179results about How to "Precise and effective control" patented technology

The invention provides a method for improving the capacity of a multi-feed-in direct current power transmission system against a phase commutation failure. The method comprises the steps of step 1, serially connecting a changeable inductance device with dynamically adjusted reactance on a call wire of any two direct current power transmission systems of the multi-feed-in direct current power transmission system; step 2, monitoring whether each direct current power transmission system has the phase commutation failure or not in real time; step 3, when the condition that any direct current power transmission system has the phase commutation failure is judged, sending a phase commutation failure signal into a reactance regulation controller of the changeable inductance device on each of the call wires of the direct current power transmission system subjected to the phase commutation failure and other direct current power transmission systems, and increasing the reactance values of the changeable inductance devices on the call wires of the direct current power transmission system subjected to the phase commutation failure and other direct current power transmission systems. According to the method for improving the capacity of the multi-feed-in direct current power transmission system against the phase commutation failure, the condition that a once direct current fault causes multiples times of direct current faults in the multi-feed-in direct current power transmission system is avoided.

The invention provides a wind tunnel experiment strut vibration suppression system and method based on a piezoelectric technology. The system comprises a laser displacement sensor, a data collector, a control calculation module, a closed loop amplification module and a piezoelectric actuator. The method comprises the steps that: the laser displacement sensor collects the normal vibration displacement of a controlled strut; a normal vibration displacement signal is converted into a normal vibration displacement digital amount through the data collector; the normal vibration displacement digital amount is used as feedback control and is sent to the control calculation module; an actuating control voltage signal is obtained through performing PID control in the control calculation module; the actuating control voltage signal is amplified to drive the piezoelectric actuator to generate an actuating force to increase structure damping of the system, so that the vibration of the strut in the wind tunnel experiment is suppressed, the strut vibration caused by the impact of a wind tunnel starting impacting load to the model is reduced, the wind tunnel test device and the tested model structure are protected and the signal to noise ratio of the dynamic wind tunnel experiment data is increased.

An axial forcing device for winding displacement of a superconducting coil comprises a support arm, a guide arm, a forcing spring, a wire pressing wheel, an angular displacement sensor and a signal processing module. The axial forcing device is fixedly installed at the top portion of a winding machine creel stand through the supporting arm, abuts tightly against the superconducting coil through the wire pressing wheel, applies axial pressing force, and is connected with a control component of a winding machine system through the angular displacement sensor and the signal processing module. The guide arm is wholly in a C-shaped structure, the upper end of the guide arm is hinged to the support arm, the middle portion of the guide arm is connected and fixed with the forcing spring, and the lower end of the guide arm is connected with the wire pressing wheel. The angular displacement sensor is used for measuring the included angle between the guide arm and the support arm, and the signal processing module is used for receiving real-time angle signals transmitted by the angular displacement sensor and real-time position signals of the winding machine creel stand, and regulating the operation of the winding machine creel stand. On the premise that an existing superconducting coil automatic winding displacement device is not changed, a few components are added, and accurate control of the inter-turn interval of the superconducting coil is achieved.

The invention discloses a payment control method and device based on ETC equipment, and the method comprises the following steps of, by a vehicle access management system, receiving an identificationinformation set sent by the ETC wireless communication equipment located at a vehicle exit and receiving a current vehicle identifier that is synchronously recognized by vehicle identifying equipmentcorresponding to the ETC wireless communication equipment, and determining whether there is identification information matching the current vehicle identifier in the received identification information set; if so, determining that the payment method of the vehicle corresponding to the current vehicle identifier includes an automatic deduction method of the ETC electronic account and that the payment information at the vehicle exit is associated with the vehicle; and if not, determining that the payment method of the vehicle does not include the automatic deduction method of the ETC electronicaccount. It can be seen that the implementation of the invention can improve the payment control accuracy rate of the payment required for the vehicle, can also reduce the misidentification operationof the ETC vehicle equipment on the adjacent or similar vehicle passage, and is beneficial to realize the effective and accurate control of leaving vehicles.

The invention discloses an adaptive prediction control method based on the Hammerstein model. The adaptive prediction control method based on the Hammerstein model specifically comprises a first step that a data collection channel collects technological parameter values in the process of intermittent chemical production in real time and conducts data pre-processing, a second step that the processed data are transmitted to a neural network identifier, modeling is conducted by the neural network identifier, and the established model is revised in a simulating mode, a third step that a mixed adaptive prediction controller reads model parameters, and generates a control parameter to control motions of an executing mechanism, and a fourth step that a control algorithm is achieved. According to the adaptive prediction control method based on the Hammerstein model, a control system is designed through the control method based on the Hammerstein model, a nonlinear inversion element is introduced, prediction strategy is designed aiming at a linear element, and then the actual controlled quantity is determined through solving of a nonlinear algebraic equation set. Therefore, the calculated quantity of on-line optimization is reduced, and precise effective control over the intermittent chemical process is achieved.

The invention provides an air-conditioner long-distance automatic control system and method based on a GPS. The air-conditioner long-distance automatic control system comprises an intelligent router, an intelligent terminal with a WLAN function, a big data center and an air conditioner with a WLAN function; the intelligent terminal is used for obtaining and sending self GPS positioning information to the big data center; the big data center is used for storing house addresses of users and home arrival time of the users, calculating home arrival preset time of the users when it is judged that the users plan to go home, and sending the home arrival preset time to the intelligent router; the intelligent router is used for judging whether the home arrival preset time of the users is within a certain scope of the user home arrival preset time; the air conditioner is controlled to be started if the home arrival preset time is within the certain scope of the user home arrival preset time; and the air-conditioner is automatically started or stopped under control of the intelligent router. By means of the air-conditioner long-distance automatic control system and method based on the GPS, manual operation is not needed, air-conditioner control can be carried out in advance, and it is guaranteed that a preset indoor temperature can be obtained when the users arrive at a room.

The invention discloses a temperature control system applicable to a pump laser, comprising a temperature sensing circuit, a differential processing circuit, a temperature setting circuit, a photoelectric isolated circuit, a multimode temperature control circuit, a current limiting circuit, a thermoelectric refrigerator driving circuit and a microcontroller, wherein the temperature sensing circuit detects the temperature in the laser and converts the temperature into a voltage value; the voltage value and a set value of the temperature setting circuit form a deviation signal after being processed by the differential processing circuit; a driving signal is generated after the deviation signal is processed by the multimode temperature control circuit; the driving signal drives a thermoelectric refrigerator in the laser to work as input of the thermoelectric refrigerator driving circuit; and the current limiting circuit can set maximum working current of the thermoelectric refrigerator according to the needs, so that the automatic control of the temperature of the laser is realized.

The invention discloses an air conditioner and a control method and device thereof. The control method of the air conditioner comprises the following steps that the indoor actual temperature, the indoor set temperature, the outdoor environment temperature and the indoor actual humidity of the air conditioner are obtained; according to the indoor actual temperature and the indoor actual humanity, the indoor enthalpy moisture content is obtained through calculation; if the indoor enthalpy moisture content is larger than a preset comfortable enthalpy moisture content threshold value, the air conditioner is controlled to operate according to running parameters; according to the indoor actual temperature, the indoor set temperature and the indoor enthalpy moisture content, a target capacity output value of the air conditioner is obtained through calculation; an actual capacity output value and the air outlet temperature of the air conditioner are obtained; and the air conditioner is controlled according to the target capacity output value, the actual capacity output value, the indoor actual temperature and the air outlet temperature. Therefore, according to the control method of the airconditioner, the running capability of the air conditioner can be accurately judged, moreover, the running parameters of the air conditioner are correspondingly adjusted in time based on the runningcapability so as to meet the requirements of a user, and the comfort degree of the user is greatly improved.

The invention discloses a construction method of sinking a mattress along water current for river waterway regulation, which comprises the steps of mapping underground in a mattress-sinking region, drawing up the trajectory of sinking the mattress along the water current, positioning a mattress-sinking ship, fabricating a soft mattress, sinking the mattress and the like, thereby creating the beginning of mattress-sinking construction along the water current for the bottom protection-based concrete block soft mattress; in addition, the construction method can carry out accurate and effective control on a geotextiles-laying vessel and ensure the construction safety and the construction quality by reasonably setting a ship anchor of the geotextiles-laying vessel; additionally, the construction method can also powerfully protect the construction quality by carrying out precise positioning on a mattress head and a mattress tail of the soft mattress, carrying out real-time tracking on the geotextiles-laying vessel, carrying out comparison and analysis and adjusting the construction deviation in time.

The invention relates to an light wavelength converter which can be applied to convert light of a first wavelength. The converter comprises a first substrate, a first wavelength conversion material and a second substrate, wherein the first substrate includes a first section. The first wavelength conversion material is arranged in the first section, and used to convert the light of the first wavelength into light of a second wavelength, and the light of the second wavelength is reflected by the first section. The second substrate is arranged adjacent to the first substrate, and includes a second section, and the second section is arranged interlaced with the first section so that the light of the first wavelength can pass. Thus, laser spots can uniformly and stably penetrate the light wavelength converter, the light wavelength converter can be effectively and accurately controlled, ratio errors of the spots can be avoided, the intensity and chroma of emergent light are stable, and the quality of light is improved.

The invention discloses a virtual desktop login method based on the face recognition technology. The method includes the steps that S1, a facial image is acquired to be processed to obtain sample information, and the sample information is stored to a background database; S2, when a foreground performs virtual desktop login, facial information is firstly acquired; S3, the facial information is compared with the sample information in the background database to achieve identity authentication, if a person passes the authentication, the person can login a virtual desktop, otherwise, the person is refused to login the virtual desktop, and prompting information of login errors is issued. According to the virtual desktop login method based on the face recognition technology, the face recognition technology is applied to login of the virtual desktop, the time that a user name and a password need to be input manually every time of the login is performed is saved, the user can conveniently and fast login, and due to the fact that the face has uniqueness and is not prone to being copied and stolen for use, safety of user information can be ensured.

A process for preparing nanometer-spaced electrodes comprises steps of preparing electrode pairs with larger gaps on nano materials which can not be destructed by electron beams, adsorbing raw material molecules induced and deposited by the electron beams on the surface of the electrode pairs, focusing the electron beams on gap areas of the electrode pairs and stopping irradiation by the electron beams to prepare and obtain the nanometer-spaced electrodes, when the gaps of the electrodes achieve the required width. Compared with the traditional process, the gaps of the electrodes can be observed in-situ in the process of preparation of the invention, thereby accurately controlling the gaps of the nanometer-spaced electrodes. Simultaneously, the invention has the advantages of convenient operation, simplicity and feasibility and high success rate, which is favorable for increasing preparing efficiency of the nanometer-spaced electrodes. The prepared nanometer-spaced electrodes have quite wide gap range from 2 nanometers to 100 nanometers, which is extremely significant for the control and application of nano and molecular devices.

The invention provides a social network representation method based on bidirectional distance network embedding, and belongs to the technical field of data mining and networks. The method comprises the following steps: firstly, reading nodes in a social relation network and encoding; secondly, reading a concerned and concerned relationship, respectively generating an upper text neighbor node sequence and a lower text neighbor node sequence with the window size of k for each node, and recording a directed distance from each neighbor node to the node; constructing a three-layer network embeddingmodel; learning by taking the node coding set as input, and continuously adjusting model hyper-parameters; and finally, taking the weight matrix of the hidden layer as a final network embedding result, and taking the vector representation of each row as the vector representation of the node. According to the method, the problems that the structure and topology information of the existing social relation network are inaccurate in representation, the capability of restoring the real social relation is low, network data cannot be effectively processed, and the development of events cannot be accurately and effectively controlled are solved. The method can be used for social network representation.

The invention discloses an air conditioner and a control method and device thereof. The control method can comprise the following steps that when the air conditioner runs in an automatic temperature rise mode, the air return temperature and the air outlet temperature of an indoor unit are obtained; according to the air return temperature and the air outlet temperature of the indoor unit, the air return temperature of the indoor unit is controlled to be smaller than or equal to the set temperature; the air return temperature and the air outlet temperature are continuously obtained, and if the temperature difference between the continuously-obtained air return temperature and air outlet temperature is in the preset first temperature range, the running frequency of a compressor is controlledto be reduced, and accordingly the air return temperature is increased to be in the preset second temperature range. Accordingly, when the air conditioner runs in the automatic temperature rise mode,the indoor temperature can be accurately and effectively controlled to be reduced to be lower than the set temperature, and accordingly the requirements of users are met; and after maintaining is conducted for a period of time, the indoor temperature is accurately and effectively increased by a certain temperature, the cold feeling caused by the too low human body surface temperature is avoided, and the user experience degree is greatly improved.

The invention discloses an air conditioner and a control method and device thereof. The control method of the air conditioner comprises the following steps that the indoor actual temperature, the outdoor environment temperature and the indoor actual humidity of the air conditioner are acquired; according to the indoor actual temperature and the indoor actual humanity, the indoor enthalpy moisturecontent is obtained through calculation; if the indoor enthalpy moisture content is larger than a preset comfortable enthalpy moisture content threshold value, a target capacity output value and a target dehumidifying value of the air conditioner are obtained through calculation according to the indoor actual temperature, the indoor set temperature and the indoor enthalpy moisture content; an actual dehumidification value of the air conditioner is obtained through calculation; and the air conditioner is controlled according to the target capacity output value, the target dehumidification value, an actual capacity output value and the actual dehumidification value. Therefore, according to the control method of the air conditioner, the running capability of the air conditioner can be accurately judged, moreover, running parameters of the air conditioner can be correspondingly adjusted in time based on the running capability so as to meet the requirements of a user, and the comfort degreeof the user is greatly improved.

The invention discloses an internal formation process for a high-capacity gel battery, which comprises the following steps in turn: assembling a battery, pouring dilute sulphuric acid with the density of 1.240g/cm3 into the battery, wherein the dilute sulphuric acid is prepared from concentrated sulfuric acid and water, and 1 to 1.5 weight percent of sodium sulfate, 0.1 to 0.5 weight percent of potassium sulfate and 0.2 to 0.6 weight percent of stannous sulfate are added into the dilute sulphuric acid; charging and discharging I; pouring gel into the battery, wherein gel electrolyte prepared by mixing 3 to 5 weight percent of silica, 0.1 to 0.5 weight percent of polyethyleneglycol, 0.5 to 1.2 weight percent of sodium sulfate and the balance of water is quantitatively poured into the battery under vacuum; charging and discharging II; grouping the battery; and packing the battery. The internal formation process for the high-capacity gel battery has the advantages that: the sulphuric acid after charge and discharge and the aqueous solution of silica are mixed naturally to form the gel having a uniform and stable structure; the actual sulphuric acid amount in the battery can be controlled precisely and effectively; the grouping precision of the storage battery can be controlled; the consistency of the storage battery is improved; and the service life of the storage battery is prolonged.

The invention discloses an assembly system and an assembly method for a press-mounted bushing. The assembly system comprises a mounting machine board and an assembly device, wherein an engine body is fixed on the mounting machine board; the assembly device is fixed on the mounting machine board and comprises an automatic press-mounted device; the automatic press-mounted device comprises a first servo press-mounted device provided with a first pressing head guiding device and a second servo press-mounted device provided with a second pressing head guiding device; the first pressing head guiding device and the second pressing head guiding device are oppositely arranged on two sides of the engine body. The assembly method comprises the steps of firstly, mounting bushings on the second pressing head guiding device and the first pressing head guiding device; secondly, transferring the bushing on the second pressing head guiding device and the bushing on the first pressing head guiding device to the inside of the engine body by press mounting. According to the assembly system and the assembly method which are disclosed by the invention, automatic guide press mounting is realized; high assembly efficiency and high assembly precision are obtained; besides, accurate and effective control over the mounting phase and depth is realized.

The invention relates to the field of continuous casting function refractory materials and provides a ladle slag feather edge brick of a waste submersed nozzle slag line sludge material. The waste submersed nozzle slag line sludge material is mainly derived from a submersed nozzle used in a continuous casting workshop, a submersed nozzle slag line part mainly has the component of zirconium oxide,and the zirconium oxide used at the submersed nozzle is stabilized and has the advantages of being high in melting point, good in corrosion resistance, excellent in chemical stability, oxidation resistance and thermal shock stability, high in high temperature strength, very good in slag abrasion resistance, peeling resistance and molten steel impact resistance, and the like. Due to adoption of thewaste submersed nozzle slag line sludge material in the ladle slag feather edge brick, the slag abrasion resistance and the peeling resistance of the slag feather edge brick can be greatly improved,the service life of a ladle can be prolonged, the consumption of a ton steel refractory material can be reduced, pollution of the refectory material upon molten steel can be reduced, the wastes can beturned into wealth, the treatment expense of waste refractory materials can be reduced, and the environment pollution caused by the refectory materials and land occupation pressure can be reduced.

The invention discloses a method for analyzing charge and discharge capacity of large-scale energy storage clusters. The method comprises the following steps of respectively computing specific parameters of pre-selected energy storage power station clusters according to the telemetering amount and the remote signaling amount which are uploaded by each energy storage power station, and determiningmaximum available time meeting set charge and discharge power and maximum available charge and discharge power meeting set charge and discharge time of each energy storage power station cluster according to the computed specific parameters of the energy storage power station cluster. According to the method, the charge and discharge capacity of each energy storage set as a whole of energy storageresources is analyzed, and a powerful data support is provided for the power control characteristics after the large-scale energy storage power stations are connected to a power grid, so that the control is more effective and accurate.

The invention discloses an in-flight auto-ignition control method of an engine of an unmanned aerial vehicle. The method comprises: (11), detecting whether a ground control station is out of control, or whether the engine of the aerial vehicle is subjected to accidental flameout and shut down; (12), if the ground control station is out of airplane control ability, or the engine of the aerial vehicle is subjected to accidental flameout and shut down, executing the step (13); (13), detecting whether the communication link between the unmanned aerial vehicle and the ground control station is normal, if the communication link between the unmanned aerial vehicle and the ground control station is normal, executing the step (14); (14), detecting whether the engine working condition information and the aerial vehicle flight state meet operation requirements, if the engine working condition information and the aerial vehicle flight state meet the operation requirements, executing the step (15); and (15), detecting whether a throttle servo, an accelerator servo and a task servo of the engine can work normally, if the throttle servo, the accelerator servo and the task servo of the engine can work normally, carrying out an ignition command, and restarting the engine; if the throttle servo, the accelerator servo and the task servo of the engine cannot work normally, stopping sending the ignition command. The method can be applied to reignition and starting of the unmanned aerial vehicle after fault recovery, the aerial vehicle can be effectively protected, and the flight cost is reduced.

A wireless communication-based methane fermentation management and control system disclosed by the present invention comprises a main control module, a power supply module, a data acquisition module, a display alarm module, a fermentation adjusting and processing module, a storage module, a communication module and a mobile reception control terminal, wherein the data acquisition module is used to acquire the temperature, humidity, PH value, atmospheric pressure, methane concentration, ammonia concentration and hydrogen sulfide concentration data and real-timely send to the main control module or the storage module to process, and the main control module sends the corresponding instruction signals to the data acquisition module, the display alarm module, the fermentation adjusting and processing module, the storage module and the communication module, and also can transmit the information with the mobile reception control terminal real-timely. The wireless communication-based methane fermentation management and control system of the present invention can detect the relevant parameter information in a fermentation room real-timely, at the same time, can control and adjust the relevant parameters and the environment humiture automatically according to the demands, is accurate to monitor and intelligent and flexible to control, is high in sensitivity and little in energy consumption, and has a higher practical value and the wider application prospect.

The invention belongs to the field of biomedical engineering, and particularly relates to a method for inducing mesenchymal stem cells to be directionally differentiated into osteoblasts. The method for inducing the mesenchymal stem cells to be directionally differentiated into the osteoblasts has the advantages that the problem of deficiency of a simple, convenient, economical, safe and effectivemethod for inducing mesenchymal stem cells to be differentiated into osteoblasts in the prior art can be solved; macromolecular three-dimensional structures are constructed, appropriate micro-environments are provided, collagen composition and mediation intercellular signal cascade amplification are adopted, culture is carried out on the mesenchymal stem cells in osteogenic induction culture media, accordingly, expression of osteogenesis-related transcription factors can be strengthened, and the mesenchymal stem cells can be promoted to be differentiated into the osteoblasts.

The invention discloses an air conditioner and a control method and device thereof. The control method of the air conditioner comprises the following steps that the current temperature in a room is acquired, and the air outlet temperature and the air return humidity of the air conditioner are obtained; the target capacity output value and the target dehumidifying value of the air conditioner are determined according to the indoor current temperature and the air return humidity; the actual capacity output value of the air conditioner is obtained, and the actual dehumidification value of the airconditioner is acquired according to the actual capacity output value of the air conditioner; and the air conditioner is controlled according to the target capacity output value, the target dehumidification value, the actual capacity output value and the actual dehumidification value. Therefore, according to the target capacity output value and the target dehumidifying value, the actual capacityoutput value and the actual dehumidification value, the current running state of the air conditioner can be accurately judged, the running parameters of the air conditioner are correspondingly adjusted in time based on the running state, and therefore the dehumidification stage of the air conditioner can be accurately and effectively controlled, the requirements of a user can be met, and the comfort degree of the user can be greatly improved.