Refine
Year of publication
- 2013 (236) (remove)
Document Type
- Article (unreviewed) (68)
- Conference Proceeding (59)
- Article (reviewed) (34)
- Bachelor Thesis (23)
- Book (18)
- Part of a Book (11)
- Contribution to a Periodical (5)
- Other (5)
- Patent (4)
- Master's Thesis (3)
Conference Type
- Konferenzartikel (42)
- Konferenz-Abstract (10)
- Sonstiges (3)
- Konferenz-Poster (2)
- Konferenzband (2)
Language
- German (142)
- English (93)
- Other language (1)
Keywords
- Kommunikation (7)
- Bildung (5)
- Energieversorgung (5)
- Management (5)
- Dünnschichtchromatographie (4)
- Kardiale Resynchronisationstherapie (4)
- Schule (4)
- Biogas (3)
- Elektrokardiogramm (3)
- Fallstudie (3)
Institute
- Fakultät Elektrotechnik und Informationstechnik (E+I) (bis 03/2019) (90)
- Fakultät Medien und Informationswesen (M+I) (bis 21.04.2021) (74)
- Fakultät Maschinenbau und Verfahrenstechnik (M+V) (56)
- INES - Institut für nachhaltige Energiesysteme (26)
- Fakultät Wirtschaft (W) (15)
- IUAS - Institute for Unmanned Aerial Systems (8)
- POIM - Peter Osypka Institute of Medical Engineering (5)
- Rektorat/Verwaltung (2)
- CRT - Campus Research & Transfer (1)
- Zentrale Einrichtungen (1)
Open Access
- Closed Access (84)
- Open Access (64)
- Bronze (11)
- Closed (3)
- Gold (1)
Die Analyse von Engpässen im Güterverkehr ist eine wichtige Voraussetzung, um zukünftige Heraus-forderungen der Infrastrukturplanung und Logistik bewältigen zu können. Im Rahmen des EU-Projekts Code24 sollen Strategien für die Behandlung zukünftiger Herausforderungen im Schienengüterverkehr im wichtigsten europäischen Güterverkehrskorridor Rotterdam-Genua entwickelt werden. Hierfür sind Infor-mationen über Zugzahlen und die Kapazitätsauslastung auf einzelnen Streckenabschnitten eine wichtige Voraussetzung.
The paper proposes a system architecture for charging infrastructure that serves the requirements of future fleets of shared-use electric vehicles in urban scenarios. The focus of the development is on the interfaces to central stakeholders such as mobility service providers, distribution network operators and utilities. The main concept of the proposed system is the adherence to a stringent resource-oriented design approach, following the design principles of the Representational State Transfer (REST) architectural software style for distributed systems. This design approach is used from the cloud-based services down to the implementation of the charging infrastructure's control algorithms. Focusing on the resources of the various entities simplifies the implementation of their interactions, compared to the explicit declaration of services that are available. The system design ensures that the charging infrastructure is open to all users and generates a benefit beyond basic charging operations. Integration in emerging smart markets is done via open web-based interfaces. These allow for the generation of an added value of concrete services for shared-use electric mobility. A link to the field of grid operation is proposed using the ISO/IEC 61850 telecontrol standard. The smart meter capabilities of the charging stations can be used to gain additional information on the current state of the distribution grid. As an exemplary service a load management service for a fleet of shared-use electric vehicles is going to be implemented.
Researchers are developing new GNSS receivers and antennas based on an innovative signal-processing scheme to significantly improve GNSS tracking reliability and accuracy under degraded signal conditions. It is based on the principles of synthetic-aperture radar. Like in a multi-antenna phased array receiver, GNSS signals from different spatial locations are combined coherently forming an optimized synthetic antenna-gain pattern. The method is implemented in a real-time PC-based software receiver and works with GPS, GLONASS, and Galileo signals. Multiple frequencies are generally supported. The idea of synthetic-aperture processing is realized as a coherent summation of correlation values of each satellite over the so-called beamforming interval. Each correlation value is multiplied with a phase factor. For example, the phase factor can be chosen to compensate for the relative antenna motion over the beam-forming interval and the resulting sum of the scaled correlation values represents a coherent correlation value maximizing the line of sight signal power.
High-precision signal processing algorithm to evaluate SAW properties as a function of temperature
(2013)
This paper presents a signal processing algorithm which accurately evaluates the SAW properties of a substrate as functions of temperature. The investigated acoustic properties are group velocity, phase velocity, propagation loss, and coupling coefficient. With several measurements carried out at different temperatures, we obtain the temperature dependency of the SAW properties. The analysis algorithm starts by reading the transfer functions of short and long delay lines. The analysis algorithm determines the center frequency of the delay lines and obtains the delay time difference between the short and long delay lines. The extracted parameters are then used to calculate the acoustic properties of the SAW material. To validate the algorithm, its accuracy is studied by determining the error in the calculating delay time difference, center frequency, and group velocity.
Background: Increasing awareness of the importance of evidence-based medicine is demonstrated not only by an increasing number of articles addressing it but also by a specialty-wide evidence-based medicine initiative. The authors critically analyzed the quality of reporting of randomized controlled trials published in this Journal over a 21-year period (1990 to 2010).
Methods: A hand search was conducted, including all issues of Plastic and Reconstructive Surgery from January of 1990 to December of 2010. All randomized controlled trials published during this time period were identified with the Cochrane decision tree for identification of randomized controlled trials. To assess the quality of reporting, a modification of the checklist of the Consolidated Standard of Reporting Trials Statement was used.
Results: Of 7121 original articles published from 1990 to 2010 in the Journal, 159 (2.23 percent) met the Cochrane criteria. A significant increase in the absolute number of randomized controlled trials was seen over the study period (p < 0.0001). The median quality of these trials from 1990 to 2010 was "fair," with a trend toward improved quality of reporting over time (p = 0.127).
Conclusions: A favorable trend is seen with respect to an increased number of published randomized controlled trials in Plastic and Reconstructive Surgery. Adherence to standard reporting guidelines is recommended, however, to further improve the quality of reporting. Consideration may be given to providing information regarding the quality of reporting in addition to the "level of evidence pyramid," thus facilitating critical appraisal.
Raman spectra from three different binary gasoline-ethanol blends (with ratios 95:5, 90:10, and 85:15) have been obtained by using a low-cost, frequency precise Fourier-transform Raman spectrometer (FT-Raman) prototype. The spectral information is presented in the range of 0 to 3500 cm-1 with a resolution of 1.66 cm-1, which is greater than the required for most liquid and solid chemical samples. This set-up delivers spectral information about the sample with a reduced spectral deviation compared to theoretical values (less than 0.4 cm-1 without compensation for instrumental response). The robust and highly fexible FT-Raman prototype presented for the spectral analysis, consisting mainly of a Michelson interferometer and a self-designed photon counter, is able to deliver high resolution and frequency precise Raman spectra from the gasoline-ethanol blends comparable to the obtained by using commercial devices. This FT-Raman set-up does not need additional complex hardware or software control and relies on re-sampling and interpolation algorithms. The qualitative spectral information obtained has been used to calculate the proportion of gasoline and ethanol present in the used chemical samples without using extra calibrations methods or chemical markers.
MPC-Workshop Februar 2013
(2013)
MPC-Workshop Juli 2013
(2013)