Deriving Lane-level Insight from GPS Data: Innovations for Traffic & Autonomous Driving

With the on-going disruption of the transportation industry and rapid advancement in ITS technologies; emerging smart cities, navigation systems and autonomous transportation, the need for highly accurate geospatial localization has never been more crucial. These technologies demand that we have more granular location information of vehicles not just on a road, but to a specific lane on the road. This presentation will give a pedagogical style summary and overview of some of the on-going research work at HERE Technologies and how we have pushed the state-of-the-art in lane-localization of noisy GPS probe data using novel Machine Learning Algorithms and how some of these innovations is being applied to power new products for real-time traffic, routing and navigation systems, maps for autonomous vehicles, incidents and safety services. An example of such product is Split Lane Traffic (SLT) Split Lane Traffic (SLT) detects divergent traffic speeds at highway junctions with exit ramps. It is the first traffic product that provides lane maneuver guidance information to drivers based on lane-level traffic conditions ahead thereby giving better navigation experience and a more accurate routing and ETA.https://pdxscholar.library.pdx.edu/trec_seminar/1167/thumbnail.jp

Chemical Bonding in Molecules and Complexes Containing d-Elements Based on DFT

Summary.: Metal-ligand bonding in transition metal halide molecules and complexes with different central ions, oxidations states, and coordination numbers: CrIIIX63−, CrIVX4, CrIIX2 (X = F,Cl,Br,I), MIIICl63−(M = Mo,W), MIII(H2O)63+(M = Cr,Co) and Re2Cl82− has been studied in terms of the Extended Transition State (ETS) energy patitioning scheme within the DFT and electron density analysis (the Laplacian of the electron density and the electronic localization function). Bonding is found to be dominated by ionicity in all cases, especially so for complexes with higher coordination numbers. Covalent contributions to the metal-ligand bond are found to be mainly due to the nd-electrons and to lesser extent due to the metal (n + 1)s and (n + 1)p-orbitals, contributions from (n+1)s increasing when going to lower coordination numbers. Metal-ligand bonding analysis have been used in order to check some concepts emerging from ligand field theory when applied to the spectroscopy and magnetism of transition metal complexes. It is pointed out that for complexes of high symmetry (MX6, Oh, MX4, Td, and MX2, D∞h) electron density analyses gain interpretative power when partitioned into contributions from occupied orbitals of different symmetr

Pade Approximants And One Of Its Applications

This thesis is concerned with a brief summary of the theory of Pade approximants and one of its applications to Finance. Proofs of most of the theorems are omitted and many developments could not be mentioned due to the vastness of the field of Pade approximations. We provide reference to research papers and books that contain exhaustive treatment of the subject. This thesis is mainly divided into two parts. In the first part we derive a general expression of the Pade approximants and some of the results that will be related to the work on the second part of the thesis. The Aitken\u27s method for quick convergence of series is highlighted as Pade[L/1] . We explore the criteria for convergence of a series approximated by Pade approximants and obtain its relationship to numerical analysis with the help of the Crank-Nicholson method. The second part shows how Pade approximants can be a smooth method to model the term structure of interest rates using stochastic processes and the no arbitrage argument. Pade approximants have been considered by physicists to be appropriate for approximating large classes of functions. This fact is used here to compare Pade approximants with very low indices and two parameters to interest rates variations provided by the Federal Reserve System in the United States

Density functional theory study of the Jahn-Teller effect in cobaltocene

A detailed discussion of the potential energy surface of bis(cyclopentadienyl)cobalt(II), cobaltocene, is given. Vibronic coupling coefficients are calculated using density functional theory (DFT). Results are in good agreement with experimental findings. On the basis of our calculation there is no second-order Jahn-Teller (JT) effect as predicted by group theory. The JT distortion can be expressed as a linear combination of all totally symmetric normal modes of the low-symmetry, minimum-energy conformation. The out-of-plane ring deformation is the most important mode. The JT distortion is analyzed by seeking the path of minimal energy of the adiabatic potential energy surfac

Hydrological balance of the Boura dam (Burkina Faso)

In developing countries, where many basins are ungauged or poorly gauged, small reservoirs could be used as hydrometric stations for estimating runoff of small watersheds upstream of the dams. Thus, hydrological monitoring of dam is essential in water resources management by predicting where there may be shortages or surplus water

Modelisation de la Dynamique du Trait de Cote sur une Portion de la Cote Ouest Cameroun Allant de Batoke a Seme Beach par Imagerie Landsat de 1979 a 2018

The general objective of this study is to contribute to the actual and future acknowledging of the coastline dynamics of a portion of the WestCameroon coast using Landsat satellite images 3, 7 and 8 from 1979 to 2018. To achieve this objective, the images were pre-treated through atmospheric corrections using the ENVI 5.1 software, which enabled the digitalization of the coastlines of the study zone in the different images using the ArcGIS version 10.1 software and then the statistical computation of the speeds of evolution of the coastline at different dates was done using DSAS version 4.3. The main results obtained show two evolutionary trends of coastal linear interest: in the long term, the study has given a decline in the coastline of an annual average rate equal to -1.09 m/year between 1979 and 2018 and in the medium term, the study shows an advance of the coastline with an average speed of evolution equal to +0.75 m/year between 2000 and 2018. In the same period, the zone experienced a short-term constant erosion between 2000-2005 and 2005-2008 with an average rate of -1.12 m/year, a slight stability between 2008 and 2012 with a speed of -0.08 m/year, while from 2012 to 2016 it has undergone an average evolution of +2.44 m/year. A forecast of the phenomenon in 2028 has given a coastline position of 10.90 m compared to its current position, which could jeopardize hotel infrastructure such as: Seme Beach Hotel; Madison Beach; Etisah Beach and the fishing camps of Batoké village during episodes of high tide. La présente étude a pour objectif général de contribuer à la connaissance actuelle et future de la dynamique du trait de côte d’une portion de la côte Ouest-camerounaise à l’aide des images satellitaires Landsat 3, 7 et 8 de 1979 à 2018. Pour atteindre cet objectif, les images ont subi un prétraitement à travers des corrections atmosphériques à l’aide du logiciel ENVI 5.1; ce qui a permis la digitalisation destraits de côtes de la zone d’étude contenus dans les différentes images à l’aide du logiciel ArcGIS version 10.1 puis le calcul statistique des vitesses d’évolution du trait de côte à différentes date s’est effectué à l’aide de DSAS version 4.3. Les principaux résultats obtenus nous montrent deux tendances évolutives du linéaire côtier d’intérêt : sur le long terme, l’étude a donné un recul du trait de côte d’un taux moyen annuel égal à -1,09 m/an entre 1979 et 2018 et à moyen terme, l’étude montre une avancée du trait de côte avec une vitesse moyenne d’évolution égale à +0,75 m/an entre 2000 et 2018. Dans cette même période, la zone a connu à court terme une situation constante d’érosion entre 2000-2005 et 2005-2008 avec un taux moyen de -1,12 m/an, une légère stabilité entre 2008 et 2012 avec une vitesse de -0,08 m/an, tandis que de 2012 à 2016, elle a subi un engraissement en moyenne de +2,44 m/an. Une prévision du phénomène en 2028 a donné une position du trait de côte de 10,90 m par rapport à sa position actuelle, ce qui pourrait mettre en péril des infrastructures hôtelières telles que : Seme Beach Hôtel ; Madison Beach ; Etisah Beach et les campements des pêcheurs du village Batoké pendant les épisodes de marées de vives eaux

Importance des Parametres Hydrodynamiques dans la Repartition Spatiale des Sediments Superficiels des Plages de Limbe (Sud-Ouest Cameroun)

This paper contributes to the determination of the importance of the hydrodynamic parameters acting on the Limbe coast (South-West Cameroon) using the particle size analysis of surface sediments of the beaches. In achieving this objective, two sediment sampling campaigns on the beaches of Batoke and Debundscha respectively were carried out along 8 radials perpendicular to the shoreline. For each radial, three samples were taken respectively at the three geomorphological units. From the beach, a total of 24 samples were taken for particle size analysis and sedimentometry in the laboratory. The main results obtained show that the superficial sediments of the Batoke beaches are mainly characterized by sediments of the class of fine sands. They are very well classified and their distribution is almost symmetrical towards the end. On the other hand, the beach of Debundscha is characterized by a predominance of medium sands sediments. Also, they are very well classified and their distribution is asymmetric towards coarse. From a hydrodynamic point of view, this granulometric distribution of sediments shows that Batoke and Debundscha beaches are mostly transported by constant energy swells with very low currents. Compared to the Batoke site, Debundscha has more severe swell conditions. The estimated tidal range (RTR = 3.01) which is greater than 1 during the study period indicates that tidal currents dominate wave-generated currents. Thus, this indicates that the tide may be the only responsible parameter for the spatial distribution of sediment on the two beaches.La présente étude contribue à la détermination de l’importance des paramètres hydrodynamiques agissant sur la côte de Limbe (Sud-ouest Cameroun) à l'aide de l'analyse granulométrique des sédiments superficiels des plages. Pour atteindre cet objectif, deux campagnes de prélèvements de sédiments respectivement sur les plages de Batoke et Debundscha ont été effectuées le long de 8 radiales perpendiculaires à la ligne de rivage, pour chaque radiale, trois prélèvements ont été effectués respectivement au niveau des trois unités géomorphologiques de la plage soit au total 24 échantillons ont été prélevés pour des analyses granulométriques et sédimentométries au laboratoire. Les principaux résultats obtenus nous montrent que les sédiments superficiels des plages de Batoke sont majoritairement caractérisés par des sédiments de la classe des sables fins, très bien classés et dont la distribution est presque symétrique vers les fins tandis que la plage de Debundscha est caractérisée par une prédominance des sédiments de la classe des sables moyens, très bien classés et dont la distribution est asymétrique vers les grossiers. Du point de vu hydrodynamique, cette répartition granulométrique des sédiments montre que les plages de Batoke et Debundscha sont majoritairement transportés par les houles à énergie constante dont les courants sont très faibles mais par rapport au site de Batoké, Debundscha présente des conditions de houle plus importante. Le paramètre de marnage évalué (RTR=3,01) supérieur à 1 durant la période d'étude montre que les courants de marée dominent sur les courants générés par la houle traduisant ainsi que la marée pourrait être le paramètre majoritairement responsable de la répartition spatiale des sédiments sur ces deux plages