42results about How to "Improve the impedance effect" patented technology

The invention relates to a magnesium alloy product surface modification treatment method. The method includes working procedures of degreasing, pickling activation, alkali washing, and chemical modification, wherein an adopted modification solution comprises phosphoric acid, calcium hydroxide, sodium fluoride, zinc phosphate and the like. The method not only can meet the requirements of environmental protection and improve corrosion resistance, adhesive power, low impedance and other properties of a magnesium alloy, but also saves costs.

Structures and configurations for planar ultrawideband modular antenna arrays. One example of a PUMA array includes an unbalanced RF interface, a lattice of horizontal dipole segments directly fed with the unbalanced RF interface, the lattice being arranged in either a dual-offset dual-polarized configuration or a single-polarization configuration, and a metallic plate capacitively-coupled to the lattice of horizontal dipole segments and pinned to a ground plane with a first plated via.

The invention discloses a power management system. A reference power end, a first voltage maintenance module, a first switching module, a charging control module, a forced pull-low module, a first voltage comparison module, a second voltage comparison module and a logic control module are additionally arranged on the basis of a common power management system including an input power terminal, a battery terminal, a system power terminal and a grounding terminal. The provided power management system can automatically reduce the charging current signal until no current signal exists under the condition that the system cannot normally work due to insufficient driving power of the input power supply; and if the input power supply cannot supply the sufficient power for the system, the battery is enabled at the same time, so that the battery and the input power supply simultaneously supply power for the system to ensure the normal work of the system.

The invention relates to the technical field of line protection, and discloses a current-limiting reactor structure for limiting overcurrent in a power system, including a base. The height is too high to continue to contact the spring contactor. At this time, the elastic contactor will disengage from the contact bracket and quickly reset under the action of its own elastic force and contact with the contact bracket II, which shortens the break time during the replacement contact process of the elastic contactor and further improves the stability of the device. The reactor is in contact with the contact bracket II again. At this time, the reactor II and the reactor I are connected to the line together, thereby improving the inductive reactance effect, thereby realizing the effect of adjusting the inductive reactance of the reactor without dismantling and installing. , to avoid the problem of cumbersome operation caused by the disassembly and installation of the traditional reactor when it needs to be adjusted, and to improve the practicability of the device.

Provided are a broadband base station antenna radiating element and an array antenna. The radiating element comprises symmetrical radiating arms, feed pieces, hollow Balun supporting columns, hollow feed supporting columns, feed openings, feed piece fixing parts and feed coaxial cables, wherein two symmetrical radiating arms are intersected and distributed in a cross-shaped mode and symmetrically rotate relative to the center of the radiating element, one arm of the symmetrical radiating arms is connected with the hollow feed supporting columns, and the other arm is connected with the hollow Balun supporting columns. The number of the feed pieces is two, an auxiliary upright metal sheet of each feed piece is fixed in one hollow Balun supporting column, a main upright metal sheet of each feed piece is fixed in one hollow feed supporting column, the feed openings are arranged at the bottoms of the hollow feed supporting columns, outer conductors of the feed coaxial cables are fixed on the feed openings, and inner conductors of the feed coaxial cables are connected with the auxiliary upright metal sheet of one feed piece.

The invention provides a multilayer-polymer surface functional modified electronic fiber cloth flexible high-frequency CCL (copper-clad laminate) and a preparation method thereof. The high-frequency CCL comprises a graphene oxide metallized reinforced nanofiber layer located in the middle layer and conductive high-molecular polymer-insulating high-molecular polymer copolymer coated electronic fiber cloth layers located on two sides. The multilayer-polymer surface functional modified electronic fiber cloth flexible high-frequency CCL has three layers of thin films including the graphene oxide metallized reinforced nanofiber layer which is located in the middle layer and switched between a crystalline metal oxide form and an amorphous metal microform and the polymer copolymer coated electronic fiber cloth layers which are located on the two sides of the graphene oxide metallized reinforced nanofiber layer and have amorphous-state and crystal-state microstructures, the three layers of thin films are subjected to press fit with first copper foil and second copper foil located on the outer layer finally, and the high-frequency CCL which has good tensile property, elasticity modulus andbending strength, is capable of effectively resisting ultraviolet light and increasing light transmittance and has good bonding strength with the copper foil and lower stripping strength is prepared.

The present invention provides a traffic security analysis and modeling method and system. The method includes: importing traffic into a protocol pool corresponding to a bypass traffic mirror according to different protocols, and compressing the traffic in the protocol pool and putting it into a cache The traffic distribution is used for threat analysis. The threat analysis includes analyzing the content and frequency of the traffic packets to form a traffic threat model after unpacking the traffic. The trusted computing component encrypts and decrypts the traffic threat model. The method realizes traffic transmission, and at the same time extracts the characteristic information of abnormal traffic, adopts the method of machine learning and immunity to model the current and future abnormal traffic characteristic information to form a traffic security model. Based on this method, a traffic safety analysis and modeling system is also proposed. The present invention adopts the N-Tier method for layering, and in the network traffic transmission process using the industrial control protocol, based on the network traffic mirror bypass system, non-invasive mirroring of the network traffic is realized.

The invention discloses a preparation method of an anti-overcharged lithium ion battery pole piece and belongs to the technical field of preparation of battery pole pieces. The preparation method disclosed by the invention has the benefits that firstly, sodium dodecyl sulfate is mixed with deionized water to obtain a self-made dispersing liquid, so that the internal resistance of a lithium ion battery is increased, and the side reaction between a negative electrode and an electrolyte is reduced; in addition, particles have high thermal stability; polyethylene, 2-bromoanisole and N-methyl pyrrolidone are subjected to mixed reaction continuously to obtain self-made thermal expansion latex, wherein the polyethylene is a thermal expansion polymer, and once the battery is overcharged or over-discharged, the thermal expansion polymer can quickly expand; in addition, the 2-bromoanisole contains an ortho-bromo group, and the ortho-bromo group increases the stability of a benzene ring Pi bond conjugate system to a certain extent; adsorption products can hinder ion migration, charge transfer and the like, so that the overall impedance property of the battery is increased, and the anti-overcharge and cycle performances of the lithium ion battery pole piece are further improved; therefore, the application prospect is wide.