Disclosure of Invention
The invention provides an intelligent data interaction method based on parent-child education, which is used for generating shared data nodes through a data interaction protocol and accurately realizing the interaction of intelligent data, thereby improving the efficiency of intelligent data interaction.
An intelligent data interaction method based on parent-child education comprises the following steps:
step 1: acquiring a data interaction protocol of parent-child education software, and establishing a connection relation between the parent-child education software and a cloud server based on the data interaction protocol;
step 2: generating a shared data node based on the connection relation, and simultaneously displaying the working mode of parent-child education software to the user side through a cloud server based on the shared data node;
and step 3: according to the working mode of the parent-child education software, a user sends an interaction request instruction to the cloud server based on an interaction signal identification sequence of a user side;
and 4, step 4: and matching a target working mode corresponding to the parent-child education software according to the interaction request instruction, and transmitting the target working mode to a data interaction interface for operation and display.
In a possible implementation manner, in step 1, the specific work process of acquiring the data interaction protocol of the parent-child education software includes:
acquiring interactive information to be interacted by the parent-child education software, and analyzing the interactive information and acquiring an analysis result;
acquiring the identification characters of the interactive information based on the analysis result, and matching a protocol acquisition file corresponding to the interactive information;
determining a data interaction protocol object corresponding to the interaction information according to the identification character of the interaction information, and acquiring protocol object data of the data interaction protocol object;
acquiring the data type of the protocol object data, acquiring digital characters corresponding to the data type, and taking the digital characters as input parameters of the protocol acquisition file;
and acquiring the data interaction protocol in the protocol acquisition file according to the input parameters of the protocol acquisition file.
In a possible implementation manner, in step 1, a specific work process of establishing a connection relationship between the parent-child education software and a cloud server based on the data interaction protocol includes:
acquiring a connection character string of the data interaction protocol, and sending a connection request to the cloud server based on the connection character string;
acquiring a request instruction of the connection request, and carrying out security detection on the request instruction based on a detection window of the cloud server;
when the request instruction passes the security detection, the cloud server generates a corresponding response instruction based on the request instruction;
acquiring a target address connected with the cloud server based on the response instruction, and acquiring a first character and a tail character of the target address;
generating an address matching identification based on the first character and the tail character of the target address;
and establishing a connection relation between the data interaction protocol and the cloud server according to the address matching identification.
In a possible implementation manner, a specific working process of performing security detection on the request instruction based on a detection window of the cloud server includes:
acquiring attribute information of the detection window, and acquiring the instruction type of the request instruction;
judging whether the instruction type of the request instruction is compatible with the detection window or not according to the attribute information of the detection window;
if the instruction type of the request instruction is compatible with the detection window, acquiring an instruction code of the request instruction according to a detection sequence of the detection window;
acquiring a code identifier corresponding to the instruction code of the request instruction, and generating a corresponding code traversal algorithm according to the code identifier;
traversing the instruction codes of the request instruction based on the code traversal algorithm, and judging whether the instruction codes of the request instruction have instruction codes for changing instruction meanings;
if yes, judging that the current request instruction is an illegal instruction, meanwhile, generating an illegal instruction report aiming at the illegal instruction, uploading the illegal instruction report to an instruction processing window of the cloud server, and deleting the request instruction;
otherwise, the request instruction passes the security detection.
In a possible implementation manner, in step 2, a shared data node is generated based on the connection relationship, and meanwhile, a specific working process of a working mode of parent-child education software is displayed to a user terminal through a cloud server based on the shared data node includes:
constructing an interactive block chain network for the parent-child education software to interact with the user based on the connection relation;
acquiring a network address of the interactive block chain network, and determining a node address of the shared data node based on the network address;
according to the node address, determining the area information of the shared data node and generating a node identifier;
obtaining the shared data node based on the area information of the shared data node and the generation node identifier;
and transmitting the shared data node to the cloud server for analysis and processing, determining the working mode of the parent-child education software based on the processing result, and displaying the working mode to a user side.
In a possible implementation manner, step 2 further includes: when detecting that the data interaction protocol of the parent-child education software is updated, synchronizing and updating the shared data nodes, wherein the specific working process comprises the following steps:
acquiring the change data of the data interaction protocol, analyzing the change data and generating an update file based on the analysis result;
updating the data interaction protocol based on the update file, generating a new data interaction protocol, and meanwhile, establishing a new connection relationship between the parent-child education software and the cloud server based on the new data interaction protocol;
acquiring a connection identifier of the new connection relation;
establishing a conversion function between the current shared data node and the shared data node based on the connection identifier;
acquiring key data of the connection identifier, and taking the key data as a synchronous updating parameter of the conversion function;
and synchronizing the shared data nodes based on the synchronous updating parameters, and finishing updating the shared data nodes according to the conversion function.
In a possible implementation manner, in step 3, according to the working mode of the parent-child education software, the specific working process in which the user sends the interaction request instruction to the cloud server based on the interaction signal identification sequence of the user side includes:
extracting text vocabularies corresponding to the working modes of the parent-child education software, reading the text vocabularies, and judging whether the read text vocabularies are logical operators or not;
if the text vocabulary is a logical operator, analyzing the text vocabulary expression according to the logical operator;
acquiring mode semantics of a working mode of the parent-child education software according to the text vocabulary expression, digitizing the mode semantics to acquire a number sequence corresponding to the working mode, and generating a matching data table based on the number sequence;
performing channel coding pretreatment on the interactive signal identification sequence, and performing segmentation treatment on the treated interactive signal identification sequence according to a preset mode to obtain a sub-interactive signal identification sequence;
respectively modulating the sub-interactive signal identification sequences to obtain sub-interactive signals, and simultaneously obtaining signal broadband of the sub-interactive signals;
filtering the sub interactive signals based on the signal broadband of the sub interactive signals, and synthesizing the filtered sub interactive signals to obtain interactive request signals;
matching the interactive request signal with the digital serial number corresponding to the working mode in the matching data table;
if the interaction request signal is successfully matched with the target digital serial number, acquiring the target digital serial number matched with the interaction request signal;
generating an interactive request instruction based on the interactive request signal and the target digital serial number, and simultaneously reading a first address of an instruction line of the interactive request instruction according to a preset address fetching mode;
matching the first address of the instruction line with the reading address of the cloud server;
and if the matching is successful, sending the interaction request instruction to the cloud server.
In a possible implementation manner, in step 4, the specific working process of the target working mode corresponding to the parent-child education software according to the interaction request instruction includes:
determining the protocol type of the interactive request instruction according to the interactive request instruction, and generating a corresponding instruction processing protocol according to the protocol type;
and performing instruction processing on the interaction request instruction based on the instruction processing protocol, reading based on the processed interaction request instruction, and matching a target working mode corresponding to the parent-child education software according to the reading result.
In a possible implementation manner, in step 4, the method further includes:
obtaining a matching factor for matching the interaction request instruction with a target working mode corresponding to the parent-child education software, calculating the matching accuracy of the interaction request instruction and the target working mode according to the matching factor, and meanwhile, calculating the specific working process of the matching efficiency of the interaction request instruction and the target working mode according to the matching time and the matching accuracy of the interaction request instruction and the target working mode, wherein the specific working process comprises the following steps:
acquiring a matching factor of the interaction request instruction and the target working mode based on the parent-child education software;
calculating the matching accuracy of the interaction request instruction and the target working mode according to the matching factor;
wherein Z represents the matching accuracy of the interactive request instruction and the target working mode; lambda represents a matching factor and has a value range of (0.2, 0.5); mu represents the matching degree of the data corresponding to the interaction request instruction and the data corresponding to the target working mode; xi represents an error coefficient of the matching degree of the data corresponding to the interactive request instruction and the data corresponding to the target working mode, and the value range is (0.1, 0.3); x is the number of1Representing the effective execution efficiency of the interactive request instruction; x is the number of2Represents the instruction execution efficiency of the interactive request instruction, and x1>x2;
Acquiring the matching time of the interactive request instruction and the target working mode, and meanwhile, calculating the matching efficiency of the interactive request instruction and the target working mode based on the matching accuracy of the request instruction and the target working mode;
wherein eta represents the matching efficiency of the interaction request instruction and the target working mode; z represents the matching accuracy of the interaction request instruction and the target working mode; t represents the matching time of the interaction request instruction and the target working mode; lambda represents a matching factor and has a value range of (0.2, 0.5); t represents the ideal matching time; delta represents the reading time of the interactive request instruction; h represents the preset length of the interactive request instruction; v represents the speed of reading the interactive request command; z 'represents the preset accuracy of the interaction request instruction and the target working mode, and the value range is [0.9, 1], and Z' is more than Z;
analyzing the matching efficiency of the interaction request instruction and a target working mode, and acquiring the qualification rate of intelligent data interaction of the parent-child education software;
comparing the qualification rate of the intelligent data interaction of the parent-child education software with a reference qualification rate;
if the qualification rate of the intelligent data interaction of the parent-child education software meets the reference qualification rate, the parent-child education software does not need to carry out efficiency optimization;
otherwise, efficiency optimization is carried out on the parent-child education software until the qualification rate of intelligent data interaction of the parent-child education software meets the standard qualification rate.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1:
the embodiment provides an intelligent data interaction method based on parent-child education, as shown in fig. 1, including:
step 1: acquiring a data interaction protocol of parent-child education software, and establishing a connection relation between the parent-child education software and a cloud server based on the data interaction protocol;
step 2: generating a shared data node based on the connection relation, and simultaneously displaying the working mode of parent-child education software to the user side through a cloud server based on the shared data node;
and step 3: according to the working mode of the parent-child education software, a user sends an interaction request instruction to the cloud server based on an interaction signal identification sequence of a user side;
and 4, step 4: and matching a target working mode corresponding to the parent-child education software according to the interaction request instruction, and transmitting the target working mode to a data interaction interface for operation and display.
In this embodiment, the shared data node may be a node formed by sharing data between the parent-child education software and the cloud server.
In the embodiment, the working modes comprise a plurality of working modes such as exploring a 3D seabed world in a game mode, popular science animation, human online knowledge competition, Chinese-English bilingual explanation and the like.
In this embodiment, the target operation mode is one of the operation modes, and is subordinate to the operation mode.
In this embodiment, the interactive signal identification sequence may be for generating an interactive request command to match the operation mode.
In this embodiment, the data interaction protocol may be preset.
The beneficial effects of the above technical scheme are: the method is beneficial to obtaining the shared data nodes by obtaining the data interaction protocol, and the intelligent data interaction method for parent-child education is realized by selecting the working mode through the interaction request instruction, so that the accuracy and the efficiency of intelligent interaction are improved.
Example 2:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parent-child education, and in step 1, a specific working process of obtaining a data interaction protocol of parent-child education software includes:
acquiring interactive information to be interacted by the parent-child education software, and analyzing the interactive information and acquiring an analysis result;
acquiring the identification characters of the interactive information based on the analysis result, and matching a protocol acquisition file corresponding to the interactive information;
determining a data interaction protocol object corresponding to the interaction information according to the identification character of the interaction information, and acquiring protocol object data of the data interaction protocol object;
acquiring the data type of the protocol object data, acquiring digital characters corresponding to the data type, and taking the digital characters as input parameters of the protocol acquisition file;
and acquiring the data interaction protocol in the protocol acquisition file according to the input parameters of the protocol acquisition file.
In this embodiment, the interactive information may be information that the user wants the selected work mode to be turned on together with the achievement target work mode of the parent-child education software.
In this embodiment, the identification character of the interactive information may be determined by a keyword or a key character of the interactive information, for example, the identification character of the interactive information is "game" or "chinese-english explanation" or the like.
In this embodiment, the data type of the protocol object data may be int type, float type, or String type.
In this embodiment, the numeric characters corresponding to the data types are, for example, int type corresponding to numeral 1, float type corresponding to numeral 2, String type corresponding to numeral 3, and the like.
The beneficial effects of the above technical scheme are: the interactive information acquisition protocol acquisition file is used for acquiring the protocol, and the data interaction protocol is accurately generated by acquiring the protocol object data and the parameters, so that the accuracy of the data interaction protocol is improved, and convenience is brought to intelligent data interaction of parent-child education.
Example 3:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parentage education, and in step 1, a specific working process of establishing a connection relationship between parentage education software and a cloud server based on the data interaction protocol includes:
acquiring a connection character string of the data interaction protocol, and sending a connection request to the cloud server based on the connection character string;
acquiring a request instruction of the connection request, and carrying out security detection on the request instruction based on a detection window of the cloud server;
when the request instruction passes the security detection, the cloud server generates a corresponding response instruction based on the request instruction;
acquiring a target address connected with the cloud server based on the response instruction, and acquiring a first character and a tail character of the target address;
generating an address matching identification based on the first character and the tail character of the target address;
and establishing a connection relation between the data interaction protocol and the cloud server according to the address matching identification.
In this embodiment, the first character and the last character of the target address are obtained to generate an address matching identifier.
The beneficial effects of the above technical scheme are: by acquiring the request instruction and carrying out security detection, the connection security is improved, and the connection between the data interaction protocol and the cloud server is accurately established based on the address matching identification of the response instruction, so that parent-child interaction is facilitated.
Example 4:
on the basis of embodiment 3, this embodiment provides an intelligent data interaction method based on parent-child education, and a specific working process of performing security detection on the request instruction based on a detection window of the cloud server includes:
acquiring attribute information of the detection window, and acquiring the instruction type of the request instruction;
judging whether the instruction type of the request instruction is compatible with the detection window or not according to the attribute information of the detection window;
if the instruction type of the request instruction is compatible with the detection window, acquiring an instruction code of the request instruction according to a detection sequence of the detection window;
acquiring a code identifier corresponding to the instruction code of the request instruction; meanwhile, generating a corresponding code traversal algorithm according to the code identifier;
traversing the instruction codes of the request instruction based on the code traversal algorithm, and judging whether the instruction codes of the request instruction have instruction codes for changing instruction meanings;
if yes, judging that the current request instruction is an illegal instruction, meanwhile, generating an illegal instruction report aiming at the illegal instruction, uploading the illegal instruction report to an instruction processing window of the cloud server, and deleting the request instruction;
otherwise, the request instruction passes the security detection.
In this embodiment, the attribute information of the detection window is formed by each character string identifier, and includes: name attribute, capture attribute, etc.
In this embodiment, the instruction type may be a shift operation instruction, a floating point operation instruction, a string processing instruction, or the like.
In this embodiment, the step of determining whether the instruction type of the request instruction is compatible with the detection window according to the attribute information of the detection window may be, for example, a step of processing a character string by detecting that the attribute information of the detection window is an instruction for processing a character string, and thus, only the character string processing instruction is compatible with the window at this time.
In this embodiment, the code designator may be a letter, a number, or an underline.
The beneficial effects of the above technical scheme are: the compatibility of the inspection window and the request instruction is judged, so that the safety is increased, the instruction codes with changed instruction meanings are screened out by traversing the instruction codes, the safety of the request instruction is improved, the system is protected from being attacked, and the reliability of parent-child interaction is ensured.
Example 5:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parent-child education, in step 2, a shared data node is generated based on the connection relationship, and meanwhile, a specific working process of a working mode of parent-child education software is displayed to a user side through a cloud server based on the shared data node, which includes:
constructing an interactive block chain network for the parent-child education software to interact with the user based on the connection relation;
acquiring a network address of the interactive block chain network, and determining a node address of the shared data node based on the network address;
according to the node address, determining the area information of the shared data node and generating a node identifier;
obtaining the shared data node based on the area information of the shared data node and the generation node identifier;
and transmitting the shared data node to the cloud server for analysis and processing, determining the working mode of the parent-child education software based on the processing result, and displaying the working mode to a user.
The beneficial effects of the above technical scheme are: the acquisition of the node address of the shared data node is facilitated by acquiring the block chain network, and the accurate application of the node identifier to the shared data node is facilitated, so that the working mode of parent-child education software can be efficiently and accurately acquired.
Example 6:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parent-child education, and in step 2, the method further includes: when detecting that the data interaction protocol of the parent-child education software is updated, synchronizing and updating the shared data nodes, wherein the specific working process comprises the following steps:
acquiring the change data of the data interaction protocol, analyzing the change data and generating an update file based on the analysis result;
updating the data interaction protocol based on the update file, generating a new data interaction protocol, and meanwhile, establishing a new connection relationship between the parent-child education software and the cloud server based on the new data interaction protocol;
acquiring a connection identifier of the new connection relation;
establishing a conversion function between the current shared data node and the shared data node based on the connection identifier;
acquiring key data of the connection identifier, and taking the key data as a synchronous updating parameter of the conversion function;
and synchronizing the shared data nodes based on the synchronous updating parameters, and finishing updating the shared data nodes according to the conversion function.
In this embodiment, the key data of the connection identifier may be, for example, a data segment associated with the cloud server based on a new data interaction protocol.
In this embodiment, the case where the data interaction protocol is updated may be when the game is optimized or updated, or when a new education item exists in the parent-child education software, or the like.
The beneficial effects of the above technical scheme are: when the data interaction protocol is updated, the shared data nodes are synchronized and updated in time, and the real-time performance of intelligent data interaction is improved.
Example 7:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parentage education, and in step 3, according to the working mode of the parentage education software, a specific working process in which a user sends an interaction request instruction to the cloud server based on an interaction signal identification sequence of a user side includes:
extracting text vocabularies corresponding to the working modes of the parent-child education software, reading the text vocabularies, and judging whether the read text vocabularies are logical operators or not;
if the text vocabulary is a logical operator, analyzing the text vocabulary expression according to the logical operator;
acquiring mode semantics of a working mode of the parent-child education software according to the text vocabulary expression, digitizing the mode semantics to acquire a number sequence corresponding to the working mode, and generating a matching data table based on the number sequence;
performing channel coding pretreatment on the interactive signal identification sequence, and performing segmentation treatment on the treated interactive signal identification sequence according to a preset mode to obtain a sub-interactive signal identification sequence;
respectively modulating the sub-interactive signal identification sequences to obtain sub-interactive signals, and simultaneously obtaining signal broadband of the sub-interactive signals;
filtering the sub interactive signals based on the signal broadband of the sub interactive signals, and synthesizing the filtered sub interactive signals to obtain interactive request signals;
matching the interactive request signal with the digital serial number corresponding to the working mode in the matching data table;
if the interaction request signal is successfully matched with the target digital serial number, acquiring the target digital serial number matched with the interaction request signal;
generating an interactive request instruction based on the interactive request signal and the target digital serial number, and simultaneously reading a first address of an instruction line of the interactive request instruction according to a preset address fetching mode;
matching the first address of the instruction line with the reading address of the cloud server;
and if the matching is successful, sending the interaction request instruction to the cloud server.
In this embodiment, the text vocabulary may be a certain data segment in the script file in the working mode, so as to achieve the effect of reading the working mode.
In this embodiment, the logical operator may be an and logical operator, an xor logical operator, and the like.
In this embodiment, the text vocabulary expression is for obtaining the schema semantics of the working schema.
In this embodiment, the preset mode may be a preset mode for segmenting the interactive signal identifier sequence.
In this embodiment, the number numbers can be expressed as decimal values, and the matching data table is composed of the corresponding number numbers based on all the patterns.
In this embodiment, the sub interactive signal identifier sequence is obtained to accurately obtain the corresponding sub interactive signal, and it is also convenient to perform filtering processing on the sub interactive signal.
In this embodiment, the first address of the interactive request instruction is conveniently matched with the read address of the cloud server.
In this embodiment, the channel coding preprocessing is performed on the interactive signal identifier sequence in order to encode the interactive signal identifier sequence and perform the segmentation processing.
The beneficial effects of the above technical scheme are: the mode semantic digitization is favorable for accurately acquiring the digital serial number of the working mode, so that a matching data table is accurately generated, the sub-interactive signals are subjected to filtering processing, accurate interactive request signals are acquired, and the interactive request signals are matched with the matching data table, so that the interactive request instructions are safely and accurately sent to the cloud server.
Example 8:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parent-child education, and in step 4, according to the interaction request instruction, a specific working process of a target working mode corresponding to the parent-child education software is matched, including:
determining the protocol type of the interactive request instruction according to the interactive request instruction, and generating a corresponding instruction processing protocol according to the protocol type;
and performing instruction processing on the interaction request instruction based on the instruction processing protocol, reading based on the processed interaction request instruction, and matching a target working mode corresponding to the parent-child education software according to the reading result.
The beneficial effects of the above technical scheme are: by processing and reading the instruction processing protocol, the read result is accurately matched with the target working mode corresponding to the parent-child education software.
Example 9:
on the basis of embodiment 1, this embodiment provides an intelligent data interaction method based on parent-child education, and in step 4, the method further includes:
obtaining a matching factor for matching the interaction request instruction with a target working mode corresponding to the parent-child education software, calculating the matching accuracy of the interaction request instruction and the target working mode according to the matching factor, and meanwhile, calculating the specific working process of the matching efficiency of the interaction request instruction and the target working mode according to the matching time and the matching accuracy of the interaction request instruction and the target working mode, wherein the specific working process comprises the following steps:
acquiring a matching factor of the interaction request instruction and the target working mode based on the parent-child education software;
calculating the matching accuracy of the interaction request instruction and the target working mode according to the matching factor;
wherein Z represents the matching accuracy of the interactive request instruction and the target working mode; lambda represents a matching factor and has a value range of (0.2, 0.5); mu represents the matching degree of the data corresponding to the interaction request instruction and the data corresponding to the target working mode; xi represents an error coefficient of the matching degree of the data corresponding to the interactive request instruction and the data corresponding to the target working mode, and the value range is (0.1, 0.3); x is the number of1Representing the effective execution efficiency of the interactive request instruction; x is the number of2Represents the instruction execution efficiency of the interactive request instruction, and x1>x2;
Acquiring the matching time of the interactive request instruction and the target working mode, and meanwhile, calculating the matching efficiency of the interactive request instruction and the target working mode based on the matching accuracy of the request instruction and the target working mode;
wherein eta represents the matching efficiency of the interaction request instruction and the target working mode; z represents the matching accuracy of the interaction request instruction and the target working mode; t represents the matching time of the interaction request instruction and the target working mode; lambda represents a matching factor and has a value range of (0.2, 0.5); t represents the ideal matching time; delta represents the reading time of the interactive request instruction; h represents the preset length of the interactive request instruction; v represents the speed of reading the interactive request command; z 'represents the preset accuracy of the interaction request instruction and the target working mode, and the value range is [0.9, 1], and Z' is more than Z;
analyzing the matching efficiency of the interaction request instruction and a target working mode, and acquiring the qualification rate of intelligent data interaction of the parent-child education software;
comparing the qualification rate of the intelligent data interaction of the parent-child education software with a reference qualification rate;
if the qualification rate of the intelligent data interaction of the parent-child education software meets the reference qualification rate, the parent-child education software does not need to carry out efficiency optimization;
otherwise, efficiency optimization is carried out on the parent-child education software until the qualification rate of intelligent data interaction of the parent-child education software meets the standard qualification rate.
In this embodiment, the matching factor may be a compatibility factor between the interactive request command and the target operation mode, that is, the matching factor.
In this embodiment, the error coefficient may be an unavoidable error value occurring in the matching process, and the error factor is considered to make the matching accuracy of the calculation more accurate.
In this embodiment, the reference yield may be equal to or greater than 60%.
In this embodiment, the efficiency optimization of the parent-child education software may be to reduce the interaction time, or to improve the matching accuracy of the interaction request instruction and the target working mode.
The beneficial effects of the above technical scheme are: the matching factors for matching the interaction request instruction with the target working mode corresponding to the parent-child education software are obtained, so that the matching accuracy of the interaction request instruction and the target working mode is calculated accurately according to the matching factors, the matching efficiency of the interaction request instruction and the target working mode is calculated accurately according to the matching time and the matching accuracy of the interaction request instruction and the target working mode, whether the parent-child education software is optimized or not is determined according to the matching efficiency, and the intelligent data interaction efficiency of parent-child education is improved greatly.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.