1. Introduction
The customary theory of reasoning is not constantly pertinent in everyday life circumstances, where the handy information is indistinct or rough. To cope with such variety of circumstances, a definite category of sets called fuzzy sets (f-sets) (put forward by Zadeh [1]) was observed as suitable. In such sets, each entity of universal set is stated by a belonging grade within [0, 1]. Nevertheless, to handle situations with more complication and hesitation, it was examined that f-sets portrayed some inadequacy for the justification with some parameterization modes. To deal with this insufficiency, Molodtsov [2] developed soft sets (s-sets) as a new arithmetical parameterized structure. In s-sets, every attribute is mapped to the power set of universal set while characterizing approximate function. A novel model of fuzzy soft sets (-sets) [3,4] was conceptualized by hybridizing f-sets and s-sets. Ali et al. [5], Li et al. [6], Maji et al. [7], Pei et al. [8], and Sezgin et al. [9] discussed the rudiments of s-sets with numerical examples. Babitha et al. [10,11] introduced the concept of relations, functions, and orders under soft set environment. The researcher [12,13] made rich contributions to the applications of s-set hybrids in decision making (DM).
Various real-life states of affairs demand the categorization of attributes into their respective subattributive nonoverlapping sets. The classical literature on s-sets is not capable for these situations; therefore, Smarandache [14] introduced hypersoft sets (-sets) to deal with insufficiencies of s-sets and to handle the environments with multiargument approximate function (maa-function). The basic axiomatic and algebraic properties of -sets have been investigated in [15] and explained by numerical examples. Ihsan et al. [16] discussed the validity of -sets for the entitlement of multidecisive opinions under expert set environment. Rahman et al. [17,18,19,20,21,22,23] explored the blended operational aspects of -sets by considering settings such as complex setting, convexity and concavity setting, parameterization setting, rough setting, and bijection setting. They utilized algorithm-based techniques to resolve real-world DM issues. Saeed et al. [24,25,26,27,28,29] characterized the novel notions of neutrosophic hypersoft mappings, complex multifuzzy -set, and neutrosophic hypersoft graphs with applications in decision-making and clinical diagnosis. Saqlain et al. [30,31,32] discussed decision-making techniques for neutrosophic -set with the help of aggregation operators and accuracy functions. Recently, Rahman et al. [33,34] made significant additions in the literature of -set by using its hybridized models in medical diagnosis and material selection, respectively.
A rapid increase has been reported in heart-related diseases due to substandard edibles, lack of physical exercises, and dull routine of work. The problem of diagnosing heart-related diseases has become crucial and critical. Several deaths have been reported roughly in every part of the world due to such diseases. This has drawn the attention of researchers and cardiologists to carve out various techniques to overcome this problem. Due to the involvement of various factors, it is very hard to identify the exact reasons for such diseases; therefore, most experts usually prefer to assess the susceptibility of patients for such diseases by using various techniques due to their severity. The researchers [35,36,37,38] made significant contributions by introducing various techniques to observe the behavior of electroencephalogram signals that are very helpful for the above mentioned problem.
1.1. Research Gap and Motivation
The concept of fuzzy parameterization is in fact intended for allocating the fuzzy grade to each attribute (or subattribute) in the domain of single-argument (or multiargument) approximate function. This concept has been discussed by several researchers [39,40,41,42,43,44,45,46,47,48] using soft-set-like models. In these models, fuzzy parameters are taken as elements in the domain of soft approximate mapping and fuzzy subsets are taken as elements in its codomain. Recently, the researchers [49,50,51,52,53,54] discussed the concept of fuzzy parameterization in matrices under soft set environment. They characterized various new properties and operations with matrix setting and applied them in decision-making, spaces, and numerical data classification. It can easily be observed that these models are unable to tackle the following settings collectively:
The hypersoft setting, which demands the categorization of parameters into their relevant subclasses containing their subparametric values; such kind of classification can only be managed by employing maa-function, which takes the Cartesian product (C-product) of subparametric-valued classes as its domain and then approximates them for universal set.
Riesz Summability setting, which is capable of tackling the sequential nature of data.
The existing literature is unable to provide any model that may address these limitations collectively. This scarcity of literature is the main source of inspiration for this research. The proposed study is an integrated study of two models: fuzzy parameterized fuzzy hypersoft set (-set) and Riesz Summability. This integration is capable of coping with the above mentioned settings collectively for the diagnosis of heart diseases by taking real data from Cleveland dataset (CD-set).
1.2. Significant Contributions
The significant contributions of the study are outlined as follows:
An innovative model fuzzy parameterized fuzzy hypersoft set (-set) is characterized and some of its axiomatic cum algebraic properties are investigated. This model employs maa-function with fuzzy parametric tuples as its domain and collection of fuzzy subsets as its codomain;
The classical concept of Riesz mean is reviewed and modified for -settings;
The real attributes of CD-set are analyzed for heart-based ailments analysis and only those of them are opted that have a pertinent role for the adopted model;
In order to have their respective attribute values, the operational roles of all opted attributes are discussed along with description on their measuring units;
The opted traits and their subvalues are changed to fuzzy values by employing a suitable algebraic technique;
Two algorithms (one for aggregations of -set and other for Riesz mean) are proposed and implemented in real-world scenario of medical diagnosis for heart diseases based on fuzzy-valued attributes of CD-set.
2. Preliminaries
In this segment of the paper, the necessary definitions are recollected to make the proposed concept clear to readers. The symbols , , and stand for initial universe, closed unit interval, and power set, respectively, throughout the paper.
([1]). Af-set is characterized by with and the value is recognized as grade of membership with respect to .
([1]). Let and are two f-sets. The f-set is said to be subset of other f-set , denoted by , if .
([1]). The union of two f-sets and is also a f-set , denoted by , such that its membership grade is given as for all .
([1]). The intersection of two f-sets and is also a f-set , denoted by , such that its membership grade is given as for all .
([1]). The complement of a f-set is also a f-set, denoted by , such that its membership grade is given as for all .
([2]). If is a set containing attributes, then the family of pairs is called s-set on , in which and .
([7]). Union of two s-sets and is a s-set with and for ,
([7]). Intersection of two s-sets and is a s-set with and for , .
Additional description on S-set and its operational properties can be reviewed in [3,7].
([14]). If is a set containing attributes and is a collection consisting of the C-product of nonoverlapping subclasses having subattributive values, then the family of pairs is known as -set on with .
([14]). A -set is stated as fuzzy -set when in is substituted with , where is the family of f-sets.
The references [14,15] are very useful for consulting more operational properties of -set.
([39]). A -set is stated as , where , and .
([55,56]). If is a sequence with and , then the matrix of Riesz mean is stated as
(1)
The necessary and sufficient condition for regularity of Riesz mean is when . Furthermore, every Riesz mean follows limitation method discussed in [57] and For sequence , Riesz transform is given as
(2)
If we take in Equation (2), we have
3. Fuzzy Parameterized Fuzzy Hypersoft Set (-Set)
The aim of this part is to present the characterization of basic notions of -set introduced by Rahman et al. [48] as a generalization of the concepts stated in [39,43,44] with some modifications. Let be parameter-valued sets for parameters (a set of parameters) with and . The notations will present the concept of subset, set difference, union, and intersection under fuzzy s-set environment.
A -set is defined as
, where with as fuzzy membership corresponds to each and is a multiargument approximate function with as fuzzy hypersoft approximate element of . The collection of all -sets is denoted by .
The -set is the generalization of f-set, s-set, -set, -set, -set, and -set. Some of its particular cases are as follows:
It transforms to -set if -setting is replaced with s-setting.
It takes the form of -set if fuzzy parameterization is omitted.
It converts to -set if fuzzy parameterization is ignored and -setting is replaced with s-setting.
It becomes s-set if fuzzy parameterization is ignored, -setting is replaced with s-setting and fuzzy grades are omitted.
It converts to f-set if fuzzy parameterization is ignored, -setting is replaced with s-setting, and fuzzy approximations are ignored.
Letand. The parameter-valued sets for each member ofare,, …,, andwith, where eachis a n-tuple element ofwith,stands for set cardinality. The-setcan be constructed as, which states that for approximate elementwith fuzzy membership(i.e.,) in domain of, the alternativesandhave fuzzy memberships(i.e.,) and(i.e.,), respectively. All remaining alternatives have fuzzy membershipcorresponding to. Other approximate elementscan be interpreted in a similar way.
If , then for and for all , is known as an empty -set and is denoted by .
If , then for and with fuzzy membership equal to 1 for all , is called a universal -set and is denoted by .
Let ; then, is a -subset of , denoted by if and for all .
The -set is called the complement of if and for all .
Let ; then, their union is a -set with and for all .
Let ; then, their intersection is a -set with and for all .
Let and . The subparametric-valued disjoint sets corresponding to each member of are , and , respectively; so, . The -sets are constructed as
then
and
4. Methodology and Algorithms
In this section, an algorithm based on fuzzy decision set of -set is proposed for clinical DM by using CD-set [58]. The pictographic demonstration of the inclusive assumed methodology of the study is provided in Figure 1.
4.1. Aggregations of -Set
Let -set ; then, a type-1 fuzzy decision set of (i.e., ) is symbolized as , where and
(3)
where stands for the set cardinality of with(4)
By Equation (3), it is observed that the following steps must be followed to compute the value of :
-
Only select those parametric tuples that contain in their approximations, i.e., the value of will be equal to their corresponding fuzzy grades .
-
Compute the product of fuzzy parameterized value and the obtained value of ; then, determine the sum of these products.
-
Lastly, divide the computed sum with cardinality of .
Let -set ; then, a type-2 fuzzy decision set of (i.e., ) is symbolized as , where and
(5)
where stands for the value that is necessary to compute Riesz mean with(6)
Similarly, by Equation (5), the first two steps are the same as in Definition 20 to compute the value of ; however, the third step is given as follows:-
Divide the computed sum with the value that is explained in Definition 12 and Example 1.
4.2. Cleveland Dataset
The CD-set [58] was developed for the analytical study of heart ailments. From the CD-set, a total three hundred and three patients were examined for the identification of heart-based ailments by taking into account seventy-six traits (nevertheless, only fourteen can be utilized for experimentation and investigation) with five outcomes. The depiction of these fourteen traits is tabulated in Table 1. In order to justify and implement -setting, six patients were selected to be examined for heart-based ailments by assuming nine of the most fitting traits. The portrayal view of these traits in conjunction with their CD-set-based values is presented in Table 2.
4.3. Salient Features of Opted Attributes
In order to have justification regarding the selection of attributes, this segment describes some of their salient features for heart-based ailments analysis. The features are conferred underneath:
Age. Aging is a self-determining menace aspect for heart ailments. Although this factor is reported higher in aged persons (more than 60 years), with the involvement of various supplementary reasons, adults can also be in danger. The cardiologists have classified the aging factor into four groups: (i) 20 years or less, (ii) 40 years or less, (iii) 60 years or less, (iv) more than 60 years.
Chest Pain Type. Chest pain is a significant factor that leads to the suffering of cardiac disorder. It may vary due to quality, span, area, and force. Its intensity may be sharp, distressing feeling, and deadly upset. The chest pain attached with heart diseases can be sorted as Typical Angina (TA), Atypical Angina (ATA), Non-Anginal pain, and Asymptomatic (AM) (see [58]). The first two types are considered significant factors towards the suffering of heart diseases; the others are of less significance but cannot be ignored.
Resting Blood Pressure. This pressure is produced due to blood flow in blood vessels on its walls. The narrowness of the blood vessels is reported due to this pressure. The medical experts have sorted it as systolic and diastolic. These are produced during active blood flow and relaxing state, respectively. Its measuring unit is mm Hg, in accordance with dataset. The standard values for systolic and diastolic are 120 and 80 mm Hg, respectively. More than 120 mm Hg and less than 80 mm Hg (see [59]) are considered abnormal values for systolic and diastolic, respectively.
Serum Cholesterol. Cholesterol is a variety of fat, recognized as lipid, which is encapsulated in proteins bundles (lipoproteins) and flows in blood vessels and capillaries. The common types of cholesterol are LDL, HDL, and triglycerides. These cholesterols cause the narrowness of the blood vessels, which may lead to severe heart issue. The LDL and HDL are also regarded as bad cholesterol and good cholesterol, respectively. A particular lab test ”Lipid Profile Test (LPT)“ is used to assess the values of these cholesterols. Its measuring unit is mg/dL, which is used in the adopted dataset. The serum cholesterol depends upon these cholesterol collectively and its level is determined by summing up the values of HDL and LDL along with 20% of triglycerides. Its values lie in the interval [126, 564] (see [60]). The types of cholesterol and their ranges are provided in Figure 2.
Fasting Blood Sugar. This is regarded as another authentic factor for the analysis of heart diseases. It is usually observed that heart patients have high glucose due to the ”tension reaction“. In other words, nondiabetic patients may also have its high ratio. The ranges for its usual observed values are presented in Figure 3. Its measuring unit is mg/dL, which is used in the adopted dataset. A value of 120 mg/dL (see [58]) is regarded as a typical value for healthy individual.
Maximum Heart Rate Achieved. Heart rate is the number of hearts beats per minute (bpm) and is regarded as a reliable source to determine the oxygen utilization in heart patients. Its values lies in the interval of 71 bpm, 195 bpm (see [61]).
Oldpeak and Slope. Oldpeak is usually meant for Shock-Toxicity depression (also known as ST-depression), which is provoked by rest-base work out. It is regarded as a trustworthy ECG (electrocardiogram) result for the analysis of disruptive coronary issues. Its measuring unit is mm, which can take values from the interval [0.0, 0.5]. Figure 4 presents its pictographic view. Its slope can be sorted into three types (see [58]): (i) Upsloping, (ii) Flat (Horizontal), (iii) Downsloping. The pictorial display of these categories is presented in Figure 5.
Thal. This is a familiar turmoil of blood recognized as thalassemia, which can be sorted into four categories: (i) Null (i.e., no flow of blood at all) (ii) Fixed Defect (i.e., partial flow of blood in some sections of the heart), (iii) Normal Blood Flow, and (iv) Reversible Defect (i.e., observation of blood flow without normality). The corresponding values assigned by medical experts to these categories are 0, 3, 6, and 7, respectively (see [58]). In case of heart disease diagnosis, the category (i) is usually disregarded.
4.4. Determination of Fuzzy-Values-Based Ranges for Opted Parameters
This part aims to describe a criterion to convert the original values (the allocated valued by CD-set) of parameters to fuzzy-values-based ranges. This task is accomplished with the employment of an algebraic criterion whereby its fuzzy-values-based range with respect to each parameter is determined by dividing its allocated values with maximum allocated value. For example, in Table 3, the maximum value is 80 years against the first parameter; therefore, by dividing all other allocated values of age by 80, the required ranges are obtained. In this way, the fuzzy-values-based ranges for remaining parameters are determined. Table 3 presents all such ranges.
4.5. Declaration of Problem
Mathematical approaches for medical identification of definite ailments have earned immense concentration from scholars. These approaches may entail factual or imaginary information/records. With the introduction of f-set, investigators have been tempted to f-set-based approaches for medicinal analysis with vague settings. Several developments have been established in this field. The -set has gained much significance in this regard as it has the potential to generalize the classical models and to manage the shortcomings depicted by these structures. It is scrutinized that few researches have been reported so far relating to medicinal study of definite ailments based on mathematical context with -setting and fuzzy parameterization setting by assuming factual data. It is a commendable aspect of this study that factual variables of CD-set have been utilized to the context of medicinal analysis of heart-related ailments under a reliable-cum-flexible model. The factual input variables are assigned a specific degree of uncertainty to assist the medical expert in judging the vague nature of these variables.
4.6. Proposed Algorithm Based on -set and Its Implementation
Now, an algorithm (Algorithm 1) is put forward by taking into consideration the aggregations of -set with the aim of medicinal identification of heart-related diseases.
Algorithm 1: Steps for the analysis of heart-related diseases based on -set. |
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The procedural flow of this algorithm is displayed in Figure 6.
Now, the above algorithm is elaborated with the application below.
Input Stage: (Step 1–Step 3) In order to make the computations easy, 6 patients are considered who are likely to be examined for heart-related disease. The initial universe is constructed. Suppose that is the collection of parameters with descriptions such as age, chest pain type, resting blood pressure, serum cholesterol, fasting blood sugar, maximum heart rate achieved, old peak, slope, and thal. Their parametric-valued subclasses are as follows:
Construction Stage: Step 4
In this step, compute the C-product , where r is the product of cardinalities of .
Step 5:
With the mutual understanding and consensus of medical experts, and are given preference in , and in , in , in , in , and in , in , in , and in . Thus, the set is constructed.
Step 6:
Now, we calculate fuzzy membership values and in accordance with Figure 3 for each and , respectively, preferred by medical specialist. The fuzzy membership of is equal to the arithmetic mean of the fuzzy membership values of belonging to tuple . Similarly, the fuzzy membership values of the remaining can be calculated in the same manner. These calculated values are given in Table 4 and Table 5, respectively.
Now, we construct -set by using Definition 13
Its tabular representation is given in Table 6 (see Figure 7 for graphical interpretation).
Computation Stage: Step 7
Now, we calculate fuzzy membership of fuzzy decision set for -set corresponding to each . For this purpose, we need to find the containment status of each in approximate values of . Such information is given in Table 7 and, with the help of this information, fuzzy membership is computed for each and given in Table 8.
Step 8:
Now, we construct fuzzy decision set for -set corresponding to all by using their fuzzy membership values , which are given in Table 8.
The values of Table 8 are interpreted graphically in Figure 8.
.
Decision Stage: Step 9
The maximum value of is 0.343900 for . Hence, it is observed that the patient is expected to be diagnosed for heart disease.
4.7. Proposed Algorithm Based on Riesz Summability
In this part of the paper, another algorithm (Algorithm 2) is put forward by taking into consideration the concept of Riesz Summability to diagnose heart-related diseases in patients.
Algorithm 2: Analysis of Heart-related Diseases through the concept of Riesz Summability. |
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The procedural flow of this algorithm is displayed in Figure 9.
The above algorithm is validated with the help of the following example.
Consider the data from Example 4, which covers all the steps of first two stages, i.e., input stage and construction stage of Algorithm 2. Therefore, we start with computation stage as given below.
Computation: Step 7
Let and . Then .
Step 8:
Now, we calculate fuzzy membership for each by using Definition 21, Table 6 and Table 7. The calculated fuzzy membership values are given in Table 9.
The graphical interpretation of Table 9 is presented in Figure 10.
Step 9:
Now, we construct fuzzy decision set for -set corresponding to all by using their fuzzy membership values , which are given in Table 9.
.
Decision Stage: Step 10
As the maximum value of is 0.484964 for , it is observed that the patient is expected to be diagnosed for heart disease.
The comparison of the results obtained from both algorithms is presented in Figure 11.
5. Discussion and Comparison Analysis
Yılmaz et al. [40] applied and compared the concepts of -set and Riesz Summability given by Çağman et al. [39] and Altay et al. [55], respectively, for solving decision-making problem with hypothetical data under uncertain environment. Kirişci [41,42] employed CD-set for the diagnosis of heart diseases through decision-making techniques based -set. Rahman et al. [48] conceptualized -set as a generalization of -set [3] and -set [39,43,44]. This study employed fuzzy decision set techniques (modification of aggregations discussed in [39]) of -set for solving medical decision-making problem with real values of attributes from CD-set. Kirişci used single-argument approximate function of -set to deal with 11 attributes out of 14 prescribed attributes from CD-set. He assigned hypothetical fuzzy membership values to these fuzzy parameters without any appropriate criterion. As the single-argument approximate function maps attributes to subsets of universal set, subparametric values of adopted attributes are not focused and ignored, which raises questions as to the reliability of decision-making. In short, the above mentioned existing models are not capable to manage the following settings collectively:
1.. The setting when parameters and their subparametric-values-based tuples are ambiguous, i.e., decision makers are not sure about their preference-based selection. In other words, the parameters and their subparametric-values-based tuples are uncertain for decision-makers.
2.. The setting where it is necessary to categorize the parameters into their related disjoint subclasses having their subparametric values. This setting demands the entitlement of multiargument approximate function, which has the capability to cope with such subparametric-valued disjoint classes. Its domain is the C-product of these classes and range is the subsets of initial universe.
On the contrary, this study has used the multiargument approximate function, which not only focuses on attributes but also emphasizes on their corresponding attributive values. The real attributes are taken from CD-set and then these values are converted to their related fuzzy values by employing an appropriate criterion rather than assigning hypothetical values. The selected attributes are further partitioned into disjoint sets having their respective subattributive values. The C-product of these sets is obtained to furnish the requirement for the domain of multiargument approximate function. Each element of this domain is further transformed to fuzzy grades to cope with the scenario of -set. Two types of fuzzy decision sets are introduced for -set on the basis of set cardinality and Riesz mean that have further been used to propose algorithms for solving medical decision-making problem for the diagnosis of heart diseases. The results have been compared and found successful. It has been observed that both algorithms yield different fuzzy membership values for patients under consideration but provided the same rankings (see Figure 12). The problem of heart-disease-based medical diagnosis has not been addressed by any author in literature under fuzzy parameterized-like models. Therefore, numerical-results-based comparison of the proposed study is not possible with any existing fuzzy-set-like models; however, its structural comparison is discussed with most relevant models to assess the flexibility and advantageous aspects. Table 10 and Table 11 present the structural comparison of the proposed study by taking into consideration few pertinent factors.
Merits of Proposed Study
Now, some merits of this study are underlined as follows:
The presented approach took the importance of inspiration of fuzzy-parameterization associated by -set to manage modern-day DM issues. The assignment of parameterized fuzzy grade imitates the possibility of recognition level; in this way, it has incredible prospective in the real description within the scope of computational scenarios.
Real attributes of CD-set are converted to fuzzy membership by using algebraic technique.
The sequential nature of approximate values of -set is managed by employing classical concept of Riesz Summability and analogous results have been achieved.
Since the presented model put emphasis on comprehensive study of parameters (i.e., additional classification of parameters) more willingly than focusing on parameters merely, consequently, it enables decision-makers to have better and more reliable decisions.
The two proposed algorithms have ranked the patients with analogous and consistent results by considering a smaller number of attributes.
6. Conclusions
In this article, a multiattribute, decision-based medical diagnosis for heart diseases is discussed by using two set-theoretic models, i.e., -set and Riesz Summability. The former one -set is the generalization of fuzzy parameterized fuzzy soft set, fuzzy parameterized soft set, fuzzy soft set, and soft set. It is capable of managing the shortcomings of such structures regarding deliberation of approximate mapping with multiarguments. This kind of mapping considers the C-product of subparametric tuples as its domain and then maps them to the power set of universal set. It lays emphasis on the classification of each parameter into its respective parametric-valued sets, which is not considered by existing soft-set-like models. The later one is a classical approach of mathematical analysis, which is projected to tackle the sequential nature of uncertain data. As it is commonly observed that data used in medical diagnosis are of sequential and uncertain nature, both issues are resolved by using -set and Riesz Summability. The input variables are taken from CD-set, and the operational role of each variable is investigated. Factual input values are converted to relevant fuzzy membership values. Two algorithms based on two types of decision set for -set are proposed and validated with examples for diagnosis of patients for heart diseases. Both algorithms are proved consistent and analogous results are achieved. As this study has considered only fuzzy membership for dealing with uncertainties in parameters as well as fuzzy hypersoft numbers, it depicts inadequacy to tackle scenarios with entitlement of nonmembership and indeterminacy grades. Therefore, it can be extended to manage such scenarios. Moreover, this can further be studied by discussing other cases under vague settings with fuzzy parameterized settings by using more than nine attributes and more than six patients. Its scope covers a wide range of computational intelligence and neuroscience under fuzzy-set-like environments.
Conceptualization, A.U.R., M.S., M.A.M.; methodology, A.U.R., M.S., M.M.J.; software, A.U.R., M.A.M., M.M.J., B.G.-Z.; validation, M.M.J., B.G.-Z.; formal analysis, A.U.R., M.S., B.G.-Z.; investigation, A.U.R., M.S., M.M.J.; data curation, M.A.M., B.G.-Z.; writing of the original draft, A.U.R., M.S., M.A.M.; writing of the review and editing, A.U.R., M.A.M., B.G.-Z.; visualization, A.U.R., M.S., M.M.J.; supervision, M.S., M.A.M., M.M.J.; project administration, M.S., B.G.-Z. All authors have read and agreed to the published version of the manuscript.
Not applicable.
Not applicable.
In this research, the data relating to attributes and their subattributes are taken from the Cleveland Data set (heart disease dataset), which is freely available online at (
Authors would like to express their special thanks of gratitude to UCI Machine Learning Repository
The authors declare no conflict of interest.
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Figure 5. Pictographic view of ST-segment (source: https://litfl.com/st-segment-ecg-library (accessed on 3 October 2021)).
Figure 8. Fuzzy membership [Forumla omitted. See PDF.] for each [Forumla omitted. See PDF.].
Figure 10. Fuzzy membership [Forumla omitted. See PDF.] for each [Forumla omitted. See PDF.].
Brief description of parameters in CD-set.
Ordering |
Ordering |
Parameters |
Parameters |
---|---|---|---|
1 | 3 | age | Age in years |
2 | 4 | sex | Sex (male/female) |
3 | 9 | cp | Chest pain type) |
4 | 10 | trestpbs | Resting blood pressure (mm Hg) |
5 | 12 | chol | Serum cholesterol (mg/dL) |
6 | 16 | fbs | Fasting blood sugar (120 mg/dL) |
7 | 19 | restecg | Resting electrocardiographic results |
8 | 32 | Thalach | Maximum heart rate achieved |
9 | 38 | Exang | Exercise-induced angina |
10 | 40 | Oldpeak | ST depression induced by exercise relative to rest |
11 | 41 | slope | The slope of the peak exercise ST segment |
12 | 44 | ca | Number of major vessels (0–3) colored by fluoroscopy |
13 | 51 | thal | 3 = normal; 6 = fixed defect; 7 = reversible defect |
14 | 58 | num | Diagnosis of heart disease (angiographic disease status) |
Description of subparametric values for opted parameters.
Ordering |
Ordering |
Parameters |
Parameters |
Values related |
---|---|---|---|---|
1 | 3 | age | Age in years | 0–20, 21–40, 41–60, Above 60 |
3 | 9 | cp | Chest pain type | 1. Typical angina, 2. atypical angina, 3. non-anginal pain, 4. asymptomatic |
4 | 10 | trestpbs | Resting blood pressure (mm Hg) | 90–200 mm Hg |
5 | 12 | chol | Serum cholesterol (mg/dL) | 126–564 mg/dL |
6 | 16 | fbs | Fasting blood sugar (120 mg/dL) | 120 mg/dL |
8 | 32 | Thalach | Maximum heart rate achieved | 71–195 |
10 | 40 | Oldpeak | ST depression induced by exercise relative to rest | 0.0–5.6 |
11 | 41 | slope | The slope of the peak exercise ST segment | 1. upsloping, 2. flat, 3. downsloping |
13 | 51 | thal | 3 = normal; 6 = fixed defect; 7 = reversible defect | 1. normal, 2. fixed defect, 3. reversible defect |
Fuzzy-values-based ranges of opted parameters.
Selected Parameters | Relevant Values in CD-Set | Transformed Fuzzy Membership Grades |
---|---|---|
Age | 0–20, 21–40, 41–60, 61–80 | 0–0.25, 0.2625–0.50, 0.5125–0.75, 0.7625–1.00 |
Chest pain type) | 1, 2, 3, 4 | 0.25, 0.50, 0.75, 1.00 |
Resting blood pressure | 90–200 | 0.45–1.00 |
Serum cholesterol | 126–564 | 0.2234–1.0000 |
Fasting blood sugar | 0, 120 | 0,1 |
Maximum heart rate achieved | 71–195 | 0.3641–1.0000 |
Oldpeak | 0.0–5.6 | 0–1 |
Slope | 1, 2, 3 | 0.33, 0.66, 1.00 |
Thal | 3, 6, 7 | 0.43, 0.86, 1.00 |
Fuzzy membership corresponding to each
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0.5 |
|
0.7 |
|
0.25 |
|
0.50 |
|
0.75 |
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0.57 |
|
1.00 |
|
0.42 |
|
0.72 |
|
0.66 |
|
1.00 |
|
0.86 |
Fuzzy membership corresponding to each
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0.5 | 0.5 | 0.5 | 0.5 | ||||
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0.7 | 0.7 | 0.7 | 0.7 | ||||
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0.25 | 0.25 | 0.25 | 0.25 | ||||
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0.5 | 0.5 | 0.5 | 0.5 | ||||
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0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 |
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0.57 | 0.57 | 0.57 | 0.57 | 0.57 | 0.57 | 0.57 | 0.57 |
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1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
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0.42 | 0.42 | 0.42 | 0.42 | ||||
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0.72 | 0.72 | 0.72 | 0.72 | ||||
|
0.66 | 0.66 | 0.66 | 0.66 | 0.66 | 0.66 | 0.66 | 0.66 |
|
1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
|
0.86 | 0.86 | 0.86 | 0.86 | 0.86 | 0.86 | 0.86 | 0.86 |
|
0.667 | 0.701 | 0.695 | 0.729 | 0.690 | 0.723 | 0.717 | 0.751 |
Tabular Representation of
|
|
|
|
|
|
|
---|---|---|---|---|---|---|
|
0.2 | 0.3 | 0.0 | 0.4 | 0.6 | 0.7 |
|
0.0 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 |
|
0.3 | 0.5 | 0.3 | 0.0 | 0.4 | 0.5 |
|
0.5 | 0.4 | 0.3 | 0.2 | 0.0 | 0.1 |
|
0.0 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 |
|
0.4 | 0.4 | 0.5 | 0.6 | 0.8 | 0.0 |
|
0.3 | 0.6 | 0.4 | 0.4 | 0.5 | 0.2 |
|
0.7 | 0.5 | 0.3 | 0.5 | 0.4 | 0.3 |
Containment of
|
|
|
|
|
|
|
|
|
|
|
Fuzzy membership
|
|
---|---|
|
0.217050 |
|
0.294063 |
|
0.232288 |
|
0.275663 |
|
0.343900 |
|
0.278850 |
Fuzzy membership
|
|
---|---|
|
0.306081 |
|
0.414684 |
|
0.327569 |
|
0.388736 |
|
0.484964 |
|
0.393231 |
Structural analysis of presented structure with pre-developed approaches.
Authors | Structures | Focus on Attributes | Focus on Subattributive Values | Data Set | Proper Criteria for Fuzzification of Fuzzy Parameters | Riesz Summability |
---|---|---|---|---|---|---|
Ça |
Yes | Ignored | Hypothetical | N/A | N/A | |
Yılmaz et al. [ |
Yes | Ignored | Hypothetical | N/A | Yes | |
Kirişci [ |
Yes | Ignored | CD-set | N/A | N/A | |
Riaz et al. [ |
Yes | Ignored | Hypothetical | N/A | N/A | |
Zhu et al. [ |
Yes | Ignored | Hypothetical | N/A | N/A | |
Rahman et al. [ |
Yes | Yes | Hypothetical | N/A | N/A | |
Proposed Study | Yes | Yes | CD-set | Adopted | Yes |
Structural analysis of presented structure with predeveloped approaches.
Authors | Structures | NOA | NOP | Ranking Based on Riesz Summability Method | Ranking Based on Other Adopted Method | Remarks |
---|---|---|---|---|---|---|
Kirişci [ |
11 | 06 | N/A |
|
subattributive values are ignored. | |
Kirişci [ |
11 | 06 | N/A |
|
subattributive values are ignored. | |
Proposed Study | 09 | 06 |
|
|
Although values of both methods are different but they both proved analogous with similar ranking of patients. |
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Abstract
Fuzzy parameterized fuzzy hypersoft set (
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1 Department of Mathematics, University of Management and Technology, Lahore 54000, Pakistan;
2 College of Computer Science and Information Technology, University of Anbar, Ramadi 31001, Iraq
3 Department of Computer Science, Dijlah University College, Baghdad 00964, Iraq;
4 eVIDA Laboratory, University of Deusto, Avda/Universidades 24, 48007 Bilbao, Spain