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A consensus model for group decision making under interval type-2 fuzzy environment

Xiao-xiong ZHANG,Bing-feng GE,Yue-jin TAN

《信息与电子工程前沿（英文）》 2016年第17卷第3期页码 237-249 doi: 10.1631/FITEE.1500198

摘要： We propose a new consensus model for group decision making (GDM) problems, using an interval type-2 fuzzy environment. In our model, experts are asked to express their preferences using linguistic terms characterized by interval type-2 fuzzy sets (IT2 FSs), because these can provide decision makers with greater freedom to express the vagueness in real-life situations. Consensus and proximity measures based on the arithmetic operations of IT2 FSs are used simultaneously to guide the decision-making process. The majority of previous studies have taken into account only the importance of the experts in the aggregation process, which may give unreasonable results. Thus, we propose a new feedback mechanism that generates different advice strategies for experts according to their levels of importance. In general, experts with a lower level of importance require a larger number of suggestions to change their initial preferences. Finally, we investigate a numerical example and execute comparable models and ours, to demonstrate the performance of our proposed model. The results indicate that the proposed model provides greater insight into the GDM process.

关键词： Group decision making (GDM) Interval type-2 fuzzy sets (IT2 FSs) Feedback mechanism

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An interval type-2 fuzzy logic controller for TCSC to improve the damping of power system oscillations

Manoj Kumar PANDA, Gopinath PILLAI, Vijay KUMAR

《能源前沿（英文）》 2013年第7卷第3期页码 307-316 doi: 10.1007/s11708-013-0269-3

摘要： In this paper an interval type-2 fuzzy logic controller (IT2FLC) was proposed for thyristor controlled series capacitor (TCSC) to improve power system damping. For controller design, memberships of system variables were represented using interval type-2 fuzzy sets. The three-dimensional membership function of type-2 fuzzy sets provided additional degree of freedom that made it possible to directly model and handle uncertainties. Simulations conducted on a single machine infinite bus (SMIB) power system showed that the proposed controller was more effective than particle swarm optimization (PSO) tuned and type-1 fuzzy logic (T1FL) based damping controllers. Robust performance of the proposed controller was also validated at different operating conditions, various disturbances and parameter variation of the transmission line parameters.

关键词： power system oscillations thyristor controlled series capacitor (TCSC) type-2 fuzzy logic system interval type-2 fuzzy logic controller (IT2FLC)

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每个输入具有两个非线性模糊集合的区间二型模糊控制器解析结构的推导与分析 Article

Bin-bin LEI,Xue-chao DUAN,Hong BAO,Qian XU

《信息与电子工程前沿（英文）》 2016年第17卷第6期页码 587-602 doi: 10.1631/FITEE.1601019

摘要：二型模糊控制器一直被视为“黑盒”，因此揭示二型模糊控制器的解析结构不仅能够加深对二型模糊控制器内部工作原理的理解，而且能够对控制器进行更加系统的分析和设计。本文推导并分析了一种区间二型模糊控制器的解析结构。该区间二型模糊控制器具有以下结构特点：每个输入采用两个非线性区间二型模糊集合模糊化、规则后件为区间二型单点模糊集合、扎德AND算子和Karnik-Mendel(KM)降型器。其次，通过将区间二型模糊控制器的输入空间划分为15个分区并推导每个分区上的输入输出关系，证明文中区间二型模糊控制器近似等效为具有变增益的非线性PI或PD控制器。再者，通过与对应一型模糊控制器的解析结构进行对比，分析了文中区间二型模糊控制器的潜在优势。最后，通过仿真和实验验证了理论分析结果的可靠性和文中区间二型模糊集合的有效性。

关键词：区间二型模糊控制器；解析结构；Karnik-Mendel降型

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探测高超声速滑翔飞行器的区间二型模糊逻辑雷达任务优先级分配方法 Research Articles

孟繁卿1,田康生2

《信息与电子工程前沿（英文）》 2022年第23卷第3期页码 488-501 doi: 10.1631/FITEE.2000560

摘要：针对相控阵雷达探测临近空间高超声速滑翔飞行器时的资源管理问题，设计了一种基于区间二型模糊逻辑系统的雷达任务优先级分配方法。详细阐述了雷达任务数学模型、高超声速滑翔目标的运动模型和探测模型。将高超声速滑翔飞行器的目标威胁划分为机动威胁、速度威胁、方位威胁和距离威胁。此方法中，机动因子、速度、方位、距离和初始优先级为输入变量，雷达任务优先级为输出变量。为减少模糊规则数、避免规则爆炸，设计了分层结构的区间二型模糊逻辑系统。最后，通过仿真验证该方法可行性。结果表明，基于区间二型模糊逻辑系统的任务优先级分配方法具有更高的精确跟踪率、平均初始优先级和目标威胁度以及更短的偏移时间。

关键词：高超声速滑翔飞行器；相控阵雷达；区间二型模糊逻辑系统；优先级分配

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New practice in semaglutide on type-2 diabetes and obesity: clinical evidence and expectation

《医学前沿（英文）》 2022年第16卷第1期页码 17-24 doi: 10.1007/s11684-021-0873-2

摘要： Obesity is an important risk factor of type 2 diabetes (T2D), which has become an important factor threatening human health. However, no perfect drug choice for obesity exists. Semaglutide is a kind of human glucagon-like peptide-1 (GLP-1) analog that promotes insulin secretion while inhibiting glucagon secretion through a glucose concentration-dependent mechanism. GLP-1 can also delay stomach emptying and suppress appetite to help lose weight. This review summarizes clinical evidence of the semaglutide effect on T2D and obesity and establishes expectations on future clinical trials for obesity treatment.

关键词： semaglutide type 2 diabetes obesity

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Improved approach to quality function deployment based on Pythagorean fuzzy sets and application to assembly

Huchang LIAO, Yinghan CHANG, Di WU, Xunjie GOU

《工程管理前沿（英文）》 2020年第7卷第2期页码 196-203 doi: 10.1007/s42524-019-0038-z

摘要： Quality function deployment (QFD) is an effective method that helps companies analyze customer requirements (CRs). These CRs are then turned into product or service characteristics, which are translated to other attributes. With the QFD method, companies could design or improve the quality of products or services close to CRs. To increase the effectiveness of QFD, we propose an improved method based on Pythagorean fuzzy sets (PFSs). We apply an extended method to obtain the group consensus evaluation matrix. We then use a combined weight determining method to integrate former weights to objective weights derived from the evaluation matrix. To determine the exact score of each PFS in the evaluation matrix, we develop an improved score function. Lastly, we apply the proposed method to a case study on assembly robot design evaluation.

关键词： quality function deployment Pythagorean fuzzy sets group consensus combined weights assembly robot design

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Personalized medicine of type 2 diabetes

null

《医学前沿（英文）》 2013年第7卷第1期页码 1-3 doi: 10.1007/s11684-013-0241-y

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一种模糊Rough决策方法

罗党

《中国工程科学》 2004年第6卷第12期页码 32-36

摘要：

利用模糊集理论和粗糙集理论在处理不确定性和不精确性问题方面侧重点的差异性，构造一种组合决策模型。该模型从问题领域内的部分不精确信息出发利用模糊聚类方法构造一个决策信息系统，利用粗糙集理论关于决策规则的约简方法从决策信息系统中提取（挖掘）决策规则，使之适用于问题的整个领域。

关键词：模糊聚类粗糙集决策表决策规则

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An overview on the applications of the hesitant fuzzy sets in group decision-making: Theory, support

Zeshui XU, Shen ZHANG

《工程管理前沿（英文）》 2019年第6卷第2期页码 163-182 doi: 10.1007/s42524-019-0017-4

摘要： Due to the characteristics of hesitant fuzzy sets (HFSs), one hesitant fuzzy element (HFE), which is the basic component of HFSs, can express the evaluation values of multiple decision makers (DMs) on the same alternative under a certain attribute. Thus, the HFS has its unique advantages in group decision making (GDM). Based on which, many scholars have conducted in-depth research on the applications of HFSs in GDM. We have viewed lots of relevant literature and divided the existing studies into three categories: theory, support and methods. In this paper, we elaborate on hesitant fuzzy GDM from these three aspects. The first aspect is mainly about the introduction of HFSs, HFPRs and some hesitant fuzzy aggregation operators. The second aspect describes the consensus process under hesitant fuzzy environment, which is an important support for a complete decision-making process. In the third aspect, we introduce seven hesitant fuzzy GDM approaches, which can be applied in GDM under different decision-making conditions. Finally, we summarize the research status of hesitant fuzzy GDM and put forward some directions of future research.

关键词： hesitant fuzzy set hesitant fuzzy preference relation group decision-making

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Metabolomics in human type 2 diabetes research

null

《医学前沿（英文）》 2013年第7卷第1期页码 4-13 doi: 10.1007/s11684-013-0248-4

摘要：

The high prevalence of diabetes and diabetic complications has caused a huge burden on the modern society. Although scientific advances have led to effective strategies for preventing and treating diabetes over the past several decades, little progress has been made toward curing the disease or even getting it under control, from a public health and overall societal standpoint. There is still a lack of reliable biomarkers indicative of metabolic alterations associated with diabetes and different drug responses, highlighting the need for the development of early diagnostic and prognostic markers for diabetes and diabetic complications. The emergence of metabolomics has allowed researchers to systemically measure the small molecule metabolites, which are sensitive to the changes of both environmental and genetic factors and therefore, could be regarded as the link between genotypes and phenotypes. During the last decade, the progression made in metabolomics has provided insightful information on disease development and disease onset prediction. Recent studies using metabolomics approach coupled with statistical tools to predict incident diabetes revealed a number of metabolites that are significantly altered, including branched-chain and aromatic amino acids, such as isoleucine, leucine, valine, tyrosine and phenylalanine, as diagnostic or highly-significant predictors of future diabetes. This review summarizes the current findings of metabolomic studies in human investigations with the most common form of diabetes, type 2 diabetes.

关键词： metabolomics type 2 diabetes metabolic pathway mass spectrometry nuclear magnetic resonance (NMR)

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The mechanisms linking adiposopathy to type 2 diabetes

null

《医学前沿（英文）》 2013年第7卷第4期页码 433-444 doi: 10.1007/s11684-013-0288-9

摘要：

Obesity is defined as excessive accumulation of body fat in proportion to body size. When obesity occurs, the functions of adipose tissue may be deregulated, which is termed as adiposopathy. Adiposopathy is an independent risk factor for many diseases, including diabetes and cardiovascular diseases. In overweight or obese subjects with adiposopathy, hyperlipidemia exerts lipotoxicity in pancreatic islet and liver and induces pancreatic β cell dysfunction and liver insulin resistance, which are the decisive factors causing type 2 diabetes. Moreover, adipokines have been shown to play important roles in the regulation of glucose homeostasis. When adiposopathy occurs, abnormal changes in the serum adipokine profile correlate with the development and progression of pancreatic β cell dysfunction and insulin resistance in peripheral tissue. The current paper briefly discusses the latest findings regarding the effects of adiposopathy-related lipotoxicity and cytokine toxicity on the development of type 2 diabetes.

关键词： obesity adiposopathy lipotoxicity adipokines diabetes

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一种基于粗糙集的模糊信息融合方法及应用

陈双叶,张微敬

《中国工程科学》 2006年第8卷第12期页码 75-79

摘要：

将粗糙集理论和模糊逻辑技术结合起来，提出了一种基于粗糙集数据处理的模糊信息融合方法。运用粗糙集的基本理论和简约计算方法，从大量原始数据中发现精简的、概略化的规则，结合模糊逻辑推理建立一致粗糙模糊模型，并提出了对模型进行扩充与完备化的概念。脉动真空灭菌温度控制过程的仿真试验研究结果表明了所提方法的有效性和可行性。

关键词：信息融合粗糙集模糊逻辑粗糙模糊模型

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Association of periodontal disease with glycemic control in patients with type 2 diabetes in Indian population

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《医学前沿（英文）》 2017年第11卷第1期页码 110-119 doi: 10.1007/s11684-016-0484-5

摘要：

This study aims to investigate the link between glycated hemoglobin and diabetic complications with chronic periodontitis. A total of 207 patients with type 2 diabetes and chronic periodontitis (CP) were divided according to tertiles of mean PISA (periodontal inflamed surface area) scores as low, middle and high PISA groups. Simultaneously a group of 67 periodontally healthy individuals (PH) was recruited. Periodontal examinations, including full-mouth assessment of probing depths (PPD), bleeding on probing, clinical attachment level and plaque scores were determined. Blood analyses were carried out for glycated hemoglobin (HbA_1c), fasting plasma glucose (FPG), 2 h post parandial glucose (PPG). Individuals in PH group had significantly better glycemic control than CP group. Upon one-way analysis of variance, subjects with increased PISA had significantly higher HbA_1c levels, retinopathy and nephropathy (P<0.05). After controlling for age, gender, body mass index (BMI), socioeconomic status (SES), family history of diabetes and periodontitis, duration of diabetes, the mean PISA in mm², PPD 4--6 mm (%) and PPD≥7 mm (%) emerged as significant predictors for elevated HbA_1c in regression model (P<0.05). Logistic regression analysis revealed that PISA was associated with higher risk of having retinopathy and neuropathy (odds ratio). In our study, the association between glycemic control and diabetic complications with periodontitis was observed.

关键词： type 2 diabetes mellitus hemoglobin A glycated chronic periodontitis

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Transplantation of placenta-derived mesenchymal stem cells in type 2 diabetes: a pilot study

null

《医学前沿（英文）》 2011年第5卷第1期页码 94-100 doi: 10.1007/s11684-011-0116-z

摘要：

Mesenchymal stem cells (MSC) have been used in clinical trials for severe diabetes, a chronic disease with high morbidity and mortality. Bone marrow is the traditional source of human MSC, but human term placenta appears to be an alternative and more readily available source. Here, the therapeutic effect of human placenta-derived MSC (PD-MSC) was studied in type 2 diabetes patients with longer duration, islet cell dysfunction, high insulin doses as well as poor glycemic control in order to evaluate the safety, efficacy and feasibility of PD-MSC treatment in type 2 diabetes (T2D). Ten patients with T2D received three intravenous infusions of PDSC, with one month interval of infusion. The total number of PDSC for each patient was (1.22–1.51) × 10⁶/kg, with an average of 1.35 × 10⁶/kg. All of the patients were followed up after therapy for at least 3 months. A daily mean dose of insulin used in 10 patients was decreased from 63.7?±?18.7 to 34.7?±?13.4 IU (P<0.01), and the C-peptide level was increased from 4.1?±?3.7 ng/mL to 5.6?±?3.8 ng/mL (P<0.05) respectively after therapy. In 4 of 10 responders their insulin doses reduced more than 50% after infusion. The mean levels of insulin and C-peptide at each time point in a total of 10 patients was higher after treatment (P<0.05). No fever, chills, liver damage and other side effects were reported. The renal function and cardiac function were improved after infusion. The results obtained from this pilot clinical trial indicate that transplantation of PD-MSC represents a simple, safe and effective therapeutic approach for T2D patients with islet cell dysfunction. Further large-scale, randomized and well-controlled clinical studies will be required to substantiate these observations.

关键词： placenta stem cells treatment of type 2 diabetes

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Effectiveness of quality of care for patients with type 2 diabetes in China: findings from the Shanghai

《医学前沿（英文）》 2022年第16卷第1期页码 126-138 doi: 10.1007/s11684-021-0897-7

摘要： This cross-sectional study aimed to investigate the quality of care of diabetes in Shanghai, China. A total of 173 235 patients with type 2 diabetes in 2017 were included in the analysis. Profiles of risk factors and intermediate outcomes were determined. The patients had a mean age of 66.43±8.12 (standard deviation (SD)) years and a mean diabetes duration of 7.95±5.53 (SD) years. The percentage of patients who achieved the target level for HbA_1c (<7.0%) was 48.6%. Patients who achieved the target levels for blood pressure (BP)<130/80 mmHg and low-density lipoprotein-cholesterol (LDL-c)<2.6 mmol/L reached 17.5% and 34.0%, respectively. A total of 3.8% achieved all three target levels, and the value increased to 6.8% with an adaptation of the BP target level (<140/90 mmHg) for those over 65 years. Multivariable analysis identified the factors associated with a great likelihood of achieving all three target levels: male, young age, short diabetes duration, low body mass index, macrovascular complications, no microvascular complications, prescribed with lipid-lowering medication, and no prescription of antihypertensive medication. In conclusion, nearly 50% and one-third of the patients with diabetes met the target levels for HbA_1c and LDL-c, respectively, with a low percentage achieving the BP target level. The percentage of patients who achieved all three target levels needs significant improvement.

关键词： type 2 diabetes quality of care macrovascular complication microvascular complication treatment pattern epidemiology