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2023 1

2021 3

2020 1

2019 2

2017 2

2015 2

2013 1

2009 1

2006 1

2000 1

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关键词

一致性 1

一致性；网络一致性；拉普拉斯能量 1

中轴变换；包络；插值；蒙皮；圆 1

分析滤波器；线性预测；窄带语音水印；通带激励替代；能量规范化；谱包络成形；合成滤波器 1

包络 1

大修间隔期 1

失控；安全包线；飞机动力学；分岔分析；微分流形理论 1

寿命包线 1

寿命监控 1

小波变换 1

平均路径长度 1

无创伤估测 1

特征点 1

肺动脉压 1

论文演化图；学术文献检索；元图分解；主题连贯性 1

距离 1

降噪 1

飞机结构 1

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Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

《机械工程前沿（英文）》 2021年第16卷第1期页码 1-31 doi: 10.1007/s11465-020-0602-6

摘要： Optical interferometry is a powerful tool for measuring and characterizing areal surface topography in precision manufacturing. A variety of instruments based on optical interferometry have been developed to meet the measurement needs in various applications, but the existing techniques are simply not enough to meet the ever-increasing requirements in terms of accuracy, speed, robustness, and dynamic range, especially in on-line or on-machine conditions. This paper provides an in-depth perspective of surface topography reconstruction for optical interferometric measurements. Principles, configurations, and applications of typical optical interferometers with different capabilities and limitations are presented. Theoretical background and recent advances of fringe analysis algorithms, including coherence peak sensing and phase-shifting algorithm, are summarized. The new developments in measurement accuracy and repeatability, noise resistance, self-calibration ability, and computational efficiency are discussed. This paper also presents the new challenges that optical interferometry techniques are facing in surface topography measurement. To address these challenges, advanced techniques in image stitching, on-machine measurement, intelligent sampling, parallel computing, and deep learning are explored to improve the functional performance of optical interferometry in future manufacturing metrology.

关键词： surface topography measurement optical interferometry coherence envelope phase-shifting algorithm

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Influence of envelope insulation materials on building energy consumption

Junlan YANG, Jiabao TANG

《能源前沿（英文）》 2017年第11卷第4期页码 575-581 doi: 10.1007/s11708-017-0473-7

摘要： In this paper, the influence of different external wall insulation materials on the energy consumption of a newly built apartment in Germany is investigated. Three types of insulation materials commonly used in Germany including mineral fiber, polyurethane, and vacuum insulation panel are chosen for the case studies. An energy analysis model is established to clarify the primary energy use for production of the insulation materials and for building space heating. The calculation results show that the energy consumption for insulation material production increases with the insulation thickness, whereas the energy use for space heating decreases with the insulation thickness. Thus, there exists an optimum thickness to get the lowest total energy consumption for each kind of insulation material. The ascending order of the total energy consumption of the three materials is mineral fiber, polyurethane, and vacuum insulation panel. However, the optimum insulation thicknesses for the three insulation materials show a verse order at a certain heat transfer coefficient of the base envelope. The energy payback time (EPT) is proposed to calculate the payback time of the primary energy use for insulation material production. Mineral fiber has the shortest time, followed by polyurethane and vacuum insulation panel. The EPTS is 10, 19 and 21 years, respectively when the heat transfer coefficient of the base envelope is 0.2 W/(m ·K). In addition, the simulated results show that the theoretical value and the simulated value are basically identical.

关键词： building envelope insulation materials energy consumption payback time

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有理包络线的蒙皮应用

Kinga KRUPPA1,2

《信息与电子工程前沿（英文）》 2021年第22卷第2期页码 141-286 doi: 10.1631/FITEE.1900377

摘要：闵可夫斯基空间中的特殊曲线如闵可夫斯基毕达哥拉斯矢端线，在计算机辅助几何设计中有着重要作用，其应用近年来得到深入研究。Bizzarri等人在2016年介绍了一类有理包络（RE）曲线；提出用于G1 Hermite数据的插值方法，其合成的RE曲线能对所表示的区域生成有理边界。本文提出RE曲线的一类新的应用领域——离散输入圆集的蒙皮。若未选择正确的Hermite数据进行插值，得到的RE曲线将不适合蒙皮。本文介绍一种新颖的方法，按此方法得到的包络曲线能够接触每个圆预定的接触点。因此，我们克服了因接触点位置导致不适合蒙皮的问题。本文所提方法的一个显著优点在于其边界偏移量修剪的效率，这在计算机数控方面非常有用。

关键词：中轴变换；包络；插值；蒙皮；圆

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基于飞机结构寿命包线的飞机结构单机寿命监控

何宇廷

《中国工程科学》 2006年第8卷第6期页码 23-27

摘要：

在分析基准使用条件下飞机结构寿命包线的基础上，给出飞机结构在非基准使用条件下的寿命包线的绘制方法，阐明了在非基准使用条件下对飞机结构进行单机寿命监控的原理与方法。最后以飞机首翻后进行第二次大修的大修间隔期监控为例进行了分析说明。

关键词：飞机结构寿命包线寿命监控大修间隔期

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中心节点距离对树状网络一致性的影响

李达权,孙伟刚,胡鸿翔

《信息与电子工程前沿（英文）》 2023年第24卷第9期页码 1349-1356 doi: 10.1631/FITEE.2200400

摘要：本文研究了两个中心节点之间的距离对网络一致性的影响。网络一致性由拉普拉斯特征值所量化，可用来衡量线性系统对外部噪声的一致性程度。为获得网络一致性关于距离的精确表达式，选取一类由网络参数控制的具有两个中心节点的树状网络。利用其规则的拓扑结构，得到一致性关于网络参数和网络规模的解析表达式。证明两个中心节点距离越短，度的差异性越大，网络一致性越好。在相同网络规模和距离下，最大的中心节点度差异会导致最优的一致性。最后，建立了网络一致性与平均路径长度之间的联系，发现它们呈线性关系。

关键词：一致性距离平均路径长度

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A rate-dependent Prandtl-Ishlinskii model for piezoelectric actuators using the dynamic envelope function

Meiju YANG,Chunxia LI,Guoying GU,Limin ZHU

《机械工程前沿（英文）》 2015年第10卷第1期页码 37-42 doi: 10.1007/s11465-015-0326-1

摘要：

In this paper, a novel rate-dependent Prandtl-Ishlinskii (P-I) model is proposed to characterize the rate-dependent hysteresis nonlinearity of piezoelectric actuators. The new model is based on a modified rate-dependent play operator, in which a dynamic envelope function is introduced to replace the input function of the classical play operator. Moreover, a dynamic density function is utilized in the proposed P-I model. The parameters of the proposed model are identified by a modified particle swarm optimization algorithm. Finally, experiments are conducted on a piezo-actuated nanopositioning stage to validate the proposed P-I model under the sinusoidal inputs. The experimental results show that the developed rate-dependent P-I model precisely characterize the rate-dependent hysteresis loops up to 1000 Hz.

关键词： piezoelectric actuators hysteresis Prandtl-Ishlinskii rate-dependent

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An ANN-exhaustive-listing method for optimization of multiple building shapes and envelope properties

Yaolin LIN, Wei YANG

《能源前沿（英文）》 2021年第15卷第2期页码 550-563 doi: 10.1007/s11708-019-0607-1

摘要： With increasing awareness of sustainability, demands on optimized design of building shapes with a view to maximize its thermal performance have become stronger. Current research focuses more on building envelopes than shapes, and thermal comfort of building occupants has not been considered in maximizing thermal performance in building shape optimization. This paper attempts to develop an innovative ANN (artificial neural network)-exhaustive-listing method to optimize the building shapes and envelope physical properties in achieving maximum thermal performance as measured by both thermal load and comfort hour. After verified, the developed method is applied to four different building shapes in five different climate zones in China. It is found that the building shape needs to be treated separately to achieve sufficient accuracy of prediction of thermal performance and that the ANN is an accurate technique to develop models of discomfort hour with errors of less than 1.5%. It is also found that the optimal solutions favor the smallest window-to-external surface area with triple-layer low-E windows and insulation thickness of greater than 90 mm. The merit of the developed method is that it can rapidly reach the optimal solutions for most types of building shapes with more than two objective functions and large number of design variables.

关键词： ANN (artificial neural network) exhaustive-listing building shape optimization thermal load thermal comfort

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Multiple regression models for energy consumption of office buildings in different climates in China

Siyu ZHOU, Neng ZHU

《能源前沿（英文）》 2013年第7卷第1期页码 103-110 doi: 10.1007/s11708-012-0220-z

摘要： The energy consumption of office buildings in China has been growing significantly in recent years. Obviously, there are significant relationships between building envelope and the energy consumption of office buildings. The 8 key building envelope influencing factors were found in this paper to evaluate their effects on the energy consumption of the air-conditioning system. The typical combinations of the key influencing factors were performed in Trnsy simulation. Then on the basis of the simulated results, the multiple regression models were developed respectively for the four climates of China—hot summer and warm winter, hot summer and cold winter, cold, and severely cold. According to the analysis of regression coefficients, the appropriate building envelope design schemes were discussed in different climates. At last, the regression model evaluations consisting of the simulation evaluations and the actual case evaluations were performed to verify the feasibility and accuracy of the regression models. The error rates are within±5% in the simulation evaluations and within±15% in the actual case evaluations. It is believed that the regression models developed in this paper can be used to estimate the energy consumption of office buildings in different climates when various building envelope designs are considered.

关键词： regression model energy consumption building envelope office building different climates

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致力于血管内光学相干成像术的Ni A微电机导管

Tianshi Wang, Gijs van Soest, Antonius F. W. van der Steen

《工程（英文）》 2015年第1卷第1期页码 15-17 doi: 10.15302/J-ENG-2015018

摘要：

我们研发了一种新型的血管内光学相干成像术（IV-OCT），该技术能极其快速地实现冠状动脉成像，并通过消除心脏运动伪影和欠采样以实现图像的更高质量。它所依赖的成像探头包括一个直径为1.0 mm 且转速为5600 rev·s^–1的同步微电机，使IV-OCT 的帧频达到5.6 kHz，并使用每秒产生280 万图像扫描线的波长扫描激光器。通过使用该设备，我们团队在设置速度为100 mm·s^–1时实现了体外5600 fps 和体内4000 fps 的成像速度。由实验对象的心电图触发整个图像采集过程，当心脏在跳动过程中相对不强烈时扫描冠状动脉，因此该技术还有一个新名字，"心动光学相干成像术"（Heartbeat OCT）。

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论文演化图：学术文献多视角结构化检索 None

Dan-ping LIAO, Yun-tao QIAN

《信息与电子工程前沿（英文）》 2019年第20卷第2期页码 187-205 doi: 10.1631/FITEE.1700105

摘要：学术文献检索关注于选取最可能符合用户信息需求的论文。目前大部分检索系统局限于输出相关文献列表，而这些检出文献相互独立。本文旨在揭示检索结果的相互关系。提出一种为学术文献建立结构化检索结果的方法，称为论文演化图（PEG）。PEG采用多个演化链描述查询输入信息在不同主题方向的演化情况。通过论文作者、参考文献引用、论文内容信息这3个视角，PEG能够发现文献之间各种潜在关系，并多视角展示文献演化过程。该文献检索系统支持关键词、单篇论文、双论文3种查询方式。PEG构造主要有3个步骤：首先，采用元图分解法把文献软聚合为多个群落，获取每篇论文的主题分布；其次，从与查询相关的文献群落中提取主题连贯性演化链。每条演化链反映查询信息的某一视角；最后，提取的演化链组合形成论文演化图，可以覆盖查询涉及的所有主题。基于真实文献数据库的实验结果表明，该方法能够建立对用户有意义的论文演化图。

关键词：论文演化图；学术文献检索；元图分解；主题连贯性

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Extended stochastic resonance (SR) and its applications in weak mechanical signal processing

Niaoqing HU, Min CHEN, Guojun QIN, Lurui XIA, Zhongyin PAN, Zhanhui FENG,

《机械工程前沿（英文）》 2009年第4卷第4期页码 450-461 doi: 10.1007/s11465-009-0072-3

摘要： To catch symptoms of machine failure as early as possible, one of the most important strategies is to apply more progressive techniques during signal processing. This paper presents a method based on stochastic resonance (SR) to detect weak fault signal. First, a discrete model of a bistable system that can demonstrate SR is researched, and the stability condition for controlling the selection of model parameters of the discrete model and guarantee the solving convergence are established. Then, the frequency range of the weak signals that the SR model can detect is extended through a type of normalized scale transformation. Finally, the method is applied to extract the weak characteristic component from heavy noise to indicate the little crack fault in a bearing outer circle.

关键词： extended stochastic resonance (SR) stability analysis of SR scale transform weak signal detection incipient fault detection envelope analysis

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具有受控初始状态递归树的一致性分析及其拉普拉斯能量 Research Articles

洪美都,孙伟刚,刘苏雨,轩腾飞

《信息与电子工程前沿（英文）》 2020年第21卷第6期页码 809-962 doi: 10.1631/FITEE.1900133

摘要：本文研究一类具有受控初始状态递归树的一致性问题。由拉普拉斯谱定义的网络一致性用于刻画含有噪声线性系统的一致性动力学。基于这类递归树的规则结构，得到拉普拉斯特征值连续两次迭代的递归关系，并由此得到一阶和二阶一致性的精确解。它们由所有非零拉普拉斯特征值的倒数和与平方和来定义。一阶和二阶一致性的幂律关于网络规模N分别为ln N和N。研究表明递归树初始节点数目越少，其一致性表现越好。最后，用数值例子研究一致性和拉普拉斯能量之间的关系，结果表明一阶和二阶一致性分别随拉普拉斯能量以指数和线性速率增长。

关键词：一致性；网络一致性；拉普拉斯能量

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一种基于子带激励替换的窄带语音水印算法 Article

Wei LIU, Ai-qun HU

《信息与电子工程前沿（英文）》 2017年第18卷第5期页码 627-643 doi: 10.1631/FITEE.1601503

摘要：本文建议了一种新的窄带语音水印算法，该算法将部分语音信号替换为一个经过幅度调节和频谱成形的隐蔽信号。文中从理论上证明了若仅对一小部分载体语音作修改，则不但可以建立一个用于隐蔽通信的理想信道模型，而且还能确保隐藏信号的不可感知性和带水印信号的可懂度。在此基础上，文中建议了一个实际的系统模型。在嵌入器中，使用了能量规范化准则，使得通带水印信号的能量与原始通带语音激励信号的能量相等，然后使用合成滤波器来对该水印信号进行频谱成形。在提取器中，先用带通滤波器去除带外信号，然后用分析滤波器对失真进行补偿。实验结果显示，本文建议算法的数据速率可达400 bits/s，具有更佳的带宽效率，且有良好的不可感知性。此外，该算法对实际应用中的各种攻击也是顽健的。

关键词：分析滤波器；线性预测；窄带语音水印；通带激励替代；能量规范化；谱包络成形；合成滤波器

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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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肺动脉压无创伤估测系统及其应用价值研究

王威琪,陈树宝,汪源源,刘斌,张玉奇,余建国,孙锟,陈斯中

《中国工程科学》 2000年第2卷第1期页码 41-46

摘要：

肺动脉压是临床诊断、生理研究的一项重要指标，常规采用有创伤的心导管术测量。文章提出了一种基于超声和心电的无创伤估测方法，研制了肺动脉压无创伤估测系统。文中报告了所用的关键技术要点，动物实验和临床试用。所用的关键技术是小波变换降噪；新型百分比法提取声谱包络；小波变换识别定位超声；心电信号特征点。经9条狗的动物实验和60例临床试用，与心导管术相关性在80%以上。

关键词：肺动脉压无创伤估测小波变换降噪包络特征点