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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Direct sampling method to inverse wave-number-dependent source problems: determination of the support of a stationary source
反波数 相关源问题 直接采样 固定源
2023/11/29
This talk is concerned with a direct sampling method for imaging the support of a frequency-dependent source term embedded in a homogeneous and isotropic medium. The source term is given by the Fourie...
Determination of Integral Cayley Graphs on Finite Abelian Groups
abelian group character cayley graph integral graph
2012/6/21
A graph is integral means that all its eigenvalues are integers. In this note, we determine all the integral Cayley graphs on finite abelian groups. Moreover, we calculate the the number of integral C...
Matrix algorithm for determination of the elementary paths and elementary circuits using exotic semirings
idempotent semiring semiring of distinguished languages elementary path
2012/4/18
We propose a new method for determining the elementary paths and elementary circuits in a directed graph. Also, the Hamiltonian paths and Hamiltonian circuits are enumerated.
Formulae for the determination of the elements of the Eotvos matrix of the Earth's normal gravity field and a relation between normal and actual Gaussian curvature
Eotvos matrix normal gravity field equipotential surfaces Gauss curvature plumbline curvature
2011/9/1
Abstract: In this paper we form relations for the determination of the elements of the E\"otv\"os matrix of the Earth's normal gravity field. In addition a relation between the Gauss curvature of the ...
Innovative observing strategy and orbit determination for Low Earth Orbit Space Debris
Low Earth Orbit Space Debris orbit determination
2011/9/9
We present the results of a large scale simulation, reproducing the behavior of a data center for the build-up and maintenance of a complete catalog of space
debris in the upper part of the low Earth...
Determination of the Integrated Sidelobe Level of Sets of Rotated Legendre Sequences
Determination of the Integrated Sidelobe Level Sets of Rotated Legendre Sequences
2011/2/21
Sequences sets with low aperiodic auto- and crosscorrelations play an important role in many applications like communications, radar and other active sensing applications.
Research Note on a Parabolic Heat-Balance Integral Method with Unspecified Exponent: An Entropy Generation Approach in Optimal Profile Determination
Research Note on a Parabolic Heat-Balance Integral Method Unspecified Exponent Entropy Generation Optimal Profile Determination
2011/1/20
The heat-bal ance in te gral method of Good man is stud ied with two sim ple 1-D heat con duc tion prob lems with pre scribed tem per a ture and flux bound ary con di tions.These clas si cal prob lems...
A Package of Programs for Determination of Some Classes of Subgroupoids
groupoid disjoint unions of groupoids subgroupoid
2011/1/17
In this paper we give three programs on computer for finding the subgroupoids, wide subgroupoids and normal subgroupoids of a finite groupoid.Applying these programs for groups, we can determine all s...
Orbit determination of space objects based on sparse optical data
orbit determination space debris
2011/3/4
While building up a catalog of Earth orbiting objects, if the available optical observations
are sparse, not deliberate follow ups of specific objects, no orbit determination is possible
without pre...
Using exploratory factor analysis model (EFA) for determination the main factors of train's accidents in Egypt (APPLIED STUDY)
Train’s Accidents Multivariate analysis Factor Analysis
2010/9/26
Factor analysis (FA) is used to summarize the data covariance structure in a few dimensions of the data. FA attempts to identify underlying variables that explain the pattern of correlations within a ...
Determination of the number of isomorphism classes of extensions of a $\kp$-adic field
extensions $\kp$-adic field
2010/11/8
We deduce a formula enumerating the isomorphism classes of extensions of a $\kp$-adic field $K$ with given ramification $e$ and inertia $f$. The formula follows from a simple group-theoretic lemma, pl...
Determination of time-dependent coefficients for a hyperbolic inverse problem
time-dependent coefficients hyperbolic inverse problem
2010/12/9
We consider an inverse boundary value problem for the hyperbolic partial differential equation
(−i@t+A0(t, x))2u(t, x)−Xn j=1−i@xj+Aj(t, x)2 u(t, x)+V (t, x)u(t, x) = 0 w...
A (k, g)-graph is a k-regular graph of girth g, and a (k, g)-cage is a (k, g)-graph of mini-
mum order. We show that a (3,11)-graph of order 112 found by Balaban in 1973 is minimal and unique. We als...
Analytical Determination of Fractal Structure in Stochastic Time Series
Fractal Structure Stochastic Time Series
2010/4/8
Current methods for determining whether a time series exhibits fractal structure (FS) rely on subjective assessments on estimators of the Hurst exponent (H). Here, I introduce the Bayesian Assessment ...
Determination of maximum entropy probability distribution via Burg's measure of entropy
Burg’s measure of entropy Maximum entropy principle Wavelet
2010/9/14
In this paper, we consider the methods of obtaining maximum entropy multivariate distributions via Burg’s measure of entropy under the constraints that the marginal distributions or the marginals and ...