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Статті в журналах з теми "OPTIM –TOOL"
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Astorino, Annabella, Massimo Di Francesco, Manlio Gaudioso, Enrico Gorgone, and Benedetto Manca. "Polyhedral separation via difference of convex (DC) programming." Soft Computing 25, no. 19 (April 7, 2021): 12605–13. http://dx.doi.org/10.1007/s00500-021-05758-6.
Повний текст джерелаАнотація:
AbstractWe consider polyhedral separation of sets as a possible tool in supervised classification. In particular, we focus on the optimization model introduced by Astorino and Gaudioso (J Optim Theory Appl 112(2):265–293, 2002) and adopt its reformulation in difference of convex (DC) form. We tackle the problem by adapting the algorithm for DC programming known as DCA. We present the results of the implementation of DCA on a number of benchmark classification datasets.
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Heidarkhani, Shapour, and Ghasem Alizadeh Afrouzi. "SOME MULTIPLICITY RESULTS TO THE EXISTENCE OF THREE SOLUTIONS FOR A DIRICHLET BOUNDARY VALUE PROBLEM INVOLVING THE P-LAPLACIAN." Mathematical Modelling and Analysis 16, no. 3 (August 24, 2011): 390–400. http://dx.doi.org/10.3846/13926292.2011.601770.
Повний текст джерелаАнотація:
In this paper we prove the existence of two intervals of positive real parameters λ for a Dirichlet boundary value problem involving the p-Laplacian which admit three weak solutions, whose norms are uniformly bounded with respect to λ belonging to one of the two intervals. Our main tool is a three critical points theorem due to G. Bonanno [A critical points theorem and nonlinear differential problems, J. Global Optim., 28:249–258, 2004].
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Atlihan, Ö. G., T. Yurdakadim, and E. Taş. "A new approach to the approximation by positive linear operators in weighted spaces." Ukrains’kyi Matematychnyi Zhurnal 74, no. 11 (December 26, 2022): 1447–53. http://dx.doi.org/10.37863/umzh.v74i11.6427.
Повний текст джерелаАнотація:
UDC 517.5 In the present paper, we deal with the problem of approximating a function by positive linear operators in weighted spaces. In this case, our main tool is the P p -statistical convergence recently defined by [M. Ünver, C. Orhan, Numer. Funct. Anal. and Optim., <strong>40</strong>, 535–547 (2019)]. It is worth noting that the P p -statistical convergence and the statistical convergence do not imply each other.
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Kutuniva, Kari, Jussi A. Karjalainen, and Kari Mäntyjärvi. "Effect of Convex Sheared Punch Geometry on Cutting Force of Ultra-High-Strength Steel." Key Engineering Materials 504-506 (February 2012): 1359–64. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.1359.
Повний текст джерелаАнотація:
Extremely high strength of the ultra-high-strength steels leads to increased load factors on the tooling machines and punching tools. This experimental study examines how much convex punch geometry affects cutting forces when punching ultra-high-strength steels. Tools used in punching tests were four different convex sheared rooftop punches and one conventional flat end punch, to which rooftop punches were compared to. The material in punching tests was ultra-high-strength steel Ruukki Optim 960 QC, with a thickness of 4 mm. The test material in punching tests was sheared with rooftop punches and a flat end punch and occurred cutting forces were measured. The qualities of punched holes were evaluated visually and the roundness measurements were also performed. The results show that the cutting forces of Optim 960 QC can be reduced radically with optimal convex punch geometry. With using 14-degree shear angle of the punch end, the cutting forces reduced up to 57 % compared to forces of the conventional flat end tool. However, largest tested shear angles caused several negative effects on the cutting quality of the holes and therefore they are not suitable in all applications. Punching tests proved that the cutting clearance had no appreciable effect on cutting forces when punching ultra-high-strength steel. Instead there was a noticeable effect on the quality of the punched hole, especially when large shear angles were used.
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Kesti, Vili, A. Kaijalainen, A. Väisänen, A. Järvenpää, A. Määttä, A. M. Arola, K. Mäntyjärvi, and R. Ruoppa. "Bendability and Microstructure of Direct Quenched Optim® 960QC." Materials Science Forum 783-786 (May 2014): 818–24. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.818.
Повний текст джерелаАнотація:
Use of ultra-high-strength steels (UHSS) in weight critical constructions is an effective way to save energy and minimize carbon footprint in the end use. On the other hand, the demands for reducing manufacturing costs and energy consumption of the steelmaker are increasing. This has led to development of energy efficient direct quenching (DQ) steelmaking process as an alternative to the conventional quenched and tempered or thermomechanical rolling and accelerate cooled processes. Ruukki has employed thermomechanical rolling and direct quenching process (TM + DQ) for a novel type of ultra-high-strength strip and plate steels since 2001. Advantages of the ultra-high-strength level (>900MPa) can be fully utilized only if fabricated properties are on a sufficient level. Bending is one of the most important workshop processes and a good bendability is essential for a structural steel. Hence, the metallurgy and bendability of Ruukki ́s TM + DQ strip steel Optim® 960QC have been investigated closely. It was found that by optimizing process parameters and chemical composition, a good combination of strength and ductility can be achieved by a modification of martensitic-bainitic microstructure. Despite of smaller total elongation, the bendability of Optim® 960QC is at least on the same level as on conventionally manufactured 960MPa steels. However, it is important to pay special attention to bending process (tool parameters, springback, bending force, material handling) when bending UHSS. It was also found that the bendability of Optim® 960QC can be significantly enhanced by local laser heat treatments or roll forming.
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Laitinen, Risto O., David A. Porter, L. Pentti Karjalainen, Pasi Leiviskä, and Jukka Kömi. "Physical Simulation for Evaluating Heat-Affected Zone Toughness of High and Ultra-High Strength Steels." Materials Science Forum 762 (July 2013): 711–16. http://dx.doi.org/10.4028/www.scientific.net/msf.762.711.
Повний текст джерелаАнотація:
Physical simulation of the most critical sub-zones of the heat-affected zone is a useful tool for the evaluation of the toughness of welded joints in high-strength and ultra-high-strength steels. In two high-strength offshore steels with the yield strength of 500 MPa, the coarse grained, intercritical and intercritically reheated coarse grained zones were simulated using the cooling times from 800 to 500 °C (t8/5) 5 s and 30 s. Impact and CTOD tests as well as microstructural investigations were carried out in order to evaluate the weldability of the steels without the need for expensive welding tests. The test results showed that the intercritically reheated coarse grained zone with the longer cooling time t8/5=30 s was the most critical sub-zone in the HAZ due to the M-A constituents and coarse ferritic-bainitic microstructure. In 6 mm thick ultra-high-strength steel Optim 960 QC, the coarse grained and intercritically reheated coarse grained zones were simulated using the cooling times t8/5 of 5, 10, 15 and 20s and the intercritical zone using the cooling times t8/5 of 5 and 10 s in order to select the suitable heat input for welding. The impact test results from the simulated zones fulfilled the impact energy requirement of 14 J (5x10 mm specimen) at -40 °C for the cooling times, t8/5, from 5 to 15 s, which correspond to the heat input range 0.4-0.7 kJ/mm (for a 6 mm thickness).
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Kampai, Genta, and Harmadi Harmadi. "Rancang Bangun Alat Pendeteksi Kelebihan Beban Kendaraan Menggunakan Sensor Serat Optik dan Transceiver nRF24L01+." Jurnal Fisika Unand 9, no. 1 (February 11, 2020): 1–8. http://dx.doi.org/10.25077/jfu.9.1.1-8.2020.
Повний текст джерелаАнотація:
Telah dirancang alat pendeteksi kelebihan beban kendaraan menggunakan sensor serat optik dengan metode intrinsik. Rancang bangun alat pendeteksi kelebihan beban kendaraan ini terdiri dari sumber cahaya berupa dioda laser, serat optik FD-620-10, fotodetektor OPT 101, mikrokontroler Arduino Uno sebagai pengelolah data, buzzer, dan LCD sebagai penampil hasil pengukuran. Sensor serat optik digunakan untuk mengukur beban pada kendaraan dengan memanfaatkan perubahan tegangan keluaran dari OPT101 dan di transmisikan menggunakan Transceiver nRF24L01+. Karakterisasi sensor serat optik dilakukan dengan memvariasikan bending dalam bentuk banyaknya jumlah gerigi terhadap besarnya tegangan keluaran pada sensor serat optik. Hasil yang optimum diperoleh pada jumlah 5 gerigi dengan tegangan keluran sebesar 1,121 V. Kelebihan beban kendaraan maksimum yang dideteksi oleh sensor sebesar 6400 kg dengan tegangan keluaran sebesar 0,215 V. Jarak maksimum pengiriman data oleh Transceiver nRF24L01+ adalah 450 m tanpa penghalang dan 230 m dengan penghalang. Hasil pengukuran kelebihan beban kendaraan yang diperoleh dengan alat yang dirancang dibandingkan dengan jembatan timbang diperoleh kesalahan rata-rata sebesar 9,2 %. It has been designed an overloaded vehicle detection tool using optical fibre sensor with intrinsic method. The design of the vehicle's overload detection tool consists of laser diode as a light source, an optical fiber FD-620-10, a photodetector OPT 101, an Arduino Uno microcontroller as a data processor, a buzzer, and an LCD as a measuring result viewer. The fiber optic sensor is used to measure the load on the vehicle by utilizing the output voltage changes from OPT101 and cast using the Transceiver nRF24L01. The characterization of the fibre optic sensor is performed by varying bending in the form of a large amount of cleats to the magnitude of the output voltage in the fibre optic sensor. Optimum results are obtained at the number of 5 wells with a tension voltage is 1.121 V. The overload of maximum vehicle detected by the sensor is amounted to 6400 kg and a sensor output voltage is 0.215 V. The maximum distance from the data transmission Transceiver nRF24L01 + is 450 m without barrier and 230 m with barrier. The result of overload vehicle measurements obtained with designed tool is compared detection to weighbridge were obtained an average fault of 9.2%.
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., Widodo, and Nur Hidayat. "Design And Development Of Automatic Fiber Optic Cable Roller Using Nodemcu Esp 8266 Module." BEST : Journal of Applied Electrical, Science, & Technology 4, no. 1 (March 22, 2022): 27–32. http://dx.doi.org/10.36456/best.vol4.no1.5442.
Повний текст джерелаАнотація:
ABSTRACT The process of winding fiber optic cable rolls takes a long time because it is done manually or conventionally. One of the tools in winding is a FO cable roller. This tool is designed to be able to roll fiber optic cables, but the limitations of this tool are still done manually, FO cables are rolled by hand like pedaling a bicycle on the pedals, the speed is set based on the speed of the rotation of the hand and it all depends on the human factor. Therefore, there is a need for an Automatic Fiber Optic Cable Winder Using NodeMCU ESP8266 and using Iot (Web of Things) to be more efficient and better in cable winding expositions.
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Harvey, Bill. "Digital tools: Dispensing with reality." Optician 2016, no. 3 (March 2016): 139773–1. http://dx.doi.org/10.12968/opti.2016.3.139773.
Повний текст джерелаАнотація:
Bill Harvey fathoms out the new Nautilus virtual reality dispensing aid from Essilor, finding it to be a pioneering, easy-to-use tool enabling patients to decide on the best lenses for their lifestyles.
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Zhang, Yuan Liang, Zhi Min Zhou, and Xu Zhang. "Compensation Control of Cutting Tool Position in Machining Non-Axisymmetric Optic Mirror Surface." Materials Science Forum 505-507 (January 2006): 181–86. http://dx.doi.org/10.4028/www.scientific.net/msf.505-507.181.
Повний текст джерелаАнотація:
Piezoelectric servo mechanism, with its existing nonlinear response and hysteresis, restricts the precision greatly when applied to manufacturing of non-axisymmetric optic mirror. On the basis of theory analysis and experiments, this paper builds three kinds of feed-forward model of piezoelectric servo cutting system. According to these mathematical models, we make the compensation control to the cutting tool position, which results the maximum displacement error less than 0.04μm. And based on this method, experiments on machining non-axisymmetric optic surface of wave front corrector shows the Zernike relative error is less than 10%. So the compensation control of feed-forward control model of cutting tools position can efficiently counteract the influence of nonlinear response and hysteresis, which improves machining precision of non-axisymmetric optic mirror surface.
Дисертації з теми "OPTIM –TOOL"
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Lu, Cheng-Kai. "Retinal imaging tool for assessment of the parapapillary atrophy and the optic disc." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/9903.
Повний текст джерелаАнотація:
Ophthalmic diseases such as glaucoma are associated with progressive changes in the structure of the optic disc (OD) and parapapillary atrophy (PPA). These structural changes may therefore have relevance to other systemic diseases. The size and location of OD and PPA can be used as registration landmarks for monitoring changes in features of the fundus of the eye. Retinal vessel evaluation, for example, can be used as a biomarker for the effects of multiple systemic diseases, or co-morbidities. This thesis presents the first computer-aided measuring tool that detects and quantifies the progression of PPA automatically on a 2D retinal fundus image in the presence of image noise. An automated segmentation system is described that can detect features of the optic nerve. Three novel approaches are explored that extract the PPA and OD region approximately from a 2D fundus image. The OD region is segmented using (i) a combination of active contour and morphological operations, (ii) a modified Chan-Vese algorithm and (iii) a combination of edge detection and ellipse fitting methods. The PPA region is identified from the presence of bright pixels in the temporal zone of the OD, and segmented using a sequence of techniques, including a modified Chan-Vese approach, thresholding, scanning filter and multi-seed region growing methods. The work demonstrates for the first time how the OD and PPA regions can be identified and quantified from 2D fundus images using a standard fundus camera.
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Bola, Sampol Raúl. "Development of optical tools for biological applications based on acousto-optic technology." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/672264.
Повний текст джерелаАнотація:
To ensure progress in the field of biomedicine and drug development, it is essential to keep improving the equipment needed to carry out most of the experiments. With better tools, scientists can be more efficient, increasing the quality and volume of collected data from biological samples. At the same time, these tools should offer enough flexibility to adapt to new protocols and experiments.
Among all the tools used in cell biology laboratories, photonic technology is the most popular, since it is considered a non-invasive technique, being fully compatible with living samples. The work done in this thesis focuses on the development of two optical tools with great applicability in the field of cell biology: an optical trapping and force measurement system and a novel and flexible confocal microscopy unit. The combination of both apparatus will allow biologists to manipulate and measure forces inside living cells, while providing high contrast visualization of the specimen in real time. Both technologies share the same light modulator element: an acousto-optic deflector (AOD).
AODs are diffractive devices that use mechanical waves to deflect an incident beam of light with extreme precision and speed (in the kilohertz to megahertz range). Despite being developed in the 30s, their full potential has not been exploited until now. During the thesis, I have carried out a thorough study of the AOD properties, culminating in a new way to understand and use these devices: the acousto-optic holography (AOH). With slight modifications in the control electronics, these devices can be used in the same way as a full complex spatial light modulator. With this new approach, AODs can project arbitrary light patterns and scanning schemes, going beyond their main application as pure beam deflectors.
Incorporating AODs in an optical trapping system allows generating multiple stable optical traps through time multiplexing a single laser beam, catching and manipulating a plurality of objects at the same time. This scheme also allows synchronizing the laser position with a force measurement system based on direct momentum changes, being able to address single object information.
The optical trapping system developed in the first half of this thesis has been used to perform controlled oscillations, as well as measure the response force, in a variety of situations. It has been employed to obtain information about the mechanical properties of some biological structures, such as the cellular cytoskeleton or in active gels of tubulin bundles.
Second, focusing on acousto-optic holography, the thesis presents a new confocal microscope concept: the programmable array microscope, which serves as the starting point for a new generation of solid-state digital microscopes. This new concept proposes eliminating all the mechanical and mobile elements of conventional microscopes and replacing them with fully programmable elements. Specifically, it proposes eliminating the physical ”pinhole” and motorized scanning systems, thus resulting in a very flexible device.
The prototype allows the projection of an infinity of structured light patterns at high speeds to produce high-quality reconstructions. Given the high degree of flexibility, this new solid-state microscope can implement multiple imaging modes that can adapt to the needs of each experiment and/or sample. Apart from implementing already existing techniques, the prototype allows the investigation of new imaging modes and smart scanning schemes. These new modes aim to extract sample information more efficiently, faster, or at a higher resolution.
The thesis details the entire development process of the prototype, both in the optomechanical design, the generation of lighting patterns and scanning schemes. Regarding the confocal filtering part, we present two different solutions. First, we present a set of new image processing algorithms that take advantage of our flexible illumination system. Then, we provide the development of a custom and flexible camera module that allows arbitrary pixel reading.
Finally, with the same technology, two different paths have been explored in the field of super-resolution. On the one hand, the confocal system has been adapted for the parallelization of STED microscopy, speeding up the capture process and presenting promising first results. On the other hand, we have explored computational strategies based on deep learning that allow the recovery of high frequencies. This allows the observation of fine structures well beyond the diffraction limit barrier.Per poder garantir l’avanç de les ciències de la vida, amb la gran repercussió a la salut mundial que això comporta, és important anar millorant les eines amb les quals els científics (especialment els biòlegs) desenvolupen els experiments, podent així millorar la quantitat i el volum de les dades extretes. Amb noves eines, els investigadors poden desenvolupar i dissenyar nous experiments que proporcionin informació rellevant sobre l’estudi i la comprensió de molts processos cel·lulars i malalties. La tesi tracta sobre el desenvolupament de dos sistemes òptics amb gran aplicació en el camp de la biologia, ambdues basades en un element modulador de llum comú, els deflectors acusto-òptics (AODs). El AODs són dispositius totalment analògics, on s’utilitzen ones acústiques per poder modular i deflectar un làser amb una gran precisió i velocitat. A la primera part, s’explica el desenvolupament d’un sistema d’atrapament òptic i mesura de força. El sistema permet atrapar i manipular, de manera estable, múltiples objectes, així com realitzar oscil·lacions controlades. Al mateix temps, el sistema és totalment compatible amb mesura de forces per canvis de moment. Tot això permet paral·lelitzar experiments a l’interior cel·lular de manera totalment invasiva, oferint informació sobre les propietats mecàniques de diverses estructures biològiques. A la segona part, es presenta una nova forma d’entendre i utilitzar aquests dispositius: l’holografia acusto-òptica. Mitjançant la generació de senyals acústiques complexes, els AODs permeten projectar patrons de llum arbitraris, més enllà del seu ús principal com a deflectors làser. Això porta al desenvolupament d’un nou microscopi confocal, totalment programable i sense elements mecànics o mòbils. El microscopi permet projectar una infinitat de patrons de llum estructurada, per tal d’obtenir reconstruccions d’alta qualitat a centenars d’imatges per segon. Aquesta nova plataforma de microscòpia d’estat sòlid, permet investigar i implementar una infinitat de maneres d’imatge, per adaptar-se a les necessitats de cada experiment i / o mostra.
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Williams, Wesley Harlan. "Tool design for and process optimization of an automated workstation for the manufacture of fiber optic gyroscopes." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9879.
Повний текст джерела
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Quaglia, Casal Luciano. "Developing a Combinatorial Synthesis Database Tool." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-374858.
Повний текст джерелаАнотація:
Thin-film solar cell research is central to the electricity production of the near future. Photovoltaic technologies based on silicon have a significant portion of the global market and installed capacity. Thin-film solar cells are port of the emerging photovoltaic technologies that are challenging silicon for a part of the electricity production based on solar power. These thin-film technologies, such as copper indium gallium selenide (CIGS) and cadmium telluride (CdTe), are lower cost and require less energy to produce, but also require rare materials. An alternative to these technologies are thin-film solar cells based on more abundant materials. To develop these new materials at Uppsala University, combinatorial synthesis is used. This method produces a significant amount of data across different measurement methods. The data needs to be analysed and combined to gather information about the characteristics of the materials being developed. To facilitate the analysis and combination of data, a database tool was created in MATLAB. The result is a program that allows its User to combine energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy and Photoluminescence spectroscopy measurements done on solar cell absorber layers. Absorber layers are the section of solar cells where sun lighet is absorbed, and electron-hole pairs are created. The program provides multiple figures and graphs combining the different data collected, enabling the User to draw conclusions about the characteristics of the sample and its suitability as an absorber layer. The combinatorial synthesis database tool created could be user for combinatorial synthesis analysis of other material samples that are not necessarily absorber layers for thin-film solar cells. This report describes both the development of the tool and the code itself.
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Wigdahl, Jeffrey. "Retinal Vascular Measurement Tools for Diagnostic Feature Extraction." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3423246.
Повний текст джерелаАнотація:
The contributions of this work are in the development of new and state of the art algorithms for retinal image analysis including optic disc detection, tortuosity estimation, and cross-over abnormality detection. The retina is one of the only areas of the human body that blood vessels can be visualized noninvasively. Retinal imaging has become a standard in the ophthalmologist’s office because it is an easy and inexpensive way to monitor not just eye health, but also systemic vascular diseases. Changes to the retinal vasculature can be the early signs of diseases such as diabetic and hypertensive retinopathy, of which early detection can save vision, money, and improve overall health for the patient. When looking at the retinal vasculature, ophthalmologists generally rely on a qualitative assessment which can make comparisons over time or between different ophthalmologists difficult. Computer aided systems are now able to quantify what the ophthalmologist is qualitatively measuring in what they consider to be the most important features of the vasculature. These include, but are not limited to, tortuosity, arteriolar narrowing, cross-over abnormalities, and artery-vein (AV) ratio. The University of Padova has created a semi-automatic system for detecting and quantifying retinal vessels starting from optic disc detection, vessel segmentation, width estimation, tortuosity calculation, AV classification, and AV ratio. We propose a new method for optic disc detection that converts the retinal image into a graph and exploits vessel enhancement methods to calculate edge weights in finding the shortest path between pairs of points on the periphery of the image. The line segment with the maximum number of shortest paths is considered the optic disc location. The method was tested on three publicly available datasets: DRIVE, DIARETDB1, and Messidor consisting of 40, 89, and 1200 images and achieved an accuracy of 100, 98.88, and 99.42% respectively. The second contribution is a new algorithm for calculating abnormalities at AV crossing points. In retinal images, Gunn’s sign appears as a tapering of the vein at a crossing point, while Salus’s sign presents as an S-shaped curving. This work presents a method for the automatic quantification of these two signs once a crossover has been detected; combining segmentation, artery vein classification, and morphological feature extraction techniques to calculate vein widths and angles entering and exiting the crossover. Results on two datasets show separation between the two classes and that we can reliably detect and quantify these signs under the right conditions. The last contribution in tortuosity consists of two parts. A comparative study was performed on several of the most popular methods for tortuosity estimation on a new vessel dataset. Results show that several methods have good Cohen’s kappa agreement with both graders, while the tortuosity density metric has the highest single metric average agreement across vessel type and grader. The second is a new way to enhance curvature in segmented vessels based on a difference of Gabor filters to create a curvature enhanced image. The proposed method was tested on the RET-TORT database using several methods to calculate tortuosity, and had best Pearson’s correlation of .94 for arteries and .882 for veins, outperforming single mathematical formulations on the data. This held true after testing the method on the propose dataset as well, having higher correlation values across grader and vessel type compared with other tortuosity metrics.
Summary of Results:
The optic disc detection method was tested on three publicly available datasets: DRIVE, DIARETDB1, and Messidor consisting of 40, 89, and 1200 images and achieved an accuracy of 100, 98.88, and 99.42% respectively.
The AV nicking quantification method was tested on a small dataset of 10 crossing provided by doctors at Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece. Results showed separation between the normal and abnormal classes for both the Gunn and Salus sign. The method was then tested on a larger, publicly available dataset which showed good separation for the Gunn sign.
The proposed tortuosity method was tested on the RET-TORT database using several methods to calculate tortuosity, and had best Pearson’s correlation of .94 for arteries and .882 for veins, outperforming single mathematical formulations on the data. It was then tested on the dataset proposed in this thesis, further corroborating the effectiveness of the method.I contributi di questo lavoro sono per lo sviluppo di nuovi e lo stato degli algoritmi d'arte per l'analisi di immagini tra cui il rilevamento della retina ottica del disco, la stima tortuosità, e anomalia rilevamento cross-over. La retina è una delle poche zone del corpo umano che vasi sanguigni possono essere visualizzate in maniera non invasiva. imaging della retina è diventato uno standard nell'ufficio del oculista Poiché si tratta di un modo semplice e poco costoso per monitorare non solo la salute degli occhi, ma anche le malattie vascolari sistemiche. Le modifiche al sistema vascolare della retina possono essere i primi segni di malattie come la retinopatia diabetica e ipertensiva, di cui la diagnosi precoce può salvare la visione, il denaro, e migliorare la salute generale del paziente. Se si guarda alla vascolarizzazione della retina, oftalmologi in genere si basano su una valutazione qualitativa che può fare comparazioni nel tempo o tra i diversi oculisti difficile. Computer Aided sistemi sono ora incendio quantificare ciò che l'oculista è qualitativamente misura in quello che considerano essere le caratteristiche più importanti del sistema vascolare. Questi includono, ma non sono limitati a, tortuosità, arteriolare restringimento, anomalie di crossover, e il rapporto arteria-vena (AV). L'Università di Padova ha creato un sistema semi-automatico per la rilevazione e quantificazione vasi retinici a partire dalla rilevazione ottica del disco, la segmentazione nave, la stima di larghezza, il calcolo tortuosità, la classificazione AV, e il rapporto di AV. Abbiamo proposto un nuovo metodo per il rilevamento ottico che converte l'immagine retinica in un grafico e sfrutta disco metodi di aumento del vaso per calcolare i pesi bordo nel trovare il percorso più breve tra coppie di punti sulla periferia dell'immagine. Il segmento linea con il numero massimo di percorsi più brevi è considerata la posizione del disco ottico. Il metodo è stato testato su tre insiemi di dati accessibili al pubblico: DRIVE, DIARETDB1, e Messidor Composto da 40, 89, e 1200 immagini e ha raggiunto una precisione di 100, 98.88, e 99.42% respectively. Il secondo contributo è un nuovo algoritmo di calcolo anomalie AV ai punti di attraversamento. Nelle immagini della retina, segno di Gunn appare come una rastremazione della vena in un punto di passaggio, mentre il segno di Salus presenta come una curva a forma di S. Questo lavoro presenta un metodo per la quantificazione automatica di questi due segni once a incrocio è stato rilevato; combinando la segmentazione, l'arteria di classificazione della vena, e le tecniche di estrazione delle caratteristiche morfologiche per calcolare le larghezze delle vene e gli angoli che entrano ed escono il crossover. Risultati su due serie di dati mostrano la separazione tra le due classi e che possiamo in modo affidabile rilevare e quantificare Questi segni sotto le giuste condizioni. L'ultimo contributo in tortuosità compone di due parti. Uno studio comparativo è stato condotto su alcuni dei metodi più diffusi per la stima su un nuovo insieme di dati nave tortuosità. Che i risultati mostrano diversi metodi avere buon accordo con Cohen kappa Entrambi i selezionatori, mentre la metrica densità di tortuosità ha la più alta accordo metrica singola media di tipo di nave e selezionatore. Il secondo è un nuovo modo per migliorare curvature nei vasi segmentati sulla base di una differenza di Gabor filtri per creare una curvatura immagine migliorata. Theproposed Il metodo è stato testato su database RET-TORT utilizzando diversi metodi per calcolare tortuosità, e aveva più di correlazione di Pearson di .94 per arterie e vene per 0,882, superando singole formulazioni matematiche alla data. Questo valeva dopo aver testato il metodo proposto sul set di dati e, avendo valori di correlazione più elevati in tutta grader e tipo di imbarcazione tortuosità Rispetto ad altre metriche. Sintesi dei risultati: Il metodo di rilevazione disco ottico è stato testato su tre insiemi di dati accessibili al pubblico: DRIVE, DIARETDB1, e Messidor Composto da 40, 89, e 1200 immagini e ha raggiunto una precisione di 100, 98.88, e 99.42% respectively. Il metodo di quantificazione AV intaccare è stato testato su un piccolo insieme di dati di 10 attraversamento forniti dai medici Papageorgiou Hospital, Università Aristotele di Salonicco, Salonicco, Grecia. I risultati hanno mostrato separazione tra le normali e anormali Entrambe le classi per il segno Gunn e Salus. Il metodo è stato poi testato su un set di dati più grandi, a disposizione del pubblico che ha mostrato una buona separazione per il segno Gunn. Il metodo tortuosità Theproposed è stato testato su database RET-TORT utilizzando diversi metodi per calcolare tortuosità, e aveva più di correlazione di Pearson di .94 per arterie e vene per 0,882, superando singole formulazioni matematiche alla data. E 'stato poi testato su set di dati Theproposed in questa tesi, Ulteriori confermano l'efficacia del metodo.
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Padayachy, Llewellyn. "Ultrasound as a non-invasive diagnostic tool in paediatric neurosurgery : relationship between the optic nerve sheath diameter (ONSD) and intracranial pressure (ICP)." Doctoral thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/16787.
Повний текст джерелаАнотація:
Includes bibliographical referencesBackground: Assessment of intracranial pressure (ICP) is an essential aspect in the management of most neurosurgical conditions in children. While invasive ICP monitoring is considered the criterion standard, the need for a reliable, non-invasive, easy-to-use and accurate method to detect and monitor raised ICP has inspired the development of many useful techniques. The present study examined the relationship between transorbital ultrasound measurement of the optic nerve sheath diameter (ONSD) and invasively measured ICP in children, as well as the influence of relevant physiological and demographic variables on this relationship. Methodology: ONSD measurement was performed using a high frequency, small footprint linear array probe, and prior to invasive ICP measurement. All patients were under general anaesthesia and being mechanically ventilated. Physiological variables including systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), pulse rate, temperature, respiratory rate and end tidal carbon dioxide (ETCO2) level were recorded at the time of ONSD measurement. The ONSD measurements were analysed for repeatability, intra- and inter-observer variability as well for correlation between images acquired in different planes and those obtained from either eye. The diagnostic accuracy of ONSD measurement for detecting ICP at different thresholds of 20, 15, 10 and 5 mmHg was analysed. This analysis included evaluation of age-related thresholds for defining different ONSD cut-off values in children. Dynamic image acquisition was performed and analysed to evaluate the relevant pulsatile motion of the ONS as a marker of the sheath stiffness. Results: One hundred and seventy four children undergoing diagnostic or therapeutic surgical procedures were included in this study. ONSD measurement demonstrated good correlation with ICP across the entire patient cohort (r = 0.66, p < 0.001), but was better in children > 1 year or with a closed anterior fontanelle (AF) (r = 0.7, p < 0.001). Age above and below 1 year was found to be an appropriate age threshold for defining two different sets of ONSD cut-off values. The study however, supported using patency of the AF as a stronger clinical marker for describing different ONSD cut-off values in children. The second part of this work described a dynamic technique for analysing the pulsatile motion of the ONS. Analysis of the deformability index (DI) as an indirect marker of ONS stiffness, revealed a statistically significant relationship with ICP (sensitivity of 90%, specificity of 87% for detecting ICP ≥ 20 mmHg). Conclusion: Measurement of the ONSD is a sensitive surrogate marker of raised ICP, but demonstrated poorer specificity. This relationship was more reliable in older children, particularly when the AF was closed. Analysis of the dynamic characteristics of the ONS appeared to provide useful additional information as an independent marker, and may contribute to our overall understanding of ONSD measurement in raised ICP.
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Padayachy, Vaishali. "Transorbital ultrasound measurement of the optic nerve sheath diameter (ONSD) as a screening tool for raised intracranial pressure in an acute care setting in children." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/20431.
Повний текст джерелаАнотація:
Background: Acute care management of pediatric traumatic brain injury (TBI) can be challenging. Early and reliable diagnosis of intracranial pressure (ICP) in children following TBI is vital in optimizing outcome. Clinical findings of raised ICP can be non-specific and are often missed in minor injuries, leading to severe consequences. The use of a simple, quick, accurate, non-invasive technique to assess ICP can be invaluable in this setting. Based on the hypothesis that acutely raised ICP will result in an enlargement of the optic nerve sheath diameter (ONSD), this study aimed to demonstrate the efficacy of transorbital measurement of the ONSD as a routine screening tool in pediatric TBI. Methodology: This was a prospective observational analysis of a pediatric cohort of patients with head injury, treated in the trauma unit. All children included in the study were clinically assessed, and had indications for cranial computer tomography (CT) scan. All optic nerve sheath imaging was conducted by a single investigator, experienced in the use of ultrasound for emergency care. ONSD measurements were conducted using a high frequency, linear array probe. Patients were sedated and ONSD measurement was performed prior to or immediately after CT imaging. A total of 12 images were obtained in each patient, 3 axial and 3 sagittal images in each eye and the mean ONSD was calculated. ONSD measurements were analyzed in relation to clinical severity, CT findings of raised ICP and outcome of the patient.
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Ekberg, Lars Peter. "Development of ultra-precision tools for metrology and lithography of large area photomasks and high definition displays." Doctoral thesis, KTH, Mätteknik och optik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122264.
Повний текст джерелаАнотація:
Large area flat displays are nowadays considered being a commodity. After the era of bulky CRT TV technology, LCD and OLED have taken over as the most prevalent technologies for high quality image display devices. An important factor underlying the success of these technologies has been the development of high performance photomask writers in combination with a precise photomask process. Photomask manufacturing can be regarded as an art, highly dependent on qualified and skilled workers in a few companies located in Asia. The manufacturing yield in the photomask process depends to a great extent on several steps of measurements and inspections. Metrology, which is the focus of this thesis, is the science of measurement and is a prerequisite for maintaining high quality in all manufacturing processes. The details and challenges of performing critical measurements over large area photomasks of square meter sizes will be discussed. In particular the development of methods and algorithms related to the metrology system MMS15000, the world standard for large area photomask metrology today, will be presented. The most important quality of a metrology system is repeatability. Achieving good repeatability requires a stable environment, carefully selected materials, sophisticated mechanical solutions, precise optics and capable software. Attributes of the air including humidity, CO2 level, pressure and turbulence are other factors that can impact repeatability and accuracy if not handled properly. Besides the former qualities, there is also the behavior of the photomask itself that needs to be carefully handled in order to achieve a good correspondence to the Cartesian coordinate system. An uncertainty specification below 100 nm (3σ) over an area measured in square meters cannot be fulfilled unless special care is taken to compensate for gravity-induced errors from the photomask itself when it is resting on the metrology tool stage. Calibration is therefore a considerable challenge over these large areas. A novel method for self-calibration will be presented and discussed in the thesis. This is a general method that has proven to be highly robust even in cases when the self-calibration problem is close to being underdetermined. A random sampling method based on massive averaging in the time domain will be presented as the solution for achieving precise spatial measurements of the photomask patterns. This method has been used for detection of the position of chrome or glass edges on the photomask with a repeatability of 1.5 nm (3σ), using a measurement time of 250 ms. The method has also been used for verification of large area measurement repeatability of approximately 10 nm (3σ) when measuring several hundred measurement marks covering an area of 0.8 x 0.8 m2. The measurement of linewidths, referred to in the photomask industry as critical dimension (CD) measurements, is another important task for the MMS15000 system. A threshold-based inverse convolution method will be presented that enhances resolution down to 0.5 µm without requiring a change to the numerical aperture of the system. As already mentioned, metrology is very important for maintaining high quality in a manufacturing environment. In the mask manufacturing industry in particular, the cost of poor quality (CoPQ) is extremely high. Besides the high materials cost, there are also the stringent requirements placed on CD and mask overlay, along with the need for zero defects that make the photomask industry unique. This topic is discussed further, and is shown to be a strong motivation for the development of the ultra-precision metrology built into the MMS15000 system.QC 20130515
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Isaacson, Matthew David. "Using new tools to study the neural mechanisms of sensation : auditory processing in locusts and translational motion vision in flies." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288741.
Повний текст джерелаАнотація:
This thesis describes work from both the University of Cambridge in the lab of Berthold Hedwig and from the HHMI Janelia Research Campus in the lab of Michael Reiser. At the University of Cambridge, my work involved the development and demonstration of a method for electrophoretically delivering dyes and tracers for anatomical and functional imaging into animals that are not amenable to genetic labelling techniques. Using this method in locusts and crickets - model systems of particular interest for their acoustic communication - I successfully delivered polar fluorescent dyes and tracers through the sheath covering the auditory nerve, simultaneously staining both the peripheral sensory structures and the central axonal projections without destroying the nerve's function. I could label neurons which extend far from the tracer delivery site on the nerve as well as local neuron populations through the brain's surface. I used the same method to deliver calcium indicators into central neuropils for in vivo optical imaging of sound-evoked activity, as well as calling song-evoked activity in the brain. The work completed at the Janelia Research Campus began with the development of a modern version of a modular LED display and virtual reality control system to enable research on the visual control of complex behaviors in head-fixed animals. The primary advantages of our newly developed LED-based display over other display technologies are its high-speed operation, brightness uniformity and control, precise synchronization with analog inputs and outputs, and its ability to be configured into a variety of display geometries. Utilizing the system's fast display refresh rates, I conducted the first accurate characterization of the upper limits of the speed sensitivity of Drosophila for apparent motion during flight. I also developed a flexible approach to presenting optic flow scenes for functional imaging of motion-sensitive neurons. Finally, through the on-line analysis of behavioral measures, image rendering, and display streaming with low latency to multi-color (UV/Green) LED panels, I demonstrated the ability to create more naturalistic stimuli and interactive virtual visual landscapes. Lastly, I used this new visual display system to explore a newly discovered cell-type that had been implicated in higher-order motion processing from a large genetic screen of visually-guided behavior deficits. Using genetic silencing and activation methods, and by designing stimuli that modeled the optic flow encountered during different types of self-motion, colleagues in the Reiser lab and I showed that this cell-type - named Lobula Plate Columnar 1 (LPC1) - is required for the stopping behavior of walking flies caused by back-to-front translation motion but is not involved in the rotational optomotor response. Using calcium imaging, I found that LPC1 was selectively excited by back-to-front motion on the eye ipsilateral to the neuron population and inhibited by front-to-back motion on the contralateral eye, demonstrating a simple mechanism for its selectivity to translation over rotation. I also examined an anatomically similar cell type - named Lobula-Lobula Plate Columnar type 1 (LLPC1) - and found that its selectivity results from a similar but opposite calculation for the detection of front-to-back translational motion. The detection of back-to-front motion had previously been hypothesized to be useful for collision avoidance, and this work provides a neural mechanism for how this detection could be accomplished, as well as providing a platform from which to explore the larger network for translation optic flow.
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SHARMA, MOHIT. "COMBINED ECONOMIC EMISSION DISPATCH USING OPTIM –TOOL." Thesis, 2012. http://dspace.dtu.ac.in:8080/jspui/handle/repository/13900.
Повний текст джерелаАнотація:
M.TECHCombined economic emission dispatch (CEED) problem is to schedule the committed generating units’ outputs to meet the required load demand at minimum operating cost with minimum emission simultaneously. This multi-objective CEED problem is converted into a single objective function using a price penalty factor. In this paper, combined economic emission dispatch problem (CEED) problem has been formulated using price penalty factor and solving the problem using GA toolbox of MATLAB R2008b. The multi-objective optimization problem is solved using optimization tool by means of assigning a price penalty factor to the emission function. This method makes it possible to combine the two objective functions into a single objective one. In the proposed method, price penalty factor is calculated and by calculating the value of hi with the described method and MATLAB OPTIMTOOL program is run for each value hi. The m-files for constraint function and objective function are written to execute the program in OPTIMTOOL in MATLAB. The feasibility of the proposed approach is demonstrated for two different power systems, six generators unit and eleven generators units for 500-2500 MW loads and compared with other methods as particle swarm optimization(PSO), differential evolution(DE), -iteration, recursive(RM) and simplified recursive method(SRM) for given systems .Data for six generators unit and eleven generators unit are taken from Scientific Research and Essays, Ugur Guvenc and Electric Power Components and Systems, R. Balamurugan , S. Subramanian. The study results show that the proposed approach is more efficient in finding higher quality solutions in CEED problems. Software used: MATLAB 7.6.0
Книги з теми "OPTIM –TOOL"
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Pearson, Ruth, Madhura Killedar, Janka Petravic, Jakub J. Kakietek, Nick Scott, Kelsey L. Grantham, Robyn M. Stuart, et al. Optima Nutrition: An Allocative Efficiency Tool to Reduce Childhood Stunting by Better Targeting of Nutrition-Related Interventions. Springer, 2018. http://dx.doi.org/10.1596/31366.
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Ronen, Boaz, Joseph S. Pliskin, and Shimeon Pass. Principles of Management in the Dynamic Healthcare Environment (DRAFT). Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190843458.003.0002.
Повний текст джерелаАнотація:
Today’s healthcare environment is dynamic with constantly growing demands, high complexity, high degree of uncertainty, fierce competition and is coping with new technologies and facing challenges from demanding patients. To survive in such an environment, managers should view the system globally, focus on the essentials, and use simple tools. This chapter discusses how to avoid suboptimization of systems, as the sum of local optima is not the system optimum. Similarly, this chapter introduces the practical notion of the satisficer’s approach that advocates for “good enough” solutions rather than the optimizer’s approach that always looks for perfect solutions. Finally, the chapter introduces the focused management approach that integrates concepts and tools such as the Lean approach, TOC, and the complete kit concept.
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Winearls, Christopher G. Kidney disease-focused features on examination. Edited by Christopher G. Winearls. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199592548.003.0005.
Повний текст джерелаАнотація:
Examination depends on the context and clinical presentation and the emphasis will be different too. Tell-tale signs are often unnoticed in the general examination of the eyes (lecithin cholesterol acyltransferase deficiency, Fabry disease, corneal calcification), the skin (vasculitis, Anderson–Fabry disease), the optic fundus (haemorrhages and exudates, papilloedema), and the hands (nail patella syndrome, splinter haemorrhages of systemic lupus erythematosus, and subacute bacterial endocarditis). Many of these are illustrated. The regular review of patients on dialysis or with a kidney transplant is also considered.
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Nagy, Andrea Marika. Developing the tools for molecular interferometry: Ultrafast pulse shaping and characterization using an acousto-optic programmable dispersive filter and transient grating frequency resolved optical gating. 2002, 2002.
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United States Government US Army. Technical Manual TM 9-1240-416-13&P Operator and Field Maintenance Manual Including Repair Parts and Special Tools List for the M150 Sight, Rifle Combat Optic (RCO) (NSN: 1240-01-557-1897) Change 1. Independently Published, 2019.
Знайти повний текст джерелаЧастини книг з теми "OPTIM –TOOL"
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Sychugov, V. A., A. V. Tishchenko, M. S. Klimov, and O. Parriaux. "CAD-Tool for Integrated Optic Coupling Gratings." In Micro System Technologies 90, 44–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-45678-7_7.
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Naves, S. Cyril. "B-SPECS: An Optic Based Recognition Tool for Blind." In Advances in Parallel Distributed Computing, 544–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24037-9_54.
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Zipoli Caiani, Silvano. "When Mechanical Computations Explain Better." In Language, Cognition, and Mind, 463–77. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-50200-3_21.
Повний текст джерелаАнотація:
AbstractIn this paper I defend the epistemic value of the representational-computational view of cognition by arguing that it has explanatory merits that cannot be ignored. To this end, I focus on the virtue of a computational explanation of optic ataxia, a disorder characterized by difficulties in executing visually-guided reaching tasks, although ataxic patients do not exhibit any specific disease of the muscular apparatus. I argue that addressing cases of patients who are suffering from optic ataxia by invoking a causal role for internal representations is more effective than merely relying on correlations between bodily and environmental variables. This argument has consequences for the epistemic assessment of radical enactivism, whichRE invokes the Dynamical System Theory as the best tool for explaining cognitive phenomena.
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Wu, Zhichao, Michael A. Coote, and Keith R. Martin. "Getting Better: Learning, New Tools and Risk Management." In The Optic Nerve Head in Health and Disease, 159–62. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6838-5_10.
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Bouzid, Karim. "5-Tools and Methods for Electro-Optic Simulation." In OLED Microdisplays, 95–117. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781119004745.ch4.
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Langloh, N., V. Christopoulos, S. Van Langendonck, J. Cornelis, R. Vounckx, A. Kirk, R. Buczynski, H. Thienpont, and I. Veretennicoff. "Optsim: A Tool for the Design of Optical Parallel Computer Architectures." In Applications of Photonic Technology 2, 553–61. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_88.
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Fernandez-Granero, Miguel Angel, Auxiliadora Sarmiento Vega, Anabel Isabel García, Daniel Sanchez-Morillo, Soledad Jiménez, Pedro Alemany, and Irene Fondón. "Automatic Tool for Optic Disc and Cup Detection on Retinal Fundus Images." In Advances in Computational Intelligence, 246–56. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59153-7_22.
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Zhang, Yuan Liang, Zhi Min Zhou, and Xu Zhang. "Compensation Control of Cutting Tool Position in Machining Non-Axisymmetric Optic Mirror Surface." In Materials Science Forum, 181–86. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-990-3.181.
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Elrawashdeh, Zeina, Philippe Revel, Christine Prelle, and Frédéric Lamarque. "High Precision Fabrication of an Innovative Fiber-Optic Displacement Sensor." In Lecture Notes in Mechanical Engineering, 48–55. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_5.
Повний текст джерелаАнотація:
AbstractThis study presents the high precision fabrication technique, employed to manufacture a 3D conical grating, used as the reflector element, for a fiber-optic displacement sensor. To get high performance in terms of the surface quality, as well as a dimensional precision, the surface of the reflector must be a polished-mirror surface. To do so, a high precision turning machine along with aluminum alloy were the technical choices made. Two prototypes with different geometric dimensions, have been fabricated using the same machining strategy. Single crystal diamond tool was chosen, to obtain high surface roughness. The followed machining procedure was divided into two main parts; the first part achieves several cuts, to get the desired dimensions, and the last cut is deduced to get the desired nanometric roughness. Good results have been obtained, which validates the followed machining procedure.
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Blades, M. W., H. G. Schulze, S. O. Konorov, C. J. Addison, A. I. Jirasek, and R. F. B. Turner. "New Tools for Life Science Research Based on Fiber-Optic-Linked Raman and Resonance Raman Spectroscopy." In New Approaches in Biomedical Spectroscopy, 1–13. Washington, DC: American Chemical Society, 2007. http://dx.doi.org/10.1021/bk-2007-0963.ch001.
Повний текст джерелаТези доповідей конференцій з теми "OPTIM –TOOL"
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Grama, Alin, and Dorin Petreus. "A Matlab simulator tool for a class E power amplifier designed to generate plasma torch." In 2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2012. http://dx.doi.org/10.1109/optim.2012.6231867.
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Crisafulli, Vittorio, Andrea Gallivanoni, and Cristiano Pastore. "Model based design tool for EMC reduction using spread spectrum techniques in induction heating platform." In 2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2012. http://dx.doi.org/10.1109/optim.2012.6231901.
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Spammer, Stephanus J., Pieter L. Swart, and Hendrik C. L. Loock. "Early warning tool for chute failure in a sugar mill." In Pacific Northwest Fiber Optic Sensor Workshop, edited by Chuck C. Jung and Eric Udd. SPIE, 1998. http://dx.doi.org/10.1117/12.323425.
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Lalam, Nageswara, Ibrahiim Syed, Dolendra Karki, Kent Weisenberg, Ruishu F. Wright, and Paul R. Ohodnicki. "Robotic fiber optic internal deployment tool for pipeline integrity monitoring." In Fiber Optic Sensors and Applications XVIII, edited by Glen A. Sanders, Robert A. Lieberman, and Ingrid U. Scheel. SPIE, 2022. http://dx.doi.org/10.1117/12.2619045.
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Kilmer, Joyce P., John P. Varachi, Jr., and Hakan H. Yuce. "Postmortem analysis as a tool for building optical cable reliability (Invited Paper)." In Fiber Optic Components and reliability, edited by Paul M. Kopera and Dilip K. Paul. SPIE, 1992. http://dx.doi.org/10.1117/12.135418.
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Oliver, Steven A., Charles A. DiMarzio, Aniruddha B. Kale, Scott C. Lindberg, and Stephen W. McKnight. "Magneto-optic Kerr effect sensors for fiber optic applications." In Optical Tools for Manufacturing and Advanced Automation, edited by Ramon P. DePaula. SPIE, 1994. http://dx.doi.org/10.1117/12.169948.
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Maican, Catalin Ioan. "Methods for increasing the access to information databases using open source tools." In 2010 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2010. http://dx.doi.org/10.1109/optim.2010.5510365.
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Mihet-Popa, L., C. Koch-Ciobotaru, F. Isleifsson, and H. Bindner. "Development of tools for simulation systems in a distribution network and validated by measurements." In 2012 13th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2012. http://dx.doi.org/10.1109/optim.2012.6231807.
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Wada, T., K. Okayama, and Y. Morigo. "Tool wear of sintered cubic boron nitride compact in cutting hardened steel with high-pressure coolant supplied." In HPSM/OPTI 2016. Southampton UK: WIT Press, 2016. http://dx.doi.org/10.2495/hpsm160171.
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Girbea, Alina, Francisc Sisak, and Liviu Perniu. "Design, implementation and monitoring of a screw order handling process using business process management tools." In 2010 12th International Conference on Optimization of Electrical and Electronic Equipment (OPTIM). IEEE, 2010. http://dx.doi.org/10.1109/optim.2010.5510565.
Повний текст джерелаЗвіти організацій з теми "OPTIM –TOOL"
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VanKuiken, J. C., M. J. Jusko, and M. E. Samsa. OPTUM : Optimum Portfolio Tool for Utility Maximization documentation and user's guide. Office of Scientific and Technical Information (OSTI), September 2008. http://dx.doi.org/10.2172/943428.
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Blundell, S. User guide : the DEM Breakline and Differencing Analysis Tool—gridded elevation model analysis with a convenient graphical user interface. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/45040.
Повний текст джерелаАнотація:
Gridded elevation models of the earth’s surface derived from airborne lidar data or other sources can provide qualitative and quantitative information about the terrain and its surface features through analysis of the local spatial variation in elevation. The DEM Breakline and Differencing Analysis Tool was developed to extract and display micro-terrain features and vegetative cover based on the numerical modeling of elevation discontinuities or breaklines (breaks-in-slope), slope, terrain ruggedness, local surface optima, and the local elevation difference between first surface and bare earth input models. Using numerical algorithms developed in-house at the U.S. Army Engineer Research and Development Center, Geospatial Research Laboratory, various parameters are calculated for each cell in the model matrix in an initial processing phase. The results are combined and thresholded by the user in different ways for display and analysis. A graphical user interface provides control of input models, processing, and display as color-mapped overlays. Output displays can be saved as images, and the overlay data can be saved as raster layers for input into geographic information systems for further analysis.
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Hunter, R., S. Ross, and Jing-Ru Cheng. A general-purpose multiplatform GPU-accelerated ray tracing API. Engineer Research and Development Center (U.S.), July 2023. http://dx.doi.org/10.21079/11681/47260.
Повний текст джерелаАнотація:
Real-time ray tracing is an important tool in computational research. Among other things, it is used to model sensors for autonomous vehicle simulation, efficiently simulate radiative energy propagation, and create effective data visualizations. However, raytracing libraries currently offered for GPU platforms have a high level of complexity to facilitate the detailed configuration needed by gaming engines and high-fidelity renderers. A researcher wishing to take advantage of the performance gains offered by the GPU for simple ray casting routines would need to learn how to use these ray tracing libraries. Additionally, they would have to adapt this code to each GPU platform they run on. Therefore, a C++ API has been developed that exposes simple ray casting endpoints that are implemented in GPU-specific code for several contemporary device platforms. This API currently supports the NVIDIA OptiX ray tracing library, Vulkan, AMD Radeon Rays, and even Intel Embree. Benchmarking tests using this API provide insight to help users determine the optimal backend library to select for their ray tracing needs. HPC research will be well-served by the ability to perform general purpose raytracing on the increasing amount of graphics and machine learning nodes offered by the DoD High Performance Computing Modernization Program.
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Perdigão, Rui A. P. New Horizons of Predictability in Complex Dynamical Systems: From Fundamental Physics to Climate and Society. Meteoceanics, October 2021. http://dx.doi.org/10.46337/211021.
Повний текст джерелаАнотація:
Discerning the dynamics of complex systems in a mathematically rigorous and physically consistent manner is as fascinating as intimidating of a challenge, stirring deeply and intrinsically with the most fundamental Physics, while at the same time percolating through the deepest meanders of quotidian life. The socio-natural coevolution in climate dynamics is an example of that, exhibiting a striking articulation between governing principles and free will, in a stochastic-dynamic resonance that goes way beyond a reductionist dichotomy between cosmos and chaos. Subjacent to the conceptual and operational interdisciplinarity of that challenge, lies the simple formal elegance of a lingua franca for communication with Nature. This emerges from the innermost mathematical core of the Physics of Coevolutionary Complex Systems, articulating the wealth of insights and flavours from frontier natural, social and technical sciences in a coherent, integrated manner. Communicating thus with Nature, we equip ourselves with formal tools to better appreciate and discern complexity, by deciphering a synergistic codex underlying its emergence and dynamics. Thereby opening new pathways to see the “invisible” and predict the “unpredictable” – including relative to emergent non-recurrent phenomena such as irreversible transformations and extreme geophysical events in a changing climate. Frontier advances will be shared pertaining a dynamic that translates not only the formal, aesthetical and functional beauty of the Physics of Coevolutionary Complex Systems, but also enables and capacitates the analysis, modelling and decision support in crucial matters for the environment and society. By taking our emerging Physics in an optic of operational empowerment, some of our pioneering advances will be addressed such as the intelligence system Earth System Dynamic Intelligence and the Meteoceanics QITES Constellation, at the interface between frontier non-linear dynamics and emerging quantum technologies, to take the pulse of our planet, including in the detection and early warning of extreme geophysical events from Space.
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L51574 Non-Conventional Means for Monitoring Pipelines in Areas of Soil Subsidence or Soil Movement. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 1988. http://dx.doi.org/10.55274/r0010329.
Повний текст джерелаАнотація:
Examines non-conventional techniques for monitoring curvatures, displacement, or strains in buried pipelines. Internal devices, external devices, and fiber optic techniques were examined. Feasibility of each system is discussed and the most promising are identified. Two companion studies 'Guidelines Pipeline Strain Monitoring by Conventional Means' (Reference 1) and 'A Proposed Model for the Intervention Decision Making Process in Pipeline Movement Situations' (Reference 2) have already been completed, and an effort to determine appropriate failure criteria for pipelines in areas of soil instability is currently underway. The objective of this study is to describe methods of pipeline monitoring which are, for the most part, still in the conceptual and/or development phases. It is very likely that the techniques described herein will require extensive validation efforts and significant financial support before they will become reliable tools for routine use Improved pipeline strain monitoring techniques are needed because the conventional techniques (strain gages, inclinometers, and topographical surveying) meet all of the industry's needs. The conventional techniques are expensive, labor intensive, and require access to the pipeline for installation . As such they are limited in use to localized trouble spots that are known to be a problem. None of these techniques could be practically applied to a whole pipeline for any-time monitoring. Techniques that will better satisfy the industry's needs must be adequately sensitive, applicable to the whole pipeline, available at all times (or at least at reasonably frequent intervals), and capable of use without the need to excavate the pipeline or to interfere with its operation.Several non-conventional techniques for monitoring curvatures, displacements, or strains in buried pipelines that may meet these requirements are discussed herein. These fall into three generic classes: internal devices (instrumented pigs), external devices (involving moving a detecting device over the pipeline right-of-way), fiber-optic cables attached to the pipeline over its entire length.