133results about How to "Reduce evaluation costs" patented technology

Improved query optimizer using implied predicates. The system facilitates allowing a query optimizing component to introduce into a query, extra predicates that facilitate the following: render the same results as the original query; are used as dictated by rules passed to the optimizing component—these rules specify whether the new predicate is an equivalence (that will substitute the old predicate) or an implication (in which the old predicate is preserved); are considered as cost-based alternatives, and discarded if not useful; are tied to index utilization; and can consider both standard and multi-valued indices.

The invention discloses a method and a device for evaluating the voice quality of a voice over Internet protocol (VOIP). The method comprises the following steps of: monitoring and capturing a data packet in real time; judging whether the monitored and captured data packet is a preset data packet of a VOIP client or not, and arranging the monitored and captured data packet into a data packet queue if the monitored and captured data packet is the preset data packet of the VOIP client; performing voice stream processing on the data packet arranged into the data packet queue, and acquiring a voice data packet; and performing voice quality evaluation coefficient calculation according to the acquired voice data packet, and evaluating the voice quality. By the method and the device, voice quality evaluation reliability can be improved.

The invention discloses a capacitive voltage transformer error state online monitoring method and a system thereof. The method comprises the steps of through synchronous triggering of a synchronous signal unit, acquiring and calibrating measurement data of an operation three-phase capacitive voltage transformer, establishing a threshold which represents a statistics characteristic parameter of thecapacitive voltage transformer error state and a statistics characteristic quantity of a standard normal operation state by means of a principal component analysis method; acquiring measurement dataof the three-phase capacitive voltage transformer in the operation state, according to a statistics characteristic parameter, representing a statistics characteristic quantity of the three-phase capacitive voltage transformer error state by means of an adaptive principal component analysis method, and comparing the statistics characteristic quantity with a statistics threshold for determining whether the error state of the capacitive voltage transformer is normal; and when the statistics characteristic quantity of the measured data exceeds the statistics threshold, performing diagnosis on theerror abnormity of the capacitive voltage transformer. The capacitive voltage transformer error state online monitoring method and the system thereof can realize real-time online evaluation on the error state of the capacitive voltage transformer.

A network station server performance test system based on TPC-w primary standard applies a customer set / server system structure to utilize multiple customer sets to simulate multiple remote browsing customers and strictly obey the statistic property for user access to access it in stipulated test time and test its performance expressed under three test modes (WIPS, WIPSb an WIPSo), namely, the mean number for web-page operation in each second and mean response time of the server to users.

The invention discloses an on-line monitoring method and system for an error state of an electronic voltage transformer. The method comprises: (1), collecting measurement data of a three-phase electronic voltage transformer in calibrated operation, establishing a residual model of the measurement data by using a principal component analysis method, and calculating a control limit of a measurement data statistical feature quantity under the residual model; (2), collecting measurement data of the three-phase electronic transformer in an operating state, calculating a statistical feature quantity based on the residual model established in step (1), and carrying out comparison of the statistical feature quantity with a statistical control limit to determine whether an error state of the electronic transformer is abnormal; and (3), diagnosing error abnormity of the electronic transformer by using a variable contribution rate method when the statistical feature quantity of the measurement data exceeds the statistical control limit. With the on-line monitoring method and system, the traditional periodic etalon detection way can be avoided; and real-time on-line monitoring of the error state of the electronic voltage transformer is realized.

The invention provides a method and device for assessing the capacity of a distributed cluster processing a specified service. The method comprises the following steps that performance indexes for assessing the capacity of the distributed cluster processing the specified service and resource parameters, constraining the performance indexes, of the distributed cluster are determined; performance index data and resource parameter data are acquired; a relation model of the performance indexes and the resource parameters is determined by adopting a machine learning algorithm by means of the performance index data and the resource parameter data; and the capacity of the distributed cluster processing the specified service is determined according to the relation model. According to the technicalscheme, the influences possibly caused on the services operating on line can be avoided, the corresponding service processing capacity of the distributed cluster operating on line can be assessed onthe basis of the practical service data, the condition that the service serviceability of the distributed cluster operating on line is influenced can be avoided, and the advantage of reducing the assessment cost is achieved.

The invention provides a method and system for coverage performance evaluation of an antenna. The method comprises the following steps that: sweep frequency data of a testing sampling point related to a target evaluation antenna are obtained; the testing sampling point is mapped to an antenna evaluation coordinate system according to the sweep frequency data; a sample statistic unit of the antenna evaluation coordinate system is obtained, wherein the sample statistic unit contains one or more testing sampling points; actual measurement signal field intensity and theoretical signal field intensity of the target evaluation antenna in the sample statistic unit are obtained; according to the actual measurement signal field intensity and the theoretical signal field intensity of the target evaluation antenna in the sample statistic unit, a preset antenna coverage performance parameter of the target evaluation antenna is evaluated. According to the invention, under the circumstances that the running of the existing network is not influenced, the coverage performance of the antenna can be evaluated accurately and rapidly.

The invention provides a method for determining the service life of a hot carrier injection (HCI) device. The method comprises the following steps of: measuring Isub-Vg curves and Id-Vg curves of a device under three different Vds; finding out an Isubmax value, a Vg value under the Isubmax value and an Id value under the Vg value respectively for each group of the Isub-Vg curve and the Id-Vg curve; drawing an Isubmax-Vd relational graph and an Id-Vd relational graph by using the values obtained in the former step; fitting the Isubmax-Vd relational graph and the Id-Vd relational graph respectively by using a power function to obtain a fitting formula; and deducting a group of Isubmax values and Id values under a Vd working voltage condition according to the fitting formula, deducting three groups of Isubmax values and Id values under an HCI stress test condition according to the fitting formula, deducting the device degeneration performance obtained by the HCI stress test, and deducting the final service life of the device through a service life model. According to the method, the HCI service life of a metal oxide semiconductor (MOS) device is estimated by using a small number of samples, and the service life of the device under any working voltage can be obtained, so that the estimation cost is reduced, and the estimation flexibility is improved.

The invention discloses a trusted sensing cloud data collection and evaluation method that is used for trust evaluation on a node and a mobile base station in a network during a sensing cloud data collection process. According to the method, a working area of a mobile base station is determined, wherein the area is determined by the number M of mobile base stations; the logical relationship of the system is determined as follows: sending data to a target node Sj by a subjective node Si; and when the target node Sj is not within the scope of the subjective node Si, data exchange needs to be forwarded by recommending a node; models for evaluating trust degrees of a node and a mobile base station in the network is established, wherein the models consist of a direct trust model Tdir, an indirect trust model Tindir and a functional trust model Tfunct; and then according to evaluation parameters Tdir, Tindir, and Tfunct obtained by calculation at the last step, a confidence level of sensing cloud data collection is determined. According to the invention, malicious attacks in the data collection process can be resisted effectively and the reliability of sensing cloud system data collection can be improved; and usability of the data can be ensured.

This invention discloses a performance combined test system of a memory server including a test management module and a load generative module set on a customer computer, in which, the first is responsible for setting test parameters to send test order to the load generation module and collects its test result data and calculates and arranges the result data to output them, controlling the whole process of the test. The latter sets up I / O access flow, transfers I / O request messages to the storage server and receives its respond information. This invention uses multiple customer computers to simulate multiple users and accesses the storage server within stimulated time to test its performance expressed under different load conditions.

The invention discloses a system and a method for issuing interactive network advertisements. The system comprises a center server and a plurality of self-service terminals, wherein the self-service terminals are connected with the center server through a network. The method comprises the following steps that: (a) the center server stores a radio frequency (RF) card number or a mobile phone number of a user and merchandise information to be released; (b) the center server releases the information periodically to each self-service terminal; (c) the user activates the RF card number or the mobile phone number, and the center server transmits real-time information to each self-service terminal; (d) the user uses the activated RF card number or mobile phone number to log in a local self-service terminal, selectively releases the information and finishes the self-service operation; and (e) the local self-service terminal feeds user data back to the center server through the network. The system and the method for issuing the interactive network advertisements can provide the issuing of the interactive network advertisements, release the information timely and acquire the user feedback data.

The invention discloses a satellite-borne embedded data communication fault dynamic injection system and method based on a digital virtual technology. The satellite-borne embedded data communication fault dynamic injection system comprises a satellite house-keeping simulating unit, an underlying hardware communication interface virtual unit and a fault injection unit, wherein the satellite house-keeping simulating unit is used for dynamically generating a storage space for a physical quantity in an actual communication process on a host machine based on a given communication transmission protocol; the underlying hardware communication interface virtual unit is used for performing byte stream conversion on the physical quantity according to a given communication packaging protocol, and transmitting obtained information byte streams to an external control system according to a correct reading-writing time sequence; the fault injection unit can perform reading-writing operation on the information byte streams input by the underlying hardware communication interface virtual unit by sharing memory with the external control system. Software implementation is performed on an underlying communication hardware interface through the digital virtual technology, so that various hardware fault responses can be overlapped on communication data at extremely low cost, the evaluation time is saved, and the evaluation cost is lowered.

The invention discloses a battery cycle performance accelerating and evaluating method. The battery cycle performance accelerating and evaluating method includes: step 1, charging a battery till the battery is fully charged; step 2, discharging the battery in real time; step 3, increasing the discharging voltage of the battery to a preset discharging voltage when a first preset charge state is reached during discharging, returning to the step 1 when the battery voltage is discharged to a second preset charge state, and repeating in cycles and looping for times preset by a user. By the aid of the battery cycle performance accelerating and evaluating method, the battery cycle performance can be conveniently and reliably evaluated, cycle time can be shortened, evaluation cost for the battery cycle performance is reduced, producing cost of the battery is lowered, market application prospect of products manufactured by battery manufacturers is benefited, and great production practical significance is provided.

The invention discloses a photo-etching alignment precision measurement accuracy evaluation method. According to the method, a series of matrix design experiments are performed based on alignment precision compensation values of machines in a photo-etching exposure process, measurement results of an alignment precision measurement method to be evaluated and preset exposed alignment precision compensation values are compared, so that a correlation result is acquired, and the accuracy of the alignment precision measurement method is evaluated according to the fact whether the correlation resultis located in a standard interval or not. The accuracy of the photo-etching alignment precision measurement method can be accurately, simply and rapidly evaluated.

The system includes testing management module set at client end computer, load generation module and SMTP mail receiving process module. The testing management module controls full testing procedure, taking charges of setting test parameters, sending testing commands to load generation module and SMTP mail receiving process module, and collecting tested data from the said two modules and outputting tested data after statistical treatment. Load generation module creates communication flows of SMTP and POP3, transfers SMTP message to mail server and fetches mail of local mailbox from mail server under control of testing management module. SMTP mail receiving process module simulates SMTP service. Linux multi-threads programming technique, communication technique between processes and networking programming technique are adopted in the invention.

The present invention relates to electromigration testing and evaluation methods and apparatus for a device under test with an interconnect structure. The method comprises forcing the occurrence of a step resistance-increase of the interconnect structure due to electromigration in the first layer and subsequently subjecting the interconnect structure to at least three respective predetermined stress conditions while concurrently measuring a test quantity indicative of an electrical resistance of the interconnect structure. The method allows performing an electromigration test in much shorter time than known electromigration testing methods, without loss of information or accuracy. It is therefore possible to accelerate the optimization of the interconnect manufacturing process so that the conductor electromigration kinetics remains compatible with a required product lifetime. This allows reducing the time and cost for electromigration testing and thus fabricating integrated-circuit devices with a lower overall cost.

The invention provides a method for shortening the time of testing the cycle life of lithium ion batteries. According to the method, N batteries are selected for testing of the cycle life, and the cycle life of each battery is tested in different SOC (charged) states. In this way, the testing time for the cycle life of lithium ion batteries is greatly shortened, the testing cost is reduced, the introduction time for new products and new technologies is accelerated, and the product competitiveness for battery manufacturers and relevant material manufacturers is improved. According to the method, if 4<=N<=10, the testing time can be greatly reduced, the testing accuracy is high, and not too many testing devices will be occupied; if N=4, the testing time is 50%-70% reduced; if N=6, the testing time is 65%-75% reduced; and if N=10, the testing time is 70%-80% reduced. A difference between a capacity result obtained by the method and a capacity result of a conventional method is within 5%, and a difference between a thickness result of the method and a thickness result of the conventional method is within 8%. Therefore, it is proved that the method of the invention is greatly consistent with the conventional method.

The invention provides a method for quickly evaluating the cycle performance of a high-nickel anode material for a lithium-ion battery, comprising: providing a high-nickel anode material to be testedand a standard high-nickel anode material meeting preset cycle performance requirements, and assembling the materials respectively with the same cathode and diaphragm by the same method to obtain a standard battery and a battery to be tested; performing pre-charge aging and capacity grading on the standard battery and the battery to be tested under the same condition, and charging and dischargingthe batteries by 0.01C to 1C for 1 to 3 cycles on a battery detection system; collecting charge and discharge capacity (Q) and voltage (V) data, and drawing dQ / dV-V curves of the standard battery andthe battery to be tested; extracting H2 to H3 peaks of a voltage interval 4.0 to 4.2V according to the dQ / dV-V curves, and judging the cycle performance of the standard battery and the battery to be tested according to the H2 to H3 peaks and the changes thereof.

The invention relates to a method for evaluating health status of a decommissioned lithium-ion battery. The method comprises the following steps of: measuring the high-frequency AC impedance (R1) andthe low-frequency AC impedance (R2) under the same state of charge of the battery to obtain the difference between the high-frequency AC impedance (R1) and the low-frequency AC impedance (R2); and comparing the difference between the high-frequency AC impedance (R1) and the low-frequency AC impedance (R2) with the relationship between the difference between the high frequency AC impedance and thelow frequency AC impedance obtained from the calibration and the remaining life of the battery to determine the remaining life of the battery. According to the method for evaluating the health statusof the decommissioned lithium-ion battery, the complete AC impedance spectrum of the battery to be tested does not need to be collected, the time for evaluating the health status of the battery is significantly shortened, the evaluating efficiency is improved, and the evaluating cost is reduced.

The invention discloses a mobile network voice quality estimating method and device and relates to the technical field of mobile communication. The problem that a voice estimation result which reflects true feelings of a random user all over the network can be not obtained with low cost in the prior art is solved. The method includes the following steps that data which are relevant to a voice service and recorded in all devices in the mobile network are obtained; a property set is set up according to all properties in the data and divided into a property sub-set of an access process, a property sub-set of a maintaining process and a property sub-set of a complete process, and values of all the properties in the property set are zero; a data set relevant to a designated incident of a designated user in the data is obtained and corresponding properties in the property set are valuated according to property values of all the properties in the data set and a single-user single-event set is formed; all the sub-sets are calculated respectively and a quality estimation value of the access process, a quality estimation value of the maintaining process and a quality estimation value of the complete process are obtained; according to all the quality estimation values, a mobile network voice quality estimation result is obtained.

The invention provides a photovoltaic resource assessment optimization method and system based on historical meteorological data. The photovoltaic resource assessment optimization method comprises the following steps: 1) acquiring the historical meteorological data on a national scale, and computing and archiving the data and converting the form of the data into a data form satisfying the requirement of mapping so as to provide the data source for the whole mapping function; 2) selecting an area on a satellite map, taking the longitude and the latitude of the coordinate point of a diagonal point within the selected area range as the parameters, and then calling a mapping interface in a background service program; 3) using a mapping interface function for background service to inquire the longitude, the latitude and the total irradiance data required by mapping of the selected area, and using the related command of an NCL (The NCAR Command Language) mapping tool to generate a resource distribution map; and 4) loading the resource distribution map, superposing the resource distribution map above the map in a semi-transparent mode, and checking the resource distribution situation by means of combination of the map. The photovoltaic resource assessment optimization method and system based on historical meteorological data can provide a creative assessment scheme for a user, and can greatly improve the efficiency of assessment, and can reduce the assessment time and the assessment cost.

The invention provides a WLAN (wireless local area network) wireless signal coverage quality evaluation method and a WLAN wireless signal coverage quality evaluation device. The method comprises the following steps that terminal signal parameters reported by a plurality of terminals connected to an AP (access point) in a first preset time period is obtained, and the AP emission power of the AP is obtained, wherein the terminal signal parameter comprises a terminal physical address and the uplink signal intensity; the terminal emission power of the terminal is obtained according to a terminal physical address, the downlink signal intensity of signals sent by the AP and received by each terminal is calculated according to the uplink signal intensity of the terminal, the AP emission power and the terminal emitting power, and the coverage percentage of terminals with the downlink signal intensity being greater than a preset average value accounting for the total number of the terminals is calculated in the first preset time period; whether the coverage percentage is smaller than preset coverage percentage or not is judged, and if so, the weak coverage existence of the AP is judged. Through collecting the terminal signal parameters and the AP information, the coverage quality of wireless signals can be accurately judged without artificial test.

The invention discloses a magnetic resonance imaging simulating method for irrelevant movement in a myocardial microcirculation perfusion voxel, and belongs to the field of magnetic resonance imaging computer simulating. The method solves the problems that an in vivo experiment qualitative evaluation method cannot precisely quantize the detection effect, and a traditional simulating experiment quantitative evaluation method is large in evaluation difficulty, high in evaluation cost and long in evaluation period. The simulating method comprises the steps that firstly, a network avoidance algorithm, a boundary avoidance algorithm and a fluid branch constraint algorithm are utilized for building a virtual myocardial microcirculation network model; secondly, a blood perfusion model in a blood vessel and a water molecule diffusion movement model outside the blood vessel are built; thirdly, on the basis of the diffusion magnetic resonance imaging principle, an IVIM MRI mechanism is simulated, and a magnetic resonance fading signal is generated; fourthly, nonlinear fitting is performed on the fading signal, and the simulating detection result of the myocardial microcirculation perfusion model is obtained. The method can provide the reliable simulation quantitative evaluation conclusion.

The invention discloses a method and device for carrying out external radiation disturbance evaluation on vehicles and belongs to the automotive electronic electromagnetic compatibility technical field. The method includes the following steps that: a vehicle to be detected is set to a work mode according to which the vehicle to be detected is in a flameout state while electrical appliances work, first radiation data of antennas at each measurement point in a plurality of measurement points are measured through a spectrum analyzer; the vehicle to be detected is set to a work mode according to which the vehicle to be detected is in an idle state while the electrical appliances are switched off, and second radiation data of the antennas at each measurement point are measured through the spectrum analyzer; a detected vehicle is set to a work mode according to which the detected vehicle is in a flameout state while electrical appliances work, third radiation data of the antennas at each measurement point are measured through the spectrum analyzer; the detected vehicle is set to a work mode according to which the detected vehicle is in an idle state while the electrical appliances are turned off, and fourth third radiation data of the antennas at each measurement point are measured through the spectrum analyzer; and external radiation disturbance evaluation is performed on the vehicle to be detected according to the first radiation data, the second radiation data, the third radiation data and the fourth radiation data.

The invention discloses a capacitive voltage transformer error state online monitoring method and a system thereof. The method comprises the steps of through synchronous triggering of a synchronous signal unit, acquiring and calibrating measurement data of an operation three-phase capacitive voltage transformer, establishing a threshold which represents a statistics characteristic parameter of thecapacitive voltage transformer error state and a statistics characteristic quantity of a standard normal operation state by means of a principal component analysis method; acquiring measurement dataof the three-phase capacitive voltage transformer in the operation state, according to a statistics characteristic parameter, representing a statistics characteristic quantity of the three-phase capacitive voltage transformer error state by means of an adaptive principal component analysis method, and comparing the statistics characteristic quantity with a statistics threshold for determining whether the error state of the capacitive voltage transformer is normal; and when the statistics characteristic quantity of the measured data exceeds the statistics threshold, performing diagnosis on theerror abnormity of the capacitive voltage transformer. The capacitive voltage transformer error state online monitoring method and the system thereof can realize real-time online evaluation on the error state of the capacitive voltage transformer.

The embodiment of the invention discloses an enterprise risk control method, device and equipment based on big data credit investigation and a medium, the method is executed by an enterprise risk control system, and the enterprise risk control system comprises a credit investigation data standardization module, a credit investigation data indexing module, an enterprise admission module, an enterprise anti-fraud module and an internal credit scoring module. The method comprises the following steps: processing credit investigation data acquired by a plurality of data sources through a credit investigation data standardization module to determine a structured data item; processing the structured data item through a credit investigation data indexing module to form a credit investigation data index corresponding to the evaluated enterprise; automatically verifying the credit investigation data indexes corresponding to the evaluated enterprises through an enterprise admission module, and screening out the evaluated enterprises meeting admission requirements according to a verification result; and performing fraud risk evaluation on the evaluated enterprise meeting the admission requirements through a built-in model of the enterprise anti-fraud module, determining the fraud probability of the evaluated enterprise, and forming a fraud risk score of the evaluated enterprise.

The invention provides a state evaluation method of a synchronous phase modifier oil system. The method comprises steps of firstly, establishing a state evaluation index system of a synchronous phasemodifier oil system; carrying out qualitative division on the health state of the synchronous phase modulation oil system; carrying out normalization preprocessing on each evaluation index data; judging whether a normalized numerical value of an evaluation index is 1 or not, if so, determining that the evaluation result is a fault, and if not, solving the membership degree of each preprocessed evaluation index, constructing a fuzzy evaluation matrix and solving the weight of each evaluation index, and finally giving a state evaluation result of the oil system in combination with the fuzzy evaluation matrix and the weight. Interference of subjective factors is eliminated, evaluation cost is reduced, the health state of the oil system can be correctly evaluated so that potential faults of the oil system can be found as soon as possible, the service life of the phase modifier can be prolonged, and remarkable economic benefits are brought to users.

The invention discloses a processing capability evaluation method and device and relates to the field of communication. On the premise that evaluation cost is reduced, processing capability evaluation of a large-scale computer cluster is achieved. According to the specific scheme, operation parameters of a small-scale computer cluster during operation and application are collected, a performance deduction model is obtained according to the operation parameters, configuration information of the small-scale computer cluster and configuration information of the large-scale computer cluster are obtained, and the processing capability of the large-scale computer cluster is evaluated according to the configuration information of the small-scale computer cluster, the configuration information of the large-scale computer cluster and the performance deduction model to obtain the processing capability of the large-scale computer cluster. The method and device are used in the processing capability evaluation process of the large-scale computer cluster.

The invention provides a method for testing correctness of device model simulation results. The method comprises the following steps of: generating a circuit simulation netlist on the basis of a device model and a test demand; respectively carrying out simulation by adoption of comparative simulation software and to-be-tested simulation software on the basis of the circuit simulation netlist; and generating a simulation test result on the basis of the simulation result. The method for testing correctness of device model simulation results is an efficient and visual test method; according to the method, a most basic device model building circuit is simulated; and the method is compared with a gold analysis tool to generate a result report which is easy to check, so that simulation software engineers are helped to rapidly and conveniently check the result of supporting the device model by the simulation software so as to save the debugging cost, and circuit design engineers of design companies are helped to rapidly assess whether the support, for the device model, of new simulation software is consistent with the support, for the device model, of the existing simulation software or not so as to save the assessment cost.

The invention discloses a WLAN network terminal uplink interference evaluation method and a device. the method comprises the following steps: according to the preset report granularity, terminal signal parameters of a terminal and AP signal parameters of an adjacent AP are successively obtained; according to a channel of the adjacent AP, interchannel interference factors of the adjacent AP are obtained though calculation; according to uplink signal intensity of the terminal, uplink signal intensity of the adjacent AP and the interchannel interference factors, each first uplink signal to noise ratio of the terminal is obtained through calculation; according to the each first uplink signal to noise ratio of the terminal, interference percentage of the frequency that the first uplink signal to noise ratio is less than the preset uplink signal to noise ratio in the report frequency is calculated; and whether the interference percentage is greater than the preset interference percentage is determined; and if the interference percentage is greater than the preset interference percentage, it is determined that there is interference during the business process of the terminal with the use of a WLAN network. The uplink signal to noise ratio is directly calculated through present acquisition parameters. Thus, accuracy of evaluating the uplink interference situation of WLAN network users is raised.