6results about How to "Estimate method is simple" patented technology

A method and apparatus for inserting a pseudo sequence during data modulation in a communication system according to a channel state and a link state, etc. are disclosed. In an embodiment, a method for data modulation by a wireless communication node of a wireless communication system includes: inserting at least one first pseudo sequence into a first data sequence in a first data block; and inserting at least one second pseudo sequence into a second data sequence in a second data block; wherein a first length of the first pseudo sequence is different from a second length of the second pseudo sequence, and wherein the second pseudo sequence includes the first pseudo sequence or is included in the first pseudo sequence.

The invention discloses a method for estimating mechanical impedance of a vibration isolator, which relates to the technical field of vibration isolation, and comprises the following steps of: directly giving equivalent parameters of a typical vibration isolator and a calculation formula of the equivalent parameters of vibration isolators except the typical vibration isolator; the equivalent parameters of the target vibration isolator to be estimated can be directly inquired and determined when the target vibration isolator to be estimated belongs to a typical vibration isolator, and the equivalent parameters of the target vibration isolator to be estimated can be calculated according to the rated load and the static stiffness when the target vibration isolator to be estimated does not belong to the typical vibration isolator. And then the input impedance and the transfer impedance of the target vibration isolator can be estimated by using the equivalent parameters through a fitting formula, and the estimation method is simple in implementation mode, good in matching with test results, high in estimation precision, free of limitation of vibration isolator types, wide in application range and capable of providing key input data for vibration evaluation of the vibration isolation system. The method is suitable for calculation and evaluation in the vibration isolation system design stage.

The present invention discloses a method for calculating the emergency anchor dragging braking distance of a ship, including: establishing a ship deceleration motion equation according to the water resistance acting on the hull, the dynamic grip of the anchor during braking, and Newton's second law; obtaining the longitudinal additional mass empirical value of the moving ship, and obtaining the water resistance coefficient relationship formula based on it; fitting the corresponding anchor dynamic grip coefficient under the ratio of different chain lengths to anchoring depths, and obtaining the dynamic grip function of ordinary stockless anchors and large grip anchors; substituting the obtained water resistance coefficient relationship formula and the anchor dynamic grip function into the ship deceleration motion equation, and obtaining the estimation formula of the dragging single anchor braking distance of ordinary stockless anchor ships and the estimation formula of the dragging single anchor braking distance of large grip anchor ships. The calculation method of the present application takes into account the influence of physical parameters such as ship additional mass and water resistance on the dragging anchor braking distance, and is more scientific and reasonable compared with the existing dragging anchor braking distance estimation formula, and has a wider applicable ship speed range and more reliable calculation results.

This invention relates to the field of automotive control methods, specifically to a method for estimating the driving range of a pure electric vehicle. The method comprises the following steps: S1, obtaining the real-time power consumption and remaining battery power of the vehicle's auxiliary components; S2, dividing the vehicle's historical mileage into short and long mileage segments according to a set distance, and calculating the average motor power consumption for the short and long mileage segments respectively; S3, calculating the current average motor power consumption based on the average motor power consumption for the short and long mileage segments and their respective weighting coefficients; S4, calculating the remaining driving range of the electric vehicle based on the current average motor power consumption, remaining battery power, and real-time power consumption of the auxiliary components. The method for estimating the driving range of a pure electric vehicle in this application is simple. By distinguishing between short and long mileage segments and calculating the average motor power consumption for each segment, the final driving range is calculated. This method considers the power consumption characteristics of the motor under different mileage segments, resulting in a more accurate calculation.

The invention relates to the technical field of rock mass structure prediction methods, in particular to a rock mass fracture parameter estimation method and system. The method includes: acquiring a rock fracture image; preprocessing the rock mass fracture image to obtain a preprocessed image; the preprocessed image is analyzed and calculated to obtain a dominant fracture density range and a fracture density range in any direction, and Monte Carlo simulation is adopted to analyze the dominant fracture density range and the fracture density range in any direction so as to estimate the density of rock mass fractures; normal distribution and logarithmic normal distribution fitting are carried out on the preprocessed image, and the inclination angle of the rock mass fracture is estimated based on the projection angle; and counting the fracture length of each group of fractures in the preprocessed image, and estimating the length of the rock mass fractures in the group based on the fractures with the fracture length greater than a set threshold value. The rock mass fracture image is analyzed based on the geometrical characteristics and the distribution rule of the fractures, and the density, the inclination angle and the length of the rock mass fractures can be accurately estimated.

The invention discloses a debris flow scale estimation method. The method comprises the following steps: acquiring related information of a drainage basin to be estimated; printing to obtain a 3D printing model of the drainage basin to be estimated; a blank slope body on the 3D printing model is scanned to obtain a three-dimensional point cloud, and the three-dimensional point cloud is converted into an original terrain where no material source is laid; laying a corresponding soil body on the 3D printing model to simulate an object source condition; early-stage precipitation is conducted on the 3D printing model after the corresponding soil body is laid, and the precipitation amount is recorded till the natural water content is achieved; a real precipitation process is simulated on the 3D printing model; the total amount of solid substances of the simulated debris flow is obtained, and a DEM after the disaster is obtained through scanning; and amplifying the total amount of debris flow solid substances according to the cubic of x to serve as a lower limit value, subtracting the DEM after the disaster from the DEM before the disaster according to the cubic of x to serve as an upper limit value, and obtaining an estimated debris flow scale. According to the method, the whole process from rainfall to debris flow rushing out is simulated on the terrain closer to the reality, and the accuracy of the estimation result is improved.