Abstract: A data model computing device receives a first data model with a first set of attributes, a first margin of error, a first set of predictions, and an underlying data set. Subsequently, the data model computing device receives a second data model with a second set of attributes, as the test data for a machine learning module. Based on the first and second data model, the machine learning function generates a second set of predictions and a second margin of error. The data model computing device performs a statistical analysis on the first and second set of predictions and the first and second margin of error to determine if the second set of predictions converge with the first set of predictions and second margin of error is narrower than the first margin of error, to determine if the second data model improves the prediction results of the machine learning module.

Abstract: An Internet of Things equipment management system and an operation method thereof are provided. The operation method includes: obtaining, by a wearable camera, a group number and a user name of the wearable camera from a client-side server; obtaining, by a mobile application, the group name from the wearable camera; scanning a barcode of a sensor to obtain a serial number of the sensor and writing the group name to the sensor by the mobile application; pairing, by the mobile application, the group name and the serial number to establish a pairing relationship between the wearable camera and the sensor; and transmitting, by the mobile application, the pairing relationship to the client-side server.

Abstract: A connection module is disposed in a main circuit board and includes a card edge connector, a hard circuit board and two connectors. The card edge connector is fixedly disposed on the main circuit board. The hard circuit board has a board body and a connecting tongue for correspondingly plugging with the card edge connector. The board body is configured with a disconnecting notch, and the board body is separated by the disconnecting notch into two floating plates arranged side by side at an interval and floatable using the disconnecting notch. The connectors are respectively fixed to the floating plates. Thus, without needing an additional guide frame, the connectors are enabled to float in any desired direction, thereby achieving effects of reducing an overall height and satisfying current thinning requirements.

Abstract: A method for measuring coordinate position include detecting the distance of a target relative to a portable electronic device to generate a measurement signal corresponding to the distance, sensing a relative position of the target to generate a azimuth angle corresponding to the relative position, detecting the movement of the portable electronic device to generate an inertial signal corresponding to the movement, obtaining positioning information of the portable electronic device, converting the measurement signal into distance data, converting the inertial signal into a tilt angle, calculating coordinate difference information with the tilt angle, the distance data and the azimuth angle, and calculating coordinate position of the target with the positioning information and the coordinate difference information.

Abstract: A portable keyboard structure includes a plastic substrate, multiple metal support plates, a plastic bottom cover and multiple buffer members. The plastic substrate has a mounting surface, the metal support plates are mounted on corners of the mounting surface, the plastic bottom cover is disposed corresponding to the mounting surface and in conjunction with the plastic substrate clamps and secures the metal support plates, and the buffer members are respectively configured corresponding to the metal support plates. Each buffer member includes a fixing portion and a protection portion, the fixing portion are respectively disposed at the corresponding metal support plates, and the protection portions respectively envelop corners of the plastic substrate. Thus, the weight of the keyboard structure is significantly reduced, the production cost is lowered, and certain structural strength and fall-resistance are maintained at the same time.

Abstract: A replacement device includes a replacement module and a slider. The replacement module includes a sliding portion. The sliding portion is provided with a limiting column, which is formed with a fixing hole. The slider includes a slider body. The slider body is provided with a first latch, a limiting hole and a fixing element, wherein the first latch is arranged on a first side edge of the slider body. The slider is correspondingly arranged on the sliding portion of the replacement module, and the limiting column of the sliding portion passes through the limiting hole. The fixing element has a top portion, and is fixed in the fixing hole. The size of the top portion is greater than the size of the limiting hole, so that the slider moves relative to the replacement module within a limit range of the limiting hole.

Abstract: A detecting circuit of an external display device includes a first connector, a display circuit configured to provide a display signal to the external display device through the first connector, a switch circuit, a power supply circuit configured to provide power needed for operating the display circuit through the switch circuit when the switch circuit is on, and a control circuit configured to turn on the switch circuit upon detecting the external display device so as to connect the power supply circuit to the display circuit. When the switch circuit is on, the control circuit accumulates a duration or a number of times of detection that the external display device is continually not detected, and then turns off the switch circuit to disconnect the power circuit from the display circuit when the duration reaches a time threshold or the number of times of detection reaches a count threshold.