Abstract: An autonomic system for updating a fuzzy neural network includes a process of calculating an estimated value based on fuzzy inference by using a neural network structure, wherein a parameter to be adjusted or identified by fuzzy inference and outputted from the neural network is made to correspond to coupling loads which are updated by learning, i.e., fuzzy rules and membership functions are adjusted by learning. This system is characterized in that the addition and deletion of fuzzy rules are conducted based on changes in output errors in an autonomic manner, thereby effectively obtaining appropriate numbers of fuzzy rules optimal for an object such as a vehicle engine having strong non-linearity. Fuzzy rules are formed by a combination of membership functions representing variables such as an engine speed and a throttle angle.

Abstract: A micro computer, constituting a signature recognition apparatus, comprises an automatic signature creating section, a data extracting section, a recognition network section, a retrieval section, and a memory section. The data extracting section creates personal data representing a plurality of personal characteristics or features based on an input signature. The recognition network section selects the data to be used for evaluation from the personal data representing personal characteristics or features, and executes an evaluation of thus chosen data. The retrieval section, using the genetic algorithm, finds out a combination pattern having preferable evaluation result. Accordingly, in recognizing signatures, it becomes possible to know beforehand what kind of personal characteristics or features data should be utilized for the recognition of the given signatures, thereby increasing the accuracy in the recognition.

Abstract: A signature recognition apparatus reduces the volume of training data needed and shortens the learning period. In the apparatus, a sample generating section generates sample data. A coupling load coefficient is determined based on the sample data, thereby obviating the need for additional sample data. The apparatus also uses a fuzzy net which implements a linear function in its output layer to shorten the learning period relative to the learning period required for a net implementing a non-linear function such as a sigmoid.

Abstract: An information medium recognition device for recognizing an information medium such as a handwritten signature inputted by performing an online input operation. The information medium recognition device is provided with an input portion for inputting the information medium (e.g.

Abstract: An information medium recognition device for recognizing an information medium such as a handwritten signature inputted by performing an offline input operation. The information medium recognition device is provided with a detection portion for scanning the information medium in different scanning directions and for detecting a stroke density corresponding to each of the scanning directions, an inference portion for converting the stroke density into a compressed fuzzy density by performing a fuzzy inference process on the stroke density corresponding to each scanning direction, which is detected by the detection portion, and a judgement portion for judging from the fuzzy density corresponding to each scanning direction whether or not the information medium is genuine.

Abstract: A linear motor elevator includes: a multitude of primary side coils mounted on the hoist way along the whole hoist path, and vertical columns of permanent magnets constituting the secondary side magnets mounted on the elevator car. The polarity of the permanent magnets alternate both horizontally across the columns and vertically along respective columns. When the elevator car is displaced horizontally in a direction perpendicular to the hoisting direction of the elevator car, a circulating current producing a magnetic flux that counterbalances the variation of the flux caused by the displacement flows through each primary side coils opposing the permanent magnets on the elevator car. Thus, the position of the elevator car within the hoist way is automatically adjusted in accordance with the null-flux method.

Abstract: A linear motor elevator includes permanent magnets 4 mounted on a pair of wing-shaped support members 21 secured on and projecting sideways from the right and the left side walls 3a of the elevator car 3. The polar axes of the permanent magnets 4 are arranged in the direction of the thickness of the support members 21, such that both the north and the south poles of the permanent magnets 4 are exposed on the front and the back surface of the support members 21 and hence are utilized effectively for producing driving force (thrust) for the elevator car 3. Each one of the right and the left side coils 20a and 20b of the primary side coils 20 for forming vertically translating magnetic field is bent at the middle to form two horizontally extending branches, such that the primary side coils 20 sandwich the permanent magnets 4 across predetermined gaps in the direction of polar axes of the permanent magnets 4, when the elevator car 3 passes by the primary side coils 20.

Abstract: A reactive power controller for controlling a reactive power output from a self-commutated inverter capable of eliminating an uncontrolled reactive power at the starting moment of its operation. The reactive power controller includes a device for producing a signal indicating amounts to be adjusted of an amplitude and a phase of an output AC voltage of the self-commutated inverter, in accordance with a DC voltage over a DC capacitor and an AC voltage of an AC system power source, and a device for adjusting the amplitude and the phase of the output AC voltage of the self-commutated inverter in accordance with the indication of the producing device.

Abstract: In a snubber circuit, two transformers for regenerating snubber energy are commonly provided for more than two switching elements in each of the arms of an inverter. The number of snubber energy regenerating transformers can be limited to only two, regardless of the number of switching elements. The circuit can be simple and compact, without decreasing the efficiency of regeneration of snubber energy.

Abstract: In an inverter supplied with power from a DC power supply whose voltage rises at a light load operation, if an overcurrent failure occurs at a light load operation at the inverter output side as seen from the DC power supply, a surge voltage higher than a voltage withstanding of the switching elements of the inverter is generated across the elements, the surge voltage being higher by the amount corresponding to a rise in the DC power supply voltage. Therefore, there arises a possibility of breaking the switching elements. This inconvenience can be solved by lowering the overcurrent detection level by the amount corresponding to a rise in the DC voltage, when a light load operation as seen from the DC power supply side is performed.

Abstract: A polyphase inverter includes a plurality of unit inverters connected to a single power source to form an a.c. output with the unit inverters being polyphase, thus to take out the resultant output. In this polyphase inverter, a series circuit including a capacitor and a fuse, and a reactor for protection coordination of the fuse are connected between the d.c. power source and each unit inverter. The resonance frequency of a resonance circuit constituted by the capacitor and the reactor is selected so that it is substantially equal to the product of the number of unit inverters, the number of pulses of the unit inverter, and the output fundamental frequency.