Msplit and MP estimation. A wider range of robustness

2017 ◽  
Author(s):  
Robert Duchnowski ◽  
Zbigniew Wisniewski
Keyword(s):  
Measurement Errors ◽  
Probabilistic Models ◽  
Interesting Property ◽  
The Other ◽  
Estimation Methods ◽  
Excess Kurtosis ◽  
New Methods ◽  
Other Hand ◽  
Functional Models ◽  
M Estimation

Msplit and MP estimations are new methods of assessing the parameters of functional models of geodetic observations. The first method assumes that each observation can be assigned to either of some functional models which differ from each other in competitive parameters. While the latter method is based on the assumption that distributions of measurement errors differ from the normal one in asymmetry and excess kurtosis. The theoretical properties indicate that both methods are also robust against outliers. However, the sense of robustness is a little wider than in the case of M-estimation. In Msplit estimation the outliers are treated as variables with competitive functional models (in relation to models of “good” observations) while robustness of MP estimation depends on the mentioned parameters of probabilistic models of observations. This paper shows that on one hand robustness is an interesting property of the methods in question, but on the other hand it broadens possible application of such estimation methods.

Investigation and Impact of Knowledge-Based Information on Programming Languages Based on Probabilistic Models

2010 ◽  
Vol 39 ◽  
pp. 436-440
Author(s):  
Zhi Ming Qu
Keyword(s):  
Expert Systems ◽  
Programming Languages ◽  
Probabilistic Models ◽  
Role Playing ◽  
Position Paper ◽  
The Other ◽  
Erasure Coding ◽  
Role Playing Games ◽  
Knowledge Based ◽  
Other Hand

In recent years, much research has been devoted to the refinement of IPv6; on the other hand, few have investigated the confusing unification of interrupts and Internet QoS. In this position paper, it demonstrates the emulation of interrupts. In order to overcome this quagmire, a novel system is presented for the intuitive unification of expert systems and massive multiplayer online role-playing games. It is concluded that erasure coding can be verified to make heterogeneous, interposable, and event-driven, which is proved to be applicable.

Models with the ω-property

1989 ◽  
Vol 54 (1) ◽  
pp. 177-189 ◽  
Author(s):  
Roman Kossak
Keyword(s):  
Structural Properties ◽  
Interesting Property ◽  
Order Type ◽  
Countable Model ◽  
The Other ◽  
Recursive Saturation ◽  
Saturated Models ◽  
Other Hand ◽  
To Come ◽  
Recursively Saturated

In [KP] we have studied the problem of determining when a subset of a (countable) model M of PA can be coded in an elementary end extension of M. Sets with this property are called elementary extensional. In particular we can ask whether there are elementary extensional subsets of a model which have order type ω. It turns out that having elementary extensional subsets of order type ω is an interesting property connected with other structural properties of models of PA. We will call this property the ω-property. In [KP] the problem of characterizing models with the ω-property was left open. It is still open, and the aim of this paper is to present a collection of results pertaining to it. It should be mentioned that the same notion was studied by Kaufmann and Schmerl in [KS2] in connection with some weak notions of saturation which they discuss there. Our notion of a model with the ω-property corresponds to the notion of an upward monotonically ω-lofty cut.It is fairly easy to see that countable recursively saturated models (or in fact all recursively saturated models with cofinality ω) and all short recursively saturated models have the ω-property (Proposition 1.2 below). On the other hand, if we had asked the question about the existence of models with the ω-property before 1975 (when recursively saturated models were introduced) the answer would probably not have been that easy and we would have to come to notions close to recursive saturation.

scholarly journals THE IMPORTANCE OF SAVA’S SPELLING BOOK IN THE BEGINNERS’ COURSE OF READING AND WRITING AND IN THE TEACHING OF SERBIAN CULTURE

2020 ◽  
Author(s):  
Biljana Samardžić ◽  
◽  
Daliborka Škipina ◽  
Keyword(s):  
Teaching Methods ◽  
Teaching Method ◽  
The Other ◽  
Literary Language ◽  
Pedagogical Approach ◽  
Reading And Writing ◽  
New Methods ◽  
Other Hand ◽  
Slavonic Language ◽  
New Knowledge

The authors of this paper deal with the pedagogical and philological significance of Sava’s Spelling Book printed in Russia (Moscow) in 1692, in the Russian-Slavonic language. This spelling book is about 100 years younger than the First Serbian Spelling Book (The Spelling Book of Sava Inok of the monastery Dečani). This spelling book of the Russian recension reached all the way to the Serbian lands, being, on one hand, the precedent, and on the other hand, the follower to the books that are to appear in Serbia and its new literary language. The authors of this paper explain in a detailed way the method of letter teaching by which each letter (Slavonic, Greek, and Latin) is being assigned a corresponding picture. This points out to the pedagogical approach to the acquisition of new knowledge (the basics of reading and writing) which uses pictures of animals and plants in order to facilitate the process of letter learning. In his lecture, KarionIstomin, the author of the spelling book, suggested totally new teaching methods i.e. the new methods. Namely, Sava’s Spelling book is the precursor of contemporary spelling books, since all of them use the connection between letters and pictures as the basis of their teaching method.

Computation of Rigid-Body Angular Acceleration From Point-Acceleration Measurements

1987 ◽  
Vol 109 (2) ◽  
pp. 124-127 ◽  
Author(s):  
Jorge Angeles
Keyword(s):  
Angular Velocity ◽  
Rigid Body ◽  
Measurement Errors ◽  
Angular Acceleration ◽  
The Body ◽  
The Other ◽  
Compatibility Conditions ◽  
Other Hand ◽  
The One

The computation of the angular acceleration of a rigid body from measurements of accelerations of three noncollinear points of the body is presented in this paper. This is based on algorithms presented previously for the computation of the orientation and the angular velocity of a rigid body from measurements of position and velocity of three noncollinear points of the body. Moreover, compatibility conditions that the said point measurements should verify are introduced. These are necessary to verify the rigidity assumption on the one hand; on the other hand, they are introduced as a means of filtering roundoff and/or measurement errors, which is particularly useful if redundant measurements are taken, i.e., on more than three points. The procedure is illustrated with a fully solved example.

Tools and Technology for Language Documentation and Revitalization

2018 ◽  
pp. 224-247
Author(s):  
Keren Rice ◽  
Nicholas Thieberger
Keyword(s):  
Digital Media ◽  
Language Revitalization ◽  
The Other ◽  
Language Documentation ◽  
Limited Availability ◽  
New Methods ◽  
Other Hand

A defining feature of new methods of documenting languages is the advance in technologies for recording, transcribing, annotating, managing, and analyzing language records, which then facilitates delivering that documentation for use in various forms, in particular for language revitalization efforts. It is the affordances offered by these new methods that have expanded the possibilities of language documentation to create richer records and enabling collaboration over distance, both between linguists and between linguists and speakers. Digital materials can serve multiple purposes, often unforeseen by the original recorder. Analog recordings had limited availability in single locations and access to timepoints within a recording was labor intensive and slow. Digital media on the other hand can be instantly accessed in many locations, and permits citation to the level of a word or even a phoneme and thus offers verification of analyses with reference to the primary recordings.

scholarly journals Selected Aspects of Crisis Management with the Use of Unmanned Aerial Vehicles (UAV) on the Example of a Traffic Disaster

2021 ◽  
Vol 58 (2) ◽  
pp. 140-152
Author(s):  
Wiesław Jaszczur ◽  
Szymon Łukasik
Keyword(s):  
Measurement Error ◽  
Unmanned Aerial Vehicles ◽  
Crisis Management ◽  
Measurement Errors ◽  
The Other ◽  
Research Approach ◽  
Aerial Vehicles ◽  
Other Hand ◽  
The Impact ◽  
Modern Technologies

Purpose: The theoretical aim of this study was to present the impact of modern technologies on the improvement of the effectiveness of process activ- ities (documenting) at the site of a communication disaster. On the other hand, the utilitarian goal was to present the improvement of the organization of documenting a mass incident with the use of drones and photogrammetry tools. Design and methods: As part of the exercise consisting of a simulation of a communication disaster, the activities were documented using the func - tionality of unmanned aerial vehicles which interact with an IT system (Pix4D application). The characteristic drone models which can be used in the monitoring of a disaster site were presented. The discussed research approach describes the methods used to perform drone flights and to what extent the photogrammetric method of processing digital images obtained from drones was used. The issue of field measurements (control points, control lines), the purpose of which was to determine the accuracy of mapping and matching to the coordinate system, was discussed. Results: As part of the research, images were captured and taken with the use of UAVs and IT systems, which were collated and compared with the results of measurements from the visual inspection of the disaster site, performed in a traditional manner by the representatives of the procedural entity. A comparative analysis of the collected research material leading to a comparison of the work results captured by means of the traditional procedural forms with the methods and techniques of modern technologies (drone with the Pix4D Cloud application) allows for the following conclusions to be drawn. For short measuring sections (up to 15 meters), the measurement accuracy of the two methods differs by about 1.5%. For longer measuring sections (up to 100 m), the measurement error is approx. 2.3%. Conclusions: In case of the UAV method and the application Pix4D Cloud, the sources of measurement errors should be seen in the accuracy of rendering of the details of the model (the quality of imaging) and the ability to use this application. On the other hand, when using the police method, in which the measurement trolley is the measuring tool, the sources of error should be seen in the uneven terrain, the obstacles in the terrain, and the measurement error of the tool itself (the trolley). The innovation of the project to use UAVs certainly gains importance especially in a terrain with limited accessibility, i.e. in hilly and mountainous terrain, at road intersections or forks. Keywords: communication disaster, modern technologies, crisis management Article type: preliminary report

scholarly journals A Positive Answer for 3IM+1CM Problem with a General Difference Polynomial

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Huicai Xu ◽  
Shugui Kang ◽  
Qingcai Zhang
Keyword(s):  
Meromorphic Function ◽  
Finite Order ◽  
Analytic Functions ◽  
Positive Answer ◽  
The Other ◽  
Main Difficulty ◽  
New Methods ◽  
Other Hand ◽  
Difference Polynomial ◽  
General Difference

In this paper, the 3IM+1CM theorem with a general difference polynomial L z , f will be established by using new methods and technologies. Note that the obtained result is valid when the sum of the coefficient of L z , f is equal to zero or not. Thus, the theorem with the condition that the sum of the coefficient of L z , f is equal to zero is also a good extension for recent results. However, it is new for the case that the sum of the coefficient of L z , f is not equal to zero. In fact, the main difficulty of proof is also from this case, which causes the traditional theorem invalid. On the other hand, it is more interesting that the nonconstant finite-order meromorphic function f can be exactly expressed for the case f ≡ − L z , f . Furthermore, the sharpness of our conditions and the existence of the main result are illustrated by examples. In particular, the main result is also valid for the discrete analytic functions.

A study of cometary eruptions through OH radio-lines

1999 ◽  
Vol 173 ◽  
pp. 249-254
Author(s):  
A.M. Silva ◽  
R.D. Miró
Keyword(s):  
Short Duration ◽  
Growth Curves ◽  
The Other ◽  
Initial Mass ◽  
Radio Lines ◽  
Other Hand ◽  
Sudden Rise

AbstractWe have developed a model for theH2OandOHevolution in a comet outburst, assuming that together with the gas, a distribution of icy grains is ejected. With an initial mass of icy grains of 108kg released, theH2OandOHproductions are increased up to a factor two, and the growth curves change drastically in the first two days. The model is applied to eruptions detected in theOHradio monitorings and fits well with the slow variations in the flux. On the other hand, several events of short duration appear, consisting of a sudden rise ofOHflux, followed by a sudden decay on the second day. These apparent short bursts are frequently found as precursors of a more durable eruption. We suggest that both of them are part of a unique eruption, and that the sudden decay is due to collisions that de-excite theOHmaser, when it reaches the Cometopause region located at 1.35 × 105kmfrom the nucleus.

Closing the GAP—A 5Å Scanning Microscope

1969 ◽  
Vol 27 ◽  
pp. 6-7
Author(s):  
A. V. Crewe
Keyword(s):  
Normal Form ◽  
The Other ◽  
Resolving Power ◽  
Scanning Microscope ◽  
Conventional Microscope ◽  
Other Hand ◽  
Closing The Gap ◽  
Thermal Sources ◽  
Better Than ◽  
Transmission Microscope

We have become accustomed to differentiating between the scanning microscope and the conventional transmission microscope according to the resolving power which the two instruments offer. The conventional microscope is capable of a point resolution of a few angstroms and line resolutions of periodic objects of about 1Å. On the other hand, the scanning microscope, in its normal form, is not ordinarily capable of a point resolution better than 100Å. Upon examining reasons for the 100Å limitation, it becomes clear that this is based more on tradition than reason, and in particular, it is a condition imposed upon the microscope by adherence to thermal sources of electrons.

Life Beyond 1MeV

1980 ◽  
Vol 38 ◽  
pp. 30-33
Author(s):  
K.H. Westmacott
Keyword(s):  
Electron Microscopy ◽  
Past Experience ◽  
The Other ◽  
Good Case ◽  
Other Hand ◽  
The U.S

Life beyond 1MeV – like life after 40 – is not too different unless one takes advantage of past experience and is receptive to new opportunities. At first glance, the returns on performing electron microscopy at voltages greater than 1MeV diminish rather rapidly as the curves which describe the well-known advantages of HVEM often tend towards saturation. However, in a country with a significant HVEM capability, a good case can be made for investing in instruments with a range of maximum accelerating voltages. In this regard, the 1.5MeV KRATOS HVEM being installed in Berkeley will complement the other 650KeV, 1MeV, and 1.2MeV instruments currently operating in the U.S. One other consideration suggests that 1.5MeV is an optimum voltage machine – Its additional advantages may be purchased for not much more than a 1MeV instrument. On the other hand, the 3MeV HVEM's which seem to be operated at 2MeV maximum, are much more expensive.

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