5,137,821 research outputs found
An Example of Utilizing Stochastic Approach for Investigating Network Constraints (Congestions) on Horizontally Operated Power Systems with Distributed Generation
This paper shows an example of a stochastic approach to study the impact of distributed generation (DG) on the network constraints (congestions) in power systems. We assume the DG units to be customer-owned, so that they can be connected to or disconnected from the power system by their owners at random. Therefore, the DG units generate power in a stochastic way. The load in the system shows a random behavior too, and the probability distribution of the aggregated generated power and load demand of the distribution system are calculated using Monte Carlo Simulation (MCS).The network constraints (congestions) are evaluated based on the probability distributions of the power flows that result from the simulations. The method that is applied in this paper, shows that looking at the network constraints with a stochastic approach gives a more complete picture of the network than applying a deterministic method, especially when non-dispatchable DG units play a dominant role
Twisted Quantum Affine Superalgebra , Invariant R-matrices and a New Integrable Electronic Model
We describe the twisted affine superalgebra and its quantized
version . We investigate the tensor product representation
of the 4-dimensional grade star representation for the fixed point
subsuperalgebra . We work out the tensor product decomposition
explicitly and find the decomposition is not completely reducible. Associated
with this 4-dimensional grade star representation we derive two
invariant R-matrices: one of them corresponds to and the
other to . Using the R-matrix for , we
construct a new invariant strongly correlated electronic model,
which is integrable in one dimension. Interestingly, this model reduces, in the
limit, to the one proposed by Essler et al which has a larger, ,
symmetry.Comment: 17 pages, LaTex fil
Quadratic automaton algebras and intermediate growth
We present an example of a quadratic algebra given by three generators and
three relations, which is automaton (the set of normal words forms a regular
language) and such that its ideal of relations does not possess a finite
Gr\"obner basis with respect to any choice of generators and any choice of a
well-ordering of monomials compatible with multiplication. This answers a
question of Ufnarovski.
Another result is a simple example (4 generators and 7 relations) of a
quadratic algebra of intermediate growth.Comment: To appear in Journal of Cobinatorial Algebr
On the algebra A_{\hbar,\eta}(osp(2|2)^{(2)}) and free boson representations
A two-parameter quantum deformation of the affine Lie super algebra
is introduced and studied in some detail. This algebra is the
first example associated with nonsimply-laced and twisted root systems of a
quantum current algebra with the structure of a so-called infinite Hopf family
of (super)algebras. A representation of this algebra at is realized in
the product Fock space of two commuting sets of Heisenberg algebras.Comment: 14 pages, LaTe
On some metabelian 2-group whose abelianization is of type (2, 2, 2) and applications
Let be some metabelian -group satisfying the condition .
In this paper, we construct all the subgroups of of index or , we
give the abelianization types of these subgroups and we compute the kernel of
the transfer map. Then we apply these results to study the capitulation problem
of the -ideal classes of some fields satisfying the condition
, where
is the second Hilbert -class field of .Comment: in Journal of Taibah University for Science (2015
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