14results about How to "Balance" patented technology

The invention provides a comprehensive energy multi-element load short-term prediction method based on secondary decoupling, and the method comprises the steps: collecting a multi-element load data set, reconstructing a winter data set and a summer data set in the multi-element load data set, and carrying out the primary decoupling; decomposing the reconstructed winter data set and summer data set; dividing the decomposed data into a periodic term and a trend term so as to perform secondary decoupling; screening the trend items, and predicting the screened trend items to obtain a trend item prediction result; and performing multivariate load prediction on the periodic term to obtain a periodic term prediction result, and adding the trend term prediction result and the periodic term prediction result to obtain a final prediction result. According to the method, the coupling of the multi-element load piece can be effectively captured, accurate decomposition of nonlinear and non-stationary signals can be realized, the anti-noise capability and the time frequency resolution are improved, and the balance is considered while the prediction accuracy is effectively improved.

A tight coupling array antenna based on an integrated microstrip balun is composed of a plurality of polarization units, each polarization unit comprises an antenna floor, a magnetic wave-absorbing material is arranged above the antenna floor, a supporting material is arranged above the magnetic wave-absorbing material, a radio frequency connector is arranged in the antenna floor, the radio frequency connector is connected with one end of a coaxial feeder line, and the other end of the coaxial feeder line is connected with the antenna floor. The other end of the coaxial feeder line sequentially passes through the antenna floor, the magnetic wave-absorbing material and the supporting material; a lower substrate is arranged above the supporting material; a feed balun is printed on the upper surface of the upper-layer substrate, and a multiplexing oscillator arm is printed on the lower surface of the upper-layer substrate; the multi-layer board technology is adopted, the antenna radiator, the coupling body and the feed balun are printed on different copper layers of the multi-layer board respectively, space optimization is achieved, antenna impedance matching is further optimized, and the antenna has the advantages of being excellent in performance and easy to install; according to the invention, the feed balun in the form of the multi-order microstrip transmission line is adopted to optimize all-order microstrip transmission line models, so that the compactness of the antenna unit is effectively improved.

The invention relates to the technical field of cables, in particular to an airtight cold-resistant low-smoke flame-retardant instrument cable used in an explosive environment, which comprises a protective sleeve, a cable body mechanism is arranged in the protective sleeve, the cable body mechanism comprises inner sheaths, and a plurality of inner sheaths are uniformly mounted in the protective sleeve at equal intervals. According to the invention, heat dissipated in the use process of the cable can be utilized to preheat the main body structure of the cable, so that the cold resistance of the cable is improved while internal heat dissipation is promoted; according to the invention, the structure of the cable is improved, the connection stability among the structures of the cable can be improved, the air tightness of the cable is effectively improved, the throttling effect of the heat insulation shell and the guide ring can be fully utilized, the flame retardance of the cable is improved, the cable can be better matched with the external environment, and the application range of the cable can be effectively expanded while the working stability of the cable is improved.

The invention relates to the technical field of physiological signal processing, and discloses a millimeter wave radar multi-dimensional physiological feature decoupling heart failure early warning system and method, and the method comprises the steps: configuring a millimeter wave radar to transmit a dual-beam frequency modulation continuous wave signal, collecting human body reflection echoes, and generating a multi-channel original digital signal matrix; generating a chest region and acra region phase signal, an overall reflection signal amplitude sequence and an overall phase drift signal after spatial isolation enhancement through distance-Doppler combined processing; decoupling to obtain a beat-by-beat heartbeat interval sequence, a pulse wave transmission time sequence and a daily net body fluid variation sequence; obtaining a rule engine risk level and a machine learning early warning sign, and determining a final risk assessment level through fusion decision; synchronous high-precision collection and decoupling of non-contact multi-dimensional physiological parameters are achieved, and accuracy and specificity of heart failure decompensation early warning are improved through double-layer model fusion.

The application discloses a small sample geothermal resource prediction method and device, system and storage medium, comprising: learning the Bayesian prior knowledge with generalization ability from limited source data by meta-learning, migrating to a new small sample target area through a rapid adaptation mechanism, and utilizing multi-scale differential similarity calculation and mixed student distribution to realize high-precision point prediction and reliable uncertainty interval estimation. By adopting the technical scheme of the application, under the objective constraints of small sample, high cost and strong regional heterogeneity in geothermal resource exploration, high-precision, high-robustness and energy-based uncertainty reserve prediction can be realized.

The application discloses a muscle synergy analysis method based on surface electromyogram signals, and comprises the following steps: S1, collecting multi-channel surface electromyogram signals; S2, determining the number of muscle synergies by taking explained variance as the standard of the number of muscle synergies; S3, extracting muscle synergy features, and according to the envelope signal matrix Z i×r and the number of muscle synergies n, performing non-negative matrix decomposition on the envelope signal matrix Z i×r , and introducing a sparse constraint in the decomposition process, so that the process of extracting muscle synergy features is converted into an optimization problem; S4, obtaining a reconstructed matrix HY res obtained according to the optimization problem in step S3, that is, a decomposition result; S5, performing normalization processing on the synergy structure matrix H res , obtaining muscle activation states under different muscle synergy modules and analyzing the muscle activation states, obtaining a muscle synergy mode in the movement process, and calculating a reconstruction precision and a sparse degree. The method can achieve higher reconstruction precision and sparse degree in muscle synergy analysis, so that the quality and interpretation ability of data decomposition are improved.

The application discloses a technical virtual power plant voltage prediction method and system based on a high-temperature scene, relates to the technical field of power system voltage safety and virtual power plant operation control, and establishes a main grid, distribution network and transformer area multi-level voltage coupling model, systematically quantifies a bidirectional transmission relationship of main grid voltage support, distribution network power flow distribution and transformer area load fluctuation, solves the problem of insufficient mechanism description caused by only considering a single level in the prior art, and significantly improves the physical consistency of voltage prediction under extreme high temperature; and an index system associated with temperature and voltage and a self-adaptive SMOTE oversampling algorithm are proposed, a differentiated sample enhancement strategy is used to effectively solve the data imbalance problem caused by the scarcity of extreme high-temperature scene samples, the proportion of all types of samples is balanced, and the generalization ability of the prediction model to extreme scenes is significantly improved.

The invention relates to the technical field of underground roadway monitoring, in particular to a monitoring and early warning processing system and method for an underground construction site. The server comprises a data acquisition module, an identification module, a calculation module, a prediction module and an early warning module; wherein the prediction module is used for calling the first monitoring and early warning models corresponding to the abnormal sensors and the normal sensors after completing the calculation of the sensor data of all the abnormal sensors, and sending the sensor data corresponding to the abnormal sensors to the normal sensors; the sensor data corresponding to the normal sensor are used as input data to be input into the corresponding first monitoring early warning prediction model, and a first prediction result corresponding to the underground roadway at the current moment is output; and the early warning module is used for judging whether the underground roadway at the current moment is dangerous or not according to the first prediction result corresponding to the underground roadway at the current moment, and if yes, first early warning information is sent to the management end.

A tightly coupled array antenna based on an integrated microstrip balun is composed of a plurality of polarization units, wherein the polarization unit comprises an antenna floor, a magnetic absorbing material is arranged above the antenna floor, a supporting material is arranged above the magnetic absorbing material, a radio frequency connector is arranged inside the antenna floor, the radio frequency connector is connected to one end of a coaxial feed line, and the other end of the coaxial feed line passes through the antenna floor, the magnetic absorbing material and the supporting material in sequence; a lower substrate is arranged above the supporting material; a feed balun is printed on the upper surface of the upper substrate, and a reused dipole arm is printed on the lower surface of the upper substrate; the present invention adopts a multi-layer board process, and prints an antenna radiator, a coupler and a feed balun on different copper layers of the multi-layer board respectively, so as to achieve space optimization, further optimize the antenna impedance matching, and has the characteristics of excellent performance and easy installation; the present invention adopts a feed balun in the form of a multi-order microstrip transmission line, optimizes the microstrip transmission line model of each order, and effectively improves the compactness of the antenna unit.

This invention discloses a load balancing control method and system for photovoltaic energy storage charging stations, comprising: determining the average load power, load deviation value, and station power deficit value based on the branch load power of each charging branch; determining the lifetime loss weight based on the state of charge, cluster temperature, cluster internal resistance, and cumulative flux of each energy storage cluster; determining the power allocation interval corresponding to each energy storage cluster based on the lifetime loss weight and instantaneous power adjustment margin, and forming a branch compensation sequence; subsequently performing power compensation on each charging branch in sequence to obtain the target power sharing result for each energy storage cluster corresponding to each charging branch; and finally, performing coordinated control on each energy storage cluster and each charging branch based on the target power sharing result. This invention can balance both the station load balance and the lifetime balance of energy storage clusters.

The dam structure comprises a dam body, openings are formed in the front end and the rear end of the dam body, flow velocity reduction structures rotationally connected to the dam body are arranged between the openings in the two ends of the dam body, and the distance between the flow velocity reduction structures is smaller than the width of the openings of the dam body. An atomization structure penetrating through the outer side wall of the flow speed reduction structure is contained in the flow speed reduction structure, and an inflation structure is connected to the flow speed reduction structure in a meshed mode, fixed to the dam body and communicated with the inner side of the atomization structure; a water pumping structure is arranged at the bottom end of the flow velocity reduction structure and extends upwards to penetrate through the top end of the flow velocity reduction structure, and the dam body extends backwards corresponding to the top end of the water pumping structure and communicates with a water return channel; the front end of the dam body is rotationally connected with a control gate, and a power assisting structure is connected between the control gate and the flow speed reduction structure in an engaged mode. The dam structure has the effect that oxygenation and noise reduction are conducted on water flow of the overflow opening, and the surrounding ecology is improved as much as possible.

The utility model discloses an elevator counterweight housing traction system, which relates to the technical field of elevators and comprises a counterweight assembly, a base, a driving assembly and a steel wire rope assembly. The counterweight wheels are mounted at the top of the counterweight housing, and the two counterweight wheels are symmetrically distributed relative to the center line of the counterweight housing; the steel wire rope assembly comprises an even number of steel wire ropes, one half of the steel wire ropes are wound on one counterweight wheel, the other half of the steel wire ropes are wound on the other counterweight wheel, one end of each steel wire rope is fixed to the machine base, and the steel wire ropes are wound around the corresponding counterweight wheels, then penetrate out of the middle area between the two counterweight wheels and are connected with the traction wheel. The two counterweight wheels are symmetrically arranged on the top of the counterweight housing in the left-right direction, and the steel wire ropes are wound on the counterweight wheels in groups, so that centralized arrangement of traction ropes on the counterweight housing is realized, the counterweight housing does not need to be integrally shifted to the side wall of a shaft, interference risks caused by insufficient space are effectively reduced, stress of the counterweight housing during lifting is more balanced, and the service life of the counterweight housing is prolonged. The operation stability is improved.

The utility model relates to an open type water pump for a cleaning machine and the cleaning machine, the water pump comprises a pump shell and an impeller, the upper surface of the impeller is provided with a back blade extending from the central part to the edge, at least the part of the back blade close to the edge of the impeller gradually extends downwards and inclines along the radial direction from inside to outside to form a slope, and correspondingly, the back blade is provided with an opening. The top wall of the pump shell gradually arches upwards inwards from the position corresponding to the outer edge of the impeller to form a matching cavity matched with the slope. The back blade is arranged on the back portion of the impeller, the outer end portion of the back blade is arranged to be of the slope structure, the top wall of the pump shell is arranged to be of the corresponding inverted conical table structure, in the operation process of the impeller, the back blade greatly reduces the pressure difference between the upper portion and the lower portion of the impeller, and therefore axial force of the impeller is reduced, and noise is reduced. The slope of the back blade and the corresponding pump shell matching cavity structure not only are beneficial for further reducing noise, but also can consider the vertical height of the water pump, so that the better water pumping efficiency of the water pump is maintained.

The application discloses a content uploading method, a wearable device and a storage medium, and relates to the technical field of wearable devices. The method comprises the following steps: after receiving an interaction instruction, acquiring collected image data; extracting text information in the image data to obtain text data, and selecting at least one first index for evaluating the quality of the text data; acquiring or setting a decision rule corresponding to the first index, and deciding an uploading mode according to the decision rule and the first index, wherein the uploading mode is uploading text or uploading an image; and uploading corresponding data to a target device according to the uploading mode, so that the target device executes the interaction instruction based on the received data. The application reduces the invalid image transmission process and reduces the data transmission power consumption.