328 results about "Wave trough" patented technology

The invention relates to the technical field of tumble prediction, in particular to a tumor patient tumble prediction system based on machine learning, which comprises a stride frequency recognition module, a physiological fluctuation monitoring module, a gait coupling judgment module, a posture analysis module and a risk output regulation and control module. According to the method, by accurately positioning the wave crests and the wave troughs in the acceleration signal period and analyzing the frequency change direction of the adjacent sections, accurate marking of the mutation sections is achieved, the sensitive capture capacity of behavior state changes is effectively improved, and the synchronous extraction mode of the mutation sections and the physiological signals is improved. Through consistency comparison of attitude angle change and gravity center track direction, accuracy of motion structure abnormity and imbalance state identification is enhanced, pressure distribution and spine compression direction are extracted, corresponding pairing between structure pressure and physiological load is realized, optimization of time sequence integrity is realized, and accuracy of motion structure abnormity and imbalance state identification is improved. And multi-dimensional data fusion analysis has high pertinence and stability.

The invention provides a three-dimensional skin waviness fitting analysis method. The method comprises the following steps: performing boundary analysis on skin point cloud data obtained by laser measurement, performing interpolation sampling from the point cloud data according to a specified area and resolution to obtain point cloud coordinates which can reflect the real condition of the skin and are regularly arranged, performing bicubic spline surface least square approximation based on a sampling point set, and calculating the skin point cloud data according to the bicubic spline surface least square approximation. The method comprises the following steps: acquiring a reference curved surface reflecting the overall distribution trend of an analysis area, calculating distance deviation from a sampling point to the reference curved surface, carrying out filtering smoothing processing, forming a smooth deviation curved surface capable of reflecting the deviation condition of a measurement curved surface, extracting information such as wave crest and wave trough positions, wave amplitude, wavelength and slope in the deviation curved surface, and carrying out skin waviness characteristic analysis. According to the method, the tiny waviness characteristics of the irregular curvature surface of the aircraft can be extracted, the skin waviness distribution condition can be visually displayed, and the method has the advantages of being wide in applicability, small in error, high in reliability, low in time cost and the like.

The utility model discloses a metal belt material and a honeycomb heating body with the same, and the metal belt material comprises a characteristic belt which is provided with a plurality of wave crest parts and wave trough parts, the wave crest parts and the wave trough parts are alternately arranged, first fire holes are formed between the adjacent wave crest parts, and second fire holes are formed between the adjacent wave trough parts; the partition structure comprises a first partition piece and / or a second partition piece, the first partition piece is arranged at the lower end of each first fire hole, and the first partition piece divides the lower end of each first fire hole into at least two small holes; a second partition piece is arranged at the lower end of each second fire hole and divides the lower end of each second fire hole into at least two small holes. The burner is simple in structure, convenient to manufacture, high in porosity and capable of reducing the tempering probability and improving the heat intensity of the fire holes.

The invention provides an aviation nacelle part waviness automatic detection and evaluation method, and belongs to the field of product production detection, and the method comprises the steps: carrying out the protocol scanning of part surface contour features, and obtaining the undistorted coordinate point discrete point cloud data of the actual surface contour; filtering the point cloud data; obtaining a piece of flattened deviation value discrete point cloud data; obtaining a flattened deviation value continuous curve by adopting a general standard curve reduction method; extracting waviness components, and obtaining a curve center line; obtaining a crest value and a trough value participating in calculation; and calculating the maximum wave amplitude, the waviness and the slope for evaluating the waviness by using the wave peak value and the wave trough value. According to the method, the relation between the minimum cut-off wavelength of the waviness and the sampling interval is stipulated, the undistorted reduction of the surface profile curve is ensured, the influence of non-waviness profile components in the digital evaluation of the waviness is eliminated through a combined calculation method, and the evaluation accuracy of the waviness of the aviation nacelle part is improved.

The invention belongs to the technical field of spectral analysis, and particularly discloses a Raman spectrum baseline correction method, device and system, a medium and equipment, and the method comprises the steps: obtaining a to-be-processed original Raman spectrum, recognizing trough points of the original Raman spectrum, and screening the recognized trough points to obtain baseline trough points; fitting the base line wave trough points to obtain a Raman spectrum base line; and correcting the Raman spectrum baseline to obtain a corrected Raman spectrum. Through multi-stage trough point screening and adaptive fitting, background interference can be effectively eliminated, and the signal-to-noise ratio and the characteristic peak fidelity of the Raman spectrum can be improved.

The utility model discloses a metal belt material and a honeycomb heating body thereof, the metal belt material comprises: a characteristic belt, which is provided with a plurality of wave crest parts and wave trough parts arranged alternately, fire holes are formed between adjacent wave crest parts, and fire holes are formed between adjacent wave trough parts; the lower end of the characteristic belt is connected with the vertically-arranged separation belt, the separation belt transversely penetrates through each wave crest part, each wave trough part and each fire hole, and the lower end of each fire hole is divided into at least two small holes by the separation belt. The metal belt material is simple in structure, high in porosity and capable of reducing the tempering probability and improving the heat intensity of area fire holes.

The invention discloses a physical layer key generation method, system, equipment and medium adopting a fuzzy extractor, and aims to improve the consistency rate of physical layer keys generated by two communication parties on the premise of ensuring the key generation rate. The two communication parties obtain consistent channel characteristic parameters; compared with a traditional double-threshold quantization method, the double-threshold quantization method for removing wave crest and wave trough values is adopted, and the consistency of quantization results of the two communication parties is improved; a Level-Crossing key agreement algorithm is utilized, so that two communication parties obtain a random source information sequence with a relatively high consistency rate, and meanwhile, the key generation rate is ensured; the fuzzy extractor is introduced to solve the problem that the two communication parties cannot accurately transmit the physical layer key when the random source information is not completely consistent, so that the success rate of key generation is greatly improved, and the security of key transmission of the two communication parties is ensured. The invention belongs to the technical field of secret communication.

The invention relates to the technical field of charge state analysis, in particular to a charge state evaluation method for a digital power grid. Determining abnormal wave crest points according to data fluctuation characteristics of the wave crest points in the current curve graph; obtaining an interference degree and a current abnormal point according to the distance characteristic of the abnormal wave crest point and the data change characteristic between the abnormal wave crest point and the adjacent wave trough point; obtaining a current abnormal change sequence according to the data difference between the adjacent current abnormal points; obtaining a temperature change characteristic sequence according to the temperature curve graph; obtaining a similarity degree according to the current abnormal change sequence and the temperature change feature sequence; and obtaining an adjustment coefficient according to the similarity degree, the distance feature of the current abnormal point closest to the current moment and the interference degree. The preset coulombic efficiency is adjusted according to the adjustment coefficient to obtain the self-adaptive coulombic efficiency, the charge state value of the next moment is calculated, and the calculation accuracy of the charge state is improved.

The invention relates to an ultrahigh-temperature-resistant radio-frequency coaxial cable and a manufacturing method thereof. The cable comprises an inner conductor, an insulating foaming layer, a first outer conductor, a glass fiber belt, a silicon dioxide aerogel coating, a second outer conductor, a flame-retardant fireproof layer and a flame-retardant sheath layer which are sequentially arranged from inside to outside, wherein the first outer conductor is provided with a first embossing structure comprising wave crests and wave troughs; the second outer conductor is provided with a second embossing structure comprising wave crests and wave troughs; the positions of wave crests and wave troughs of the first embossed structure are consistent with the positions of corresponding wave crests and wave troughs of the second embossed structure, and air layers are formed between the first embossed structure and the glass fiber belt and between the second embossed structure and the silicon dioxide aerogel coating. According to the invention, the safety and reliability of the cable in extreme environments such as fire disasters and the like are remarkably improved, and communication interruption of the radio frequency coaxial cable in high-temperature environments of fire disasters is avoided.

The utility model provides a dust cover, drive subassembly and vehicle, dust cover includes cover body, major diameter end connecting edge and minor diameter end connecting edge, major diameter end connecting edge and minor diameter end connecting edge are respectively connected to the both ends of cover body, the cover body along the axial direction includes a plurality of wave crest structure and wave trough structure that alternate connection in proper order, the wave crest structure is provided with a large-diameter end wave crest face facing the large-diameter end connecting edge and a small-diameter end wave crest face facing the small-diameter end connecting edge, and at least one of the large-diameter end wave crest face and the small-diameter end wave crest face is provided with a drainage groove. The drainage grooves extend from the positions close to the trough structures to the positions away from the trough structures. According to the dustproof cover, the contact area and the water amount between the two adjacent wave crest structures are reduced, so that the siphonic effect and the stick-slip effect between the two adjacent wave crest structures are reduced, and the periodic abnormal sound of a vehicle in the large-angle steering process is relieved or eliminated.

The invention discloses a soil wind erosion treatment device which comprises a wavy grid structure, and the wavy grid structure is of a wavy three-dimensional structure formed by plastic sheets and is composed of a plurality of wave crest parts, a plurality of wave trough parts and grid units evenly distributed between the wave crest parts and the wave trough parts. A biomass rope is wound on the outer side of the trough part; the whole wavy grid structure is made of a plastic material with heat conductivity and an electrostatic adsorption function; the wave-shaped grid structure is fixed to the ground through anchoring inhaul cables. The whole soil wind erosion treatment device can be laid in a modularized mode, the wave crest arrangement direction and the anchoring point density are optimized according to the wind erosion terrain and the wind direction, and the soil wind erosion treatment device is suitable for wind erosion sensitive areas in arid and semi-arid areas. In practical application, the device can effectively relieve direct scouring of strong wind to surface sand grains, meanwhile, condensation, water catchment and sand stabilization are induced through the structure of the device, the ecological vegetation restoration process is gradually introduced, and the device has the ecological property and engineering property.

The invention discloses a corrugated plate depth detection method based on a three-dimensional point cloud of laser scanning. The method comprises the following steps: forming a depth detection device by using a mechanical arm, a sliding rail and linear structure laser, and carrying out parallel calibration; calculating the noise level according to the 2D point cloud obtained by the line laser sensor, and respectively searching the optimal scanning poses in the X and Y directions; according to the obtained corrugated plate point clouds, extracting the curvature of the point clouds and setting a threshold value, and taking the point clouds greater than the threshold value as wave crests and wave troughs; according to a DBSCAN point cloud clustering algorithm, the obtained wave crests and wave troughs are clustered, and then the clusters are sorted; fitting adjacent clusters and optimizing planes according to an RANSC plane fitting algorithm and a plane optimization algorithm; and according to a point-to-plane distance formula, calculating the distance between the wave crest and wave trough points and the corresponding plane. According to the method, through the designed scanning device, the optimal scanning pose can be obtained through automatic adjustment, and the distance between the wave crest and the wave trough is measured more accurately by adopting a mode of firstly fitting and then optimizing.

A method and system for analyzing the press-fitting curve of American standard wheelset includes: acquiring American standard wheelset parameters, press-fitting parameters and pressure data, and establishing a wheelset press-fitting curve; acquiring a plurality of judgment items on the established curve, and analyzing the acquired judgment items according to a preset algorithm to obtain an analysis result, which can analyze all the curves of the end points, wave peaks, wave troughs, ascending and descending sections of the wheelset press-fitting curve. The method is simple to operate and convenient to use, and can automatically and accurately determine whether the curve meets the requirements. At the same time, the identification and determination of unqualified items of the curve provide a basis for the quality improvement of the subsequent press-fitting process, which promotes the quality improvement of wheelset press-fitting, avoids product repair, and further improves the press-fitting efficiency.

The embodiment of the invention provides a sea wave height determination method and device, a storage medium and electronic equipment, and the method comprises the steps: segmenting target point cloud data into a plurality of time sequence frames, and determining a wave crest region and a wave trough region of sea waves according to a local extreme point in the target point cloud data, each time sequence frame is used for indicating the sea surface shape at each moment; according to the wave crest area, the wave trough area and the multiple time sequence frames, a target sea wave contour model is fitted, and the target sea wave contour model is used for indicating the sea wave height and the three-dimensional shape of the sea wave at each time point; and determining the sea wave height at any time point based on the target sea wave contour model. According to the method, the problem that high-precision sea wave height data cannot be provided under complex sea conditions such as high storm waves and changeable tides in the prior art can be solved.

A method for inverting the thickness of a cased well microring comprises the steps that post-casing scanning imaging logging, CBL / VDL logging and borehole diameter logging are conducted in a depth interval, wave crests and wave troughs of direct bending type Lamb waves received by far and near receivers in 36 directions of post-casing scanning imaging logging of each depth point are extracted, the thickness of a cement annulus is obtained according to the borehole diameter and the outer diameter of a casing, and the thickness of the cement annulus is calculated according to the thickness of the cement annulus. According to the thickness of the annulus and reflected wave arrival time in far and near waveforms recorded by post-casing scanning imaging logging, the shear wave speed of cement is estimated, and according to the shear wave speed and the shear wave speed of the cement, the relation between the thickness of the micro-ring and the attenuation difference value when the micro-ring and the cementing are good is established through an analytical calculation method. And according to the attenuation difference value, the accurate fluid micro-ring thickness of the processing interval can be obtained through inversion. By combining post-casing scanning imaging logging and CBL / VDL logging information, the accurate micro-ring thickness between the casing and the cement interface is accurately calculated, evaluation of the cased well cementation quality and the cement packing capacity is achieved, the defect that the micro-ring cannot be judged only by means of an acoustic amplitude curve is overcome, and the accuracy of well cementation is improved. And important technical support is provided for safe development and production of an oil field.

The invention relates to the technical field of filters, and provides a filter for an automobile air conditioner, the filter for the automobile air conditioner comprises a frame and filter cloth, the filter cloth is arranged in the frame, the outer surface of the filter cloth comprises an air inlet surface and an air outlet surface which are connected, the air inlet surface is in a wrinkle shape and comprises a plurality of wave crest sections and a plurality of wave trough sections, the plurality of wave crest sections and the plurality of wave trough sections are connected and alternately arranged, and the top points of the adjacent wave crest sections and the bottom points of the adjacent wave trough sections can be close to or far away from each other in the arrangement direction of the wave crest sections and the wave trough sections, so that the air inlet surface is correspondingly folded or unfolded. The filter cloth can be adaptively adjusted according to the actual density condition of impurities, and the adaptability of the filter for the automobile air conditioner is improved.

The invention relates to the technical field of electric energy conversion, and discloses a high-frequency resonant topology-driven isolation power conversion system, which comprises a power conversion circuit, a driving unit, a feature sensing unit and a logic regulation and control unit, and is characterized in that the logic regulation and control unit extracts a parasitic ringing extreme point of a voltage evolution waveform in dead time; a charge release balance point is determined by calculating an arithmetic mean value of the first wave crest and the first wave trough, and high-frequency parasitic parameter interference is stripped; and predicting a time domain window of a return-to-zero potential based on a charge release balance point, performing phase compensation on a driving pulse in the time domain window according to a voltage waveform second derivative feature, and locking the starting moment of a switching tube at a zero voltage point. Interference of high-frequency distribution electromagnetic parameters on conduction judgment is eliminated, and soft switching self-healing in a full-load domain is achieved.

The invention belongs to the technical field of green buildings, and particularly relates to a passive energy-saving building facade sine wave flow guide outer envelope system which comprises an outer facade assembly, the outer facade assembly comprises sine wave flow guide mechanisms and an outer curtain wall which are alternately arranged from top to bottom, and each sine wave flow guide mechanism is of a wavy ridge structure and internally provided with a containing cavity; the wind turbine generator is mounted in the accommodating cavity; wherein the wave trough of the upper top surface and / or the wave crest of the lower bottom surface of the sine wave diversion mechanism are / is provided with a gas collection port, and the outer surface is provided with a vent hole. The device can gather, guide and discharge a natural wind field, improves the capturing efficiency of wind energy, can adapt to airflow in different directions, enables a wind turbine generator to be installed in a hidden mode, does not affect the building facade effect, can be flexibly arranged, can adapt to complex and changeable wind direction conditions, improves the stability and reliability of wind energy utilization, and is suitable for popularization and application. And airflow power can be continuously generated in windless weather, the problem of insufficient wind power is effectively solved, and continuity and stability of building energy supply are ensured.

The invention discloses a seismic signal recovery method and device, equipment and a medium. The method comprises the following steps: performing forward modeling on logging data of a target reservoir to determine a target seismic waveform of the target reservoir; wherein the target seismic waveform is a waveform enabling the target reservoir to present wave crest reflection or wave trough reflection; determining a target horizon corresponding to the target seismic waveform according to the target seismic waveform; and tracking the target horizon, and performing energy enhancement on the seismic waveform to be adjusted in the target horizon to obtain a post-stack recovery seismic data volume. According to the technical scheme, the weak seismic signal in the reservoir is enhanced, the influence of the main contribution waveform of the reservoir reflection characteristics on the weak seismic signal is fully considered through logging forward modeling analysis, and the seismic signal recovery accuracy is improved.

The present invention relates to the field of filter technology and provides a filter for an automotive air conditioning system. The filter comprises a frame and a filter cloth, the filter cloth being disposed within the frame and having an outer surface comprising an air inlet surface and an air outlet surface connected thereto. The air inlet surface is pleated and includes a plurality of wave crests and a plurality of wave troughs, the plurality of wave crests and a plurality of wave troughs being connected and arranged alternately. Along the arrangement direction of the wave crests and troughs, the apex of adjacent wave crests and the base of adjacent wave troughs can be brought closer or further apart, thereby causing the air inlet surface to fold or unfold accordingly. The present invention enables the filter cloth to be adaptively adjusted according to the actual density of impurities, thereby improving the adaptability of the automotive air conditioning filter.

The invention discloses an aircraft surface waviness measurement and analysis method and system, and the method comprises the steps: scanning the surface of an aircraft according to a planned path through employing a three-coordinate measuring machine and a scanning probe, obtaining scanning data, and obtaining the scanning data for evaluation through employing a segmented scanning and segment-to-segment direct splicing mode for a hole, a pin and other structural parts; fitting based on scanning data to obtain a point deviation data set, calculating corresponding point arc length data based on the point deviation data and the point coordinate data on this basis, and drawing a graph by taking a horizontal axis as the point arc length data and a longitudinal axis as the point deviation data; and determining the surface waviness of the airplane by combining the derivative at the intersection point of the point deviation data curve and the transverse axis and the distance between the wave crest and the wave trough, thereby realizing the efficient and accurate measurement of cavities, welding seams and other obstacle structures on the outer surface of a large-scale airplane part or the whole machine and the accurate calculation of the waviness.

The invention discloses a stator slotting type non-uniform tooth bilateral permanent magnet vernier motor and a modeling method thereof, a rotor adopts a U-shaped consequent pole permanent magnet topological structure, stator permanent magnets adopt a trapezoidal permanent magnet topological structure, stator teeth adopt split tooth structures, and the stator teeth are designed in a non-uniform distribution manner. The split teeth at the tail ends of the stator teeth are provided with small grooves with specific structures; the amplitude and the phase of the air gap flux density harmonic wave are changed by changing the wave crest and the wave trough of the stator magnetic conductance. Aiming at a wave crest of stator magnetic conductance, stator teeth are subjected to slotting design, the amplitude of air gap flux density is changed, the torque pulsation of the motor is greatly reduced, and the high torque performance of the motor is maintained; aiming at a stator magnetic conductance trough, the phase of air gap flux density is changed through non-uniform distribution of stator teeth, so that the torque is improved. The above two act on stator magnetic conductance together, so that the motor has the characteristics of high torque density and low torque pulsation.

The present application relates to the technical field of oil reservoir exploration, and particularly relates to a fracture-cave seismic facies identification method and device, which comprises the following steps: obtaining each reservoir section range of a fracture-cave reservoir; obtaining the seismic reflection energy intensity of each reservoir section of the fracture-cave reservoir; obtaining the seismic waveform characteristics of each reservoir section, wherein the seismic waveform characteristics are any one of the following: a first type of seismic waveform with both wave peaks and wave troughs, and a second type of seismic waveform with only wave peaks or only wave troughs; determining the seismic facies category of each reservoir section of the fracture-cave reservoir based on the seismic waveform characteristics and the seismic reflection energy intensity, thereby providing an important basis for the exploration and development of the carbonate rock fracture-cave oil reservoir through effective identification of the seismic facies.

The invention belongs to the technical field of net mold frames for hollow internal mold metal net cement partition walls, and discloses a net mold frame for a hollow internal mold metal net cement partition wall and a method for building the hollow internal mold metal net cement partition wall. The main technical characteristics are as follows: two opposite wave-shaped meshes are included, wave troughs of the two meshes are attached together, wave crests of the two meshes are opposite, a cavity is formed between the wave crests of the two meshes, vertical keels are arranged in the cavity, the vertical keels are bound and fixed with the meshes, and the vertical keels are arranged in the cavity. Vertical supporting frames are arranged at the wave trough positions of the two meshes, and the vertical supporting frames are fixed to the meshes. The upper embedded steel bars and the lower embedded steel bars are connected together through the vertical supporting frames, the vertical supporting frames are arranged at intervals, and the anti-collision performance and the anti-seismic performance of the wall are greatly improved.

The invention discloses a rolling force calculation method for longitudinal wave rolling of a metal plate, and relates to the technical field of rolling. The rolling force calculation method for longitudinal wave rolling of the metal plate comprises the steps that based on rolling parameters of longitudinal wave rolling equipment and a neutral angle in the rolling process of the longitudinal wave rolling equipment, plastic deformation area rolling force at the wave trough position and the wave waist position of the longitudinal wave rolling equipment is determined; and the total rolling force of the plastic deformation area of the longitudinal wave rolling equipment is determined according to the rolling force of the plastic deformation area at the wave trough and the wave waist of the longitudinal wave rolling equipment. Accurate calculation of the total rolling force of the plastic deformation area is achieved, and the calculation efficiency of the rolling force is improved.

The present invention discloses a deep hole rifling depth detection method, comprising the following steps: Step 1: Acquiring measurement data: 11) Installing a spectral confocal displacement sensor on a mounting shaft parallel to the axis of a pipe to be tested, so that the spectral confocal displacement sensor is extended into a set position of the pipe to be tested, and then keeping the spectral confocal displacement sensor stationary and the axial speed of the pipe to be tested zero; 12) Driving the pipe to be tested to rotate around the mounting shaft at a uniform speed for one circle. During the rotation of the pipe to be tested, the spectral confocal displacement sensor is used to measure the inner wall of the pipe to be tested, and a curve reflecting the change of the distance between the inner wall of the pipe to be tested and the spectral confocal displacement sensor over time is obtained; Step 2: Acquiring the rifling depth: Fitting all wave crest segments into a first sine curve, and fitting all wave trough segments into a second sine curve, then the rifling depth is obtained: #imgabs0#, #imgabs1# and #imgabs2# respectively represent the offset distances of the first sine curve and the second sine curve.

The invention relates to the technical field of traffic congestion identification, in particular to a traffic network congestion identification method based on data fusion. The method comprises the steps that a speed sequence is obtained, and then a emphasized analysis sequence is obtained; wave trough credibility and wave crest credibility are obtained, and credible wave trough points and credible wave crest points are obtained; obtaining a sampling mean value according to the credible wave trough point and the credible wave crest point, and further calculating the credibility of the emphasized analysis sequence; calculating the stability and turning point probability of each data point in the emphasis analysis sequence, and screening the data points to obtain key points; obtaining a contrast sequence pair, respectively calculating the stability degree of each sequence in the contrast sequence pair, selecting the sequence with the high stability degree as the contrast sequence, and obtaining the confidence coefficient of each emphasized analysis sequence; obtaining a self-adaptive weight according to the confidence coefficient and the credibility of the emphasized analysis sequence; and obtaining the vehicle passing speed in the time period according to the adaptive weight, and carrying out congestion identification. According to the invention, the accuracy of traffic jam identification can be improved.

The application provides an ultrasonic fingerprint readout circuit, an ultrasonic fingerprint chip and an ultrasonic fingerprint module. The ultrasonic fingerprint readout circuit comprises a sensing circuit, a single-ended-to-dual-ended circuit and a bidirectional integration circuit which are coupled in sequence. Compared with a conventional ultrasonic fingerprint readout circuit, two noise sources are saved, bidirectional integration (integration from a wave peak to a wave trough and from a wave trough to a wave peak) is realized through a differential working mode, the output signal quantity is doubled, the output noise is reduced, the signal-to-noise ratio is greatly improved, the anti-interference capability is better, and the additional circuit cost is not increased too much.