Abstract: The present application provides a photon-based CA authentication method, including: receiving, by a photon-based CA authentication terminal, an optical signal from a photon terminal, where the optical signal includes a user ID; verifying the user ID included in the optical signal; and providing, in response to successful user ID verification, a user certificate to a client to perform CA certificate authentication.

Abstract: The present disclosure discloses a photon data transmission method and device for a mobile terminal, where to-be-transmitted data is encoded by tuning a light luminance intensity combination so as to send more information and improve security. Preferably, before encoding, luminance of a flash is controlled and data of a specific information amount is sent, and a photonic receive end recognizes a light signal, and according to a recognition result, determines a maximum quantity of luminance levels of signals supported by the photonic receive end, and then performs encoding according to a recognition capability of the photonic receive end. In this way, it is ensured that the photonic receive end can recognize the signals, and that sent code can make full use of luminance of a flash of a mobile phone.

Abstract: The present disclosure provides an exhaust assembly for an aerostat, including a valve base (2) provided with a valve port (1), and a valve cover (3) that selectively covers the valve port (1), and further including: a motor driving mechanism and a transmission mechanism that are arranged on the valve base (2). The motor driving mechanism propels the transmission mechanism to drive the valve cover (3) to selectively cover the valve port (1). When the valve cover (3) is in a position where the valve port (1) is open, the valve cover (3) is arranged at an angle with respect to a plane at which the valve port (1) is located. A purpose of the present disclosure is to provide the exhaust assembly that is for an aerostat and whose exhausting pressure can be flexibly adjusted, and an aerostat provided with the exhaust assembly.

Abstract: Broadband metamaterial apparatus, methods, systems, and computer readable media are disclosed, as well as exemplary embodiments that provide cloaking, beam steering, and beam focusing. In one exemplary implementation, a broadband interface structure has a front surface region and a back surface region. The broadband interface structure is arranged to provide electromagnetic energy characteristic of an apparent profile of the back surface region substantially different than an actual profile of the back surface region for electromagnetic energy received at the front surface region.

Abstract: The present disclosure discloses a three-dimensional topographic mapping system and mapping method. The system includes: a floating platform, a detection apparatus, and a ground apparatus, where the floating platform is located in the stratosphere above a predetermined ground area that is to be mapped; the detection apparatus is arranged on the floating platform and configured to map the predetermined ground area according to mapping instruction information transmitted by the ground apparatus, and return mapping data to the ground apparatus; and the ground apparatus processes the returned mapping data to obtain DEM data. In the three-dimensional topographic mapping system according to embodiments of the present disclosure, the detection apparatus is arranged on the floating platform to map the predetermined ground area and cooperate with the ground apparatus to calculate the mapping data.

Abstract: The present disclosure discloses a fire disaster monitoring method and apparatus. The method includes: obtaining an infrared image that is obtained through photoshooting a to-be-monitored area by an infrared detection apparatus located on an aerostat, where different colors displayed in the infrared image correspond to different temperatures; determining, according to the colors displayed in the infrared image, whether a difference between temperatures corresponding to adjacent areas in the infrared image is greater than a predetermined threshold; and if it is determined that the difference between the temperatures corresponding to the adjacent areas is greater than the predetermined threshold, sending fire disaster alarm information to a receiving device, where the fire disaster alarm information is used to indicate that a fire disaster occurs in the to-be-monitored area.

Abstract: Complementary metamaterial elements provide an effective permittivity and/or permeability for surface structures and/or waveguide structures. The complementary metamaterial resonant elements may include Babinet complements of “split ring resonator” (SRR) and “electric LC” (ELC) metamaterial elements. In some approaches, the complementary metamaterial elements are embedded in the bounding surfaces of planar waveguides, e.g. to implement waveguide based gradient index lenses for beam steering/focusing devices, antenna array feed structures, etc.

Abstract: An artificial microstructure used in artificial electromagnetic material includes a first line segment and a second line segment. The second line segment is perpendicular to the first line segment. The first line segment and the second line segment intersect with each other to form a cross-type structure. The present disclosure further relates to an artificial electromagnetic material using the artificial microstructure.

Abstract: The present application relates to an optical signal receiving apparatus, including a housing for accommodating a body inside the housing, where the body is provided with an optical receiver for receiving an external optical signal, and an optical-to-electrical conversion device is arranged at a central position of the optical receiver. The optical signal receiving apparatus is further provided with a lamp cup for reflecting the external optical signal to the optical-to-electrical conversion device, a light ring for indicating a light incident region, a pry-proof circuit arranged on the body, a power control circuit, and a keying circuit. The optical signal receiving apparatus of the present application can improve user experience.

Abstract: The present application relates to a self-adaptive receiving method, device, and system for a wireless signal, where the receiving method is characterized by: detecting an electric signal, and recording and storing a duration of each level of the electric signal; determining a decision time interval according to the duration of each level, where the decision time interval is used to determine a location of the spacing level between the electric signal groups of the electric signal; comparing the duration of each level with the decision time interval to recognize each electric signal group; when the duration of the level is less than the decision time interval, determining the level as the intragroup time interval and recording the data of the electric signal groups; and when the duration of the level is greater than or equal to the decision time interval, determining the level as the intergroup time interval and confirming an end of the electric signal groups.

Abstract: The disclosure discloses a wide-frequency wave-absorbing metamaterial, which comprises a plurality of layers of substrates and microstructures respectively arranged on the substrates at different layers. The wave-absorbing frequency band of the wide-frequency wave-absorbing metamaterial is relatively wide. The disclosure further discloses an electronic device and a method for obtaining a wide-frequency wave-absorbing metamaterial. By using the foregoing manner, the disclosure can enable a wave-absorbing metamaterial to significantly increase a wave-absorbing bandwidth based on a relatively good electromagnetic wave absorbing effect.

Abstract: The disclosure relates to an antenna reflector phase correction film and a reflector antenna. The antenna reflector phase correction film includes a first substrate, a second substrate, and multiple artificial microstructures disposed between the first substrate and the second substrate, the artificial microstructures are wires made of electrically conductive materials, and an electromagnetic wave, emergent after being reflected by an antenna reflector attached with the antenna reflector phase correction film, has an equiphase surface. According to the disclosure, the antenna reflector phase correction film has specific refractive index distribution internally, so that a surface emergent phase of a reflector can be corrected after attaching onto a surface of a conventional reflector, a phase error caused due to installation or processing is improved, a complete flat emergent equiphase is obtained, and then a far-field performance (such as a higher gain) is improved.

Abstract: The present application relates to an optical communication transmitting apparatus and receiving apparatus. The optical communication transmitting apparatus includes: an encoder, configured to encode and shunt an input signal, to generate multiple synchronous encoded signals; a driver, configured to amplify the multiple encoded signals, to generate multiple drive signals; and multiple light sources, configured to generate multiple synchronous optical signals when driven by the multiple drive signals. The optical communication transmitting apparatus and receiving apparatus provided in the present application make full use of advantages of visible light communication, achieving a rapid communication speed and high security.

Abstract: The present invention provides an artificial electromagnetic material, comprising at least one material sheet layer; wherein each material sheet layer is provided with a first substrate and a second substrate which are oppositely arranged; and a plurality of artificial microstructures are attached on a surface, facing the second substrate, of the first substrate. The first substrate and the second substrate on both sides of the artificial microstructure are in such tight contact therewith that the number of electric field lines passing through the substrates is increased and the equivalent permittivity of the artificial electromagnetic material is effectively improved.

Abstract: The present invention discloses a visible light signal transmitting and receiving processing method, a transmitting terminal, a receiving terminal, and a system. The method includes: performing, by a transmitting terminal, an operation between data to be sent and a pseudocode signal of the transmitting terminal to output a scrambled code signal; combining, by the transmitting terminal, the scrambled code signal with a light guide signal to obtain a signal to be sent, where the light guide signal includes identity information of the transmitting terminal; and transmitting, by the transmitting terminal, the signal to be sent in light form. The present invention solves a problem that an encryption method for visible light communication in a related art is applicable to only one transmitting terminal, and thereby multiple transmitting terminals can be supported.

Abstract: The disclosure relates to a harmonic oscillator and a preparation method thereof, a filtering device and an electromagnetic wave device. The harmonic oscillator includes at least one dielectric slab and response units attached on one surface of the at least one dielectric slab, where the response units are structures manufactured by conductive material and provided with geometric patterns. According to the technical solution of the disclosure, the filtering device and the electromagnetic wave device with the harmonic oscillator are good in structure stability. Swinging of a harmonic oscillator sheet layer is low in loss. The Q value of the harmonic oscillator prepared by the disclosure is high; and loss of a resonant cavity, the filtering device and a microwave device with the harmonic oscillator is obviously reduced.

Abstract: A method of pumping an optical resonator includes directing light generated by a pumping light at the optical resonator, exciting a propagating surface state of the optical resonator at an interface of the optical resonator, and changing a propagating frequency of the light proximate the interface, where the changed frequency corresponds to a propagation frequency of the surface state. The optical resonator includes a photonic crystal and a material, where the interface is formed between the photonic crystal and the material.

Abstract: The present application relates to multi-stage amplitude modulation-based methods, apparatuses, and systems for coding and decoding a visible light signal. The coding method includes the following steps: dividing to-be-transmitted information into multiple information units, where each information unit includes multiple bits; converting the multiple information units into multiple electrical signal units indicated by at least three levels, where an interval indicated by a first level in the at least three levels exists between adjacent electrical signal units, and each electrical signal unit uses a combination of other levels in the at least three levels to represent the multiple bits of a corresponding information unit; combining the electrical signal units to obtain a coded electrical signal; and transmitting the coded electrical signal in a visible light signal form.

Abstract: The present invention discloses a light signal-based information processing method and device. The method includes: receiving trigger information; extracting corresponding information according to the trigger information; sending the extracted information in a form of a visible light signal, or receiving a visible light signal; obtaining modification of user information and user information according to the visible light signal; and modifying stored user list information according to the modification of user information and the user information, so that an authorization information list of a light signal receiving device can be modified conveniently no matter whether the light signal receiving device is fixed in a specific system.

Abstract: Complementary metamaterial elements provide an effective permittivity and/or permeability for surface structures and/or waveguide structures. The complementary metamaterial resonant elements may include Babinet complements of “split ring resonator” (SRR) and “electric LC” (ELC) metamaterial elements. In some approaches, the complementary metamaterial elements are embedded in the bounding surfaces of planar waveguides, e.g. to implement waveguide based gradient index lenses for beam steering/focusing devices, antenna array feed structures, etc.