Novel concept of feedback linearization is introduced for smooth asymptotic stabilization of underactuated spacecraft equipped with one and two degrees of actuation. The concept is based on generalized inversion, and is aimed at asymptotically realizing a perturbation from the unrealizable feedback linearizing transformation. A desired stable second-order linear dynamics in a norm measure of th...

S U M M A R Y A disadvantage of fully non-linear methods of inversion, through exploitation of the properties of model space, is the absence of a well-developed framework for error assessment. To rectify this problem an auxiliary weighting function for ensemble properties is introduced that can be used with suitable thresholds to define consistency regions of suitable models. This approach requ...

This paper discusses different approaches to language acquisition in relation to children's acquisition of word order in wh-questions in English and Norwegian. While generative models assert that children set major word order parameters and thus acquire a rule of subject-auxiliary inversion or generalized verb second (V2) at an early stage, some constructivist work argues that English-speaking ...

Calibration of groundwater models is frequently hampered by limited availability hydrogeological data. Non-intrusive geophysical methods are increasingly used to provide higher spatio-temporal resolution datasets for identification hydrological processes and estimation hydraulic properties. In model calibration performed through joint or coupled hydrogeophysical inversion, the supplemented with...

The generalized dynamic inversion control methodology is applied to the spacecraft attitude trajectory tracking problem. It is shown that the structure of the skew symmetric cross product matrix alleviates the need to include the inertia matrix in the control law. Accordingly, the proposed control law depends solely on attitude and angular velocity measurements, and it neither requires knowledg...

We address the challenge of automatically generating questions from reading materials for educational practice and assessment. Our approach is to overgenerate questions, then rank them. We use manually written rules to perform a sequence of general purpose syntactic transformations (e.g., subject-auxiliary inversion) to turn declarative sentences into questions. These questions are then ranked ...

In this paper, a new bidirectional neural network for better acoustic-articulatory inversion mapping is proposed. The model is motivated by the parallel structure of human brain, processing information by having forward-inverse connections. In other words, there would be a feedback from articulatory system to the acoustic signals emitted from that organ. Inspired by this mechanism, a new bidire...

Cross-linguistically, there are three grammatical devices to process the question mark j+Whi: the reduplication of certain elements in the predicate, Subject-Auxiliary Inversion, and the use of question particles. Also cross-linguistically, there are two devices for grammar to process the focus mark (+Focus]: the fronting of focused constituents and the insertion of a . Focus Marker such as the...

Kim, Jong-Bok. 2013. On the Existence of Small clauses in English. English Language and Linguistics 19.1, 67-88. The existence of small clauses (NPPredicate sequence as a constituent) has been rather controversial: there are arguments for and against the postulation of the SC in the English grammar. In this paper, we discuss phenomena where the NP-Predicate sequence forms a constituent and acce...