We have studied the phase diagram of the one dimensional XXZ model with Dzyaloshinskii-Moriya (DM) interaction. We have applied the quantum renormalization group (QRG) approach to get the stable fixed points, critical point and the scaling of coupling constants. This model has three phases, ferromagnetic, spin-fluid and Néel phases which are separated by a critical line which depends on the DM ...

State estimation and power flow analysis are important tools for analysis, operation and planning of a power system. In this paper, a new state estimation method based on the extended weighted least squares (WLS) method for considering both measurement errors and model inaccuracy is presented. Two bus, three bus, and IEEE 14 bus test cases are employed to evaluate the accuracy of the method. Th...

We formulate the spin foam perturbation theory for three-dimensional Euclidean Quantum Gravity with a cosmological constant. We analyse the perturbative expansion of the partition function in the dilute-gas limit and we argue that the Baez conjecture stating that the number of possible distinct topological classes of perturbative configurations is finite for the set of all triangulations of a m...

This article presents a novel Sparse Constant Propagation technique which provides a heretofore unknown level of practicality. Unlike other techniques which are based on data ow, it is based on the execution-order summarization sweep employed in Memory Classiication Analysis (MCA), a technique originally developed for array dependence analysis. This methodology achieves a precise description of...

This paper concerns inter-procedural dataflow-analysis problems in which the dataflow information at a program point is represented by an environment (i.e., a mapping from symbols to values), and the effect of a program operation is represented by a distributive environment transformer. We present two efficient algorithms that produce precise solutions: an exhaustive algorithm that finds values...

2014 It is shown that the application of an external temperature gradient across the materials with strain dependent dielectric constant can lead to amplify an acoustic wave even when the drift velocity of the electrons is less than the velocity of sound. REVUE DE PHYSIQUE APPLIQUÉE TOME 12, OCTOBRE 1977, PAGE Classification Physics Abstracts 62.20

The nonlinear progressive wave equation (NPE) is a time-domain model used to calculate long-range shock propagation using a wave-following computational domain. Current models are capable of treating smoothly spatially varying medium properties, and fluid-fluid interfaces that align horizontally with a computational grid that can be handled by enforcing appropriate interface conditions. However...

Multiple constant multiplication (MCM) is the problem of realizing several constant multiplications with one data using as few additions/subtractions as possible. Almost all previously proposed MCM algorithms have been using carry-propagation adders. However, for high-speed applications carry-save adders are a better choice. Although it is possible to map carry-save adders to carry-propagation ...

We demonstrate effectively two-dimensional (2D) terahertz (THz) photonic bandgap (PBG) structures for transverse electromagnetic (TEM) mode propagation within metal parallel plate waveguides (PPWG). The 2D-PBG structures consisting of square arrays of dielectric cylinders were characterized by THz time-domain spectroscopy (THz-TDS). THz photonic bandgaps were observed, as determined by the 160 ...

An approach of Green’s function is adopted to solve the inhomogeneous linear differential equations representing wave equations in piezo-composite materials. In particular, transference of horizontally polarised shear (SH) waves is considered in bedded structure comprising of porous-piezo electric layer lying over a heterogeneous half-space. Propagation of SH-waves is considered to be influence...