Abstract: A method for automatically adapting to a Wi-Fi network with hidden service set identifier (SSID) is provided. The method includes a wireless access point (AP) hiding an SSID of the wireless AP and receiving a probe request frame containing request information for automatically adapting to a Wi-Fi network of the wireless AP within coverage of the wireless AP. The method also includes the wireless AP determining whether the probe request frame contains the request information for automatically adapting to the Wi-Fi network of the wireless AP and the wireless AP sending a probe response frame when the probe request frame contains the request information for automatically adapting to the Wi-Fi network of the wireless AP. Further, the method includes the wireless AP receiving a connection request sent by at least one Wi-Fi terminal, such that the at least one Wi-Fi terminal is connected to the Wi-Fi network wirelessly.

Abstract: Methods and systems for multiple Wireless Fidelity (Wi-Fi) devices automatically connecting to a specified access point (AP) are provided. The method includes defining an encryption field in a beacon frame. The encryption field contains connection information of the specified AP defined by a vendor and each of the multiple Wi-Fi devices is from the same vendor. The method also includes assigning respectively a key that decrypts the connection information of the specified AP contained in the encryption field to each Wi-Fi device, and broadcasting the connection information of the specified AP contained in the encryption field of the beacon frame by any AP containing the encryption field. Further, the method includes decrypting the connection information of the specified AP contained in the encryption field of the beacon frame by the multiple Wi-Fi devices having the key, such that the multiple Wi-Fi devices are connected to the specified AP.

Abstract: A cylinder linkage method for a multi-cylinder internal-combustion engine comprising connecting piston rods (27) and pistons (28) of four or more linkage combustion and compression reversible cylinder blocks (14A, 14B, 14C, 14D, 30A, 30B, 30C, 30D) and of reversible precompression cylinder blocks (3, 8) simultaneously by one linkage rod (26), such that the linkage rod (26) is able to drive the linkage pistons (28) to move in the same direction simultaneously and to arrive at a top dead center or a bottom dead center or any same stroke position between the two dead centers of all the linkage cylinder blocks simultaneously. The cylinder linkage method for a multi-cylinder internal-combustion engine can be used to manufacture a multi-cylinder linkage compound internal-combustion engine, and further used to manufacture internal-combustion engines such as gasoline internal-combustion engine, diesel internal-combustion engine, natural gas internal-combustion engine etc.

Abstract: A cylinder linkage method for a multi-cylinder internal-combustion engine comprising connecting piston rods (27) and pistons (28) of four or more linkage combustion and compression reversible cylinder blocks (14A, 14B, 14C, 14D, 30A, 30B, 30C, 30D) and of reversible precompression cylinder blocks (3, 8) simultaneously by one linkage rod (26), such that the linkage rod (26) is able to drive the linkage pistons (28) to move in the same direction simultaneously and to arrive at a top dead center or a bottom dead center or any same stroke position between the two dead centers of all the linkage cylinder blocks simultaneously. The cylinder linkage method for a multi-cylinder internal-combustion engine can be used to manufacture a multi-cylinder linkage compound internal-combustion engine, and further used to manufacture internal-combustion engines such as gasoline internal-combustion engine, diesel internal-combustion engine, natural gas internal-combustion engine etc.