The product quality in a machining process can be affected by datum surface imperfections, fixture locator errors, and machine tool errors. It has been previously observed that these effects can cancel out one another for certain features. The mathematical modeling and analysis of this phenomenon is currently an open issue. We use the concept of an Equivalent Fixture Error (EFE) embedded into a...

ÐA heterogeneous distributed database environment integrates a set of autonomous database systems to provide global database functions. A flexible transaction approach has been proposed for the heterogeneous distributed database environments. In such an environment, flexible transactions can increase the failure resilience of global transactions by allowing alternate (but in some sense equivale...

Many organisms face a dilemma rooted in the unequal numbers of X chromosomes carried by the two sexes and the need to maintain equivalent expression of X-linked genes. Several strategies have arisen to cope with this problem. All rely on accurately targeting epigenetic modifications to entire chromosomes. Targeting results from the action of recognition elements that attract modification and ma...

The gene encoding INI1, a component of the mammalian SWI/SNF ATP-dependent chromatin remodeling enzymes, has been classified as a tumor suppressor in humans. Gene-targeting experiments confirmed that Ini1 also functions as a tumor suppressor in mice. Although Ini1-null mice are embryonic lethal, 15-30% of mice heterozygous for Ini1 presented with poorly differentiated tumors with variable rhabd...

ÐA heterogeneous distributed database environment integrates a set of autonomous database systems to provide global database functions. A flexible transaction approach has been proposed for the heterogeneous distributed database environments. In such an environment, flexible transactions can increase the failure resilience of global transactions by allowing alternate (but in some sense equivale...

This paper presents a real-time method to compensate for the variable cyclic error in a homodyne laser interferometer. The parameters describing the quadrature signals of the interferometer are estimated using simple peak value detectors. The cyclic error in the homodyne laser interferometer was then corrected through simple arithmetic calculations of the quadrature signals. A field programmabl...

in this paper, a novel control method for photovoltaic converter connection to the national gridis presented, so in addition to the injection control by solar arrays to the grid, this method cancompensate reactive power and harmonics in the load current. the system will be connected inparallel between the grid and load. the proposed system supplies all load power consumption(including active po...

This study proposes a generic mathematical modelling and decoupling fault-tolerant vector control for dual three-phase permanent magnet synchronous machine (PMSM) with one phase open based on the conventional voltage source inverters, accounting mutual coupling between two sets of windings second harmonic inductance. When PMSM has open, flux-linkages are asymmetric there components in reference...

We consider baseband equivalent representation of transmission circuits, in the form of a nonlinear dynamical system S in discrete time (DT) defined by a series interconnection of a phase-amplitude modulator, a nonlinear dynamical system F in continuous time (CT), and an ideal demodulator. We show that when F is a CT Volterra series model, the resulting S is a series interconnection of a DT Vol...