Please select the most similar patent number from A, B, C and D. Which number is?
A method and a device for visitor traffic statistics. The method comprises: obtaining first device information in respect of devices within a target area, said information being detected by means of a first communication mode (101); determining a first quantity in respect of the devices within the target area according to the first device information (102); calculating a second quantity in respect of the devices within the target area according to the first quantity and a calibration factor, and using the second quantity as the real-time visitor traffic of the target area, wherein the calibration factor is acquired as second device information detected on the basis of a second communication mode (103). In the method and the device for visitor traffic statistics, in comparison to the prior art, it is possible to increase the accuracy of visitor traffic statistics because the calibration factor is not set artificially, but rather is acquired as second device information detected based on a second communication mode.
A: An information updating method and apparatus, and an electronic device and a readable storage medium. The method comprises: obtaining first device information of a smart device from a target server (S101); determining whether a version number in the first device information is greater than a version number in second device information stored in a local database (S102); if the version number in the first device information is greater than the version number in the second device information stored in the local database, searching the second device information for target device names that are the same as a device name in the first device information (S103); and if the target device names that are the same as the device name in the first device information can be found, for each target device name, updating device attributes in the local database according to the first device information (S104). The method can quickly achieve the updating and increase an updating speed by updating the second device information in the local database without updating mesh gateway software.
B: A method of controlling a washing machine, a control device, and a control system. The method comprises: receiving apparatus information and fault information of a washing machine (410) transmitted by the washing machine (410); querying an installation information database about a first quantity of washing machines (410) in a preconfigured area and having apparatus information identical to that of the washing machine (410); if the first quantity exceeds a first preconfigured threshold, querying a warning history database about a second quantity of washing machines (410) having fault information identical to that of the washing machines (410) in a preconfigured time interval in the preconfigured area; and determining a cause of a fault on the basis of the first quantity and the second quantity.
C: The present invention provides a statistical method and apparatus for passenger flow. The method comprises: obtaining physical coordinate information of one or more monitored areas; determining, according to the physical coordinate information, base station configuration information, and cell configuration information, information about a cell covering the one or more monitored areas; and making statistics on passenger flow of the one or more monitored areas by counting users in the cell covering the one or more monitored areas. The present invention solves the problem that to improve statistical precision, all statistical methods in the prior art require system upgrade and/or renovation; therefore, high-precision statistics can be implemented without upgrading and/or renovating the system, which makes high-precision statistics more convenient.
D: A navigation method, apparatus (1201, 1301, 1401), map and system. The method comprises: a first device acquiring environment information; determining, according to the environment information, a second passing manner for a target passing area; and sending a second passing manner notification message to a second device. Therefore, the first device enables, according to the second passing manner notification message, the second passing manner for the target passing area in a map, and disables a first passing manner for the target passing area in the map. A second passing manner, which is suitable for the current environment, and a first passing manner, which is currently enabled in a map, are jointed to uniformly guide the passing of a second device, so that not only can the second device complete passing in real time according to the passing manner that is suitable for the current environment, a vehicle owner is also not required to participate in decision making. The method is effectively compatible with various map navigation scenarios, including an autonomous driving scenario, and facilitates the improvement of the planned traffic capacity of the second device.
Answer: C