27results about How to "Improve grading effect" patented technology

The invention discloses a high-efficiency multiphase flow classification and separation integrated treatment method for argillaceous sandstone uranium ore. The crushed argillaceous sandstone uranium ore mixed material is sequentially subjected to hydraulic polishing and cluster breaking treatment, high-frequency linear vibration grading treatment, first-stage multiphase flow rotational flow grading treatment, deep low-frequency efficient ultrasonic scrubbing treatment, second-stage multiphase flow rotational flow grading treatment, jet flow uniform mixing treatment, micro-current activating treatment, hardening and tempering thickening and efficient squeezing solid-liquid separation treatment. According to the invention, mud and sand deep stripping and material fine grading separation of the crushed argillaceous sandstone uranium ore are realized, meanwhile, the fine-particle argillaceous material is subjected to efficient uniform mixing activation and deep efficient dehydration, and four core materials, namely a coarse sand material, a fine sand material, tailing dry slag and a high-concentration uranium ore leaching solution, are finally formed through continuous work; finally, efficient multi-phase flow fractional separation, concentration and purification treatment of the argillaceous sandstone uranium ore is achieved, residues of uranium elements in tailings are reduced, and the deep extraction rate of uranium ore resources is increased.

The invention belongs to the field of space earth observation technology and application, and discloses a remote sensing image stony desertification grading method, device and equipment based on a feature space, and the method comprises the steps: obtaining a remote sensing image, elevation data DEM and land utilization data of a research area, and carrying out the preprocessing; terrain correction is carried out on the area with the gradient larger than 25 degrees through an SCS + C terrain correction model; constructing a rock index RCRI and a vegetation index NDRE, and performing normalization; an RCRI-NDRE feature space is constructed; constructing a stony desertification index according to a distance formula from a point to a straight line; high-resolution remote sensing images are used for assisting visual interpretation of stony desertification sample points of different degrees, and grading thresholds between stony desertification of different degrees in the RCRI-NDRE feature space are calculated; and stony desertification grading is carried out based on the grading threshold value, and distribution conditions of stony desertification of different degrees are obtained. According to the method, remote sensing image data are extracted, and the RCRI-NDRE feature space of the rock index RCRI and the vegetation index NDRE is constructed, so that different degrees of stony desertification grading of the target area can be realized.

The invention belongs to the technical field of unmanned aerial vehicle inspection, and particularly relates to an unmanned aerial vehicle insulator inspection system and method based on multi-light fusion. Comprising an unmanned aerial vehicle platform and a ground control station. The unmanned aerial vehicle platform is used for carrying inspection equipment and inspecting the insulator according to a preset path; comprising an unmanned aerial vehicle body, a multi-light fusion sensor module, a data processing module, a control module and a communication module, the multi-light fusion sensor module integrates a visible light sensor, an infrared sensor and an ultraviolet sensor and is used for acquiring visible light image information, infrared thermal image information and ultraviolet image information of the insulator, potential faults can be found in the early stage through the three-light fusion technology, and important data support is provided for preventive maintenance; through integration of data of different wavelengths, insulator fault diagnosis under the three-light fusion technology reduces the possibility of misjudgment of insulator faults, and high detection reliability and high efficiency can be maintained under various environmental conditions.

The utility model discloses a high-precision airflow classifier, and relates to the technical field of sorting. The high-precision airflow classifier comprises an airflow classifier shell and a classification device, the classification device comprises a feeding port, the feeding port is fixedly connected to the upper end of the airflow classifier shell and extends into the airflow classifier shell, the upper end of the feeding port is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with a rotating shaft; the lower end of the rotating shaft is fixedly connected with a dispersing disc, the surface of the dispersing disc is fixedly connected with baffles, the surface of the dispersing disc is rotationally connected with blades, and resin raw material particles collide with the baffles and the blades through the centrifugal effect of rotation of the dispersing disc, so that the resin raw materials are scattered, and the resin raw materials are evenly distributed in the airflow classifier shell; the uniform distribution ensures that the resin raw materials can be subjected to uniform airflow and centrifugal force, so that the stability and precision of the grading process are improved, and the grading efficiency of the device is improved.

The invention discloses an acne grading method, system and equipment based on multi-modal fusion and a medium, belongs to facial acne severity grading in the technical field of artificial intelligence, and aims to solve the technical problem of poor facial acne severity grading effect in the prior art. A constructed facial acne grading model comprises a VGG feature extraction module, a multi-modal feature fusion module, an acne feature sensing module and a comprehensive grading module, the VGG feature extraction module extracts facial features in different modals, and the multi-modal feature fusion module models the relation between the facial features in different modals through cross attention for fusion. The acne feature sensing module enhances the sensing of acne features through a cross attention mechanism, and the comprehensive grading module makes a comprehensive and accurate acne severity grading result. According to the method, comprehensive grading of the severity of the acnes is realized by combining the multi-modal face pictures of the patient, and the grading effect of the severity of the facial acnes is greatly improved.

A Raymond mill operation grading prediction and evaluation method aims at solving the problem that related processing modes capable of correspondingly evaluating grading efficiency and whole machine pressure loss of a Raymond mill do not exist at present, the prediction and evaluation method in the invention is based on an inlet wind speed D, a main shaft rotating speed E and a grader rotating speed F, and through combination of a Box-Behnken method, a DPM model and an MRF multi-coordinate reference system, the grading efficiency and the whole machine pressure loss of the Raymond mill can be evaluated, and the grading efficiency and the whole machine pressure loss of the Raymond mill can be evaluated. And performing response surface simulation analysis by using the R-R distributed discrete phase, and calculating to obtain the maximum value of the grading efficiency M and the minimum value of the complete machine pressure loss N, and completing the contrastive analysis process with the actually acquired data according to the maximum value of the grading efficiency M and the minimum value of the complete machine pressure loss N.

The invention provides a bundled tobacco leaf automatic grading method based on fine-grained classification, and belongs to the technical field of tobacco leaf intelligent grading, and the method comprises the steps: obtaining a bundled tobacco leaf image through a bundled tobacco leaf image collection hardware platform, and carrying out the preprocessing; constructing a bundled tobacco leaf automatic grading network model; guiding data enhancement by using an attention map, and designing fine-grained grading loss; using anti-attention learning to supervise attention map quality; and detecting a to-be-detected bundled tobacco leaf image by using the trained bundled tobacco leaf automatic grading model to obtain a grading result of the bundled tobacco leaves. The method can achieve the grading accuracy of the bundled tobacco leaves to the maximum extent, can effectively improve the efficiency and objectivity of tobacco leaf purchasing, and promotes the process of automatic tobacco leaf purchasing.

The utility model provides an alloy grading screening device, which belongs to the technical field of alloy screening and comprises a screening box, and a feed inlet and an exhaust inlet are arranged at the top of the screening box. A screen plate assembly and a screen mesh assembly which are obliquely arranged are installed in the screening box. The oblique low end of the screen plate assembly is connected with a screen plate discharging table. The inclined low end of the screen assembly is connected with the screen discharging table. A material collecting cavity is formed by the screen assembly and the bottom of the screening box, and one side of the material collecting cavity is connected with a material collecting and discharging table; a material pushing mechanism is arranged in the material collecting cavity and comprises a reciprocating screw rod and a guide rod which are parallel to the bottom of the screening box, the reciprocating screw rod and the guide rod are sleeved with a push plate, and the bottom of the push plate abuts against the bottom of the screening box; a servo motor is arranged outside the side wall of the screening box, and the output end of the servo motor is connected with the reciprocating lead screw. When the device runs, materials are in a relatively sealed environment, raised dust is not easy to generate, the working environment is improved, the screening and grading effects of the materials are improved through the design of the multi-stage screen, and the waste rate of products is reduced.

The utility model relates to the field of flour processing, in particular to a multiple material uniformizing structure which comprises a feeding box, a material uniformizing box arranged in the feeding box, a feeding port formed in the top end of the material uniformizing box, an opening formed in the bottom of the left end of the material uniformizing box and an elastic plate arranged at the bottom of the material uniformizing box. The right end of the elastic plate is connected with a movable plate inclining towards the lower right portion, a mounting vertical plate is arranged at the right end of the movable plate, an adjusting plate capable of being adjusted up and down is arranged on the mounting vertical plate, and a plurality of crescent grooves are formed in the bottom edge of the adjusting plate in the length direction. And a material dripping plate inclining towards the right lower portion is arranged below the movable plate, a material uniformizing plate inclining towards the right lower portion is arranged below the material dripping plate, and a discharging opening is formed in the upper portion of the left end of the material uniformizing plate. According to the utility model, a material uniformizing mode in a feeding system is changed into a multiple material uniformizing structure, so that material uniformizing is more effective than that of an original single material uniformizing structure, materials are stable and uniform when entering the sieve body, and the sieving and grading effects are effectively improved.

The invention relates to a fruit and vegetable grading method, which solves the technical problems of low accuracy and low efficiency of grading according to the texture and color of a fruit and vegetable image through computer vision in the prior art, and comprises the following steps of: acquiring a cucumber image for the first time, and manually marking the cucumber image to construct a cucumber key point detection data set; secondly, constructing a neural network model for detecting the key points of the cucumbers; calculating the arch height, transverse diameter difference and cucumber stem ratio indexes of the cucumber according to the cucumber key points obtained by the cucumber key point detection model, and finally judging the grade of the cucumber according to the indexes.

The application discloses a kind of for the method, device, equipment and medium of tab abnormality detection in battery cell production process, comprising: the tab area image collected in battery cell production process is segmented to generate tab mask;Based on the tab mask extraction multi-scale pixel-level feature vector, and the multi-scale pixel-level feature vector is input into unsupervised probability GMM model to identify pixel-level abnormal point;The pixel-level abnormal point is analyzed to obtain candidate abnormal area, and the parameter index of the candidate abnormal area is obtained;Determine whether the parameter index meets the set tab abnormality judgment rule, if meet, it is judged as tab abnormality, and tab abnormality result is output.Therefore, the application can be widely applied to the detection of tab folding, crease, fracture, misplacement and other abnormalities on battery cell production line.

The utility model discloses an anti-blocking type bearing steel grit screening machine which comprises a screening box, an upper screening net and a lower screening net are fixed in the screening box, a fixing rod located on the top of the upper screening net is fixed in the screening box, a connecting ring is welded to the outer wall of the bottom of the fixing rod, a hook is connected into the connecting ring in a sleeved mode, and a connecting rope is fixed to the bottom of the hook. An impact ball is fixed to the bottom end of the connecting rope, an elastic plate is integrally formed at one end of the hook, a matching groove is formed in the hook, the elastic plate is located in the matching groove, and supporting legs are arranged at the bottom of the screen box. The top of the upper screen mesh and the top of the lower screen mesh are connected with the impact ball through the connecting rope, so that the impact ball vibrates off bearing steel grits blocked on the upper screen mesh and the lower screen mesh through impact, the screening machine is prevented from being blocked during working, the screening machine does not need to be frequently maintained, and due to the use of the upper screen mesh and the lower screen mesh, the service life of the screening machine is prolonged. And the bearing steel grits can be subjected to three-stage screening at a time, so that the grading effect is better when the bearing steel grits are screened.

The utility model relates to the technical field of grading devices, in particular to a calcium carbonate powder grading device which comprises a grading box body, the top of the grading box body is connected with a pretreatment box, a filter screen is arranged in the pretreatment box, a scattering mechanism is arranged above the filter screen, and a feeding hopper is installed at the top of the pretreatment box. A discharging pipe communicated to the interior of the grading box body is installed at the bottom of the pretreatment box, an electromagnetic valve is installed on the discharging pipe, a heavy powder outlet is formed in the position, right opposite to the discharging pipe, of the bottom of the grading box body, and a positive pressure air pipe is connected to the position, close to the heavy powder outlet, of one end of the grading box body; one end of the grading box body is connected with a positive-pressure air pipe, the positive-pressure air pipe is connected with a positive-pressure fan, the other end of the grading box body is connected with a negative-pressure air pipe, the negative-pressure air pipe is connected with a negative-pressure fan, and a light powder outlet is formed in the position, close to the negative-pressure air pipe, of the bottom of the grading box body; according to the utility model, caked powder is scattered, so that the grading effect is improved.

The utility model relates to a bearing protection device of mechanical grading mill, including frame, two main motors are installed to both sides of frame, the output of two main motors installs grading wheel drive, grinding disc drive respectively, grinding disc drive and grading wheel drive connect hollow shaft and solid axle through V type belt respectively, solid axle is placed in hollow axle hole, grinding disc is installed on hollow axle, and is inside the cavity of grinding cavity, grading wheel is installed on solid axle, and is above grinding disc inside the cavity, the upper and lower end of hollow axle is provided with big bearing respectively, and is supported by big bearing, the upper and lower end of solid axle is provided with small bearing respectively, and is supported by small bearing, the outer ring of grinding disc is provided with toothed grinding ring, the cavity of grinding cavity is provided with air guide ring below, and air guide ring is below toothed grinding ring, compared with prior art, the utility model can improve the service life of bearing, reduce the wear and tear and failure risk of bearing, and further improve the effect of equipment grinding and grading.

The present invention discloses an integrated treatment method for efficient multiphase flow grading and separation of muddy sandstone uranium ore, wherein the crushed mixed material of the muddy sandstone uranium ore is subjected to hydraulic washing and deagglomeration treatment, high-frequency linear vibration grading treatment, primary multiphase flow cyclone grading treatment, deep low-frequency high-efficiency ultrasonic scrubbing treatment, secondary multiphase flow cyclone grading treatment, jet mixing treatment, microcurrent activation treatment, tempering and concentration, and efficient squeezing solid-liquid separation treatment in sequence. The present invention realizes deep stripping of mud and sand of the crushed muddy sandstone uranium ore, fine grading and separation of materials, and at the same time, efficiently mixes and activates fine-grained muddy materials and dehydrates them deeply and efficiently. Four core materials are finally formed through continuous work, namely, coarse sand material, fine sand material, tailings dry slag and high-concentration uranium ore leaching solution, and finally realizes efficient multiphase flow grading, separation, concentration and purification treatment of muddy sandstone uranium ore, reduces the residual uranium element in the tailings, and improves the deep extraction rate of uranium ore resources.

The application discloses a transformer fault prediction method and system, and relates to the technical field of power equipment.The method comprises the following steps: collecting the start-stop action times of each time window, and determining the temperature control response lag coefficient of each time window by analyzing the temperature control lag level of the cooling control system in the power transformer when the cooling control system faces power mutation; analyzing the non-steady-state operation degree of the cooling control system in the corresponding time window to determine whether the temperature control state of the cooling control system affects the normal operation of the power transformer, and issuing a transformer fault prediction instruction; combining the power consumption drift and voltage frequency spectrum disturbance of the power transformer in each time window, analyzing the non-normal operation degree of the power transformer in the corresponding time window, performing digital model analysis on the non-normal operation index of the power transformer in each time window, generating a corresponding grade fault prediction signal, and performing corresponding voice broadcast reminding.

The application relates to a powder screening and collecting device in the field of powder manufacturing, which comprises the following: a ring-shaped frame; a mesh plate assembled in the ring-shaped frame, the mesh plate separating the ring-shaped frame into a first chamber and a second chamber; a material collecting bin assembled in the ring-shaped frame and located in the second chamber, a powder discharging port being formed on the side of the material collecting bin away from the mesh plate; a coarse particle discharging port arranged on the ring-shaped frame; and mirror surface treatment being performed on at least the surface of the mesh plate facing the first chamber, the surface of the material collecting bin facing the mesh plate and the inner side of the ring-shaped frame. The powder screening and collecting device can realize accurate screening of metal powder and coarse particles, reduce the abrasion of spherical metal powder, maintain the smoothness of the surface of the spherical metal powder and improve the use performance of the metal powder.

The utility model discloses belong to tailing dewatering purification technical field, concretely is a kind of metal mine tailing dewatering device, including primary cyclone classification unit, receiving flotation tailings and separating out overflow containing fine particle and bottom flow containing coarse particle, dehydration screening unit is connected with the bottom flow of the primary cyclone classification unit, for separating bottom flow into coarse sand on screen and undersize, secondary cyclone classification unit is connected with the undersize outlet of the dehydration screening unit, for undersize is classified again, closed circuit pipeline, the sand of the secondary cyclone classification unit is returned to the dehydration screening unit feed end, coarse sand collecting bin receives the coarse sand on screen of the dehydration screening unit and the sand of secondary cyclone classification unit respectively, and undersize is classified again by secondary cyclone, significantly improve +200 mesh coarse sand recovery rate, and through the design of anti-blocking closed circuit pipeline, combine mechanical propulsion and pneumatic auxiliary conveying, solve the problem of high-concentration tailings circulation easy to block.

The invention relates to the technical field of powder material airflow crushing and grading, in particular to an ultrafine powder airflow crushing and circulating grading device. Comprising a grading chamber, a crushing chamber and a flow guide assembly, the grading chamber is positioned at the top of the crushing chamber and is communicated with the crushing chamber; the lower portion of the crushing chamber working cavity is provided with a crushing area used for crushing fed materials, the upper portion of the crushing chamber working cavity is provided with a grading area, and a grading wheel is arranged in the grading area and used for guiding powder obtained after the fed materials are crushed into the grading chamber. The flow guide assembly is installed in the crushing chamber, a flow guide channel used for airflow to drive powder to flow is defined in the crushing chamber, the top of the flow guide channel communicates with the grading wheel of the grading area of the crushing chamber, and the bottom of the flow guide channel communicates with the crushing area of the crushing chamber. The device not only can improve the material crushing efficiency and the productivity, but also reduces the condition that a large amount of coarse powder abrades blades when the grading wheel rotates at a high speed, thereby prolonging the service life of equipment.

The invention provides a text grading method, a text grading device and a computer storage medium. The text grading method comprises the following steps: acquiring an extensible markup language file of a to-be-graded text file; extracting style information, position information and content information of each text in the extensible markup language file; extracting style position features based on the style information and the position information; extracting text content features based on the content information; splicing the style position feature and the text content feature into a text feature vector; and clustering all texts in the to-be-graded text file based on the text feature vector, and dividing the texts of different clusters into different text levels. By means of the text grading method, the style features, the position features and the text content features of the text are fused together to be used for text hierarchy division, and better grading performance can be obtained.

The application relates to the technical field of data processing, and discloses a vacuum pumping operation timing checking method, which is used for solving the problems of inaccurate timing judgment, untimely abnormality identification and insufficient operation record traceability in traditional methods, and affecting the standardization and safety of vacuum pumping operation. The method first collects vacuum degree, temperature, flow, valve state and operation declaration information, and carries out unified time base alignment; determines an operation session and extracts a process node according to the aligned multi-source data, combines a process procedure to establish a checking rule, corrects start and end nodes of each process, and constructs an operation timing chain; then, the process duration, process sequence and process interval are checked, and interlocking control, alarm output and record archiving are executed according to the checking conclusion, so that the accuracy of vacuum pumping operation timing judgment, the timeliness of abnormality disposal and the process traceability are improved.

This invention discloses a flexible airflow fruit grading device, comprising: a support frame fixedly mounted on the ground, with a first support plate fixedly mounted at one end and a second support plate fixedly mounted at the other end; a fruit collecting mechanism fixedly mounted on the first support plate, the fruit collecting mechanism having a fruit outlet; a fruit transport pipe with its inlet fixedly mounted on the fruit outlet, the fruit transport pipe including a large fruit outlet, a small fruit outlet and an exhaust port; a controllable air source fixedly mounted horizontally on the ground, the controllable air source being connected to the exhaust port of the fruit transport pipe for extracting gas from the fruit transport pipe, adjusting the negative pressure of the gas inside the fruit transport pipe, thereby minimizing collisions of the fruits during transport; and a fruit grading collection box, the inlet of which is fixedly connected to the large fruit outlet and the small fruit outlet.

The utility model discloses a ball mill lining structure which comprises a first lining plate and a second lining plate, the first lining plate and the second lining plate are alternately mounted on the inner wall of a ball mill, a mounting plate is fixed to the first lining plate, an activation lining plate is detachably mounted on the mounting plate, a through groove is formed in the activation lining plate, and a sieve plate is mounted in the through groove; a baffle is fixed to the second inner lining plate, the multiple activation lining plates and the multiple baffles on the same plane jointly form a material blocking ring, a fixing plate is fixed to one side of the mounting plate, a mounting groove is formed in the fixing plate, and one side of each activation lining plate is located in the mounting groove. According to the utility model, the mounting plate is fixed on the lining plate, so that a complete lining is formed in the ball mill, meanwhile, the activation lining plate can be independently detached, a detaching space is reserved through the baffle, maintenance and replacement are facilitated, and the sieve plate is mounted on the activation lining plate, so that the screening efficiency is further improved, and the ball mill is more uniform in discharging and finer in fineness.

The invention discloses wall breaking equipment and an energy-saving ganoderma lucidum spore powder preparation method, and relates to the field of wall breaking equipment, the wall breaking equipment and the energy-saving ganoderma lucidum spore powder preparation method are included, the wall breaking equipment comprises a feeding pipe, an air inlet pipe and a smashing shell, the smashing shell is annularly arranged, and the feeding pipe and the air inlet pipe are both communicated with the smashing shell; and a discharging pipe is fixed to and communicates with the top of the crushing shell, a grading assembly is arranged on the discharging pipe, and the grading assembly comprises a grading wheel, a discharging pipe and a driving unit. The large-particle materials can be discharged and enter the smashing shell again to be smashed, the large-particle materials are prevented from moving towards the grading wheel again under the action of airflow after being centrifuged, the probability that grading strip holes in the grading wheel are clamped by the large-particle materials is reduced, the large-particle material powder clamped in the grading strip holes is pushed out through a cleaning plate, and therefore the grading wheel is convenient to clean. And the materials enter the grading shell along with centrifugation of the grading wheel, the situation that a large number of large-particle materials are clamped in the grading strip holes, and consequently small-particle materials cannot pass through the grading strip holes is prevented, and the grading efficiency of the grading wheel is improved.

The utility model relates to the technical field of graded storage of fine iron powder, and provides graded storage equipment for fine iron powder, which comprises a storage tank, a plurality of graded sieve plates, a mounting seat, a stirring shaft, a stirring component, a screw rod and a scraping mechanism, a plurality of graded sieve plates are vertically arranged in the storage tank, and the upper side of the storage tank is communicated with a feeding hopper through a feeding pipeline; the storage tank is rotatably mounted on the upper side of the mounting seat, a bottom support is mounted on the lower side of the mounting seat, a driving part for driving the storage tank to rotate is arranged on the mounting seat, the stirring shaft is rotatably mounted on the inner top wall of the storage tank, a driving part for driving the stirring shaft to rotate is arranged on the upper side of the storage tank, and a plurality of groups of stirring assemblies are vertically mounted on the stirring shaft. By means of the technical scheme, the problems that in the prior art, fine iron powder with different particle densities and sizes is screened in a gravity settling mode, so that the separation speed of the fine iron powder is low, and the working efficiency is poor are solved.

The invention relates to the technical field of sorting equipment, in particular to an intelligent photoelectric material sorting large-middle and small-two-side screening and distributing device. Comprising a material distribution box and a material distribution support arranged below the material distribution box. A feeding hole is formed in the upper end of the material distribution box; a discharge hole is formed in the front side of the distribution box; a plurality of guide plates are uniformly arranged at the discharge hole from top to bottom; the discharging ends of the multiple material guiding plates are gradually distributed towards the two sides from top to bottom. The height of the material guide plate is reduced along with the distance from the material distribution box; materials of different specifications are screened and intercepted through the material distribution gaps with different intervals, the materials fall into different material guide plates in a grading mode, and under the guiding of the discharging ends at different positions of the material guide plates, the materials are large in the middle and small in the two sides after falling onto the vibration material distributor, so that the problem that blocking is caused when the materials are recognized through a light source is avoided; and the ray identification precision and the sorting precision are improved.

The invention discloses a high-tap-density hard carbon material and a preparation method and application thereof.According to the high-tap-density hard carbon material and the preparation method and application thereof, crystalline flake graphite powder is subjected to surface oxidation treatment through concentrated nitric acid, then polyethyleneimine is grafted to the surface of the crystalline flake graphite powder, and the dispersity of the crystalline flake graphite powder in epoxy resin is improved; meanwhile, the long-chain alkyl structure of the polyethyleneimine can promote the rearrangement of a carbon layer in the carbonization process and adjust the pore structure of the hard carbon material, so that the electrochemical performance of the hard carbon material is improved; in addition, the polyethyleneimine contains a large number of amino groups, and the electrochemical performance of the hard carbon material is further improved through nitrogen doping; then, the carbonized material is subjected to tabletting treatment, carbonized material particles are rearranged again, particle gaps are further reduced, a compact stacking state is formed, meanwhile, under the action of pressure, part of the particles deform, the grading effect is better after high-temperature calcination, and the effect of improving the tap density of the material is achieved.