103results about How to "Good workmanship" patented technology

The invention provides a semiconductor device and a preparation method thereof. According to the preparation method of the semiconductor device, after a silicon germanium groove structure is formed, a sacrificial layer is adopted as a sacrificial medium, and a hard mask layer is formed on the surface of each exposed gate structure so as to fill the height difference of the surfaces of the gate structures. And carrying out planarization treatment on the hard mask layer by adopting a chemical mechanical polishing process, so that the heights of the gate structures are recovered to the same horizontal plane. Based on this, the gate structures with the same height not only are beneficial to carrying out chemical mechanical grinding of a larger window by adopting the same load parameter in the subsequent preparation process, but also are beneficial to etching and cleaning the pseudo gate and fully filling the polycrystalline silicon in the subsequent technological process of removing the pseudo gate and filling the polycrystalline silicon; and a better process effect is ensured, so that ideal key parameters can be obtained, and the device yield is improved.

The invention relates to a ceramic product and a preparation method thereof, in particular to a preparation method of a carbon-ceramic brake disc with a composite friction layer and the carbon-ceramic brake disc, which are used for overcoming the defects that the production cost is increased and the large-scale application of the carbon-ceramic brake disc is restricted due to low material utilization rate in the manufacturing process of the carbon-ceramic brake disc. The preparation method of the carbon-ceramic brake disc with the composite friction layer sequentially comprises the following steps of preparation of the carbon-carbon composite material, rough machining, preparation of the heat conduction functional layer, preparation of the composite friction layer, ceramic treatment and finish machining. The heat conduction function layer can effectively reduce the temperature of the disc face in the braking process, the service life of calipers and other surrounding accessories is prolonged, the components of the composite friction layer are uniform and can be designed, and noise and shaking can be reduced in the braking process; in addition, the utilization rate of raw materials is improved and the production cost is reduced by using the residual stub bar. Meanwhile, the invention further discloses a carbon ceramic brake disc with the composite friction layer.

The invention relates to the field of design, processing and manufacturing of compressor impellers, in particular to a novel discrete wheel cover closed impeller which comprises a lower wheel cover, a middle wheel cover and an upper wheel cover, the lower wheel cover is connected with the middle wheel cover through welding, and the middle wheel cover is connected with the upper wheel cover through welding, so that the blade top leakage rate of the discrete wheel cover closed impeller is smaller, and the performance of the discrete wheel cover closed impeller is superior to that of a semi-open impeller; the impeller has better manufacturability, is more beneficial to processing and manufacturing, has larger welding contact area and higher welding strength, meanwhile, the distance between the lower impeller cover and the middle impeller cover and the distance between the middle impeller cover and the upper impeller cover are smaller than 3mm, and the leakage rate is not greatly changed, so that the performance of the impeller is basically consistent with that of a closed impeller, and the axial force level is also basically consistent with that of the closed impeller; and the performance of the discrete wheel cover closed impeller is improved.

The invention belongs to the technical field of aviation composite material component manufacturing, and relates to a honeycomb sandwich composite material wedge-shaped trailing edge part manufacturing method. Comprising the following steps: 1) manufacturing a skin and a rear beam; 2) preforming the honeycomb core; 3) gluing the honeycomb core and the skin; (4) the rear beam and the rear beam male die are fixed to a rear beam forming platform; (5) a limiting block is installed on the rear beam forming platform; (6) an adhesive film is pasted on the surface of the rear beam, and polystyrene foam is coated; (7) the skin honeycomb core assembly and the rear beam are glued and positioned to form a wedge-shaped trailing edge; 8) packaging the vacuum bag and installing a fixed clamping plate; (9) removing the vacuum bag for detection after vacuumizing and pre-compacting, and reassembling the skin honeycomb core assembly if the detection is not qualified; and (10) the step (8) is repeated for vacuum compaction and curing.

The invention relates to a method for preparing idesia oil from idesia peel, which comprises the following steps: (1) primary squeezing: performing primary squeezing on dried idesia peel, and separating to obtain primary squeezed idesia crude oil and primary squeezed cake meal; (2) infiltrating the cake meal; infiltrating the virgin cake meal by using an extraction solvent; (3) squeezing auxiliary extraction: carrying out secondary squeezing on the infiltrated cake meal obtained in the step (2) to obtain an extraction liquid; and (4) separating the leaching solution, namely separating the leaching solvent and the idesia polycarpa leaching crude oil from the leaching solution in the step (3). The idesia oil is extracted by using the idesia peel as the raw material, the idesia peel resource waste and the environmental pollution are reduced, and the oil extraction is fast and the solvent consumption is low by adopting the squeezing-assisted extraction mode.

The invention provides a heat-conducting vegetable protein-based composition, a heat-conducting vegetable protein adhesive as well as a preparation method and application of the heat-conducting vegetable protein-based composition and the heat-conducting vegetable protein adhesive. The heat-conducting vegetable protein-based composition provided by the invention is prepared by ball-milling raw materials including a heat-conducting filler, modified vegetable protein and (3-(methacrylamido) propyl) trimethyl ammonium chloride in a mass ratio of 1: (0.3-5): (0.03-1) for 15-25 hours. The heat-conducting vegetable protein adhesive comprises the following raw materials in percentage by weight: 6-20% of the heat-conducting vegetable protein-based composition and 3-8% of a cross-linking agent, and further comprises 0.1-3% of a flame-retardant reinforcing agent on the basis of the heat-conducting vegetable protein-based composition and the cross-linking agent. The heat-conducting vegetable protein adhesive provided by the invention adopts the heat-conducting vegetable protein-based composition, has good cementing performance and water resistance, also has good heat conductivity, flame retardance and mildew resistance, is beneficial to preparation of multifunctional materials, and is beneficial to industrial application, especially in the field of artificial board industry.

The utility model provides a blade battery which comprises a battery shell and a pole roll, the pole roll is arranged in the battery shell, and the battery shell is provided with a first side and a second side which are oppositely arranged; the at least two pole column pairs are connected with the pole roll, and each pole column pair in the at least two pole column pairs comprises a positive pole column and a negative pole column which are arranged at an interval; wherein one of the at least two pole pairs is arranged on the first side, and the other one of the at least two pole pairs is arranged on the second side. By adopting the technical scheme provided by the utility model, the technical problem that the internal resistance of a blade battery in the prior art is relatively large can be solved.

The invention belongs to the technical field of welding, and particularly relates to a consumable electrode CO2 gas shield flux-cored wire suitable for cryogenic high manganese steel welding, and a flux core accounts for 25-30% of the total weight of the flux-cored wire; the flux core comprises, by weight, 25%-35% of rutile, 30%-34% of electrolytic manganese metal, 1%-5% of potassium sodium titanate, 2%-5% of quartz, 1%-3% of zircon sand, 0-0.5% of manganese ore, 1%-3% of rare earth ferrosilicon alloy, 0.5%-1.5% of rare earth fluoride, 3%-8% of high-carbon ferrochrome, 2%-4% of molybdenum powder, 2%-4% of magnesium-calcium alloy, 3%-7% of aluminum-zirconium alloy, 9%-12% of nickel-magnesium alloy, 0.5%-1.5% of rare earth silicon-calcium alloy and the balance flux. 1-1.5% of bismuth oxide, 0.5-1.5% of graphite and the balance of iron powder. The invention provides the consumable electrode CO2 gas shield flux-cored wire which is good in process and mechanical property, simple in production process and suitable for cryogenic high manganese steel welding.

The invention belongs to the field of welding materials, and particularly relates to an ultra-low-carbon high-Si austenitic stainless steel welding wire resistant to high-temperature concentrated nitric acid corrosion and application thereof. The welding wire comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, 0.3-1.6% of Mn, 3.5-4.5% of Si, less than or equal to 0.01% of P, less than or equal to 0.01% of S, 18.5-20.5% of Cr, 14.5-16.0% of Ni, less than or equal to 1.1% of Mo, less than or equal to 0.15% of Nb, 0.03-0.12% of N, less than or equal to 0.1% of Cu, less than or equal to 0.06% of Co, less than or equal to 0.05% of Al, less than or equal to 0.05% of V and the balance of iron. The welding wire is suitable for welding austenitic stainless steel parts used in high-temperature concentrated nitric acid environments such as nuclear power or petrochemical engineering, the welding process is stable, splashing is small, and the processing property is good. After the ultralow-carbon high-Si austenitic stainless steel welding wire for the high-temperature concentrated nitric acid environment is used for welding, a welding seam with excellent mechanical property can be obtained, the crack sensitivity is low, and the requirement of the high-temperature concentrated nitric acid corrosion service environment is met.

This invention discloses a muscle-relaxing and meridian-clearing health powder and its preparation and application methods, belonging to the technical field of traditional Chinese medicine external health care products. The health powder is composed of fifteen raw medicinal materials: safflower, angelica, asarum, kudzu root, red peony root, scutellaria, dragon's blood, saposhnikovia root, frankincense, myrrh, cinnamon twig, mugwort leaf, coptis root, *Lycopodium clavatum*, and *Clematis armandii*. These materials are dried, pulverized to 80-120 mesh, and then evenly mixed. This invention, through a unique formulation design, integrates multiple effects such as promoting blood circulation and removing blood stasis, dispelling wind and cold, relieving muscle tension and clearing meridians, and clearing heat and drying dampness. Combined with a refined pulverization process, it significantly improves the dissolution rate and transdermal absorption efficiency of the drugs. During use, a hot compress applied via steam allows the medicinal properties to directly reach the affected area, effectively relieving pain and discomfort in the neck, shoulders, waist, legs, and joints. This invention's product has a scientific formulation, advanced technology, is convenient to use, and highly safe, possessing broad market application prospects.

The invention discloses a flat functional current collector and a preparation method thereof, and relates to the technical field of current collectors. The method specifically comprises the following steps that S1, an organic film and a metal foil are attached to the same release film, and interfaces in the thickness direction are in contact; an intermediate product A is obtained; s2, a metal layer is deposited on the face, away from the release film, of the intermediate product A, and an intermediate product B is obtained; and S3, removing the release film in the intermediate product B, and depositing a metal layer on the surface again to obtain the functional current collector. A continuous conducting layer can exist in the edge area of the functional current collector prepared by the method, and a tab is not required to be reserved or welded like a traditional current collector, so that the structural smoothness of the current collector is kept.

The present invention relates to a phase-adjustable rocket capsule docking structure, comprising a front connector, a rear connector, an adjustment ring, a retaining ring, a stud bolt and a nut; the retaining ring is installed in the annular positioning groove of the rear connector, and the adjustment ring is installed between the retaining ring and the annular limit platform in the inner cavity of the rear connector; the rear end thread of the stud bolt is screwed into the threaded hole of the adjustment ring, the front end threaded section of the stud bolt passes through the annular connecting plate at the rear end of the front connector, and the front end protruding part of the stud bolt is sleeved with the nut; when the nut is not tightened, the circumferential phase between the front connector and the rear connector is adjustable, and when the nut is tightened, the circumferential phase between the front connector and the rear connector is fixed. The rocket capsule docking structure of the present invention can realize flexible adjustment of any phase angle of the two sections of the cabin on the basis of ensuring reliable connection of the two sections of the cabin.

The invention discloses a carbon intercalation efficient snow-melting agent and a preparation method thereof, and belongs to the technical field of functional materials and synthesis thereof. The method comprises the following steps: (1) carrying out oil bath treatment on an organic matter and molybdenum trioxide in a solution environment to obtain an intercalated molybdenum trioxide nanosheet; (2) in an inert atmosphere, performing heat treatment on the intercalated molybdenum trioxide nanosheet to complete carbonization, so as to obtain a carbon intercalated molybdenum trioxide nanosheet; (3) in an inert atmosphere, carrying out heat treatment on the carbon-intercalated molybdenum trioxide nanosheet and excessive sulfur to complete a reaction, so as to obtain a carbon-intercalated molybdenum disulfide nanosheet; and (4) adding the carbon-intercalated molybdenum disulfide nanosheet into a chlorine salt solution, and drying to remove the solvent, so that the chlorine salt is loaded, thereby obtaining the carbon-intercalated efficient snow-melting agent. The method has the advantage of convenient process, and the prepared carbon intercalation high-efficiency snow-melting agent utilizes the photo-thermal conversion characteristic of molybdenum disulfide of the carbon intercalation to synergistically enhance the ice-melting capability and slow down the corrosion of the chlorine-type snow-melting agent, and has good popularization and application prospects.

The application discloses an automatic quantitative glue coating and plugging system based on 3D vision, which comprises an industrial computer, a movable platform, a mechanical arm, a 3D camera, a plug stock bin assembly and a terminal device; the mechanical arm is provided with the 3D camera and the terminal device at the tail end; the terminal device comprises a pneumatic gripper assembly, a glue coating assembly and a glue scraping plate; when coating, the industrial computer controls the mechanical arm to drive the 3D camera to move to the top of a hole to be coated to obtain point cloud data of the hole to be coated, and processes the point cloud to obtain the center coordinates, the radius and the depth of the hole to be coated; the industrial computer calculates the glue coating amount according to the radius and the depth of the hole and the glue coating thickness; the plug stock bin assembly pops out a plug matched with the radius of the hole; after the industrial computer controls the pneumatic gripper to take out the popped plug, the industrial computer controls the glue coating assembly to move to the center coordinates to coat glue according to the calculated glue coating amount, and after coating, the industrial computer controls the pneumatic gripper to put the taken plug into the hole.

The utility model discloses a novel backrest handle for protecting passengers, which belongs to the technical field of automobile seats and comprises a seat backrest, a handle, a handle blanking cap and a self-tapping screw. First holes are formed in two ends of the handle, a strip is arranged on the handle blanking cap, a second hole is formed in the end part of the strip, the handle is fixed on the seat backrest through a self-tapping screw, the self-tapping screw sequentially penetrates through the second hole and the first hole, and the handle blanking cap is in interference fit with the handle; the handle assembly is made of rubber materials, on the basis of meeting the requirements of Fanjin laws and regulations, the handle assembly is easy and convenient to install, soft and comfortable in material, good in manufacturability and capable of meeting the requirements of the GB 13057 standard and relieving injuries to the heads of passengers in the back row, the handle assembly is high in structural stability, the key size is easy to guarantee, and the handle assembly can be applied to follow-up platform type development of passenger car handle assemblies. The passenger car seat is suitable for passenger cars with passengers.

The invention provides a manufacturing system selective maintenance decision optimization method considering operation robustness, and the method comprises the steps: 1, collecting and analyzing the data of a manufacturing system after a task is finished after a task period of the manufacturing system is finished; 2, determining the equipment performance state of the manufacturing system, the deviation of the product quality characteristics and the product quality; 3, determining the current robustness level of the manufacturing system; 4, collecting data about machine maintenance, and a corresponding relationship among the maintenance cost, the maintenance time and the maintenance quality of each machine; 5, establishing a selective maintenance decision model by taking robustness maximization of the next task stage as a target and taking maintenance time and cost as constraint conditions; and 6, establishing an ASA-PSO algorithm model to obtain an optimal maintenance strategy. According to the method, the relationship between the system robustness and the machine performance reduction, task delay and product quality non-compliance risk is considered, the function risk and mechanism of the manufacturing system are analyzed, the use of maintenance resources is optimized, and a better maintenance plan is realized.

The present invention provides a porous silicon-based cathode electron source and a preparation method and preparation equipment thereof, and relates to the technical field of cathode electron emission sources. The preparation method of the porous silicon-based cathode electron source comprises: preparing a porous silicon layer by an anodic oxidation method; in a first electrolyte, performing a cathode reduction treatment on the porous silicon layer so that specific ions in the first electrolyte passivate the porous silicon layer, which is beneficial to the oxidation of the porous silicon layer; electrochemically oxidizing the passivated porous silicon layer so that the passivated porous silicon layer is uniformly and fully oxidized; and thermally annealing the porous silicon layer after the electrochemical oxidation treatment. The preparation method first uses cathode reduction to passivate the porous silicon layer before the electrochemical oxidation treatment, which helps the electrochemical oxidation to oxidize the porous silicon layer more completely and fully, and reduces the random scattering effect of electrons in the porous silicon layer caused by defect states during the tunneling acceleration process, thereby greatly improving the repeatability and stability of the device current and emission current.

This invention discloses a traditional Chinese medicine composition for replenishing qi and nourishing blood, and its preparation method, belonging to the technical field of food-medicine homology traditional Chinese medicine health care preparations. The composition of this invention uses oyster peptide powder, compound amino acid powder, polygonatum powder, maca powder, eucommia male flower powder, ginseng powder, cordyceps powder, and earthworm protein peptide powder as core active ingredients, supplemented with deer antler powder, deer tendon powder, and deer blood peptide powder to enhance the effects of strengthening the body and nourishing blood. It is combined with xylitol, corn starch, maltodextrin, magnesium stearate, and caramel color as molding excipients. The dosage of each component is precisely controlled. Through a proprietary preparation process involving raw material pretreatment, segmented gradient mixing, and refined post-processing, a 1g / tablet formulation is prepared. The formulation of this invention is rigorously formulated, with clear distinctions between principal, assistant, and adjuvant ingredients, and each component synergistically enhances its effect. It can fundamentally improve problems such as qi and blood deficiency, insufficient vital energy, fatigue, and physical weakness. It has comprehensive efficacy, rapid onset of action, and wide applicability, possessing extremely high industrial promotion and health care application value.

Provided is a solid wire for gas metal arc welding, solid wire being suitable as a welding material for high-Mn steel materials and generating less fume during welding. The solid wire of the present invention has a composition containing, in mass%, C: 0.20 to 0.80%, Si: 0.15 to 0.90%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.020% or less, Ni: 0.01 to 10.00%, Cr: 6.0 to 15.0%, Mo: 0.01 to 3.50%, O: 0.010% or less, N: 0.120% or less, and the balance being Fe and incidental impurities.

The application provides a rod group connecting unit and a rod thereof, and relates to the technical field of rod connecting structure. The unit comprises a first pipe body and a second pipe body; one end of the first pipe body is coaxial with and butts against one end of the second pipe body; an outer connecting hole, an outer hoisting hole and an outer supporting hole are sequentially and axially provided on the first pipe body; an inner connecting hole, an inner hoisting hole and an inner supporting hole are sequentially and axially provided on the second pipe body; the outer diameter of the second pipe body is smaller than the inner diameter of the first pipe body; when the second pipe body in one rod group connecting unit is embedded into the first pipe body in another rod group connecting unit, the inner connecting hole, the inner hoisting hole and the inner supporting hole on the second pipe body correspond to the outer connecting hole, the outer hoisting hole and the outer supporting hole on the first pipe body one by one. The connecting unit provided by the application can realize high-precision depth setting, accurately transmit torque to realize angle adjustment, and has safe and reliable operation process.

The utility model discloses a device for strengthening the connection of a duct piece and a ballast bed, which comprises a connector, a cylindrical screw rod and an anchoring head, the connector is positioned at the lower part of the device and is used for realizing the connection with a duct piece bolt; the anchoring head is located on the upper portion of the device and embedded in a ballast bed. Compared with the prior art, the utility model has the positive effects that an integrated connecting device is adopted, one end of the integrated connecting device is a connector matched with a pipe piece hand hole, the other end of the integrated connecting device is a conical anchoring head poured in ballast bed concrete, and the middle of the integrated connecting device is of a cylindrical rod body structure. The connecting structure is simple in structure, good in manufacturability, convenient to construct, good in universality and reliable in connection, the connecting capacity of the ballast bed and the duct piece is enhanced, and the situation that the duct piece is disengaged from the ballast bed is effectively reduced.

The utility model relates to an awning structure of an outdoor two-layer lifting garage, the awning structure of the outdoor two-layer lifting garage comprises an outdoor lifting garage body, an upper-layer vehicle carrying plate and an awning, the top of the upper-layer vehicle carrying plate is provided with an adjusting assembly and a driving assembly, the adjusting assembly and the driving assembly are used for adjusting the height of the awning, the adjusting assembly comprises two first sleeves fixedly installed at the top of the upper-layer vehicle carrying plate, driving cylinders are rotatably installed on the inner walls of the first sleeves, threaded blocks are installed on the inner walls of the driving cylinders in a threaded mode, supporting rods extending out of the first sleeves are fixedly installed at the tops of the threaded blocks, and the awning is installed at the tops of the supporting rods. The driving assembly comprises a fixing plate and a limiting plate which are fixedly installed on the top of the upper-layer vehicle carrying plate. According to the awning structure of the outdoor two-layer lifting garage, the height of the awning can be adjusted according to requirements through the supporting rods, the flexibility of the awning is improved, and the rain shielding effect of vehicles with different heights can be improved.

The application provides an electric valve device, which comprises a valve body, a valve sleeve and a sleeve arranged in sequence along an axial direction, the valve body is fixedly welded with the valve sleeve, one of two ends of the valve sleeve away from the valve body is a first end, the first end is fixedly welded with the sleeve, the first end of the valve sleeve is provided with a convex part protruding inward along a radial direction, the electric valve device further comprises a valve core unit, the valve core unit is at least partially located in the valve sleeve, the valve core unit is movable along the axial direction to the direction of approaching or moving away from the sleeve, when the valve core unit moves to a limit position in the direction of approaching the sleeve, the valve core unit is in contact with the convex part. The electric valve device has low leakage failure rate.

The invention discloses a micro pneumatic artificial muscle based on a phase transition hydrogel driver and a preparation method and application thereof, and belongs to the technical field of polymer functional materials. The method comprises the following steps: (1) taking octyl acrylate and acrylamide as monomers, dissolving the monomers, beta-cyclodextrin and a cross-linking agent in a dimethylformamide dispersion liquid of sea squirt cellulose nanocrystals, and then adding a photoinitiator to obtain a pre-polymerized liquid; carrying out light curing and solvent replacement on the pre-polymerized liquid to obtain hydrogel with a pipeline-shaped structure; and (2) connecting one end of the hydrogel with the pipeline-shaped structure with the air cavity, and sealing the other end of the hydrogel to obtain the micro pneumatic artificial muscle based on the phase change hydrogel driver. The method has the advantages of convenient process, mild reaction and wide and easy materials. The miniature pneumatic artificial muscle prepared based on the method has the characteristics of adjustable mechanical properties independent of water permeation and high driving speed, and has a wide application prospect in miniature bionic soft robot equipment.

The invention discloses a preparation method of a super-hydrophobic microporous separation membrane, which comprises the following steps: introducing nanoparticles into a membrane casting solution system to form a multielement membrane casting solution system consisting of polymer / solvent / additive / nanoparticles, and preparing the separation membrane through a non-solvent induced phase separation process. The nanoparticles are particles subjected to hydrophobic modification by using perfluoro and polyfluoroalkyl compounds, and have through pore structures and rich hydroxyl groups on the surfaces. A hydrophobic fluorine-containing long chain modified on the surface of a hydrophobic / hydrophilic pore channel particle obviously enhances the compatibility and dispersity of the hydrophobic / hydrophilic pore channel particle in a PVDF casting membrane solution, and richer hydrophilic hydroxyl groups on the surface of the uniformly distributed particle promote the exchange of a water phase and a polymer-rich phase during phase separation; the through pore channel structure can also be used as a mass transfer channel of water coagulating bath during phase inversion and water vapor during membrane distillation, through the interaction, the membrane pore diameter is increased, the porosity is improved, meanwhile, polymer crystallization is induced to form a rough spherical particle structure, and a super-hydrophobic surface is constructed.

The application provides a missile engine storage availability evaluation method, namely a missile engine storage availability evaluation method based on a two-stage sampling scheme and historical sampling data, and the implementation steps are as follows: 1, parameter estimation according to historical sampling data; 2, calculation of the two-stage sampling probability of the missile engine; 3, iterative calculation of the instantaneous availability evaluation value of the engine; 4, calculation of the average availability evaluation value of the engine; the application realizes the evaluation of the storage reliability and storage availability of the missile engine without additional experiments, the evaluation value is derived from actual data, has authenticity, accuracy and stability, the iterative method is simple, the requirement for historical data is low, the operability is strong, and not only the average availability of the missile engine can be evaluated, but also the instantaneous availability of the missile engine can be evaluated.

This invention belongs to the field of aircraft separation structure design technology, specifically relating to an explosive bolt collection device and its design method suitable for compact axial space. The method includes: Step 1, determining the initial velocity and initial kinetic energy of the explosive bolt remnant; Step 2, selecting buffer structure connecting fasteners based on the initial kinetic energy of the explosive bolt remnant calculated in Step 1; Step 3, designing the collection structure based on the initial kinetic energy of the explosive bolt remnant calculated in Step 1 and the buffer structure connecting fasteners selected in Step 2; Step 4, conducting numerical simulation analysis and ground tests on the bolt collection device designed in Steps 2 and 3 to verify the feasibility of the design method for an explosive bolt collection device suitable for compact axial space. This invention can solve the problems of complex structure, high axial space requirements, and the risk of rebound in explosive bolt collection devices.

This invention belongs to the field of image transmission fiber technology and discloses a bend-insensitive high-resolution image transmission fiber and its fabrication method. The image transmission fiber provided by this invention comprises several image transmission cores and a co-cladding layer between the image transmission cores; each image transmission core includes, from the inside out, a core layer, a recessed layer, an inner cladding layer, and a light-absorbing layer; the light-absorbing layer is quartz glass containing absorber ions and fluorine. The fabrication method of the image transmission fiber provided by this invention includes preparing a light-absorbing core rod, drawing the light-absorbing core rod to obtain a light-absorbing capillary rod, stacking several light-absorbing capillary rods in a pure quartz glass sleeve to obtain an image transmission fiber preform, and drawing the image transmission fiber preform to obtain a bend-insensitive high-resolution image transmission fiber. This invention can improve the imaging resolution of the image transmission fiber, and the fabrication method has the advantages of simple and convenient process and strong production stability.

The invention provides an immersed battery cell cold plate which comprises a hollow box plate and a heat exchange frame fixed in the hollow box plate, and a liquid inlet pipe and a liquid outlet pipe are mounted at two ends of one side wall of the hollow box plate; cooling liquid is filled between the heat exchange frame and the interior of the hollow box plate. The heat exchange frame comprises a first flow collecting chamber, a second flow collecting chamber and a heat exchange unit. The first flow collecting chamber and the second flow collecting chamber are both of a hollow structure, a partition piece is arranged in the first flow collecting chamber and divides the first flow collecting chamber into a liquid inlet cavity and a liquid outlet cavity which are independent, the liquid inlet cavity is communicated with a liquid inlet pipe, and the liquid outlet cavity is communicated with a liquid outlet pipe; the heat exchange units are a plurality of hollow plate bodies which are mounted between the first flow collecting chamber and the second flow collecting chamber and communicate the first flow collecting chamber with the second flow collecting chamber; and a plurality of turbulent flow strips are mounted on the inner wall of each heat exchange unit. The device is compact in structure, light in weight and low in nonferrous metal consumption; the material utilization rate is high and the manufacturability is good; the flow speed of cooling liquid in the cooling flow channel can be automatically adjusted through temperature changes.

The invention provides a manufacturing method of a semiconductor device, which comprises the following steps of: providing a semiconductor substrate comprising a first pattern region and a second pattern region, and performing floating gate polycrystalline silicon deposition on the semiconductor substrate to form a first polycrystalline silicon layer; the pattern density of the first pattern area is greater than that of the second pattern area; performing ion implantation on the first polycrystalline silicon layer, and forming an oxide layer on the top surface of the first polycrystalline silicon layer; protecting the oxide layer of the second pattern area and etching the oxide layer of the first pattern area; performing chemical mechanical polishing treatment on the first polycrystalline silicon layer in the first pattern area and the oxide layer and the first polycrystalline silicon layer in the second pattern area; and generating the semiconductor device based on the first polycrystalline silicon layer after the chemical mechanical polishing treatment. The thickness of the polycrystalline silicon layer in the areas with different pattern densities can be ensured to be consistent, so that the reliability of the semiconductor device is improved, and the process is simple and convenient, high in flexibility and easy to implement.