69results about How to "Strong theoretical" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention relates to a separation-collection device for gas-phase nicotine and particle-phase nicotine in aerosol. The separation-collection device comprises a clamping device, a filter piece capturing device and a dump pump. The separation-collection device is characterized in that an dispersion pipe is arranged between the clamping device and the filter piece capturing device and is locatedin a constant-temperature water bath, the inner wall of the dispersion pipe is coated with a citric acid solid coating layer, and the dispersion pipe is a high-purity silica glass straight pipe with an inner diameter of 8mm and a length of 1000mm. The device for separating the gas-phase nicotine and the particle-phase nicotine has the principle that smoke aerosol containing the gas-phase nicotineand the particle-phase nicotine is pumped into the dispersion pipe in certain flow with a laminar flow state by virtue of the pump, the radial diffusion rate of the gas-phase nicotine is larger than that of the particle-phase nicotine because of the difference of mass transfer dispersion coefficients of the gas-phase nicotine and the particle-phase nicotine, the gas-phase nicotine is firstly absorbed by the citric acid solid coating layer on the inner wall of the dispersion pipe, and the particle-phase nicotine flows out of the dispersion pipe along the axial motion of the aerosol and is captured and absorbed by virtue of a Cambridge filter at an outlet of the dispersion pipe, so that the gas-phase nicotine and the particle-phase nicotine are separated and are respectively captured.

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.

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.

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.