96 results about "Heat equation" patented technology

The present invention discloses a dynamic secondary cooling control method for slab continuous casting based on a double-cooling mode, which comprises the following steps of: collecting casting process data and indexing target cooling temperatures and ABC parameters of each cooling area; dynamically calculating the heat conduction process of a continuously cast slab in the current period according to a heat conduction equation; calculating the temperature tracking error of each cooling area and calculating the water amount of each cooling area in a second cooling mode by taking the temperature tracking error as a regulation factor; respectively calculating the water amount of each cooling area in a first cooling mode based on the ABC parameters and the current casting speed; determining whether the temperature tracking error exceeds a preset threshold and comparing the water amounts in the two modes to determine the cooling mode and the controlled water amount in the current period; and validating the reasonableness of the controlled water amount, and correcting the controlled water amount to be a preset maximum water amount or minimum water amount if the controlled water amount exceeds the preset maximum water amount or minimum water amount. The invention guarantees the quality stability of the cast blank in secondary cooling process.

Providing a probe for an electronic clinical thermometer, which can measure a surface temperature and a deep body temperature of a human body securely in short time, the probe includes a cylindrical housing, a bottomed metal pipe fitted into a top end of the cylindrical housing, and a substrate having two thin-film heat-sensitive elements arranged perpendicularly on an inner wall of the bottomed metal pipe so as to fix one side edge of the substrate tightly on the inner wall. By measuring heat flux between the two thin-film heat-sensitive elements, the surface and the deep body temperatures of the human body can be predicted by applying the measured values into a heat conduction equation without waiting the sensor to reach in heat balance.

A method and system for interactive patient-specific simulation of liver tumor ablation is disclosed. A patient-specific anatomical model of the liver and circulatory system of the liver is estimated from 3D medical image data of a patient. A computational domain is generated from the patient-specific anatomical model of the liver. Blood flow in the liver and the circulatory system of the liver is simulated based on the patient-specific anatomical model. Heat diffusion due to ablation is simulated based on a virtual ablation probe position and the simulated blood flow in the liver and the circulatory system of the liver by solving a bio-heat equation for each node on the level-set representation using a Lattice-Boltzmann method (LBM) implementation. Cellular necrosis in the liver is computed based on the simulated heat diffusion. Visualizations of a computed necrosis region and temperature maps of the liver are generated. A user input is interactively received to modify the position of the virtual ablation probe, the heat diffusion and cellular necrosis is re-simulated based on the user input, and the visualizations of the computed necrosis region and the temperature maps are updated.

A plurality of elements constituting a semiconductor integrated circuit to be designed are each converted to a device model which merges an electric model exhibiting electric characteristics of the element and a thermal model exhibiting thermal characteristics of the element, and a thermal resistor is inserted between the elements where heat exchange occurs, thereby electric and thermal circuits are formed. Then circuit and heat equations are formulated with respect to the electric and thermal circuits, and then the equations are solved together to acquire electric and thermal characteristics of each element in the circuit. As a result, it becomes possible to achieve high-precision device characteristics which precisely reflect the temperature variation of each element in the circuit during simulation.

The invention discloses a silicon melt temperature field reconstruction method based on a free liquid level temperature measurement value and a feature function interpolation. The feature value problem of a heat conduction equation is used for analyzing the silicon melt model of the equal-diameter stage of the two-dimensional axial symmetry crystal growth process of a single crystal furnace, and a feature value and a corresponding feature function are obtained by calculation; a threshold scalar function is used for calculating the function of each feature function for an area to be reduced; a scalar value is set as a measuring standard for selecting the feature function; on the basis of a multi-population genetic algorithm, the arrangement position of a temperature sensor measuring point is optimized; finally, the group of temperature measurement values combined on an optimization position and the selected feature function are used for carrying out calculation to obtain a weight factor which reflects he characteristics of a silicon melt area; and an inner product operation is carried out with the feature function of each point in the silicon melt to obtain the temperature distribution of the silicon melt. By use of the method, the influence of a complex structure for an arrangement temperature sensor is reduced, the method is free from a heat conduction physical problem, and expansibility is good.