Bibliografías temáticas / Laser Line Detection

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Literatura académica sobre el tema "Laser Line Detection"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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Artículos de revistas sobre el tema "Laser Line Detection"

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Matsushita, Akihiko, Takafumi Morishita, Shun’ichi Kaneko, Hitoshi Ohfuji y Kaoru Fukuda. "Image Detection of Seam Line for Laser Welding Robot". Journal of Robotics and Mechatronics 23, n.º 6 (20 de diciembre de 2011): 919–25. http://dx.doi.org/10.20965/jrm.2011.p0919.

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Automating robot laser welding requires that laser irradiation direction and laser focus positioning influencing welding strength be controlled precisely along the seam line. Since the edge of the welded object can be transformed in processing by such as cutting, bending and grinding, direct measurement is necessary to detect the seam line. A robust image detection method of seam lines is proposed for hand-eye laser welding system equipped with an optical microscope, a CMOS camera and two slit lasers for measurement. The seam line is detected indirectly to utilize the difference between local and global distribution of image of measurement lasers. Results of experiments demonstrated the effectiveness of our proposal.
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Sun, Shangqu, Liping Li, Jing Wang, Shuguang Song, Peng He y Zhongdong Fang. "Reconstruction and Measurement of Irregular Karst Caves Using BLST along the Shield Metro Line". Applied Sciences 10, n.º 1 (4 de enero de 2020): 392. http://dx.doi.org/10.3390/app10010392.

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This study investigated the application of the borehole laser scanning technology (BLST) method in the detection of both dry and water-filled karst caves. In order to solve the problem of excessive laser attenuation during the detection, we designed a test for the characteristics of multiwavelength laser attenuation in water-filled karst caves and studied the influence exerted by various factors, including different wavelengths, different laser power levels, different suspended media, and effect of turbidity on the attenuation coefficient. During the test, we discovered the existence of a “blue-green window” with low turbidity and a “near infrared window” with high turbidity in karst cave water environments. Based on the general survey results of drilling and comprehensive geophysical prospecting, a quantitative method using targeted drilling was proposed to detect the spatial morphology of karst caves in complex environments. We also investigated the effects of complex environmental factors such as suspended media and high turbidity on the laser detection distance and accuracy in karst caves, and established a quantitative matching model of laser wavelengths, laser power, and complex environmental parameters. Based on this, we obtained the best acquisition mode for detecting lasers in different karst development environments. A high-precision, three-dimensional visualized model of a real karst cave was established to quantitatively obtain the characteristic parameters, such as accurate position, three-dimensional shape, space volume, and cave filling type, which was applied to the detection of karst caves along the Jinan subway line.
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Gao, Yan Wei, Yu Jun Zhang, Dong Chen, Ying He, Kun You, Yi Zhou, Jian Guo Liu y Wen Qing Liu. "Oxygen Sensor Based on Tunable Diode Laser Absorption Spectroscopy with a Vertical Cavity Surface-Emitting Laser". Advanced Materials Research 760-762 (septiembre de 2013): 40–44. http://dx.doi.org/10.4028/www.scientific.net/amr.760-762.40.

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Oxygen plays a fundamental role in nature and industrial process, the fast on-line oxygen concentration detection is of great significance. Tunable diode laser absorption spectroscopy (TDLAS) is capable high selective, high sensitive, non-intrusive, this technique exploits the diode laser tunable and narrow bandwidth characteristics, by selecting one absorption line of the target gas to avoid interference from other gas and realize oxygen concentration fast on-line detection. In this paper, we use vertical cavity surface-emitting laser (VCSEL) as the light source, adopting the wavelength modulation spectroscopy and the harmonic detection technology to measure the second harmonic signal and realize oxygen concentration fast on-line detection. The detection concentration range between 0.1% to 40% and detection accuracy is 0.1%.
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Huang, Wen Zhu, Wen Tao Zhang, Huai Xiang Ma, Fang Li y Yan Liang Du. "Distributed Feedback Fiber Laser Rosette for Acoustic Emission Detection". Applied Mechanics and Materials 330 (junio de 2013): 412–17. http://dx.doi.org/10.4028/www.scientific.net/amm.330.412.

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This study aims at providing a practical method in large structure health monitoring. A novel fiber optic rosette based on distributed feedback (DFB) fiber laser for acoustic emission (AE) detection and location is presented. The ultra-narrow line width of the DFB fiber laser will result in high resolution in AE wave detection using a fiber optic interferometric demodulation method. The directivity of the fiber optic rosette is investigated. A rosette with three DFB fiber lasers is tested in the experiment to determine the direction of propagation of AE waves.
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Fernández, Carlos, Vidal Moreno, Belen Curto y J. Andres Vicente. "Clustering and line detection in laser range measurements". Robotics and Autonomous Systems 58, n.º 5 (mayo de 2010): 720–26. http://dx.doi.org/10.1016/j.robot.2009.10.008.

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Wang, Xia, Dai Di Hu y Xiao Li Wang. "Application of Optical Fiber Laser Sensing Technology in Signal Detection". Advanced Materials Research 1078 (diciembre de 2014): 246–49. http://dx.doi.org/10.4028/www.scientific.net/amr.1078.246.

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Signal of ultra high sensitive detection has important application value in the fields of electrical engineering. In recent years there has been a distributed feedback (DFB) fiber laser is a new generation of optical fiber sensing elements of the sensor. It has small size, spectral line width output laser signal is very narrow and low noise advantages, the detection sensitivity can reach high combined with high resolution wavelength demodulation technology. This paper introduces the fiber laser sensor technology and its progress in research and application of technology of detecting signal.
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Xiang, Chengzhi, Xin Ma, Ge Han, Ailin Liang y Wei Gong. "ON-LINE WAVELENGTH CALIBRATION OF PULSED LASER FOR CO2 DIFFERENTIAL ABSORPTION LIDAR". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B1 (2 de junio de 2016): 141–46. http://dx.doi.org/10.5194/isprs-archives-xli-b1-141-2016.

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Differential absorption lidar (DIAL) remote sensing is a promising technology for atmospheric CO<sub>2</sub> detection. However, stringent wavelength accuracy and stability are required in DIAL system. Accurate on-line wavelength calibration is a crucial procedure for retrieving atmospheric CO<sub>2</sub> concentration using the DIAL, particularly when pulsed lasers are adopted in the system. Large fluctuations in the intensities of a pulsed laser pose a great challenge for accurate on-line wavelength calibration. In this paper, a wavelength calibration strategy based on multi-wavelength scanning (MWS) was proposed for accurate on-line wavelength calibration of a pulsed laser for CO<sub>2</sub> detection. The MWS conducted segmented sampling across the CO<sub>2</sub> absorption line with appropriate number of points and range of widths by using a tunable laser. Complete absorption line of CO<sub>2</sub> can be obtained through a curve fitting. Then, the on-line wavelength can be easily found at the peak of the absorption line. Furthermore, another algorithm called the energy matching was introduced in the MWS to eliminate the backlash error of tunable lasers during the process of on-line wavelength calibration. Finally, a series of tests was conducted to elevate the calibration precision of MWS. Analysis of tests demonstrated that the MWS proposed in this paper could calibrate the on-line wavelength of pulsed laser accurately and steadily.
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Wisha, Narindra heronita. "Design of an Object Height Detection Model under the Line of Sight (LoS) Communication Line using a Laser Distance Meter". Jurnal Jartel: Jurnal Jaringan Telekomunikasi 8, n.º 1 (1 de marzo de 2019): 1–6. http://dx.doi.org/10.33795/jartel.v8i1.146.

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The world of telecommunications is growing rapidly so that cellular operator providers are trying to upgrade their networks to meet the needs of their customers with good quality. One effort that can be done is to build a new Base Transceiver Station (BTS). The aim of this research is to create a detection tool capable of detecting objects at a certain height below the line of sight (LoS) line of communication using the laser technology that has been developed. Topographic surveys and building planning are very important and required before building a BTS with an LOS. In this study, the Laser distance meter (rangefinder model) can measure the farthest distance up to 135 meters due to the limited area used. Experiments were applied to several objects to test the ability of the laser used and obtained the maximum distance of the TS832 transmission media reaching 70.7 meters.
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Xu, Yongfeng. "Photogrammetry-based structural damage detection by tracking a visible laser line". Structural Health Monitoring 19, n.º 1 (26 de abril de 2019): 322–36. http://dx.doi.org/10.1177/1475921719840354.

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Research works on photogrammetry have received tremendous attention in the past few decades. One advantage of photogrammetry is that it can measure displacement and deformation of a structure in a fully non-contact, full-field manner. As a non-destructive evaluation method, photogrammetry can be used to detect structural damage by identifying local anomalies in measured deformation of a structure. Numerous methods have been proposed to measure deformations by tracking exterior features of structures, assuming that the features can be consistently identified and tracked on sequences of digital images captured by cameras. Such feature-tracking methods can fail if the features do not exist on captured images. One feasible solution to the potential failure is to artificially add exterior features to structures. However, painting and mounting such features can introduce unwanted permanent surficial modifications, mass loads, and stiffness changes to structures. In this article, a photogrammetry-based structural damage detection method is developed, where a visible laser line is projected to a surface of a structure, serving as an exterior feature to be tracked; the projected laser line is massless and its existence is temporary. A laser-line-tracking technique is proposed to track the projected laser line on captured digital images. Modal parameters of a target line corresponding to the projected laser line can be estimated by conducting experimental modal analysis. By identifying anomalies in curvature mode shapes of the target line and mapping the anomalies to the projected laser line, structural damage can be detected with identified positions and sizes. An experimental investigation of the damage detection method was conducted on a damaged beam. Modal parameters of a target line corresponding to a projected laser line were estimated, which compared well with those from a finite element model of the damaged beam. Experimental damage detection results were validated by numerical ones from the finite element model.
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Shi Jun, 施军, 肖沙里 Xiao Shali, 徐道连 Xu Daolian, 钱家渝 Qian Jiayu y 王洪建 Wang Hongjian. "X-Ray Line Polarization Detection for Laser-Produced Plasmas". Acta Optica Sinica 31, s1 (2011): s100401. http://dx.doi.org/10.3788/aos201131.s100401.

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Tesis sobre el tema "Laser Line Detection"

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Vempati, Venkata Surya Raghuram. "Remote detection of hydrogen leak using Nd:YAG pulsed laser induced dual line detection Rayleigh light scattering". [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0008640.

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Kölhed, Malin. "Novel on-line mid infrared detection strategies in capillary electrophoretic systems". Doctoral thesis, Stockholm University, Department of Analytical Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-629.

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Infrared absorption spectra can provide analytically useful information on a large variety of compounds, ranging from small ions to large biological molecules. In fact, all analytes that possess a dipole moment that changes during vibration are infrared-active. The infrared (IR) spectrum can be subdivided into far-, mid- and near- regions. The focus of attention in this thesis is the mid-IR region, in which the fundamental vibrations of most organic compounds are located, thus providing scope for positive structural identification. However, while such near-ubiquitous signals can be very useful for monitoring simple molecules in simple systems, they can be increasingly disadvantageous as the number of analytes and/or the complexity of the sample matrix increases. Thus, hyphenation to a separation system prior to detection is desirable. Paper I appended to this thesis presents (for the first time) the on-line hyphenation between Fourier transform infrared spectroscopy, FTIR, and capillary zone electrophoresis, CZE. CZE is a highly efficient separation technique that separates ionic analytes with respect to their charge-to-size ratio. It is most commonly performed in aqueous buffers in fused silica capillaries. Since these capillaries absorb virtually all infrared light an IR-transparent flow cell had to be developed. In further studies (Paper II) the applicability of CZE is expanded to include neutral analytes by the addition of micelles to the buffer, and micellar electrokinetic chromatography, MEKC, was successfully hyphenated to FTIR for the first time. Paper III describes an application of the on-line CZE-FTIR technique in which non-UV-absorbing analytes in a complex matrix were separated, identified and quantified in one run.

Measuring aqueous solutions in the mid-IR region is not straightforward since water absorbs intensely in this region, sometimes completely, leaving no transmitted, detectable light. For this reason, quantum cascade lasers are interesting. These lasers represent a new type of mid-IR semiconducting lasers with high output power due to their ingenious design. The laser action lies within one conduction band (intersubband) and can be tailored to emit light in the entire mid-IR region using the same semiconducting material. To investigate their potential to increase the optical path length in aqueous solutions, these lasers were used with an aqueous flow system (Paper IV), and the experience gained in these experiments enabled hyphenation of such lasers to a CZE system (Paper V).

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Montes, Martin Alejandro. "Monte carlo simulations as a tool to optimize target detection by AUV/ROV laser line scanners". [Tampa, Fla.] : University of South Florida, 2005. http://purl.fcla.edu/fcla/etd/SFE0001295.

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Kiraz, Ercan. "An Automated Calibration Setup For Laser Beam Positioning Systems In Visual Inspection Applications". Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615445/index.pdf.

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In this study, a calibration setup for laser beam positioning systems used in visual inspection applications in industry is designed and manufactured. The laser positioning systems generate movable parallel laser lines on the projection surface. There are several translational and angular error sources affecting the positioning accuracy of the laser lines on the projection surface. Especially, since the laser line positioning error caused by angular error sources increases with the distance between the laser system and the projection surface, angular parameters of the laser sources should be measured and adjusted precisely. The calibration setup developed in this study detects the laser line positions at two different projection distances by means of laser sensing cameras which are positioned precisely along the laser lines and laser positioning axis which is perpendicular to these lines. Cameras detect the positions of the laser lines which are directed to the camera sensors with micrometer repeatability by means of some special imaging algorithms. The precise positioning of the cameras requires a special camera positioning system. For this reason, the disturbances like temperature changes and vibration should be minimized. In order to provide a suitable environment for the calibration system, special tests are conducted and a special calibration room is constituted. Construction inside the room is also made by considering the required ambient parameters. Finally, several verification tests of the calibration system are conducted.
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Colak, Seher. "Architecture générique pour le système de vision sur FPGA - Application à la détection de trait laser". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSES010.

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Cette thèse s’inscrit dans le cadre d’une convention industrielle de formation par la recherche (CIFRE) entre le laboratoire Hubert Curien et l’entreprise Pattyn Bakery Division. L’objectif de ces travaux est le développement d’un système de détection de trait laser sur FPGA (Field Programmable Gate Array) qui soit plus performant que système actuel de l’entreprise. Dans l’industrie, les concepteurs de systèmes de vision doivent pouvoir créer et modifier facilement leurs systèmes afin de pouvoir les adapter aux besoins de leurs clients et aux évolutions technologiques. Ainsi les opérateurs développés doivent être génériques afin de permettre aux concepteurs de modifier le système de vision sans nécessairement avoir de compétences matérielles. Les concepteurs doivent également pouvoir être en mesure d’estimer quelles seront les ressources utilisées par l’opérateur en cas modifications du système : paramètres de l’application, capteur, famille de FPGA... Dans ce manuscrit, les principaux algorithmes de détection de trait laser ainsi que leurs propriétés ont été étudiés. Un opérateur de détection de trait laser a été choisi et développé. L’implantation de cet opérateur sur une caméra-FPGA du marché a permis d’obtenir un premier prototype fonctionnel. Les performances temporelles de ce nouveau système sont quatre fois supérieures à celles du système actuellement utilisé par l’entreprise. Le nouveau système est capable de traiter jusqu’à 2500 images par seconde. Enfin, les modèles de la consommation des ressources permettent de dimensionner une architecture à partir d’un ensemble de paramètres prédéfinis de manière rapide et sans faire de synthèses. Le paramètre auquel les concepteurs doivent prêter le plus d’attention est le niveau de parallélisme des données. Ce paramètre permet d’exploiter les capacités de parallélisme du FPGA en consommant plus de ressources. Cependant, les ressources du FPGA sont limitées et augmenter le niveau de parallélisme peut induire la nécessité de changer de FPGA. Le système et les données fournies permettront à l’entreprise d’adapter le système de vision selon les besoins futurs des clients en les guidant vers le choix du matériel
This thesis is part of an industrial research training agreement (CIFRE) between the Hubert Curien laboratory and the company Pattyn Bakery Division. The goal of this work is the development of an FPGA laser line detection system that is more efficient than the current system of the company. In the industry, vision system designers need to be able to easily create and modify their systems in order to adapt them to their customers’ needs and technological developments. Thus developed operators must be generic to allow designers to change the vision system without necessarily having material skills. Designers must also be able to estimate what resources will be used by the operator in case of system changes : application parameters, sensor, family of FPGAs ... In this manuscript, the main laser line detection algorithms and their properties have been studied. A laser line detection operator was chosen and developed. The implementation of this operator on an FPGA-camera from market has resulted in a first functional prototype. The time performance of this new system is four times that of the system currently used by the company. The new system is able to process up to 2500 frames per second. Finally, resource consumption models makes it possible to size an architecture from a set of predefined parameters quickly and without synthesizing. The parameter to which designers must pay the most attention is the level of parallelism of the data. This parameter makes it possible to exploit the parallelism capabilities of the FPGA by consuming more resources. However, the resources of the FPGA are limited and increasing the level of parallelism can induce the need to change the family of FPGAs. The system and the data provided will enable the company to adapt the vision system to the future needs of customers by guiding the choice of equipment
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Jing, Hansong. "Laser range imaging for on-line mapping of 3D images to pseudo-X-ray images for poultry bone fragment detection". College Park, Md. : University of Maryland, 2003. http://hdl.handle.net/1903/97.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2003.
Thesis research directed by: Biological Resources Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Bach, Mathias [Verfasser] y W. [Akademischer Betreuer] Heering. "Near Infrared Laser Sensor System for In-Line Detection of Conversion in UV-Cured Polymer Coatings / Mathias Bach ; Betreuer: W. Heering". Karlsruhe : KIT Scientific Publishing, 2012. http://d-nb.info/1184493200/34.

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Sudirman, Azizahalhakim. "Increased Functionality of Optical Fibers for Life-Science Applications". Doctoral thesis, KTH, Kvantelektronik och -optik, QEO, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145319.

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The objective of this thesis work is to increase the functionality of optical fibers for possible applications in life-sciences. Optical fibers are a promising technology for use in biology and medicine. They are low-costwaveguides, flexible and have a small cross-section. They can guide high-power light with low loss in a micrometer core-size. These features make fibers attractive for minimally-invasive,in-vivostudies. The backwards guidance of the optical signal allows for real-time monitoring of the distance to the scattering targets and to study the environment through Raman scattering and fluorescence excitation. The longitudinal holes introduced in the fibers can be used,for instance,for delivery of medicine to a specific regionof a body. They could even be used for the extractionof species considered interesting for further analysis, for example, studyingcells that may be cancer-related. This thesis deals with four main topics. First, a demonstration is presented of the combination of high-power light guidance for ablation, low-power light reflectometry for positioning, and for liquid retrieval in a single fiber. It was found that in order to exploit the microfluidic possibilities available in optical fibers with holes, one needs to be able to combine fluids and light in a fiber without hindering the low-loss light guidance and the fluid flow. Secondly, one should also be able to couple light into the liquids and backout again. This is the subject of another paper in the present thesis. It was also observed that laser excitation through a fiber for the collection of a low-intensity fluorescence signal was often affected by the luminescence noise createdby the primary-coating of the fiber. This problem makes it difficult to measure low light-levels, for example, from single-cells. Athirdpaper in this thesis then describes a novel approach to reduce the luminescence from the polymer coating of the fiber, with the use of a nanometer-thick carbon layer on the cladding surface. Finally, exploiting some of the results described earlier, an optical fiber with longitudinal holes is used for the excitation, identification and for the collection of particles considered being of interest. The excitation light is guided in the fiber, the identification is performed by choosing the fluorescent particles with the appropriate wavelength, and, when a particle of interest is sufficiently near the fiber-tip, the suction system is activated for collection of the particle with good specificity. It is believed that the work described in this thesis could open the doors for applications in life-sciences and the future use of optical fibers for in-vivo studies.

QC 20140516

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Hosu, Ioana Silvia. "Ultrasensitive detection of ricin-like proteins by innovative graphene-based sensors, using mass spectrometry". Thesis, Lille 1, 2020. http://www.theses.fr/2020LIL1I008.

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Les attaques bioterroristes sont devenues plus fréquentes ces dernières années et le large éventail d’agents bioterroristes en fait un problème important à résoudre. La ricine appartient à la famille des protéines inactivant les ribosomes (RIP). Les RIP sont des toxines biologiques, solubles dans l’eau, qui peuvent être facilement extraites de plantes (ricine de Ricinus communis et abrine d’Abrus precatorius) ou de bactéries (toxine de Shiga). La ricine est composée de deux chaînes: la chaîne A de la ricine, une N-glycosidase induisant la toxicité par élimination de l’adénine (action de dépurination) de l’ARNr 28S des sous-unités ribosomales 60S, inhibant la synthèse protéique, et la chaîne B, une lectine qui se lie aux fragments de sucre spécifiques sur la membrane extracellulaire, assurant l'absorption de la toxine. Comme ils inhibent la synthèse des protéines, en fonction de la voie d'absorption et de la dose reçue, la mort peut survenir. En l'absence de contre-mesures efficaces, les méthodes de détection de ces toxines doivent être rapides, fiables, sélectives et sans aucune ambiguïté. Les méthodes actuelles qui sont principalement basées sur des méthodes comme le SERS, l’ELISA, la Colorimétrie et la SPR ne répondent pas à toutes ces exigences. Même si la spectrométrie de masse a été utilisée pour la détection de la ricine, elle ne peut pas être réalisée sans une longue et fastidieuse préparation d'échantillon. Dans ce travail, nous avons montré comment les matériaux à base de carbone (nanomurs de carbone) pourraient être appliqués comme matériaux nanostructurés pour la détection spécifique, rapide et simple de la ricine par désorption/ionisation laser de surface pour la détection par spectrométrie de masse (SALDI-MS). Tout d'abord, l'adéquation des nanoparticules de carbone en tant que bonne surface SALDI a été initialement étudiée pour des biomolécules plus petites. En ce qui concerne les protéines, la littérature a montré qu'elles sont difficiles à ioniser et à détecter avec la méthode SALD-MS, en raison de leur grand poids moléculaire. La capacité des CNWs à désorber et à ioniser les protéines a nécessité de nombreuses étapes d’optimisation. Pour ce faire, le cytochrome C a été utilisé comme protéine modèle. Enfin, des nanomurs de carbone alignés verticalement ont ensuite été modifiés à l'aide de sucres à lectine spécifiques (galactosamine), pour la détection spécifique de la chaîne B de la ricine dans des échantillons réels, tels que des boissons sans alcool et du sérum sanguin. Nous avons obtenu une limite de détection (80 ng/0.5 μL) soit trois fois inférieure à la dose létale médiane la plus faible (DL50 = 10 μg/kg). Cette détection peut être réalisée dans les 10 min. Dans la dernière partie, des résultats préliminaires concernant la mise au point d'outils analytiques bimodaux seront présentés. Il s'agit de combinaisons telles que: SPR (résonance plasmonique de surface)-MS, SERS (Spectroscopie Raman Exaltée de Surface)-MS et EC(Électrochimie)-MS. Une attention particulière a été portée sur la SPR-MS car elle permet d’obtenir des interactions quantitatives et moléculaires en temps réel (SPR) et une identification structurelle des analytes (MS). Les méthodes de dépôt suivantes (de matériaux de type graphène) sont avérées appropriées pour la détection des protéines: la méthode de surfactant à bulle d'oxyde de graphène, le transfert par voie humide de graphène CVD et le dépôt électrophorétique de graphène.Cette thèse décrit pour la première fois le développement d'un capteur de type SALDI-MS, capable de détecter la ricine à une dose inférieure à la dose mortelle chez l'homme et d'apporter ainsi une contribution importante à la lutte contre d'éventuelles attaques terroristes. L'étude systématique de différents paramètres qui influencent ce processus LDI-MS est également présenté. Les techniques bimodales présentent des alternatives intéressantes permettant de créer des outils analytiques plus puissants
Bio-terroristic attacks have become more frequent in the past years and the wide range of bio-terroristic agents makes this an important issue to overcome. Ricin is part of the ribosome-inactivating proteins (RIP). RIPs are vegetable toxins, water soluble, which can be easily extracted from plants (ricin from castor beams, abrin from rosary pea) or from bacteria (Shiga toxin). These proteins are composed of two chains: ricin A chain, a glycosidase that insures the toxicity by removal of adenine (depurination) from the RNAr 28S from the 60S ribosomal subunits, followed by the inhibition of protein synthesis, and ricin B chain, a lectin that binds to specific sugar moieties on the surface of the cells, assuring transportation the cell uptake. As they inhibit protein synthesis, depending of the administration take-up (oral, inhalation, intravenously) and the dose received, cell death also occurs. In the absence of efficient counter measurements, detection methods of these toxins have to be fast, reliable, selective and suitable, especially pre-assimilation analysis. The current methods (based on SERS, ELISA, Colorimetric, SPR and MS) do not overcome all these requirements. Even though mass spectrometry was used for ricin detection, it cannot be performed without long and tedious sample preparation. In this work, we describe how carbon-based materials (carbon nanowalls and others) can be used as nanostructured materials for specific, rapid and straightforward ricin-like proteins detection, using surface assisted laser/desorption ionization mass spectrometry (SALDI-MS). The suitability of the carbon nanowalls (CNWS) was proven initially for other smaller bio-molecules.When it comes to proteins, they are hard to ionize and detect using SALD-MS, due in part to their big molecular weight. The ability of CNWs to desorb and ionize proteins required a lot of optimization steps of the SALDI-MS method. A systematic optimization was done using a model protein, the cytochrome C. From this, we were able, for the first time, to detect Ricin B chain without the use of organic matrix. To go further in improving Ricin detection performances, carbon nanowalls were then covalently modified using specific lectin sugars (galactosamine) and the ability to detect Ricin B chain in real samples such as soft drinks and blood serum was demonstrated within10 minutes. We obtained a limit of detection (80 ng/0.5 μL) that is 3 times lower than the lowest median lethal dose (LD50 = 10 μg/kg) Multifunctional surfaces are described as perspectives for more powerful bimodal analytical tools, by combining two techniques, such as: SPR(Surface Plasmon Resonance)/SALDI-MS, SERS(Surface Enhanced Raman Spectroscopy)/SALDI-MS and EC(Electrochemistry)/SALDI-MS. Special attention was focused on SPR/SALDI-MS as it can achieve both quantitative and molecular interactions in real-time (SPR) and precise identification of the analytes (MS). Different depositions methods of graphene-like materials were studied to ensure a good surface coverage of the substrate and the followings methods were suitable for protein detection: bubble surfactant method of graphene oxide, wet transfer of CVD pristine graphene, electrophoretic deposition of graphene.In this thesis, we described the first world wide ricin-like proteins SALDI-MS sensor, which is able to detect below the lethal dose in humans and bring an important contribution to the fight against eventual terroristic attacks. The systematic study of different parameters that influence this LDI-MS process is also presented. The dual surfaces studied, in particular the SPR/MS bimodal techniques, presented reliable consistency for further approaches in creating more powerful analytical tools
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Shao, Hang. "A Fast MLP-based Learning Method and its Application to Mine Countermeasure Missions". Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23512.

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In this research, a novel machine learning method is designed and applied to Mine Countermeasure Missions. Similarly to some kernel methods, the proposed approach seeks to compute a linear model from another higher dimensional feature space. However, no kernel is used and the feature mapping is explicit. Computation can be done directly in the accessible feature space. In the proposed approach, the feature projection is implemented by constructing a large hidden layer, which differs from traditional belief that Multi-Layer Perceptron is usually funnel-shaped and the hidden layer is used as feature extractor. The proposed approach is a general method that can be applied to various problems. It is able to improve the performance of the neural network based methods and the learning speed of support vector machine. The classification speed of the proposed approach is also faster than that of kernel machines on the mine countermeasure mission task.
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Libros sobre el tema "Laser Line Detection"

1

Huang, Hai. The development and evaluation of the laser line object detection system for powered wheelchairs. 2005.

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2

Thomas, Michael E. Optical Propagation in Linear Media. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780195091618.001.0001.

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A typical optical system is composed of three basic components: a source, a detector, and a medium in which the optical energy propagates. Many textbooks cover sources and detectors, but very few cover propagation in a comprehensive way, incorporating the latest progress in theory and experiment concerning the propagating medium. This book fulfills that need. It is the first comprehensive and self-contained book on this topic. It is useful reference book for researchers, and a textbook for courses like Laser Light Propagation, Solid State Optics, and Optical Propagation in the Atmosphere.
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Cavender, Gray y Nancy C. Jurik. Introduction. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252037191.003.0001.

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This introductory chapter begins with a background on the television series Prime Suspect, which chronicles the life and career of Jane Tennison (Helen Mirren), a detective chief inspector and later a detective superintendent for the London Metropolitan Police. Beyond its worldwide popularity, Prime Suspect is a pathbreaking series because it centers a strong woman lead in a gritty portrayal within what had been an otherwise overwhelmingly male-dominated police procedural subgenre. The series has shaped also the police procedural subgenre by setting higher standards for conveying a sense of social realism in the coverage of police work and, more specifically, what media analysts call “forensic realism.” The remainder of the chapter presents a brief history of the crime genre and women's place as well as a brief history of how television has portrayed women more generally. It concludes with an overview of the subsequent chapters is also presented.
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Collins, Wilkie. The Law and the Lady. Editado por Jenny Bourne Taylor. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199538164.001.0001.

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Valeria Woodville’s first act as a married woman is to sign her name in the marriage register incorrectly, and this slip is followed by the gradual disclosure of a series of secrets about her husband’s earlier life, each of which leads on to another set of questions and enigmas. Her discoveries prompt her to defy her husband’s authority, to take the law into into a labyrinthine maze of false clues and deceptive identities, in which the exploration of the tangled workings of the mind becomes linked to an investigation into the masquerades of femininity. Probably the first full-length novel with a woman detective as its heroine, The Law and the Lady is a fascinating example of Collins’s later fiction. First published in 1875, it employs many of the techniques used in The Moonstone, developing them in bizarre and unexpected ways, and in its Gothic and fantastic elements The Law and the Lady adds a significant dimension to the history of detective fiction.
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Capítulos de libros sobre el tema "Laser Line Detection"

1

Xu, Y. F. "Photogrammetry-Based Structural Damage Detection by Tracking a Laser Line". En Rotating Machinery, Optical Methods & Scanning LDV Methods, Volume 6, 87–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47721-9_10.

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Wang, Xiaozhen, Haikuan Wang, Aolei Yang, Minrui Fei y Chunfeng Shen. "Detection Method of Laser Level Line Based on Machine Vision". En Communications in Computer and Information Science, 481–90. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6370-1_48.

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Tsai, Yichang, Chenglong Jiang y Zhaohua Wang. "Pavement Crack Detection Using High-Resolution 3D Line Laser Imaging Technology". En 7th RILEM International Conference on Cracking in Pavements, 169–78. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4566-7_17.

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Lendl, B., M. Kölhed, P. Hinsmann, M. Haberkorn, P. Svasek y B. Karlberg. "On-Line Mid-IR (Quantum Cascade Laser and FTIR Spectrometric) Detection in Capillary Based Separation Systems". En Micro Total Analysis Systems 2002, 599–601. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0295-0_200.

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Yan, Gang, Chen Yin Ni, Yi Fei Shi, Zhong Hua Shen, Jian Lu y Xiao Wu Ni. "Experimental Study on the Detection of Surface-Breaking Defects on Metal with the Scanning Laser Line Source Technique". En Optics Design and Precision Manufacturing Technologies, 1117–22. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-458-8.1117.

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Malinowski, Paweł H., Tomasz Wandowski, Wiesław M. Ostachowicz, Maxime Sagnard, Laurent Berthe, Romain Ecault, Igor Solodov, Damien Segur y Marc Kreutzbruck. "Extended Non-destructive Testing for the Bondline Quality Assessment of Aircraft Composite Structures". En Adhesive Bonding of Aircraft Composite Structures, 223–57. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-92810-4_4.

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AbstractWe present the results of extended non-destructive testing (ENDT) methods for bond line quality assessment in adhesive joints. The results presented were derived for important application scenarios with regards to aircraft manufacturing and the in-service repair of composite structures. The electromechanical impedance (EMI), laser shock adhesion testing (LASAT), and nonlinear ultrasound scanning (NUS) were used on flat coupon samples, scarfed samples, and curved samples. The EMI method applied to the flat coupons showed some relation of the frequency shift to the level of contamination. For the curved samples, there was insufficient sensitivity to differentiate distinct levels of contamination, while for scarfed samples in most cases both detection and distinction were possible. The LASAT method gave good results for the coupon samples, which were also in accordance with the results of the $${\text{G}}_{\text{IC}}$$ G IC and $${\text{G}}_{\text{IIC}}$$ G IIC tests. For coupon samples with multiple contaminations, we obtained results with varying significance. In the case of NUS, the measurements revealed an increase in nonlinearity affected by contamination at the interphase between the CFRP adherend and the adhesive layer for the majority of scenarios comprising single contamination of flat coupons and scarfed samples. The effect of multiple contaminations was a decrease in nonlinearity for the curved samples.
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Kühnemann, Frank. "Photoacoustic Trace Gas Detection in Plant Biology". En Laser in Environmental and Life Sciences, 313–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08255-3_16.

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Minty, Michiko G. y Frank Zimmermann. "Cooling". En Particle Acceleration and Detection, 263–300. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-08581-3_11.

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AbstractMany applications of particle accelerators require beam cooling, which refers to a reduction of the beam phase space volume or an increase in the beam density via dissipative forces. In electron and positron storage rings cooling naturally occurs due to synchrotron radiation, and special synchrotron-radiation damping rings for the production of low-emittance beams are an integral part of electron-positron linear colliders. For other types of particles different cooling techniques are available. Electron cooling and stochastic cooling of hadron beams are used to accumulate beams of rare particles (such as antiprotons), to combat emittance growth (e.g., due to scattering on an internal target), or to produce beams of high quality for certain experiments. Laser cooling is employed to cool ion beams down to extremely small temperatures. Here the laser is used to induce transitions between the ion electronic states and the cooling exploits the Dopper frequency shift. Electron beams of unprecedentedly small emittance may be obtained by a different type of laser cooling, where the laser beam acts like a wiggler magnet. Finally, designs of a future muon collider rely on the principle of ionization cooling. Reference [1] gives a brief review of the principal ideas and the history of beam cooling in storage rings; a theoretical dicussion and a few practical examples can be found in [2].
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9

Urban, Wolfgang. "Detection of Nitric Oxide in Human Exhalation Using Laser Magnetic Resonance". En Laser in Environmental and Life Sciences, 269–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08255-3_13.

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Dahnke, Hannes, Sandra Stry y Golo von Basum. "Medical Trace Gas Detection by Means of Mid-Infrared Cavity Leak-Out Spectroscopy". En Laser in Environmental and Life Sciences, 283–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08255-3_14.

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Actas de conferencias sobre el tema "Laser Line Detection"

1

Lu, Feng, Giorgio Di Natale, Marie-Lise Flottes y Bruno Rouzeyre. "Customized cell detector for laser-induced-fault detection". En 2014 IEEE 20th International On-Line Testing Symposium (IOLTS). IEEE, 2014. http://dx.doi.org/10.1109/iolts.2014.6873669.

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Douti, Dam-Bé L., Sherazade Aknoun, Serge Monneret, Christophe Hecquet, Mireille Commandré y Laurent Gallais. "In-line quantitative phase imaging for damage detection and analysis". En SPIE Laser Damage, editado por Gregory J. Exarhos, Vitaly E. Gruzdev, Joseph A. Menapace, Detlev Ristau y MJ Soileau. SPIE, 2014. http://dx.doi.org/10.1117/12.2068178.

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Grupp, Frank U., Liang Wang, Hanna Kellermann, Ralf Bender y Ulrich Hopp. "Line profile analysis of the laser frequency comb in FOCES". En Techniques and Instrumentation for Detection of Exoplanets VIII, editado por Stuart Shaklan. SPIE, 2017. http://dx.doi.org/10.1117/12.2273706.

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Zhang, Changsai, Zhengjun Liu, Shuwen Yang y Bo Xu. "Key technologies of laser point cloud data processing in power line corridor". En LIDAR Imaging Detection and Target Recognition 2017, editado por Yueguang Lv, Jianzhong Su, Wei Gong, Jian Yang, Weimin Bao, Weibiao Chen, Zelin Shi, Jindong Fei, Shensheng Han y Weiqi Jin. SPIE, 2017. http://dx.doi.org/10.1117/12.2295174.

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Yun, Luo, Liao Ruoyu, shi yi, zhao pengfei, yang xainheng, wu sixin, zou dongyang et al. "4.05kW monolithic narrow line-width near diffraction-limited fiber laser". En Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, editado por Junhao Chu, Qifeng Yu, Huilin Jiang y Junhong Su. SPIE, 2021. http://dx.doi.org/10.1117/12.2586284.

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Guo, Ze-rong y Guang-wei Zhou. "Technique of laser in-line ignition all electronic safe and arming device". En International Symposium on Photoelectronic Detection and Imaging 2009, editado por Farzin Amzajerdian, Chun-qing Gao y Tian-yu Xie. SPIE, 2009. http://dx.doi.org/10.1117/12.835663.

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Tian, Hui, Jin-ping Ni, Qian Lu y Hong-Wei Lu. "Design on the optical screen target by using the line structured light laser". En International Symposium on Photoelectronic Detection and Imaging 2011. SPIE, 2011. http://dx.doi.org/10.1117/12.897336.

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Matsushita, Akihiko, Takafumi Morishita, Shun’ichi Kaneko, Hitoshi Ohfuji y Kaoru Fukuda. "Image Detection of Seam Line for Laser Welding Robot". En 4th Asia International Symposium on Mechatronics. Singapore: Research Publishing Services, 2010. http://dx.doi.org/10.3850/978-981-08-7723-1_p149.

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Richman, Bruce, Chris W. Rella y Sze Tan. "Multi-species gas detection and precise line area measurements using CRDS and a high-precision wavemeter". En Laser Science. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/ls.2007.lwa4.

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Wang, Zi-nan, Cui-yun Wang, Da-liang Wang, Ping Lu, Xiao-qi Yu, Lian-yu Xu, Yi Yang, Yun Jiang, Li-xin Zhu y Zheng-bin Li. "Line-width compression of the distributed feedback laser with an external parallel feedback cavity". En International Symposium on Photoelectronic Detection and Imaging 2011. SPIE, 2011. http://dx.doi.org/10.1117/12.900983.

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Informes sobre el tema "Laser Line Detection"

1

Montavont, N., E. Njedjou y S. Veerepalli. Link-Layer Event Notifications for Detecting Network Attachments. Editado por S. Krishnan y A. Yegin. RFC Editor, agosto de 2007. http://dx.doi.org/10.17487/rfc4957.

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Sullivan, T. E. y P. H. Cutler. Laser Interactions in STM and STM-Like Devices: Applications to Infrared and Optical Detection. Fort Belvoir, VA: Defense Technical Information Center, abril de 1995. http://dx.doi.org/10.21236/ada299797.

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Fleischaker, Nathan A. Wireless Network Design Optimized for Military Operations in Degraded Littoral Environments Using Link Layer Error Detection Mechanisms. Fort Belvoir, VA: Defense Technical Information Center, mayo de 2003. http://dx.doi.org/10.21236/ada416298.

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