Abstract: A plug-in module (100), has a first side face (110), a first elastic strip (10) and a first pull tab (20) provided at a same end of the first side face; the first elastic strip has an elongated shape, and is provided with at least one first limiting lug (11) on a first surface of the first elastic strip opposite to the first side face, an end of the first elastic strip located in close proximity to the first pull tab is referred to as an opposite end, another end of the first elastic strip is referred to as the distal end, and the distal end and the first side face are affixed together. The opposite end is provided with an elastic strip retraction head (12), and the elastic strip retraction head is provided in correspondence with the first pull tab. Further provided is a smartboard. The plug-in module can be conveniently plugged in and unplugged, simplifying user operations and improving user experience.

Abstract: A plug-in module (100), has a first side face (110), a first elastic strip (10) and a first pull tab (20) provided at a same end of the first side face; the first elastic strip has an elongated shape, and is provided with at least one first limiting lug (11) on a first surface of the first elastic strip opposite to the first side face, an end of the first elastic strip located in close proximity to the first pull tab is referred to as an opposite end, another end of the first elastic strip is referred to as the distal end, and the distal end and the first side face are affixed together. The opposite end is provided with an elastic strip retraction head (12), and the elastic strip retraction head is provided in correspondence with the first pull tab. Further provided is a smartboard. The plug-in module can be conveniently plugged in and unplugged, simplifying user operations and improving user experience.

Abstract: Disclosed is a character editing method for a screen display device. The method comprises: displaying original character information in a character editing area of a screen display device; receiving selection of a to-be-modified character in the original character information; acquiring a candidate replacement character corresponding to the to-be-modified character from a confusable character database; displaying the candidate replacement character in a recommended area of the screen display device; receiving selection of the candidate replacement character; and replacing the to-be-modified character in the original character information by using the selected candidate replacement character. The present application also provides a character editing device for a screen display device.

Abstract: A method and an apparatus for switching speech or audio signals, wherein the method for switching speech or audio signals includes when switching of a speech or audio, weighting a first high frequency band signal of a current frame of speech or audio signal and a second high frequency band signal of the previous M frame of speech or audio signals to obtain a processed first high frequency band signal, where M is greater than or equal to 1, and synthesizing the processed first high frequency band signal and a first low frequency band signal of the current frame of speech or audio signal into a wide frequency band signal. In this way, speech or audio signals with different bandwidths can be smoothly switched, thus improving the quality of audio signals received by a user.

Abstract: An intake and exhaust system of an internal combustion engine is disclosed. More particularly, the intake and exhaust system of the internal combustion engine supplies a suction flow enough to be proportional to engine load or a speed, dissipates a pulsating energy that is naturally generated during intake, and reduces an exhaust resistance caused by interference with the exhaust gas during exhaust, thereby allowing high-performance, high-power, low-vibration and economical fuel consumption ratio to be accomplished.