Abstract: An electronic device for converting a multi-channel audio file to a dual channel audio file and vice versa. The multichannel audio file includes a right channel group and a left channel group of channel signals. The electronic device respectively mixes the channel signals of the right channel group and the left channel group according to a mixed matrix to form N mixed signals, and cross embeds the N mixed signals to from a left channel audio signal and a right channel audio signal to compose the dual channel audio file. The electronic device samples, recombines and decodes the left channel audio signal and the right channel audio signal according to a decoding matrix, which is the inverse of the mixed matrix, to revert to the original multi-channel audio file.

Abstract: A screw counter includes a first interface, a second interface, and a processing unit. The first interface connected to a screwdriver, the screwdriver is adapted for screwing a predetermined total number of screws into a workpiece to perform a screwing operation on the workpiece. The second interface is connected to a detecting unit. The detecting unit detects a start time and a finish time of the screwing operation. The processing unit counts a variable, each time when the processing unit is changed from a first state to a second state, the variable adds one; a total added value of the variable is calculated during a time interval between the start time and the finish time to acquire a total number of screws which are completely screwed into the workpiece.

Abstract: A test circuit for testing a flexible printed board (FPC) is provided, the test circuit includes a parameter preset module, a comparison module, and a prompt module. The parameter preset module is used to preset a parameter range indicating the suitable range of the resistance value of the FPC, and is further configured to connect to the FPC and convert the resistance value of the FPC to a related parameter. The comparison module compares the related parameter with the parameter range preset by the parameter preset module, and produces a comparison result. The prompt module produces a corresponding prompt signal according to the comparison result.

Abstract: A switching device includes a plurality of first interfaces respectively coupled to a plurality of computers, a third interface coupled to a display module, and a switching unit coupled to the first interfaces and the third interface. The switching unit is used for selecting one of the first interfaces to be coupled to the third interface in response to a command. The display module receives a video signal from a selected one of the computers through the selected first interface and the third interface, and displays video information.

Abstract: The claimed subject matter provides a system and/or a method that facilitates rendering a portion of an image from a server on a client. A portion of an image can be hosted by a server. A client can utilize a device to interact with the portion of an image via a network. The client can established two or more TCP/IP connections with the server in order to interact with the portion of the image. A pipe component can enforce an isolated pipeline and a processing thread for each of a user manipulation of the portion of the image, a transmission of a user request to manipulate the portion of the image via the network, a rendering of the portion of the image on the server, a compression of the portion of the image on the server, a transmission of the compressed portion of the image via the network, a decompression of the portion of the image on the client, and a display of the portion of the image on the client.

Abstract: The invention provides reagents and methods for preparing mammalian mesenchymal-derived neural stem cells, especially autologous mesenchymal-derived neural stem cells, compositions thereof, and methods for using and administering the cells in a patient in need thereof.