41results about How to "Limit expansion" patented technology

The invention provides a method for improving the gas separation performance of a supported MOF membrane by utilizing a polymer coating, wherein the surface of the MOF membrane is coated with the polymer coating, and the defect of the MOF membrane can be repaired. At the same time, coating of the polymer coating can effectively prevent the flexibility of MOF skeleton and limit the expansion of itspore size, so as to effectively improve the gas separation performance. In addition, the hydrothermal stability of the MOF membrane can be greatly improved by externally coating of the polymer coating, and the brittleness of the MOF membrane can be effectively protected by the coatings. The method for repairing the MOF membrane by using the polymer coating has wide application value in the fieldof gas separation.

The invention relates to the technical field of display, in particular to a flexible display panel and a preparation method thereof. The problems of inaccurate alignment of COF bonding and FOF bondingand low yield caused by the size inhomogeneity of flexible substrate are solved. An embodiment of the present invention provides a method for manufacturing a flexible display panel, the flexible display panel comprising a display region and a bonding region, and the bonding region comprises at least two COF bonding regions. The method comprises the steps of: preparing a flexible substrate; Forming pixel units arranged in an array form on a surface of a corresponding display region of the flexible substrate; Cutting a position between at least two adjacent COF bonding regions to form a strip-like crack or hollow area, separating the at least two adjacent COF bonding regions and separating the at least two adjacent COF bonding regions structurally; affixing a back film and cutting off the back film at a position corresponding to the strip-shaped crack or the hollow area; Bonding of COF and FOF. The present invention is used to preparing the flexible display panel.

The invention discloses an efficient special fiber anti-cracking agent and a preparation method thereof. According to the special fiber anti-cracking agent, a hydration heat inhibition type swelling agent and fibers are compounded to use and a superimposed effect of the two components is sufficiently expressed, so that temperature shrinkage and drying shrinkage in a concrete hydration and hardening process are effectively reduced and the anti-cracking performance of concrete is improved.

The invention discloses a composition based on stem cells and application thereof in preparing preparation for the coronary heart disease. The composition based on the stem cells includes the stem cells prepared through an optimizing method and cell preserving liquid serving as a solvent. Firstly, proper stem cells are selected; secondly, the selected stem cells are further processed through the optimizing method; lastly, the stem cells are collected and resuspended in the cell preserving liquid. A various cell implanting method is adopted in the application of the composition based on the stem cells in preparing the preparation for the coronary heart disease, the time nodes before an operation, during the operation and after the operation are combined, and it is ensured that the transplanted stem cells can give the full play. The optimizing method is used for preparing the stem cells and the stem cell composition in the cell preserving liquid, the ventricle function can be extremely obviously enhanced after cell transplantation, and the left ventricle reconstitution is restrained. The optimal cell composition is provided for treating the coronary heart disease, the source is wide, preparation is simple, toxic and side effects are avoided, and the transplanting effect is good.

The invention relates to the technical field of three-dimensional electro-deposition, in particular to a high-locality three-dimensional electro-deposition device. The high-locality three-dimensional electro-deposition device comprises a base, a three-degree-of-freedom movement mechanism, a liquid pool, a clamp, a nozzle, a liquid supply pipe and an anode material; the three-degree-of-freedom movement mechanism is arranged on the base, the nozzle, the liquid supply pipe and the anode material are connected and communicated through a three-way adapter, the three-way adapter is connected with the three-degree-of-freedom movement mechanism through the clamp, the liquid pool is arranged on the base and located below the nozzle, and the liquid pool is filled with high-density insoluble insulating liquid. According to the three-dimensional electro-deposition device, stray deposition of electroplating liquid on an cathode substrate is effectively avoided, and the locality of three-dimensional electro-deposition is improved.

The invention relates to an inflatable film obstetric apparatus, belonging to the field of medical equipment. The inflatable film obstetric apparatus is characterized by comprising a casing and a control host, wherein the casing is a cylindrical sleeve which is composed of two layers of films and has two open ends, and a sealed inflation space is formed between the two layers of films. The inflatable film obstetric apparatus abandons the structure that a support arm of an original support rod is pushed open, the two layers of films are inflated by gas so as to wrap the head of a fetus, and the fetus is pulled out through the casing. The inflation volume and deflation volume are controlled by a control system and an inflation pump according to production processes; the structure of the inflatable film obstetric apparatus is reasonable; when the inflatable film obstetric apparatus is used, the fetus can not be injured; and the operation is very simple, the pain of a pregnant woman caused by delivery is reduced while the delivery process is accelerated, and thus the fetus is prevented from being injured in the delivery process. More than two one-way air supply valves are arranged on an inside film at the inner end, the one-way air supply valves only can supply air to the outside of the inflation space, and the one-way air supply valves directly correspond to the mouth and nose of the fetus, thereby ensuring the oxygen supply of the fetus and reducing the danger coefficient in delivery.

The invention discloses a preparation method of a baloxavir key intermediate and the intermediate thereof. The method includes subjecting 3,4-difluoro-2-methyl benzaldehyde shown as a formula (I) as araw material to a bromination reaction to obtain 3,4-difluoro-2-bromomethyl benzaldehyde shown in a formula (II), carrying out a substitution reaction to obtain 3,4-difluoro-2-(((2-bromophenyl) thio)methyl)-benzaldehyde shown in a formula (III), and finally, carrying out a nucleophilic addition reaction to synthesize a target product, namely 7,8-difluorodibenzo[b, e]thiepin-11(6H)-ol shown in aformula (IV). The specific reaction process is shown in the specification. According to the method, 2-bromothiophenol is used for replacing foul and virulent thiophenol, the reaction steps are reducedto three steps, and the preparation method is high in yield, low in cost, environmentally friendly and easy to operate.

The invention provides a nylon sheath material for wires and cables. The nylon sheath material comprises the following components in parts by weight: 100 parts of nylon resin, 10-50 parts of a modifier, 0.6-2 parts of a lubricant, and 1.2-2.0 parts of an anti-oxidant. The invention further provides a preparation method of the nylon sheath material for wires and cables. The nylon sheath material for wires and cables has good toughness and abrasion resistance, especially the material has good hardness and excellent chemical attack resistance, so that the material can be applied to building lines and sheathes of wires and cables with requirements for preventing termites and mice, and can be used for expanding application ranges of the nylon cable material on the market.

The entraining sampling capillary electrophoresis chip has auxiliary entraining tunnels on two sides of the sampling tunnel and the separating tunnel to form parallel entraining electric field to inhibit the dilatation of sample molecules in the intersection between the sampling tunnel and the separating tunnel and to raise the separating efficiency and detection sensitivity of the electrophoresis chip. In the same time, the chip can alter the width of sampling band via the entraining electric field strength relative to the sampling electric field, so as to regulate the sampling for fitting different analysis. The present invention may be used in the fast and sensitive separation and detection in inorganic molecule, organic molecule, macro biomolecule, virus, cell, etc.

The invention discloses a cement admixture for inhibiting alkali-aggregate reaction. The cement admixture comprises the following components in parts by weight: 30-40 parts of waste glass powder, 15-20 parts of furnace slag, 15-20 parts of mineral slag, 3 parts of wool, 0.3-0.5 part of gelatin, 3-5 parts of alkyl benzene sulfonate sulfate and 10-22 parts of lithium sulfate. The method comprises the following steps: cleaning, airing and grinding waste glass bottles, mixing the waste glass bottles with furnace slag and mineral slag, and performing ball milling to obtain a waste mixture; and uniformly mixing the waste mixture with wool, alkylbenzene sulfonate sulfate, gelatin and lithium sulfate to obtain the cement admixture capable of inhibiting the alkali-aggregate reaction. The preparation process is simple, the use is convenient, the inhibition effect on the alkali aggregate reaction is obvious, the green and environment-friendly effects are realized, and the prepared concrete has excellent performance.

The invention relates to the technical field of pipelines, in particular to a double-layer expansion pipe which comprises a hard outer pipe sleeve and an inner layer pipe formed by compounding multiple layers. The two ends of the inner-layer pipe are each provided with a baffle ring, and the outer pipe sleeve is arranged at the exterior of the the inner layer pipe, and located between the two baffle rings. The outer pipe sleeve comprises an elastic connecting piece, a sliding sleeve and two symmetrical half sleeves. The double-layer expansion pipe has the beneficial effects that the outer pipe sleeve has high corrosion resistance and hardness, the inner layer pipe can be prevented from being corroded, and external pressure can be evenly applied to the surface of the inner layer pipe; the situation that the inner layer pipe is broken due to inconsistent internal and external pressure intensity of a local area is avoided; the internal pressure of the inner layer pipe can be adjusted through deformation, and when the inner layer pipe is expanded, the inner diameter of the outer layer pipe can be adaptively increased, so that the balance of the internal pressure and the external pressure is realized, and the inner layer pipe is prevented from being broken; and the expansion degree between the two half sleeves can be limited through the sliding sleeve, and the situation that the inner layer pipe is broken due to excessive deformation is avoided.

The invention provides a modified calcium oxide expansion agent for cement concrete and a preparation method of the modified calcium oxide expansion agent. The modified calcium oxide expansion agent for the cement concrete is prepared from an ethylene-vinyl acetate copolymer and calcium oxide expansion clinker, wherein the surface of the calcium oxide expansion clinker is coated with the ethylene-vinyl acetate copolymer, and the ethylene-vinyl acetate copolymer accounts for 0.05-10% the total mass of the modified calcium oxide expansion agent for the cement concrete; the specific surface area of the calcium oxide expansion clinker is 100-600m<2> / kg. According to the modified calcium oxide expansion agent for the cement concrete, provided by the invention, the hydration process of the calcium oxide clinker can be adjusted, the invalid hydration of a plastic stage of the concrete is reduced, the hardened expansion quantity is increased, and the shelf life of the expansion agent product is prolonged; the expansion agent can be applied to the crack resisting and seepage prevention of a concrete structure and can be used for greatly improving the durability of the concrete.

The invention discloses a pneumatic type balloon heart assisting apparatus, which comprises an annular balloon and vent tubes, wherein the inner wall and the outer wall of the balloon are made from an elastic material; or the outer wall of the balloon is made from a ductile and non-elastic material; or the outer wall of the balloon is made from a shaped ductile and non-elastic material; the balloon is provided with a single compartment; or the balloon is provided with 2-8 partition compartments and some of the partition compartments fail to communicate while some of the partition compartments communicate; the balloon is connected to the 1-16 vent tubes; the various partition compartments can be connected to different vent tubes; some of the partition compartments can be provided with separating straps therebetween; an opening structure can be arranged on the balloon wall; the side, close to a cup rim, of the balloon is provided with strip-shaped fixing structures; a fixing structure, which is composed of a slender bag and detachable fixing rods, is arranged on the outer wall of the balloon; the balloon can be represented as a half-side cup or a single balloon; electrocatdiogram sensing parts are arranged on the balloon wall; a cardiac pacing part is arranged on the balloon ball; and pressure sensing parts are arranged on the balloon wall. The apparatus can take an assisting effect on systole and diastole; and the apparatus can limit cardiac dilatation and sense electrocatdiogram and cardiac pacing.

The invention provides an internal curing process for improving the performance of high strength and slight expansion concrete, which comprises: mixing and stirring sand and stones, adding a gelled material, an expanding agent and a super absorbent resin; stirring the mixture for 30 seconds, adding water and a water reducer and stirring the mixture for 120 seconds; and filling the mixture into a mold. The water absorption of the super absorbent resin is between 150 and 300 times, the salt solution absorption capacity of the super absorbent resin is between 15 and 40 times, and the added amount of the super absorbent resin is 0.15 to 0.30 percent based on the mass of the gelled material. The process solves the problems of insufficient expansion rate, contraction, cracking and damages of later-stage secondary ettringite generation to the internal structure of the concrete, which are caused by curing. The internal curing technique effectively improves the moisture field in the concrete, the internal moisture content of the concrete and the hydration degree of the concrete, contributes to the full generation of the ettringite in the slight expansion concrete and improves the internal porous structure and compactedness of the concrete.

The present invention provides a new three-electrode surface discharge color plasma display screen unit structure so as to implement high-precision barrier pattern generation, reduce wall load of discharge unit, reduce power consumption, make discharge easily ignite and raise addressing speed, reduce visual effect of space bar between mixed colors of three-primary colors and implemenet lifelike color. The surface discharge color plasma display screen unit structure includes front plate and back plate, and the front plate is formed from front base plate, T-type scanning-holding electrode pair, BUS electrode, transparent medium and magnesium oxide cathode membrane layer, and the back plate is formed from back base plate, addressing electrode, white medium, barrier bar, fluorescence powder and charged mixed gas. A black barrier bar is set on the transparent medium surface of front plate, and the scanning-holding electrode pair is made into the T-type.

The invention belongs to the technical field of construction equipment, particularly relates to a ceramic tile cement pointing device for a construction site, and aims at solving the technical problems that when existing ceramic tiles are subjected to white cement pointing, compaction treatment needs to be carried out, and the manual compaction efficiency is low. According to the scheme, the pointing device comprises a fixing plate, supporting rods are fixedly connected to the two sides of the bottom end of the fixing plate, the bottom ends of the supporting rods are rotationally connected with rotating columns through rotating shafts, one ends of the rotating columns are fixedly connected with rotating blocks, limiting rings are fixedly connected to the outer portions of the rotating blocks, rubber rings are fixedly connected to the outer portions of the limiting rings, arc-shaped rubber layers are fixedly connected to the outer portions of the rubber rings, and a plurality of bent rods are fixedly connected between the two arc-shaped rubber layers. According to the pointing device, through arranging an extrusion plate and a soft rubber layer, cement in a storage groove is extruded out through pressing the extrusion plate, meanwhile, in the process that the soft rubber layer is pushed by manpower, the functions of filling and smoothing cement in a gap are completed, and convenience of pointing work is improved.

The invention discloses a basement roof crack repairing method and repairing structure. The basement roof crack repairing method comprises the following steps that the surface of the area, with a crack, of a basement roof is polished and roughened to form a polished and roughened area; a filling layer formed by smearing polymer cement mortar is smeared on the polished and roughened area and fills the crack; a tensile material is fixed to the filling layer and located between the two sides of the crack; and a filling layer is smeared on the filling layer and the tensile material to completely cover the filling layer and the tensile material, and the outer edge of the filling layer is flush with the surface of the basement roof. According to the basement roof crack repairing method and repairing structure, the filling layer firmly covers the polished and roughened area and fills the crack through the chemical binding force of the polymer cement mortar and the mechanical bite force formed by the polymer cement mortar and the polished and roughened area, so that the repairing effect on the crack is achieved, and then the tensile performance of the basement roof is further enhanced through cooperation of the tensile material and the filling layer.

A method for forming a semiconductor structure comprises the following steps: providing a semiconductor substrate, and forming a first dielectric layer on the semiconductor substrate; forming a plurality of discrete first metal layers in the first dielectric layer, wherein the tops of the first metal layers are higher than the top surface of the first dielectric layer; forming a second dielectric layer on the first dielectric layer between the adjacent first metal layers; performing oxidation treatment on the first metal layer to form a metal oxide layer; forming a third dielectric layer on the surfaces of the second dielectric layer and the metal oxide layer; and etching the third dielectric layer until the metal oxide layer is exposed to form a through hole. According to the forming method, the through hole can be formed in a self-alignment mode, the limitation of the bottom size of the through hole is enlarged, and the short circuit problem is avoided.

The invention relates to a method for preparing a chitosan-silk fibroin composite nano-fiber multifunctional patch for promoting myocardial tissue regeneration and monitoring stem cells. The method comprises the following steps: preparing a cellulose nano-fiber basal plate by an electrostatic spinning technology; alternately assembling positively charged chitosan (CS) and negatively charged silk fibroin (SF) to the surface of nano-fibers layer by layer by adopting a layer-by-layer assembly technique, and assembling 5.5-10.5 layers to form a CS-SF composite nano-fiber membrane; and planting seed cells of adipose tissue-derived stromal cells or cardiac progenitor cells labeled by green fluorescent protein and firefly luciferase on the surface of the CS-SF composite nano-fiber membrane, preparing the patch by three-dimensional co-culture. The patch has excellent biocompatibility, can be used as a cell vector, has an effect of resisting oxidative stress to improve the survival rate and treatment efficiency of stem cells, and is capable of evaluating the number, distribution and function states of transplanted stem cells, effectively preventing occurrence of post-myocardial infarction heart failure and reducing the death rate of ischemic cardiomyopathy.

The invention relates to the technical field of pipelines, in particular to an expanded pressure-resistant pipe, which includes a hard outer sleeve and a flexible inner pipe; two ends of the inner pipe are respectively provided with a retaining ring, and the The outer surface is divided into a symmetrical left semi-arc surface and a right semi-arc surface along any plane passing through the axis line of the pipe, and the right semi-arc surface is provided with a raised part; the outer sleeve includes a left half-arc surface , the right half sleeve and the sliding sleeve; the right half sleeve is slidably connected to the outer wall of the left half sleeve along the direction around the axis of the pipe. The beneficial effect of the present invention is that the inner tube can adjust the internal pressure through adaptive expansion, and the outer sleeve has high corrosion resistance and hardness, which can prevent the inner tube from corroding and can evenly apply the external pressure to the The surface of the inner pipe prevents the inner pipe from being ruptured due to the inconsistency of internal and external pressure in a local area. The combination of the two can ensure that the pipe has high reliability and service life when used in the underground environment.

The invention provides a device and method for generating a high-flux planar light source. The electrode of the device is composed of a cylindrical anode and a coaxially arranged circular rod-shaped cathode. One end of the anode cylinder is closed, and the other end is made of quartz Transmission window air seal; the anode cylinder wall near the cathode emitting end has high-temperature gas outflow holes; the anode cylinder wall on both sides has cold gas inflow holes; the anode cylinder is filled with high-pressure inert gas; An axial magnetic field is applied in the cylinder; a DC constant current power supply is applied between the anode cylinder and the cathode, and an arc is ignited between the cathode emission end surface and the inner wall surface of the anode cylinder. The generation method is to drive the arc rotation and gas flow organization through the magnetic field, control the arc plasma configuration, the cathode arc root and the anode arc root configuration, and change the plasma configuration from the short-arc xenon lamp "bell jar shape" to "disk shape". ; The present invention limits the expansion of the plasma in the axial direction, increases the radial current density, and enhances the luminous power and luminous efficiency.

The invention relates to an inflatable film obstetric apparatus, belonging to the field of medical equipment. The inflatable film obstetric apparatus is characterized by comprising a casing and a control host, wherein the casing is a cylindrical sleeve which is composed of two layers of films and has two open ends, and a sealed inflation space is formed between the two layers of films. The inflatable film obstetric apparatus abandons the structure that a support arm of an original support rod is pushed open, the two layers of films are inflated by gas so as to wrap the head of a fetus, and the fetus is pulled out through the casing. The inflation volume and deflation volume are controlled by a control system and an inflation pump according to production processes; the structure of the inflatable film obstetric apparatus is reasonable; when the inflatable film obstetric apparatus is used, the fetus can not be injured; and the operation is very simple, the pain of a pregnant woman caused by delivery is reduced while the delivery process is accelerated, and thus the fetus is prevented from being injured in the delivery process. More than two one-way air supply valves are arranged on an inside film at the inner end, the one-way air supply valves only can supply air to the outside of the inflation space, and the one-way air supply valves directly correspond to the mouth and nose of the fetus, thereby ensuring the oxygen supply of the fetus and reducing the danger coefficient in delivery.

The invention discloses a short distance communication discovery method, device and system. Wherein, the method includes: the discovery terminal receives discovery information allocated by the network side for the discovered terminal, wherein the discovery information includes: a discovery identifier, and the discovery information is sent to the discovered terminal by the network side; the discovery terminal uses the discovery identifier to search calling or broadcasting; the discovery terminal receives the response returned by the discovered terminal, and determines to discover the discovered terminal.

The invention discloses a treatment method for a high-cavitation peripheral pump impeller, and belongs to the field of peripheral pumps. The cavitation performance of a closed peripheral pump is effectively improved by welding buffering feather scales on the basis of an existing impeller, the buffering feather scales prevent liquid from being in direct contact with blade grooves, impact on the blade grooves due to bubble breakage is prevented, the blade is protected well, the V-shaped structure of the buffering feather scale plays a role in guiding the liquid entering and exiting from the blade grooves in the longitudinal vortex motion, so that the impact of the liquid can be effectively weakened, the energy loss is reduced to a certain extent, and the working efficiency is effectively improved; the impact buffering piece on the buffering feather scale intercepts and divides bubbles by utilizing a bubble retaining ball, gas in the bubbles enters a defoaming spherical shell through a breathable film, the bubble rate in liquid is effectively reduced, and the elastic force of an elastic horn on the impact buffering piece can absorb part of impact energy generated when the bubbles are broken; and the cavitation performance of the peripheral pump is effectively improved.

The invention discloses a method for preparing a key intermediate of baloxavir and the intermediate, which uses 3,4-difluoro-2-methylbenzaldehyde represented by formula (I) as a raw material and undergoes a bromination reaction , to obtain 3,4-difluoro-2-bromomethylbenzaldehyde shown in formula (II), and then obtain 3,4-difluoro-2-(((2-2-) shown in formula (Ⅲ) through substitution reaction Bromophenyl) thio) methyl)-benzaldehyde, and finally synthesize the target product through nucleophilic addition reaction, i.e. 7,8-difluorodibenzo[b,e]thia shown in formula (IV) Seven ring-11 (6H)-alcohol; Concrete reaction process is as follows:. The preparation method of the key intermediate of baloxavir provided by the present invention uses 2-bromothiophenol to replace the foul-smelling and highly toxic thiophenol, and reduces the reaction steps to 3-step reaction, which is a high-yield, low-cost , environmental protection and easy-to-operate preparation method.

The invention discloses an automatic ironing machine, comprising a body frame (1), the upper end of the body frame (1) is provided with a clothes conveying mechanism (2), and both sides of the clothes conveying mechanism (2) are provided with a clothes pressing mechanism (3) The side part of the body frame (1) is provided with an ironing mechanism (4), and the bottom side of the body frame (1) is provided with a clothes tensioning mechanism (5). The invention can automatically iron the wrinkled clothes, and the operation is simple and convenient to use.

The invention belongs to the technical field of concrete materials, and more particularly relates to a traffic detection device wall. Octa(aminophenyl)octasilsesquioxane is adopted as a silane modifying agent in an organic solvent to reform and modify a hectorite structure to prepare organosilicone modified hectorite, and the organosilicone modified hectorite is compounded with calcium oxide and calcium carboxymethyl cellulose to form an expanding agent used for high-performance shrinkage-compensating concrete. According to the expanding agent provided by the invention, high-temperature calcination is not needed in the preparation process, the prepared expanding agent has a large restrained expansion rate, and under the same technical requirements, the adding amount can be reduced, and thecosts can be reduced.

The invention discloses a projector placing frame with good mobility. The projector placing frame is characterized in that a universal ball joint is connected between the upper end of the connecting rod and the bottom of the platform plate, and the lower end of the connecting rod is fixedly connected with a connecting piece; the end parts of a plurality of supporting legs are hinged to the edge ofthe connecting piece to form radial distribution; a plurality of limiting blocks are arranged on the platform plate, the plurality of limiting blocks can be adjusted to move close to the center of the platform plate or move away from the center of the platform plate, and gaps for clamping the projector are formed between the limiting blocks; a movable table is arranged under the supporting legs,a plurality of self-locking universal wheels are arranged at the bottom of the movable table, a push rod is hinged to one side edge of the movable table, and a handle is arranged at the end of the push rod; and a telescopic shaft is arranged at the bottom of the connecting piece, and a limiting rod is hinged between the bottom end of the telescopic shaft and the side wall of each supporting leg. According to the projector placing frame with good mobility, the projector can be stably fixed, the projector can be conveniently used, and the projector can be conveniently moved.