24results about How to "Increase the aperture" patented technology

The present application relates to complex stratum pile foundation construction technology field, disclose a kind of riprapping stratum full casing rotary and rotary drilling combined hole construction method, comprising the following steps: leveling construction ground;Pile position lofting is carried out, and guiding positioning structure is set;First section casing with grouting passage is installed on full casing rotary drilling machine, grouting passage is used for grouting;Through full casing rotary drilling machine clamping casing, drive casing press into riprapping stratum, while rotary drilling carries out soil taking;Slurry is injected by grouting passage, and riprapping body outside casing is consolidated to form annular consolidated body;The elevation difference between the soil taking surface of rotary drilling and the bottom end of casing is controlled to be within the preset range, and the following protection wall is formed;Lengthen next section casing, and connect adjacent grouting passage;Until casing penetrates riprapping layer and main sand layer and enters lower stable layer.The present application can solve the problems of difficult riprapping stratum hole forming, easy hole collapse, easy grouting leakage and easy drill sticking.

This invention discloses a carbon-coated iron porous aerogel, its preparation method, and its application in lithium metal anodes, belonging to the field of lithium metal anode material preparation. The carbon-coated iron porous aerogel of this invention constructs a continuously conductive and highly stable carbon-based porous three-dimensional framework through the synergistic effect of two-dimensional graphene oxide, one-dimensional carbon nanotubes, and carbon-coated iron units. The NaCl hard template effectively amplifies the macropore size and increases the number of pores, providing interconnected channels for the rapid wetting and spontaneous climbing of molten lithium. The carbon-coated iron interface serves as a stable lithiophilic site, inducing uniform nucleation of lithium metal and restricting disordered growth, thereby achieving stable confinement of lithium metal in the composite electrode.

The application discloses a high-strength, large-pore-volume phosphorus-containing binder, characterized in that the binder comprises a glue, a curing agent and a modifier; the glue comprises a phosphorus-containing compound and an aluminum-containing compound; the curing agent comprises a gamma-aluminum oxide precursor, an acid and an alkylammonium salt, and the modifier is a metal chelate; wherein the colloidal solubility index of the gamma-aluminum oxide precursor is less than or equal to 50%; and the modifier is reacted with the glue in a high-shear dispersion emulsifier. The phosphorus-containing binder provided by the application, in combination with a conventional method, can obtain a catalytic cracking catalyst which, on the basis of high molecular sieve content and large pore volume, still has high wear resistance.

The invention discloses a front end framework left and right mounting support stamping system which comprises a progressive die, the progressive die comprises an upper die and a lower die, the upper die is located at the top of the lower die, a floating material guide block is arranged at one end of the upper die, and a material belt guide ruler used in cooperation with the floating material guide block is arranged at the corresponding position of the lower die. The other end of the lower die is provided with a product sliding groove and a waste sliding groove. By integrating floating material guiding and multi-station continuous stamping, automatic feeding, accurate positioning, multi-procedure synchronous machining and automatic separation of finished waste are integrated, a floating material guiding block of the upper die and a material belt guiding ruler of the lower die are matched at the feeding end to achieve lifting and transverse guiding of a material belt, and the automatic feeding, accurate positioning, multi-procedure synchronous machining and automatic separation of the finished waste are achieved. In the punching process, a guide hole used for accurate positioning in the whole process is punched at first, then a guide pin is used for hole pin inserting and positioning before feeding in each subsequent step, and therefore the accumulated feeding error is effectively restrained.

The present invention provides a MOR molecular sieve membrane and a preparation method thereof, wherein the preparation method of the MOR molecular sieve membrane comprises the following steps: S1, mixing an aluminum source, an alkali solution, a silicon source, a fluoride salt, an organic alcohol and water to obtain a synthetic sol; S2, coating a seed solution on the surface of a porous carrier to obtain a seed layer; S3, coating the synthetic sol on the surface of the seed layer, and performing three temperature-variable crystallizations to obtain a MOR molecular sieve membrane; in step S1, the molar ratio of SiO2, Na2O, Al2O3, ROH, NaF and H2O is 1: (0.1-0.35): (0.03-0.15): (0.2-2): (0.1-0.5): (10-100). The present invention adds an organic alcohol to improve the crystallinity and overall structural integrity of the MOR molecular sieve membrane structure.

The application discloses a kind of sparse array amplitude-phase error correction-based meshless parameter estimation method, and its implementation steps are: receiving end is laid out sparse array;The received signal of sparse array with array element gain phase error is modeled;Sample covariance matrix is constructed;The output signal of virtual differential common array is calculated by vectorization;Define the atom norm of introducing amplitude-phase error parameter, and construct the optimization model for target direction estimation;By dual atom norm, the original optimization problem is converted into its dual problem;The semi-positive definite programming form of dual problem is deduced;Dual polynomial is constructed, and the wave direction estimation result is obtained by spectral peak search.In addition, the application fully utilizes the virtual differential common array of sparse array to provide extended degrees of freedom and all information, and suppresses the influence of array element amplitude-phase error by defining new atom norm, solves the mesh mismatch problem caused by parameter domain discretization, and obtains high-precision meshless direction estimation result.

The invention discloses an underwater buried target electrical imaging method, and belongs to the field of underwater buried target detection imaging. The method comprises the following steps: firstly, preparing a detection device which comprises two rows of receiving and generating electrodes, then obtaining an array flow pattern and a flow pattern matrix, and then carrying out matrix scanning on a detection area where a buried target object is located by using the detection device to obtain a received signal matrix; and then obtaining a target width value and a position corresponding to each row of the received signal matrix through spatial spectrum estimation and sliding window scanning, and finally performing inversion imaging based on the width values and the positions. According to the invention, a virtual electrode array is formed based on two pairs of mobile receiving and generating electrodes, and the system has the advantages of low system complexity, low cost, high imaging speed, high accuracy and the like.

The invention discloses a silicon oxide microsphere as well as a preparation method and application thereof. The silicon oxide microspheres are large-aperture silicon oxide microspheres, the specific surface area is 395-750m < 2 > / g, the pore volume is 1.0-3.5 ml / g, and the average aperture is 17-50nm. The silicon oxide microspheres have the characteristics of large specific surface area, large pore volume and large pore diameter, and the catalyst prepared by using the silicon oxide microspheres as the carrier has the advantage that the activity is remarkably improved when the catalyst is applied to olefin polymerization reaction.

The application belongs to the technical field of lithium batteries, and relates to a preparation method of a double-coated silicon-carbon composite material, an electrode and a lithium battery.The method comprises the following steps: placing a lithium dopant and a MOF material in a first organic solvent, adding a template agent and a catalyst, reacting, filtering, freeze-drying and obtaining a gel composite; in an inert atmosphere, the gel composite is heated to a first preset temperature, carbon dioxide is introduced at a preset flow rate, the temperature is lowered, the gel composite is soaked in mixed acid, pickling is performed, vacuum drying is performed, and a porous carbon composite material is obtained; liquid silane, a phosphine derivative, a dispersing agent, the porous carbon composite material and a silane coupling agent are added to a second organic solvent, spray drying is performed, primary carbonization is performed, and a silicon-carbon precursor material is obtained; resin is dissolved in a third organic solvent, a fast ion conductor and the silicon-carbon precursor material are added, secondary carbonization is performed, the temperature is lowered to a second preset temperature, a reducing gas is introduced, and a double-coated silicon-carbon composite material is obtained; the conductivity is improved, the interface stability is improved, and the full charge swelling is reduced.

The application belongs to the field of environmental protection technology of biological repair of wastewater, and discloses a kind of immobilized adsorption microspheres, which comprise sea kobe bacteria, Candida guilliermondii and European nitrosomonas bacteria, and are prepared by immobilized embedding technology. The microspheres of the application can effectively repair glutamic acid high ammonia nitrogen fermentation wastewater.

This invention discloses a cubic bifunctional adsorbent material, its preparation method, and its applications. The preparation method includes the following steps: calcining a zeolite imidazole framework at a temperature above 800°C under an inert atmosphere to obtain the cubic bifunctional adsorbent material. The cubic bifunctional adsorbent material of this invention can simultaneously adsorb sulfonamide antibiotics and heavy metals. It also possesses a large specific surface area, numerous adsorption sites, abundant pore structure, large pore volume and diameter, and high adsorption capacity. It is a novel bifunctional adsorbent with excellent performance. When used to treat complex wastewater containing sulfonamide antibiotics and heavy metals, it can effectively remove these substances from the wastewater, demonstrating high practical value and promising application prospects. The preparation method of this invention also has advantages such as simple process, convenient operation, low cost, economic safety, and ease of promotion. It plays a significant role in promoting the large-scale preparation and industrial application of cubic bifunctional adsorbent materials.

This invention relates to the field of hydrocracking catalysts, and discloses a hydrocracking catalyst, its preparation method and application, and a method for hydrocracking treatment of residue oil. The hydrocracking catalyst contains molecular sieves, silicon-modified alumina, and active metal components. Optionally, the hydrocracking catalyst also contains alumina and / or additives. The content of the molecular sieve is 5-25 wt%, the content of the silicon-modified alumina is 30-60 wt%, and the content of the alumina is 0-20 wt%. The content of the active metal components, calculated as oxides, is 5-35 wt%, and the content of the additives, calculated as oxides, is 0-1.0 wt%. The catalyst provided by this invention has the advantages of large specific surface area, large pore volume, large pore size, and high metal content. When used in the hydrocracking treatment of residue oil, it not only exhibits high activity and good stability, but also improves naphtha selectivity, expands feedstock adaptability, and reduces hydrogen consumption.

This invention discloses a Ni-based catalyst, its preparation method, and its application in the oligomerization reaction of ethylene, belonging to the field of catalyst synthesis technology. This invention uses ammonium niobate oxalate hydrate as the niobium source and adds an ammonium solution to the reaction system. Under ultrapure water as the solvent, a niobium oxide support with a nanorod morphology is synthesized. A metal nitrate is used as a supporting metal precursor, and the precursor is loaded onto the nanorod niobium oxide support using a wet impregnation method to obtain a catalyst precursor. The catalyst precursor is then heat-treated to obtain a nanorod niobium oxide-supported nickel-based catalyst. The nanorod niobium oxide-supported nickel-based catalyst prepared by this invention exhibits high 1-butene selectivity and ethylene conversion in the ethylene oligomerization reaction.

This invention relates to an ultra-high cell density organ module based on click chemistry photocurable hydrogel, its construction method, and its applications. The construction method includes: providing norbornene-modified high molecular weight hyaluronic acid with a high grafting rate and thiol-modified high molecular weight hyaluronic acid; mixing a photoinitiator, cells, HANb solution, and HASH solution; and rapidly cross-linking and curing the module through a click chemistry reaction after extremely short-term light exposure to form the organ module. This invention utilizes the synergistic effect of the high molecular weight hyaluronic acid host material and the high grafting rate modification to achieve the construction of an ultra-high cell density organ module under ultra-low photoinitiator concentration and extremely short light exposure conditions. The liver module constructed based on this method possesses extremely high cell density, good mechanical properties, and excellent liver function.

This invention relates to a C x N y This invention relates to a Pt@C fuel cell catalyst and its preparation method, belonging to the field of fuel cell catalyst technology. First, Pt@C is synthesized via a solvothermal reaction using ethylene glycol reduction. Then, it is mixed with a nitrogen-containing polymer material and cobalt chloride hexahydrate, and subjected to reduction in a reducing atmosphere, high-temperature treatment, carbon pyrolysis, and alloying to obtain porous nitrogen-containing carbon-coated Pt@C. x N y @PtCo / C catalyst. In the prepared catalyst, the porous coating layer significantly reduces the poisoning of catalyst particles by resin during fuel cell operation, improves cell activity, and extends cell life, exhibiting excellent activity and durability.

The application discloses a magnesium-aluminum alloy workpiece and a surface nano processing method thereof, and relates to the technical field of metal material processing technology.The roughening liquid adopts sulfuric acid to realize surface etching, forms uniform corrosion pits, and is matched with hydroxyethylidene diphosphonic acid corrosion inhibitor to effectively inhibit the pitting corrosion and intergranular corrosion of the magnesium-aluminum alloy and avoid excessive roughening to cause the strength of the base material to decrease.During ash removal, an alkaline medicine liquid is added with a surfactant, isostearyl alcohol polyoxyethylene ether is used as a non-ionic surfactant, residual ash in the corrosion pits is stripped, an activated metal surface is exposed, and the uniformity of subsequent electrolytic treatment is ensured.The application generates a stable and firm composite oxide film on the surface of the magnesium-aluminum alloy workpiece through electrolytic treatment, uniform nano holes are formed on the oxide film, and the bonding performance of the magnesium-aluminum alloy workpiece subjected to nano injection molding is improved.

The present invention relates to a telephoto large-aperture high-definition camera lens. The optical system of the lens consists of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an equivalent glass plate, which are arranged in sequence from the object side to the image side along the optical axis. The first lens is a positive meniscus lens, the second lens is a double convex positive lens, the third lens is a double concave negative lens, the fourth lens is a negative meniscus lens, and the fifth lens is a positive meniscus lens. The lens has a simple structure and is easy to assemble, and is more suitable for large-scale high-yield production; the focal length is longer, the surface design is good, the distortion is lower, and the image quality is excellent; the aperture is larger, and higher resolution and picture brightness can be presented, and it is not afraid of dark light environment; the imaging size is larger, and the illumination uniformity is good, and it can be adapted to a new generation of large-target CMOS.

This utility model discloses a material collection and separation mechanism for a trough, comprising a separation grid. The separation grid includes multiple staggered grid bars, with multiple separation mesh openings formed between the grid bars to allow airflow. Each grid bar has a cut edge on its windward surface. Airflow blowing towards the separation mesh openings passes through any cut edge, forming a first airflow and a second airflow that splits along the sidewall of the grid bar. Materials of different densities and particle sizes carried in the airflow are separated by the first and second airflows after passing through the cut edge. This utility model's material collection and separation mechanism for a trough achieves rapid and effective separation by separating materials of different densities and particle sizes carried in the airflow through the separation grid.

The present invention relates to an integrated design method for an endoscope system and an endoscope camera optical system. The endoscope system includes an objective lens module, a relay module, an eyepiece module, an optical interface optical path module and a digital ultra-high-definition camera arranged in sequence along the optical path direction. The image formed by the objective lens module is projected to the optical interface optical path module in a non-parallel light manner / divergent light manner after passing through the relay module and the eyepiece module. The present invention achieves ultra-high resolution of the integration of an optical endoscope and an endoscope camera system by improving the resolution of the system. The resolution is limited by the aperture angle of the image side, which can be obtained from the formula 2tanu'=D / f'. The relative aperture and entrance pupil diameter of the system need to be improved. The relative aperture of the system includes the relative aperture of the objective lens module, the relative aperture of the eyepiece and the relative aperture of the optical interface. The relative apertures mentioned in this patent are all relative apertures of the system, and the entrance pupil diameter and exit pupil diameter are required to be improved at the same time. For example, the entrance pupil diameter of existing #imgabs0# laparoscope products is generally 0.2mm~0.4mm, the exit pupil diameter is 1mm~2mm, and the relative aperture is 1:10. This solution takes the overall system into consideration, with an entrance pupil diameter of 0.6mm, an exit pupil diameter of 3mm~6mm, and a relative aperture of 1:4~1:6. It can achieve a clarity of MTF>0.2@120lp / mm (i.e., 120 pairs of lines can be resolved per millimeter) in the full field of view of different products with a field of view angle of 50° to 120°.

The invention belongs to the technical field of lithium adsorption, particularly relates to a high-adsorption-capacity aluminum lithium adsorption film, and further discloses a preparation method of the high-adsorption-capacity aluminum lithium adsorption film. According to the high-adsorption-capacity aluminum-series lithium adsorption film, the linear polymer with the cation mass transfer capacity is selected, then a high polymer material with the ion mass transfer capacity is synthesized, and the mass transfer path is shortened with the maximum efficiency in the mode that a traditional three-dimensional granular lithium adsorbent is converted into a two-dimensional planar lithium adsorption film, so that the adsorption capacity of the aluminum-series lithium adsorption film is improved, and the adsorption capacity of the aluminum-series lithium adsorption film is improved. And by constructing an ion mass transfer channel between the high polymer and the embedded precursor, lithium ions in the brine can be quickly transferred to an embedded adsorption site, so that the adsorption capacity is improved. The adsorption film product disclosed by the invention has the advantages of high adsorption speed and large adsorption capacity, and has an obvious lithium extraction effect.

This invention provides a drilling and positioning mechanism for an impeller box, belonging to the field of mechanical technology. It solves the problem of ensuring drilling accuracy for impeller boxes. The drilling and positioning mechanism includes a frame with a columnar positioning seat for mounting the impeller box. The frame also has a U-shaped, liftable pressure plate located directly above the positioning seat and having a clearance notch opposite the positioning seat. A positioning post is vertically slidably connected to the pressure plate, with its lower end opposite the clearance notch and its lower surface higher than the lower surface of the pressure plate. A spring is also provided on the pressure plate, elastically acting downwards on the upper end of the positioning post. This drilling and positioning mechanism ensures drilling accuracy for the impeller box.