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1838results about How to "Reduce time consumption" patented technology

Early warning method against vehicle collision based on electronic map

The invention relates to an early warning method against vehicle collision based on an electronic map. The method comprises that 1) GPS data, which comprises movement station information and position information, of a vehicle is obtained, and the position information of the vehicle is converted by a coordinate system and mapped into a two-dimensional rectangular coordinate system; 2) according to historical GPS data of the vehicle, the present position information of the vehicle is optimized in a Kalman filtering algorithm to predict a first present position of the vehicle; 3) according to the historical GPS data of the vehicle, information of the electronic map is combined to predict a second present position of the vehicle; 4) the first present position and the second present position of the vehicle are combined to predict the optimal position of the vehicle; and 5) the predicted optimal position of the vehicle is combined with a TCC algorithm to make early warning against collision. Compared with the prior art, whether the vehicle possibly collides with vehicles in the surrounding is predicted in real time, early warning is given to a driver in real time, the driving safety and the vehicle positioning precision are effectively improved, and the method is practical and efficient.
Owner:TONGJI UNIV

Bounding box and space partitioning-based virtual object collision detection method

The invention provides a bounding box and space partitioning-based virtual object collision detection method. The method includes the following steps that: virtual object collision pre-detection is performed on two irregular virtual objects; region segmentation is performed on a region to be detected; intersection testing is performed in the sub regions segmented from the region to be detected; virtual object collision detection is performed by using a point vector set representing a moving virtual object and a triangular surface representing a virtual object which does not require assembly at present; and if the virtual objects intersect with each other, the virtual objects collide with each other, otherwise, the virtual objects do not collide with each other. According to the bounding box and space partitioning-based virtual object collision detection method of the invention, a collision detection range of a space is narrowed through using the spatial correlation of the virtual objects, so that time consumption can be reduced, and at the same time, the detection efficiency of the method and the geometric accuracy of collision detection are greatly improved; a bounding box is reduced into the triangular surface and the points, so that the misjudgment of the collision detection can be decreased; and a collision detection process is refined to the interference between the triangular surface and the points, and separate detection is carried out, and therefore, detection efficiency can be greatly improved.
Owner:NORTHEASTERN UNIV

Construction optimizing and operating method of automatic fixed-point picking-up system of logistics express

The invention discloses a construction optimizing and operating method of an automatic fixed-point picking-up system of a logistics express. A system optimizing scheme containing a picking-up machine layout, a customer demand point attribution division and an express delivery line is generated according to the geographical position, demand amount and relevant logistics cost of a demand point of city express customers. When the system operates, a delivery center classifies expresses according to an automatic picking-up machine service range of the delivery center and the expresses are delivered by delivery workers according to an optimized delivery line scheme; and meanwhile, picking-up information is sent to the customers. After the customers pick up the expresses, the information is fed back to the delivery center by a picking-up machine so as to finish the whole express delivery task; otherwise, the customers are manually called to pick up the expresses; and if the customers cannot be contacted, the expresses are sent back to sending places to finish the delivery task. By virtue of the operation of the system, the abutting problem of time and space of the delivery workers and picking-up persons can be effectively solved in the express delivery process, so that the express delivery cost is reduced, the whole efficiency is improved, and the low carbonization and greening of the logistics express are realized.
Owner:SOUTHEAST UNIV

Starting and shutdown control method for proton exchange membrane fuel cell

The invention provides a starting and shutdown control method for a proton exchange membrane fuel cell. According to the method, a whole fuel cell stack is divided into a plurality of cell modules; each cell module is connected with a modularized discharging circuit which is composed of a control switch, an auxiliary load and a crystal diode in mutual series connection; each modularized discharging circuit and a main load circuit are in series connection and are respectively connected with the cathode end and the anode end of the fuel cell; an air source is connected with the anode end of the fuel cell through an air blow-down valve; and air is used to purge residual hydrogen at the anode. During starting control, hydrogen is used to purge the anode, and the auxiliary load is used to control the voltage of the cell; and during shutdown control, introduction of air and introduction of hydrogen are successively stopped, a closed system of the auxiliary load is used for discharging, and introduction of air is cooperatively used for purging of the anode. The invention has the following advantages: consumption of time during shutdown of the fuel cell is reduced; the concentration of residual oxygen at the cathode is lowered down; reversal of poles of a single cell in the modules is prevented, and the phenomenon of reversal of poles of the fuel cell in the processes of shutdown discharging and air purging is prevented; and the system of the fuel cell is more simplified and is convenient to operate.
Owner:WUHAN UNIV OF TECH

Exception detection method and application, and monitoring equipment

The invention discloses an exception detection method, which is executed in monitoring equipment and is suitable for carry out real-time exception detection on one or a plurality of periodic performance indexes of monitored equipment. The method comprises the following steps: obtaining the first time sequence of a certain periodic performance index of the monitored equipment, wherein the first time sequence comprises a plurality of observation values of the periodic performance index in a time period [t0, tnow]; setting each periodic data size n0; according to the each periodic data size n0 and the first time sequence, determining a second time sequence X, wherein the second time sequence comprises a plurality of observation values of the periodic performance index in a time period [tnow-[Delta]*n0+1, tnow]; carrying out STL (Seasonal and Trend decomposition using Loess) on X, and splitting X into a periodic sequence S, a tendency sequence T and a residual sequence R; according to X and R, determining an array D to be detected; and adopting an improved ESD (Extreme Studentized Deviate) algorithm to determine exceptional points in D, and the separate score of each exceptional point. The invention also discloses an exception detection application which can implement the above method, and the monitoring equipment which comprises the above application.
Owner:北京睿象科技有限公司

Cockpit instrument automatic recognizing and detecting method and device

The invention discloses a cockpit instrument automatic recognizing and detecting method, which comprises the following steps that instrument images are read; the images are sampled; nonlinear vector median filters are adopted for carrying out noise reduction processing on the images; overall and local threshold value methods are combined, instrument images are subjected to binaryzation, and binaryzation images are obtained; the images are refined, pointers are accurately detected, and the pointers subjected to refining processing become single pixel width pointers. The cockpit instrument automatic recognizing and detecting method has the advantages that an improved crossed visual model is utilized, and instrument edges are extracted; according to priori knowledge, the study training is carried out, similar features are found, and instruments are subjected to classified comparison; a gradient method is utilized, and the angle of the pointers is calculated; through the angle, the numerical value is calculated by combing the priori knowledge, and in addition, the storage display is carried out. Cockpit instruments are completely and automatically recognized and detected, the manual intervention is not needed, manpower resources can be greatly reduced, errors caused by subjective factors are avoided, and the cockpit instrument automatic recognizing and detecting method with good performance is provided.
Owner:AIR FORCE UNIV PLA

Polyurethane-coated spandex fabric-fused midsole and apparatus and method for manufacturing the same

ActiveUS20120056345A1Easily and conveniently manufacturedReduce laborTailstocks/centresConfectioneryEngineeringMechanical engineering
The present invention relates to a polyurethane-coated (PU-coated) spandex fabric-fused midsole, and an apparatus and method for manufacturing the same, which allow a shoe midsole to be easily and conveniently manufactured through a single automatic process, and allows a PU-coated spandex fabric to be easily fused to a surface of the midsole in the process of manufacturing the midsole. For this purpose, there is provided a polyurethane-coated (PU-coated) spandex fabric-fused midsole manufacturing apparatus including: a central axis rotated by a driving force of a motor; a rotary disc fitted on the central axis to be rotated together with the central axis; a plurality of midsole forming mold units, which are mounted on the outer ends of support members radially extending from the outer circumference of the rotary disc, respectively; a PU-coated spandex fabric supply apparatus installed above the trace of rotation of the midsole forming mold units to provide a PU-coated spandex fabric to each of the midsole forming mold units; vacuum means installed between the rotary disc and the midsole forming mold units to vacuum the inside of a midsole forming mold unit supplied with a PU-coated spandex fabric to such an extent that the PU-coated spandex fabric comes into close contact with the inner surface of the midsole forming mold unit; a resin introducing apparatus installed outside of the trace of rotation of the midsole forming mold units to introduce polyurethane (PU) resin into the midsole forming mold unit having the PU-coated spandex fabric film in contact with inner surface thereof; and a foam-molded product removal apparatus installed outside of the trace of rotation of the midsole forming mold units to remove a foam-molded product formed by foaming the polyurethane resin introduced into the midsole forming unit by leaving the polyurethane resin in the midsole forming mold unit at a predetermined temperature for a predetermined length of time.
Owner:LEE DONG GUN

City parking position prescribing induction system based on wireless sensing network

The invention relates to an urban parking space reservation and guidance system based on a wireless sensing network. An architecture used by the system comprises an information acquisition system, a data processing center, a guidance system and an information issuing system, wherein sensor nodes of the information acquisition system form the wireless sensing network to acquire parking space information and transmit parking space data to the data processing center through Internet; the data processing center receives and processes user requests and feeds back the parking space information to users through the parking space information issuing system; the guidance system provides route information and leads the users to specified parking spaces; and the information issuing system issues the urban parking space information on multiple terminals for the users to browse and select. By adoption of the architecture, any user can submit a parking space search request to the data processing center through the Internet, a public telephone network, a cellular mobile network and so on at any time and places, reserve satisfactory parking space, and quickly and conveniently obtain a garage and a parking space when led by the guidance system. The parking space reservation and precise guidance system utilizes the instantaneity and the convenience of network and science and technology to solve the problem that parking spaces are difficult to obtain.
Owner:JIAXING WIRELESS SENSOR NETWORKS CENT CAS

Rapid distance-measuring method for pedestrian on road ahead on the basis of on-board binocular camera

The invention provides a rapid distance-measuring method for pedestrian on a road ahead on the basis of an on-board binocular camera and discloses a binocular detecting and distance-measuring method for a pedestrian applicable to an automatic driving system. The method comprises the steps: training a pedestrian detecting model by means of a pedestrian detecting method based on study, and detecting pedestrians in a binocular scene by means of the pedestrian detecting model; calculating a matching point of a point, chosen from the detection result of a left image, in a right image according to a color characteristic and a scale-invariant characteristic, and calculating a parallax value between matching pairs; obtaining an accurate parallax value of the detection result by means of a parallax mid-value searching method, and calculating a distance between the pedestrian and the camera according to a geometrical relationship between a camera coordinate system and an image coordinate system. With respect to the problems of slow calculation speed and inaccurate distance measurement in the present pedestrian detecting and distance-measuring method for a pedestrian based on the binocular camera, the method accelerates the detection speed by means of a road column-like model; and the distance-measuring accuracy of pedestrians in a road scene is improved by means of the matching of many characteristic points.
Owner:HUAZHONG UNIV OF SCI & TECH
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