40results about How to "Well considered" patented technology

Based on the method of extracting the height information of urban buildings based on the shadows of multi-temporal remote sensing images, the present invention aims to form a systematic, fast and accurate method, using two remote sensing images of different time phases (the two images have different sun elevation angles and satellite azimuths) Angle), to analyze and calculate the shadow of the target building in batches, and then realize the rapid and accurate extraction of the height of the target building in the area, which will help to improve the efficiency of measurement, 3D modeling and other work; the specific implementation is mainly through calculation The length of the building shadow, combined with the angle relationship between the landmark building and its shadow on the image, selects the corresponding mathematical model to calculate the height value of the target building in the area; the two sets of building height results calculated by using two remote sensing images are used to construct a simulation model based on the least squares method. Combine the equations to obtain the corrected height of the target building, thereby improving the accuracy of the calculation results.

The invention relates to a heat dissipation method based on a slotless box cable tunnel thermal field model. The method includes the following steps of (1) exploring a cable tunnel to obtain parameters of all components of the cable tunnel, (2) building a mathematical model of a cable tunnel thermal field, (3) working out the calorific value of the cable tunnel according to the mathematical model and (4) designing the ventilation mode and the ventilation system of the electric power tunnel. Compared with the prior art, the heat dissipation method has the advantages of being effective and accurate.

The invention provides a gas well re-fracturing well selection and layer selection method. The gas well re-fracturing well selection and layer selection method comprises the following steps: (1) calculating a porous elastic stress steering coefficient Piporo; (2) taking a well selected according to step (1) as an alternative target well for repeated fracturing, calculating the deflation volume Vdof the target well; (3) calculating the instantaneous recovery percent IRR; (4) calculating the yield decreasing coefficient Di by taking the well selected according to step (3) as an alternative target well for repeated fracturing; (5) calculating a gas reservoir attenuation coefficient RDep by taking the well selected according to step (4) as an alternative target well for repeated fracturing; (6) calculating each single-layer reserve abundance omegai of the target well, and selecting a layer with the air layer reserve abundance greater than 0.2 as an alternative air layer for repeated fracturing. According to the gas well re-fracturing well selection and layer selection method, a judgment algorithm is determined by application of mathematical statistics and the dynamic analysis of the gas reservoir engineering, and the calculation is simple. In the method, factors affecting the repeated fracturing are considered comprehensively, the repeated fracturing well and layer are optimized,the implementation accuracy is high, the method has high transplantability, and the application is wide.

The invention provides a control method for a four-wheel-driven hybrid electric vehicle. The control method comprises the first step of detecting ignition key signals, torque required by the vehicle, the charge state of a power battery and vehicle speed signals, and the second step of controlling the vehicle to switch between multiple working modes according to the ignition key signals, the torque required by the vehicle, the charge state of the power battery and the vehicle speed signals. According to the control method, the multiple working modes are adopted, and the advantages of four-wheel-driven hybrid power can be given to full play. Through switching between the multiple working modes, the vehicle can be in an optimal working state all the time, so that fuel consumption is lowered. In addition, through distribution of the torque of all components in different working modes, the working efficiency of an engine, an ISG motor and a rear axle motor can be optimized, so that the fuel consumption of the whole vehicle is further lowered.

The invention provides a bus priority control method for avoiding bus clustering. The bus priority control method for avoiding bus clustering includes the steps that whether a bus will run into bus clustering or not after bus priority is given to the bus and the bus passes preferentially is judged; if the bus will run into bus clustering, priority control is not conducted on the bus; if the bus will not run into bus clustering, whether buses entering a bus station run into bus clustering or not under normal green lights in all directions and positions in front of the bus is judged sequentially, if bus clustering does not happen, priority control is conducted, and if bus clustering happens, priority control is not conduced. Through the scheme, bus priority control is associated with bus clustering, whether bus clustering will happen or not if priority control is conducted is considered when a bus priority control strategy is formulated, and thus the problems that in the prior art, when buses take the priority to pass through without limitations, clustering will happen to a bus station, passage of social vehicles is influenced, and traffic jams are caused are effectively avoided.

The invention belongs to the technical field of inertial navigation and relates to a ground-based simulation test method for the automatic navigation function of an inertial navigation system. The ground-based simulation test method is free of the involvement of a flight control system and has low requirements for a turntable; a dual-axis hand-operated turntable is employed in stead of a three-axis hydraulic automatic turntable, and mutual cross-linking is reduced; besides, instruments such as an angular rate gyroscope and the like are reduced; the section of air routes covers all possible flight modes; people and devices joining in the test are few, so that the test is easy to organize and implement; the test is short in period and low in cost; and the method is simple and practicable.

The present invention relates to an energy consumption evaluation and optimization method of an extended discontinuous reception mechanism (eDRX). It belongs to the field of narrowband Internet of Things. The present invention includes the following steps: S1: when the terminal adopts the extended discontinuous reception mechanism (eDRX), establishes a Markov model with the terminal working state as a state variable; S2: when the terminal has data to transmit, it tries to randomly access the network; S3: When the random access of the terminal fails, the terminal needs to perform a backoff process, and the backoff value is determined by the number of re-access times and the initial backoff value; S4: When the backoff value increases linearly as mentioned above, the above energy evaluation model is used for verification. The invention can effectively and comprehensively evaluate the energy consumption of the terminal, effectively reduce the energy consumption of the terminal, improve the utilization rate of battery energy, and finally improve the life of the terminal.