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The Planning, Organization and Management of Post-disaster Reconstruction of the Lushan Earthquake Based on the Local as the Main Body 被引量:3
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作者 Zeng Fan Qiu Jian Han Xiao 《Earthquake Research in China》 CSCD 2016年第1期131-144,共14页
A new organization and management mechanism with the local government as the main body was created during the post-disaster reconstruction of the "4. 20 " Lushan earthquake,in which the experiences and lesso... A new organization and management mechanism with the local government as the main body was created during the post-disaster reconstruction of the "4. 20 " Lushan earthquake,in which the experiences and lessons were drawn from the "5. 12"Wenchuan earthquake. Correspondingly, the local government conducted an exploration of the organization and management mode in the field of planning and construction. The effective experiences have been accumulated, including working out a full coverage planning,taking the leading part in the urban-rural planning,and exercising whole space control over the disaster area. An innovation management mode named as "Five Generals Pattern"was implemented in the construction projects. In view that the rural housing reconstruction was a weak link, a new approach to improving the construction management was investigated,by means of strengthening on-site supervision,establishing a technical platform,and bolstering public participation. 展开更多
关键词 PLANNING organization and management Lushan earthquake Wenchuanearthquake post-disaster reconstruction The local as the main body FiveGenerals Pattern
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Projects Lists Relating to Post-disaster Reconstruction
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《China's Foreign Trade》 2008年第23期61-66,共6页
Aba Prefecture Company Name:Sichuan Xintong New Materials Co.Ltd. Address:Shuimo,Wenchuan Nature of Business:Private Project Name:Processing and Sale of Tourism Products Details:Producing and processing of Natural cry... Aba Prefecture Company Name:Sichuan Xintong New Materials Co.Ltd. Address:Shuimo,Wenchuan Nature of Business:Private Project Name:Processing and Sale of Tourism Products Details:Producing and processing of Natural crystal products,man-made gem and other 展开更多
关键词 PDP COC LINE Projects Lists Relating to post-disaster reconstruction NATURE LED CO
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Post-Disaster Reconstruction of Alishan Tsou Tribe in Different Place and Sustainable Development
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作者 Hsiao-Ming Chang Chiu-Hui Hung Han-Ming Lin 《Open Journal of Applied Sciences》 2021年第4期458-468,共11页
After the Morakot disaster in 2009, the affected indigenous tribes suffered from the government’s use of permanent housing as a single reconstruction option, which forced the victims to leave their original land for ... After the Morakot disaster in 2009, the affected indigenous tribes suffered from the government’s use of permanent housing as a single reconstruction option, which forced the victims to leave their original land for a new life in a different reconstruction mode. The purpose of this study is to explore the ways adopted by tribal residents to maintain their own culture and tribal life in the process of disaster, post disaster reconstruction and post disaster adjustment. Veoveoana Village in Taiwan is an indigenous tribe that relocated after a disaster and was reconstructed and developed through tourism development. This study performed the research by participant observation and in-depth interviews on Veoveoana Village. The analytical results showed that: 1) development of the tourism industry can result in cultural reconstruction of the post-disaster tribe and maintain the people’s incomes;2) although the government constantly assists with the rehabilitation of tribal industry by various policies, the implementation cannot effectively continue and the outcome is insignificant;3) due to the gap between permanent prefabricated housing and original tribal cultural features, the residential rate is not high. According to the research findings, it is suggested that, in the process of post-disaster reconstruction, the government and private non-profit organizations should respect the intention of the majority of the indigenous people. In addition, it should cultivate professional manpower for the subsidized projects. 展开更多
关键词 post-disaster reconstruction Typhoon Morakot Indigenous Tourism Veoveoana Village Tsou Culture
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Tribal Councils as a Decision-Making Mechanism for Post-disaster Reconstructions: A Case Study of Ulaljuc
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作者 Chaohsing Huang Paiteng Cheng +2 位作者 Hsin-Chieh Kao Tjepelang Ruvaniyaw Yuhsin Chen 《Sociology Study》 2013年第4期261-268,共8页
Since the 1990s, indigenous people in Taiwan have engaged in tribal councils for the purpose of integrating the tribal authority and the modern administrative system. The establishment of tribal councils provides a co... Since the 1990s, indigenous people in Taiwan have engaged in tribal councils for the purpose of integrating the tribal authority and the modern administrative system. The establishment of tribal councils provides a communicative forum for tribal leaders, village, and the association of community development to make decisions of common tribal affairs. When disasters happen, the internal tribal response strategies and external assistance mechanisms might cooperate through either traditional or modern administrative systems. The research focused on how these organizations, while in interim housing, influenced the reconstruction and rehabilitation after disasters. The research's findings suggested that tribal councils, a pre-existing mechanism, seemed to be an appropriate forum for negotiation and decision-making for tribal affairs. 展开更多
关键词 Interim housing tribal council post-disaster reconstruction
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Variational regularization method of solving the Cauchy problem for Laplace's equation: Innovation of the Grad–Shafranov(GS) reconstruction 被引量:4
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作者 颜冰 黄思训 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第10期650-655,共6页
The simplified linear model of Grad-Shafranov (GS) reconstruction can be reformulated into an inverse boundary value problem of Laplace's equation. Therefore, in this paper we focus on the method of solving the inv... The simplified linear model of Grad-Shafranov (GS) reconstruction can be reformulated into an inverse boundary value problem of Laplace's equation. Therefore, in this paper we focus on the method of solving the inverse boundary value problem of Laplace's equation. In the first place, the variational regularization method is used to deal with the ill- posedness of the Cauchy problem for Laplace's equation. Then, the 'L-Curve' principle is suggested to be adopted in choosing the optimal regularization parameter. Finally, a numerical experiment is implemented with a section of Neumann and Dirichlet boundary conditions with observation errors. The results well converge to the exact solution of the problem, which proves the efficiency and robustness of the proposed method. When the order of observation error δ is 10-1, the order of the approximate result error can reach 10-3. 展开更多
关键词 Grad-Shafranov reconstruction variational regularization method Cauchy problem
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Reconstruction method of differentiated backprojection-projection onto convex sets in the interior problem and design of bone-nail model
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作者 吕东辉 史安生 《Journal of Shanghai University(English Edition)》 CAS 2010年第2期131-136,共6页
This work focuses on the application of the reconstruction method of differentiated backprojection (DBP)-projection onto convex sets (POCS) in the interior problem.First,we present the definition of the interior p... This work focuses on the application of the reconstruction method of differentiated backprojection (DBP)-projection onto convex sets (POCS) in the interior problem.First,we present the definition of the interior problem and real truncated Hilbert transform,and then outline the implementation steps of DBP-POCS.After that,we introduce the middle-part known condition for region of interest (ROI) accurate reconstruction and the unique condition of the interior problem,and verify the uniqueness and stability of the interior problem accurate reconstruction through numerical experiments,and then compare the results for the interior problem in reconstruction images using filtered backprojection (FBP).In addition,the authors also design the application models of ROI reconstruction and make an initial attempt to the application of DBP-POCS method in the interior problem. 展开更多
关键词 region of interest (ROI) reconstruction truncated Hilbert transform DBP-POCS method interior problem
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An algorithm for computed tomography image reconstruction from limited-view projections 被引量:5
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作者 王林元 李磊 +3 位作者 闫镔 江成顺 王浩宇 包尚联 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第8期642-647,共6页
With the development of the compressive sensing theory, the image reconstruction from the projections viewed in limited angles is one of the hot problems in the research of computed tomography technology. This paper d... With the development of the compressive sensing theory, the image reconstruction from the projections viewed in limited angles is one of the hot problems in the research of computed tomography technology. This paper develops an iterative algorithm for image reconstruction, which can fit the most cases. This method gives an image reconstruction flow with the difference image vector, which is based on the concept that the difference image vector between the reconstructed and the reference image is sparse enough. Then the l1-norm minimization method is used to reconstruct the difference vector to recover the image for flat subjects in limited angles. The algorithm has been tested with a thin planar phantom and a real object in limited-view projection data. Moreover, all the studies showed the satisfactory results in accuracy at a rather high reconstruction speed. 展开更多
关键词 limited-view problem computed tomography image reconstruction algorithms reconstruction-reference difference algorithm adaptive steepest descent-projection onto convex sets algorithm
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Reconstruction of impact force of mechanical press in time domain
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作者 何鹏程 贾方 《Journal of Southeast University(English Edition)》 EI CAS 2011年第4期400-404,共5页
To overcome the difficulty in directly measuring the impact force of a mechanical press, the inverse theory is employed to reconstruct the impact force from the corresponding response data in time domain. The nature o... To overcome the difficulty in directly measuring the impact force of a mechanical press, the inverse theory is employed to reconstruct the impact force from the corresponding response data in time domain. The nature of ill-posedness of impact force reconstruction is explored through singular value decomposition (SVD) and the Tikhonov regularization is utilized to deal with the ill-posedness, in which the optimal parameter is chosen in light of the L-curve criterion and the generalized cross- validation (GCV). The experimentally measured strain responses of upper and lower dies of the press are chosen as source data for impact force reconstruction, and the corresponding numerical results are compared with the experimental measurements, which verifies the effectiveness of the reconstruction method. 展开更多
关键词 mechanical press impact force reconstruction inverse problem REGULARIZATION
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A Novel Method for the Reconstruction of Road Profiles from Measured Vehicle Responses Based on the Kalman Filter Method 被引量:2
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作者 Jianghui Zhu Xiaotong Chang +2 位作者 Xueli Zhang Yutai Su Xu Long 《Computer Modeling in Engineering & Sciences》 SCIE EI 2022年第3期1719-1735,共17页
The estimation of the disturbance input acting on a vehicle from its given responses is an inverse problem.To overcome some of the issues related to ill-posed inverse problems,this work proposes a method of reconstruc... The estimation of the disturbance input acting on a vehicle from its given responses is an inverse problem.To overcome some of the issues related to ill-posed inverse problems,this work proposes a method of reconstructing the road roughness based on the Kalman filter method.A half-car model that considers both the vehicle and equipment is established,and the joint input-state estimation method is used to identify the road profile.The capabilities of this methodology in the presence of noise are numerically demonstrated.Moreover,to reduce the influence of the driving speed on the estimation results,a method of choosing the calculation frequency is proposed.A road vibration test is conducted to benchmark the proposed method. 展开更多
关键词 Road profile reconstruction inverse problems precise integration Kalman filter spatial resolution
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Application of Reconstruction and Optimization Algorithms in Optical Tomography 被引量:1
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作者 Umair Sajjad Hashmi Raheel Muzzammel +1 位作者 Rabia Arshad Saba Mehmood 《World Journal of Engineering and Technology》 2020年第2期188-203,共16页
Optical tomography is a non-invasive technique that uses visible or near infrared radiation to analyze biological tissues. Researchers take immense attention towards advancement in optical tomography because of its lo... Optical tomography is a non-invasive technique that uses visible or near infrared radiation to analyze biological tissues. Researchers take immense attention towards advancement in optical tomography because of its low cost and an advantage of providing anatomical information. Based on the information of optical characteristics, forward and inverse problem of tomography are solved. In this research, finite element method is employed for forward problem and gradient-based optimization algorithm is developed for inverse problem of optical tomography. It is found from simulations that information about imaging is processed more distinctly and in less computational time. Normal and abnormal conditions in imaging are readily distinguished.?Simulations are carried out in Matlab. Different scenarios are developed and are simulated to validate the performance of reconstruction and optimization algorithms in optical tomography. 展开更多
关键词 Optical TOMOGRAPHY MEDICAL Imaging Image reconstruction Optimization FORWARD problem INVERSE problem
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Source reconstruction for bioluminescence tomography via L_(1/2)regularization 被引量:1
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作者 Jingjing Yu Qiyue Li Haiyu Wang 《Journal of Innovative Optical Health Sciences》 SCIE EI CAS 2018年第2期8-16,共9页
Bioluminescence tomography(BLT)is an important noninvasive optical molecular imaging modality in preclinical research.To improve the image quality,reconstruction algorithms have to deal with the inherent ill-posedness... Bioluminescence tomography(BLT)is an important noninvasive optical molecular imaging modality in preclinical research.To improve the image quality,reconstruction algorithms have to deal with the inherent ill-posedness of BLT inverse problem.The sparse characteristic of bioluminescent sources in spatial distribution has been widely explored in BLT and many L1-regularized methods have been investigated due to the sparsity-inducing properties of L1 norm.In this paper,we present a reconstruction method based on L_(1/2) regularization to enhance sparsity of BLT solution and solve the nonconvex L_(1/2) norm problem by converting it to a series of weighted L1 homotopy minimization problems with iteratively updated weights.To assess the performance of the proposed reconstruction algorithm,simulations on a heterogeneous mouse model are designed to compare it with three representative sparse reconstruction algorithms,including the weighted interior-point,L1 homotopy,and the Stagewise Orthogonal Matching Pursuit algorithm.Simulation results show that the proposed method yield stable reconstruction results under different noise levels.Quantitative comparison results demonstrate that the proposed algorithm outperforms the competitor algorithms in location accuracy,multiple-source resolving and image quality. 展开更多
关键词 Bioluminescence tomography L_(1/2)regularization inverse problem reconstruction algorithm
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The Matrix Transform for Reconstruction on Finite-Element-Based Photoacoustic Tomography 被引量:1
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作者 Hui Zhang Si Chen Jiajun Wang 《Journal of Computer and Communications》 2016年第3期54-60,共7页
Numerical Finite-element method (FEM) based algorithms have been widely applied for the reconstruction of the photoacoustic image. As compared with the traditional analytic methods, the FEM based methods can be easily... Numerical Finite-element method (FEM) based algorithms have been widely applied for the reconstruction of the photoacoustic image. As compared with the traditional analytic methods, the FEM based methods can be easily used to deal with problems with irregularly shaped imaging domain. However, the FEM based algorithms are usually computationally intensive because repeated manipulations of matrices with larger size are needed during the reconstruction process. To tackle such a problem, a novel method is proposed for reducing the size of the matrix to be inversed during the reconstruction process and hence speed up the inverse reconstruction without any sacrifice of the reconstruction accuracy. 展开更多
关键词 Inverse problems Medical and Biological Imaging Image reconstruction Techniques
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A Compton scattering image reconstruction algorithm based on total variation minimization
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作者 李守鹏 王林元 +2 位作者 闫镔 李磊 刘拥军 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第10期563-569,共7页
Compton scattering imaging is a novel radiation imaging method using scattered photons.Its main characteristics are detectors that do not have to be on the opposite side of the source,so avoiding the rotation process.... Compton scattering imaging is a novel radiation imaging method using scattered photons.Its main characteristics are detectors that do not have to be on the opposite side of the source,so avoiding the rotation process.The reconstruction problem of Compton scattering imaging is the inverse problem to solve electron densities from nonlinear equations,which is ill-posed.This means the solution exhibits instability and sensitivity to noise or erroneous measurements.Using the theory for reconstruction of sparse images,a reconstruction algorithm based on total variation minimization is proposed.The reconstruction problem is described as an optimization problem with nonlinear data-consistency constraint.The simulated results show that the proposed algorithm could reduce reconstruction error and improve image quality,especially when there are not enough measurements. 展开更多
关键词 Compton scattering tomography inverse problem image reconstruction SPARSE total variation
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Reconstruction of the Sturm-Liouville operator with discontinuities from a particular set of eigenvalues
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作者 XU Xiao-chuan YANG Chuan-fu 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2018年第2期225-233,共9页
Sturm-Liouville operators on a finite interval with discontinuities are considered. We give a uniqueness theorem for determining the potential and the parameters in boundary and under discontinuous conditions from a p... Sturm-Liouville operators on a finite interval with discontinuities are considered. We give a uniqueness theorem for determining the potential and the parameters in boundary and under discontinuous conditions from a particular set of eigenvalues, and provide corresponding reconstruction algorithm, which can be applicable to McLaughlin-Rundell's uniqueness theorem (see J. Math. Phys. 28, 1987). 展开更多
关键词 Sturm-Liouville operator discontinuous condition inverse spectral problem reconstruction al-gorithm
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Electrical Impedance Tomography Image Reconstruction Using Iterative Lavrentiev and L-Curve-Based Regularization Algorithm
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作者 Wenqin WANG Jingye CAI Lian YANG 《Journal of Electromagnetic Analysis and Applications》 2010年第1期45-50,共6页
Electrical impedance tomography (EIT) is a technique for determining the electrical conductivity and permittivity distribution inside a medium from measurements made on its surface. The impedance distribution reconstr... Electrical impedance tomography (EIT) is a technique for determining the electrical conductivity and permittivity distribution inside a medium from measurements made on its surface. The impedance distribution reconstruction in EIT is a nonlinear inverse problem that requires the use of a regularization method. The generalized Tikhonov regularization methods are often used in solving inverse problems. However, for EIT image reconstruction, the generalized Tikhonov regularization methods may lose the boundary information due to its smoothing operation. In this paper, we propose an iterative Lavrentiev regularization and L-curve-based algorithm to reconstruct EIT images. The regularization parameter should be carefully chosen, but it is often heuristically selected in the conventional regularization-based reconstruction algorithms. So, an L-curve-based optimization algorithm is used for selecting the Lavrentiev regularization parameter. Numerical analysis and simulation results are performed to illustrate EIT image reconstruction. It is shown that choosing the appropriate regularization parameter plays an important role in reconstructing EIT images. 展开更多
关键词 Electrical Impedance Tomography (EIT) reconstruction ALGORITHM ITERATIVE Lavrentiev REGULARIZATION Parameter Inverse problem.
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HYBRID REGULARIZED CONE-BEAM RECONSTRUCTION FOR AXIALLY SYMMETRIC OBJECT TOMOGRAPHY
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作者 Xinge LI Suhua WEI +1 位作者 Haibo XU Chong CHEN 《Acta Mathematica Scientia》 SCIE CSCD 2022年第1期403-419,共17页
In this paper,we consider 3 D tomographic reconstruction for axially symmetric objects from a single radiograph formed by cone-beam X-rays.All contemporary density reconstruction methods in high-energy X-ray radiograp... In this paper,we consider 3 D tomographic reconstruction for axially symmetric objects from a single radiograph formed by cone-beam X-rays.All contemporary density reconstruction methods in high-energy X-ray radiography are based on the assumption that the cone beam can be treated as fan beams located at parallel planes perpendicular to the symmetric axis,so that the density of the whole object can be recovered layer by layer.Considering the relationship between different layers,we undertake the cone-beam global reconstruction to solve the ambiguity effect at the material interfaces of the reconstruction results.In view of the anisotropy of classical discrete total variations,a new discretization of total variation which yields sharp edges and has better isotropy is introduced in our reconstruction model.Furthermore,considering that the object density consists of continually changing parts and jumps,a high-order regularization term is introduced.The final hybrid regularization model is solved using the alternating proximal gradient method,which was recently applied in image processing.Density reconstruction results are presented for simulated radiographs,which shows that the proposed method has led to an improvement in terms of the preservation of edge location. 展开更多
关键词 high-energy X-ray radiography cone-beam global reconstruction inverse problem total variation alternating proximal gradient method
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Reconstruction of Temperature Field in 3-D, Absorbing, Emitting, and Anisotropically Scattering Medium
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作者 赵敬德 刘妮 钟珂 《Journal of Donghua University(English Edition)》 EI CAS 2006年第2期17-21,共5页
The soft measurement technology of flame temperature field is an efficient method to learn the combustion status in furnace. Generally, it reconstructs the temperature field in furnace through the image of flame, whic... The soft measurement technology of flame temperature field is an efficient method to learn the combustion status in furnace. Generally, it reconstructs the temperature field in furnace through the image of flame, which is a process to solve radiative inverse problem. In this paper, the flame of pulverized coal is considered as 3-D, absorbing, emitting, and anisotropically scattering non-gray medium. Through the study on inverse problem of radiative heat transfer, the temperature field in this kind of medium has been reconstructed. The mechanism of 3-D radiative heat transfer in a rectangular media, which is 2 m×3 m× 5 m and full of CO2, N2 and carbon particles, is studied with Monte Carlo method. The 3-D temperature field in this rectangular space is reconstructed and the influence of particles density profile is discussed. 展开更多
关键词 reconstruction of 3-D temperature field anisotropically scattering non-gray medium Monte Carlo method density profile inverse problem of radiative heat transfer.
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Implicit Shape Reconstruction of Unorganized Points Using PDE-Based Deformable 3D Manifolds 被引量:2
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作者 Elena Franchini Serena Morigi Fiorella Sgallari 《Numerical Mathematics(Theory,Methods and Applications)》 SCIE 2010年第4期405-430,共26页
In this work we consider the problem of shape reconstruction from an unorganized data set which has many important applications in medical imaging, scientific computing, reverse engineering and geometric modelling. Th... In this work we consider the problem of shape reconstruction from an unorganized data set which has many important applications in medical imaging, scientific computing, reverse engineering and geometric modelling. The reconstructed surface is obtained by continuously deforming an initial surface following the Partial Differential Equation (PDE)-based diffusion model derived by a minimal volume-like variational formulation. The evolution is driven both by the distance from the data set and by the curvature analytically computed by it. The distance function is computed by implicit local interpolants defined in terms of radial basis functions. Space discretization of the PDE model is obtained by finite co-volume schemes and semi-implicit approach is used in time/scale. The use of a level set method for the numerical computation of the surface reconstruction allows us to handle complex geometry and even changing topology,without the need of user-interaction. Numerical examples demonstrate the ability of the proposed method to produce high quality reconstructions. Moreover, we show the effectiveness of the new approach to solve hole filling problems and Boolean operations between different data sets. 展开更多
关键词 Shape reconstruction RBF interpolation PDE diffusion model segmentation
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结合竞争交互策略和淘汰重组机制的异构多蚁群算法 被引量:1
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作者 冯晨 游晓明 刘升 《系统仿真学报》 CAS CSCD 北大核心 2024年第1期232-248,共17页
针对传统的蚁群算法在解决旅行商问题时(traveling salesman problem,TSP)存在着收敛速度慢、容易陷入局部最优等问题,提出了一种结合竞争交互策略和淘汰重组机制的异构多蚁群算法。建立一个异构多种群系统,算法采用竞争交互策略,根据... 针对传统的蚁群算法在解决旅行商问题时(traveling salesman problem,TSP)存在着收敛速度慢、容易陷入局部最优等问题,提出了一种结合竞争交互策略和淘汰重组机制的异构多蚁群算法。建立一个异构多种群系统,算法采用竞争交互策略,根据不同时期各种群的汉明距离来自适应的调节交互周期;并利用竞争系数来差异化匹配交互对象,经过匹配后的交互对象之间通过最优解和信息素矩阵进行交互,通过该机制实现了算法收敛速度和多样性的平衡。算法采用了淘汰重组机制,会定期对寻优能力差的种群进行淘汰与重组,以加快算法的求解精度。采用多组不同规模的TSP算例进行仿真实验,结果表明,该算法在提高求解精度和收敛速度方面表现更优。 展开更多
关键词 蚁群算法 异构多种群 竞争交互 淘汰重组 旅行商问题
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PBDB数据库在古地理重建中的重要应用进展
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作者 王晓楠 任强 +5 位作者 侯明才 董俊玲 陈安清 马超 钟瀚霆 郑栋宇 《沉积与特提斯地质》 CAS CSCD 北大核心 2024年第1期34-44,共11页
大数据时代的信息技术革命带来了科学研究的数字化变革,作为地球科学领域开展数字化科研重要里程碑的古生物数据库Paleobiology Database(PBDB),为古地理研究提供了重要的数据支撑。通过调研PBDB数据库平台内容及其在古地理重建中的应... 大数据时代的信息技术革命带来了科学研究的数字化变革,作为地球科学领域开展数字化科研重要里程碑的古生物数据库Paleobiology Database(PBDB),为古地理研究提供了重要的数据支撑。通过调研PBDB数据库平台内容及其在古地理重建中的应用实例,总结PBDB数据库目前在古地理重建中存在的问题,展望其未来的发展方向。结果表明:(1)古生物数据库包含大量的可溯源数据,是古生物领域研究的重要信息来源和成果交流平台,其中PBDB数据库具有可视化特点,能提供多种数据检索和下载方式,是古地理重建工作的首选古生物数据库;(2)PBDB数据库的分类学和采集记录数据,在约束古地理位置、修订古气候带划分方案、定量古高程古水深、校正古海岸线等古地理重建领域具有明显优势;(3)古生物数据库偏向于古生物研究领域,且古生物记录的历史可能存在偏差和不完整性,其在古地理重建中起辅助约束作用,而非绝对途径;(4)如何实现古生物数据库中数据的自动分类、筛选,如何精确约束古板块位置的相对经度,如何提升古气候、古高程、古水深等研究的精确性,是应用PBDB数据库进行古地理重建的重要发展方向。 展开更多
关键词 PBDB数据库 古生物化石 古地理重建 现存问题 应用展望
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