Abstract: Provided herein is a pleuromutilin derivative containing a cycloalkyl group and preparation method and application thereof. Specifically, the pleuromutilin is reacted with p-toluenesulfonyl chloride to obtain an intermediate I, and the intermediate I is reacted with 1-amino-2-methylpropane-2-thiol hydrochloride to obtain an intermediate II, and then the intermediate II is reacted with cycloalkylcarbonyl chloride to obtain a target derivative. The synthesis process of these derivatives is simple, with a high yield and simple purification. These derivatives can effectively inhibit activities of Staphylococcus aureus and Streptococcus, and have superior activities to the marketed Tiamulin, and they also have good antibacterial activities against drug-resistant bacteria. In particular, the treatment effect of the derivative 2 of the target derivative is significantly superior to the clinical drugs Tiamulin and Valnemulin.

Abstract: The application provides a wind power generation system. The application discloses one or several set of power generation units, which generate power by driving the power generation units through the airflow generated by the natural environment or the carrier device, and then the control module outputs the power to the power storage device, and then supplies power to each power-consuming equipment by the diverter connected to the power output terminal of the power storage device, respectively. The internal structure of a turbofan blade of this application has a cavity for repeated impact of airflow, which can utilize a single inlet air to generate several drives to the blades, so that tiny wind can provide more stable power supply for various power-consuming facilities, and the power generation system of this application is less affected by external environmental factors.

Abstract: The application provides a wind power generation system. The application discloses one or several set of power generation units, which generate power by driving the power generation units through the airflow generated by the natural environment or the carrier device, and then the control module outputs the power to the power storage device, and then supplies power to each power-consuming equipment by the diverter connected to the power output terminal of the power storage device, respectively. The internal structure of a turbofan blade of this application has a cavity for repeated impact of airflow, which can utilize a single inlet air to generate several drives to the blades, so that tiny wind can provide more stable power supply for various power-consuming facilities, and the power generation system of this application is less affected by external environmental factors.

Abstract: Provided is a road-rail dual purpose quick disassembly and assembly type rail grinding maintenance robot, including a left robot grinding unit, a right robot grinding unit and quick unit connecting devices. The two robot grinding units are fixedly connected to the left and right sides of the quick unit connecting devices by the quick unit connecting devices so as to achieve quick assembly and disassembly of the robot. Each of the robot grinding units includes a robot grinding device, a rail walking device, road walking devices, a frame, a shell component and an electric control component. The robot grinding device is fixedly installed on the inner side of the upper part of the frame. The rail walking device and the road walking devices are fixedly installed at the bottom of the frame. The degree of intelligent and flexible of rail grinding operation can be significantly improved.

Abstract: The present invention discloses a crystal form, a preparation method and an application of a 4?-substituted nucleoside compound I having the following structure, including salts, prodrugs, and compositions thereof. Animal pharmacokinetic studies demonstrated that the effective drug concentrations of Compound Ia and Compound Ig in HIV target cells, peripheral blood mononuclear cells (PBMC), were effective in inhibiting HIV replication after 7 and 5 days, respectively. Therefore, Compound I can be used as a long-acting drug for preventing and treating AIDS. R is selected from ethynyl, azide, and cyano groups, X is selected from hydrogen and fluorine, and B is selected from B1 and B2.

Abstract: The present invention discloses an opposite belt-type precise seeding device. The opposite belt-type precise seeding device comprises a seed metering tube consisting of a U-shaped shell and a cover plate, two conveying devices provided inside the seed metering tube in parallel, and a conveying plate provided at the lower end of the seed metering tube. The opposite belt-type precise seeding device belongs to the field of agricultural machinery. In a seeder, a tubular seed conveying tube is usually used for guiding movement of seeds, but the movement of the seeds in the seed conveying tube has certain randomness, so that the seed distance consistency of the seeds in a seed bed is reduced. Through control of the seeds by the conveying devices, the stable movement of the seeds is achieved and the seed distance consistency of the seeds in the seed bed is guaranteed.

Abstract: A 2-(2,4,5-substituted phenylamino) pyrimidine derivative, having the following chemical formula I:

Abstract: The present invention discloses an opposite belt-type precise seeding device. The opposite belt-type precise seeding device comprises a seed metering tube consisting of a U-shaped shell and a cover plate, two conveying devices provided inside the seed metering tube in parallel, and a conveying plate provided at the lower end of the seed metering tube. The opposite belt-type precise seeding device belongs to the field of agricultural machinery. In a seeder, a tubular seed conveying tube is usually used for guiding movement of seeds, but the movement of the seeds in the seed conveying tube has certain randomness, so that the seed distance consistency of the seeds in a seed bed is reduced. Through control of the seeds by the conveying devices, the stable movement of the seeds is achieved and the seed distance consistency of the seeds in the seed bed is guaranteed.

Abstract: Disclosed is a method for processing a SOCKET, a method and an apparatus for transmitting packet data, wherein, the method for processing a SOCKET comprises: a connection management application obtaining a SOCKET identifier corresponding to each service application, and transmitting the SOCKET identifier and a modification instruction to a TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack; the TCP/IP protocol stack searching for SOCKET file description information corresponding to the SOCKET identifier, and modifying the SOCKET file description information according to the modification instruction. After adopting the technical solution mentioned above, the IP binding operation across applications can be performed on a single-process or multi-process operating system, and the application level traffic selection of the different data connection can be performed according to intention of a user.

Abstract: Provided are a method and system for a terminal accessing to a wireless local area network, and a terminal thereof, wherein the method includes: a terminal which does not know a wireless local area network access key sending a key acquisition request to a shared server in the wireless local area network, wherein the request carries a terminal location and a service set identifier (SSID); the shared server in the wireless local area network selecting an access key based on a correspondence relationship between the terminal location, the SSID and the access key, and sending the selected access key to the terminal; the terminal accessing to the wireless local area network according to the access key. The embodiment of the present document enables the terminal efficiently and conveniently access to a wireless local area network.

Abstract: Provided are a method and system for a terminal accessing to a wireless local area network, and a terminal thereof, wherein the method includes: a terminal which does not know a wireless local area network access key sending a key acquisition request to a shared server in the wireless local area network, wherein the request carries a terminal location and a service set identifier (SSID); the shared server in the wireless local area network selecting an access key based on a correspondence relationship between the terminal location, the SSID and the access key, and sending the selected access key to the terminal; the terminal accessing to the wireless local area network according to the access key. The embodiment of the present document enables the terminal efficiently and conveniently access to a wireless local area network.

Abstract: Disclosed is a method for processing a SOCKET, a method and an apparatus for transmitting packet data, wherein, the method for processing a SOCKET comprises: a connection management application obtaining a SOCKET identifier corresponding to each service application, and transmitting the SOCKET identifier and a modification instruction to a TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack; the TCP/IP protocol stack searching for SOCKET file description information corresponding to the SOCKET identifier, and modifying the SOCKET file description information according to the modification instruction. After adopting the technical solution mentioned above, the IP binding operation across applications can be performed on a single-process or multi-process operating system, and the application level traffic selection of the different data connection can be performed according to intention of a user.

Abstract: A method for bearer control, bearer deletion, data distribution, and multicast broadcast service MBS modification are described, which enables MBS data to be received successfully and MBS sessions to be managed effectively. According to the invention involved in a communication field, service distribution information for one MBS service is maintained within MBS upstream and downstream nodes, and the MBS service distribution information is composed of a list of downstream nodes corresponding to the respective nodes. A corresponding service bearer and data distribution relation of the MBS are established and maintained based on the service distribution information, and service data of the MBS is distributed based on the service bearer and the data distribution relation.

Abstract: A locating method is provided. The serving ASN-GW sends locating measurement information to a WiMAX terminal; the WiMAX terminal measures the locating data, and sends the locating data measurement result to the entity capable of calculating locating information; and the entity capable of calculating locating information calculates the locating information according to the locating data measurement result. A locating system, a locating data measurement entity, an LCF, and a calculation entity are also disclosed herein. The provided method, system and entity may provide a Locating Service (LCS) for the users in a WiMAX network.

Abstract: A method for bearer control, bearer deletion, data distribution, and multicast broadcast service MBS modification are described, which enables MBS data to be received successfully and MBS sessions to be managed effectively. According to the invention involved in a communication field, service distribution information for one MBS service is maintained within MBS upstream and downstream nodes, and the MBS service distribution information is composed of a list of downstream nodes corresponding to the respective nodes. A corresponding service bearer and data distribution relation of the MBS are established and maintained based on the service distribution information, and service data of the MBS is distributed based on the service bearer and the data distribution relation.