scholarly journals Determination of the Starting Point in Time Series for Trend Detection Based on Overlapping Trend

2016 ◽  
Vol 16 (6) ◽  
pp. 98-110
Author(s):  
Gao Xuedong ◽  
Gu Kan

Abstract The traditional time series studies consider the time series as a whole while carrying on the trend detection; therefore not enough attention is paid to the stage characteristic. On the other hand, the piecewise linear fitting type methods for trend detection are lacking consideration of the possibility that the same node belongs to multiple trends. The above two methods are affected by the start position of the sequence. In this paper, the concept of overlapping trend is proposed, and the definition of milestone nodes is given on its base; these way not only the recognition of overlapping trend is realized, but also the negative influence of the starting point of sequence is effectively reduced. The experimental results show that the computational accuracy is not affected by the improved algorithm and the time cost is greatly reduced when dealing with the processing tasks on dynamic growing data sequence.

2021 ◽  
Vol 11 (14) ◽  
pp. 6508
Author(s):  
Javier de Pedro-Carracedo ◽  
Ana María Ugena ◽  
Ana Pilar Gonzalez-Marcos

The 0–1 test distinguishes between regular and chaotic dynamics for a deterministic system using a time series as a starting point without appealing to any state space reconstruction method. A modification of the 0–1 test allows for the determination of a more comprehensive range of signal dynamic behaviors, particularly in the field of biological signals. We report the results of applying the test and study with more details the PhotoPlethysmoGraphic (PPG) signal behavior from different healthy young subjects, although its use is extensible to other biological signals. While mainly used for heart rate and blood oxygen saturation monitoring, the PPG signal contains extensive physiological dynamics information. We show that the PPG signal, on a healthy young individual, is predominantly quasi-periodic on small timescales (short span of time concerning the dominant frequency). However, on large timescales, PPG signals yield an aperiodic behavior that can be firmly chaotic or a prior transition via an SNA (Strange Nonchaotic Attractor). The results are based on the behavior of well-known time series that are random, chaotic, aperiodic, periodic, and quasi-periodic.


2013 ◽  
Vol 62 (3) ◽  
pp. 487-496 ◽  
Author(s):  
Tadeusz J. Sobczyk

Abstract The paper discuss a problem of determination of inductances for AC machine windings when saturation of magnetic circuit is not neglected. For such cases, computation of magnetic field distribution in the machine magnetic circuit is a starting point for post processing procedures leading to various values, among others the co-energy in a given area and linkage fluxes of windings. This paper shows how to determine winding inductances in a nonlinear magnetic circuit from these two values and also how to compute directly nonlinear inductances. Problem is not trivial because such inductances are not uniquely determined as for linear case. In the paper a definition of nonlinear inductances is proposed which makes the choice unique.


2005 ◽  
Vol 56 (1) ◽  
pp. 86-124
Author(s):  
Kim Arne Pedersen

Grundtvig og fundamentalismen[Grundtvig and fundamentalism]By Kim Arne PedersenThe chosen starting-point is Ole Vind’s perception of Gr as a Biblefundamentalist. Vind constructs a concept of fundamentalism along idea-historical lines and focuses on what he perceives to be Gr’s literal reading of, especially, the Old Testament; but he also emphasises that for Gr the Scriptures were directly inspired by God.Through the introduction of a theological-historical and secularhistorical definition of the concept of fundamentalism, Gr’s relationship to the Bible is examined with the aim of mounting a critique of Vind’s interpretation. Gr’s view of the Bible in the period 1810-11 to 1824-25 is characterised against the background of that struggle with himself which his conversion in 1810 entailed, and with the introduction of the theological-historical definition of fundamentalism.This finds its starting-point in fundamentalism as a concrete historical phenomenon in the USA at the end of the 19th and beginning of the 20th century. It is distinguished by the resolution of traditional Christianity into five dogmatic points, including the dogma of verbalinspiration (every word in the Holy Scriptures is divinely dictated), to which is added the individual Christian’s personal inner experience with its basis in conversion.With this as background, Gr may be called fundamentalist in the period 1810 to 1824-25, since Gr (1) has been through a more or less pietistic conversion, (2) rejects a historical-critical approach to the Bible, (3) holds firm to verbal-inspiration, (4) rejects a modem interpretation of Christianity, (5) holds firm to traditional Christianity against the rationalists and would certainly have been able to subscribe to the fundamentalists’ five points, (6) rejects a scientific explanation of the world, and (7) believes that a form of scientific alternative to the world-picture of the natural sciences can be worked out on a Biblical basis. However, the theological-historical definition of fundamentalism needs to be supplemented by a secular-historical determination of the concept. Here a link is made with Uffe Østergaard’s demonstration of the significance of the art of printing in the Reformation as a prerequisite of fundamentalism, in that verbal-inspiration is thus placed centre-stage. Østergaard’s point is that fundamentalism is not only a reaction against modernisation, but is itself a modem phenomenon, and here he focuses upon the fundamentalists’ insistence upon a direct access to Scripture independently of religious tradition’s mediating influence. Here Østergaard’s observations are supplemented by the viewpoint that the revivalist movements of the 18th and 19th centuries are the foundation of fundamentalism; and the German concept-historical school’s concept of modernity is introduced, supplemented by Habermas’s Kant-inspired determination of subjectivity as the core of modernity, and of secularisation as a consequence of the differentiation of spheres of validity it entails.Finally, it is proposed that fundamentalism in a secular-historical sense must be seen as a consequence of secularisation as an historical phenomenon, affected by industrialisation and the dominance of the natural sciences after 1850. Thus fundamentalists belong in the period after 1850 as the second phase of modernisation, and they seek to direct society back to an idealised golden age.The core of the theological-historical definition of fundamentalism is the conflict between traditional religion and a modem interpretation of it; the core of the secular-historical definition is the conflict between modernisation/secularisation and a religious reaction against this, which desires the whole of society or a state within the state free of secularisation.After Gr’s struggle with aspects of his understanding of Christianity in 1824-25 his view of the Bible becomes freer and he breaks explicitly with the dogma of verbal-inspiration. However, Gr’s location in time itself, and his complex attitude towards modernity is of more importance. (1) Gr can hardly be lumped together with that group of modem intellectuals, people with education, who are related to industrial and post-industrial society and who are going through a fundamentalist conversion. Grundtvig belongs in another age, in modernity’s first phase from 1750 to 1850 - and his concept of modernity can be extrapolated from analyses of his complex attitude towards Kant’s concept of autonomy. The facts that (2) between 1811 and 1824 he is an adherent of verbal-inspiration, and (3) in his battle with Enlightenment theology (and in that connection with the ecclesiastical authorities) he turns against the traditional theological teaching institutions, and (4) he wishes to reform theology, are not sufficient grounds for characterising him as a fundamentalist, for Gr (5) does not want, as do the fundamentalists, a return to an idealized golden age. In Gr’s notion of the sequence of national congregations, and the fact that the one succeeds to the other, lies hidden a historical mentality stamped with the idea that the different congregations embody different characteristics. To conceptualise change is modem, and in that sense Gr is stamped with modernity. (7) Ultimately, Gr does not seek to stifle the scientific attempt to clarify the Bible and the world independently of a literal reading of the Old Testament. This Vind overlooks, when he alleges that even after 1825 Gr can be called a fundamentalist.The decisive characteristic which divides Gr from fundamentalism is really not his break with Bible-Christianity in 1823, 1824 and 1825, nor his related rejection of verbal-inspiration, but rather the opening of his mind in relation to the naturalists, and therewith the theologicallyorientated foundation of this opening upon two central concepts: his educational idea - that is, the separation between church and school - and his idea of freedom. The educational concept and the concept of freedom are indissolubly bound together, and Gr’s thematising of freedom in respect of things scientific is tied up with his consciousness of modernity.


sub-committee on the general chart of accounts and financial statements, headed by Lemoine and Pujol; and the sub-committee on cost accounting, headed by Martin [Brunet, 1951, p. 166]. The committee had to focus on accounting in industrial and commercial businesses as the starting point of what would ulti­ mately become a national rationalization of accounting. More, specifically, the accounting system chosen had to be simple, com­ plete and flexible enough to be applied to large companies as well as to the more numerous small and medium-sized companies. Finally, the orientation chosen by the plan’s designers was towards the determination of financial results for investors and creditors (particularly banks), and the determination of product costs for pricing purposes. Although finding a plan suitable for national accounting was not the primary goal of the committee, several measures were nonetheless adopted which stressed the economic orientation of the accounting reform. The economic concerns of the designers were reflected in the following features of the plan: 1. Classification of companies’ assets according to their eco­ nomic function or location; 2. In the balance sheet, grouping of accounts into classes that reflected the accounts’ economic function: permanent capi­ tal, long-term assets, inventories, third-party accounts and financial accounts; 3. The classification of expenses by type, which provided the necessary elements for the study of the economic situation at the company, industry and national levels; 4. The production of information on company operations to complete the financial statements, such as endorsements and commitments, or to facilitate the analysis of certain elements of the balance sheet (depreciation, fixed assets, provisions). Contents o f the 1947 Plan The plan constituted a complete set of accounting procedures, including [Veyrenc, 1950?; Retail, 1951]: 1. A definition of financial and cost accounting; 2. A chart of accounts (see Appendix) and related terminol­ ogy; 3. A list of the accounts and how they interact; 4. General rules for the application of the plan; 5. Valuation rules for assets; 6. Rules for determining depreciation and provisions;

2014 ◽  
pp. 345-345

Author(s):  
James M. Green

This Paper Develops A Method For Determining A Meaningful Reaction Time In Accident Reconstruction And Civil Engineering Design. A Method For Total Perception Time (Tpt) Is Explained Using Literature From The Professions Of Psychology, Optometry And Engineering. A Determination Of Total Perception Time (Tpt), Or Total Perception Distance (Tpd), Is Given Where The Engineer Allows Enough Time For The Actual Stimulus To Be Identified Before Determining If Evasive Action Can Be Taken Or Collision Can Be Avoided. The Use Of Tpt Can Be Calculated In Accident Reconstruction And Engineering Design By Using The Actual Environmental Conditions That Were Present At The Site Under Investigation. The Purpose Of Presenting This Analysis Is To Establish A Starting Point For Discussion And Evaluation Of Total Perception Time (Tpt) Or Total Perception Distance (Tpd). The Reaction Time Sequence Affects Every Facet Of Forensic Engineering And Civil Engineering Design. It Is The Writers Intent That A Definition Of This Methodology Can Be Developed In Order That The Engineering Community Will Have A Tool That Is Accepted.


2005 ◽  
Vol 18 (6) ◽  
pp. 886-891 ◽  
Author(s):  
Donald B. Percival ◽  
D. Andrew Rothrock

Abstract In examining a plot of a time series of a scalar climate variable for indications of climate change, an investigator might pick out what appears to be a linear trend commencing near the end of the record. Visual determination of the starting time of the trend can lead to an incorrect conclusion that the trend is significant when the assessment is based on standard linear regression analysis; in fact, a presumed level of significance of 5% can be smaller than the actual level by up to an order of magnitude. An alternative procedure is suggested that is more appropriate for assessing the significance of a trend in which the starting point is identified visually.


Author(s):  
Volker Scheid

This chapter explores the articulations that have emerged over the last half century between various types of holism, Chinese medicine and systems biology. Given the discipline’s historical attachments to a definition of ‘medicine’ that rather narrowly refers to biomedicine as developed in Europe and the US from the eighteenth century onwards, the medical humanities are not the most obvious starting point for such an inquiry. At the same time, they do offer one advantage over neighbouring disciplines like medical history, anthropology or science and technology studies for someone like myself, a clinician as well as a historian and anthropologist: their strong commitment to the objective of facilitating better medical practice. This promise furthermore links to the wider project of critique, which, in Max Horkheimer’s definition of the term, aims at change and emancipation in order ‘to liberate human beings from the circumstances that enslave them’. If we take the critical medical humanities as explicitly affirming this shared objective and responsibility, extending the discipline’s traditional gaze is not a burden but becomes, in fact, an obligation.


2016 ◽  
Vol 4 (2) ◽  
pp. 170 ◽  
Author(s):  
K. Eylem Özkaya Lassalle

The concept of failed state came to the fore with the end of the Cold War, the collapse of the USSR and the disintegration of Yugoslavia. Political violence is central in these discussions on the definition of the concept or the determination of its dimensions (indicators). Specifically, the level of political violence, the type of political violence and intensity of political violence has been broached in the literature. An effective classification of political violence can lead us to a better understanding of state failure phenomenon. By using Tilly’s classification of collective violence which is based on extent of coordination among violent actors and salience of short-run damage, the role played by political violence in state failure can be understood clearly. In order to do this, two recent cases, Iraq and Syria will be examined.


2020 ◽  
Vol 2020 (9) ◽  
pp. 29-33
Author(s):  
Sergey Bulatov

The paper purpose is the effectiveness estimation in the technological equipment use, taking into account its reliability and productivity for defective transmission units of buses. The problem consists in the determination of time to be spent on repair of bus transmission units taking into account technological equipment reliability. In the paper there is used a probabilistic method for the prediction bus transmission units, and also a method of the dynamics of averages which allow ensuring minimum of costs for units downtime during repair and equipment cost. The need for repair of transmission units (gear box) arises on an average after 650 hours, the average productivity of the bench makes 4.2 bus / hour. The bench fails on the average after 4600 hours of work, the average time of the bench makes 2 hours. In such a way the solution of the problem specified allows analyzing the necessity of time decrease for transmission unit repair to avoid long downtimes of buses in repair areas without negative impact upon high repair quality and safety during the further operation.


2020 ◽  
pp. 28-32
Author(s):  
V.S. Vanaev

Development of complex determination of parameters of jackhammers at bench tests is studied. The modern support of tests of jackhammers for the purpose of definition of their energy, vibration and noise indicators is considered. Descriptions of the SORP universal bench and UIPU measuring complex are given. Keywords jackhammer, bench, tests, processing object, energy indicators, impact energy, dynamic indicators [email protected]


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