WO2021081795A1

WO2021081795A1 - Method and apparatus for assessing impact range of typhoon, terminal device and storage medium

Info

Publication number: WO2021081795A1
Application number: PCT/CN2019/114301
Authority: WO
Inventors: 李晴岚; 黄典; 刘炳荣; 李广鑫
Original assignee: 中国科学院深圳先进技术研究院
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2021-05-06

Abstract

A method and apparatus for assessing the impact range of a typhoon, a terminal device and a storage medium. The method comprises: acquiring coastline positions, a typhoon landing position, the positions of a preset number of observation sites, and wind speeds at the observation sites that are in one-to-one correspondence with the observation sites (S101); establishing a coordinate system using the typhoon landing position as a coordinate origin (S102); dividing the coordinate system into several regions according to a preset division rule (S103); dividing the observation sites into several levels according to the wind speeds at the observation sites (S104); selecting the furthest main impacted site according to a preset selection rule, and using the furthest main impacted site as a fitting site of a corresponding level in a corresponding region (S105); and according to the position of the fitting site, fitting a boundary curve of the impact range of all levels of gales caused by typhoons (S106). According to the boundary curve, the impact range of a typhoon may be obtained, thereby providing a reference for typhoon prediction.

Description

Evaluation method, device, terminal equipment and storage medium of typhoon impact area

Technical field

This application belongs to the field of big data technology, and in particular relates to methods, devices, terminal equipment, and storage media for evaluating the scope of typhoon impact.

Background technique

Research on the impact of typhoons plays an important role in typhoon forecasting. Most of the existing technologies implement fixed-point forecast assessments for key facilities such as ports and airports that are more sensitive to typhoons. There is no method for assessing the scope of typhoons.

Summary of the invention

In view of this, the embodiments of the present application provide methods, devices, terminal devices, and storage media for evaluating the typhoon's impact range to solve the problem that the typhoon's impact range is not evaluated in the prior art.

The first aspect of the embodiments of the present application provides a method for evaluating the impact range of a typhoon, including:

Obtain the coastline location, typhoon landing location, the location of a preset number of observation sites, and the wind speed of the observation sites corresponding to the location of each observation site one-to-one;

A coordinate system is established with the typhoon landing position as the coordinate origin, wherein the x-axis of the coordinate system is based on the coastline position, the observation station on the x-axis meets a preset condition, and the y-axis of the coordinate system is vertical On the x-axis;

Dividing the coordinate system into a number of areas according to a preset division rule;

Divide each observation site into several levels according to the wind speed of the observation site;

Count the observation sites of each level in each area, select the farthest site of the main influence from the observation sites of each level in each area according to the preset selection rule, and use the farthest site of the main influence as the corresponding level Fitting stations in the corresponding area;

According to the location of the fitting station, the boundary curve of the influence range of each level of gale caused by the typhoon is fitted.

The second aspect of the embodiments of the present application provides a typhoon impact range assessment device, including:

The acquisition module is used to acquire the position of the coastline, the landing position of the typhoon, the position of a preset number of observation sites, and the wind speed of the observation site corresponding to the position of each observation site one-to-one;

The coordinate establishment module is used to establish a coordinate system with the typhoon landing position as the coordinate origin, wherein the x-axis of the coordinate system is based on the coastline position, and the observation station on the x-axis meets a preset condition, The y-axis of the coordinate system is perpendicular to the x-axis;

An area division module, configured to divide the coordinate system into a number of areas according to preset division rules;

The class division module is used to classify each observation site into several classes according to the wind speed of the observation site;

The calculation module is used to count the observation sites of each level in each area, select the farthest site of the main influence from the observation sites of each level in each area according to the preset selection rule, and calculate the most affected site of the main influence. The far site is the fitting site of the corresponding level in the corresponding area;

The fitting module is used to fit the boundary curve of the influence range of each level of gale caused by the typhoon according to the location of the fitting station.

The third aspect of the embodiments of the present application provides a terminal device, including a memory, a processor, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, Implement the steps as described above.

The fourth aspect of the embodiments of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned method are implemented.

The fifth aspect of the embodiments of the present application provides a computer program product, which when the computer program product runs on a terminal device, causes the terminal device to execute the method described in any one of the above-mentioned first aspects.

The beneficial effects of the embodiments of the present application are: by acquiring the coastline position, the typhoon landing position, the position of at least one observation site, and the wind speed of the observation site corresponding to the position information of each observation site, a coordinate system is established with the typhoon landing position as the coordinate origin. Divide the coordinate system into several regions, divide each observation site into several levels according to the wind speed of the observation site, count the observation sites of each level in each region, and select the observation sites of each level in each region according to preset selection rules Select the farthest site of the main impact in the, use the farthest site of the main impact as the fitting site of the corresponding level in the corresponding area, and fit the boundary of the impact range of each level of gale caused by the typhoon according to the location of the fitting site Curve, the area between the typhoon landing position and the boundary curve of the typhoon’s influence range is the typhoon’s influence range of the corresponding level.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art.

FIG. 1 is a schematic flow chart of a method for evaluating a typhoon impact area provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of coordinate system division provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of coordinate system division provided by another embodiment of the present application;

FIG. 4 is a schematic flowchart of sub-steps of a method for assessing the typhoon impact area provided by an embodiment of the present application;

FIG. 5 is a schematic flow chart of a method for evaluating a typhoon impact area provided by another embodiment of the present application;

Fig. 6 is a schematic diagram of a typhoon impact range assessment device provided by an embodiment of the present application;

Fig. 7 is a schematic diagram of a terminal device provided by an embodiment of the present application.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obstructing the description of this application.

In order to illustrate the technical solution described in the present application, specific embodiments are used for description below.

It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the existence of the described features, wholes, steps, operations, elements and/or components, but does not exclude one or more other features The existence or addition of, whole, step, operation, element, component and/or its collection.

It should also be understood that the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in the specification of this application and the appended claims, unless the context clearly indicates other circumstances, the singular forms "a", "an" and "the" are intended to include plural forms.

It should be further understood that the term "and/or" used in the specification and appended claims of this application refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations .

As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "once" or "in response to determination" or "in response to detection" depending on the context . Similarly, the phrase "if determined" or "if detected [described condition or event]" can be interpreted as meaning "once determined" or "in response to determination" or "once detected [described condition or event]" depending on the context ]" or "in response to detection of [condition or event described]".

The following describes the typhoon impact area evaluation method provided by an embodiment of the present application. Please refer to Figure 1. The typhoon impact area evaluation method provided by an embodiment of the present application includes:

Step S101: Obtain the position of the coastline, the landing position of the typhoon, the positions of a preset number of observation sites, and the wind speed of the observation sites corresponding to the positions of each observation site one-to-one.

Among them, the coastline location, typhoon landing location and the location of the observation site all include longitude and latitude information. Some observation sites are located on the coastline, and some observation sites are on land. The preset number is the number required for the evaluation and calculation of the typhoon impact area. Generally, the more observation sites there are, the more accurate the evaluation of the typhoon impact area.

Step S102: Establish a coordinate system with the typhoon landing position as the origin of the coordinate, wherein the x-axis of the coordinate system is based on the coastline position, the observation station on the x-axis meets a preset condition, and the coordinate system The y-axis is perpendicular to the x-axis.

Specifically, the coastline is an irregular curve, and the x-axis of the coordinate system is a straight line. A straight line with the longest overlap distance with the coastline and the largest number of observation sites distributed above the straight line is selected as the x-axis, passing through the origin of the coordinates and perpendicular to the x-axis The straight line is the y-axis.

Step S103: Divide the coordinate system into several regions according to a preset division rule.

In a possible implementation, the coordinate system is divided into several fan-shaped regions. Specifically, the area in the positive direction of the y-axis of the coordinate system is evenly divided into a number of fan-shaped areas with the origin of the coordinate as the center of the circle. For example, as shown in Figure 2, take the coastline of Guangdong, China as an example. After the coordinate system is established, a straight line is drawn every 20° with the x-axis as the reference line, and the positive y-axis area of the coordinate system is divided into 9 A fan-shaped area past the origin.

In a possible implementation, the coordinate system is divided into several square areas. Specifically, the coordinate system is divided into a number of regions parallel to the y-axis at equal intervals on the x-axis along the positive direction of the y-axis with the origin of the coordinates as the center. For example, as shown in Figure 3, take the coastline of Guangdong, China as an example. After the coordinate system is established, the y-axis is the center, and the x-axis is divided into 16 parallel to the positive direction of the y-axis at intervals of 50km. The area of the y-axis.

Step S104: Divide each observation site into several levels according to the wind speed of the observation site.

For example, the observation sites with 17.2 m/s ≤ wind speed ＜ 24.5 m/s are divided into 8-level sites, and the observation sites with 24.5 m/s ≤ wind speed <32.7 m/s are classified as 10-level sites, and the wind speed is ≥ 32.7 m/s. Second observation sites are divided into 12-level sites.

Step S105: Count the observation sites of each level in each area, select the farthest site of the main influence from the observation sites of each level in each area according to the preset selection rule, and divide the farthest site of the main influence As the fitting site of the corresponding level in the corresponding area.

In a possible implementation manner, since observation sites with higher altitudes are not universal in space, the observation sites with altitudes greater than a preset altitude are removed, and then the fitting sites of each level in each region are calculated. For example, after removing observation sites with an altitude greater than 300 meters, the fitted sites are calculated.

In a possible implementation, if the positive y-axis area of the coordinate system is evenly divided into several fan-shaped areas with the origin of the coordinates as the center, the reference point is the origin of the coordinates, and for each level in each area , Will satisfy the formula

R _i is the distance between the farthest site that is mainly affected and the origin of the coordinate, where N represents the number of observation sites of one level in an area, and i represents the origin of the observation sites of one level in the area according to the distance coordinate origin The order value of the observation site after the distance is sorted in ascending order, R _i represents the distance between the i-th observation site and the origin of the coordinate, and max represents the maximum value operation. When F _R takes the maximum value, the corresponding R _{i is} the distance between the fitting site and the origin of the coordinate. Since the farther from the origin of the coordinates, the lower the probability of strong winds, compared _{to the observation site corresponding to the maximum value of R i} as the fitting site, the above formula can be used to eliminate abnormal observations that are far from the origin of the coordinates but with greater wind speeds. point.

In a possible implementation, if the coordinate origin is taken as the center, along the positive direction of the y-axis, the coordinate system is divided into several areas parallel to the y-axis at equal intervals on the x-axis, and the reference line is the x-axis. , Arrange the observation sites of each level in each area in ascending order of distance from the x-axis, and set the observation sites ranked as the preset value as the most distant sites that are mainly affected. For example, among the ordered observation sites, the observation site ranked in the preset serial number (for example, the serial number is 95% of the total number of observation sites) is the most distant site that is mainly affected, that is, the fitting site. For example, if the number of observation sites of a certain level in a certain area is 100, after they are arranged in ascending order of distance from the x-axis, the observation site with a ranking of 95 is selected as the fitting site, which can eliminate the distance from the reference point and the occurrence An abnormal site with a low probability of strong winds.

Step S106: Fit the boundary curve of the influence range of each level of gale caused by the typhoon according to the location of the fitting station.

Among them, you can select only the fitting stations calculated after dividing the coordinate system into several fan-shaped areas to participate in the fitting, or you can select only the fitting stations calculated after dividing the coordinate system into several square areas to participate in the fitting, or The fitting stations calculated by the two division methods all participate in the fitting.

Since each fitting site is the farthest site of the main influence selected from the observation sites whose wind speed is in the same grade interval, after removing the abnormal observation points, the location of the fitting site represents the most important influence of the wind speed of the grade. Long distance. Therefore, the area formed by connecting the fitting stations of the same level is the main influence area of the typhoon. After fitting the connection of the fitting stations of the same level, the influence of the gale of that level caused by the typhoon can be obtained. The boundary curve of the range.

In a possible implementation manner, as shown in FIG. 4, step S106 specifically includes:

Step S201: Establish a polynomial function for each level

Among them, x represents the distance of the fitting site from the y axis, x ^j represents the j power of x, a _j represents the coefficient of the polynomial function, and y(x,a) represents the value calculated from _{a j} and x ^j;

Step S202: Establish a loss function

Among them, x _n represents the distance of the fitting site of the n-th area from the y axis, y(x _n ,a) represents _{the value calculated by substituting x n} into the polynomial function, and y _n represents the observation corresponding to x _n The distance between the station and the x-axis;

Step S203: optimize the coefficients of the polynomial function according to the loss function.

In a possible implementation, according to the formula

A=(X ^T X+λE _m+1 ) ^-1 X ^T Y calculates the coefficients of the polynomial function, where,

X ^T is the transposition matrix of X, Y is the matrix composed of the distances of the observation sites corresponding to each observation site in X from the x axis, and λE _m+1 is the regular term.

Specifically, taking the derivative of the loss function, and its derivative being 0, we can get A=(X ^T X) ^-1 X ^T Y. In order to prevent over-fitting, after introducing the regular term, we can get A=(X ^T X+λE _m+1 ) ^-1 X ^T Y.

Step S204: Generate an optimized polynomial function according to the coefficients of the optimized polynomial function, and the curve corresponding to the optimized polynomial function is the boundary curve of the influence range of the corresponding level of gale caused by the typhoon.

Specifically, in the above possible implementation, the calculated optimal A is the coefficient of the polynomial, and the polynomial function can be obtained according to the coefficient of the polynomial, and the corresponding polynomial function can be drawn in the coordinate system according to the polynomial function. Curve, the area enclosed by the curve corresponding to the polynomial function is the range affected by the level of gale caused by the typhoon.

In the above embodiment, the typhoon landing position is taken as the origin of the coordinates, the coordinate system is established based on the coastline position, the coordinate system is divided into several areas according to preset rules, the observation stations are divided into several levels according to the wind speed, and each area in each area is counted. According to the preset selection rules, select the farthest station of main influence from the observation stations of each grade in each area according to the preset selection rules, and use the farthest station of the main influence as the fitting of the corresponding grade in the corresponding area. Station, according to the location of the fitting station, fit the boundary curve of the influence range of the typhoon of each level of gale. The range enclosed by the boundary curve is the influence range of the typhoon, which can affect the influence of each level of gale caused by the typhoon The scope is evaluated to provide a basis for the prediction during the movement of the typhoon.

It should be understood that the size of the sequence number of each step in the foregoing embodiment does not mean the order of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

As shown in FIG. 5, the method for evaluating the impact range of a typhoon provided by another embodiment of the present application differs from the previous embodiment in that it further includes the following steps.

Step S301: Obtain the position of the typhoon and the moving direction of the typhoon at each time.

In a possible implementation manner, the moving direction of the typhoon can be calculated according to the position of the typhoon at each time. Specifically, according to the formula

Calculate the movement direction of the typhoon, where D _PB represents the spatial distance between the typhoon position P at the previous moment and the typhoon position B _{at this time, and D BC} represents the typhoon position B at this time and the typhoon position C at the next moment. The spatial distance between

Indicates the azimuth of the typhoon moving from position A to B,

Represents a typhoon from position B to C azimuth, T _a represents the direction of movement of the typhoon.

Step S302: Re-establish a coordinate system with the typhoon position at the current moment as the coordinate origin and the typhoon movement direction as the positive direction of the y-axis.

Step S303: Calculate the boundary curve of the influence range of each level of gale caused by the moving background wind of the typhoon in the newly established coordinate system.

Specifically, in the newly established coordinate system, according to the method of step S103 to step S106, the boundary curve of the influence range of each level of gale caused by the moving background wind of the typhoon is refitted.

In a possible implementation method, the radius, coastline location, typhoon landing location, observation site location, observation site wind speed, and typhoon movement direction corresponding to the impact range of various levels of gales caused by typhoons are calculated to establish a typhoon evaluation database. In a possible implementation manner, the typhoon evaluation database may also include information such as time, observation site code, typhoon name, typhoon intensity, and typhoon movement speed.

Among them, the speed of the typhoon can be determined by the formula

Calculation, where D _PB represents the spatial distance between the position P of the typhoon at the previous moment and the position B _{of the typhoon at this time, and D BC} represents the spatial distance between the typhoon position B at this time and the typhoon position C at the next moment. T represents the total time taken by the typhoon to move from position P to position C.

In the above embodiment, the coordinate system is re-established with the typhoon position at the current moment as the coordinate origin and the typhoon movement direction as the positive direction of the y-axis; in the re-established coordinate system, the influence range of each level of gale caused by the typhoon movement background wind is calculated The boundary curve of the typhoon can be used to calculate the influence range of the typhoon at each time of the strong wind of each level, so as to provide a reference for the prediction of the typhoon movement.

The embodiment of the application also provides a typhoon impact area assessment device. For ease of description, only the parts related to this application are shown. As shown in Figure 6, the typhoon impact area assessment device includes:

The obtaining module 10 is used to obtain the position of the coastline, the landing position of the typhoon, the positions of a preset number of observation sites, and the wind speed of the observation sites corresponding to the positions of each observation site one-to-one;

The coordinate establishing module 20 is used to establish a coordinate system with the typhoon landing position as the origin of the coordinate, wherein the x-axis of the coordinate system is based on the position of the coastline, and the observation station on the x-axis meets the preset conditions, so The y-axis of the coordinate system is perpendicular to the x-axis;

The area division module 30 is configured to divide the coordinate system into a number of areas according to preset division rules;

The class division module 40 is used to classify each observation site into several classes according to the wind speed of the observation site;

The calculation module 50 is used to count the observation sites of each level in each area, select the farthest site with main influence from the observation sites of each level in each area according to preset selection rules, and calculate the main influence The farthest site is the fitting site of the corresponding level in the corresponding area;

The fitting module 60 is used to fit the boundary curve of the influence range of each level of gale caused by the typhoon according to the location of the fitting station.

In a possible implementation manner, the area division module is specifically configured to:

The coordinate system is divided into several fan-shaped areas, and/or the coordinate system is divided into several square areas.

In a possible implementation manner, the area division module is also specifically configured to:

The area in the positive direction of the y-axis of the coordinate system is evenly divided into a number of fan-shaped areas with the coordinate origin as the center.

In a possible implementation manner, the calculation module is specifically configured to:

Will satisfy the formula

R _i is the distance between the farthest site that is mainly affected and the origin of the coordinate, where N represents the number of observation sites of one level in one of the areas, and i represents the distance coordinates of the observation sites of one level in the area The distance of the origin is the order value of the observation site after sorting in ascending order. R _i represents the distance between the i-th observation site and the origin of the coordinate, and max represents the maximum value operation.

The coordinate system is divided into a number of regions parallel to the y axis at equal intervals on the x axis along the positive direction of the y axis with the coordinate origin as the center.

The observation sites of each level in each area are arranged in ascending order of distance from the x-axis, and the observation sites ranked as the preset value are regarded as the farthest sites that are mainly affected.

In a possible implementation manner, the fitting module is specifically used for:

Create a polynomial function for each level

Build a loss function

Among them, x _n represents the distance of the fitting site of the n-th area from the y axis, y(x _n ,a) represents _{the value calculated by substituting x n} into the polynomial function, and y _n represents the observation corresponding to x _n The distance between the station and the x-axis; optimize the coefficients of the polynomial function according to the loss function; generate the optimized polynomial function according to the coefficients of the optimized polynomial function, and the curve corresponding to the optimized polynomial function is caused by the typhoon The boundary curve of the influence range of the corresponding level of gale.

In a possible implementation manner, the fitting module is also specifically used for:

Calculate the coefficients of the polynomial function according to the formula A=(X ^T X+λE _m+1 ) ^-1 X ^{T Y, where,}

In a possible implementation manner, the calculation module is also used to:

Observing sites whose altitude is greater than the preset altitude are removed.

In a possible implementation manner, the device further includes:

The mobile module is used to obtain the position of the typhoon and the moving direction of the typhoon at each time;

Re-establish a coordinate system with the typhoon position at the current moment as the origin of the coordinates and the movement direction of the typhoon as the positive direction of the y-axis;

In the re-established coordinate system, the boundary curve of the influence range of each level of gale caused by the moving background wind of the typhoon is calculated.

In a possible implementation manner, the mobile module is also used to:

The movement direction of the typhoon is calculated according to the position of the typhoon at each time.

In a possible implementation manner, the mobile module is specifically configured to:

According to the formula

Indicates the azimuth of the typhoon moving from position P to B,

It should be noted that the information interaction and execution process between the above-mentioned devices/units are based on the same concept as the method embodiment of this application, and its specific functions and technical effects can be found in the method embodiment section. I won't repeat it here.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the division of the above functional units and modules is used as an example. In practical applications, the above functions can be allocated to different functional units and modules as needed. Module completion, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist alone physically, or two or more units can be integrated into one unit. The above-mentioned integrated units can be hardware-based Formal realization can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only used to facilitate distinguishing each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the foregoing system, reference may be made to the corresponding process in the foregoing method embodiment, which will not be repeated here.

Fig. 7 is a schematic diagram of a terminal device provided by an embodiment of the present application. As shown in FIG. 7, the terminal device of this embodiment includes a processor 11, a memory 12, and a computer program 13 stored in the memory 12 and running on the processor 11. When the processor 11 executes the computer program 13, the steps in the above-mentioned embodiment of the method for evaluating the impact range of a typhoon are implemented, for example, steps S101 to S106 shown in FIG. 1. Alternatively, when the processor 11 executes the computer program 13, the functions of the modules/units in the foregoing device embodiments, for example, the functions of the modules 10 to 60 shown in FIG. 6 are realized.

Exemplarily, the computer program 13 may be divided into one or more modules/units, and the one or more modules/units are stored in the memory 12 and executed by the processor 11 to complete This application. The one or more modules/units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 13 in the terminal device.

The processor 11 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

The memory 12 may be an internal storage unit of the terminal device, such as a hard disk or memory of the terminal device. The memory 12 may also be an external storage device of the terminal device, such as a plug-in hard disk equipped on the terminal device, a smart memory card (Smart Media Card, SMC), or a Secure Digital (SD) card, Flash Card, etc. Further, the memory 12 may also include both an internal storage unit of the terminal device and an external storage device. The memory 12 is used to store the computer program and other programs and data required by the terminal device. The memory 12 can also be used to temporarily store data that has been output or will be output.

Those skilled in the art can understand that FIG. 5 is only an example of a terminal device, and does not constitute a limitation on the terminal device. It may include more or less components than those shown in the figure, or a combination of certain components, or different components, such as Terminal devices may also include input and output devices, network access devices, buses, and so on.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail or recorded in an embodiment, reference may be made to related descriptions of other embodiments.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed device/terminal device and method may be implemented in other ways. For example, the device/terminal device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units. Or components can be combined or integrated into another system, or some features can be omitted or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated module/unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiments and methods, and can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, it can implement the steps of the foregoing method embodiments. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate forms. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunications signal, and software distribution media, etc.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in Within the scope of protection of this application.

Claims

A method for assessing the scope of typhoon impact, which is characterized in that it includes:

Obtain the coastline location, typhoon landing location, the location of a preset number of observation sites, and the wind speed of the observation sites corresponding to the location of each observation site one-to-one;

A coordinate system is established with the typhoon landing position as the coordinate origin, wherein the x-axis of the coordinate system is based on the coastline position, the observation station on the x-axis meets a preset condition, and the y-axis of the coordinate system is vertical On the x-axis;

Dividing the coordinate system into a number of areas according to a preset division rule;

Divide each observation site into several levels according to the wind speed of the observation site;

Count the observation sites of each level in each area, select the farthest site of the main influence from the observation sites of each level in each area according to the preset selection rule, and use the farthest site of the main influence as the corresponding level Fitting stations in the corresponding area;

According to the location of the fitting station, the boundary curve of the influence range of each level of gale caused by the typhoon is fitted.
The method for assessing the typhoon impact area according to claim 1, wherein the dividing the coordinate system into a number of areas according to a preset division rule specifically includes:

The coordinate system is divided into several fan-shaped areas, and/or the coordinate system is divided into several square areas.
The method for assessing the typhoon impact area according to claim 2, wherein the dividing the coordinate system into several fan-shaped areas specifically includes:

The area in the positive direction of the y-axis of the coordinate system is evenly divided into a number of fan-shaped areas with the coordinate origin as the center.
The method for assessing the typhoon impact area according to claim 3, wherein the selection of the farthest site that is mainly affected from the observation sites of each level in each area according to a preset selection rule includes:

Will satisfy the formula
R i is the distance between the farthest site that is mainly affected and the origin of the coordinate, where N represents the number of observation sites of one level in an area, and i represents the origin of the observation sites of one level in the area according to the distance coordinate origin The order value of the observation site after the distance is sorted in ascending order, R i represents the distance between the i-th observation site and the origin of the coordinate, and max represents the maximum value operation.
The method for assessing the typhoon impact area according to claim 2, wherein the dividing the coordinate system into a plurality of square areas specifically includes:

The coordinate system is divided into a number of regions parallel to the y axis at equal intervals on the x axis along the positive direction of the y axis with the coordinate origin as the center.
The method for assessing the typhoon impact area according to claim 5, wherein the selection of the farthest site that is mainly affected from the observation sites of each level in each area according to a preset selection rule includes:

The observation sites of each level in each area are arranged in ascending order of distance from the x-axis, and the observation sites ranked as the preset value are regarded as the farthest sites that are mainly affected.
The method for evaluating the impact range of a typhoon according to claim 1, wherein the fitting of the boundary curve of the impact range of each level of gale caused by the typhoon according to the location of the fitting site specifically includes:

Create a polynomial function for each level

Among them, x represents the distance of the fitting site from the y axis, x j represents the j power of x, a j represents the coefficient of the polynomial function, and y(x,a) represents the value calculated from a j and x j;

Build a loss function

Among them, x n represents the distance of the fitting site of the n-th area from the y axis, y(x n ,a) represents the value calculated by substituting x n into the polynomial function, and y n represents the observation corresponding to x n The distance between the station and the x-axis;

Optimizing the coefficients of the polynomial function according to the loss function;

The optimized polynomial function is generated according to the coefficients of the optimized polynomial function, and the curve corresponding to the optimized polynomial function is the boundary curve of the influence range of the corresponding level of gale caused by the typhoon.
8. The method for evaluating the typhoon impact area according to claim 7, wherein the optimization of the coefficients of the polynomial function according to the loss function specifically includes:

Calculate the coefficients of the polynomial function according to the formula A=(X T X+λE m+1 ) -1 X T Y, where,

X T is the transposition matrix of X, Y is the matrix composed of the distances of the observation sites corresponding to each observation site in X from the x axis, and λE m+1 is the regular term.
The method for assessing the scope of typhoon influence according to claim 1, wherein the statistics of the observation sites of each level in each area are selected from the observation sites of each level in each area according to a preset selection rule. The farthest site of the main influence, using the farthest site of the main influence as the corresponding level before the fitting site of the corresponding area, the method further includes:

Observing sites whose altitude is greater than the preset altitude are removed.
The method for assessing the typhoon impact range according to claim 1, wherein after fitting the boundary curve of the impact range of each level of gale caused by the typhoon according to the location of the fitting site, the method further comprises:

Obtain the position of the typhoon and the direction of the typhoon at each time;

Re-establish a coordinate system with the typhoon position at the current moment as the origin of the coordinates and the movement direction of the typhoon as the positive direction of the y-axis;

In the re-established coordinate system, the boundary curve of the influence range of each level of gale caused by the moving background wind of the typhoon is calculated.
The method for assessing the typhoon impact area according to claim 10, wherein the method further comprises:

The movement direction of the typhoon is calculated according to the position of the typhoon at each time.
The method for assessing the typhoon impact area according to claim 11, wherein the calculating the typhoon movement direction according to the position of the typhoon at each time specifically includes:

According to the formula
Calculate the moving direction of the typhoon,

Among them, D PB represents the spatial distance between the position P of the typhoon at the previous moment and the position B of the typhoon at this time, and D BC represents the spatial distance between the typhoon position B at this time and the typhoon position C at the next moment.
Indicates the azimuth of the typhoon moving from position P to B,
Represents a typhoon from position B to C azimuth, T a represents the direction of movement of the typhoon.
A typhoon impact range assessment device, which is characterized in that it includes:

The acquisition module is used to acquire the position of the coastline, the landing position of the typhoon, the position of a preset number of observation sites, and the wind speed of the observation site corresponding to the position of each observation site one-to-one;

The coordinate establishment module is used to establish a coordinate system with the typhoon landing position as the coordinate origin, wherein the x-axis of the coordinate system is based on the coastline position, and the observation station on the x-axis meets a preset condition, The y-axis of the coordinate system is perpendicular to the x-axis;

An area division module, configured to divide the coordinate system into a number of areas according to preset division rules;

The class division module is used to classify each observation site into several classes according to the wind speed of the observation site;

The calculation module is used to count the observation sites of each level in each area, select the farthest site of the main influence from the observation sites of each level in each area according to the preset selection rule, and calculate the most affected site of the main influence. The far site is the fitting site of the corresponding level in the corresponding area;

The fitting module is used to fit the boundary curve of the influence range of each level of gale caused by the typhoon according to the location of the fitting station.
The typhoon impact range assessment device according to claim 13, wherein the area division module is specifically used for:

The coordinate system is divided into several fan-shaped areas, and/or the coordinate system is divided into several square areas.
The typhoon impact range assessment device according to claim 14, wherein the area division module is further specifically configured to:

The area in the positive direction of the y-axis of the coordinate system is evenly divided into a number of fan-shaped areas with the origin of the coordinate as the center of the circle.
The typhoon impact range assessment device according to claim 15, wherein the calculation module is specifically configured to: satisfy the formula
R i is the distance between the farthest site that is mainly affected and the origin of the coordinate, where N represents the number of observation sites of one level in an area, and i represents the origin of the observation sites of one level in the area according to the distance coordinate origin The order value of the observation site after the distance is sorted in ascending order, R i represents the distance between the i-th observation site and the origin of the coordinate, and max represents the maximum value operation.
The typhoon impact range assessment device according to claim 14, wherein the area division module is further specifically configured to:

The coordinate system is divided into a number of regions parallel to the y axis at equal intervals on the x axis along the positive direction of the y axis with the coordinate origin as the center.
The typhoon impact range assessment device according to claim 17, wherein the calculation module is specifically configured to:

The observation sites of each level in each area are arranged in ascending order of distance from the x-axis, and the observation sites ranked as the preset value are regarded as the farthest sites that are mainly affected.
A terminal device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor executes the computer program as claimed in claims 1 to 12. Steps of any one of the methods.
A computer-readable storage medium storing a computer program, wherein the computer program implements the steps of the method according to any one of claims 1 to 12 when the computer program is executed by a processor.