Högskolan i Skövde

his.sePublications
Change search
Refine search result
1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • apa-cv
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Broberg, Patrik
    et al.
    University West, Trollhättan, Sweden.
    Runnemalm, Anna
    University West, Trollhättan, Sweden.
    Sjödahl, Mikael
    University West, Trollhättan, Sweden.
    Improved corner detection by ultrasonic testing using phase analysis2013In: Ultrasonics, ISSN 0041-624X, E-ISSN 1874-9968, Vol. 53, no 2, p. 630-634Article in journal (Refereed)
    Abstract [en]

    In ultrasonic testing, corners are used for sensitivity calibration in the form of notches, for measuring the sound velocity in the material, and as known reference points during testing. A 90° corner will always reflect incoming waves in the opposite direction due to a double reflection and therefore give a strong echo. This article presents a method for separating the echo from a corner from other echoes and more accurately find the position of the corner. The method is based on analysing the phase of the reflected signal. The proposed method was tested on a steel calibration block and the width of the indication was reduced by up to 50% compared to the amplitude signal. This results in a more accurate positioning of the corner. Using the phase instead of the amplitude will also improve the reliability, since reflections other than from corners will disappear.

  • 2.
    Ericson, Stefan
    et al.
    University of Skövde, School of Technology and Society.
    Åstrand, Björn
    Halmstad University, Sweden.
    Algorithms for visual odometry in outdoor field environment2007In: RA '07: Proceedings of the 13th IASTED International Conference on Robotics and Applications / [ed] Klaus Schilling, ACTA Press, 2007, p. 414-419Conference paper (Refereed)
  • 3.
    Kharrazi, Sogol
    et al.
    Statens väg- och transportforskningsinstitut, Förare och fordon, FOF.
    Atif, Yacine
    University of Skövde, School of Informatics. University of Skövde, Informatics Research Environment. Högskolan i Skövde.
    Sustainable smart-parking management for connected and autonomous vehicles2020Report (Other academic)
    Abstract [en]

    Traffic induced by parking-spot seekers is a growing challenge and constitutes a considerable portion of the traffic in city centers. New opportunities to solve this problem are emerging by connected vehicles and infrastructure. For instance, ultrasonic and magnetic sensors are already mounted on the ceiling of many parking lots to detect the availability of a parking spot. These sensors can provide parking spot availability information in real-time. Further, traffic-aware smart sensors which can detect the movement of individual vehicles are also available in many city and highway areas. This report suggests an algorithm for a cloud-based parking service that exploits these streams of data to choose the best parking lot in a given parking area.

    The parking seeking problem is subject to a range of criteria that may include user, municipality and parking operator preferences. Users may have some preferences with respect to walking distance to destination. Municipalities prefer to spread the traffic to reduce congestion in the urban core. Parking operators seek to maximize parking lot utilization in order to increase the revenue on real-estate investments. To solve this problem, an optimization algorithm based on multicriteria decision making process is used.

    The proposed SmartPark algorithm employs a discrete Markov-chain model to demystify the future state of a parking lot. The algorithm features three modular sections:

    • First, a search process is triggered to identify the expected arrival time periods to all parking lots in the targeted parking area. This process utilizes smart pole data streams reporting congestion rates across the targeted parking area.

    • Then, a predictive analytics phase uses consolidated historical data about past parking dynamics to infer a state transition matrix, showing the transformation of available spots in a parking lot over short periods of time.

    • Finally, this matrix is projected against similar future seasonal periods to predict the actual vacancy of a parking lot at the arrival time.

    Download full text (pdf)
    FULLTEXT01
  • 4.
    Luz Gámiz, María
    et al.
    Department of Statistics and O.R., University of Granada, Spain.
    Kalén, Anton
    University of Skövde, School of Informatics. University of Skövde, Informatics Research Environment. Universidade de Vigo, Pontevedra, Spain.
    Nozal-Cañadas, Rafael
    Department of Computer Science, UiT-The Artic University of Norway, Tromso, Norway.
    Raya-Miranda, Rocío
    Department of Statistics and O.R., University of Granada, Spain.
    Statistical supervised learning with engineering data: A case study of low frequency noise measured on semiconductor devices2022In: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 120, no 9-10, p. 5835-5853Article in journal (Refereed)
    Abstract [en]

    Our practical motivation is the analysis of potential correlations between spectral noise current and threshold voltage from common on-wafer MOSFETs. The usual strategy leads to the use of standard techniques based on Normal linear regression easily accessible in all statistical software (both free or commercial). However, these statistical methods are not appropriate because the assumptions they lie on are not met. More sophisticated methods are required. A new strategy based on the most novel nonparametric techniques which are data-driven and thus free from questionable parametric assumptions is proposed. A backfitting algorithm accounting for random effects and nonparametric regression is designed and implemented. The nature of the correlation between threshold voltage and noise is examined by conducting a statistical test, which is based on a novel technique that summarizes in a color map all the relevant information of the data. The way the results are presented in the plot makes it easy for a non-expert in data analysis to understand what is underlying. The good performance of the method is proven through simulations and it is applied to a data case in a field where these modern statistical techniques are novel and result very efficient.

    Download full text (pdf)
    fulltext
  • 5.
    Mellin, Jonas
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Andler, Sten F.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    The effect of optimizing engine control on fuel consumption and roll amplitude in ocean-going vessels: An experimental study2015Report (Other academic)
    Abstract [en]

    We use data-generated models based on data from experiments of an ocean-going vessel to study the effect of optimizing fuel consumption. The optimization is an add-on module to the existing diesel-engine fuel-injection control built by Q-TAGG R&D AB. The work is mainly a validation of knowledge-based models based on a priori knowledge from physics. The results from a simulation-based analysis of the predictive models built on data agree with the results based on knowledge-based models in a companion study. This indicates that the optimization algorithm saves fuel. We also address specific problems of adapting data to existing machine learning methods. It turns out that we can simplify the problem by ignoring the auto-correlative effects in the time series by employing low-pass filters and resampling techniques. Thereby we can use mature and robust classification techniques with less requirements on the data to demonstrate that fuel is saved compared to the full-fledged time series analysis techniques which are harder to use. The trade-off is the accuracy of the result, that is, it is hard to tell exactly how much fuel is saved. In essence, however, this process can be automated due to its simplicity. 

    Download full text (pdf)
    fulltext
    Download full text (zip)
    fulltext
  • 6.
    Romano, Jacob
    University of Skövde, School of Informatics.
    Igenkänning av ljudalstrande objekt: Med en applikation på modal syntes2017Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Projektet undersökte hur väl människor kan identifiera objekten bakom inspelade impaktljud i jämförelse med modalt syntetiserade sådana. Undersökningen är rotad i forskning kring fysisk modellering av ljud, men även i estetiska och politiska frågor som berörts av andra forskare inom det akademiska och nyckelpersoner i datorspelsbranschen. En kort historia om syntestekniker som använts inom datorspelsbranschen följer. Ett system för modal analys/omsyntes skapades och användes inom ramen av en kvantitativ undersökning. Även ett tillägprogram för Unity presenteras. Resultaten visar på att modalt syntetiserade impaktljud identifieras med en tillförlitlighet som är jämförbar med inspelningar. En diskussion kring procedurella ljudtekniker inom datorspel och deras för- och nackdelar ur estetiska, praktiska och tekniska synvinklar genomförs. Förslag på framtida arbete presenteras, både som kommersiella samt pedagogiska möjligheter.

    Download full text (pdf)
    fulltext
  • 7.
    Sun, Jiong
    et al.
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Billing, Erik
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Seoane, Fernando
    Swedish School of Textiles, University of Borås, Borås, Sweden / Inst. for Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden / Dept. Biomedical Engineering, Karolinska University Hospital, Stockholm, Sweden.
    Zhou, Bo
    German Research Center for Artificial Intelligence, Kaiserslautern, Germany.
    Högberg, Dan
    University of Skövde, School of Engineering Science. University of Skövde, The Virtual Systems Research Centre.
    Hemeren, Paul
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Categories of touch: Classifying human touch using a soft tactile sensor2017Conference paper (Refereed)
    Abstract [en]

    Social touch plays an important role not only in human communication but also in human-robot interaction. We here report results from an ongoing study on affective human-robot interaction. In our previous research, touch type is shown to be informative for communicated emotion. Here, a soft matrix array sensor is used to capture the tactile interaction between human and robot and a method based on PCA and kNN is applied in the experiment to classify different touch types, constituting a pre-stage to recognizing emotional tactile interaction. Results show an average recognition rate for classified touch type of 71%, with a large variability between different types of touch. Results are discussed in relation to affective HRI and social robotics.

    Download full text (pdf)
    fulltext
  • 8.
    Syrén, Felicia
    et al.
    Textile Materials Technology, Department of Textile Technology, Faculty of Textiles, Engineering and Business, University of Borås, Borås, Sweden.
    Li, Cai
    University of Skövde, School of Informatics.
    Billing, Erik
    University of Skövde, School of Informatics.
    Lund, Anja
    Textile Materials Technology, Department of Textile Technology, Faculty of Textiles, Engineering and Business, University of Borås, Borås, Sweden.
    Nierstrasz, Vincent
    Textile Materials Technology, Department of Textile Technology, Faculty of Textiles, Engineering and Business, University of Borås, Borås, Sweden.
    Characterization of textile resistive strain sensors2016Conference paper (Other academic)
  • 9.
    Wang, Jiacheng
    et al.
    University of Skövde, School of Engineering Science.
    Domingos, Luzaisso
    University of Skövde, School of Engineering Science.
    Developing of Data Logging System for Flow Test Station in Industrial Laboratory2016Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    CEJN is a leading transnational company with long history and professional background providing high-tech quick connect products in global market. The headquarters of the com-pany in Skövde, Sweden, is the birthplace and core location of the entire corporation. In the headquarters, the engineer tests their products at their flow test laboratory. In the laboratory, there are flow test stations for all product ranges. Within them, the most basic are flow test benches for air, water and hydraulic oil products. The flow test benches are aim to test the products under International/Swedish standard conditions to determine the performance.

    This project is aimed in upgrading the test benches by engineering both hardware and soft-ware, to achieve higher level of automation of the data logging system used in the lab. All three test benches were designed and installed following requirements in corresponding in-ternational standards. The principles of testing are similar, but they are not developed from the same era, and the automation level of each test bench differs. As a result, the need of up-grading in the benches is different.

    In the laboratory, the recorded test results are reorganized and processed by a report genera-tor developed on Microsoft Excel. The Excel report generator is used for organize test results, calibrate the deviation of the instruments, calculate the flow coefficient of the product, gener-ate performance diagrams of the products, generate test reports for different purpose of use, and save the test data and results on the server of the company.

    Above all, an upgrade of the data logging system for the three flow test benches was needed. Depending on the conditions of each test bench, the project is implemented and designed the following three parts:

    • A hardware upgrading (flow rate computer) for the air flow test benchA new signal indicating device for replacing the old flow rate computer is purchased from Italy by the company. The new instrument contains filter function to stabilize the flow rate value.

    • A software upgrading (Excel report generator) for all the test benchesVisual Basic for Applications (VBA) programming language is used for developing functions such as data communication, signal decoding and user interface developing in Excel.

    • Develop of an automated data visualizing system for the air flow test benchData communication from the new instrument to a PC through serial port and Mod-bus RTU interface is established. The data visualizing function is compiled in the Ex-cel report generator for the air flow test, realized by VBA programming.

    Download full text (pdf)
    Developing of Data Logging System for Flow Test Station in Industrial Laboratory
  • 10.
    Zhou, Bo
    et al.
    German Research Center for Artificial Intelligence, Kaiserslautern, Germany / University of Kaiserslautern, Kaiserslautern, Germany.
    Cruz, Heber Zurian
    German Research Center for Artificial Intelligence, Kaiserslautern, Germany / University of Kaiserslautern, Kaiserslautern, Germany.
    Atefi, Seyed Reza
    Swedish School of Textiles, University of Borås, Borås, Sweden.
    Billing, Erik
    University of Skövde, School of Informatics. University of Skövde, The Informatics Research Centre.
    Seoane, Fernando
    Inst. for Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden / Dept. Biomedical Engineering, Karolinska University Hospital, Stockholm, Sweden / Swedish School of Textiles, University of Borås, Borås, Sweden.
    Lukowicz, Paul
    German Research Center for Artificial Intelligence, Kaiserslautern, Germany / University of Kaiserslautern, Kaiserslautern, Germany.
    TouchMe: Full-textile Touch Sensitive Skin for Encouraging Human-Robot Interaction2017Conference paper (Refereed)
    Download full text (pdf)
    fulltext
1 - 10 of 10
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • apa-cv
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf