Abstract: A dental appliance system comprises: a set of dental appliances for progressively closing a tooth gap between a group of posterior teeth and an intermediate tooth in a patient's dentition, wherein the intermediate tooth is adjacent to the tooth gap and between the tooth gap and a group of anterior teeth in the patient's dentition; and wherein the set of dental appliances comprises: a first plurality of dental appliances for implementing anchorage preparation for the group of posterior teeth and performing one or both of moving the intermediate tooth distally and treating the group of anterior teeth; and a second plurality of dental appliances for mesially moving the group of posterior teeth after the anchorage preparation for the group of posterior teeth has been implemented by the first plurality of dental appliances.

Abstract: The present application discloses a method for calibrating a parameter error of an electron probe microanalysis instrument. A one-dimensional grating standard template is prepared based on atom lithography technology. A theoretical grating period D of the one-dimensional grating standard template is calculated. The one-dimensional grating standard template is statically placed on a stage of the electron probe microanalysis instrument. The electron probe microanalysis instrument scans the one-dimensional grating standard template on the stage, performs image acquisition and measurement on a grid distance of the one-dimensional grating standard template to obtain a grating scanning distance measurement value L, and records a magnification ratio at this time. A calibration factor K under the magnification ratio is calculated according to D and L.

Abstract: A system for precision displacement measurement based on a self-traceable grating interference includes a coherent light source, a photoelectric detection module, a self-traceable grating and a signal processing module. The self-traceable grating is arranged on a to-be-measured displacement motion platform. The coherent light source, the photoelectric detection module and the signal processing module are sequentially connected. Laser generated by the coherent light source propagates through the photoelectric detection module and is incident on the self-traceable grating, diffracts with the self-traceable grating, returns to the photoelectric detection module to continue propagating and enters the signal processing module. The signal processing module collects an interference signal to obtain a motion displacement and a motion direction.

Abstract: A system for precision displacement measurement based on a self-traceable grating interference includes a coherent light source, a photoelectric detection module, a self-traceable grating and a signal processing module. The self-traceable grating is arranged on a to-be-measured displacement motion platform. The coherent light source, the photoelectric detection module and the signal processing module are sequentially connected. Laser generated by the coherent light source propagates through the photoelectric detection module and is incident on the self-traceable grating, diffracts with the self-traceable grating, returns to the photoelectric detection module to continue propagating and enters the signal processing module. The signal processing module collects an interference signal to obtain a motion displacement and a motion direction.

Abstract: A method for manufacturing grating reference materials having a self-traceability includes: acquiring a mask substrate including a window region and a non-window region; fabricating, a self-traceability mask on the mask substrate by using a laser-focused atomic deposition technique; acquiring a photoresist sample including an extreme ultraviolet photoresist and a second substrate; exposing the extreme ultraviolet photoresist by combining the self-traceability mask with the soft x-ray interference lithography, and then performing a development process after exposing to obtain a photoresist grating structure; and transferring the photoresist grating structure to the second substrate to obtain the grating reference materials.

Abstract: The invention discloses a toll road network traffic information collection and guidance system based on a route identification system, comprising toll road exit and entry toll lane systems, a networked toll center system, a 5.8 G route identification station, a 5.8 G route identification station monitoring system, a dual-frequency pass card for MTC vehicles, an OBU and a non-cash payment card for ETC vehicles, an in-vehicle multimedia terminal and a traffic information processing system. Collection of route identification, traffic information and vehicle driving state information, and traffic information pushing are implemented using the 5.8 GHz route identification station, the dual-frequency pass card and OBU containing a Bluetooth module and an OBU, and the in-vehicle multimedia terminal; processing and predication of information such as travel time, traffic flow, travel velocity, traffic state, and vehicle location on toll road sections are implemented using a method of combining cloud computing with 5.

Abstract: A wireless communication device is described. The wireless communication device includes a transmit/receive (T/R) switch that is configured with an antenna port coupled to an antenna, a transmitter port coupled to a transmitter and a receiver port coupled to a receiver. The T/R switch selectively connects the transmitter port to the antenna port or the receiver port to the antenna port. The wireless communication device also includes a T/R switch controller that sets the T/R switch to disconnect the transmitter from the antenna when the transmitter is actively transmitting in a high insertion loss mode to reduce power from the transmitter to the antenna.

Abstract: A wireless communication device is described. The wireless communication device includes a transmit/receive (T/R) switch that is configured with an antenna port coupled to an antenna, a transmitter port coupled to a transmitter and a receiver port coupled to a receiver. The T/R switch selectively connects the transmitter port to the antenna port or the receiver port to the antenna port. The wireless communication device also includes a T/R switch controller that sets the T/R switch to disconnect the transmitter from the antenna when the transmitter is actively transmitting in a high insertion loss mode to reduce power from the transmitter to the antenna.

Abstract: A method for communications is described. The method includes determining a symbol timing drift elimination amount for a received signal. The method further includes eliminating part of the symbol timing drift by adjusting a reference clock for the modem. Determining the symbol timing drift elimination amount may be based on at least one of a symbol timing drift estimate, a symbol timing error, a packet acquisition indicator, a packet validity indicator, demodulated bits or a carrier presence indicator.

Abstract: A method for communications is described. The method includes determining a symbol timing drift elimination amount for a received signal. The method further includes eliminating part of the symbol timing drift by adjusting a reference clock for the modem. Determining the symbol timing drift elimination amount may be based on at least one of a symbol timing drift estimate, a symbol timing error, a packet acquisition indicator, a packet validity indicator, demodulated bits or a carrier presence indicator.

Abstract: A panel which may be fastened to a side, top or bottom of or formed integrally with a computer case comprising a body member defining an outwardly facing surface and an inwardly facing surface, wherein the body member is provided with at least one conglomerate of apertures, and an area defined by a perimeter of the conglomerate of apertures is at least substantially 50% of the area of the body member.