17 results about "Length scale" patented technology

The utility model discloses a combined type gap measuring scale which comprises a first plate body and a second plate body which are respectively formed by three edges connected end to end, any acute angle edge of the first plate body is provided with scale marks, the scale marks are composed of a plurality of length scale lines, and the length scale lines are arranged on the first plate body. The numerical value represented by each length scale line is the distance from the point of the length scale line on the acute angle side to the other acute angle side, the second plate body is a right triangle, and at least one edge of the second plate body is provided with an indexing mark. According to the utility model, the first plate body and the second plate body are matched for use, so that other obstacles around cannot interfere with the caliper during measurement; the right angle can be used to determine whether to be perpendicular to the measured object. According to the utility model, the integrated characteristic of a vernier caliper is abandoned, mechanical structures such as a combined bayonet are not provided, the overall structure is simple, the manufacturing cost is low, and the measurement precision is improved.

The invention discloses a strong shear turbulence grid adaptive simulation method coupled with a k-omega series model. The method mainly comprises the following steps of: 1, judging whether a shielding function is applied or not; step 2, identifying a self-adaptive length scale of a shear layer; 3, constructing a scale-related adjustment function based on the turbulence energy spectrum integral; 4, reconstructing the turbulence viscosity of the k-omega series model by using an adjustment function; and 5, performing turbulence simulation by using the reconstructed turbulence viscosity. According to the method, the self-adaptive sub-grid length scale of the shear layer is constructed and introduced into the initial region of the quasi-two-dimensional free shear layer, so that the sub-grid length scale of the initial region of the free shear layer is effectively reduced, and the problem that an existing RANS-LES hybrid model is highly dependent on grids is solved. The calculation accuracy is improved, meanwhile, the calculation consumption is greatly reduced, the turbulence simulation process is remarkably accelerated, and an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear flow in the complex engineering flow problem.

The invention discloses a ruler for measuring the length and the width of a corn, the ruler structurally comprises a measuring ruler, width scale marks, length scale marks and a bottom plate mechanism, the width scale marks are arranged on the front end face of the measuring ruler, the length scale marks are arranged on the front end face of the measuring ruler, and a width marking block moves leftwards on the front end face of a ruler plate; a magnetic plate can carry out positioning magnetic attraction on a transverse sliding rod, an LED lamp can carry out identification prompting on measured scales during measurement, the watching effect of the measured scales is improved, then width scale lines are measured through a measuring head on a movable block, the length and width of a corn can be measured by one person, and the measurement efficiency is improved. The four elastic bands independently carry out the firmness of automatic elastic clamping on the fingers of a measuring person, it is ensured that the fingers of the measuring person can be clamped between the plate body and the adjusting plate, and the measuring ruler is prevented from falling off or shifting from the hands of the measuring person when the corn is measured. And the effect of quickly and accurately measuring the length and width of the corn is improved.

The utility model discloses a drawing measuring scale for engineering cost. The drawing measuring scale comprises a length scale. According to the drawing measuring ruler for the construction cost, through the arrangement of the length ruler, the width ruler and the limiting mechanism, during measurement, equipment is placed at one corner of a drawing, so that the length ruler is aligned with the long edge of the drawing, the width ruler in the inner cavity of the length ruler is rotated, and an included angle of 90 degrees is formed between the width ruler and the bottom length ruler; at the moment, a limiting iron rod on a supporting plate on one side of the width ruler is loosened, the limiting iron rod returns to the initial position under the reverse acting force provided by a buffer spring on the surface, then the limiting iron rod is inserted into a limiting groove formed in the surface of the length ruler and is in magnetic connection with a magnetic block in the limiting groove, and limiting of the width ruler can be completed; the limiting iron rod is pulled outwards to be separated from the limiting groove, then the width ruler is rotated into the cavity to be stored, the length and the width of the drawing can be measured at the same time, and the measuring efficiency is improved.

The invention discloses a strong shear turbulence grid adaptive simulation method coupled with a k-epsilon series model. The method mainly comprises the following steps of: 1, judging whether a shielding function is applied or not; step 2, identifying a self-adaptive length scale of a shear layer; 3, constructing a scale-related adjustment function based on the turbulence energy spectrum integral; 4, reconstructing the turbulence viscosity of the k-epsilon series model by using an adjustment function; and 5, performing turbulence simulation by using the reconstructed turbulence viscosity. According to the method, the self-adaptive sub-grid length scale of the shear layer is constructed and introduced into the initial region of the quasi-two-dimensional free shear layer, so that the sub-grid length scale of the initial region of the free shear layer is effectively reduced, and the problem that an existing RANS-LES hybrid model is highly dependent on grids is solved. The calculation accuracy is improved, meanwhile, the calculation consumption is greatly reduced, the turbulence simulation process is remarkably accelerated, and an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear flow in the complex engineering flow problem.

The invention discloses a strong shear turbulence grid adaptive simulation method coupled with an SA series model. The method mainly comprises the following steps of: 1, judging whether a shielding function is applied or not; step 2, identifying a self-adaptive length scale of a shear layer; 3, constructing a scale-related adjustment function based on the turbulence energy spectrum integral; 4, reconstructing the turbulence viscosity of the SA series model by using an adjustment function; and 5, performing turbulence simulation by using the reconstructed turbulence viscosity. According to the method, the self-adaptive sub-grid length scale of the shear layer is constructed and introduced into the initial region of the quasi-two-dimensional free shear layer, so that the sub-grid length scale of the initial region of the free shear layer is effectively reduced, and the problem that an existing RANS-LES hybrid model is highly dependent on grids is solved. The calculation accuracy is improved, meanwhile, the calculation consumption is greatly reduced, the turbulence simulation process is remarkably accelerated, and an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear flow in the complex engineering flow problem.

This application relates to the field of data processing technology and discloses a method for processing heterogeneous multi-scale data in Gaussian process regression. The method first acquires the raw data and performs feature transformation, standardization, and dimensionality reduction preprocessing to construct a multi-level validation dataset. Second, it reconstructs the Gaussian process regression kernel function, introducing a learnable Minkowski distance parameter to replace the traditional fixed Euclidean distance metric. Next, it uses a tree-structured Parzen estimator strategy to perform global iterative optimization on the validation set with the goal of minimizing prediction error, determining the optimal Minkowski distance parameter. Subsequently, it trains the model based on the optimal parameter and an automatic correlation determination mechanism, jointly optimizing hyperparameters such as signal variance and length scale through maximum likelihood estimation. Finally, it performs prediction and outputs the mean and variance. This invention, through adaptive parameterization of the kernel function metric, effectively overcomes the shortcomings of traditional models in adapting to non-spherical distributions and multi-dimensional heterogeneous features, significantly improving prediction accuracy and generalization performance.

The invention relates to the technical field of hole site measuring tool equipment, and discloses a measuring device for a U-shaped shell. The measuring device comprises a plurality of groups of measuring units and a center distance measuring assembly. The measuring unit comprises a fixing assembly and a measuring assembly, wherein the fixing assembly comprises a claw which extends into and is fixed in a U shell punched hole; the knob assembly is in transmission connection with the claw to drive the claw to open and close; the shell assembly is provided with a sliding groove. The side surface measuring assembly comprises a distance measuring sensor and a blocking needle installed in the sliding groove. The distance measuring sensor is used for detecting the displacement amount of the blocking needle. The display device is used for displaying the displacement amount of the blocking needle. The center distance measuring assembly comprises a scale plate which is rotatably connected to a group of measuring units; the scale plate is rotationally connected to the other group of measuring units, the scale plate is in sliding connection with the scale plate, and the scale plate and the scale plate are correspondingly provided with length scales. By means of the arrangement, synchronous, rapid and direct measurement of the edge distance, the center distance and the included angle of the hole site is achieved, and the multi-dimensional size of the punching position is accurately obtained at the same time.

The invention discloses a strong shear turbulence dynamic grid adaptive simulation method coupled with a k-epsilon series model. The method mainly comprises the following steps of: 1, judging whether a shielding function is applied or not; step 2, calculating a Vman dynamic coefficient; step 3, identifying the self-adaptive length scale of the shear layer; step 4, constructing a scale-related adjustment function based on the turbulence energy spectrum integral; 5, reconstructing the turbulence viscosity of the k-epsilon series model by using an adjustment function; and 6, performing turbulence simulation by using the reconstructed turbulence viscosity. According to the method, the size of a local grid is identified by constructing a Vman dynamic coefficient, the length scale of the local grid is jointly determined in combination with the length scale of the shear layer adaptive sub-grid, and then the scale correlation function is constructed through the turbulence energy spectrum integral to reconstruct the turbulence viscosity, so that grid adaptive simulation is realized; an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear turbulence in a complex engineering flow problem.

The invention discloses a field portable accumulated snow parameter testing device and a testing method thereof, belongs to the technical field of accumulated snow parameter monitoring, and solves the problem that an existing accumulated snow parameter testing device is inconvenient to sample. The snow taking device comprises a snow taking pipe and an electronic scale. The snow taking pipe is of a transparent cylindrical structure with the hollow interior and two open ends, and length scales used for measuring the thickness of a snow sample and the equivalent depth of snow water and volume scales used for measuring the volume of the snow sample are arranged on the wall face of the snow taking pipe. An electric heating groove used for melting a snow sample in the snow taking pipe is formed in a shell of the electronic scale. Compared with a rain gauge with a snow melting function and an accumulated snow radar, the rain gauge has the advantages of being compact in structure and high in portability, and field flexible point selection sampling is supported. The snow taking pipe is combined with the electronic scale to weigh in real time and quickly calculate the density, and traditional snow sample transfer errors are eliminated; the electronic scale is integrated with the electric heating groove to achieve integration of snow melting and snow water equivalent measurement, switching of multiple devices is avoided, and the device is particularly suitable for rapid operation in complex terrains.

The invention discloses a strong shear turbulence dynamic grid adaptive simulation method coupled with an RSM series model. The method mainly comprises the following steps: step 1, judging whether a shielding function is applied or not; step 2, calculating a Vman dynamic coefficient; step 3, identifying the self-adaptive length scale of the shear layer; 4, constructing a scale-related adjustment function based on the turbulence energy spectrum integral coupling RSM series model; 5, reconstructing a Reynolds stress tensor and turbulence viscosity by using an adjustment function; and 6, performing turbulence simulation by using the reconstructed Reynolds stress tensor and turbulence viscosity. According to the method, the size of a local grid is identified by constructing a Vman dynamic coefficient, the length scale of the local grid is jointly determined in combination with the length scale of the shear layer adaptive sub-grid, and then the scale correlation function is constructed through the turbulence energy spectrum integral to reconstruct the turbulence viscosity, so that grid adaptive simulation is realized; an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear turbulence in a complex engineering flow problem.

The utility model discloses a size measuring device for furniture production, which comprises a horizontal ruler and a right-angle ruler arranged at the left end of the horizontal ruler, the right-angle ruler and the horizontal ruler are arranged at a right angle, a length scale line A is arranged at the left end of the right-angle ruler and located on the outer wall of the front end, and a length scale line B is arranged on the outer wall of the front end of the horizontal ruler. The novel auxiliary thickness measuring device is additionally arranged at the right end of the right-angle ruler of the size measuring device for furniture production, the outer wall of a wood board to be measured is accurately clamped through the fixed stop block and the movable stop block, the thickness of the wood board can be accurately measured, and compared with scale line measurement by only using the right-angle ruler or a horizontal ruler, measurement is more accurate. According to the auxiliary device, errors caused by non-professional measurement can be effectively reduced, the measurement precision is greatly improved, meanwhile, when the auxiliary device is used, tools do not need to be frequently replaced, the trouble of tool switching is avoided, the measurement efficiency is greatly improved, the measurement time is saved, furniture production size measurement is more convenient and efficient, and the production process is powerfully supported.

The utility model discloses a penis angle and length measuring device, which comprises a connecting part and two measuring rulers, and is characterized in that the measuring rulers are provided with length scales along the length direction and are provided with chutes along the length direction; the connecting part is in sliding connection with the sliding grooves of the two measuring rulers and can move in the length direction of the measuring rulers along the sliding grooves; the working axis of the connecting part is parallel to the depth direction of the sliding grooves, one of the sliding grooves can rotate around the working axis relative to the connecting part, the penis root and the penis head can be aligned through the structure, and measurement is more accurate.

The invention discloses a strong shear turbulence grid adaptive simulation method coupled with an RSM series model. The method mainly comprises the following steps of: 1, judging whether a shielding function is applied or not; step 2, identifying a self-adaptive length scale of a shear layer; 3, constructing a scale-related adjustment function based on the turbulence energy spectrum integral coupling RSM series model; 4, reconstructing a Reynolds stress tensor and turbulence viscosity by using an adjustment function; and 5, performing turbulence simulation by using the reconstructed Reynolds stress tensor and turbulence viscosity. According to the method, the self-adaptive sub-grid length scale of the shear layer is constructed and introduced into the initial region of the quasi-two-dimensional free shear layer, so that the sub-grid length scale of the initial region of the free shear layer is effectively reduced, and the problem that an existing RANS-LES hybrid model is highly dependent on grids is solved. The calculation accuracy is effectively improved, the calculation consumption is reduced, the turbulence simulation process is remarkably accelerated, and an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear flow in complex engineering flow.

The present application relates to the technical field of measurement of the geometric center of continuous casting round billets, and particularly relates to a kind of measurement method and measuring tool of the geometric center of continuous casting round billets, including measuring rope and fixing device, the surface of the measuring rope is provided with length scale, fixing device is used to fix measuring rope and can be adsorbed to the end face of continuous casting round billet, fixing device includes fixing piece, locking bolt and magnetic attraction piece, the inside of fixing piece is provided with cavity, and connection hole is opened on outer wall, locking bolt is fixed to the upper end of fixing piece, the end of measuring rope passes through connection hole, magnetic attraction piece is fixedly arranged in cavity, and the lower end of locking bolt is in abutment with magnetic attraction piece.The present application determines the center by identifying the key feature points of flat area on the contour and using the method of intersection of multiple median lines, effectively averages the error caused by local contour deformation, and the obtained center point can better represent the geometric center of the entire section under the influence of deformation, and the result is stable and accurate.

The invention discloses a strong shear turbulence grid adaptive simulation method coupled with a v2-f series model. The method mainly comprises the following steps of: 1, judging whether a shielding function is applied or not; step 2, identifying a self-adaptive length scale of a shear layer; 3, constructing a scale-related adjustment function based on the turbulence energy spectrum integral; 4, using an adjustment function to reconstruct the turbulence viscosity of the v2-f series model; and 5, performing turbulence simulation by using the reconstructed turbulence viscosity. According to the method, the self-adaptive sub-grid length scale of the shear layer is constructed and introduced into the initial region of the quasi-two-dimensional free shear layer, so that the sub-grid length scale of the initial region of the free shear layer is effectively reduced, and the problem that an existing RANS-LES hybrid model is highly dependent on grids is solved. The calculation accuracy is improved, meanwhile, the calculation consumption is greatly reduced, the turbulence simulation process is remarkably accelerated, and an effective numerical simulation method is provided for solving low-consumption and high-precision simulation of strong shear flow in the complex engineering flow problem.

The invention discloses a gaseous ecological network diffusion coefficient optimization method and system, and relates to the technical field of fluid mechanics, and the method comprises the steps: S1, constructing an early warning model; s2, acquiring data information in real time; s3, the turbulence suppression module performs turbulence suppression processing by using the data information; s4, analyzing the flux, and triggering an alarm according to the flux and the current Reynolds number; s5, optimizing a critical Reynolds number Recritnew and a damping length scale by using a loss function, and updating a diffusion coefficient; s6, the steps S2-S5 are cyclically repeated; a diffusion coefficient is updated through a fluid mechanics regularization theory, a'turbulence suppression-biological damping-network feedback 'ternary coupling mechanism is established, and accurate diffusion simulation and dynamic early warning under a high Reynolds number working condition are realized.