Abstract: A physiological value sensing device and a sensing method thereof are provided. The physiological value sensing device comprises an input module and a computing module. The input module is used to provide a multi-band light to illuminate a testee to generate a plurality of optical signals, and the optical signals include a plurality of interference signals and a physiological target signal. The computing module is used to establish a physiological normal model. The physiological normal model has multiple physiological sample values corresponding to the multi-band light. The computing module converts the interference signals and the physiological target signal into the physiological normal model for fitting. A physiological target value corresponding to the physiological target signal is generated after eliminating the interference signals based on the physiological sample values.

Abstract: A display method and a smart display device for collectively changing display contents of a shell body of a transportation vehicle are provided, including setting first display contents of the display element for normal display; setting second display contents of the display element being different from the first display contents; obtaining positioned locations of a plurality of the transportation vehicles by a central control system. When any transportation vehicle satisfies a predetermined condition, the central control system issues the display control signal to the transportation vehicle according to the positioned location, and the smart display device of the transportation vehicle automatically receives the display control signal for the display element to change the first display contents to the second display contents, so that one or more of the transportation vehicles can collectively change the display contents.

Abstract: A speaker device with a processing unit and a storage device for controlling the operation of the speaker device also has a speaker unit and a connection module. The processing unit adjusts the speaker unit to operate in a first sound mode based on the first frequency characteristic of the speaker unit, and detects whether the connection module is communicatively coupled with a sound device having a second frequency characteristic. The processing unit switches the speaker unit from the first sound mode into a second sound mode based on the comparison between the first frequency characteristic and the second frequency characteristic.

Abstract: A speaker device with a processing unit and a storage device for controlling the operation of the speaker device also has a speaker unit and a connection module. The processing unit adjusts the speaker unit to operate in a first sound mode based on the first frequency characteristic of the speaker unit, and detects whether the connection module is communicatively coupled with a sound device having a second frequency characteristic. The processing unit switches the speaker unit from the first sound mode into a second sound mode based on the comparison between the first frequency characteristic and the second frequency characteristic.