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关键词

流形学习 2

Laplacian特征映射 1

低维流形 1

冲击损伤 1

刀具状态监测；流形学习；降维；扩散映射分析；内蕴特征提取 1

制冷系统 1

地下工程 1

均匀流形逼近和投影 1

失控；安全包线；飞机动力学；分岔分析；微分流形理论 1

对象跟踪 1

岔管 1

岩石 1

建筑科学 1

强化学习 1

微分流形 1

排序问题遗传算法 1

数值流形方法 1

斜井 1

新技术 1

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A novel classification method for aid decision of traditional Chinese patent medicines for stroke treatment

null

《医学前沿（英文）》 2017年第11卷第3期页码 432-439 doi: 10.1007/s11684-017-0511-1

摘要：

Traditional Chinese patent medicines are widely used to treat stroke because it has good efficacy in the clinical environment. However, because of the lack of knowledge on traditional Chinese patent medicines, many Western physicians, who are accountable for the majority of clinical prescriptions for such medicine, are confused with the use of traditional Chinese patent medicines. Therefore, the aid-decision method is critical and necessary to help Western physicians rationally use traditional Chinese patent medicines. In this paper, Manifold Ranking is employed to develop the aid-decision model of traditional Chinese patent medicines for stroke treatment. First, 115 stroke patients from three hospitals are recruited in the cross-sectional survey. Simultaneously, traditional Chinese physicians determine the traditional Chinese patent medicines appropriate for each patient. Second, particular indicators are explored to characterize the population feature of traditional Chinese patent medicines for stroke treatment. Moreover, these particular indicators can be easily obtained by Western physicians and are feasible for widespread clinical application in the future. Third, the aid-decision model of traditional Chinese patent medicines for stroke treatment is constructed based on Manifold Ranking. Experimental results reveal that traditional Chinese patent medicines can be differentiated. Moreover, the proposed model can obtain high accuracy of aid decision.

关键词： traditional Chinese patent medicines stroke aid decision data mining manifold ranking

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Identification and ranking of the risky organic contaminants in the source water of the Danjiangkou reservoir

Qingwei BU, Donghong WANG, Zijian WANG, Junnong GU

《环境科学与工程前沿（英文）》 2014年第8卷第1期页码 42-53 doi: 10.1007/s11783-013-0499-y

摘要： The Danjiangkou reservoir was selected to provide the source water for the middle routes of the South to North Water Transfer Project, which has provoked many environmental concerns. To date, investigations of water contamination of the source water of the Danjiangkou reservoir with organic micro-pollutants have been limited. This study was conducted to identify and rank organic contaminants that pose risks in the Danjiangkou reservoir. To this end, the Chemical Hazard Evaluation and Management Strategies (CHEMS-1) approach was adapted to integrate the deconvolution technology of qualitative identifying contaminants for site-specific environmental matrices. The samples were screened for the presence of 1093 contaminants using deconvolution technologies and the hazard values of the identified contaminants were calculated using the adapted CHEMS-1 approach according to their hazardous properties and occurrence in source water. The results showed that 46 contaminants from 1093 targets were present in Danjiangkou water, 23 of which appeared at frequencies higher than 50%, and 15 of which were identified as priorities. Over half (53%) of the high-ranked contaminants were polycyclic aromatic hydrocarbons (PAHs), with chrysene ranked highest on the list. Health risk assessment of the top-ranked PAHs was conducted and revealed that cancer risks of PAHs detected in the source water of Danjiangkou to different populations ranged from 10 to 10 , indicating a low cancer risk to consumers. The results of this study indicated that the adapted CHEMS-1 approach was feasible for site-specific screening of organic contaminants to identify and rank potential priority pollutants.

关键词： identification and ranking source water deconvolution risk assessment Danjiangkou South to North Water Transfer Project

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Review on ranking and selection: A new perspective

L. Jeff HONG, Weiwei FAN, Jun LUO

《工程管理前沿（英文）》 2021年第8卷第3期页码 321-343 doi: 10.1007/s42524-021-0152-6

摘要： In this paper, we briefly review the development of ranking and selection (R&S) in the past 70 years, especially the theoretical achievements and practical applications in the past 20 years. Different from the frequentist and Bayesian classifications adopted by Kim and Nelson (2006b) and Chick (2006) in their review articles, we categorize existing R&S procedures into fixed-precision and fixed-budget procedures, as in Hunter and Nelson (2017). We show that these two categories of procedures essentially differ in the underlying methodological formulations, i.e., they are built on hypothesis testing and dynamic programming, respectively. In light of this variation, we review in detail some well-known procedures in the literature and show how they fit into these two formulations. In addition, we discuss the use of R&S procedures in solving various practical problems and propose what we think are the important research questions in the field.

关键词： ranking and selection hypothesis testing dynamic programming simulation

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Simulation of viscoelastic behavior of defected rock by using numerical manifold method

Feng REN, Lifeng FAN, Guowei MA

《结构与土木工程前沿（英文）》 2011年第5卷第2期页码 199-207 doi: 10.1007/s11709-011-0102-1

摘要： Numerical simulations of longitudinal wave propagation in a rock bar with microcracks are conducted by using the numerical manifold method which has great advantages in the simulation of discontinuities. Firstly, validation of the numerical manifold method is carried out by simulations of a longitudinal stress wave propagating through intact and cracked rock bars. The behavior of the stress wave traveling in a one-dimensional rock bar with randomly distributed microcracks is subsequently studied. It is revealed that the highly defected rock bar has significant viscoelasticity to the stress wave propagation. Wave attenuation as well as time delay is affected by the length, quantity, specific stiffness of the distributed microcracks as well as the incident stress wave frequency. The storage and loss moduli of the defected rock are also affected by the microcrack properties; however, they are independent of incident stress wave frequency.

关键词： stress wave propagation defected rock numerical manifold method viscoelastic behavior storage modulus loss modulus

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Rotation errors in numerical manifold method and a correction based on large deformation theory

Ning ZHANG, Xu LI, Qinghui JIANG, Xingchao LIN

《结构与土木工程前沿（英文）》 2019年第13卷第5期页码 1036-1053 doi: 10.1007/s11709-019-0535-5

摘要： Numerical manifold method (NMM) is an effective method for simulating block system, however, significant errors are found in its simulation of rotation problems. Three kinds of errors, as volume expansion, stress vibration, and attenuation of angular velocity, were observed in the original NMM. The first two kind errors are owing to the small deformation assumption and the last one is due to the numerical damping. A large deformation NMM is proposed based on large deformation theory. In this method, the governing equation is derived using Green strain, the large deformation iteration and the open-close iteration are combined, and an updating strategy is proposed. The proposed method is used to analyze block rotation, beam bending, and rock falling problems and the results prove that all three kinds of errors are eliminated in this method.

关键词： numerical manifold method rotation large deformation Green strain open-close iteration

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Phenomena identification and ranking table exercise for thorium based molten salt reactor-solid fuel

Xiaojing LIU, Qi WANG, Zhaozhong HE, Kun CHEN, Xu CHENG

《能源前沿（英文）》 2019年第13卷第4期页码 707-714 doi: 10.1007/s11708-019-0616-0

摘要： Thorium based molten salt reactor-solid fuel (TMSR-SF) design is an innovative reactor concept that uses high-temperature tristructural-isotropic (TRISO) fuel with a low-pressure liquid salt coolant. In anticipation of getting licensed applications for TMSR-SF in the future, it is necessary to fully understand the significant features and phenomena of TMSR-SF design, as well as its transient behavior during accidents. In this paper, the safety-relevant phenomena, importance, and knowledge base were assessed for the selected events and the transient of TMSR-SF during station blackout scenario is simulated based on RELAP/SCDAPSIM Mod 4.0. The phenomena having significant impact but with limited knowledge of their history are core coolant bypass flows, outlet plenum flow distribution, and intermediate heat exchanger (IHX) over/under cooling transients. Some thermal hydraulic parameters during the station blackout scenario are also discussed.

关键词： phenomena identification and ranking table (PIRT) thorium based molten salt reactor-solid fuel (TMSR-SF) safety analysis RELAP/SCDAPSIM

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Elements’ important ranking of China drug safety management system: applying the non-structural

Xiaoping ZHENG, Xiaocui WANG, Tingkuan ZHONG,

《化学科学与工程前沿（英文）》 2010年第4卷第3期页码 290-299 doi: 10.1007/s11705-009-0283-5

摘要： Drug safety management is an important issue in China drug management system and attracts great attentions from the whole society. In order to reduce drug incident, this study discusses some important elements associated with China drug safety management system and analyzes the data collected by questionnaires. Besides, a methodology for rating the important elements is described and applied. The non-structural fuzzy group decision method not only considers the insufficient precise information but also combines the opinions of different kinds of respondents in China’s four municipalities. The results indicate that the sample systems are the most important in these important elements, and the order of importance is sampling systems, licensing systems, traceability systems, transaction models, pharmacovigilance and emergence management. This study not only points out the important ranking of the pivotal elements in China drug safety management but also gives some specific proposals about how to enhance drug safety management in China.

关键词： management system different management important ranking non-structural fuzzy

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激活–效价维度空间中基于脸部图像的情感等级排序方法 None

Guo-peng XU, Hai-tang LU, Fei-fei ZHANG, Qi-rong MAO

《信息与电子工程前沿（英文）》 2018年第19卷第6期页码 783-795 doi: 10.1631/FITEE.1700270

摘要：在维度情感识别领域，分类和回归通常被用来对情感的机器学习进行建模和预测。然而，在维度情感空间中，情感标注通常是一个连续的实数值，拥有有序属性。而前面所提的两种方法并没有考虑并利用这一重要信息。因此，我们提出一个在激活和效价维度空间下的基于脸部图像的情感等级排序框架。我们的方法能够通过离散化连续的情感标注得到情感等级，并恰当地利用它们之间的有序信息。确切地说，首先训练一系列基本误差敏感二分类器，每个二分类器都使用经过二值重新标注的全部样本。依据样本对应的情感等级与给定二分类器对应的情感等级的比较结果，对二值进行重新标注。然后通过聚合所有二分类器的输出结果，可以得到样本最终的情感等级预测结果。在AVEC 2015挑战赛标准数据集和SEMAINE子集数据集上对所提方法与基本的和基于深度学习的分类和回归方法进行比较。实验结果表明，所提出的基于排序的情感识别方法在激活和效价两个维度上都是有效的。

关键词：有序排序；维度情感识别；效价度；激活度；脸部图像处理

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基于Laplacian特征映射的被动毫米波目标识别

罗磊,李跃华,栾英宏

《中国工程科学》 2010年第12卷第3期页码 77-81

摘要：

针对传统被动毫米波金属目标识别方法中特征提取、选择的缺点，采用Laplacian特征映射流形学习算法发现了金属目标回波信号短

关键词：流形学习 Laplacian特征映射非线性降维低维流形毫米波

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基于流形学习的离群点检测方法

徐雪松,宋东明,张谞,许满武,刘凤玉

《中国工程科学》 2009年第11卷第2期页码 82-87

摘要：

为了提高高维数据集合离群数据挖掘效率，提出了一种基于流形学习的离群点检测算法。局部线性嵌入（ locally linear embedding， LLE）算法是流形学习中有效的非线性降维方法，它的优势在于只定义唯一的参数，即邻域数。根据LLE算法的思想寻找样本数据的内在嵌入分布，并通过邻域数选取和降维后数据点之间的距离调整，提高了数据集中离群点发现效率，同时利用离群点权值判别式进行权值数据判定，根据权值的大小标识出数据集中的离群点，仿真实验的结果表明了该方法能够有效地发现高维数据集中的离群点。与此同时，该算法具有参数估计简单、参数影响不大等优点，该算法为离群点检测问题的机器学习提供了一条新的途径。

关键词：流形学习离群点检测高维数据维数约减离群数据

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Iterative HOEO fusion strategy: a promising tool for enhancing bearing fault feature

《机械工程前沿（英文）》 2023年第18卷第1期 doi: 10.1007/s11465-022-0725-z

摘要： As parameter independent yet simple techniques, the energy operator (EO) and its variants have received considerable attention in the field of bearing fault feature detection. However, the performances of these improved EO techniques are subjected to the limited number of EOs, and they cannot reflect the non-linearity of the machinery dynamic systems and affect the noise reduction. As a result, the fault-related transients strengthened by these improved EO techniques are still subject to contamination of strong noises. To address these issues, this paper presents a novel EO fusion strategy for enhancing the bearing fault feature nonlinearly and effectively. Specifically, the proposed strategy is conducted through the following three steps. First, a multi-dimensional information matrix (MDIM) is constructed by performing the higher order energy operator (HOEO) on the analysis signal iteratively. MDIM is regarded as the fusion source of the proposed strategy with the properties of improving the signal-to-interference ratio and suppressing the noise in the low-frequency region. Second, an enhanced manifold learning algorithm is performed on the normalized MDIM to extract the intrinsic manifolds correlated with the fault-related impulses. Third, the intrinsic manifolds are weighted to recover the fault-related transients. Simulation studies and experimental verifications confirm that the proposed strategy is more effective for enhancing the bearing fault feature than the existing methods, including HOEOs, the weighting HOEO fusion, the fast Kurtogram, and the empirical mode decomposition.

关键词： higher order energy operator fault diagnosis manifold learning rolling element bearing information fusion

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利用流形学习进行基于图像的三维模型检索 None

Pan-pan MU, San-yuan ZHANG, Yin ZHANG, Xiu-zi YE, Xiang PAN

《信息与电子工程前沿（英文）》 2018年第19卷第11期页码 1397-1408 doi: 10.1631/FITEE.1601764

摘要：提出一种基于图像的三维模型检索新框架。把查询的图像建模为欧氏空间的一个点，把三维模型所有投影视图建模为一个对称正定矩阵，并视该对称正定矩阵为黎曼流形上的一个点。于是，基于图像的三维模型检索简化为欧氏空间到黎曼流形上的度量学习。为解决异质匹配问题，把欧式空间和对称正定矩阵黎曼空间映射到同一个高维希尔伯特空间，极大缩小彼此之间语义鸿沟。最后，使用核方法设计一个优化算法学习映射。任何新图像描述符，比如深度学习特征描述符，可以很容易嵌入该框架。实验结果表明，该方法相较目前最新基于图像的三维模型检索方法有一定优势。

关键词：模型检索；欧式空间；黎曼流形；希尔伯特空间；度量学习

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Ranking of design scenarios of TMD for seismically excited structures using TOPSIS

Sadegh ETEDALI

《结构与土木工程前沿（英文）》 2020年第14卷第6期页码 1372-1386 doi: 10.1007/s11709-020-0671-y

摘要： In this paper, design scenarios of a tuned mass damper (TMD) for seismically excited structures are ranked. Accordingly, 10 design scenarios in two cases, namely unconstrained and constrained for the maximum TMD, are considered in this study. A free search of the TMD parameters is performed using a particle swarm optimization (PSO) algorithm for optimum tuning of TMD parameters. Furthermore, nine criteria are adopted with respect to functional, operational, and economic views. A technique for order performance by similarity to ideal solution (TOPSIS) is utilized for ranking the adopted design scenarios of TMD. Numerical studies are conducted on a 10-story building equipped with TMD. Simulation results indicate that the minimization of the maximum story displacement is the optimum design scenario of TMD for the seismic-excited structure in the unconstrained case for the maximum TMD stroke. Furthermore, H of the displacement vector of the structure exhibited optimum ranking among the adopted design scenarios in the constrained case for the maximum TMD stroke. The findings of this study can be useful and important in the optimum design of TMD parameters with respect to functional, operational, and economic perspectives.

关键词： seismic-excited building TMD optimum design PSO design scenario TOPSIS

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基于微分流形理论和分岔理论的飞机安全性分析 None

Chi ZHOU, Ying-hui LI, Wu-ji ZHENG, Peng-wei WU

《信息与电子工程前沿（英文）》 2019年第20卷第2期页码 292-299 doi: 10.1631/FITEE.1700435

摘要：失控（LOC）被认为是导致世界范围内致命飞机事故的主要原因之一。减少飞机失控对于提高飞行安全意义重大。虽然目前航空界对失控的定义还比较模糊，但研究表明失控通常与飞行状态超出安全包线、飞机动力学的非线性影响以及飞行机组人员不当操纵有关。本文主要针对飞机动力学的非线性影响和驾驶员不当操纵导致的失控展开研究，利用分岔分析方法确定飞行状态的失速点和分岔点。研究结果表明，驾驶员操纵过度将直接导致飞机失速。此外，飞行状态接近飞行包线边界时，驾驶员的操纵会变得特别敏感，稍微改变操纵指令就可能导致飞行状态超出安全包线。即使在某个操纵指令下存在稳定平衡状态，飞行状态仍可能处于安全包线之外。为提升飞行安全，引入微分流形理论确定安全包线。以NASA的通用模型作为案例展开研究。

关键词：失控；安全包线；飞机动力学；分岔分析；微分流形理论

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地下工程新技术的实践

马洪琪

《中国工程科学》 2002年第4卷第11期页码 37-41

摘要：

广蓄电站高压岔管的P. D值达5.8×10^４kN·m，未采用常规的钢岔管，在钢筋混凝土岔管设计原则上，主要依靠围岩承担水压力。施工中从控制爆破、混凝土质量、高压灌浆等方面实现设计意图。这种结构安全可靠，投资省，效益好。广蓄斜井引进了一套间断式的斜井滑模，经改进和完善，获得了成功。在天荒坪抽水蓄能电站长斜井施工中，研制了自主知识产权的XHM-7型斜井滑模设备，实现了斜井混凝土衬砌的连续滑升，显示了该设备结构新颖、安全可靠、速度快、造价低的优势。以上两项新技术的成功实践，为我国类似工程的推广和应用提供了有益的经验。

关键词：水电地下工程岔管斜井新技术