Spelling suggestions: "subject:"nonpoint"" "subject:"nonjoint""
71 |
Point of view : mind-mapWikner, Filippa January 2018 (has links)
Min essä är en mind-map av konstverket, I see no God up here (2018)
|
72 |
Intelligent point of sale terminal thesisKeown, Harvey January 1991 (has links)
Thesis (Masters Diploma (Electrical Engineering) -- Cape Technikon, Cape Town,1991 / The main reason for this project was "import replacement", as all
our existing Point of Sale and Electronic Equipment had to be
imported from Japan. After the Government I s steps to curb imports
by placing extremely high levies on imported goods, it was
decided to produce a completely local product.
From past experience it was obvious that customer requirements
varied greatly. This gave rise to the inception of a modular
system, enabling the customer to "mix and match" modules to their
requirements.
The"concept is to use a HOST computer controlling a differential
communications line with a maximum of 255 terminals which are all
individually addressable. Each individual terminal would in turn
control an internal differential communications line, called
PNET, which is an acronym for "Peripheral Network".
A decision was made to make all the peripherals intelligent,
thereby alleviating the processor of all menial tasks. All
peripherals local to the terminal would be connected to this
network. The configuration can be seen graphically by refering
to Figure 0-1. The communications protocol used is more
sophisticated than that used for RS232 devices. The protocol has
a POLL - ACKNOWLEDGE structure, where the HOST has complete
control of the loop.
|
73 |
Point-of-gaze estimation in three dimensionsHennessey, Craig 11 1900 (has links)
Binocular eye-gaze tracking can be used to estimate the point-of-gaze (POG)
of a subject in real-world three-dimensional (3D) space using the vergence
of the eyes. In this thesis, a novel non-contact, model-based technique for
3D POG estimation is presented. The non-contact system allows people to
select real-world objects in 3D physical space using their eyes, without the
need for head-mounted equipment. Using a model-based POG estimation
algorithm allows for free head motion and a single stage of calibration. The
users were free to naturally move and reorient their heads while operating
the system, within an allowable headspace of 3.2 x 9.2 x 14 cm. A rela
tively high precision, as measured by the standard deviation of the 3D POG
estimates, was measured to be 0.26 cm and was achieved with the use of
high speed sampling and digital filtering techniques. When observing points
in a 3D volume, large head and eye rotations are far more common than
when observing a 2D screen. A novel corneal reflection pattern matching
algorithm is presented for increasing image feature tracking reliability in the
presence of large eye rotations. It is shown that an average accuracy of 3.93
cm was achieved over seven different subjects and a workspace volume of 30
x 23 x 25 cm (width x height x depth). An example application is presented
illustrating the use of the 3D POG as a human computer interface in a 3D
game of Tic-Tac-Toe on a 3 x 3 x 3 volumetric display. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate
|
74 |
Fixed point theorems for point-to-set mappingsKo, Hwei-Mei January 1970 (has links)
Let f be a point-to-set mapping from a topological X
space X into the family 2(X) of nonempty closed subsets of X . K. Fan [13] proved that if X is a Hausdorff locally convex linear topological space and K is a nonempty compact convex subset of X , then an upper semicontinuous mapping (abbreviated by u.s.c.) f from K into k(K), the family of nonempty closed convex subsets of K, has a fixed point in K . Our main object in this work is to weaken "compactness"
of K to "weak compactness" and prove a fixed point theorem for a mapping f on K into certain subfamily of 2(K).
The definition of convex function has been extended to point-to-set mappings in Chapter I. Let I denote the identity mapping on a Banach space X. Assume that I-f is a convex mapping on a weakly compact closed convex subset K of X. Then any of the following conditions implies the existence of the fixed point of f on K:
(1) f : K → 2(K) is u.s.c. and [formula omitted] d(x,f(x)) = 0.
(2) f : K → 2(K) is u.s.c. and is asymptotically regular (see definition 1.3) at some point in K .
(3) f : K → cc(K) is nonexpansive and the Banach space X has a strictly convex norm.
Moreover, it has been shown that if f : K → cpt(K) (see definition 0.3) is nonexpansive and I-f is strictly convex (see definition 1.5) on K, then K has a fixed point on K . Finally, an effort has been made to investigate the properties of the set of fixed points of a point-to-set mappings.
In Chapter II, we have confined ourselves to a reflexive Banach space X which has a weakly continuous duality map J (see definition 2.3) and X has a strictly convex norm. On such a special space we are able to prove that a nonexpansive mapping f : X → cc(X) such that f(x)ʗ K, for any x in a closed convex bounded subset K of X , has a fixed point. As an application of this result we prove a fixed point theorem for semicontractive mappings (see definition 2.7). F : X → cc(X) such that F(x)ʗK for any x ε K , where K and X are the same as above. .
In the last Chapter, we have proved that if f is strictly nonexpansive on a.Banach space X into cpt(X) and if there is x(o) ε X such that [formula omitted] has a subsequence convergent to a set A ε cpt(X) under the Hausdorff metric D on cpt(X), then f has a fixed point in A . Furthermore we prove that a nonexpansive mapping f : K → cpt(K), where K is a weakly compact convex subset of a metrizable locally convex linear topological space X, has a fixed point in K, provided that a constant k > 0 exists such that the set E(x) = {y ε K ; d(x,y) ≥ kd(y,f(y))} is nonempty and convex and the mapping E : K → k(K), with E(x) defined above, is weakly locally closed (see definition 3.1). Finally the comparisons of the continuities of a point-to-set mapping have been made. / Science, Faculty of / Mathematics, Department of / Graduate
|
75 |
Elasticity Parameter Estimation in a Simple Measurement SetupTekieh, Motahareh January 2013 (has links)
Elastic deformation has wide applications in medical simulations, therefore when it comes to designing physical behavior of objects for realistic training applications, determining material parameters so that objects behave in a desired way becomes a crucial. In this work we consider the problem of elasticity parameter estimation for deformable bodies, which is important for accurate medical simulations.
Our work has two major steps: the first step is the data acquisition and preparation, and the second step is the parameter estimation. The experimental setup for data acquisition consists of depth and force sensors. Surface deformations are acquired as a series of images along with the corresponding applied forces. The contact point of the force sensor on the surface is found visually and the corresponding applied forces are acquired directly from the force sensor. A complete mesh deformation which is obtained from a surface tracking method is employed along with force measurements in the elasticity parameter estimation method.
Our approach to estimate the physical material properties is based on an inverse linear finite element method. We have experimented with two approaches to optimize the elasticity parameters: a linear iterative method and a force-displacement error minimization method. The two methods were tested on the simulation data, and the second method was tested on three deformable objects. The results are presented for the data captured by two different depth sensors. The result is a set of two parameters, the Young's modulus and the Poisson's ratio, which represents the stiffness of the object under test.
|
76 |
The critical behaviour of ethylene and hydrogenDe Bruyn, John Roy January 1987 (has links)
Optical techniques have been used to study the behaviour of ethylene and hydrogen near their liquid-vapour critical points. From measurements of the coexistence curve of ethylene over the reduced temperature range 1.5 x 10⁻⁶ < t < 4.5 x 10⁻², where t — (Tc — T)/Tc and Tc is the critical temperature, we find the critical exponent β = 0.327±.002 and the corrections-to-scaling exponent ∆ = 0.46±.02. Similar measurements for hydrogen over the range 3.2 x 10⁻⁵ < t < 7.0 x 10⁻² give β = 0.326 ± .002 and ∆ = 0.46 ± .02. Measurements of the compressibility of hydrogen give the critical exponent [Formula Omitted] = 1.19 ± .05 and the critical amplitude ratio [Formula Omitted] = 5.2 ± .4. With the exception of ∆, which is slightly lower than its predicted
value of 0.5, the results for these universal quantities are in agreement with theoretical predictions.
The leading coexistence curve amplitude for hydrogen, B₀ = 1.19±.03, is lower than the corresponding values for ethylene, B₀ = 1.56 ± .03, and for other room-temperature fluids. This decrease is in qualitative agreement with the predictions of a theory of quantum effects on critical behaviour. Measurements of the coexistence curve diameter for both fluids show an anomaly near the critical point having a form consistent with the predicted t¹⁻α temperature dependence. These results are in agreement with a recent theory of the effects of many-body forces on the diameter; the hydrogen data indicate that these forces are attractive in that fluid. This suggests that quantum mechanical exchange interactions are important near the critical point of hydrogen. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
|
77 |
On Continuity of Functions Defined on Unrestricted Point SetsWilson, Ural 08 1900 (has links)
This thesis is concerned with an investigation of the generalizations of continuous real functions of a real variable. In particular, the relationship between uniform continuity and ordinary continuity is concerned. The concept of uniform continuity was first introduced by Heine about 1900.
|
78 |
A Relation for Point Sets in a Topological SpaceWarndof, Joseph C. 08 1900 (has links)
The purpose of this thesis is to investigate the relation Z for point sets in a topological space. There were two original goals which caused the study.
|
79 |
Interferometric determination of diffusion coefficients : binary liquid mixtures near their critical mixing pointHung, Doan Manh January 1976 (has links)
No description available.
|
80 |
Interfacial tension and viscosity in ternary systems near the locus of critical pointsSimonsen, Hans Iver January 1977 (has links)
No description available.
|
Page generated in 0.0279 seconds