Abstract:
A method and system for estimating an angular position and an angular velocity of a rotor in a dynamoelectric machine measures an AC current and a potential for each of a plurality of windings coupled to a stator of the dynamoelectric machine, transforms the measured currents and potentials to a stationary frame to produce transformed currents and transformed potentials, and processes the transformed currents and transformed potentials to produce a first intermediate signal and a second intermediate signal. The first intermediate signal and the second intermediate signal are cross-coupled to produce a third intermediate signal and a fourth intermediate signal. The third intermediate signal and the fourth intermediate signal are processed to obtain a first extended rotor flux value and a second extended rotor flux value. The first extended rotor flux value and the second extended rotor flux value are applied to a phase lock loop to derive an estimated rotor angular position and an estimated rotor angular velocity for the dynamoelectric machine.
Abstract:
The present invention provides a method of source number estimation based on eigenspace in DOA estimation, including: (1) obtaining signals received by uniform linear array; (2) calculating a covariance matrix according to the received signals; (3) calculating a complex-valued covariance matrix or a covariance matrix after real-valued computations; (4) conducting eigendecomposition to the covariance matrix to obtain its eigenvector matrix; (5) calculating a source number decision based on the eigenvector; (6) calculating a ratio; and (7) source number estimation. The present invention can accurately estimate source number and save huge amounts of computation during signal processing in DOA estimation, and lower the cost of hardware.
Abstract:
A method for controlling communications traffic on an inter-access-network link includes receiving a request for transmission of a traffic flow and determining a priority queue associated with the traffic flow. If the priority queue corresponds to the one of a first plurality of priority levels, the method further includes determining whether one or more predetermined criteria for the traffic flow are satisfied. If yes, the method additionally admitting the traffic flow, storing information associated with the traffic flow in the queue, and transmitting information associated with the traffic flow from the queue based on at least a strict priority process. If the queue corresponds to the one of a second plurality of priority levels, the method further admitting the traffic flow, storing information associated with the traffic flow in the queue, and transmitting information associated with the traffic flow from the queue based on at least an arbitrated priority process.
Abstract:
The present invention discloses a method for optimizing PCR amplification by adding elementary substance material into PCR system, wherein the elementary substance material is selected from a group consisting of element titanium, element nickel, element bismuth, element stibium, element selenium, element chromium, and a mixture of the group. This new method is more effective than conventional amplifying method and could be widely employed in many fronts, especially in multiplex PCR, two-round PCR, low-copy PCR, long-term PCR and rapid PCR.
Abstract:
A shaft sensorless rotor angular position and velocity sensing system for a dynamoelectric machine that is based on dynamoelectric machine extended flux estimation.
Abstract:
An improved line replaceable unit (LRU) of modular design for aerospace applications that has a plurality of removable LRU modules to enhance manufacturability, serviceability, interchangeability and upgradeability of the LRU.
Abstract:
An integrated processing technique for preparing moisture management textiles or fabrics wherein a treatment of fibers with imparts a hydrophobic or hydrophilic property such that when incorporated into the fabrication of composite structured textiles or fabrics a hydrophobic inner surface and the hydrophilic outer surface is formed. The integrated processing technique for preparing moisture management textiles also includes finishing the textiles or fabrics with to enhance the fabric's liquid water one way transfer properties. The advantage of this invention is the possibility to manufacture the pure cotton woven/knitting fabrics with the good moisture management properties.
Abstract:
The invention images dielectric polarization forces on surfaces induced by a charged scanning force microscope (SFM) probe tip. On insulators, the major contribution to the surface polarizability at low frequencies is from surface ions. The mobility of these ions depends strongly on the humidity. Using the inventive SFM, liquid films, droplets, and other weakly adsorbed materials have been imaged.
Abstract:
The present disclosure generally discloses an addressing mechanism adapted for extending a customer local area network of a customer premises of a customer outside of the customer premises and into a private data network with improved scalability and performance. The extension of a local area network of a customer premises of a customer outside of the customer premises and into a private data network may be provided using a customer bridge associated with the customer local area network of the customer, a customer bridging domain hosted on a network gateway device for the customer, and a switching element hosted in the private data network for the customer for one or more customer components hosted within the private data network for the customer. The addressing mechanism may include one or more of address announcement functions, address resolution functions, address translation functions, or the like, as well as various combinations thereof.
Abstract:
This invention discloses a semiconductor power device formed on an upper epitaxial layer of a first conductivity type supported on a semiconductor substrate. The semiconductor power device having a super junction structure with the epitaxial layer formed with a plurality of vertically extended doped columns of a second conductivity type. The semiconductor power device further comprises a plurality of transistor cells each of the transistor cells comprises a planar gate extending over a top surface and each of the planar gates further includes a middle trench gate extending vertically into the epitaxial layer from a middle portion of the planar gates. Each of the middle trench gates is surrounded by a source region of the first conductivity type encompassed in a body region of the second conductivity type extending substantially between two adjacent doped columns of the second conductivity type.