472 results about "Influence coefficient" patented technology

The invention relates to battery set thermal management technique, which is characterized by the following: getting nickel and hydrogen battery even thermal proportion based on experiment, thermal speed and battery balance motion temperature parameters; in computer, establishing battery thermal module to use software Fluent to get inside temperature field distribution; then using natural wind temperature difference and even current as input to establish one temperature difference module to reflect current, work time and surface transmission parameters.

The invention provides a fuel gas pipeline risk assessment method based on Mu model. The method comprises the following steps: (1) dividing a fuel gas pipeline into sections; (2) classifying parameters causing pipeline risk and distributing weightings according to the degree of impact of each parameter on the pipeline risk; (3) through the parameters and weightings of the step (2), carrying out risk assessment of each factor for the pipeline and working out an exponential sum; (4) calculating the fuel gas pipeline leakage influence coefficient according to the risk and influence surface of a conveyance medium; (5) working out a relative risk value integrally according to the exponential sum of the step (3) and the leakage influence coefficient of the step (4);(6) analyzing the relative risk value obtained in the step (5) to obtain a risk conclusion. The invention adjusts the factor weightings of the Mu model risk assessment and is provided with the fuel gas leakage influence coefficient to be computed, thereby bringing about more adaptability and more accurate and reliable assessment results.

The invention discloses a correction method of bicycle impact on saturation volume rate of turning motor vehicles at a signalized intersection, which can be applied to calculating timing of signal control at the intersection. The correction method divides a conflict between bicycles and turning motor vehicles into two phases by studying different states of bicycles which cross the intersection and defines a conflict area; in the first stage, the gathered waiting bicycles during the red light period cross the intersection in the manner of bicycle groups with high density and low freedom, and the conflict is analyzed based on time occupation ratio of the conflict area by bicycles; in the second stage, bicycles arriving randomly at the intersection in a random manner with low density and high freedom, and the conflict is analyzed based on a crosscutting gap theory, and an influence coefficient of the bicycles on the saturation volume rate of turning motor vehicles is calculated. By applying the timing at intersection calculated by adopting the correction method of the bicycle impact on saturation volume rate of turning motor vehicles at a signalized intersection to the practice, the conflict between motor vehicles and non-motorized vehicles at the intersection can be relieved, traffic capacity of the intersection can be improved, and delay of motor vehicles at the intersection can be reduced.

The invention discloses a traction transformer winding temperature rise and oil flow speed relevance testing method. The traction transformer winding temperature rise and oil flow speed relevance testing method comprises the following steps of (1) testing temperature rise of a winding of a transformer under different loads and oil flow speed at the position of an outlet of a heat sink under the condition that environment temperature and heat dissipation conditions are not changed, and calculating a fitting function of the temperature rise of the winding in regard to the oil flow speed at the position of the outlet of the heat sink; (2) changing the environment temperature under the condition that the loads and the heat dissipation conditions are not changed and calculating an influence coefficient of the environment temperature on the temperature rise of the winding in regard to the oil flow speed at the position of the outlet of the heat sink; (3) changing the heat dissipation conditions of the heat sink under the conditions that the load and the environment temperature are not changed and calculating an influence coefficient of the heat dissipation conditions on the temperature rise of the winding in regard to the oil flow speed at the position of the outlet of the heat sink; (4) determining a modified function of temperature rise of the winding in regard to the oil flow speed at the position of the outlet of the heat sink under various influence factors; and (5) determining temperature rise of the winding on the basis of a determined fitting function of the oil flow speed and the temperature rise of the winding in regard to the oil flow speed at the position of the outlet of the heat sink. By the traction transformer winding temperature and oil flow speed relevance testing method, a reliable testing platform can be provided for research of temperature rise of the winding of the energy-saving type traction transformer, and the temperature rise of the winding can be measured in real time on the basis of a determined relevance curve.

The invention relates to an automatic combustion control technology of a blast-furnace hot blast stove. The invention discloses a self-optimizing combustion control method of a blast-furnace hot blaststove. Air-fuel ratio K is used for replacing gas calorific value, current waste gas temperature subtracts waste gas temperature of the previous several minutes, the obtained value divides the current vault temperature, and then the obtained value subtracts the vault temperature value of the previous several minutes to replace an air excess coefficient; according to the current gas pressure, theinfluence coefficient of the vault temperature by calorific value of gas, the influence coefficient of the vault temperature by combustion time and the influence coefficient of the vault temperature by gas flow are calculated; the calculated coefficients are aligned into a sequence; from the point that the vault temperature is higher than 1100 DEG C, the coefficient in the vault temperature is averaged when the vault temperature rises by 1 DEG C, and the array of a group of coefficients is formed when temperature changes by 1 DEG C; when the vault temperature changes by 1 DEG C, the calculatedcoefficient array is compared with the array corresponding to the vault temperature in a sequence group produced by combustion in the previous round; and a new air-fuel ratio is calculated. The invention is easy to realize and has high reaction speed.

The invention discloses an influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting. The influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting comprises the steps that 1, designating a shafting balancing revolving speed point, balancing planes and numbers of measured points; 2, an initial deflection value of a spindle and an initial vibration value are measured under a slow revolving speed of 300rpm; 3, a vibration response of the measured points on a bearing after trial mass is conducted on a plurality of balancing planes on the shafting; 4, the minimum value of the residual vibration amplitude epsilon of all vibration measured points after the rotor is balanced is set as a goal, a vibration response vector equilibrium equation is established, and a size and angel of a balance weight Q on the unit shafting are obtained; 5, the vibration value of all vibration measured points are read, the above steps 2, 3, and 4 can be repeated once the value is unsatisfied. The influence coefficient dynamic balance method on rotating machine with multiple plane, multiple-points and multiple revolving speed shafting has a overall consideration on vibration with multiple plane, multiple-points and multiple revolving speed shafting, and a seesaw phenomenon in the traditional dynamic balance process is effectively avoided.

The invention relates to a Berkeley short-channel insulated gate field effect transistor (IGFET) model 4 (BSIM4) stress model applied to metal-oxide-semiconductor field effect transistor (MOSFET) electrical simulation. On the basis of a standard BSIM4 model, layout parameters capable of generating stress are used as entity parameters, wherein a value of each layout parameter is a designed layout size, and the layout parameters comprise space between adjacent polysilicon (PC), the number of dummy PC, space between shallow trench isolation (STI) and the PC, space between Nwell and the PC and space between the boundaries of the Nwell and oxides (OD); layout parameters and influence coefficients are added, wherein the layout parameters are fitting parameters for expressing an effective value of each layout parameter, and the influence coefficients are fitting parameters for expressing the influence degree of each layout parameter on basic parameters Vth0 and mu 0 of the BSIM4 model; and amethod for determining the change characteristics of saturated threshold voltage Vtsat and saturated drain current Idsat of a transistor according to the layout parameters is provided, namely the influence of the layout parameters on the threshold voltage Vth0 of a long-channel device under zero substrate bias and mobility mu 0 under a low electric field is considered on the basis of the standardBSIM4 model; and the threshold voltage Vth0 of the long-channel device under the zero substrate bias and the mobility mu 0 under the low electric field are defined again.

The invention discloses a calibration method of charge and discharge characteristics of a lithium battery. The calibration method includes 1, subjecting a lithium battery to be tested to constant-current charging and finishing the charging once the battery voltage reaches to the rated maximum voltage; calculating battery level after charging, in the formula, t1 is the charging time, i is charging current, and Eta is battery efficiency coefficient, to be specific, the Eta=EtaT*Etat*Etai, EtaT is temperature influence coefficient, Etat is aging coefficient, and Etai is charge and discharge multiplying factor coefficient; subjecting the lithium battery to be tested to discharging and finishing the discharging once the real-time voltage reaches to the rated minimum voltage; calculating the maximum charging capacity Q2, in the formula, i is discharging current, t2 is discharging time, and Eta is battery efficiency coefficient; according to Q1 and Q2, calibrating the initial charging state of the battery and drawing function curve of the charging voltage-SOC. The calibration method is available in a charge and discharge characteristics calibration apparatus, accurate to calculate and wide in application range. The charge and discharge characteristics calibration apparatus is simple in circuit, light and small and easy to operate.

The invention relates to a telephone traffic system and discloses a method and a device for call center multifactorial telephone traffic prediction. According to the method, a traffic prediction result can be calculated according to a weekly rule correction coefficient, a monthly rule correction coefficient, a holiday influence coefficient and a special event influence coefficient and is further outputted. A controller internally comprises a professional maintenance module, a prediction project configuration module, a holiday maintenance module, a multifactorial data acquisition module, a special event management module, a traffic prediction module and a prediction result display module connected with an output device. The method has property of wide application scenes, and call center traffic prediction demands of different industries such as telecommunication communication, aviation, finance and electric power can be satisfied.

The invention discloses a determination method for a rainstorm-induced shallow landslide disaster warning threshold value. The method comprises the steps of first, performing slope unit division basedon a DEM (Digital Elevation Model); then, establishing a stability analysis warning model based on the slope units and a critical infiltration capacity; setting five warning grades, and calculating acritical infiltration capacity threshold value of each of the five warning grades according to a meaning represented by an FS (Factor of Safety) index; and finally, establishing a landslide rainfall-infiltration model based on the slope units, calculating a relation between the infiltration capacity and a rainfall capacity of each slope unit under a specific raining condition, and reversely deducing a critical rainfall capacity of each slope unit through the critical infiltration capacity. According to the determination method for the rainstorm-induced shallow landslide disaster warning threshold value, the slope units and rainstorm influence coefficients are imported into rainstorm-induced shallow landslide mass measurement modeling, thereby improving the work efficiency of landslide warning, improving the spatial precision of landslide warning and providing basic data for researches of landslide control. The method can be applied to landslide disaster warning work in a mountainousarea and provide scientific basis for disaster prevention and reduction of the mountainous area.

The invention discloses a runoff predicting method. The method comprises the following steps of: establishing a rainfall runoff yield model; carrying out parameter calibration on the rainfall runoff yield model by adopting rainfall and runoff data of farmland or a region obtained through observation, and determining a runoff yield influence coefficient K of antecedent rainfall and a rainfall initial loss value Id under the condition that no antecedent rainfall exists for a long time; and acquiring the daily rainfall P of a current day and the actual daily rainfall Pi of an antecedent i-th day of the farmland or region, and obtaining surface runoff Q according to the rainfall runoff yield model. The method disclosed by the invention has the advantages that higher surface runoff prediction accuracy is obtained while less monitored data are adopted.

The invention discloses a method for setting, predicting and self-learning skin-pass rolling pressure, which comprises the following steps: a. collecting n groups of actual skin-pass rolling process parameters and n groups of actual rolling pressure data corresponding to the parameters; b. introducing steel grade of a planishing mill a0 and influence coefficients of working conditions a1, structuring a basic rolling pressure model which is suitable for the skin-pass rolling and reflects the basic functional relationship between each rolling process parameter and rolling pressure; c. calculating initial optimal values of the steel grade a0 and the influence coefficients of the working conditions a1; d. completing the correction of the initial optimal values of the steel grade a0 and the influence coefficients of the working conditions a1; e. setting and predicting the skin-pass rolling pressure; f. and self-learning the skin-pass rolling pressure model. Through continuously self-learning the steel grade and the influence coefficients of the working conditions, the invention effectively guarantees the calculation accuracy of the model on the premise of not damaging the physical significance of key rolling parameters such as friction coefficient and deformation resistance. At the same time, the method of the invention is clear in theory and rapid in calculation, thus the method is suitable for online application.

The invention discloses a vector spectrum based dynamic balance method for flexible rotors. Imbalance failure of the rotors on site can be truly and objectively found by a vector spectrum analysis software, the power-frequency principal vibration vector of the rotors on vibration measuring sections can be extracted by vector spectrum filtering method by measuring the original vibration signals of two mutually perpendicular channels on the vibration measuring sections; the principal vibration vector is used as the substitute of the amplitude and the phase of the power frequency of the rotors extracted in traditional single-channel signals; on-site dynamic balance is conducted by combing with influence coefficient method, and the balance process is less dependent on the experience and knowledge of operators, can greatly improve the efficiency and accuracy of the flexible rotor dynamic balance and is a highly integrated computer-assisted on-site dynamic balance method.

The invention discloses a method for controlling an asymmetric transverses shifting plate shape of an asymmetric bending roller of a HC rolling mill. The method comprise the following steps of: (a) collecting equipment and process parameters of an HC rolling mill and band steel; (b) discretizing a roller system and a rolling piece unit; (c) computing a preceding tensile stress lateral distribution value and a unit width rolling pressure, which comprise the following steps implemented by a computer system; (d) setting bending roller influence coefficients of a supporting roller, a middle roller and a working roller during an asymmetric rolling according to an asymmetric rolling stressed model of the HC rolling mill; and (e) establishing an asymmetric rolling roller system model on the basis of a model partitioning influence coefficient method. The invention provides a roller system elastic distorted model and a metal three-dimensional plastic distortion model which are suitable for the HC rolling mill; and the preceding tensile stress and a plate convexity of the roller system elastic distorted model and the metal three-dimensional plastic distortion model are in an asymmetric distribution, the error compared with a measured value is small and precision is high. After changing adjusting parameters of the plate shape, the asymmetric rolling controlling model is also suitable for symmetric rolling; and the invention improves plate shape controlling ability of the HC rolling mill and achieves precision requirements of industrial application.

The invention discloses a technique for forecasting working roll abrasion, which is suitable for a four-roller cold continuous rolling mill and is based on the combination of a mechanism and an operating condition. The technique is characterized by comprising the following steps: a, constructing a working roll abrasion model; b, constructing an influence equation of the working roll abrasion operating condition; c, constructing a mechanism influence equation in the working roll abrasion loss; d, analyzing and calculating a mechanism influence part in the working roll abrasion; e, measuring and collecting actual data of the working roll abrasion; f, solving an operating condition influence coefficient alpha; g, establishing a forecasting model of the working roll abrasion on the basis of the combination of the mechanism and the operating condition; and h, forecasting the working roll abrasion in a specific rolling cycle. The technique for forecasting the working roll abrasion sufficiently considers the characteristics of devices and the operating condition in the process of cold continuous rolling, organically combines the abrasion mechanism and the measuring result of actual abrasion data in industrial production, is applicable to the symmetrical abrasion and the asymmetrical abrasion of the working roll, greatly improves the forecasting precision for the field working roll abrasion, and lays a foundation for roll shape design and profile shape control.

The invention discloses an urban oil and gas pipeline major accident risk early warning and assessment method, and belongs to the technical field of pipeline risk early warning and assessment. The method comprises the steps that a factor set is determined according to risk factors in the pipeline operating process; weight matrixes of all levels of factor indexes are determined by the use of an interval analytical hierarchy process relative scalar quantity method; risk assessment is conducted on the indexes, so that a warning degree division result is obtained; and risk assessment results of various factors are obtained on the basis of risk quantity indexes, and relative risk values are calculated through the combination of leakage influence coefficients. According to the urban oil and gaspipeline major accident risk early warning and assessment method, a kent pipeline risk assessment method and a risk early warning method are combined, and therefore the purposes that the pipeline warning degree is judged, and an early warning response is conducted can be achieved on the basis of risk assessment of all risk factor warning omens and overall consideration of the pipeline accident occurrence probability and the consequence severity.

The invention relates to a numerical simulation method in the engineering field such as environment, water conservancy and the like and discloses a high-precision difference method with strong universality for series typical model equations suitable for solving problems of flow and heat-mass transfer of various fluids, in particular the problem of transport diffusion. Aiming at the defects that conventional limited difference format of the prior water environment simulation only has low one-order or two-order precision, while the prior multi-step differential equal-high precision method generally relates to a lot of grid points, has over complex construction mode and is most based on quite regular even rectangular meshes, and the like, the invention provides a high-precision difference method under an uneven mesh. The method adopts an indeterminate coefficient method to determine an influence coefficient between a point to be solved and an adjacent point in a difference equation so that the difference format reaches maximum-order precision under the mesh structure. Because the difference format is constructed by adopting an uneven grid system, the density of the mesh distance can be flexibly adjusted according to the size of the variation gradient of physical quantity to be solved, and the simulation precision and efficiency are effectively improved.

The invention provides a three-dimensional numerical simulation method for ship large-scale rolling motion, which comprises the following steps of reading a grid file to carry out ship hydrostatic calculation; calculating an influence coefficient matrix of boundary integral equation for Taylor expansion boundary element method; solving velocity potential of laminated modes and its spatial first and second derivatives and mj terms; carrying out the green's function in time domain and its spatial derivative solution; calculating a roll damping coefficient; carrying out the irregular wave decomposition, linear superposition into incident wave time calendar; carrying out the direct time-domain disturbance wave force calculation by taylor expansion boundary element method; calculating incidentwave force and hydrostatic recovery force; modeling a large-scale motion forecasting equation; using the fourth-order runge-kutta method to solve the motion equation step by step to evaluate the nonlinear motion of the ship in the top wave or oblique wave; and carrying out the numerical simulation and characteristic statistics of ship large amplitude motion in irregular waves. The method of the invention can predict the large amplitude motion of a container ship in regular waves and irregular waves, and can be used for numerical simulation and characteristic statistics of the large amplitude motion of a ship in irregular waves.

The invention discloses a shield tunnel pipe piece designing method taking double-liquid synchronous grouting layer performance degradation into consideration. The method comprises a first step of determining different distributing patterns of gel calcium silicate in cement-water glass double liquid based on careful observation and analysis, a second step of calculating occurrence frequency, occupied area proportion and structural effect influence coefficient of the gel calcium silicate in different distributing patterns, a third step of carrying out discount calculation on the mechanical property of the cement-water glass double liquid which is degraded by the gel calcium silicate according to a calculated result, and a fourth step of calculating the internal force and the deformation of a shield tunnel pipe piece lining structure by the adoption of the modified routine method. By means of the method, an accurate and effective evaluation can be carried out on the long-term mechanical property of the cement-water glass double liquid which is degraded by the gel calcium silicate which is a reaction product of the double liquid, then the evaluation is carried out on the long-term safety performance of a tunnel structure and other building structures using the cement-water glass double liquid, the method is used for designing shield tunnel pipe pieces, and the result is realer and more reliable.

The invention discloses an electrical equipment support-type damping control system and a damper model selecting method and device of the electrical equipment support-type damping control system. Parameters can be collected. The collected parameters comprise parameters of a support which is located at the root portion of electrical equipment and used for bearing the electrical equipment, parameters of the electrical equipment, parameters of a plurality of inclined supporting auxiliary materials which are arranged on the support aslant, an earthquake influence coefficient, an earthquake fortification intensity and field characteristic period, and the number of dampers needing to be arranged on the support. Each damper needs to be arranged between two of inclined supporting auxiliary materials located in the same straight line. Adaptive parameter ranges of the needed dampers are determined according to the collected parameters. The adaptive parameter rangers comprise a yield range, an original rigidity range, a yielded rigidity range and a damping coefficient range. Then, dampers which are matched with the adaptive parameter ranges are selected as the needed dampers. According to the electrical equipment support-type damping control system and the damper model selecting method and device of the electrical equipment support-type damping control system, automatic, high-efficiency and accurate damper model selecting is realized, and the actual anti-seismic capacity of the electrical equipment is improved.