This paper proposes a Principal Component Analysis (PCA)-based method to construct composite indices rapidly assess power system transient stability. By assigning appropriate weights few selected sub-indicators, index can be constructed guarantee better coverage of worst-case stability scenarios the system. provides an automatic with four sub-indicators calculated by integral acceleration, spee...

the aim of this research was to evaluate some soil physical quality indicators using remotely sensed date, gis and geostatistical methods in baft area that is one of the most important centers of agricultural production in kerman province. therefore, soil samples were collected from 0 to 20cm depth of 183 points based on regular sampling pattern (every 250 meters) and soil physical indicators i...

We introduce a new notion of stability for nonlinear systems called Rational Stability (RS). Rational Stability is defined for autonomous systems that are globally asymptotically stable as a property of the induced norm of a scaling operator that maps one solution of the system to another. We give an Index called Rational Stability Index (RSI) which is a positive number that quantifies the amou...

We investigate the problem of the stability of the number of conjugate or focal points (counted with multiplicity) along a semi-Riemannian geodesic γ. For a Riemannian or a nonspacelike Lorentzian geodesic, such number is equal to the intersection number (Maslov index) of a continuous curve with a subvariety of codimension one of the Lagrangian Grassmannian of a symplectic space. In the general...

in order to determinate appropriate stability parameters, six statistics were studied for flower yield stability of 35 rosa damascena landraces in 8 locations over two years (2007-8) in iran, using a randomized complete blocks design with 3 replications. a positive correlation between environmental variance (s2) and flower yield suggested that only low yield landraces develop a similar phenotyp...