558results about How to "Meet operational requirements" patented technology

The invention relates to the field of a robot, in particular to an industrial robot control system based on visual positioning and a control method thereof. The control system provided by the invention is convenient to operate and has the advantages of simple structure and high efficiency and accuracy. In artificial teaching process, positioning motion control process and oriented motion control process of the control method provided by the invention, the positioning of luminescence mark points or the ends of an operating tool is performed in the coordinates ow, xw, yw and zy of a visual measuring device, thus the control system has no requirement on the motion control accuracy of the robot and the relative position relation of the coordinates of the tool and the coordinates of the robot, and the control method only requires linear motion realized by the rotation of axes from the first axis to the third axis and rotary motion realized by the rotation of axes of axes from the fourth axis to the sixth axis according to the theoretical model of the robot and, thereby fundamentally avoiding the extremely strict requirements on the accuracy of a robot model and the calibrating accuracy of the coordinates of the tool in conventional off-line programming teaching and meeting the operating requirements of a complicated track with high accuracy.

The invention provides a CTCS (China Train Control System)-2 train operation control system comprising ground facilities and a vehicle-mounted apparatus, wherein the ground facilities include a temporary speed limit server, a train control centre, a railway circuit, a ground electric unit and a transponder group; the temporary speed limit server generates a temporary speed limit command; the train control centre generates carrier frequency and low frequency coded messages and active messages according to rail zone state messages and the temporary speed limiting command; the rail circuit generates a modulation signal according to the coded message, sends the modulation signal, generates and sends a rail zone state message; the ground electric unit sends the active transponder messages to a transponder group; the transponder group sends a fixed transponder message and an active transponder message; and the vehicle-mounted apparatus includes a vehicle-mounted safety computer, a railway circuit message receiving module and a transponder message receiving module. The CTCS-2 train operation control system provided by the invention realizes automatic control of train operation based on train operation permission messages transmitted by the rail circuit and the transponder group.

The present invention relates to a method for achieve automatic driving curve generation between stations during operation by an automatic train driving system. The method comprises that: the system real timely acquires operation information of an automatic train monitoring system, train parameter information and track information of a track database; the driving curve information at each operation stage between the stations is real timely and adaptively calculated; the key point information at each operation stage between the stations is extracted and recorded according to the driving curve information; the best automatic driving curve of the train between the stations during the operation is real timely generated. With adopting the method for achieve the automatic driving curve generation between the stations during the operation by the automatic train driving system, a plurality of disadvantages of the train in the automatic driving process are effectively overcome; the advantages of higher comfort, good energy saving effect, high parking precision, easy adjustment, stable and reliable work performance, and wide application range are provided; the purposes of punctual operation, energy saving operation, high comfort operation, safe and smooth operation of the train are achieved, and the operation requirements of the CBTC system are completely met.

The invention relates to a realization method based on the CPCI bus technology of the dual module hot spare system switching. The realization method is characterized by comprising the following steps: 1) the cabs at the head and tail of a train are separately provided with an ATP and two ATOs, the ATP adopts 2-out-of-3 architecture, the same ATOs (ATO1, ATO2) are hot spares to each other; 2) when the train runs normally, only the ATPs and ATO of the front head cab in the advancing direction work, the tail cab is powered off; when the train enters a turning section, a driver in the head cab of the original advancing direction presses an AR button on the driving platform to power on the ATPs and ATO of the tail cab; the ATPs and ATO of the head cab and the ATPs and ATO of the tail cab exchange information, the driving privilege is exchanged according to the driving direction so that the original tail cab is reversed to become the head cab, the ATPs and ATO of the original head cab are powered off; and 3) the redundancy automatic switching of one ATO adopts the dual module hot spare mode. The system of the invention has simple hardware configuration, lower system cost and abundant interfaces and is convenient to test and debug.

The invention discloses a Beidou / GPS combination based safe train locating method and system. A Beidou satellite navigation system is combined with a GPS satellite navigation system, a ground differential station system, a train-mounted speedometer and a ground responder system are combined in use, and safe location of a train is realized. The system of the invention can coexist and be compatiblewith existing train locating systems, and satellite navigation is safer in the aspect of train locatin.

The invention discloses an integrated type six degrees of freedom precision positioning platform. The integrated type six degrees of freedom precision positioning platform comprises a base, a lower platform component, a middle platform component and an upper platform component. The integrated type six degrees of freedom precision positioning platform utilizes a piezoelectric ceramics brake to enable the lower platform component to achieve rectilinear motion along an X direction and a Y direction of a coordinate system, enable the middle platform component to achieve a rectilinear motion along an Z direction of the coordinate system and a rotary oscillation around an axis which is parallel to the X axis and an axis which is parallel to the Y axis, and enables the upper platform component to rotate around the Z axis. The integrated type six degrees of freedom precision positioning platform can achieve precise control position on the six degrees of freedom and effectively avoids displacement coupling among axes due to the fact that the middle platform component and the lower platform component are designed into a symmetric structure. Meanwhile, the transmission platform can achieve integral manufacture, is driven by the piezoelectric ceramics brake, has the advantages of being free from friction and coupling, being high in precision, long in journey and high in resolution rate and can meet complex manufacturing and operation requirements of nanometer science and technology studies.

The invention provides an agricultural plant protection unmanned aerial vehicle (UAV) planting control system which is composed of a vehicle-borne subsystem and a ground station subsystem. The vehicle-borne subsystem comprises a vehicle-borne GPS antenna (1), a vehicle-borne relative height detector (2), a vehicle-borne obstacle detector (3), and a vehicle-borne data returning and receiving system (4). The ground station subsystem comprises a ground station geographic information system (5), a ground station flight task planning and flight control system (6), and a ground station instruction receiving and sending system (7). According to the system of the invention, work currently needing vehicle-borne flight control is transferred to the ground, the air control part is only responsible for stability augmentation and obstacle detection, and a lot of path computation and flight control operation are managed and controlled by the ground in a unified manner. Therefore, the weight of the vehicle-borne system is reduced greatly, the difficulty in UAV developing is reduced, and the operation requirements of a variety of UAVs are satisfied effectively.

An adjustment method for the dynamic stiffness of a rubber joint with liquid damping, and the rubber joint, and the rubber joint comprises metal outer sleeves, a rubber joint body, a throttling channel adjustment device and other parts, wherein the specific structure is as follows: proper holes are arranged on the outer surface of the rubber joint body and pressed-installed with the metal outer sleeves on the outer surfaces thereof to form closed cavities, the cavities are arranged in the relative movement directions of the mandrel and the outer sleeve of the rubber joint body, and symmetrically distributed at the both sides of the axis of the rubber joint body, and the two cavities are connected via a throttling channel; and in this way, when the mandrel and the outer sleeve of the rubber joint perform a relative movement, the volume of one side of each of the cavities at the both sides of the mandrel is reduced, and the volume of the other side is increased, so that a liquid damping medium at the side with the reduced volume flows to the side with the increased volume via pores, and the liquid damping medium generates a damping force while passing through the throttling channel due to damping action. The size of the throttling channel can be changed via the adjustment device, so as to achieve the purposes of adjusting the damping force and obtaining the needed dynamic stiffness.

The invention discloses a power grid multisource peak shaving method based on multistage dynamic programming. The method is to create a multistage dynamic programming model within one day when multiple power supplies are combined to operate in a peak shaving manner in a power system, and comprises the following steps: Step 1) obtaining an equivalent daily load curve according to the actual running situation of the power grid and the multiple power supplies running characteristics in the power grid; Step 2) calculating peak shaving cost per unit capacity for each of peak shaving units; Step 3) using the lowest running cost within one day of the system as an optimization objective, and creating a multistage dynamic programming objective function; Step 4) according to the actual running state of the power system, listing power grid running constraint conditions, and according to the running characteristics of each of generator sets, listing multi-power-supply constraint conditions; Step 5) applying an ant colony algorithm to solve the objective function in the Step 3), so as to obtain the optimal multisource peak shaving load distribution scheme. The power grid multisource peak shaving method meets the actual power grid running requirements and uses the ant colony algorithm to perform global search solving, so as to ensure the algorithm to be more practical.

The invention discloses a method for a robot to intelligently avoid human under a man-machine cooperation scene, comprising steps of constructing a robot column model of a simulation scene through robot D-H parameters, (2) obtaining RGB images of the real scene and skeleton data of an operator through Kinect, and constructing the column model of the simulation scene operator, 3) corresponding calibrations of the robot and the simulator in the real scene and the simulation scene , and 4) performing real-time detection collision of the robot model and the operator model. By using the method disclosed by the invention, the operator can freely move in the space where the robot operates, but the operator can avoid the obstacle according to the operator information obtained by the Kinect.

The invention discloses a double fluidized beds combustion-gasification material circulating system comprising a fluidized bed gasification furnace and a circulating fluidized bed combustion furnace; the middle portion of the fluidized bed gasification furnace is connected with a material charging chamber of a material returning chamber, and then is connected with the lower portion of the circulating fluidized bed combustion furnace through a material discharging chamber of the material returning device; the upper portion of the circulating fluidized bed is connected to a material charging chamber of a bi-directional material control device through a hyperthermia separator, then is divided into two paths, one path is connected with the lower portion of the fluidized bed gasification furnace through a hyperthermia conical valve on the side surface of the material charging chamber of the bi-directional material control chamber, and the other path is connected with the lower portion of the circulating fluidized bed combustion furnace through the material returning chamber of the bi-directional material control chamber. The circulating fluidized bed combustion furnace and the fluidized bed gasification furnace are combined tightly to implement gasification, combustion, classification and conversion of coal in one set of system, which leads to highly efficiency conversion of coal; the inventive system is also can be used broadly in combustion, gasification, catalysis and regeneration processes.

The invention discloses a high-accuracy arc extinguishing coil grounding system single-phase grounding wire selection method. The method comprises the steps of parallelly connecting a series loop which is composed of a grounding resistor and a circuit breaker with two ends of an arc extinguishing coil, wherein in normal operation, the circuit breaker is in an on state; additionally mounting a zero-sequence current transformer on each outlet wire of a transformer station without the zero-sequence current transformer; in single-phase grounding, acquiring the zero-sequence current of the zero-sequence current transformer by means of an existing microcomputer protecting device of a transformer substation, when flowing zero-sequence current is larger than a setting value Izd0, transmitting a fault signal after setting time T1, and determining a faulted line; and when the zero-sequence voltage of a bus voltage transformer increases to a certain value Uzd0, determining single-phase grounding, and performing tripping-out on the circuit breaker which is serially connected with the grounding resistor after a time period T2. The high-accuracy arc extinguishing coil grounding system single-phase grounding wire selection method has advantages of realizing simple reconstruction, greatly improving wire selection accuracy on the condition that safe and stable system operation is not affected, reducing economic loss caused by wire selection error and ensuring continuous electric power supplying to electric power users.

The invention relates to water treatment field, in particular to a process of advanced treatment and recycle of urban sewage, which adopts a membrane bioreactor and inverse penetration in combination. The invention takes secondary effluent of urban sewage treated by sewage plant or water of urban sewage being treated to meet the standard of secondary effluent as raw water; the raw water enters the membrane bioreactor MBR system for biochemical pretreatment to remove BOD, COD, SS, ammonia and nitrogen in the water to ensure that the water after treatment meets the quality requirement of reverse osmosis feed water; further water desalination is carried out through reverse osmosis system, and the needed recycle water can be obtained. By adopting MBR technology, removal rate of the main contamination COD can reach over 95 percent, the suspended matter and turbidity of the treated water are close to zero and the quality of the treated water is good and steady; according to process requirements, the water treated by the MBR system and the reverse osmosis system in sequence can be used as cooling water of cold rolled steel, after being blended according to certain proportion, thus realizing recycling of sewage.

The invention discloses a method for acquiring a direct current busbar voltage given value of an air conditioner system and a device for acquiring the direct current busbar voltage value of the air conditioner system. The acquiring method comprises the following steps: acquiring a motor parameter of a compressor, a running current and a running frequency of the compressor in the air conditioner system; calculating a weak magnetic critical voltage based on the motor parameter, the running current and the running frequency, and acquiring a standby voltage given value based on the weak magnetic critical voltage; detecting an input voltage of the compressor, and acquiring an input voltage peak value based on the input voltage; and limiting the amplitude of the standby voltage given value based on the input voltage peak value, a preset lowest busbar voltage given value and a preset highest busbar voltage given value, so as to acquire the direct current busbar voltage given value. The acquiring method allows the direct current busbar voltage given value to meet the running requirements of the compressor, the hardware voltage-resistance requirements, and the lowest working voltage requirements of a switch power supply inside the air conditioner system at the same time, and allows a PFC circuit to have only the voltage boosting function.

The invention discloses a shooting training system and method based on a smart phone and artificial intelligence. The system comprises a court positioning system, a basket detection system, a player identity recognition system, a player action analysis system, a basketball track recording system, a goal detection system and a visual playback system. During training, the court positioning system detects positions of a court boundary line, a center line, a penalty line, and side lines of a limiting area and a penalty area; the basket detection system performs basket position detection, and performs tracking and real-time detection based on target tracking; the player identity recognition system confirms the position and identity of the player; the player action analysis system acquires player body articulation point position information; the basketball track recording system records the ball position and the target size; the goal detection system judges whether a ball enters the basket or not; and the visual playback system stores and plays back the obtained information and the frames of the video. According to the basketball shooting training system, shooting training of basketballtrainees is facilitated, and the defects of an existing shooting training system are overcome.

The invention provides a flow data integrating and flow adjusting method, which is used for developing and planning the research and the attempt of checking data integration and flow adjustment based on the actual power network data. In the method, the network topology data and the planning data are integrated into the flow data, and the deleted data is extracted from the referential flow data so as to form the integral flow. The flow adjustment provides a practical method, the flow program is not modified in the method, the analysis is performed by adopting the result calculated by the flow; therefore, the method automatically realizes the flow balance with work or idle work, automatically adjusts overstep voltage and obtains the flow to meet the operation requirements. Moreover, the method provides initial values for the safe stability analysis and the auxiliary decision-making next, facilitates customizing a reasonable daily scheduling, and enhances security and stability of the power network.

The invention is concerned with a contact net system of high-speed electrical railroad made of some anchoring segments connecting with each other. Each anchoring segment relates to positioning device to wrist and arm, anchoring compensator, electric connecting equipment, suspension bowstring equipment and mid-point anchor equipment. The anchoring compensator sets at the two ends of each anchoring segment and the mid-point anchor equipment sets at the middle part of each anchoring segment. The connecting equipment of electricity sets at the inside of anchoring compensator and between the anchoring compensator and mid-point anchor equipment. Each anchoring segment has some positioning devices to wrist and arm and suspension bowstring equipments. It is fit to sustain, suspend, locate, machine, electric connecting and terminal anchoring to contact net system of electrical railroad with 200km / h, 50Hz single-phase and 25kV alternating current.

The invention discloses a multi-level voltage source current converter comprises at least one phase unit. Each phase unit comprises an upper bridge arm, a lower bridge arm and a current conversion electric reactor, wherein the upper bridge arm and the lower bridge arm respectively comprise at least two sub-modules, a switch loop and a bridge arm electric reactor all of which are sequentially connected in series; all sub-modules in the same bridge arm are connected in series in the same direction; the sub-modules, connected with the switch loop, in the upper bridge arm are opposite to the sub-modules, connected with the switch loop, in the lower bridge arm in polarity; one end, connected with the electric reactor in series, of the upper bridge arm and one end, connected with the electric reactor in series, of the lower bridge arm are connected and have access to an alternating current network through the current conversion electric reactor; the other end of the upper bridge arm and the other end of the lower bridge arm serve as a first direct current endpoint and a second direct current endpoint of the phase unit respectively to have access to a direct current network. Each switch loop comprises a plurality of anti-parallel thyristor pairs which are connected in series. The multi-level voltage source current converter is applied to flexible direct-current transmission and the like, and has the advantages of being small in number of the sub-modules, low in cost, small in consumption, capable of effectively blocking fault currents when the direct current side breaks down, and the like. The invention further discloses a control method of the multi-level voltage source current converter.

A process for generating a set of tests for a system includes identifying a plurality of factors to use in a design of experiments (DOE) test, using each of the plurality of factors in the DOE, identifying, through the DOE testing, one or more factors which have a significant effect an output of the system, including only the one or more factors in a Combinatorial design methodology (CDM) and generating a first test matrix based upon the CDM using the DOE inputs. The unique part of the process is then adding interactions of order greater than 2-way, as identified by the DOE, to the CDM matrix thus creating an optimized set of test cases. By using the sensitivity output of the DOE as an input to the final test matrix from the CDM, an affordable yet comprehensive test approach is provided.

A method for producing a fluidic device (2) for exciting an oscillating jet of predetermined oscillation and mixing characteristics. The fluidic device (2) includes a chamber (4) having a fluid outlet (6) longitudinally displaced from a fluid inlet (8). The fluid inlet (8) is disposed such that in use the fluid (10) entering the chamber (4) through the fluid inlet (8) separates from the inner surface of chamber (4) to excite an oscillating jet (12). The method includes the step of configuring the geometry of the shape and / or dimensions of the cross section of the fluid inlet (8) to determine the mode of oscillation and mixing characteristics of the oscillating jet (12). A fluidic device (2') for exciting an oscillating jet (12') whose characteristics can be determined to meet operational requirements.

The invention discloses a photovoltaic power storage distributed power generation alternating current traction power supply system and method. Anexistingout-phase power supply traction power supply system partition station is used foraccessing a photovoltaic power generation and storage system to the tail ends of traction networks of the left side and right side power supply partitions, bilateralpower supply is realized in each independent power supply partition through the distributed photovoltaic power generation and storage system, and double-end power source bilateral power supply of a traction power substation and a partition station photovoltaic power generation and storage systemis formed. According to the photovoltaic power storage distributed power generation alternating currenttraction power supply system and method,when the traction network is normal, the bilateral power supply of the traction power substation and the partition station photovoltaic power storage is enabledin the independent power supply partition, when the traction power substation malfunctions, cross-regional power supply by multiple power sources is realized by the adjacent traction substation and the partition station photovoltaic power storage, the voltage level of the traction network is improved, the power supply capacity is improved, and power is uninterruptedlysupplied for electric locomotives or electric motor train units; and at the same time power storage recycles locomotive regenerative feedback energy, the problem of high voltage level at the head end of the traction network caused by foldbackis avoided, and the stability and reliability of traction power supply is improved.

The invention discloses a terminal box which comprises a box body and a temperature and humidity control device, wherein the box body is in an enclosed structure; the temperature and humidity control device comprises a controller, an air conditioner, a dehumidifier, a temperature sensor and a humidity sensor. The temperature sensor and the humidity sensor are respectively used for collecting temperature and humidity signals in the box body and transmitting the temperature and humidity signals to the controller. The controller is used for respectively comparing the temperature and the humidity in the box body with set operating temperature and set operating humidity. Moreover, when the temperature in the box body is higher than the maximum operating temperature or is lower than the minimum operating temperature, the controller switches on the air conditioner. When the humidity in the box body is higher than the maximum operating humidity, the controller switches on the dehumidifier. According to the invention, the temperature and the humidity in the box body are adjusted by using the air conditioner and the dehumidifier respectively and the operating requirements on precision electrical elements in the box body are better met by controlling the operation of the air conditioner and the dehumidifier through the controller.

The invention discloses an automatic measuring device for precision of rolling linear guides. The device mainly comprises a lathe bed platform and a clamping device, wherein a portal frame and a measuring platform simultaneously move in the direction of a to-be-measured guide under the action of a Z-axis feeding part, transmission between roller racks and guidance of air floating guide pairs; under the action of a Y-axis feeding part, the measuring platform is driven through transmission of ball screws to move up and down relative to the portal frame. When the measuring platform moves, a laser displacement sensor mounted on the measuring platform measures every form and position error of the to-be-measured guide arranged on the platform and fixed by the clamping device, acquired data are subjected to correlative processing, and required data are obtained through analysis, so that every form and position error of the to-be-measured guide is obtained. With the adoption of an automatic measuring method, the to-be-measured guide is mounted without assistance of bolts, the efficiency can be greatly improved, furthermore, the universality is higher, and the device can be used for measuring the precision of multiple models of the rolling linear guides.

The invention discloses a compressed air energy storage system comprising an energy storage part and an energy release part, wherein the energy release part comprises an ejector, a first heat storage / exchange device, a turbo-expander and a generator; the energy storage part is connected with an inlet of the ejector; an outlet of the ejector is connected with the first heat storage / exchange device; the first heat storage / exchange device is connected with an inlet of the turbo-expander; an entraining hole of the ejector is connected with the turbo-expander to realize air exhaust; and the turbo-expander is connected with the generator. An air compressor of the energy storage part of the compressed air energy storage system is used for injecting compressed air into an air storage chamber, the compressed air flows out from an outlet of the gas storage chamber and enters the ejector, low-pressure exhausted air of the turbo-expander enters from the entraining hole of the ejector, the mixing of high-pressure air and low-pressure air is realized in the ejector, then the mixed air is heated in the first heat storage / exchange device, and the heated airflow enters the turbo-expander to do work and drive the generator to output stable electric energy.

A deep brain stimulation device including:a probe (60) having a transparent distal portion, crossed by a channel (28) open at a proximal end of the probe, and including electrodes (20a, 20b, 20c, 20d) affixed to the distal portion of the probe and electrode terminals (22a, 22b, 22c, 22d) affixed to a proximal portion of the probe;an electrical housing including a channel open at its two ends and housing electrical terminals in contact with the terminals (22a, 22b, 22c, 22d) of the probe; andan electrical extension lead affixed to the housing and connected to the terminals of the housing.The channel of the housing is open at the other one of its ends and the device further includes:a waveguide (50) at least partly housed in the central channel (28) of the probe, all the way to the distal portion of the probe; anda transmitter housing capable of being connected to the waveguide (50) for the injection of a predetermined wavelength.

The invention discloses an organic / inorganic composite material for rapidly repairing pit slots of a bituminous pavement, which is prepared from the following main raw materials of polymethylene polyphenyl polyisocyanates, a polyurethane prepolymer, polyether polyol, petroleum asphalt, a catalyst, sodium silicate powder, carborundum and the like. The composition material comprises components A, B and C, wherein the components A and the component B are blended with the component C after being mixed, and can be quickly solidified after being cast into the pit slots at room temperature, so that the composite material has strong caking property and similar rigidity with an original bituminous pavement, and the travelling stationarity and comfortableness are achieved after restoration. The composite material is simple and convenient to construct, rapid, efficient and environmentally friendly, the setting time is smaller than or equal to 30 minutes, and the bituminous pavement can be opened after 90 minutes, so that the rapid repairing purpose is achieved, and the effect on traffic jam caused by pavement rehabilitation is greatly relieved. The composite material has excellent water tolerance, weather fastness, abrasive resistance and compressive shear resistance, is a novel green material for rapidly repairing pit slots of a pavement, and has positive promotion action and a good application effect on development of a preventive maintenance technology of highways.

The invention discloses a locking multi-mode lever-type variable valve driving system, belonging to the field of engine valve driving. The variable valve driving system mainly comprises a cam shaft, a mode input mechanism, a mode output mechanism, a mode switching mechanism, a valve regulating lever, a valve control mechanism and the like. By using the mode switching mechanism, the switching among multiple modes, including a two-stroke driving mode, a four-stroke driving mode, a two-stroke braking mode, a four-stroke braking mode and the like, of an engine is realized, further, by matching with the valve control mechanism for use, the optimum ventilation under different working conditions of the engine is finally realized, and the aims of comprehensively improving the engine dynamic property, fuel economy, emission performance and braking security are achieved. The invention is proposed by aiming at practical application, the reliability is high, the structure is compact, the requirements of a system on all the mechanisms are reduced, relatively mature technologies are adopted by all the mechanisms, the practical potential of the system in a short time is high, and the application prospect is good.

The invention mainly relates to a small-sized fragrant-flowered garlic harvesting and binding machine which comprises a self-walking rack. Storage batteries and a program control device are arranged at the right side of the rear of the self-walking rack. An adjustable handle and a storage are arranged at the rear end of the self-walking rack. An engine, a traveling box, a header clutch, a header gearbox and a main transmission box are arranged at the left side of the self-walking rack, wherein a main transmission shaft which is in power connection with the engine and two walking half shafts which are in transmission connection with the transmission shaft are arranged in the walking box. Two walking half shafts are connected by a differential mechanism and traveling wheels are arranged at the end parts of the two traveling half shafts. Dividers are horizontally and uniformly arranged at the front end of the self-waling rack. A cutting device is arranged at the lower side of the front end of the self-walking rack. The small-sized fragrant-flowered garlic harvesting and binding machine disclosed by the invention can be used for cutting and binding fragrant-flowered garlic, so that the efficiency of labor is greatly increased, the labor intensity is reduced and the small-sized fragrant-flowered garlic harvesting and binding machine is applicable to popularization and application.

The invention relates to a preparation method of aluminum nitride (AlN) nanoparticle modified transformer oil, and belongs to the technical field of electric power industrial transformer oil preparation. AlN nanoparticle modification is divided into the following two steps: 1, AlN nanoparticles are dissolved in anhydrous ethanol, ultrasonic treatment and ball milling are adopted to graft the surface of the AlN nanoparticles with KH550, and heating and drying are carried out to obtain modified particles (1); and 2, ball milling is adopted to graft the surface of the modified particles (1) with oleic acid, and heating is carried out to obtain the finally modified AlN nanoparticles. The modified AlN nanoparticles and transformer oil are mixed and undergo ultrasonic dispersion to obtain the AlN nanoparticle modified transformer oil. The AlN nanoparticle modified transformer oil prepared through the preparation method has the advantages of excellent heat conduction performance and electrical performances, good long-term stability, and guaranteeing of the stability and the reliability in the service period.

The invention discloses a generating method for digital TV dynamic video stream carrying two-dimensional code labels. A desktop application used for dynamic display is deployed on an application server by a manager, and the rule for dynamically generating video streams is configured; one path of video stream needing to be forwarded is selected, and an instruction is sent to an application streaming server according to configuration; the desktop application is started by the application streaming server, the application streaming server acquires the bitmap / audio information of the desktop application, performs real-time coding to generate video streams and outputs the video streams to an appointed network device address, and the display frame of the desktop application includes two-dimensional codes; the video stream are transmitted to a set top box of a user through a digital TV network and decoded to be played on a TV set of the user; relevant information can be obtained by the user by scanning the two-dimensional codes. According to the method, through the two-dimensional code technology, the problems that manual input is inconvenient and information is single are solved; through the dynamic desktop real-time streaming application technology, the requirement of differentiation display of different targets in different time frames is met, and the operating requirement for real-time / batched video stream generation is also met.