2,937 research outputs found
Separation of variables in the generalized 4th Appelrot class
We consider the analogue of the 4th Appelrot class of motions of the
Kowalevski top for the case of two constant force fields. The trajectories of
this family fill the four-dimensional surface O^4 in the six-dimensional phase
space. The constants of three first integrals in involution restricted to this
surface fill one of the sheets of the bifurcation diagram in R^3. We point out
the pair of partial integrals to obtain the explicit parametric equations of
this sheet. The induced system on O^4 is shown to be Hamiltonian with two
degrees of freedom having the thin set of points where the induced symplectic
structure degenerates. The region of existence of motions in terms of the
integral constants is found. We provide the separation of variables on O^4 and
the algebraic formulae for the initial phase variables.Comment: LaTex, 16 pages, 1 figur
Specificity of modern corporate culture
В статье рассматриваются некоторые проблемы корпоративной культуры современного общества. Характеризуются факторы развития современной концепции корпоративной культуры. Анализируется сущность корпоративной культуры, которая проявляется в виде ряда аспектов, формирующих содержательные характеристики культуры общения и взаимодействия в определенных коллективах.The article discusses some problems of corporate culture of modern society. Characterized by the factors of the development of the concept of corporate culture. Analyzes the nature of corporate culture which is manifested in the form of a number of aspects, forming the characteristics of the culture of communication and interaction in certain groups
Algorithm for Adapting Cases Represented in a Tractable Description Logic
Case-based reasoning (CBR) based on description logics (DLs) has gained a lot
of attention lately. Adaptation is a basic task in the CBR inference that can
be modeled as the knowledge base revision problem and solved in propositional
logic. However, in DLs, it is still a challenge problem since existing revision
operators only work well for strictly restricted DLs of the \emph{DL-Lite}
family, and it is difficult to design a revision algorithm which is
syntax-independent and fine-grained. In this paper, we present a new method for
adaptation based on the DL . Following the idea of
adaptation as revision, we firstly extend the logical basis for describing
cases from propositional logic to the DL , and present a
formalism for adaptation based on . Then we present an
adaptation algorithm for this formalism and demonstrate that our algorithm is
syntax-independent and fine-grained. Our work provides a logical basis for
adaptation in CBR systems where cases and domain knowledge are described by the
tractable DL .Comment: 21 pages. ICCBR 201
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