122 results about "Cut off point" patented technology

The invention belongs to the field of computer aided manufacturing and numerical control machining and specifically relates to a curve fitting method for ensuring global G2 continuity of a tool path.The method comprises the following steps: to begin with, establishing a fitting curve in a piecewise manner according to the discrete tool path; then, carrying out spline screening to determine splines needing bridging processing; cutting off the splines participating in bridging processing; and finally, establishing a B spline having five control points as a bridging curve c(t) between the two cut-off points. By controlling data point error between the bridging curve c (t) and a given data point Q, it is ensured that the bridging curve meets machining error; by controlling shape maintenance constraint conditions of the bridging curve, the bridging curve meeting fairness requirements is obtained; and finally, a curve having global G2 continuity and meeting machining error requirements andfairness requirements is established. The method can ensure G2 continuity of joints of the splines, constructs the spline curve having global G2 continuity and enables a numerical control processing product to have higher precision and better machining quality.

The invention provides a method and system for detecting the blocking of microphone sound holes. The method comprises the steps that an intelligent terminal storage user issues a voice signal with a preset time length, and detects the high frequency cut-off point Fh' of the voice signal; the absolute value of the difference between the high frequency cut-off point Fh' and the preset standard high frequency cut-off point Fh, and the case whether or not the absolute value of the difference is greater than the preset difference threshold value DeltaF is evaluated; when the absolute value of the difference is greater than the preset difference threshold value DeltaF, the user is reminded that the sound hole of the microphone is blocked. The method is simple and convenient, can detect in real time whether or not the sound test holes of the microphone in the intelligent terminal are blocked, to make it easy for users to find the problem that the sound holes of the microphone are blocked, and avoid the poor call quality disturbances and inconveniences caused by the described problems.

The invention discloses a power distribution network load flow calculation method based on a PV node-looped network comprehensive compensation matrix. On the basis of the PV node-looped network comprehensive compensation matrix put forward according to the Kirchhoff law, various impedances of PV nodes are determined according to the fact that the PV nodes take the load flow one-direction performance into consideration; for a looped network, through current compensation of the looped network, voltages of cut-off points of the looped network are kept the same. The problem that because influences of particularity of DG nodes and operation of a weak looped network can not be taken into comprehensive consideration with an existing power distribution network load flow calculation method, the method is out of operation is solved, the method is effective for power distribution network load flow calculation containing various distributed power sources and having a looped network, and the method is ingenious in idea and has good application prospects.

The invention discloses a vehicle route selection method under a traffic overflow state. The method comprises the following steps: planning a shortest route for vehicle driving in a road network under a state that the start point and the destination have been known; when overflow is detected in a certain cross, inquiring a road attribute table to obtain the wave speed of stop wave in the road direction; calculating and finding the overflow cut-off point, namely the cross node between diffused overflow and planned route, according to a formula ([delta]t=T-T<omega>), judging whether the vehicle can successfully pass the overflow cut-off point or not, if the vehicle can pass the overflow cut-off point, the route does not need to be planned again, the driver can normally drive the vehicle according to the planned route; and planning a route again after a route planning algorithm is utilized to remove the overflow related sections in the road network until overflow does not influence the chosen route. The method guides a driver to drive a vehicle under a traffic jam state, and the static and dynamic route planning is very practical.

A banknote validation arranged to discriminate between real and false banknotes is described. The valuator comprises: a light source arranged to emit light in the non-visible spectrum onto a banknote being validated, the emitted light including an ultraviolet (1O nm to 400 nm) or intra red (800 run-1 00000 nm) wavelength of light; a broadband optical light sensor arranged to sense a relatively broad band of visible light spectrum wavelengths of light emitted by fluorescence from the banknote in response to the banknote being irradiated with the non-visible spectrum wavelengths of light; and an optical filter positioned between the banknote and the sensor and arranged to prevent illumination of the sensor with reflected or transmitted non-fluoresced light from the light source, the optical filter having a −3 db cut off point selected such that the light emitted from the light source, having a wavelength closest to the visible light spectrum wavelengths of light, is filtered.

The invention discloses a real-time exposure monitoring device used in the manufacture of a holographic grating, belongs to the field of spectral technologies, relates to a real-time exposure monitoring device, and aims at solving the technical problem of providing the real-time exposure monitoring device used in the manufacture of the holographic grating. With regard to the technical proposal, the monitoring device comprises a grating substrate, a latent image grating, a recording beam, an interference field, a photoelectric receiver, a recording laser, a plane mirror, a spatial filter, a collimating mirror, a regulating mirror, a monitoring laser, a data processing system and a display. The grating substrate coated with a photoresist is placed in the interference field and exposed to form the latent image grating on the surface of the grating substrate, and the monitoring laser irradiates the latent image grating, the photoelectric receiver is arranged in the diffracted light direction, and the diffracted light is processed by the data processing system and then transmitted to the display, and the exposure can be obtained from the change of the diffracted light displayed on the display. The monitoring device can rapidly and automatically control the exposure of the holographic grating, accurately determine the exposure cut-off point, and provide a basis for the exposure technology of the holographic grating.

The invention belongs to the field of electronic processing machinery, and specifically relates to an automatic terminal crimping machine of an RF antenna. The machine comprises a material belt, characterized in that the material belt comprises a material belt feeding segment, a material belt riveting segment, and a material belt discharging segment. The material belt discharging segment is connected with a material belt contact pin moving mechanism. The material belt riveting segment is connected with a terminal cutting and bending mechanism. The terminal cutting and bending mechanism is provided with a movable top block which cuts off material belt cut-off points and makes the integrated body formed by a terminal first part and a terminal third part bended. A U-shaped block which is used to clamp the terminals and can vertically move is arranged below the material belt riveting segment. The terminals of the material belt riveting segment hold wire heads. The terminal crimping machine is high in automation degree, and realizes firmly combination of terminals and wire heads.

The invention provides an array substrate cross curve repairing method, an array substrate and a liquid crystal display, relating to the field of preparation processes of liquid crystal display screens and solving the problem of scrapped array substrate caused by cross curves generated by a data line and a grid line on the array substrate. The array substrate cross curve repairing method comprises the steps of: respectively cutting off the short-circuited grid line on two sides of the short-circuited data line, cutting off the connection between source electrodes of a first thin film transistor and a second thin film transistor and the data line, wherein the first thin film transistor and the second thin film transistor are respectively arranged on two sides of the short-circuited data line, electric connection points of grid electrodes of the first thin film transistor and the second thin film transistor and the grid line are respectively positioned on two sides of two cutting off points; and respectively electrically connecting the grid electrodes of the first thin film transistor and the second thin film transistor with respective drain electrodes, electrically connecting pixel electrodes electrically connected with the two drain electrodes, and because the short-circuited position of the grid line and the data line is firstly cut off when poor conditions happen, constructing a new path according to the pixel electrodes for connecting the grid line so that the cross curves are repaired.

A leakage current detection circuit includes a driving voltage detection unit that detects a cut-off point of a driving voltage regulated through a driving voltage switch, a leakage current detection unit that detects a leakage current of the driving voltage switch after cutting off of the driving voltage, generates a leakage detection signal when a driving voltage related to the leakage current exceeds a reference detection voltage and a driving voltage control unit that turns off the driving voltage switch at a cut-off point of the driving voltage to cut off the driving voltage and maintain the driving voltage switch in an off state when the leakage detection signal is received. The leakage current detection circuit detects a leakage current passing through the driving voltage switch when abnormal operation of a light emitting diode light apparatus occurs, and keeps the driving voltage switch in an off state during cutoff periods to prevent burning of the drive voltage switch.

The invention discloses a correction method and device for a sensor characteristic curve, equipment and a storage medium. The method includes the following steps: obtaining sample point data of a sensor; determining a fitting straight line according to the sample point data; determining a starting point and a cut-off point of a linear interval of the sensor characteristic curve according to a deviation and a preset threshold of a current sample point and the fitting straight line and according to a preset sequence; and correcting the fitting straight line according to the sample point betweenthe starting point and the cut-off point to obtain a corrected sensor characteristic curve. The correction method and device can ensure the accuracy of the determined starting and cut-off points, andthen the characteristic curve is corrected according to the starting and cut-off points, and the corrected characteristic curve can more accurately represent sensor characteristics and provides more accurate reference data for sensor calibration.

The invention discloses an optical proximity correction method which is as follows: a photolithographic resolution limit table is established, and the photolithographic resolution limit table includes an exposable area and a non-exposable area; current layer and adjacent layer graphs are provided, and the current layer and adjacent layer graphs are overlapped to form an overlapping graph; a bad edge of the current layer graph is determined; cut-off points are added into the bad edge, the cut-off points are respectively located below or above a first adjacent layer sub graph, the bad edge part between the cut-off points is used as a first line segment, other bad edge part is used as a second line segment, and the second line segment is moved, so that a second width is formed between a second line segment relative edge in a first to-be-detected sub graph and the second line segment, a second distance is formed between the second line segment and an adjacent current layer sub graph, and the second width and the second distance are located in the exposable area in the photolithographic resolution limit table; and according to the length of the first line segment, the first line segment can be moved a corresponding distance. The influence on semiconductor device performances can be avoided.

The invention provides an electronic screen method full-automatic motor vehicle headlight detector and a detecting method and relates to the technical field of motor vehicle survey technology. The electronic screen method full-automatic motor vehicle headlight detector and the detecting method comprise a detector. A walking mechanism which is capable of driving the detector to move along the horizontal direction is arranged on the bottom of the detector. A simulation front electronic screen wall is arranged in front of the detector. A simulation back electronic screen wall is arranged at the back of the detector. The detector is perpendicular to a driving direction of a surveyed motor vehicle. Light beam deviation of the motor vehicle headlight is confirmed through a method of drawing a simulated screen cross curve on the simulation front electronic screen wall and the simulation back electronic screen wall. Light intensity and light spots on the motor vehicle headlight of the simulation front electronic screen wall and the simulation back electronic screen wall are collected and analyzed through the detector. Far and near light intensity of the motor vehicle headlight, passing light light and shade cut-off points, light beam deviation, height of light, a left and right symmetrical difference on the periphery of a car body are confirmed. The electronic screen method full-automatic motor vehicle headlight detector and the detecting method are suitable for the survey of the motor vehicle headlight of a motor vehicle check station, a motor vehicle producing factory and a motor vehicle light research unit. The detector system is stable, reliable and simple in operation.

A centrifugal blower having at least one radial plane dividing its scroll into sub-sections which may vary as to cut-off points and axial and radial dimensions as well as axial displacement to meet requirements of individual application system flow paths.

The invention discloses a traffic flow database generation method based on time slice division. The method comprises the steps that the historical traffic flow information of a road i is acquried; according to the traffic flow information, the traffic flow curve of each period of every day of the road i is acquired; a first peak point X (im1) and a second peak point X (im2) on the traffic flow curve are used as cut-off points, curves fi (xi) and gi (xi) are fitted; fi (xi) and gi (xi) are respectively divided into N/2 time slices, and a split point is seeked, so that the area enclosed by a step function and the fitted curves are the smallest; the traffic flow of each time slice of the road i is set; steps from 1 to 5 are repeated, and the traffic flow of each time slice of other roads are calculated to form a traffic flow database. According to the method, according to the historical traffic flow information of each period of the whole road network topology, the daily traffic flow curve of each road is divided into a number of time periods according to a peak division method; different traffic flow can be preset in different periods; and the database of the whole road network topology is generated.

The invention discloses a JPEG2000 image coding method. Based on a JPEG2000 standard, Tier1 codes are improved, according to the characteristic that the minimum distortion slope of a first code block serves as an initial value of a threshold and is used for cycle judgment, a coding channel set in a '1' state is coded, and a coding channel set in a '0' state is abandoned. By means of cycle judgment, a large number of Tier1 redundant coding channels can be cut off, and the threshold value of the optimal distortion slope of Tier2 search and the range of optimal cut-off points are reduced, so that JPEG2000 image coding storage capacity and computing time can be remarkably reduced, and coding efficiency is improved. The method includes the steps: 1 original image preprocessing; 2 discrete wavelet transforming; 3 quantitative processing; 4 Tier1 coding; and 5 Tier2 coding.

The invention belongs to the technical field of satellite navigation and discloses a method for optimizing spreading codes of navigation signals. According to the method, under the condition that the code length of a spreading code set to be optimized is unequal to the target code length, cut-off points are determined by calculating the balance of shortened codes and the maximum odd-even self-correlation sidelobe, and according to the maximum odd-even self-correlation sidelobe, interference parameters and the maximum spectrum amplitude, the maximum odd-even self-correlation is further optimized. Compared with the prior art, the method for optimizing the spreading codes of the navigation signals has the advantages that the selection of the code length is free, consideration of odd correlation more accords with the practical application situation, the spreading codes with the better performance can be obtained, and the performance of a satellite navigation system is improved on the conditions of not changing the software and hardware design scheme of the satellite navigation system and not increasing the construction cost of the system.

The invention discloses an encoding method of a remote sensing image. The method comprises the following steps: performing preprocessing on an original remote sensing image, then performing discrete wavelet transformation and quantization processing on the original remote sensing image; dividing a quantized sub-brand coefficient into encoding blocks in smaller sizes, performing plane expansion of significant bit with the same bit depth on each encoding block, and then sequentially ordering each encoding block from small to large; performing embedded bit plane encoding and MQ (multiplier-quotient) arithmetic encoding on each encoding block; calculating rate distortion-slope and accumulation rate of each channel of each bit plane of each ordered encoding block and determining whether to stop accumulating or not; calculating threshold of the rate-distortion slope and screening the rate-distortion slope of remaining channels based on the threshold; and carrying out Tier2 encoding. By adopting the encoding method provided by the invention, coding redundancy of Tier1 can be greatly reduced, and searching range of threshold value of an optimal-rate distortion-slope and optimal cut-off point during the Tier2 encoding is narrowed, so that the encoding efficiency and speed of the remote sensing image are remarkably improved and the complexity is reduced.

A system for diagnosing autism comprises a measuring device, a movie display, a speaker, and a computer connected with the measuring device and the speaker. The computer contains a control program therein, the control program being capable of arranging a sequence of human-voiced syllables in a pseudo-random order and allowing the sequence of the human-voiced syllables to be played from the speaker while a silent subtitled movie being played on the movie display. The measuring device can measure brain response of a patient to obtain an averaged MMN value, which can be compared with a cut-off point by the control program, whereby, if the averaged MMN value is less than the cut-off point, the patient is deemed to have suffered from an autism. The present invention can provide objective data for quantitative analysis for autism, and provide an easy way to diagnose autism.

The invention belongs to the technical field of water environment chemical analysis, and particularly relates to a local coulomb method for measuring biochemically degradable organic matters in a water body. According to the method, uniquely a fastest voltage reduction point is selected as a cut-off point for collecting a voltage; the cut-off point is easy to find, and the measurement time can begreatly shortened, so that the operation efficiency is improved; by means of the local coulomb method of the cut-off point selection method, the linear correlation between the value of oxygen consumption BOMQ1 in a measurement result and the concentration of a GGA standard solution for culture of electricigens is better, the more scientific, reasonable and accurate test method is provided for measuring the biochemically degradable organic matters in the water body by utilizing a microbial fuel cell, and new idea and direction are provided for scientific control of water environment pollution;and the method has great popularization values and wide application prospects.

The invention discloses a micro-catheter virtual intervention path simulation method and device thereof, and the method comprises the steps: n central line points are selected from a central line after the central line of a virtual blood vessel is generated; m points are selected from the edge of a virtual cross section where each center line point is located, h points are randomly generated inside the virtual cross section, and a point set corresponding to the virtual cross section where each center line point is located is obtained; according to the cut-off point of the virtual blood vessel,each point set and a starting point of the virtual blood vessel, a target broken line corresponding to the center line is determined, and the elastic potential energy sum of the target broken lines is smaller than the elastic potential energy sum of any broken line except the target broken line in the broken line set; and smoothing and interpolation operation can be performed on the target brokenline to obtain a continuous curve segment, and the continuous curve segment is determined as a virtual intervention path of the virtual micro-catheter corresponding to the virtual blood vessel. Therefore, the simulation accuracy of the interventional path of the micro-catheter can be improved, and then the plasticity of the micro-catheter and the accuracy of the micro-catheter entering the affected part can be improved.

The invention discloses a distribution method of third-order intermodulation distortion parameters applied inside a receiver radio-frequency system circuit, which belongs to the technical field of electromagnetic compatibility. The distribution method comprises the following steps: firstly processing the overall receiving performance index of a receiver radio-frequency system according to nonparasitic response to obtain a threshold voltage; then computing the total distortion voltage of third-order intermodulation distortion in each level of sub circuit, which is about to enter a received passband according to constraint relation; and finally obtaining the third-order cut-off point of each level of sub circuit according to the relation that the total distortion voltage is smaller than and equal to the threshold voltage. The method of the invention realizes the distribution of the third-order intermodulation distortion parameters of each level of sub circuit under the condition of cascade circuit voltage signal in-phase, thereby the problem of poor communication quality caused by overlarge third-order intermodulation distortion signal interference of the receiver radio-frequency system is solved.

The invention relates to a method for analyzing and testing the charge-discharge performance and charge-discharge mechanism of a lithium battery. The method is technologically characterized by comprising the following steps: S1, making electrode active material particles into lithium battery electrodes, and assembling the lithium battery electrodes into a lithium battery; S2, preprocessing the lithium battery; S3, testing the charge-discharge performance of the lithium battery under different temperatures and currents; S4, setting cut-off points of the lithium battery charge-discharge process; S5, dismantling the lithium battery and stripping the electrodes in an inert gas environment; S6, making a X-ray diffraction analysis of the lithium battery electrodes under different cut-off points, and detecting the change in charge-discharge product of the lithium battery electrodes; and S7, deducing the mechnism of electrode reaction according to reaction mechanism equations of different cut-off points. The change of the active material in the charge-discharge process and the degree the electrochemical reaction reaches can be judged effectively, and the charge-discharge reaction mechanism of the battery can be studied.

The invention discloses a nonlinear gait dynamics discrimination method for Parkinson gait risk assessment. The method proposes a multi-dimensional feature discriminant diagram based on nonlinear dynamic characteristics for gait risk assessment of Parkinson patients, and in combination with a support vector machine, a non-linear dynamics feature and a graphical display method, makes 5-dimensionalnon-linear dynamic features graphically represented in a two-dimensional plane. The method is applicable to gait risk assessment in Parkinson patients. In a normal population, if multiple indicators of the nonlinear gait dynamics discriminant diagram exceed the cut-off point of the discriminant diagram, it indicates that the probability of having the disease or the severity of the disease is greatly increased, and it is necessary to cause individual's own close concern and further examination by doctors.

The invention provides a Macpherson suspension steering trapezium cut-off point position design method and device; the method comprises the following steps: according to the position of an outer spherical hinge point of a track rod lever when the wheels do not swing around the king pin of the Macpherson suspension having the track rod lever, and according to the motion locus of an outer spherical hinge point of a knckle pivot when the wheels do not swing around the king pin of the Macpherson suspension having no track rod lever and the wheels jump up and down, the functions of the space distance (with respect to cut-off point coordinates) between the outer spherical hinge point of the knckle pivot and the outer spherical hinge point of the track rod lever can be obtained; the method also comprises the following steps: setting a cut-off point coordinate value range according to the structure and arrangement conditions of the Macpherson suspension having the track rod lever; determining coordinate values of the outer spherical hinge points of two or more knckle pivots according to the motion locus of the knckle pivot outer spherical hinge point; resolving the cut-off point coordinate values when the space distance is minimum according to the functions of the space distance with respect to the cut-off point coordinates. By using the method, the obtained cut-off point coordinate value is small in errors and high in precision.

According to the working method for replacing a 10kV transformer through the spare power automatic switching technology in an electrified mode, a load wheeling system with two power supply spare power automatic switching control devices is adopted for work. The load wheeling system comprises a first power supply (1), a second power supply, a movable wheeling transformer or low-voltage electric generator set (2), a first power supply spare power automatic switching switch (1DL), a second power supply spare power automatic switching switch (2DL), an external cable (L), a first load switch (K1) and a second load switch (K2), wherein the first power supply spare power automatic switching switch (1DL), the second power supply spare power automatic switching switch (2DL) and the external cable (L) are arranged between the two power supplies. When the 10kV transformer at the front end of a cut-off point (3) of a power supply circuit of a low-voltage user (4) needs to be overhauled, electricity supply is achieved for the low-voltage user through the movable wheeling transformer or low-voltage electric generator set (2) instead; after the transformer (1) is overhauled, electricity supply is achieved for the low-voltage user through the transformer again; according to the principles of the bypass technology and the spare power automatic switching technology, load wheeling is not limited by time or place or power supply any more, power outage prevention is ensured for the user, and power supply reliability of a power distribution network is improved.