10results about How to "Increase entropy" patented technology

The invention relates to a true random number generator and an entropy maintenance method thereof. The true random number generator comprises a plurality of first ring oscillation output circuits, and the entropy maintaining method of the true random number generator comprises the following steps: providing at least one second ring oscillation output circuit in the true random number generator, the at least one second ring oscillation output circuit is not started during initial operation; after the true random number generator starts to operate, recording logic of a random bit signal generated at each default time; counting the logic of the random bit signal to obtain a statistical value; and according to the statistical value, determining whether the second ring oscillation output circuit performs combined operation or not so as to generate the random bit signal.

The invention relates to the technical field of lithium ion batteries, in particular to a high-entropy electrolyte, a preparation method thereof and a lithium ion battery. The invention provides a high-entropy electrolyte. The high-entropy electrolyte comprises a lithium salt, an organic solvent and an additive, the types of the organic solvents are more than or equal to 6, and the mass of each organic solvent accounts for more than 6% of the total mass of the organic solvents; the types of the lithium salts are greater than or equal to 2, and the mass of each lithium salt accounts for more than 20% of the total mass of the lithium salts. According to the high-entropy electrolyte disclosed by the invention, the low-temperature performance of the electrolyte is improved, and meanwhile, other performances such as normal-temperature cycle performance and high-temperature cycle performance can be considered by improving the confusion degree of the organic solvent and the lithium salt, increasing the entropy value of the electrolyte and adjusting the solvation structure of lithium ions; the high-entropy electrolyte is used in the lithium ion battery, so that the lithium ion battery has excellent low-temperature DCR, low-temperature discharge performance, normal-temperature cycle performance and high-temperature cycle performance.

The invention relates to the technical field of batteries, in particular to an electrolyte, a cathode-free lithium metal battery and electric equipment. The electrolyte comprises a lithium salt, a solvent and a diluent, the solvent comprises at least two of cyclic ether solvents; the diluents comprise at least two of fluorobenzene diluents. According to the electrolyte disclosed by the invention, various cyclic ether solvents and various fluorobenzene diluents are mixed, so that the entropy value of the electrolyte is increased, the disorder of the electrolyte is improved, the formation of the weak solvated electrolyte is promoted, the stability of an electrode interface is favorably improved, and the ion transference number and the ion conductivity of the electrolyte are improved. The electrolyte provided by the invention is suitable for the negative-electrode-free lithium metal battery, and the prepared negative-electrode-free lithium metal battery has high coulombic efficiency and excellent cycle performance and rate capability.

The gradient hard alloy comprises a core layer and surface layers, the core layer is located between the two surface layers, each of the core layer and the surface layers comprises a hard phase and a high-entropy binding phase, and the hard phase comprises WC and a cubic phase compound; components of the high-entropy binding phase comprise at least five of first transition metal elements and second transition metal elements, the first transition metal elements comprise at least two of Co, Ni and Fe, the second transition metal elements comprise at least three of Re, Ru, Rh, Pd, Os, Ir and Pt, the mass content of the high-entropy binding phase on the surface layer is 1.0-2.0 times of the nominal mass content, the surface layer is free of cubic phase compounds, and the thickness of the cubic phase compounds is 0.5-1.5 mm. The gradient hard alloy has the advantages of being high in density, free of third phase precipitation and good in alloy performance.

The invention discloses a key generation method and device, a terminal, network equipment, a storage medium and a computer program product. The method comprises the following steps: under the condition that both a terminal and a network side support a first capability, the terminal generates an access layer (AS) related key based on a first key and a second key; the first capability is used by the terminal to negotiate the first key with the network side, and the first key is associated with a wireless channel feature; the second key is used for performing encryption and integrity protection of the AS under the condition that the terminal and / or the network side does not support the first capability.

The invention belongs to the technical field of high-entropy alloy catalysts, and particularly relates to a high-entropy alloy nanoflower array, a preparation method of the high-entropy alloy nanoflower array and application of the high-entropy alloy nanoflower array as an electrode material. The high-entropy alloy nanoflower array disclosed by the invention comprises five metal elements, namely Co, Ni, Mo, Cu and Zn. The high-entropy alloy nanoflower array is composed of a plurality of two-dimensional nanosheets, and a three-dimensional (3D) porous nanostructure with a large specific surface area is constructed. The material provided by the invention has the advantages of simple preparation, high loading capacity, no precious metal, low cost, high efficiency and stability, and can be used as an electrode of a hydrogen evolution reaction, a hydrazine oxidation reaction and a hydrazine oxidation assisted hydrogen production (OHzS) system. When applied to an OHzS system, only 0.260 V battery voltage and 0.376 V battery voltage are needed to reach the industrial current density of 500 mA cm <-2 > and 1000 mA cm <-2 > respectively, the absolute advantages of high efficiency and low-voltage hydrogen production are shown, and high practical application value is achieved.

The present invention discloses a communication data security transmission system based on blockchain, which relates to the technical field of communication data security transmission, including a key randomness evaluation module, an encryption strength prediction module, a key encryption level classification module and a key complexity enhancement module; the key randomness evaluation module obtains the key generated when data is encrypted, and performs randomness evaluation on the generated key. The present invention divides the generated keys into high randomness and low randomness keys by performing randomness evaluation on the generated keys, ensuring that only keys with high security are directly used for data encryption. For keys with low randomness, their hash characteristics are further obtained, and the encryption strength is predicted using a machine learning model. For keys with insufficient encryption, a key derivation function is used to enhance their complexity, and security is improved by iterative hashing algorithms and random salts, ensuring that the keys meet security standards, preventing potential cryptographic attacks, and sounding an alarm when necessary to enhance the security of the system.

The present invention relates to the field of electrode material preparation, and in particular to a preparation method and application of a high entropy Prussian blue sodium ion battery positive electrode material. The preparation method of the high entropy Prussian blue sodium ion battery positive electrode material provided by the present invention comprises the following steps: mixing a solution of a transition metal salt and a sodium salt with a solution of sodium ferrocyanide, sodium citrate, and a surfactant, stirring and reacting, standing for aging, filtering, washing, and drying to obtain the high entropy Prussian blue sodium ion battery positive electrode material; wherein the metal ions in the transition metal salt are divalent iron ions, divalent manganese ions, divalent cobalt ions, divalent nickel ions, and divalent copper ions; the concentration of sodium citrate in the solution of sodium ferrocyanide, sodium citrate, and a surfactant is 120-3000mmol / L. The material obtained by the preparation method of the present invention is applied to sodium ion batteries to comprehensively improve the cycle stability, specific capacity, and voltage of sodium ion batteries.

This application discloses a self-excited random number generation system and method based on a nanophotonic PUF, belonging to the field of hardware anti-counterfeiting technology. The system includes a light source, a filtering unit, an image generation unit, and an image processing unit. The light source outputs an incident beam. The filtering unit performs spatial filtering and collimation amplification on the incident beam, and filters out high-frequency noise and stray light in the incident beam, outputting a uniform beam. The image generation unit includes a spatial light modulator and a nanophotonic PUF. The spatial light modulator is used to receive the uniform beam output by the filtering unit and modulate the uniform beam according to the modulation source data. The nanophotonic PUF generates a speckle image after being excited by the uniform beam. The image processing unit processes the speckle image and generates modulation source data, and simultaneously sends the modulation source data to the image generation unit to modulate the uniform beam to form a self-excited loop. The image processing unit is also used to process the speckle image to form a binary random matrix, and serialize the random matrix into a one-dimensional random bit sequence as a random number. This application not only features high random number entropy, strong unpredictability, and excellent anti-attack capability, but also has the advantages of good system compatibility and independence from external data dependence, making it widely applicable in scenarios such as high-security key generation and encrypted communication.

The present disclosure belongs to the field of battery materials, and in particular relates to a lithium-rich layered oxide material and preparation method therefor and application thereof. Primary particles of the lithium-rich layered oxide material according to the present disclosure are polyhedrons with an exposed {010} crystal plane, and an area of the {010} crystal plane accounts for >20%. In the present disclosure, by introducing a design of multiple cationic component with a high entropy into the LLO material, the configurational entropy of the system is improved, thereby providing the material with a high structural stability and a stable ion diffusion channel; at the same time, the changes in entropy further affect the thermodynamically stable structure and crystal plane energy of the system, achieve local minimization of Gibbs free energy, and induce the exposure of the {010} crystal plane with a fast lithium ion transport channel, which provides more channels for rapid ion migration and improves electrode reaction kinetics. Experimental results show that the lithium-rich layered oxide material according to the present disclosure has a high rate performance and a long cycle stability when used as a cathode material of a lithium battery.