30 results about "Matrix volume" patented technology

A method is disclosed for modelling fluid flows in a fractured multilayer porous medium by accounting for the real geometry of the fracture network and the local exchanges between the porous matrix and the fractures at each node of the network, thus allowing simulation of the interactions between the pressure and flow rate variations in a well running across the medium. The method essentially comprises discretizing the fractured medium by means of a mesh pattern, with fracture meshes centered on nodes at the various intersections of the fractures with each node being associated with a matrix volume, and determination of the flows between each fracture mesh and the associated matrix volume in a pseudosteady state. The method can be applied in hydrocarbon production well testing.

A method of manufacturing an impact absorbing device has following steps: a) providing a matrix volume (101); b) providing a tape-like device (107) with elongated metal elements; c) press-molding the matrix volume (101); d) attaching said tape-like device (107) to the press-molded matrix volume (101). This two-step approach allows more freedom in the design of the impact absorbing device and complex structures can be obtained.

The invention relates to an immunoturbidimetric assay apolipoprotein E detection kit, and relates to the technical field of kit. The kit is composed of three parts which are an R1 reagent, an R2 reagent, and a calibrator. The R1 reagent is composed of 40-50mmol/L of a buffer solution with a pH value of 7, 70-150mmol/L of a surfactant, 15-30mmol/L of disodium ethylenediamine tetraacetate, and 0.1-1% of a preservative. The R2 reagent is prepared by adding anti-human-apolipoprotein-E antiserum with a volume ratio of 30-50% into a certain amount of the R1 reagent. The calibrator is 80-200g/L ApoE antigen, and also comprises 0.2-15% of a preservative, 1-4% of a stabilizing agent, and 1-10% of a surfactant, wherein the percentages are human serum matrix volume amount percentages. The kit has the advantages of simple operation, high sensitivity, good specificity, fast determination, and accurate and reliable result.

The invention provides a method for obtaining a rock matrix bulk modulus. The method comprises: (A), an equivalent rock matrix bulk modulus of a target logging depth point is determined according to logging information of the target logging depth point and a preset number of logging depth points adjacent to each other in an up-down mode; (B), a changing interval and a changing increment of a dry rock poisson ratio of the target logging depth point are determined; (C), a changing interval and a changing increment of the ock matrix bulk modulus of the target logging depth point are determined; (D), inversion is carried out by using an adaptive matrix mineral modulus inversion method on the condition of double convergence so as to obtain an optimum adaptive rock matrix bulk modulus of the target logging depth point; and (E), average processing is carried out on the equivalent rock matrix bulk modulus and the optimum adaptive rock matrix bulk modulus of the target logging depth point to obtain a rock matrix bulk modulus of the target logging depth point. With the method, a rock matrix bulk modulus with high precision and stability can be obtained; and a favorable foundation is laid for follow-up oil and gas reservoir prediction.

The invention discloses a method for recognizing a slight crack of a reservoir, comprising steps of establishing a relation formula of a dry rock skeleton elastic modulus ratio changing along the change of the porosity and a double-pore DEM analytical model according to a rock matrix volume modulus, a shear modulus and double-pore structure parameters, configuring pore volume percentage of a plurality of groups of soft-hard pores, obtaining volume modulus and shearing modulus of the plurality of dry rock skeletons according to the analytical model, applying a Gassmann equation to obtain volume modulus and pore volume of a plurality of saturated rocks according to the volume modulus and the shearing modulus of the plurality of dry rock skeletons, calculating the error between the volume modulus and the shearing modulus of the saturated rock which are obtained through every application Gassmann equation and the volume modulus and the shearing modulus of the saturated rock which are obtained through practical well data, obtaining an optimal soft pore volume percentage when the error is minimal, and recognizing the slight crack of the reservoir according to the optimal soft pore volume percentage. The method can improve the accuracy of recognizing the slight crack of the reservoir.

The invention discloses an emulsion matrix and finished product emulsion explosive density online detection system and a method, wherein the system and the method are used for an industrial emulsion explosive production line. The system comprises a frame, an industrial robot, a matrix conveyor, a scraper mechanism, a robot clamper, a weighing device, a sampling container and a calculation device, wherein the sampling container performs online sampling by using grippers on the robot clamper, and is a constant volume measurement cup so as to obtain a matrix volume, a matrix weight is obtained through the weighing device so as to calculate a matrix density, and a cleaning device can perform cleaning on the robot clamper and the scraper mechanism. With the density online detection system, the problem that the emulsion matrix and finished product explosive density in the industrial explosive production line is subjected to manual sampling offline detection is solved, automatic sampling through the industrial robot and online detection can be achieved, measurement is rapid and accurate, online staffs are reduced, and hidden danger is reduced.

The invention discloses an oxygen supply-controllable vertical-underflow artificial wetland denitriding device. The device consists of a water charging pump, a water charging pipe, a water distribution pipe, a surface matrix, a base matrix, a ventilating pipe, a water collecting pipe, a water discharging pipe, a wetland plant, oxygen supply equipment, a time control switch and a seepage-proofing membrane. The device can be used for enhancing oxygen supply inside the wetland by aeration of the oxygen supply equipment, so that the depth of the wetland is increased and the floor area of the wetland is reduced. Meanwhile, by controlling the submerging water depth at the lower part of the wetland, internal anoxia and aerobic environments are formed inside the whole device; the aeration time is controlled by the time control switch; carbon sources of a denitrification section are increased by means of intermittent aeration so as to purify sewage and realize high-efficiency denitrification; the discharged water reaches the first-grade B emission standards in GB18918-2002. Besides, by aeration of the perforated ventilating pipe, the wetland is more uniform in water discharging and water distribution, so that the effective utilization rate of matrix volume in the wetland is increased, and thus the removal efficiency of pollutants is improved.

An electrophotographic apparatus including an electrophotographic photosensitive member, a charging unit, and a developing unit, wherein the charging unit includes a conductive member disposed to be contactable with the electrophotographic photosensitive member, a conductive layer of the conductive member has a matrix-domain structure, at least some of the domains are exposed at the outer surface of the conductive member, the volume resistivity RI of the matrix is greater than 1.00×10¹² Ω·cm and not greater than 1.00×10¹⁷ Ω·cm, the matrix volume resistivity R1 is at least 1.0×10⁵-times the domain volume resistivity R2, and the developing unit includes a toner, the toner includes a binder resin-containing toner particle and an external additive, and the external additive contains fine particles of a hydrotalcite compound.

The invention provides a method for predicting the overpressure of a carbonate rock stratum. The method includes the steps that basic physical parameters are obtained by selecting a comprehensive interpretation model of oil, gas and water well logging according to the carbonate stratum; then a Voigt-Reuss-Hill average modulus model is used for calculating the rock matrix volume modulus, a Wood model or a Patchy model is used for calculating the pore fluid volume modulus, and a BISQ model is used for calculating the rock skeleton volume modulus; and finally, the overpressure is predicted by a porous elastic mechanics quantitative model. The new method for predicting the overpressure of the carbonate rock stratum has the beneficial effects that to a certain extent, the difficulty of overpressure prediction caused by dense and extremely heterogeneous lithology of carbonate rock is solved, and the industrial application value is achieved.

The invention provides a method for improving the survival rate of young seedlings of sugarcane seedlings. The method comprises the steps that seeds are sowed in nursery boxes in a greenhouse, when the young seedlings of the sugarcane seedlings germinate and grow to 8 mm-12 mm in height, film and gauze are lifted up every morning, if the water content of the matrix volume is lower than 27%, watering is conducted, and the water content of the matrix volume is controlled to range from 25% to 30%; a shading net on the greenhouse is opened, the air humidity in the nursery boxes is controlled to be not more than 80% by utilizing sunlight illumination; the matrix humidity is observed every afternoon, and when the water content of the matrix volume is lower than 27%, the gauze and the shading net on the upper layer of the greenhouse are put on the nursery boxes and the greenhouse respectively; the temperature of the matrix is kept to range from 22 DEG C to 36 DEG C at night till rhizome bases of the young seedlings grow to be green from a transparent color. According to the method for improving the survival rate of the young seedlings of the sugarcane seedlings, when the young seedlings of the sugarcane seedlings grow to the phase prone to infringing of germs, by means of covering and opening of the gauze, the film and the shading net, water spray and illumination are combined, the temperature of the nursery boxes and the seedling matrix are strictly controlled, the occurrences of seedling burnt, dry seedling and diseases are prevented, and the survival rate of the young seedlings is improved.

The invention relates to a method for measuring and calculating a fractured core interporosity flow coefficient based on CT scanning. The method comprises the following steps of obtaining a porosity of a fractured core small column sample, scanning the small column sample to obtain a three-dimensional grayscale image data body of the core for comparison, and adjusting to be consistent with the measured porosity; performing label analysis on the corrected digital core, and separating cracks and matrix pores; for the separated digital core, selecting a volume V1 containing cracks parallel to thedirection of the cracks, solving a crack permeability kf parallel to the direction of the cracks, selecting a matrix volume V2 that does not contain the cracks alongside the volume V1, and taking thepermeability km of the matrix rock perpendicular to the direction of the cracks. The interporosity flow coefficient of the core is calculated using the definition of the interporosity flow coefficient. The method, by directly calculating the interporosity flow coefficient according to the definition of the interporosity flow coefficient, is more intuitive than the method of well test fitting, avoids the multi-solution problem of well test interpretation, and can perform repeated calculations and simulations.

The invention provides an I/O port mapping method based on simplifying a relay matrix. The method comprises the following steps of: I/O ports with the same function adopt the same relay switch; when a user maps a machine to be controlled, firstly, a computer builds a line information table; the user connects a test point which is not connected with the machine to be controlled on the machine to be controlled to a column Z with the minimal number which is not connected with the test point on the matrix, and inputs the type F of the I/O port required by the test point to the computer; the computer searches the built line information table after receiving the input from the user to find all lines, the types of the I/O ports of which are F; and the computer scans the selected lines from small to large according to the number, if the current line Y is not used and a relay is arranged between the current line Y and the Z column, the relay of Y lien and Z column in the matrix is switched on, and the Y line is marked to be used, otherwise, the computer continuously scans the next line till that the all test points are connected with each other. The method effectively improves the use ratio of the relay, is suitable for large-scale occasions, and reduces the matrix volume of the replay.

The invention relates to an organic ecological matrix for soilless culture and a preparation method thereof and belongs to the technical field of soilless culture. The organic ecological matrix for soilless culture, provided by the invention, comprises the following materials: 35-50% of rotten abandoned padding of a fermentation bed, 10-15% of rotten straws, 15-35% of rotten vinegar residues and 15-20% of medical stone, wherein the water content is 25-45%, the organic content in dry ingredients is more than or equal to 30%, the total nutrient content (N+P2O5+K2O) is 2.5-5%, the total porosity is 65-80%, the matrix volume weight is 0.48-0.63g.cm<3>, EC is 1.26-2mS.cm<1> and pH is 5.85-7.5. The organic ecological matrix is suitable for being used as the matrix for soilless culture of solanaceous vegetables. After the organic ecological matrix provided by the invention is applied to the solanaceous vegetables, the plant height, stem diameter, leaf area index, blade chlorophyll content, root activity, yield and fruit quality are obviously increased. For example, after the organic ecological matrix is applied to tomatoes, the plant height, stem diameter, blade chlorophyll content, root activity, yield and fruit quality of the tomatoes are all obviously increased, especially, the Vc content and sugar-acid ratio of the tomatoes are obviously increased.

The invention provides a method for predicting pore pressure of a carbonate rock stratum. The method comprises the following steps of firstly, carrying out a rock physical simulation experiment on a rock sample; then utilizing a Voigt-Reuss-Hill average modulus model for calculating the volume modulus of a rock matrix; calculating the volume modulus of a pore fluid by utilizing a Wood model and aPatch model; and calculating the volume modulus of a rock framework according to a rock physical simulation experiment fitting relational expression, and further calculating the pore pressure of the carbonate rock stratum. The beneficial effects of the invention are that: the technical scheme provided by the invention is based on a fluid-containing rock porous elastic mechanical theory and a generalized fenugreek law; starting from analysis of the carbonate rock stratum stress-strain pore pressure constitutive relation, a porous elastic mechanical pore pressure prediction theoretical model forrepresenting the quantitative relation between the pore pressure and the rock elastic parameter is established, so that the problem that the pore pressure is difficult to predict due to the fact thatthe carbonate rock is compact in lithology and extremely uneven is solved, and the method has industrial application value.

The invention discloses a method and a device for determining a mass bulk modulus of porous materials such as concrete. The method includes manufacturing a cubic porous material test piece, pasting strain gauges on six sides of the cubic porous material test piece, connecting the strain gauges to a data acquisition unit through data transmission lines, putting the test piece in a constant-pressure tank full of water, extracting water from a water tank through a water pressure controller to add water pressure on the constant-pressure tank until the water pressure is stabilized as T, recording strain values of the cubic porous material test piece in three directions regularly according to strain data acquired by the strain gauges until the strain values are kept unchanged, adding the strain values in three directions to obtain a strain value sum and a final strain value sum when the strain values are kept unchanged, and computing the mass bulk modulus of the porous material test piece according to the final strain value sum and the water pressure T. The method is capable of determining a numerical value of the mass bulk modulus of the porous materials, is accurate and real in measurement results, and can provide scientific data bases for effective stress studies of hydraulic structure engineering.

The disclosure relates to the field of vacuum cleaning and in particular the collection of air-entrained debris, in a filter bag. The filter bag is for use in vacuum cleaning apparatus, and comprises fine planar filtration means in the form of a collection bag and coarse planar filtration means both being adapted to be placed in a suction-induced air stream with the coarse filtration means disposed upstream of the fine filtration means, wherein the fine filtration means serves to provide a fine filter for retaining dust particles and wherein the coarse filtration means comprises a relatively coarse filter material having a thickness of at least 4 mm which provides a matrix volume in which dust may be collected. The volume occupied by the coarse filtration means comprises at least 2%, preferably at least 5%, most preferably at least 10% of the maximum internal volume defined by the collection bag.