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1409results about How to "Avoid poor results" patented technology

Arrangement and method for the intra-operative determination of the position of a joint replacement implant

Arrangement for the intra-operative determination of the spatial position and angular position of a joint replacement implant, especially a hip socket or shoulder socket or an associated stem implant, or a vertebral replacement implant, especially a lumbar or cervical vertebral implant, using a computer tomography method, having: a computer tomography modeling device for generating and storing a three-dimensional image of a joint region or vertebral region to be provided with the joint replacement implant, an optical coordinate-measuring arrangement for providing real position coordinates of defined real or virtual points of the joint region or vertebral region and/or position reference vectors between such points within the joint region or vertebral region or from those points to joint-function-relevant points on an extremity outside the joint region or vertebral region, the coordinate-measuring arrangement comprising a stereocamera or stereocamera arrangement for the spatial recording of transducer signals, at least one multipoint transducer, which comprises a group of measurement points rigidly connected to one another, and an evaluation unit for evaluating sets of measurement point coordinates supplied by the multipoint transducer(s) and recorded by the stereocamera, and a matching-processing unit for real position matching of the image to the actual current spatial position of the joint region or vertebral region with reference to the real position coordinates of the defined points, the matching-processing unit being configured for calculating transformation parameters with minimalization of the normal spacings.
Owner:SMITH & NEPHEW ORTHOPAEDICS

Statistical model-based metrology

ActiveUS20140297211A1Predictive result be improvedReduction in computation and user timeSemiconductor/solid-state device testing/measurementSolid-state devicesStatistical modelMultiple target
Methods and systems for creating a measurement model based on measured training data are presented. The trained measurement model is used to calculate process parameter values, structure parameter values, or both, directly from measured data collected from other wafers. The measurement models receive measurement data directly as input and provide process parameter values, structure parameter values, or both, as output. The measurement model enables the direct measurement of process parameters. Measurement data from multiple targets is collected for model building, training, and measurement. In some examples, the use of measurement data associated with multiple targets eliminates, or significantly reduces, the effect of under layers in the measurement result, and enables more accurate measurements. Measurement data collected for model building, training, and measurement, may be derived from measurements performed by a combination of multiple, different measurement techniques.
Owner:KLA TENCOR CORP

Pilot signals for synchronization and/or channel estimation

InactiveUS6987746B1Optimal autocorrelation resultEliminate and prevent sidelobesSynchronisation arrangementTime-division multiplexCode division multiple accessCorrelation function
The frame words of the preferred embodiment are especially suitable for frame synchronization and/or channel estimation. By adding the autocorrelation and cross-correlation functions of frame words, double maximum values equal in magnitude and opposite polarity at zero and middle shifts are obtained. This property can be used to slot-by-slot, double-check frame synchronization timing, single frame synchronization and/or channel estimation and allows reduction of the synchronization search time. Further, the present invention allows a simpler construction of a correlator circuit for a receiver. A frame synchronization apparatus and method using an optimal pilot pattern is used in a wide band code division multiple Access (W-CDMA) next generation mobile communication system. This method includes the steps of storing column sequences demodulated and inputted by slots, in a frame unit, in detecting frame synchronization for upward and downward link channels; converting the stored column sequences according to a pattern characteristic related to each sequence by using the pattern characteristic obtained from the relation between the column sequences; adding the converted column sequences by slots; and performing a correlation process of the added result to a previously designated code column.
Owner:LG ELECTRONICS INC

Method of positioning electrodes for central nervous system monitoring

InactiveUS6950698B2Simple and practicalKeep low levelElectroencephalographyElectrocardiographyElectrode arrayCentral nervous system
Method of positioning electrodes in an electrode array, comprising at least five or at least seven electrodes for central nervous system (CNS) monitoring from the forehead of a patient's head. The electrodes of the array are optimally located for discriminating EEG, FEMG and EM components from the recorded biopotential signals.
Owner:INSTRUMENTARIUM CORP
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