32 results about "Array performance" patented technology

The invention relates to the field of photovoltaic operation and maintenance, and discloses a photovoltaic operation and maintenance decision-making system and method based on data driving, and the method comprises the steps: carrying out the continuous mapping of a photovoltaic power station assembly cluster through an acquisition node, and generating a data priority chain table related to the shielding sensitivity; performing cross-domain synchronous tracking of a multi-scale variation sliding window on the data priority linked list, and constructing a multi-dimensional coupling feature tensor of photovoltaic array performance degradation; based on a multi-dimensional coupling feature tensor, a self-adaptive redundancy stripping model is utilized to extract a component attenuation evolution trajectory, and power generation efficiency clustering density mutation and power entropy migration inflection points are identified; component clusters and electrical coupling chains corresponding to the potential performance degradation candidate event set are calibrated as candidate intervention areas, and a local power generation income interference topological graph is constructed; and based on the local power generation income interference topological graph, dynamically reconstructing the sensing weight, the operation and maintenance window and the trigger threshold. The method has the advantage of improving the overall power generation income of the photovoltaic power station.

The invention discloses a photovoltaic array design simulation optimization method, and relates to the technical field of intelligent photovoltaic system optimization, and the method comprises the steps: designing a photovoltaic array according to a herringbone shape, and constructing a photovoltaic array three-dimensional model; based on the photovoltaic array three-dimensional model, a computer domain and boundary conditions, multi-physics field coupling simulation setting is carried out; training a machine learning model by using historical data, predicting interaction among different physical fields, and identifying a key region needing higher grid density according to conditions set by multi-physical field coupling simulation; dynamically adjusting the grid density according to the identified key area; operating multi-physics field coupling simulation by using the adjusted grid density, and evaluating the performance of the photovoltaic array; and adjusting the design scheme of the photovoltaic array according to the evaluation result. According to the method, through herringbone design and multi-physical field simulation, the grid is optimized in combination with machine learning, the photovoltaic array performance is comprehensively evaluated and improved, the photovoltaic technology innovation is promoted, and the cost is effectively reduced.

The present invention discloses a wide microstrip antenna array based antenna system for millimeter wave applications. The microstrip antenna array based antenna system of the present invention includes plurality of patch antennas and each of the patch antennas includes a U-slot of unequal arms. This patch antenna with the U-slot acts as the array element. The array elements are placed in a linear array at a distance of λ / 2 from each other on the antenna substrate to achieve desired scan performance. The microstrip corporate feed network with T-junction power divider is used. The antenna elements are fed by electromagnetic coupling with the feed network. The antenna array with dummy elements on both sides of the linear array together with an extra ground plane is used to achieve improved array performance with high main lobe gain and reduced side lobe.

The invention relates to the technical field of data storage, and discloses a construction method of a hybrid mapping structure and a related device.The construction method of the hybrid mapping structure comprises the steps that a mapping pair is obtained; judging whether the logic address is a continuous non-large-page alignment address or not according to the global bitmap; if the logical address is not the continuous non-large page alignment address, judging whether the continuity of a logical address field corresponding to the logical address is greater than a continuity threshold value or not; if the continuity of the logic address field is greater than a continuity threshold value, inserting the mapping pair into a compact array; if the continuity degree of the logic address field is smaller than or equal to a continuity degree threshold value, the mapping pair is inserted into a range bucket hash structure, and the mapping pair is stored by adopting a mixed mapping structure formed by combining three data structures including a global bit chart, a compact array and the range hash bucket structure, so that the memory overhead of the flash memory equipment can be optimized, and the memory performance of the flash memory equipment is improved. The memory is saved in a pure sequential read-write scene, and the performance of the array is kept in a pure random read-write scene.

The invention relates to the technical field of array antennas, and discloses a common-caliber layout-based ultra-wideband array antenna, which comprises a low-frequency unit and a high-frequency unit which are arranged based on a common caliber, and is characterized in that the working frequency of the low-frequency unit covers an fmin-f0 frequency band, and the working frequency of the high-frequency unit covers an f0-fmax frequency band. The low-frequency unit is a broadband dual-polarized antenna, a uniform tight coupling array distributed at equal intervals is formed by adopting a tight coupling principle, and the unit interval is calculated based on a grating lobe suppression condition at the frequency f0. The high-frequency unit is a miniaturized broadband dual-polarized antenna and adopts a sparse array form; the initial unit spacing and the unit number of the sparse array are calculated based on the grating lobe suppression condition at the highest frequency f2 of the f1-f2 frequency band with the side lobe requirement between the f0-fmax frequency bands. The ultra-wideband array antenna gives consideration to full-band array performance, can provide sufficient space for active circuit arrangement, and effectively reduces power consumption and cost.

The invention discloses a wireless communication network optimization method and system based on multi-intelligent-reflecting-surface grouping, and belongs to the field of intelligent-reflecting-surface-assisted wireless communication, and the method comprises the steps: building a multi-IRS-assisted wireless communication network according to the coverage characteristics of the equivalent cascade link information of a plurality of IRSs; according to the statistical property of the optimal beam domain channel state information, intelligent pre-grouping is carried out on reflection units of a plurality of IRSs, and each group of units share the same reflection coefficient; analyzing array performance gains of different pilot frequency overhead under a single-user single-antenna cascade channel; a system capacity of a multi-IRS intelligent packet assisted wireless communication network under a Rice channel is evaluated. According to the method provided by the invention, the number of pilots for estimating the channels related to the IRS can be greatly reduced while the multi-user communication service quality is improved.

The invention provides a sub-array optimal distribution method and system based on a quantum antelope optimizer, and belongs to the field of array signal processing. The invention aims to solve the problem of inaccurate estimation of distributed array performance attenuation and direction of arrival due to reduction of the number of snapshots and change of interference noise under the conditions of small sampling snapshots and impact noise. According to the method, the array structure is optimized under the impact noise condition, received signals are processed by constructing an infinite norm weighted fraction low-order covariance matrix, and the method is more suitable for the environment where the number of snapshots is reduced and the impact noise is severe; a quantum optimization mechanism is introduced, and the performance and search efficiency of an original algorithm in the distributed array research direction are improved based on an evolution strategy of a quantum rotation angle and a quantum rotation door; according to the method, the direction finding accuracy of the distributed array system can be improved, and the situation that the array performance influence factors in the actual direction finding application are not considered sufficiently and the performance improvement is not large due to the fact that the directional diagram of the array serves as the optimization target can be effectively avoided.

The invention discloses a photovoltaic array simulation experiment system and a simulation experiment method. The photovoltaic array simulation experiment system comprises a photovoltaic module, a simulation box, a simulation circuit and a control module, wherein the photovoltaic module comprises a plurality of photovoltaic modules; the analog circuit comprises a main circuit, a plurality of branch circuits and a plurality of bridge circuits which are mutually connected, the main circuit is connected with a variable resistor and a voltage and current acquisition module in series, each branch circuit is connected with photovoltaic modules in the same column in series, and each bridge circuit is provided with a sub-switch and is connected with two adjacent branch circuits; the control module is connected with the photovoltaic module and the analog circuit. According to the embodiment of the invention, through the design of the trunk circuit, the branch circuit and the bridge circuit of the simulation circuit, photovoltaic arrays with various different connection modes are simulated through the same simulation system. The design of the simulation box enables the simulation system to have good expansibility, and a plurality of environmental factors can be introduced and simulated. The system can collect the photovoltaic array performance under different conditions, and is suitable for different experiment requirements.

The application provides an array performance quantification analysis method and system for sea wave direction spectrum estimation, and relates to the technical field of array performance quantification analysis. The method comprises the following steps: determining the analytical upper limit of the array through wave number spectrum window calculation; determining the information utilization rate of the array by comparing the equivalent measurement point number and the real measurement point number of the array; obtaining the wave number sidelobe level by calculating the ratio of the maximum sidelobe peak value to the main lobe peak value in the wave number spectrum window, and then determining the energy leakage level of the array; determining the observation ability of the array by calculating the normalized average nearest neighbor distance between each measurement point of the array; obtaining the main lobe concentration degree by calculating the angle deviation between the direction of the vector and the direction of the center line of the correlation matrix of the array, and then determining the advantages and disadvantages of the main lobe shape of the array; and comprehensively evaluating the quantitative evaluation results of the above five dimensions to form the quantitative evaluation of the comprehensive performance of the array. The application is suitable for arrays with any measurement point number, and the performance pre-evaluation can be completed before the array is deployed.

The invention belongs to the technical field of array signal processing, and provides an extended co-prime array optimization method based on hole-driven greedy complementary points. The method comprises the following steps: S1, constructing an extended co-prime array, and selecting co-prime pairs (M, N) to generate a sub-array I and a sub-array II; s2, translating the sub-array 2, and determining a unique optimal shift amount through a comprehensive evaluation function; s3, turning over the second sub-array on the basis, extracting a hole set in the virtual differential array, adopting a greedy strategy to gradually supplement points to improve the center continuous degree of freedom, and controlling the number of newly added array elements through a parameter K; and S4, when the number of iterations reaches K or the complementary points are invalid, ending and outputting a final array structure. S5, performing direction of arrival estimation by using a spatial spectrum estimation algorithm under the ideal and coupled model; according to the method, the center continuous interval of the virtual array can be obviously expanded under the condition of limited physical array elements, the structure utilization rate and the array performance are improved, the accuracy and stability of direction-of-arrival estimation are improved, and the method has high engineering application value.

The application discloses a MUSIC damage positioning method based on self-excitation self-adaptive correction, which is used for improving algorithm positioning precision; in complex structure application, the structure has high anisotropy, in addition to the influence of sensor space layout error on array performance, the MUSIC damage positioning method has low precision. The array itself excitation array element is used as a correction source in the application, so that the additional correction source is avoided, the excitation array element has multiple directions relative to the sensor array, the actual time delay of each sensor array element in different directions is measured by receiving the self-excitation signal of the correction source; the distance from the self-excitation correction source to each sensor array element and the signal propagation speed are used to obtain the theoretical time delay from the self-excitation correction source to each sensor array element, and the array time delay error under the measurement of the self-excitation source is obtained by subtracting the actual time delay from the theoretical time delay; finally, in the search process, the time delay error of the corresponding self-excitation correction source direction is selected adaptively according to the search angle to correct the steering vector, so that the damage positioning precision can be improved.

The application discloses a kind of coordinated control methods of flywheel energy storage array, it is related to flywheel control technical field, the method includes: obtaining data;Wherein, the data includes: power grid frequency deviation and the state data of each flywheel;Total power demand is calculated based on the power grid frequency deviation;Available power of each flywheel is calculated based on the flywheel state data;The distribution power of each flywheel is optimized by model predictive control;Controller sends distribution power to each flywheel, and flywheel adjusts power by converter.By the processing scheme of the present application, by introducing dynamic health assessment and model predictive control, power distribution can be optimized, and array performance can be improved.

The invention provides a low-profile dual-circularly-polarized microstrip antenna array control method and system, and relates to the technical field of array control, and the method comprises the steps: constructing a multi-dimensional intelligent metamaterial feed network, employing a programmable metasurface structure, adjusting an electromagnetic wave transmission path in real time through employing a micro-electromechanical switch array, and driving an orthogonal coupling feed device to achieve precise feed. And the array performance is dynamically optimized by combining a brain-like adaptive beam forming system of a neuromorphic calculation chip. According to the invention, intelligent autonomous control of the antenna array can be realized, and the space coverage capability and the electromagnetic compatibility are improved.

The present disclosure provides an integrated antenna array with feed and calibration networks. These components are integrated together on a multi-layer printed circuit board (PCB). This integration on the PCB allows the array to be smaller, more cost-effective while achieving the required array performance for 5G NR FR1 mMIMO radios and supporting both single and multi-beam applications. The antenna array utilizes electrically small antennas with high-permittivity dielectrics to minimize both size and mutual coupling effects.

Systems and methods are provided for performing a reduced precision number multiply-accumulate operation in a systolic array. Each row of the systolic array may receive a reduced input from a respective reducer. The reduced input may include reduced input data elements and / or reduced weights. The systolic array may lack support for an input having a first bit length, and the reducer may reduce a bit length of a given input from the first bit length to a shorter second bit length and provide the reduced input to the array. To reduce the bit length, the reducer may reduce the number of trailing bits of the input. In addition, the systolic array may receive a reduced and rounded input. The systolic array may propagate the reduced input through processing elements in the systolic array. Each processing element may include a multiplier and / or an adder to perform an arithmetic operation based on the reduced input.

The invention provides a sound source positioning sensor mounting module for pipeline leakage monitoring. The sound source positioning sensor mounting module comprises an array main body, an integrated array plate, an array cover plate and a fastener. The upper side of the array main body is provided with a first annular body with a limiting hole and a second annular body and a first threaded hole, and the lower side of the array main body is provided with a mounting module. The integrated array plate is in a disc shape, array element microphones and cameras in a multi-arm spiral array are arranged on the integrated array plate, and positioning blocks are arranged on the outer side of the integrated array plate. The array cover plate is provided with corresponding array element holes and camera shooting holes, and the lower side of the array cover plate is provided with a third annular body with a third threaded hole. During assembly, the integrated array plate is positioned in the clamping groove of the array main body through the matching of the positioning block and the limiting hole, and the array cover plate is fixed with the array main body through a fastener. The device is compact in structure and reliable in connection, signal acquisition quality can be effectively guaranteed, array performance can be flexibly adjusted by replacing the array plate, acoustic and visual signals are combined, and rapid and accurate positioning of pipeline leakage points is achieved.

Systems and methods are provided for performing reduced-precision multiply-accumulate operations in a systolic array. Each row of the systolic array can receive a reduced input from a respective reducer. The reduced input can include a reduced input data element and / or a reduced weight. The systolic array can lack support for inputs having a first bit length, and the reducer can reduce the bit length of a given input from the first bit length to a shorter second bit length and provide the reduced input to the array. To reduce the bit length, the reducer can reduce the number of trailing bits of the input. Additionally, the systolic array can receive reduced and rounded inputs. The systolic array can propagate the reduced inputs through processing elements in the systolic array. Each processing element can include a multiplier and / or an adder to perform arithmetic operations based on the reduced inputs.

The invention discloses a non-volatile computing storage array based on a 1FeFET-1C structure and a parasitic capacitance compensation method, and aims to solve the problems of array output linearity reduction and sensing margin reduction caused by mode dependence on capacitance change in the prior art and realize accurate evaluation and optimization of large-scale CiM array performance. The compensation method comprises the steps that a FeFET device model containing a GAA nanowire channel and fully surrounding a ferroelectric layer is established on a TCAD platform, and equivalent fixed charges are introduced into the interface of a semiconductor and the ferroelectric layer to simulate the polarization state of a low-threshold LVT and the polarization state of a high-threshold HVT respectively; in different polarization states, extracting gate-source capacitance and gate-drain stray capacitance of the FeFET device and interconnection coupling capacitance between a bit line and a word line; the device-level parasitic parameters are integrated into an array simulation model comprising a 1FeFET-1C memory cell to evaluate the influence of parasitic characteristics on the linearity and sensing margin of the array output voltage.

Methods and apparatuses for improving storage array performance by using time-series characteristics on both a local storage area (extent-level, or track-level) basis as well as global, system level are disclosed. The time series characteristics are input to an aging model where optimal aging times, on a per-extent basis, are forecasted according to the local and global characteristics. The aging model may be a multivariate time-series model. Incoming write requests may be destaged from cache memory according to the forecasted optimal aging times for the storage extents.

The present invention discloses a wear leveling method for data stripe reconstruction in RAID5, including S10, monitoring the wear rate of array hard disks; S20, judging whether the array needs wear leveling; if yes, then S30, calculating the reconstruction value of each stripe; S40, selecting and reconstructing the data stripe, and continuing to execute S20 after a certain delay; wherein, in S30, a stripe write heat calculation method based on the decay of heat weight over time is used to evaluate it, and then the hard disk life influence coefficient and load compensation coefficient are combined to provide reconstruction value as a basis for wear leveling. The stripe selection strategy of the present invention reconstructs the data stripes in the array, adjusts the position of the check data block, optimizes the life consumption process of each hard disk in the all-flash hard disk array, and achieves the purpose of wear leveling while reducing the impact on array performance.

Disclosed methods and apparatuses embody techniques for advantageous packing and deployment of an inflatable net for use as a randomized sparse array offering gain and beam-count equivalent with a conventional phased-array of the same number of antenna elements and near-equivalent spatial discrimination (beam definition) as compared with a conventional phased array of the same effective diameter. Operation of the deployed net as a randomized sparse array greatly relaxes the mechanical tolerances associated with deployment, such that array performance does not depend on achieving precise or predetermined spatial relationships among or between elements in the array. Additionally, the voids inherent in the net structure offer greatly reduced overall mass and volume, making practical the stowage and launch of inflatable nets that deploy into very large arrays.

The invention discloses a sonar buoy array efficiency determination method, device and equipment and a storage medium, and is applied to the field of sonar detection. Based on the sonar buoy array, multiple times of detection are carried out on the simulated motion trail, and the single detection probability of a single sonar buoy in the sonar buoy array on the target is determined; determining the instantaneous detection probability of the sonar buoy array under each detection frequency based on the single detection probability, and inputting the instantaneous detection probability into a time sequence correlation cumulative detection probability model to obtain the cumulative detection probability of the sonar buoy array within each detection frequency; and determining the accumulated detection probability in the total detection times in the detection process of each simulated motion track, and determining the mean value of the accumulated detection probability in the total detection times as the efficiency of the sonar buoy array. The cumulative detection probability of multiple times of target detection is determined by using a time sequence correlation buoy array cumulative detection model, and the correlation between single instantaneous detection probabilities of the buoy array is considered, so that the efficiency of the obtained sonar buoy array is more accurate.

The utility model discloses an area array detection system based on a through-the-wall radar, which comprises a radar master controller and an antenna area array, the antenna area array comprises four transmitting antennas and six receiving antennas, the four transmitting antennas and the six receiving antennas are respectively and electrically connected with the radar master controller, the four transmitting antennas are respectively positioned at four vertexes of a rectangular surface, and the six receiving antennas are respectively positioned at the four vertexes of the rectangular surface. Two long edges of the rectangular surface are respectively provided with two receiving antennas, two short edges of the rectangular surface are respectively provided with one receiving antenna, and the distance between the transmitting antenna and the adjacent receiving antenna is equal to the distance between the adjacent receiving antennas. According to the detection system disclosed by the utility model, a step frequency system is adopted, the helical antennas are arranged in a central symmetry manner to form an area array, and the spacing of each array element is accurately calculated, so that the Nyquist sampling theorem is met, and an interference region is small enough as much as possible, thereby avoiding the influence of grating lobes on the array performance.

The application discloses a sparse MIMO array design method based on genetic optimization, which is used for realizing high-resolution virtual array construction under the condition of reducing the number of transmitting and receiving array elements, and comprises the following steps: firstly, multiple geometric subarray structure constraints are constructed according to array performance evaluation indexes; then, population and system parameter settings are initialized; secondly, a multi-objective constraint model is established with the optimization target of maximizing fitness; subsequently, the model is solved by using an improved genetic algorithm until the algorithm converges, and finally, a sparse MIMO array structure satisfying the performance optimization and the quantity constraint is obtained. Compared with the prior art, the application enhances the controllability of the array structure by introducing the geometric subarray constraint, and guarantees the expected aperture form of the virtual array; the improved genetic algorithm can realize global search under the condition of fixed antenna number, and avoids local optimization; compared with the traditional method, the application has good engineering implementation and algorithm universality.

The invention belongs to the technical field of data storage, and relates to an all-flash array based on software and hardware collaborative design. The all-flash array comprises an AFA address space which is used for sequentially recording data written by a user; k continuous data blocks in the AFA address space form a stripe, and each stripe records the storage positions of the k data blocks and the corresponding m verification blocks in the SSD; the storage space of the SSD in the all-flash array is divided into a normal area and an instantaneous area, and the two areas are respectively organized into a horizontal stripe and a vertical stripe; and completing a copying stage and a conversion stage by using the horizontal stripe and the vertical stripe. Through software and hardware collaborative design, the conversion stage is unloaded into the SSD to be completed, so that the problem of performance reduction caused by a large number of I / O between a host and the SSD in the stage is solved; the influence of SSD garbage collection on the array performance is relieved through software and hardware collaborative design, garbage collection detection and garbage collection avoidance.

The invention discloses an angle measurement method for optimizing a distributed array long baseline based on an NBLFM signal, and the method comprises the steps: obtaining a synthetic antenna directional diagram through the NBLFM signal and a distributed antenna array structure, reducing the side lobe of the synthetic directional diagram to the greatest extent through constructing an optimization function related to the length of the directional diagram and the baseline, and determining the optimal long baseline. And performing beam scanning on the echo signal, and traversing the signal-to-noise ratio to obtain a group of beam scanning measurement angles corresponding to the signal-to-noise ratio. According to the invention, more NBLFM signals used in practice are selected to directly optimize the baseline length, the generation and processing of the NBLFM signals are relatively simple, the design of required hardware is easier, and the cost is lower. The synthetic antenna pattern is simplified, the influence of the baseline length on the array performance is well utilized in combination with the optimization function, and the length of the optimal baseline can be simply and efficiently determined.

The embodiment of the invention discloses a circularly polarized antenna array design method, a circularly polarized antenna array design device, computer equipment and a computer readable storage medium. The method comprises the following steps: when a design demand is obtained, determining a circular ring number range and an included angle range according to the design demand; setting initialization design data according to the circular ring number range and the included angle range, wherein the initialization design data comprises a circular ring radius set and a unit included angle set; iteratively initializing the design data by using a preset optimization algorithm to obtain first design data; performing verification operation on the first design data; if the first design data does not pass the verification operation, marking the first design data as the initial design data and carrying out iteration again; and if the verification operation is passed, marking the first design data as second design data and outputting the second design data. Therefore, the array layout is adjusted and optimized through an optimization algorithm, and multiple variables are optimized at the same time, so that the array performance is optimal, and the broadband circular polarization work is finally realized.

The present invention discloses a dual-band hybrid sparse array beam synthesis method, which belongs to the field of array antenna beam synthesis technology. The method comprises the following steps: (1) parameter setting; (2) iterative optimization of an improved genetic algorithm for an A-band sparse array; (3) algorithm post-processing to obtain array mapping and array performance index parameters; (4) B-band sparse array optimization pre-processing to obtain a B-band dual-array index matrix based on the A-band array sparse matrix and the B-band dual-array array area allocation; (5) the same process as (2); (6) the same process as (3); (7) obtaining the array arrangement of the dual-band hybrid sparse array based on the array mapping of the A-band array and the B-band dual-array. The method adopts the method of interleaved placement of subarrays and dual-band serial optimization to effectively solve the problem of dual-band hybrid sparse array and has high engineering application value.

Methods and apparatuses for improving storage array performance by using time-series characteristics on both a local storage area (extent-level, or track-level) basis as well as global, system level are disclosed. The time series characteristics are input to an aging model where optimal aging times, on a per-extent basis, are forecasted according to the local and global characteristics. The aging model may be a multivariate time-series model. Incoming write requests may be destaged from cache memory according to the forecasted optimal aging times for the storage extents.

The invention discloses a phase-only weighted beamforming method for a planar array considering a mutual coupling effect, and the method comprises the steps: carrying out the simulation extraction of AEP of each unit through building a small array, i.e., a subarray of a target large array, and enabling the AEP of each unit of the extracted subarray to be approximately equivalent to the AEP of other units of the target large array through a calculation method of subarray extrapolation; substituting the algorithm into the algorithm to increase the robustness of the system; setting an upper and lower bound constraint function and an auxiliary variable of directional diagram synthesis, introducing parameters such as a scale factor and a Lagrange multiplier, and constructing a directional diagram synthesis mathematical expression and an augmented Lagrange function; iteratively updating the auxiliary variable, the scale factor, the feed phase of each unit of the antenna array and the value of the Lagrange multiplier, and solving the equation to obtain a phase-only comprehensive result; according to the method, the influence of the mutual coupling effect on the array performance is avoided, the feed phase is calculated through the classical ADMM algorithm and the BFGS algorithm, the solving process is simplified, and large-scale problems can be efficiently and accurately solved.