In this thesis, the Recursive-Random Sample Consensus (R-RANSAC) algorithm is applied to a vision-based, cooperative target tracking system. Unlike previous applications, which focused on a single camera platform tracking targets in the image frame, this work uses multiple camera platforms to track targets in the inertial or world frame. The process of tracking targets in the inertial frame is commonly referred to as geolocation.In practical applications sensor biases cause the geolocated target estimates to be biased from truth. The method for cooperative estimation developed in this thesis first estimates the relative rotational and translational biases that exist between tracks from different vehicles. It then accounts for the biases and performs the track-to-track association, which determines if the tracks originate from the same target. The track-to-track association is based on a sliding window approach that accounts for the correlation between tracks sharing common process noise and the correlation in time between individual estimation errors, yielding a chi-squared distribution. Typically, accounting for the correlation in time requires the inversion of a Nnx x Nnx covariance matrix, where N is the length of the window and nx is the number of states. Note that this inversion must occur every time the track-to-track association is to be performed. However, it is shown that by making a steady-state assumption, the inverse has a simple closed-form solution, requiring the inversion of only two nx x nx matrices, and can be calculated offline. Distributed data fusion is performed on tracks where the hypothesis test is satisfied. The proposed method is demonstrated on data collected from an actual vision-based tracking system.A novel method is also developed to cooperatively estimate the location and size of occlusions. This capability is important for future target tracking research involving optimized path planning/gimbal pointing, where a geographical map is unavailable. The method is demonstrated in simulation.

The topic of my thesis is to study the complex reconstruction of the locomotive servicing depot Praha Liben. The locomotive depot is both operational maintenance and repair trains. The section reconstruction begins in turnout number 1, the whole area locomotive depot will be reconstructed. The main task is to propose an exchange of stepped old construction turnout for turnout new one in the whole area of the depot. The total number of changed points is 27. Depot demolition tasks in order to extend the track number 10 on the minimum usable effective length of 105 meters is the other task. Establishment of two dead-end tracks number 15 and 17 will be extend to an effective length of 105 metres. Retaining wall with PU componentsis designed along track 17. The next task is to solve the drainage area. The area will be drained interconnected system drains into the sewer and trench walls.

The diploma thesis applies to under sleeper pads. It researches thein using and benefits in foreign railvway authorities. Further it assesses track geometrical parameters in the trial track section with under sleeper pads in track Havlíčkův Brod - Okrouhlice and in the railway station Planá nad Lužnicí. There were evaluated measurements of vertical alingnment rails by precise leveling and deviations of track geometrical parameters measured by track meusuring car in the diploma thesis.There is expressed an conclusion about the impact of under sleeper pads on track geometric data in the thesis.

Utbyggnaden av spårvägen Linje 7 i Stockholm som ska utmynna i Spårväg City har tagit sin början. Vilka typer av spårvägskonstruktioner som ska användas på alla de ingående sträckorna är däremot inte bestämt. Grässpår är ett alternativ, men kunskapen om grässpår är inte stor i Stockholmsregionen på grund av att denna spårvägstyp tidigare inte projekterats i regionen. Denna rapport ska underlätta valet genom informationshämtning från intervjuer, möten, mejlkontakt, studiebesök och litteraturstudier. Grässpåret jämförs med gatuspår i asfalt som används i Spårväg City. Ballastspår på egen banvall är den enklaste spårvägskonstruktionen, och används i jämförelserna. Dock kommer den konstruktionen inte att användas på Spårväg City. De olika spårvägskonstruktionerna jämförs utifrån anläggningskostnader samt underhållskostnader för de olika konstruktionstyperna. En grundlig jämförelse har även gjorts byggtekniskt. Vid jämförelsen av de olika konstruktionerna så var gatuspår i asfalt den dyraste att anlägga, cirka 20 000kr/m. Det var mer än 3 gånger så dyrt som grässpåret med en kostnad på cirka 6000kr/m, som i sin tur var marginellt dyrare än ballastspåret på egen banvall med en kostnad på cirka 3000kr/m. Även underhållskostnaden var betydligt högre för gatuspåret i asfalt. Gatuspåret i asfalt var nästan dubbelt så dyrt som grässpåret att underhålla. Grässpåret i sin tur var lite mer än dubbelt så dyrt som ballastspåret på egen banvall att underhålla. Gatuspåret i asfalt fick en underhållskostnad på cirka 160 000 kr/km & år, grässpåret fick en underhållskostnad på cirka 85 000kr/km & år, och för ballastspår på egen banvall cirka 40 000kr/km & år. / The extension of the tramway line 7 in Stockholm, which will culminate in “Spårväg City”, has begun. Which types of tramway constructions to use on all the included distances has not been decided. Grass Track is an option, but there’s a lack of knowledge of the grass track in Stockholm because this type of tramway has not been projected before in the region. This report will simplify the selection, by information extraction from interviews, meetings, e-mail contact, field trips and literature studies.  The grass track will be compared with street track in asphalt which is used in “Spårväg City”. Ballast track on its own embankment is the simplest tramway construction, and is used in the comparisons. However, the design is not to be used on “Spårväg City”. The various tramway constructions are compared by the construction costs and the maintenance costs for the different construction types. A thorough comparison has also been made in the construction technical part.  When comparing the different constructions, it was the street track in asphalt that was the most expensive to construct about 20 000kr/m. It was more than 3 times as expensive as the grass track with a cost of about 6000kr/m, which in turn was marginally more expensive than the ballast track on its own embankment with a cost of about 3000kr/m. Even the maintenance cost was significantly higher for street track in asphalt. The street track in asphalt was almost twice as expensive as the grass track to maintain. The grass track in turn was a little more than twice as expensive as the ballast track on its own embankment to maintain. The street track in asphalt had a cost of about 160 000kr/km & year, the grass track had a cost of about 85 000kr/km & year, and the ballast track on its own embankment had a cost of about 40 000kr/km & year.

The aim of this master’s thesis is the design of railway junction from high-speed rail RS1 Bohumín – Přerov to railway station Hranice na Moravě at a speed 160 of kph. The design has been developed with minimisation of land occupation and the minimisation of engineering structures. The next aim is the design of two pairs of railroad switch on the high-speed rail. Part of the thesis is the design of the railway substructure, railway superstructure and track drainage.

Typescript (photocopy). / Digitized by Kansas Correctional Industries

This thesis describes the construction of a sea surface temperature (SST) dataset from Along-Track Scanning Radiometer (ATSR) observations suitable for climate applications. The algorithms presented here are now used at ESA for reprocessing of historical ATSR data and will be the basis of the retrieval used on the forthcoming SLSTR instrument on ESA’s Sentinel-3 satellite. In order to ensure independence of ATSR SSTs from in situ measurements, the retrieval uses physics-based methods through the use of radiative transfer (RT) simulations. The RT simulations are based on the Reference ForwardModel line-by-line model linked to a new sea surface emissivity model which accounts for surface temperature, wind speed, viewing angle and salinity, and to a discrete ordinates scattering (DISORT) model to account for aerosol. An atmospheric profile dataset, based on full resolution ERA-40 numerical weather prediction (NWP) data, is defined and used as input to the RTmodel. Five atmospheric trace gases (N2O, CH4, HNO3, and CFC-11 and CFC-12) are identified as having temporal and geographical variability which have a significant (∼0.1K) impact on RT simulations. Several additional trace gases neglected in previous studies are included using fixed profiles contributing ∼0.04K to RT simulations. Comparison against ATSR-2 and AATSR observations indicates that RT model biases are reduced from 0.2–0.5K for previous studies to ∼0.1K. A new coefficient-based SST retrieval scheme is developed from the RT simulations. Coefficients are banded by total column water vapour (TCWV) from NWP analyses reducing simulated regional biases to <0.1K compared to ∼0.2K for global coefficients. An improved treatment of the instrument viewing geometry decreases simulated view-angle related biases from ∼0.1K to <0.005K for the day-time dual-view retrieval. To eliminate inter-algorithmbiases due to remaining RT model biases and uncertainty in the characterisation of the ATSR instruments the offset coefficient for each TCWV band is adjusted to match the results from a reference channel combination. As infrared radiometers are sensitive to the skin SST while in situ buoys measure SST at some depth below the surface an adjustment for the skin effect and diurnal stratification is included. The samemodel allows adjustment for the differing time of observation between ATSR-2 and AATSR to prevent the diurnal cycle being aliased into the final record. The RT simulations are harmonised between sensors using a double-difference technique eliminating discontinuities in the final SST record. Comparison against in situ drifting and tropical moored buoys shows the new SST dataset is of high quality. Systematic differences between ATSR retrieved SST and in situ drifters show zonal, regional, TCWV, and wind speed biases are less than 0.1K except for themost extreme cases (TCWV <5 kgm−2). The precision of ATSR retrieved SSTs is ∼0.15 K, lower than the precision ofmeasurement of the global ensemble of in situ drifting buoys. From 1995 onwards the ARC SSTs are stable with instability of less than 5mK year−1 to 95% confidence (demonstrated for tropical regions).

International Telemetering Conference Proceedings / November 04-07, 1991 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Recorders conforming to IRIG Standards have served the data recording community well for many years. Initially, most systems were analog in nature, recording data in either direct or FM modes but as the need for digital recording developed, the IRIG recorder was successfully adapted for this purpose by the addition of formatting and coding sub-systems to form the High Density Digital Recorder (HDDR). Today, user requirements for higher speed, higher capacity and more convenient systems have presented equipment designers with new challenges in terms of the correct choice of technology and system architecture. It is not surprising that system designers should turn for inspiration first to the very high speed transverse and helical products which had been developed for the broadcast industry since these technologies possess many of the attributes necessary for a high rate digital data recorder. It is unfortunate that it has now become a truism that the only logical progression from the longitudinal IRIG system is by means of rotary technology. Recent developments in a technology known as micro-track recording now call this assumption into question. Recording systems based on micro-track technology are available and others are in an advanced state of development, and these offer a costeffective, attractive and low risk alternative to rotary systems for both high rate data capture and tape mass storage applications.

In the presented research we propose to improve on historically accepted radiobiological models via Monte Carlo simulation of radiation tracks passing through a cell nucleus modeled with up-to-date subnuclear structures. This is performed by generating a radiation track database using the Monte Carlo code, Geant4-DNA, that simulates radiation interactions at the nanometer scale of DNA. These tracks are called upon from the database and intersected with a cell nucleus model that incorporates DNA-containing structures. This allows for a Monte Carlo simulation of how DNA double strand breaks are produced by radiation. The results can be used to correlate to many experimentally observed biological endpoints, e.g. chromosome aberrations as well as cell death.

International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / Orbiting satellites can be tracked by following preprogrammed ephemeris data in the ground station controller. This tracking method is advantageous, because of the reduced acquisition cost of non-autotracking receiver and antenna feed components. Further, widely separated frequency bands can readily be tracked, without the complexity of a frequency specific auto-track system. Two types of mobile tracking systems are described. They are composed of elevation-over-azimuth-over-tilt and of an X-Y axis pedestal configuration. The calibration methods for establishing time and geographical references are discussed, as well as the challenges of minimizing the effects of system and environment induced error contributors.