492results about How to "Reduce the chance of collision" patented technology

A wireless communication network and a method for adaptively selecting a route for communications are disclosed. The wireless communication network includes a central node and a plurality of sub-nodes, of which the sub-nodes include relay nodes and terminal nodes, the central node has a function of routing control for communications in the whole wireless communication network, the relay node has a forwarding function, and the terminal node has a transceiving function. The method includes: generating a global routing table of the wireless communication network based on a predetermined criterion, by the central node independently or in cooperation with a part of the relay nodes; generating a local routing table of each of the sub-nodes based on the global routing table, and informing the local routing tables to the respective sub-nodes to store the local routing tables in the respective sub-nodes, by the central node independently or in cooperation with a part of the relay nodes, the local routing table including paths from the corresponding sub-node to adjacent nodes, wherein the local routing tables of at least a part of the sub-nodes each include a plurality of paths; and adaptively selecting, by the sub-node, a path from the local routing table thereof for communications according to a predetermined rule. According to this invention, chance of collision in communications is reduced, and energy saving is realized.

The invention discloses a running instant anti-collision warning system and a running instant anti-collision warning method. The running instant anti-collision warning method comprises the following steps of: continuously sending running information packets of a vehicle outwards by using a wireless communication module of the vehicle and receiving the running information packets broadcasted by other vehicles; determining whether the surrounding vehicles are in an early warning range of the vehicle according to the information of the running information packets; if the surrounding vehicles arein the early warning range of the vehicle, performing coordinate system conversion between the vehicle and other vehicles and carrying out the steps of classifying collision areas to obtain the coordinate positions of collision points, judging whether the collision points exist or not, calculating collision time and the like, wherein the estimation operation of the collision points is not limitedby the positions of the adjacent vehicles. The running instant anti-collision warning system and the running instant anti-collision warning method can judge the potential hazards from all directions and effectively improve the safety by the anti-collision early warning.

A communication terminal apparatus that exhibits a shorter time period required until a start of communication and causes the throughput in the wireless communication system to be less reduced. In this apparatus, when the number, N, of retransmissions notified by a response determining part (107) is zero, a subchannel-to-be-used selecting part (108) selects a subchannel, among others, which exhibits the highest order one of the reception qualities of the subchannels notified by a reception quality determining part (106), and then notifies the selected subchannel to a subchannel allocating part (113). When the notified number, N, of retransmissions is one or more, the response determining part (107) selects a subchannel which exhibits the N-th lower order reception quality than the highest order reception quality, based on the reception qualities of the subchannels notified by the reception quality determining part (106) for a pilot signal received after a transmission of the latest access request signal, and then notifies the selected subchannel to the subchannel allocating part (113).

The invention discloses an indoor positioning method based on UWB technology, and belongs to the field of high-precision indoor positioning. The method comprises the steps that a first UWB base station sends time synchronization information to a second UWB base station, a third UWB base station and a to-be-positioned label to realize the time synchronization of the equipment; the to-be-positioned label sends own equipment information to the first UWB base station, the second UWB base station and the third UWB base station according to a time slot ALOHA algorithm; the first UWB base station, the second UWB base station and the third UWB base station receive the own equipment information sent by the to-be-positioned label and upload the information to an upper computer; and the upper computer calculates the acquired information to position the to-be-positioned label. Compared with the prior art, the indoor positioning method disclosed by the invention has the advantages of low cost, small signal collision probability, no influence on data reception, high positioning accuracy and capability of expanding the label capacity.

The invention relates to a quality improving method for horizontal continuous casting blanks by applying complex field and the device, belonging to the technical field of preparation of metal material, in particular to the technology of applying complex electromagnetic field and ultrasonic field in the continuous casting process of metal casting blanks. The device is characterized in that a generator of inert gas is arranged at the center of the bottom of a holding furnace; a generator of traveling wave magnetic field is arranged on the side of the holding furnace; a power ultrasonic device is arranged on the holding furnace close to the water port; a restriction electromagnetic coil is arranged on the outer side of a crystallizer. The device has the advantages that: firstly, the production technology is simple, the operation is easy, and the efficiency is high; secondly; the disadvantages of easy broken in rolling and drawing process of casting blank due to more impurity and pores is solved; thirdly, the solidification structure of the casting blanks is uniform, the crystal grain is fine, and the casting blanks can be rolled directly at casting state. The quality improving method and the device are mainly used for the field of metal continuous casting.

The invention discloses a sequential grabbing method and device for stacked articles, and relates to the technical field of computers. One specific embodiment of the method comprises the following steps: segmenting point cloud of an article on the uppermost layer from point cloud data of stacked articles, and acquiring three-dimensional coordinates of the segmented point cloud; for the segmented point cloud, mapping three-dimensional coordinates of the segmented point cloud into two-dimensional coordinates on a two-dimensional image of the object by utilizing a calibration relationship betweena two-dimensional camera and a three-dimensional camera; digging out a corresponding area from the two-dimensional image of the article according to the two-dimensional coordinates, and identifying the article in the area; and acquiring three-dimensional coordinates of the corresponding point cloud according to the identified two-dimensional coordinates of the article, and calculating the identified central position of the article and the grabbing posture of the tooling according to the acquired three-dimensional coordinates of the point cloud so as to grab the article. According to the method, article identification and article position determination can be accurately carried out, so that article grabbing is more accurate, convenient and efficient, and the collision probability during article grabbing is reduced.

The invention discloses an access level control method, wherein a base station adds a parameter relative to access probe initial power adjustment in an access parameter message; a terminal selects corresponding access probe initial power adjustment parameter in the access parameter message according to own level and service type needing to be initiated, calculates transmitting power of the accessprobe, and transmits the access probe according to the calculated transmitting power. The invention further correspondingly discloses an access level control system. The invention can transmit the access probe for the user with high priority and the service with high demand on time delay through higher power so that the access speeds of the user with high priority and the service with high demandon time delay are improved and the collision probabilities of the user with low priority and the service with low demand on time delay are reduced; therefore, the invention can improve the terminal access success ratio and improve the access speed.

The invention provides an olefin polymerization catalyst carrier, a preparation method thereof, and an application of the olefin polymerization catalyst carrier in the preparation of olefin polymerization catalysts. The olefin polymerization catalyst carrier contains magnesium halide with the general formula of MgXY, a compound with the general formula of R1OH, a compound with the general formula of R4OH and an oxirane compound, wherein X is halogen, Y is halogen, a C1-C14 alkyl group, a C1-C14 alkyloxy group, a C6-C14 aryl group or a C6-C14 aryloxy group, R1 is a C1-C8 alkyl group or a C3-C8 cycloalkyl group, R2 and R3 respectively independently represent H, and C1-C5 alkyl or halogenated alkyl groups, R4 is a C16-C24 alkyl or aralkyl group. The carrier has the advantages of good particle form, smooth and special-shaped particles-free surface, and increase of the bulk density of a polymerized product.

The invention discloses a vehicle-road-person-coordinated intelligent early warning system and method for expressway traffic safety. The system is composed of a piece of reflective clothing with an LTE-V straight-through module and a positioning system, roadside LTE-V communication equipment, and a roadside video monitoring system, vehicle-mounted LTE-V communication equipment, a vehicle-mounted millimeter-wave radar, a vehicle motion state sensing module, and a vehicle-mounted safety early-warning module. According to the invention, the protection measures and equipment are provided for driving safety on an expressway; long-distance early warning and close-distance driving behavior intervention can be carried out on a detected dangerous source; and the collision probability among the driving vehicles, operators, and persons with illegal behaviors on the expressway is reduced.

The invention discloses a BIM technology-based temporary water and temporary electricity management method and system. The method includes: performing temporary water and temporary electricity pre-planning based on BIM, so as to obtain a three-dimensional model of a temporary water and temporary electricity integrated system; performing collision check of a first time and three-dimensional drawing proofreading, so as to obtain a temporary water and temporary electricity three-dimensional design drawing; performing collision check of the second time and interface conversion on the temporary water and temporary electricity three-dimensional design drawing according to construction site environmental information and practical measurement data, and converting the temporary water and temporary electricity three-dimensional design drawing to a temporary water and temporary electricity two-dimensional construction blueprint; performing three-dimensional simulation construction simulation on the BIM corresponding to the temporary water and temporary electricity two-dimensional construction blueprint, so as to obtain a final BIM construction model; and performing construction according to the temporary water and temporary electricity two-dimensional construction blueprint and the final BIM construction model, thereby adopting a method of combined hanging of groove frames to lay temporary water and temporary electricity facilities. The BIM technology-based temporary water and temporary electricity management method provided by the invention has the advantages of being neat, being relatively high in installation efficiency, being stable and being low in cost, and can be widely applied to the field of computer application.

The invention provides a D2D (Device to Device) resource allocation method and a base station. The D2D resource allocation method comprises the steps that the base station receives location information of a D2D terminal and D2D resource allocation information of the D2D terminal which are sent by an adjacent base station of the base station; the base station allocates D2D resources for a D2D terminal in a coverage area of the base station according to the location information of the D2D terminal and the resource allocation information of the D2D terminal which are sent by the adjacent base station and location information of the D2D terminal and D2D resource allocation information of the D2D terminal in the coverage area of the base station. By adopting the method provided by the invention, the base station can allocate the D2D resources more reasonably, the probability of resource collision occurred in allocated D2D resources is reduced, and switching of the D2D resources is reduced, so that allocation of the D2D resources is carried out reasonably and efficiently.

The invention relates to reinforcing filler used for a rubber latex product, a preparation method thereof and application thereof. The reinforcing filler consists of the following components in part by weight: 50 to 80 parts of base material, 0.01 to 0.4 part of dispersant, 0.001 to 0.5 part of surface treating agent, 0.01 to 1 part of emulsion and 20 to 50 parts of water, wherein the base material is any one of heavy calcium carbonate powder, kaolin powder and argil powder; the dispersant is any one of casein, methylene dinaphthalene sodium sulfonate, sodium polyacrylate, potassium hydroxide and ammonia water; the surface treating agent is any one of bentonite, cellulose, swelling soil and attapulgite; and the emulsion is any one of mineral oil, vaseline, liquid paraffin and polyoxychloroethylene wax. The reinforcing filler has economic formulation and good reinforcing effect. The preparation method is a conventional stirring and grinding method. The process is simple, and little equipment is used. The application comprises the following steps: adding the reinforcing filler into rubber latex, blending the mixture evenly, forming a layer of film on a die by adopting a soaking and casting method, and then drying the film for 15 to 30 minutes at a temperature of between 110 and 130 DEG C to obtain the reinforced filled rubber latex product. The reinforcing filler is favorable for improving the tensile strength of the rubber latex product and reducing the usage amount of the latex.

The invention provides an AGV charging management method. The method includes the following steps that a charging threshold value a, a target electric quantity value b and a lowest electric quantity threshold value c are set; a total real-time electric quantity value e of AGVs in a transport system is monitored; an expected number g of to-be-charged AGVs in the transport system is calculated; theg AGVs are selected as the to-be-charged AGVs, whether the AGVs marked with execution of charging tasks exist in the expected number g of the to-be-charged AGVs or not is judged, according to the charging threshold value a and the lowest electric quantity threshold value c, the precedence levels of the to-be-charged AGVs are judged, and the to-be-charged AGVs are sequentially moved to operating charging piles to be charged according to the precedence levels; and an operation in a new round is started after one to-be-charged AGV is charged. The provided transport system applies the above AGV charging management method. By the adoption of the AGV charging management method, the charging precedence levels of the AGVs can be arranged quickly; and the transport system can assess the total electric quantity of the AGVs in the transport system and then execute charging management, so that AGV charging management decision making time is shortened.

The invention provides an instrument holding mechanical arm used for a minimally-invasive robot, and relates to the instrument holding mechanical arm. The instrument holding mechanical arm solves the problems that the number of passive joints is large when an existing mechanical arm is arranged in a concentrated mode and the existing mechanical arm is large in overall size and low in rigidity when a passive arm is too long. The instrument holding mechanical arm comprises vertical horizontally-moving safety brake devices, passive joints, first joints, second joints and an integrated operative instrument drive device. One ends of the passive joints are arranged on the upper portions of the vertical horizontally-moving safety brake devices in a rotatable mode. One ends of the first joints are connected to the passive joints in a rotatable mode. One ends of the second joints are connected with the other ends of the first joints in a rotatable mode. The integrated operative instrument drive devices are arranged at the other ends of the second points. The instrument holding mechanical arm is used for operative instrument drive of the micro operative instruments of the robot.

The invention belongs to the field of high performance flexible transparent conductive film, and more specifically discloses a controllable preparation method of a single or small tube bundle size single-walled carbon nanotube transparent conductive film. According to the controllable preparation method, floating catalyst chemical vapor deposition method is adopted, carrier gas flow amount is increased, and catalyst concentration is reduced, so that the concentration of single-walled carbon nanotube formed in a reaction zone is reduced, the collision frequency of carbon nanotubes is reduced, the Van der Waals force among tubes is reduced, aggregation into large tube bundles is avoided, and the high quality single-walled carbon nanotubes distributed in single tubes or small ruber bundles are obtained; dry method collecting and transferring technology is adopted, so that the high performance single-walled carbon nanotube transparent conductive film is obtained. The carbon nanotube film of single tubes or small tube bundles is prepared, the contact resistance among the tubes is reduced, formation of large tube bundles is inhibited, adsorption on light is inhibited, the high quality high performance transparent conductive film is obtained, and applications of the high performance flexible transparent conductive film in the field of high performance photovoltaic devices are promoted.

The long distance radio monitoring system features in at least one knot system and ZigBee data receiving terminal, radio data sending terminal, radio data receiving terminal, management server, the said knot system being monitoring probe connecting to the ZigBee data collection terminal through the data cable, the ZigBee data receiving terminal connecting to the radio data sending terminal through the RS232 which connects the radio data receiving terminal and the management server. The said monitoring probe has radio monitoring probe of the frequency transceiver. There is relay station between the knot system and the ZigBee data receiving terminal. There are display and bummer alarm at the receiving terminal of the ZigBee. The radio data sending terminal used ISM free frequency intelligent radio data terminal. The radio data sending terminal used ISM free frequency intelligent radio data terminal. It has little interference, low in energy consumption, safe and reliable.

The invention discloses a three-dimensional integrated circuit on-chip network routing method. According to the method, a three-dimensional steering model is adopted for routing guidance, a port selection mechanism is adopted for selection of a legal output port, and a data packet is routed in a unidirectional manner from a source node to a destination mode. The three-dimensional steering model is a parity-based steering model, an X-Y plane or an X-Z plane or a Y-Z plane of a three-dimensional scene is used as the datum plane, a routing path between the source node and the destination mode is mapped to the datum plane, and steering limiting is performed on the datum plane by adoption of an inter-layer illegal steering principle of a device layer and a corresponding supplementary principle. The invention further discloses a three-dimensional integrated circuit on-chip network routing system.

The invention discloses a UAV rising-landing method and device and a computer storage medium. The UAV rising and landing method used for landing and rising of UAVs arranged in a queue comprises that when landing-rising instructions of the multiple UAVs are received, position information of each UAV is obtained; formation of the UAVs is realized by grouping according to the position information, and UAV groups are obtained; and the UAV groups are ordered, the UAV groups are controlled to land/rise according to the ordering sequence, the UAVs in the same group are controlled to land/rise simultaneously, and each UAV lands/rises to a corresponding position. Thus, the UAVs arranged in the queue are prevented from collision in the landing/rising stage.

The invention provides a vehicle trajectory prediction method, a control device and an unmanned vehicle, and relates to the technical field of unmanned driving or automatic driving. The vehicle trajectory prediction method comprises the following steps: acquiring information of a road section where a target vehicle is located and driving information of the target vehicle; judging a driving trend of the target vehicle according to the road section information and the driving information, and obtaining a predicted driving track of the target vehicle according to the driving trend. According to the vehicle trajectory prediction method, the driving information of the target vehicle can be judged according to different road section information, different driving trends expressed when the targetvehicle expresses the same driving information on different road sections are effectively distinguished, the predicted driving trajectory of the target vehicle is correspondingly obtained, and the prediction accuracy of the driving trajectory of the target vehicle is higher; the current vehicle can correspondingly plan the own driving route according to the predicted driving track, so the drivingsafety is higher.

The invention discloses an unmanned aerial vehicle navigation control system and method based on big data analysis. The system comprises a flight route pre-planning module, a GPS positioning module, an end point input module, a wind direction detection module, an obstacle flight direction detection module, an obstacle flight speed detection module, an image acquisition module, an image analysis processing module, an obstacle detection module, an obstacle type judgment module, a route safety judgment module and a flight track control module. The system has the advantages that the flight route is preset according to the starting point position and the terminal point position of the unmanned aerial vehicle, in the flight process of the unmanned aerial vehicle, obstacles in a certain range in front are detected, the types of the obstacles are determined according to the moving direction and the moving speed of the obstacles, and different processing modes are selected according to the types of the obstacles; thus, the flight route of the unmanned aerial vehicle is adjusted, the flight efficiency of the unmanned aerial vehicle is improved, the flight safety of the unmanned aerial vehicle in the flight process is guaranteed, and the collision probability is reduced.

The invention discloses a method of implementing wireless sensor network query and a method of transmitting data back, wherein the method of network query includes the following steps: a node in the sensor network receives the query request set by the user, the query request at least includes a query area and a query task; the nodes in the query area form a cluster structure, the cluster head of the cluster structure inosculates the sensitive data which are collected by the cluster members and correspond to the query task; the inosculated sensitive data are returned to the user. The expenditure of the control signals in the total network range can be reduced by adopting the method.

The invention relates to a laser range finder with a protective effect, which comprises a main body and two telescopes, and is characterized by further comprising a cleaning mechanism and a protectivemechanism, wherein the cleaning mechanism includes a driving assembly, a moving frame, a first driving rod, a protective cover, two guide rails and two cleaning assemblies, the protective mechanism includes an air bag, an air cylinder, a piston, a first spring, a connecting wire and a power assembly, and the power assembly includes a driving unit, a gear, a winch, a rotating plate, a third driving rod, a guide rod, a second spring, a lifting sleeve and an electromagnet. In the laser range finder with a protective effect, cleaning blocks are driven by the cleaning mechanism to clean the telescopes respectively, thereby reducing the attenuation of laser in the transmitting and receiving process, and thus improving the accuracy of the laser range finder. The air inside the air cylinder is charged into the air bag through the protective mechanism, thereby reducing the probability that the laser range finder is broken under a cushioning effect of the air bag.

The invention discloses combined type gas atomization powder preparation equipment, and relates to the technical field of metal powder material preparation. The combined type gas atomization powder preparation equipment comprises a feeding system, a smelting system, an atomizing system, a circulating gas system and an ultrasonic generator which are connected in sequence. The smelting system comprises a smelting chamber and a heating coil, and the heating coil is arranged on the outer side of the free end of a metal material rod in a sleeved manner; the atomizing system comprises an atomizing chamber and an atomizing spray disc; the circulating gas system comprises a plurality of blowing mechanisms which are arranged in a sleeved mode; the blowing mechanisms comprises an annular pipe and anair blowing opening, wherein the air blowing opening is arranged on the annular pipe at intervals, and the air blowing opening is inclined downwards and points to the center line of the annular pipe.the blowing mechanisms are additionally arranged on the top wall of the atomizing chamber through the combined type gas atomization powder preparation equipment, the ultrasonic generator is arrangedon the inner wall of the atomizing chamber, and ultrasonic waves emitted by the ultrasonic generator can be used for dispersing and crushing molten metal droplets into finer powder. The composite gasatomization powder preparation equipment can reduce the occurrence of a satellite ball, and can improve the yield of fine powder and reduce the oxygen content of powder.