Academic literature on the topic 'HFLTTC'
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Journal articles on the topic "HFLTTC"
1
Huang, Han-Chen, and Xiaojun Yang. "Pairwise Comparison and Distance Measure of Hesitant Fuzzy Linguistic Term Sets." Mathematical Problems in Engineering 2014 (2014): 1–8. http://dx.doi.org/10.1155/2014/954040.
Full textAbstract:
A hesitant fuzzy linguistic term set (HFLTS), allowing experts using several possible linguistic terms to assess a qualitative linguistic variable, is very useful to express people’s hesitancy in practical decision-making problems. Up to now, a little research has been done on the comparison and distance measure of HFLTSs. In this paper, we present a comparison method for HFLTSs based on pairwise comparisons of each linguistic term in the two HFLTSs. Then, a distance measure method based on the pairwise comparison matrix of HFLTSs is proposed, and we prove that this distance is equal to the distance of the average values of HFLTSs, which makes the distance measure much more simple. Finally, the pairwise comparison and distance measure methods are utilized to develop two multicriteria decision-making approaches under hesitant fuzzy linguistic environments. The results analysis shows that our methods in this paper are more reasonable.
2
Liu, Xiaodi, Jianjun Zhu, Shitao Zhang, and Guodong Liu. "Multiple Attribute Group Decision-Making Methods Under Hesitant Fuzzy Linguistic Environment." Journal of Intelligent Systems 26, no. 2 (April 1, 2017): 387–406. http://dx.doi.org/10.1515/jisys-2015-0159.
Full textAbstract:
AbstractThe aim of this paper is to develop some aggregation operators for multiple-attribute group decision making (MAGDM) with hesitant fuzzy linguistic information. First, the relationship between uncertain linguistic variable and hesitant fuzzy linguistic term set (HFLTS) is discussed. Some operations and aggregation operators for HFLTSs are developed. Second, based on the hesitant fuzzy linguistic weighted arithmetic averaging operator and the hesitant fuzzy linguistic hybrid averaging operator, an approach to MAGDM problem with hesitant fuzzy linguistic information is proposed. Finally, a practical application of the developed approach to supplier selection in a supply chain and a comparative analysis with other methods are presented.
3
Yalçın, Neşe, and Nimet Yapıcı Pehlivan. "Application of the Fuzzy CODAS Method Based on Fuzzy Envelopes for Hesitant Fuzzy Linguistic Term Sets: A Case Study on a Personnel Selection Problem." Symmetry 11, no. 4 (April 4, 2019): 493. http://dx.doi.org/10.3390/sym11040493.
Full textAbstract:
Fuzzy multi-criteria decision-making (MCDM) methods are useful and reliable for multi-criteria selection problems under uncertain and imprecise situations. In these methods, if decision-makers hesitate among several linguistic terms, hesitant fuzzy linguistic term sets (HFLTSs), represented by a set of successive linguistic terms instead of single linguistic terms, may be more appropriate to make evaluations. The notion of a fuzzy envelope for the HFLTSs is a beneficial tool that can be directly applied to fuzzy MCDM methods to elicit comparative linguistic expressions (CLEs). The aim of this study is to present a methodology that combines the fuzzy CODAS (COmbinative Distance-based Assessment) method with the fuzzy envelope of HFLTs based on CLEs to solve a personnel selection problem. In order to examine the feasibility of the presented methodology, a case study on blue-collar personnel selection in a manufacturing firm is conducted. A sensitivity analysis is performed to demonstrate the stability and validity of the ranking results. Furthermore, the ranking results of the presented methodology are compared with various fuzzy MCDM methods, including fuzzy EDAS, fuzzy TOPSIS, fuzzy WASPAS, fuzzy ARAS, and fuzzy COPRAS. The results show that the presented methodology is efficient and stable for solving personnel selection problems in a hesitant fuzzy environment.
4
Zhao, Na, Zeshui Xu, and Zhiliang Ren. "Some Approaches to Constructing Distance Measures for Hesitant Fuzzy Linguistic Term Sets with Applications in Decision-Making." International Journal of Information Technology & Decision Making 17, no. 01 (January 2018): 103–32. http://dx.doi.org/10.1142/s0219622017500316.
Full textAbstract:
The purpose of this paper is to investigate the methods of constructing distance measures for hesitant fuzzy linguistic term sets (HFLTSs) and their applications in multi-criteria decision-making (MCDM). We first present some methods to construct distance measures for HFLTSs. Then, we discuss the properties of different distance measures in detail, which are very helpful in comparison of these distance measures for HFLTSs. After that, based upon the distance measures for HFLTSs, a decision-making method is proposed to solve the MCDM problems, in which the assessment values of alternatives over criteria are HFLTSs and the weights of criteria are completely unknown or expressed by HFLTSs. Finally, an example concerning the evaluation of movie quality is provided to demonstrate the practicability of the proposed method, and necessary comparative analyses are conducted to illustrate the effectiveness and advantages of the developed distance measures and the proposed decision-making method.
5
Yue, Qi, Bingwen Yu, Yongshan Peng, Lei Zhang, and Yu Hong. "Hesitant fuzzy linguistic two-sided matching decision making." Filomat 32, no. 5 (2018): 1853–60. http://dx.doi.org/10.2298/fil1805853y.
Full textAbstract:
This paper combines the theory of hesitant fuzzy linguistic term sets (HFLTSs) with two-sided matching decision making (TSMDM). The related definitions of HFLTSs and two-sided matchings (TSMs) are introduced. Then, the problem of TSMDM with HFLTSs is presented. For solving this problem, a model of TSMDM with HFLTSs is developed. The AHP method is used to determine the important degrees of agents of each side. On this base, the model of TSMDM can be changed into a double-goal model with HFLTSs. Then, the double-goal model with HFLTSs is changed into the double-goal model with scores through using the proposed score function. Furthermore, the double-goal model can be changed into a single-goal model by using the linear weighting technique once again. The scheme of TSM can be obtained through solving the single-goal model. At last, an example with sensitive analysis is provided for the illustration of the presented approach of TSM.
6
Geng, Xiuli, Yunting Jin, and Yongzheng Zhang. "A Novel Group Decision-Making Approach for Hesitant Fuzzy Linguistic Term Sets and Its Application to VIKOR." Mathematical Problems in Engineering 2020 (July 27, 2020): 1–20. http://dx.doi.org/10.1155/2020/7682983.
Full textAbstract:
This paper develops a novel group decision-making (GDM) approach for solving multiple-criteria group decision-making (MCGDM) problems with uncertainty. The hesitant fuzzy linguistic term sets (HFLTSs) are applied to elicit the decision makers’ linguistic preferences due to their distinguished efficiency and flexibility in representing uncertainty. However, the existing context-free grammar for linguistic description cannot allow generating the linguistic expressions completely free to limit the richness of HFLTSs, and the related methods for dealing with HFLTSs also have limitations in aggregating HFLTSs with different lengths and types. Therefore, this paper proposes extended context-free grammar and a novel GDM approach for HFLTSs, considering the advantages of the rough set theory and OWA operators. The rough set theory can manage the uncertainty existing in the fuzzy representation and deal with HFLTSs represented by the 2-tuple fuzzy linguistic model to get rough number sets. The OWA operator can aggregate these sets with different numbers of elements into an interval simply and objectively. Then, an extended VIKOR method based on the proposed GDM approach for HFLTSs is presented to solve the MCGDM problems. Finally, two examples are given to illustrate the applicability and validity of the developed GDM approach and the hesitant VIKOR method through sensitivity and comparison analysis with other existing approaches.
7
Liu, Donghai, Yuanyuan Liu, and Xiaohong Chen. "The New Similarity Measure and Distance Measure of a Hesitant Fuzzy Linguistic Term Set Based on a Linguistic Scale Function." Symmetry 10, no. 9 (August 29, 2018): 367. http://dx.doi.org/10.3390/sym10090367.
Full textAbstract:
The existing cosine similarity measure for hesitant fuzzy linguistic term sets (HFLTSs) has an impediment as it does not satisfy the axiom of similarity measure. Due to this disadvantage, a new similarity measure combining the existing cosine similarity measure and the Euclidean distance measure of HFLTSs is proposed, which is constructed based on a linguistic scale function; the related properties are also given. According to the relationship between the distance measure and the similarity measure, a corresponding distance measure between HFLTSs is obtained. Furthermore, we generalize the technique for order preference by similarity to an ideal solution (TOPSIS) method to the obtained distance measure of the HFLTSs. The principal advantages of the proposed method are that it cannot only effectively transform linguistic information in different semantic environments, but it can also avoid the shortcomings of existing the cosine similarity measure. Finally, a case study is conducted to illustrate the feasibility and effectiveness of the proposed method, which is compared to the existing methods.
8
Batur Sir, G. Didem, and Ender Sir. "Pain Treatment Evaluation in COVID-19 Patients with Hesitant Fuzzy Linguistic Multicriteria Decision-Making." Journal of Healthcare Engineering 2021 (February 1, 2021): 1–11. http://dx.doi.org/10.1155/2021/8831114.
Full textAbstract:
The coronavirus disease 2019 (COVID-19) has emerged as a worldwide pandemic since March 2020. Although most patients complain of moderate or severe pain, these symptoms are generally underestimated and appropriate treatment is not applied. This study aims to guide physicians in selecting and ranking various alternatives for the treatment of pain in COVID-19 patients. However, the choice of treatment for pain requires the consideration of many different conflicting criteria. Therefore, we have studied this problem as a multicriteria decision-making problem. Throughout the solution procedure, first, the criteria and subcriteria affecting the preferences are defined. Then, weight values are determined with respect to these criteria, as they have different degrees of importance for the problem. At this stage, hesitant fuzzy linguistic term sets (HFLTSs) are used, and thus, experts can convey their ideas more accurately. In this first phase of the study, an HFLTS integrated Analytic Hierarchy Process (AHP) method is utilized. Subsequently, possible treatment alternatives are evaluated by using the Vise Kriterijumska Optimizacija I Kompromisno Resenje (VIKOR) method. According to the results obtained by considering expert evaluations, the most preferred treatment is the administration of paracetamol, followed by interventional treatments, opioids, and nonsteroidal anti-inflammatory drugs (NSAIDs), respectively. With this study, it is ensured that a more accurate method is followed by eliminating possible mistakes due to the subjective evaluations of experts in the process of determining pain treatment. This method can also be used in different patient and disease groups.
9
Kikushige, Yoshikane, Goichi Yoshimoto, Toshihiro Miyamoto, Fumihiko Ishikawa, Hiromi Iwasaki, Mine Harada, and Koichi Akashi. "hFlt3 Expression Marks Long-Term Hematopoietic Stem Cells, but Not the Pathway Common to Granulocyte/Monocyte and Lymphoid Lineages in Human Hematopoiesis." Blood 108, no. 11 (November 16, 2006): 1654. http://dx.doi.org/10.1182/blood.v108.11.1654.1654.
Full textAbstract:
Abstract Flt3 is a tyrosine kinase receptor, whose signals support proliferation and differentiation of early hematopoietic progenitors in cooperation with other cytokine signals. The concept of myeloid vs. lymphoid commitment in murine hematopoiesis has been challenged based on the analysis of Flt3 expression (Adolfsson et al, Cell, 2006): Long-term murine hematopoietic stem cells (HSCs) with self-renewal activity do not express murine Flt3 (mFlt3), but mFlt3 is upregulated in a fraction of progenitors common to granulocyte/monocyte and lymphoid lineages, suggesting the existence of the 3rd pathway of murine hematolymphoid development. In order to test whether Flt3 expression can delineate such a developmental pathway also in human hematopoiesis, we have analyzed the expression of human Flt3 (hFlt3) in prospectively-purified human stem and progenitors (PNAS 99, 2002) by utilizing 7-color FACS and a highly efficient xenograft systems. Surprisingly, all single human hCD34+hCD38-Thy-1+Lin-long-term HSCs expressed Flt3 at a low level. Purified Flt3lo HSCs can reconstitute NOD-scid/IL2Rγnull newborns (Blood 106, 2005) for a long-term after adoptive transfer of only 100 cells, and generated all hematopoietic cells including GM, megakaryocyte/erythrocyte (MegE), T, B and NK cells, providing formal proof that hFlt3 is expressed in long-term multipotent human HSCs. In the myeloid pathway, hCD34+hCD38+hCD45RA-IL-3RαloLin-CMPs expressed low to negative levels of hFlt3, and hCD34+hCD38+CD45RA-IL-3Rα-Lin-MEPs did not express Flt3. However, in marked contrast to murine progenitors, hCD34+hCD38+hCD45RA+IL-3RαloLin-GMPs uniformly expressed hFlt3 at the highest level. We then separated CMPs into 2 fractions with negative and low level expression of Flt3. In vitro culture in the presence of cytokine cocktail revealed that hFlt3lo CMPs differentiated into hFlt3-CMPs, hFlt3-MEPs and hFlt3hi GMPs, while hFlt3-CMPs mainly generated hFlt3-MEPs in vitro, suggesting that hFlt3lo CMPs is located upstream of the hFlt3-CMP stage that has skewed differentiation potential into the MegE lineage. In vitro differentiation activity of these progenitors was not affected with or without hFlt3 ligand in the culture. hFlt3 ligand, however, appeared to be able to maintain survival of hFlt3-expressing stem and progenitor cells at least in vitro. Thus, in striking contrast to mice, hFlt3 expression is already initiated at the most primitive long-term HSC stage, and is progressively upregulated in accordance with GM lineage differentiation. These data collectively suggest that the role of Flt3 signaling in hematopoietic development might be quite different between human and mouse, and that hFlt3 signaling may especially play a critical role in maintenance of long-term HSCs and in development of GM cells in human hematopoiesis.
10
Onai, Nobuyuki, Aya Onai, Roxane Tussiwand, Antonio Lanzavecchia, and Markus G. Manz. "Flt3 Receptor Expression Rescues Dendritic Cell Developmental Potential in Megakaryocyte/Erythrocyte Progenitor Cells." Blood 104, no. 11 (November 16, 2004): 2165. http://dx.doi.org/10.1182/blood.v104.11.2165.2165.
Full textAbstract:
Abstract Flt3/Flt3-ligand has a non-redundant role in dendritic cell (DC) and interferon producing cell (IPC) development from hematopoietic progenitor cells. Flt3-ligand−/− mice display a severe reduction of DCs and IPCs, and both, Flt3-ligand injection and conditional over- expression of Flt3-ligand in mice leads to an increased pool size of both cellular subsets. Furthermore, DC and IPC developmental precursor activity segregates with Flt3+ progenitor populations in mouse bone marrow. We have reported that common myeloid progenitors (CMPs) and their progeny granulocyte/macrophage progenitors (GMPs) as well as common lymphoid progenitors (CLPs) and pro-T cells can give rise to DCs in vitro and in vivo. DC developmental potential was lost, however, once definitive megakaryocyte/erythrocyte or B cell commitment occurs, both steps that are accompanied by loss flt3 receptor expression. To test if DC/IPC developmental potential can be regained, we evaluated the effect of ecotropic expression of human Flt3 in lin−c-kit+Flt3−Thy1.1−IL-7Ra− cells (flt3− progenitors) and in megakaryocyte/erythrocyte progenitors (MEPs). hFlt3 was transduced into purified flt3− progenitors, MEPs, and GMPs using a retrovirus vector carrying both hFlt3 and GFP. The transduction efficiencies were 20~25%. hFlt3-transduced flt3− progenitors gave rise to functional DCs and IPCs, but not control-GFP-transduced flt3− progenitors in vitro. Similarly, hFlt3-transduced MEPs differentiated into functional DCs in Flt3L, SCF, GM-CSF, IL-4, and TNF-a supplemented cultures but not into TER119+ erythroid cells. DC developmental potential of hFlt3-transduced MEPs was comparable to GFP-transduced GMPs. Over expression of hFlt3 in GMPs resulted in augmentation of its DC developmental potential. Interestingly, both hFlt3-tarnsduced MEPs and GMPs preferentially differentiated into IPCs in Flt3L supplemented medium. RT-PCR analysis revealed that enforced Flt3 signaling in MEPs lead to up-regulation of GM- and/or DC-development affiliated genes such as G-CSF receptor, M-CSF receptor, and GM-CSF receptor, PU.1, C/EBPa and STAT3. Furthermore, hFlt3-transduced MEPs gave rise to myeloid colonies (CFU-GM/G/M) but not CFU-Mix colonies in GM-CSF, IL-3, SCF, Flt3L, Tpo, and Epo supplemented methylcellulose medium. These results show that artificial Flt3 signaling in otherwise Flt3− progenitors is sufficient to reestablish DC/IPC differentiation and GM-differentiation programs.
Dissertations / Theses on the topic "HFLTTC"
1
Thuoc, Bui Duc, and n/a. "Teaching functional spoken English at the Hanoi Foreign Languages Teachers' Training College." University of Canberra. Education, 1988. http://erl.canberra.edu.au./public/adt-AUC20061109.133858.
Full textAbstract:
The English language occupied a specially
important status in the increasing development of science,
technology, culture and international relations in Vietnam,
which has resulted in a growing demand for English Language
Teaching (ELT) all over the country. The Hanoi Foreign
Languages Teachers' Training College in general and its
Department of English in particular plays a very important
role in this by producing as many teachers of English as
possible for high schools as well as for other Colleges and
Universities in Vietnam as a whole. Unfortunately, ELT in
Vietnam is still far from satisfactory. There exists a common
problem of communicative competence in Vietnamese students,
even in Vietnamese teachers of English. ELT at HFLTTC is
taken to illustrate the fact that even after five years'
training, graduates remain deficient in the ability of
language use as well as understanding its use in normal
communication. This being the case, how can they carry out
effectively the teaching of English to high school pupils or
students at other institutions?
In this situation, we need to take a serious look
at ELT in the Department of English at the HFLTTC so as to
suggest suitable materials and methods which will enable the
Institution to function more effectively.
This project makes an exploratory study of the
problem. To provide a context for the study, the background
to ELT in the Department of English is reviewed. This is
followed by a detailed description of different approaches
used in ELT with the reference to the actual activities of
teaching and learning in the Department of English. A special
emphasis is placed on the difference between conventional
approaches and the currently influential one - The Functional-
Notional-Approach to language teaching and learning. The
basic notions of this approach will be covered and also
different categories of functions and categories of
situations which the students of English often encounter in
using English. Different techniques of teaching functional
spoken English will be suggested with an aim to improving the
teaching of spoken English in the above-mentioned setting.
It is hoped that this project may become a
contribution to solving some of the existing problems of
inadequate communicative competence of Vietnamese students of
English and to teaching and learning English with effective
communication skills in the Department of English at the
HFLTTC.
2
Phuc, Vu Van, and n/a. "A consideration of how the communicative approach may be used in language teaching in Vietnam." University of Canberra. Education, 1986. http://erl.canberra.edu.au./public/adt-AUC20061102.160458.
Full textAbstract:
Increasing development of the relationship between Vietnam and other
countries has resulted in a great demand for English language teaching (ELT)
throughout the country. The need is ever greater for a considerable number
of people who can use English effectively in their work. However, at present
ELT in Vietnam is still far from satisfactory. There exists a common problem
of communicative incompetence in Vietnamese learners. ELT in the Hanoi Foreign Languages Teachers' College (HFLTC) is taken to illustrate the fact
that even after five years of training, students frequently remain deficient in
the ability to actually use the language, to understand its use in normal
communication, and to carry out their teaching adequately afterwards.
That existing situation demands a critical look at ELT in all institutions to
work out suitable materials and methods to be used in the Vietnamese setting.
This work has been undertaken as an exploratory study of this problem. To
provide a context for the study, the background to ELT in Vietnam is
reviewed. Following it is a detailed description of different approaches used
in ELT with reference to the teaching and learning situations in Vietnam.
Special emphasis is placed on the differences between conventional
approaches and the currently influential one - the Communicative Approach.
A detailed comparison is made between two lessons taken from structuralbased
and functional/notional-based textbooks representing two distinct
approaches. This comparison will be examined from the methodological point
of view, investigating, for example, how language is treated in the two
approaches, how different types of activities are used, and the role of teacher
and learner in the two approaches in order to highlight a possible fresh
approach for Vietnamese coursebook designers, teachers and learners in ELT.
A sample lesson based on the Communicative Approach is finally provided to
assist any attempts to teach and learn English communicatively.
It is hoped that this survey will contribute to reducing the existing problem
of inadequate communicative competence in Vietnamese learners.
3
Loan, Nguyen Kim, and n/a. "Listening comprehension tests for intermediate students at Hanoi Foreign Languages College." University of Canberra. Education, 1989. http://erl.canberra.edu.au./public/adt-AUC20060818.141820.
Full textAbstract:
In Vietnam today there is an urgent demand for well-designed tests
of listening comprehension. Little attention has been given to this
problem. This field study is intended to provide guidance on the
design of listening comprehension tests and in particular for
intermediate level students at the Hanoi Foreign Language College
(HFLC).
The Field Study Report consists of six chapters. Chapter One gives a
brief introduction which covers the problem, aims, subjects
(testees) and the background of the Field Study Report.
Chapter Two deals with the purposes of testing in some detail,
setting this in the framework of the teaching-testing link, teachers
and testing, and students and testing. Test characteristics are
considered and the problem of sampling for test content is addressed.
Chapter Three concerns test items for listening comprehension. The
chapter begins with a short description of listening comprehension
and is followed by a survey of theorists on listening comprehension
together with the test items for listening that they suggest. Some
commonly-used standardised tests and their listening items are
discussed.
The chapter ends with a checklist of selected listening items
suitable for students at HFLC in Vietnam.
Chapter Four discusses the designing and trialling of test items for
listening comprehension, such as multiple choice, completion of a
taped talk, matching pictures with statements etc. The chapter
presents the results of the trialling of sample items and also deals
with correlations between the sample tests used.
Chapter Five deals with test design and development in general. It
clarifies the bases for test design and provides a checklist of
steps in the development of tests. In addition, the chapter includes
a resources inventory for listening test items.
Chapter Six presents the conclusions of the Field Study Report.
4
Loc, Ton That Tung, and n/a. "Assessing the spoken English of Vietnamese EFL teacher-trainees." University of Canberra. Education, 1989. http://erl.canberra.edu.au./public/adt-AUC20060818.142405.
Full textAbstract:
This study examines the problems of constructing and
administering a test of spoken English for Vietnamese EFL teacher-trainees. In
an attempt to standardize the assessment, a planned oral interview was pilottested
with a group of ten Vietnamese EFL teachers currently enrolled in a
Graduate Diploma Course in TESOL at the Canberra College of Advanced
Education, Australia. Results of the study indicate that the validity and reliability
of such measurement can be achieved if certain carefully outlined procedures in
planning the test and training the testers are carefully followed.
Given the close relationship between testing and teaching, it is
suggested in this study that there could be an improvement in the teaching of
spoken English to Vietnamese EFL teacher-trainees if (i) the amount of time
allocated to testing oral proficiency in the curriculum was increased, (ii)
Vietnamese EFL teachers were provided with formal training in language test
construction, and (iii) research on EFL oral testing was encouraged. Further,
this study recommends co-operation between TEFL institutions in Vietnam to
develop standard instruments for the assessment of spoken English of EFL
teacher-trainees on a national level.
5
Chien, Chih-Ching, and 簡誌慶. "Study of hflC and related genes in tellurite reduction in Pseudomonas sp. TeU." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/22618206184562580129.
Full textAbstract:
碩士元智大學
生物科技與工程研究所
99
A Pseudomonas strain TeU resistant to tellurite (TeO32-) and cadmium (Cd2+) ions was isolated from heavy-metal contaminated sediments by enrichment. Transposon mutagenesis of strain TeU resulted in mutants exhibiting Cd2+ sensitivity (Strain BU21) and one with decreased ability to reduce tellurite (strain AU08). Genes encoding an HflKC complex and an putative metallopeptidase were identified to be associated with the bacterium’s ability for tellurite reduction and cadmium resistance, respectively. We have cloned and sequenced the hflC and metallopeptidase gene of strain TeU. Metallopeptidase gene of strain TeU was cloned and expressed in E. coli in order to investigate if the protein could improve the bacterium’s ability to resist cadmium.Transmission electron microcopy was also employed for to observe metal precipoitation when strain TeU grown in the medium containing tellurite.
6
Resende, Carlos Henrique Lopes. "Proposição de um modelo de decisão multicritério para seleção de fornecedores no contexto da indústria 4.0." Master's thesis, 2019. http://hdl.handle.net/10198/23212.
Full textAbstract:
Mestrado APNOR e de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do ParanáA indústria 4.0 compreende a aplicação de diferentes soluções tecnológicas de modo que os processos de negócios em toda a cadeia produtiva sejam integrados. A realização da seleção de fornecedores considerando os requisitos da indústria 4.0 é essencial na promoção de estratégias colaborativas entre fornecedores e fabricantes. Nesse enquadramento, por meio de uma revisão sistemática, foram caracterizados os estudos que propuseram modelos quantitativos para apoiar a seleção de fornecedores no contexto da indústria 4.0. No entanto, não foram encontrados modelos que empreguem critérios de avaliação de fornecedores relacionados a requisitos advindos da indústria 4.0, e que consideram a dificuldade de coletar dados para medir o desempenho dos fornecedores. Assim sendo, a fim de preencher a lacuna de pesquisa identificada, este estudo propõe um modelo de decisão para apoiar a seleção de critérios e fornecedores, com base na combinação de Hesitant Fuzzy Linguistic Term Set (HFLTS) com o método Quality Function Deployment (QFD) considerando um conjunto de critérios definidos a partir de requisitos advindos da indústria 4.0. Para isso, um modelo computacional foi desenvolvido no MS Excel e aplicado em um caso ilustrativo utilizando dados simulados. Por meio dos resultados da aplicação, é possível constatar a capacidade do método em apoiar a tomada de decisão em grupo e considerar pesos diferentes para os julgamentos dos decisores na escolha dos critérios e na avaliação dos fornecedores. A sensibilidade nos parâmetros de saída do modelo às alterações nos parâmetros de entrada sugere efetividade do modelo proposto.
Industry 4.0 comprises the application of different technological solutions so that business processes throughout the integrated production chain. Carrying out the selection of suppliers considering the requirements of industry 4.0 is essential in the promotion of collaborative collaborators between suppliers and manufacturers. In this context, through a systematic review, studies were characterized that proposed quantitative models to support the selection of suppliers in the context of industry 4.0. However, no models were found that use supplier evaluation criteria related to requirements arising from industry 4.0, and which consider it a difficulty to collect data to assess supplier performance. Therefore, in order to fill an identified research gap, this study proposes a decision model to support a selection of criteria and suppliers, based on the combination of Hesitant Fuzzy Linguistic Term Set (HFLTS) with the Quality Function Deployment (QFD) method considering a set of criteria defined from the requirements arising from industry 4.0. For this, a computational model was developed in MS Excel and applied in an illustrative case using simulated data. Through the results of the application, it is possible to verify the capacity of the method to support group decision making and consider different weights for the judgments of decision makers in the choice of criteria and in the evaluation of suppliers. The sensitivity of the model's output parameters to changes in the input parameters, the effectiveness of the proposed model.
Book chapters on the topic "HFLTTC"
1
Mohammadian, M. "Designing Unsupervised Hierarchical Fuzzy Logic Systems." In Machine Learning, 253–61. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-60960-818-7.ch210.
Full textAbstract:
Systems such as robotic systems and systems with large input-output data tend to be difficult to model using mathematical techniques. These systems have typically high dimensionality and have degrees of uncertainty in many parameters. Artificial intelligence techniques such as neural networks, fuzzy logic, genetic algorithms and evolutionary algorithms have created new opportunities to solve complex systems. Application of fuzzy logic [Bai, Y., Zhuang H. and Wang, D. (2006)] in particular, to model and solve industrial problems is now wide spread and has universal acceptance. Fuzzy modelling or fuzzy identification has numerous practical applications in control, prediction and inference. It has been found useful when the system is either difficult to predict and or difficult to model by conventional methods. Fuzzy set theory provides a means for representing uncertainties. The underlying power of fuzzy logic is its ability to represent imprecise values in an understandable form. The majority of fuzzy logic systems to date have been static and based upon knowledge derived from imprecise heuristic knowledge of experienced operators, and where applicable also upon physical laws that governs the dynamics of the process. Although its application to industrial problems has often produced results superior to classical control, the design procedures are limited by the heuristic rules of the system. It is simply assumed that the rules for the system are readily available or can be obtained. This implicit assumption limits the application of fuzzy logic to the cases of the system with a few parameters. The number of parameters of a system could be large. The number of fuzzy rules of a system is directly dependent on these parameters. As the number of parameters increase, the number of fuzzy rules of the system grows exponentially. Genetic Algorithms can be used as a tool for the generation of fuzzy rules for a fuzzy logic system. This automatic generation of fuzzy rules, via genetic algorithms, can be categorised into two learning techniques, supervised and unsupervised. In this paper unsupervised learning of fuzzy rules of hierarchical and multi-layer fuzzy logic control systems are considered. In unsupervised learning there is no external teacher or critic to oversee the learning process. In other words, there are no specific examples of the function to be learned by the system. Rather, provision is made for a task-independent measure of the quality or representation that the system is required to learn. That is the system learns statistical regularities of the input data and it develops the ability to learn the feature of the input data and thereby create new classes automatically [Mohammadian, M., Nainar, I. and Kingham, M. (1997)]. To perform unsupervised learning, a competitive learning strategy may be used. The individual strings of genetic algorithms compete with each other for the “opportunity” to respond to features contained in the input data. In its simplest form, the system operates in accordance with the strategy that ‘the fittest wins and survives’. That is the individual chromosome in a population with greatest fitness ‘wins’ the competition and gets selected for the genetic algorithms operations (cross-over and mutation). The other individuals in the population then have to compete with fit individual to survive. The diversity of the learning tasks shown in this paper indicates genetic algorithm’s universality for concept learning in unsupervised manner. A hybrid integrated architecture incorporating fuzzy logic and genetic algorithm can generate fuzzy rules for problems requiring supervised or unsupervised learning. In this paper only unsupervised learning of fuzzy logic systems is considered. The learning of fuzzy rules and internal parameters in an unsupervised manner is performed using genetic algorithms. Simulations results have shown that the proposed system is capable of learning the control rules for hierarchical and multi-layer fuzzy logic systems. Application areas considered are, hierarchical control of a network of traffic light control and robotic systems. A first step in the construction of a fuzzy logic system is to determine which variables are fundamentally important. Any number of these decision variables may appear, but the more that are used, the larger the rule set that must be found. It is known [Raju, S., Zhou J. and Kisner, R. A. (1990), Raju G. V. S. and Zhou, J. (1993), Kingham, M., Mohammadian, M, and Stonier, R. J. (1998)], that the total number of rules in a system is an exponential function of the number of system variables. In order to design a fuzzy system with the required accuracy, the number of rules increases exponentially with the number of input variables and its associated fuzzy sets for the fuzzy logic system. A way to avoid the explosion of fuzzy rule bases in fuzzy logic systems is to consider Hierarchical Fuzzy Logic Control (HFLC) [Raju G. V. S. and Zhou, J. (1993)]. A learning approach based on genetic algorithms [Goldberg, D. (1989)] is discussed in this paper for the determination of the rule bases of hierarchical fuzzy logic systems.
Conference papers on the topic "HFLTTC"
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Jimmy, Hendry, Sukiman, Johanes Terang Kita Perangin Angin, Lili Suryati, and Lusiah. "Decision Support System with the HFLTS Method in Student Achievement Selection." In 2020 3rd International Conference on Mechanical, Electronics, Computer, and Industrial Technology (MECnIT). IEEE, 2020. http://dx.doi.org/10.1109/mecnit48290.2020.9166639.
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Montes, Rosana, Ana M. Sanchez, Pedro Villar, and Francisco Herrera. "A decision making model to evaluate the reputation in social networks using HFLTS." In 2017 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE). IEEE, 2017. http://dx.doi.org/10.1109/fuzz-ieee.2017.8015519.
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Chen, Zhen-Song. "Sustainable supplier selection using two-phase QFD and TOPSIS within PD-HFLTS context." In Conference on Data Science and Knowledge Engineering for Sensing Decision Support (FLINS 2018). WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813273238_0147.
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Sukiman, Hendry, Jimmy, Sugianto, Waisen, and Lili Suryati. "Decision Support System for Academic Administration Staff Achievement in STMIK IBBI Using TOPSIS-HFLTS Method." In 2020 3rd International Conference on Mechanical, Electronics, Computer, and Industrial Technology (MECnIT). IEEE, 2020. http://dx.doi.org/10.1109/mecnit48290.2020.9166660.
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Ding, Quanyu, and Yingming Wang. "HFLT-TODIM Approach to Emergency Decision Making Based on Choquet Integral." In 2019 IEEE 14th International Conference on Intelligent Systems and Knowledge Engineering (ISKE). IEEE, 2019. http://dx.doi.org/10.1109/iske47853.2019.9170282.
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Hafez, Ahmed Taimour, Mohamed A. Kamel, Peter T. Jardin, and Sidney N. Givigi. "Task assignment/trajectory planning for unmanned vehicles via HFLC and PSO." In 2017 International Conference on Unmanned Aircraft Systems (ICUAS). IEEE, 2017. http://dx.doi.org/10.1109/icuas.2017.7991407.
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