Abstract: A terahertz graphene Josephson junction detection system based on readout of a microwave resonant circuit includes a graphene Josephson junction detector, a microwave resonant readout circuit, and a microwave network analyzer. The graphene Josephson junction detector and the microwave resonant readout circuit form a microwave resonant circuit. A terahertz signal causes a change of an equivalent microwave inductance of the graphene Josephson junction detector, such that a resonant frequency and a quality factor of the microwave resonant circuit are changed. The present disclosure monitors the resonant frequency and the quality factor of the microwave resonant circuit with the microwave network analyzer, thereby realizing high-sensitivity detection on the terahertz signal. Compared with conventional direct-current (DC)-biased readout, readout of the microwave resonant circuit is not interfered by an external magnetic field, and has a strong interference resistance.

Abstract: A terahertz graphene Josephson junction detection system based on readout of a microwave resonant circuit includes a graphene Josephson junction detector, a microwave resonant readout circuit, and a microwave network analyzer. The graphene Josephson junction detector and the microwave resonant readout circuit form a microwave resonant circuit. A terahertz signal causes a change of an equivalent microwave inductance of the graphene Josephson junction detector, such that a resonant frequency and a quality factor of the microwave resonant circuit are changed. The present disclosure monitors the resonant frequency and the quality factor of the microwave resonant circuit with the microwave network analyzer, thereby realizing high-sensitivity detection on the terahertz signal. Compared with conventional direct-current (DC)-biased readout, readout of the microwave resonant circuit is not interfered by an external magnetic field, and has a strong interference resistance.

Abstract: A level instrument for surveying a mining subsidence zone in a coal mining area includes a bottom plate, a leveling mechanism, a lifting mechanism, and a level instrument body, where the leveling mechanism is provided on the bottom plate, the lifting mechanism is provided on the leveling mechanism, and the level instrument body is provided on the lifting mechanism. A surveying method using the level instrument is further provided. The level instrument is placed at a surveying location through the bottom plate, a levelness of the level instrument body is directly adjusted through the leveling mechanism below the level instrument body, and a height of the level instrument body is directly adjusted through the lifting mechanism. In this way, the operation process of the level instrument is simplified, and the overall surveying efficiency is improved.

Abstract: The present disclosure belongs to the technical field of PVC foam co-extruded sheets, and particularly relates to a wide low-temperature impact-resistant and bending-resistant PVC foam co-extruded sheet and a preparation method thereof. The PVC foam co-extruded sheet of the present disclosure includes a core layer and a skin layer. Raw materials of the core layer include PVC resin powder, a silicone-methyl methacrylate-ethyl acrylate composite low-temperature toughening and reinforcing agent, a filler, a foaming regulator I, a white foaming agent, a calcium-zinc stabilizer, a cold-resistant plasticizer, stearic acid, polyethylene wax, and oxidized polyethylene wax.

Abstract: Provided is an elliptical multi-mesa laser structure, including a substrate layer, an N-DBR, a functional layer and a P-DBR sequentially arranged from bottom to top. The substrate layer is fixedly connected with an N contact layer. The N-DBR is fixedly connected to a top of the substrate layer, and the N contact layer is arranged around the N-DBR. A space layer is inserted in the N-DBR. The functional layer is fixedly connected to a top of the N-DBR. The P-DBR is fixedly connected to a top of the functional layer, and a top of the P-DBR is fixedly connected with a P contact layer. Another space layer is inserted into the P-DBR.

Abstract: The present disclosure belongs to the technical field of PVC foam co-extruded sheets, and particularly relates to a wide low-temperature impact-resistant and bending-resistant PVC foam co-extruded sheet and a preparation method thereof. The PVC foam co-extruded sheet of the present disclosure includes a core layer and a skin layer. Raw materials of the core layer include PVC resin powder, a silicon-acrylic composite low-temperature toughening and reinforcing agent, a filler, a foaming regulator I, a white foaming agent, a calcium-zinc stabilizer, a cold-resistant plasticizer, stearic acid, polyethylene wax, and oxidized polyethylene wax.

Abstract: Provided is an elliptical multi-mesa laser structure, including a substrate layer, an N-DBR, a functional layer and a P-DBR sequentially arranged from bottom to top. The substrate layer is fixedly connected with an N contact layer. The N-DBR is fixedly connected to a top of the substrate layer, and the N contact layer is arranged around the N-DBR. A space layer is inserted in the N-DBR. The functional layer is fixedly connected to a top of the N-DBR. The P-DBR is fixedly connected to a top of the functional layer, and a top of the P-DBR is fixedly connected with a P contact layer. Another space layer is inserted into the P-DBR.

Abstract: A multilayer film includes a first resin layer and a second resin layer. Each of the first and second resin layers contains a poly(3-hydroxyalkanoate) resin. The ratio of the thickness of the first resin layer to the thickness of the second resin layer is from 1.0:0.015 to 1.0:5.0. A heat quantity ?H of the first resin layer is 30 J/g or more, and a heat quantity ?H of the second resin layer is 25 J/g or less. The heat quantity ?H of each of the first and second resin layers is heat of melting over a temperature range of 130 to 190° C.

Abstract: Provided is a resin film containing a reaction product of 100 parts by weight of a poly(3-hydroxyalkanoate) resin component and 0.01 to 0.5 parts by weight of an organic peroxide. The poly(3-hydroxyalkanoate) resin component includes: a copolymer (A) which is a copolymer of 3-hydroxybutyrate units and 3-hydroxyhexanoate units and in which a content of the 3-hydroxyhexanoate units is from 1 to 6 mol %; and a copolymer (B) which is a copolymer of 3-hydroxybutyrate units and 3-hydroxyhexanoate units and in which a content of the 3-hydroxyhexanoate units is 24 mol % or more.

Abstract: A data compression method is provided for compressing an image. A coding module may select a plurality of pixels with a sequence order from the image, and compress the plurality of pixels to generate a plurality of compressed pixels. For a current pixel p[i] having a previous pixel p[i?1] and a next pixel p[i+1], the coding module generates a coding mode M[i+1] configured for compressing the p[i+1], and generates a fixed-rate compressed value c[i] corresponding to the p[i]. The coding module stores the c[i] in a compressed pixel, and c[i] encapsulates the coding mode M[i+1]. The coding module then stores the plurality of compressed pixels into a compressed image corresponding to the image.

Abstract: A polyvinyl chloride (PVC) foamed ceiling panel and a fabrication method thereof are disclosed. The PVC foamed ceiling panel is made of a PVC resin powder, a filler, a foaming regulator, a composite foaming agent, a calcium-zinc stabilizer, a lubricant, a pigment, a weather resistance modifier, a smoke suppressant, and a flame retardant. The PVC foamed ceiling panel has the advantages of heat resistance, matting, smoke suppression, flame retardancy, environmental friendliness, light weight, small thickness, safety, long-term action, long service life, wide use range, and the like, and can be used for suspended ceilings in residential buildings, office buildings, exhibition halls, conference halls, and the like and for various decorations. The fabrication method of the PVC foamed ceiling panel has the advantages of low cost, high performance, scientific rationality, and simple and easy operation.

Abstract: Disclosed is an SamRNA vaccine, including a recombinant viral vector which includes: i) a viral gene replication complex including nucleotide sequences encoding viral gene replication-related proteins nsP1, nsP2, nsP3, and nsP4; and ii) a nucleotide sequence encoding at least one antigen. According to the SamRNA vaccine of the present invention, in addition to that a promoter of a modified adenoviral vector itself can transcribe an antigen gene to form mRNA, the viral gene replication-related proteins nsP1-4 use RNA as a template to synthesize a large amount of mRNAs, and the immune effect of a target antigen is greatly improved.

Abstract: The method and device for sharing navigation information provided in some embodiments of the present disclosure may obtain a navigation route by determining different road sections in an entire route of a user travel in a process of user travel. Each existing real-time shared navigation route that will enter the road section may be obtained, so as to realize the sharing of the navigation route. Therefore, the computation load for navigation data may be effectively reduced. The occupation and waste of computing resources may be reduced. Further, the convenience and smoothness of travel by the user terminal may be ensured, which is beneficial in improving the experience of the user terminal.

Abstract: By grading preview images of original images for the purpose of filtering eye blink patterns off and/or introducing face smile patterns, a result image can be generated with least eye blink patterns and most face smile patterns for satisfying image quality.

Abstract: Embodiments of the present invention provide a page testing method and a page testing apparatus. The page testing method is used to test a page. The method includes: reading a test sentence used to indicate a page element and a test action; searching for a position where the page element is located on the page according to source code of the page; executing the test action in the position; and verifying an execution result of the test action to obtain a test result. According to the embodiments of the present invention, no action function is needed and instead, a specified test action is triggered directly. Therefore, the complexities of developing and using test software are reduced.

Abstract: An application portal selectively provides a user selective access to data. A data access layer is included in the portal and includes a map associating the user with a permission and further associating a combination of the user and the permission with a data entity, whereby it may be determined whether the user is permitted to access data identified with the data entity. A data stage included in the portal selectively undergoes a synchronization with a remote data store, the synchronization providing data access information that is used to update the map.

Abstract: A multiuser downlink multiple-input multiple-output (MIMO) system with limited channel information feedback includes an error-free channel vector quantization scheme. Each user has multiple antennas, and the base station includes a matching number of antennas. Each MIMO channel is measured at the terminus end of a corresponding user, and used to obtain the channel state information at the receiver (CSIR). A few data bits of CSIR information are feed back to the base station through the limited feedback channels. The base station collects all these CSIR feedback data bits into a CSI at the transmitter (CSIT). The CSIT is used to determine which users are served, and how to configure a corresponding multi-user precoder. The user data channels will later all be transmitted through such precoder. A codebook of channel quantization vectors is pre-defined and distributed amongst the base station and all the users.

Abstract: A first database comprises a data entity and a first data model that models the data entity. An agent comprises a data rule concerning the data entity. A plurality of second databases comprises the data entity. A messaging module comprises the agent and is configured to send a message to at least one of the second databases according to the data rule and the general data model.

Abstract: In one of many possible implementations, an exemplary method comprises maintaining a baseline data structure comprising a plurality of baseline data records and a base set of relationships between the baseline data records, providing, for access by an external party, a customizable data structure comprising copies of the baseline data records and a customizable set of relationships between the copies of the baseline data records, fixing the base set of relationships in the baseline data structure to be unchangeable by the external party, and defining the customizable set of relationships in the customizable data structure to be changeable by the external party. Corresponding systems and methods are also disclosed.

Abstract: A system may include a data store storing global data mapped from local data maintained by a plurality of heterogeneous data subsystems. The system may further include a life cycle coordinator including a global data life cycle model defining at least one life cycle for the global data, said life cycle coordinator being configured to receive a data update message defined in accordance with the global data life cycle model and representative of an update of the local data of one of the heterogeneous data subsystems, the data update message including a life cycle status identifier of a data record associated with the update, translate the data update message to at least one global data operation, the translation being based at least in part on the life cycle status identifier, and apply the update to the global data by performing the at least one global data operation.