86results about How to "Containment leak" patented technology

The invention relates to a composite phase-change film based on liquid metal and PBO fiber and a preparation method thereof, and belongs to the technical field of phase-change material preparation, and the preparation method comprises the following steps: the composite phase-change film comprises a poly (p-phenylbenzobisoxazole) fiber (PBO) base material, a phase-change material and a heat-conducting filler, the phase-change material is composed of phase-change microcapsules (PM) which are prepared by taking polyurethane (PU) as a wall material and organic solid-liquid phase-change materials (OPCMs) as a core material through a Pickering emulsion polymerization method. The prepared PM has a core-shell structure, and leakage of OPCMs is effectively prevented. The PM and the PBO fiber network are combined, so that the dual packaging of the OPCMs is realized, and the leakage of the OPCMs is further prevented. Meanwhile, dispersion and interaction of the OPCMs in a PBO matrix are optimized, and formation of a network structure with a limited domain is promoted. The composite phase change film prepared by the invention has relatively high mechanical properties, remarkable heat conductivity, excellent and stable flexibility and excellent heat storage capacity.

The invention provides a frequency mixer and signal transmission equipment, and belongs to the technical field of communication. In the scheme provided by the invention, the mixer can transmit the local oscillator signal through the slot line, and transmit the first signal, the second signal and the third signal through the microstrip line. Therefore, it can be ensured that the transmission mode of the local oscillator signal is different from the transmission mode of the first signal and is different from the transmission modes of the second signal and the third signal, that is, the transmission mode isolation of the local oscillator signal from the first signal and the transmission mode isolation of the local oscillator signal from the second signal and the third signal can be realized. The transmission modes of the local oscillator signal and other signals are isolated, so that the leakage of the local oscillator signal at other signal ports can be effectively reduced, and the performance of the mixer is effectively improved.

A composite structure hollow anti-resonance optical fiber disclosed by the present invention comprises an outer cladding layer, a doping layer and an anti-resonance layer which are sequentially arranged from outside to inside, the anti-resonance layer comprises a plurality of glass nested combination tubes which are uniformly distributed along the circumferential direction, are tangent to the doping layer and are arranged at intervals, and the plurality of glass nested combination tubes surround to form an air fiber core. The glass nested combined pipe comprises an outer nested pipe of a circular structure and an inner nested pipe of an oval structure arranged in the outer nested pipe. The short half axis of the inner nested pipe is arranged in the radial direction of the optical fiber, and the outer ring, away from the air fiber core, of the inner nested pipe is tangent to the inner ring, away from the air fiber core, of the outer nested pipe. According to the invention, a multi-layer nested structure is adopted, and the anti-resonance effect is optimized through the cooperation of the doping layer and the anti-resonance layer with a special structure.

The invention relates to the technical field of specimen storage boxes, and discloses a storage device for blood collection tube transfer, which comprises a storage box, a supporting plate is fixedly mounted on the inner wall of the storage box, the supporting plate divides the storage box into an upper part and a lower part, the upper part is a positive pressure cavity, the lower part is a negative pressure cavity, and an air exhaust assembly is arranged in the negative pressure cavity. Spacing plates are fixed to the top of the supporting plate in an array mode, and side face clamping pieces are arranged on the two sides of each spacing plate. Air in the negative pressure cavity is sucked through the air pump, and the base is adsorbed to the adsorption holes through the negative pressure effect; when the air pressure in the piston cavity is gradually reduced, the sliding piston moves downwards, and the clamping rod is attached to the side face of the blood collection tube, so that the purpose of clamping and fixing the blood collection tube is achieved, and the blood collection tube is prevented from shaking and colliding in the transferring process; and blood in the blood collection tube is prevented from leaking from a gap between the blood collection tube and the tube cap.

The invention provides a high-thermal-conductivity phase change thermal interface material and a preparation method thereof, and belongs to the field of phase change thermal interface materials, the high-thermal-conductivity phase change thermal interface material comprises the following raw materials by mass: 11.4 parts of epoxy resin, 19 parts of a curing agent, 7.6 parts of dioctyl terephthalate, 59.5-62 parts of phase change particles, and 0-2.5 parts of expanded graphite. According to the high-thermal-conductivity phase change thermal interface material, the phase change particles and the expanded graphite are completely wrapped in the flexible epoxy resin, so that the flexible epoxy resin is endowed with relatively high phase change latent heat and excellent thermal conductivity, and meanwhile, leakage of the phase change material can be effectively inhibited. The preparation technology is simple, the preparation cost is low, good economical efficiency is achieved, and the preparation method is suitable for industrial production.

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 invention discloses a small-size vertical pixel structure and an image sensor. The small-size vertical pixel structure is manufactured based on a P-type silicon substrate, a transmission gate TG is located above a PD region, the PD region adopts an L-type structure, and the PD region is composed of a PDN and a DPDN; the transmission gate TG and the PDN region are separated by a PDP layer; the PDP, the PDN and the DPDN under the transmission gate TG are all subjected to pre-gate ion implantation; the PD region is formed by injecting N-type ions with different concentrations for multiple times, and the PDP layer is formed by injecting P-type ions with different concentrations; extra N-type ion implantation DPDN-NU is carried out on the DPDN area, non-uniform doping is carried out on the DPDN area, and a transverse electric field is formed. An L-shaped PD structure is adopted, a transverse electric field is formed, and electron transfer is accelerated; pDP layer injection is added, and the problem of charge leakage of a PD area and an FD node in a vertical pixel structure is solved.

A method and apparatus for inserting a pseudo sequence during data modulation in a communication system according to a channel state and a link state, etc. are disclosed. In an embodiment, a method for data modulation by a wireless communication node of a wireless communication system includes: inserting at least one first pseudo sequence into a first data sequence in a first data block; and inserting at least one second pseudo sequence into a second data sequence in a second data block; wherein a first length of the first pseudo sequence is different from a second length of the second pseudo sequence, and wherein the second pseudo sequence includes the first pseudo sequence or is included in the first pseudo sequence.

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.

The invention relates to an interdigital transducer, an acoustic resonator and electronic equipment. The interdigital transducer includes: a first bus bar and a second bus bar; the interdigital electrode comprises a plurality of first electrode fingers and a plurality of second electrode fingers, the first electrode fingers and the second electrode fingers are located between the first bus bar and the second bus bar, and the first electrode fingers and the second electrode fingers are oppositely arranged in the first direction in a one-to-one correspondence mode; an edge area, a spacing area, an inclined area and a central area which are arranged in the first direction are arranged between the first bus bar and the second bus bar, the inclined area is located between the central area and the spacing area, the spacing area is located between the inclined area and the edge area, and the central area is located on the side, away from the spacing area, of the inclined area; the portion, located in the inclined area, of the second electrode finger comprises a first section, a second section and a third section which are sequentially connected in the first direction, and the first section, the second section and the third section are obliquely arranged relative to the first direction.

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 invention discloses a wet compression centrifugal compressor and an air inlet compression control method.The compressor comprises an impeller and an impeller cover, an air inlet flow channel is formed between the impeller cover and the impeller, water spraying holes used for spraying liquid into the air inlet flow channel for cooling are formed in the impeller cover in the air inlet flowing direction, and the water spraying holes are evenly distributed in the surface of the impeller cover; a spray head is correspondingly arranged in each water spray hole, each spray head is communicated with a water quantity server through a pipeline, a regulating valve used for controlling the water spray quantity is independently connected to the communication position, and the water spray quantity at the water spray holes is controlled through the water quantity server; the air inlet channel is arranged in the air flow direction; the main vaporization water spraying holes and the supplementary vaporization water spraying holes are formed in the wheel cover, the water spraying amount can be flexibly adjusted, it is guaranteed that air in a gas compression channel is close to saturated wet air, the wheel cover is suitable for an inverter compressor, and the power saving amount cannot be obviously reduced along with the change of the operation working condition of the compressor.

The present disclosure relates to a semiconductor memory device. Embodiments provide a memory capable of reducing a cell size. A memory according to an embodiment includes a laminate including first conductive films and first insulating films alternately laminated in a first direction. The first columnar body includes a first semiconductor portion, a first insulator portion, a second insulator portion, a third insulator portion, and a fourth insulator portion extending in a first direction in the stacked body. The second insulator portion includes: a first portion provided between the first insulator portion and the first conductive film; and a second portion provided between the first insulator portion and the first insulating film, the second portion having a thickness smaller than that of the first portion in a second direction orthogonal to the first direction. The plurality of first insulating films are laminated films of a second insulating film and a third insulating film or are formed by the third insulating film.

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 present invention relates to a method for manufacturing a lithium secondary battery and a lithium secondary battery, the method comprising: a first step of manufacturing a cell by disposing an electrode assembly in a battery case and injecting an electrolyte; and a second step of performing at least three pre-cycles on the cell.

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.

The present application discloses an image processing method and related device for multi-directional edge texture filtering, which are used to improve the accuracy and robustness of edge detection. The present application method includes: obtaining a captured image of a display screen to be detected, and performing corner correction on the captured image to obtain a standard image; generating a target weight sequence based on a filtering step size parameter and a sine function, and selectively reversing the target weight sequence according to an input polarity parameter, the polarity parameter is used to control the edge detection direction, and the edge detection direction includes positive polarity edge detection, negative polarity edge detection, and bipolar edge detection; constructing a target convolution kernel according to the input direction parameter, polarity parameter, and target weight sequence, the direction parameter is used to control the filtering direction, and the filtering direction includes column direction filtering, row direction filtering, and multi-directional filtering; performing a convolution operation on the standard image based on the target convolution kernel, and integrating the output image according to the polarity parameter and the direction parameter to obtain the target image.

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.

The invention provides a GaN-based semiconductor laser chip with a kink-inhibiting upper waveguide layer. The GaN-based semiconductor laser chip comprises a substrate, a lower coating layer, a lower waveguide layer, an active layer, an upper waveguide layer, an electron blocking layer and an upper coating layer which are sequentially arranged from bottom to top. By designing the refractive index coefficient of the upper waveguide layer, the descending angle of the peak position of hole mobility in the direction of the upper coating layer and the ascending angle of the valley position in the direction of the active layer, the carrier limiting effect of the upper waveguide layer is enhanced, the leakage of electrons to one side of the upper waveguide layer is reduced, the permeation and expansion of carriers to a passive region are inhibited, and the performance of the device is improved. The radiation mode shape distortion is inhibited, the radiation recombination loss is reduced, the radiation recombination efficiency and the external differential component efficiency of a fundamental mode are improved, the threshold current density and the kink critical current are reduced, and the slope efficiency and the optical power of the laser are improved.

The invention relates to an IQ imbalance estimation value obtaining method based on single-tone detection, and the method comprises the steps: receiving a fixed-frequency single-tone signal through a zero-intermediate-frequency receiver, and obtaining the basic parameters of the fixed-frequency single-tone signal; performing first processing on the fixed-frequency single-tone signal to obtain a corresponding digital baseband single-tone signal; performing second processing on the digital baseband single-tone signal to obtain the digital baseband single-tone signal after compensation of the received direct current bias; performing truncation processing on the digital baseband single-tone signal after compensation of the received direct current bias to obtain a truncated digital baseband single-tone signal; and obtaining I-path and Q-path frequency domain signals of the truncated digital baseband single-tone signal according to the truncated digital baseband single-tone signal, and obtaining an IQ phase imbalance estimated value and an IQ amplitude imbalance estimated value according to the I-path and Q-path frequency domain signals. The method provided by the invention solves the problems of low accuracy and high complexity of the IQ imbalance estimation value in the prior art.

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.

The invention relates to a printed circuit board and a manufacturing method thereof. A printed wiring board according to the present invention is configured to include: a substrate including first to n-th layers stacked in a layered shape; a via hole formed through a layer including the first layer or the nth layer in a stacking direction; plating layers formed inside and outside the via holes; and a pad formed by separating the plating layer formed at the end of the via hole from the periphery. Consequently, the conduction path can be formed on one side of the bonding pad in the stacking direction to improve the component density, and thus the size of the substrate can be reduced.

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 invention provides a fluorescent X-ray analyzer and a power supply device. The X-ray fluorescence analyzer is provided with: an X-ray bulb that irradiates primary X-rays; a first power supply for supplying a filament current; a second power supply that applies a tube voltage; a first diode connected to the power line; a Zener diode connected to the ground terminal; and an operational amplifier having an output terminal, an inverting input terminal, and a non-inverting input terminal. The non-inverting input terminal is connected to the power line, and the output terminal is connected to the second terminal and the inverting input terminal.

The gallium nitride-based semiconductor laser chip sequentially comprises a substrate, a lower limiting layer, a lower waveguide layer, an active layer, an upper waveguide layer and an upper limiting layer from bottom to top, a vortex topological charge modulation layer is arranged between the lower waveguide layer and the lower limiting layer, and the thickness of the vortex topological charge modulation layer is 0.5-500 nm. By controlling the azimuth gradient of the interface phase, the vortex topological charge is amplified, the purity of the topological charge is improved, a light-substance-polarized laser mixed coupling interface is formed, full-angle birefringence modulation of coherent phonon ultrafast optics is induced, nonlinear optics is changed, photons are captured, the lens effect is generated, light field dispersion is restrained, and the polarization effect is improved. Therefore, the substrate mode leakage is inhibited, and the far-field FFP image quality is improved.