476 results about "Performance curves" patented technology

The invention relates to a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods. One embodiment of the invention includes a method for predicting performance of a patterned flooding process in a subterranean hydrocarbon-bearing formation, said formation being penetrated by a plurality of injector wells and producer wells, comprising the steps of: determining flow-based pairs of injector to producer wells [FIG. 4, item 78a] (first well pairs) using a geological model [item 76]; developing a connective pore volume distribution curve for each first well pair item [78b]; selecting at least two first well pairs (selected well pairs) that reflect narrow and wide connective pore volume distributions that correspond to high and lower oil recovery levels; developing a 3-D simulation model for each selected well pair, performing a reservoir simulation for each selected well pair for the corresponding flooding process; and generating prototype performance curves for each selected well pair. An alternate embodiment of the invention includes a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods where injection well location, production well location, a process parameter, or a well processing rate is modified.

A wind power generation evaluation system includes: a laser aerovane that measures, with a laser, the direction and velocity of wind at a distance from a wind power generator' connected to an electric power system, to predict the direction and velocity of wind at the wind power generator; a second aerovane that measures the wind velocity and direction at the wind power generator; a wind power generation output calculation unit that integrates difference between power outputs calculated based on measurements by the laser aerovane and by the second aerovane, while referring to a windmill performance curve indicating output power characteristics of the wind power generator with respect to wind velocity, to produce a difference between the amounts of generated power; and an additional value calculation unit that calculates additional value of an influence on the environment based on the difference between the amounts of generated power produced by the calculation unit.

The present invention provides methods for using time domain analysis of NEXT, Return Loss and the like, in conjunction with the application of time or distance referenced limits to verify and determine compliance of the performance requirements of connections in a typical link. Time domain analysis of NEXT, Return Loss data and the like, suitably provides the performance characteristics of a link as a function of time or distance. When coupled with time or distance performance curves for connections, it can be determined if the transmission fault is at a connection or in the cable. The time limit curves for connections can be generated based on the frequency domain performance requirements for connecting hardware of a specific level of performance. The connection time limit curves thus provide an interpretation means to determine if the connection is within performance standards, allowing improved isolation of the fault condition.

Various embodiments of methods and systems for thermally aware scheduling of workloads in a portable computing device that contains a heterogeneous, multi-processor system on a chip (“SoC”) are disclosed. Because individual processing components in a heterogeneous, multi-processor SoC may exhibit different processing efficiencies at a given temperature, and because more than one of the processing components may be capable of processing a given block of code, thermally aware workload scheduling techniques that compare performance curves of the individual processing components at their measured operating temperatures can be leveraged to optimize quality of service (“QoS”) by allocating workloads in real time, or near real time, to the processing components best positioned to efficiently process the block of code.

The invention relates to a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods. One embodiment of the invention includes a method for predicting performance of a patterned flooding process in a subterranean hydrocarbon-bearing formation, said formation being penetrated by a plurality of injector wells and producer wells, comprising the steps of: determining flow-based pairs of injector to producer wells [FIG. 4, item 78a] (first well pairs) using a geological model [item 76]; developing a connective pore volume distribution curve for each first well pair item [78b]; selecting at least two first well pairs (selected well pairs) that reflect narrow and wide connective pore volume distributions that correspond to high and lower oil recovery levels; developing a 3-D simulation model for each selected well pair, performing a reservoir simulation for each selected well pair for the corresponding flooding process; and generating prototype performance curves for each selected well pair. An alternate embodiment of the invention includes a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods where injection well location, production well location, a process parameter, or a well processing rate is modified.

A method of determining the lower limit of decoding resolution in a digital imaging-based bar code symbol reader. A software-based optical design program is used to generate the composite DOF chart of image formation optics employed in the digital imaging-based bar code symbol reader. The modulation transfer function (MTF) of the object image is used to determine the smallest mil size code that can be decoded, at a given object distance, to produce an optical performance curve. The program calculates the size of the field of view (FOV) of a single sensor pixel, when projected through the image formation optics and out into object space. For both the 1.4 and 1.6 sampling limit pixel rules, the calculated FOV values are plotted on the same axes as the optical performance curve. Using graphical solution techniques, the sampling limit line of choice determines the lower limit of the decoding resolution in the imaging-based bar code symbol reader.

Various embodiments of methods and systems for controlling and / or managing thermal energy generation on a portable computing device that contains a heterogeneous multi-core processor are disclosed. Because individual cores in a heterogeneous processor may exhibit different processing efficiencies at a given temperature, thermal mitigation techniques that compare performance curves of the individual cores at their measured operating temperatures can be leveraged to manage thermal energy generation in the PCD by allocating and / or reallocating workloads among the individual cores based on the performance curve comparison.

The invention discloses a heat exchanger performance test-bed, which comprises an air circulation system, an oil circulation system, a water / ethylene glycol circulation system and a compressed air system that are respectively connected with a test piece. The heat exchanger performance test-bed of the invention, on the one hand, simulates the working condition of the tested heat exchanger test piece so as to test whether the heat transfer capacity and the resistance are qualified for the design regulation requirements, on the other hand, by testing the standard test piece, the performance curve data of fins which have different types and specifications is obtained, and the fin performance database is established and enriched, thereby the design can reach a better, higher and more economical level.

A system for pumping blood to assist or assume the cardiac function of a patient is characterized by a blood pump that exhibits a steep performance curve such that only small changes in pump flow occur for large changes in differential pressure across the pump. The pump therefore exhibits flow-limiting characteristics to protect the physiological system against harmful flow rates or pressures. Pump flow may also be limited by controlling the current provided to a driver from a power supply or by suitable restrictions within or external to the pump housing.

The present invention discloses a system of energy-efficient and constant-pressure fluid-transport machines coupled in parallel, which can flexibly and massively provide gas and water to every fabrication unit. The system of the present invention comprises: variable-frequency centrifugal fluid-transport machines, pressure gauges, power meters, flow meters, and controllers. The performance curves of the abovementioned system of fluid-transport machines coupled in parallel and the system impedance curves of the loads are analyzed theoretically and built in the controllers together with the equal-efficiency curves provided by the manufacturer. When the system is operating, the data detected by the pressure gauges, power meters, and flow meters are compared with the built-in data to obtain the optimal energy-efficient conditions as the operational criteria of the system of the present invention.

An apparatus and method for predicting cognitive performance of an individual based on factors including preferably sleep history, the time of day, and the individual's activities. The method facilitates the creation of predicted cognitive performance curves that allow an individual to set his / her sleep times to produce higher levels of cognitive performance. The method also facilitates the reconstruction of past cognitive performance levels based on sleep history.

The invention relates to a microstrip dual-mode filter of nesting ring-structured parallel feeder lines, comprising a front part metal microstrip line, a back part metal coating, an interlayer dielectric slab and an input / output port. Structure of the metal microstrip line consists of a multiplex nesting ring-structured dual-mode resonator, an input feeder line and an output feeder line of which are arranged on the same horizontal line; the input feeder line and the output feeder line are gap-coupled with an internal resonator by a pair of U-shaped coupling arms; and a perturbation which is formed by the linewidth difference Delta m between an inter loop line and an outer loop line and the small patch on a perpendicular symmetric line controls degenerate mode and adjusts two output zero positions. Compared with the traditional microstrip dual-mode filter of parallel feeder lines, the invention has the advantages of less size and better frequency selectivity, and can flexibly adjust the output performance curve zero position of the filter. The invention can be used for designing a narrowband band-pass filter of a wireless communication system and be applicable for filter miniaturization requirement of the wireless communication system.

An apparatus and method for predicting cognitive performance of an individual based on factors including preferably sleep history, the time of day, and the individual's activities. The method facilitates the creation of predicted cognitive performance curves that allow an individual to set his / her sleep times to produce higher levels of cognitive performance. The method also facilitates the reconstruction of past cognitive performance levels based on sleep history.

The invention provides a method for calibrating the performance curve of a single water pump in an urban water plant pump station. The urban water plant pump station comprises multiple pumps in parallel connection, and the method includes: (1), monitoring data collecting: obtaining historical data of operating state of the pump station through monitoring instruments mounted at an inlet and an outlet of the pump station; (2), monitoring data processing: utilizing the historical data of the operating state of the pump station measured in the step (1) to obtain total flow, total pumping head and electricity consumption of the pump station and operating state of the single water pump so as to generating processing data; (3), monitoring data analyzing: adopting the regional sensitivity analysis method to the data generated in the step (2), and calculating performance curve parameters of the single water pump in the pump station according to a given pump station performance curve equation; and (4), applying parameters: subjecting the performance curve parameters of the single water pump obtained in the step (3) to simulating application to obtain the performance curve, energy consumption evaluation and improvement scheme of the single water pump and optimized scheduling of the pump station.

A computer processor implemented method of determining system configuration information of a monitored electrical system without the need for user input by constructing a data set of a standard performance curve for at least one system type; defining at least one characteristic feature for each system type; determining the required data to identify at least one system type according to at least one of the standard performance curve and characteristic feature; remotely acquiring the required data; comparing system acquired electrical system data to at least one system type and correlated standard performance curves and correlated characteristic features to provide system configuration information for at least one monitored electrical system to provide the specific type of monitored electrical system.

The invention provides a design method for a centrifugal pump impeller which can meet the requirements of multiple working points. The characteristics of the design method are as follows: when the centrifugal pump impeller is in design, geometric parameters of the centrifugal pump impeller are associated with performance parameters of different working points, so as to achieve the effect that the designed performance curve of a pump is overlapped with the required performance curve. The geometric parameters of the impeller which is designed by the method in the invention can be adjusted so as to achieve the purpose that the performance of the centrifugal pump can meet the requirements of multiple working points. The design method can ensure the consistency between the actual running performance curve of the centrifugal pump and the required performance curve, and is particularly suitable for designing the centrifugal pump impeller with strict requirements of multiple working points.

The invention discloses a noise eliminating system and method, an intelligent control method and device, and communication equipment, wherein the intelligent control method comprises the following steps of: in the event of detecting that a receiving end of the communication equipment does not have voice signal output, receiving outside noise signals from a reference microphone away from ears and monitoring signals from a monitoring microphone near the ears; carrying out performance analysis on the received outside noise signals and monitoring signals, and estimating a noise reduction performance curve subjected to feed-forward active noise estimation process; and adjusting parameters of a control circuit in the feed-forward active noise estimation process according to the noise reduction performance curve and a pre-set noise reduction performance curve, so that the difference between the estimated noise reduction performance curve and the pre-set noise reduction performance curve is within a pre-set range. By means of the noise eliminating system and method, the intelligent control method and device, and the communication equipment disclosed by the invention, the noise reduction stability in the communication equipment can be effectively increased; and the noise reduction performance inconsistency of the communication equipment in the use process because of ear coupled difference can be avoided.

The present invention discloses a system of energy-efficient and constant-pressure parallel-coupled fluid-transport machines, which can flexibly and massively provide gas and water to every fabrication unit. The system of the present invention comprises: variable-frequency centrifugal fluid-transport machines, pressure gauges, power meters, flow meters, and controllers. The performance curves of the abovementioned system of parallel-coupled fluid-transport machines and the system impedance curves of the loads are analyzed theoretically and built in the controllers together with the equal-efficiency curves provided by the manufacturer. When the system is operating, the data detected by the pressure gauges, power meters, and flow meters are compared with the built-in data to obtain the optimal energy-efficient conditions as the operational criteria of the system of the present invention.

An air flow control damper consisting of either a tubular or rectangular casing, an internal annular orifice and within the orifice a rotatable circular or rectangular blade with an air foil profile. The blade may be either single or multi-part. The air flow control blade is designed to rotate on a shaft from an open position to a closed position modulating the air flowing through the casing. This damper exhibits a very low pressure drop—important for energy conservation—and a linear hystersis free performance curve—important when maintaining pressures in critical spaces.

The invention provides a hydraulic design method of an impeller of a centrifugal pump satisfying the requirements of four working condition points. The method is characterized in that the hydraulic design of the impeller of the centrifugal pump is carried out, and the geometrical parameters of the impeller of the centrifugal pump and the performance parameters of the four working condition points are associated, thus the effect of the coincidence of the actual performance curve and the required performance curve is achieved. The geometrical parameters of the impeller can be adjusted by adopting the impeller designed by method provided by the invention, and purpose of ensuring the performance of the centrifugal pump to satisfy the requirements of the four working condition points is achieved. According to the invention, the consistency of the actual running performance curve and required performance curve of the centrifugal can be ensured, and the method provided by the invention is especially suitable for the hydraulic design of the impeller of the centrifugal pump which has severe requirements for the performance.

Methods and apparatus for enhancing performance curve generation, damage monitoring, and improving non-destructive testing performance. Damage standards used for performance curve generation are monitored using a non-destructive testing (NDT) sensor during a damage evolution test performed with the standard. The evolution test may be intermittently paused to permit ground truth data to be collected in addition to the NDT sensor data. A damage evolution model may be used to estimate ground truth data during the intervening periods of the damage evolution test. The NDT sensor data and ground truth data are used to generate performance curves for the NDT system. Multiple sensors may be monitored at multiple locations on the damage standard and multiple damage evolution tests may be performed with multiple damage standards.

The invention provides a method for obtaining a high-efficiency low-noise impeller of a centrifugal pump volute. Firstly main structure sizes: impeller inlet diameter, impeller outer diameter, blade number, blade thickness, blade inlet placing angle, outlet placing angle, blade wrap angle and blade length of a centrifugal pump impeller are obtained through a traditional method. The method includes: 1) measuring centrifugal pump constant performance of the impeller with the structure sizes; 2) predicting centrifugal pump unsteady performance; 3) performing internal flow field analysis and structural improvement on a centrifugal pump; 4) evaluating performance of the improved centrifugal pump, and testing H-Q, N-Q and h-Q performance curves, particle swarm optimization (pos) and program specification block (psb) variation curves; and 5) providing a novel improvement project according to analysis, and evaluating the performance of the centrifugal pump until an ideal centrifugal pump is obtained.

A method for indicating a performance of a wind turbine is provided. Target performance data are created based at least in part on performance data for one or more wind turbines of interest. Baseline performance data are calculated based at least in part on performance data for a plurality of other wind turbines. The target performance data are compared to the baseline performance data to create a relative performance profile. In addition, a graphical representation of the relative performance profile may be created, and an available upgrade for the wind turbines of interest may be evaluated based at least in part on performance data for one or more wind turbines including the available upgrade.

An analysis method for objective factor affecting generator set energy efficiency comprises the following steps of acquiring generator set parameters including generator set design parameters, boiler practical coal combustion amount, current environment temperature, turboset circulating water temperature, load rate, turboset heat supplying and generating ratio and turboset generation amount, calculating external condition deviation according to the boiler practical coal combustion amount, current environment temperature, turboset circulating water temperature, load rate, turboset heat supplying and generating ratio and turboset generation amount, calculating boiler efficiency deviation, turboset efficiency deviation and station service power consumption rate deviation according to a boiler performance test, a turboset performance test and a station service power consumption rate test under multi-work conditions, calculating net coal consumption rate deviation of the multi-work conditions according to the boiler efficiency deviation, turboset efficiency deviation and station service power consumption rate deviation, generating equipment performance curve according to multi-load points and net coal consumption rate deviation, and calculating objective factors of the current load according to external condition deviation and the equipment performance curve.

The invention discloses a gas-liquid two-phase flow performance testing system and method for a centrifugal pump. The system is mainly composed of a liquid storage tank, an inlet pipeline, a gas inlet pipe branch, a variable frequency pump unit and an outlet pipeline. An inlet in the middle of the liquid storage tank is connected with the outlet end of the variable frequency pump unit through the outlet pipeline, the inlet end of the variable frequency pump unit is connected to an outlet in the bottom of the liquid storage tank through the inlet pipeline, and the inlet pipeline is further connected with the gas inlet pipe branch. By collecting signals of a pressure sensor and a torque meter of the variable frequency pump unit, lift and efficiency curves under gas-liquid two-phase flow with different gas contents are obtained. By analyzing signals of a vibration acceleration sensor, a flow quantity vibration curve is obtained. By collecting inlet pressure and the signals of the pressure sensor, cavitating performance curves of the centrifugal pump under the gas-liquid two-phase flow with different gas contents are obtained. A closed circulation loop is formed, and gas-liquid two-phase flow performance testing, vibration testing, cavitating performance testing and the like of the centrifugal pump can be realized. The system is simple in structure, high in testing efficiency and high in testing accuracy.

The invention discloses a real-time monitoring and preventing method for surge and stall of an axial flow fan, wherein the method can monitor parameters of installation angles, air quantity, pressure heads and the like of a movable blade of a fan in real time and send monitoring values into a working point corresponding to a fan performance curve in a monitoring system to compare whether the working point is around a surge and stall alarm zone of a running curve to timely judge and early warn. The real-time monitoring and preventing method can timely find safety hazards in running of the fan, hysteresis quality of monitoring and prevention is eliminated, stability of burning work conditions of a boiler is effectively guaranteed, and a machine set is led to run safely and stably.

A transflective liquid crystal display with uniform cell gap configuration throughout the transmissive and the reflective display region is invented. Mutually complementary common electrode pattern and reflector pattern or mutually complementary ITO pixel electrode pattern and reflector pattern produce an electric field in the transmissive display region that has a uniform longitudinal field and an electric field in the reflective display region that is a fringing field. An initially vertically aligned negative dielectric anisotropic nematic liquid crystal material between the electrodes forms a smaller tilt angle with respect to the substrate normal in the reflective display region while a larger tilt angle with respect to the substrate normal in the transmissive display region. Consequently, the ambient incident light experiences smaller phase retardation in the reflective display region while the light from the backlight source experiences larger phase retardation. Since the ambient light passes through the reflective display region twice while the light from the backlight source passes through the transmissive display region only once, by properly designing the electrodes and the reflector width, the light from both ambient light source and backlight source will experience almost the same phase retardation in both reflective and transmissive display regions. As a result, the electro-optical performance curves of both transmissive display mode and reflective display mode overlap.

A method for improving performance tuning speed of a distributed system belongs to the technical category of performance optimization of a distributed computer system. The method is characterized by comprising the steps of quantizing the parameters with respective numeric area as a uniform parameter set in the distributed system including a web page server, an application programme server and a database server and composed of three-layer servers, obtaining the parameter set through uniform sampling, training by using a three-layer neural network model which comprises two hidden layers and of which each node is a logistic function, then repeatedly sampling, testing new parameters in the neural network to obtain rough response time and rough throughput rate, determining the sequencing performance curve and noise grade of the neural network based on the requirements of the system performance optimization, and finally obtaining the parameters of a regression function according to the set relative performance requirements so as to obtain the desired optimal parametric solution. The invention has the advantages that the invention improves the system performance and synchronously reduces test time.