Results 11 to 20 of about 4,018,839 (226)
The Decomposition of Tree-Ring Series for Environmental Studies
, 1987 Signal extraction in tree-ring research is considered as a general time series decomposition problem. A linear aggregate model for a hypothetical ring-width series is proposed, which allows the problem to be reduced to the estimation and extraction of ...
Cook, Edward R.
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Identifying Low-Frequency Tree-Ring Variation
, 1991 I propose an approach to provide 95% confidence intervals for a chronology of low-frequency tree-ring variation so that a level of significance or importance for trends can be inferred.
Sheppard, Paul R.
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Revised Computer Programs for Tree-Ring Research
, 1979 Three computer programs that are basic to the processing and development of tree -ring chronologies are now available. They were designed to refine and replace older programs that were previously furnished by the laboratory.
Graybill, Donald A.
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Notes on the zero-divisor graph and annihilating-ideal graph of a reduced ring
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2021 We translate some graph properties of 𝔸𝔾(R) and Γ(R) to some topological properties of Zariski topology. We prove that the facts “(1) The zero ideal of R is an anti fixed-place ideal. (2) Min(R) does not have any isolated point. (3) Rad(𝔸𝔾 (R)) = 3.
Badie Mehdi
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Energies, 2020 The demand for high-speed servomotors is increasing, and minimal losses in both high-speed and high-torque regions are required. Copper loss reduction in permanent magnet motors can be achieved by configuring concentrated winding, but there are more ...
Mitsuhide Sato +7 more
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On orthogonal completion of reduced rings [PDF]
Pacific Journal of Mathematics, 1983 It is known that the relation \(a\leq b\) if \(a\cdot b=a^ 2\) defined for reduced rings R (rings with no nonzero nilpotent elements) makes R into a partially ordered multiplicative semigroup. A subset X of R is called an orthogonal subset of R if for x,\(y\in X\), \(x\neq y\) implies \(x\cdot y=0\).
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On reduced archimedean skew power series rings [PDF]
Journal of Algebra and Its Applications, 2020 In this paper, we prove that if [Formula: see text] is an Archimedean reduced ring and satisfy ACC on annihilators, then [Formula: see text] is also an Archimedean reduced ring. More generally, we prove that if [Formula: see text] is a right Archimedean ring satisfying the ACC on annihilators and [Formula: see text] is a rigid automorphism of [Formula:
Mousavi, Hamed +2 more
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Tree-Ring Skeleton Plotting by Computer
, 1979 Skeleton plotting is an established manual technique for representing the relative narrowness of tree rings in a single radius. These plots can be used as a visual aid to crossdating.
Cropper, John Philip
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Zero-divisor graphs of reduced Rickart *-rings
Discussiones Mathematicae - General Algebra and Applications, 2017 For a ring A with an involution *, the zero-divisor graph of A, Γ*(A), is the graph whose vertices are the nonzero left zero-divisors in A such that distinct vertices x and y are adjacent if and only if xy* = 0.
Patil A.A., Waphare B.N.
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Ring-Over-Ring Deslipping From Imine-Bridged Heterorotaxanes
Frontiers in Chemistry, 2022 Ring-over-ring slippage and ring-through-ring penetration are important processes in the construction of ring-in-ring multiple interlocked architectures.
Sayaka Hoshino +2 more
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