From a GF(q) sequence {a(i)}(i greater than or equal to 0) with period q(n)-1 we can obtain new periodic sequences {(a) over cap(i)$}(i greater than or equal to 0) with period q(n) by inserting one symbol b is an elem...
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From a GF(q) sequence {a(i)}(i greater than or equal to 0) with period q(n)-1 we can obtain new periodic sequences {(a) over cap(i)$}(i greater than or equal to 0) with period q(n) by inserting one symbol b is an element of GF(q) al the end of each period. Let b(0) = Sigma(i=0)(qn-2) a(i). It is first shown that the linear complexity of {<(a)over cap(i)>}(i greater than or equal to 0), denoted as LC({(a) over cap(i)$}), satisfies LC({(a) over cap(i)$}) = q(n) if b not equal -b(0) and LC({(a) over cap(i)$}) less than or equal to q(n)-1 if b = -b(0). Most of known sequences are shown to satisfy the zero sum property i.e., b(0) = 0. For such sequences satisfying b(0) = 0 it is shown that q(n)-LC({a(i)}) less than or equal to LC({(a) over cap(i)$}) less than or equal to q(n)-1 if b = 0.
A practical structural representation of a segmented image is presented. The practicalness is defined according to whether or not: the representation can be directly generated from its corresponding segmented image. T...
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A practical structural representation of a segmented image is presented. The practicalness is defined according to whether or not: the representation can be directly generated from its corresponding segmented image. Two structural representations have been proposed in the literature. They are hierarchical structure and relational graph. Because they are defined totally on the basis of human perception, neither of the representations can be directly generated from the corresponding segmented image. The structural representation described in this paper, however, is based on the relations among pattern primitives and generated by applying some human-oriented constraints.
A clustering-based approach to the separation of text from mixed text/graphics documents is presented. The approach starts from the grouping of connected components. Clustering is employed at three critical stages to ...
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This work explores hand-eye coordination of robots by using a camera with functions of zooming and focusing. Under the guidance of the camera, a robot hand can arrive at an object to manipulate it in the 3D space. The...
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This work explores hand-eye coordination of robots by using a camera with functions of zooming and focusing. Under the guidance of the camera, a robot hand can arrive at an object to manipulate it in the 3D space. The hand movement is decomposed into the move parallel to the image plane and the move in depth, which are controlled from image position and focus value of the hand. The focal value is put on the destination object and the hand move in depth tries to increase the image sharpness of the hand. The zooming, focusing, and 2D image position control cooperate with each other and work in feedback fashion. The fovea control of eye realized by zooming from wide-angle to tele-angle brings both flexibility and accuracy in locating hand position.
This paper compares the performance of an indoor cellular system in terms of capacity and channel assignment delay for different dynamic channel assignment (DCA) and fixed channel assignment (FCA) schemes. We refer to...
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This paper compares the performance of an indoor cellular system in terms of capacity and channel assignment delay for different dynamic channel assignment (DCA) and fixed channel assignment (FCA) schemes. We refer to specific group of DCAs, namely channel segregation and reuse partitioning. Our main concern is to show that these DCA schemes offer better performance than FCA. Since the structure and floor layout of a building will have a major influence on the propagation and hence on the cell shape, a path loss simulator (operating in the 2.5 GHz band) is developed for predicting the path loss which is used in evolving base station layouts. computer simulation, based on Monte Carlo method, are carried out using the path loss values and the base station layouts. The results indicate that increased traffic capacity can be achieved with all DCAs in comparison with FCA. The highest capacity and a shorter channel assignment delay are delivered by self-organized reuse partitioning DCA scheme.
This work aims at building 3D graphics models of objects using multiple visual cues. Different materials and shapes may yield different visual cues such as corner, pattern, highlight, and contour on objects. These cue...
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ISBN:
(纸本)0780332806
This work aims at building 3D graphics models of objects using multiple visual cues. Different materials and shapes may yield different visual cues such as corner, pattern, highlight, and contour on objects. These cues may have similar appearance in the images, extracted as edge, peak and shading. To obtain a correct shape, different shape recovery methods must be applied to those features separately. We rotate an object and take a dense image sequence. In each epipolar plane image of rotation plane, we classify visual cues according to their image characteristics and motion behavior, and integrate shapes from different algorithms. Features are classified when they pass through a series of modules which first identify distinct features and then reasoning ambiguous features in reference to the identified ones. A carefully considered strategy is proposed and experiments on real objects.
This paper deals with a digital adaptive control method for a manipulator mounted on a space robot after it captures an unknown object. Most control methods are based on the supposition that all physical parameters of...
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This paper deals with a digital adaptive control method for a manipulator mounted on a space robot after it captures an unknown object. Most control methods are based on the supposition that all physical parameters of the space robot are known. However, if the end-effector catches an unknown object, the physical parameters of the robot are changed, and the control performance deteriorates. In this paper, the authors propose two types of digital adaptive control algorithm using a discretized kinematic equation. computer simulation was used to make it clear that the control performance can be improved by using either of the proposed methods.
This paper proposes a hybrid quasi-ARMAX modeling and identification scheme for nonlinear systems. The idea is to incorporate a group of certain nonlinear nonparametric models (NNMs) into a linear ARMAX structure. Par...
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ISBN:
(纸本)0780335902
This paper proposes a hybrid quasi-ARMAX modeling and identification scheme for nonlinear systems. The idea is to incorporate a group of certain nonlinear nonparametric models (NNMs) into a linear ARMAX structure. Particular effort is made to find a better compromise to the trade-off between the model flexibility and the simplicity for estimation by using knowledge information efficiently. As the result, we obtain a model equipped with a linear ARMAX structure, flexibility and simplicity. The effectiveness and usefulness of the proposed hybrid model are examined by applying it to identification and control of nonlinear systems.
Assembly Instruction Manuals usually consist of both explanation and illustration. An expart who has rich knowledge on mechanical assemblies is able to under stand illustration without reading explanation. It is, how ...
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Assembly Instruction Manuals usually consist of both explanation and illustration. An expart who has rich knowledge on mechanical assemblies is able to under stand illustration without reading explanation. It is, how ever, difficult for a novice to read an instruction manual without referring to both of them. People may probably read explanation and see illustration alternately. It is difficult to model the human method because switching between two processes depends on knowledge level. In this paper, a method is proposed as the first version for integrating interpretation by both explanation and illustration.
An algorithm for finding the unequal error protection (UEP) capability of a q-ary image of a low-rate q(m)-ary cyclic code is presented by combining its concatenated structure with the UEP capability of concatenated c...
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An algorithm for finding the unequal error protection (UEP) capability of a q-ary image of a low-rate q(m)-ary cyclic code is presented by combining its concatenated structure with the UEP capability of concatenated codes. The results are independent of a choice of a basis to be used for expanding an element over GF (q(m)) into GF (q). A table of the UEP capability of binary images of low-rate Reed-Solomon codes over GF(2(6)) is given. It is shown that the encoding and decoding algorithms for superimposed concatenated codes can be applied to a q-ary image as a linear UEP code.
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