1,720,979 research outputs found
ANALYSIS OF MIMO MECHANICAL SYSTEMS USING THE VECTORIAL 4 POLE PARAMETER METHOD
No full textFormulas are derived to predict the frequency response characteristics of a multiple-input/multiple-output (MIMO) linear system consisting of several subsystems by using those of each subsystem. The method is called here the vectorial four pole parameter technique, since the basic concept and procedure are the same as for the conventional (scalar) four pope parameter method for a single-input/single-output (SISO) system. Compatibility of the formulas with Newtonian mechanics is confirmed by two examples: one system constructed by two subsystems in series and another system in parallel. Since two poles are defined under clamped conditions while the other two poles are under free boundary conditions, it is often difficult in practice to measure all of the four poles directly from an excitation test. A method of indirect estimation of the two poles defined under boundary conditions which are difficult to realize is presented, in which the reciprocity and transmissibility theorems are used. Experimental results for a beam structure with two-input and two-output connections are presented as an illustration of the vectorial four pole parameter approach
A Simple Method to Predict Frequency Response Functions of Mechanical Structures Assembled in Series or Parallel
No full text
CONTEXT-DEPENDENT SEARCH IN INTERCONNECTED HIDDEN MARKOV MODEL FOR UNCONSTRAINED HANDWRITING RECOGNITION
No full textViewing a handwritten word as an alternating sequence of characters and ligatures, we proposed a circularly interconnected network of hidden Markov models to model handwritten English words of indefinite length. The recognition problem is then regarded as finding the most probable path in the network for a given input. For the search, Viterbi algorithm is applied with lexicon lookup. To overcome directional sensitivity of the path search, a back-tracking technique is employed that keeps plausible path candidates dynamically within limited storage space
Network-based approach to online cursive script recognition
No full textThe idea of combining the network of HMM's and the dynamic programming-based search is highly relevant to online handwriting recognition. The word model of HMM network can be systematically constructed by concatenating letter and ligature HMM's while sharing common ones. Character recognition in such a network can be defined as the task of best aligning a given input sequence to the best path in the network. One distinguishing feature of the approach is that letter segmentation is obtained simultaneously with recognition but no extra-computation is required
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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