Abstract: A method and device of removing and recycling metals from a mixing acid solution, includes adsorbing a mixing acid solution with a pH value of ?1 to 4 and a cobalt ion concentration of 100 to 1,000 mg/L by at least two cation resins in series setting to the cobalt ion concentration in the mixing acid solution is less than 10 mg/L, and then adjusting the pH value of the mixing acid solution after adsorption to meet a discharge standard, wherein the particle size of the at least two cation resins in series setting is 150˜1,200 ?m. After the cation resins are saturated by adsorption, regenerating the cation resins by sulfuric acid to form a cobalt sulfate solution, and then electrolytically treating the cobalt sulfate solution to obtain electrolytic cobalt and sulfuric acid electrolyte. The operation process is simple without complicated equipment, and it can effectively recycle metals from mixing acid solutions.

Abstract: An authorization system of a navigation device includes a first identification (ID) module and a second ID module. The first ID module is arranged to perform authorization for a first portion of the navigation device, and the second ID module is arranged to perform authorization for a second portion of the navigation device. The first and the second ID modules perform bidirectional authorization of the first and the second portions, and further determine behavior of the navigation device according to a result of the bidirectional authorization. An associated authorization method for controlling the navigation device is further provided.

Abstract: The invention provides a method for performing track-seeking in an optical disk drive. In one embodiment, the optical disk drive is about to perform a series of operations comprising a plurality of prior operations and a track-seeking operation, and the track-seeking operation is divided into a pre-seek procedure and a true-seek procedure. First, a microprocessor of the optical disk drive performs the prior operations. Whether the microprocessor is unoccupied is then detected before performing the prior operations is completed. When the microprocessor is detected to be unoccupied, the microprocessor performs the pre-seek procedure. The true-seek procedure is then performed according to results of the pre-seek procedure to move the pick-up head to a destination address of an optical disk.

Abstract: An authorization system of a navigation device includes a first identification (ID) module and a second ID module. The first ID module is arranged to perform authorization for a first portion of the navigation device, and the second ID module is arranged to perform authorization for a second portion of the navigation device. The first and the second ID modules perform bidirectional authorization of the first and the second portions, and further determine behavior of the navigation device according to a result of the bidirectional authorization. An associated authorization method for controlling the navigation device is further provided.

Abstract: A method of managing a firmware includes configuring the firmware to include at least a first firmware portion with a plurality of program codes, and a second firmware portion with a plurality of parameters separately; and storing the first firmware portion and the second firmware portion in a first storage area and a second storage area of a first storage module, respectively.

Abstract: A system for relocating code. A first memory stores a plurality of original code modules. A second memory stores a copied code module duplicated from one of the original code modules. A microprocessor retrieves and executes the retrieved code modules. A retrieval controller directs the retrieve operation of the microprocessor according to a preset rule. The microprocessor also executes basic operations, and determines whether media and corresponding operational firmware are present therein. An interface receives data comprising operational firmware from a host when media is present without corresponding operational firmware. The second memory also stores the received operational firmware, which directs the processor to operate.