scholarly journals First- and Second-Order Full-Differential in Edge Analysis of Images

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Dong-Mei Pu ◽  
Yu-Bo Yuan
Keyword(s):  
Control Parameter ◽  
Second Order ◽  
Canny Operator ◽  
First Order ◽  
Good Selection ◽  
Pascal Voc ◽  
Uniform Definition ◽  
The Difference ◽  
Basic Ideas ◽  
Selection Of

Two concepts of first- and second-order differential of images are presented to deal with the changes of pixels. These are the basic ideas in mathematics. We propose and reformulate them with a uniform definition framework. Based on our observation and analysis with the difference, we propose an algorithm to detect the edge from image. Experiments on Corel5K and PASCAL VOC 2007 are done to show the difference between the first order and the second order. After comparison with Canny operator and the proposed first-order differential, the main result is that the second-order differential has the better performance in analysis of changes of the context of images with good selection of control parameter.

From First-Order Coherence to Higher-Order Coherence of Synchrotron Radiation

1998 ◽  
Vol 5 (3) ◽  
pp. 305-308 ◽  
Author(s):  
Tsuneaki Miyahara
Keyword(s):  
Synchrotron Radiation ◽  
Free Electron ◽  
Higher Order ◽  
Second Order ◽  
Free Electron Lasers ◽  
First Order ◽  
Noise Characteristics ◽  
The Difference

The difference between first-order and second-order coherence of synchrotron radiation is discussed in relation to how they can be measured and how they affect the noise characteristics of future free-electron lasers.

A Perturbation Analysis of the Wavemaking of a Ship, with an Interpretation of Guilloton’s Method

1975 ◽  
Vol 19 (03) ◽  
pp. 140-148
Author(s):  
F. Noblesse
Keyword(s):  
Approximate Solution ◽  
Free Surface ◽  
Perturbation Analysis ◽  
Order Approximation ◽  
Second Order ◽  
Regular Perturbation ◽  
First Order ◽  
Perturbation Problem ◽  
Sinkage And Trim ◽  
Basic Ideas

A thin-ship perturbation analysis, suggested by Guilloton's basic ideas, is presented. The analysis may be regarded as an application of Lighthill's method of strained coordinates to a regular perturbation problem. An inconsistent second-order approximation in which the Laplace equation is satisfied to first order, and the boundary conditions both at the free surface and on the ship hull are satisfied to second order, is derived. When sinkage and trim, incorporated into the present analysis, are ignored, this approximate solution is shown to be essentially equivalent to the method of Guilloton.

scholarly journals A Survey of Conceptualizations of Politeness

2015 ◽  
Vol 5 (6) ◽  
pp. 115
Author(s):  
Lei Qiu
Keyword(s):  
Second Order ◽  
The Other ◽  
Theoretical Construct ◽  
First Order ◽  
Relational Work ◽  
Other Hand ◽  
Uniform Definition

<p>Along with the general trends of research from traditional Gricean approach to postmodern approach, politeness has been conceptualized as facework, social indexing concept, relational work and interactional work. Based on examination of debates over East group-oriented and Western individual-oriented politeness, first-order and second-order politeness, as well as the universality and relativity of conceptualizations, this paper has roughly demonstrated that the tension between universality and relativity of politeness can help to explain the reason for lack of uniform definition and concept in this field. It is essential for researchers to seek a universal second-order culture-general theoretical construct on one hand, and to look at first-order culture-specific constructs on the other hand.</p>

A Lagrangian solution for internal waves

1985 ◽  
Vol 152 ◽  
pp. 191-202 ◽  
Author(s):  
Brian Sanderson
Keyword(s):  
Internal Waves ◽  
Breaking Waves ◽  
Stratified Fluid ◽  
Second Order ◽  
First Order ◽  
Lagrangian Equations ◽  
Lagrangian Solution ◽  
Lagrangian Coordinate ◽  
Sinusoidal Shape ◽  
The Difference

A perturbation procedure is used to obtain first- and second-order solutions for small-amplitude internal waves in a Lagrangian coordinate system. The first-order Lagrangian equations are formally accurate to the same order as the first-order Eulerian equations; however, they are different and the Lagrangian solution gives a more realistic wave shape. First-order Lagrangian solutions for internal waves in uniformly stratified fluid have a shape similar to that found in the second-order Eulerian solution. Wave profiles in uniformly stratified fluid exhibit broad crests and narrow troughs near the surface, a sinusoidal shape at mid-depth, and narrow crests and broad troughs near the bottom. The difference between the shape of crests and troughs grows as the wave amplitude is increased. Solutions obtained in a uniformly stratified fluid with a small bottom slope yield plausible shapes for breaking waves.

A NEW LOOK AT THE DUAL DEPTH OF INVESTIGATION OF LWD PROPAGATION RESISTIVITY LOGGING

2021 ◽  
Author(s):  
Gong Li Wang ◽  
◽  
Dean Homan ◽  
David Maggs ◽  
David Allen ◽  
...  
Keyword(s):  
Phase Shift ◽  
Eddy Current ◽  
Second Order ◽  
Vertical Resolution ◽  
Shift Measurement ◽  
Attenuation Measurement ◽  
First Order ◽  
Dielectric Effect ◽  
The Difference ◽  
Resistivity Logging

It is well established that phase shift and attenuation measurements acquired by an electromagnetic propagation tool come with different depths of investigation (DOI). The attenuation measurement sees deeper into the formation than the phase shift measurement. This difference has been reported not only for the 2 MHz propagation resistivity tool, but also for the deep propagation tool that operates at 25 MHz. Although the difference has been demonstrated with modeling, test tank experiments and logs, a complete physical explanation has been notably absent since the introduction of the MHz-frequency propagation logging in 1980s. The question is so intriguing that it has been raised repeatedly over the past decades: what drives the difference of DOI for the two measurements that are acquired with the same electromagnetic field? In this paper, we revisit this problem with an aim of providing a physical insight to bridge the gap between theory and application. This is an extension of our recent work on the theory of apparent conductivity for propagation measurements. We address the problem by applying high-order geometric theory for low-frequency electromagnetic problems in lossy media in conjunction with the Taylor series expansion for the voltage ratio measured by a propagation tool. In so doing, we find that in a resistive formation where the dielectric effect is small: 1) the phase shift measurement is primarily due to the first-order eddy current induced in the formation; 2) in contrast, the leading source of the attenuation measurement is the second-order eddy current. Since the second-order eddy current is more spread out than the first-order eddy current, this explains why the DOI of attenuation resistivity is larger than that of phase shift resistivity. The difference in spatial distribution of two eddy currents is also the reason for the difference of vertical resolution between the two. The same root cause for the difference of DOI and vertical resolution also holds when comparing R-signal and X-signal from induction resistivity logging. Other properties shared by propagation and induction resistivity logging will be discussed, such as skin effect and dielectric effect, as well as their asymptotic properties in high-resistivity formations. We conclude that propagation and induction resistivity logging are essentially similar, even though the two measurement principles may seem rather different.

scholarly journals Consistency of Term star: a Statistical Analysis of the Productive Types of System Relations with Related Terminological Units

2020 ◽  
pp. 87-99
Author(s):  
M. N. Latu ◽  
A. A. Levit
Keyword(s):  
Statistical Analysis ◽  
Scientific Knowledge ◽  
Second Order ◽  
Semantic Relations ◽  
Scientific Publications ◽  
Semantic Relationships ◽  
First Order ◽  
Selection Of

The article is devoted to the study of the term as a system unit in its interconnections with contiguous linguistic facts on the example of semantic relations existing in the term star in the field of scientific knowledge “astrophysics”. The study is based on an analysis of the systemic correlation of units in the field of astrophysics. The authors focus on terms representing various categories of concepts in accordance with the nature of the referents they represent. The most and least productive semantic relations are established and analyzed with related first-order terms presented in the definition and second-order terms, the relations with which are represented in the texts of scientific publications outside of the definitions. The categorical pertaining of related terms with which the term star has a systemic relationship is also determined in the study. Using a statistical analysis of a selection of terms in the field of “astrophysics”, we found that the most productive semantic relationships for them are relationships such as generic, attribution, and “part-whole”.

scholarly journals Kajian Wacana Percakapan di Facebook

2018 ◽  
Vol 3 (2) ◽  
pp. 164-176
Author(s):  
M. Afifulloh
Keyword(s):  
Spoken Language ◽  
Second Order ◽  
Written Language ◽  
Everyday Language ◽  
First Order ◽  
The Media ◽  
Discourse Studies ◽  
The Difference ◽  
Internet Networks

There are two types of languages currently used by humans, namely written language and spoken language. These two languages are used separately for different purposes. But in its development, written language and spoken language are used simultaneously so that now the term discussing chatting. This paper attempts to examine the development of these types of languages both from structuralist and functionalist glasses. The two major schools eventually brought this study to the point of problems regarding language, namely discourse. Discourse studies are able to examine languages ranging from words, phrases, clauses, and sentences comprehensively both first order meaning and second order meaning. The result of the study shows that the discourse on Facebook is a different discourse from other forms of discourse. The difference lies in its media, the shape of the text, and the nature of the text. The media is a forum that can be found in cyberspace through computer devices and internet networks. The form of text is in the form of a written conversation between two people or even more. In these conversations between the speaker and the partner do not deal directly but can directly comment, refute, criticize, or approve the opinions of the speaker. The grammatical elements of internet languages are very different which are shown through the structure of the sentence, the presentation of words, and inflection of words. Many choices of words or alphabet that are not everyday language. As an example appears @ (read at), dotcom which is more or less heard by the media

scholarly journals SELECTION OF THE MATHEMATICAL MODEL FOR THE USE OF ENROFLOXACIN IN CATS

2019 ◽  
Vol 7 (4) ◽  
pp. 294-299
Author(s):  
Galya Shivacheva ◽  
Miroslav Vasilev
Keyword(s):  
Differential Equation ◽  
Akaike Information Criterion ◽  
Order Differential Equation ◽  
Information Criterion ◽  
Research Process ◽  
Second Order ◽  
First Order ◽  
Second Order Differential Equation ◽  
The Mathematical Model ◽  
Selection Of

The process of changing the concentration of enrofloxacin in blood plasma in cats after single intravenous injection was identified by three mathematical models - algebraic and two models represented respectively by a first order differential equation and a second order differential equation. In order to select the best model of the three, the Akaike information criterion corrected is used. With the most identification parameters differs the model based on a second-order differential equation. The lowest value of the Akaike information criterion corrected was also obtained with it. This fact gives reason to choose it for the best model for describing the research process.

SELECTION OF THE MATHEMATICAL MODEL FOR THE USE OF ENROFLOXACIN IN CATS

2019 ◽  
pp. 104-109 ◽  
Author(s):  
Galya Shivacheva ◽  
Miroslav Vasilev
Keyword(s):  
Differential Equation ◽  
Akaike Information Criterion ◽  
Order Differential Equation ◽  
Information Criterion ◽  
Research Process ◽  
Second Order ◽  
First Order ◽  
Second Order Differential Equation ◽  
The Mathematical Model ◽  
Selection Of

The process of changing the concentration of enrofloxacin in blood plasma in cats after single intravenous injection was identified by three mathematical models - algebraic and two models represented respectively by a first order differential equation and a second order differential equation. In order to select the best model of the three, the Akaike information criterion corrected is used. With the most identification parameters differs the model based on a second-order differential equation. The lowest value of the Akaike information criterion corrected was also obtained with it. This fact gives reason to choose it for the best model for describing the research process.

scholarly journals DVI ROBERTO T. KRAIGO PRAGMATINĖS KOMUNIKACIJOS METATEORIJOS PROBLEMOS

Problemos ◽  
2009 ◽  
Vol 75 ◽  
pp. 85-93 ◽  
Author(s):  
Kęstutis Kirtiklis
Keyword(s):  
Communication Theory ◽  
Second Order ◽  
Evaluation Criterion ◽  
First Order ◽  
Philosophy Of Communication ◽  
Communication Problems ◽  
Pragmatic Communication ◽  
The Difference ◽  
Universal Communication ◽  
Everyday Communication

Roberto T. Craigo komunikacijos metateorija pasiūlė pragmatinį pagrindą sistematizuoti, tipologizuoti šiuolaikines komunikacijos teorijas bei kurti universalesnę komunikacijos teoriją. Straipsnyje tvirtinama, jog Craigo metateorija remiasi Richardo Rorty neopragmatizmu ir orientuojasi ne į praktines kasdienės komunikacijos problemas, o į bendresnio pobūdžio komunikacijos tarp skirtingų teorinių diskursų klausimą. Būtent iš tokios neopragmatinės laikysenos kyla svarbiausios Craigo komunikacijos metateorijos problemos. Pirma, neįvardytas skirtumas tarp pirmojo ir antrojo laipsnio pragmatinės komunikacijos teorijų. Antra, pragmatinio vertinimo kriterijaus nepakankamumas nustatant pirmojo laipsnio komunikacijos teorijų tinkamumą.Pagrindiniai žodžiai: pragmatizmas komunikacijos teorijoje, komunikacijos metateorija, komunikacijos filosofija.Two Problems in Robert T. Craig’s Pragmatic Communication MetatheoryKęstutis Kirtiklis   SummaryRobert T. Craig’s metatheory of communication proposed the pragmatic basis for the systematization typologizing contemporary communication theories and the creation of a more universal communication theory. The article argues that the main problems of Craig’s metatheory are caused by the acceptance of Rortyan style neopragmatism and thereby by the orientation not towards everyday communication problems, but towards the question of communication among different theoretical discourses. First, it does not state the difference between the first and the second order pragmatic communication theories; second, the pragmatic evaluation criterion is not sufficient to ascertain the adequacy of first-order communication theories.Keywords: pragmatism in communication theory, communication metatheory, philosophy of communication.: 18px;"> 

Sign in / Sign up

Export Citation Format

Share Document