44results about How to "The processing algorithm is simple" patented technology

The invention discloses an asynchronous network application program processing method. The method includes: establishing multiple threads, wherein each thread has a same operating logic; obtaining a global lock by one of the threads to obtain processing right to event queues; inquiring a to-be-processed event queue by the thread having the event queue processing right, and when to-be-processed events exist in the to-be-processed event queue, reading a to-be-processed event by the thread for processing the to-be-processed event; and when the to-be-processed event queue has no to-be-processed events, monitoring an event list by the thread, and when events are monitored by the thread, adding the events into the to-be-processed event queue. By establishing multiple equivalent threads and lock competing logics to the global lock among the multiple threads, compactness and efficiency in management of the multiple threads are realized, and software and hardware resources are saved; and by performing timeout processing through a compact thread model, a lightweight timer mechanism and a safe and efficient asynchronous information mechanism are realized.

A method for regulating a transmission of a quantity of user data between a plurality of users of a communication system via a field-bus system is provided, in which method the individual users communicate by way of data telegrams, each data telegram containing at least one destination address, one source address and a quantity of user data not exceeding a predefined, maximum quantity. In the event the maximum quantity of user data predefined for one data telegram is less than the quantity of user data to be transmitted, the quantity of user data to be transmitted is fragmented into a plurality of partial telegrams, and the respective partial telegrams are transmitted one after another in a defined sequence of partial telegrams.

The invention relates to a service flow access control and bandwidth allocation method based on an orthogonal frequency division multiplexing (OFDM) system, which mainly solves the problems of service flow access control and system bandwidth resource allocation in the OFDM system. The method of the invention essentially comprises the following steps: (1) carrying out access control according to the management information of dynamic service flow and generating a bandwidth-reserved distribution list; (2) distributing the bandwidth-reserved according to the bandwidth-reserved distribution list; and (3) distributing the rest bandwidth according to a weight factor configuration table. The method provided by the invention not only effectively improves the use efficiency of the system resources, but also ensures fairness among a plurality of service types and prevents 'starvation' phenomenon caused by that the bandwidth cannot be obtained due to the comparatively low priority of users.

The present invention discloses an estimation method and device of space arrival direction used in wireless communication system which applies the technique of intelligent antenna; an up-link time slot M and a renewal cycle T included in the calibration cycle are set; a time slot comprises one or more than one renewal cycle T; when the DOA estimation of space arrival direction is started, the counting unit calculates the up-link time slot in the calibration cycle and the renewal cycle in every up-link time slot; the calculation is carried out by a controller, based on the above calculating value, in the first renewal cycle of the first time slot of every calibration cycle, activating the searching machine of maximum power value to work out the DOA calibration value which is considered as the primary value or calibration value of DOA calibration; in other time of the calibration cycle, activating the arbiter of optimal demodulation signal to work out the DOA calibration value, realizing the follow of the DOA calibration value; the selector of DOA output value chooses the final DOA calibration value. The invention can lessen the complicated matrix manipulation, providing a much precise DOA calibration value.

The invention discloses a nudity bed rock information extraction method based on a soil index. Specifically, a holomorphy soil index and a normalized differential vegetation index are respectively calculated according to a red light band of a remote-sensing image and a near-infrared band, and a soil index chart and a normalized differential vegetation index are obtained. Nudity bed rock information is extracted according to characteristic differences of rock information and soil information in the soil index chart, and non-vegetation information is extracted through the normalized differential vegetation index chart. A picture element of the nudity bed information and the non-vegetation information is extracted to obtain the nudity bed rock information. According to the nudity bed rock information extraction method based on the soil index, a remote-sensing image picture is utilized, the extraction of the nudity bed rock information is achieved, bed rock nudity rate of a land parcel pattern spot can be analyzed based on the nudity bed rock information chart, and data support for karst area water and soil loss and stony desertification grading is provided. The nudity bed rock information extraction method based on the soil index has the advantages of being simple, fast, accurate and capable of not relying on an operator completely.

The present invention provides a control method and device for a manipulator arm based on monocular vision positioning. First, pixel coordinates of a target point of a target object in a pixel coordinate system are obtained, then the transformation is carried out by using a homogeneous transformation matrix of a camera coordinate system relative to the end of the manipulator arm and the homogeneous transformation matrix of the end of the manipulator arm relative to a world coordinate system. Then line of sight equations are obtained. Finally, in the world coordinate system, the plane equationof the plane where a target point is located is obtained, and the target point is obtained through the line of sight equations and the plane equations. Therefore, compared with the prior art, the embodiment of the invention does not need two monocular cameras, simplifies the positioning system, and has simple operation, and does not involve the matching of image feature points and the calculationof optimal distance, simplifies the processing algorithm and reduces the requirements for hardware equipment.

A signal processor receives a signal containing information about a sensor that is spirally wrapped at a known pitch or separation down a pipe having a flow; and determines a flow velocity based at least partly on the information contained in the signal received by applying an autocorrelation function that depends on a relationship between the time between a repeating pattern and the known pitch or separation of the spirally wrapped sensor. The signal processor provides a corresponding signal containing information about the flow velocity. The sensor includes a strain sensor, including a piezo-electric polymer strain sensor fabricated from PVDF, and/or two or more equally spaced spirally wound sensors. The determining includes correlating output signals of two or more equally spaced spirally wound sensors to determine a time delay, and determining the flow velocity based on the time delay and the known pitch or separation.

The invention discloses a yarn hairiness detection device. The yarn hairiness detection device comprises a yarn conveying device, a yarn image acquisition device and a yarn image processing device, wherein the yarn image acquisition device comprises an image acquisition chamber and an area-array camera and a stroboscopic face light source which are arranged in the image acquisition chamber; an amplification lens is arranged in front of the area-array camera; the area-array camera and the stroboscopic face light source are oppositely arranged on the two sides of the image acquisition chamber; through holes are symmetrically formed in the other two sides of the image acquisition chamber; yarns penetrate through the through holes and are output by a power leather roller, and the conveying direction of the yarns in the image acquisition chamber is vertical to the amplification lens; and the area-array camera is in data connection with the yarn image processing device. By virtue of the yarn hairiness detection device disclosed by the invention, an image processing process can be simplified, and the yarn image acquisition efficiency and the hairiness detection efficiency are improved.

The invention discloses a method for recognizing foreign matters in bottle-packed oral liquid, and the method comprises the steps: carrying out the binarization processing of a preprocessed image; dividing the oral liquid into an upper region and a lower region, and setting threshold values for the imaging areas S, perimeters and minimum bounding matrix length-width ratios of the upper and lower regions; and judging whether the upper and lower regions have the visible foreign matters or not according to the relation of the parameters and threshold values. The method is high in precision, is good in stability, and solves a problem of recognition errors caused by the recognition of the foreign matters based on a single parameter. The distinguishing detection can achieve the effective detection of plant fibers, residuals and hairs, and also can achieve the accurate detection of the small foreign matters with a certain mass in irregular motion, and can effectively eliminate the interference caused by the bubbles. The method provided by the invention is low in equipment cost, is simple and efficient in processing algorithm, can detect various types of foreign matters, and can meet the requirements of the online production.

The invention discloses an optical cable fence system, and belongs to the technical field of monitoring. The optical cable fence system comprises a sensing optical cable and a fence, wherein the sensing optical cable is positioned on a frame at the top of the fence and is in straight line parallel to the trend of the fence; and the outside of the sensing optical cable is wrapped by a tubular structure enabling the optical cable to deform under the oppression of external force and to restore after the external force is released. The optical cable fence system is suitable for universal mounting of all fences, enhances an optical detection signal, improves the signal-to-noise ratio, lowers system installation and maintenance costs, and significantly improves structural invisibility.

An optical fiber ring interferometer is provided, which is based on a common light path for two or more light beam pairs preferably originated from two or more light sources of a substantially different spectrum or from a single light source split spectrum and whereas each light beam of a specific pair is propagating in relative opposite directions, wherein at least one pair of light beams is utilized to detect acousto-mechanical events and to provide information regarding location and other characteristics of detected environmental disturbance.

The invention discloses a phased array weather radar and a self-adaptive frequency selection method and system thereof. When a prior signal-to-noise ratio is greater than or equal to a set threshold value, it is indicated that an airspace interference signal is strong, and the interference signal is avoided by adjusting an azimuth angle and/or a pitch angle; if interference signals can be avoided by adjusting the azimuth angle and/or the pitch angle, that is, the prior signal-to-noise ratio under a certain azimuth angle and pitch angle is smaller than a set threshold value, the working frequency is recorded and stored; if the interference signal cannot be avoided by adjusting the azimuth angle and/or the pitch angle, that is, the prior signal-to-noise ratio under any azimuth angle and pitch angle is greater than or equal to a set threshold value, the working frequency is not recorded and stored; and all working frequencies capable of avoiding interference signals by adjusting azimuth angles and/or pitch angles are obtained, frequency selection is carried out in the working frequencies, and the interference signals can be effectively avoided by combining the corresponding azimuth angles and pitch angles. The method does not need manual participation, does not need to add a hardware structure, and is simple in processing algorithm.