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Effect of wing morphing on stability and energy harvesting in albatross dynamic soaring
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作者 Wei WANG Weigang AN Bifeng SONG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2024年第11期317-334,共18页
Dynamic soaring,which harvests energy from the wind,can enhance Unmanned Aerial Vehicles'(UAVs')range and endurance.However,energy harvesting efficiency issues hinder UAV applications,which can be addressed by... Dynamic soaring,which harvests energy from the wind,can enhance Unmanned Aerial Vehicles'(UAVs')range and endurance.However,energy harvesting efficiency issues hinder UAV applications,which can be addressed by wing morphing.Therefore,this study investigates the influence of albatross wing morphing during dynamic soaring.By constructing a parametric model,the shape of the albatross wing can be modeled and achieve morphing based on joints.From the video data,this paper summarizes the typical wing morphing patterns of the albatross and notices that changes primarily occur during the leeward descent phase.This paper first analyzes the aerodynamic performance of different wing morphing patterns and finds that the drag coefficient can be reduced by 7.75%with a suitable morphing pattern.This paper also explores the drag coefficient reduction mechanism and finds that downwash airflow decreases by 30.32%after wingtip anhedral.Interestingly,the lift-to-drag ratio shows minimal variation under different morphing patterns,within 2%.From the stability perspective,this study finds that the neutral point position changes after morphing.The maximum longitudinal static margin change is 4.9%,enhancing longitudinal stability by increasing the restorative moment arm.The lateral neutral point is 4.87%closer to the center of gravity,decreasing the roll and yaw moments.It can be observed that wingtip anhedral significantly increases the stability of the albatross.Moreover,a flight simulation is carried out to study the morphing influence on trajectory and energy harvesting.The results show that maximum energy gained is improved by 47.99%,and endurance is increased by 13.05%.The results also indicate that the effects of wing morphing are global rather than limited to the phase of morphing occurrence.Finally,based on the results,this paper proposes wing morphing regularity about the wingtip for UAVs.Wingtip bends downward can significantly increase the UAVs'stability and reduce drag,but the overall trajectory needs to be reconsidered after introducing wing morphing. 展开更多
关键词 Dynamic soaring Wing morphing Aerodynamics STABILITY Energy harvesting
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Calculation and prediction of divertor detachment via impurity seeding by using one-dimensional model
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作者 周文杰 刘晓菊 +5 位作者 邬潇河 李邦 石奇奇 樊皓尘 杨艳杰 李国强 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第8期370-379,共10页
Achieving the detachment of divertor can help to alleviate excessive heat load and sputtering problems on the target plates,thereby extending the lifetime of divertor components for fusion devices.In order to provide ... Achieving the detachment of divertor can help to alleviate excessive heat load and sputtering problems on the target plates,thereby extending the lifetime of divertor components for fusion devices.In order to provide a fast but relatively reliable prediction of plasma parameters along the flux tube for future device design,a one-dimensional(1D)modeling code for the operating point of impurity seeded detached divertor is developed based on Python language,which is a fluid model based on previous work(Plasma Phys.Control.Fusion 58045013(2016)).The experimental observation of the onset of divertor detachment by neon(Ne)and argon(Ar)seeding in EAST is well reproduced by using the 1D modeling code.The comparison between the 1D modeling and two-dimensional(2D)simulation by the SOLPS-ITER code for CFETR detachment operation with Ne and Ar seeding also shows that they are in good agreement.We also predict the radiative power loss and corresponding impurity concentration requirement for achieving divertor detachment via different impurity seeding under high heating power conditions in EAST and CFETR phase II by using the 1D model.Based on the predictions,the optimized parameter space for divertor detachment operation on EAST and CFETR is also determined.Such a simple but reliable 1D model can provide a reasonable parameter input for a detailed and accurate analysis by 2D or three-dimensional(3D)modeling tools through rapid parameter scanning. 展开更多
关键词 divertor detachment impurity seeding one-dimensional modeling
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A luminescent one-dimensional covalent organic framework for organic arsenic sensing in water
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作者 Chao Liu Chao Jia +3 位作者 Shi-Xian Gan Qiao-Yan Qi Guo-Fang Jiang Xin Zhao 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第11期304-308,共5页
Roxarsone(ROX)is a commonly used antibacterial and growth-promoting additive to animal feed.The development of an effective method for detecting ROX and its conversion products is of importance because of their potent... Roxarsone(ROX)is a commonly used antibacterial and growth-promoting additive to animal feed.The development of an effective method for detecting ROX and its conversion products is of importance because of their potential harm to human health and ecosystem.Herein,we report the designed synthesis of a novel one-dimensional covalent organic framework(1D COF),named EP-COF,and its application as a fluorescent probe for ROX sensing.EP-COF is constructed based on imine linkages,exhibiting high crystallinity,strong fluorescence emission,and good dispersibility in water.It displays a remarkable capability to efficiently detect ROX,with an impressive detection limit of 4.5 nmol/L.Moreover,EP-COF also offers advantages of excellent selectivity,and high structural stability.This work not only presents a promising approach for the detection of harmful substances like ROX,but also serves as a valuable reference for exploring application of 1D COFs in chemical sensing. 展开更多
关键词 one-dimensional Covalent organic framework Fluorescent probe ROXARSONE SENSING
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Numerical Investigations on the Resonance Errors of Multiscale Discontinuous Galerkin Methods for One-Dimensional Stationary Schrödinger Equation
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作者 Bo Dong Wei Wang 《Communications on Applied Mathematics and Computation》 EI 2024年第1期311-324,共14页
In this paper,numerical experiments are carried out to investigate the impact of penalty parameters in the numerical traces on the resonance errors of high-order multiscale discontinuous Galerkin(DG)methods(Dong et al... In this paper,numerical experiments are carried out to investigate the impact of penalty parameters in the numerical traces on the resonance errors of high-order multiscale discontinuous Galerkin(DG)methods(Dong et al.in J Sci Comput 66:321–345,2016;Dong and Wang in J Comput Appl Math 380:1–11,2020)for a one-dimensional stationary Schrödinger equation.Previous work showed that penalty parameters were required to be positive in error analysis,but the methods with zero penalty parameters worked fine in numerical simulations on coarse meshes.In this work,by performing extensive numerical experiments,we discover that zero penalty parameters lead to resonance errors in the multiscale DG methods,and taking positive penalty parameters can effectively reduce resonance errors and make the matrix in the global linear system have better condition numbers. 展开更多
关键词 Discontinuous Galerkin(DG)method Multiscale method Resonance errors one-dimensional Schrödinger equation
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Morphing the Rules:Advanced Adaptations of Mud in Nigerian Buildings
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作者 Stephen Babatunde Ajadi 《Journal of Civil Engineering and Architecture》 2024年第8期373-383,共11页
Mud is a ubiquitous building material in Nigeria,perhaps this is the reason why it is hardly seen as the outright building material that it is.The most popular contribution of mud to Nigerian architecture can only be ... Mud is a ubiquitous building material in Nigeria,perhaps this is the reason why it is hardly seen as the outright building material that it is.The most popular contribution of mud to Nigerian architecture can only be seen in the ancient traditional huts all over the country.Although still a building material in the suburbs of the country,mud is seen as a relic of the past,a symbol of a primitive tale of Nigerian building construction.The primary effort here is to redefine mud as a“skin”with infinite possibilities of imagery and texture,rather than its typical application as a wall in Nigerian architecture.Mud is attempted to be expressed via a new geometric vocabulary by re-evaluating its surreptitious properties including its ability to behave like a formally defined NURBS(non-uniform rational basis spline)surface.The properties of mud and clay are unconventionally simulated in computer modelling and analysis software to understand the ways in which it can be optimized for advanced building applications.Streamlined calculations and algorithmic calculations serve as tools to discover the NURBS-propensity of mud.This provides a whole new low-cost construction opportunity for the building of irregularly flowing structures. 展开更多
关键词 Comganisms generate morph MUD skin SPLINE texture.
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Prediction of one-dimensional CrN nanostructure as a promising ferromagnetic half-metal
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作者 相文雨 王亚萍 +3 位作者 纪维霄 侯文杰 李胜世 王培吉 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期429-435,共7页
Searching for one-dimensional(1D)nanostructure with ferromagnetic(FM)half-metallicity is of significance for the development of miniature spintronic devices.Here,based on the first-principles calculations,we propose t... Searching for one-dimensional(1D)nanostructure with ferromagnetic(FM)half-metallicity is of significance for the development of miniature spintronic devices.Here,based on the first-principles calculations,we propose that the 1D CrN nanostructure is a FM half-metal,which can generate the fully spin-polarized current.The ab initio molecular dynamic simulation and the phonon spectrum calculation demonstrate that the 1D CrN nanostructure is thermodynamically stable.The partially occupied Cr-d orbitals endow the nanostructure with FM half-metallicity,in which the half-metallic gap(?s)reaches up to 1.58 eV.The ferromagnetism in the nanostructure is attributed to the superexchange interaction between the magnetic Cr atoms,and a sizable magnetocrystalline anisotropy energy(MAE)is obtained.Moreover,the transverse stretching of nanostructure can effectively modulate?s and MAE,accompanied by the preservation of half-metallicity.A nanocable is designed by encapsulating the CrN nanostructure with a BN nanotube,and the intriguing magnetic and electronic properties of the nanostructure are retained.These novel characteristics render the 1D CrN nanostructure as a compelling candidate for exploiting high-performance spintronic devices. 展开更多
关键词 HALF-METAL FERROMAGNETISM one-dimensional nanostructure first-principles calculations
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Quantitative analysis of the morphing wing mechanism of raptors:Morphing kinematics of Falco peregrinus wing
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作者 唐迪 车婧琦 +4 位作者 金伟杰 崔亚辉 范忠勇 杨茵 刘大伟 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第4期68-77,共10页
Raptors are getting more attention from researchers because of their excellent flight abilities.And the excellent wing morphing ability is critical for raptors to achieve high maneuvering flight,which can be a good bi... Raptors are getting more attention from researchers because of their excellent flight abilities.And the excellent wing morphing ability is critical for raptors to achieve high maneuvering flight,which can be a good bionic inspiration for unmanned aerial vehicles(UAV)design.However,morphing wing motions of Falco peregrinus with multi postures cannot be consulted since such a motion database was nonexistent.This study aimed to provide data reference for future research in wing morphing kinetics.We used the computed tomography(CT)approach to obtain nine critical postures of the Falco peregrinus wing skeleton,followed with motion analysis of each joint and bone.Based on the obtained motion database,a six-bar kinematic model was proposed to regenerate wing motions with a high fidelity. 展开更多
关键词 RAPTOR wing morphing skeletal mechanism CT scans six-bar model
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Hardware-in-loop adaptive neural control for a tiltable V-tail morphing aircraft
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作者 Fu-xiang Qiao Jing-ping Shi +1 位作者 Xiao-bo Qu Yong-xi Lyu 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第4期197-211,共15页
This paper proposes an adaptive neural control(ANC)method for the coupled nonlinear model of a novel type of embedded surface morphing aircraft which has a tiltable V-tail.A nonlinear model with sixdegrees-of-freedom ... This paper proposes an adaptive neural control(ANC)method for the coupled nonlinear model of a novel type of embedded surface morphing aircraft which has a tiltable V-tail.A nonlinear model with sixdegrees-of-freedom is established.The first-order sliding mode differentiator(FSMD)is applied to the control scheme to avoid the problem of“differential explosion”.Radial basis function neural networks are introduced to estimate the uncertainty and external disturbance of the model,and an ANC controller is proposed based on this design idea.The stability of the proposed ANC controller is proved using Lyapunov theory,and the tracking error of the closed-loop system is semi-globally uniformly bounded.The effectiveness and robustness of the proposed method are verified by numerical simulations and hardware-in-the-loop(HIL)simulations. 展开更多
关键词 morphing aircraft Back-stepping control Adaptive control Neural networks Radial basis function
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Size effect on light propagation modulation near band edges in one-dimensional periodic structures
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作者 唐洋 王佳俊 +2 位作者 赵星棋 李同宇 石磊 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第5期421-424,共4页
Periodic photonic structures can provide rich modulation in propagation of light due to well-defined band structures.Especially near band edges,light localization and the effect of near-zero refractive index have attr... Periodic photonic structures can provide rich modulation in propagation of light due to well-defined band structures.Especially near band edges,light localization and the effect of near-zero refractive index have attracted wide attention.However,the practically fabricated structures can only have finite size,i.e.,limited numbers of periods,leading to changes of the light propagation modulation compared with infinite structures.Here,we study the size effect on light localization and near-zero refractive-index propagation near band edges in one-dimensional periodic structures.Near edges of the band gap,as the structure's size shrinks,the broadening of the band gap and the weakening of the light localization are discovered.When the size is small,an added layer on the surface will perform large modulation in the group velocity.Near the degenerate point with Dirac-like dispersion,the zero-refractive-index effects like the zero-phase difference and near-unity transmittance retain as the size changes,while absolute group velocity fluctuates when the size shrinks. 展开更多
关键词 one-dimensional(1D)photonic crystal finite-size effect band gap light localization zerorefractive-index effect
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Morphology-Controlled Growth of A1N One-Dimensional Nanostructures 被引量:1
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作者 Ting XIE Min YE +5 位作者 Xiaosheng FANG Zhi JIANG Li CHEN Mingguang KONG Yucheng WU Lide ZHANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2008年第4期608-614,共7页
Aluminum nitride (AIN) nanowires, serrated nanoribbons, and nanoribbons were selectively obtained through a simple chloride assisted chemical vapor deposition process. The morphologies of the products could be contr... Aluminum nitride (AIN) nanowires, serrated nanoribbons, and nanoribbons were selectively obtained through a simple chloride assisted chemical vapor deposition process. The morphologies of the products could be controlled by adjusting the deposition position and the flux of the reactant gas. The morphologies and structures of the AIN products were investigated in detail. The formation mechanism of the as-prepared different morphologies of AIN one-dimensional (ID) nanostructures was discussed on the basis of the experimental results. 展开更多
关键词 Aluminum nitride morphology-controlled growth one-dimensional nanostructure
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A Dugdale-Barenblatt model for elliptical orifice problem with asymmetric cracks in one-dimensional orthorhombic quasicrystals
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作者 Jing ZHANG Guanting LIU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2023年第9期1533-1546,共14页
By means of Muskhelishvili’s method and the technique of generalized conformal mapping,the physical plane problems are transformed into regular mathematical problems in quasicrystals(QCs).The analytical solution to a... By means of Muskhelishvili’s method and the technique of generalized conformal mapping,the physical plane problems are transformed into regular mathematical problems in quasicrystals(QCs).The analytical solution to an elliptical orifice problem with asymmetric cracks in one-dimensional(1D)orthorhombic QCs is obtained.By using the Dugdale-Barenblatt model,the plastic simulation at the crack tip of the elliptical orifice with asymmetric cracks in 1D orthorhombic QCs is performed.Finally,the size of the atomic cohesive force zone is determined precisely,and the size of the atomic cohesive force zone around the crack tip of an elliptical orifice with a single crack or two symmetric cracks is obtained. 展开更多
关键词 one-dimensional(1D)orthorhombic quasicrystal(QC) Dugdale-Barenblatt model atomic cohesive force zone crack
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Robust Damage Detection and Localization Under Complex Environmental Conditions Using Singular Value Decomposition-based Feature Extraction and One-dimensional Convolutional Neural Network
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作者 Shengkang Zong Sheng Wang +3 位作者 Zhitao Luo Xinkai Wu Hui Zhang Zhonghua Ni 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2023年第3期252-261,共10页
Ultrasonic guided wave is an attractive monitoring technique for large-scale structures but is vulnerable to changes in environmental and operational conditions(EOC),which are inevitable in the normal inspection of ci... Ultrasonic guided wave is an attractive monitoring technique for large-scale structures but is vulnerable to changes in environmental and operational conditions(EOC),which are inevitable in the normal inspection of civil and mechanical structures.This paper thus presents a robust guided wave-based method for damage detection and localization under complex environmental conditions by singular value decomposition-based feature extraction and one-dimensional convolutional neural network(1D-CNN).After singular value decomposition-based feature extraction processing,a temporal robust damage index(TRDI)is extracted,and the effect of EOCs is well removed.Hence,even for the signals with a very large temperature-varying range and low signal-to-noise ratios(SNRs),the final damage detection and localization accuracy retain perfect 100%.Verifications are conducted on two different experimental datasets.The first dataset consists of guided wave signals collected from a thin aluminum plate with artificial noises,and the second is a publicly available experimental dataset of guided wave signals acquired on a composite plate with a temperature ranging from 20℃to 60℃.It is demonstrated that the proposed method can detect and localize the damage accurately and rapidly,showing great potential for application in complex and unknown EOC. 展开更多
关键词 Ultrasonic guided waves Singular value decomposition Damage detection and localization Environmental and operational conditions one-dimensional convolutional neural network
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Analysis of Dynamical Behavior of One-Dimensional Real Maps: An Executable Dynamical Programming Software Approach
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作者 Mohammad Sharif Ullah Masuda Akter K. M. Ariful Kabir 《Applied Mathematics》 2023年第9期652-672,共21页
The dynamical behavior of real-world phenomena is implausible graphically due to the complexity of mathematical coding. The present article has mainly focused on some one-dimensional real maps’ dynamical behavior irr... The dynamical behavior of real-world phenomena is implausible graphically due to the complexity of mathematical coding. The present article has mainly focused on some one-dimensional real maps’ dynamical behavior irrespective of using coding. In continuation, linear, quadratic, cubic, higher-order, exponential, logarithmic, and absolute value maps have been used to scrutinize their dynamical behavior, including the characteristics of the orbit of points. Dynamical programming software (DPS.exe) will be proposed as a new technique to ascertain the dynamical behavior of said maps. Thus, a mathematician can automatically determine one-dimensional real maps’ dynamical behavior apart from complicated programming code and analytical solutions. 展开更多
关键词 one-dimensional Map Cobweb Orbit Diagram Fixed Point the Fate of the Orbit
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Thermal-induced interfacial behavior of a thin one-dimensional hexagonal quasicrystal film
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作者 Huayang DANG Dongpei QI +2 位作者 Minghao ZHAO Cuiying FAN C.S.LU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2023年第5期841-856,共16页
In this paper,we investigate the interfacial behavior of a thin one-dimensional(1D)hexagonal quasicrystal(QC)film bonded on an elastic substrate subjected to a mismatch strain due to thermal variation.The contact inte... In this paper,we investigate the interfacial behavior of a thin one-dimensional(1D)hexagonal quasicrystal(QC)film bonded on an elastic substrate subjected to a mismatch strain due to thermal variation.The contact interface is assumed to be nonslipping,with both perfectly bonded and debonded boundary conditions.The Fourier transform technique is adopted to establish the integral equations in terms of interfacial shear stress,which are solved as a linear algebraic system by approximating the unknown phonon interfacial shear stress via the series expansion of the Chebyshev polynomials.The expressions are explicitly obtained for the phonon interfacial shear stress,internal normal stress,and stress intensity factors(SIFs).Finally,based on numerical calculations,we briefly discuss the effects of the material mismatch,the geometry of the QC film,and the debonded length and location on stresses and SIFs. 展开更多
关键词 one-dimensional(1D)hexagonal quasicrystal(QC)film stress intensity factor(SIF) thermal variation Chebyshev polynomial interfacial behavior
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一种基于弯曲结构的线状要素Morphing方法 被引量:15
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作者 邓敏 彭东亮 +1 位作者 徐震 刘慧敏 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2012年第7期2674-2682,共9页
提出一种基于弯曲结构的线状要素Morphing方法。对于2个不同比例尺地图上表达的同一线状要素,首先根据其各自形态特征分别利用约束Delaunay三角网提取线状要素的独立弯曲及其层次结构信息,并用弯曲森林和弯曲树来表达线状要素的弯曲结... 提出一种基于弯曲结构的线状要素Morphing方法。对于2个不同比例尺地图上表达的同一线状要素,首先根据其各自形态特征分别利用约束Delaunay三角网提取线状要素的独立弯曲及其层次结构信息,并用弯曲森林和弯曲树来表达线状要素的弯曲结构。然后,通过识别对应独立弯曲,从高层次到低层次对它们的层次弯曲结构进行识别与匹配,从而将两线状要素分割成多对对应线段。在此基础上,借助常用的插值算法进行Morphing。实验证明,提出的基于弯曲结构的Morphing方法要比已有的方法精度高,并有效保持Morphing过程中内插线状要素弯曲特征的一致性。 展开更多
关键词 morphing 形状内插 弯曲 线状要素 制图综合
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成像测井图像的动态增强及Morphing方法 被引量:11
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作者 闫建平 首祥云 +2 位作者 邵在平 姚声贤 赵中明 《测井技术》 CAS CSCD 2006年第4期364-366,共3页
未经图像学处理的成像测井原始图像对地层特征的反映通常并不明显。静态标准化图像亮度大,适合于观察变化范围较大的测井响应和岩性对比分析结果。动态增强图像增加了井孔特殊区域的特征清晰度,但所用的短窗长会使图像出现台阶现象,平... 未经图像学处理的成像测井原始图像对地层特征的反映通常并不明显。静态标准化图像亮度大,适合于观察变化范围较大的测井响应和岩性对比分析结果。动态增强图像增加了井孔特殊区域的特征清晰度,但所用的短窗长会使图像出现台阶现象,平滑滤波、重采样都不能很好地消除这种台阶。在用图像直方图局部均衡化实现动态增强研究的基础上,采用Morphing技术对颜色进行线性插值,即用一个控制序列控制图像渐变过程,在颜色混合时消除中间帧图像上的一些不良表现,对动态增强图像台阶上下作颜色线性插值,使图像渐变。结果表明此方法能够有效地解决由于图像动态增强而产生的台阶问题。 展开更多
关键词 成像测井 动态增强图像 直方图 局部均衡化 morphing技术
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基于L系统和三维Morphing的器官生长建模 被引量:6
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作者 朱庆生 许允催 +2 位作者 曾令秋 方凡 吕中华 《计算机工程》 CAS CSCD 北大核心 2010年第10期196-198,共3页
为解决植物器官生长过程中的变形问题,提出一种基于L系统和三维Morphing的器官生长建模方法。该方法以L系统描述植物的拓扑结构,以三维Morphing模拟植物叶片和果实的变形过程,并根据花的特殊结构引入一种模块化建模方法以实现花的开放... 为解决植物器官生长过程中的变形问题,提出一种基于L系统和三维Morphing的器官生长建模方法。该方法以L系统描述植物的拓扑结构,以三维Morphing模拟植物叶片和果实的变形过程,并根据花的特殊结构引入一种模块化建模方法以实现花的开放过程。以辣椒为例展示建模过程,实验结果表明,该算法能解决植物器官变形问题,提高建模效率。 展开更多
关键词 L系统 三维morphing 虚拟植物 植物生长建模
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面状居民地Morphing变换的转向角函数法 被引量:10
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作者 谢天 李精忠 《测绘学报》 EI CSCD 北大核心 2015年第7期797-804,共8页
提出了一种基于转向角函数的面状居民地morphing方法。针对同名居民地实体在两个不同比例尺下的表达,将传统矢量GIS的坐标串表达形式转为转向角函数表达形式,基于转向角函数分析多边形边特征在不同比例尺下的共性与差异,融合得到了任意... 提出了一种基于转向角函数的面状居民地morphing方法。针对同名居民地实体在两个不同比例尺下的表达,将传统矢量GIS的坐标串表达形式转为转向角函数表达形式,基于转向角函数分析多边形边特征在不同比例尺下的共性与差异,融合得到了任意中间比例尺下的多边形的转向角函数,最后将中间比例尺下的转向角函数还原为矢量坐标串形式,获得多边形在对应尺度的中间插值形状。试验证明,本文提出的基于转向角函数的面状居民地morphing方法对面状居民地多边形具有较好的适应性,能在保持直角化边界特征的前提下实现连续地图综合与多尺度表达。 展开更多
关键词 转向角函数 morphing 多尺度表达 连续综合
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基于域Morphing算法的手背静脉识别 被引量:3
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作者 韩笑 赵政达 王天明 《吉林大学学报(理学版)》 CAS CSCD 北大核心 2013年第2期294-296,共3页
根据人体手背静脉图像的结构及特点,提出一种快速域Morphing算法对手背静脉图像进行变换,通过对图像进行相似度计算实现了静脉识别.
关键词 特征提取 morphing 优化算法
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基于Morphing方法的断层面重构 被引量:2
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作者 刘光伟 宋佳琛 +1 位作者 白润才 李鹏 《重庆大学学报(自然科学版)》 EI CAS CSCD 北大核心 2018年第2期69-77,共9页
为提高稀疏数据条件下断层面形态重构的准确性和光滑性,通过对断层面建模数据分析与优选,提出基于Morphing方法构建相邻稀疏断层线的过渡曲线,同时基于CD-TIN重构平稳光滑断层面的方法。以Morphing方法基础理论,分析了断层线数据特征点... 为提高稀疏数据条件下断层面形态重构的准确性和光滑性,通过对断层面建模数据分析与优选,提出基于Morphing方法构建相邻稀疏断层线的过渡曲线,同时基于CD-TIN重构平稳光滑断层面的方法。以Morphing方法基础理论,分析了断层线数据特征点对应关系,采用距离二分法实现了特征点匹配;参照有限外推法,确定了断层尖灭位置;采用拉格朗日插值方法对断层线节点曲线进行趋势外推,实现相交断层面切削;最终实现了稀疏数据下断层面的光滑构建。通过对比Kriging插值方法和Morphing方法生成的断层面模型形态,结果表明:Morphing方法生成的断层面形态平滑自然,可以更好地还原断层弯曲细节。 展开更多
关键词 稀疏数据 断层 三维模型 morphing方法
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