Induction motors are being used more than ever before in industry and individual machines of up to 10 MW in size are no longer a rarity. During start-up and other severe motor operations the induction motor draws large currents, produces voltage dips, oscillatory torque and can even generate harmonics in the power system [1 4]. It is therefore important to be able to model the induction motor i...

Derivation of PCA I: For a set of d-dimensional data vectors {x}i=1, the principal axes {e}qj=1 are those orthonormal axes onto which the retained variance under projection is maximal. It can be shown that the vectors ej are given by the q dominant eigenvectors of the sample covariance matrix S, such that Sej = λjej . The q principal components of the observed vector xi are given by the vector ...

AbstructWe consider a multidimensional parameter space formed by inner products of a parameterizable family of chirp functions with a signal under analysis. We propose the use of quadratic chirp functions (which we will call q-chirps for short), giving irise to a parameter space that includes both the time-frequency plane and the time-scale plane as 2-D subspaces. The parameter space contains a...

We present an efficient algorithm for evaluating an XPath query Q (involving only child and descendant axes) on a streaming XML document D. Previously known in-memory algorithms for XPath evaluation use O(|D|) space and O(|Q||D|) time. Several previous algorithms for the streaming version use Θ(d +c) space and Θ(d|D|) time in the worst case; d is the depth of D, n is the number of location step...

We consider the XPath evaluation problem: Evaluate an XPath query Q on a streaming XML document D. We consider two versions of the problem: 1). Filtering Problem: Determine if there is a match for Q in D. 2). Node Selection Problem: Determine the set Q(D) of document nodes selected by Q. We consider Conjunctive XPath (CXPath) queries that involve only the child and descendant axes. Let d denote...

In the present study, 2, 4-dichlorophenoxyacetic acid (2, 4-D) was assessed individually for its effectiveness to induce somatic embryogenesis in tea (Camellia sinenesis L.). Embryonic axes and cotyledons explants were dissected from the seeds. Explants were cultured on Murashige and Skoog (MS) medium containing 0, 1 and 5 mM 2, 4-D alone for embryonic axes and 0, 1 and 5 mM 2, 4-D along with 0...

Let μ be a Borel measure on Rd which may be nondoubling. The only condition that μ must satisfy is μ(Q) ≤ c0l(Q) for any cube Q ⊂ Rd with sides parallel to the coordinate axes and for some fixed n with 0 < n ≤ d. This paper is to establish the weighted norm inequality for commutators of Calderón-Zygmund operators with RBMO(μ) functions by an estimate for a variant of the sharp maximal function ...

We study the Partial Nearest Neighbor Problem that consists in preprocessing n points D from d-dimensional metric space such that the following query can be answered efficiently: Given a query vector Q ∈ R and an axes-aligned query subspace represented by S ∈ {0, 1}, report a point P ∈ D with dS(Q,P ) ≤ dS(Q,P ′) for all P ′ ∈ D, where dS(Q,P ) is the distance between Q and P in the subspace S....

in the present study, 2, 4-dichlorophenoxyacetic acid (2, 4-d) was assessed individually for its effectiveness to induce somatic embryogenesis in tea (camellia sinenesis l.). embryonic axes and cotyledons explants were dissected from the seeds. explants were cultured on murashige and skoog (ms) medium containing 0, 1 and 5 mm 2, 4-d alone for embryonic axes and 0, 1 and 5 mm 2, 4-d along with 0...

This paper presents a predictive torque and flux control algorithm for the synchronous reluctance machine. The algorithm performs a voltage space phasor pre-selection, followed by the computation of the switching instants for the optimum switching space phasors, with the advantages of inherently constant switching frequency and time equidistant implementation on a DSP based system. The criteria...