CN111816219A - An intelligent electromagnetic degaussing system and method based on target recognition - Google Patents

Abstract

The invention discloses an intelligent electromagnetic degaussing system and method based on target recognition. The intelligent electromagnetic degaussing system includes: a main control chip, at least one degaussing coil array, and at least one identification coil array; the degaussing coil array is used for transmitting medium detection signals; Magnetic induction signal; the main control chip is used to classify and identify the electromagnetic induction signal, determine the material, shape, size and position of the magnetic storage medium, and determine the degaussing power according to the material, shape and size, and determine the information of the degaussing coil array according to the position; degaussing The coil array is also used to generate a strong magnetic field required for degaussing the magnetic storage medium according to the degaussing power and the information of the degaussing coil array, so as to realize degaussing. The invention can avoid waste of electric energy, prolong the service life of the demagnetizer, and at the same time reduce the influence on office electricity and electromagnetic environment.

Description

An intelligent electromagnetic degaussing system and method based on target recognition

technical field

The invention relates to the electromagnetic field, in particular to an intelligent electromagnetic degaussing system and method based on target recognition.

Background technique

Destruction of magnetic carriers is the last link in the security management of state secret carriers. The main magnetic carriers include hard disks, magnetic tapes, floppy disks and other magnetic storage media. Electromagnetic degaussing machine is a degaussing technology that uses a strong magnetic field to destroy information in a magnetic storage medium, that is, by injecting a strong instantaneous current into the electromagnetic coil, a super-strong magnetic field is generated in the center of the electromagnetic coil, so that the magnetic storage placed inside the electromagnetic coil can be stored. Media degaussing, which is a technical means of completely destroying information.

In order to ensure the effect of electromagnetic degaussing, the electromagnetic degaussing machine needs to generate a strong magnetic field of more than 8500Gs (according to the first-level degaussing standard of the Security Bureau), which requires injecting a strong instantaneous current into the electromagnetic coil (the current peak value may be greater than 150A). The strong current will generate high voltage at both ends of the coil, and when the demagnetizer is used in the office environment, it may affect other electrical equipment. In addition, for magnetic media of different materials and sizes, the magnetic field strength required to achieve complete degaussing is different, and with the development of technology, the types of magnetic media are also increasing, which brings about the use and upgrade of electromagnetic degaussing machines. difficulty. If the maximum power of the demagnetizer is simply used in order to achieve the demagnetization effect, it will bring about a great waste of electric energy and shorten the service life of the demagnetizer.

SUMMARY OF THE INVENTION

Based on this, it is necessary to provide an intelligent electromagnetic degaussing system and method based on target recognition, which can intelligently discriminate the type and size of the magnetic storage medium, and adaptively adjust the input current of the degaussing coil to avoid waste of electric energy and prolong the service life of the degaussing machine. At the same time, the impact on office electricity and electromagnetic environment is reduced.

For achieving the above object, the present invention provides the following scheme:

An intelligent electromagnetic degaussing system based on target recognition, comprising: a main control chip, at least one degaussing coil array and at least one identification coil array; both the degaussing coil array and the identification coil array are electrically connected to the main control chip; The degaussing coil array is used to transmit medium detection signals; the identification coil array is used to collect electromagnetic induction signals generated by the medium detection signals in the magnetic storage medium, and send the electromagnetic induction signals to the main control chip ; The main control chip is used to classify and identify the electromagnetic induction signal, determine the material, shape, size and position of the magnetic storage medium, and determine the degaussing power according to the material, the shape and the size , determine the degaussing coil array information according to the position; the degaussing coil array information includes the number, number and corresponding position of the degaussing coil arrays participating in degaussing; the degaussing coil array is also used for degaussing power and the degaussing coil The array information generates a strong magnetic field required to degauss the magnetic storage medium to achieve degaussing.

Optionally, the intelligent electromagnetic degaussing system based on target recognition further includes a transmitting circuit matched with the degaussing coil array and a receiving circuit matched with the identification coil array; the degaussing coil array is connected with the transmitting circuit through the transmitting circuit. the main control chip is electrically connected; the identification coil array is electrically connected to the main control chip through the receiving circuit; the transmitting circuit is used for generating a degaussing current according to the degaussing power and injecting it into the degaussing coil array to The degaussing coil array is driven to generate a strong magnetic field; the receiving circuit is used to collect the electromagnetic induction signal, digitize the electromagnetic induction signal, and transmit it to the main control chip.

Optionally, the main control chip includes: a medium identification module, an intelligent adjustment module, and a degaussing control module; the medium identification module is used to classify and identify the electromagnetic induction signal, and determine the material of the magnetic storage medium, shape, size and position; the intelligent adjustment module is used to determine the degaussing power according to the material, the shape and the size, and the degaussing coil array information according to the position; the degaussing control module is used to determine the degaussing power according to the degaussing The power generates a degaussing current drive signal to drive a corresponding degaussing coil array to generate a degaussing magnetic field.

Optionally, the medium identification module includes:

A classification and identification unit for classifying and identifying the electromagnetic induction signal by using a machine learning algorithm or an equation solving algorithm, and determining the material, shape, size and position of the magnetic storage medium; the machine learning algorithm is a decision tree algorithm , Bayesian algorithm, neural network algorithm or deep learning algorithm; the equation solving algorithm is a linear equation solving algorithm or a nonlinear equation solving algorithm.

Optionally, the intelligent adjustment module includes:

an adjustment unit, used for using a machine learning algorithm or an equation solving algorithm to determine the degaussing power according to the material, the shape and the size, and to determine the information of the degaussing coil array according to the position

Optionally, the main control chip further includes a timing control module; the timing control module is configured to control the timing relationship among the medium identification module, the intelligent adjustment module and the degaussing control module.

Optionally, after the receiving circuit collects the electromagnetic induction signal, the degaussing coil array is disconnected from the transmitting circuit.

Optionally, after the receiving circuit collects the electromagnetic induction signal, the degaussing coil array is electrically connected to the transmitting circuit.

The present invention also provides an intelligent electromagnetic degaussing method based on target recognition, comprising:

Control the degaussing coil array to transmit medium detection signal;

acquiring the electromagnetic induction signal collected by the identification coil array; the electromagnetic induction signal is generated by the medium detection signal in the magnetic storage medium;

classifying and identifying the electromagnetic induction signal, and determining the material, shape, size and position of the magnetic storage medium;

The degaussing power is determined according to the material, the shape and the size, and the information of the degaussing coil array is determined according to the position; the degaussing coil array information includes the number, number and corresponding position of the degaussing coil array participating in the degaussing;

According to the degaussing power and the information of the degaussing coil array, the corresponding degaussing coil array is controlled to generate a strong magnetic field required for degaussing the magnetic storage medium, so as to realize degaussing.

Optionally, the classification and identification of the electromagnetic induction signal to determine the material, shape, size and position of the magnetic storage medium specifically include:

Use machine learning algorithm or equation solving algorithm to classify and identify the electromagnetic induction signal, and determine the material, shape, size and position of the magnetic storage medium; the machine learning algorithm is a decision tree algorithm, a Bayesian algorithm, A neural network algorithm or a deep learning algorithm; the equation solving algorithm is a linear equation solving algorithm or a nonlinear equation solving algorithm.

Compared with the prior art, the beneficial effects of the present invention are:

The invention proposes an intelligent electromagnetic degaussing system and method based on target recognition. The electromagnetic induction signal of the medium detection signal in the magnetic storage medium is collected by the identification coil array, and then the material, shape and size of the magnetic storage medium are determined by the main control chip. Information such as magnetic storage and location can provide a basis for the degaussing magnetic field strength required for the intelligent adjustment of the degaussing machine, so that the degaussing power can be intelligently adjusted according to the material, shape, size and position of the magnetic storage medium, and the input current of the degaussing coil can be adaptively adjusted. The waste of electric energy is avoided, the service life of the degaussing machine is prolonged, and the impact on office electricity and electromagnetic environment is reduced while ensuring the degaussing effect.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

1 is a structural block diagram of an intelligent electromagnetic degaussing system based on target recognition provided by an embodiment of the present invention;

2 is a positional relationship diagram of an intelligent electromagnetic degaussing system based on target recognition provided by an embodiment of the present invention;

3 is a schematic diagram of an implementation process of a medium identification module provided by an embodiment of the present invention;

4 is a schematic diagram of an implementation process of an intelligent adjustment module provided by an embodiment of the present invention;

FIG. 5 is a flowchart of an intelligent electromagnetic degaussing method based on target recognition provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of an intelligent electromagnetic degaussing system based on target recognition provided by an embodiment of the present invention.

Referring to FIG. 1 , the intelligent electromagnetic degaussing system based on target recognition in this embodiment includes: a main control chip 101 , at least one degaussing coil array 102 and at least one identification coil array 103 . The degaussing coil array 102 and the identification coil array 103 are both electrically connected to the main control chip 101; the degaussing coil array 102 is used as a transmitting coil for identification signals during the identification process of the magnetic storage medium, and the identification process is in the degaussing process. Before, the degaussing coil array 102 is used to transmit medium detection signals; the identification coil array 103 is used to collect the electromagnetic induction signals generated by the medium detection signals in the magnetic storage medium, and send the electromagnetic induction signals to the The main control chip 101; the main control chip 101 is used to classify and identify the electromagnetic induction signal, determine the material, shape, size and position of the magnetic storage medium, and The size determines the degaussing power, and the information of the degaussing coil array 102 is determined according to the position; the degaussing coil array 102 information includes the number, number and corresponding position of the degaussing coil arrays 102 involved in degaussing; the degaussing coil array 102 is also used for A strong magnetic field required for degaussing the magnetic storage medium is generated according to the degaussing power and the information of the degaussing coil array 102 to achieve degaussing. FIG. 2 is a positional relationship diagram of an intelligent electromagnetic degaussing system based on target recognition provided by an embodiment of the present invention. Referring to FIG. 2 , the degaussing cavity 201 is divided into upper and lower parts, which are a first layer and a second layer respectively. The degaussing coil array 102 and the identification coil array 103, the identification coil array 103 is located on both sides of the degaussing coil array 102, and the magnetic storage medium 202 is arranged in the second layer. In practical applications, the arrangement of the coils can be modified according to the needs of the system, and the degaussing coil array 102 and the identification coil array 103 can be converted according to the needs of the system.

As an optional implementation manner, the intelligent electromagnetic degaussing system based on target recognition further includes a transmitting circuit 104 matched with the degaussing coil array 102 and a receiving circuit 105 matched with the identification coil array 103; the The degaussing coil array 102 is electrically connected to the main control chip 101 through the transmitting circuit 104; the identification coil array 103 is electrically connected to the main control chip 101 through the receiving circuit 105; the identification coil array 103 may also be Connected to the transmitting circuit 104 and the receiving circuit 105 at the same time; the transmitting circuit 104 is used to generate a degaussing current according to the degaussing power and inject it into the degaussing coil array 102 to drive the degaussing coil array 102 to generate a strong magnetic field ; The receiving circuit 105 is used to collect the electromagnetic induction signal, digitize the electromagnetic induction signal, and transmit it to the main control chip 101 .

As an optional implementation manner, the main control chip 101 includes: a medium identification module 106, an intelligent adjustment module 107, a degaussing control module 108, and a timing control module 109; the medium identification module 106 is used to detect the electromagnetic induction The signal is classified and identified, and the material, shape, size and position of the magnetic storage medium are determined; the intelligent adjustment module 107 is used to determine the degaussing power according to the material, the shape and the size, and determine the degaussing power according to the position. Degaussing coil array 102 information; the degaussing control module 108 is used to generate a degaussing current drive signal according to the degaussing power to drive the corresponding degaussing coil array 102 to generate a degaussing magnetic field; the timing control module 109 is used to control the medium identification The timing relationship between the module 106 , the intelligent adjustment module 107 and the degaussing control module 108 . Before degaussing, the intelligent adjustment module 107 and the degaussing control module 108 may control the degaussing coil array 102 to generate a medium detection signal for many times, so as to improve the accuracy of medium identification.

As an optional implementation manner, the medium identification module 106 includes: a classification and identification unit, configured to use a machine learning algorithm or an equation system solving algorithm to classify and identify the electromagnetic induction signal, and determine the identification of the magnetic storage medium. Material, shape, size and position; the machine learning algorithm is a decision tree algorithm, a Bayesian algorithm, a neural network algorithm or a deep learning algorithm; the equation solving algorithm is a linear equation solving algorithm or a nonlinear equation solving algorithm .

As an optional implementation manner, the intelligent adjustment module 107 includes: an adjustment unit, configured to use a machine learning algorithm or an equation solving algorithm to determine the degaussing power according to the material, the shape and the size, and determine the degaussing power according to the Degaussing coil array 102 information for position determination

As an optional implementation manner, in order to prevent the strong magnetic field from destroying the receiving circuit 105 during degaussing, after the receiving circuit 105 collects the electromagnetic induction signal, the degaussing coil array 102 is disconnected from the transmitting circuit 104 .

As an optional implementation manner, after the receiving circuit 105 collects the electromagnetic induction signal, the degaussing coil array 102 is electrically connected to the transmitting circuit 104 to be used as a degaussing coil.

The specific implementation process of each module in the main control chip 101 will be introduced below.

FIG. 3 is a schematic diagram of an implementation process of a medium identification module provided by an embodiment of the present invention. Referring to Figure 3, the implementation process of the medium identification module includes:

Step 301 : the degaussing coil transmits a detection signal (the degaussing coil array transmits a medium detection signal).

Step 302: The magnetic medium induces a magnetic field signal. The steps are as follows:

The magnetic storage medium in the degaussing system will induce an electromagnetic induction signal, and the electromagnetic induction signal B _s (ω) can be expressed as:

为磁性存储介质中心指向识别线圈阵列中心的单位矢量，

为单位矩阵，

表示矢量相乘。因此，磁性存储介质感应信号的大小，除了与介质探测信号有关，还与介质的材质、形状、尺寸和位置有关。In the above formula, μ ₀ is the magnetic permeability in vacuum, m(ω) is the induced dipole moment at the location of the magnetic storage medium when the angular frequency is ω, m(ω) is related to the detection magnetic field and the material and shape of the medium. , the size is related, r is the distance from the identification coil array to the center of the magnetic storage medium,

is the unit vector pointing from the center of the magnetic storage medium to the center of the identification coil array,

is the identity matrix,

Represents vector multiplication. Therefore, the magnitude of the induction signal of the magnetic storage medium is not only related to the medium detection signal, but also related to the material, shape, size and position of the medium.

Step 303: The identification (degaussing) coil receives the medium induction signal. After it is identified that the coil array receives the medium induction signal, step 304 is executed.

Step 304: The medium identification module identifies and locates the medium. In this step, machine learning algorithms such as decision tree, Bayesian, neural network, and deep learning can be used, or traditional methods such as linear equations and nonlinear equations can be used to obtain the material, shape, size, and position of the medium.

FIG. 4 is a schematic diagram of an implementation process of an intelligent adjustment module provided by an embodiment of the present invention. After the identification process of the magnetic storage medium is completed, the intelligent adjustment process of the degaussing magnetic field is shown in Figure 4. The intelligent adjustment module 403 first obtains the medium type information 401 and the medium position information 402. The medium type information 401 includes the material, shape, size, etc.; then step 404 and step 405 are performed.

Step 404: Set the degaussing power according to the medium type information 401.

Step 405: Set the degaussing transmitting coil. The setting information includes the number, number and corresponding position of the transmitting coils involved in degaussing.

Finally, the degaussing control module controls the transmitting circuit by the set degaussing power and the set degaussing transmitting coil, generates a driving current, drives the corresponding coil to generate a degaussing magnetic field, and completes the degaussing.

The present invention also provides an intelligent electromagnetic degaussing method based on target recognition. FIG. 5 is a flowchart of the intelligent electromagnetic degaussing method based on target recognition provided by an embodiment of the present invention.

Referring to FIG. 5 , the intelligent electromagnetic degaussing method based on target recognition in this embodiment includes:

Step 501: Control the degaussing coil array to transmit a medium detection signal.

Step 502: Acquire an electromagnetic induction signal collected by the identification coil array; the electromagnetic induction signal is generated in a magnetic storage medium by the medium detection signal.

Step 503: Classify and identify the electromagnetic induction signal, and determine the material, shape, size and location of the magnetic storage medium.

Step 504: Determine the degaussing power according to the material, the shape and the size, and determine the degaussing coil array information according to the position.

The degaussing coil array information includes the number, number and corresponding position of the degaussing coil arrays involved in degaussing.

Step 505: Control the corresponding degaussing coil array to generate a strong magnetic field required for degaussing the magnetic storage medium according to the degaussing power and the degaussing coil array information, so as to realize degaussing.

As an optional implementation manner, the step 503 specifically includes:

Use machine learning algorithm or equation solving algorithm to classify and identify the electromagnetic induction signal, and determine the material, shape, size and position of the magnetic storage medium; the machine learning algorithm is a decision tree algorithm, a Bayesian algorithm, A neural network algorithm or a deep learning algorithm; the equation solving algorithm is a linear equation solving algorithm or a nonlinear equation solving algorithm.

A more specific implementation process of the intelligent electromagnetic degaussing method is provided below.

(1) The degaussing system injects the detection current I _t1 (medium detection signal) into the N degaussing coil arrays through the transmitting circuit to generate the detection magnetic field B ₁ .

(2) The detection magnetic field generates an induced magnetic field B _s in the magnetic storage medium, and the M identification coil arrays receive the induced magnetic field to generate received current signals I _r,i , i=1,2,...,M.

(3) The medium identification module consists of the detection current I _t1 , the position coordinates of the detection coil array (known by the system), the position coordinates of the identification coil array (known by the system), and the received current signal I _r,i , i=1,2, ...,M, substitute into the relationship model between the induced magnetic field and the medium and the main magnetic field, as shown in the following formula:

Establish a multi-dimensional equation system of the received signal and the type, size, and location of the medium, and obtain the medium type, size, and location by solving the equation system by least squares.

(4) According to the type and size of the medium, the intelligent adjustment module sets the current I _t2 that needs to be injected into the degaussing coil array, and the quantity Q of the degaussing coil array; the type and size of the medium and the current I _t2 of the degaussing coil, the degaussing coil can be pre-established The corresponding database between the number of coils Q, and the corresponding value is obtained by querying.

Among them, the database establishment method is: put different media into the degaussing system for testing, and when the degaussing effect is achieved, the current of the corresponding degaussing coil and the number of degaussing coils are stored in the database.

(5) According to the position of the medium, the intelligent adjustment module sets the number K of the coils involved in degaussing. The degaussed coil number can be obtained by querying by pre-establishing a corresponding database between the position of the medium and the degaussed coil number K.

Among them, the database establishment method: record the magnetic field intensity distribution generated by different coil combinations, and store them in the database.

(6) The intelligent degaussing system injects the degaussing current into the corresponding degaussing coil through the degaussing control module to complete the degaussing.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; meanwhile, for those skilled in the art, according to the present invention There will be changes in the specific implementation and application scope. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. an intelligent electromagnetic degaussing system based on target recognition, is characterized in that, comprises: main control chip, at least one degaussing coil array and at least one identification coil array; The main control chip is electrically connected; the degaussing coil array is used for transmitting medium detection signals; the identification coil array is used for collecting electromagnetic induction signals generated by the medium detection signals in the magnetic storage medium, and sending the electromagnetic induction signals to the main control chip; the main control chip is used to classify and identify the electromagnetic induction signal, determine the material, shape, size and position of the magnetic storage medium, and The size determines the degaussing power, and the degaussing coil array information is determined according to the position; the degaussing coil array information includes the number, number and corresponding position of the degaussing coil arrays involved in degaussing; the degaussing coil array is also used for degaussing according to the degaussing coil array. The power and the degaussing coil array information generate a strong magnetic field required to degauss the magnetic storage medium to achieve degaussing. 2 . The intelligent electromagnetic degaussing system based on target recognition according to claim 1 , further comprising a transmitting circuit matched with the degaussing coil array and a receiving circuit matched with the identification coil array; the The degaussing coil array is electrically connected to the main control chip through the transmitting circuit; the identification coil array is electrically connected to the main control chip through the receiving circuit; the transmitting circuit is used to generate a degaussing current according to the degaussing power And inject into the degaussing coil array to drive the degaussing coil array to generate a strong magnetic field; the receiving circuit is used to collect the electromagnetic induction signal, digitize the electromagnetic induction signal, and transmit it to the main control chip. 3. The intelligent electromagnetic degaussing system based on target recognition according to claim 1, wherein the main control chip comprises: a medium identification module, an intelligent adjustment module and a degaussing control module; the medium identification module is used for The electromagnetic induction signal is classified and identified, and the material, shape, size and position of the magnetic storage medium are determined; the intelligent adjustment module is used for determining the degaussing power according to the material, the shape and the size, and according to the The position determines degaussing coil array information; the degaussing control module is configured to generate a degaussing current drive signal according to the degaussing power, so as to drive a corresponding degaussing coil array to generate a degaussing magnetic field. 4. The intelligent electromagnetic degaussing system based on target identification according to claim 3, wherein the medium identification module comprises: A classification and identification unit for classifying and identifying the electromagnetic induction signal by using a machine learning algorithm or an equation solving algorithm, and determining the material, shape, size and position of the magnetic storage medium; the machine learning algorithm is a decision tree algorithm , Bayesian algorithm, neural network algorithm or deep learning algorithm; the equation solving algorithm is a linear equation solving algorithm or a nonlinear equation solving algorithm. 5. The intelligent electromagnetic degaussing system based on target recognition according to claim 3, wherein the intelligent adjustment module comprises: The adjustment unit is configured to adopt a machine learning algorithm or an equation solving algorithm to determine the degaussing power according to the material, the shape and the size, and to determine the information of the degaussing coil array according to the position. 6 . The intelligent electromagnetic degaussing system based on target recognition according to claim 3 , wherein the main control chip further comprises a timing control module; the timing control module is used to control the medium identification module, all the The timing relationship between the intelligent adjustment module and the degaussing control module. 7 . The intelligent electromagnetic degaussing system based on target recognition according to claim 2 , wherein after the receiving circuit collects the electromagnetic induction signal, the degaussing coil array is disconnected from the transmitting circuit. 8 . 8 . The intelligent electromagnetic degaussing system based on target recognition according to claim 2 , wherein after the receiving circuit collects the electromagnetic induction signal, the degaussing coil array is electrically connected to the transmitting circuit. 9 . 9. An intelligent electromagnetic degaussing method based on target recognition, characterized in that, comprising: Control the degaussing coil array to transmit medium detection signal; acquiring the electromagnetic induction signal collected by the identification coil array; the electromagnetic induction signal is generated by the medium detection signal in the magnetic storage medium; classifying and identifying the electromagnetic induction signal, and determining the material, shape, size and position of the magnetic storage medium; The degaussing power is determined according to the material, the shape and the size, and the information of the degaussing coil array is determined according to the position; the degaussing coil array information includes the number, number and corresponding position of the degaussing coil array participating in the degaussing; According to the degaussing power and the information of the degaussing coil array, the corresponding degaussing coil array is controlled to generate a strong magnetic field required for degaussing the magnetic storage medium, so as to realize degaussing. 10 . The intelligent electromagnetic degaussing method based on target recognition according to claim 9 , wherein the electromagnetic induction signal is classified and identified, and the material, shape, size and size of the magnetic storage medium are determined. 11 . location, including: Use machine learning algorithm or equation solving algorithm to classify and identify the electromagnetic induction signal, and determine the material, shape, size and position of the magnetic storage medium; the machine learning algorithm is a decision tree algorithm, a Bayesian algorithm, A neural network algorithm or a deep learning algorithm; the equation solving algorithm is a linear equation solving algorithm or a nonlinear equation solving algorithm.

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