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System and method for repairing polycyclic aromatic hydrocarbon contaminated soil
ActiveCN106363017AShorten the timeReduce competition effectContaminated soil reclamationPolycyclic aromatic hydrocarbonFlue gas
The invention provides a system for repairing polycyclic aromatic hydrocarbon contaminated soil. The system is provided with soil pretreatment equipment, chemical oxidation equipment, thermal desorption equipment, soil accumulation equipment and flue gas dust removal equipment in sequence. Conveying belts are arranged between the soil pretreatment equipment, the chemical oxidation equipment, the thermal desorption equipment and the soil accumulation equipment. The thermal desorption equipment communicates with the flue gas dust removal equipment through a pipeline. The soil accumulation equipment communicates with the soil pretreatment equipment through a pipeline. The invention further provides a method for repairing the polycyclic aromatic hydrocarbon contaminated soil. According to the system and method for repairing the polycyclic aromatic hydrocarbon contaminated soil, chemical oxidation and low-temperature thermal desorption are combined, and therefore the removal rate of polycyclic aromatic hydrocarbon of the soil can reach 99%, the repairing effect of the contaminated soil can be effectively improved, and the repairing period can be effectively shortened.
Owner:TONGJI UNIV +1
Automatic calibrating and compensating method of onboard mounting deflection angle of strapdown inertial navigation system
ActiveCN102435206AAccurate compensation of installation deflection angleEliminates the need for precise mechanical alignmentNavigation by speed/acceleration measurementsSimulationMarine navigation
The invention belongs to an inertial navigation technology, particularly relates to an automatic calibrating and compensating method of an onboard mounting deflection angle of a strapdown inertial navigation system. By using the automatic calibrating and compensating method of the onboard mounting deflection angle of the strapdown inertial navigation system, designed by the invention, only one normal compass alignment and navigation is needed after a bracket of the strapdown inertial navigation system is firstly installed on an aircraft, the posture and the heading output by the strapdown inertial navigation system are compared with the reference posture and heading, and the coordinate system of the bracket of the strapdown inertial navigation system and the mounting deflection angle of an aircraft system are automatically calibrated and are stored in a storage unit of the strapdown inertial navigation system. The mounting deflection angle is precisely compensated in the normal working process of the strapdown system through designing a mounting deflection angle compensating algorithm in strapdown inertial navigation system software, and the requirement of the aircraft for the output display and control of the posture, the heading and other navigation parameters of the strapdown inertial navigation system is met.
Owner:FLIGHT AUTOMATIC CONTROL RES INST
Novel serial communication interface with functions of self-detection and conflict detection
ActiveCN102355507AEasy to use in engineeringImprove utilization efficiencyData switching networksEmbedded systemRapid detection
The invention relates to a novel serial communication interface with functions of self-detection and conflict detection. A sent signal of the serial interface is circulated inside the interface; a function of a detection port or a conflict on a bus can be detected by comparing received data and sent data in real time, so self-detection and quick bus conflict detection of the port can be realized; and therefore, the reliability and the bus efficiency of the serial interface are improved. By adoption of modes of simultaneously sending and parallel receiving signals by a 232 port and a 485 port, the novel serial communication interface can automatically adapt to the two modes; and engineering configuration is facilitated.
Owner:南京国电南自轨道交通工程有限公司
Method for conducting dry-wet cycle and direct shear test on simulated load-bearing soil
InactiveCN105865938APrecisely control the change of moisture content in the testThe material is simple and cheapMaterial strength using steady shearing forcesSoil scienceStructural engineering
The present invention discloses a method for conducting the dry-wet cycle and the direct shear test on the simulated load-bearing soil. A device composed of a dry-wet cycle device and a shear box is arranged. The dry-wet cycle device comprises a nut, a fixed ring, upright rods, a lower bottom plate, a lower bottom plate drain hole, a cutting ring, a cutting ring buckle, a cross rib, an upper cover plate, an upper cover plate drain hole, an upper shear box, a lower shear box and a shear box base. The upright rods are provided with threads along the whole length thereof and are fixedly connected with the lower bottom plate. The upper end of the cross rib on the upper cover plate is larger than the outer diameter of the fixed ring by 1 cm. The diameter of the upper cover plate is slightly smaller than the inner diameter of the cutting ring. The straight-line distance between diagonally arranged upright rods is slightly greater than the diameter of the experiment cutting ring. The shear box is composed of the base, the lower shear box and the upper shear box. The cycle device can be installed directly into the shear box. Through adjusting a direct shear apparatus and a dial indicator, the direct shear test can be conducted. Based on the method, the unloading condition is avoided during the entire process, from the sample preparation, the dry-wet cycle to the shear failure. Meanwhile, the water content change of the test can be accurately controlled.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Alternative current and direct current coordination control method based on direct current power emergency control
ActiveCN102624035AEasy to use in engineeringIncrease flexibilityDc network circuit arrangementsAc-dc network circuit arrangementsElectricityTransmission system
The invention belongs to the field of alternative current and direct current electricity transmission system operation control, in particular to an alternative current and direct current coordination control method based on direct current power emergency control, which comprises alternative current and direct current coordination control based on a priority allocation principle, alternative current and direct current coordination control based on an even allocation principle or alternative current and direct current coordination control based on an equal power loading rate principle. The alternative current and direct current coordination control method based on direct current power emergency control is applied to an direct current and alternative current system or a multi-direct-current system with a complex net frame structure and has the advantages of being strong in achieving method operability and wide in application range.
Owner:CHINA ELECTRIC POWER RES INST +1
A method and system for vector control field orientation correction of asynchronous motor
InactiveCN109167548ASolve the problem of inaccurate magnetic field orientationReal-time accurate magnetic field positioningElectronic commutation motor controlAC motor controlVoltage amplitudeControl vector
A method and system for vector control field orientation correction of asynchronous motor. The method comprises the following steps: obtaining three-phase stator currents ia, ib and ic of an asynchronous motor and an angular velocity omega r of the motor; D-axis current isd and q-axis current isq are obtained by 3s / 2r transformation of current ia, ib and ic, and output voltage amplitude Us is calculated by voltage equation of asynchronous motor; Calculate slip angular velocity increment coefficient Kslip and slip angular velocity omega slip of asynchronous motor; Calculate d-axis control voltage of asynchronous motor shown in the description q-axis control voltage shown in the description and dq axis combined voltage shown in the descrition and according to shown in the description and shown in the description. The SVPWM space vector pulse width modulation (SVPWM-SVPWM) is processed to control the operation of the motor. The invention relates to vector control magnetic field orientation correction of asynchronous motor based on voltage observation, By calculating d, q-axis control voltage shown in the description, Thus, the operation of the motor is controlled, the problem of inaccurate orientation of the magnetic field caused by the difficulty of real-time and accurate acquisition of the rotor parameters of the motor is solved, and at the same time, the d-axis and q-axis voltage observation is taken into account, so that the accurate magnetic field positioning can be realized in the full speed range.
Owner:HUNAN VICRUNS ELECTRIC TECH
Method for representing time-space scale association of solute transport in porous medium
ActiveCN108614942ABroad engineering application prospectsEasy to use in engineeringDesign optimisation/simulationSpecial data processing applicationsBreakthrough curveConvection dispersion
The invention discloses a method for representing time-space scale association of solute transport in a porous medium. The method comprises the steps of selecting a solute transport process in the specific porous medium as a research object, determining a test condition, and obtaining test data of a solute breakthrough curve; building a time-space fractal derivative convection dispersion model, and deriving an analytic solution of the time-space fractal derivative convection dispersion model; in combination with the test data of the solute breakthrough curve, calculating parameters of the time-space fractal derivative convection dispersion model, quantizing the solute breakthrough curve by adopting the analytic solution of the model, and analyzing early arrival and trailing features of thebreakthrough curve; and according to values of the model parameters, analyzing an association degree between the model parameters and a time or space scale, and giving a quantitative relationship between the model parameters and the time or space scale. The smaller the orders of a time fractal derivative and a space fractal derivative are, the higher the time-space association degree is, and themore remarkable the early arrival and trailing features of the breakthrough curve is. The method can be used for groundwater and soil pollution prediction, assessment, remediation and the like, and isconvenient for use in engineering.
Owner:HOHAI UNIV
Device for testing thermophysical parameters of soil mass sample
InactiveCN106353359APrecise control over the initial stateHigh precisionMaterial heat developmentPreparing sample for investigationThermal probeSoil mass
The invention discloses a device for testing thermophysical parameters of a soil mass sample. The device comprises a sample preparation system and a testing system, wherein the sample preparation system is used for completing preparation of the soil mass sample, and the testing system is used for completing the testing on the thermophysical parameters of the soil mass sample under different thermal loads; the sample preparation system comprises a mini-type compacting device, a metal bar, a sample preparation tube and an external extension tube, and the mini-type compacting device is formed by a base and a compacting hammer; the testing system is formed by high / low temperature alternating humidity-temperature test chamber, a thermal probe and a KD2 Pro thermal characteristic analyzer, and a stainless steel support is arranged at the inner part of the high / low temperature alternating humidity-temperature test chamber and is used for placement of the sample preparation tube filled with the soil mass sample. Actual simulation under different thermal load environments is realized through the device, and the thermophysical parameters of the soil mass sample are accurately tested. According to the device disclosed by the invention, the structure is simple, the operation is convenient, the precision of a testing result is higher, convenience can be provided for research and application of a geotechnical engineering thermoanalysis field, and engineering application and large-scale promotion are facilitated.
Multi-train speed curve collaborative optimization method considering network loss
ActiveCN111114596AOptimize and update speed curveReduce energy consumptionRailway traffic control systemsRegenerative brakeSimulation
The invention discloses a multi-train speed curve collaborative optimization method considering network loss. The method comprises the following steps: acquiring basic data of trains, lines, timetables, traction networks and the like; calculating an energy-saving speed curve of a preceding train running in each section, introducing a posterior train, dividing the running process of the multi-trainsystem into sub-sections, establishing a traction network equivalent circuit model based on multiple trains, establishing and solving a traction substation total energy consumption optimization model, and outputting a multi-train energy-saving optimization speed curve. According to the invention, the running speed curve of a single train in each section is optimized such that train traction energy consumption is reduced, the utilization rate of regenerative braking energy is increased by cooperatively optimizing speed curves of multiple trains, single-train optimization and multi-train optimization are combined, meanwhile, train traction energy consumption is reduced, the utilization rate of regenerative braking energy is increased, and finally the total energy consumption of a traction substation is reduced.
Owner:SOUTHWEST JIAOTONG UNIV
Water-proof LED flexible light stripe and its manufacturing method
InactiveCN101220947AHigh quality and reliabilitySafe to usePoint-like light sourceElectric circuit arrangementsColloidEngineering
The invention provides a waterproof LED flexible optical strip, including an LED flexible optical strip which is coated with a colloid layer which is spliced with a tegmen; meanwhile, the invention also provides a preparation method of the waterproof LED flexible optical strip. The invention has the advantages that the products of the waterproof LED flexible optical strip have high quality reliability and good application safety, the method has low manufacturing cost, and mass yield can be realized; furthermore, the invention can produce arbitrary length according to requirement, which has extremely high product yield and superiority which is incomparable with other waterproof LED flexible optical strips.
Owner:上海宜美电子科技有限公司
Red mud curing agent and use thereof
ActiveCN104386990AHigh strengthImprove engineering ease of useSolid waste managementFiberCrack resistance
The invention discloses a red mud curing agent and a use thereof and belongs to the technical field of red mud comprehensive utilization. The red mud curing agent comprises 20-90 parts of slag powder, 1-50 parts of fly ash, 1-30 parts of silt, 5-15 parts of a catalysis exciting agent containing sodium, potassium, calcium and magnesium and 0.1-10 parts of whisker fibers. Fly ash and silt can well adjust a silicon-aluminum ratio of red mud and liquid-plastic limit index and improve engineering body strength performance indexes and engineering usability. Whisker fibers improve a flexural capability and crack resistance of the finished product. The red mud curing agent is powdery solid, is convenient for engineering use, and can be used by addition and stirring based on a ratio according to different engineering performance requirements. Through reasonable blending, the red mud curing agent can improve strength of a cured body containing red mud as a main component, completely satisfy building non-burnt brick, road base and surface layer engineering index requirements and realize large consumption of red mud.
Owner:BEIJING UNIV OF CIVIL ENG & ARCHITECTURE +1
Laguerre output method for rigid body space motion state
ActiveCN102445202ASimplified Computational ComplexityEasy to use in engineeringInstruments for comonautical navigationComputation complexityAngular velocity
The present invention discloses a Laguerre output method for a rigid body space motion state. According to the method, three velocity components of a machine shaft system and a three-ary number form linear differential equations by defining the three-ary number; a Laguerre orthogonal polynomial is adopted to proximately and closely depict a rolling angle p, a pitching angle q, and a yawing angular velocity r; a state transition matrix of the system can be solved according to a manner of an arbitrary order keeper so as to acquire an expression of a rigid body motion discrete state equation, such that the singularity problem of the attitude equation is avoided so as to acquire the main motion state of the rigid body. According to the present invention, the three-ary number is introduced, such that the state transition matrix is the block upper triangular manner, and can be solved by reducing the order so as to substantially simplify the calculation complexity, and be easily used by the engineering.
Owner:XIAN FEISIDA AUTOMATION ENG
Preparation method of modified granite aggregate, and adhesion testing method
InactiveCN108863132AImprove adhesion levelEasy to use in engineeringFlow propertiesWater bathsRoad surface
The invention discloses a preparation method of modified granite aggregate, and an adhesion testing method. The preparation method comprises the following process steps: heating styrene-butadiene-styrene triblock copolymer (SBS) modified asphalt, then adding a liquid anti-stripping agent into the heated SBS modified asphalt, stirring evenly, and placing the obtained mixture in an environment of 175-180 DEG C to prepare a mixed solution a; weighing granite aggregate and cement, and heating up to 175-181 DEG C; then, uniformly stirring the heated granite aggregate and cement, and carrying out heat preservation at 175-180 DEG C to obtain a mixture b; blending the mixed solution a in a mixing container, adding the mixture b during blending, and uniformly stirring to obtain the modified graniteaggregate. The modified granite aggregate is placed in a constant temperature water bath at 76-84 DEG C, part of the aggregate is taken out and put into cold water at set intervals, and the aggregateis completely taken away in 4-6 times; finally, the adhesion grade is evaluated according to the percentage of a stripping area. The modified granite aggregate prepared by the method is strong in adhesion durability and good in water stability, and achieves the level-5 adhesion requirement of the asphalt pavement. The invention also discloses an adhesion evaluation method which is convenient to apply and has a good correlation with engineering.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
Prediction method for early transverse cracks of continuous reinforced concrete pavement
InactiveCN110160870AEasy to use in engineeringFacilitate field test researchMaterial strength using tensile/compressive forcesComplex mathematical operationsTensile strainReinforced concrete
The present invention relates to the technical field of road engineering detection, and discloses a prediction method for early transverse cracks of continuous reinforced concrete pavement. The methodcomprises following steps: (1) determining a plurality of measuring points before paving road slab of the continuous reinforced concrete pavement to be predicted, setting a row of strain gauge alongslab depth direction of the road slab at each measuring point, and connecting the strain gauge to an automatic data acquisition device; (2) after the continuous reinforced concrete pavement at a position of the strain gauge to be set is paved, continuously detecting longitudinal strain and temperature by the plurality of the strain gauges respectively at different positions of the road slab; (3) and processing data received by the automatic data acquisition device, sequentially and respectively calculating and obtaining equivalent age and ultimate tensile strain at different positions of the road slab based on the obtained temperature data, thereby respectively comparing the obtained ultimate tensile strain with the corresponding longitudinal strain, and performing prediction. The method is easy to implement, has good flexibility and has high accuracy.
Continuous flow low-carbon denitrification process for low-carbon-nitrogen-ratio domestic sewage
ActiveCN114853172AEasy to handleEasy to use in engineeringWater treatment parameter controlBiological treatment regulationSewageAmmonia
The invention discloses a continuous flow low-carbon denitrification process for low-carbon-nitrogen-ratio domestic sewage, which is characterized in that an existing AAO (anaerobic-anoxic-oxic) water tank is utilized, submersible stirring equipment is additionally arranged in an O tank, and efficient treatment of the low-carbon-nitrogen-ratio domestic sewage is realized by controlling the time sequence of aeration of the O tank, opening and closing of a submersible stirrer and backflow of nitrification liquid. When the carbon-nitrogen ratio is larger than 2, the domestic sewage with the low carbon-nitrogen ratio is efficiently treated on the premise that a carbon source is not additionally arranged, limitation of harsh process control conditions such as short-cut nitrification and denitrification and anaerobic ammonia oxidation is avoided, and the efficient continuous flow low-carbon biological denitrification process is easy to use in an engineering mode and especially suitable for upgrading and reconstruction of an existing sewage plant.
Owner:山东纯江环境科技有限公司
Experimental testing method for soaking time of shale reservoir horizontal well
ActiveCN112112641AQuick Qualitative or Quantitative QualitativeFast qualitative or quantitative or quantitative determinationSurveyDesign optimisation/simulationExperimental testingClay minerals
The invention discloses an experimental testing method for the soaking time of a shale reservoir horizontal well. The experimental testing method comprises the steps that a rock sample is prepared according to rock of a shale reservoir section and dried to constant weight; the clay mineral content of the rock sample is obtained; a hydrophilicity index of the rock sample is obtained; a clay mineralcontent and hydrophilicity index curve is fitted, and a clay mineral content critical value is determined; the soaking time is qualitatively judged according to the critical value of the clay mineralcontent; the soaking time is quantitatively tested, nuclear magnetic resonance scanning is conducted on a rock core, a correlation curve of T2 spectrum curve peak area and imbibition test time is drawn, and an inflection point corresponding to the correlation curve is taken as the soaking time. According to the experimental testing method, a method for rapidly determining the soaking time is provided, mine field engineers can qualitatively and quantitatively determine the soaking time through the method, and the development efficiency is greatly improved.
Owner:SOUTHWEST PETROLEUM UNIV
Hartley output method of rigid body space motion states
InactiveCN102384747ASimplified Computational ComplexityEasy to use in engineeringInstruments for comonautical navigationSpecial data processing applicationsComputation complexityEquation of state
The invention discloses a Hartley output method of rigid body space motion states, which enables three velocity components and a ternary figure of a body axis to form linear simultaneous differential equations by defining the ternary figure, and adopts a Hartley function to conduct approximate approaching description of roll rate P, pitching rate Q and yaw rate R. Users can solve a state-transition matrix of a system in accordance with arbitrary order keeper modes, and then obtain expression of rigid motion discrete state equations, thereby avoiding gesture equation strange problems and obtaining main motion states of a rigid body. The Hartley output method enables the state-transition matrix to be a blocking upper triangular form by introducing the ternary figure, can reduce order to solve the state-transition matrix, greatly simplifies computational complexity and is convenient to use in construction.
Owner:XIAN FEISIDA AUTOMATION ENG
Method for quantifying solute transport multi-scale characteristics in complex medium
ActiveCN108460182AEasy to use in engineeringCharacter and pattern recognitionDesign optimisation/simulationResearch ObjectMean square
The invention discloses a method for quantifying solute transport multi-scale characteristics in a complex medium. The method comprises the steps of selecting a solute transport process in a concretecomplex medium as a research object, determining a test condition, observing a movement trajectory of a solute particle to obtain test data R of a mean square displacement of the solute particle, wherein R is a set of average values of distances between positions x of all particle at the t moment and respective initial point when the movement time is t; deducing a multi-scale transport rate of thesolute transport according to a distributed step fractal derivation model or an equivalent form thereof; calculating a value of a parameter c in the multi-scale transport rate in combination with thetest data R of the mean square displacement of the solute particle; and obtaining multi-scale characteristics of the solute transport in the complex medium according to the value of the parameter c,and classifying the solute transport process. The method for quantifying the solute transport multi-scale characteristics in the complex medium has broad engineering application prospects, can be usedfor prediction, assessment and management of pollutant transport. Compared with an existing model or technology, the method is more convenient for engineering use.
Owner:HOHAI UNIV
Polynomial type output method for spatial motion state of rigid body
ActiveCN102323992ASimplified Computational ComplexityEasy to use in engineeringSpecial data processing applicationsComputation complexityReduced order
The invention discloses a polynomial type output method for a spatial motion state of a rigid body. In the method, by defining a ternary number, three speed components of a machine body axis system and the ternary number constitute a linear simultaneous differential equation, polynomials are used for performing approximate description on roll rate p, pitch rate q and yaw rate r, a state-transition matrix of a system can be solved according to a random-order keeper manner so as to further obtain an expression of a motion discrete state equation of the rigid body, and thus, the problem of a singular gesture equation is avoided and the main motion state of the rigid body is obtained. In the invention, by introducing the ternary number to make the state-transition matrix be of a blocked upper triangular form, the state-transition matrix can be solved in a reduced order manner, the computation complexity is greatly simplified, and engineering purposes are facilitated.
Owner:XIAN FEISIDA AUTOMATION ENG
Arbitrary-step orthogonal series output method of space motion state of rigid body
ActiveCN102508818ASimplified Computational ComplexityEasy to use in engineeringComplex mathematical operationsSystem of differential equationsAngular velocity
The invention discloses an arbitrary-step orthogonal series output method of the space motion state of a rigid body. In the method, a ternary number is defined so that the three velocity components of a body axis system and the ternary number form linear simultaneous differential equations; the rolling angular velocity p, pitching angular velocity q and yawing angular velocity r are subjected to similar approximation description by use of an arbitrary-step orthogonal polynomial; and a state transition matrix of the system can be solved according to the mode of an arbitrary-order holder so as to obtain an expression of a motion discrete state equation of the rigid body, avoid the problem of singularity of an attitude equation and obtain the major motion state of the rigid body; and in the invention, the state transition matrix becomes a block upper triangular matrix by introducing the ternary number, and the state transition matrix can be solved by reducing order, thereby greatly reducing the computational complexity and facilitating the engineering application.
Owner:XIAN FEISIDA AUTOMATION ENG
Legendre output method for space motion space of rigid body
ActiveCN102346729ASimplified Computational ComplexityEasy to use in engineeringComplex mathematical operationsSystem of differential equationsEquation of state
The invention discloses a Legendre output method for a space motion space of a rigid body. According to the method, three velocity components and triples of a machine body axis system form a linear simultaneous differential equation by defining the triples; the rolling p, the pitching q and the yaw rate r are subjected to approximation approximation description by adopting a Legendre orthogonal polynomial of a fluctuation zone; and a state transition matrix of the system is solved according to a mode of any-order holder, and thus an expression of a motion discrete-state equation of the rigid body is obtained, the singularity of an attitude equation is avoided and further main motion state of the rigid body is obtained. According to the Legendre output method disclosed by the invention, the triples are introduced, so that the state transition matrix is in a blocked upper triangular form and can be solved in an order reducing manner and the computation complexity is greatly simplified; and the Legendre output method is convenient for engineering to use.
Owner:XIAN FEISIDA AUTOMATION ENG
Method for measuring height of total station
ActiveCN105066886AThe principle is simple and clearThe materials are simple and cheapUsing optical meansEyepieceHorizontal axis
The invention discloses a method for measuring the height of a total station. The method applies a light reflection principle. After the total station is centered and leveled on a measuring basic point, a vertical tower ruler is erected a certain distance away from the measuring basic point, and one reflective body is arranged on the tower ruler. According to the invention, an image formed by the basic point in the reflective body can be observed from the ocular lens of the total station through vertical movement of the reflective body along the tower body, and the distance from the horizontal axis of the total station to the basic point, i.e., the instrument height, can be solved according to the equal relation between an optical incidence angle and a reflection angle and the included angle relation between parallel lines. The method provided by the invention is simple and clear in principle, simple and cheap in materials, simple to operate, high in precision, easy to grasp and facilitates engineering application.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Detachable and easy-maintenance fan hanger and construction method thereof
ActiveCN106044541ASolve the difficult problem of disassembly and maintenanceEasy to useLoad-engaging elementsBall bearingThrust bearing
Owner:CHANGJIANG SURVEY PLANNING DESIGN & RES
Tank truck whole vehicle mass dynamic estimation method based on plate spring deformation
InactiveCN112389450AEasy to operateEasy to use in engineeringTank truckLeast squares support vector machine
The invention provides a tank truck whole vehicle mass dynamic estimation method based on plate spring deformation. The method comprises the following steps: defining parameters for estimating the whole vehicle mass and an acquisition mode thereof, designing a typical driving scene of a tank truck, carrying out a real car test to obtain sample information, fitting a function expression of resistance of a resistance strain gauge and the whole vehicle mass by using an LS-SVM (Least Square Support Vector Machine), and finally, realizing dynamic estimation of the tank truck whole vehicle mass based on the fitted function expression. The method utilizes the resistance induction plate spring deformation to estimate the tank truck whole vehicle mass, and is convenient to operate and convenient for engineering use. Meanwhile, the influence of the mass center position of the tank car is reflected through different deformation degrees of the plate springs on the two sides, and errors caused by shaking to whole vehicle mass estimation are reduced.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT
Arbitrary order output method for rigid body space motion state
ActiveCN102359789ASimplified Computational ComplexityEasy to use in engineeringInstruments for comonautical navigationMatrix differential equationComputation complexity
The present invention discloses an arbitrary order output method for a rigid body space motion state. According to the method, three velocity components of a machine shaft system and a three-ary number form a linear differential equation by defining the three-ary number; a state transition matrix can be solved according to a manner of an arbitrary order keeper so as to acquire an expression of a rigid body motion discrete state equation, such that the singularity problem of the attitude equation is avoided so as to acquire the main motion state of the rigid body. According to the present invention, the three-ary number is introduced, such that the state transition matrix is the block upper triangular manner, and can be solved by reducing the order so as to substantially simplify the calculation complexity, and be easily used by the engineering.
Owner:XIAN FEISIDA AUTOMATION ENG
A kind of red mud curing agent and its application
The invention discloses a red mud curing agent and a use thereof and belongs to the technical field of red mud comprehensive utilization. The red mud curing agent comprises 20-90 parts of slag powder, 1-50 parts of fly ash, 1-30 parts of silt, 5-15 parts of a catalysis exciting agent containing sodium, potassium, calcium and magnesium and 0.1-10 parts of whisker fibers. Fly ash and silt can well adjust a silicon-aluminum ratio of red mud and liquid-plastic limit index and improve engineering body strength performance indexes and engineering usability. Whisker fibers improve a flexural capability and crack resistance of the finished product. The red mud curing agent is powdery solid, is convenient for engineering use, and can be used by addition and stirring based on a ratio according to different engineering performance requirements. Through reasonable blending, the red mud curing agent can improve strength of a cured body containing red mud as a main component, completely satisfy building non-burnt brick, road base and surface layer engineering index requirements and realize large consumption of red mud.
Owner:BEIJING UNIV OF CIVIL ENG & ARCHITECTURE +1
Chebyshev output method for space motion state of rigid body
ActiveCN102384746ASimplified Computational ComplexityEasy to use in engineeringInstruments for comonautical navigationSpecial data processing applicationsMatrix differential equationComputation complexity
The invention discloses a Chebyshev output method for the space motion state of a rigid body. The method comprises the steps of: defining a ternary number so that three speed components of the set of axes of the body and the ternary number form a system of linear differential equations; and performing approximation description on rolling, pitching and yawing angular speeds p, q and r by using Shifted Chebyshev orthogonal polynomials, wherein the state transfer matrix of the system can be solved in the manner of any order holder, thus obtaining the expression of the discrete state equation of the motion of the rigid body; and the problem of singularity of the attitude equation is avoided; therefore, the main motion state of the rigid body is obtained. The Chebyshev output method is characterized in that the ternary number is introduced so that the state transfer matrix is in the form of portioned upper triangles and thereby can be solved through deflation; therefore, the complexity of calculation is greatly simplified; and the Chebyshev output method is convenient for engineering use.
Owner:XIAN FEISIDA AUTOMATION ENG
Leveling instrument fast leveler
InactiveCN105222750AThe principle is simple and clearThe materials are simple and cheapHeight/levelling measurementMagnetic tension forceMetallic materials
The invention discloses a leveling instrument fast leveler. The leveler comprises a semicircular shell and a hemispheroid, the hemispheroid is inscribed to the semicircular shell inner diameter, and the semicircular shell and the hemispheroid are both made of a metal material, and the semicircular shell inner surface and the hemispheroid spherical surface are both frosted surface. A magnetic switch is disposed on the semicircular shell and can provide strong magnetic force when it is opened, the hemispheroid is equipped with an instrument connecting screw rod connected to the leveling instrument, and the semicircular shell is equipped with a foot stand connecting nut for connecting a foot stand. During use, the semicircular shell is fixed on the foot stand, the hemispheroid is connected to the leveling instrument, the hemispheroid is rotated to achieve a horizontal position, and then the magnetic switch is opened to generate strong magnetic force so as to fix the hemispheroid and the semicircular shell, so that the leveling instrument can maintain a horizontal state fixedly. The leveling instrument fast leveler provided by the invention has the characteristics of simple and clear principle, simple and cheap material, simple operation, fast leveling speed and easy grasp, and is convenient for engineering application.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
A method for measuring the reflectivity of absorbing materials based on a calibration sphere
ActiveCN103592317BEliminate approximation errorsEliminate the effects ofMaterial analysis using microwave meansCouplingMaterials testing
The invention discloses a calibrating ball based wave-absorbing material reflectivity testing method. According to the method, a main control computer, a transmitter, a receiver, a transmitting antenna and a receiving antenna are taken as a testing system, and the testing accuracy of the reflectivity of a wave-absorbing material is increased through the calibrating ball based reflectivity testing method. The calibrating ball based wave-absorbing material reflectivity testing method not only solves the problem of testing error caused by alignment errors, transceiving coupling and the like between a tested target and the transmitting and receiving antennas in the process of testing the reflectivity of the wave-absorbing material, but also increases the testing accuracy; moreover, the method provided by the invention is simple in implementation mode and flexible in installation.
Owner:CHINA ELECTRONIS TECH INSTR CO LTD
Method for disposing waste water by using enhanced polyhydroxy ferrous compound
ActiveCN103241824AHigh reducing activityGood dispersionWater/sewage treatment by reductionDispersityWastewater
The invention relates to a method for polyhydroxy ferrous compound by using an enhanced polyhydroxy ferrous compound. The method comprises the steps of: dissolving ferrite into a dilute ascorbic acid solution, disposing by utilizing a dispersing agent, an alkaline solution and copper salt to obtain the enhanced polyhydroxy ferrous compound, disposing the waste water by utilizing the compound, and sampling and analyzing. Compared with the prior art, the enhanced polyhydroxy ferrous compound is high in reducing activity, good in dispersity and large in specific surface area and can be used for reducing and converting degradation-resistant toxic pollutants in the waste water, the biodegradability of the waste water can be improved, in addition, the cost is lower, the usage amount is less, and the disposal cost is lower.
Owner:TONGJI UNIV
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