Abstract: Disclosed are a method for operating a piezoelectric drive system (10) used for adjusting movable parts (12, 14), especially in a motor vehicle (13), as well as a piezoelectric drive unit (10) comprising at least one piezo motor (12) that is fitted with at least one piezo actuator (18). At least one frictional element (30) of the piezo motor (12) makes it possible to generate a relative movement in relation to a frictional surface (14) located across from the frictional element (30). The at least one piezo actuator (18) is triggered with an excitation signal (93) by means of an electronic unit (42). A response signal (130) of the drive system (10) is detected using the at least one piezo actuator (18), a change in the load of the drive system (10) being recognized as a result of a change in the response signal (130).

Abstract: Disclosed are a piezoelectric drive unit (10) and a method for operating such a drive unit in order to adjust movable parts (11), especially in a motor vehicle. Said piezoelectric drive unit (10) comprises at least one piezo motor (12) that is fitted with at least one piezo actuator (18). At least one frictional element (30) of the piezo motor (12) makes it possible to generate a relative movement in relation to a frictional surface (14) located across from the frictional element (30). Said at least one frictional element (30) is disposed on a bridging web (28) of the motor (12). The bridging web (28) places the frictional element (30) at a distance (2) from the central axis (89) of the at least one piezo actuator (18), said central axis (89) extending in a longitudinal direction (19).

Abstract: A method, system, and computer readable medium for adjusting prices is provided and includes receiving at least one itinerary having an associated price, and modifying the availability of at least one component of the itinerary across a plurality of distribution channels. The method, system, and computer readable medium may also include modifying the availability to generate a more competitive or profitable price for the itinerary and outputting the competitive price and the itinerary. In addition, the method, system, and computer readable medium may include determining the availability of a roundtrip itinerary in a single transaction with a computerized reservation system and modifying the availability of the roundtrip itinerary.

Abstract: The present invention generates a grid of low-priced fare combinations for either a selected departure and return date or a range of departure and return dates. The present invention uses various techniques to reduce processing and delay in generating the grids. The present invention first converts flight itineraries for the selected departure and return dates or the range of dates into the fare domain. The invention discards fare combinations that are not valid for the given travel request. The valid fare combinations are processed to determine which has the lowest fare price. The fare combinations are processed one at a time starting with the cheapest fare combination to determine which of the possible flight itineraries may be covered by the fare combination. The invention may use additional prunning steps to validate the fare combinations prior to application to individual flight itineraries. As each fare combination is matched to a flight itinerary, the grid is populated with this fare combination.