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Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 1-31 doi: 10.1007/s11465-020-0602-6

Abstract: Theoretical background and recent advances of fringe analysis algorithms, including coherence peak sensing

Keywords： 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

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 575-581 doi: 10.1007/s11708-017-0473-7

Abstract: the three insulation materials show a verse order at a certain heat transfer coefficient of the base envelopeThe EPTS is 10, 19 and 21 years, respectively when the heat transfer coefficient of the base envelope

Keywords： building envelope     insulation materials     energy consumption     payback time    

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Applying Rational Envelope curves for skinning purposes

Kinga Kruppa,kruppa.kinga@inf.unideb.hu

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900377

Abstract: Special curves in the Minkowski space such as Minkowski Pythagorean hodograph curves play an important role in computer-aided geometric design, and their usages are thoroughly studied in recent years. Bizzarri et al. (2016) introduced the class of Rational (RE) curves, and an method for Hermite data was presented, where the resulting RE curve yielded a rational boundary for the represented domain. We now propose a new application area for RE curves: of a discrete set of input s. We show that if we do not choose the Hermite data correctly for , then the resulting RE curves are not suitable for . We introduce a novel approach so that the obtained curves touch each at previously defined points of contact. Thus, we overcome those problematic scenarios in which the location of touching points would not be appropriate for purposes. A significant advantage of our proposed method lies in the efficiency of trimming offsets of boundaries, which is highly beneficial in computer numerical control machining.

Keywords： Medial axis transform     Envelope     Interpolation     Skinning     Circle    

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Service Life Supervision for Individual Aircraft Structural System Based on Aircraft Structural Life Envelope

He Yuting

Strategic Study of CAE 2006, Volume 8, Issue 6,   Pages 23-27

Abstract:

Based on the analysis of the aircraft structural life envelope (ASLE) under the baseline operationalconditions, an approach of establishment of aircraft structural life envelope (ASLE) under nonbaseline

Keywords： aircraft structure     life envelope     service life supervision     time between overhauls    

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Impact of distance between two hubs on the network coherence of tree networks

李达权,孙伟刚,胡鸿翔

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9,   Pages 1349-1356 doi: 10.1631/FITEE.2200400

Abstract: We study the impact of the distance between two hubs on network coherence defined by Laplacian eigenvaluesNetwork coherence is a measure of the extent of consensus in a linear system with additive noise.To obtain an exact determination of coherence based on the distance, we choose a family of tree networksWith the same network size and distance, the best coherence occurs in the tree with the largest differenceFinally, we establish a correlation between network coherence and average path length and find that they

Keywords： Consensus     Coherence     Distance     Average path length    

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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

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 37-42 doi: 10.1007/s11465-015-0326-1

Abstract: The new model is based on a modified rate-dependent play operator, in which a dynamic envelope function

Keywords： 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

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 550-563 doi: 10.1007/s11708-019-0607-1

Abstract: innovative ANN (artificial neural network)-exhaustive-listing method to optimize the building shapes and envelope

Keywords： 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

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 103-110 doi: 10.1007/s11708-012-0220-z

Abstract: Obviously, there are significant relationships between building envelope and the energy consumption ofThe 8 key building envelope influencing factors were found in this paper to evaluate their effects onAccording to the analysis of regression coefficients, the appropriate building envelope design schemesto estimate the energy consumption of office buildings in different climates when various building envelope

Keywords： regression model     energy consumption     building envelope     office building     different climates    

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A Micromotor Catheter for Intravascular Optical Coherence Tomography

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

Engineering 2015, Volume 1, Issue 1,   Pages 15-17 doi: 10.15302/J-ENG-2015018

Abstract:

We have developed a new form of intravascular optical coherence tomography (IV-OCT) that allows the

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Paper evolution graph: multi-view structural retrieval for academic literature None

Dan-ping LIAO, Yun-tao QIAN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2,   Pages 187-205 doi: 10.1631/FITEE.1700105

Abstract:

Academic literature retrieval concerns about the selection of papers that are most likely to match a user’s information needs. Most of the retrieval systems are limited to list-output models, in which the retrieval results are isolated from each other. In this paper, we aim to uncover the relationships between the retrieval results and propose a method to build structural retrieval results for academic literature, which we call a paper evolution graph (PEG). The PEG describes the evolution of diverse aspects of input queries through several evolution chains of papers. By using the author, citation, and content information, PEGs can uncover various underlying relationships among the papers and present the evolution of articles from multiple viewpoints. Our system supports three types of input queries: keyword query, single-paper query, and two-paper query. The construction of a PEG consists mainly of three steps. First, the papers are soft-clustered into communities via metagraph factorization, during which the topic distribution of each paper is obtained. Second, topically cohesive evolution chains are extracted from the communities that are relevant to the query. Each chain focuses on one aspect of the query. Finally, the extracted chains are combined to generate a PEG, which fully covers all the topics of the query. Experimental results on a real-world dataset demonstrate that the proposed method can construct meaningful PEGs.

Keywords： Paper evolution graph     Academic literature retrieval     Metagraph factorization     Topic coherence    

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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,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 450-461 doi: 10.1007/s11465-009-0072-3

Abstract: 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.

Keywords： resonance (SR)     stability analysis of SR     scale transform     weak signal detection     incipient fault detection     envelope    

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Coherence analysis and Laplacian energy of recursive trees with controlled initial states Research Articles

Mei-du Hong, Wei-gang Sun, Su-yu Liu, Teng-fei Xuan,wgsun@hdu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 6,   Pages 809-962 doi: 10.1631/FITEE.1900133

Abstract: We study the of a family of recursive trees with novel features that include the initial states controlled by a parameter. The problem in a linear system with additive noises is characterized as , which is defined by a Laplacian spectrum. Based on the structures of our recursive treelike model, we obtain the recursive relationships for Laplacian eigenvalues in two successive steps and further derive the exact solutions of first- and second-order coherences, which are calculated by the sum and square sum of the reciprocal of all nonzero Laplacian eigenvalues. For a large network size , the scalings of the first- and second-order coherences are ln and $, respectively. The smaller the number of initial nodes, the better the bears. Finally, we numerically investigate the relationship between and , showing that the first- and second-order coherences increase with the increase of at approximately exponential and linear rates, respectively.

Keywords： 一致性；网络一致性；拉普拉斯能量    

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A subband excitation substitute based scheme for narrowband speech watermarking Article

Wei LIU, Ai-qun HU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 627-643 doi: 10.1631/FITEE.1601503

Abstract: We propose a new narrowband speech watermarking scheme by replacing part of the speech with a scaled and spectrally shaped hidden signal. Theoretically, it is proved that if a small amount of host speech is modified, then not only an ideal channel model for hidden communication can be established, but also high imperceptibility and good intelligibility can be achieved. Furthermore, a practical system implementation is proposed. At the embedder, the power normalization criterion is first imposed on a passband watermark signal by forcing its power level to be the same as the original passband excitation of the cover speech, and a synthesis filter is then used to spectrally shape the scaled watermark signal. At the extractor, a bandpass filter is first used to get rid of the out-of-band signal, and an analysis filter is then employed to compensate for the distortion introduced by the synthesis filter. Experimental results show that the data rate is as high as 400 bits/s with better bandwidth efficiency, and good imperceptibility is achieved. Moreover, this method is robust against various attacks existing in real applications.

Keywords： prediction     Narrowband speech watermarking     Passband excitation replacement     Power normalization     Spectral envelope    

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Aircraft safety analysis based on differential manifold theory and bifurcation method None

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

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2,   Pages 292-299 doi: 10.1631/FITEE.1700435

Abstract: is still vaguely defined, LOC is generally associated with a flight state that is outside the safety envelopeequilibrium state in one of the elevator deflections, the flight state may still be outside the flight safety envelopeWhen the flight state is near the edge of the flight safety envelope, the strategy to regulate the elevatorand a slight change in the elevator deflection may contribute to a flight state outside the safety envelopeTo solve this issue, the differential manifold theory is introduced to determine the safety envelope.

Keywords： Loss of control     Safety envelope     Aircraft dynamic     Bifurcation analysis     Differential manifold theory    

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A Non-invasive Evaluation System for Pulmonary Artery Pressure and its Application Value

Wang Weiqi,Chen Shubao,Wang Yuanyuan,Liu Bin,Zhang Yuqi,Yu Jianguo,Sun Kun,Chen Sizhong

Strategic Study of CAE 2000, Volume 2, Issue 1,   Pages 41-46

Abstract:

Pulmonary artery pressure is an important parameter for clinical diagnosis and physiological research. It used to be measured by the traditional invasive method, cardiac catheterization. A non-invasive method based on audio pulsed-wave Doppler signal and ECG is presented and the noninvasive evaluation system is developed. The key techniques, animal experiment and clinical probation are described in this paper. The key techniques include： wavelet de-noising, new percentile method as well as locating characteristic point with wavelet. According to the data obtained from animal experiments of 9 dogs and 60 cases, the relativity with cardiac catheterization exceeds 80% .

Keywords： pulmonary artery pressure     non-invasive evaluation     wavelet     de-noising     envelope curve     characteristic point    

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Title Author Date Type Operation

Development of surface reconstruction algorithms for optical interferometric measurement

Dongxu WU, Fengzhou FANG

Journal Article

Influence of envelope insulation materials on building energy consumption

Junlan YANG, Jiabao TANG

Journal Article

Applying Rational Envelope curves for skinning purposes

Kinga Kruppa,kruppa.kinga@inf.unideb.hu

Journal Article

Service Life Supervision for Individual Aircraft Structural System Based on Aircraft Structural Life Envelope

He Yuting

Journal Article

Impact of distance between two hubs on the network coherence of tree networks

李达权,孙伟刚,胡鸿翔

Journal Article

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

Meiju YANG,Chunxia LI,Guoying GU,Limin ZHU

Journal Article

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

Yaolin LIN, Wei YANG

Journal Article

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

Siyu ZHOU, Neng ZHU

Journal Article

A Micromotor Catheter for Intravascular Optical Coherence Tomography

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

Journal Article

Paper evolution graph: multi-view structural retrieval for academic literature

Dan-ping LIAO, Yun-tao QIAN

Journal Article

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

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

Journal Article

Coherence analysis and Laplacian energy of recursive trees with controlled initial states

Mei-du Hong, Wei-gang Sun, Su-yu Liu, Teng-fei Xuan,wgsun@hdu.edu.cn

Journal Article

A subband excitation substitute based scheme for narrowband speech watermarking

Wei LIU, Ai-qun HU

Journal Article

Aircraft safety analysis based on differential manifold theory and bifurcation method

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

Journal Article

A Non-invasive Evaluation System for Pulmonary Artery Pressure and its Application Value

Wang Weiqi,Chen Shubao,Wang Yuanyuan,Liu Bin,Zhang Yuqi,Yu Jianguo,Sun Kun,Chen Sizhong

Journal Article