876results about How to "Improve coherence" patented technology

An optical sensing probe includes a tube having a tip portion configured for placement in an environment in which conditions are to be sensed and an etalon having a known characteristic disposed proximate the tip portion. The tube also includes a head portion remote from the tip portion containing a light directing element for directing light beams at the etalon and receiving reflected light beams from the etalon wherein the received reflected light beams are used for determining an environmental condition proximate the tip portion. A method for measuring a thickness of the etalon may include directing a light beams at different frequencies at the etalon and receiving the light beams from the etalon. The method may also include identifying conditions of the respective light beams condition received from the etalon and then calculating a first thickness of the etalon responsive to the respective conditions and the known characteristic.

The invention discloses a landslide early recognition method based on a small baseline set time sequence InSAR, and the method comprises the following steps: S1, selecting N+1 SAR images at a band L; S2, carrying out the focused imaging of the SAR images; S3, selecting a common image; S4, carrying out the registering and resampling of the time sequence SAR images; S5, generating a difference interferogram according to a small baseline rule; S6, extracting a point target and forming a network; S7, untwisting of a sparse network; S8, removing an atmosphere phase; S9, calculating the sedimentation rate through an SVD method. Aiming at a typical landslide-prone region, the method achieves the landslide deformation monitoring based on the time sequence InSAR technology through the stored SAR satellite data, achieves the high-precision discovery and mastering of the landslide deformation law, and provides an economical, effective and reliable microwave remote sensing technological guarantee for the prevention of landslide geological hazards.

In one embodiment, the invention relates to systems, methods and devices for improving the operation of an electromagnetic radiation source or component thereof. In one embodiment, the source is a laser source. A Fourier domain mode locked laser can be used in various embodiments. The sources described herein can be used in an optical coherence tomography (OCT) system such as a frequency domain OCT system. In one embodiment, laser coherence length is increased by compensating for dispersion. A frequency shifter can also be used in one embodiment to compensate for a tunable filter induced Doppler shift.

The invention discloses a multi-angle face recognition model training and testing system which comprises a face sample library angle division module, a multi-angle sample combination training module, a face angle loss function calculation module and a multi-angle face recognition model testing module. According to the invention, the system is applicable to multi-angle face recognition; the problem of poor non-positive-face recognition effect in a face recognition process can be overcome; and the accuracy of non-positive-face recognition in the face recognition process is improved.

The invention discloses a cold atom beam interference gyro device, which comprises a cold atom beam system, a coherent atom beam operating system, and a gyro rotating signal extracting system. The cold atom beam system continuously emits | 1 > state cold atom beams as a matter wave source; the coherent atom beam operating system is composed of three gratings placed on the emitting path of | 1 > state cold atom beams in turn, and three phase modulators for modulating the phases of three gratings, respectively; | 1 > state cold atom beams orderly enter the three grating for splitting, reflecting and splitting again so as to obtain | 2 > energy state atom beam and | 1 > state cold atom beam interference signals; the | 2 > energy state atom beam interference signals are induced to produce fluorescent signals by the probing laser of the gyro rotating signal extracting system, a photoelectric detecting device detects the fluorescent signals and transmits the signals to a computer for processing to obtain gyro rotating angular-speed signals. With this device disclosed by the invention, high-precision gyro absolute rotating signals relative to inertial space and with high requirement on environment can be obtained.

A source grating for X-rays and the like which can enhance spatial coherence and is used for X-ray phase contrast imaging is provided. The source grating for X-rays is disposed between an X-ray source and a test object and is used for X-ray phase contrast imaging. The source grating for X-rays includes a plurality of sub-gratings formed by periodically arranging projection parts each having a thickness shielding an X-ray at constant intervals. The plurality of sub-gratings are stacked in layers by being shifted.

The invention provides a tool used for testing the function and performance of touch control equipment. The tool has the characteristic that multiple fingers simulate a human hand and move in a combined mode. The tool structurally comprises a plurality of finger modules, movement relations are transmitted through a connection rod telescopic mechanism among the finger modules, the aim of dynamically controlling the distances between the fingers during a touch test can be achieved, and the test function of a traditional touch screen test instrument is perfected. Moreover, on the basis that the tool has the characteristic that the multiple fingers can flexibly move, the tool is installed on a movement platform to carry out test movements, test difficulties of multi-shape touch screen devices are eliminated, various single-item touch screen tests can be completed in an integrated mode so that test efficiency can be improved, meanwhile, real touch operations, such as touch force changes and finger moving track deviation, of the hand of a person can be simulated by means of the device, user experience of the touch control equipment can be accessed when touch operations are carried out by the hand of the person, and accordingly product design can be improved, and the tool can assist in development of multi-finger application programs.

The present invention relates to a laser sensor for self-mixing interferometry. The laser sensor comprises at least one semiconductor laser light source emitting laser radiation and at least one photodetector (6) monitoring the laser radiation of the laser light source. The laser light source is a VECSEL having a gain medium (3) arranged in a layer structure (15) on a front side of a first end mirror (4), said first end mirror (4) forming an external cavity with an external second end mirror (5). The proposed laser sensor provides an increased detection range and can be manufactured in a low-cost production process.

A method for measuring bi-directional similarity between a first signal of a first size and a second signal of a second size includes matching at least some patches of the first signal with patches of the second signal for data completeness, matching at least some patches of the second signal with patches of the first signal for data coherence, calculating the bi-directional similarity measure as a function of the matched patches for coherence and the matched patches for completeness and indicating the similarity between the first signal and the second signal. Another method generates a second signal from a first signal where the second signal is different than the first signal by at least one parameter. The method includes attempting to maximize a bi-directional similarity measure between the second signal and the first signal.

A source grating for X-rays and the like which can enhance spatial coherence and is used for X-ray phase contrast imaging is provided. The source grating for X-rays is disposed between an X-ray source and a test object and is used for X-ray phase contrast imaging. The source grating for X-rays includes a plurality of sub-gratings formed by periodically arranging projection parts each having a thickness shielding an X-ray at constant intervals. The plurality of sub-gratings are stacked in layers by being shifted.

Methods and apparatus for temporal matte filtering. Temporal matte filtering methods are described that improve the temporal coherence of alpha mattes for a video sequence while maintaining the matte structures on individual frames. The temporal matte filter may implement a level-set-based matte averaging method. In the level-set-based matte averaging method, two or more input alpha mattes are obtained. Level set curves are generated for the two or more alpha mattes. An averaged level set is computed from the two or more level sets according to a distance-transform-based technique. A temporally smoothed alpha matte may then be reconstructed by interpolating pixel alpha values between the inner and outer level set curves of the averaged level set. The alpha mattes can be optionally warped towards a center frame according to an optical flow technique before the averaging operation performed by the temporal matte filter.

The present disclosure provides a page display method and apparatus, and belongs to the technical field of terminals. The method comprises: when a page loading request for sending a specified page is detected, obtaining first page data from a specified memory space, wherein the first page data refers to page data obtained in history loading processes on the specified page; based on the first page data, displaying the specified page; receiving second page data, wherein the second page data is page data obtained based on the page loading request; determining difference data between the first page data and the second page data; and according to the difference data, rendering a corresponding part to the difference data on the specified page to obtain updated specified page. The method and apparatus provided by the present disclosure can avoid splash screen and white screen phenomena in the page loading process, and then can improve page display coherence.

The invention relates to a method and a system for making a traffic sign marking. The traffic sign marking comprises a traffic sign and a traffic marking, and also traffic facilities; a laser generator is used for generating laser to form three-dimensional or two-dimensional traffic sign marking, and the laser beam generated by the laser generator can be adjusted to change the traffic sign marking. By adopting the method and the system, the vacant lane in the opposite direction can be utilized to relieve the pressure of traffic jam sections and solve the problem that traffic jam appears in the downtown direction and less cars go in the uptown direction when people go to work, and the traffic jam appears in the uptown direction and less cars go in the downtown direction when people get off work.

The invention provides an ancient poetry generation method based on image content. The method comprises the steps that 1, target detection is conducted on image content objects based on a single-time multiple-frame target detection frame, and the names of the objects are obtained; 2, word separation is conducted on a set number of Tang poetries by using the Chinese lexical analysis tool, and a glossary is obtained, feature learning is conducted on each word in the glossary by using the word2vec tool, and each word is mapped to a vector space; 3, the obtained object names are inputted into the word2vec tool, a mapped vector of the object names is obtained, and the cosine similarity between the mapped vector and an ancient poetry vector is calculated, after a threshold is set, part of the object names selected are used as the corresponding subject term of the objects; 4, the subject term is utilized to expand the keywords, after the keywords are inputted and the Tang poetries are learned, a RNN model is obtained, and the ancient poetries are generated. According to the ancient poetry generation method, the method of target detection and the method of cyclic neural network algorithm are combined to generate ancient poetries, and the correlation between ancient poetries and image content is strong, and better coherence is achieved.

The invention discloses a weighting-based two-dimensional compressive sensing SAR (Synthetic Aperture Radar) imaging and moving target detection method. The implementation process of the method comprises the following steps: acquiring echo data through a dual-channel SAR model; constructing reconfiguration matrixes of the channel 1 and the channel 2; constructing a weighting-based restoration reconfiguration method; down-sampling the echo data and the reconfiguration matrixes according to the dual channels; obtaining scattering coefficients of the two channels by using the weighted restoration reconfiguration method and compensating fixed phase difference caused by channel space for the scattering coefficient of the channel 2; performing cluster suppression on the compensated scattering coefficient by using a DPCA (Data Processing Control Area) method to obtain the detected moving target SAR image. The method mainly solves the problems of large reconfiguration error and reduced moving target detection performance under the condition of non-sparse scene and lower signal-to-noise ratio, the reconfiguration accuracy of the SAR image can be improved under the conditions of non-sparse scene and lower signal-to-noise ratio, and the clutter suppression and the moving target detection performance are improved. The method is used for moving target detection of airborne multi-channel radar.

The invention provides a method, device, equipment and readable medium for generating comment based on artificial intelligence, wherein the method comprises: candidate participles, aligning with target participles and belonging critical statements which is matched with the topic, are excavated from a predetermined text corpus of participles, then the alignment feature, language feature and contextual feature of the candidate participles are attained respectively; according to the alignment feature, language feature, contextual feature and a pre-training feasibility scoring model, the feasibility score of the target participles replaced by the candidate participles in the critical statements is predicted, if the feasibility store is greater than or equal to the predetermined threshold value of the feasibility score, then the target participles in the critical statements are replaced by the candidate participles, and critical statements aligning with the topic are generated. The technical scheme can generate critical statements automatically, thereby the manpower cost can be decreased and the efficiency of generating comment is improved.

Disclosed are a method and a system for advertising in a self-adapting mode in video content. The method comprises steps of reading a video frame in which an advertising content is inserted, recognizing object sets of the video frame and video frames of the preset number before the video frame, calculating and determining the similarity of all advertising content of an advertizing content bank and the object sets; and inserting the advertizing content of the most similarity in the video frame. According to the technical scheme, the content of the playing video frame and the advertising content have good continuity, and the continuity of the video content and the advertising content is improved.

The invention discloses a device for hand rehabilitation training with the function of wrist rehabilitation training, which effectively solves the problems in the prior art that the training device is bulky and not easy to carry, and has the advantages of simple structure, easy operation and high functionality. As follows: the device includes at least one two-joint finger training mechanism and a wrist training mechanism; wherein, each two-joint finger training mechanism includes a power drive source fixed by the joint bracket of the finger near the end of the finger, and the push rod of the power drive source is connected to the finger near the end of the finger. The joint driving part is connected to control the rear joint of the human finger; the finger proximal end joint support, the finger proximal finger end joint driving part is fixed by the finger proximal finger end joint support and the finger proximal finger end joint support defines the position of the finger proximal finger end joint driving part The moving path is the far fingertip joint support of the finger, and the multi-link mechanism is connected with the finger far fingertip joint support.

The invention relates to an anti-losing device based on a virtual fence, and a positioning method and a purpose thereof. The anti-losing device is characterized in that a server is used for sending IDs (identity) of all base stations forming the virtual fence to a monitoring terminal at fixed time, and the monitoring terminal is used for receiving and storing the IDs, obtaining the ID of the currently connected base station through network communication at fixed time, and comparing with the IDs of the base stations stored in the monitoring terminal, so the monitoring terminal does not need to maintain long-time communication with the server, a GPS (global positioning system) module does not need to maintain the long-time opening state, and only when the IDs of the base stations stored in the monitoring terminal do not contain the ID of the currently connected base station, namely the mobile terminal just enters or leaves the range of the virtual fence, the monitoring terminal starts the GPS function module to position the current position of the monitoring terminal, and sends the current position to the server through a GSM (global system for mobile communication) or a GPRS (general packet radio service) or a 3G (third-generation) network, the alarming is sent to the server, and then the server sends alarming to a monitoring platform. The anti-losing device has the advantages that the consumption of electric energy of the monitoring terminal is greatly reduced, and the working time is prolonged.

The invention relates to a composite frame system with beam column flanges being made of steel pipe concrete and a construction method. The composite frame system with the beam column flanges being made of the steel pipe concrete is formed by connecting composite columns with composite beams through joints. The composite beams are horizontally arranged among the composite columns. The joints are steel pipe concrete integral type joints. The composite columns are cross-shaped or I-shaped composite columns with the flanges being made of the circular steel pipe concrete. The composite beams are I-shaped honeycombed beams with the flanges being made of the steel pipe concrete. The joints and the composite columns are fixedly connected at respective connecting plates through high-strength bolts. The joints and the composite beams are connected through buffer sections which are I-shaped honeycombed beams with the flanges being made of the steel pipe concrete. The cross sections of the buffer sections are variable cross sections gradually diminished from the two ends to the centers, and the cross sections of the buffer sections are smallest at the midpoints. The problems that according to an existing steel-concrete composite structure, construction is complex, connection and stability between the composite structure are poor, and the joints are liable to damage under the earthquake effect are solved.

The invention discloses a method for hybrid programming of an on-line chart log and a short message record of a user. The method comprises the following steps of: firstly extracting all of chart logs of instant messaging software based on an address list, and storing all of the chart logs in a memory; extracting the short message record from a mobile phone to be saved with the chart logs; secondly classifying the chart logs and the short message record according to contacts, and sequencing the chart logs and the short message record according to a transmission time sequence of the chart logs and the short message record; and finally displaying the chart logs and short message record with the same contact through a uniform view interface in a time sequence. Through the method disclosed by the invention, the on-line chart logs and short message record with the same contact can be displayed in the same view. When the short message record with the same contact does not need to be looked up, an operation of jumping from IM (Information Management) software view to a mobile phone short message interface view is repeated, thus the coherence of browsing the message record with the same contact by the user is effectively improved, and the user experience degree is increased.

The invention discloses an optical micro-cavity light-frequency comb generating system based on comb tooth feedback control and regulation, and belongs to the optical field. The system comprises a pumping laser, an optical micro-cavity, a feedback regulation and control loop and the like. After parts of comb teeth in light-frequency comb signals generated in the optical micro-cavity are filtered, amplified or regenerated by the feedback regulation and control loop, the feedback regulation and control loop and the pumping laser stimulate the optical micro-cavity together, and the high performance of an optical micro-cavity light-frequency comb is realized by the formed feedback regulation and control loop. Compared with the existing system for generating a light-frequency comb by using a single pumping layer, the optical micro-cavity light-frequency comb generating system has the advantages that the threshold value generated by the light-frequency comb can be reduced, the coherence is increased, controlled comb tooth gaps are formed, and tolerance on pumping conditions is improved. Moreover, the optical micro-cavity light-frequency comb generating system is simple in structure and high in repeatability; and the performance improvement effect of the system is remarkable.

A nano-electromechanical system comprises piezoelectric vertically aligned BaTiO3 nanowire arrays for energy-harvesting applications, sensors, and other applications. The aligned piezoelectric nanowire arrays provide highly accurate nano-electromechanical system-based dynamic sensor with a wide operating bandwidth and unity coherence and energy harvesters at low frequencies. The growth of vertically aligned (B45-mm long) barium titanate nanowire arrays is realized through a hydrothermal synthesis.

The present invention provides nano particle size measuring method and device with scattered dynamic low-strength laser. The method includes: radiating liquid sample with monochromic laser beam of proper length to produce scattered light signal; collecting and transmitting to light signal with single-modular fiber with gradient refractive index; recording with single-photon counter module the scattered photons and converting into output electric pulse signal; and processing the signal in an autocorrelator. The device includes: light source, polarizer, focusing lens, two-layered refractive index sample matching pool, fiber, single-photon counter module, autocorrelator and computer. The present invention can measure nano particle size fast and accurately.

The invention relates to a coaxial Fizeau synchronous phase shifting interferometer capable of adjusting extended light illumination and belongs to the field of an optical interference measuring device. The coaxial Fizeau synchronous phase shifting interferometer comprises an extended light source assembly, a fronting Michelson type interferometer assembly and a Fizeau main interferometer. In the invention, the fronting interferometer assembly is adopted to generate two illumination light waves of orthogonal polarization state; polarization phase shifting interferometry between a measured surface and a reference surface is realized through match of spatial coherence of the fronting interferometer and the main interferometer; and an additional fringe is removed by using the characteristic of a short coherent optical length of an extended light source space. The coaxial Fizeau synchronous phase shifting interferometer has the characteristics of long measuring distance, continuous and adjustable contrast ratio, continuous and adjustable coherent optical length, easy operation, lower error requirement on a high frequency surface shape of the reference surface and the like; and the coaxial Fizeau synchronous phase shifting interferometer can be used in the fields of high precision detection of an optical element, optical element on-line detection and super-smooth surface detection and the like.

The invention relates to an artificial feeding method of tested insect, especially relates to an artificial feeding method of tested chive maggot, wherein the Chinese chive feedstuff is replaced by the artificial synthetic feedstuff, thus the survival rate, pupation rate, emergence rate, single-female fecundity are greatly increased compared with the prior tested chive maggot breeding method, therefore the good condition is provided for regular supply of tested chive maggot.

The invention relates to a synthetic aperture radar interferometric ionized layer phase estimation and compensation method, which is characterized by comprising the specific steps of: step 1, carryingout precision registration of primary and subsidiary images and resampling of the subsidiary image; step 2, optimizing a lookup table and resampling the subsidiary image again; step 3, carrying out bandpass filtering on the primary and subsidiary images, and generating full bandwidth and subband differential interferograms; step 4, performing ionized layer phase estimation; step 5, and conductingsurface deformation phase solution. The synthetic aperture radar interferometric ionized layer phase estimation and compensation method can obtain a more precise registration offset amount, significantly improves the coherence of the images, and is more continuous in interferograms. The synthetic aperture radar interferometric ionized layer phase estimation and compensation method constructs SLCimages of front and rear sub-bands, can identify the influence of ionized layer path delay on radar images by utilizing the multi-aperture radar interferometry, constructs two upper and lower sub-bandsignals with different center frequencies, estimates and eliminates phase errors caused by electron density change of the ionized layer through optimizing the ionized layer estimation processing step, and improves the interferometric precision.

The invention discloses a method and device for laser-welding foil and a lug. The method comprises the following steps of taking at least one layer of the foil as a laser absorbing surface to put in front of the lug; adsorbing or pressing the foil and the lug together; arranging a laser focus on the lug; and welding the foil and the lug. The method adopts non-contact type laser welding to replaceconventional ultrasonic contact type welding, so that the foil and the lug are not affected by external force, and processing is stable. Laser processing efficiency is high, and multi-pulse light spots of laser can be adopted for process.