全文获取类型
收费全文 | 52篇 |
免费 | 0篇 |
专业分类
电工技术 | 17篇 |
金属工艺 | 1篇 |
无线电 | 18篇 |
一般工业技术 | 1篇 |
冶金工业 | 1篇 |
原子能技术 | 1篇 |
自动化技术 | 13篇 |
出版年
2022年 | 1篇 |
2017年 | 1篇 |
2015年 | 1篇 |
2012年 | 2篇 |
2011年 | 3篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 5篇 |
2006年 | 5篇 |
2005年 | 1篇 |
2004年 | 5篇 |
2003年 | 4篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1998年 | 5篇 |
1996年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有52条查询结果,搜索用时 31 毫秒
1.
2.
Garreau M Coatrieux JL Collorec R Chardenon C 《IEEE transactions on medical imaging》1991,10(2):122-131
An approach to the three-dimensional reconstruction of coronary arteries is presented. The principal objective is to show how modeling of a vascular network, together with algorithmic procedures, can lead to accurate 3-D structure and feature labeling. The labeling problem is stated directly within the 3-D reconstruction framework. The reconstruction ambiguities inherent to biplane techniques are solved by means of a knowledge base, modeling of the object, and heuristic rules. Feasibility in near-real situations has been demonstrated. The critical importance of the object 3-D reference to achieving the data and modeling matching is emphasized, and a way to deal with it is pointed out. The overall system implies an incremental development in methodologies and experiments. All of them have been elaborated and tested independently, and the most appropriate ones have been selected for integration into a modular system. All the stages of the process (calibration, segmentation, reconstruction, and display) are discussed, with the main focus on modeling. Examples of automatic reconstruction from a phantom are provided. 相似文献
3.
Youssef Bokhabrine Ralph Seulin Lew F. C. Lew Yan Voon Patrick Gorria Gouenou Girardin Miguel Gomez Daniel Jobard 《Machine Vision and Applications》2012,23(3):417-425
During industrial forging of hot metallic shells, it is necessary to regularly measure the dimensions of the parts, especially
the inner and outer diameters and the thickness of the walls. A forging sequence lasts 2 h or more during which the diameter
of the shell is regularly measured in order to decide when to stop the forging process. For better working conditions, for
the safety of the blacksmiths, and for a faster and more accurate measurement, we have developed a novel system based on two
commercially available time of flight laser scanners for the measurement of the diameters of hot cylindrical metallic shells
during the forging process. The advantages of using laser scanners are that they can be placed very far from the hot shell,
more than 15 m, while at the same time giving an accurate point cloud from which three-dimensional views of the shell can
be reconstructed and diameter measurements done. Moreover, more accurate measurement is achieved in less time with the laser
system than with the conventional method using a large ruler. The system has been successfully used to measure the diameters
of hot cylindrical metallic shells. 相似文献
4.
The present work describes a Bayesian maximum a posteriori (MAP) method using a statistical multiscale wavelet prior model. Rather than using the orthogonal discrete wavelet transform (DWT), this prior is built on the translation invariant wavelet transform (TIWT). The statistical modeling of wavelet coefficients relies on the generalized Gaussian distribution. Image reconstruction is performed in spatial domain with a fast block sequential iteration algorithm. We study theoretically the TIWT MAP method by analyzing the Hessian of the prior function to provide some insights on noise and resolution properties of image reconstruction. We adapt the key concept of local shift invariance and explore how the TIWT MAP algorithm behaves with different scales. It is also shown that larger support wavelet filters do not offer better performance in contrast recovery studies. These theoretical developments are confirmed through simulation studies. The results show that the proposed method is more attractive than other MAP methods using either the conventional Gibbs prior or the DWT-based wavelet prior. 相似文献
5.
Haigron P. Limin Luo Coatrieux J.-L. 《IEEE engineering in medicine and biology magazine》2009,28(4):96-98
M edical robotics, computer- assisted surgery (CAS), image-guided therapy (IGT), and the like emerged more than 20 years ago, and many advances have been made since. Conferences and workshops have been organized; scientific contributions, position papers, and patents have been published; new academic societies have been launched; and companies were created all over the world to propose methods, devices, and systems in the area. Researchers in robotics, computer vision and graphics, electronics, mechanics, biomedical engineers, physicians, and surgeons have been involved, thus demonstrating the enthusiasm for this emerging field. Their commitments emphasize the transdisciplinary nature of the efforts to be made. However, the effective dissemination of CAS-IGT systems in medical disciplines remains limited. There are several reasons that may explain this situation, among which the effective demonstration of patient benefits and cost savings, the reluctance of surgeons or therapists to use them, and, of course, the technological breakthroughs are still expected. This series of articles attempts to point out some of them and will also show that many opportunities in computer-assisted interventions are open in the near future. 相似文献
6.
3D navigation in medicine 总被引:8,自引:0,他引:8
Haigron P. Le Berre G. Coatrieux J.L. 《IEEE engineering in medicine and biology magazine》1996,15(2):70-78
The field of medical imaging has progressed dramatically. Advances have been both methodological (vision and analysis algorithms) and technological (processing, storage, and communication), despite often troublesome shortcomings. The author discusses the application of virtual reality, virtual sensor modelling and image rendering in the medical field. He shows the initial outline of a navigation into 3D discrete arrays 相似文献
7.
Kretowski M Rolland Y Bézy-Wendling J Coatrieux JL 《IEEE transactions on medical imaging》2003,22(2):248-257
In this paper, a model-based approach to medical image analysis is presented. It is aimed at understanding the influence of the physiological (related to tissue) and physical (related to image modality) processes underlying the image content. This methodology is exemplified by modeling first, the liver and its vascular network, and second, the standard computed tomography (CT) scan acquisition. After a brief survey on vascular modeling literature, a new method, aimed at the generation of growing three-dimensional vascular structures perfusing the tissue, is described. A solution is proposed in order to avoid intersections among vessels belonging to arterial and/or venous trees, which are physiologically connected. Then it is shown how the propagation of contrast material leads to simulate time-dependent sequences of enhanced liver CT slices. 相似文献
8.
How can deep knowledge be used in CCU monitoring? 总被引:1,自引:0,他引:1
Siregar P. Coatrieux J.L. Mabo P. 《IEEE engineering in medicine and biology magazine》1993,12(4):92-99
The authors discuss the knowledge-based approach to monitoring and how it will contribute to a better assessment of the patient's physiological state. In a CCU (coronary care unit) monitoring context, the full exploitation of biological variables such as the ECG (electrocardiogram) and haemodynamics as well as iatrogenic events and drug-related data may lead to this goal. This integrated view is a means to improve both the robustness of the analysis and the differential diagnosis, thereby leading to a proper hierarchy of alarm-settings and system (re)configuration. Performing fine-grained differential diagnostics is a prerequisite for managing arrhythmias through the most adequate therapeutic actions. Thus, computer-aided therapeutic interventions can be expected to become more appropriate as the knowledge-based systems' internal image of the patient state accords better with reality. Through clinical examples, the authors illustrate basic features of high-level ECG interpretation and show the involvement of shallow and deep knowledge 相似文献
9.
Xuan Zhang Durand L. Senhadji L. Lee H.C. Coatrieux J.-L. 《IEEE transactions on bio-medical engineering》1998,45(8):972-979
A time-frequency scaling transformation based on the matching pursuit (MP) method is developed for the phonocardiogram (PCG). The MP method decomposes a signal into a series of time-frequency atoms by using an iterative process. The modification of the time scale of the PCG can be performed without perceptible change in its spectral characteristics. It is also possible to modify the frequency scale without changing the temporal properties. The technique has been tested on 11 PCGs containing heart sounds and different murmurs. A scaling/inverse-scaling procedure was used for quantitative evaluation of the scaling performance. Both the spectrogram and a MP-based Wigner distribution were used for visual comparison in the time-frequency domain. The results showed that the technique is suitable and effective for the time-frequency scale transformation of both the transient property of the heart sounds and the more complex random property of the murmurs. It is also shown that the effectiveness of the method is strongly related to the optimization of the parameters used for the decomposition of the signals 相似文献
10.
Three-dimensional motion and reconstruction of coronary arteries from biplane cineangiography 总被引:3,自引:0,他引:3
A new approach is described for reconstructing coronary arteries from two sequences of projection images. The estimation of motion is performed on three-dimensional line segments (or centrelines), and is based on a ‘predictionprojection-optimization’ loop. The method copes with time varying properties, deformations and superpositions of vessels. Experiments using simulated and real data have been carried out. and the results found to be robust over a full cycle of a human heart. Local and global kinetic features can then be derived to obtain a greater insight on the cardiac functional state 相似文献