264results about How to "Meet diverse needs" patented technology

The invention relates to the technical field of plasma electric flame stoves, in particular to a system for supplying nitrogen through centralized air separation for an electric flame stove and a working method. The system comprises an air compression and pretreatment unit, a pressure swing adsorption separation unit, a nitrogen buffer pressure stabilization unit, a nitrogen distribution conveying pipe network, a user side regulation and control unit and at least one electric flame stove which are sequentially connected in the gas flow direction. According to the invention, through centralized nitrogen generation and pipeline distribution, the problem of large-flow nitrogen supply of dispersed users is solved, and the emission of nitrogen oxides is greatly reduced due to the use of oxygen-free nitrogen by the electric flame stove. According to the system, indoor oxygen supplementation of oxygen-enriched gas and domestic hot water recovery of compressed waste heat are achieved at the same time, and the comprehensive utilization efficiency of resources is improved; by adopting the carbon steel pipe net, the construction cost is reduced, and nitrogen with different purities can be flexibly produced to meet multiple requirements; and real-time matching of nitrogen supply and stove power is realized through intelligent flow control of a user side, and stable and efficient operation is guaranteed.

The utility model belongs to the technical field of stirring, disclose a kind of multifunctional handheld stirring device, including mounting plate, the middle part of mounting plate is connected with vertical downward telescopic stirring rod by bearing, the bottom end of telescopic stirring rod is connected with replaceable modular stirring head by quick dismounting and replacement assembly, fluid splash shield is equipped on telescopic stirring rod;The top of telescopic stirring rod is equipped with passive gear, and the top of mounting plate is equipped with the fixed branch plate of U shape.The utility model can adjust length by the setting of telescopic stirring rod, can adapt to the material stirring use of different depth;The bottom end of telescopic stirring rod is connected with replaceable modular stirring head by quick dismounting and replacement assembly, can carry out quick dismounting and replacement to modular stirring head, satisfy diversified demand;The setting of fluid splash shield can prevent fluid splashing, avoid causing material waste, and brushless motor can provide stable driving force by gear transmission.

This utility model discloses a reinforced straight seam welded pipe extrusion roller, including a base with a welded pipe channel for the straight seam welded pipe to pass through. Detachable extrusion roller assemblies are slidably mounted on both sides of the base, corresponding to the welded pipe channel. Each extrusion roller assembly includes a roller body mounting seat, on which an extrusion roller body is rotatably mounted via a mounting roller shaft. A mounting groove matching the roller body mounting seat is provided on the side of the base. This utility model allows for flexible adjustment of the extrusion roller body position according to the production needs of straight seam welded pipes of different specifications by sliding the roller body mounting seat within the mounting groove on the side of the base, greatly improving equipment applicability. When maintenance or replacement of the extrusion roller body is required, the fixing bolts are loosened to disengage it from the fixing threaded hole, allowing the roller body mounting seat to be easily removed. This convenient disassembly and assembly design shortens maintenance and replacement time, reduces labor costs and impact on production schedules, and effectively improves production efficiency.

The utility model relates to a tail cover with a rotary switch and a flashlight. The tail cover with the rotary switch comprises a sleeve and a switch assembly. The switch assembly comprises a point switch, a switch base, a pressing cap, a reset spring, a connecting sleeve and a rotating ring. The point switch is arranged in the mounting space of the switch base; the connecting sleeve sleeves the periphery of the pressing cap, and the front end of the connecting sleeve extends into the sleeve; the rotating ring sleeves the connecting sleeve and is fixedly connected with the connecting sleeve; a positioning ball is arranged at the front end of the connecting sleeve; three positioning holes located in the same virtual circle are formed in the switch base, an ejector block is formed on the outer side of the switch base, and a low-position platform, a middle-position platform and a high-position platform are formed at the front end of the pressing cap in the circumferential direction. When the positioning beads extend into the corresponding positioning holes, the top block and the low-position platform or the middle-position platform or the high-position platform jointly restrain the maximum distance of the pressing cap moving towards the direction close to the point switch. And gear switching and positioning are achieved by rotating the rotating ring, the diversified requirements of a user in different scenes can be met, and practicability is high.

The invention discloses a preparation method and application of a surface functionalized nano-gold microsphere. According to the method, by optimizing reaction conditions and using low-cost raw materials, efficient synthesis and surface functionalization of the nanogold microspheres are achieved, and the performance of the nanogold microspheres in the fields of biosensing, environmental governance and catalysis is remarkably improved. The method has the advantages of simple process, low cost, wide application range and the like, and provides a new way for large-scale application of nano materials.

The utility model provides a kind of foldable stainless steel turnover box, comprising: top frame, first hollow groove is arranged on the top frame through slide bar, hinged seat and support rod, the bottom end of the support rod bottom is rotatably connected with bottom frame through mounting shaft, the second hollow groove that is used in cooperation with support rod is set on the bottom frame, metal guard plate is set on the bottom of the top frame through hinge, metal guard plate is rotatably connected in vertical direction, bottom metal guard plate bottom is connected with bottom frame through hinge, slide plate and plug rod are set in the cavity in the inside of the top frame, the plug hole that is used in cooperation with plug rod is set on the hinged seat. The utility model under the action of hinged seat and slide bar sliding connection and support rod and bottom frame rotatable connection, the convenient folding and unfolding of turnover box is realized, storage space is greatly saved;The cooperation of plug rod and plug hole, in combination with the elastic effect of reset spring, the stability of support rod support state is guaranteed, and the use reliability of box body is improved.

The utility model relates to the technical field of integrated hypochlorous acid generators, and discloses an integrated hypochlorous acid generator capable of quickly adjusting pH value, which comprises a production tank support frame, the top surface of the production tank support frame is fixedly connected with a top cover plate, one side of the production tank support frame is internally provided with a salting cleaning assembly, and the other side of the production tank support frame is internally provided with a top cover plate. The bottom of the production tank body supporting frame is provided with a salting discharging assembly, the top surface of the production tank body supporting frame is fixedly connected with an internal adjusting box, the side surface and the bottom surface of the internal adjusting box are provided with PH detection assemblies, and the inner side of the internal adjusting box is provided with a PH adjusting assembly. The salinization cleaning assembly can efficiently clean residual salinization, and interference to production is avoided; the pH detection component and the adjusting component work cooperatively, so that the pH value of hypochlorous acid can be adjusted quickly and accurately, and various scene requirements are met; and the salting discharging assembly is convenient to operate, salting is convenient to discharge, and the equipment performance and the use convenience are integrally improved.

This utility model relates to the field of pipe processing technology and discloses an inlaid roller mold for preventing damage to the surface of pipe fittings during bending. The mold includes a base, a mounting plate fixedly mounted on the top of the base, an L-shaped plate fixedly mounted on the top of the mounting plate, a cylinder fixedly mounted on the top of the base, two bending rollers symmetrically arranged on the front side of the L-shaped plate, an adjustment component on the rear side of the L-shaped plate, and a lifting component at the output end of the cylinder. This utility model avoids sliding friction between the mold and the pipe fitting by using rollers to contact the pipe fitting surface, thus preventing surface damage. Furthermore, the rollers act as guides during bending, ensuring the pipe fitting moves along a preset bending path. The rollers also distribute the concentrated pressure during bending to multiple contact points, preventing localized deformation or damage to the pipe fitting. The distance between the two bending rollers can be adjusted to accommodate different bending sizes.

The invention belongs to the technical field of electric power intelligent dispatching, and particularly discloses a self-adaptive household power supply management system and a management method thereof, and the system comprises a multi-port bidirectional conversion module, a central processing unit, a multi-mode sensing unit and an intelligent execution unit, load characteristics, environment states, user preferences and power grid and energy state data are collected through a multi-mode sensing unit; based on the collected data, executing a dynamic priority scheduling algorithm through a central processing unit, calculating a dynamic priority coefficient of each load and generating a scheduling decision; according to the scheduling decision, controlling the energy flow direction of a multi-port bidirectional conversion module and the power supply operation of an intelligent execution unit on a load; load identity and state are identified through multi-dimensional electrical characteristics, fine energy scheduling is realized, economy, comfort and safety are balanced, and system toughness and adaptive capacity are improved.

The utility model relates to mahjong machine technical field, concretely relates to a mahjong machine with multi -surface control panel, including mahjong machine outer frame and outer frame batten, the desktop of mahjong machine is provided with the lifting panel, the four sides of mahjong machine are provided with the mounting groove, and the control panel is arranged in each mounting groove, the lifting panel is electrically connected with the control panel. The mounting groove and control panel rotatable connection are connected, the both sides of control panel are provided with rotating shaft respectively, and the both sides of mounting groove are provided with the mounting hole coaxial with rotating shaft respectively, and rotating shaft can be inserted into the inside of mounting hole. The upper side of control panel is provided with the lug, and the inside of mounting groove is provided with the guide sliding slot, and the lug slides in the guide sliding slot. The utility model solves the technical problem that the control panel of existing mahjong machine is set on the lifting panel and makes the control panel vulnerable to external factors interference, leads to false touch or damage, and makes the dice display area compression and leads to the technical problem of insufficient visibility.

This utility model discloses a biomass fuel extrusion molding device, belonging to the technical field of biomass fuel production equipment. It includes a collection shell, with an adjustment component fixedly installed in the middle of the lower surface of the collection shell, and a material storage component fixedly connected to the inner bottom wall of the collection shell. The adjustment component controls the rotation amplitude of the inner box to adjust the overlap range between the first and second discharge troughs, thereby achieving continuous adjustment of the size of the extruded biomass fuel. This meets the diverse fuel specifications required by different combustion equipment, and eliminates the need to replace molds or the entire equipment, effectively reducing equipment replacement and maintenance costs. It also improves production flexibility and efficiency, enhances equipment adaptability and ease of operation. The material storage component allows for thorough cleaning and maintenance of the outer box interior by removing the lid, effectively preventing blockages or contamination caused by material residue and ensuring the stability of equipment operation and molding quality.

This application provides a self-locking switch and a docking station. The self-locking switch includes a housing, a locking member, and a rocker arm. The housing has a receiving cavity, and at least a portion of the rocker arm is located within the receiving cavity. The self-locking switch has a locked state and an unlocked state. When the self-locking switch is in the locked state, the locking member is connected to the rocker arm to restrict the rocker arm's movement. When the self-locking switch is in the unlocked state, the locking member is disengaged from the rocker arm to prevent the rocker arm's movement. The locking member is movably disposed within the receiving cavity to allow the self-locking switch to switch between the locked and unlocked states. The self-locking switch of this application embodiment has high reliability.

The utility model discloses an outdoor dining table convenient to fold and store, and relates to the technical field of outdoor dining tables, the outdoor dining table convenient to fold and store comprises four bearing rods, a table plate is arranged above the four bearing rods, side plates are rotatably connected to the two sides of the table plate, a storage mechanism is arranged at the tops of the bearing rods, and the storage mechanism comprises a storage assembly and a stabilizing assembly. The storage assembly and the stabilizing assembly are used in cooperation, the storage assembly comprises rotating blocks, the rotating blocks are symmetrically and fixedly connected to the outer side of the bearing rod, rotating plates are rotationally connected to the interiors of the rotating blocks, and the two rotating plates on the same side are rotationally connected. According to the outdoor dining table convenient to fold and store, through the arrangement of the storage mechanism, the outdoor dining table can be rapidly folded and unfolded, storage and carrying are convenient, a large space is not occupied in the transportation process, the transportation and use cost is reduced, the use comfort is improved, the structure is simple, and practicability is high.

This utility model relates to an auxiliary device for conveying bearing rings in bearing production. The adjusting rod can slide left and right along the support member, and the guide plate can slide back and forth along the first sliding member. Combined with the positioning function of the elastic positioning component, the distance and position between the two guide plates can be flexibly adjusted to adapt to bearing rings of different diameters and thicknesses. The auxiliary device does not need to be frequently replaced, which reduces equipment costs and improves production efficiency. The adjusting rod and the first sliding member are hinged, allowing the guide plate to rotate around the hinge point to adjust the angle, thereby forming a figure-eight structure between the two guide plates. This figure-eight structure can automatically gather the bearing rings towards the centerline or a specified direction during the conveying process, preventing the bearing rings from deviating or scattering, ensuring stable conveying posture, and providing a precise positioning basis for subsequent processing, inspection and other processes.

The utility model discloses a lower limbs non -weight bearing state rehabilitation brace, including two supports, the support includes the thigh support pole and shank support pole, the thigh support pole is connected with the shank support pole through being equipped with the swivel base component between, one end of the thigh support pole is connected with the connecting rod through the swivel base component, the connecting rod top is equipped with fixed block, one side of fixed block is equipped with waist binding subassembly, the both sides of two thigh support poles and the both sides of two shank support poles are equipped with leg binding subassembly. The utility model discloses a lower limbs non -weight bearing state rehabilitation brace compares with prior art, can adapt to the patient of different height leg length and different waistline, and the wearing is convenient and comfortable, and the brace is bound through the waist, effectively disperses the body weight, can elevate whole lower limbs, alleviates the burden of the affected limb, especially applicable to the fracture serious, postoperative early rehabilitation or acute ligament injury patient, helps to reduce the force of the affected limb, prevents the disease aggravation.

This invention discloses a method for preparing and applying an antibacterial composite coating based on quaternized zinc oxide nanoparticles. The preparation method includes: grafting quaternary ammonium salt compounds onto the surface of zinc oxide nanoparticles to prepare synergistic antibacterial nanoparticles; modifying the substrate surface by co-deposition of dopamine and polyethyleneimine to introduce active functional groups; and spraying or dipping the quaternized zinc oxide nanoparticles onto the modified substrate surface to obtain the antibacterial composite coating. This novel antibacterial material preparation scheme can integrate the advantages of zinc oxide nanoparticles and quaternary ammonium salts, while solving key technical problems such as nanoparticle aggregation, weak interfacial bonding, and limited antibacterial efficiency. It is of great significance for promoting the upgrading of hygiene and safety in the fields of medicine, food, and building materials.

The utility model provides a guide rail pair of integrated displacement detection function, including track and the slide block of slidable setting on the track along front -back direction, the upper surface fixed setting of track has the magnetic scale along its length direction extension, the front end fixed setting of slide block has fixed block, the bottom surface of fixed block is parallel to the upper surface of track and is fixed with hall induction magnetic head, hall induction magnetic head is towards the magnetic scale and with the magnetic scale mutual magnetic induction, hall induction magnetic head passes through the cable and the controller electricity of outside connection. The utility model discloses compact structure, convenient to install and integrated measurement function.

The utility model relates to a kind of soft roll cover structure of pickup tail box, and its technical solution main points are: including: cover body;At least one supporting module is installed on the cover body, and the binding module for the binding treatment of cover body after winding is used;The both ends of the cover body are respectively provided with the connecting frame for being connected with pickup tail box rack;Two mounting parts for being connected and mounted with rollover prevention frame product are provided on the both sides of the cover body;At least one quick connector is respectively provided on the mounting part;Overall structure is stable, easy to install, the mounting part for installing quick connector product is set on the both sides of pickup rear box soft roll cover, so that after pickup rear box soft roll cover is installed, there is still enough space for installing pickup truck rollover prevention frame product, the problem that folding appears on the both sides of tail box soft roll cover in use process, affecting the shading and waterproof effect of tail box soft roll cover can be effectively avoided.

This invention discloses an anti-theft alarm fastener. By integrating a position detection module, a control module, and an alarm module into the male and female buckles of an existing magnetic fastener, it achieves real-time monitoring of the fastener's connection status and automatic alarm functions upon unauthorized separation. The control module, with its function selection button, allows the fastener to flexibly switch between at least two operating modes: alarm function off or on. This greatly improves the product's practicality and applicability, meeting diverse user needs in different situations. The position detection module uses a magnetic trigger and a Hall sensor element to form a non-contact position detection module, avoiding reliability issues caused by contact oxidation, wear, or poor contact in traditional mechanical switches. Furthermore, the mating structure of the mounting groove and positioning recess improves the accuracy and consistency of detection, effectively avoiding misjudgments or missed alarms due to positional misalignment.

This specification provides a form generation method, apparatus, and device, applicable to the field of artificial intelligence technology. The method includes: receiving a form generation request; the form generation request containing form definition information; the form definition information describing the table structure of the form to be generated; obtaining an initial template corresponding to the form generation request; determining recommended form parameters based on the form definition information; the recommended form parameters being used to construct the structure and type of the generated form based on the template; combining the recommended form parameters with the initial template to obtain an application template; the application template including a program for generating the form; and generating a target form corresponding to the form generation request based on the application template. This method meets diverse form requirements, enabling users to obtain the required forms promptly and effectively, facilitating business execution and improving user experience.

A method of manufacturing an electronic device is provided. The method includes the following steps. A first substrate including a plurality of chips is provided. A second substrate is provided. A transfer procedure is performed to sequentially transfer a first chip and a second chip of the chips onto the second substrate. The second chip is adjacent to the first chip. A first extension direction of a first side edge of the first chip and an extension direction of a first boundary of the second substrate form a first included angle. A second extension direction of a second side edge of the second chip and the extension direction of the first boundary of the second substrate form a second included angle. The first included angle is different from the second included angle.

The utility model relates to the technical field of artificial leather production and processing devices, and provides artificial leather softness detection equipment which comprises a base table, a plurality of bearing tables fixedly arranged on the outer surface of the base table, a plurality of artificial leather placing grooves formed in the outer surfaces of the bearing tables respectively, a top frame fixedly arranged on the outer surface of the base table, and a driving assembly arranged on the top frame. The device is provided with a structure capable of detecting the softness of artificial leather samples with different thicknesses, so that the softness characteristic of a material can be truly reflected, device detection data distortion caused by too thick or too thin artificial leather samples is avoided, device detection errors are reduced, the device can meet diversified requirements, the practicability of the device is improved, and the universal application range of the device is widened. A structure capable of synchronously detecting the softness of a plurality of artificial leather samples is designed, so that the detection efficiency of the device is improved, a plurality of samples can be detected at a time, the batch detection speed is improved, data comparison is facilitated, and the labor and time cost is reduced.

The invention discloses an anticorrosive coating as well as a preparation method and application thereof, and relates to the technical field of high polymer materials and metal corrosion protection. The anticorrosive paint comprises the following components which are independently subpackaged: a component A: an epoxy resin prepolymer; component B: an epoxy resin curing agent, wherein the epoxy resin curing agent comprises an amino curing agent; component C: a functional molecule, wherein the functional molecule comprises alpha-lipoic acid. The coating has an innovative self-layering structure, so that the coating has a lotus leaf effect-like hydrophobic surface and super glue-like base layer adhesion at the same time, and the contradiction that the hydrophobicity and the adhesion force of a traditional coating are difficult to consider at the same time is solved. The existence of the dynamic disulfide bond not only endows intelligent release and potential self-repairing functions, but also provides possibility for degradation and chemical recovery of the coating material after the life cycle is ended, and conforms to the concepts of green chemistry and sustainable development.

This application discloses an adaptive inventory management method and apparatus for multi-tenant environments. The method includes: receiving an inventory operation request from a target tenant, the request carrying a target tenant identifier and an operation type; obtaining a target control mode corresponding to the target tenant identifier, including a forced source mode, a weak source mode, and a source-and-no-source coexistence mode. The forced source mode allows the creation of documents associated with upstream orders, the weak source mode allows the creation of multi-source documents and automatically adjusts process nodes, and the source-and-no-source coexistence mode allows both source-based and source-less operations; adjusting the operation permissions of preset business process nodes according to the target control mode to obtain the target business process node adapted to the request; and updating the inventory status based on the operation type and the target business process node to obtain the inventory operation execution result. Using this application, the needs of medium-sized enterprises of different sizes and business models can be adapted to the differentiated requirements of two types of documents under multi-tenant environments.

The utility model provides a multi-mode screen window roller shutter installation structural member which is used for solving the technical problems that an existing door window needs to be independently provided with a screen window roller shutter, installation is troublesome, and attractiveness is poor. Comprising an upper frame and a blocking frame installed on the bottom end face of the upper frame in a buckled mode. A first baffle is arranged at one end of the upper frame, a first clamping groove is formed between the first baffle and the blocking frame, and a roller shutter module is installed in the first clamping groove or a sealing plate is installed at the opening position of the first clamping groove in a buckled mode. The first clamping groove is formed in the upper frame, the electric or manual roller shutter module or the sealing plate is selectively installed in the first clamping groove, diversified requirements of customers are met, meanwhile, when the roller shutter module is installed, holes do not need to be punched in a wall, the roller shutter module is located on the outer side of the sliding window sash, the attractiveness is good, and installation is convenient.

According to the multifunctional high-definition audio decoding equipment and the audio system, a user interaction module, a data expansion module, an audio processing module, an earphone amplification module, a power supply management module and an audio output interface are integrated in a machine shell, so that the functions of high-definition decoding, interface expansion and MAC (Media Access Control) startup are realized, desktop wiring is simplified, and the cost is reduced. The problem that an MAC user is inconvenient to start up is solved, user experience is improved, in addition, the audio processing module supports the most advanced high-resolution audio format at present through the combination of an XMOS XU-316 USB audio controller and an ESS ES9039Q2M DAC chip, complete MQA rendering is included, reference-level tone quality performance is provided, an audio output interface provides multiple output interfaces, and the audio processing module is suitable for being used by a user. Diversified requirements of a user for connecting earphones, sound boxes and other digital devices are met, and adaptability is high.

This utility model discloses an FA fiber array polishing angle adjustment structure, relating to the field of FA fiber array polishing technology. The technical solution includes a fiber polishing machine with a vertical drive assembly on top and an angle drive connecting frame connected to one side of the vertical drive assembly. The beneficial effects of this FA fiber array polishing angle adjustment structure are: through the three-dimensional linkage of the vertical drive assembly, the angle drive connecting frame, and the angle adjustment assembly, a multi-degree-of-freedom adjustment system of "height-horizontal angle-rotation" is constructed. Servo motor two, in conjunction with threaded rod two, can achieve continuous adjustment of the horizontal angle from 3° to 60°. Servo motor three drives the fiber rotation, and combined with the movement of the polishing disc, it can precisely process complex end faces such as conical, wedge-shaped, and spherical shapes, breaking through the limitations of traditional equipment that can only polish in a plane or at a single angle, and meeting the diverse needs of high-speed optical communication, fiber optic sensing, and other fields.

The utility model discloses a kind of magnetic suction type wireless charging, cold compress handheld folding fan, including fan main body, the fan main body adopts folding design, the fan main body includes upper shell and lower shell, the lower side of the rear end of upper shell is equipped with connecting barrel one, the upper side of the rear end of lower shell is equipped with connecting barrel two, the connecting barrel two is rotated and connected in connecting barrel one inside by pivot;The magnetic attraction piece is arranged at the lower end inside lower shell;The wireless charging structure is arranged in the inside of lower shell;The cold compress structure includes semiconductor refrigerating sheet, the semiconductor refrigerating sheet is arranged in the inside of upper shell, the front end of upper shell is equipped with cold conduction metal sheet.The utility model is compared with prior art's advantage lies in: handheld fan, magnetic attraction fixed, wireless charging and cold compress function are integrated, provide multiple practical functions for user, meet the diversification needs of user in different scenarios, greatly improve the practicality and convenience of product.

This disclosure relates to the field of vehicle technology, specifically to an air spring assembly and its housing component, a suspension system, and a vehicle. The housing component of the air spring assembly includes a first chamber and a second chamber arranged at intervals. The first chamber is used to house a shock absorber. The first and second chambers are communicable and disconnectable. The housing component is a plastic part and includes a housing and a housing seat arranged sequentially from top to bottom. The top end of the housing seat is connected to the bottom end of the housing. The housing and housing seat are separately disposed. The first chamber includes an upper chamber and a lower chamber that are opposite to and communicate with each other in the vertical direction. The upper chamber is formed in the housing, and the lower chamber is formed in the housing seat. The second chamber is formed in at least one of the housing and the housing seat. The housing component of the air spring assembly of the embodiments of this disclosure reduces manufacturing difficulty, and its outer peripheral shape can be adapted to fit with other components.

The utility model discloses a kind of seedling nutrient soil crushing screening machines, belong to seedling nutrient soil production technical field, the crushing screening machine includes the upper cover fixedly arranged on collecting base, upper cover is provided with inlet;Screening part is fixedly arranged on collecting base, and screening part includes several screen meshes, and screening part is also provided with waste port, and screen mesh has different size screening hole;Scraping part is rotatably arranged on collecting base, and scraping part includes scraper plate rotatably arranged on collecting base, and scraper plate is attached on screen mesh;Among them, these screen meshes form a conical structure in combination.This utility model's advantage is that: nutrient soil falls on screen mesh, will drop into collecting base through different screening hole thereon, simultaneously, scraper plate rotates around screen mesh, and the seedling nutrient soil of screen mesh is scraped from one screen mesh to another, to reach the purpose of grading screening, finally make the equipment have the ability of screening seedling nutrient soil of different aperture.