Abstract: The present invention discloses a method for preparing a PET/PTT parallel complex filament with high self-crimpiness, wherein PET and PTT are sliced, dried and crystallized, and then fused separately and subjected to extrusion molding through a parallel-type spinneret plate; oil is applied after cooling; then level 1-3 drafting and heat setting treatment are adopted; and during drafting, a total drafting rate is controlled to be 3 to 3.5, wherein the level-1 drafting rate is 2.8 to 3.0 at a temperature controlled to be 75 to 80° C., according to the method for preparing the PET/PTT parallel complex filament with high self-crimpiness, methods like multi-level drafting for increasing the drafting rate are adopted, and the effects of improving the fiber strength, moderately lowering the breaking elongation, and greatly improving the self-crimpiness are achieved.

Abstract: A Bluetooth communication system, including first and second Bluetooth devices. The second device includes a second Bluetooth application and a second Bluetooth host. The first device sends advertising information that includes UUID information of a service supported by the first device; the second host receives the advertising information, the advertising information includes the UUID information of the service supported by the first device; the second host stores and parses the UUID information, and sends a pairing request to the first device; the first device pairs with the second device; the second device instructs the second host to report pairing to the second application, the pairing information including UUID information of the service supported by the first device; the second Bluetooth device sends a service connection request to the first device; and the first device is further configured to establish a service connection to the second device.

Abstract: The present disclosure discloses an air moisture collection device and method. The air moisture collection device comprises a shell, a condensing device, a water outlet pipe and a base, wherein the bottom of the shell is connected with the top of the base, an inner container is arranged in the shell, a water collecting bottle is arranged in the base, the bottom of the inner container communicates with the water collecting bottle through the water outlet pipe, and the water outlet pipe is provided with a water outlet pipe sealing valve; the condensing device is arranged between the shell and the inner container; an air inlet pipe, an exhaust pipe, a control device and an energy device are arranged on the side wall of the shell; and the control device and the energy device are both connected with the condensing device.

Abstract: This application provides a service connection establishment method, a Bluetooth master device, and a chip. After scanning a device combination including at least two Bluetooth slave devices, the Bluetooth master device, if required to establish a service connection with each of Bluetooth slave devices in the device combination, needs to do as follows: in a pairing phase, the Bluetooth master device automatically pairs with another Bluetooth slave device in the device combination after completing pairing with one Bluetooth slave device in the device combination; in a service connection establishment phase, similarly, the Bluetooth master device automatically establishes a service connection with another Bluetooth slave device in the device combination after establishing a service connection with one Bluetooth slave device in the device combination. This is a simple process, and a speed of service connection establishment is high.

Abstract: A Bluetooth communication system, including first and second Bluetooth devices. The second device includes a second Bluetooth application and a second Bluetooth host. The first device sends advertising information that includes UUID information of a service supported by the first device; the second host receives the advertising information, the advertising information includes the UUID information of the service supported by the first device; the second host stores and parses the UUID information, and sends a pairing request to the first device; the first device pairs with the second device; the second device instructs the second host to report pairing to the second application, the pairing information including UUID information of the service supported by the first device; the second Bluetooth device sends a service connection request to the first device; and the first device is further configured to establish a service connection to the second device.

Abstract: A method, a device, and a system for managing permission information are provided. The method includes: receiving a permission modification instruction, where the permission modification instruction is used to instruct modification of permission information of a file; modifying the permission information according to the permission modification instruction of the file; and sending an Identifier (ID) of the file and the modified permission information to a server. The device includes: a modification module, a processing module, and a first sending module. The system includes: a client and a server. The server and the file jointly store the permission information, thereby effectively improving the flexibility of file encryption, reducing the burden of the server, and improving the performance of the server.