83results about How to "Consider complexity" patented technology

A solid state, bidirectional light sheet and method of fabricating the sheet are disclosed. In one embodiment, bare LED chips have top and bottom electrodes, where the bottom electrode is a large reflective electrode. An array of LEDs (e.g., 500 LEDs) is sandwiched between at least two transparent substrates having conductors bonded to the electrodes without wires. Various ways to connect the LEDs in series are described along with various embodiments. The light sheets are formed to emit light from opposite surfaces of the light sheet to create a bidirectional light sheet. The light sheet may be suspended from a ceiling to be perpendicular to the ceiling, or the angles of the light sheet may be adjusted. The suspended light sheet may form a cylinder for uniform illumination of the floor and ceiling. Lenses may be formed in the light sheet to emit light at any peak intensity angle to achieve any light emission pattern.

The invention discloses a quasi-cyclic low density parity check code (LDPC) construction method and a device based on protographs. The protographs are expanded for two times in the construction method. A first expansion time L1 is smaller. A correcting progressive edge growth (PEG) algorithm is adopted to remove multiple edges of protographs. The girths of codes which are expanded are increased. A second expansion time is L2 and a cyclic shift offset is selected for connection which is established in the first expansion. Each connection corresponds to a unit cyclic matrix, wherein the size of the unit cyclic matrix is L2 * L2. The method references a local optimization idea of the PEG algorithm to construct a basis matrix of the quasi-cyclic LDPC code. The connection is established between each row of variable nodes and checking nodes and is confirmed in corresponding cyclic shift offset process. According to the correcting PEG algorithm, new rings formed in the basis matrix caused by the newly established connection are gone through. The fact that expansion factors A of the rings are larger than one is guaranteed. Thus, the rings with length of four are avoided. The number of short rings is reduced. The short rings which are small in connectivity emerge in a checking matrix are avoided by utilizing an ACE multiplication principle.

The invention extends the connotation range required to be protected on the basis of a previously issued patent ZL200710025045.4, i.e., a nanometer microcrystalline composite filter material and a preparation method thereof, belonging to the field of a water disposal technique material. According to weight percentage, the nanometer microcrystalline composite filter material comprises 3-95 percent of attapulgite clay, 5-80 percent of sepiolite clay, 2-25 percent of kaolinite clay, 2-97 percent of tubular halloysite, 5-75 percent of diatomite, 5-75 percent of natural zeolite (clinoptilolite, mordenite and the like), 0-25 percent of pillared montmorillonite, 0-50 percent of expanded vermiculite, 0-5 percent of expanded perlite and 0-50 percent of active carbon or bamboo carbon powders. All raw materials which are powder shapes are mixed according to proportion and stirred to granulate by adding an inorganic adhesive, then sintered and activated at the temperature of 900-500 DEG C (inert gas is required for sintering and activating the filter material added with active carbon). The nanometer microcrystalline composite filter material has smooth shape, rough surface and uniform particle size, with the diameter of 1-10mm, and is used for biological filter tanks and high-class adsorption filter materials in deep purification systems of drinking water and reclaimed water sewage disposal systems.

An interface circuit from Common Mode Logic to a low voltage, fixed common mode output, with high current drive. The CML signal is received, and then re-referenced to a low-voltage band-gap supply. The circuit is arranged to provide an output data signal referenced to a second positive reference voltage supply responsive to receipt of a common mode input data signal referenced to a first positive reference voltage supply. The circuit avoids use of vertical PNP transistors in the signal path.

A method and an arrangement are suggested for determining a temperature quantity in a mass flow line which includes a throttle position and to which an additional gas mass flow is supplied after the throttle position. The temperature ahead of the throttle position is determined on the basis of the portion of the additional gas mass flow in the total flow in dependence upon the temperature of the mixture of the two gas mass flows as well as the temperature of the introduced gas mass flow.

A piezoelectric ceramic objective driver control method includes the steps of separating a process of optimizing initial parameters of a proportion integration differentiation (PID) controller from a process of online adjustment, and configuring the optimized initial parameters to an online control algorithm to accurately control a piezoelectric ceramic objective driver quickly. In an off-line state, global optimization of the initial parameters of the PID controller is completed by a genetic algorithm in advance, the optimized initial parameters are configured into a process of online fuzzy PID control and are subjected to online feedback and real-time control, and accordingly, the piezoelectric ceramic objective driver is subjected to micro-stepping location under drive. By the piezoelectric ceramic objective driver control method, the piezoelectric ceramic objective driver can be controlled accurately and is low in output overshot, high in stability and response speed.

The invention discloses a method for cleaning traffic flow data on the basis of time-space analysis. The method is implemented by a dirty data storage module, a clean data storage module and an computation module, wherein the dirty data storage module stores traffic flow information according to a fixed format without changing the fixed format, and the traffic flow information is received in real time; the computation module extracts the latest data from the dirty data storage module at fixed intervals, and simultaneously extracts data from a clean database to perform computation, and the data from the clean database has time and space matching relations with the latest data; and the clean data storage module stores data according to the fixed format, and the data are computed by the computation module. The method has the advantages that a procedure for cleaning the traffic flow data is simplified, a time-space parallel analysis process is adopted, accordingly, operation for cleaning the traffic flow data is carried out conveniently, quickly and accurately, and the method has actual engineering application value in aspects of simplifying procedures for cleaning traffic flow data and improving the cleaning quality of the traffic flow data.

The invention discloses an intelligent terminal user switching method and device. The intelligent terminal user switching method and device comprises the following steps of obtaining equipment information of currently connected equipment which is connected in a matching mode obtaining the corresponding user information according to the equipment information; switching users according to the user information. According to the intelligent terminal user switching method and device which is used for executing operations for automatically switching users through the equipment which is connected in a matching mode, the operations for automatically switching the users are performed at the background of the intelligent terminal, the safety and the privacy of the intelligent terminal are improved, an operator can set the corresponding relation between the equipment which is connected in a matching mode and the user, the complexity and the intelligence of the operations are taken into consideration, and the operation experience of the operator is optimized.

The invention discloses a self-adaptive time-space domain cumulative filtering and tone mapping video enhancement method. The invention provides an improved self-adaptive time-space domain cumulative filtering method aiming at the problem of large noise and relatively low gray value in a low-illumination video. As for the filtered video, the intensity is adjusted by adopting an improved piecewise tone mapping function; the improved method has relatively obvious enhancement effect on the low-illumination video. The invention takes account of image denoising smooth effect, image clarity and algorithmic time complexity, and has great application value of popularization in video monitoring due to that the method is simple in algorithm, does not need multifarious iteration, and can be easily achieved by VC.

The invention relates to a time index indication method, a base station, a storage medium and an electronic device. The time index indication method includes the following steps that: subcarrier spacing is acquired; the number of time slots of a synchronization signal burst corresponding to the subcarrier spacing is set according to the subcarrier spacing; and PBCH DMRSs are set according to the subcarrier spacing, and the number of symbols included in the time slots of the synchronization signal burst corresponding to the subcarrier spacing so as to indicate the number of bits of a synchronization signal block index in the synchronization signal burst, and PBCH load is set according to the subcarrier spacing, and the number of the symbols included in the time slots of the synchronizationsignal burst corresponding to the subcarrier spacing so as to indicate the number of bits of a synchronization signal burst index in a synchronization signal burst set. With the time index indicationmethod provided by the above technical schemes of the invention adopted, the detection performance and complexity of the index information of synchronization signal blocks can be well balanced.

A soft symbol decoder for use in a multiple input multiple output (MIMO) and OFDM (orthogonal frequency division multiplexing) system. The decoder generates soft symbol values for a digital signal that represents a number of source bits. The source bits are transmitted as symbols in corresponding to points in a signaling constellation. Soft metrics are determined by searching for all possible multi-dimensional symbols that could have been transmitted. The method includes transmitting a sample of the multi-dimensional symbol using K transmit antennas. The multi-dimensional symbol is represent-able as a complex, K-dimensional vector x. Each vector component of vector x represents a signal transmitted with one of the K transmit antennas. After transmission through a communication channel, a sample corresponding to the transmitted sample is received. The received sample is represented by a complex, N-dimensional vector y, where N is the number of receive antennas in the MIMO system. After the sample is received, a soft metric L(bi) is determined for each bit bi encoded by x according to the equation:L⁡(bi)=σ-2·(minxj⁢bi=-1⁢y-Hxj2-minxj⁢bi=+1⁢y-Hxj2),and xj represents all possible values for x. In addition, a reduced complexity method is used for providing soft metric values in the MIMO system. This exemplary aspect reduces the complexity of the above computations from 2BK to 2B(K−1), where B is the number of bits transmitted per symbol per antenna.

The invention provides a vehicle reference trajectory tracking method and system. The vehicle reference trajectory tracking method comprises the steps: acquiring the current speed of a vehicle, the yaw velocity of the vehicle, the curvature of a reference trajectory, the relative course angle deviation and the relative transverse position deviation of the vehicle and the reference trajectory and the expected performance index of a vehicle motion controller in real time; according to the current vehicle speed, the vehicle yaw velocity, the curvature, the relative course angle deviation, the relative transverse position deviation and the expected performance index, calculating to obtain an expected yaw velocity; and calculating to obtain a final steering wheel angle of the vehicle accordingto the expected yaw velocity, and controlling the vehicle to output the final steering wheel angle. The controller is directly designed according to expected performance indexes of the motion controller, and the method has the advantages of being good in control effect, small in parameter adjustment workload, capable of shortening the development period and the like.

This invention relates to a packeting method for pilot sub-cariers in an OFDMA system, which packets sub-carriers in pilot symbols against user U, in which, the pilot packet number and symbols of U are variable and the sub-carrier numbers are equal, and the value sphere is 1-U, U is all the user number in the OFDMA system, besides, this invention also puts forward a channel estimation method, by this invention, user numbers and / or antennas supported simultaneously can be increased at the most and complete frequency domain channel response of all antennas of all users can be got with the help of part frequency resources distributed to each user, besides, it can avoid or reduce influence of narrow band interference.

The invention discloses a publish-subscribe matching method based on a demand management tree model, the method comprises the following contents: 1, customizing a content label specification of an information product, and processing newly produced information products through the content label specification; 2, building a center directory database based on the demand management tree model, and summarizing subscription demands of all users; 3, realizing inquiry to the center directory database through content labels, and acquiring a to-be-sent subscriber list. The method provided by the invention provides a concentrated publish-subscribe implementation thinking and can easily implement management and user subscription of massive published themes, and processing modes are manageable, controllable and expandable. Compared with a conventional relational database, the method provided by the invention improves access efficiency of one order of magnitude and realizes effective consideration of both matching complexity and matching efficiency. A unified content label specification provided by the method can be used for unified management of various information based on content, and the method has better standardized generalization conditions.

A system and method is described for manipulating a plurality of discrete objects in a graphics application, the method comprising generating a set of coordinates for each discrete object, each discrete object bound by at least a horizontal boundary guide and a vertical boundary guide, selecting the boundary guide bounding one of the plurality of discrete objects intended for manipulation, rendering a feedback guide responsive to the selecting, dragging the feedback guide to a final location, and resizing the one of the plurality of discrete objects intended for manipulation and others of the plurality of discrete objects that have the boundary guide sharing an axis with the selected feedback slice guide responsive to the final location.

The invention discloses a micro big dipper satellite navigation anti-interference array signal processing board card and an anti-interference processing method thereof. The board card comprises an analog-to-digital conversion module, an anti-interference processing module, a digital analog conversion module, a clock distribution module and a power supply module, wherein the analog-to-digital conversion module is used for carrying out quantification processing on a received simulation intermediate frequency signal, the anti-interference processing module is used for carrying out digital bandpass filtering and digital down conversion processing on N paths of digital intermediate frequency signals outputted by the analog-to-digital conversion module to form N paths of complex base-band signals, anti-interference filtering for the N paths of complex base-band signals is carried out according to an anti-interference algorithm to acquire digital intermediate frequency signals after anti-interference processing, the digital analog conversion module is used for converting the digital intermediate frequency signals outputted by the anti-interference processing module into simulation intermediate frequency signals, and the simulation intermediate frequency signals are outputted to a front radio frequency module. The board card is advantaged in that, a system framework is simplified, system complexity is reduced, power consumption is reduced, system dimensions decrease, and cost is reduced.

The present invention discloses a method of large-scale MIMO linear iterative detection under non-ideal channel. The method utilizes the incomplete Cholesky decomposition as the preprocessing part of the conjugate gradient iteration, combining the advantages of the two, so that the problem of reduced rate of convergence in the traditional conjugate gradient algorithm under non-ideal channel or in a expanded system.Furthermore, a dynamic threshold based on channel correlation coefficient and system scale is proposed as an important parameter of preprocessing, which makes the solution of the whole system well balanced between complexity and performance.

The invention relates to a joint pre-coding and power control method for a multi-antenna cellular network, and belongs to the field of multi-antenna transmission of wireless mobile communication. The method is suitable for a multiple input single output cellular network, solves the problems that a cell edge user cannot be well scheduled and transmission efficiency is low in the conventional scheduling method and the problem of a relationship among performance, fairness and complexity, and comprises the following steps of: initializing, scheduling a cooperative user, scheduling a non-cooperative user and transmitting. Multi-point cooperative transmission technology and a channel correlation scheduling algorithm are adopted, and a transmitted signal is pre-coded, so that the performance andcomplexity of a system are well considered, interference among cells is effectively inhibited, the performance of the cell edge user is improved, and high system capacity can be achieved on the premise that the complexity is low and the transmission rate of the cell edge user is ensured.

A soft symbol decoder for use in a multiple input multiple output (MIMO) and OFDM (orthogonal frequency division multiplexing) system. The decoder generates soft symbol values for a digital signal that represents a number of source bits. The source bits are transmitted as symbols in corresponding to points in a signaling constellation. Soft metrics are determined by searching for all possible multi-dimensional symbols that could have been transmitted. The method includes transmitting a sample of the multi-dimensional symbol using K transmit antennas. The multi-dimensional symbol is represent-able as a complex, K-dimensional vector x. Each vector component of vector x represents a signal transmitted with one of the K transmit antennas. After transmission through a communication channel, a sample corresponding to the transmitted sample is received. The received sample is represented by a complex, N-dimensional vector y, where N is the number of receive antennas in the MIMO system. After the sample is received, a soft metric L(bi) is determined for each bit bi encoded by x according to the equation: L⁡(bi)=σ-2·(minxj|bi=-1⁢y-Hxj2-minxj|bi=+1⁢y-Hxj2),,and⁢ ⁢xjrepresents all possible values for x. In addition, a reduced complexity method is used for providing soft metric values in the MIMO system. This exemplary aspect reduces the complexity of the above computations from 2BK to 2B(K−1), where B is the number of bits transmitted per symbol per antenna.

The invention provides a method for transmitting high energy-efficient perceptual information based on LT code significance sampling in a cognitive radio wide band collaboration frequency spectrum perception network. Optimization degree distributed design based on LT code significance sampling is adopted to perform channel coding for perceptual information, so that the calculation complexity is lowered, the system performance is better optimized, and energy consumed during transmission process is effectively saved while the reliability of transmission of perceptual information is ensured; if a perceptual node is far away from a center node, a single-hop decoding forwarding relay method is adopted, so that the transmission energy consumption is further reduced; degree distribution optimization is adopted to select degree value to obtain a probability optimization value, corresponding optimization degree distributed design is obtained based on a robust solitary wave distribution function, and finally, normalization is performed on the designed optimization degree distribution to obtain a practical degree distribution. MATLAB simulation experiment proves that the method, compared with the conventional degree distribution, is improved in performance.

The invention discloses an equipment fault defect diagnosis method based on an improved U-Net neural network. The method comprises the following steps: constructing an improved U-Net network model which contains five down-sampling network layers and five up-sampling network layers and has triple constraints; wherein the triple constraints include three-level loss constraints on a fifth upsamplingnetwork layer located at the bottommost layer, two-level loss constraints on a fourth upsampling network layer adjacent to the fifth upsampling network layer and one-level loss constraints on a firstupsampling network layer located at the topmost layer. According to the invention, defect crack position and shape prediction and generation are carried out on an original image by using an improved U-Net neural network model; 3D display interaction is carried out through a WebGL method, the precision and correctness of equipment appearance crack pixel-level prediction are further improved, meanwhile, the picture experience feeling of man-machine interaction is remarkably improved, effective recognition and precise positioning of the equipment appearance defect crack position are facilitated,and the maintenance cost is reduced.

A cargo bar for retaining loads in a cargo container having opposing side walls. The cargo bar includes telescoping sections and end devices at the opposed ends of the cargo bar. The end devices are elastameric and absorb excessive forces that induce pressure grip extension of the telescoping sections.

The invention discloses a method for optimizing the magnetic suspension permanent magnet planar motor magnetic steel array parameter. An average fundamental wave amplitude is used for setting the expected gas flux density, and a mathematic model of the expected gas flux density is set up; average fundamental wave amplitudes on different levels are used for calculating the expected flux density overall average fundamental wave amplitude in an effective magnetic field space height range, and a gas flux density harmonic model is used for calculating the average relative mean square error of the practical flux density and the expected gas flux density; the magnetic steel parameter is determined based on the principle that the expected flux density overall average fundamental wave amplitude should be as large as possible, and the average relative mean square error of the practical flux density should be as small as possible, an optimizing result can effectively restrain higher harmonics, and especially, second harmonics are restrained greatly.

The invention relates to a method and an apparatus for producing multicoloured concrete blocks, in which coloured concrete mortar is poured from a silo into a receiving space of a filling carriage, the filling carriage is traversed across a moulding tool for the concrete blocks, and the moulding tool is filled with concrete mortar from the filling carriage, after which the filling carriage is returned and the concrete mortar located in the moulding tool is compacted, differently coloured concrete mortar being poured into at least one additional receiving space of the filling carriage and being introduced into the moulding tool via at least one distributing roller rotationally driven in accordance with a predetermined discharge.

The invention discloses an intelligent fuel oil pump with a metering control function. The intelligent fuel oil pump comprises an intelligent control unit, a servo motor, a gear pump, a differential pressure scanning measuring device, a differential pressure sensor and an oil path selection control valve, wherein the differential pressure scanning measuring device is located at the outlet of the gear pump, a throttling opening with a proper flow area is gated according to the flow range, and relative high flow measurement sensitivity is achieved while the relative low differential pressure isguaranteed; the intelligent control unit converts the differential pressure into the real-time flow, and the rotating speed of the servo motor is controlled according to the deviation between the expected flow and the real-time flow, so that the required fuel oil amount is pumped out by the gear pump; and the oil path selection control valve is used for gating a main oil path and an auxiliary oilpath of a fuel oil nozzle, so that the oil supply requirement of less flow in the engine starting process is met. According to the intelligent fuel oil pump with the metering control function, the fuel oil can be supplied as needed, the intelligent fuel oil pump has the advantages of being high in metering precision, small in pressure loss, compact in structure and convenient and fast to use, andcan be conveniently used for fuel oil control of an aero-engine and a gas turbine.

The invention provides a target user obtaining method, a device and a server. The method includes obtaining a user label directed graph, wherein the user label directed graph takes a label held by a user as a vertex, so that a directed line segment of a first label pointing to a second label indicates a probability that a user holding the first label simultaneously holds the second label; the userlabel directed graph obtains a user label directed graph, and the user label directed graph obtains a user label directed graph. Acquiring an original identification directed graph corresponding to the user tag directed graph; The preset clustering algorithm updates the identification of each vertex in the original digraph iteratively, and records the identification update sequence of each vertexin the clustering process. A target us is acquired accord to that identification update sequence. The invention can provide a target crowd obtaining method capable of accurately locating a target crowd, simultaneously taking into account complexity and not limited to the number of original users of a tag, and the target user obtaining method has good accuracy.

The invention relates to a data communication method, a data communication device and a base station. The data communication method comprises the steps of determining the cascading number N of OFDM (Orthogonal Frequency Division Multiplexing) symbols according to the coverage, the receiver processing performance and the current sub-carrier spacing, wherein the N is a positive integer; determining the length of a cyclic prefix corresponding to the current sub-carrier spacing according to the current sub-carrier spacing and the cascading number N of the OFDM symbols; and sending the cascading number N of the OFDM symbols and the length of the cyclic prefix to a user terminal so as to enable an OFDM sequence adopted in performing communication with the user terminal to contain N OFDM symbols and a single cyclic prefix. The technical scheme improves the data transmission efficiency.

The invention discloses an unmanned aerial vehicle multi-protocol transmission data analysis method, which can complete dynamic multi-protocol data analysis under the conditions of not changing programs and not increasing extra transmission data. According to the method, a text protocol file is read mainly through control software during running, and an unmanned aerial vehicle transmission protocol is automatically obtained. Control software uses a unified data structure to store transport protocols and real-time data. When an unmanned aerial vehicle system modifies the transmission protocol,only the text protocol file needs to be modified, and control software does not need to be modified. In the research, development and upgrading process of the unmanned aerial vehicle, the method can be used to reduce a large amount of work caused by transmission protocol change and improve the flexibility and maintainability of the unmanned aerial vehicle system under the condition of not changingthe transmission mode of the system and not reducing the transmission efficiency.

The invention discloses a multi-scale new energy power station output joint prediction method based on a plateau mountain multi-model area. The method comprises the following steps: S1, establishing a wind energy joint prediction basic model; s2, selecting a feature day which is the same as or similar to the weather state of the prediction day based on the four-dimensional features; s3, establishing a characteristic day turbulence prediction model based on the characteristic day and the wind energy prediction basic model; and S4, performing new energy power station output joint prediction based on the characteristic daily turbulence prediction model. The invention further discloses a corresponding prediction system, electronic equipment and a computer readable storage medium, wind energy prediction is subjected to joint or coordinated prediction according to geographical and meteorological influence factors, coupling is analyzed, respective input quantities and coupling characteristics are determined, model complexity and generalization ability are taken into consideration, and the prediction efficiency is improved. And automatically selecting the date with the highest similarity with the weather condition of the prediction day as a feature day, and training the prediction model by taking the meteorological data and the output power data of the feature day as training samples so as to obtain relatively high prediction precision.