Development of spaceborne satellite navigation receivers is a complicated R&D task since Global Satellite Navigation systems were not designed for the user equipment to be placed on board of satellites. this artic...
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ISBN:
(纸本)9785900780696
Development of spaceborne satellite navigation receivers is a complicated R&D task since Global Satellite Navigation systems were not designed for the user equipment to be placed on board of satellites. this article provides the analysis results of the peculiarities of space conditions and its influence on the design of the signal processing. the analysis was carried out for three mission types - geostationary GEO, low-earth orbiting (LEO) and high-elliptic orbits (HEO). Based on the analysis, the requirements for the signal processing in spaceborne receivers are given. Furthermore, software architecture for spaceborne GNSS receivers is suggested, and an original search algorithm is described. the search algorithm belongs to the truncated sequential search algorithms. Several methods of signal search organization are described, each of them satisfies one or more requirements. Approaches for tracking loops design are provided, recommendations for low C/N0 and low throughput CPU are given.
Letter-to-phoneme (L2P) conversion is the process of producing a correct phoneme sequence for a word, given its letters. It is often desirable to reduce the quantity of training data - and hence human annotation- that...
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the growing importance of ontology mapping on the Semantic Web has highlighted the need to manage the uncertain nature of interpreting semantic meta data represented by heterogeneous ontologies. Considering this uncer...
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the growing importance of ontology mapping on the Semantic Web has highlighted the need to manage the uncertain nature of interpreting semantic meta data represented by heterogeneous ontologies. Considering this uncertainty one can potentially improve the ontology mapping precision, which can lead to better acceptance of systemsthat operate in this environment. Further the application of different techniques like computational linguistics or belief conflict resolution that can contribute the development of better mapping algorithms are required in order to process the incomplete and inconsistent information used and produced during any mapping algorithm. In this paper we introduce our system called "DSSim" and describe the improvements that we have made compared to OAEI 2006, OAEI 2007 and OAEI 2008.
the proceedings contain 61 papers. the topics discussed include: detecting regulatory compliance for business process models through semantic annotations;crosscutting concern documentation by visual query of business ...
ISBN:
(纸本)9783642003271
the proceedings contain 61 papers. the topics discussed include: detecting regulatory compliance for business process models through semantic annotations;crosscutting concern documentation by visual query of business processes;detecting intrinsic inefficiency on process level: benchmarking of transactions in banking;a model-driven approach to implementing coordination protocols in BPEL;process mining in healthcare: a contribution to change the culture of blame;a concept for the assessment of electronic communication in integrated information systems;management of knowledge-intensive healthcare processes on the example of general medical documentation;integrating healthcare ontologies: inconsistency tolerance and case study;integrating humans, devices, and events in clinical workflow processes;enhancing web service composition by means of diagnosis;and a framework for dependency based automatic service composition.
Nonlinear dynamical systems are prevalent in systems biology, where they are often used to represent a biological system. this paper deals withthe problem of finding experimental setups that are as "cheap" ...
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ISBN:
(纸本)9780769538235
Nonlinear dynamical systems are prevalent in systems biology, where they are often used to represent a biological system. this paper deals withthe problem of finding experimental setups that are as "cheap" as possible (with respect to some measure) and, at the same time, will allow to identify all the unknown parameters of a nonlinear dynamical system. this is important as often identifiability is assumed - that is, that parameters can be deduced from output data (experimental observations) - and might lead to extensive, repetitive experiments based only on intuition. We present a novel computational approach that provides a minimal set of required observable outputs in order to obtain full parameter identifiability. In other words, we optimise our experimental setup such that we require the observation of only a few outputs while guaranteeing full parameter identifiability. Furthermore, if the observable output function is given then we provide a computational approach to obtain a minimal set of inputs to the system that will provide full parameter identifiability (if such a set exists). Finally, examples from biology are used to further motivate and illustrate our method.
Traditionally computer vision and pattern recognition algorithms are evaluated by measuring differences between final interpretations and ground truth. these black-box evaluations ignore intermediate results, making i...
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ISBN:
(纸本)9783642046667
Traditionally computer vision and pattern recognition algorithms are evaluated by measuring differences between final interpretations and ground truth. these black-box evaluations ignore intermediate results, making it difficult to use intermediate results in diagnosing errors and optimization. We propose "opening the box," representing vision algorithms as sequences of decision points where recognition results are selected from a set of alternatives. For this purpose, we present a domain-specific language for pattern recognition tasks, the Recognition Strategy Language (RSL). At run-time, an RSL interpreter records a complete history of decisions made during recognition, as it applies them to a set of interpretations maintained for the algorithm. Decision histories provide a rich new Source of information: recognition errors may be traced back to the specific decisions that caused them, and intermediate interpretations may be recovered and displayed. this additional information also permits new evaluation metrics that include false negatives (correct hypotheses that the algorithm generates and later rejects), Such as the percentage of ground truth hypotheses generated (historical recall), and the percentage of generated hypotheses that are correct (historical precision). We illustrate the approach through all analysis of cell detection in two published table recognition algorithms.
TDMA-based MAC protocols are considered an energy efficient solution to prolong wireless sensor network lifetime. the topology learning and collection process, together withthe used scheduling scheme, are essential p...
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the use of gas mixtures as replacement to SF6 gas is getting wider acceptance because of environmental issues. Hence, serious efforts are being made to reduce the use of SF6 gas in high voltage application, wherever i...
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ISBN:
(纸本)9781424443666
the use of gas mixtures as replacement to SF6 gas is getting wider acceptance because of environmental issues. Hence, serious efforts are being made to reduce the use of SF6 gas in high voltage application, wherever it is possible. In this direction, use of SF6-N-2 gas Mixtures has been attempted in GITL (Gas insulated Transmission Line) and few other cases. Invariably, in these cases, a small percentage of SF6 gas is used in combination with nitrogen gas and depending upon the requirements of insulation, either the pressure of the gas mixture has to be increased or the percentage of SF6 gas has to be enhanced to meet the specified target of Electric strength. However, irrespective of this, the gas mixture will be Subjected to the problems that are encountered in case of pure SF6 gas. One such serious problem is related to the presence of conducting particles, which may be either fixed or moving in the gas duct. Since the particle size and location can vary, some of the routine dielectric tests may not be sensitive to detect very small particles. Further, detecting a particle in N-2 environment may be more difficult than in SF6 gas because of the lower sensitivity of the gas to particles and the higher operating stresses that exist in SF6 insulated systems. Hence detection of metallic particles and their location is very important from the stand point of safe operation of an insulation system consisting of SF6-N-2 gas mixture.
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