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Failure Mode and Effects Analysis Based on Z-Numbers and the Graded Mean Integration Representation

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Computer Modeling in Engineering & Sciences 2023年第2期134卷 1005-1019页

作者： Hanhan Zhang Zhihui Xu Hong qian Xiaoyan su School of Automation Engineering Shanghai University of Electric PowerShanghai200090China State Key Laboratory of Nuclear Power Safety Monitorig Technology and Equipment Shenzhen518172China

Failuremode and effects analysis(FMEA)is a widely used safety assessmentmethod inmany fields.Z-number was previously applied in FMEA since it can take both possibility and reliability of information into ***,the use of fuzzy weighted mean to integrate Z-valuations may have some drawbacks and is not suitable for some *** this paper,an improved method is proposed based on Z-numbers and the graded mean integration representation(GMIR)to deal with the uncertain information in ***,Z-numbers are constructed based on the evaluations of risk factors O,S,D for each failure mode by different ***,weights of the three risk factors and experts are ***,the integration representations of Z-numbers are obtained by a newmethod based on the ***,risk priorities of the failure modes are derived considering the weights of experts and risk *** examples and a case study are given to show the use of the proposed method and comparison with other *** results show that the proposed method is more reasonable,universal and simple in calculation.

关键词： Safety assessment FMEA risk priority number Z-number the graded mean integration representation

A two-stage variable selection strategy for supersaturated designs with multiple responses

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Frontiers of Mathematics in China 2013年第3期8卷 717-730页

作者： Yuhui YIN Qiaozhen ZHANG min-qian LIU Department of Statistics School of Mathematical Sciences and LPMC Nankai University Tianjin 300071 China

A supersaturated design （SSD）, whose run size is not enough for estimating all the main effects, is commonly used in screening experiments. It offers a potential useful tool to investigate a large number of factors with only a few experimental runs. The associated analysis methods have been proposed by many authors to identify active effects in situations where only one response is considered. However, there are often situations where two or more responses are observed simultaneously in one screening experiment, and the analysis of SSDs with multiple responses is thus needed. In this paper, we propose a two-stage variable selection strategy, called the multivariate partial least squares-stepwise regression （MPLS-SR） method, which uses the multivariate partial least squares regression in conjunction with the stepwise regression procedure to select true active effects in SSDs with multiple responses. Simulation studies show that the MPLS-SR method performs pretty good and is easy to understand and implement.

关键词： Multivariate partial least squares (MPLS) supersaturated design(SSD) stepwise regression variable selection variable importance in projection

The Chang’E-1 orbiter plays a distinctive role in China’s first successful selenodetic lunar mission

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Science China(Physics,Mechanics & Astronomy) 2011年第12期54卷 2130-2144页

作者： PING JinSong su XiaoLi HUANG qian YAN JianGuo National Astronomical Observatory Chinese Academy of Sciences Beijing 100012 China Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China State Key Laboratory of lnformation Engineering in surveying Mapping and Remote Sensing Wuhan University Wuhan 430070 China

The first Chinese lunar orbiter Chang'E-1 is a successful mission with many fruitful results obtained in various disciplines. The scientific data acquired by the Chang'E-1 payloads can benefit studies of the lunar origin and evolution, as well as other relevant research areas, after careful validation of the data. Among the new results, the Chang'E-1 selenodetic products are continually uncovering characteristics of the lunar surface, undersurface and inner structure. successful lunar orbiters such as the Clementine, Lunar Prospector, KAGUYA/SELENE, Chang'E-1, Lunar Reconnaissance Orbiter and GRAIL have been revealing, with increasing clarity, global selenodetic characteristics with state-of-the-art fine resolution and high precision. In particular, the Chang'E-1 plays an important distinctive role in selenodetic exploration through enhancing lunar topography and gravity models. The gravity model has been successfully improved with a factor of two after applying the Chang'E-1 long-wavelength tracking data. Using the new models, some medium-scale lunar surface characteristics such as basins and volcanoes have been identified. Furthermore, the old mascon basins of Bouguer, gravity anomaly and craters have been discovered with the Chang'E-1 selenodetic data.

关键词： Chang’E-1 lunar orbiter lunar science selenodesy topography gravity

A new rotation method for constructing orthogonal Latin hypercube designs

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Science China Mathematics 2023年第4期66卷 839-854页

作者： Chong Sheng Jinyu Yang min-qian Liu National Key Laboratory for Complex Systems Simulation Beijing 100101China School of Statistics and Data Science LPMC&KLMDASRNankai UniversityTianjin 300071China

Latin hypercube designs(LHDs)are very popular in designing computer *** addition,orthogonality is a desirable property for LHDs,as it allows the estimates of the main effects in linear models to be uncorrelated with each other,and is a stepping stone to the space-filling property for fitting Gaussian process *** the available methods for constructing orthogonal Latin hypercube designs(OLHDs),the rotation method is particularly attractive due to its theoretical elegance as well as its contribution to spacefilling properties in low-dimensional *** paper proposes a new rotation method for constructing OLHDs and nearly OLHDs with flexible run sizes that cannot be obtained by existing ***,the resulting OLHDs are improved in terms of the maximin distance criterion and the alias matrices and a new kind of orthogonal designs are *** properties as well as construction algorithms are provided.

关键词： computer experiment factorial design Latin hypercube design maximin distance orthogonality

Research on emotion space of film and television scene images based on subjective perception

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The Journal of China Universities of Posts and Telecommunications 2019年第1期26卷 75-81,104页

作者： su Zhibin qian Yahong Gu Yu Ren Hui School of Information and Communication Engineering Communication University of China School of Humanities and Social Sciences Beihang University

The premise of image emotion recognition is to determine its representative emotional adjectives and establish the quantifiable emotion space. In this paper, focusing on aroused emotion from film and television(TV) scene images, a method of selecting emotional adjectives and establishing the emotion space based on subjective perception experiment is proposed. Firstly, a special data set about film and TV scene images was established and a set of initial emotional adjectives was collected. Then the subjective perception experiment was designed to let subjects to evaluate the affection of all the initial adjectives during watching these scene images. Then the method of principal basis analysis was used for variable selection. Finally, the factor analysis was applied to accomplish the second dimension reduction to form a 5-dimensional(5 D) orthogonal emotion space. The optimized emotion space can explain more than 94% of original emotional adjectives, which greatly reduces the dimension of emotional adjectives and lays a foundation for the further research on image content and emotion recognition.

关键词： film and television scene images subjective perception emotion space principal basis analysis factor analysis

Recovery of bismuth and antimony metals from pressure-leaching slag

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Rare Metals 2012年第1期31卷 102-106页

作者： Zhang, Bao Li, qian Shen, Wenqian min, Xiaobo School of Metallurgical Science and Engineering Central South University Changsha 410083 China 1st Detachment Tianjin Contingent of Chinese People's Armed Police Force Tianjin 300222 China

The leaching behavior of metals from a pressure-leaching slag was investigated using a desulphurization-leaching-hydrolysis process for the recovery of bismuth and *** parameters were studied,including the amount of acid added,temperature,time,addition of NaCl and solid-liquid ratio in the leaching *** experimental results show that the contents of bismuth and antimony are mostly enriched in the process of kerosene *** than 98% Sb and 96% Bi are extracted under the determined *** the process of hydrolysis,the precipitation rates of bismuth and antimony are 97.80% and 94.59%,*** the optimum experimental conditions,the recovery rate of bismuth and antimony can be up to 95.80% and 90.80%,respectively.

关键词： pressure-leaching slag desulphurization hydrolysis precipitation

Probabilistic Modeling and Optimization of Real-Time Protocol for Multifunction Vehicle Bus

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Tsinghua Science and Technology 2016年第5期21卷 561-569页

作者： Lifan su min Zhou Hai Wan ming Gu School of Software Tsinghua University Beijing 100084 China

In this paper, we present the modeling and optimization of a Real-Time Protocol（RTP） used in Train Communication Networks（TCN）. In the proposed RTP, message arbitration is represented by a probabilistic model and the number of arbitration checks is minimized by using the probability of device activity. Our optimized protocol is fully compatible with the original standard and can thus be implemented easily. The experimental results demonstrate that the proposed algorithm can reduce the number of checks by about 50%, thus significantly enhancing bandwidth.

关键词： train communication network probabilistic modelling protocol optimization

NUMERICAL SIMULATION OF THE HYDRODYNAMIC PERFORMANCE OF AN UNSYMMETRICAL FLAPPING CAUDAL FIN

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Journal of Hydrodynamics 2012年第3期24卷 354-362页

作者： ZHANG Xi su Yu-min WANG Zhao-li State Key Laboratory of Autonomous Underwater Vehicle Harbin Engineering University Harbin 150001 China

A comprehensive numerical simulation of the hydrodynamic performance of a caudal fin with unsymmetric flapping motion is carried out. The unsymmetrical motion is induced by adding a pitch bias or a heave bias. A numerical simulation program based on the unsteady panel method is developed to simulate the hydrodynamics of an unsymmetrical flapping caudal fin. A CFD code based on Navier-Stokes equations is used to analyze the flow field. Computational results of both the panel method and the CFD method indicate that the hydrodynamics are greatly affected by the pitch bias and the heave bias. The mean lateral force coefficient is not zero as in contrast with the symmetrical flapping motion. By increasing the pitch bias angle, the mean thrust force coefficient is reduced rapidly. By adding a heave bias, the hydrodynamic coefficients are separated as two parts： in one part, the amplitude is the heave amplitude plus the bias and in the other part, it is the heave amplitude minus the bias. Analysis of the flow field shows that the vortex distribution is not symmetrical, which generates the non-zero mean lateral force coefficient.

关键词： flapping caudal fin caudal fin shape numerical simulations hydrodynamic experiments hydrodynamic performance

The Impact of Tibetan Plateau Snow Cover on the summer Temperature in Central Asia

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Advances in Atmospheric Sciences 2022年第7期39卷 1103-1114页

作者： Xuke LIU Xiaojing JIA min WANG Qifeng qian Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province School of Earth SciencesZhejiang UniversityHangzhouZhejiang 310027China

The current work examines the impact of the snow cover extent(SCE)of the Tibetan Plateau(TP)on the interannual variation in the summer(June−July−August)surface air temperature(SAT)over Central Asia(CA)(SAT_CA)during the 1979−2019 *** leading mode of the summer SAT_CA features a same-sign temperature anomalies in CA and explains 62%of the total variance in SAT_*** atmospheric circulation associated with a warming SAT_CA is characterized by a pronounced high-pressure system dominating *** high-pressure system is accompanied by warm advection as well as descending motion over CA,favoring the warming of the SAT_*** shows that the interannual variation in the summer SAT_CA is significantly positively correlated with the April SCE over the central-eastern *** April,higher than normal SCE over the central-eastern TP has a pronounced cooling effect on the column of the atmosphere above the TP and can persist until the following early *** and positive height anomalies appear above and to the west of the *** the following months,the perturbation forcing generated by the TP SCE anomalies lies near the western center of the Asian subtropical westerly jet(SWJ),which promotes atmospheric waves in the zonal direction guided by the Asian *** with this atmospheric wave,in the following summer,a significant high-pressure system dominates CA,which is a favorable condition for a warm summer SAT_CA.

关键词： snow cover extent the Tibetan Plateau Central Asia SAT summer