Abstract: Disclosed is a method for constructing an emergency reporting system of vehicle networking based on multi-signatures, which comprises the following steps: initializing an emergency reporting system to obtain a public-private key pair and pre-calculation parameters of a vehicle set; obtaining authentication information of the emergency based on the public-private key pair and the pre-calculation parameters; integrating the authentication information to obtain multi-signatures of the emergency; and completing the system construction by regulating a traffic state based on the multi-signatures. The method realizes the efficient signature generation function of the vehicle with limited computing resources, reduces the communication pressure and computing pressure of roadside units, and may effectively prevent the common rogue key attacks in other schemes.

Abstract: A dual-pulse excitation method for ultra-fast, super-resolution all-optical magnetic recording includes the steps of: providing a first excitation pulse and a second modulation pulse; and focusing the first excitation pulse and the second modulation pulse, and then radiating the two pulses in sequence to a magneto-optical recording medium, so that an area of the magneto-optical recording medium irradiated undergoes opto-magnetic reversal. By controlling the time delay, spatial overlapping area, and energy density ratio between the dual femtosecond laser pulses, it can induce a second reversal of the magnetization field in the spatial overlapping area of the two pulses on the magneto-optical material that can achieve single-pulse opto-magnetic reversal to obtain all-optical magnetic recording beyond the diffraction limit. This process takes place within several hundred picoseconds, thus providing an effective technical means for ultra-high density and ultra-fast magnetic storage.

Abstract: A method and system for in operando, in situ, and real-time monitoring the state of an electrochemical device, e.g. battery, is provided, which is by means of an optical fiber probe inside the electrochemical device. The method includes: shedding an input light into the optical fiber probe and detecting an output light transmitted therefrom; and determining state of health of the electrochemical device based on the output light. The determination step can be based on a change of the refractive index or of the cladding mode or the surface plasmon resonance, all derived from the output light, in the instant state compared to a prior state. The method can simultaneously detect other parameters including state of charge, temperature, pressure, strain, displacement, vibration, or gas release inside the electrochemical device. With a core mode for correction, the determination of these parameters can also realize a high accuracy.

Abstract: A temperature-sensitive hydrogel material combination, a preparation method thereof, and use thereof are provided. The temperature-sensitive gel material combination provided by the present invention includes an SDF-1-loaded chitosan-hyaluronic acid solution and an Apt19S-loaded chitosan-hyaluronic acid solution. The present invention aims to develop a temperature-sensitive injectable double-layer hydrogel loaded with biological factors capable of promoting cell migration, which is used for promoting the regeneration of periodontal tissues.

Abstract: A text sentiment analysis method based on multi-level graph pooling includes steps of: preprocessing a target text; taking collocate point mutual information between word nodes as an edge weight between the word nodes, and building a graph for each text independently; constructing a multi-level graph pooling model, of which a gated graph neural network layer transfers low-level information, a first graph self-attention pooling layer performs an initial graph pooling operation and uses a Readout function to extract low-level features, a second graph self-attention pooling layer performs a graph pooling operation again, performs a pruning update on the graph structure by calculating attention scores of nodes in the graph and uses a Readout function to extract high-level features; obtaining a multi-level final vector representation through a feature fusion function; and selecting a sentiment category corresponding to a maximum probability value as a final sentiment category output of the text.

Abstract: With the popularity of Blockchain comes grave security-related concerns. Achieving privacy and traceability simultaneously remains an open question. Efforts have been made to address the issues, while they may subject to specific scenarios. The present disclosure proposes a method, a system, and a device for maintaining privacy and traceability of a Blockchain-based system. The method includes: registering in a Blockchain-based system; transmitting a message from a transmitter T to a receiver R via an anonymous network, after a registration request of the transmitter T has been approved and storing message transmission data generated during a message transmission process in a Blockchain; and performing an identity disclosure by using the message transmission data when the message is detected to be false. The anonymous network may transmit the message by onion routing. The solution proposed by the present disclosure can achieve traceability and privacy for a Blockchain-based system simultaneously.

Abstract: A social recommendation method based on a multi-feature heterogeneous graph neural network is provided and includes: extracting attribute information of users and topics to code; processing user coding information and topic coding information through a multi-layer perceptron to obtain initial feature vectors of the users and the topics; establishing a heterogeneous graph by taking the users and the topics as nodes; inputting the heterogeneous graph into a heterogeneous graph neural network to perform information transmission in combination with an attention mechanism, and updating the feature vectors; and performing similarity calculation on the feature vectors of the users, and selecting the user and the topic with the highest similarity with the feature vector of the user for recommendation. Social information can be mined more comprehensively, features of users and interested topics of the users can be deeply fused, and recommendation accuracy and user experience can be improved.

Abstract: The invention discloses a microlens and an application thereof, wherein the microlens is a lipid particle. The microlens prepared by the invention is simple in preparation and extraction methods, and does not need extra processing. The lipid particle is capable of serving as an optical element inside a cell to exert an optical function and has a complete biocompatibility; and meanwhile, the lipid particle is naturally generated inside the cell, and has a natural position-close relationship with a microstructure inside the cell, and is capable of collecting and re-positioning an optical signal of the microstructure in a near field, so that an imaging quality of the cell microstructure of an optical microscope is effectively improved.

Abstract: An electrode material, its manufacturing method, and its use as a cathode material in batteries are provided. The electrode material comprises a plurality of nanoparticles, each having a diameter of approximately 100-400 nm and comprising a core and a shell encapsulating the core. The shell comprises carbon and nitrogen, respectively having a mass fraction of approximately 70-90% and approximately 5-20% relative to a total mass of the shell. The core comprises sulfur, having a mass fraction of approximately 40-97% relative to a total mass of the core. The core has a mass fraction of approximately 50-90% relative to a total mass of each nanoparticle. The electrode material can be used in a cathode of a Li—S battery, which has a good energy storage capacity, a high electrochemical stability, and a low capacity decay.

Abstract: A fiber-optic sensing apparatus is provided, including an outer sleeve, an optical fiber sensor arranged within the outer sleeve, and a filling medium. The optical fiber sensor is capable of detecting a change of a refractive index or a change of surface plasmon waves over an outer surface of the outer sleeve. The filling medium may have a matching refractive index with the outer sleeve and with the optical fiber sensor. The outer sleeve may be exposed directly to the outside medium, or may be coated with at least one functional film layer such as a surface plasmon resonance (SPR)-active base film layer, or a reactive film layer that is reactive to a target molecule in the outside medium.

Abstract: The present disclosure discloses a polarization-maintaining hollow-core antiresonant fiber. An inner layer of the polarization-maintaining hollow-core antiresonant fiber includes first thin walls, second thin walls, and third thin walls. The present disclosure introduces high birefringence through the wall thickness difference between the first thin wall and the second thin wall, and effectively amplifies a birefringence effect achieved by the wall thickness difference through quasi multi-symmetric structures of the first thin walls and the second thin walls. In addition, the present disclosure reduces the transmission loss and suppresses the leakage of light through the inner layer, particularly, the third thin walls of the inner layer, so that the fiber of the present disclosure realizes polarization maintaining, and meanwhile, reduce the loss as far as possible.

Abstract: A fiber-optic sensing apparatus, system, and method for characterizing at least one metal ion in a solution are provided. The sensing apparatus includes a fiber-optic sensor and a controller. The sensor includes an optical fiber with tilted grating in its core, and includes a conductive and surface plasmon resonance (SPR)-active coating assembly that allows the sensor to also serve as an electrochemical working electrode. The controller is electrically connected with the sensor, configured to provide an adjustable potential such that when the coating assembly is in contact with the solution, redox reactions of each of the at least one metal ion occur on an outer surface thereof, resulting in a detectable change of the surface plasmon waves generated in the fiber-optic sensor. Based on the change thus detected, identities and/or concentration of the at least one metal ion in the solution can be determined with high accuracy and sensitivity.

Abstract: Provided are a series of crocins compounds and related pharmacological applications thereof in prevention and treatment of Alzheimer's disease. The series of crocins compounds are obtained by taking the Chinese herb, namely Gardenia jasminoides Ellis, as a raw material and separating same by means of various methods. The compounds playing a role in preventing oxidative injury caused by hydrogen peroxide (H2O2) and excitatory amino acid injury caused by L-glutamic acid are screened out by in-vitro cell experiments. The results show that the crocins compounds have good effect in preventing cell injury caused by H2O2 and L-glutamic acid. The compounds have good effect in preventing and treating Alzheimer's disease due to the fact that significant rise of oxidative stress and excitatory amino acid is a key factor for nerve injury in Alzheimer's disease, and have broad development and application prospect.

Abstract: The present invention provides indazole derivatives or their pharmaceutically acceptable salts or stereoisomers having the structure shown in formula (I), and their pharmaceutical compositions and applications thereof. Such compounds can be used as protein kinase inhibitors, which can effectively inhibit the activity of tropomyosin receptor kinase (TRK) protein kinase and can inhibit the proliferation, migration and invasion of a variety of tumor cells.

Abstract: An electrical readout optical sensor, includes a back metal electrode layer, a semiconductor layer, and a metal or metalloid layer; wherein the semiconductor layer is a main body portion and is divided into a first surface and a second surface; the first surface is provided with a groove structure, and forms a grating; the back metal electrode layer covers the second surface of the semiconductor layer; the metal or metalloid layer covers the first surface of the semiconductor layer, and forms a phototube for generating a photocurrent signal having a wide wavelength range and high linearity. An optical sensing structure of narrowband light absorption and a photoelectric conversion structure having a wide wavelength range are directly integrated, and the portable high-precision optical sensing ability is implemented by means of an output mode of a photocurrent.

Abstract: A method for pairing a plurality of devices in the context of internet of things (IoT), including: connecting power supplies of the plurality of devices to a same power source, wherein the plurality of devices includes an initiator device and a responder device; synchronizing clocks of the initiator device and the responder device; switching the power source off and on for a plurality of times n; recording time stamps S(T)={T1, T2, T3, . . . Tn} corresponding to time stamps when the initiator device and the responder device switch off in response to switching off of the power source; and performing the pairing of the initiator device and the responder device if each of the initiator device time stamps is within a predefined delay tolerance of a corresponding time stamp of the responder device time stamps, otherwise rejecting the pairing of the initiator device and the responder device.

Abstract: Provided are a repair peptide for use in promoting post-traumatic tissue repair and regeneration, and an application thereof. The repair peptide is a linear or cyclic peptide which is 4-15 amino acids in length and which contains four or more consecutive GPANVET core sequences.

Abstract: A method of digital forensics based on blockchain technology and a fine-grained access control scheme, using a finite state machine (FSM) based on smart contracts to manage a digital certificate, where a law enforcement agency ends the warrant request to a court and upon approval of the request collects the forensics data by obtaining the master secret key for accessing the forensic data from a plurality of authorities. The forensics data are encrypted by D-KP-ABE (Distributed Key Police Attribute-based Encryption) with privacy-preserved access policy. The secret sharings are required to form the decryption key for accessing the forensics data. The secret sharings are distributed among the plurality of authorized authorities so that no individual authority has a complete master key by itself. Each state of the FSM requires digital signature(s) of at least one specific authorized authority for transitioning to a next state.

Abstract: The present invention relates to dicaffeoyl spermidine derivative glycosides, a preparation method and a use thereof. The biological activity experiments show that the dicaffeoyl spermidine derivative glycosides of the present invention have anti-oxidative activity and antiviral activity, and their activity are even better than that of a positive control drug, thus can be used as an antioxidant for the prevention and/or treatment of neurodegenerative diseases such as Senile dementia, and as an antiviral agent for the prevention and/or treatment of viral infections.

Abstract: The present disclosure discloses a polarization-maintaining hollow-core antiresonant fiber. An inner layer of the polarization-maintaining hollow-core antiresonant fiber includes first thin walls, second thin walls, and third thin walls. The present disclosure introduces high birefringence through the wall thickness difference between the first thin wall and the second thin wall, and effectively amplifies a birefringence effect achieved by the wall thickness difference through quasi multi-symmetric structures of the first thin walls and the second thin walls. In addition, the present disclosure reduces the transmission loss and suppresses the leakage of light through the inner layer, particularly, the third thin walls of the inner layer, so that the fiber of the present disclosure realizes polarization maintaining, and meanwhile, reduce the loss as far as possible.