where n=|V(G)|. An increasing nonconsecutive path in a labeled graph (G, L) is a path (u 1, u 2, ..., u k)... A labeled graph is an ordered pair (G, L) consisting of a graph G and its labeling L: V(G) → {1, 2, ..., n}, where n=|V(G)|. An increasing nonconsecutive path in a labeled graph (G, L) is a path (u 1, u 2, ..., u k), k≥1, in G such that L(u i)+1<L(u i+1) for all i=1, 2, ..., k?1. The total number of increasing nonconsecutive paths in (G, L) is denoted by d(G, L). The following open problem was proposed by Gargano, Lewinter and Malerba: obtaining a labeling L that produces the largest d(P n, L), where P n is a path of order n. Such a labeling is called optimal. The author have solved this problem. For each n ≥ 5 and for n=3, there are exactly four optimal labelings. Either of P 2, P 4 has exactly two optimal labelings. MR Subject Classification 05C38 Keywords labeled graph - increasing nonconsecutive paths 展开更多
关键词 MR Subject classification 05C38
下载PDF
INFLUENCE ANALYSIS ON LINEAR MODELS WITH RANDOM EFFECTS 被引量:1
19
作者 Zhong Xuping\ Wei Bocheng 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第2期169-176,共8页
In this paper,a unified diagnostic method for linear models with random effects based upon the joint likelihood given by Robinson (in 1991) is presented.The case deletion model is equivalent to mean shift outlier mode... In this paper,a unified diagnostic method for linear models with random effects based upon the joint likelihood given by Robinson (in 1991) is presented.The case deletion model is equivalent to mean shift outlier model,as well as case weights model.From this point of view,several new diagnostic measures,such as Cook distance, WK diagnostics are derived.Some previous results are improved.Numerical examples illustrate the method is available. 展开更多
关键词 1991 MR Subject classification 62F25
下载PDF
ENUMERATION OF ROOTED PLANAR HALIN MAPS 被引量:1
20
作者 Ren Han\ Liu Yanpei 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 1999年第1期117-121,共5页
Abstract A Halin map is a kind of planar maps oriented by a tree. In this paper the rooted halin maps with the vertex partition as parameters are enumerated such that a famous result on rooted trees due to Harary, Pri... Abstract A Halin map is a kind of planar maps oriented by a tree. In this paper the rooted halin maps with the vertex partition as parameters are enumerated such that a famous result on rooted trees due to Harary, Prins, and Tutte is deduced as a special case. Further, by using Lagrangian inversion to obtain a number of summation free formulae directly, the various kinds of rooted Halin maps with up to three parameters have been counted. 展开更多
关键词 1991 MR Subject classification 05C45
下载PDF
上一页 1 2 4 下一页 到第
使用帮助 返回顶部