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480 results about "Performance model" patented technology

Mixed storage system and method for supporting solid-state disk cache dynamic distribution

The invention provides a mixed storage system and method for supporting solid-state disk cache dynamic distribution. The mixed storage method is characterized in that the mixed storage system is constructed through a solid-state disk and a magnetic disk, and the solid-state disk serves as a cache of the magnetic disk; the load characteristics of applications and the cache hit ratio of the solid-state disk are monitored in real time, performance models of the applications are built, and the cache space of the solid-state disk is dynamically distributed according to the performance requirements of the applications and changes of the load characteristics. According to the solid-state disk cache management method, the cache space of the solid-state disk can be reasonably distributed according to the performance requirements of the applications, and an application-level cache partition service is achieved; due to the fact that the cache space of the solid-state disk of the applications is further divided into a cache reading section and a cache writing section, dirty data blocks and the page copying and rubbish recycling cost caused by the dirty data blocks are reduced; meanwhile, the idle cache space of the solid-state disk is distributed to the applications according to the cache use efficiency of the applications, and therefore the cache hit ratio of the solid-state disk of the mixed storage system and the overall performance of the mixed storage system are improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Performance prediction and fault alarm method for photovoltaic power station

The invention discloses a performance prediction and fault alarm method for a photovoltaic power station. The method comprises the following steps of: a, setting the station of the power station; b, setting the operation mode of the power station; c, judging whether required real-time data or historical data exists or not; d, predicting the performance of the power station through an experience model if the state in the step a is that a new photovoltaic power station is required to be designed and the required real-time data or historical data in the step c does not exist, and predicting the performance of the power station through a data drive performance model if the required real-time data or historical data in the step c exists; e, predicting the performance of the power station through the data drive performance model or a polynomial regression model if the photovoltaic power station in the step a is operated and the required real-time data or historical data in the step c exists, and predicting the performance of the power station through the experience model if the required real-time data or historical data in the step c does not exist; f, comparing actual performance with the predicted performance, and performing fault alarm; and g, correcting the models on line by a Kalman filtering method and returning to the step c, and otherwise, directly returning to the step e. By the method, solar energy resources can be utilized to the maximum extent, and power utilization cost can be reduced; and the accuracy of performance prediction and fault diagnosis is improved.
Owner:AUTOMATION RES & DESIGN INST OF METALLURGICAL IND

Network performance measurement diagnostic method and system based on transmission control protocol (TCP)

The invention discloses a network performance measurement diagnostic method based on a transmission control protocol (TCP). The method comprises the following steps: receiving a test request and target performance parameters transmitted by a client; transmitting detection flow to the client according to the test request, carrying out TCP network performance measurement and capturing background data packets to check a TCP network performance measurement result; analyzing the checked TCP network performance measurement result according to a TCP performance model and the target performance parameters; and gathering measurement data obtained in the TCP network performance measurement process and the TCP network performance measurement analysis result, and generating a TCP network performance measurement diagnostic report. By utilizing the network performance measurement diagnostic method and system based on the TCP provided by the embodiment of the invention, the problem that TCP hidden underlying errors and error symptoms are in proportion to the round-trip time is solved, the inference of the detection flow to network background flow is reduced, and the sensitiveness to local link errors is obviously improved.
Owner:南通隐印科技有限公司
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