Results 251 to 260 of about 663,196 (288)

Covariant Evolution Operator and Green’s Operator

2011
The third method we shall consider for numerical QED calculation on bound states is the covariant-evolution-operator (CEO) method, developed during the last decade by the Gothenburg group [9]. This procedure is based upon the nonrelativistic time-evolution operator, discussed in Chap.
openaire   +1 more source

Time-evolution operator and Lie algebras

Physical Review A, 1989
We discuss the Schr\"odinger equation with a time-dependent Hamiltonian that can be written as a linear combination of operators which span a finite-dimensional Lie algebra. The equations of motion for the operators in the Heisenberg representation are shown to be useful in calculating matrix elements and transition probabilities, as well as in ...
openaire   +2 more sources

The Evolution of an Operant Ecologist

Appetite, 2002
George Collier has maintained a research program concerned with the controls of eating for forty-three years. In the first ten years, Collier approached the problem within the operant conditioning framework proposed by Skinner. This consisted of the intrameal analysis of the reflex strength of a food-rewarded operant in short sessions in food-deprived ...
openaire   +2 more sources

Evolution of Operative Technique for Mastectomy

Surgical Clinics of North America, 2018
The radical mastectomy was the mainstay of breast cancer treatment through the majority of the twentieth century. However, as the understanding of breast cancer increased, the indications for more extensive surgical intervention decreased. The mastectomy has evolved so that skin-sparing or nipple-sparing mastectomy can be performed in the majority of ...
Caroline, Jones, Rachael, Lancaster
openaire   +2 more sources

EVOLUTION PARABOLIC INEQUALITIES WITH MULTIVALUED OPERATORS

Russian Academy of Sciences. Sbornik Mathematics, 1994
Summary: Conditions are found under which the set of solutions of an evolution parabolic inequality is nonempty, compact, and connected. Included in the study is the Cauchy problem \(f\in y'+ Ay\), \(y(\alpha)= h\) with a multivalued and monotone operator \(A: Z^*\to Z\), where \(Z\) is a nonreflexive \(B\)-space.
openaire   +1 more source

Evolution of an operation.

The Journal of cardiovascular surgery, 1981
The story of the origin of Matas' endoaneurysmorrhaphy with suggestions for maintaining or restoring arterial continuity and their gradual evolution into the technique of intrasaccular interpolation of grafts in managing aneurysms provides another example of the increased utility of an operative procedure by its modification and expansion.
openaire   +1 more source

On evolution operators of genetic coalgebras

Journal of Mathematical Biology, 2016
We characterize evolutionary operators acting on coalgebras with genetic realization modeling the backwards genetic inheritance in Mendelian genetic systems. This characterization is made in terms of the different slices of the cubic stochastic matrix of type (1,2) given by the transition probabilities defining the genetic coalgebra comultiplication ...
openaire   +3 more sources

The Operations System Evolution Laboratory

AT&T Technical Journal, 1994
The operations system evolution laboratory was established as a showcase for Operations Systems Business Unit (OSBU) new products, ideas, and technology. The lab contributes to the evolution of operations systems products by providing a forum for direct customer feedback and by supporting the dissemination of new product ideas across the business unit.
openaire   +1 more source

Current development on the Operator 4.0 and transition towards the Operator 5.0: A systematic literature review in light of Industry 5.0

Journal of Manufacturing Systems, 2023
Bartlomiej Gladysz, David Romero, Tim van Erp   +2 more
exaly  

Koopman operator dynamical models: Learning, analysis and control

Annual Reviews in Control, 2021
Stefan Sosnowski
exaly