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1253 results about "Extinction" patented technology
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In biology, extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence.
Method for determining at least one hemoglobin related parameter of a whole blood sample
Owner:ABBOTT POINT CARE
Electronic lighting unit and photographic equipment with the electronic lighting unit
InactiveUS20050168965A1Efficient productionEnsure normal power onTelevision system detailsBuilding locksSelective excitationExtinction
A lighting unit for producing flash light toward subjects in a photographic scene comprises an matrix array of light emitting elements arranged so as to have individual lighting fields different from one another, a selective excitation circuit for exciting selectively the light emitting elements so as to produce flash light, different in intensity as appropriate, in predetermined lighting patterns and an excitation / extinction circuit 250 for exciting or extinguishing the light emitting elements. A photographic equipment equipped with the lighting unit has directive switches or buttons for directing the lighting unit to select lighting pattern according to focal lengths, zoom rations, operation modes including a communication mode, and / or demands of pre-lighting,
Owner:FUJI PHOTO OPTICAL CO LTD
Method for mensurating parameter of weather and atmospheric environment
InactiveCN101004453AImplement detectionIndication of weather conditions using multiple variablesElectromagnetic wave reradiationAerosol extinction coefficientExtinction
A method for determining parameter of atmospheric environment includes using laser radar determining system to receive backward scattering light of atmosphere, splitting received light to be various lights required by laser radar, carrying out analysis and treatment of data as per set program after photoelectric detection for realizing measurement on atmospheric environmental parameters such as temperature, steam density, airosol extinction coefficient, scattering coefficient, airosol optical thickness, visibility and depolarization ratio of non-spherical particle backward scattering light.
Owner:XIAN UNIV OF TECH
Compensation of human variability in pulse oximetry
InactiveUS20050250998A1Improve accuracyDiagnostic recording/measuringSensorsExtinctionPulse oximetry
Owner:GENERAL ELECTRIC CO
Fabrication of microstructured optical fibre
InactiveUS20060104582A1Smooth materialImprove optical qualityLaser using scattering effectsCladded optical fibreAudio power amplifierExtinction
Microstructured optical fibre is fabricated using extrusion. The main design of optical fibre has a core suspended in an outer wall by a plurality of struts. A specially designed extruder die is used which comprises a central feed channel, flow diversion channels arranged to divert material radially outwards into a welding chamber formed within the die, a core forming conduit arranged to receive material by direct onward passage from the central feed channel, and a nozzle having an outer part in flow communication with the welding chamber and an inner part in flow communication with the core forming conduit, to respectively define an outer wall and core of the preform. With this design a relatively thick outer wall can be combined with thin struts (to ensure extinction of the optical mode field) and a core of any desired diameter or other thickness dimension in the case of non-circular cores. As well as glass, the extrusion process is suitable for use with polymers. The microstructured optical fibre is considered to have many potential device applications, in particular for non-linear devices, lasers and amplifiers.
Owner:UNIV OF SOUTHAMPTON
Microarray synthesis instrument and method
InactiveUS7083975B2Minimizes reflected lightUndesired reactionMaterial nanotechnologyBioreactor/fermenter combinationsDNA microarrayFlow cell
During the light illumination period of a monomer addition cycle in synthesizing an DNA microarray, undesirable reflections of illumination light from various interfaces that the illumination light passes through near the synthesis surface of the substrate may reduce the light-dark contrast, and negatively affect the precision and resolution of the microarray synthesis. The present invention provides an flow cell that reduces the undesired reflections by constructing certain flow cell structures with materials that have similar refractive indexes as that of the solution that is in the oligomer synthesis chamber during the illumination period and / or constructing certain flow cell structures or covering the structures with a layer of a material that has a high extinction coefficient.
Owner:ROCHE NIMBLEGEN
Instrument and method for optical particle sensing
ActiveUS20140234865A1Narrow size distributionConsistent amountCompound screeningApoptosis detectionFlow cellFluorescence
Devices for detecting particle sizes and distributions using focused light scattering techniques, by passing a sample through a focused beam of light, are disclosed. In one embodiment, the devices include one or more lasers, whose light is focused into a narrow beam and into a flow cell, and dispersions are passed through the flow cell using hydrodynamic sample injection. In another embodiment, a plurality of lasers is used, optionally with hydrodynamic sample injection. Particles pass through and scatter the light. The scattered light is then detected using scatter and extinction detectors, and, optionally, fluorescence detectors, and the number and size of the particles is determined. Particles in the size range of 0.1 to 10 μm can be measured. Using the device, significantly smaller particles can be detected than if techniques such as EQELS, flow cytometry, and other conventional devices for measuring biological particles.
Owner:INVITROX
Topic detection and tracking method based on microblog data
ActiveCN103390051ASolve the sparse problemAccurate descriptionSpecial data processing applicationsMicrobloggingExtinction
The invention discloses a topic detection and tracking method based on microblog data. In the method, potential hidden subjects in large-scale social network information are mined. The method comprises the following steps: firstly, partitioning microblog data increasing massively according to time sequence properties, and filtering redundant information; secondly, analyzing and classifying text contents in time windows, returning key subject descriptions with independent semantics after extraction, and extracting topics in different time windows; and lastly, analyzing the inheritance and the identity of topics among the time windows to conclude the variation tendency of microblog topics. According to the method, the dynamic developing process of topic contents, namely, the generation, development, climax and extinction of topics can be shown, and topics are described more accurately and fully.
Owner:NANJING UNIV OF POSTS & TELECOMM
Image-brightness-characteristic-based pan/tilt/zoom (PTZ) video visibility detection method
InactiveCN102175613AReduce monitoring costsImprove stabilityImage enhancementImage analysisExtinctionRoad surface
The invention discloses an image-brightness-characteristic-based pan / tilt / zoom (PTZ) video visibility detection method, which comprises the following steps of: acquiring a road condition video image by using a PTZ video camera, extracting a region of interest (ROI) of the road surface, and acquiring high consistency of the selected pixels; obtaining an accurate road surface region by utilizing a Nagao-filtering-based regional growth algorithm, and ensuring consistent illumination of the selected pixels in a world coordinate; in the road surface region, extracting a contrast curve reflecting the road surface brightness change, searching brightness curve characteristic points, and calculating the farthest pixel which can be identified by human eyes in the image through an extinction coefficient; and combining the camera to calibrate and convert the maximum visual range, and determining a visibility value. In the method, artificial markers are not needed to be set, the existing PTZ camera is fully utilized to shoot road condition and acquire images, can monitor the road condition in real time, and is low in monitoring cost; moreover, the requirement on large-area road condition monitoring is met, the monitoring is stable and is not interfered by external environment, and the visibility monitoring method is easy to implement, high in accuracy and good in effect.
Owner:南京汇川图像视觉技术有限公司
Configurations and methods for acid gas and contaminant removal with near zero emission
InactiveUS20060150812A1Reduce temperature riseEnhance selective absorptionProductsLiquid degasificationWaste streamHydrocotyle bowlesioides
A gas (1) comprising hydrogen sulfide, carbon dioxide, and hydrocarbon contaminants is treated in a plant (FIG. 2) in a configuration in which waste streams are recycled to extinction. In especially preferred aspects of contemplated methods and configurations, hydrogen sulfide and other sulfurous components are converted to a sulfur product (37), carbon dioxide (44A) is separated at a purity sufficient for enhanced oil recovery or sale, and hydrocarbon contaminants are purified to a marketable hydrocarbon product (49).
Owner:FLUOR TECH CORP
Overhead rail type firefighting inspection robot system
ActiveCN106540390AGood detectionGood detection positionFire rescueManipulatorRobotic systemsLocation detection
The invention discloses an overhead rail type firefighting inspection robot system. The overhead rail type firefighting inspection robot system comprises an overhead rail part, overhead rail type firefighting inspection robots, fire extinction equipment, a position identification block, a charging position, a remote control center and wireless signal transmission equipment. Each overhead rail type firefighting inspection robot comprises a traveling part, a lifting vision device, a position detection device, a detector, a fire extinction control device and a control and communication device. The robots move on a rail of the overhead rail part. The position detection devices conduct positioning by identifying the position identification block. The robots can be charged at the charging position. The fire extinction control devices operate the fire extinction equipment. The control and communication devices achieve communication of the robots and the remote control center through the wireless signal transmission equipment. The robots of the overhead rail type firefighting inspection robot system can conduct inspection detection along the rail, find out equipment failures and potential safety hazards and can conduct fire extinction operation in time.
Owner:CHINA UNIV OF MINING & TECH
Dynamic Terahertz Switch Using Periodic Corrugated Structures
InactiveUS20120019901A1Ease of lightOptical light guidesNon-linear opticsManufacturing technologyElectrical conductor
A subwavelength terahertz (THz) switch using an artificially designed conductor metamaterial is discussed in this invention. Theoretically, slow-light EM wave propagating at THz speed imitates the strongly localized surface plasmon modes and henceforth is called Spoof Surface Plasmon Polariton (SSPP) mode in this invention. The SSPP mode of slow-light EM propagation can be easily tailored by changing the refractive index of the dielectric materials inside the metallic gap structure engineered as a periodic array of grooves. Thus, the incorporation of electro-optical material which has birefringence such as a nematic liquid crystal (N-LC) or multiple-refractive indices into the metallic gap leads to a highly compact and efficient terahertz switch being controlled by a low-voltage signal. The optimal design of the SSPP switch enabled by this novel method shows many interesting properties including 1) strong subwavelength localization; 2) relatively high extinction (On / Off switching) ratio; and 3) small damping attenuation. The THz dynamic switches can be used to construct linear switches, Y junction switches and Mach-Zehnder interferometers by using micromachining and other fabrication techniques.
Owner:MAZUMDER PINAKI
Modified Pulse Oximetry Technique For Measurement Of Oxygen Saturation In Arterial And Venous Blood
A method for the measurement of oxygen saturation in arterial blood SaO2 by means of pulse oximetry without calibration is described. Photoplethysmography (PPG) is measured in three wavelengths in the infrared and for each PPG curve the relative change in light transmission is obtained. Two equations, each relating SaO2 to the ratio of the relative changes in light transmission for two wavelengths, using the values of the extinction coefficients of oxygenated and deoxygenated hemoglobin for the three wavelengths, enable the determination of SaO2, assuming linear dependence of the optical path-length on the wavelength, for the three wavelengths in the infrared. Similar technique for the determination of oxygen saturation in venous blood from changes in light transmission due to changes in venous blood volume is suggested
Owner:JERUSALEM COLLEGE OF TECHNOLOG
Method for determining commutation failure of multi-infeed direct current power transmission system
ActiveCN103812129AImprove accuracyThe judgment process is simpleElectric power transfer ac networkExtinctionThree-phase
The invention provides a method for determining commutation failure of a multi-infeed direct current power transmission system. The method is characterized by comprising the steps of calculating the extinction angle of an inverter station in the system in case of three-phase short-circuit grounding and single-phase short-circuit grounding of each node based on a nodal impedance matrix and by virtue of a node voltage interaction factor, and determining whether the direct current system fails in commutation with a critical extinction angle as the criterion. Besides, the calculation results of all the nodes are integrated, and a three-phase critical failure impedance boundary and a single-phase critical failure impedance boundary are delimited on a network topology, respectively. The minimum extinction angle is taken as the determination criterion of the method for the commutation failure, and an alternating current system area causing the commutation failure of the direct current system during a fault can be determined quickly and accurately through simple calculation by virtue of the critical failure impedance boundaries, and the accuracy of the determination method is improved while the determination process of the commutation failure is simplified. The influence, caused by a fault of an alternating current system, on the direct current system can be determined and analyzed clearly and visually.
Owner:NORTHEAST DIANLI UNIVERSITY +1
Method and system for estimating inhalable particles based on HJ-1 satellite
InactiveCN102539336AAccurate analysisLow costMaterial analysis by optical meansElectromagnetic wave reradiationAtmospheric airExtinction
The invention discloses a method for estimating inhalable particles based on an HJ-1 satellite. The method comprises the following steps of: 1, inverting the optical thickness of an aerosol in a target area by original data which are acquired by charge coupled device (CCD) cameras of an HJ-1A satellite and an HJ-1B satellite, and interpolating and smoothing the optical thickness of the aerosol inthe target area; 2, acquiring the height of an atmospheric boundary layer through a laser radar, and vertically correcting the interpolated and smoothed optical thickness of the aerosol according to the height of the atmospheric boundary layer to obtain an extinction coefficient of a near-surface aerosol; 3, acquiring near-surface relative humidity by observation of a weather instrument, and performing humidity correction on the extinction coefficient of the near-surface aerosol to obtain the extinction coefficient of a dried near-surface aerosol, wherein the extinction coefficient is not influenced by moisture absorption growth; and 4, converting the extinction coefficient of the dried near-surface aerosol into the concentration of near-surface inhalable particles. The method has the advantage that: by continuously and dynamically acquiring atmospheric information through satellite remote sensing, the space distribution of the inhalable particles in a large area can be reflected comprehensively and dynamically.
Owner:SATELLITE ENVIRONMENT CENT MINIST OF ENVIRONMENTAL PROTECTION
AOM modulation techniques for facilitating pulse-to-pulse energy stability in laser systems
ActiveUS20050270631A1Facilitate substantially full extinctionAvoid energySoldering apparatusOptical devices for laserLoop controlExtinction
Digital control of frequency and / or amplitude modulation techniques of an intracavity and / or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); facilitate laser pulse amplitude stability through closed-loop control of pulse-to-pulse laser energy; facilitate beam-positioning control including, but not limited to, closed-loop control for applications such as alignment error correction, beam walk rectification, or tertiary positioning; and facilitate employment of more than one transducer on an AOM (60) to perform any of the above-listed applications.
Owner:ELECTRO SCI IND INC
Vehicle communication method based on blockchain technology in vehicular ad hoc network
ActiveCN107508859ACertified Safe and EfficientEncryption apparatus with shift registers/memoriesUser identity/authority verificationRelevant informationExtinction
The invention provides a vehicle communication method based on a blockchain technology in a vehicular ad hoc network. The method comprises the steps as follows: a block chain in the vehicular ad hoc network is arranged for a road section, a vehicle in a road section acquires road condition information to be sent, and a trust value of the road condition information is acquired according to trustworthiness information of the vehicle; the vehicle packages the road condition information and the trust value of the road condition information into a block, and the blocks having the same road condition information in the same road section are connected to form one block chain by the vehicles; each vehicle in the road section downloads each block in the block chain, acquires the road condition information and the trust value of the road condition information in the block, and comprehensively judges the trustworthiness of the road condition information according to the trust value of the road condition information and related information of the block chain. According to the method provided by the invention, the user trustworthiness measurement mechanism, a message classification mechanism, a VANET block chain formation and extinction mechanism are combined, and safe and efficient authentication of the messages is achieved by using a VANET block chain technology under the premise of protecting user privacy.
Owner:BEIJING JIAOTONG UNIV
An inversion method for laser radar data of atmospheric particulate matter particle size spectrum spatial and temporal distribution
ActiveCN103234877AAchieving Simultaneous ExtractionGet Optical PropertiesParticle size analysisParticulatesExtinction
The present invention discloses an inversion method for laser radar data of atmospheric particulate matter particle size spectrum spatial and temporal distribution. The method comprises: by measuring back scattered echo signal of atmospheric particulate matters via laser radar, accurately inverting to obtain extinction coefficients of atmospheric particulate matters in three wavelengths of infrared, visible and ultraviolet bands at different heights from the ground; building lognormal distribution spectral functions of four aerosol components and parameters thereof, for obtaining refractive indexes at different bands of different aerosols and the mixing ratio of the four aerosol components in different aerosol modes; obtaining the particle size spectrum normalized at 0.55 micron of the extinction coefficient of each aerosol basic component, and comparing with a standard spectrum for authentication; and finally performing iterative calculation to the extinction coefficient spectrums obtained by laser radar surveying to obtain the aerosol mixed volume ratio of each height, thus obtaining atmospheric particulate matter particle size distribution of different heights at different times. According to the inversion method of the invention, valid data are provided for analysis and study of particle properties and variation patterns, especially, an effective means for spatial and temporal change detection for the particle-size spectrum of the atmospheric particulate matters is provided, and active three-dimensional telemetry technology suitable for atmospheric particulate matter particle size distribution is established.
Owner:HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
Method for comprehensively treating ecological environment of coal gangue hill
InactiveCN101519966AReduce flowAvoid formingUnderground miningSurface miningRevegetationEcological environment
The invention relates to a method for comprehensively treating the ecological environment of a coal gangue hill, which belongs to the field of mineral waste treatment and ecological environment restoration. The method mainly solves the problems of fire extinction, fire prevention and vegetation construction of the coal gangue hill. The method comprises the steps: the on-site reconnaissance of the coal gangue hill is carried out, and a construction operation plan is established; with fire prevention as principal and the combination of fire prevention and fire extinction, the fire prevention is crucial and is combined with the fire extinction, a thin layer of slurry is firstly sprayed on the coal gangue hill by a mechanical method to completely seal to form a sealing layer (8), transition slurry is sprayed on the sealing layer (8) to completely cover the sealing layer (8) to form a transition layer (9), slurry containing grass-shrub vegetation is spayed on the transition layer (9) to completely cover the transition layer (9) to form a planting layer (10); the contour line girdle band type operation in the spraying process is carried out from bottom to top to gradually and completely cover the hill, and different operating modes are selected according to practical conditions. The invention can not disturb the structure of the coal gangue hill, takes the fire prevention as the principal, combines the fire prevention with the fire extinction, has good and durable fire prevention effect, uses reliable and effective fire prevention and fire extinction measures as guarantee conditions to construct the planting layer, adopts grass-shrub plants, carries out hill sealing management and ensures vegetation restoration; in addition, the method uses the prior specialized mechanical devices to carry out construction operation, is easy to implement, has little difficulty, high efficiency and low investment and can ensure treatment effect.
Owner:赵平 +1
Restoration apparatus for weather-degraded image and driver assistance system
In a restoration apparatus, an estimating unit divides a captured original image into a plurality of local pixel blocks, and estimates an luminance level of airlight in each of the plurality of local pixel blocks. A calculating unit directly calculates, from a particle-affected luminance model, a luminance level of each pixel of each of the plurality of local pixel blocks in the original image to thereby generate, based on the luminance level of each pixel of each of the plurality of local pixel blocks, a restored image of the original image. The particle-affected luminance model expresses an intrinsic luminance of a target observed by the image pickup device as a function between the luminance level of airlight and an extinction coefficient. The extinction coefficient represents the concentration of particles in the atmosphere.
Owner:DENSO CORP
Nonvolatile memory device and method for producing the same
InactiveUS20060065919A1Reduce voltageImprove data retentionTransistorSolid-state devicesExtinctionPeak value
To provide a nonvolatile memory device suppressing a reduction of a data retention characteristic even if charges injected and stored into a local area of a nitride film is redistributed to achieve a reduction of voltage, the nonvolatile memory device in which hot electrons are injected into the local area of the nitride film at one or both of source•drain regions side to store data in a memory transistor is satisfied with a standard for evaluating a film quality of the nitride film, the standard being defined by one of the followings: a density of the bond group of silicon and hydrogen being under 1×1021 cm−3; an extinction coefficient in an ultraviolet region at a wavelength of 240 nm being under 0.10 or the extinction coefficient in 230 nm being under 0.14; an optical energy, a peak wavelength of an luminance spectrum, or a peak energy thereof.
Owner:SONY CORP
Limited play optical storage medium, method for making the same
InactiveUS20050013232A1Timely controlEnhance limited playabilityLayered productsPhotomechanical apparatusExtinctionFiltration
In one embodiment, a limited play optical storage medium for data comprises: a reflective layer, a control portion comprising an optically transparent polymeric resin and a light absorbing material, wherein the control portion has a light transmission of greater than or equal to about 70% at 650 nm, a curing index of greater than or equal to about 0.1 and a filtration index of greater than or equal to about 2.5, and wherein the light absorbing material has a minimum extinction coefficient (measured in CH2Cl2 solution) at 600 nm of greater than or equal to 1,500 mol−1·cm−1·L, a maximum extinction coefficient (measured in CH2Cl2 solution) at 650 nm of less than about 1,000 mol1·cm−1·L, a ratio of extinction coefficient at 650 nm to 600 nm less than about 0.1, and a reactive layer disposed between the reflective layer and the control portion, wherein the reactive layer is designed to limit the time during which data on the medium (disposed on a side of the reactive layer opposite the control portion), can be accessed after exposure to oxygen.
Owner:GENERAL ELECTRIC CO
Polycarbonate system having enhanced weatherability and method of making same
InactiveUS20070104956A1Enhanced abrasion resistance and ultraviolet resistance featureGood weather resistanceSynthetic resin layered productsVehicle componentsExtinctionUltraviolet
A polycarbonate system having enhanced weatherability is disclosed. The polycarbonate system comprises a substrate comprising a first surface and a second surface, a primer disposed on the first surface of the substrate, and a top coat disposed on the primer on the first surface for abrasion resistance. At least one of the primer and the top coat comprises an ultraviolet absorber in a solvent for ultraviolet absorption, the ultraviolet absorber having an extinction coefficient of ≧45,000 L-mol−1 cm−1 at λ=325 nm.
Owner:EXATEC LLC
Microarray synthesis instrument and method
InactiveUS20070037274A1Minimizes reflected lightEfficient use ofBioreactor/fermenter combinationsMaterial nanotechnologyDNA microarrayOligomer
During the light illumination period of a monomer addition cycle in synthesizing an DNA microarray, undesirable reflections of illumination light from various interfaces that the illumination light passes through near the synthesis surface of the substrate may reduce the light-dark contrast, and negatively affect the precision and resolution of the microarray synthesis. The present invention provides an flow cell that reduces the undesired reflections by constructing certain flow cell structures with materials that have similar refractive indexes as that of the solution that is in the oligomer synthesis chamber during the illumination period and / or constructing certain flow cell structures or covering the structures with a layer of a material that has a high extinction coefficient.
Owner:ROCHE NIMBLEGEN
Method for producing colorant excellent in color development
There is provided a method for producing colorants which can exhibit excellent color development even in a small amount and are low in thixotropy.The constituent feature of the present invention comprises:enhancing the molecular extinction coefficient of the coloring matter substance by ion exchanging method, to afford a room for increasing B (resin) of P / B;then a composition is designed and employed to enhance the effect increasing the polar group concentration which is a role of resin and the quality of the effect;it thus becomes possible to achieve the limit value of the molecular extinction coefficient as much as possible and to eliminate the factors adversely affecting the present process.
Owner:TAISEI HLDG CO LTD
Digital camera and digital camera system
ActiveUS20100201853A1Improve image qualityMinimum of spurious resolution•colorTelevision system detailsTelevision system scanning detailsCamera lensExtinction
A digital camera includes: a lens unit that forms a subject image on an imaging plane; an image sensor that includes color filters each disposed at one of pixels disposed in a lattice-like pattern over pixel intervals (a, b) along two directions, an x direction and a y direction, extending perpendicular to each other, with color filters corresponding to a first color component among first through nth (n≧2) color components, disposed in a checkered pattern at pixels amounting to at least half an entire color filter density and color filters corresponding to remaining color components disposed at other pixels, and outputs image signals expressing the subject image; and an optical low pass filter unit at which light having passed through the lens unit and yet to enter the image sensor undergoes light beam separation along two diagonal directions ((1 / 2)a, (1 / 2)b)×(√2 / α) and ((1 / 2)a, −(1 / 2)b)×(√2 / α) relative to (x, y) coordinate axes, so as to achieve frequency modulation for the subject image to become extinct at a band formed by connecting spatial frequencies (α / (2a), 0) and (0, α / (2b)) at positions calculated by multiplying, by a multiplier α, a Nyquist frequency 1 / (2a) and a Nyquist frequency 1 / (2b) at the image sensor assumed respectively along the x direction and the y direction. When the pixel intervals (a, b) assumed along the two directions at the image sensor are both within a 2.5˜5 μm / pixel range, a position of an extinction frequency band is set for the optical low pass filter by setting the multiplier α for the Nyquist frequencies at the image sensor within a range of 1.5≦α≦3.5.
Owner:NIKON CORP
Method for estimating visibility of single fog-degraded image
ActiveCN104809707AGood estimateImprove estimation accuracyImage enhancementImage analysisVisibilityImaging processing
The invention provides a method for estimating visibility of a single fog-degraded image on the basis of scene depth. The visibility serves as a basic element of meteorological observation and is an important evaluation index in the field of fog-degraded image processing. The traditional visibility testing method depends on hardware facilities such as atmospheric transmission instruments, and multi-point manual observation is required. The method is used for estimating transmissivity on the basis of an atmospheric degradation physical model, the scene depth is estimated by a scenery depth estimation method, and an atmospheric extinction coefficient is solved according to a principle of a visibility measuring instrument. Probability statistic thinking is adopted, the visibility on a single pixel point is estimated, the probability of the visibility of pixels of different grades is counted according to the grade of the visibility in foggy days, and the visibility of the single fog-degraded image is estimated. By the method, only the single fog-degraded image is estimated, calculation is simple, the estimation accuracy is high, hardware facilities are not required, and manual operations are reduced. The method can be used for effectively evaluating a defogging effect in a foggy day image sharpening system.
Owner:SOUTHWEAT UNIV OF SCI & TECH
AOM modulation techniques employing transducers to modulate different axes
ActiveUS20050270629A1Facilitate substantially full extinctionFacilitate laser pulse energySoldering apparatusOptical devices for laserLoop controlExtinction
Digital control of frequency and / or amplitude modulation techniques of an intracavity and / or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); facilitate laser pulse amplitude stability through closed-loop control of pulse-to-pulse laser energy; facilitate beam-positioning control including, but not limited to, closed-loop control for applications such as alignment error correction, beam walk rectification, or tertiary positioning; and facilitate employment of more than one transducer on an AOM (60) to perform any of the above-listed applications.
Owner:ELECTRO SCI IND INC
Organic dye with five-element heterocycle and derivative thereof as conjugate unit, and dye sensitization solar cell prepared thereby
ActiveCN101407639APromote absorptionSimple structure and easy accessLight-sensitive devicesMethine/polymethine dyesOrganic dyeCyanoacetic acid
The invention provides an organic dye which uses five-membered heterocyclic ring, derivatives thereof and a dye-sensitized solar cell prepared by the organic dye. The dye uses the five-membered heterocyclic ring or the derivatives thereof as a Pi unit, uses substituted triarylamine as an electron donor, uses cyanoacetic acid structure as an electron acceptor, and belongs to molecule of D-Pi-A structure. The dye molecule belongs to pure organic compounds, the structure of the materials is simple and is easy to be obtained; expensive materials of metal of Ru and purifying agent of polydextrose do not need to use, the compound yield is higher, so the total yield is between 40 percent and 70 percent; besides, the performance of spectral absorption and molar extinction coefficient and the like of the dye are excellent; and the peak value of the spectral absorption is over 550nm at the most, the molar extinction coefficient is over 48000M<-1>cm<-1>, the peak value and the coefficient are more than the Ru dye, therefore, the dye has wider absorption range to the sunlight. The dye-sensitized solar cell prepared by the organic dye has the maximum of quantum conversion efficiency of 97 percent and the highest photoelectric conversion efficiency of more than 8.0 percent.
Owner:CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
Photoelectric conversion material, film containing the material, photoelectric conversion device, method for preparing photoelectric conversion device, method for using photoelectric conversion device, photosensor and imaging device
ActiveUS20130181202A1Improve collection efficiencyHigh speed response propertyOrganic chemistryMethine/polymethine dyesDeposition temperatureExtinction
There is provided a compound represented by a specific formula, which has an absorption maximum at 400 nm or more and less than 720 nm in a UV-visible absorption spectrum, wherein a molar extinction coefficient is 10,000 mol−1·l·cm−1 or more at the absorption maximum wavelength, and a difference between a melting point and a deposition temperature (a melting point−a deposition temperature) is 31° C. or more.
Owner:FUJIFILM CORP
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