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401results about How to "Increase catch rate" patented technology

Laser radar for long-distance object detection

ActiveCN105487082ASmall sizeImprove the probability of captureElectromagnetic wave reradiationObject detectionLight detection
The invention relates to a laser radar for long-distance object detection. The laser radar comprises a laser and visible light detection system, a laser emitter and a processor. The laser and visible light detection system comprises a main system lens, a splitter, a visible light optical detection system and a laser detection system; laser and visible light reflected by the surface of an object is collected by the main system lens, and split by the splitter; laser is input to the laser detection system then, and the laser detection system sends time when the laser reaches the laser detection system to the processor; the visible light is input to the visible light optical detection system, and the visible light optical detection system sends image information to the processor; the processor calculates the distance of the object according to the laser arrival time received from the laser detection system; and the image information from the visible light optical detection system is received, and direction information of the object is calculated. According to the invention, optical systems of a visible light camera and a laser radar reception optical system are combined in use, the size of an active and passive combined detection reception optical system is reduced, and the weight of the system is also reduced.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY

OFDM/OQAM (Orthogonal Frequency Division Multiplexing/Offset Quadrature Amplitude Modulation) system and time frequency synchronization method thereof

The invention discloses an OFDM / OQAM (Orthogonal Frequency Division Multiplexing / Offset Quadrature Amplitude Modulation) system and a time frequency synchronization method thereof. The time frequency synchronization method comprises the following steps of: a coarse synchronization estimating step for estimating an estimated frequency offset value of a received baseband receiving signal frame sequence; a frequency offset compensating step for compensating the frequency offset of the received base band receiving signal frame sequence by using the estimated frequency offset value obtained by thecoarse synchronization estimating step; a fine synchronization estimating step for estimating an estimated time offset value of r2 (KTS) obtained by the frequency offset compensating step; and a timeoffset compensating step for compensating the time offset of the r2 (kTS) obtained by the frequency offset compensating step by using the estimated time offset value obtained by the fine synchronization estimating step so as to obtain r3 (kTS). In the invention, one-step synchronization is divided into two steps including coarse synchronization and fine synchronization; and the frequency offset of the baseband receiving signal frame sequence is first compensated by using the estimated frequency offset value obtained in the coarse synchronization and then the fine synchronization is carried out by using the compensated signal to obtain a final estimated time offset value so that the influence of CFO (Carrier Frequency Offset) during the fine synchronization is minimized and the time offsetestimation accuracy and the acquisition probability are improved.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Tumor cell capturing micro-fluidic chip and tumor cell capturing method

The invention discloses a tumor cell capturing micro-fluidic chip. The tumor cell capturing micro-fluidic chip comprises a base material and a microchannel formed inside the base material, wherein the microchannel extends along a smooth curve, an inlet and an outlet are formed in the two ends of the microchannel respectively, a microcolumn array is arranged in the vertical direction of the interior of the microchannel in a protruding mode, the microcolumn array is distributed in the extending direction of the microchannel, the end, located at the inlet, of the microcolumn array is attached to one side wall of the microchannel, and the end, located at the outlet, of the microcolumn array is attached to the other side wall of the microchannel; capture cavities with triangular cross sections are distributed in the middle of the microcolumn array at equal intervals into an array, and the three vertex angles of each capture cavity form three gaps which are 5 microns wide to be used for capturing one tumor cell 2-3 times. The chip can be used for capturing EpCAM expressed and unexpressed CTCs, EpCAM unexpressed and low-expressed CTCs and CTCs not connected with magnetic beads by means of the microcolumn array with 5 microns wide gaps.
Owner:SUZHOU WENHAO MICROFLUIDIC TECH CO LTD

Wet-type dust-removal fan

The invention discloses a wet dust removal fan, which comprises a wind-cone. The wind-cone consists of the wall of an outer cone and the wall of an inner cone which is provided with a plurality of through holes. A sandwich cavity is arranged between the wall of the outer cone and the wall of the inner cone; a flow port is opened at the bottom of the wall of the outer cone; a seeper box is connected with the lower part of the wall of the outer cone and is correspondent to the flow port; an outlet is arranged at the bottom of the seeper box; the inner wall of the inner cone is provided with a support which is equipped with an axle; the support is connected with the wind-cone and is arranged between a water injection nozzle and a fan wheel, and the axle is provided with at least a separating blade. The wet dust removal fan has the advantages of high purification efficiency in the practical application, low operational cost, notable energy saving effect and no frequent maintenance, which completely solves the problems that large resistance of the dust removing system exists owning to a filter screen, the handling ability of blast volume is bad, the increasing of the loading of a fan motor is directly affected by the dust capacity adsorbed of and the fan motor is burnt down easily owing to the phenomenon of blocking, thus ensuring the operation safety and work efficiency of the fan motor.
Owner:郭峰

Intravascular thrombus withdrawing device

The invention provides an intravascular thrombus withdrawing device. The intravascular thrombus withdrawing device comprises a thrombus withdrawing system and a delivery system. The intravascular thrombus withdrawing device is characterized in that the thrombus withdrawing system comprises a thrombus pushback component and a thrombus storage and sealing component, the delivery system comprises a push component and a control component, the push component far end is connected to the thrombus sealing component, the control component far end is connected to the thrombus pushback component, the thrombus pushback component can be released at the far end of a target thrombus, and the thrombus storage and sealing component can be released at the near end of the target thrombus. By keeping the push component constant, the control component is pushed back toward the near end direction so as to make the thrombus pushback component push the target thrombus enter the thrombus storage and sealing component; moreover, the thrombus storage and sealing component can also partially or wholly enter the thrombus storage and sealing component of the near end, and finally the thrombus system wrapped with the target thrombus is withdrawn out of the body. The intravascular thrombus withdrawing device has the advantages that the thrombus catching rate is high, the thrombus does not easily fall off in the withdrawing process, the delivery system is good in flexibility, and harm to the blood vessel is small in the thrombus withdrawing process.
Owner:SHANGHAI ACHIEVA MEDICAL SUZHOU CO LTD

Circuit for rapidly capturing long period pseudo random spread spectrum code of satellite navigation receiver and capturing method thereof

The invention discloses a circuit for rapidly capturing a long period pseudo random spread spectrum code of a satellite navigation receiver and a capturing method thereof. The circuit comprises: a data preprocessing module, a sampling data control module, a frequency mixing module, a local spread spectrum code generation module and a single capturing engine. The single capturing engine comprises:a local spread spectrum code memory, a first stage coherent integral module, a first stage coherent data memory, a second stage coherent integral module, a third stage incoherent integral module and a threshold control comparison module. An output terminal of the data preprocessing module is connected with an input terminal of the frequency mixing module through the sampling data control module. The output terminal of the frequency mixing module is connected with one input terminal of the first stage coherent integral module. The local spread spectrum code generation module is connected with another input terminal of the first stage coherent integral module. The circuit of the invention has the following characteristics that: integral gain is high; an anti-electromagnetism interference ability is strong; a capturing sensitivity is high; capturing precision is high; a capturing false alarm rate is low; a capturing speed is fast; reliability is high. And there are many other characteristics.
Owner:CHENGDU GOLDENWAY TECH

Fishing device for cultured fishes

The invention relates to a finishing device for cultured fishes. The finishing device is arranged in front of a feeding platform and comprises at least three upright posts, a net cage and drag ropes, wherein two upright posts are vertically inserted into two sides of the feeding platform; other upright posts are vertically inserted into a pond; the upper ends of the upright posts are exposed out of the water surface by a certain length; rope penetrating pieces for the drag ropes to pass through are arranged at the upper ends of the upright posts; the net cage is arranged in an area defined by at least three upright posts; when the net cage is not subjected to tensile force of the drag rope, the net cage is sunken into the water bottom for a certain depth; the drag rope sequentially penetrates through each side of a net cage opening and the rope penetrating pieces at the upper end of the upright posts; two ends of the drag rope are used as operating ends at which the net cage is pulled up; when the drag rope is tightened, the net cage is raised; and when the drag rope is loosen, the net cage is sunken. The invention has the advantages of simple and ingenious structure, simpleness, convenience and feasibility for operation, high finishing amount, low production cost, high fishing rate for fishes, scientific fishing mode and low possibility of injuring fish bodies in the fishing process; the labor capacity for fishing can be greatly reduced; and large fishes can be fished and small fishes can be left.
Owner:FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI

Graphene modified composite mesoporous carbon microsphere air purifying preparation

The invention provides a graphene modified composite mesoporous carbon microsphere air purifying preparation. A certain amount of beta-cyclodextrin is added to thin-layered nano-SiO2 particles covering the surfaces of obtained micro-SiO2 particles, a certain quantity of obtained RGO/TiO2 nanoparticles is added simultaneously, -OH, -COOH, C-O-C and C=O oxygen-containing functional groups rich on the surface of graphene are adsorbed by and bonded with the RGO/TiO2 nanoparticles on the basis of the molecular recognition characteristic of beta-cyclodextrin, then a certain amount of CTAB (cetyltrimethylammonium bromide) surfactant is added, CTAB serving as a micelle stabilizer can stop the RGO/TiO2 nanoparticles from further hydrolysis and growth, and finally, the novel air purifying preparation adopting RGO/TiO2 supported by carbon microspheres with a mesoporous shell structure is obtained. With adoption of the scheme, the purity is high, RGO/TiO2 supported by the carbon microspheres with the mesoporous shell structure in powder is better in bonding performance, uniform in distribution and controllable in dimension at mesopores, and the air purifying preparation can be used for purifying polluted air and removing dust in a haze environment as well as photo-catalytically degrading and separating nitric oxide, sulfide or other organic pollutants in the polluted air.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS

Ground-space-based integral measurement and control system applied to terrestrial space

The invention discloses a ground-space-based integral measurement and control system applied to a terrestrial space. The system includes a ground measurement and control station; a relay satellite; anair vehicle including an upper antenna, a lower antenna, a radio frequency front end, a transceiving assembly and an air vehicle management computer, wherein the upper antenna and the lower antenna are used for receiving and transmitting of ground-base uplink and downlink signals and space-based forward and backward remote control signals; the radio frequency front end is used for performing filtering hybrid amplification on signals and outputting the signals; the transceiving assembly is used for conversion through modulation and demodulation and for receiving CCSDS remote measurement framesor acquiring positioning information according to remote measurement parameters of the transceiving assembly itself and calculating the optimal direction transmission of the space-based forward remote control signals; the air vehicle management computer is used for transmitting the received positioning information and the calculated optimal direction of the space-based forward remote control signals to the radio frequency front end for transmission switching between the upper antenna and the lower antenna and transmitting selected space-based backward remote control signals to the relay satellite. According to the invention, a ground-based and a space-based remote measurement and remote control links can be implemented at the same time and whole course coverage of flight tasks is realized.
Owner:BEIJING SATELLITE INFORMATION ENG RES INST

Unmanned aerial vehicle resisting distributed networking detection method and device

The invention discloses an unmanned aerial vehicle resisting distributed networking detection method and device. The unmanned aerial vehicle resisting distributed networking detection method comprises the steps that at least two photoelectric infrared composite sensing detection assemblies are enabled to form an unmanned aerial vehicle resisting detection network; each photoelectric infrared composite sensing detection assembly determines the position thereof through a satellite positioning unit; a broadband active phased array radar unit in each composite detection assembly detects and discovers the position of an unmanned aerial vehicle to be detected; a visible light and infrared imaging unit in each composite detection assembly perform focused joint imaging on the unmanned aerial vehicle to be detected; and a plurality of positions of the unmanned aerial vehicles to be detected in the plurality of composite detection assemblies are fused to act as high-precision position output so as to complete stable and accurate tracking for the unmanned aerial vehicle to be detected accordingly, and a plurality of images of the unmanned aerial vehicle to be detected are fused to act as clear and complete image output so as to complete automatic and accurate recognition for the unmanned aerial vehicle to be detected accordingly. The unmanned aerial vehicle resisting distributed networking detection method has the advantages of convenient operation, wide detection area, high capturing rate, excellent positioning accuracy, high recognition rate and the like.
Owner:成都新越科技有限公司
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