51results about How to "Realize check" patented technology

The invention is applicable to the technical field of computers, and provides a learning content reviewing method and apparatus. The method includes the steps of receiving a reviewing instruction sent by a first user through a first user terminal, obtaining and outputting contents to be reviewed according to a storage identifier and / or a storage address upon reception of the confirmation information of reviewing execution instruction of a second user, receiving the user answers inputted by the second user and corresponding to the contents to be reviewed, checking the user answers according to the preset question check means, outputting corresponding check results including the questions corresponding to the wrong answers in the user's answers, obtaining exercises associated with the corresponding questions, and pushing the exercises to the second user according to a preset pushing means. Automatic obtaining and checking reviewing excises are realized, excises pushing service aiming at questions that a user answers incorrectly is provided, and the availability of reviewing contents and questions and reviewing efficiency are improved.

The invention discloses a method and system for measuring a simulation friction coefficient of a belt conveyor. The method comprises the steps of online measuring the running electric power, a running belt speed and a flow distribution situation of the belt conveyor in real time, acquiring a sampled height difference spreadsheet offline through an automatic programming extraction way, and calculating the simulation friction coefficient value of the belt conveyor according to the height difference value acquired through the terrain distribution situation of the belt conveyor, the design parameters and flow distribution data array of other belt conveyors and the flow distribution data array in an area corresponding to a tilting roller. The real-time running data is utilized to precisely calculate the simulation friction coefficient under different running environments (such as the temperature, humidity and the like), so that the actual maximal conveying capacity of the belt conveyor can be efficiently controlled, the equipment can be reasonably utilized, and the service life of the equipment can be improved. A great amount of data statistics shows that the cost can be saved by 10 percent only by utilizing the method and the system to optimize the capacity of the belt conveyor with experimental evidence.

The invention provides a large-scale aircraft test steady-state load analysis method under the condition of multiple environmental factors, belonging to the technical field of aircraft testing, comprising the following steps: S1, setting parameters; S2, calculating the area of ​​the insulation board of the aircraft climate laboratory; S3, calculating the aircraft climate experiment indoor lighting load; S4, calculate and compensate the fresh air heat load; S5, calculate the heat load of the fan; S6, calculate the heat load of the insulation board; S7, calculate the heat load of the solar radiation array; S8, calculate the heat load of freezing rain / snowfall conditions; 1. Calculating the heat load of the floor; S10. Calculating the heat load of the test piece object; S11. Calculating the heat load required by the refrigeration system. The invention solves the problem that the calculation of the steady-state load of the large-scale aircraft test is not perfect under the condition of multiple environmental factors at present, and the problem that the design basis cannot be provided for the type selection and configuration of the refrigeration system has the advantages of comprehensive consideration of interference factors and accurate calculation.

The invention discloses a method for checking a differential protection secondary circuit of a transformer, and belongs to the field of differential protection of an electric power system. Through a mode of arranging a three-phase large current generator on the low voltage side of the transformer, the checking method solves the problem that an on-load test of secondary connection of a differential protection current transformer of the transformer cannot be carried out because the load current of the conventional to-be-protected transformer is too low. The checking method judges whether the parameter setting of a differential protection device is correct by means of comparing the induced current, acquired by the differential protection device, of a secondary winding of the current transformer with the theoretical value. The checking method judges whether the connection of a differential protection secondary circuit is right according to the condition that whether the differential current is 0. The checking method judges whether the polarity of the current transformer of the differential protection secondary circuit is correct according to the condition that whether the induced current of the secondary winding of the same-side three-phase current transformer is in a positive phase sequence. The method is suitable for checking the differential protection secondary circuit of the transformer.

The invention discloses a constant value sensitivity check method applicable to single-return-wire tandem-connection double-return transmission line distance protection. According to the working mode, for a single-return-wire interval, a measured impedance calculation expression in fault of the single-return-wire interval is formed on the basis of the characteristic that measured impedance in fault and fault distance are in direct proportion according to a full-line circuit and system impedance parameters; for a double-return-wire interval, according to a grid structure, a circuit and system impedance parameters of a transmission line, circuits and system impedance outside a double return wire are merged to form a typical system layout of power sources at the two ends of the double return wire, then, the calculation mode with which measured impedance changes according to positions of fault points is formed according to the impedance parameters, and different calculation expressions are adopted for one-phase grounding and phase-to-phase faults; all the results are combined, the calculation expression of full-line measured impedance in one-phase grounding and phase-to-phase faults according to the positions of the fault positions is formed, the maximum value of the measured impedance in full-line fault is acquired, and the maximum value is compared with a distance protection element constant value so that the sensitivity of the distance protection element constant value can be checked.

The invention discloses a remote verification system and method for telecontrol forwarding data of a transformer substation. The system comprises a transformer substation, a dispatching master stationand an operation and maintenance center master station, wherein the dispatching master station is connected and communicated with the operation and maintenance center master station through a servicebus, and the dispatching master station and the operation and maintenance center master station are separately connected and communicated with the transformer substation through a high-performance general service protocol (GSP). According to the remote verification system and method disclosed by the invention, the following three modes of verification functions can be achieved: 1, the consistencyverification of master sub-station forwarding table data is directly implemented at the dispatching master station; 2, the operation and maintenance center master station separately performs interaction with the dispatching master station and sub-station at an operation and maintenance center at the master station side, and the consistency verification of the forwarding table data between the dispatching master station and the transformer substation is implemented; and 3, at the operation and maintenance center at the master station side, the consistency verification of all channel data and forwarding table data of different telecontrol equipment in areas I and II is implemented. According to the remote verification system and method, safe and stable operations of power grids can be reliably guaranteed through multiple remote verification.