Qliktech International Ab

Dialog Semiconductor Gmbh

Other

Pharmacia Biotech Ab

Johan Nilsson

Khoa Tan Nguyen

José Díaz López

Horst Knoedgen

José Diaz López

Johan Drott

Thomas Laurell

Lars Wallman

Lars Lennartsson

Pawel Rafal Krupinski

José Dìaz López

Staffan Nilsson

Lars Lennartson

Yolanda Perdomo Gallipoli

Quan Sun

José Francisco Diaz López

José Francisco Diaz LÓPEZ

Systems and methods for processing queries are described herein. As an example, a query may comprise an expression. Based on the expression, one or more indexlets may be determined. Using the one or more indexlets, a result of the expression may be determined.

Chart engine

Provided are methods and systems for traversing a data model with a plurality of workers to generate a plurality of virtual records for use in evaluating an expression by a plurality of aggregators. Each aggregator may receive a respective virtual record and evaluate a hypercube function and determine a respective hash based on the respective virtual record. The virtual records based on the respective hash values of the respective virtual records may be stored by the plurality of aggregators.

Methods and systems for indexlet based aggregation

In an aspect, provided is a method comprising receiving a data model, partitioning a first table in the data model into a first plurality of blocks of rows, generating a first plurality of indexlets, the first plurality of indexlets comprising a first plurality bidirectional indexes, each of the first plurality of bidirectional indexes being generated based on a corresponding one of the first plurality of blocks of rows.

Methods and systems for bidirectional indexing using indexlets

In an aspect, provided is a method comprising receiving an expression involving one or more dimensions, determining one or more indexlets associated with the one or more dimensions, querying each of the one or more indexlets with the expression, receiving a result from each of the one or more indexlets, and aggregating the results.

In an aspect, provided is a method for targeted extraction of data satisfying a query. The method can rely upon one or more data structures indicative of data values satisfying or not satisfying one or more filters. Only the data indicated as satisfying (or as not satisfying) the data in a data structure related to the query are extracted. The extracted data may then be sorted.

Methods and systems for improved data retrieval and sorting

In an aspect, provided is a method comprising receiving a data model, generating a bidirectional table index (BTI) based on the data model, generating a bidirectional association index (BAI) based on the data model and the bidirectional table index, and loading a portion of the data model, the BAI, and the BTI in-memory.

Methods and systems for bidirectional indexing

In a Class-D Amplifier with PCM (Pulse Code Modulated) input signal, the output pulse width may be adjusted to provide a constant time-voltage-area or the output pulse width may have one of several discrete values to provide a multi-level output system. A fundamental idea of this disclosure is to assure the center of each output pulse is always positioned at the nominal clock or with a fixed delay relative to the nominal clock. Said Class-D Amplifier typically converts the input signal into PDM (Pulse Density Modulated) pulses with a Sigma Delta Modulator and typically drives the output load with an H-Bridge.

Center of gravity compensation of Class-D amplifier

Introduce a pulse length control mechanism to generate virtual multi-level output pulses for a Class-D Amplifier, which has only 2 physical output levels. Typically a Sigma-Delta-Modulator converts the input signal into high frequency low bit rate. The disclosed invention adds functions to transform the SDM signal into pulses with equivalent multi-level time-voltage areas and adds a pulse-length-control mechanism to produce various output pulse patterns, where the summations of the positive and negative pulses, within one sampling period, result in time-voltage area values, corresponding to 3 or more digital levels. Thus the invention produces higher signal quality at lower sampling rates.

Multi-level Class-D amplifier by means of 2 physical layers

A method to linearize the characteristic of a Class-D amplifier is achieved, by compensating for the pulse-area-error, caused by a non-constant power-supply and similar circuit inconsistencies. A Class-D Amplifier typically converts the PDM (Pulse Density Modulated) input signal with a Sigma Delta Modulator and typically uses an H-Bridge as the Class-D power output stage. A fundamental idea is to keep the time-voltage area of every pulse constant. To achieve this, the circuit integrates the power supply voltage, starting with the PDM input pulse and stopping, when the defined time-voltage reference is reached. To compensate not only for power supply variations, but also for e.g. the voltage drop across the output devices, the integrator's input would be more directly reference to the actual voltage across the output load.

Linearization of a PDM Class-D amplifier

A method for compensating for the pulse area error of a Class-D power amplifier is achieved; especially it compensates the variations in the supply voltage and similar dependencies. A Class-D Amplifier typically gets pulse coded digital input (PCM) and may comprise a Sigma Delta Modulator to generate the signals driving the power output stage, typically an H-Bridge. A fundamental idea of this invention is to measure the real area of the output pulses, where the area is defined as the pulse duration multiplied by the pulse voltage amplitude, and to compare it with the ideal nominal pulse area. The pulse area error is calculated and then subtracted from said amplifier's input data. Key element of this invention is the &ldquo;Pulse Area Compensation Function&rdquo;, which calculates said real pulse area (voltage amplitude multiplied by time), compares said real pulse area with said ideal pulse area and feeds the difference into the input of said Sigma Delta Modulator.

Class-D amplifier with digital feedback

A method to generate virtual multi-level output pulses for a Class-D Amplifier, where the time-voltage-area corresponds to a multiple of digital levels is achieved. A class-D Amplifier using PDM (Pulse Density Modulation) normally converts the input signal with a Sigma Delta Modulator into high-frequency pulses of equal width and typically drives an H-Bridge, with its 3 physical output levels. The disclosed invention however adds the methods to produce pulses with a multiple of discrete values of width and provides the method to generate a pulse length select control signal for these variable-width-pulses. Using multi-level pulse widths, in contrast to just a single pulse width, allows the reduction of the pulse-sampling rate by the same factor. Or Multi-level pulse widths allow a better quality output signal. In addition, better power efficiency is achievable.

Multi-level class-D amplifier by means of 3 physical levels

The invention relates to a method for etching an opening, and more precisely, to etching in a silicon plate for creating a nozzle opening. According to the invention, one side of the silicon plate ( ) is protected by a protective layer ( ), and a recess ( ) is made in the protective layer. Etching is made anisotropically through the recess so as to create a cavity ( ) in the shape of a truncated pyramid of a predetermined depth in the silicon plate. The cavity is doped so as to create a doped layer ( ) at the predetermined depth. The etching is then continued until the bottom surface of the cavity has passed the doped layer. Subsequently, etching is performed from the other side, while a voltage is applied to the doped layer, so as to free the nozzle opening at the other side. The invention enables an accurate control of the surface area of the nozzle opening. Through this, the amount of discharged fluid and the directional precision can be controlled very accurately.

Method of etching an opening

A sampling cell of flow-through type and use of such a sampling cell. The sampling cell is preferably manufactured by etching of silicon wafers. It is especially useful for continuous picovolume sampling in an analytical flow. The pressure pulse generator (,) generates pulses directly into a flow channel (,). The flow channel (,) is preferably formed by a first basin (,) in a first structure (,) and a second basin (,) in a second structure (,). In a first embodiment the pressure pulse generator (,) comprises at least one piezo-ceramic disc and/or devices acting by way of magnetostrictive, electrostatical or electromechanical forces and/or devices acting by way of thermal expansion. Method of directing samples from a flow-through sampling cell by establishing a difference in electrical potential between the liquid in the flow-through sampling cell and the object to which the samples are to be directed. Use of a flow-through sampling cell for coating of surfaces, especially for achieving biospecific surfaces, for extracting samples from a continuous liquid flow, for extracting a precise sample amount by collecting a defined number of samples or for injecting samples for electrophoresis, especially capillary electrophoresis, and for electrochromatography.

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Lund, Sweden

Johan Nilsson