73 results about "Diversity factor" patented technology

The invention provides a keyword grouping method and a keyword grouping system. The keyword grouping method comprises: A, based on the attribute of the keywords, keywords in a current promoted account are classified through a preset keyword classification module, and the weight of each key word is ensured; B, based on the semantic matched degree between the keywords and originality, keywords with the semantic matched degree satisfying requirements of a preset matched degree between the keywords and the originality in the current promoted account are selected from the keywords in each category as seed words; and C, based on the weight of each keyword, surplus keywords in the current promoted account are clustered with the seed words in each category as cores to get a grouping result of the keywords. Clustering is that the keywords are clustered in a category satisfying requirements of a preset diversity factor by calculating a diversity factor between the keywords and the seed words. The keyword grouping method and the keyword grouping system improve accuracy of matched relations between the keywords and the originality.

The invention discloses an online monitoring and performance assessing method for primary frequency modulation of a thermal generator set. The method divides grid frequency changes into invalid disturbance, valid disturbance, large frequency disturbance and small frequency disturbance, wherein the large frequency disturbance and the small frequency disturbance are contained in the valid disturbance. Specific performance indexes of response time, stabilization time, diversity factors of set rotating speed and the like of the primary frequency modulation of the set are quantitatively assessed, the contributed electric quantity and the correct operation rate of the primary frequency modulation under the small disturbance of the set and the diversity factors of the set rotating speed under the large disturbance of the set can be effectively calculated, and an assessing method for the performance of the primary frequency modulation of the set is further provided. The online monitoring and performance assessing method for the primary frequency modulation of the thermal generator set has the advantages that calculation and monitoring can be carried out on the operation performance of the primary frequency modulation of the set in a long period of time, the comprehensive index of the primary frequency modulation of the set is further calculated, an assessing method is quantified, and the performance of the primary frequency modulation of sets in a network can be comprehensively learned by province professionals.

The method includes steps: according to certain condition, selecting a piece of surface from a 3D object; unbending and scaling the said piece of surface, and selecting the piece with less diversity factor between new and old textures to cover sample drawing; finally, carrying out segmenting operation for repeated area by using segmentation technique to make textures between new pasted piece and original piece be combined in most fit. Features are: simple algorithm, quick speed and easy of implementation.

The invention relates to an evaluation method for describing the compressibility of a shale reservoir. The evaluation method comprises the following steps that material contents including a well-site design report of a well to be evaluated, well-logging materials and well-measuring materials of the well to be evaluated are collected; according to the collected materials, the shale reservoir and the vertical depth H of the middle of the shale reservoir are determined, the fluid pressure gradient (FPG) of a stratum pore of the shale reservoir is determined, and the density (DEN) of stratum rock overlaying the shale reservoir is obtained; according to the FPG and DEN, the largest horizontal crustal stress Kimax and the smallest horizontal crustal stress Kimin of the shale reservoir are calculated; and the diversity factor delta Ki of the horizontal crustal stress of the shale reservoir is calculated, the compressibility of the shale reservoir is evaluated, and an evaluation result is output. The diversity factor delta Ki of the horizontal crustal stress of the shale reservoir is calculated through parameters of the FPG, the DEN and the like, and the compressibility of the shale reservoir is evaluated according to the delta Ki. The evaluation method is applied in more than 300 wells among shale gas wells in areas such as the middle Yangtze area, the Jiannan gas-field and the like, and the verification coincidence rate of the staged fracturing effect is 97.1%.

The invention relates to a method and system for adjusting local color of an image and belongs to the technical field of image processing. The method comprises the following steps: firstly, obtaining a to-be-adjusted color and an influence scope of color adjustment; calculating a diversity factor between a pixel point color of the color in the influence scope and the to-be-adjusted color; and calculating the adjustable amplitude of the pixel point color in the influence scope according to the influence scope and the diversity factor, and adjusting the local color of the image in the scope of the adjustable amplitude. According to the method provided by the invention, the to-be-adjusted color and the scope can be appointed by a user; the adjustable color is random, so that the user more clearly knows the adjusted color; and the adjusting scope can be set, so that the adjustment is more accurate.

The invention discloses a space object detection and tracking method based on a spaceborne image sequence, and the method comprises the following steps: (1), carrying out the background estimation ofa space-based image sequence through employing a two-dimensional minimum mean square filter, and taking an obtained residual error image as an initial background inhibition image; (2), generating a dynamic threshold value through the combination of local diversity factor measurement and morphological cap operation, wherein the dynamic threshold value is used for filtering the residual error background clutter again and enhancing a target; (3), employing a connected domain segmentation method, and filtering an inherent noise region of a detector; (4), removing isolated noise points through themotion characteristics of a space target and a multi-frame correlated method. A processing result of the method for a real space-based image sequence indicates that the method can improve the signal to clutter ratio by about 45 times, can achieve the effective detection of a weak and small target, is good in performance, and provides technological support for the space-based optical remote sensing.

The invention discloses a method and device for obtaining an image diversity factor result. The method includes the steps: obtaining a color diversity factor value and a structure diversity factor value of pixels in each same position by comparing the color similarity and the structure similarity of pixels in the same position in a first image and a second image; obtaining offset of each pixel through calculation and according to the color diversity factor value and the structure diversity factor value, and calculating an offset consistence diversity factor value of any pixel according to the offset of each pixel; obtaining diversity factor value results of the two images according to the color diversity factor values, the structure diversity factor values and the offset consistence diversity factor values. According to the method device for obtaining the image diversity factor result, improvement of precision of the image difference detection results is achieved.

The invention discloses a primary frequency modulation online self-tuning controller and control system for a generator set and a method of the primary frequency modulation online self-tuning control system for the generator set, wherein the controller comprises a power network frequency deviation calculation module used for obtaining deviation between power network real-time operation frequency and power network reference frequency to obtain network frequency deviation, a frequency modulation compensation command function F(x) module used for calculating a primary frequency modulation load compensation command function F(x) of the generator set according to the network frequency deviation and set revolving speed diversity factors, and sending the primary frequency modulation load compensation command function F(x) of the generator set to a self-calibration algorithm control module and a command correction MUL module respectively, the self-calibration algorithm control module used for calculating a primary frequency modulation command correction coefficient and the command correction MUL module used for receiving the primary frequency modulation correction coefficient output by the self-calibration algorithm control module, and correcting the primary frequency modulation load compensation command function F(x) of the generator set to obtain a primary frequency modulation actual motion compensation command of the set, and finally sending the primary frequency modulation actual motion compensation command of the set to a set load control system.

The invention discloses a user partition preference calculation method and system based on the entropy method, and relates to the field of user partitions in live videos. The calculation method includes the steps that evaluation indexes are established in all partitions for all users; an initial matrix X is established according to the evaluation indexes of all the users; the optimum index X'zj of the j evaluation index of the z user is calculated in the initial matrix, and the contribution degree Pzj of the z user under the j evaluation index is calculated according to X'zj; the entropy ej of the j evaluation index is calculated according to Pzj; the diversity factor gj of the j evaluation index is calculated according to ej; the weight Wj of the j evaluation index is calculated according to gj; the preference scores of the users in all the partitions are calculated according to the weights of all the evaluation indexes. By means of the calculation method and system, the main partition types preferred by the users can be determined according to the preference scores of the users in different partitions.

The invention discloses a primary frequency modulation control system based on a frequency droop regulation method and a method thereof, and relates to the technical field of thermal power generator set primary frequency modulation. The system structure of the actual primary frequency modulation control system based on the frequency droop regulation method is provided. The new primary frequency modulation control system comprises three parts: a load coordinated control part, a basic control part and a machine set part. The load coordinated control part comprises an absolute value calculating unit, a frequency variation range judgment unit, a droop control load instruction calculating unit, a diversity factor load instruction calculating unit, a machine furnace load control unit and a droop characteristic reference frequency calculating unit. The primary frequency modulation control strategy with mutual matching of frequency droop regulation and a fixed reference frequency control method is adopted, and the frequency modulation dead band of the power generator set is set as zero so that system frequency can be rapidly stabilized through primary frequency modulation control and the phenomenon of double hump of frequency probability distribution caused by the frequency modulation dead band can be improved, and thus power grid frequency safety can be effectively guaranteed.

Hierarchical modulation technique (HMT) based on code cooperation protocol is adopted in radio communication network to transmit radio signal in cooperation. When transmitting data for associated terminal in cooperation, a mobile terminal multiplexes own and associated data symbols in low order modulation to high order modulation to carry out synergetic transmission. Modulating own data (or data of associated terminal) to bit position in high reliability (or low reliability), the mobile meets QoS requirements of different terminals by adjusting diversity factors of transmission reliability of bit in different positions in HMT. Making compromise between technical implementation and QoS requirement, the method obtains diversity gains in both of space and time so as to improve transmission performance of each terminal effectively. When network can implement synchronization of symbols accurately, the method obtains larger diversity gains by using scheme of combining space with time.

The invention provides a primary frequency modulation testing method, device and system of a gas and steam combined cycle unit. The method includes acquiring load commands of a gas turbine, setting diversity factor of an initial target revolving speed of the combined cycle unit; acquiring load to be adjusted in each turn of the gas turbine according to the diversity factor of the initial target revolving speed, the rated loads of the gas turbine and a steam engine; acquiring target setting values of diversity factor of the revolving speed according to the rated load of the gas turbine and the load to be adjusted in each turn of the gas turbine; applying a disturbance signal to the gas turbine; finely adjusting the target setting value of the diversity factor of the revolving speed of the gas turbine up and down so as to enable the diversity factor of the revolving speed of the combined cycle unit to meet the standard range. Expected load response loop of the steam engine is added to a frequency modulation load command loop of the gas turbine, so that reverse action of the load of the gas turbine is prevented. The primary frequency modulation testing method can optimize and adjust control parameters in real time, reverse action of the load of the gas turbine is avoided, and system is more stable and safer.

The invention relates to a method and apparatus sending alarm information and belongs to the technical field of electronics. The method comprises steps of detecting whether a bond target vehicle enters a non-work state, continuously shooting images of the interior of the target vehicle via an image shooting component, making a comparison between an image shot each time and an image shot before, and sending alarm information carrying an image currently shot to a preset first terminal when the currently-shot image and the image shot before meet a preset image diversity factor. Alarming effectiveness can be improved.

The invention relates to a one-step frequency modulation control method for a steam turbine, and aims to solve the problems in a rotating speed diversity factor of a current one-step frequency modulation function that if the rotating speed diversity factor is set to be smaller, the control and safety of the turbine can be influenced, and if the rotating speed diversity factor is set to be larger, the primary frequency modulation capacity of the turbine can be weakened, which is unfavorable for the stability of an electric grid. The control method comprises the following steps: step 1, regulating a system and calculating and monitoring deviation of rotating speed in real time; and step 2, performing one-step frequency modulation control according to a set rotating speed diversity factor. The one-step frequency modulation control method is applied to the field of the turbine regulation systems.

The invention relates to a method for determining the critical stable value of the grid connected thermal power generating unit primary frequency regulation rotating speed diversity factor. The thermal power generating unit is a condensing turbine set, and is based on a one-machine infinite system. The method is characterized by comprising the following steps of S1, establishing a steam volume effect mathematical model; S2, establishing a turbine rotor mathematical model; S3, establishing a hydraulic servo-motor mathematical model; S4, solving the critical stable value of the thermal power generating unit primary frequency regulation non-linear model rotating speed diversity factor; S4, solving the critical stable value of the thermal power generating unit primary frequency regulation linear model rotating speed diversity factor; and finally obtaining a rotating speed diversity factor Delta formula which makes the system be stable. According to the invention, the linear model rotating speed diversity factor critical stable value is employed to substitute the non-linear model rotating speed diversity factor critical stable value to serve as the set reference value of the grid connected thermal power generating unit primary frequency regulation rotating speed diversity factor, the safety of the grid connected thermal power generating unit is considered, and stable operation and primary frequency regulation capability of the rid connected thermal power generating unit are considered at the same time. At the same time, the method for determining the critical stable value of the grid connected thermal power generating unit primary frequency regulation rotating speed diversity factor is simple in implementation method and high in precision.

The invention discloses a device and method for detecting infrared spectral imaging system performance. The device comprises a control processor, an optical filter controller, a digital temperature controller, a target wheel controller, a multi-spectral target simulator and a multi-spectral optical collimator. The method comprises the first step of setting parameters, the second step of generating a triangular target, the third step of acquiring a target image, the fourth step of acquiring direction pointing recognition data, the fifth step of recording the direction pointing judged result, the sixth step of judging whether the times of direction pointing judging are enough or not, the seventh step of acquiring the true judgment probability, the eighth step of judging whether the times of setting a heat contrast ratio are enough or not, the ninth step of acquiring a triangular direction identification threshold value, the tenth step of judging whether the times of setting spatial frequency are enough or not, the eleventh step of judging whether the times of setting the spectrum diversity factor are enough or not, and the twelfth step of acquiring a two-dimension triangular direction identification threshold value curved face. The device and the method can comprehensively detect the comprehensive performance of an infrared spectral imaging system.

The invention provides an air-conditioning control method and device based on load prediction and a computer storage medium. The method includes the steps that a feature set corresponding to a to-be-predicted period is determined; operating features in the feature set are calculated based on the weight coefficient to obtain a load capacity base value, and the predicted load capacity of the to-be-predicted period is obtained according to the load capacity base value and diversity factor, the weight coefficient is obtained through nonlinear regression estimation of the feature set and load capacity corresponding to a historical period, and the diversity factor is obtained according to the load capacity of the historical period and the load capacity base value corresponding to the historicalperiod; and the control strategy corresponding to the predicted load capacity is determined, and control is conducted according to the control strategy.

The invention provides a marine radar image rainfall identification method based on the K parameter. The K parameter is defined as 100 times of the specific value of the zero intensity percentage to the echo intensity mean. Firstly the offline observation experiment is performed, data statistical analysis is performed and the detection threshold T is determined, and then same-frequency interference suppression processing is performed on the radar original image to be identified; then the shielding area zero intensity percentage and the echo intensity mean are calculated and the K parameter isdetermined; and finally the K parameter is compared with the detection threshold T so as to determine whether the image is the rainfall image. The effect is verified by using the actually measured data. The accuracy of the rainfall image identification method is higher than that of the method using the echo intensity mean and the diversity factor for 16.6% and higher than that of the method independently using the zero intensity percentage for 3.4% so that the radar rainfall image in the marine process can be more accurately identified, and the wave inversion error caused by the rainfall can be reduced.

The invention provides a linear adaptive equalizer based on channel estimation, which comprises a plurality of taps, a time delay unit and tap coefficients corresponding to the taps. The linear adaptive equalizer is characterized in that the specific number of the plurality of taps is determined by a tap quantity generating module, wherein the tap quantity generating module further comprises a sub-module for obtaining an amplitude impact response of the channel and obtaining the amplitude impact response of the channel according to a related value of a synchronizing signal of a communication data frame, a sub-module for building a discrete model of the channel and determining a coefficient hi of the discrete model of the channel according to an estimation result of the amplitude impact response of the channel, and a length n generation sub-module for obtaining a Lagrange remainder term and a diversity factor by expanding and solving the stage number of the discrete model reciprocal value of the channel and finally analyzing the relation of the diversity factor expression and the equalizer length n to obtain a result. The tap quantity generating module also comprises a sub-module for optimizing the tap quantity n, and the sub-module adopts a search algorithm.

The invention belongs to the field of oral cavity materials and particularly relates to a layered zirconia porcelain block technology with even contraction of all layers. By adopting the technical scheme, according to the required colors, the component and content of zirconia powder formulas of all the layers are determined, and zirconia porcelain blocks of all the layers comprise shallowest layers, transition layers and deepest layers; according to the content of yttria in all the formulas, the particle diameter distribution of zirconia and yttria in the shallowest layers and the deepest layers is adjusted, so that it is guaranteed that the contraction rate diversity factor of the shallowest layers and the deepest layers after sintering is smaller than 0.3%; the adjusted shallowest layersand deepest layers are evenly mixed to obtain the transition layers; the shallowest layers, transition layers and deepest layers are placed layer by layer according to the color shade sequence and subjected to isostatic pressing, pre-sintering and high-temperature sintering, and preparation is completed. By adopting the technical scheme, the layered zirconia porcelain block with natural colors, natural penetrability transition and a basically-constant contraction rate can be obtained.

The invention discloses a supercritical unit DEH side primary frequency modulation method. The method includes the following steps that firstly, the deviation value between the rated rotation speed and the feedback rotation speed of a turbine unit is obtained; secondly, the deviation value obtained from the first step is calculated through a speed diversity factor function, and a calculated result and a power command are superposed; thirdly, the deviation value between the superposed value obtained from the second step and the feedback power of the turbine unit is obtained; fourthly, the deviator value generated after PID calculation is conducted on the deviation value obtained from the third step and the deviation value is obtained; and fifthly, the deviator value obtained from the fourth step is calculated through a main steam pressure modification function, the main steam pressure modification value is obtained and input into an execution mechanism, and therefore the turbine unit is controlled to run. By the adoption of the method, the primary frequency modulation function of the unit can be safely input for a long time, the primary frequency modulation performance of the unit is excellent, and the method is of great significance in safety and reliability of a power grid and a power plant.

The invention relates to the filed of mode identification and information fusion, in particular to a multi-information fusion classification and identification method. The multi-information fusion classification and identification method includes: fusing data information from different data sources, constructing a fusion classifier, and achieving classification work of classifying individual objects into a certain object class. The multi-information fusion classification and identification method achieves measurement of similarities among multiple feature objects by using similarity distance, achieves a paired choice identification method for the multiple feature objects by using internal shape diversity factors, and achieves an identification method of choosing one from multiple choices for the multiple feature objects by using combination average diversity factors.