Abstract: A high-gain and low-RCS (radar cross section) broadband circularly polarized metasurface antenna based on a novel sequential-rotation feeding network includes three layers of dielectric substrates and five metal layers as well as three resistors, which are from top to bottom: a first metal layer, a first dielectric substrate, a second metal layer, a second dielectric substrate, a third metal layer, a fourth metal layer, a third dielectric substrate and a fifth metal layer. The first three metal layers are all metasurface arrays composed of 10*10 metal patches; the fourth metal layer and the third metal layer define a resonant cavity by means of a distance therebetween; the fourth metal layer is provided with four slits having rotational symmetry; and the fifth metal layer is a hybrid feeding network composed of microstrip lines and including three equal power dividers and three resistors.

Abstract: A high-gain and low-RCS (radar cross section) broadband circularly polarized metasurface antenna based on a novel sequential-rotation feeding network includes three layers of dielectric substrates and five metal layers as well as three resistors, which are from top to bottom: a first metal layer, a first dielectric substrate, a second metal layer, a second dielectric substrate, a third metal layer, a fourth metal layer, a third dielectric substrate and a fifth metal layer. The first three metal layers are all metasurface arrays composed of 10*10 metal patches; the fourth metal layer and the third metal layer define a resonant cavity by means of a distance therebetween; the fourth metal layer is provided with four slits having rotational symmetry; and the fifth metal layer is a hybrid feeding network composed of microstrip lines and including three equal power dividers and three resistors.

Abstract: Disclosed herein is a near infra-red light emitting diode (LED) device comprising a first electrode, a second electrode and a near infra-red emitter module sandwiched between the first and second electrodes, wherein the first and second electrodes are transparent. Also disclosed herein is a near infra-red light emitting diode (LED) device comprising, a first electrode and a second electrode, a hole transport layer, an emission layer, and an electron transport layer, wherein the hole transport layer is formed from a polymeric material that has an ionisation potential of from 0 to ?5.30 eV.

Abstract: The present application relates to the field of bicycle manufacturing technology, and in particular to a bicycle and a crank assembly thereof, comprising a first handle and a second handle, wherein one of the handles is connected to a transmission shaft and the other of the handles is connected to a pedal, the first handle and the second handle are rotatably connected, and the axis of rotation coincides with the extending direction of the crank; and further comprising a locking mechanism, wherein the first handle is rotatable with respect to the second handle when the locking mechanism is in the first state, and the locking mechanism limits the relative rotation of the first handle and the second handle when the locking mechanism is in the second state.

Abstract: This application discloses a quick locking device for a bicycle front fork, a handlebar and a frame head tube. A plastic part head assembly is installed at the bottom of the handlebar; the frame head tube is arranged below the plastic part head assembly, and the top of the frame head tube passes through the plastic part head assembly to be fixedly connected with the handlebar; a first installing hole is formed in the side surface of one side of the frame head tube; a second installing hole is formed below the first installing hole; a bicycle front fork tube is fixedly arranged inside the frame head tube through a spring buckle; the bicycle front fork is installed at the bottom of the bicycle front fork tube.

Abstract: The present application relates to the field of bicycle manufacturing technology, and in particular to a bicycle and a crank assembly thereof, comprising a first handle and a second handle, wherein one of the handles is connected to a transmission shaft and the other of the handles is connected to a pedal, the first handle and the second handle are rotatably connected, and the axis of rotation coincides with the extending direction of the crank; and further comprising a locking mechanism, wherein the first handle is rotatable with respect to the second handle when the locking mechanism is in the first state, and the locking mechanism limits the relative rotation of the first handle and the second handle when the locking mechanism is in the second state.

Abstract: A service control method, a terminal, and a network device. The method includes measuring, by a terminal, a service status of interaction between the terminal and a network and/or a moving speed of the terminal, and reporting, by the terminal, measured service status information and/or speed information to a network device such that the network device configures a network parameter of the terminal according to the service status information and/or the speed information. Therefore, a network throughput is improved, and terminal energy consumption is reduced.

Abstract: This application discloses a quick locking device for a bicycle front fork, a handlebar and a frame head tube. A plastic part head assembly is installed at the bottom of the handlebar; the frame head tube is arranged below the plastic part head assembly, and the top of the frame head tube passes through the plastic part head assembly to be fixedly connected with the handlebar; a first installing hole is formed in the side surface of one side of the frame head tube; a second installing hole is formed below the first installing hole; a bicycle front fork tube is fixedly arranged inside the frame head tube through a spring buckle; the bicycle front fork is installed at the bottom of the bicycle front fork tube.

Abstract: A harvesting device and methods of harvesting (i.e., dewatering) algae are described. The harvesting device and methods involve the use of stimuli-sensitive hydrogels.

Abstract: A file synchronization method may include: receiving a file synchronization request from a sender device; sending a response message based on the request, wherein the response message includes a plurality of storage area addresses of a receiver device; receiving a plurality of file chunks that are sent by the sender device based on the response message, wherein the plurality of file chunks are obtained by chunking a to-be-transmitted file, and each of the plurality of file chunks includes a unique identifier and a storage area address, of the receiver device, corresponding to the unique identifier; and allocating each file chunk to a corresponding storage area according to the unique identifier of the file chunk and the storage area address, of the receiver device, corresponding to the unique identifier, and assembling, in real time, the plurality of file chunks that are stored in the storage areas, to obtain the to-be-transmitted file.

Abstract: A harvesting device and methods of harvesting (i.e., dewatering) algae are described. The harvesting device and methods involve the use of stimuli-sensitive hydrogels.

Abstract: A service control method, a terminal, and a network device. The method includes measuring, by a terminal, a service status of interaction between the terminal and a network and/or a moving speed of the terminal, and reporting, by the terminal, measured service status information and/or speed information to a network device such that the network device configures a network parameter of the terminal according to the service status information and/or the speed information. Therefore, a network throughput is improved, and terminal energy consumption is reduced.

Abstract: A service control method, a terminal, and a network device. The method includes measuring, by a terminal, a service status of interaction between the terminal and a network and/or a moving speed of the terminal; and reporting, by the terminal, measured service status information and/or speed information to a network device, so that the network device configures a network parameter of the terminal according to the service status information and/or the speed information. Therefore, a network throughput is improved, and terminal energy consumption is reduced.

Abstract: A service control method, a terminal, and a network device. The method includes measuring, by a terminal, a service status of interaction between the terminal and a network and/or a moving speed of the terminal; and reporting, by the terminal, measured service status information and/or speed information to a network device, so that the network device configures a network parameter of the terminal according to the service status information and/or the speed information. Therefore, a network throughput is improved, and terminal energy consumption is reduced.