Disclosure of Invention
The application aims to provide a voltage source data real-time supervision system and method based on artificial intelligence so as to solve the problems in the background technology.
In order to solve the technical problems, the application provides the following technical scheme: the voltage source data real-time supervision method based on artificial intelligence comprises the following analysis steps:
step S1: acquiring historical state data recorded in a monitoring period corresponding to the implementation of the voltage source specification setting, wherein the monitoring period comprises a development setting period corresponding to the voltage source specification setting and an application monitoring period corresponding to the implementation of the application process, and the historical state data comprises reference voltage source parameter data of the development setting period and product abnormal response data recorded in the application monitoring period; based on the historical state data, constructing a feature set of an application environment in which the reference voltage source parameter data are located;
step S2: based on the feature set, analyzing application characteristic values corresponding to each parameter data of the reference voltage source;
step S3: comparing and analyzing feature sets corresponding to different reference voltage source parameters, extracting a plurality of reference voltage source parameters with the same application environment as a plurality of target parameters, and outputting the feature sets corresponding to the plurality of target parameters as target feature sets;
step S4: and acquiring application characteristic values corresponding to the multiple target parameters, and analyzing the reference priority of the multiple target parameters applied to the specification setting of the voltage source in the same application environment in the target characteristic set.
Further, in step S1, a feature set of an application environment where the reference voltage source parameter data is located is constructed, which includes the following analysis steps:
parameters which need to be considered in the development and setting period of the reference voltage source are obtained, wherein the parameters comprise initial precision, temperature coefficient, thermal hysteresis, long-term stability and low-frequency noise;
extracting reference voltage source data corresponding to any parameter value set in the historical data and other parameter value sets which are the same as target voltage source data, and acquiring physical environment characteristics of an application monitoring period of the target voltage source data, wherein the physical environment characteristics refer to phase characteristics of stable response generated by reference voltage source application after parameter setting is completed; the phase characteristics of the stable response are attribute characteristics of the corresponding phase when the abnormal response frequency of the target voltage source data is lowest in the application;
acquiring application environments corresponding to the phase characteristics meeting the stable response, wherein the application environments refer to application scenes in which the phase characteristics requirements of the same target voltage source data corresponding to the stable response exist;
constructing a feature set A, A { x, y, z } taking target voltage source data as a root node, physical environment features as a first child node and an application environment as a second child node; wherein x represents the corresponding target voltage source data after any parameter is set, y represents the physical environment characteristic corresponding to the target voltage source data, and z represents the application environment corresponding to the stage characteristic meeting the stable response; any parameter setting means that the parameter value settings are the same and the remaining parameter value settings are different.
The feature set is constructed because the initial design of the reference voltage source often needs to be manually combined with the application scene of the product and the specificity of the subsequent actual application scene, and the design of different parameters is used for solving different actual problems, so when the physical environment features corresponding to the different parameters are distinguished, the application environments corresponding to the different parameters are extracted through artificial intelligence on the premise of controlling the variables to be distinguished; the data can be effectively input into the system to effectively analyze the real-time data of the reference voltage source.
Further, the step S2 includes the following analysis steps:
acquiring product abnormal response data in an application monitoring period to which an ith parameter belongs, wherein the product abnormal response data comprises characteristics of abnormal response events and the occurrence number of the abnormal response events; the characteristics of the abnormal response event refer to the phase characteristics of the abnormal event which occur in the same kind of attribute as the physical environment characteristics;
the characteristic of the abnormal response event in the application monitoring period after the ith parameter setting is obtained is thatThe target event feature, when the target event feature is the same as the physical environment feature y corresponding to the first child node in the feature set to which the ith parameter belongs, the output feature value is U i The method comprises the steps of carrying out a first treatment on the surface of the When the target event feature is different from the physical environment feature y corresponding to the first child node in the i-th parameter corresponding feature set, outputting a feature value of V i The method comprises the steps of carrying out a first treatment on the surface of the Using the formula:
W i =U i *(g i1 /G i )+V i *(g i2 /G i )
calculating a first characteristic value W after the ith parameter setting in the application monitoring period i The method comprises the steps of carrying out a first treatment on the surface of the Wherein U is i >V i ,
g i1 The number of the events which exist when the target event characteristics are the same as the physical environment characteristics y corresponding to the first child node in the characteristic set to which the ith parameter belongs is represented;
g i2 representing the number of events in which the target event features and the physical environment features y corresponding to the first child node in the feature set to which the i-th parameter belongs are different;
G i indicating the total number of abnormal response events in the application monitoring period after the ith parameter is set;
the first characteristic value is a numerical value showing the characteristic of the parameter itself in the actual application by analyzing the physical environment characteristic and other physical environment characteristics corresponding to the parameter setting, and the larger the first characteristic value is, the larger the difficulty of setting and analyzing the analyzed parameter is;
the specific values of the other parameters corresponding to the i-th parameter after setting are obtained as oriented parameter values, the setting parameters are target parameters, the historical data corresponding to any identical oriented parameter values and different target parameter values are obtained as investigation parameter data, the abnormal response data of the investigation parameter data in the application monitoring period are obtained, and the formula is utilized:
Q i =|r i1 -r i2 |/r i0
calculating a second characteristic value Q after the ith parameter setting in the application monitoring period i ,
Wherein r is i1 To indicate that the application requirement is not satisfiedThe number of abnormal response events in the application monitoring period when the target parameter is set, r i2 Representing the occurrence number of abnormal response events in the application monitoring period when the target parameter setting corresponding to the application requirement is met, r i0 R represents i1 And r i2 Average value of (2); meeting the application requirement refers to setting a parameter value when the occurrence number of the abnormal response events is smaller than the abnormal event threshold value after setting the target parameter;
the second characteristic value reflects the deviation degree of the influence on the system under the condition of the same parameter setting and non-setting, and the larger the second characteristic value is, the larger the influence on the system is caused by the fact that the parameter setting is not finished, and the more important the parameter is;
using the formula: p (P) i =e 1 *W i +e 2 *Q i The method comprises the steps of carrying out a first treatment on the surface of the Calculating an application characteristic value P corresponding to the ith parameter of the reference voltage source i The method comprises the steps of carrying out a first treatment on the surface of the Wherein e 1 A reference coefficient, e, representing a first characteristic value 2 A reference coefficient representing a second characteristic value; e, e 1 +e 2 =1,0<e 1 、e 2 <1。
Further, step S3 includes the following analysis steps:
acquiring a feature set Ai { x, y, z } corresponding to the ith parameter;
extracting application environments in feature sets of m parameters as application environments to be analyzed, performing intersection analysis on the application environments to be analyzed to generate a first set, wherein the intersection analysis generates the first set as { z } 1 ∩z 2 ,z 1 ∩z 2 ∩z 3 ,......,z m-1 ∩z m -a }; wherein z is 1 、z 2 、......、z m Express application environments to be analyzed corresponding to the 1 st, 2 nd..third..m. parameters; intersection analysis is a combination of any parameter corresponding to the application environment to be analyzed; the first set is a set formed by all combinations;
extracting parameters corresponding to the intersection analysis result which is not the empty set as multiple target parameters;
and outputting the feature set corresponding to the multiple target parameters as a target feature set.
The analysis target feature set indicates that a plurality of parameters to be set exist in the same application environment.
Further, the step S4 includes the following analysis steps:
acquiring a j-th multi-element target parameter contained in the same application environment, and extracting an application characteristic value corresponding to the multi-element target parameter;
when the application characteristic values are different, sorting the multiple target parameters from large to small according to the numerical values of the application characteristic values to generate reference priority;
when the application characteristic values are the same, acquiring a characteristic set to which the same application characteristic value corresponds to a multi-element target parameter, and extracting a duration proportion of an existing application monitoring period of physical environment characteristics in the characteristic set, wherein the duration proportion refers to a ratio of response duration corresponding to the physical environment characteristics to total duration of the application monitoring period; and sequencing the multiple target parameters corresponding to the same application characteristic value from large to small according to the duration proportion value to generate the reference priority.
Priority when multiple parameters are required to be set in the same application environment are analyzed, and the system analysis parameter organization and resource reasonable allocation by artificial intelligence are facilitated.
The voltage source data real-time supervision system comprises a historical state database module, a feature set construction module, an application characteristic value analysis module, a multi-element target parameter determination module and a reference priority analysis module;
the historical state database module is used for acquiring historical state data recorded in a period from the completion of the specification setting of the voltage source to the implementation of the application corresponding monitoring;
the characteristic set construction module is used for constructing a characteristic set of an application environment where the reference voltage source parameter data are based on the historical state data;
the application characteristic value analysis module is used for analyzing application characteristic values corresponding to the parameter data of the reference voltage source;
the multi-element target parameter determining module is used for carrying out comparison analysis on feature sets corresponding to different reference voltage source parameters, and extracting a plurality of reference voltage source parameters with the same application environment as multi-element target parameters;
the reference priority analysis module is used for acquiring application characteristic values corresponding to the multiple target parameters, and analyzing the reference priority of the same application environment in the target feature set, which is applied to the specification setting of the reference voltage source, of the multiple target parameters.
Further, the feature set construction module comprises a reference data determination unit, a target voltage source data determination unit, a physical environment feature determination unit, an application environment determination unit and a feature set output unit;
the reference data determining unit is used for obtaining parameters which are required to be considered by the reference voltage source in a development and setting period, wherein the parameters comprise initial precision, temperature coefficient, thermal hysteresis, long-term stability and low-frequency noise;
the target voltage source data determining unit is used for extracting reference voltage source data corresponding to any parameter value set in the historical data which is the same and the other parameter value sets are different as target voltage source data;
the physical environment characteristic determining unit is used for obtaining physical environment characteristics of the application monitoring period where the target voltage source data are located;
the application environment determining unit is used for obtaining an application environment corresponding to the phase characteristics meeting the stable response;
the feature set output unit is used for constructing a feature set which takes target voltage source data as a root node, physical environment features as a first sub-node and application environment as a second sub-node.
Further, the application characteristic value analysis module comprises a first characteristic value calculation unit, a second characteristic value calculation unit and an application characteristic value calculation unit;
the first characteristic value calculation unit is used for calculating a first characteristic value based on the number of the events when the target event features correspond to the physical environment features in the feature set;
the second characteristic value calculation unit is used for calculating a second characteristic value based on the number of events when the target parameter corresponds to the physical environment characteristic in the characteristic set;
the application characteristic value calculation unit is used for calculating an output application characteristic value based on the first characteristic value and the second characteristic value.
Further, the reference priority analysis module comprises a parameter sequencing unit, a duration proportion analysis unit and a priority output unit;
the parameter sorting unit is used for sorting the multiple target parameters from large to small according to the magnitude of the application characteristic value;
the time length proportion analysis unit is used for analyzing the time length proportion of the existing application monitoring period of the physical environment characteristics in the characteristic set when the application characteristic values are the same, so as to determine the sequence;
the priority output unit is used for outputting the reference priority based on the parameter ranking result and the ranking result determined by the duration proportion analysis unit.
Compared with the prior art, the application has the following beneficial effects: according to the application, the historical state data recorded in the corresponding monitoring period from the completion of the specification setting of the voltage source to the implementation and application is divided through artificial intelligence, the parameters required to be considered in the reference voltage source setting are taken as root nodes to construct a feature set, and the application environments corresponding to different parameters are extracted and distinguished through artificial intelligence on the premise of controlling variables; the data can be effectively input into the system to effectively analyze the real-time data of the reference voltage source; the system can rapidly position the parameter data and the corresponding physical environment characteristics and application scenes; in addition, after the feature set is analyzed, the application characteristic values of different parameters are digitized, and the setting priority of the parameters under the condition that various parameters exist in the historical data are considered is analyzed; the system analysis parameters are organized by the artificial intelligence, and the resources are reasonably allocated; manual calculation force is reduced, so that system analysis is more intelligent.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, the present application provides the following technical solutions: the voltage source data real-time supervision method based on artificial intelligence comprises the following analysis steps:
step S1: acquiring historical state data recorded in a monitoring period corresponding to the implementation of the voltage source specification setting, wherein the monitoring period comprises a development setting period corresponding to the voltage source specification setting and an application monitoring period corresponding to the implementation of the application process, and the historical state data comprises reference voltage source parameter data of the development setting period and product abnormal response data recorded in the application monitoring period; based on the historical state data, constructing a feature set of an application environment in which the reference voltage source parameter data are located;
step S2: based on the feature set, analyzing application characteristic values corresponding to each parameter data of the reference voltage source; the application characteristic value refers to the importance degree, stability and precision of the data of different parameters of the reference voltage source;
step S3: comparing and analyzing feature sets corresponding to different reference voltage source parameters, extracting a plurality of reference voltage source parameters with the same application environment as a plurality of target parameters, and outputting the feature sets corresponding to the plurality of target parameters as target feature sets;
step S4: and acquiring application characteristic values corresponding to the multiple target parameters, and analyzing the reference priority of the multiple target parameters applied to the specification setting of the voltage source in the same application environment in the target characteristic set.
In step S1, a feature set of an application environment where the reference voltage source parameter data is located is constructed, which includes the following analysis steps:
parameters which need to be considered in the development and setting period of the reference voltage source are obtained, wherein the parameters comprise initial precision, temperature coefficient, thermal hysteresis, long-term stability and low-frequency noise;
extracting reference voltage source data corresponding to any parameter value set in the historical data and other parameter value sets which are the same as target voltage source data, and acquiring physical environment characteristics of an application monitoring period of the target voltage source data, wherein the physical environment characteristics refer to phase characteristics of stable response generated by reference voltage source application after parameter setting is completed; the phase characteristics of the stable response are attribute characteristics of the corresponding phase when the abnormal response frequency of the target voltage source data is lowest in the application;
acquiring application environments corresponding to the phase characteristics meeting the stable response, wherein the application environments refer to application scenes in which the phase characteristics requirements of the same target voltage source data corresponding to the stable response exist;
constructing a feature set A, A { x, y, z } taking target voltage source data as a root node, physical environment features as a first child node and an application environment as a second child node; wherein x represents the corresponding target voltage source data after any parameter is set, y represents the physical environment characteristic corresponding to the target voltage source data, and z represents the application environment corresponding to the stage characteristic meeting the stable response; any parameter setting means that the parameter value settings are the same and the remaining parameter value settings are different.
If the factor considered when setting the standard of the reference voltage source is a temperature coefficient, and the stage with the lowest abnormal response frequency in the practical application after the setting of the reference voltage source is that the system experiences low temperature, the physical environment characteristic corresponding to the temperature coefficient is a low-temperature attribute characteristic; the corresponding application environment may be a factory automation control application and wherein the environment may deviate from a scenario corresponding to a comfortable room temperature setting.
The feature set is constructed because the initial design of the reference voltage source often needs to be manually combined with the application scene of the product and the specificity of the subsequent actual application scene, and the design of different parameters is used for solving different actual problems, so when the physical environment features corresponding to the different parameters are distinguished, the application environments corresponding to the different parameters are extracted through artificial intelligence on the premise of controlling the variables to be distinguished; the data can be effectively input into the system to effectively analyze the real-time data of the reference voltage source.
The step S2 includes the following analysis steps:
acquiring product abnormal response data in an application monitoring period to which an ith parameter belongs, wherein the product abnormal response data comprises characteristics of abnormal response events and the occurrence number of the abnormal response events; the characteristics of the abnormal response event refer to the phase characteristics of the abnormal event which occur in the same kind of attribute as the physical environment characteristics; if the physical environment feature corresponding to the analysis setting parameter is a low-temperature attribute feature, the stage feature of the same type attribute as the physical environment feature, i.e. the low-temperature attribute feature, can be a high-temperature attribute feature, a low-noise attribute feature, a long-term drift attribute feature, and the like;
acquiring an abnormal response event characteristic as a target event characteristic in an application monitoring period after setting an ith parameter, and outputting a characteristic value as U when the target event characteristic is the same as a physical environment characteristic y corresponding to a first child node in a characteristic set to which the ith parameter belongs i The method comprises the steps of carrying out a first treatment on the surface of the When the target event feature is different from the physical environment feature y corresponding to the first child node in the i-th parameter corresponding feature set, outputting a feature value of V i The method comprises the steps of carrying out a first treatment on the surface of the Using the formula:
W i =U i *(g i1 /G i )+V i *(g i2 /G i )
calculating a first characteristic value W after the ith parameter setting in the application monitoring period i The method comprises the steps of carrying out a first treatment on the surface of the Wherein U is i >V i ,
g i1 The number of the events which exist when the target event characteristics are the same as the physical environment characteristics y corresponding to the first child node in the characteristic set to which the ith parameter belongs is represented;
g i2 representing the number of events in which the target event features and the physical environment features y corresponding to the first child node in the feature set to which the i-th parameter belongs are different;
G i indicating the total number of abnormal response events in the application monitoring period after the ith parameter is set;
the first characteristic value is a numerical value showing the characteristic of the parameter itself in the actual application by analyzing the physical environment characteristic and other physical environment characteristics corresponding to the parameter setting, and the larger the first characteristic value is, the larger the difficulty of setting and analyzing the analyzed parameter is;
the specific values of the other parameters corresponding to the i-th parameter after setting are obtained as oriented parameter values, the setting parameters are target parameters, the historical data corresponding to any identical oriented parameter values and different target parameter values are obtained as investigation parameter data, the abnormal response data of the investigation parameter data in the application monitoring period are obtained, and the formula is utilized:
Q i =|r i1 -r i2 |/r i0
calculating a second characteristic value Q after the ith parameter setting in the application monitoring period i ,
Wherein r is i1 Indicating the occurrence number of abnormal response events in the application monitoring period when the target parameter setting corresponding to the application requirement is not met, r i2 Representing the occurrence number of abnormal response events in the application monitoring period when the target parameter setting corresponding to the application requirement is met, r i0 R represents i1 And r i2 Average value of (2); meeting the application requirement refers to setting a parameter value when the occurrence number of the abnormal response events is smaller than the abnormal event threshold value after setting the target parameter;
the second characteristic value reflects the deviation degree of the influence on the system under the condition of the same parameter setting and non-setting, and the larger the second characteristic value is, the larger the influence on the system is caused by the fact that the parameter setting is not finished, and the more important the parameter is;
using the formula: p (P) i =e 1 *W i +e 2 *Q i The method comprises the steps of carrying out a first treatment on the surface of the Calculating an application characteristic value P corresponding to the ith parameter of the reference voltage source i The method comprises the steps of carrying out a first treatment on the surface of the Wherein e 1 A reference coefficient, e, representing a first characteristic value 2 A reference coefficient representing a second characteristic value; e, e 1 +e 2 =1,0<e 1 、e 2 <1。
Step S3 comprises the following analysis steps:
acquiring a feature set Ai { x, y, z } corresponding to the ith parameter;
extracting application environments in the feature set of m parameters as application environments to be analyzed, and waiting for analysisAnalyzing the application environment to generate a first set by intersection analysis, wherein the first set is { z }, and 1 ∩z 2 ,z 1 ∩z 2 ∩z 3 ,......,z m-1 ∩z m -a }; wherein z is 1 、z 2 、......、z m Express application environments to be analyzed corresponding to the 1 st, 2 nd..third..m. parameters; intersection analysis is a combination of any parameter corresponding to the application environment to be analyzed; the first set is a set formed by all combinations;
if there are 3 parameters, intersection analysis can be performed as: z 1 ∩z 2 ,z 1 ∩z 3 ,z 2 ∩z 3 ,z 1 ∩z 2 ∩z 3 ;
Extracting parameters corresponding to the intersection analysis result which is not the empty set as multiple target parameters;
and outputting the feature set corresponding to the multiple target parameters as a target feature set.
The analysis target feature set indicates that a plurality of parameters to be set exist in the same application environment.
The step S4 includes the following analysis steps:
acquiring a j-th multi-element target parameter contained in the same application environment, and extracting an application characteristic value corresponding to the multi-element target parameter;
when the application characteristic values are different, sorting the multiple target parameters from large to small according to the numerical values of the application characteristic values to generate reference priority;
when the application characteristic values are the same, acquiring a characteristic set to which the same application characteristic value corresponds to a multi-element target parameter, and extracting a duration proportion of an existing application monitoring period of physical environment characteristics in the characteristic set, wherein the duration proportion refers to a ratio of response duration corresponding to the physical environment characteristics to total duration of the application monitoring period; and sequencing the multiple target parameters corresponding to the same application characteristic value from large to small according to the duration proportion value to generate the reference priority.
As shown in the examples: when the application characteristic values are all 0.5, and the multi-element target parameters are respectively low-frequency noise and thermal stagnation, extracting the physical environment characteristics corresponding to the low-frequency noise as low-noise characteristics, and the physical environment characteristics corresponding to the thermal stagnation as cycle height Wen Tezheng; and the duration of the low-frequency noise corresponding to the application monitoring period is 2h, the duration of the thermal hysteresis corresponding to the application monitoring period is 3h, and the total duration of the application monitoring period is 12h, 3/12>2/12, and the reference priority of the output thermal hysteresis parameter setting is larger than the low-frequency noise.
Priority when multiple parameters are required to be set in the same application environment are analyzed, and the system analysis parameter organization and resource reasonable allocation by artificial intelligence are facilitated.
The voltage source data real-time supervision system comprises a historical state database module, a feature set construction module, an application characteristic value analysis module, a multi-element target parameter determination module and a reference priority analysis module;
the historical state database module is used for acquiring historical state data recorded in a period from the completion of the specification setting of the voltage source to the implementation of the application corresponding monitoring;
the characteristic set construction module is used for constructing a characteristic set of an application environment where the reference voltage source parameter data are based on the historical state data;
the application characteristic value analysis module is used for analyzing application characteristic values corresponding to the parameter data of the reference voltage source;
the multi-element target parameter determining module is used for carrying out comparison analysis on feature sets corresponding to different reference voltage source parameters, and extracting a plurality of reference voltage source parameters with the same application environment as multi-element target parameters;
the reference priority analysis module is used for acquiring application characteristic values corresponding to the multiple target parameters, and analyzing the reference priority of the same application environment in the target feature set, which is applied to the specification setting of the reference voltage source, of the multiple target parameters.
The feature set construction module comprises a reference data determination unit, a target voltage source data determination unit, a physical environment feature determination unit, an application environment determination unit and a feature set output unit;
the reference data determining unit is used for obtaining parameters which are required to be considered by the reference voltage source in a development and setting period, wherein the parameters comprise initial precision, temperature coefficient, thermal hysteresis, long-term stability and low-frequency noise;
the target voltage source data determining unit is used for extracting reference voltage source data corresponding to any parameter value set in the historical data which is the same and the other parameter value sets are different as target voltage source data;
the physical environment characteristic determining unit is used for obtaining physical environment characteristics of the application monitoring period where the target voltage source data are located;
the application environment determining unit is used for obtaining an application environment corresponding to the phase characteristics meeting the stable response;
the feature set output unit is used for constructing a feature set which takes target voltage source data as a root node, physical environment features as a first sub-node and application environment as a second sub-node.
The application characteristic value analysis module comprises a first characteristic value calculation unit, a second characteristic value calculation unit and an application characteristic value calculation unit;
the first characteristic value calculation unit is used for calculating a first characteristic value based on the number of the events when the target event features correspond to the physical environment features in the feature set;
the second characteristic value calculation unit is used for calculating a second characteristic value based on the number of events when the target parameter corresponds to the physical environment characteristic in the characteristic set;
the application characteristic value calculation unit is used for calculating an output application characteristic value based on the first characteristic value and the second characteristic value.
The reference priority analysis module comprises a parameter sequencing unit, a duration proportion analysis unit and a priority output unit;
the parameter sorting unit is used for sorting the multiple target parameters from large to small according to the magnitude of the application characteristic value;
the time length proportion analysis unit is used for analyzing the time length proportion of the existing application monitoring period of the physical environment characteristics in the characteristic set when the application characteristic values are the same, so as to determine the sequence;
the priority output unit is used for outputting the reference priority based on the parameter ranking result and the ranking result determined by the duration proportion analysis unit.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present application, and the present application is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present application has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.