35results about How to "Method steps are clear" patented technology

The invention discloses a remote sensing satellite imaging task autonomous aggregation method which comprises steps of firstly, identifying the task density degree in a local planning window range, judging whether the candidate to-be-observed task set needs autonomous aggregation of remote sensing satellite imaging tasks or not; when the autonomous aggregation is needed, dividing the candidate to-be-observed task set to obtain a plurality of dense task subsets; then, calculating external polygons of the dense task subsets respectively; determining a task aggregation mode of the dense task subsets according to the external polygons of the dense task subsets; dividing each dense task subset into a plurality of strip observation subtask sets and a region observation subtask set; and finally,generating a plurality of strip observation aggregation tasks according to the plurality of strip observation sub-task sets, performing push-broom strip division, generating a region observation aggregation task according to the plurality of region observation sub-task sets, and performing push-broom strip division to complete autonomous aggregation of the remote sensing satellite imaging task.

The invention relates to the technical field of power semiconductor devices, discloses a structure optimization design method for a TO package power semiconductor device, and aims to provide a practical design tool for the structure optimization of a TO package power semiconductor device. This method first defines the optimization objectives, design variables and constraints of the power semiconductor device to be optimized; secondly, a finite element analysis model is established to analyze the thermal stress and warpage of the chip in the device; thirdly, combined with response surface technology, two The structure optimization model optimizes the chip structure size and position size in turn. Compared with the existing technology, this method sequentially optimizes the chip structure size and position size, which can minimize the chip warpage and meet the constraints of thermal stress and chip area; the steps are clear and easy to understand, and can be directly used to solve the power consumption of general TO packages. The structural design of semiconductor devices has good ease of use and applicability.

The invention discloses a detection method of the relevancy between rustiness of a stainless steel coil and ignition of a PVC material. The method comprises the following steps: 1) detecting the environment between a fire scene and a stainless steel coil storage scene, and judging whether fire combustion residue can float to the stainless steel coil; 2) opening the stainless steel coil, and detecting whether the rust degrees of the inner coil and the outer coil of the stainless steel coil are the same; 3) observing the rust trace on the surface of the stainless steel coil, and observing whether an adhered foreign matter exists on the surface; 4) performing element detection on the rust surface of the stainless steel coil, and determining whether chlorine element exists in a rust spot; 5) determining the fact that rust of the stainless steel coil is related to the ignition of the PVC material when the chlorine element exists in the rust spot, and determining the fact that rust of the stainless steel coil is not related to the ignition of the PVC material when the chlorine element does not exist in the rust spot. The method is simple in operation and reliable in results, and can rapidly obtain a conclusion whether rust of the stainless steel coil is related to a PVC fire.

The invention belongs to the field of optical precision testing and specifically relates to an aspheric surface parameter determining method in tilted-wave interferometer. The method includes steps of1, according to a given aspheric equation and diameter, dividing an aspheric surface evenly according to an angle; setting the center of incoming spherical waves and calculating mirror points of thecenter of the spherical wave relative to each node by utilizing a formula; emitting light to corresponding node coordinate positions from the mirror points so as to form a reflection wave face, judging a distribution range of measurable interference fringes according to the phase difference distribution between the calculated reflection wave face and reference spherical waves, moving the positionof the center of the spherical waves, repeating the above process until the whole aspheric surface can be measured; therefore, positions of all the spherical wave sources are determined and design ofa point source array is implemented. The method is clear in steps, accurate in calculation and wide in application range; by using a computer program, design can be made quickly; approximate evaluation is not needed during the calculation process and the calculation result is accurate.

The invention provides a method and system for photoelectric ranging meteorological correction. An unmanned aerial vehicle and a corresponding ground control module are arranged, and wireless communication of a ground control system and the unmanned aerial vehicle is established; a communication module, a GNSS module, a temperature sensor, a barometric sensor, a humidity sensor and a storage module are arranged on the unmanned aerial vehicle in a carrying mode; the unmanned aerial vehicle flies back and forth along a designed air route, a photoelectric ranging instrument performs repeated ranging on a target point many times in the period, and meteorological elements on a ranging signal transmission route are measured while ranging is performed; the average value of temperature, barometric pressure, humidity and distance is solved, and meteorological correction is achieved. The system is simple in structure, and labor division of modules is clear, steps of the method are clear, and the scheme can be achieved easily. By means of the method and system, the meteorological elements on the ranging signal transmission route can be accurately measured, meteorological element representativeness in the prior art can be greatly reduced, and therefore photoelectric ranging precision is improved, and a reliable guarantee is provided for high-precision measurement.