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257 results about "Filling ratio" patented technology

Fill rate is the ratio of job orders received to job orders filled. When the fill rate begins to decline, it should be taken as a warning sign, says an expert at Talent Plus Staffing, a company that takes pride in their 85% fill ratio, as compared to the industry average of 46%.

House pillar type cutting and filling method of medium coal seam for controlling movement deformation of overlying rock

The invention belongs to the field of coal cutting and filling, in particular to a house pillar type cutting and filling method of the medium coal seam for controlling the movement deformation of the overlying rock, which is suitable for the coal face with the coal seam thickness more than 2 meters. The method comprises the following steps: determining the initial weighting interval L and the periodic weighting interval M of the main roof according to the main roof initial weighting interval theory; arranging the rooms and the coal pillars at intervals; and using the material with high expansibility in water during the filling according to the method comprising the following steps of mining the rooms, filling the empty rooms, mining the coal pillars and filling the empty zones of the coal pillars. The method provided by the invention can determine the most economical filling ratio through controlling the key layer to maximize the benefits; the method provided by the invention can control the movement deformation of the overlying rock absolutely within the allowed range when realizing the pulling without pillars, and realize the extremely small gentle uniform sinking of the ground; and the method provided by the invention can realize the mining of the coal resource with high recovery rate under any condition by using the material with high expansibility in water, and greatly enhance the security of coal face. When the rooms are mined, a plurality of coal face of rooms can be arranged at intervals to enhance the working efficiency.
Owner:ZIBO WANGZHUANG COAL MINE

Soft sensing method for load parameter of ball mill

ActiveCN101776531AThe frequency band features are obviousObvious high frequency featuresSubsonic/sonic/ultrasonic wave measurementCurrent/voltage measurementLeast squares support vector machineEngineering
The invention relates to a soft sensing method for load parameters of a ball mill. The method is that a hardware supporting platform is used to obtain vibration signals, vibration sound signals and current signals of a ball mill cylinder to soft sense ball mill internal parameters (ratio of material to ball, pulp density and filling ratio) characterizing ball mill load. The method comprises the following steps that: the vibration, the vibration sound, the current data and the time-domain filtering of the ball mill cylinder are acquired, time frequency conversion is conducted to the vibration and the vibration sound data, kernel principal component analysis based nonlinear features of the sub band of the vibration and the vibration sound data in frequency domain are extracted, nonlinear features of the time domain current data are extracted, feature selection is conducted to the fused nonlinear feature data and a soft sensing model based on a least squares support vector machine is established. The soft sensing method of the invention has the advantages that the sensitivity is high, the sensed results are accurate, the practical value and the popularization prospect are very good, and the realization of the stability control, the optimization control, the energy saving and the consumption reduction of the grinding production process is facilitated.
Owner:NORTHEASTERN UNIV

Device and method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water

The invention discloses a device and a method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water. The device comprises a raw water tank, a water inlet pump, a reactor, a secondary sedimentation tank and a sludge reflux pump, wherein overcurrent holes are arranged in the water flow direction of the reactor in an up-and-down alternative form and connected with various grid chambers, an anoxic zone grid chamber is arranged at the front end of the reactor, and an aerobic zone grid chamber is arranged at the back end of the reactor; the anoxic zone grid chamber is provided with a stirrer and an agitator blade; the aerobic zone grid chamber is provided with the stirrer, the agitator blade, an aeration riser pipe and an intermediate perforated clapboard; and the aeration riser pipe is internally provided with an aeration head, and sponge filling material is filled below the intermediate perforated clapboard, wherein filling ratio is 30-50%. In the method, shortcut nitrification is achieved above the aerobic zone through low dissolved oxygen (DO is 0.5 <-1>mg/L) and free ammonia (FA) inhibition so that ammonia nitrogen is converted to nitrite nitrogen; and anoxicammoxidation biomembrane acts on the lower part of the aerobic zone, the nitrite nitrogen and ammonia nitrogen are converted to nitrogen, thereby achieving denitrification of autotroph. The method has the advantages of low oxygen consumption, less sludge output and no extra carbon source.
Owner:彭永臻

Strip-type filling method of high water-swelling material for controlling movement and deformation of overlying strata

InactiveCN102011611AImprove securityControl Move MorphMaterial fill-upEngineeringCoal pillar
The invention belongs to the fields of coal mining and filling, and particularly relates to a strip-type filling method of a high water-swelling material for controlling movement and deformation of overlying strata. The filling method is applicable to a coal mining face of a coal bed with the thickness of less than 3m. The method comprises the following steps: determining the limit span L and the safety span M of key strata according to a key strata theory for strata control, then determining the width N of a filling strip through calculation according to the support strength of a filling material, and filling the filling strip with the high water-swelling material. In the invention, by controlling the key strata, the most economical filling ratio can be determined and the maximum benefit can be realized; when no-coal pillar extraction is realized, movement and deformation of the overlying strata are fully controlled within the allowable range, thus realizing gentle and uniform surface subsidence in small quantity; by means of the high water-swelling material, high-recovery mining of coal resources under any condition is realized, and the safety degree of the coal mining face is greatly improved; and normal excavation engineering layout is not affected during the filling process, thus reducing influence on production and achieving high production efficiency.
Owner:ZIBO WANGZHUANG COAL MINE

Fluidized bed film bioreactor for sewage treatment

The invention discloses a fluidized bed film bioreactor for sewage treatment, which belongs to the technical field of water and waste water treatment. The invention utilizes a process combining a biological fluidized bed with a film bioreactor, i.e. the reactor is filled with self-produced carrier granules with a diameter of about 5mm, wherein the carrier granules are made of waste rubber powder, activate carbon and adhesive, and the filling ratio is 10-30% of the effective volume of the reactor. By means of the synergistic effect of the carriers and sludge to finish the film forming process, microorganism is grown on the filler to reduce the concentration of the sludge in the reactor, change the environment running condition of the reactor and slow down the film pollution, thus further prolonging the service life of the film and improving the treatment capacity of the film. By filling the self-produced carrier granules in the film bioreactor and using the filler to change and regulate the interior microenvironment of the fluidized bed film bioreactor, such as dissolved oxygen (DO), the quantity of the filler and the water retention time, a local anoxic zone is formed, thus further realizing the synchronous nitration and denitrification function and improving the removal efficiency of total nitrogen as well as the denitrification efficiency. The fluidized bed film bioreactor for sewage treatment has a simple structure, does not feed the addition of chemical agent, is convenient and efficient to run and operate, can obtain high-quality outlet water, saves energy, can remove various pollutants such as organic matters, total nitrogen and the like, is suitable for treatment of organic waste water such as industrial and domestic waste water and the like, and can be hopefully applied in engineering practice.
Owner:BEIJING FORESTRY UNIVERSITY

Heat-conducting plastic master batch, preparation method thereof and heat-conducting plastic

The invention provides a heat-conducting plastic master batch, a preparation method thereof and heat-conducting plastic. The heat-conducting plastic master batch comprises resin, graphene, carbon nanotubes and a micron-sized inorganic heat-conducting filler. Thus, the nanoscale graphene and carbon nanotubes and the micron-sized inorganic heat-conducting filler complement each other in geometric dimensions and dimensions, the accordingly generated synergistic effect not only can significantly improve the heat-conducting performance of the heat-conducting plastic master batch, but also ensures the uniform dispersion of the graphene, carbon nanotubes and inorganic heat-conducting filler in the resin to obtain the heat-conducting plastic master batch with high filling density and uniformity; the mixing method can increase the filling ratio of the graphene, obtain the concentrated master batch of a network structure (heat-conducting network) formed by the graphene, the carbon nanotubes andthe inorganic heat-conducting filler in the resin, and the good construction of the heat-conducting network structure can significantly improve the heat-conducting performance of the heat-conducting plastic master batch and also improve the mechanical strength and impact toughness of the heat-conducting plastic master batch.
Owner:ENN GRAPHENE TECH CO LTD

Method for preparing titanium oxide nano-wire array

The invention discloses a method for preparing a titanium dioxide nano-wire array, which belongs to the technology field of preparation of nano material. The method is realized by the following proposal: one side of an AAO template is coated with a working electrode; at the room temperature, a liquid A and a liquid B are prepared for reservation; the liquid A consists of the ethanol and the esters while the volume ratio of the ethanol and the esters is 15:4 to 15:3.5; the liquid B consists of the ethanol, an acetic acid and a deionized water while the volume ratio of the ethanol, the acetic acid and the deionized water is 15:4:1.8 to 15:4:2. The liquid A is added to the liquid B slowly while stirring and a nitric acid is added to regulate the PH value, then a sol which is stable at the room temperature is formed. The alumina template which is coated with the electrode is taken as a cathode; Electrophoretic deposition is carried out in the sol; then the titanium dioxide nano-wire array can be obtained when the template after electrophoretic deposition is annealed at a certain temperature. The method adopts the electrophoretic deposition to prepare the titanium dioxide nano-wire array in the alumina template, and the titanium dioxide nano-wire array has high filling ratio and is compact and can be widely used in the field of photocatalysis solar cell and dye-sensitized solar cell.
Owner:HUAQIAO UNIVERSITY

Continuous fiber-reinforced thermoplastic resin pellets and manufacturing method of the same

To provide continuous fiber-reinforced thermoplastic pellets having a good dispersion property of a reinforcing fiber bundle in injection molded articles and capable of achieving a satisfactory outward appearance of the injection molded articles and satisfying a mechanical strength of the injection molded articles by fully exerting the reinforcing effect, and a manufacturing method of the same.
In continuous fiber-reinforced thermoplastic resin pellets manufactured by letting a long reinforcing fiber bundle be impregnated with molten thermoplastic resin and pultruding the resin-impregnated reinforcing fiber bundle with twisting, followed by the cutting of a rod-shaped composition formed of the twisted resin-impregnated reinforcing fiber bundle into pellets, a volume filling ratio Vf, which is a proportion of a cross section area of the reinforcing fiber bundle in a cross section area of a pellet cross section in a direction perpendicular to a pellet longitudinal direction, is in a range of 70% to 20%, and a twisting pitch P given by P=L/d (where L is a traveling length of a twist in a rod-shaped composition longitudinal direction per rotation of the rod-shaped composition, and d is a diameter of a circle comparable to an area of a rod-shaped composition cross section) is in a range of 2.5 to 36 (m/rev·m).
Owner:KOBE STEEL LTD
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