111 results about "Power index" patented technology

A method and apparatus for testing a football helmet utilizes a weighted pendulum arm to impart an impact force upon the helmet. Linear head acceleration and rotational head acceleration caused by the impact force is measured and a Head Impact Power Index is computed and used as a standard to judge the ability and effectiveness of the football helmet in preventing injury to a football player.

A system and method for statistical design of an ultrasound probe and imager system, and an associated graphical user interface for selecting input parameters to be used in an ultrasound simulation. The process and computer code allow the performance of a probe and imager combination to be specified and jointly optimized in image quality terms. The designs produced optimize both the image quality and other CTQ (critical to quality) parameters, such as the distribution of regulatory power indices and mechanical index. These CTQs indirectly affect image quality through their effect on patient dose. The Transducer Design Advisor incorporates a graphical user interface for facilitating selection of a parameter set to be used in the simulation. The user selects a desired parameter set by navigating across and interacting with a succession of windows. The user specifies various geometric characteristics of the transducer and how the user wants to simulate the imager system. Finally, the user specifies weights for the various CTQs at different depths. Based on these inputs, the Transducer Design Advisor creates the files needed by the ultrasound simulator.

The invention relates to the communication field and discloses an authentication method, a network and a system of mobile ad hoc network, which ensures the realization of layer distribution type authentication scheme of cluster mobile ad hoc network; and the requirement on computer processed resources is rational, which can be realized in practical application environment. The invention adopts a group network structure of cluster mobile ad hoc network and advocates layer distribution identity authentication scheme; and the inter-cluster communication used an improved new threshold group signature protocol which improves the original threshold group signature method based on GQ and decreases power index calculation times, improves calculation parallelism and reduces the requirement on processed resources; at the time of initialization, a certificate and a sub key are issued by the system uniformly; cluster heads which have enough numbers of sub keys can jointly recover system keys, thereby carrying out the group signature to issue certificates to new added nodes and using multi-leap serial communication for realizing united group signature.

The present invention discloses a switching regulator and a control circuit and a control method thereof. The control circuit of the switching regulator, which controls rectified power within a predetermined range, detects an input voltage and an input current to generate a voltage detection signal and a current detection signal respectively, and the voltage detection signal and the current detection signal are multiplied by one the other to generate a power index. The control circuit generates an error signal according to the power index and a reference signal. A low-pass-filter filters a high frequency band in the process. A control signal generation circuit of the control circuit generates a control signal according to the error signal. And a driver circuit of the control circuit generates an operation signal according to the control signal, for switching a power switch to convert the rectified power to an output voltage.

An electronic device includes a deviation value calculation unit which calculates a deviation value from the normal boundary of the relationship between a power index associated with the driving power and the measured rotational speed of the fan, a clogging detection unit which detects, based on the deviation value, clogging in an air duct through which the fan takes in air outside the case and sends it to the radiator, and a deviation value correction unit which corrects the deviation value in accordance with aging of performance of the fan to compensate for deterioration of the clogging detection capability of the clogging detection unit caused by the aging.

The invention relates to a ballastless track designing, checking and calculating system based on a space detail solid model. A method includes the following steps that a finite element model of a steel rail, a ballastless track system and a lower portion foundation is built; according to the model, the bending moment and the internal force of each structural layer of the track system under the action of loads are calculated; according to the bending moment and the internal force obtained through calculation, a detail checking and calculating model of a solid steel bar unit, a ballastless track system solid unit and the lower portion foundation is built; according to the checking and calculating model, the internal force, the stress and deformation conditions of the steel rail, the ballastless track system and the lower portion foundation under different loading conditions are checked and calculated, and stress of detail connecting steel bars is checked and calculated. The designed models can extract the bending moment and the axial force, under the action of the loads, of the track system, and a power evaluation model considers a detailed structure mode of a vehicle and the lower portion, uses self-compiled programs for completing wheeltrack contact and achieves extraction of power indexes of the vehicle in high-speed running.

The invention provides a detection method of a radio frequency path and a mobile terminal. The method comprises the following steps: detecting power index of the radio frequency path during transmitting data; determining whether the power index meets a preset condition that the path is abnormal; determining that the radio frequency path is abnormal if the power index meets the preset condition that the path is abnormal; and outputting a prompt message associated with the the radio frequency path abnormality. Through the method, the prompt message that the radio frequency path is abnormal can be output immediately when the radio frequency path is abnormal so as to provide feedback that the radio frequency path is abnormal to the user in time.

The invention provides a simple support beam damage and moving force simultaneous identification method under a moving load. The simple support beam damage and moving force simultaneous identification method under the moving load includes steps: measuring accelerated speed power responses of a structure in damage status, and using the accelerated speed responses of the structure as power indexes of structure damage and moving force identification; using Chebyshev polynomials to represent the unknown moving load according to a structure numerical model, and using a beam element shape function concept to equalize the moving load to unit node force, and respectively figuring out sensitivity matrixes of the structure accelerated speed responses for damage and moving force parameters; using a responsive difference between each measured structure accelerated speed response and a finite element accelerated speed response which is obtaining through calculation as an objective function by using a sensitivity analysis result in combination, and using a first order Taylor expansion identification equation to perform iteration step by step and simultaneously identify damage and moving force of a simple support beam. The simple support beam damage and moving force simultaneous identification method under the moving load can achieve simultaneous identification of the damage and the moving force only through a small quantity of the measured accelerated speed responses of the structure, and is strong in practicability.

The invention discloses an anisotropy evaluation method for rock structural surface shear strength. The method comprises the following steps that: S1: obtaining the rock structural surface outline curve models of different shearing directions; S2: on the basis of the one-side PSD (Power Spectral Density)* of the rock structural surface, calculating the comprehensive power index Pf of each frequency ingredient which forms the rock structural surface for the roughness contribution of the rock structural surface; S3: calculating a corrected gradient mean square root Z2<*>; S4: on the basis of thecomprehensive power index Pf and the gradient mean square root Z2<*>, calculating the roughness parameter PZ of the rock structural surface; and S5: calculating the shear strength in different sheardirections of the rock structural surface. By use of the method, on the basis of the power spectral density, the contribution of each frequency ingredient which forms the rock structural surface for the roughness of the rock structural surface and the anisotropy characteristic of the roughness of the rock structural surface are analyzed, and therefore, the anisotropy of the shear strength of the rock structural surface can be more comprehensively subjected to quantitative evaluation.

A method for power control of a wireless communication device (2) comprises the steps of defining the transmission power of at least one transmitter (12) of the wireless communication device (2), defining a power index (POW_t) on the basis of the transmission power of the transmitter (12), and selecting at least one limit value. The power index (POW_t) is compared with the limit value and, on the basis of the comparison, it is deduced whether there is a need to adjust the transmission power of the wireless communication device (2). The transmission power may then be adjusted accordingly. A related wireless communication device and a system shown.

The invention provides a method and a device for measuring an LTE terminal in an idle state, and belongs to the field of mobile communication. The method for measuring an LTE terminal in an idle state comprises the following steps: acquiring the current moving speed grade of an LTE terminal in an idle state; acquiring the current battery remaining power index R of the LTE terminal; and determining the measurement cycle of the LTE terminal for an intra-frequency cell, an inter-system cell and/or an inter-frequency cell according to the acquired moving speed grade and the battery remaining power index R. Through the technical scheme of the invention, the influence of inter-frequency and inter-system measurement on the power consumption of the terminal in an idle state can be reduced under the premise of ensuring the re-selection measurement performance.

The invention discloses a photovoltaic power station power prediction system based on a cloud platform, which comprises a cloud platform, a photovoltaic power station client, a power grid dispatching center and a meteorological data module, wherein the cloud platform is used for calculating a power generation power prediction value of the photovoltaic power station according to the state information of the photovoltaic power station; the photovoltaic power station client is in network connection with the cloud platform and the power grid dispatching center for monitoring and providing the state information of the photovoltaic power station to the cloud platform and adjusting the actual power generation power of the photovoltaic power station according to a power generation power index value of the power grid dispatching center; the power grid dispatching center is in network connection with the cloud platform and the photovoltaic power station client for determining the a power generation power index value of the photovoltaic power station according to the power generation power prediction value of the photovoltaic power station calculated by the cloud platform and sending the power generation power index value to the photovoltaic power station client; and the meteorological data module is in network connection with the cloud platform for providing weather forecast data for the cloud platform. The system of the invention has the advantages of low construction and maintenance cost, convenient maintenance and high prediction precision and the like.

The invention discloses an antenna module which comprises an antenna main body, an adjustable matching circuit, a power detector and a control unit; the antenna main body is provided with a signal feed-in point; the adjustable matching circuit is electrically connected with the antenna main body and a power amplifier, is used for providing a load resistor, is provided with adjustable impedance matching assemblies which are connected mutually, and is electrically connected to the signal feed-in point; the power detector is electrically connected with the adjustable matching circuit and the power amplifier, and is used for detecting a power index; and the control unit is electrically connected with the adjustable matching circuit and the power detector, and is used for reading an output power index and a signal intensity index, generates a control signal to the adjustable matching circuit according to the operation of the output power index and the signal intensity index, so as to change the load resistor continuously to reach impedance matching.

A toner for electrophotography is disclosed. The toner comprises a binder resin and a colorant and a wax in amount of 0.5 to 8 percent by weight, and adhesion power index of wax particles to toner particles is between 0.7 and 2.2. The toner improves the durability of the developer material and a photoreceptor, minimizes image smear at high temperature and humidity, and exhibits excellent fixation as well as offsetting resistance.

The invention discloses a nonlinear Granger causality detection method based on a kernel recursion maximum cross-correlation entropy algorithm. The method is based on a traditional Granger causality detection method. A kernel recursion maximum cross-correlation entropy algorithm is adopted to establish a nonlinear regression model. A nonlinear regression error is utilized to calculate a causal index. By acquiring a causal relationship between two time sequences through a causal criterion, and significance testing is carried out on the causal index and a resolving power index. According to themethod, the nonlinear causal relationship can be correctly detected, and the resolution capability is higher. Therefore, the nonlinear Granger causality detection method based on the kernel recursionmaximum cross-correlation entropy algorithm is easier to popularize and use in practical application.

The invention provides an automatic adjusting method and system for ultrasonic imaging equipment. The method comprises the steps that the penetrating power index, resolving power index and contrast ratio index corresponding to each scanning frequency band are automatically traversed under the current scanning depth; according to the obtained penetrating power index, resolving power index and contrast ratio index, the image quality index corresponding to the current scanning frequency band is obtained; a scanning frequency band with the maximum image quality index is obtained as the optimal scanning frequency band; the ultrasonic imaging equipment is adjusted to be scanned under the current optimal scanning frequency band. According to the automatic adjusting method and system for the ultrasonic imaging equipment, on the basis of the image quality corresponding to each scanning frequency band, the current scanning frequency band is automatically adjusted, working procedures are reduced, clinical diagnosis convenience and using frequency of the ultrasonic imaging equipment are improved, and the ultrasonic diagnosis image quality is improved.

The invention provides a control method and a system of electricity theft detection used for a medium and low voltage mixed power distribution network. The method includes: in the selected medium and low voltage mixed power distribution network, a set M including n to-be-detected nodes is set, a to-be-detected node Mi is selected and measured, power index values of the medium and low voltage mixed power distribution network are obtained, the weight of a measuring value is set, state estimation calculation of the medium and low voltage mixed power distribution network is conducted, and an active load estimation value of Mi is obtained; the active load estimation value of Mi and the practical measuring value are compared, if an absolute value obtained by subtracting the practical measuring value from the active load estimation value is greater than a preset detection threshold, it is determined that Mi has electricity theft behaviors; and another Mi is selected from the set M, the above operation process is repeated, and the process is stopped until the determination of electricity theft behaviors of all Mis in the set M is accomplished. According to the method and the system, problems that the analysis results of electricity theft are inaccurate and users with electricity theft cannot be discovered via the prompts of a meter device or regular manual inspection at the spot are solved.

The application provides a rating method and device and an electronic terminal. The method and the device are applied to the electronic terminal. Rating power indexes set for different users are prestored in the electronic terminal. The method comprises the following steps: acquiring personal scores of a plurality of users specific to a target to be evaluated, and calculating rating proportions ofthe users according to the rating power index of each user in the plurality of users; and calculating the comprehensive score of the target to be evaluated according to the rating proportion of eachuser in the plurality of users and the personal scores of the users for the target to be evaluated. Thus, the proportion of the personal score of each use can be matched with the rating capabilities of the users during calculation of the comprehensive score of the target to be evaluated, so that the accuracy of the objective evaluation result is increased.

A method for determining the hemodynamic state of a subject. The method comprises (a) determining the cardiac power index (Cpi) and systemic vascular resistance index (SVRi) values of a plurality of patients who have been diagnosed as having a specified hemodynamic state; (b) determining the range of Cpi and SVRi paired values corresponding to each of the hemodynamic states; (c) determining the Cpi and SVRi paired value of the subject; (d) comparing the Cpi and SVRi paired value of the subject to the ranges of Cpi and SVRi paired values determined in step (b); and (e) determining the range of Cpi and SVRi paired values which is most similar to the Cpi and SVRi paired value of the subject. The hemodynamic state which corresponds to the range indicates the hemodynamic state of the subject.

The invention discloses a power distribution network big data zoning processing method based on a Spark calculation engine. According to a power supply cell, mass load data is subjected to statisticalanalysis, and a power index with a practical value for power distribution network planning management is extracted. The method comprises the following steps that: S1: building a power distribution network big data processing platform, and carrying out city load analysis by taking a power utilization information collection system and a PMS PMS(Production Management System) as a data source; S2: importing data in the data source into Spark to serve as RDD (Resilient Distributed Datasets), and preprocessing the city load data in the RDD; S3: according to a power distribution transformer coordinate in the city load data, distinguishing the cell for the power distribution transformer; and S4:according to S2 and S3, calculating the city load index.