35 results about "Particle cloud" patented technology

This invention comprises a method and system for displaying free-space, full color, high-resolution video or still images while simultaneously enabling the user to have real-time direct interaction with the visual images. The system comprises a self-generating means for creating a dynamic, non-solid particle cloud by ejecting atomized condensate present in the surrounding air, in a controlled fashion, into an invisible particle cloud. A projection system consisting of an image generating means and projection optics, projects an image onto the particle cloud. Any physical intrusion, occurring spatially within the image region, is captured by a detection system and the intrusion information is used to enable real-time user interaction in updating the image. This input/output (I/O) interface provides a display and computer link, permitting the user to select, translate and manipulate free-space floating visual information beyond the physical constraints of the device creating the image.

A method of modeling speech distinctions within computer-animated talking heads that utilize the manipulation of speech production articulators for selected speech segments. Graphical representations of voice characteristics and speech production characteristics are generated in response to said speech segment. By way of example, breath images are generated such as particle-cloud images, and particle-stream images to represent the voiced characteristics such as the presence of stops and fricatives, respectively. The coloring on exterior portions of the talking head is displayed in response to selected voice characteristics such as nasality. The external physiology of the talking head is modulated, such as by changing the width and movement of the nose, the position of the eyebrows, and movement of the throat in response to the voiced speech characteristics such as pitch, nasality, and voicebox vibration, respectively. The invention also describes modeling a talking head on the facial image of a particular individual.

An agglomerated particle cloud network coated fiber bundle containing a bundle of fibers and an agglomerated particle cloud network. The bundle of fibers contains a plurality of fibers and void space between the fibers. The agglomerated particle cloud network contains a plurality of agglomerated nanoparticles located in at least a portion of the void space in the bundle of fibers. The agglomerated nanoparticles form bridges between adjacent fibers. Between 10 and 100% by number of fibers contain bridges to one or more adjacent fibers within the agglomerated particle cloud network coated fiber bundle. The agglomerated nanoparticles form between about 1 and 60% of the effective cross-sectional area of the agglomerated particle cloud network coated fiber bundle.

The present invention provides a space debris low-cost removal method by using a ground-based electromagnetic launcher. The space debris low-cost removal method by using the ground-based electromagnetic launcher is characterized by concretely comprising the following steps: 1 launching a vehicle with particle clusters by adopting the electromagnetic launcher, and the vehicle forming a high-toss trajectory with the launching speed being less than the first cosmic speed, and the vertex of the high-toss trajectory of the vehicle being located at the area near a space debris orbit to be removed; 2, when the vehicle gets close to the vertex of the high-toss trajectory of the vehicle, the vehicle adjusting the posture, and when the vehicle is located at the vertex of the high-toss trajectory of the vehicle, the vehicle ejecting the particle clusters carried, to make the particle clusters to be spread evenly on the space debris orbit to be removed to form a particle cloud cluster; 3, the space debris to be removed colliding with the particle cloud cluster on the orbit to lose kinetic energy, and lowering the orbit step by step till falling into the atmosphere to be destroyed. The method adopts the ground-based electromagnetic launching, and has the advantages of low cost, high reliability and capability of being reusable, so that the debris removal cost can be greatly reduced.

The invention provides a map matching and locating method and system based on particle filter. The method comprises the following steps: disintegrating a feasible domain of an indoor environmental map into a rectilinear road feasible region and a cross region, and numbering paths contained in the regions; acquiring a particle cloud of a current location generated according to a PDR result and a number of the path at which the particle cloud of the current location is located; acquiring the current location of the particle cloud, variance of the current location, a step length, an estimated error of the step length, a course angle and an error of the course angle, updating a particle state, and obtaining the updated particle cloud; and according to the number of the path, judging a region in which a particle in the updated particle cloud is located, adjusting a weight of each particle in the updated particle cloud, and obtaining a locating result. By adopting the particle filter method, the particle cloud is established for the indoor environment map based on a locating solution and the error of the locating solution, and the locating solution is obtained in a way of adjusting and updating the particle cloud by virtue of the particle weight, so that the indoor location is realized, and the locating precision is improved.

The invention provides an efficient particle cloud drawing method in flight scene simulation. The method comprises the steps that 1) a particle cloud model library based on a bulletin board is constructed; 2) a circular area with the center of a viewpoint position is used as a visible area, and an area covered by a grid outside the visible area is used as a reserved area; 3) when a cloud block enters the visual area and the cloud block does not contain particle data, a cloud model is randomly selected from the particle cloud model library to generate the particle data of the cloud block based on the cloud model; when the cloud block moves away from the visual area and is located in the reserved area, the particle data are not deleted temporarily; when the cloud block moves away from the reserved area, the particle data are deleted; and 4) particle collection, sorting and drawing are carried out. The method can be used in flight scene simulation and a large-scale outdoor virtual reality system. The method can realize efficient cloud drawing, can simulate a variety of cloud morphology, and has a good simulation result.

The invention discloses a boiler soot blowing control device based on flue fly ash mass flow, which comprises a soot blower, a charge inducing sensor, a signal processing module and an industrial personal computer for controlling the soot blower, wherein the charge inducing sensor is installed in a tail flue of a boiler and used for measuring the induced current of a fly ash particle cloud cluster; the signal processing module is connected with the charge inducing sensor and used for carrying out A/D (Analog to Digital) conversion and filtering on the induced current to obtain flue fly ash mass flow M; and the industrial personal computer controls the work of the soot blower according to a signal transmitted by the signal processing module. The invention can be used for all coal-fired power plants, realizes control on the running of all pulverized coal boiler soot blowers and can maintain the stability of boiler hearth outlet temperature and main steam temperature, improve the boiler efficiency, reduce the boiler failure, prolong the service life of the soot blower, save the maintenance workload of the soot blower, and the like.

A quartz pitchfork type laser breakdown detection device comprises an optoacoustic absorption chamber, an excitation light source, a detection light source, a detection light modulation unit, a quartz pitchfork detector and the like. The quartz pitchfork detector comprises a resonating tube and a quartz pitchfork. During working, excitation light is focused and emitted to a to-be-detected substance, the to-be-detected substance generates a nano particle cloud cluster due to heating, the nano particle cloud cluster is diffused into the optoacoustic absorption chamber, detection light is absorbed by elements of the nano particle cloud cluster to generate an optoacoustic effect, acoustic energy accumulates in the resonating tube and is transmitted to the quartz pitchfork to output an electric signal, and accordingly, the content of a certain element in the to-be-detected substance is calculated. The quartz pitchfork type laser breakdown detection device has the advantages that laser induce breakdown and optoacoustic spectroscopy are combined, and detection limits of conventional laser induce breakdown methods are increased; the quartz pitchfork serves as the detector, and a detection system is simplified effectively; the optoacoustic absorption chamber is vacuumized, spectral line widening effect is low, detected spectral lines are easy to distinguish and low in noise, and accordingly, detection sensitivity is improved.

The invention provides an optoacoustic type laser breakdown detection device which comprises a detection light path system and an electric system, wherein the detection light path system comprises an optoacoustic absorption cavity, an excitation light source and a detection light source; a sample pond and a microphonic detector are arranged in the optoacoustic absorption cavity; when the device works, a to-be-measured substance is arranged in the sample pond, the excitation light is focused to enter the to-be-detected substance, the to-be-detected substance forms a nano particle cloud cluster which is diffused into the cavity, the detection light source enters the optoscoustic pond to be absorbed by the components in the nano particle cloud cluster so as to generate the optoacoustic effect, the content of the substances in the cloud cluster can be calculated by the sound wave strength detected by the microphonic detector, and further, the content of a certain component in the to-be-detected substance can be calculated. The optoacoustic absorption cavity is subjected to vacuum pumping during work, the excited nano particle cloud cluster is diffused in the cavity, and the pressure is small, so that the spectral line broadening effect is small, the detected spectral line can be easily distinguished from other spectral lines, the noise is low in the low-pressure state, and the optoacoustic type laser breakdown detection device has high sensitivity.

The invention discloses an absorption cavity type laser breakdown detection device which comprises an absorption cavity, an excitation light source, a detection light source, an acousto-optic modulation device, a light detector and an electronic control system for controlling the working process. According to the absorption cavity type laser breakdown detection device, a laser-induced breakdown technology and a light ring-down technology are combined; a sample to be detected is placed in a ring-down cavity; excitation light is focused and enters to the sample to be detected; under heat absorption, a nano particle cloud cluster is formed by the sample to be detected and is dispersed into the cavity; the detection light is reflected back and forth between high-reflectivity mirrors at the two ends of the ring-down cavity and is continuously absorbed by corresponding substances; the detector outside the cavity is used for detecting an emergent signal, so that the content of the substances can be calculated. By combination of the laser induced breakdown and light ring-down technologies, by use of the high-reflectivity mirrors, the detection extreme can be ppb level; before excitation light irradiation, the absorption cavity is vacuumized, so that interference of other components in air can be prevented, and widening of a spectral line can be reduced; therefore, the detected spectral line is easy to distinguish, and the flexibility is improved.

The invention discloses an integral high-temperature resistant sealing wave-transparent antenna cover. The integral high-temperature resistant sealing wave-transparent antenna cover comprises a coverbody and a cover plate, wherein a connection cylinder is vertically arranged below the cover body and is connected with airborne equipment, a lower part of the cover body and a connection cylinder arefixedly connected by an annular slope plate, a plurality of exhaust hole groups are formed in the annular slope plate, an exhaust hole shielding assembly is connected to the connection cylinder and is arranged above the exhaust hole groups, a cover body rotation assembly is arranged on the cover plate, and the cover body is fabricated by doping polyimide and quartz glass fiber according to a massratio being (1.5-2.5):(2.5-3.5). Compared with the prior art, the integral high-temperature resistant sealing wave-transparent antenna cover provided by the invention has relatively good aerodynamicperformance, salt mist and rainwater invasion is prevented, the difference between integral air pressure and external air pressure also can be balanced, radar check and maintenance can be facilitated,the integral high-temperature resistant sealing wave-transparent antenna cover has excellent thermal impact-resistant performance, high-temperature resistant performance, mechanical strength, appropriate elastic modulus and particle cloud invasion resistant capability, and the wide-screen wave transparency of the antenna cover is achieved.

The invention discloses a laser ablation sample chamber which comprises an inner cavity, an outer cavity and a sample feeding device. The inner cavity is provided with a first air inlet and a first air outlet. A sample inlet and a sample outlet are formed in the inner cavity. The sample feeding device comprises a sample supporting strip which penetrates through the inner cavity in a slidable mode through the sample inlet and the sample outlet, and a driving device connected with the sample supporting strip and used for driving the sample supporting strip to slide on a straight line where the sample inlet and the sample outlet are located. The inner cavity and the sample feeding device are arranged inside the outer cavity. The outer cavity is provided with a second air inlet and a second air outlet. According to the laser ablation sample chamber, automatic replacement of samples is achieved, the sample chamber does not need to be opened frequently, and therefore influences caused when the sample chamber is frequently opened on air ways in a laser ablation sample feeding system are avoided; meanwhile, the pressure difference between the interior and the exterior of the inner cavity is eliminated, and sample particle cloud leakage caused by the pressure difference between the interior and the exterior of the inner cavity is avoided.

A fluidized bed coating apparatus for coating liquid onto the surfaces of particles directed into a coating chamber. A liquid spray nozzle assembly disposed below a hollow separator within the coating chamber includes an ultrasonic atomizer for atomizing coating liquid into a fine liquid particle cloud and a pressurized air directing air cap for forming the ultrasonically atomized fine liquid particle cloud into a cone shaped spray pattern and propelling the liquid particles through the separator into an upbed region of the coating chamber for recirculation in an outbed region, and through the separator. A cooling air passageway system is provided within the spray nozzle assembly for cooing the ultrasonic atomizer during operation.

The invention discloses a visual experiment device and method for testing explosion characteristics of a powder/gas/liquid three-phase explosive mixed medium. The experimental device comprises a visual explosion container, an explosive liquid atomization generation system, an explosive gas preparation system, an explosive dust raising system, an ignition system, a pressure acquisition system, a temperature acquisition system, a flame ion acquisition system, an external measurement system and a program control and data acquisition system. The device can realize the construction of explosive dust/explosive gas/explosive liquid three-phase particle cloud, and studies the explosion characteristic and flame propagation behavior of powder/gas/liquid three-phase explosive particle cloud by analyzing the data such as explosion pressure, flame propagation speed, flame temperature, flame fine structure and the like. And the cold transient flow field characteristics of the powder/gas/liquid three-phase explosive particle cloud are obtained by using PIV and PDPA test instruments. The device can be used for researching the explosion characteristic of the multiphase explosive medium.

The invention relates to a relativistic electron beam transmission scheme design method and device, equipment and a medium. The method comprises the following steps: calling a background plasma environment space model; injecting the relativistic electron beam into a plasma channel by adopting an external injection method, and performing long-distance constraint on the relativistic electron beam by utilizing an excited tail wave field transverse field; adjusting transmission parameters of the relativistic electron beam, and performing transmission simulation; according to set boundary conditions, adopting a high-order particle cloud interpolation method to solve the current, adopting a fourth-order finite difference method to solve the Maxwell equation, and obtaining a simulation result of the relativistic electron beam after parameter adjustment through calculation; and determining an optimal simulation result according to the simulation result, and outputting a transmission parameter corresponding to the optimal simulation result as a relativistic electron beam transmission scheme design result, wherein the optimal simulation result is the simulation result when the beam spot of the relativistic electron beam is minimum, the energy collimation is optimal and the energy loss is minimum. The effect of efficient long-range stable transmission of relativistic electron beams is achieved.

The present invention diffuses air through a sea floor-mounted grid, raises particle clouds in four to twenty percent solutions to a height of one to four feet, and transports the particle cloud by favorable currents to designated locations upstream and downstream while releasing dissolved oxygen throughout the water column. The process is used in shallow depths, less that thirty-three feet (2 bars) with minimum favorable water currents of one-half to one knot. The sea floor-mounted grid is used for diffusion of air to alleviate hypoxic environments in depths less than sixty-six feet (5 bars.)

The invention discloses a hierarchy-based cloud representation and real-time drawing method covering a whole airspace, which is characterized in that a corresponding hierarchy detail representation and drawing method is set according to different distances of cloud layers, wherein the LoD0-LoD3 algorithms are respectively used for drawing cloud layers in a first-level distance range to a fourth-level distance range, and wherein the LoD0 algorithm is a traditional drawing method; the LoD1 algorithm comprises the following steps: giving a particle radius R and a number m, and calculating a coordinate axis alignment bounding box of a LoD0 particle set; randomly generating a plurality of new particles with the radius of R in the bounding box, and if the coincidence volume of the new particles and the particles in the LoD0 particle set is smaller than a set value h, or the coincidence volume of the new particles and other new particles is larger than a set value H, discarding the new particles; and adjusting the set values h and H, and finally leaving m new particles, wherein the LoD2 algorithm is an improved particle cloud real-time rendering algorithm, and the LoD3 algorithm is an atomization drawing method with noise.