150 results about "Distance ratio" patented technology

A purely refractive projection objective suitable for immersion microlithography is designed as a single-waist system with five lens groups, in the case of which a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with negative refractive power, a fourth lens group with positive refractive power and a fifth lens group with positive refractive power are provided. A constriction site of narrowest constriction of the beam bundle lies in the region of the waist. A waist distance AT exists between the object plane and the constriction site X. The condition AT / L≦0.4 holds for a distance ratio AT / L between the waist distance AT and an object-image distance L of the projection objective. Embodiments of inventive projection objectives reach very high numerical apertures NA>1.1 in conjunction with a large image field and are distinguished by a compact overall size and good correction of the lateral chromatic aberration.

Processing chamber shutter blade and robot blade assemblies are constructed to eliminate thermal effects on the placement of elements in processing chambers. Such blade assemblies may contain at least two parts, which may include a positioning member including a low CTE material and a thermal compensating member including a high CTE material. The positioning member includes a coupling point and a reference point on a reference axis separated by a first distance. The thermal compensating member includes a connection point and a controlled point separated by another distance that is less than the first distance. A distance ratio of the first distance to the other distance is substantially equal to a CTE ratio of the high CTE material to the low CTE material, and the positioning member is joined to the thermal compensating member through the coupling point and the connection point.

A method of determining a location of a mobile communication terminal, the method including: receiving base station identification signals from a plurality of base stations; calculating distance ratios between the plurality of base stations and the mobile communication terminal, from the received base station identification signals; generating first variables and second variables from the distance ratios; and determining the location of the mobile communication terminal from the first variables and the second variables is provided.

Systems, methods, and apparatus for geolocating a signal emitting device are disclosed. A monitoring array comprises at least four monitoring units. A distance ratio between the at least four monitoring units relative to a midpoint is determined. The at least four monitoring units are operable to scan independently for a signal of interest. The at least four monitoring units are operable to calculate times of arrival and angles of arrival for the signal of interest. Each of the at least four monitoring units is operable to measure the signal of interest and transmit a formatted message to other monitoring units within the monitoring array. Each of the at least four monitoring units is operable to determine a location of the signal emitting device from which the signal of interest is emitted based on calculations and measurements relating to the signal of interest.

A purely refractive projection objective suitable for immersion microlithography is designed as a single-waist system with five lens groups, in the case of which a first lens group with negative refractive power, a second lens group with positive refractive power, a third lens group with negative refractive power, a fourth lens group with positive refractive power and a fifth lens group with positive refractive power are provided. A constriction site of narrowest constriction of the beam bundle lies in the region of the waist. A waist distance AT exists between the object plane and the constriction site X. The condition AT / L≦0.4 holds for a distance ratio AT / L between the waist distance AT and an object-image distance L of the projection objective. Embodiments of inventive projection objectives reach very high numerical apertures NA>1.1 in conjunction with a large image field and are distinguished by a compact overall size and good correction of the lateral chromatic aberration.

The invention discloses a SURF-based aerial photography image stitching algorithm for a fast unmanned aerial vehicle. According to the algorithm, firstly, an image is pre-processed. Due to the fact that images shot by an unmanned aerial vehicle are too large is size, all images are down-sampled to a certain size. Based on the SURF algorithm, a 64-dimension feature vector is generated. After that, based on the distance ratio of a nearest neighbor distance and a secondary neighbor distance, coarsely matched pairs are obtained. After that, based on RANSAC, mistakenly matched pairs are removed, and a perspective transformation matrix among images is solved out. Along with the changing of the view angle of the unmanned aerial vehicle, the perspective transformation matrix is adjusted and matched images are converted. Finally, based on the multi-band fusion algorithm, the seamless splicing of images is realized. According to the invention, high-precision and high-resolution images, shot by the unmanned aerial vehicle, can be quickly spliced. Meanwhile, spliced edges are smooth in transition and more details are reserved.

The present invention discloses a nasal ala reduction method based on a face network. The method comprises: collecting the face image to be processed; performing face identification of the face image to obtain the feature point of the face area, wherein the feature points of the face area at least includes the feature points of corners of the mouth, a nasal ala area and the outer outline of the cheek; performing interpolation processing according to the distance ratio among the feature points of the nasal ala area, the outer outline of the cheek and the corners of the mouth, and obtaining the supplement feature points of the nasal ala area, wherein the supplement feature points and the original feature points of the nasal ala area commonly form the point sets of the nasal ala area; performing triangulation of the point set of the nasal ala area, and obtaining a plurality of triangular meshes: selecting peaks located at two sides of the bridge of the nose from the peaks of the triangular meshes; and performing location regulation of the selected grid peaks to obtain the converted new triangular meshes. The present invention discloses a nasal ala reduction device based on the face network and the calculation device.

A mobile, hand-held communication device with a display screen and a camera is programmed to perform a postural screening method. An image of a patient is acquired on the display screen having an array of pixels. A pixel to distance ratio of the displayed image is determined. A postural displacement of the patient in the displayed image is calculated using the determined ratio. A gyroscope, accelerometer and / or a level of the device is used to level the camera before capturing the image with the camera. Reference lines are overlaid on the display screen and the image to enable alignment of the image. A reference line on the display screen is used for normalizing a known distance in the aligned image to a reference distance of a known number of pixels on the screen for determining the ratio.

A transmitter includes an encoding module, an adaptive hierarchical signal mapping module and a transceiver module. The encoding module receives an input signal and encodes the input signal. The input signal includes data to be transmitted. The adaptive hierarchical signal mapping module modulates the encoded signal according to one or more hierarchical level distance ratios to obtain modulated symbols. The hierarchical level distance ratio defines distances between the modulated symbols. The transceiver module generates a radio frequency signal according to the modulated symbols and transmits the radio frequency signal to an air interface.

A method for encoding a status PDU including receiving AMD PDUs, determining whether or not there are missing AMD PDUs, calculating an error-checking range and at least one error-occurrence range if it is determined that there are missing PDUs, calculating a distance ratio using the error checking range and error occurrence range, determining whether or not the distance ratio is greater than or equal to a threshold value, selecting a type of super-field for constituting a status PDU based on a determination result, encoding the status PDU with the type of selected super-field, and sending the encoded status PDU to a sending party.

A method of improving pattern recognition accuracy is provided that uses a mechanism for locating a pattern within an input signal, such as provided by a telephone network. This operation is hard because of the variability of the signal that is likely to be received by the pattern recogniser. It will receive a large range of signal amplitudes, possibly embedded in a variety of background noises, and is required to produce its best hypothesis of the patterns in this signal. This invention concerns the identification of the location of the patterns within the input signal, which in some aspects uses feedback from the following pattern matcher, and in other aspects uses a pattern distance to noise distance ratio to determine the pattern identification. Other aspects are also described. It is important to accurately locate the pattern to be recognised as errors in the location of the pattern will result in errors in the recognition of the pattern. The patterns to be recognised are preferably human utterances.

The invention discloses a greenhouse cultivation and management method of high-yield watermelons growing with multiple crops in one year. The method is characterized in that the greenhouse technology is improved; the planting distance ratio is made to be reasonable; the continuous fruit setting technology is adopted, vegetative growth and reproductive growth are adjusted, watermelon fruit setting and watermelon seedling growth are controlled, the fruit setting number and the weight of a single watermelon are increased, and the yield per plant is guaranteed; nutrient and water management is conducted, wherein base fertilizer is applied to the whole layer, organic fertilizer and inorganic fertilizer are combined, nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, calcium fertilizer and magnesium fertilizer are in coordination, topdressing is conducted after watermelons are harvested, the amount of fertilizer is determined according to the yield, drop irrigation is conducted with a small amount of water, and water and fertilizer are combined. Compared with the prior art, the cultivation and management method has the advantages that high yield and high efficiency are achieved, under the condition that watermelons can be produced and supplied all year around, two times to three times of seedling culture, two times to three times of field plantation, seedling management, field operation and other operations can be omitted, and seedling planting cost, labor cost and the like are lowered.

An embodiment of the invention provides a flexible array substrate and a display device, relates to the technical field of display, and can improve the reliability of flexible display devices and increase the yield of the flexible display devices. The flexible array substrate comprises bendable areas, a substrate and N metal patterns arranged on the substrate and located in the bendable areas, wherein N is larger than or equal to 1; the distance ratio corresponding to at least one of the N metal patterns is in a range of 0.9-1.1; the distance ratio corresponding to the at least one of the N metal patterns is the ratio of the distance between the at least one metal pattern and the inner surface of the flexible array substrate to the distance between the at least one metal pattern and the outer surface of the flexible array substrate.

The invention discloses a target tracking method of a passive multi-sensor based on layered particle filtering. A sub-state including an azimuth angle, a change ratio of the azimuth angle, a change ratio of a logarithm radial distance and auxiliary parameters and a sub-state Psi including the logarithm radial distance are constructed to realize a structure of hierarchical filtering through rewriting a system equation of a logarithm polar coordinate and adding the auxiliary parameters indicative of process noise intensity and radial distance ratio, wherein a first layer updates the auxiliary parameters in a second layer by means of sequential importance sampling method according to observation information of various sensors; Psi is iterated and updated; and the auxiliary parameters are combined to obtain estimation of the target state; finally a fusion output result of the target state is obtained according to an optimal information fusion method. Values of the auxiliary parameters can be estimated in real time by using a method of the layered particle filtering, and errors introduced by a maximum value of the noise intensity in the use process of the filtering is avoided, such that the problem of the target tracking can be effectively solved under the conditions of unknown process noise intensity and unmeasured distance.

The invention provides an objective lens of an endoscope, which comprises a front lens system and a back lens system; an aperture diaphragm is arranged between the front lens system and the back lens system; and the ratio of the focal distance of the front lens system to the focal distance of the back lens system is between 0.1 and 2.0. Compared with the prior objective lens of the endoscope, the objective lens of the endoscope effectively controls a distance from an object near plane to the aperture diaphragm and a distance from the aperture diaphragm to an imaging plane through the focal distance ratio of the front and back lens systems; a second lens system in the front lens system can correct most of coma and ratio chromatism generated by a first lens system, and a third lens system in the back lens system can further correct the coma and the ratio chromatism generated by the first lens system; simultaneously, an infrared light filter is arranged between the aperture diaphragm and the third lens system; therefore, the objective lens of the endoscope has the characteristics of short total length, good color restoration, big angle of view, small external diameter and the like to achieve the aim of the invention.

A radio wave transmitted from a mobile station 10 is received in each base station 12, and, based on the received power measured by a received power measuring portion 38 of the base station, a distance ratio calculating portion 54 of a position locating server 14 calculates the difference in the received power between the paired base stations. Based on the difference in the received power, the distance ratio is calculated between the distance from one base station to the mobile station and the distance from the other base station to the mobile station. A locus creating portion 56 of the position locating server 14 creates a locus which is a sequence of points showing positions where the calculated distance ratio is realized. The position calculating portion 58 calculates an intersection of the loci for a plurality of base station pairs, thereby calculating a candidate for the mobile station.

A method for comparing a first image with a second image. The method identifies first keypoints in the first image and second keypoints in the second image and associates each first keypoint with a corresponding second keypoint to form a corresponding keypoint match. For each pair of first keypoints, the method further calculates the distance therebetween for obtaining a corresponding first length. Similarly, for each pair of second keypoints, the method calculates the distance therebetween for obtaining a corresponding second length. The method further calculates a plurality of distance ratios; each distance ratio is based on a length ratio between a selected one between a first length and a second length and a corresponding selected one between a second length and a first length, respectively.

The invention discloses an infrared panorama generation method based on an infrared thermal imaging system. The method comprises the steps that images undergo preprocessing of denoising, coordinate transform and the like; a fast operator combined with a scale space is used to extract feature points; an improved sift feature descriptor is used to generate a feature point descriptor; a distance ratio method is used to roughly match the feature points of two images; and a random sample consensus algorithm (RANSAC) is used to further refine matched points to acquire a transformation matrix betweentwo images; and after an image to be matched is transformed into the coordinate of a reference image, a fade-in and fade-out weighted average method is used to carry out image fusion to stitch two images. The infrared panorama provided by the invention solves the problem of the narrow angle of view of a conventional infrared thermal imager, and has broad prospects and applications in electric power, remote sensing, medicine, agriculture and forestry.

The combined navigation based on star sensor calibration optimizing the inertia, astronomical and satellite for all kinds of high precision fly guide. It modifies the installation error based on the star diagonal distance to get high precision information, calculating the disguise distance and disguise distance ratio relative to the inertia guide position through the astronomical data provided by GPS and the location and speed provided by the inertia guide and comparing with the disguise distance and its ratio measured by the GPS as the measuring value, through combined Kalman filter model to estimate the inertia guide system and GPS error and ratifying accordingly to these two systems based on feedbacks. It can improve combined guide navigation precision and reach a high quality combination, whose precision is better than any single guide navigation precision.

The disclosed enterprise warning system can compare, analyze, and evaluate management and operation information to decide whether the enterprise into crisis state and provide reference opinion for the operator. Wherein, the system comprises six modules referred to the bi-base-point distance ratio method, a prediction-probability recognition method, the fuzzy recognition cluster method, the parameter modification, system maintenance, and help; every of three method modules also includes data processing module and result or opinion module. This invention can enhance enterprise anti-crisis ability efficiently.

An image display processing apparatus includes an input-shape detector detecting a shape of a trajectory of a line drawn in the monitor screen; a center-point determiner determining, in a case where the shape of the trajectory of the line is formed of a circular line and an offshoot line extending from the circular line, a center point of a graphic object formed of the circular line; a ratio calculator calculating a distance ratio between a distance from the center point of the graphic object to the circular line and a distance from the center point of the graphic object to an end point of the offshoot line; and an enlargement-ratio changer changing the enlargement ratio of the image on the basis of the distance ratio.

The invention discloses an improved scale invariant feature transformation (SIFT) operator based low altitude multi-view remote-sensing image matching method. Firstly, an optimized DoG operator is used for performing feature point detection on a first image and a second image, then, a local area sampling simulation based SIFT descriptor is used for describing a feature point so as to form a feature vector, and finally, an initial matching feature point is formed by use of a nearest neighbor distance ratio (NNDR) policy, and matching points are purified by use of an epipolar geometric constraint based random sample consensus (RANSAC) algorithm. Through adoption of the method, problems of multi-view and weak texture in low altitude remote-sensing image matching can be solved effectively.

The invention relates to a high-performance, high-zoom-ratio zoom lens that can be much more reduced in terms of thickness upon received at a collapsible lens mount, and an imaging system incorporating the same. The zoom lens comprises a positive first lens group G1, a negative second lens group G2, a positive third lens group G3 and a positive fourth lens group G4. Upon zooming from the wide-angle end to the telephoto end, the first G1, the second G2, the third G3 and the fourth lens group G4 each move such that the air spacing between the first G1 and the second lens group G2 grows wide, the air spacing between the second G2 and the third lens group G3 becomes narrow, and the air spacing between the third G3 and the fourth lens group G4 grows wide. The zoom lens satisfies condition (1) with respect to the transverse magnification of the second lens group G2 at the wide-angle end, and condition (2) with respect to the focal distance ratio of the zoom lens system between the wide-angle end and the telephoto end.

A method comparing first and second images, including: identifying and matching first and second keypoints in the first and second images; arranging a distribution of values of a calculated plurality of first distance ratios in a histogram; determining a number of correct keypoint matches, including: determining a matrix, each matrix element corresponding to a respective pair of keypoint matches with a value corresponding to a difference between a value of the histogram including a distance ratio of the respective pair of keypoint matches and an outlier probability density value weighted by a parameter; determining the parameter value such that the matrix dominant eigenvector is equal to a vector with a first value if the pair of keypoint match is correct and a second value if the pair of keypoint match is incorrect; determining the number of correct keypoint matches based on the dominant eigenvalue associated to the dominant eigenvector.

The invention relates to the technical field of infrared thermometer detection, in particular to complete equipment for infrared thermometer detection, which is equipment used for detecting various performance indexes of an infrared thermometer. The complete equipment comprises the following parts of a three-dimensional movement system, a three-dimensional movement control and recording device, a heat source loading platform and a target surface. The complete equipment provided by the invention has the characteristics of high automation degree, strong practicability, novel design, simple operation and the like, and can detect various performance indexes of infrared thermometers with various models and specifications and different shapes. By adopting the complete equipment, the problems of distance ratio of the infrared thermometers and detection of sighting device precision can be solved, the measurement values of the infrared thermometers can be traced, the infrared thermometers used in the production field can be effectively monitored, thus, the correctness and reliability for electric equipment to use monitoring equipment to detect data can be ensured.

Disclosed is a method and a system for providing a location-based alert service in a wireless communication environment, wherein, in a case where a specific user is located in a certain zone using a mobile communication terminal and a mobile communication network, the number of location inquiries is minimized using a moving distance ratio, a moving direction and a Minimum Bounding Rectangle (MBR) in providing the a location-based alert service for informing that the specific user is located in a certain zone.

The invention provides a high-precision wireless sensor network positioning algorithm based on nonlinearity optimization. The method comprises the following steps of: (1) enabling unknown nodes to obtain minimum hops of anchor nodes by a flooding way; (2) approximating a distance ratio of the unknown nodes to different anchor nodes by using the minimum hops ratio, and abstracting three cases in which no intersection point exists, only one intersection point exists and more than one intersection point exists when equations are established as uniform nonlinearity optimization positioning molds; and (3) solving nonlinearity optimization problems, determining positions of the unknown nodes and processing different cases according to the solutions of the nonlinearity optimization molds in the step (2): a) using a unique solution as a coordinate of the unknown nodes when the unique solution exists; and b) using centroids of a plurality of solutions as the coordinates of the unknown nodes when the plurality of solutions exist. Based on the nonlinearity optimization, the wireless sensor network positioning algorithm has higher positioning precision; and the positioning precision is further improved by reasonably deploying the anchor nodes.

The invention discloses a distance ratio based D2D (dimension to dimension) link spectrum allocation method, belonging to the technical field of wireless communication. The method disclosed by the invention is implemented through selecting a D2D link which carries out communication by using a cell uplink in a cell, firstly selecting a base station user according with distance-ratio conditions in the cell, and sharing the spectrum resources of the base station user with the D2D link; and if the spectrum can not be shared, separately allocating a spectrum to the D2D link. Through the method, the interference problem in a D2D system is solved, thereby obtaining the capacity enhancement and ensuring the reliable D2D communication; and meanwhile, the spectrum selection criteria of D2D links is greatly simplified, thereby helping a base station to rapidly complete the spectrum allocation of D2D links.

The invention provides an indoor positioning method and an indoor positioning system. The indoor positioning method comprises the steps of acquiring a signal strength value of a signal which is received by each signal receiving end and transmitted from a target signal transmitting end; calculating a distance ratio between two signal receiving ends and the target transmitting end according to the signal strength values which are received by every two signal receiving ends, and performing traversal of all signal receiving ends for obtaining a plurality of sets of distance ratios; drawing the track of the target signal transmitting end according to position coordinates of every two signal receiving ends and the corresponding distance ratio; and solving according to a fuzzy map strategy according to a plurality of tracks of the target signal transmitting end, thereby obtaining the position coordinate of the target signal transmitting end. The indoor positioning method and the indoor positioning system is based on a differential positioning theory. By means of a principle that wireless signal microscale multipath effect attenuation in the same environment is approximately same, according to a plane geometry principle and a fuzzy map method, interference factors such as multipath effect in a wireless signal indoor transmission process are eliminated, thereby realizing indoor target positioning and improving indoor positioning precision.