483 results about "Probability of failure" patented technology

A display system in which subsequent failures of plant equipment and plant systems are predicted to occur and in which the probability of failure before a specified date and the probability of failure after a specified date is determined and displayed and in which the calendar date is determined and displayed when the desired probability that the equipment not fail prior to the calendar date is specified. The system includes an Equipment Failure And Degradation Module that determines the remaining equipment/system life; a Probability-of-Failure Predictor Module that determines the probability of the equipment/system failing prior to a specified date and the probability of the equipment/system failing after a specified date; and a Date-of-Failure Predictor Module that determines the calendar date that corresponds to a specified probability that equipment not fail prior to the date.

A method of computing a manufacturing yield of an integrated circuit having device shapes includes sub-dividing the integrated circuit into failure mechanism subdivisions (each of the failure mechanism subdivisions includes one or more failure mechanism and each of the failure mechanisms includes one or more defect mechanisms), partitioning the failure mechanism subdivisions by area into partitions, pre-processing the device shapes in each partition, computing an initial average number of faults for each of the failure mechanisms and for each partition by numerical integration of an average probability of failure of each failure mechanism, (the numerical integration produces a list of defect sizes for each defect mechanism, and the computing of the initial average includes setting a maximum integration error limit, a maximum sample size for a population of each defect size, and a maximum number of allowable faults for each failure mechansim), and computing a final average number of faults for the integrated circuit by iterativelly reducing a statistical error of the initial average number of faults for each of the failure mechanisms until the statistical error is below an error limit.

A system for the representation, editing, evaluation, and inference of graphical models is disclosed which can be used to construct and evaluate a graphical model or graphical network and to calculate inference values. An efficient method of updating graphical models is demonstrated, and provides the basis for an improved system for manipulation and evaluation of probabilistic models. The graphical network editor is useful in the construction of graphical modes such as Bayesian Networks. The graphical network and network graphical user interface (GUI) are used in conjunction with each other to model a system wherein failure probabilities and the current state of components are taken into account to monitor the health and progress of a system for an engineer or engineering software to evaluate and monitor. The evaluation is useful in the monitoring of assets and other real systems having multiple, dependent, and independently operating components such as a pump, a manufacturing plant, a production line, an assembly line, where asset health and quality control is a concern. The asset components each influencing some overall outcome of a system or situation. Success or failure or probability of success, probability of failure and health of the system can be monitored and manipulated by altering the values of prior probability and posterior probability values. Failure correlation between components can be evaluated wherein failure rates of asset is unknown. Production and quality can be monitored and altered.

The present invention relates to a method of balancing a load and method of setting up a call using the load balancing method in a General Packet Radio Service (GPRS) network, which prevents a load from concentrating on a specific Gateway GPRS Supporting Node (GGSN) in the GPRS network, thus reducing a probability of failure in session establishment due to increased traffic. In the load balancing method, when a Service GPRS Supporting Node (SGSN) connected to a mobile node establishes a session, it selects a GGSN having a smallest number of established sessions among a plurality of GGSNs corresponding to an Access Point Name (APN) included in an Activate PDP Context Request message received from the mobile node and requests the selected GGSN to establish a session, thus solving a problem in which a load concentrates on a specific GGSN.

Methods and systems for use in predicting wind turbine failures are provided. One example method includes determining a parametric profile for a component of a wind turbine from operating data of a plurality of wind turbines, determining an anomaly profile for the component of the wind turbine from anomaly alerts from a plurality of wind turbines, and determining a probability of failure for the component of the wind turbine based on the parametric profile and the anomaly profile. The parametric profile defines at least one parametric event associated with the component prior to failure of the component, and the anomaly profile defines at least one anomaly associated with the component prior to failure of the component.

Failure analysis method and apparatus using failure rate data in coordination with the power on hours to more efficiently resolve computer system failures without occupying system memory or processor bandwidth. In response to a system failure, a baseboard management controller (BMC) notes the time of failure and the elapsed operating time of system components. In response to a failure of the computer system, the BMC accesses industry standard failure rate data correlating the elapsed operating time with the probability of failure for each component. By cross-referencing the time of failure with the failure rate data, the BMC automatically determines the probability of failure of each component at the time of failure of the computer system. The BMC generates a component replacement list identifying the component that currently has the highest probability of failure.

Determining when to perform preventative maintenance is an important consideration for maximizing the revenue of a wind turbine. For example, performing preventative maintenance may be cheaper than replacing turbine components when they fail. When determining to perform preventative maintenance, a maintenance scheduler may consider multiple factors. These factors may include the probability of failure, the predicted price of energy, predicted wind power production, resource constraints, and the like. Specifically, the maintenance scheduler may predict the future values of these factors which are then integrated into a net present value (NPV) for each of the components. Based on the respective NPVs, the maintenance scheduler may determine which maintenance actions to perform and in what order.

An imaging apparatus capable of reducing the possibility that shooting images fails, by preventing a subject from going out of the frame, being occluded and being recognized erroneously, and improving the usability of the tracking function. With this imaging apparatus, display information creating section 107 creates display information which calls for attention not to lose the sight of main subject 300 that is being tracked or not to make main subject 300 go out of the frame, and associates the created display information with main subject 300 that is being tracked to display on display screen 200.

Network devices and systems relating to prevention of large-scale network failure and determining a probability of a large-scale network failure for a network. The network devices may control rerouting of network traffic from failed network paths to preventative paths with probabilities of failure below determined thresholds. The network devices monitor and process real time data for dynamic and proactive rerouting when large-scale network failure occurs or is likely to occur.

The embodiment of the invention discloses methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and a system, relating to the technical field of wireless communications. The methods, devices and system are used for solving the problem of failure of OTDOA positioning because UE can not carry out OTDOA measurement. The methods comprise the following steps that: the UE determines the cells which can detect the signals self and sends the information of the cells to a positioning server according to the determination result; the positioning server selects the OTDOA measurement cells for the UE according to the information of the cells and sends the OTDOA assistance data including the information of the OTDOA measurement cells to the UE; and the UE carries out OTDOA measurement according to the OTDOA assistance data. By adopting the methods, devices and system, the possibility of failure of OTDOA positioning can be reduced.

To increase the reliability of a non-contact IC card for use in such applications as a door key, etc., two separate combinations of an IC chip and an antenna coil coupled to that chip are provided in the card, with each IC chip storing the same information, such as a key code. Since the probability of both of the IC chips being damaged concurrently due to application of external force is very much smaller than the probability of failure of a single IC chip, the objective of enhanced reliability is effectively achieved. S

A clog resistant, pilot operated pilot valve having two fluid paths, one path for fluid flow from the valve input to the valve output, and the second path for fluid flow through input and output pilot apertures. The opening and closing of the pilot apertures controls the flow of fluid between the input and output of the pilot valve. A clog resistant pilot operated valve in which fluid flows through the pilot fluid path only during the time of transition from an valve open to a valve closed condition, or vice-versa, thereby reducing the probability of failure due to contaminants blacking the pilot activation path. A clog resistant pilot operated valve in which the plunger, used to open and close the pilot fluid paths, is ribbed in construction to reduce the probability that contaminants will cause seizure of the plunger movement.

Disclosed are an encoding device and a decoding device which can effectively reduce the decoding failure frequency in LDPC encoding/decoding. A loss correction encoding device (120) includes a padding unit (121) which adds a padding packet to an information packet sequence; an interleave unit (122) which rearranges the padding packet and the information packet; and a loss correction encoding unit (123) which performs loss correction encoding for the packet string after the interleave. The interleave unit (122) rearranges the padding packet and the information packet according to variable nodes constituting a minimum stopping set of the inspection matrix which defines a low-density parity inspection code. The interleave unit (122) uses such a rearrangement pattern that avoids a loss correction failure by the minimum stopping set of the LDPC inspection matrix so as to reduce the probability of the loss correction failure by the minimum stopping set.

The invention discloses a wind turbine generator main gear fault diagnosis method of multi-feature multilevel comprehensive judgment. As to a wind turbine generator to be tested, a sensor and characteristic value two-stage evaluation model can be obtained by one time collection of historical data. When the wind turbine generator runs, real-time running data of a gear box can be collected. As to a fault of a component, a corresponding digital signal processing algorithm can be called to process the collected data. Typical characteristic value is obtained from the collected data and used as input parameters of the sensor and characteristic value two-stage evaluation model. Vector quantity of the final judgment result of the model is the fault rate of the component. The probability of failure of components of the whole generator can be obtained by loop execution of the procedure. The wind turbine generator main gear fault diagnosis method of the multi-feature multilevel comprehensive judgment is capable of monitoring real-time online status and diagnosing faults of different kinds of wind turbine generator gear boxes, simple, fast and stable in diagnosing method and strong in fault tolerance.

In the field of communications technologies, a message handling method and a message handling device are provided. The method includes: a notification indicating whether an X2 interface to a neighbor node is available is received; using an S1 interface to send information when the X2 interface is unavailable; and/or receiving a notification indicating whether an S1 interface to a neighbor node is available, and using an X2 interface to send information when the S1 interface is unavailable. The technical solutions can ensure normal communication, and reduce possibility of communication failure.

The invention discloses an icon placement method and a mobile terminal of a display interface. The display interface comprises at least one menu page. The method comprises the following steps: starting an icon placement mode, and icons are in a floating state capable of being freely selected and being movable; detecting the number of the icons in each menu page, and recording menu page identifications (ID) which are less than singlepage icon valve values in number of the number of the icons; activating a floating window which is displayed on a current menu page, and the interior of the floating window is provided with page thumbnails corresponding to the recorded menu page IDs; detecting and recognizing operation which enables the icons of the current menu page to a page thumbnail in the floating window; and renewing positions of icons to be moved to interiors of the menu pages corresponding to the page thumbnails. The icon placement method and the mobile terminal of the display interface achieve fast and convenient moving operation of the icons in the different menu pages, can greatly reduce probability of failure operation, and are simple in function activation and exiting operation, high in intellectualization degree, and good in user experience.

An improved method of selecting and planning the performance of various maintenance activities on a facility such as a nuclear power plant includes determining the net present value of a number of future net savings that are expected to result from performance of the maintenance activity at a given time, and selecting and planning the maintenance activities in a fashion that maximizes net present value. The method includes, for each of a number of components and a number of time periods, determining a change in the probability that a component will fail within a time period, with the change resulting from an assumption that a maintenance activity is performed. The change in probability is multiplied with the losses associated with a failure in order to determine a gross savings from which costs are subtracted to determine net savings. The probabilities of failure may be determined from a probability failure model that has been derived from multiple sets of failure data that are characterized by Weibull distributions and are mathematically combined according to Bayes' Theorem. The maintenance activities may also be optimized according to a number of budget figures. An apparatus for performing the method is also disclosed.

A method for signaling a failure condition of a bearing of a turbocharger that includes a sensor configured for sensing information on off-axis rotor motion. The method entails receiving a stream of information from the sensor, decomposing the stream of information into a set of components representing different frequencies, using a subset of components that represent a range of frequencies known to be indicative of bearing failure to calculate a probability of failure of the bearing, signaling a failure condition of the bearing if the probability of failure exceeds a critical threshold, and if the present indicia of off-axis rotor motion does not indicate a complete failure condition has occurred, determining a time interval until another probability of failure of the bearing will be calculated. The time interval can vary based upon the rate that the probability of failure has changed over multiple time intervals.

A probabilistic estimation of fatigue crack life of a component is provided. A plurality of representations of the component is defined from material property scatter data and flaw-size scatter data, wherein each representation is defined by one possible material condition and flaw-size condition associated with the component. For each representation, a component location is selected and a determination is made whether said individual representation fails after a given number of cycles N, based on the calculation of a crack growth in the selected location. The crack growth is calculated on the basis of the material condition and the flaw-size condition in the selected location. Failure of the individual representation is determined if the crack growth is determined to be unstable. The sum total of the number of the representations that failed after N cycles is determined. A probability of failure of the component after N cycles is then determined.

The invention relates to the diagnosis of faults and damage in a gearbox in order to predict the operational life of a gearbox. An end of line test is performed to infer information on each gearbox on the production line. A highly detailed model of the gearbox is created to determine the optimal sensor positions for the end-of-line test so that the test can discriminate between different types of manufacturing variation. This information is then used to construct a unique, highly detailed model for each gearbox. During operation, forces and moments acting on the gearbox are measured at regular intervals and the model is used to continuously update a prediction of the total damage on each gearbox component. The probability of failure in a given time period is then calculated. An existing condition monitoring system approach such as vibration analysis may be used in parallel with the model-based diagnosis. The overall probability of failure for a required lifetime is calculated and, if necessary, operation is limited to provide a required probability of failure in a given time period.

The embodiment of the invention provides a lane changing method and a lane changing device of an unmanned vehicle and a computer-readable storage medium. The lane changing method of the unmanned vehicle comprises the following steps: based on the driving intention of a main vehicle, determining candidate lanes to be entered through lane change; based on the lane changing condition of each candidate lane, screening the candidate lanes; selecting a target lane of the main vehicle during the lane change from the screened candidate lanes; judging whether the main vehicle is safe during the changefrom the current lane to the target lane; under the condition that a judgment result is safe, changing the lane. According to the embodiment of the invention, a safe and reasonable lane changing decision is given through comprehensive judgment according to information such as the lane changing conditions, so that the lane most suitable for driving can be selected and a safe time point is selectedfor the lane change, and thus the probability of failure occurrence is greatly reduced and the safe and smooth lane change of the unmanned vehicle is guaranteed.

A process for evaluating space systems for safety assurance and residual risk to the flight crew. The process includes a success oriented System Safety phase which attempts to reduce the probability of failure with respect to the loss of a crew member as low as practical; a failure oriented SPACESAFE phase which assumes that at least one Safety Critical Subsystem has failed and attempts to engineer a risk mitigation design minimize adverse effects on the crew; and an Integration phase which complimentary integrates the System Safety phase with the SPACESAFE phase. Such process allows for increased flight crew safety by minimizing risk of a failures that contribute to loss of a crew member.

An apparatus that can lower the possibility of failing reception modulation in communication where data is transmitted with and without directivity and prevent deterioration of transmission efficiency caused by retransmission. With this apparatus, a gain control signal multiplex section (203) time division multiplexes a directional transmission signal and a gain control signal. A transmission level control section (204) controls the transmission power level of a gain control signal so that the transmission power level of the gain control signal is smaller than the transmission power level of a directional transmission signal and the received power level of the gain control signal is larger than a received power level of a nondirectional transmission signal at the receiving side, and controls the transmission power level of a directional transmission signal so that the received power level of the directional transmission signal is larger than the received power level of a nondirectional transmission signal and the received power level of a gain control signal at the receiving side.