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Fuzzy decision implications: interpretation within fuzzy decision context

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CAAI Transactions on Intelligence Technology 2019年第4期4卷 231-236页

作者： Jing Zhang Yanhui Zhai deyu li School of Foreign Language Shanxi UniversityTaiyuan 030006ShanxiPeople’s Republic of China Key Laboratory of Computational Intelligence and Chinese Information Processing of Ministry of Education School of Computer and Information TechnologyShanxi UniversityTaiyuan 030006ShanxiPeople’s Republic of China

Fuzzy decision implication is an extension of decision implication in the fuzzy setting,serving to uncover the dependencies of fuzzy *** study presents the interpretation of fuzzy decision implication in the fuzzy decision ***,they will show that from fuzzy decision contexts one can obtain a closed fuzzy set of fuzzy decision implications,and the semantical characteristic of the obtained fuzzy set can be interpreted by fuzzy decision context and can be represented by some operators of fuzzy decision ***,starting from a fuzzy set of fuzzy decision implications,they can form a fuzzy decision context,from which the given fuzzy set can be *** result actually implies that they have constructed a correspondence between closed fuzzy sets of fuzzy decision implications and fuzzy decision contexts,and thus shows the equivalence of two interpretations of fuzzy decision implications.

关键词： Fuzzy operators implies

Corrosion protection properties of vanadium films formed on zinc surfaces

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Rare Metals 2011年第2期30卷 146-149页

作者： ZOU Zhongli liNing li deyu Department of Applied Chemistry School of Chemical Engineering ＆ Technology Harbin Institute of Technology Harbin 150001 China

Vanadium films were prepared on zinc surfaces by using a solution containing vanadate. Corrosion protection properties of vanadium-treated （V-treated）, chromium-treated （Cr-treated）, and untreated zinc surfaces in contact with a 3.5 wt.% NaC1 solution were studied using potentiodynamic polarization, electrochemical impedance spectroscopy （EIS）, and neutral salt spray （NSS） tests. According to these results, the V-treated layer significantly improved the corrosion resistance of zinc surfaces. In comparison with the Cr-treated layer, the V-treated layer exhibited a better corrosion resistance. The composition of the V-treated layer was studied using X-ray photoelectron spectroscopy （XPS）. XPS measurements indicated that the vanadium layer formed on zinc surfaces and the vanadium-rich coating was a hydrated oxide with a composition of V2O5, VO2, and its hydrates such as ***2O and VO（OH）2.

关键词： corrosion protection surface treatment zinc vanadium thin films corrosion resistance

Fast optical wavefront engineering for controlling light propagation in dynamic turbid media

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Journal of Innovative Optical Health Sciences 2019年第4期12卷 46-66页

作者： Meiyun Xia deyu li ling Wang Daifa Wang School of Biological Science and Medical Engineering Beihang University Beijing100083P.R.China Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing100083P.R.China State Key Laboratory of Virtual Reality Technology and System Beihang University Beijing100083P.R.China College of Computer Science Sichuan Normal University Chengdu610101P.R.China

While propagating inside the strongly scattering biological tssue,photons lose their incident directions beyond one transport mean free path(TMFP,~1 millimeter(mm)),which makes it challenging to achieve optical focusing or clear imaging deep inside *** manipulating many degrees of the incident optical wavefront,the latest optical wavefront engineering(WFE)technology compensates the wavelfront distortions caused by the scattering media and thus is toward breaking this physical limit,bringing bright perspective to many applications deep inside tissue,eg,high resolution functional/molecular imaging,optical excitation(optogenetics)and optical ***,inside the dynamic turbid media such as the biological tissue,the wavefront distortion is a fast and continuously changing process whose decorrelation rate is on timescales from milliseconds(ms)to microseconds(μs),or even *** requires that the WFE technology should be capable of beating this rapid *** this review,we discuss the major challenges faced by the WFE technology due to the fast decorrelation of dynamic turbid media such as living tissue when achieving light focusing/imaging and summarize the research progress achieved to date to overcome these challenges.

关键词： Fast wavefront engineering optical phase conjugation feedback-based iterative wavefront optimization transmission matrix decorrelation time

An Update Method of Decision Implication Canonical Basis on Attribute Granulating

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Intelligent Automation & Soft Computing 2023年第8期37卷 1833-1851页

作者： Yanhui Zhai Rujie Chen deyu li School of Computer and Information Technology Shanxi UniversityTaiyuanShanxi Province030006China Key Laboratory of Computational Intelligence and Chinese Information Processing of Ministry of Education Shanxi UniversityTaiyuanShanxi Province030006China

Decision implication is a form of decision knowledge represen-tation,which is able to avoid generating attribute implications that occur between condition attributes and between decision *** with other forms of decision knowledge representation,decision implication has a stronger knowledge representation *** granularization may facilitate the knowledge extraction of different attribute granularity layers and thus is of application *** implication canonical basis(DICB)is the most compact set of decision implications,which can efficiently represent all knowledge in the decision *** order to mine all deci-sion information on decision context under attribute granulating,this paper proposes an updated method of *** this end,the paper reduces the update of DICB to the updates of decision premises after deleting an attribute and after adding granulation attributes of some *** on this,the paper analyzes the changes of decision premises,examines the properties of decision premises,designs an algorithm for incrementally generating DICB,and verifies its effectiveness through *** real life,by using the updated algorithm of DICB,users may obtain all decision knowledge on decision context after attribute granularization.

关键词： Decision context attribute granulating decision implication decision implication canonical basis

A New Rational-based Optimal Design Strategy of Ship Structure Based on Multi-level Analysis and Super-element Modeling Method

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Journal of Marine Science and Application 2011年第3期10卷 272-280页

作者： li Sun deyu Wang State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200030 China

A new multi-level analysis method of introducing the super-element modeling method, derived from the multi-level analysis method first proposed by O. F. Hughes, has been proposed in this paper to solve the problem of high time cost in adopting a rational-based optimal design method for ship structural design. Furthermore,the method was verified by its effective application in optimization of the mid-ship section of a container ship. A full 3-D FEM model of a ship,suffering static and quasi-static loads, was used as the analyzing object for evaluating the structural performance of the mid-ship module, including static strength and buckling performance. Research results reveal that this new method could substantially reduce the computational cost of the rational-based optimization problem without decreasing its accuracy, which increases the feasibility and economic efficiency of using a rational-based optimal design method in ship structural design.

关键词： rational-based optimal design method (RBODM) multi-level analysis super-element ship module genetic algorithm

An accelerator for the logistic regression algorithm based on sampling on-demand

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Science China(Information Sciences) 2020年第6期63卷 226-228页

作者： Jiye liANG Yunsheng SONG deyu li Zhiqiang WANG Chuangyin DANG Key Laboratory of Computational Intelligence and Chinese Information Processing of Ministry of Education School of Computer and Information Technology Shanxi University College of Information Science and Engineering Shandong Agricultural University Department of Systems Engineering and Engineering Management City University of Hong Kong

Dear editor,Training a logistic regression classifier is equivalent to solving a convex optimization problem, which is frequently solved with gradient descent (GD). As the gradient is computed using all the data, using GD is very time-consuming when the dataset is large [1, 2]. To accelerate the GD algorithm,stochastic gradient descent (SGD) estimates the gradient using only one training data point, which

关键词： SOD An accelerator for the logistic regression algorithm based on sampling on-demand logistic

Shifts in intrinsic neural timescale of hippocampus support the maturation of inhibitory control and working memory in youth

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Medicine in Novel Technology and Devices 2024年第2期22卷 115-123页

作者： Debin Zeng Qiongling li deyu li Shuyu li Beijing Advanced Innovation Center for Biomedical Engineering School of Biological Science&Medical EngineeringBeihang UniversityBeijing100083China State Key Laboratory of Cognitive Neuroscience and Learning Beijing Normal UniversityBeijing100875China Beijing Key Laboratory of Brain Imaging and Connectomics Beijing Normal UniversityBeijing100875China IDG/McGovern Institute for Brain Research Beijing Normal UniversityBeijing100875China State Key Laboratory of Virtual Reaility technology and Systems Beihang UniversityBeijing100083China

The intrinsic neural timescale(INT)provides temporal windows in brain activity that process information of different durations,crucial for the integration and segregation of external inputs and ultimately shaping cognition and *** research has uncovered a pronounced INT hierarchy along the adult hippocampus's long***,the development of INT organization within the hippocampus—particularly the pattern of its hierarchical structure and its impact on cognitive development—has not been thoroughly investigated in ***,we discovered that the INT distribution in youth presents a distinct hierarchical structure along both posterioranterior and proximal-distal axes of the ***,this hierarchical structure correlates signifi-cantly with the first principal gradient of the hippocampal-cortical functional connectome and the thickness of hippocampal grey ***,we observed notable changes in the hippocampal INT landscape during youth,characterized by a general narrowing of timescales,alongside dedifferentiation along the hippocampal organizational *** maturational changes significantly link to improvements in inhibitory control and working memory ***,our findings reveal the developmental patterns of temporal integration and segregation hierarchies within hippocampus,and highlights the profound significance of INT as a neural underpinning that orchestrates cognitive growth.

关键词： Intrinsic neural timescale Hippocampus Development Inhibitory control and working memory

Determination of delay time in individual transfer function for central aortic pressure reconstruction

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Science China(life Sciences) 2014年第10期57卷 1034-1038页

作者： YU DanYang XIANG HaiYan li deyu WANG YuQi YU MengSun School of Biological Science and Medical Engineering Beihang University Department of Medical Engineering the 201st Hospital of the Chinese Peoples' s Liberation Army Department of Aviation Medical Engineering Institute of Aviation Medicine

In previous research, time-delay （△t） was a more important parameter than the reflection coefficient in the individual transfer function of central aortic pressure reconstruction. The At can be obtained by electrocardiography （ECG） or phonocardiography （PCG）. Because the pre-ejection period remains an uncertain factor, the present study used ECG and PCG to define the delay time and analyzed the accuracy of the reconstruction results. The △tpre is the actual delay time derived from the aorta to the carotid pressure wave, △tpco is the time delay between the aortic valve component of the second heart sound and the dicrotic incisura of the carotid pressure wave, and AtEcc represents the delay from the interval of the ECG R-peak to the foot of the carotid pressure wave. Compared with the measured aortic pressure, the reconstruction result obtained by △t=△tpcslightly differed from the best result estimated by △t=△tpre. However, the differences between the result obtained by △t=△tEco and the best result were significant in terms of the diastolic blood pressure, and pulse pressure, and especially in terms of the augmentation index and root-mean-square-error. Thus, the At should be determined by PCG for central aortic pressure reconstruction in practice.

关键词： central aortic pressure delay time PCG ECG

Application of multiscale coupling models in the numerical study of circulation system

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Medicine in Novel Technology and Devices 2022年第2期14卷 67-76页

作者： Zhang Chi lin Beile li deyu Fan Yubo Advanced Innovation Center for Biomedical Engineering Key Laboratory of Ministry of Education for Biomechanics and MechanobiologySchool of Biological Science and Medical EngineeringBeihang UniversityBeijing100191China State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing100083China

Cardiovascular diseases have become a serious threat to human health *** the rapid development of computer technology and medical imaging technology,the method of numerical simulation has become the main tool to explore the mechanism of cardiovascular diseases and to optimize the treatment *** cardiovascular system is a complex vascular network with multiscale characteristics,and the local hemodynamic phenomena in blood vessels is closely related to the overall blood flow distribution of the *** hemodynamic characteristics in the local vessel and circulation system influences each ***,the traditional single-scale modeling method cannot accurately describe the real blood flow in blood *** the numerical simulation of multiscale coupling model can effectively solve this *** this paper,the main methods of hemodynamic modeling in recent years are summarized,including lumped parameter model(0D model),distributed parameter model(1D model)and finite element model of(3D model),and their applications in cardiovascular *** this basis,the principles of several commonly used multiscale coupling models and their applications in cardiovascular disease researches and clinical practice are introduced,including 1D-0D,3D-0D,and 3D-1D coupling model.

关键词： Hemodynamics Multiscale model Cardiovascular system