62 results about "Conduction channel" patented technology

The invention discloses a method for in-situ growth of SiOx in a carbon nanotube cluster by using a liquid phase method and application, and belongs to the technical field of functional materials. The method comprises the following steps: dissolving silane A and silane B in a hydrochloric acid solution to obtain a silane mixed solution; the preparation method comprises the following steps: dispersing carboxylated carbon nanotubes in deionized water to obtain a carbon nanotube dispersion liquid; adding the carbon nanotube dispersion liquid into the silane mixed solution, stirring and mixing, aging at normal temperature, collecting a precipitate, and drying; and carrying out high-temperature pyrolysis carbonization on the dried product in an inert gas atmosphere to obtain the CNTs (at) SiOx-F (at) C composite material. The carbon nanotubes in the obtained material are intertwined to form a cluster structure due to the crosslinking effect of silane, and SiOx grows on the tube walls of the carbon nanotubes in clusters. The special structure has a rapid electron and ion conduction channel, and internal gaps can relieve volume expansion in the SiOx circulation process, so that the comprehensive electrochemical performance of the silicon-oxygen negative electrode in the lithium ion battery is improved.

The invention discloses a coating diaphragm and a preparation method thereof, the coating diaphragm comprises a base film, a first coating and a second coating, the first coating and the second coating are respectively located on two sides of the base film; the first coating comprises sodium carboxymethyl cellulose, a metal organic framework, a modified solid electrolyte and a first pressure-sensitive adhesive, and the modified solid electrolyte is obtained by modifying a solid electrolyte with silicon resin; and the second coating comprises sodium carboxymethyl cellulose, a polyvinylidene fluoride-hexafluoropropylene copolymer, an emulsion type binder and a second pressure-sensitive binder. The solid electrolyte has a rigid framework to provide a rapid conduction channel, and the metal organic framework has a high specific surface area and can cooperate with the solid electrolyte to construct a three-dimensional network, so that the stable performance of the coating diaphragm is guaranteed.

The invention discloses a semi-solid lithium-sulfur battery composite pole piece and a preparation process, and relates to the technical field of energy storage materials. The pole piece adopts a gradient composite structure of a sulfur-based active layer, a conductive network layer, a transition layer and an electrolyte interface layer, wherein the sulfur-based active layer is combined with a surface modifier through a microporous carbon carrier to realize efficient fixation of sulfur; the conductive network layer constructs a three-dimensional interpenetrating conduction channel, and the electron / ion transmission efficiency is synchronously improved; the transition layer buffers volume expansion stress through gradient composite design; and the electrolyte interface layer forms a low-impedance compact structure through in-situ polymerization. The preparation process comprises the key procedures of current collector surface treatment, conductive layer construction, gradient hot-pressing compounding, interface layer in-situ forming and the like. According to the technical scheme, the problems of capacity fading, interface failure and the like of a traditional lithium-sulfur battery are effectively solved, and the lithium-sulfur battery is suitable for development of high-energy-density energy storage devices.

The utility model relates to the technical field of magnetic disk control, and discloses an ultra-thin magnetic disk controller, which comprises a controller main body, a metal heat dissipation plate is tightly attached and fixed at the bottom of the controller main body, and a plurality of heat dissipation fins are uniformly and vertically distributed at the bottom end of the metal heat dissipation plate so as to increase the heat dissipation area; and a heat-conducting copper pipe. According to the utility model, the controller main body is tightly connected with the metal heat dissipation plate, and the heat dissipation fins reasonably distributed at the bottom end are matched, so that the heat dissipation area is greatly increased, and heat generated by the controller main body can be quickly dissipated to the surrounding; secondly, the heat conduction copper pipe is accurately connected with the heating source main chip, the power amplifier and the heat dissipation fins, an efficient heat conduction channel is opened up for heat by means of the excellent heat conduction performance, and it is ensured that the heat is conducted out in time; and moreover, the shell is made of a high-thermal-conductivity plastic material and is provided with regular micro heat dissipation holes, so that the ultrathin structure is maintained, the efficient heat exchange between the inside and the outside air is ensured, and the heat dissipation is further enhanced.

The utility model relates to an EVA (Ethylene Vinyl Acetate) cold and hot shaping device which comprises a rack, a hot pressing plate, a cooling plate, a condensing pipe, a movable plate and a driver, the hot pressing plate is fixedly arranged on the rack; the cooling plate is fixedly arranged on the rack, the cooling plate and the hot pressing plate are correspondingly arranged up and down, a containing cavity is formed in the cooling plate, the cooling plate is provided with an air inlet pipe and an air outlet, and the air inlet pipe and the air outlet are both communicated with the containing cavity; the condensation pipe is arranged in the accommodating cavity; the movable plate is connected with the rack in an up-down moving manner, the movable plate is arranged between the hot pressing plate and the cooling plate, a conduction channel is arranged in the movable plate, a conduction hole is formed in the upper end of the movable plate, the conduction hole is communicated with the conduction channel, and the air outlet is communicated with the conduction channel; the driver is fixedly arranged on the rack, and the telescopic end of the driver penetrates through the cooling plate to be fixedly connected with the movable plate. The EVA workpiece cooling device can directly cool an EVA workpiece after hot pressing and shaping, does not need to be operated by workers, is good in cooling effect, shortens cooling time and improves production efficiency.

The application discloses an amine functionalized molecular sieve composite electrolyte membrane and a preparation method and application thereof, and belongs to the technical field of battery materials, wherein the preparation method of the amine functionalized molecular sieve composite electrolyte membrane comprises the following steps: dispersing a polymer matrix and a metal salt in an organic solvent to obtain a mixed solution A; adding dried amine functionalized molecular sieve material into the mixed solution A to obtain a mixed solution B; performing dispersion treatment on the mixed solution B at 50-70 DEG C to form a continuous penetration network, and obtaining a composite solution; casting the composite solution into a film, naturally evaporating, and then performing vacuum drying to obtain the molecular sieve composite electrolyte membrane. The application realizes the synergistic improvement of the polymer electrolyte in ion conductivity, mechanical stability and interface stability by constructing a multistage metal ion conduction channel and an interface enhanced network, thereby effectively solving the problems of low conductivity, poor interface stability and insufficient mechanical properties of the traditional polymer electrolyte.

The invention provides a solid electrolyte, a sandwich structure solid electrolyte membrane and a preparation method and application, and relates to the technical field of solid batteries, the solid electrolyte provided by the invention has the advantages that Li ions are partially replaced by M ions, and the radius of the M ions is larger than that of Li, so that higher degree of freedom is provided for residual Li, and coordination of alkali metal in a migration process is facilitated. Cl is replaced by cluster ions, and the cluster ions provide more degrees of freedom, so that coordination of alkali metal in a migration process is facilitated, and relatively high ionic conductivity is achieved. A double-doping strategy of M and A generates a synergistic effect, so that not only is the mobility of a cationic sublattice optimized, but also a conduction channel of an anionic skeleton is widened, and the ionic conductivity is improved by one order of magnitude compared with that of a traditional sulfide electrolyte. In addition, the solid electrolyte has good structural stability and excellent processability.

The invention relates to the technical field of stress relieving devices, and discloses a device and method for relieving welding residual stress of a super-thick non-ferrous metal part, the device comprises an explosion tank and a hardening container, and explosion impact is generated in the explosion tank to conduct residual stress relieving on a metal workpiece in the hardening container; a guide channel is formed in the hardening container, a self-adaptive channel is formed in the guide channel, the self-adaptive channel can be adjusted in a user-defined mode so as to correspond to the welding seam shape of the metal workpiece, a conduction channel for explosive impact to pass through is formed in a gap between the two sets of flexible clamping plates, and the explosive impact is conducted to the welding seam of the metal workpiece through the conduction channel. A directional conduction channel is formed through the gaps of the flexible clamping plates, shock wave energy is efficiently focused on a welding seam, stress is accurately eliminated, energy scattering is avoided, the anti-explosion stability is achieved, the flexible clamping plates made of metal woven materials have the impact resistance and the flexible deformation capacity, the sealing performance of the channel is maintained under high-pressure explosion, and energy leakage is prevented.

The invention belongs to the technical field of sodium ion battery materials, and particularly relates to a sodium-containing modified polyvinylidene fluoride binder as well as a preparation method and application thereof. The sodium-containing modified polyvinylidene fluoride binder comprises a sodium-containing functional unit-polyvinylidene fluoride copolymer, alkannin and a lophatherum gracile polysaccharide stabilizer, wherein the alkannin is grafted on the surface of the sodium-containing functional unit-polyvinylidene fluoride copolymer; the sodium-containing functional unit is combined with a polyvinylidene fluoride main chain through covalent bond grafting. According to the preparation method, the sodium-containing functional unit-polyvinylidene fluoride copolymer is prepared, polyvinylidene fluoride has a bonding function, the sodium-containing functional unit can release sodium ions, compensate sodium loss of the first cycle of the positive electrode and improve the first effect performance, and the sodium-containing functional unit and the polyvinylidene fluoride are connected through a covalent bond to construct a sodium ion conduction channel, so that the conductivity of the sodium ions is improved; meanwhile, a sodium supplementing agent and a conductive polymer with a certain volume are prevented from being introduced into the binder, and the high-activity substance proportion and the binding performance of the binder can be kept.

A multiple gate system for realizing the quantum anomalous Hall effect, including a top channel electrode which controls carrier density and electric field in a conduction channel, a first dielectric layer for the top channel gate, a patterned contact gate electrode which controls earner density on the contact and screens the top channel electrode's electric field on the contact, and a second dielectric layer for the contact gate, an electrically tunable material comprising semiconducting molybdenum ditelluride in the form of a first atomic sheet and a second atomic sheet, wherein first atomic sheet is rotated planarly from the second atomic sheet by about 2.5 to about 5 degrees, to form a geometrically stacked homobilayer moiré superlattice configured to host ferromagnetic states that spontaneously break time-reversal symmetry, where a perpendicular electric field is applied to the electrically tunable material, tuning the quantum anomalous Hall effect.

A hearing instrument system is proposed, comprising a hearing instrument (1) having a housing (12) and at least one speaker (8) disposed within the housing (12), the speaker being connected to the environment of the housing (12) via a sound conduction channel (14). Furthermore, the hearing instrument system has a controller (6) configured to determine whether at least one initiation condition exists for realizing a cleaning mode of the sound conduction channel (14), and if such initiation condition exists or one of a plurality of possible initiation conditions, to initiate a cleaning mode and, during the cleaning mode, to emit a sound signal with a predetermined waveform having a varying periodic duration through the speaker (8).

The invention discloses a flame temperature image conduction device of a combustion furnace and flame temperature image detection equipment, the flame temperature image conduction device of the combustion furnace comprises a heat-resistant metal tube, a vacuum cavity is arranged in the heat-resistant metal tube, and one end of the heat-resistant metal tube is at least partially bendable and is suitable for corresponding to flame of the combustion furnace; the optical fiber matrix is arranged in the vacuum cavity, an image conduction channel is formed in the optical fiber matrix, and the image output end of the image conduction channel is suitable for corresponding to the camera; and the Peltier refrigeration part is arranged on the circumferential outer side of the optical fiber matrix in a sleeving manner and is attached to the optical fiber matrix. Therefore, one end of the heat-resistant metal tube is at least partially bendable, the range of a flame temperature image of a conduction combustion furnace can be widened, the optical fiber matrix can resist high temperature and corrosion, and the flexibility of the optical fiber matrix can be matched with the bending angle of the heat-resistant metal tube. In addition, the cooling efficiency of the Peltier refrigerating part is high, and the temperature can be accurately controlled.

The invention relates to a low-voltage cabinet cooling method and system, an intelligent terminal and a storage medium, and relates to the technical field of low-voltage cabinet cooling, and the method comprises the steps: monitoring the temperature inside and outside a low-voltage cabinet; calculating a difference value between the temperature inside the cabinet and the temperature outside the cabinet to obtain a temperature rise value; if the temperature in the cabinet is greater than the first temperature threshold value or the temperature rise value is greater than the second temperature threshold value, acquiring an abnormal position corresponding to the temperature in the cabinet; if the abnormal position is located at the bottom or the top of the low-voltage cabinet, a cooling device of the low-voltage cabinet is started, an auxiliary device is arranged in the containing cavity and is close to a conduction channel in the low-voltage cabinet, and the conduction channel penetrates through the containing cavity; if the abnormal position is located in the middle of the low-voltage cabinet, determining a cavity number of the abnormal position in the low-voltage cabinet; determining a target auxiliary device corresponding to the cavity number; and the cooling device and the target auxiliary device are started at the same time, so that the target auxiliary device sucks air from the conduction channel. The low-voltage cabinet has the effect of improving the heat dissipation efficiency of the low-voltage cabinet.

An improved reverse field-effect transistor semiconductor device and its fabrication method may include a source layer at the bottom and a drain at the top of a semiconductor substrate, and a vertical conduction channel between the source layer and the drain region, the trench being controlled by a trench gate electrode disposed in a gate trench lined with insulating material. A heavily doped drain region is disposed near the top of the substrate surrounding the upper portion of the shielding trench and the gate trench. A doped body contact region is disposed in the substrate and surrounding the lower portion of the shielding trench. A shielding electrode extends upward from the source layer in the shielding trench for electrically short-circuiting the source layer and the body region, wherein the shielding structure extends upward to the heavily doped drain region and is insulated from the heavily doped drain region to serve as a shielding electrode.

The invention provides a negative electrode binder, a negative plate and a lithium ion battery. The negative electrode binder comprises a basic binding phase, a dynamic crosslinking phase and a conductive reinforcing phase. According to the negative electrode binder, the negative electrode plate and the lithium ion battery, the negative electrode binder is a composite system, dopamine modified polyacrylic acid is taken as a basic framework, a dynamic hydrogen bond network is constructed by introducing boric acid, and meanwhile, PEDOT: PSS can be compounded to form a double-conductive network. Wherein dopamine is modified to improve the density of hydrogen bond sites, boric acid is introduced into a dynamic reversible hydrogen bond to realize room-temperature self-repairing, and PEDOT: PSS and SuperP cooperate to construct an electron and ion double-conduction channel. The silicon-based negative electrode plate adopting the binder can effectively relieve volume expansion of silicon in the charging and discharging process, the cycling stability and the energy density are remarkably improved, and the silicon-based negative electrode plate is suitable for the field of high-performance lithium ion batteries.

The utility model discloses a sound box rotary table which comprises a base, a rotary table body and a rotary table, the rotary table body and the rotary table are arranged on the base, a motor, a loudspeaker and a vibrating diaphragm are arranged in the rotary table body, the loudspeaker and the vibrating diaphragm are adjacently arranged at the top of the rotary table body, and a driving shaft of the motor extends out of the rotary table body to be connected with the rotary table. The rotating disc covers the loudspeaker and the vibrating diaphragm, and a sound wave conduction channel is formed by the distance between the rotating disc and the rotating table body. According to the loudspeaker box rotary table provided by the utility model, the rotary table is driven by the motor to rotate, so that exhibitions can be enjoyed by exhibition users in an omnibearing and multi-angle manner, the loudspeaker box and the rotary table are integrated, music emitted by the loudspeaker box can be enjoyed when the exhibitions are carried, and the use experience of the exhibition table is improved.

The present application provides an adjustable powder spray bottle with a switch structure, comprising a bottle body and a bottle cap, the bottle cap being movably mounted on the top of the bottle body, a rod body component with a conduction channel being movably mounted in the bottle body, and a nozzle component connected to the bottle cap comprising a connecting portion, the connecting portion having a guide rod and a discharge rod distributed vertically, the guide rod and the discharge rod being connected to each other and forming a discharge channel, a limiting portion and an opening being provided in the bottle cap, part of the guide rod passing through the opening and embedded in the accommodating groove, when the bottle body and the bottle cap are connected, the conduction channel and the discharge channel are connected through the overflow hole provided by the limiting portion, thereby realizing the flow of medicine powder, and the overflow hole is blocked or moved away by the movement of the guide rod in the accommodating groove, thereby realizing the opening or closing of the flow, and the rotation of the guide rod in the opening can drive the synchronous rotation of the discharge rod, thereby realizing the adjustment of the nozzle angle, thereby solving the problem that the nozzle angle of the existing powder spray bottle is fixed, resulting in limited user experience.

The invention discloses an absorption core body, a preparation method and device of the absorption core body and a hygienic product, and relates to the technical field of personal hygienic products. The functional fiber layer is laminated with the framework layer and is used for absorbing liquid; at least one protruding part is arranged on the side, facing the framework layer, of the functional fiber layer, and at least part of the protruding part is located in the framework layer. The protruding part forms a liquid conduction channel between the skeleton layer and the functional fiber layer; and the cross sectional area of the convex part is continuously and progressively decreased from the functional fiber layer to the skeleton layer along the axial direction. According to the absorption core body, the three-dimensional cotton non-woven fabric serves as a framework, the absorption core body is endowed with excellent elasticity and toughness, meanwhile, the protruding parts at least partially located in the framework layer are arranged in the functional fiber layer with the liquid absorption function, a three-stage liquid absorption system of surface layer rapid capture, channel conduction and framework layer storage is constructed, and the absorption effect is improved. And efficient absorption of liquid is realized.

A hearing instrument system has a hearing instrument with a housing and at least one loudspeaker arranged in the housing connected to an environment of the housing via a sound conduction channel. The hearing instrument system further has a controller configured to ascertain whether at least one starting condition for initiating a cleaning mode for the sound conduction channel is present. If the or one of multiple, as appropriate, starting conditions is present, initiate the cleaning mode, and during the cleaning mode, output an audio signal with a specified waveform with a varying period using the loudspeaker.

A hearing instrument system is described, comprising a hearing instrument (1) with a housing (12) and at least one loudspeaker (8) arranged in the housing (12), which is connected to the environment of the housing (12) via a sound conduction channel (14). Furthermore, the hearing instrument system includes a controller (6) configured to determine whether at least one start condition for initiating a cleaning mode for the sound conduction channel (14) is present, to initiate the cleaning mode if the start condition or one of possibly several is present, and to emit a tone signal in the form of a chirp via the loudspeaker (8) during the cleaning mode.

The invention relates to the technical field of semiconductors, and discloses a transistor, a manufacturing method and an electronic device.The transistor comprises a drain electrode, a conductive substrate, a semiconductor layer and a source electrode which are sequentially stacked, and the semiconductor layer comprises a first semiconductor, a second semiconductor and a third semiconductor which are arranged in the first direction; the first semiconductor and the second semiconductor form a first channel, the second semiconductor and the third semiconductor form a second channel, the first direction is parallel to the surface of the conductive substrate, the extending direction of the first channel and the second channel is perpendicular to the first direction, the source electrode is connected with the first channel and the second channel, and the drain electrode is connected with the first channel and the second channel. The projection of the grid electrode to the first channel is overlapped with the first channel, the projection of the grid electrode of the transistor to the second channel is overlapped with the second channel, the first channel and the second channel form a vertical conduction channel, and the first channel and the second channel are connected in parallel, so that the lower specific on-resistance is realized, and the power loss of the transistor is lower.

The invention provides a porous graphene negative electrode material and a preparation method thereof, and relates to the technical field of graphene materials, and the porous graphene negative electrode material comprises the following components in parts by mass: 10-30 parts of graphene, 2-8 parts of carbon nanotubes, 5-15 parts of a nitrogen source, 1-5 parts of nano metal particles, 0.5-3 parts of a dispersant and 50-80 parts of a solvent; the carbon nanotubes are used for connecting dispersed graphene sheet layers and inhibiting stacking of the graphene sheet layers, the nitrogen source is used for introducing nitrogen-doped defect sites into a graphene carbon skeleton, and the nano metal particles are used for constructing a graphene-metal conductive network; according to the invention, graphene and carbon nanotubes are reasonably proportioned, so that the carbon nanotubes play roles of bridges and pillars at the same time, effectively connect dispersed graphene sheet layers and inhibit stacking of the graphene sheet layers, and form a high-speed electron conduction channel penetrating through material particles, so that the internal resistance of the electrode is remarkably reduced, and the large-current charge-discharge capability of the negative electrode is greatly improved; the problem of poor conductivity caused by stacking of a traditional graphene negative electrode is solved.

The application discloses an analog bone conduction microphone, and relates to the technical field of electroacoustic conversion, which comprises a substrate circuit board, a shell, a metal gasket, a vibrator, an analog ASIC chip and a MEMS chip; the shell is connected to the substrate circuit board to form a containing cavity; the metal gasket is arranged in the containing cavity and has a first side face facing the substrate circuit board and a second side face facing away from the substrate circuit board, the metal gasket is provided with a conducting channel penetrating through the first side face and the second side face; the vibrator is arranged on the first side face and covers the conducting channel; the analog ASIC chip is arranged on the second side face; the MEMS chip is arranged on the second side face and opposite to the conducting channel; the MEMS chip receives the vibration signal transmitted by the vibrator through the conducting channel and converts the vibration signal into an electric signal and outputs the electric signal to the analog ASIC chip. The scheme can solve the problems of complex process, high manufacturing cost, and limited production yield and efficiency of the multilayer PCB stack packaging structure of the existing analog bone conduction microphone.

The invention relates to a heat exchanger system comprising a heat exchanger element (1) or multiple heat exchanger elements (1) which are fluidically connected to one another, wherein: each heat exchanger element (1) comprises fluid-conducting channels (4); a respective heat exchanger element (1) is formed by a stack of at least two overlapping film elements (2, 3); the film elements (2, 3) are formed from plastic material or plastic composite material, and all channels (4) of the heat exchanger element (1) are formed between two neighbouring film elements (2, 3), which are integrally connected in connection regions (5) and which surround the channels (4); the film elements lying on top of one another can be pulled apart from one another in the non-connected regions by the entering fluid, and the heat exchanger elements can be extended in the stacking direction of the stacked film elements.

The invention provides a sodium-ion battery electrolyte, a preparation method and a sodium-ion battery, and belongs to the technical field of sodium-ion batteries. The sodium-ion battery electrolyte comprises an electrolyte sodium salt, an organic solvent and a functional additive, the electrolyte sodium salt comprises sodium difluorophosphate and sodium bis (fluorosulfonyl) imide; the organic solvent comprises cyclic carbonate, a sulfonate solvent and fluoroether. According to the invention, sodium difluorophosphate and sodium bis (fluorosulfonyl) imide are adopted as electrolyte sodium salts, so that a stable sodium ion conduction channel can be provided in the charging and discharging process of the battery, the battery is ensured to have good ionic conductivity, the charging and discharging efficiency of the battery is improved, and the performance of the electrolyte is remarkably improved by adding the functional additive.

The application is suitable for the technical field of medical devices, and provides a device and a method for long-term in-vivo monitoring of fascia chamber pressure and temperature. The device comprises: an indwelling catheter having a hollow inner cavity constituting a pressure conducting channel; a pressure sensor in sealed communication with the pressure conducting channel, for monitoring the pressure in the fascia chamber; a temperature sensor fixed to the outer wall of the indwining catheter and physically isolated from the pressure conducting channel, for monitoring the tissue temperature in the fascia chamber; a main control module electrically connected with the pressure sensor and the temperature sensor, for receiving and processing pressure signals and temperature signals to generate monitoring data; and a transmission module for transmitting the monitoring data to a terminal device. The application physically isolates the temperature sensor from the pressure conducting channel, thereby ensuring the accuracy of pressure measurement, and improves the evaluation accuracy through joint determination of two parameters, and can realize remote centralized monitoring and improve the monitoring efficiency.

This invention relates to the field of batteries, specifically to an MXene composite modified material, a composite modified layer, a preparation method, and applications for enhancing the interface between a silicon anode and a solid electrolyte. The material comprises MXene sheets and inorganic solid lithium-ion conductive particles. The MXene sheets form a continuous electronic conductivity network, and the lithium-ion conductive particles fill the spaces between the MXene sheets to form ion conduction channels. This composite modified layer possesses a dual-conductivity network structure for both electrons and ions. It exhibits good electronic and ionic conductivity and sufficient flexibility to buffer volume changes in the silicon anode.

The invention relates to the technical field of radio frequency system packaging, in particular to a multi-channel radio frequency microsystem packaging framework and method considering heat dissipation and isolation. On one hand, electromagnetic shielding between channels of a sandwich structure is formed for the radio frequency power chips on the two sides through the metal shielding blocks, and on the other hand, the metal heat conduction blocks are loaded on the tops of the radio frequency power chips, and then the metal heat conduction blocks and the top heat sink of the whole system form upward directional heat conduction channels of the system through the shielding heat conduction and electric conduction adhesive. Finally, an integrated'shielding-heat dissipation 'system architecture is cooperatively constructed, a vertical short-path heat dissipation channel is established for a high-power gallium nitride radio frequency chip while high isolation between channels is realized, and the strict requirements of a high-integration radio frequency system on high isolation, strong heat dissipation and high reliability are met; the antenna can be widely applied to 5G communication base stations, phased array radar T / R assemblies, satellite navigation terminals and other scenes, and has the advantages of high reliability, compact structure and low cost.

A multiple gate system for realizing the quantum anomalous Hall effect, including a top channel electrode which controls carrier density and electric field in a conduction channel, a first dielectric layer for the top channel gate, a patterned contact gate electrode which controls earner density on the contact and screens the top channel electrode's electric field on the contact, and a second dielectric layer for the contact gate, an electrically tunable material comprising semiconducting molybdenum ditelluride in the form of a first atomic sheet and a second atomic sheet, wherein first atomic sheet is rotated planarly from the second atomic sheet by about 2.5 to about 5 degrees, to form a geometrically stacked homobilayer moiré superlattice configured to host ferromagnetic states that spontaneously break time-reversal symmetry, where a perpendicular electric field is applied to the electrically tunable material, tuning the quantum anomalous Hall effect.

The utility model relates to the technical field of detection equipment, and discloses sewage backwashing single-point fault detection equipment which comprises a water inlet pipe and detection equipment, the detection equipment comprises a pressure detection device, a flow detection device and a water quality detection device, one end of the water inlet pipe is fixedly connected with a backwashing sewage pipe, and the other end of the water inlet pipe is fixedly connected with a water outlet pipe. Firstly, clean water is pumped into the water inlet pipe through the water delivery pump and the water delivery pipe, in the process, water passes through the pressure conduction channel in the metal shell, the pressure sensitive element receives internal pressure, and the internal pressure is displayed through a numerical value on the pressure displayer. If the pressure is suddenly increased, the backwashing water possibly cannot smoothly pass through a sand filter layer in the filter of the sand filter tank, which possibly is that the backwashing water cannot be normally discharged or a water delivery pump breaks down due to the fact that the sand filter layer is excessively compacted and blocked, and the faults of the input end of the backwashing water and the sand filter layer can be detected.