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Distributed optical fiber test platform for monitoring earth rock dam seepage condition
ActiveCN103364321AImprove engineering applicabilityThe design concept is complete and novelPermeability/surface area analysisPorous mediumGeophysics
The invention discloses a distributed optical fiber test platform for monitoring an earth rock dam seepage condition. The distributed optical fiber test platform comprises a heating system, a seepage system and a DTS system; the distributed optical fiber test platform is a practical platform having strong operability, aimed at dam seepage monitoring and based on construction of a dam seepage monitoring two-field coupling simplified model; with combination of the DTS system, the distributed optical fiber test platform provides a possibility for a practical application of seepage monitoring engineering of a porous medium structural body, such as an earth rock dam and a dyke-dam, and builds a reliable test platform for various related test researches; and the distributed optical fiber test platform has the advantages of wide test range, high precision, simple layout, low monitoring cost, high working efficiency, strong engineering applicability and the like.
Owner:HOHAI UNIV
Implementation method for electric vehicle braking force redistribution
ActiveCN106394259AImprove general performanceImprove effectivenessElectric devicesElectrodynamic brake systemsActive safetyPermanent magnet synchronous motor
The present invention belongs to the field of electric vehicle active safety, and especially relates to an implementation method for electric vehicle braking force redistribution. The method comprises the following steps: step one, simplification of a safety brake scope; second step, distribution of braking force for the first time; step three, calculation of power demand efficiency; and step four, redistribution of braking force. The present invention refers to an electric vehicle braking force redistribution strategy, the power demand efficiency is introduced into the braking force distribution strategy under the condition of considering the copper loss and iron loss of a permanent magnet synchronous motor, so that the braking force distribution strategy better accords to the actual situations, the effectiveness and practicability of braking force distribution are improved, and a support for the theoretical basis is enhanced.
Owner:CHANGCHUN UNIV OF TECH
Concrete chloride ion permeation property quick rust testing method
InactiveCN101071132AFast testStrong theoreticalWithdrawing sample devicesMaterial testing goodsDistilled waterIon permeation
This invention introduces a concrete chloride ion permeability fast - corrosion testing method is: put the concrete specimen has a network-reinforced in the middle in the NaCl and 0.3 M NaOH, distilled water preparation and 3.0% in the chemical percentage of pure quality NaCl, and 0.3 M NaOH aqueous solution mixed, in the environmental temperature was 23 or so, with NaCl solution should be soaked every one week replacement once, in the testing process after inspection and test soaking solution of NaCl concentration of 60 +- 0.1 volts the plus DC, in the test cycle, not more than 24 hours in regular record current value, and growth of over 10% / 24 hours, the application of NT BUILD 208, AAHSTO T260 accurate determination of concrete powder samples of the acid chloride Cl-content, chlorine ion concentration measurement accuracy should reach 0.001%.
Owner:SHANGHAI RES INST OF BUILDING SCI CO LTD
Calculating method of impedance value of three-winding transformer based on short circuit current restraint
The invention relates to a calculating method of an impedance value of a three-winding transformer based on short circuit current restraint. The method includes: firstly, a target function is set, and relations between an equivalent positive-sequence impedance XH [sigma]1 and an equivalent zero-sequence impedance XH [sigma]0 from a system to a short circuit point and system positive-sequence impedances Hx1 and Mx1, zero-sequence reactances, and transformer three-side equivalent reactances x1, x2, and x3 are established; relations between XH [sigma]1 and a high-voltage side three-phase short circuit current IHf3, a medium-voltage side three-phase short circuit current IMf3, and XH [sigma]1, XH [sigma]0 and a high-voltage single-phase grounding short circuit current IHf1, a medium-voltage single-phase grounding short circuit current IMf1 are established; a relation between a low-voltage side three-phase short circuit current ILf3 and x1, x2, x3, Hx1 and Mx1 is established; and limit values of short circuit current of each voltage grade side of a substation are set, the ranges of initial values of positive-sequence and zero-sequence impedances of each voltage grade are obtained, and the optimal parameter values of impedances at each side of the transformer are calculated. The beneficial effects of the method are that optimized design of the impedances of the transformers for various types of substations can be realized, and the applicability is high.
Owner:STATE GRID CORP OF CHINA +2
Determination method for pervious cement concrete closed porosity
InactiveCN106248547AAddressing closed porosity conditionsThe method is simple and feasiblePermeability/surface area analysisPorosityVoid ratio
The invention discloses a determination method for pervious cement concrete closed porosity. The bulk density of a test piece is measured by a test method and maximum theoretical relative density of a concrete sample is measured, then the voidage of the test piece can be calculated. Then a connected porosity of the test piece is acquired by a test method, and calculation is carried out to obtain the closed porosity of the test piece. The test piece used by the method provided by the invention can be an irregularly shaped test piece, and breaks the constraint that only regular standard test pieces can be used in previous tests. The method provided by the invention fills the blank of determination method for pervious cement concrete closed porosity, and lays the foundation for future development of closed porosity related subjects.
Owner:SHANDONG UNIV OF SCI & TECH
Polarimetric SAR image classification method based on eigenvector measurement spectral clustering
InactiveCN104463219AStrong theoreticalThe classification result is accurateCharacter and pattern recognitionFeature vectorMaximum eigenvalue
The invention belongs to the technical field of remote sensing image processing, and particularly discloses a polarimetric SAR image classification method based on eigenvector measurement spectral clustering. The aim that the eigenvectors obtained after a polarimetric coherence matrix eigenvalue is decomposed are studied and utilized is mainly achieved. The implementation process mainly comprises the steps that (1) Lee filtering is carried out on a polarimetric SAR image; (2) eigenvalue decomposition is carried out on a coherence matrix of each pixel to obtain the eigenvectors; (3) the eigenvector corresponding to the maximum eigenvalue is used for constructing features; (4) a similarity matrix is constructed in a measurement mode of included angle cosine distance; (5) a spectral clustering algorithm is carried out on the similarity matrix to obtain initial classification tags; (6) wishart clustering is carried out on the basis of the initial classification tags to obtain the final classification result. The method has the advantages of being low in complexity and finer and more accurate in classification result, and can be used for target detection and target recognition of the polarimetric SAR image.
Owner:XIDIAN UNIV
Multi-dimensional and multidirectional stress-strain monitoring system
The invention discloses a multi-dimensional and multidirectional stress-strain monitoring system. The multi-dimensional and multidirectional stress-strain monitoring system is characterized in that the multi-dimensional and multidirectional stress-strain monitoring system comprises an information collection device (1), an optical fiber monitoring device (2), a data analysis platform (3), a wire collection box (4) and an optical fiber sensing device (5) arranged in a structural body (6) to be monitored, the optical fiber sensing device (5) is used for sensing stress-strain information which is produced by the structural body (6) to be monitored under the action of external factors, the optical fiber monitoring device (2) is connected with the optical fiber sensing device (5) through the wire collection box (4) and conducts distributed type high-precision monitoring on the structural body (6) to be monitored, the information collection device (1) is connected with the optical fiber monitoring device (2) and used for capturing and storing optical fiber monitoring data and digitizing and visualizing monitoring information, and the data analysis platform (3) is connected with the information collection device (1) and used for providing the data preparation function, the graph viewing function, the data basic analysis function and the stress calculation function for a user. The system has extremely strong operability and strong realizability in practical use.
Owner:HOHAI UNIV
Cement solidification strength ultra-early prediction method
The invention discloses a cement solidification strength ultra-early prediction method, and belongs to the foundation treatment and sludge solidification. The method comprises the following steps: determining a series of model fitting parameters unrelated to temperature and proportion by development related preliminary experiment at an investigation stage based on a strength increasing model in consideration of the cement solidification sludge under the temperature influence, and then sampling at the cement solidification sludge at the construction stage, and performing early strength acceleration testing under a predetermined high-temperature condition, and predicting the middle and late strength value under the cement solidification sludge construction environment based on the strength testing value under the early high-temperature condition. The cement solidification strength ultra-early prediction method, and belongs to the foundation treatment and sludge solidification disclosed by the invention is simple in operation and high in accuracy, the middle and late period strength prediction can be performed at the early stage of the construction, the early quality control of the cement solidification sludge filling engineering can be realized, the optimal mixing proportion at the construction field can be adjusted as early as possible under the guidance, the problem that the strength sampling inspection is substandard after the construction is finished can be effectively avoided, the curing agent cost and the later solidification cost can be obviously reduced.
Owner:HUAZHONG UNIV OF SCI & TECH
Model experiment device for saline water doing horizontal jet movement under action of heat plume
The invention discloses a model experiment device for saline water doing horizontal jet movement under action of heat plume. The model experiment device comprises a main water tank, a jet saline water system, a plume saline water system, a flow field testing system and a pipeline, wherein the jet saline water system comprises a jet saline water tank, a jet water supply pump, a jet constant-pressure water tank, a jet paint box, a jet floater flow meter, a jet water distributing tank and a jet injecting port; the plume saline water system comprises a plume saline water tank, a plume water supply pump, a plume constant-pressure water tank, a plume paint box, a plume floater flow meter, a plume water distributing tank and a plume injecting port; the jet constant-pressure water tank is communicated with the jet paint box by a water pipe; and the plume constant-pressure water tank is communicated with the plume paint box by a water pipe. The model experiment device can be used for basic application research on indoor airflow organization so as to overcome the defects of inaccurate calculation of a current air distribution jet formula, low credibility of CFD (Computational Fluid Dynamics) numerical simulation, high cost of air model experiment and difficult realization of visualization and the like.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Impact point prediction model generation and positioning methods for rocket debris
InactiveCN105894126AEliminate systematic errorsThe drag coefficient is accurateForecastingPoint dataRocket
The invention provides impact point prediction model generation and positioning methods for rocket debris. The impact point prediction model generation method comprises the steps of establishing a dynamic equation of the booster debris flight; fitting a drag coefficient in the dynamic equation using telemetering inertial navigation data of rocket booster debris separation points in all previous missions, upper air data and actual impact point data of the booster debris; then calculating a spreading region of the rocket booster debris according to the calculation impact points of the rocket booster debris in all the previous missions and actual impact points of four boosters; and thus generating a impact point prediction model of the rocket debris. According to the generated impact point prediction model of the rocket debris, the invention further provides a positioning method for the rocket debris. The positioning method is high in theoretical property, simple, and fast and easy to implement, and has significant economic benefits.
Owner:王景国 +2
Compound energy storage system capacity configuration method and terminal equipment
ActiveCN107994593AStrong theoreticalSimple calculationAc network load balancingResourcesDemarcation pointSystem capacity
The invention is applicable to the technical field of distributed power generation, and particularly relates to a compound energy storage system capacity configuration method and terminal equipment. The method comprises the steps of obtaining a theoretical power requirement of a compound energy storage unit under an application scene, and importing the compound energy storage unit; determining a frequency demarcation point according to technical and economic features and theoretical power requirements of the compound energy storage unit; according to the frequency demarcation point, determining theoretical power requirements of all single energy storage units in the compound energy storage unit; building a full-life-cycle economic model of the compound energy storage unit according to rated power and rated capacity of the single energy storage units; determining the optimum capacity matching ratio of the compound energy storage unit according to the entire-life-cycle economic model. According to the technical scheme, the entire-life-cycle economic model determines the optimum capacity matching ratio of the compound energy storage unit, the determination is not simply based on empirical anymore, the theoretical property is good, calculation is simple and accurate, and the method has very high applicability and feasibility.
Owner:囯网河北省电力有限公司电力科学研究院 +2
Technique optimization method of cage roll forming machine set of longitudinal welded pipe
The invention discloses a technique optimization method of a cage roll forming machine set of a longitudinal welded pipe, belonging to the technical field of mechanical forming, wherein forming technique parameters are obtained by coordinate transformation and iterative process; the invention aims at solving the problem that the current welded pipe manufacturing enterprises basically rely on experience and a cut and try method to obtain the forming technique parameters of cage roll forming machine sets of welded pipes; and the technique optimization method disclosed by the invention has the advantages of providing a better theoretical reference for design methods of cage roll forming technique parameters, shortening the development periods of products with new specifications, decreasing raw material waste and reducing the production cost of longitudinal welded pipes.
Owner:SHANGHAI JIAO TONG UNIV +1
Porous cement concrete leachate and preparation method thereof, and method for detecting biological toxicity of leachate
ActiveCN107907389AStrong theoreticalEasy to operatePreparing sample for investigationMaterial testing goodsToxicityEcological environment
The invention provides a porous cement concrete leachate and a preparation method thereof, and a method for detecting the biological toxicity of the leachate. The preparation method of the leachate comprises: immersing a porous cement concrete sample block in pure water with a neutral pH value after curing; detecting the pH value of the reaction system every a certain time; and after the pH valueis stabilized, takigng out the porous cement concrete sample block to obtain the leachate. The detection method comprises: respectively placing juvenile zebrafishes in the porous cement concrete leachate and a standard buffer liquid, culturing for 0-96 h, and determining the toxicity condition of the leachate. According to the present invention, the detection method has advantages of practical significance, strong theoreticality, simple operation, strong adaptability and the like, can be used for judging whether various porous cement concretes have characteristics of environmental protection and biocompatibility, and the leachates can be directly recycled and affect the ecological environment in the nearby drainage basin.
Owner:TONGJI UNIV
Multi-pore cement concrete with photocatalytic purification effect
InactiveCN109987967AStrong theoreticalEasy to operateWater/sewage treatment by irradiationWater treatment compoundsPollutantTitanium dioxide
The invention provides a multi-pore cement concrete with photocatalytic purification effect. The upper layer of the multi-pore cement concrete is coated by nanometer titanium dioxide dispersion liquid. The purification effect of multi-pore cement concrete pavement on organic pollutant, ammonia nitrogen pollutant and phosphorus pollutant is improved. The invention can improve the purification effect of the multi-pore cement concrete sample block to the rainwater runoff pollutant, especially to the ammonia nitrogen pollutant and the organic pollutant after adding the nanometer titanium dioxide dispersion liquid, so as to greatly improve the purification effect on the ammonia nitrogen pollutant and the organic pollutant. Therefore, the purification method can directly and effectively improvethe purification effect of multi-pore cement concrete, in order to effectively alleviate the pollution problem of runoff sewage.
Owner:河北曲港高速公路开发有限公司 +1
Dynamic brain network analysis method for emotion awakening degree
ActiveCN112450947AShow dynamicsReflect changes in brain stateSensorsPsychotechnic devicesEmotional arousalBrain state
The invention discloses a dynamic brain network analysis method for an emotion awakening degree. Data is segmented by adopting a sliding time window, and a brain function network is established through a transfer entropy. Segmented brain networks are connected into a dynamic brain network according to a time sequence, and the dynamic brain network is used for displaying detailed dynamic changes ofa subject in an experimental stimulation process. In order to ensure that dynamic connection is real and reliable, clustering and substitution sequences are used for testing and analysis. Finally, data is optimized by using optimally calculated feature-channel specification information, and an activity level is evaluated, so that a result is clearer. Guidance and a basis are provided for searching for potential important stimulation segments. Compared with a traditional static brain network, the method has the advantages that the brain function network is established in a more reasonable andscientific manner, the changes of a brain state in the experimental stimulation process can be observed and analyzed more carefully, and a network structure and result analysis can be effectively simplified through proposed features.
Owner:HANGZHOU DIANZI UNIV
Cold-rolled sheet residual stress prediction and measurement method
ActiveCN111157157AImproving the quality of high-strength steel productsImprove product qualityForce measurementMaterial strength using tensile/compressive forcesWire cuttingRadius of curvature
The invention discloses a cold-rolled sheet residual stress prediction and measurement method, and belongs to the technical field of steel material stress-strain detection methods. According to the technical scheme, the method comprises the following steps: selecting two groups of cubic samples X with certain sizes of length * width * length from a cold-rolled sheet before forming by utilizing a linear cutting method; attaching a strain gauge or a strain rosette to the geometric center of the material in each group of samples along the rolling direction and the transverse direction respectively, and measuring the initial strain of each group of samples in the state; obtaining the relationship between the bending moment and the size change of the sample by using bending equipment and contour scanning equipment; detecting the curvature of the sample by using a contour scanner; obtaining the relationship between the surface strain and the curvature radius of the sample; and calculating the residual stress through a calculation formula. According to the method, the residual stress distribution in the thickness direction of the plate can be effectively predicted through a pure bending method, accurate data can be provided for subsequent cold rolling plate residual stress control, and therefore reliable technical support is provided for improving the product quality.
Owner:HEBEI IRON AND STEEL
Method for increasing yield by utilizing weather conditions to increase weight of inferior grains of winter wheat
InactiveCN103947401ARaise the ratioImprove biochemical efficiencyBiocidePlant growth regulatorsFructificationWheat grain
The invention discloses a method for increasing yield by utilizing weather conditions to increase the weight of inferior grains of winter wheat, which includes a fertilization measure for the winter wheat spike differentiation period, a dry-wet alternate irrigation measure for the winter wheat fructification period and an ABA spraying measure for the filling period after the flowering of winter wheat. According to weather conditions, the phasic development process of wheat is artificially controlled, so that the growth and development of inferior grains are controlled, uncontrollable weather resources are actively transformed into useful conditions, and by integrating weather conditions with the usage of exogenous hormone ABA in the phasic development process of wheat, the invention puts forward a complete new set of winter wheat cultivation method which can increase the weight of inferior grains of wheat and the uniformity of wheat grains.
Owner:SHANDONG AGRICULTURAL UNIVERSITY +1
Purifying method for rainwater runoff pollutants and purifying material containing activated carbon
InactiveCN108585099AImprove purification effectFlexible responseWater contaminantsTreatment involving filtrationActivated carbonPurification methods
The invention provides a purifying method for rainwater runoff pollutants and a purifying material containing activated carbon. The purifying method comprises the following steps: water-purifying filter material activated carbon and porous cement concrete aggregate are added for purifying the rainwater runoff pollutants, and the water-purifying filter material activated carbon is laid under the porous cement concrete aggregate, wherein the rainwater runoff pollutants include suspension pollutants, ammonia nitrogen pollutants and total phosphorus pollutants, and the purifying material comprisesthe porous cement concrete aggregate and the activated carbon laid under the porous cement concrete aggregate. According to the invention, the purification effect of the porous cement concrete aggregate on the rainwater runoff pollutants can be improved after the water-purifying filter material activated carbon is added, and in particular, the purification effects on the ammonia nitrogen pollutants and the total phosphorus pollutants are both greatly improved. Therefore, the purification method can directly and effectively improve the purification effect of the porous cement concrete, and canbe flexibly applicable to the environments of different pollutants, so that the pollution problem of runoff sewage can be effectively solved.
Owner:TONGJI UNIV
Device and method for testing micro-bending loss of optical fiber in OPLC cable
PendingCN110118644AHigh precisionEasy to operateTesting optical propertiesTesting fibre optics/optical waveguide devicesRepetitive questionsOptical power meter
The invention discloses a device and method for testing micro-bending loss of an optical fiber in an OPLC cable. The device comprises a micro-bending model of the optical fiber, an optical power meterand the like. When testing, the micro-bending model is set on a displacement platform, the single-mode optical fiber to be tested passes through the micro-bending model of the optical fiber, and a displacement platform controller is used to adjust the displacement of the displacement platform such that the single-mode optical fiber is sandwiched between the fixed end and the movable end of the displacement platform; both ends of the single-mode optical fiber are respectively connected to the light source and the optical power meter through an optical fiber jumper, and movement of the displacement platform is used to obtain different optical powers stored on the computer. The device and method provided by the invention accurately manufacture a plurality of micro-bending models through 3D printing technology, and solve the problem that the existing micro-bending test method is difficult to achieve accuracy, high efficiency and repeatability. The matched movement of the displacement platform and the micro-bending model is controlled by the computer, and the single-mode optical fiber is squeezed with different precisions to achieve different micro-bending effects, so that the technical problems lacking experimental and theoretical basis in the prior art are solved.
Owner:XI AN JIAOTONG UNIV +2
Purifying method for rainwater runoff pollutants and purifying material containing zeolite
PendingCN108585098AImprove purification effectFlexible responseWater contaminantsWater/sewage treatment by ion-exchangePurification methodsSewage
The invention provides a purifying method for rainwater runoff pollutants and a purifying material containing zeolite. The purifying method comprises the following steps: water-purifying filter material zeolite and porous cement concrete aggregate are added for purifying the rainwater runoff pollutants, and the water-purifying filter material zeolite is laid under the porous cement concrete aggregate, wherein the rainwater runoff pollutants include suspension pollutants, ammonia nitrogen pollutants and total phosphorus pollutants, and the purifying material comprises the porous cement concreteaggregate and the zeolite laid under the porous cement concrete aggregate. According to the invention, the purification effect of the porous cement concrete aggregate on the rainwater runoff pollutants can be improved after the water-purifying filter material zeolite is added, and in particular, the purification effects on the ammonia nitrogen pollutants and the total phosphorus pollutants are both greatly improved. Therefore, the purification method can directly and effectively improve the purification effect of the porous cement concrete, and can be flexibly applicable to the environments of different pollutants, so that the pollution problem of runoff sewage can be effectively solved.
Owner:TONGJI UNIV
Separation-collection device for gas-phase nicotine and particle-phase nicotine in aerosol and method of separation-collection device
PendingCN107621392AStrong theoreticalImprove accuracyComponent separationWithdrawing sample devicesTraffic volumeDispersion coefficient
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC
Novel oil-gas-water split-phase flow online metering device and novel oil-gas-water split-phase flow online metering method
ActiveCN108254034ASimple structureSmall footprintVolume flow proportion measurementDifferential pressureMathematical model
The invention discloses a novel oil-gas-water split-phase flow online metering device and a novel oil-gas-water split-phase flow online metering method. The novel oil-gas-water split-phase flow onlinemetering device comprises a Y-shaped filter, a flow straightener, a detection pipe, a temperature and pressure integrated sensor, a throttling mechanism, a transition pipe, a high-pressure differential pressure gauge and a water content analyzer. The novel oil-gas-water split-phase flow online metering device and the novel oil-gas-water split-phase flow online metering method have the advantagesthat separate metering is omitted, and accordingly the novel oil-gas-water split-phase flow online metering device is simple in structure, small in occupied area and convenient to mount; gamma ray processes for computing gas contents are omitted, accordingly, environmental hazards due to rays can be reduced, and the novel oil-gas-water split-phase flow online metering device is long in service life and low in cost; differential pressure devices and water content instruments are integrated on the single novel oil-gas-water split-phase flow online metering device by independent modules, and accordingly the novel oil-gas-water split-phase flow online metering device can be conveniently and quickly mounted; mathematical models are built by the aid of the traditional differential pressure processes, and accordingly the novel oil-gas-water split-phase flow online metering method is high in theoretical property and technical maturity; models are optimized by the aid of large quantities of experiments, and accordingly oil-gas-water three-phase contents and split-phase flow which are computed by the aid of the novel oil-gas-water split-phase flow online metering device and the novel oil-gas-water split-phase flow online metering method are high in accuracy.
Owner:ANHUI FIRSTCON INSTR +1
Optimal distribution method and system for pollution loads entering river
ActiveCN111597693AStrong theoreticalIncrease upper and lower limitsGeneral water supply conservationForecastingBackground concentrationsPollutant emissions
The invention discloses an optimal distribution method and system for pollution loads entering river, and belongs to the technical field of pollutant discharge total quantity control, and the method comprises the steps: collecting original data of a to-be-studied region water body and cost data needed by each pollution source to reduce pollutants, and building a hydrodynamic water quality model through the original data; determining the background concentration of a target assessment section of the to-be-studied area; when one pollution source is controlled to be discharged each time, utilizing the hydrodynamic water quality model to calculate the target assessment section concentration after the pollution source is discharged; calculating a pollution contribution coefficient of each pollution source unit load according to a partition standard reaching method; and performing total quantity distribution by adopting a partition standard reaching method, establishing an optimal distribution model in combination with the cost data required for reducing the pollutants by each pollution source, and determining a total quantity distribution scheme of the river or the river surge in the to-be-researched area. According to the method, assessment section standard reaching and economic optimization are considered at the same time, and economic cost is saved.
Owner:中节能国祯环保科技股份有限公司
Purification Method of rainwater runoff pollutants and purification material containing quartz sand
PendingCN108483549AImprove purification effectFlexible responseWater contaminantsRunoff/storm water treatmentPurification methodsPollution
The invention provides a purification method of rainwater runoff pollutants and a purification material containing quartz sand. The purification method comprises: the rainwater runoff pollutants are purified by adding water purification filter material quartz sand and porous cement concrete aggregate; the water purification filter material quartz sand is laid below the porous cement concrete aggregate; the rainwater runoff pollutants comprise suspended solids, ammonia nitrogen pollutants and total phosphorus pollutants; and the purification material comprises the porous cement concrete aggregate and the quartz sand laid below the porous cement concrete aggregate. By adding the water purification filter material quartz sand, the purification effect of the porous cement concrete aggregate onthe rainwater runoff pollutants is improved, especially the purification effect on the ammonia nitrogen pollutants and the total phosphorus pollutants is greatly improved. Therefore, the purificationmethod can directly and effectively improve the purification effect of the porous cement concrete, and can flexibly cope with the environment of different pollutants, thereby effectively alleviatingthe pollution problem of runoff sewage.
Owner:TONGJI UNIV
System and method for monitoring scaling rate and deposition rate of circulating cooling water
ActiveCN111693399APrevent affecting the thermal resistance valueAffect thermal resistanceMaterial heat developmentWeighing by absorbing componentUltrafiltrationElectrodialysis
The invention provides a system and a method for monitoring the scaling rate and the deposition rate of the circulating cooling water. The monitoring system comprises two loop systems, wherein suspended matters, microorganisms, colloids and other substances in the water can be separated and removed from the water by a loop system where an ultrafiltration device is located, a scaling rate is testedby utilizing residual ions, ions in the water can be separated and removed from the water by a loop system where an electrodialysis device is located, and the deposition rate is tested by utilizing residual microorganisms, organic matters and colloid. according to the monitoring method, a heat transfer coefficient is calculated through a plurality of sets of test data, then expectation of the heat transfer coefficient is obtained, then the linear relation between the mass variation and the heat transfer coefficient is obtained, and the scaling rate and the deposition rate can be calculated online in real time in combination with a temperature sensor, a flow sensor and an industrial computer. The test device is simple, the test method is high in theoretical property, and real effectivenessof test data is fully met.
Owner:沈阳艾柏瑞环境科技有限公司
Piezoelectric ceramic sensitive module and hydraulic concrete structure health monitoring test platform
InactiveCN103472130AImprove engineering applicabilityStrong theoreticalAnalysing solids using sonic/ultrasonic/infrasonic wavesElectricityStructure health monitoring
The invention discloses a hydraulic concrete structure health monitoring test platform based on a piezoelectric ceramic sensitive module. The test platform is characterized by comprising a signal generation device (1), a signal acquisition device (2), a driver (3), a sensor (4), a digital filter (5), and a control computer platform (6) equipped with MATLAB / Simulink, wherein signals sent out by the signal generation device (1) enter the control computer platform (6) equipped with MATLAB / Simulink after passing through the driver (3), the sensor (4), the digital filter (5) and the signal acquisition device (2) in sequence. The reliable test platform is provided for a series of research on problems of strength, structure damage, natural vibration frequency identification and the like of hydraulic concrete. With the assistance of the platform, a hydraulic concrete health monitoring system based on the piezoelectric ceramic sensitive module can be comprehensively established, and an essential test device and an essential test method are provided for application of the piezoelectric ceramic sensitive module to dam safety monitoring.
Owner:HOHAI UNIV
Method and device for determining minimum miscibility pressure of oil and gas
InactiveCN111256900BImprove accuracyFast convergenceFluid pressure measurementMaterial testing goodsFluid phaseCapillary pressure
Owner:CHINA UNIV OF PETROLEUM (BEIJING) +1
Blast furnace distribution adjustment method and equipment based on blast furnace condition classification and storage equipment
ActiveCN109022654AImprove reliabilityImprove applicabilitySteel manufacturing process aspectsBell-and-hopper arrangementWavelet noiseState parameter
The invention provides a blast furnace distribution adjustment method and equipment based on blast furnace condition classification and storage equipment. Firstly, a wavelet noise removing method anda vague C mean value algorithm are adopted to obtain history blast furnace condition classification types and furnace state parameter clustering centers; different blast furnace condition classification types correspond to selected history distribution operation parameters one to one to determine history edge ore-coke ratio and center ore-coke ratio ranges for different blast furnace condition types; then, present blast furnace condition types are determined according to the obtained present blast furnace state parameters and the blast furnace state parameter clustering centers; and then, present blast furnace edge ore-coke ratio and center ore-coke ratio adjustment ranges are determined. The blast furnace distribution adjustment equipment based on blast furnace condition classification and the storage equipment are used for the blast furnace distribution adjustment method based on blast furnace condition classification. The distribution adjustment method has the beneficial effects ofhigh theoretical property and improvement of the distribution adjustment reliability, adaptability and practicability.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Theoretical calculation method for water content of mixed material of cement stabilized macadam road pavement
InactiveCN106447541AOptimal water contentBest moisture contentData processing applicationsMixed materialsRoad surface
The invention discloses a theoretical calculation method for the water content of a mixed material of a cement stabilized macadam road pavement, and aims to determine an optimal water content of the mixed material of the cement stabilized macadam road pavement, and the optimal water content of the mixed material can be relatively precisely and reasonably determined with comparison with an indoor testing result. The theoretical calculation method comprises the following steps: performing theoretical calculation on the standard water rate of cement in a test part used in an indoor test, the water absorption rate of an aggregate and the water rate of a middle gap of the mixed material, converting calculated results into the water amount of the cement in the test part, the water absorption amount of the aggregate and the water amount of the middle gap of the mixed material so as to determine an actual optimal water amount of the mixed material, and further converting the optimal water amount of the mixed material into the optimal water content of the mixed material. By adopting the theoretical calculation method, the situation that the optimal water content of the mixed material can be only determined by using an indoor testing method can be changed, the proportioning rate of the water content of the mixed material of the cement stabilized macadam road pavement can be relatively and reasonably designed, the construction quality can be improved, rework can be avoided, and the production cost can be lowered.
Owner:中石化石油工程技术服务有限公司 +1
Travel/activity behavior selection model parameter calibration method based on least square method
PendingCN112488381AImprove applicabilityStrong theoreticalForecastingComplex mathematical operationsModel parametersIndustrial engineering
The invention discloses a travel / activity behavior selection model parameter calibration method based on a least square method, which is used for solving the problem of model parameter calibration inurban traffic planning. The method comprises the following steps: (1) defining a data type and carrying out preprocessing; (2) taking a least square method as a core, designing an upper-layer optimization model, and solving parameter optimal estimation of a travel / activity behavior selection model; (3) taking traffic distribution as a core, designing a lower-layer optimization model, and solving flow distribution in the traffic network; (4) solving the double-layer optimization model by adopting a simulated annealing method to obtain estimated values of parameters; and (5) smoothing the estimated value of the parameter by using a Kalman filter, and outputting a final calibration value of the parameter. By applying the method provided by the invention, parameter calibration can be effectively carried out on a travel / activity behavior selection model, the method has wide applicability, and the input data volume and the accuracy of the model can be adjusted as required.
Owner:SOUTHEAST UNIV
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