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Academic literature on the topic 'BoBW model'

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Published: 6 September 2023

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Journal articles on the topic "BoBW model"

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Manzo, Mario, and Simone Pellino. "Bag of ARSRG Words (BoAW)." Machine Learning and Knowledge Extraction 1, no. 3 (August 5, 2019): 871–82. http://dx.doi.org/10.3390/make1030050.

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In recent years researchers have worked to understand image contents in computer vision. In particular, the bag of visual words (BoVW) model, which describes images in terms of a frequency histogram of visual words, is the most adopted paradigm. The main drawback is the lack of information about location and the relationships between features. For this purpose, we propose a new paradigm called bag of ARSRG (attributed relational SIFT (scale-invariant feature transform) regions graph) words (BoAW). A digital image is described as a vector in terms of a frequency histogram of graphs. Adopting a set of steps, the images are mapped into a vector space passing through a graph transformation. BoAW is evaluated in an image classification context on standard datasets and its effectiveness is demonstrated through experimental results compared with well-known competitors.
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Toman, Inka, Jonathan Loree, Alex Klimowicz, Nizar J. Bahlis, Raymond Lai, Andrew Belch, Linda M. Pilarski, and Tony Reiman. "High Oct-2 Protein Expression Is Associated with Decreased Overall Survival, While High Bob-1 Protein Expression Is Associated with Improved Overall Survival in Myeloma Patients." Blood 114, no. 22 (November 20, 2009): 2822. http://dx.doi.org/10.1182/blood.v114.22.2822.2822.

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Abstract Abstract 2822 Poster Board II-798 Background: Oct-2 and Bob1 are B-lymphoid lineage specific transcription factors which drive the expression of genes involved in B-lymphocyte and plasma cell development and differentiation, including the immunoglobulin heavy chain (IgH) genes and many others. It is also thought that these transcription factors drive the overexpression of oncogenes involved in IgH translocations through upregulation of the IgH enhancers. We sought to evaluate the expression of Oct-2 and Bob1 in multiple myeloma, a malignancy of the B cell/plasmacyte lineage, in order to determine their potential biological significance as determinants of disease behaviour/prognosis and as potential therapeutic targets. Methods: A tissue microarray containing triplicate samples from 220 myeloma patient samples was generated. Samples were collected at the time of diagnosis between 1993 and 2008. To measure Oct-2 and Bob-1 protein expression in the CD138+ plasma cells of each sample, fluorescent immunohistochemistry was used to stain the samples and the HistoRx PM-2000 platformTM was used to generate an AQUA score for each patient. Oct-2 AQUA scores were available for 169 patient samples and Bob-1 AQUA scores were available for 169 patient samples. The analysis was repeated using conventional immunohistochemistry and visual scoring of staining intensity. Results: The Oct-2 and Bob-1 AQUA scores were continuously distributed over the patient cohort; thus, subsequent analyses were done by dividing the patient cohort by the median Oct-2 or Bob-1 AQUA score and comparing the group with high AQUA scores to the group with low AQUA scores. The patient group with high Oct-2 AQUA scores had an OS of 52.8 months compared to 73.1 months in the group with low Oct-2 AQUA scores (hazard ratio [HR]=1.74, 95% confidence interval [CI]=1.11-2.73, p=0.0164). The patient group with high Bob-1 AQUA scores had an OS of 70.5 months compared with 38.3 months in the group with low Bob-1 AQUA scores (HR=0.46, 95% CI=0.29-0.71, p=0.0008). In a Cox regression proportional hazards model including autologous stem cell transplant (ASCT) status, serum albumin, serum β2-microglobulin and Oct-2 or Bob-1 AQUA scores, only ASCT status was independently predictive of OS. The patient group with low Oct-2 AQUA scores had a significantly higher proportion of ASCT recipients than the group with high Oct-2 AQUA scores. Conversely, the patient group with high Bob-1 AQUA scores had a significantly higher proportion of ASCT recipients than the group with low Bob-1 AQUA scores. Results were similar but not statistically significant when analyzing the TMA with conventional immunohistochemistry and visual scoring of staining intensity. Discussion: In this retrospective study high Oct-2 expression was found to be associated with decreased OS, while high Bob-1 protein expression was associated with increased OS. These results suggest that Oct-2 is a negative prognostic factor in myeloma, while Bob-1 is a favorable prognostic factor, and demonstrates the applicability of the HistoRx platform to myeloma bone marrow TMA analysis. Since this was a small, exploratory study these results must be interpreted with caution and must be confirmed in a larger, prospective analysis. Disclosures: No relevant conflicts of interest to declare.
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Sun, Huadong, Xu Zhang, Xiaowei Han, Xuesong Jin, and Zhijie Zhao. "Commodity Image Classification Based on Improved Bag-of-Visual-Words Model." Complexity 2021 (March 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/5556899.

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With the increasing scale of e-commerce, the complexity of image content makes commodity image classification face great challenges. Image feature extraction often determines the quality of the final classification results. At present, the image feature extraction part mainly includes the underlying visual feature and the intermediate semantic feature. The intermediate semantics of the image acts as a bridge between the underlying features and the advanced semantics of the image, which can make up for the semantic gap to a certain extent and has strong robustness. As a typical intermediate semantic representation method, the bag-of-visual-words (BoVW) model has received extensive attention in image classification. However, the traditional BoVW model loses the location information of local features, and its local feature descriptors mainly focus on the texture shape information of local regions but lack the expression of color information. Therefore, in this paper, the improved bag-of-visual-words model is presented, which contains three aspects of improvement: (1) multiscale local region extraction; (2) local feature description by speeded up robust features (SURF) and color vector angle histogram (CVAH); and (3) diagonal concentric rectangular pattern. Experimental results show that the three aspects of improvement to the BoVW model are complementary, while compared with the traditional BoVW and the BoVW adopting SURF + SPM, the classification accuracy of the improved BoVW is increased by 3.60% and 2.33%, respectively.
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Kotova, Galina, Mikhail Verigin, Tamash Gomboshi, and Konstantin Kabin. "ANALYTICAL MODEL OF THE PLANETARY BOW SHOCK FOR VARIOUS MAGNETIC FIELD DIRECTIONS BASED ON MHD CALCULATIONS." Solar-Terrestrial Physics 6, no. 4 (December 22, 2020): 44–49. http://dx.doi.org/10.12737/stp-64202007.

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Study of physical processes in plasma near planets often requires knowledge of the position and shape of the planetary bow shock. Empirical models are usually used since theoretical MHD and kinetic models consume too much computer time and cannot be used to track fast processes. M.I. Verigin proposed a semi-empirical approach based on the use of exact theoretical expressions with a small number of parameters, which have a clear physical meaning. These parameters are estimated by fitting experimental data or detailed MHD calculations. A model of the bow shock near an arbitrary-shaped obstacle has previously been developed for a gas-dynamic flow. This model can be applied to any sonic Mach numbers and large values of the Alfven Mach number. In addition, the asymptotic Mach cone — the angle of inclination of the shock wave at an infinite distance from the planet — has been calculated analytically in the MHD approximation. In this paper, we propose a model of the bow shock for any direction of the magnetic field with respect to the upcoming flow and for any Mach numbers. Parameters of the model are the distance of the nose point from the obstacle, radius of curvature and bluntness of the bow shock at the nose point, a parameter related to the transition to the asymptotic downstream slope of the shock, and a skewing angle appearing when the interplanetary magnetic field is directed at an angle to the solar wind velocity.
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N. Sultani, Zainab, and Ban N. Dhannoon. "Modified Bag of Visual Words Model for Image Classification." Al-Nahrain Journal of Science 24, no. 2 (June 1, 2021): 78–86. http://dx.doi.org/10.22401/anjs.24.2.11.

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Image classification is acknowledged as one of the most critical and challenging tasks in computer vision. The bag of visual words (BoVW) model has proven to be very efficient for image classification tasks since it can effectively represent distinctive image features in vector space. In this paper, BoVW using Scale-Invariant Feature Transform (SIFT) and Oriented Fast and Rotated BRIEF(ORB) descriptors are adapted for image classification. We propose a novel image classification system using image local feature information obtained from both SIFT and ORB local feature descriptors. As a result, the constructed SO-BoVW model presents highly discriminative features, enhancing the classification performance. Experiments on Caltech-101 and flowers dataset prove the effectiveness of the proposed method.
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Tőkés, László. "Hatvanhat éves a Solow-Swan modell = The Solow-Swan model just turned 66." Köz-gazdaság 17, no. 2 (August 2, 2022): 149–80. http://dx.doi.org/10.14267/retp2022.02.08.

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„Pontosan a növekedéselmélet az, amelyről beszélni akarok: önmagáért, az eredményeiért, a lyukakért, amelyeket még be kell tömni … .” – mondta Robert M. Solow 1987-ben, Nobel-díjas előadása elején, és ez a motivációja ennek a tanulmánynak is. A modern növekedéselmélet úttörőinek tekinthető Bob Solow és Trevor Swan alapvető tanulmányai 66 évvel ezelőtt, 1956-ban jelentek meg. A növekedési irodalom azóta elképesztően bővült. Ez az inkább tájékoztató, mint tudományos jellegű írás rövid áttekintést ad a főbb kutatási területekről, az empirikus eredményekre összpontosítva. = “Growth theory is exactly what I want to talk about: for itself, for its achievements, for the gaps that remain to be filled […]” – said Robert M. Solow in 1987, at the beginning of his Nobel Prize Lecture, and this is also the motivation of this paper. The seminal papers of Bob Solow and Trevor Swan, who can be considered the pioneers of modern growth theory, were published 66 years ago, in 1956. The growth literature has been expanding astonishingly since then. This more informative than scientific paper gives a brief survey of the main research areas, focusing on empirical results.
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Haroon, Muhammad, Junaid Baber, Ihsan Ullah, Sher Muhammad Daudpota, Maheen Bakhtyar, and Varsha Devi. "Video Scene Detection Using Compact Bag of Visual Word Models." Advances in Multimedia 2018 (November 8, 2018): 1–9. http://dx.doi.org/10.1155/2018/2564963.

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Video segmentation into shots is the first step for video indexing and searching. Videos shots are mostly very small in duration and do not give meaningful insight of the visual contents. However, grouping of shots based on similar visual contents gives a better understanding of the video scene; grouping of similar shots is known as scene boundary detection or video segmentation into scenes. In this paper, we propose a model for video segmentation into visual scenes using bag of visual word (BoVW) model. Initially, the video is divided into the shots which are later represented by a set of key frames. Key frames are further represented by BoVW feature vectors which are quite short and compact compared to classical BoVW model implementations. Two variations of BoVW model are used: (1) classical BoVW model and (2) Vector of Linearly Aggregated Descriptors (VLAD) which is an extension of classical BoVW model. The similarity of the shots is computed by the distances between their key frames feature vectors within the sliding window of length L, rather comparing each shot with very long lists of shots which has been previously practiced, and the value of L is 4. Experiments on cinematic and drama videos show the effectiveness of our proposed framework. The BoVW is 25000-dimensional vector and VLAD is only 2048-dimensional vector in the proposed model. The BoVW achieves 0.90 segmentation accuracy, whereas VLAD achieves 0.83.
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Xu, Wang Ming, Hang Yang, Kang Ling Fang, and Xin Hai Liu. "A Generalized BoVW Model for Content-Based Image Retrieval." Applied Mechanics and Materials 496-500 (January 2014): 1817–20. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.1817.

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BoVW (Bag of Visual Words) Model has attracted much attention for many computer vision applications in which an image is represented by a histogram of visual words. Two of its critical steps are to construct a visual dictionary and to quantize each local feature to its nearest visual word in the dictionary. In this paper, we present the framework of a generalized BoVW (GBoVW) Model in which feature quantization can be replaced by sparse coding based feature encoding. We also propose to use spectral clustering to construct a visual dictionary to overcome the shortcomings of K-Means based clustering algorithms. Image retrieval experiments on ZuBud database indicate that GBoVW Model improves BoVW Model and the visual dictionary generated by spectral clustering achieves better performance than that by K-Means based clustering methods.
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Gustafsson, M., T. Ravkilde, L. E. Kristensen, S. Cabrit, D. Field, and G. Pineau des Forêts. "3D model of bow shocks." Astronomy and Astrophysics 513 (April 2010): A5. http://dx.doi.org/10.1051/0004-6361/200912977.

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Soleti, Raffaella, Marine Coué, Charlotte Trenteseaux, Gregory Hilairet, Lionel Fizanne, Fatima Kasbi-Chadli, Patricia Mallegol, et al. "Carrot Supplementation Improves Blood Pressure and Reduces Aortic Root Lesions in an Atherosclerosis-Prone Genetic Mouse Model." Nutrients 13, no. 4 (April 2, 2021): 1181. http://dx.doi.org/10.3390/nu13041181.

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Epidemiological studies have shown that carrot consumption may be associated with a lower risk of developing several metabolic dysfunctions. Our group previously determined that the Bolero (Bo) carrot variety exhibited vascular and hepatic tropism using cellular models of cardiometabolic diseases. The present study evaluated the potential metabolic and cardiovascular protective effect of Bo, grown under two conditions (standard and biotic stress conditions (BoBS)), in apolipoprotein E-knockout (ApoE−/−) mice fed with high fat diet (HFD). Effects on metabolic/hemodynamic parameters and on atherosclerotic lesions have been assessed. Both Bo and BoBS decreased plasma triglyceride and expression levels of genes implicated in hepatic de novo lipogenesis and lipid oxidation. BoBS supplementation decreased body weight gain, secretion of very-low-density lipoprotein, and increased cecal propionate content. Interestingly, Bo and BoBS supplementation improved hemodynamic parameters by decreasing systolic, diastolic, and mean blood pressure. Moreover, Bo improved cardiac output. Finally, Bo and BoBS substantially reduced the aortic root lesion area. These results showed that Bo and BoBS enriched diets corrected most of the metabolic and cardiovascular disorders in an atherosclerosis-prone genetic mouse model and may therefore represent an interesting nutritional approach for the prevention of cardiovascular diseases.
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Dissertations / Theses on the topic "BoBW model"

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Sessions, Blake A. "A computational bow-spring model." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/65303.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, February 2011.
"May 2010." Cataloged from PDF version of thesis.
Bow-springs find few applications in industry. Principally, they are used in archery. In addition, they have found some use in a compression-spring mode in the field of biomechatronics, to emulate elastic human legs. The mechanical behavior (characterized by deflected shape and deformation force) is difficult to model, because internal forces and moments and the geometry are both unknown. The only closed-form solutions to such systems are relatively useless to a mechanical engineer. This work comprises an iterative model developed in MATLAB that computes the mechanical behavior of buckled beam (or bow-spring) sections, over a range of parameters and geometries, to be used in the development and testing of compression bow-springs as parallel loading systems to the human leg.
by Blake A. Sessions.
S.B.
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Cantone, Daniel. "Bob Johnson: Coach, Leader, Role Model, Community Servant." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etd/1155.

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Many things are known about Coach Bob Johnson including his military background and dynamic coaching career, but there are still many more facts that are unknown. By most accounts he was a dynamic leader who was able to motivate, influence, and lead over the course of his 27- year career coaching and teaching at Emory and Henry College. The success of his career is visible through the success of his players and teams, the number of wins, and the many accomplishments, awards, and recognitions he received. The purpose of this qualitative study was to describe Coach Johnson’s life by examining his life as a coach, teacher, administrator, and individual to help demonstrate his leadership and examine events that led to his impact and influence at Emory and Henry College. This study was based on 5 research questions: 1. What was his leadership style? 2. What type of person was he? 3. What type of coach was he? 4. What are the interviewees’ perceptions of how he influenced their lives? 5. What are the interviewees’ perceptions of his life and work? Findings from these questions helped provide answers that demonstrated the leadership and influence of Coach Johnson. The findings were consistent with Leithwood, Riehl, and the National College for School Leadership’s (2003) 3 core leadership practices for successful leadership in educational settings, which are setting directions, developing people, and developing the organization. The findings also fit into the Leadership Challenge Model (Kouzes & Posner, 1997), which consists of challenging the process, inspiring a shared vision, enabling others to act, modeling the way, and encouraging the heart. As there is no published research on Coach Johnson, this study is significant. The data were gathered by conducting semistructured interviews with those who knew Coach Johnson well. The results provide insight on leadership and how one can influence others.
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Vakkalanka, Suryanarayana. "Simplified Bow Model for a Striking Ship in Collision." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/32974.

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The serious consequences of ship collisions necessitate the development of regulations and requirements for the subdivision and structural design of ships to reduce damage and environmental pollution, and improve safety. Differences in striking ship bow stiffness, draft, bow height and shape have an important influence on the allocation of absorbed energy between striking and struck ships. The energy absorbed by the striking ship may be significant. The assumption of a â rigidâ striking bow may no longer hold good and typical simplifying assumptions may not be sufficient. The bow collision process is simulated by developing a striking ship bow model that uses Pedersen's super-element approach and the explicit non-linear FE code LS-DYNA. This model is applied to a series of collision scenarios. Results are compared with conventional FE model results, closed-form calculations, DAMAGE, DTU, ALPS/SCOL and SIMCOL. The results demonstrate that the universal assumption of a rigid striking ship bow is not valid. Bow deformation should be included in future versions of SIMCOL. A simplified bow model is proposed which approximates the results predicted by the three collision models, closed-form, conventional and intersection elements, to a reasonable degree of accuracy. This simplified bow model can be used in further calculations and damage predictions. A single stiffness can be defined for all striking ships in collision, irrespective of size.
Master of Science
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Mims, Patricia A. "Agricultural change in the urban-rural fringe: a test of the perimetropolitan bow wave model." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/43133.

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The urban-rural fringe in the United States is constantly shifting outward from the center of the metropolis, and urban landuses are displacing agriculture. Geographer John Fraser Hart developed the Perimetropolitan Bow Wave model to examine the movement of agriculture in a fifty mile radius of New York City. He concluded that agricultural activities differ in their rates of movement through four identified zones around the urban center. This thesis presents case studies of the movement of agricultural activities around two cities of different size--Washington, D.C. and Richmond, Virginia--to examine the validity of the bow wave phenomenon. The findings of this research are that Hart's model is useful only partially when examining other cities and that individual size and characteristics of the urban area must also be considered when analyzing agricultural change.
Master of Science
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Zawadzki, Alexi. "A sensitivity analysis of the hydrology of the Bow Valley above Banff, Alberta using the UBC Watershed Model." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq24395.pdf.

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Weymouth, Gabriel David. "Physics and learning based computational models for breaking bow waves based on new boundary immersion approaches." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44754.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.
Includes bibliographical references (p. 215-219).
A ship moving on the free surface produces energetic breaking bow waves which generate spray and air entrainment. Present experimental, analytic, and numerical studies of this problem are costly, inaccurate and not robust. This thesis presents new cost-effective and accurate computational tools for the design and analysis of such ocean systems through a combination of physics-based and learning-based models. Methods which immerse physical boundaries on Cartesian background grids can model complex topologies and are well suited to study breaking bow waves. However, current methods such as Volume of Fluid and Immersed Boundary methods have numerical and modeling limitations. This thesis advances the state of the art in Cartesian-grid methods through development of a new conservative Volume-of-fluid algorithm and the Boundary Data Immersion Method, a new approach to the formulation and implementation of immersed bodies. The new methods are simple, robust and shown to out perform existing approaches for a wide range of canonical test problems relevant to ship wave flows. The new approach is used to study breaking bow waves through 2D+T and 3D simulations. The 2D+T computations compare well with experiments and breaking bow wave metrics are shown to be highly sensitive to the ship geometry. 2D+T breaking bow wave predictions are compared quantitatively to 3D computations and shown to be accurate only for certain flow features and very slender high speed vessels. Finally the thesis formalizes the study and development of physics-based learning models (PBLM) for complex engineering systems. A new generalized PBLM architecture is developed based on combining fast simple physics-based models with available high-fidelity data.
(cont.) Models are developed and trained to accurately predict the wave field and breaking bow waves of a ship orders of magnitude faster than standard methods. Built on the new boundary immersion approaches, these computational tools are sufficiently cost-effective and robust for use in practical design and analysis.
by Gabriel David Weymouth.
Sc.D.
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Ghaffari, Reza [Verfasser], Roger Andrew Akademischer Betreuer] Sauer, and Robert [Akademischer Betreuer] [Svendsen. "Continuum mechanical models of atomistic crystalline surface manifolds / Reza Ghaffari ; Akademische Betreuer: Roger Andrew Sauer, Bob Svendsen." Aachen : Universitätsbibliothek RWTH Aachen, 2019. http://d-nb.info/1194111513/34.

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Tauscher, Helga [Verfasser], Raimar J. [Akademischer Betreuer] [Gutachter] Scherer, Bob [Gutachter] Martens, and Frank [Gutachter] Petzold. "Configurable nD-visualization for complex Building Information Models / Helga Tauscher ; Gutachter: Raimar J. Scherer, Bob Martens, Frank Petzold ; Betreuer: Raimar J. Scherer." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1144283493/34.

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Bellodi, Daniele Manfrim. "Influência da inclinação do garfo de mordida do arco facial na montagem do modelo superior em articulador semi-ajustável do tipo arcon e não-arcon." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-29102008-180252/.

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Durante o processo ensino/aprendizagem em Odontologia, é comum a ocorrência de inclinações do garfo de mordida em relação ao plano oclusal maxilar dos pacientes durante a tomada do arco facial realizada por alunos. Este trabalho avaliou a influência das inclinações do garfo de mordida para anterior e para posterior em relação ao plano oclusal na montagem do modelo maxilar em articuladores semi-ajustáveis do tipo arcon e não-arcon. Foram obtidos vinte modelos do arco maxilar de vinte pacientes, nos quais dois pontos foram marcados: um na aresta vestibular do canino direito e outro na aresta vestibular da cúspide mésio-vestibular do primeiro molar direito. Os registros no garfo de mordida foram realizados em três posições: garfo de mordida paralelo ao plano oclusal dos modelos, inclinado para anterior e para posterior (ambas 5º). Cada posição foi repetida cinco vezes, sendo o conjunto articulador/arco facial fixado em suporte especial para registro fotográfico. Cada fotografia foi levada ao programa Auto CAD, obtendo-se linhas de referências para a coleta de cinco medidas (uma angular e quatro lineares). Os dados obtidos foram submetidos à análise estatística paramétrica (Análise de Variância). Os resultados indicaram não haver diferença estatisticamente significante para inclinações do garfo de mordida tanto para anterior como para posterior em relação ao plano oclusal do modelo tanto para o articulador semi-ajustável do tipo arcon como para o não-arcon. O trabalho sugere que pequenas inclinações do garfo de mordida não comprometem a tomada do arco facial e sua transferência para articuladores semi-ajustáveis.
During the process teaching/learning in Dentistry, the occurrence of adverse inclinations of the bite fork concerned to maxillary occlusal plane of patients are current during the face-bow taking performed by students. This study evaluated the influence of the inclinations of bite fork to anterior and posterior related to oclusal plane on mounting of the maxillary cast in arcon and nonarcon semiadjustable articulators. Twenty casts of the maxillary arch from twenty patients were obtained, on which two points were marked: one on the vestibular edge of the right canine and another on the vestibular edge of mesiovestibular cusp of the right first molar. The records in the bite fork were made in three positions: the bite fork parallel to the castss plane occlusal, inclined to anterior and to posterior (both 5°). Each position was repeated five times, being the articulator/face-bow set fixed in special support for photographic register. Each photograph was introduced in Auto CAD program, resulting in lines of references for the collection of five measures (one angular and four linear). The data were subjected to statistical analysis parametric (Analysis of Variance). The results showed no significant statistical difference for inclinations of the bite fork to both anterior and to posterior related to the castss occlusal plane for the arcon and nonarcon semiadjustable articulators. The work suggests that small inclinations of bite fork do not compromise the face-bow taking and its transfer for the semiadjustable articulators.
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Hascoët, Nicolas. "Méthodes pour l'interprétation automatique d'images en milieu urbain." Thesis, Evry, Institut national des télécommunications, 2017. http://www.theses.fr/2017TELE0004/document.

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Cette thèse présente une étude pour l'interprétation automatique d'images en milieu urbain. Nous proposons une application permettant de reconnaître différents monuments au sein d'images représentant des scènes complexes. La problématique principale est ici de différencier l'information locale extraite des points d'intérêt du bâtiment recherché parmi tous les points extraits de l'image. En effet, la particularité d'une image en milieu urbain vient de la nature publique de la scène. L'objet que l'on cherche à identifier est au milieu de divers autres objets pouvant interférer avec ce dernier. Nous présentons dans une première partie un état de l'art des méthodes de reconnaissance d’images en se concentrant sur l'utilisation de points d'intérêts locaux ainsi que des bases de données pouvant être employées lors des phases d'expérimentation. Nous retenons au final le modèle de sac de mots (BOW) appliqué aux descripteurs locaux SIFT (Scale-Invariant Feature Transform). Dans un second temps nous proposons une approche de classification des données locales faisant intervenir le modèle de machine à vecteurs de support (SVM). L'intérêt présenté dans cette approche proposée est le faible nombre de données requises lors de la phase d'entraînement des modèles. Différentes stratégies d'entraînement et de classification sont exposées ici. Une troisième partie suggère l'ajout d'une correction géométrique de la classification obtenue précédemment. Nous obtenons ainsi une classification non seulement de l'information locale mais aussi visuelle permettant ainsi une cohérence géométrique de la distribution des points d'intérêt. Enfin, un dernier chapitre présente les résultats expérimentaux obtenus, notamment sur des bâtiments de Paris et d'Oxford
This thesis presents a study for an automatic interpretation of urban images. We propose an application for the retrieval of different landmarks in images representing complex scenes. The main issue here is to differentiate the local information extracted from the key-points of the desired building from all the points extracted within the entire image. Indeed, an urban area image is specific by the public nature of the scene depicted. The object sought to be identified is fused within various other objects that can interfere. First of all, we present a state of the art about image recognition and retrieval methods focusing on local points of interest. Databases that can be used during the phases of experimentation are also exposed in a second chapter. We finally retain the Bag of Words modèle applied to local SIFT descriptors. In a second part, we propose a local data classification approach involving the Support Vector Machine model. The interest shown with this proposed approach is the low number of data required during the training phase of the models. Different training and classification strategies are also discussed. A third step suggests the addition of a geometric correction on the classification obtained previously. We thus obtain a classification not only for the local information but also for the visual information allowing thereby a geometric consistency of the points of interest. Finally, a last chapter presents the experimental results obtained, in particular involving images of buildings in Paris and Oxford
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Books on the topic "BoBW model"

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Young, Gordon J. A sensitivity analysis of the hydrology of the Bow Valley above Banff, Alberta using the UBC watershed model: Phase II. S.l: s.n., 1998.

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Svec, Henry Adam. American Folk Music as Tactical Media. NL Amsterdam: Amsterdam University Press, 2017. http://dx.doi.org/10.5117/9789462984943.

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American folk music has long presented a problematic conception of authenticity, but the reality of the folk scene, and its relationship to media, is far more complicated. This book draws on the fields of media archaeology, performance studies, and sound studies to explore the various modes of communication that can be uncovered from the long American folk revival. From Alan Lomax's cybernetic visions to Bob Dylan's noisy writing machines, this book retrieves a subterranean discourse on the concept of media that might help us to reimagine the potential of the networks in which we work, play, and sing.
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Bob and the model railway. [Place of publication not identified]: BBC, 2004.

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Henry, Mizer Robert. Bob Mizer. AMG: 1000 Model Directory. TASCHEN, 2016.

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Editions, Insight. IncrediBuilds - Star Wars: Boba Fett's Slave-1 3D Wood Model. Insight Editions, 2017.

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Memoirs of a Bow Belle. The Pentland Press, 1995.

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Buchler, Justin. A Unified Spatial Model of Congress. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190865580.003.0004.

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This chapter presents a unified model of legislative elections, parties, and roll call voting, built around a party leadership election. First, a legislative caucus selects a party leader who campaigns based on a platform of a disciplinary system. Once elected, that leader runs the legislative session, in which roll call votes occur. Then elections occur, and incumbents face re-election with the positions they incrementally adopted. When the caucus is ideologically homogeneous, electorally diverse, and policy motivated, members will elect a leader who solves the collective action problem of sincere voting with “preference-preserving influence.” That leader will threaten to punish legislators who bow to electoral pressure to vote as centrists. Consequently, legislators vote sincerely as extremists and get slightly lower vote shares, but they offset that lost utility with policy gains that they couldn’t have gotten without party influence. Party leaders will rarely pressure legislators to vote insincerely.
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Editions, Insight, and Michael Kogge. IncrediBuilds - Star Wars: Boba Fett's Slave-1 Deluxe Book and Model Set. Insight Editions, 2017.

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Saunders, Diane L., and R. F. Bob Raymond. Bow to Stern: How to Build a Model Ship from Scratch. Independently Published, 2019.

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Art of Bob Mackie. Simon & Schuster, Limited, 2021.

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Book chapters on the topic "BoBW model"

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Ren, Reede, John Collomosse, and Joemon Jose. "A BOVW Based Query Generative Model." In Lecture Notes in Computer Science, 118–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-17832-0_12.

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Bernsmed, Karin, Christian Frøystad, Per Håkon Meland, Dag Atle Nesheim, and Ørnulf Jan Rødseth. "Visualizing Cyber Security Risks with Bow-Tie Diagrams." In Graphical Models for Security, 38–56. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-74860-3_3.

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Glattfelder, James B. "The Bow-Tie Model of Ownership Networks." In Decoding Complexity, 121–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33424-5_5.

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Zhang, Gaoming, Jinfu Yang, Shanshan Zhang, and Fei Yang. "Image Classification Based on Modified BOW Model." In Advances in Intelligent Systems and Computing, 337–45. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-38771-0_33.

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Šafránková, J., Z. Němeček, and M. Borák. "Bow Shock Position: Observations and Models." In Interball in the ISTP Program, 187–201. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4487-2_14.

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Raga, A. C., K. H. Böhm, and M. Mateo. "Bow Shock Models of Herbig-Haro Objects." In Circumstellar Matter, 185–86. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3887-8_51.

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Arulmozhi, P., and S. Abirami. "Learning Visual Word Patterns Using BoVW Model for Image Retrieval." In Advances in Intelligent Systems and Computing, 489–98. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3874-7_46.

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Wierenga, P. C., and L. Lie-a-Huen. "18 Bow-tie-model: instrument voor analyse van risico’s." In Praktijkboek patiëntveiligheid, 241–45. Houten: Bohn Stafleu van Loghum, 2006. http://dx.doi.org/10.1007/978-90-368-1100-2_18.

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Almousa, Omar, Sebastian Mödersheim, and Luca Viganò. "Alice and Bob: Reconciling Formal Models and Implementation." In Programming Languages with Applications to Biology and Security, 66–85. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25527-9_7.

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Mansourian, Leila, Muhamad Taufik Abdullah, Lilli Nurliyana Abdullah, Azreen Azman, and Mas Rina Mustaffa. "BoVW Model for Animal Recognition: An Evaluation on SIFT Feature Strategies." In Advances in Visual Informatics, 227–36. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25939-0_20.

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Conference papers on the topic "BoBW model"

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Zhang, Haibing, Shirong Liu, and Chaoliang Zhong. "Outdoor scene understanding using SEVI-BOVW model." In 2014 International Joint Conference on Neural Networks (IJCNN). IEEE, 2014. http://dx.doi.org/10.1109/ijcnn.2014.6889778.

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Jiang, Lin, Jinhai Liu, Huaguang Zhang, and Kexin Xu. "MFL Data Feature Extraction based on KPCA-BOMW Model." In 2019 Chinese Control And Decision Conference (CCDC). IEEE, 2019. http://dx.doi.org/10.1109/ccdc.2019.8832515.

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Changpeng, Ji, Tong Tingting, and Dai Wei. "Dialectal Speech Emotion Recognition Based on the BOGW-KNN Model." In 2023 IEEE 3rd International Conference on Electronic Technology, Communication and Information (ICETCI). IEEE, 2023. http://dx.doi.org/10.1109/icetci57876.2023.10176564.

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Lu, Chao, Han Xiang, Dakui Feng, and Weihua Deng. "Study on the Effect of Twin Bow Shape on Ship Resistance Performance." In ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/omae2022-78951.

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Abstract Bow shape affects the waterline inlet angle, waterline length and waterline area, which is significantly affected the ship performance. The structured overlapping grid technique is used to generate the whole computational domain for the towed resistance simulation. A new type of ship bow called ‘twin ship bow’ is designed to decrease the ship resistance. A high-speed ship is taken as the research object. By changing the bow profile of ships, several ship models with different bow filling rate are studied. The numerical simulation of ship resistance with different bow shape is carried out by using in-house URANS code. The SST k-ω turbulence model is employed to close the governing equation, and the finite difference method (FDM) is used for discretization. Before the towed resistance simulation, the grid and time step convergence study are carried out to obtain the numerical uncertainty, which proves the reliability of the numerical method. By comparing the resistance performance of ship models with different bow shape, the effect of bow shape on resistance performance is studied, and the results proved that the ‘twin ship bow’ can decrease the ship resistance.
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Stern, F., J. Longo, and Z. J. Zhang. "Detailed Bow-Flow Data and CFD of a Series 60 CB= .6 Ship Model for Froude Number 0.316." In SNAME 24th American Towing Tank Conference. SNAME, 1995. http://dx.doi.org/10.5957/attc-1995-031.

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The bow flow of the Series 60 CB 0. 6 ship model is reinvestigated using both experiments and CFD. More detailed bow-flow data is obtained by taking measurements of the wave elevation with a point gauge very near the bow. In the CFD, the bow flow is resolved in more detail by using the real bow geometry instead of the simplified vertical zero-thickness bow used in previous studies, which requires a much finer grid in the bow region. The experiments and CFD are briefly described; results are presented; and discussions are made concerning comparisons of the new and old CFD solutions with the extended data regarding the wave profile and elevation at the bow, the thin film and beads (i.e. attached spray sheet and bow vortices), and the stagnation effects. Finally some concluding remarks are made.
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Ina´cio, Octa´vio, Lui´s Henrique, and Jose´ Antunes. "Simulation of the Oscillation Regimes of Bowed Bars: A Nonlinear Modal Approach." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32415.

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It is still a challenge to properly simulate the complex stick-slip behavior of multi-degree-of-freedom systems. In the present paper we investigate the self-excited nonlinear responses of bowed bars, using a time-domain modal approach, coupled with an explicit model for the frictional forces, which is able to emulate stick-slip behavior. This computational approach can provide very detailed simulations and is well suited to deal with systems presenting a dispersive behavior. The effects of the bar supporting fixture are included in the model, as well as a velocity-dependent friction coefficient. We present the results of numerical simulations, for representative ranges of the bowing velocity and normal force. Computations have been performed for constant-section aluminum bars, as well as for real vibraphone bars, which display a central undercutting, intended to help tuning the first modes. Our results show limiting values for the normal force FN and bowing velocity y˙bow, for which the “musical” self-sustained solutions exist. Beyond this “playability space”, double period and even chaotic regimes were found for specific ranges of the input parameters FN and y˙bow. As also displayed by bowed strings, the vibration amplitudes of bowed bars also increase with the bow velocity. However, in contrast to string instruments, bowed bars “slip” during most of the motion cycle. Another important difference is that, in bowed bars, the self-excited motions are dominated by the system first mode. Our numerical results are qualitatively supported by preliminary experimental results.
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Farooq, Javeria. "Object detection and identification using SURF and BoW model." In 2016 International Conference on Computing, Electronic and Electrical Engineering (ICE Cube). IEEE, 2016. http://dx.doi.org/10.1109/icecube.2016.7495245.

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Kudo, Nami, Kazunari Tsuda, Hiroshi Ito, Sachuronggui Bao, Yasushi Motai, Mizuki Nakajima, and Hiroshi Hashimoto. "Factor analysis of graceful bow based on skeleton model." In 2015 Conference on Technologies and Applications of Artificial Intelligence (TAAI). IEEE, 2015. http://dx.doi.org/10.1109/taai.2015.7407097.

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Williams, K. A., I. H. White, F. R. Laughton, J. Sarma, R. V. Penty, I. Middlemast, T. Ryan, and J. S. Roberts. "Passive mode-locking of Bow-Tie lasers." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.ctul2.

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High-energy compact picosecond pulse sources are required for applications as varied as LIDAR, free space communications, spectroscopy, and the pumping of nonlinear optical systems. Bow-Tie diode lasers offer an economic source for higher power, spatially monomode light, overcoming many of the limitations that are imposed by gain saturation in conventional narrow stripe lasers.1 Under Q-switched operation, for example, record 100 pJ, 15 ps pulses have already been generated.2
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Ward, L. W. "Sailboat Bow Impact Stresses." In SNAME 7th Chesapeake Sailing Yacht Symposium. SNAME, 1985. http://dx.doi.org/10.5957/csys-1985-002.

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A study is made of the dynamic stresses due to water impact forces on the bow sections of offshore racing sailing yachts going to windward using an unsteady model of a pressure loading travelling across a beam. Results show a decided reduction compared to the static loading solution where the load travel rate is rapid and for large unsupported spans. The latter is compared to recent proposed changes in the American Bureau of Shipping (A.B.S.) Scantling Rules and some qualitative agreement is found. Recommendations for future investigations are made.
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Reports on the topic "BoBW model"

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Cusanelli, Dominic S. Joint High Speed Sealift (JHSS) Baseline Shaft & Strut (Model 5653) Series 1: Bare Hull Resistance, Appended Resistance, and Alternative Bow Evaluations. Fort Belvoir, VA: Defense Technical Information Center, August 2007. http://dx.doi.org/10.21236/ada472920.

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Beshouri, Greg. PR-309-14212-WEB Field Demonstration of Fully Integrated NSCR System. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), September 2019. http://dx.doi.org/10.55274/r0011623.

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Wednesday, October 9, 2019 3:30 pm. ET PRESENTER: Bob Goffin, Advanced Engine Technologies HOST: Chris Nowak, Kinder Morgan MODERATOR: Gary Choquette, PRCI CLICK THE DOWNLOAD/BUY BUTTON TO ACCESS THE WEBINAR REGISTRATION LINK While superficially a "simple and proven" technology, non-selective catalytic reduction (NSCR) control is in fact extremely complex, far more complex than the control of lean burn engines. Using a systems approach, PRCI research partners defined the most common failure modes for each of the components of the NSCR system. Both regulators and operators often make simplistic assumptions regarding the reliability and robustness of NSCR control. Real world experience has shown those assumptions to be unfounded. Legacy NSCR systems can go "out of compliance" resulting in gross emissions deviations while remaining "in control." This webinar will review the reasons for those deviations and then postulates a system design capable of remaining both "in control" and "in compliance." This system was then designed, developed, installed and tested. The results confirmed the theoretical analysis resulting in satisfactory system performance. The result offers regulators and operators guidelines on procuring and/or developing NSCR systems that will satisfy regulatory expectations. Learning outcomes/Benefits of attending include: - Explains for legacy rich burn engines can be upgraded with NSCR and advanced controls - Explores the instrumentation required - Looks at control algorithms involved Who should attend: - Pipeline operators - Reliability engineers and technicians - Emissions compliance specialists Recommended pre-reading: PR-309-14212-R01 Field Demonstration of Fully Integrated NSCR System Not able to attend? Register anyway to automatically receive a link to the webinar recording to view on-demand at your convenience. Attendance is limited to the first 500 registrants to join the webinar. All remaining registrants will receive a link to view the webinar recording. After registering, you will receive a confirmation email containing information about joining the webinar.
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