680 results about "Self-tuning" patented technology

A proactive, resilient and self-tuning memory management system and method that result in actual and perceived performance improvements in memory management, by loading and maintaining data that is likely to be needed into memory, before the data is actually needed. The system includes mechanisms directed towards historical memory usage monitoring, memory usage analysis, refreshing memory with highly-valued (e.g., highly utilized) pages, I/O pre-fetching efficiency, and aggressive disk management. Based on the memory usage information, pages are prioritized with relative values, and mechanisms work to pre-fetch and/or maintain the more valuable pages in memory. Pages are pre-fetched and maintained in a prioritized standby page set that includes a number of subsets, by which more valuable pages remain in memory over less valuable pages. Valuable data that is paged out may be automatically brought back, in a resilient manner. Benefits include significantly reducing or even eliminating disk I/O due to memory page faults.

Systems and method of the present disclosure are directed to a network security tool. In some embodiments, the tool identifies a current vulnerability of a private network. The tool can determine a signature of an attack configured to exploit the current vulnerability. The tool can comparing the signature with active and inactive signatures stored in a signature repository. The tool can compare the signatures to identify an inactive signature corresponding to the signature of the attack configured to exploit the current vulnerability. The tool can automatically activate, responsive to the comparison, the identified inactive signature. The tool can use the activated signature to identify an exploit based on data packets received via the private network.

Systems and designs for tuning a wireless power transfer system are provided, which may include any number of features. In one embodiment, a wireless power transfer system can be configured such that resonant frequencies of the system move towards an operating frequency of the system as a coupling coefficient between the transmit and receive resonators becomes smaller. In another embodiment, a receive controller can be configured to control a current delivered to a DC load by comparing an actual current at the DC load to a current requested by the DC load and adjusting an angle or a magnitude of a voltage at the DC load to match the requested current. In another embodiment, a rectifier circuit can act as a controlled voltage source and be configured to tune resonant frequencies between the transmit resonator and the receive resonator. Methods of use are also provided.

Database partition monitoring and dynamic logical partition reconfiguration in support of an autonomic self-tunable database management system are provided by an automated monitor that monitors one or more resource parameters in a logical partition running a database application in a logically partitioned data processing host. The monitor initiates dynamic logical partition reconfiguration in the event that the parameters vary from predetermined parameter values. In particular, the monitor can initiate removal of resources if one of the resource parameters is being underutilized and initiate addition of resources if one of the resource parameters is being overutilized. The monitor can also calculate an amount of resources to be removed or added. The monitor can interact directly with a dynamic logical partition reconfiguration function of the data processing host or it can utilize an intelligent intermediary that listens for a partition reconfiguration suggestion from the monitor. In the latter configuration, the listener can determine where available resources are located and attempt to fully or partially satisfy the resource needs suggested by the monitor.

A self-tuning variable impedance circuit provides improved performance. A variation in the power applied to the variable impedance circuit causes a corresponding change in the impedance of the circuit, resulting in improved performance. For example, the variable impedance circuit may be a matching circuit that “follows” the output power of a power amplifier, thereby increasing the power efficiency of the power amplifier.

A data processing system and method in a computer network are disclosed for improving performance of a link aggregation system included in the network. Parameters are established which are utilized to determine performance criteria of the link aggregation system. A performance of the link aggregation system is determined by determining the performance criteria. The performance of the link aggregation system changes in response to a flow traffic burden on the link aggregation system changing. The link aggregation system dynamically modifies the parameters in response to the changing performance of the link aggregation system. The link aggregation system is self-tuning and capable of automatically adjusting to a changing flow traffic burden on the link aggregation system.

A high-Q human-portable, battery-powered self-correcting tunable resonator in a transmitter apparatus for inducing alternating currents of high quality in buried conductors to facilitate their location. The transmitter apparatus employs an FET-driven capacitive tuning circuit and a coil design that achieves high precision, high-quality transmission signals, and which is equipped with a high-voltage booster for facilitating fault-localization applications.

Fuzzy logic is utilized to control an RF amplifier and associated tuner for continuous self-optimization and automatic load matching to at least double the battery life of a battery-powered transmitter.

A switched mode power can use a digital controller to control the switching of the at least one switch of the switched mode power supply. The current through the power inductor can be estimated using a self-tuning digital current estimator.

The invention discloses a phase-locked loop and an automatic frequency calibration circuit thereof. The phase-locked loop comprises a phase/frequency detector, a charge pump, a filter, a voltage-controlled oscillator (VCO) and a first frequency divider which are connected in sequence, wherein the phase-locked loop further comprises the automatic frequency calibration circuit; the automatic frequency calibration circuit reduces the oscillation frequency CKV of the VCO when the oscillation frequency CKV of the VCO after undergoing frequency division by the first frequency divider is higher than the reference frequency CKR, and increases the oscillation frequency CKV of the VCO when the oscillation frequency CKV of the VCO is lower than the reference frequency CKR; and a precharging circuit A0 is connected at the input end of the filter and carries out precharging when AFC carries out searching. The phase-locked loop has the rapid self-tuning locking function and ensures the VCO to carry out coarse tuning automatically to approach the final tuning coil, thus reducing the locking time of the phase-locked loop.

A system is provided for detecting unsolicited bulk email (spam). A list server receives email from various senders as well as queries regarding the senders. A database is used for storing information corresponding to the amount of unsolicited bulk email received at the spamtrap addresses. The list server dynamically makes a determination as to which senders are transmitting a disproportionate amount of email and should be labeled as spammers. The determinations made by the list server are based on the amount of unsolicited bulk email received from senders relative to the total amount of email transmitted by senders.

Techniques are disclosed for compensating for crosstalk using adaptation of data signals transmitted over respective channels of a communication system. For example, a method includes the following steps. A first set of estimated measures of crosstalk is obtained for at least a selected portion of a plurality of communication channels over which data signals are to be transmitted from a transmitter to at least a selected portion of a plurality of receivers. A first set of data signals based on the first set of estimated measures of crosstalk is adapted to generate a first set of adjusted data signals. The first set of adjusted data signals is transmitted to corresponding ones of the plurality of receivers. A second set of estimated measures of crosstalk is obtained for the selected portion of the plurality of communication channels. A second set of data signals for transmission based on the second set of estimated measures of crosstalk is adapted to generate a second set of adjusted data signals. Iteration of the obtaining, adjusting and transmitting steps is performed so as to reduce an error between subsequent estimated measures of crosstalk and actual measures of crosstalk for the plurality of communication channels.

A method and apparatus for a robotic machining process that gives a controlled removal rate of material from a workpiece when an object, tool or workpiece, held by a robot is brought into contact with a stationary object, workpiece or tool. A signal indicative of the force applied by the held object t the stationary object is used to control the rate at which the robot moves the held object in relation to the stationary object. Associated with the robot is a controller that has tunable proportional and integral gains. The controller determines a command for the feed rate of the tool when the tool engages the workpiece. In response to that command, the proportional and integral gains are tuned to obtain a cutting force to be applied to the workpiece when the tool engages the workpiece that is substantially the same as a desired cutting force.

A method, apparatus and program storage device for providing adaptive, attribute driven, closed-loop storage management configuration and control is disclosed. The closed loop control mechanism provides not only continuous self-tuning to the storage system, but also allows the system to perform the initial configuration better.

A method and related ultrasonic meter identify and correct for transit time errors such as peak switch errors. The method includes calculating values for a set of diagnostics from measurements of the fluid flow, including transit time measurements. Based on the values for the diagnostics, and whether and how they fall outside of their respective ranges, the meter can identify a variety of problems with the meter or fluid flow, such as whether there has been an intermittent peak switch, a permanent peak switch, or the presence of noise, velocity pulsation in the fluid flow, temperature stratification, or other problem. In the event there is a problem with the meter, the meter self-tunes in order to minimize the chances of the problem happening again.

A system and method of use for self-tuning a PID controller utilized with an exciter and generator is disclosed. The system includes a power source, an exciter electrically connected to the power source, a generator that is electrically energized by the exciter, and a processor that provides a PID controller that calculates an estimated exciter time constant and an estimated generator time constant using particle swarm optimization (“PSO”) to control exciter field voltage. The particle swarm optimization (“PSO”) technique includes increasing the voltage reference by a predetermined percentage over a predetermined time period, initializing each particle position of exciter time constant and generator time constant, calculating generator voltage, performing a fitness evaluation and then obtaining and updating best values. This is followed by repeating the steps of determining the generator voltage, the fitness evaluation, and the best values over a predetermined number of iterations.

Embodiments of the present invention concern a multiphase switch-mode power supply. The multiple phase switch-mode power supply can have at least one switch and a digital controller to control the switching of the at least one switch. During a calibration period, the digital controller can freeze the current of all of the multiple phases except for a phase being calibrated. This can be done by fixing the current reference of the phases except for the phase being calibrated.

The antenna of an RFID tag is automatically tuned by controlling both the real and imaginary components impedance “seen” by the antenna. The real component (resistive) is controlled by controlling a tap of a charge pump circuit of the tag. The imaginary (reactive) component is controlled by connecting one or more reactive elements of an antenna tuning circuit to the antenna. The real component is controlled by a first digital control loop that automatically activates successive taps on a charge pump of the RFID tag which effectively controls the resistance seen by the antenna. A second digital control loop controls the connection of the various reactive components.

In one embodiment, an acoustic distance measurement system can dynamically adjust its measurement frequency to a frequency that is within a preselected bandwidth of the resonant frequency of an acoustic transducer used in making acoustic distance measurements.