103results about How to "Extended collection time" patented technology

A method, device and system for determining a receiver location using weak signal satellite transmissions. The invention involves a sequence of exchanges between an aiding source and a receiver that serve to provide aiding information to the receiver so that the receiver's location may be determined in the presence of weak satellite transmissions. With the aiding information, the novel receiver detects, acquires and tracks weak satellite signals and computes position solutions from calculated pseudo ranges despite the inability to extract time synchronization date f, 'n the weak satellite signals. The invention includes as features, methods and apparatus for the calibration of a local oscillator, the cancellation of cross correlations, a Doppler location scheme, an ensemble averaging scheme, the calculation of almanac aiding from a table of orbit coefficients, absolute time determination, and a modified search engine.

The invention relates to a scan type automatic zooming iris image acquisition system and acquisition method, wherein the acquisition system comprises an image acquisition unit and a control unit; the image acquisition unit comprises a camera, a chilled mirror, a light source, a focus-variable optical lens set and an image acquisition card; the control unit comprises a light source control circuit, a zooming motor control circuit, a zooming motor and a computer; the chilled mirror, the focus-variable optical lens set and the chilled mirror are connected together in turn with the central axial lines being at one straight line; the light source which is positioned around the chilled mirror is used to illuminate the eyes of acquisition object; the zooming motor which is connected with the focus-variable optical lens set is used to regulate the imaging distance of the focus-variable optical lens set to move between farthest and nearest positions; the image acquisition card is used to receive images collected by the camera and to transmit the images to the computer; the computer controls switch on/off of the light source through the light source control circuit; the zooming motor control circuit connects the zooming motor and the computer, while the computer controls the zooming motor control circuit to make the zooming motor rotate. The invention has the advantages of a simple structure, low cost and short acquisition time.

Apparatus, systems and methods are described for preconcentrators, chemical sensing systems and gas chromatographs. A preconcentrator is described that comprises a hollow enclosure containing a sorbent material. The enclosure may be a capillary tube that can be formed in to a desired shape and that may be heated. Heating may be accomplished by passing an electrical current through the capillary or other hollow enclosure form. The sorbent material can be a liquid, a solid, a porous ceramic material and/or a chemiselective polymer. The sorbent material can be coated to the inner wall of the enclosure. The hollow enclosure may be maintained in an insulated chamber. The preconcentrator acts to concentrate a vapor passed through the preconcentrator to a chemical sensing array that can detect chemicals present in the vapor. A gas passed through the hollow enclosure can provide a chemically concentrated input to a chromatographic column.

An aerated compost and waste collection bin is disclosed. The bin includes a body portion having a bottom, at least one sidewall from the bottom, and an open top forming a container. A perforated tube extends upwards from the bottom of the body portion. At least one lateral vent tube is connected to the perforated tube and the sidewall of the body portion. The lateral vent tube allows air to circulate from outside the body portion of the bin through to the perforated tube.

The invention discloses a multi-source remote sensing data classification method for extracting classification sample points based on an unmanned aerial vehicle, and the method comprises the steps: uniformly extracting the classification sample points from aerial photos of the unmanned aerial vehicle, and carrying out the preparation and calibration of each type of sample points; obtaining a classified remote sensing data set, performing image processing on the remote sensing data set, and performing geographic positioning on the classified sample points according to the classified remote sensing image data set, wherein the classified remote sensing data set comprises a microwave data Sentinel-1 data set, a multispectral Sentinel-2 data set, a vegetation index data set based on the Sentinel-2 data set and a digital elevation model data set; and obtaining a classification result by utilizing a random forest classification model through the classification sample points with the geographic space information positioning. According to the multi-source remote sensing data random forest classification method based on the classification sample points extracted by the unmanned aerial vehicle, the earth surface type classification drawing process can be rapidly, effectively and cheaply realized; and meanwhile, after the influence of edge classification sample points is eliminated, the classification precision is obviously improved, and particularly, the precision of the kappa coefficient is better.

A non-coherent technique employs a zero padded FFT for the fast acquisition of direct sequence spread spectrum signals in the presence of large Doppler shifts. The application of a FFT to code acquisition results in decreased acquisition time, and can improve the probability of detection. A set of partial correlators (1) and a zero padded FFT (2) are used to reduce the search region for code acquisition while maintaining good frequency resolution for Doppler offset. This approach will prove most pertinent in future reconfigurable terminals.

The invention relates to a method for continuously separating alpha-pinene and beta-pinene from turpentine. The method comprises the following steps: raw materials are subjected to a preheating treatment; a packed tower vacuum rectification process is carried out; alpha-pinene is collected with a reflux ratio of 8:1-10:1; a middle fraction is slowly collected with a reflux ratio of 20:1-30:1; beta-pinene is collected with a reflux ratio of 8:1-15:1; and when distillation is finished, while the rectification tower is not cooled and the vacuum state is not relieved, discharge is realized through the pressure difference between a tower kettle and a residual liquid tank. Therefore, intermittent distillation continuous operation is realized. With the method provided by the invention, the content of obtained alpha-pinene can be 98%, and the content of obtained beta-pinene can be 95%.

The invention relates to a cargo collection scheduling method and device, and belongs to the technical field of data processing, and the method comprises the steps: enabling a plurality of collectionaddresses to be converted into latitude and longitude coordinates, and judging whether each latitude and longitude coordinate meets a clustering condition or not; Taking each collection address corresponding to each latitude and longitude coordinate meeting a clustering condition as a clustering center, and generating a polygonal collection area by using each clustering center; When it is monitored that a to-be-collected order exists in the polygonal collection area, judging a clustering center to which the to-be-collected order belongs according to a collection address of the to-be-collectedorder; And judging whether a cargo receiver exists in a preset range of a clustering center to which the to-be-received order belongs, and distributing the to-be-received order to the cargo receiver when judging that the cargo receiver exists in the preset range. According to the method, the cargo distribution time can be saved, and the timeliness of distribution of the to-be-received orders is improved.

The invention provides a modeling method and device based on point cloud data, electronic equipment and a storage medium, belonging to the technical field of three-dimensional panorama. The method comprises the steps: acquiring three-dimensional point cloud information of a scanning target collected by point cloud collection equipment and first time information thereof, rotation position information of a motor and second time information; and determining rotation position information according to the first time information and the second time information, acquiring scanning target position information based on the three-dimensional point cloud information and the rotation position information, and constructing a three-dimensional panoramic model corresponding to the scanning target. According to the method, the device, the electronic equipment and the storage medium in the invention, the placement position of the point cloud data in the three-dimensional panoramic model can be accurately determined, errors generated by motor operation can be eliminated, the collection time of the point cloud data can be prolonged, modeling efficiency can be improved, the accuracy and quality of three-dimensional panoramic model construction are improved, and customer experience is improved.

An apparatus encodes a signal for providing an MPEG-2 encoded signal having associated initialization data such as I-frames; and transmits the signal, wherein the transmitted signal occurs in bursts for conveying the MPEG-2 encoded signal, wherein each burst has a duration and occurs in a time slicing cycle, each time slicing cycle comprising at least the burst duration and an off-time, and wherein at least one I-frame is conveyed in a burst and repeated in every following burst until a new I-frame is received for transmission.

The invention belongs to the technical field of laser cutting and discloses a full-automatic laser cutting system and a control method. A rotating module carries out space rotating on an article to becut. A laser transmitting module transmits laser. A center control module extracts sample data in a database of the article to be cut. A setting module sets a pattern of the article to be cut. An angle adjusting module adjusts the angle between a laser light path and the article to be cut after a modulation module is utilized for carrying out modulation. A cutting module carries out cutting. According to the system and the control method, the service life of the motor is prolonged, and the production cost is reduced; meanwhile, the cutting module controls a laser head to move according to thecutting depth curve so as to cut the article to be cut, and the cutting depth of the article to be cut adapts to the cutting depth curve; and accordingly, a laser cutting machine adopting the cuttingmethod can machine grooves with equal groove depths, and thus adaptability of the laser cutting machine is good.

The invention provides a residual film recycling device. According to the main technical scheme, ground wheels are arranged on a frame and are used for supporting and walking; a film lifting part comprises a cover body and a conveying belt; the conveying belt is arranged in the cover body; the cover body is provided with an inlet and an outlet, the inlet is provided with a film lifting shovel, andthe film lifting shovel is used for lifting mulching film in soil or the surface of the soil into the cover body; the conveying belt is provided with multiple thorns, and the thorns are used for lifting the mulching film in the cover body; a baseboard of the cover body is provided with multiple holes and is used for shaking the soil off; a collecting part comprises a blower and a collecting box;an opposite first end and second end are arranged at the bottom of the collecting box, and the first end is hinged to a frame; the outlet is movably connected to the collecting box; the blower is arranged on the cover body, and the air outlet direction of the blower faces the conveying belt, so that the film on the conveying belt is separated from the thorns, flies out of an outlet and enters thecollecting box; one end of a lifting oil cylinder is fixedly connected to the second end, and the other end of the lifting oil cylinder is fixedly connected to the frame; when the lifting oil cylinderlifts, the collecting box rotates around the first end, and the mulching film in the collecting box is removed.

The invention provides a data quality evaluation method based on an information entropy value, which is used for evaluating a data set before modeling data, and comprises the following steps of: performing data volume evaluation on the data set required by modeling to obtain a data volume evaluation score; evaluating the effectiveness of the factors in the data set on the basis of the data volumeevaluation result to obtain factor evaluation scores; evaluating a dependent variable in the modeling data to obtain a dependent variable evaluation score; and obtaining a comprehensive score of the data set by utilizing the data volume evaluation score, the factor evaluation score and the dependent variable evaluation score, and judging the quality of the data set by taking the comprehensive score as a basis to obtain a judgment result of the quality of the data set.

The invention discloses a system and method for measuring gas parameters by utilizing a laser spectrum. In the system for measuring the gas parameters by utilizing the laser spectrum, a locking device locks wavelength of a laser signal emitted by a laser output head of a first laser generator to be at a center position of an absorption line of a target molecule in a target molecule sample cell in which a first locking channel is located, a control device acquires the laser signal which is emitted by the laser output head of the first laser generator, is detected by a detector and enters into a receiving light path device and a sample measuring channel as well as a laser signal which is emitted by the laser output head of a second laser generator and enters into the sample measuring channel, analog-digital conversion is carried out on the acquired laser signals, and concentration of the measured target gas is measured according to analog-digital conversion result. The measuring speed of the system is restricted by the time for the control device to acquire data while minimum of the current time for acquiring data is in microsecond, and response time of a laser demodulation frequency is greatly improved compared with the prior art, thus the measuring speed is improved and time consumption is reduced.

The invention relates to solar energy focusing utilization, in particular to a solar drying system which can be used for realizing solar energy collection by solar mirrors adopting dot focusing and is applied to the focusing and tracking of solar energy. The invention provides a fixed dot array solar drying system. The solar drying system comprises at least one solar mirror or one group of solar mirrors adopting dot focusing, at least one dryer and a tracking control device, wherein the solar mirrors are arranged on a solar mirror bracket, the dryers are arranged in a dotted region focused by the solar mirrors and arranged above or below the solar mirrors, and the focus lengths of the solar mirrors vary in the solar tracking process and are always kept in the dotted regions of the dryers; and the sunlight is focused by the solar mirrors to at least one dryer or a solar photo-thermal converter of the dryer under the control of the tracking control device when the sunlight varies, the dryers do not move with the solar mirrors in the solar tracking process of the solar mirrors, the dyers are kept static relative to the ground, and the tracking and focusing utilization of the solar energy is realized.