41results about How to "Containment leak" patented technology

This application discloses an intelligent reflective surface and a covert communication system, belonging to the field of wireless communication technology. The intelligent reflective surface includes multiple intelligent reflective surface units arranged in an array; each intelligent reflective surface unit includes: a first substrate, a second substrate, and a third substrate; a metal patch and a varactor diode, located on the side of the third substrate opposite to the second substrate; the metal patch includes a first patch and a second patch, and the varactor diode is located between the first patch and the second patch, with its negative and positive terminals electrically connected to the first patch and the second patch, respectively; a metal ground plane, located between the first substrate and the second substrate; a first bias line and a second bias line, located on the side of the first substrate opposite to the second substrate; the first bias line is electrically connected to the metal ground plane and the first patch, respectively, and the second bias line is electrically connected to the second patch. This application can achieve precise control of electromagnetic waves, reduce electromagnetic energy loss, improve energy transmission efficiency, suppress electromagnetic wave leakage, and improve communication covertness.

The invention relates to the field of lithium ion batteries, and discloses a gel electrolyte, an in-situ curing electrolyte and a lithium ion battery. The gel electrolyte comprises a solvent, a polymer and a metal salt, wherein the polymer is a heterochain polymer with a main chain or a side chain containing a sulfur-containing siloxane group and a nitrogen-containing group. A main chain or a side chain of a polymer in the gel electrolyte contains a sulfur-containing siloxane group and a nitrogen-containing group, so that volatilization and leakage of a solvent can be inhibited, excellent liquid retention performance is brought, the thermal safety of a battery is improved, an interface side reaction can be inhibited, and the high-temperature and high-pressure stability of the battery is improved.

The utility model discloses a printed circuit board and an electronic product, and relates to the field of printed circuit boards, the printed circuit board comprises a first daughter board, the first daughter board is provided with a shielding hole and a signal hole which are coaxially distributed, the diameter of the signal hole is smaller than that of the shielding hole, so that an annular gap is formed between the shielding hole and the signal hole, and the first daughter board is provided with a second daughter board; a shielding filling layer and a first electroplated layer in contact with the shielding filling layer are arranged in the annular gap; the sintering layers are arranged on the upper end face and the lower end face of the first daughter board and used for achieving interconnection with the adjacent daughter boards. The double functions of electromagnetic shielding and signal transmission are achieved, the interconnection efficiency of the multilayer circuit board is effectively improved, the production cycle is shortened, the time and cost in a traditional layer-by-layer stacking process are effectively reduced, and the yield and production efficiency of products are improved.

This utility model discloses a multi-temperature zone cold chain distribution turnover box for goose products, belonging to the field of cold chain distribution technology. The turnover box includes a box body with anti-drop cushioning function. A fresh-keeping section is fixedly installed inside the hollow interior of the box body. The hollow interior of the fresh-keeping section is divided into several temperature-controlled zones based on several heat-insulating partitions. A vacuum layer for isolating heat conduction is provided between the inner wall of the box body and the fresh-keeping section. A box lid for sealing and protection is hinged to one side of the top of the box body. The heat-insulating partitions divide the fresh-keeping section into multiple independent temperature-controlled zones, and each zone can be managed according to the temperature control requirements of goose products. The vacuum layer design inside the box body isolates external heat conduction, completely blocking the intrusion of external environmental heat into the box body through conduction, convection and radiation. This solves the problem of temperature cross-contamination caused by the lack of zone management in traditional turnover boxes, and at the same time suppresses the leakage of cold energy through the thermal bridge effect of the box body seams or partitions.

The application discloses a siloxane grafted hyperbranched polyethylene and application thereof in preparation of a low-leakage paraffin-based heat-conducting phase change material. The application provides a siloxane grafted hyperbranched polyethylene, which is obtained by copolymerization of ethylene and vinyltriethoxysilane according to a 'chain walking' polymerization mechanism and catalyzed by a Pd-diimine catalyst. The application provides application of the siloxane grafted hyperbranched polyethylene in preparation of a low-leakage paraffin-based heat-conducting phase change material. The application synthesizes the siloxane grafted hyperbranched polyethylene with crosslinking characteristics, uses the same to be compounded with paraffin, and forms a three-dimensional network structure through subsequent crosslinking, thereby effectively restricting macroscopic flow of paraffin above a phase change temperature, and significantly improving shape stability and anti-leakage performance of the composite material. Meanwhile, flake graphite is introduced to construct an efficient heat-conducting path, and the overall heat-conducting coefficient of the material is improved.

The application provides a polarization management device and a closed-loop control method thereof. The polarization management device comprises: a polarization separation unit configured to receive an input optical signal and split the input optical signal into a first transverse electric mode optical component and a first transverse magnetic mode optical component; a polarization conversion unit configured to receive the first transverse magnetic mode optical component and convert the polarization state of the first transverse magnetic mode optical component to obtain a second transverse electric mode optical component; a first phase adjustment unit configured to perform first phase adjustment on the second transverse electric mode optical component to obtain a third transverse electric mode optical component; a second phase adjustment unit configured to receive the first transverse electric mode optical component and the third transverse electric mode optical component, perform second phase adjustment, and combine the first transverse electric mode optical component and the third transverse electric mode optical component to obtain a coupled optical signal; a sampling monitoring unit configured to sample the coupled optical signal to obtain a monitoring optical signal, split the monitoring optical signal into a fourth transverse electric mode optical component and a second transverse magnetic mode optical component; and a controller configured to adjust the working state of the first phase adjustment unit and / or the second phase adjustment unit based on the fourth transverse electric mode optical component and the second transverse magnetic mode optical component.

The invention provides a time-resolved fluorescence measurement method and system based on double-channel chopping modulation. The method comprises the following steps: respectively carrying out first chopping modulation and second chopping modulation on a first beam and a second beam of femtosecond pulse obtained by splitting source femtosecond pulse laser to obtain fluorescence excitation light carrying a first modulation frequency and gate pulse carrying a second modulation frequency, and exciting a sample to be detected by the fluorescence excitation light to radiate fluorescence as fluorescence seed light; after optical parametric amplification is carried out on the fluorescent seed light based on gate pulses, coupled fluorescence signals of amplified fluorescence, steady-state fluorescence and parametric fluorescence are collected, and Fourier transform is carried out according to fluorescence intensity information of the coupled fluorescence signals to obtain frequency spectrums at different wavelengths; wherein the sum frequency and the difference frequency of the first modulation frequency and the second modulation frequency in the frequency spectrum correspond to transient fluorescence, so that a transient fluorescence signal and a steady-state fluorescence background are separated in a frequency domain, and steady-state fluorescence background leakage in optical parametric fluorescence amplification measurement is efficiently inhibited.

The invention discloses preparation and application of a multicolor nano fluorescent probe based on fluorescent micromolecules FRET, belongs to the technical field of medical reagents, and particularly relates to a preparation method of the nano fluorescent probe. Then adding an organic reagent and a siloxane precursor to prepare an organic phase solution, adding the organic phase solution into an alkaline water phase system to form nano particles, and finally coating the outer layer with silicon dioxide to prepare the nano fluorescent probe. The use volume ratio of the donor fluorescent small molecule solution to the receptor fluorescent small molecule solution is (0.5-1): (0-25). According to the invention, donor fluorescent micromolecules are HMAT blue fluorescent micromolecules, and receptor fluorescent micromolecules comprise BODIPY488 or Nile red.

The application belongs to the technical field of LED semiconductors, and more particularly relates to a GAN-based Micro LED epitaxial wafer containing a multi-element aluminum-nitrogen composite electron balance layer and a preparation method thereof.The application comprises, from bottom to top, a substrate, a low-temperature buffer layer, an undoped GaN layer, an N-type GaN layer, a composite electron balance layer, a multi-quantum well light-emitting layer, and a P-type GaN layer; the composite electron balance layer is composed of any two material layers selected from ScAlN, YAlN, and InAlN and an AlGaN layer, which are alternately stacked.The application adds the ScAlN / YAlN / InAlN-AlGaN alternately stacked composite electron balance layer between the N-type GaN layer and the multi-quantum well light-emitting layer, so as to achieve the effects of improving the light-emitting power of the Micro LED, reducing non-radiative recombination, enhancing the static resistance of the device, and improving the stability of large-current operation.

Provided is a gas treatment system that can accurately detect internal leakage in a three-way valve and can suppress leakage of exhaust gas to a bypass line. A gas treatment system 10 includes: a main exhaust line 22 for guiding exhaust gas to a detoxification apparatus 40; a bypass line 30 for guiding the exhaust gas to an emergency detoxification apparatus 50; an upstream exhaust line 21; and a three-way valve 23 capable of switching a flow of the exhaust gas from the upstream exhaust line 21 to the main exhaust line 22 or the bypass line 30, in which the bypass line 30 includes: a gate valve 33; a gas introduction pipe 34 through which a second gas is introduced; and a pressure gauge 35 configured to detect pressure. If the three-way valve 23 discharges gas to the main exhaust line 22, in a state where the second gas has been introduced into a closed flow path C between the gate valve 33 and the three-way valve 23 from the gas introduction pipe 34, internal leakage in the three-way valve 23 is detectable using change in the pressure detected by the pressure gauge 35.

This invention provides an asymmetrical tilting duct, belonging to the field of aircraft technology, including a duct shell. The duct shell is a non-closed arc structure along the circumferential direction, and the duct shell has a non-closed opening section on its circumference. The cross-section of the opening section is an airfoil with inverted upper and lower arcs. By designing the duct shell as a non-closed arc structure and setting a non-closed opening section with an inverted airfoil cross-section on its circumference, this invention breaks the symmetrical distribution of circumferential air pressure in the duct, forming a circumferential pressure difference that cannot be completely offset. This allows the duct to generate additional radial lift along the vertical direction of the fuselage while providing axial thrust, effectively offsetting part of the wing load and improving the aircraft's payload ratio.

Provided is an integrated and compact fluid control valve that corresponds to different fluid pressures, controls fluid at high speed with high accuracy in the case of low-pressure fluid flow, also exhibits high sealing force at the time of valve closure in the case of high-pressure fluid flow to reliably prevent leakage, can suppress a decrease in sealing performance to improve durability, and at the same time, can suppress the consumption of compressed air for driving while flowing fluid with a stable Cv value to prevent changes in flow rate. The divided pistons (23) are arranged in series with respect to the valve seat (13) in a resilient state by a plurality of spring members (24) that differ in spring load, an air supply port (25) is formed in the actuator (11), each piston is independently raised and lowered in the actuator with a predetermined stroke (Y1, Y2) by the compressed air from each air supply port or the resilient force of each spring member, and the valve body can be provided to seal the flow path with different sealing forces corresponding to the lowered state of each piston.

The utility model discloses a kind of hot-pressing double inductors of reducing EMI, by E-type magnetic core, C-type magnetic core and integrally-formed double-hook type coil combination forming, the E-type magnetic core main body is formed as flat square block, and the surface of E-type magnetic core is formed with the special-shaped groove suitable for double-hook type coil compatible therein, the C-type magnetic core is formed as the square block cover body with bottom gap cavity, and the gap cavity is adapted to connect E-type magnetic core, three parts are assembled and hot-pressed into encapsulation, and double-hook type coil is set as four electrode pads in the bottom of encapsulation. The present hot-pressing double inductor can effectively save the space occupied in PCB, while the double inductors cancel each other's magnetic force lines, effectively suppress the inductance EMI leakage, improve the performance of inductor device, further improve the operating environment of circuit.

The application relates to a deep ultraviolet light emitting diode device structure and a preparation method for realizing hole acceleration, belonging to the field of semiconductor photodiodes, and comprising a substrate, a buffer layer and an n-type semiconductor electron injection layer from bottom to top; a plurality of quantum well active regions, a p-type AlGaN electron blocking layer, a p-type AlGaN insertion layer, an n-type AlGaN insertion layer, a p-type semiconductor hole injection layer, a p-type contact layer and a p-type electrode are sequentially arranged above one side of the n-type semiconductor electron injection layer; and an n-type electrode is arranged above the other side; the Al component percentage of the p-type AlGaN insertion layer and the n-type AlGaN insertion layer is higher than that of the p-type AlGaN hole injection layer and lower than that of the p-type AlGaN electron blocking layer. The application introduces the insertion layer, can improve the kinetic energy of holes, increases the injection of holes, optimizes the Al component of the structure, reduces the valence band offset between the electron blocking layer and the hole injection layer, and weakens the hole blocking effect.

The application provides a hierarchical structure heat management fiber film integrated with a phase change core layer and a burr skin layer and a preparation method thereof, and the hierarchical structure heat management fiber film comprises the phase change core layer and the burr skin layer wrapped outside the phase change core layer, wherein the burr skin layer comprises PAN fibers and ZnO nanorods grown on the surfaces of the PAN fibers, and the phase change core layer comprises a PVDF hydrophobic sacrificial framework and PEG phase change materials carried on the PVDF hydrophobic sacrificial framework. By constructing a rough burr skin layer with a diffuse reflection characteristic, the risk of rupture of a smooth core-shell structure in a thermal cycle is avoided, and efficient cooperation of radiation heat dissipation and latent heat buffering is achieved.

The invention relates to the technical field of carbon dioxide adsorbents, in particular to an SBA-15 solid amine adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, carrying out vacuum drying activation on the SBA-15 carrier; s2, preparing a composite impregnation liquid: dissolving organic amine and PEG-200 in absolute ethyl alcohol together, and fully stirring to form a uniform and transparent solution; s3, adding an activated SBA-15 carrier into the composite impregnation liquid, and carrying out impregnation and aging treatment; and S4, carrying out gradient drying and curing on the impregnated and aged product to obtain the SBA-15 solid amine adsorbent. Polyethylene glycol (PEG) with a specific molecular weight is introduced as a functional additive to synergistically optimize an impregnation solvent and amine loading capacity, so that the dispersion state of amine is improved on the molecular level and the anchoring effect of the amine is enhanced, and the adsorption capacity, dynamics and stability are synergistically improved.

The embodiment of the invention provides an elastic wave device and an electronic product. The elastic wave device comprises a piezoelectric layer; the IDT electrode layer is arranged on the piezoelectric layer, the IDT electrode layer comprises a first bus bar and a second bus bar which are oppositely arranged along a first direction, and a part between the first bus bar and the second bus bar is defined as an interdigital region; the electrode fingers are arranged in the interdigital area, the electrode fingers comprise a plurality of first electrode fingers and a plurality of second electrode fingers which are arranged at intervals in the second direction, first intervals are formed between the first electrode fingers and the second bus bars, and first intervals are formed between the second electrode fingers and the first bus bars; the interdigital area comprises a central area and additional film areas, the two edges of the central area in the first direction do not exceed the edges of the sides, away from the bus bar, of the first electrode fingers and the second electrode fingers, and the additional film areas are arranged on the two sides of the central area; and the additional film is arranged on the piezoelectric substrate, the additional film is arranged in the additional film area, and the material of the additional film is silicon dioxide, silicon oxide, silicon nitride, HfO2, silicon, resin, PI or titanium oxide.

Disclosed is a polishing pad including a polishing layer having a circular polishing surface, wherein the polishing pad is provided with a spiral groove or concentric grooves including a plurality of annular grooves arranged concentrically, the spiral groove and the concentric grooves being disposed spanning from a central region to a peripheral edge region of the polishing surface, and radial grooves including line segment-shaped grooves extending from the central region toward the peripheral edge region. The line segment-shaped grooves have a first end portion in a radial groove at a distance of 5 to 10% of the radius of the polishing surface from a center of the radial grooves, and a second end portion in a region at a distance of 35 to 70% of the radius of the polishing surface from the center of the radial grooves, and the line segment-shaped grooves have an average length of 30 to 65% of the radius of the polishing surface. A cross-sectional area Sa (mm2) of the line segment-shaped grooves and a cross-sectional area Sb (mm2) of the spiral groove or the concentric grooves satisfy 0.1 ≤ Sb / Sa < 1.0.

[Problem] Provided is an assembled paper container capable of suppressing leakage of contained matter or seepage of contained matter from a container section of a container main body. [Solution] An assembled paper container 1 includes a container main body 11 including a container section 12, and a resin film 3 covered over an inner surface of the container main body 11. The container main body 11 includes a bottom surface 121, a plurality of side surfaces 122, and a flange section 13. The flange section 13 has a top surface 131 provided with a step 22 extending outward from the container section 12 side, and the step 22 is generated by bonding fold-back pieces 13a, 13b together so as to be mutually overlapped after the assembly. The resin film 3 has a protruding section 31 traversing the step 22 above the step 22 in a part covered with the top surface 131 of the flange section 13 of the container main body 11.

A display device is provided. The display device includes: a substrate, a plurality of light-emitting diodes disposed on the substrate, an encapsulation member disposed on the plurality of light-emitting diodes, an interlayer insulating layer disposed on the encapsulation member and having a trench structure on its top surface, a barrier layer disposed on the interlayer insulating layer along the trench structure, and a plurality of optical members covering the ends of the barrier layer and configured to overlap with the plurality of light-emitting diodes.

The application provides a stress release layer, a preparation method thereof, an epitaxial wafer and an LED chip. The stress release layer comprises a superlattice structure formed by periodically laminating first sublayers and second sublayers. The first sublayer comprises an InGaN layer, and the first sublayer is a non-intentionally doped layer. The second sublayer comprises a GaN layer, and the GaN layer is doped with Zn. The application solves the problem that the traditional stress release layer cannot improve the low hole injection efficiency and uneven distribution, the low hole mobility in GaN, and the difficulty in uniformly injecting holes into multiple quantum wells, and the problem that the quantum well close to the P side is overloaded, thereby limiting the overall luminous efficiency.

The invention relates to a gel electrolyte material based on a zwitter-ion covalent organic framework and a preparation method of the gel electrolyte material. The invention discloses a preparation method of a gel electrolyte material based on a zwitter-ion covalent organic framework. The preparation method comprises the following steps: (1) preparing a nanoscale film substrate from a chain alkane polymer by adopting electrostatic spinning; (2) immersing the nanoscale film substrate into a reaction solution containing a COF precursor, and carrying out an in-situ polymerization reaction to obtain a composite film material; (3) dispersing the composite film material in acetonitrile, adding sultone monomers in the presence of argon at room temperature, and carrying out nucleophilic ring-opening reaction to obtain a functional film material; and (4) placing the functionalized film material in an organic electrolyte solution containing lithium salt, and obtaining the gel electrolyte material through physical swelling action. According to the zwitter-ion covalent organic framework-based gel electrolyte material and the preparation method thereof disclosed by the invention, the problems of low ion conduction efficiency, poor interface stability and the like of the existing electrolyte are solved.

This invention discloses a method and apparatus for detecting interharmonics in a power system. The method includes: preprocessing discrete sampled signals with full-phase data to obtain full-phase data; performing a fast Fourier transform on the full-phase data to obtain a full-phase amplitude spectrum and a phase spectrum; combining the full-phase amplitude spectrum and phase spectrum to identify the existence of dense spectrum and obtain peak spectral line values; using a full-phase spectral line correction method to obtain interharmonic parameters; obtaining constraint conditions based on the obtained interharmonic parameters; and using a least-squares fitting method with constraint conditions to obtain accurate values ​​of the interharmonic parameters. This invention can effectively determine the existence of dense spectrum, even for dense spectrum with very small frequency intervals; it can effectively suppress spectral leakage, significantly reducing the interference caused by spectral leakage of the fundamental frequency and harmonics to interharmonic detection, and also reducing interference between interharmonics in dense spectrum; this invention also has strong noise resistance.

The present invention relates to a hot runner mold and a resin-made container manufacturing apparatus. The hot runner mold includes a hot runner mold main body portion fixed to a fixing plate and supplying molten resin received from a resin inlet to an injection mold; a nozzle receiving portion obliquely arranged from a position orthogonal to the resin inlet of the hot runner mold main body portion and coaxially connected to a nozzle of an injection device supplying the molten resin; a relay portion having a resin flow path with a bent portion inside and guiding the molten resin from the nozzle receiving portion to the resin inlet; and a restriction portion fixed to the fixing plate and restricting movement of the nozzle receiving portion or the relay portion relative to the hot runner mold main body portion.

The application relates to the technical field of power equipment, and discloses a moisture-proof mechanism of an environment-friendly polypropylene insulation medium-voltage power cable and a use method, which comprises an inner supporting piece, a plurality of electric cores arranged in the inner supporting piece, a detection signaling mechanism arranged in the inner supporting piece, a plurality of groups of the detection signaling mechanism, and a supporting mechanism arranged on the side wall of the inner supporting piece and located between the side wall of the inner supporting piece and the inside of an external protection mechanism. When the power cable is corroded and damaged and water enters, the two ends of the conductive part in the movable plate contact the connecting end of one end of the power supply and the connecting end of one end of the signal generator, so that the power supply and the signal generator are connected in communication through the conductive part, the signal generator operates, and a signal is sent, so as to remind the maintenance personnel that the power cable in the section has problems such as serious corrosion and water entering.

The invention discloses a hydrogel-based composite film integrating efficient phase change cooling, high thermal conductivity, electromagnetic shielding and leakage prevention and a preparation method of the hydrogel-based composite film. The thin film is of a double-layer composite structure, wherein the lower layer is a high-thermal-conductivity electromagnetic shielding layer composed of polyacrylamide (PAM) hydrogel, Si3N4 and electromagnetic shielding filler, and the upper layer is a phase-change leakage-proof layer composed of PAM hydrogel and polyethylene glycol (PEG); the upper layer and the lower layer form a stable integrated structure through the synergistic effect of interface hydrogen bonds and physical entanglement, and finally integration of thermal management and electromagnetic protection functions is achieved. The phase change latent heat of the prepared film is larger than or equal to 120 J / g, the X-band electromagnetic shielding effectiveness (SE) is larger than or equal to 32 dB, and leakage is avoided at the high temperature of 80 DEG C. The preparation process is simple, and the product can be applied to various scenes such as power chips, LED equipment and wearable electronic devices.

The application discloses a pet water dispenser, which belongs to the technical field of water drinking devices and comprises a base assembly and a water tank assembly. The base assembly comprises a sterilization part, and the water tank assembly is arranged on the base assembly. The water tank assembly comprises a water storage part and a water conveying part. The water storage part is in communication with the water conveying part, and the water conveying part is provided with a light shielding structure for shielding the sterilization part. The base assembly and the water tank assembly are physically isolated without direct electrical connection, so that water and electricity are separated. The sterilization part projects light to the water conveying part. The light shielding structure forms shielding on the light propagation path, thereby forming a dynamic water flow concentrated sterilization area. Part of the water flow is circulated back to realize multiple rounds of treatment, so that the unit light intensity and the sterilization efficiency are improved. The light shielding structure in the water conveying part maintains water permeability and constructs an optical closed space, thereby inhibiting light leakage to the external environment and reducing the risk of electric leakage and light pollution.

A shed (1) includes: a ceiling member in which a plurality of solar cell modules are arranged in a first direction and in a second direction intersecting the first direction; and a first cross member (13) provided in a first direction and inclined in the first direction. The first cross beam (13) is provided with a plurality of cross beam members (20) and a connecting member (30), said cross beam members (20) comprising: a columnar section (22) in which a hollow section (21) is formed in the longitudinal direction; a pair of side walls (23) provided in the longitudinal direction at the edge of the upper surface of the columnar section (22) in the width direction; and a connecting member (30) that connects adjacent cross member members (20) to each other by fitting into the hollow portion (21) of the cross member members (20). A recessed portion 40 is formed by the upper surface of the columnar portion 22 and the pair of side walls 23, and raised portions are provided at both ends in the width direction of the upper surface 311 of the connecting member 30 so as to cover the longitudinal direction of the connecting member 30, the raised portions being configured so as to be higher than the lowest position of the upper surface 311 of the connecting member 30. By the adoption of the shed, under the condition that the cross beam is composed of a plurality of components, rainwater and the like can be effectively prevented from leaking between the adjacent components without conducting waterproof treatment on the connecting positions.