Improved physical method for topographic correction of remote sensing images

The invention relates to an improved physical method for topographic correction of remote sensing images, which considers the influence of the topography on incident irradiance and earth surface reflectivity received by the sloping surface, more accurately computes sky radiation received by the sloping surface pixel, and meanwhile considers the influence of atmosphere during the topographic correction. The method of the invention can obtain the better result of the topographic correction; and the method belongs to the physical method, has universality and can be applied to various optical remote sensing images.

Method for preparing 2, 5-dibromo-benzene acetic acid

The invention belongs to the technical field of organic chemistry and particularly discloses a method for preparing 2, 5-dibromo-benzene acetic acid. The preparation method comprises the following steps: taking 5-bromoisatin (formula I) as a starting raw material and performing reduction reaction to obtain the bromo-indolone (formula II) and performing diazotized bromization on the bromo-indolone (formula II) to obtain the 2, 5-dibromo-benzene acetic acid (formula III), wherein the reaction process is as follows: FORMULA. By taking the 5-bromoisatin as the starting raw material, the method has the advantages that the 5-bromoisatin is a large-scale produced chemical product with sufficient market supply and low cost.

Preparation method of 1-(6-methyl pyridine-3-yl)-2-(4-methylsulfonyl phenyl) ethanone

The invention belongs to the technical field of preparation of fine chemical products such as medicines, and particularly relates to a preparation method of 1-(6-methyl pyridine-3-yl)-2-(4-methylsulfonyl phenyl) ethanone. The preparation method of 1-(6-methyl pyridine-3-yl)-2-(4-methylsulfonyl phenyl) ethanone comprises the following steps: by taking methyl p-sulfone benzyl halide (formula II) as a raw material, carrying out reaction on the halide and activated zinc powder to prepare a zinc agent (formula III); then carrying out condensation reaction on the zinc agent and 6-methyl nicotinoyl chloride under the action of a metal catalyst; and re-crystallizing to obtain a target product (formula I), wherein the reaction formula is shown in description. The preparation method provided by the invention is short in synthetic process route and simple to operate, the raw material is relatively low in cost, and the refined product is high in purity; and the purity detected by HPLC is greater than ...

Practical leaf area index remote sensing inversion method

The invention discloses a practical leaf area index remote sensing inversion method. According to the method, a lookup table is built in a simulation manner on the base of a geometrical optics model, then, an LAI inversion model is built, a variable end element spectral mixing model is used in cooperation, and finally, the LAI inversion result is obtained. The practical leaf area index remote sensing inversion method is completely based on remote sensing images, no field measured LAI data are needed, and therefore, the LAI inversion cost is reduced; calculation is easy and convenient, and the method is a practical LAI remote sensing inversion method.

Interaction method and device, equipment and storage medium

The embodiment of the invention discloses an interaction method and device, equipment and a storage medium. When it is detected that the first user enters the virtual room, displaying a shooting task list in the virtual room; wherein the shooting task list comprises a plurality of shooting tasks, and each shooting task carries task information; for each shooting task, obtaining an image shot by the first user according to the task information; performing feature extraction on the image to obtain feature information; and comparing the feature information with the task information, and if the feature information is matched with the task information, completing the shooting task. According to the interaction method provided by the embodiment of the invention, the task information is associated with the offline, and the shooting task is completed by comparing the feature information of the offline shot image with the online task information, so that the interaction between the terminal equipment ...

L<1> norm constraint based parameter solution and all-parameter optimization methods for rational function model

Disclosed are L<1> norm constraint based parameter solution and all-parameter optimization methods for a rational function model. In a terrain-independent scheme, when a satellite image has large internal distortion, reliable parameters of the rational function model can still be obtained; in a terrain-dependent scheme, 78 rational function model coefficients can be solved with fewer than 39 control points. Under the condition of known rational function model coefficients, the rational function model is subjected to all-parameter optimization with few ground control points. The L<1> norm constraint based parameter solution and all-parameter optimization methods for the rational function model have the advantages that stability of parameter solution for the rational function model is improved, fewer control points are required, reliable solutions for the parameters of the rational function model can be obtained with fewer than 39 control points, and precision of fine image correction is ...

Method for calculating observation zenith angle and azimuth angle of pixel of satellite image

The invention relates to a method for calculating an observation zenith angle and an azimuth angle of a pixel of a satellite image. According to the method, the observation zenith angle and azimuth angle of each pixel in the satellite image can be calculated only if an imaging model (which can be a strict imaging model or a general three-dimensional imaging model such as a rational function model) of the satellite image is known, and an observing angle of each pixel can be transformed when the image is subjected to geometric transformations such as geometric correction and reprojection, so that the information loss of the observing angle of the image caused by the geometric transformations can be avoided.

Automatic intelligent method for detecting insufficiently-segmented regions of high-resolution remote sensing image

The invention relates to a practical method for detecting insufficiently-segmented regions of a remote sensing image, which mainly comprises the following steps: in the first step, determining the dot array in the feature space; in the second and the third steps, respectively supposing that the region is a single ground object or mixed ground object, calculating the center and the distribution parameters of the dot array; and in the fifth step, judging whether the segmented region is an insufficiently-segmented region according to the quantified difference between the actual distribution obtained in the fourth step and the ideal distribution. The invention can judge whether each region after image segmentation is an insufficiently-segmented region, thereby automatically marking the insufficiently-segmented region and being used for the subsequent region resegmentation. Thus, the invention enhances the precision of image segmentation and image classification. The invention can be widely ...

Preparation method for (2'R)-2'-deoxy-2'-fluoro-2'-methyluridine

The invention belongs to the technical field of organic chemistry, and relates to a preparation method for (2'R)-2'-deoxy-2'-fluoro-2'-methyluridine. The preparation method for (2'R)-2'-deoxy-2'-fluoro-2'-methyluridine comprises the steps: with a protective fluororibose (represented by the formula I) as a starting material, carrying out a condensation reaction with a raw material ditrimethylsiyl protective uracil (represented by the formula VI) to obtain dibenzoyl uridine (represented by the formula IV), de-protecting dibenzoyl uridine to obtain the target product uridine (represented by the formula V), wherein a reaction equation is described in the specification. Compared with the prior art, the method reduces one reaction step in synthesis steps firstly, improves the production efficiency in the large-scale production, reduces the workload, reduces energy consumption and three-waste emission load, and improves the total yield of preparing the compound represented by the formula V from ...

Practical atmospheric correction method for remote sensing images

The invention discloses a practical atmospheric correction method for remote sensing images, which comprises three steps: a first step, inverting the optical thickness of atmospheric aerosol from MODIS data by means of a 6S model lookup table based on a dense vegetation algorithm; a second step, calculating total content of atmospheric vapor by using an MODIS data band ratio method, and then calculating the optical thickness of the atmospheric vapor; and a third step, combining the inverted optical thickness of the atmospheric aerosol, the optical thickness of the atmospheric vapor and a DOS model to invert the earth surface reflectance. The calculated earth surface reflectance has high precision; the method has strong practicability, and is applicable to various land satellite images; and the MODIS data can be acquired freely every day; therefore, the method can be used as a service atmospheric correction method for the remote sensing images.

Automatic and moderate orthographic projection correction method of satellite remote sensing image

The invention provides an automatic and moderate orthographic projection correction method of a satellite remote sensing image. The method is formed by the organic combination of control point automatic match, control point automatic optimization, control point gross error automatic detection, correction model moderate solving and the like. The method solves the problem that the control points inthe control point automatic selection are not uniformly distributed and the problems of detecting control point observed value gross error and improving model solving precision. As the method has theadvantages of moderation, precision and high degree of automation, the method is suitable for the production of orthographic projection correction products of the satellite remote sensing image on a large scale.

Iron tower tower material shield jig

The utility model belongs to cable installation device field, concretely relates to iron tower tower material shield jig, including outside equilateral triangle steel, inside equilateral triangle steel, an inside equilateral triangle steel outside welding connector plates, last U type connector and the welding strengthening muscle of being equipped with of connector plates, the design of concave arc structure is adopted to inside equilateral triangle steel apex angle position, and outside equilateral triangle steel and inside equilateral triangle steel adopt the bolt -up. The utility model discloses practice thrift the cost of labor, reduce the multiplexer utensil and use quantity, effectual assurance assemblage iron tower construction progress. It is easy and simple to handle, improved work efficiency, guaranteed the construction process of iron tower. The shield jig not only is used for organizing the ta shinei connection of acting as go -between, also can be used to hoisting point wire ...

Automatic intelligent method for detecting insufficiently-segmented regions of high-resolution remote sensing image

The invention relates to a practical method for detecting insufficiently-segmented regions of a remote sensing image, which mainly comprises the following steps: in the first step, determining the dot array in the feature space; in the second and the third steps, respectively supposing that the region is a single ground object or mixed ground object, calculating the center and the distribution parameters of the dot array; and in the fifth step, judging whether the segmented region is an insufficiently-segmented region according to the quantified difference between the actual distribution obtained in the fourth step and the ideal distribution. The invention can judge whether each region after image segmentation is an insufficiently-segmented region, thereby automatically marking the insufficiently-segmented region and being used for the subsequent region resegmentation. Thus, the invention enhances the precision of image segmentation and image classification. The invention can be widely ...

Technique for acquiring surface reflectance by coupling satellite remote-sensing image atmospheric correction and topographical correction processes

A technique for acquiring surface reflectance by coupling atmospheric correction and topographical correction processes by satellite remote-sensing images is characterized in that the remote-sensing image atmospheric correction and topographical correction processes are organically combined to allow effective inversion of satellite remote-sensing image surface reflectance. The technique which is a physical mechanism and mechanical method based on remote-sensing image atmospheric correction and topographical correction is universal.

Intelligent method for classifying high-resolution remote sensing images

In view of the characteristics of the high-resolution remote sensing images, the invention provides a practical intelligent method for classifying images, which comprises the following six steps: generating the image segmentation result of a full-color image; acquiring the segmentation result of a multispectral image by utilizing space mapping; determining whether the segmented regions of the full-colour image are insufficiently segmented; resegmenting the detected insufficiently-segmented region; generating the regional feature space; and classifying the image by using a classifier. The invention solves the problem that the insufficiently-segmented regions frequently influence the image classification precision in the image classification process. The method is suitable for high-resolution images from remote sensing satellites, such as IKONOS, QUICKBID and the like, and plays an important role in extracting application messages, such as target identification, resource environment survey ...

Practical atmospheric correction method for remote sensing images

The invention discloses a practical atmospheric correction method for remote sensing images, which comprises three steps: a first step, inverting the optical thickness of atmospheric aerosol from MODIS data by means of a 6S model lookup table based on a dense vegetation algorithm; a second step, calculating total content of atmospheric vapor by using an MODIS data band ratio method, and then calculating the optical thickness of the atmospheric vapor; and a third step, combining the inverted optical thickness of the atmospheric aerosol, the optical thickness of the atmospheric vapor and a DOS model to invert the earth surface reflectance. The calculated earth surface reflectance has high precision; the method has strong practicability, and is applicable to various land satellite images; and the MODIS data can be acquired freely every day; therefore, the method can be used as a service atmospheric correction method for the remote sensing images.

Detachable built-in electromagnet driven type vacuum switch

A vacuum switch for frequent control of high-voltage and high-current circuit is composed of an insulating tube, two insulating covers, two conducting end covers, two sealing rubber rings and a sealed joint assemblage for vacuumizing, and a vacuum tube, in which screw connection is used and which can be assembled, disassembled and vacuumized repeatedly. The moving and fixed contacts and electromagnet to drive moving contact are installed in the vacuum tube. The moving and fixed contacts have respectively convex and concave spherical surfaces. An electric arc sucking coil outside the vacuum tube and a multihole arc extinguish chamber around the moving contact constitute an arc suppressing unit. Its advantages are simple structure, small size, low cost and long service life.

Physical method for computing atmospheric path radiance of satellite remote sensing images through picture elements one by one

A dark object method is mainly utilized when path radiance of satellite remote sensing images is computed traditionally. However, the dark object method is an empirical method; by means of the dark object method, the whole scene of images has one path radiance value only, and the error is big. Therefore, the invention provides a physical method for computing the atmospheric path radiance of the satellite remote sensing images through picture elements one by one. The physical method is based on the remote sensing images completely, and no auxiliary data is needed. Accordingly, the physical method is strong in universality, and a new method is provided for computation of a large area of atmospheric path radiance.

Automatic and moderate orthographic projection correction method of satellite remote sensing image

The invention provides an automatic and moderate orthographic projection correction method of a satellite remote sensing image. The method is formed by the organic combination of control point automatic match, control point automatic optimization, control point gross error automatic detection, correction model moderate solving and the like. The method solves the problem that the control points in the control point automatic selection are not uniformly distributed and the problems of detecting control point observed value gross error and improving model solving precision. As the method has the advantages of moderation, precision and high degree of automation, the method is suitable for the production of orthographic projection correction products of the satellite remote sensing image on a large scale.

Adjustable iron tower basis protective film utensil

The utility model belongs to a special basic protective equipment of circuit iron tower, concretely relates to adjustable iron tower basis protective film utensil, including two daughter boards and two mother boards, the mother board includes L shape starting stave and the first flat board of L shape that the size suited, L shape starting stave one side and the first dull and stereotyped one side fixed connection of L shape, the first dull and stereotyped opposite side fixed connection L of L shape spout, the daughter board includes L shape second riser and L shape second flat board that the size suited, L shape second riser one side and L shape second flat board one side fixed connection, daughter board size are lighter than the mother board size, and mother board both ends are respectively through two daughter boards of L shape spout concatenation, and another mother board both ends through two daughter boards of L shape spout concatenation remaining one end separately, form closed rectangle ...

Torpedo tank car wheel bearing pressure oiling equipment

The utility model discloses a torpedo tank car wheel bearing pressure oiling equipment, including the movable dolly, be equipped with hydraulic power unit, power cylinder, oiling mechanism on the dolly, hydraulic power unit, power cylinder, the fixed connection of oiling mechanism on the dolly, oiling mechanism and power cylinder are connected, and power cylinder and hydraulic power unit are connected, power cylinder includes the hydro -cylinder body no. 1, piston no. 1, piston rod, piston no. 1 and the cooperation of the hydro -cylinder body, and piston no. 1 is connected with the piston rod, oiling mechanism is connected with the piston rod, oiling mechanism pass through the pipeline with the bearing cover that needs filling lubricating oil on the oil inlet be connected, hydraulic power unit is connected with the controller. The utility model discloses lie in the transprotable dolly, be convenient for dismouting and maintenance, it is nimble convenient to use, need not axle that the dismouting ...

Populus euphratica single tree crown segmentation method, device and equipment based on aerial image

The invention relates to the intelligent mining direction of remote sensing data, in particular to a populus euphratica single tree crown segmentation method, device and equipment based on aerial images. The method comprises the following steps: acquiring a first multispectral unmanned aerial vehicle aerial image, and preprocessing the first multispectral unmanned aerial vehicle aerial image; inputting the first multispectral unmanned aerial vehicle aerial image into a tree crown identification model based on a D-LinkNet network to obtain a populus euphratica crown seed point diagram; calculating by using the populus euphratica crown seed point diagram and a first wave band of the first multispectral unmanned aerial vehicle aerial image as input by using a watershed segmentation algorithm based on mark control, and segmenting a populus euphratica single tree crown by using the first multispectral unmanned aerial vehicle aerial image; wherein the first wave band is an infrared wave band ...

Torpedo tanker wheel bearing pressure oil injection equipment

The invention discloses a torpedo tanker wheel bearing pressure oil injection equipment which comprises a movable trolley. A hydraulic pump station, a power oil cylinder and an oil injection mechanism are arranged on the trolley and fixedly connected on the same, the oil injection mechanism is connected with the power oil cylinder which is connected with the hydraulic pump station, the power oil cylinder comprises a first oil cylinder body, a first piston and a piston rod, the first piston is matched with the first oil cylinder body and connected with the piston rod, the oil injection mechanism is connected with the piston rod, the oil injection mechanism is connected with an oil inlet on a bearing gland where lubricating oil needs to be filled through a pipeline, and the hydraulic pump station is connected with a controller. The equipment is positioned on the movable trolley, and is convenient to demount, mount and maintain and flexible and convenient to use, and lubricating and maintaining ...

Detachable built-in electromagnetic driven type vacuum switch

Wide-viewshed satellite image surface reflectance retrieval method

A sun shining zenith angle and a satellite observing zenith angle are very important input parameters in the satellite remote sensing image atmospheric correction and the surface reflectance retrieval. Aiming at an image with a bigger viewshed angle, the sun shining zenith angle and the satellite observing zenith angle are calculated pixel by pixel, the retrieval is carried out on the surface reflectance, and the wide-viewshed land satellite remote sensing image surface reflectance obtaining method is provided.

Landsat 8 satellite data land surface temperature inversion method

A Landsat 8 satellite data land surface temperature inversion method. The method is completely based on Landsat 8 data and does not need any external data source, thereby overcomes the limitation that conventional Landsat data land surface temperature inversion must rely on an external data source, and the method provided by the invention is of great practical significance to realization of using Landsat 8 data to produce land surface temperature products in an operational manner.