Bibliographies thématiques / Value anomaly

Littérature scientifique sur le sujet « Value anomaly »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Value anomaly"

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Ilahude, Delyuzar. « MAGNETIC ANOMALY PATTERNS USING TREND SURFACE ANALYSIS APPLICATION (TSA) ON MARINE GEOLOGY MAPPING IN THE BALIKPAPAN WATERS ». BULLETIN OF THE MARINE GEOLOGY 27, no 1 (15 février 2016) : 19. http://dx.doi.org/10.32693/bomg.27.1.2012.42.

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The application of Trend Surface Analysis (TSA) method an geological and geophysical research in map sheets 1813-1814, Balikpapan Waters and its surrounding, shows the significant value of residual anomaly. The magnetic disseverance of regional and total anomaly value obtained the negative anomaly between -50 nT and -350 nT and positive anomaly between +50 nT and +400 nT. The contour of total and regional anomaly shows the magnetic properties of rocks which characterizes the geological arrangements of the research areas. Residual anomaly yielded from the 2nd order value of regional anomaly might be correlated with the formation of basin structures in the central and northern parts of research area, which is interpreted as a part of Kutai Basin. Keywords : TSA method, magnetic anomaly, geology and geophisics, Balikpapan Waters. Penerapan metode TSA dalam penelitian geologi dan geofisika di Lembar Peta 1813-1814, Perairan Balikpapan dan sekitarnya menunjukkan nilai anomali sisa yang cukup signifikan. Hasil pemisahan nilai anomali magnet regional dan anomaly total diperoleh nilai anomali yaitu antara -50 nT dan –350 nT dan anomali positif antara +50 nT dan +400 nT. Kontur anomali total dan anomali regional memperlihatkan sifat kemagnitan batuan yang mencirikan tatanan geologi daerah penelitian. Anomali sisa dihasilkan dari nilai anomali regional orde ke 2, kemungkinan berkaitan dengan pembentukan struktur cekungan di bagian tengah dan utara daerah penelitian yang ditafsirkan sebagai bagian dari Cekungan Kutai. Kata kunci : metode TSA, anomali magnet, geologi dan geofisika, Perairan Balikpapan.
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Ilahude, Delyuzar, et Beben Rachmat. « POLA ANOMALI MAGNET LOKAL DARI APLIKASI TREND SURFACE ANALYSIS (TSA) PADA PEMETAAN GEOLOGI KELAUTAN BERSISTEM DI PERAIRAN SELAT MALAKA SUMATERA UTARA ». JURNAL GEOLOGI KELAUTAN 9, no 2 (16 février 2016) : 109. http://dx.doi.org/10.32693/jgk.9.2.2011.204.

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Analisis intensitas magnet dari penerapan metode TSA orde ke 2 menunjukkan nilai anomali lokal yang cukup signifikan dari pemisahan nilai anomali magnet total di perairan Selat Malaka. Kontur anomali lokal yang dihasilkan diduga berkaitan dengan pola struktur geologi busur belakang Sumatera Utara. Kata kunci : anomali lokal, metode TSA Analysis of magnetic intensity using 2nd orde of the TSA method shows a significant value of local anomaly from the separation of total magnetic anomaly value in the Malaka Strait waters. Contour of the local anomaly resulted is assumed to be correlated with the geological structure pattern of back arc of North Sumatera. Keyword : local anomaly, TSA method
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Muhajirin, Muhajirin, Nazli Ismail et Bukhari Bukhari. « The Computation of Residual and Regional Anomaly of Gravity Method Data By Polynomial Filter Using Microsoft Excel ». Journal of Aceh Physics Society 9, no 2 (1 mai 2020) : 37–41. http://dx.doi.org/10.24815/jacps.v9i2.15745.

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Eksplorasi metode gravitasi umumnya dilakukan untuk mencari objek di bawah permukaan yang dangkal sehingga perlu dilakukan pemisahan anomali residual dan regional dari anomali Bouguer lengkap. Perhitungan anomali residual biasanya menggunakan software khusus untuk pengolahan data geofisika yang berlisensi atau algoritma dengan bahasa pemrograman, sedangkan program Microsoft Excel pada PC dan notebook biasa digunakan untuk perhitungan polinomial pada pengolahan data statistik. Penelitian ini memperkenalkan cara menghitung anomali residual menggunakan Microsoft Excel dengan filter polinomial. Hasil validasi yang menggunakan model sintetik menunjukkan bahwa perhitungan tersebut dapat diaplikasikan pada data metode gravitasi. Apalikasi pada data lapangan diperoleh bahwa anomali residual berfrekuensi tinggi, sedangkan anomali regional berfrekuensi rendah. Nilai anomali residual dipengaruhi oleh trendline anomali Bouguer lengkap dalam domain jarak. Hasil ini relatif sama dengan hasil perhitungan software lainnya. Gravity method exploration was generally conducted to seek the object in shallow underground so that required residual and regional anomaly separation of complete Bouguer anomaly. The residual anomaly separation was usually used by the special softwares for geophysics that require licency or algorithm by programming language, however the program of Microsoft Excel in the PC or notebook was usually applied to compute the polynomial filter for statistic data analysis. This research introduces how to compute residual anomaly using Microsoft Excel through polynomial filter. The validation result of sintetic model shows that the computation using Microsoft Excel can be applied to gravity method data. The application of field data was obtained that residual anomaly has high frecuency, whereas residual anomaly has low frecuency. The value of residual anomaly was influenced by trendline of complete Bouguer anomaly in distance domain. This result relatively equal to the result of other softwares. Keywords: gravity method, residual anomaly, regional anomaly, polynomial filter, Microsoft Excel
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Dax, Achiya. « The Smallest Singular Value Anomaly and the Condition Number Anomaly ». Axioms 11, no 3 (25 février 2022) : 99. http://dx.doi.org/10.3390/axioms11030099.

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Let A be an arbitrary matrix in which the number of rows, m, is considerably larger than the number of columns, n. Let the submatrix Ai,i=1,…,m, be composed of the first i rows of A. Let βi denote the smallest singular value of Ai, and let ki denote the condition number of Ai. In this paper, we examine the behavior of the sequences β1,…,βm, and k1,…,km. The behavior of the smallest singular values sequence is somewhat surprising. The first part of this sequence, β1,…,βn, is descending, while the second part, βn,…,βm, is ascending. This phenomenon is called “the smallest singular value anomaly”. The sequence of the condition numbers has a different character. The first part of this sequence, k1,…,kn, always ascends toward kn, which can be very large. The condition number anomaly occurs when the second part, kn,…,km, descends toward a value of km, which is considerably smaller than kn. It is shown that this is likely to happen whenever the rows of A satisfy two conditions: all the rows are about the same size, and the directions of the rows scatter in some random way. These conditions hold in a wide range of random matrices, as well as other types of matrices. The practical importance of these phenomena lies in the use of iterative methods for solving large linear systems, since several iterative solvers have the property that a large condition number results in a slow rate of convergence, while a small condition number yields fast convergence. Consequently, a condition number anomaly leads to a similar anomaly in the number of iterations. The paper ends with numerical experiments that illustrate the above phenomena.
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Mu’awanah, Frida Rosidatul, Bambang Priadi, Widodo Widodo, I. Gde Sukadana et Rian Andriansyah. « Mobilitas Uranium pada Endapan Sedimen Sungai Aktif di Daerah Mamuju, Sulawesi Barat ». EKSPLORIUM 39, no 2 (31 janvier 2019) : 95. http://dx.doi.org/10.17146/eksplorium.2018.39.2.4953.

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ABSTRAK Mamuju merupakan daerah yang memiliki nilai laju dosis radiasi (radioaktifitas) tinggi. Daerah penelitian terdiri dari 6 sektor yaitu Sektor Ahu, Orobatu, Takandeang, Botteng, Pangasaan, dan Taan. Variasi batuan pada daerah penelitian tidak mencerminkan distribusi uranium, sehingga diperlukan metode geokimia untuk mengetahui distribusi uranium pada sistem drainase. Penelitian ini bertujuan untuk memberikan gambaran mobilitas dan distribusi uranium pada sistem drainase dengan menggunakan sampel sedimen sungai aktif. Analisis mobilitas uranium menggunakan persen labil yang didapatkan dari perbandingan uranium total dan uranium labil. Nilai uranium total didapatkan dari pengukuran X-Ray fluorescence spectrometry dan nilai uranium labil didapatkan dari pengukuran labile fluorimetry. Pengambilan sampel dilakukan pada 4 lokasi potensial berdasarkan data radiometri. Hasil analisis menunjukkan Sektor Ahu memiliki nilai anomali uranium labil >113,44 ppm, Sektor Pangasaan dengan nilai anomali uranium labil >168,63 ppm, Sektor Takandeang dengan nilai anomali uranium labil >74,36 ppm, dan Sektor Botteng dengan nilai anomali uranium labil >84,23 ppm. Tipe anomali yang teridentifikasi pada dua sektor, yaitu anomali pada sektor Ahu berhubungan dengan presipitasi hidrolisat uranium terlarut pada endapan sungai dari lava Ahu dan breksi Tapalang, sementara anomali pada Sektor Takandeang berhubungan dengan pengayaan permukaan uranium in situ pada tanah dan batuan lava Takandeang. ABSTRACT Mamuju is an area that has a high dose rate (radioactivity) value. The research area consists of 6 sectors namely Ahu, Orobatu, Takandeang, Botteng, Pangasaan, and Taan Sector. Lithological distribution does not represent the distribution of uranium; therefore geochemical method is needed to observe the distribution of uranium in the drainage system. The aim of this research is to provide an overview of the mobility and distribution of uranium in the drainage system using stream sediment. Uranium mobility analysis uses labile percent obtained from the ratio of total uranium and labile uranium, the total uranium value obtained from the measurement of X-Ray fluorescence spectrometry and the value of labile uranium obtained from measurement of labile fluorimetry. The sample taken from 4 potential areas based on radiometric value Map. The result of analysis shows that Ahu Sector has labile uranium anomaly >113.44 ppm, Pangasaan Sector with labile uranium anomaly >168.63 ppm, Takandeang Sector with uranium labile anomaly values >74.36 ppm, and Botteng Sector with uranium labile anomaly >84.23 ppm. The anomaly types identified from two sectors, namely Ahu Sector anomaly is related to the precipitation of dissolved uranium hydrolysates in stream deposit originating from Ahu lava and Tapalang breccia, while Takandeang Sector anomaly is related to the enrichment of in situ uranium in soil and Takandeang lava.
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Hasibuan, Jamaludin, Asdiati Berutu, Halimahtun Sakdiah et Rahmatsyah Rahmatsyah. « Studi Penentuan Anomali Situs Purbakala di Tapanuli Tengah Dengan Metode Geomagnetik ». Wahana Fisika 2, no 1 (20 juin 2017) : 1. http://dx.doi.org/10.17509/wafi.v2i1.7040.

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Penelitian penentuan anomali magnetik situs arkeologi di Tapanuli Tengah dengan metode geomagnetik telah dilakukan untuk mengetahui adanya penampang anomali magnetik di lokasi Lobu Tua. Metode pengukuran Geomagnet menggunakan tipe PPM (Proton Precession Magnetometer) Elsec 770, pengambilan data dilakukan secara acak dengan jumlah titik yang diperoleh 51 titik pengukuran, pengolahan data menggunakan surfer 11 untuk mendapatkan peta kontur dan Mag2DC for windows. Hasil penelitian menunjukkan bahwa penyebaran struktur pelapis Lobu Tua menggunakan metode geomagnet menyebar secara vertikal dan horizontal. Anomali dengan metode geomagnetik memiliki nilai terendah - 122,34 nT dan nilai tertinggi adalah -100,34 nT, dan nilai suseptibilitas 0,77, 0,87, 0,91 dimana model anomali permukaan didominasi oleh batuan alluvium sesuai dengan Peta geologi.Research on the determination of anomaly archaeological site in Central Tapanuli by geomagnetic method has been done in order to know the magnetic anomaly cross section of Lobu Tua site. Geomagnet measurement method using PPM (Proton Precession Magnetometer) type Elsec 770, data retrieval is done randomly with number of point obtained 51 point measure, data processing using surfer 11 to get contour map and Mag2DC for windows. The result of the research shows that the dissemination of Lobu Tua's site coating structure using geomagnet method is spread vertically and horizontally. The anomaly with geomagnetic method has the lowest value - 122,34 nT and the highest value is -100,34 nT, and the susceptibility value 0,77, 0,87, 0.91 where the surface anomaly model is dominated by alluvium rocks according to the geological map.
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Kaindeh, Gloria R., Seni H. Tongkukut, Gerald H. Tamuntuan, R. Telleng, Ferdy Ferdy, Mans Mananohas et Dolfie P. Pandara. « Investigasi Anomali TEC Ionosfer Berkaitan Dengan Gempa Bumi Jailolo 15 Nopember 2019 Menggunakan Metode 2DPCA ». JURNAL ILMIAH SAINS 20, no 2 (28 octobre 2020) : 128. http://dx.doi.org/10.35799/jis.20.2.2020.30073.

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Penelitian ini berfokus pada upaya menginvestigasi anomali Total Electron Content (TEC) ionosfer berkaitan dengan gempa bumi Jailolo yang terjadi pada tanggal 15 November 2019 pukul 01:17 Waktu Indonesia Timur (WIT) dengan menggunakan metode Two Dimensional Principal Component Analysis (2DPCA). Anomali TEC yang teridentifikasi oleh metode 2DPCA digunakan untuk menentukan prekusor dari gempa bumi Jailolo. Citra Global Ionosphere Maps (GIM) TEC selang tanggal 9-15 Nopember 2019 dianalisis dan dikonversi menjadi citra nilai Eigen menggunakan program Matlab_2DPCA. Berdasarkan citra nilai Eigen ditemukan bahwa pada tanggal 13 Nopember 2019 pukul 22:15 – 22:35 WIT telah terjadi anomali TEC ionosfer di atas episenter gempa bumi Jailolo dengan durasi 20 menit. Selama aktivitas pra seismik, ionosfer memberikan respon berupa penurunan nilai TEC. Anomali kandungan elektron total ionosfer merupakan suatu prekursor yang berasosiasi dengan pelepasan gas radon selama aktivitas pra seismik sebelum gempa bumi. Kata Kunci: Anomali TEC; gempa bumi Jailolo; metode 2DPCA; nilai eigen, prekursor Investigation of Ionosphere TEC Anomalies Associated with the 15 November 2019 of Jailolo Earthquake Using the 2DPCA Method ABSTRACTThis research focuses on investigating of the ionospheric total electron content (TEC) anomaly associated with the Jailolo Earthquake earthquake that occurred on November 15, 2019 at 01:17 Eastern Indonesian Time (WIT) using the 2DPCA method. The TEC anomaly identified by the 2DPCA method was used to determine the precursor of the Jailolo earthquake. Global ionosphere maps (GIM) TEC images between November 9-15, 2019 were analyzed and converted into several images of the Eigen value using the Matlab_2DPCA program. Based on Eigen value images, it was found that on November 13, 2019 at 22:15 – 22:35 WIT, an ionosphere TEC anomaly occurred above the epicenter of the Jailolo Earthquake with a duration of 20 minutes. During pre-seismic activity, ionosphere given a responds by decreasing of TEC value. The total electron content anomaly of the ionosphere is a precursor associated with the release of radon gas during pre-seismic activity before an earthquake.Keywords: TEC anomaly; Jailolo earthquake; 2DPCA method; eigen value, precursor
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Kang, Minjung, et Young-Tae Yoo. « Investor perception of fair value evaluation : focusing on financial instruments ». Investment Management and Financial Innovations 16, no 1 (11 mars 2019) : 203–14. http://dx.doi.org/10.21511/imfi.16(1).2019.16.

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This study analyzed capital market investors’ recognition of the predictability of fair value-based valuation. It was examined if market investors overvalue the predictive value of fair value by comparing that value with that measured in accounting performance. The results reveal that investors are likely to overvalue fair value more than predictive values reflected in accounting performance. In particular, the results show that investors can gain abnormal returns through the market anomaly due to the functional fixation that investors cannot distinguish between unrealized profits and realized ones. Though there are considerable studies about accrual anomaly, few studies explore it with the separation of unrealized profits from total accruals. A number of studies about the causes of accrual anomaly have been conducted from various perspectives. The analysis of this study argues that the unrealized profits derived from fair value evaluation can be a cause of accrual anomaly. On the basis of the result, this study suggests that information about unrealized earnings should be reported separately.
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Rahman, Fathu, Taufik Edy Sutanto et Nina Fitriyati. « Web Traffic Anomaly Detection using Stacked Long Short-Term Memory ». InPrime : Indonesian Journal of Pure and Applied Mathematics 3, no 2 (10 novembre 2021) : 112–21. http://dx.doi.org/10.15408/inprime.v3i2.21879.

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AbstractAn example of anomaly detection is detecting behavioral deviations in internet use. This behavior can be seen from web traffic, which is the amount of data sent and received by people who visit websites. In this study, anomaly detection was carried out using stacked Long Short-Term Memory (LSTM). First, stacked LSTM is used to create forecasting models using training data. Then the error value generated from the prediction on test data is used to perform anomaly detection. We conduct hyperparameter optimization on sliding window parameter. Sliding window is a sub-sequential data of time-series data used as input in the prediction model. The case study was conducted on the real Yahoo Webscope S5 web traffic dataset, consisting of 67 datasets, each of which has three features, namely timestamp, value, and anomaly label. The result shows that the average sensitivity is 0.834 and the average Area Under ROC Curve (AUC) is 0.931. In addition, for some of the data used, the window size selection can affect the sum of the sensitivity and AUC values. In this study, anomaly detection using stacked LSTM is described in detail and can be used for anomaly detection in other similar problems.Keywords: time-series data; sliding window; web traffic; window size. AbstrakSalah satu contoh deteksi anomali adalah mendeteksi penyimpangan perilaku dalam penggunaan internet. Perilaku ini dapat dilihat dari web traffic, yaitu jumlah data yang dikirim dan diterima oleh orang-orang yang mengunjungi situs web. Pada penelitian ini, deteksi anomali dilakukan menggunakan Long Short-Term Mermory (LSTM) bertumpuk. Pertama, LSTM bertumpuk digunakan untuk membuat model peramalan menggunakan data latih. Kemudian nilai error yang dihasilkan dari prediksi pada data uji digunakan untuk melakukan deteksi anomali. Kami melakukan optimasi hyperparameter pada parameter sliding window. Sliding window adalah data sub-sekuensial dari data runtun waktu yang digunakan sebagai input pada model prediksi. Studi kasus dilakukan pada dataset web traffic Yahoo Webscope S5 yang terdiri dari 67 dataset yang masing-masing memiliki tiga fitur yaitu timestamp, value, dan anomaly label. Hasil menunjukkan bahwa rata-rata sensitivitas sebesar 0.834 dan rata-rata Area Under ROC Curve (AUC) sebesar 0.931. Selain itu, untuk beberapa data yang digunakan, pemilihan window size dapat mempengaruhi jumlah dari nilai sensitivitas dan AUC. Pada penelitian ini, deteksi anomali menggunakan LSTM bertumpuk dijelaskan secara rinci dan dapat digunakan untuk deteksi anomali pada permasalahan lainnya yang serupa.Kata kunci: data runtun waktu; sliding window; web traffic; window size.
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Shaw, James R. « Magidor on anomaly and truth-value gaps ». Inquiry 59, no 5 (16 juin 2016) : 513–28. http://dx.doi.org/10.1080/0020174x.2016.1184841.

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Thèses sur le sujet "Value anomaly"

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Zhang, Lingsong Marron James Stephen Zhu Zhengyuan Shen Haipeng. « Functional singular value decomposition and multi-resolution anomaly detection ». Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1166.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.
Title from electronic title page (viewed Mar. 27, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Statistics and Operations Research." Discipline: Statistics and Operations Research; Department/School: Statistics and Operations Research.
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Andrikopoulos, Panagiotis. « An investigation of the value anomaly in the UK stock market 1987-2000 ». Thesis, University of Portsmouth, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247478.

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Hepfer, Bradford Fitzgerald. « A closer examination of the book-tax difference pricing anomaly ». Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3096.

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In this study, I examine whether the pricing of book-tax differences reflects mispricing or a priced risk factor. I provide new evidence that temporary book-tax differences are mispriced by developing portfolios that trade on the information in book-tax differences for future accruals and cash flows. I develop and test predictions on whether book-tax difference mispricing is the value-glamour anomaly in disguise. Both signals of mispricing relate to firm growth and, thus, both may capture mispricing due to over-extrapolation of realized growth to future growth. I find that the book-tax difference pricing anomaly is subsumed by the value-glamour anomaly. Specifically, trading on the information in book-tax differences does not yield incremental returns relative to a value-glamour trading strategy. Hence, mispricing associated with book-tax differences relates more generally to the mispricing of expected growth as extrapolated from past growth.
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Haboub, Ahmad. « Essays on equity valuation and accounting conservatism for insurance companies ». Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/15823.

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This thesis contributes to the literature in the finance and accounting field throughout its three empirical chapters. The first empirical chapter contributes to the literature on accounting conservatism in several ways; first, it investigates the accounting conservatism of US insurance companies using four measures, namely, non-operating accruals, skewness of earnings and cash flows, book to market ratio and asymmetric timeliness measures. Second, this paper compares these four measures in order to determine the association and differences between them. Finally, the level of accounting conservatism of the insurance companies is compared to that of a sample of commercial banks to check whether they have similar levels of accounting conservatism. The results of the first chapter suggest that the changes in accounting performance, as measured by return over assets, can be partly explained by accounting conservatism, since it is measured by the accumulation of non-operating accruals, skewness of operating cash flow and accruals, book to market ratio, adjusted book to market ratio and Basu's asymmetric measure. All of these four measures give robust evidence that insurance companies' accounts tended to be conservative for the whole sample period, and that the level of conservatism has risen over the years. More interestingly, a t test for the differences in means suggests that accruals conservatism show on average a higher level of accounting conservatism than book value conservatism does. Finally, our results, based on a constant sample consist of 92 banks and 46 insurance companies whose data are available for all the sample years; they suggest that both insurance companies and banks have similar levels of accounting conservatism due to their similar reporting characteristics. The second empirical chapter contributes to the existing literature on equity valuation in two ways. First, it confirms the importance of imposing linear information dynamics when predicting the equity values of insurance companies, because the restricted models result in fewer error metrics. Second, it highlights the role of the accruals components in the equity valuation of US insurance companies by demonstrating that the incorporation of accrual components in the residuals income valuation model suggested by Ohlson (1995) has smaller error metrics than those of aggregate net income. Our results are based on a sample of US insurance companies, which consists of 718 firm-year observations over the period from 2001 to 2012. For instance, our results suggest that total accruals, changes in insurance reserve, changes in account receivables, and deferred acquisition costs have an incremental ability to predict equity market value over abnormal earnings and book values. Furthermore, the predictive ability of changes in insurance reserves is higher than the predictive ability of changes in account receivables and the change in deferred acquisition costs without imposing the LIM structures. However, when the LIM structure is imposed the predictive ability of changes in deferred acquisition costs is higher than the predictive ability of both changes in accounts receivable and changes in insurance reserves. Our final empirical chapter contributes to the literature on accounting anomalies by investigating the value to price anomaly (V/P), where the fundamental value (V) is estimated using the residual income valuation model. Motivated by the findings of Hwang and Lee (2013), Fama and French (2015), and Fama and French (2016), Chapter Four asks whether V/P strategies reflect the risks factor or whether this is better explained by market inefficiency, and whether Fama and French's five-factor model can explain the excess return of V/P. To answer the previous questions we use data from the merger of COMPUSTAT, CRSP, I/B/E/S for all the non-financial firms listed in AMEX, NYSE, and NASDAQ during the period from 1987 to 2015. Our findings suggest that the V/P ratio is positively correlated to future stock returns after controlling for several firm characteristics, which are known to be proxies of common risks. Our results indicate that the omission of risk factors is not likely to be an explanation of the V/P effect. To answer the second question, we compare the performances of different asset pricing models by calculating the GRS F-statistics. Our findings clearly indicate that the five-factor model of Fama and French performs better than either the CAPM or the traditional Fama and French three factor model. These results confirm that the excess returns of V/P strategy vary due to the differences in size, the B/M ratio, operating profit and betas across quintile portfolios. However, these factors cannot explain all the variation in excess returns; moreover, the stocks in the high V/P may be riskier than the stocks in the low V/P portfolios in certain other dimensions.
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Westerlind, Simon. « Anomaly Detection for Portfolio Risk Management : An evaluation of econometric and machine learning based approaches to detecting anomalous behaviour in portfolio risk measures ». Thesis, KTH, Nationalekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232131.

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Financial institutions manage numerous portfolios whose risk must be managed continuously, and the large amounts of data that has to be processed renders this a considerable effort. As such, a system that autonomously detects anomalies in the risk measures of financial portfolios, would be of great value. To this end, the two econometric models ARMA-GARCH and EWMA, and the two machine learning based algorithms LSTM and HTM, were evaluated for the task of performing unsupervised anomaly detection on the streaming time series of portfolio risk measures. Three datasets of returns and Value-at-Risk series were synthesized and one dataset of real-world Value-at-Risk series had labels handcrafted for the experiments in this thesis. The results revealed that the LSTM has great potential in this domain, due to an ability to adapt to different types of time series and for being effective at finding a wide range of anomalies. However, the EWMA had the benefit of being faster and more interpretable, but lacked the ability to capture anomalous trends. The ARMA-GARCH was found to have difficulties in finding a good fit to the time series of risk measures, resulting in poor performance, and the HTM was outperformed by the other algorithms in every regard, due to an inability to learn the autoregressive behaviour of the time series.
Finansiella institutioner hanterar otaliga portföljer vars risk måste hanteras kontinuerligt, och den stora mängden data som måste processeras gör detta till ett omfattande uppgift. Därför skulle ett system som autonomt kan upptäcka avvikelser i de finansiella portföljernas riskmått, vara av stort värde. I detta syftet undersöks två ekonometriska modeller, ARMA-GARCH och EWMA, samt två maskininlärningsmodeller, LSTM och HTM, för ändamålet att kunna utföra så kallad oövervakad avvikelsedetektering på den strömande tidsseriedata av portföljriskmått. Tre dataset syntetiserades med avkastningar och Value-at-Risk serier, och ett dataset med verkliga Value-at-Risk serier fick handgjorda etiketter till experimenten i denna avhandling. Resultaten visade att LSTM har stor potential i denna domänen, tack vare sin förmåga att anpassa sig till olika typer av tidsserier och för att effektivt lyckas finna varierade sorters anomalier. Däremot så hade EWMA fördelen av att vara den snabbaste och enklaste att tolka, men den saknade förmågan att finna avvikande trender. ARMA-GARCH hade svårigheter med att modellera tidsserier utav riskmått, vilket resulterade i att den preseterade dåligt. HTM blev utpresterad utav de andra algoritmerna i samtliga hänseenden, på grund utav dess oförmåga att lära sig tidsserierna autoregressiva beteende.
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Abrahamsson, Isak, et Malin Karlsson. « Värdeinvestering – en hållbar strategi för överavkastning ? : Ett test av investeringsstrategin F_SCORE på värdeaktier med hög book-to-market kvot ». Thesis, Högskolan i Gävle, Företagsekonomi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-26119.

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Syfte: Det huvudsakliga syftet är att testa om Piotroskis F_SCORE tillämpat på aktier med hög book-to-market kvot kan överavkasta marknadsportföljen samt, som en konsekvens av detta, undersöka vilken grad av marknadseffektivitet som föreligger. Det sekundära syftet är att tillföra ett kunskapsbidrag till företagsledare om relevansen i book-to-market kvoten. Metod: Detta är en kvantitativ studie som utgår från ett positivistiskt synsätt och en hypotetiskt-deduktiv ansats. Statistiska tester i form av regressionsanalyser har utformats för att bestämma resultatets signifikansnivå. Den empiriska datan har inhämtats från databasen Thomson Reuter Datastream och sammanställts i Excel för att sedan analyseras i statistikprogrammet Stata. Resultat & slutsats: Studiens resultat visar att värdeportföljen överavkastar marknadsindex samt att den gör det över en längre tidsperiod. Det går också att fastställa att den riskjusterade avkastningen för värdeportföljen är högre än för marknaden, vilket tyder på att överavkastningen inte beror på en högre risk. Det går dock inte att avgöra om den effektiva marknadshypotesen råder eller ej, däremot går det att utesluta att den starka och semi-starka formen av marknadseffektivitet gäller. Förslag till fortsatt forskning: För att studera vidare huruvida den svaga formen av marknadseffektivitet råder är ett förslag till vidare forskning att göra en studie utifrån Contrarian modellen för att använda teknisk analys som endast tar hänsyn till historiska kursrörelser för att förutspå framtida avkastning. Ett annat förslag till vidare forskning är att genomföra en liknande studie som denna men då bortse från book to market kvoten och istället köpa aktier med ett F_SCORE högre eller lika med 5 samt att blanka de aktier som har ett F_SCORE under 5. Det tredje förslaget är att studera vidare kring sambandet mellan avkastning och anomalier som småbolagseffekten, likviditet och beteendefinans för att få en tydligare förståelse för vad som orsakar överavkastningen. Uppsatsens bidrag: Det teoretiska bidraget är att den aktuella investeringsstrategin överavkastar marknadsindex för vald tidsperiod utan en nödvändigtvis högre risk. F_SCORE antar en normalfördelningskurva där de bolag som har F_SCORE över fem generellt presterar bättre. Resultatet visar även att book to market kvoten är ett användbart nyckeltal för bolagsvärdering. Det praktiska bidraget är att det kan vara av vikt för företagsledare att fokusera på book to market kvoten för att locka investerare. För investerare är bidraget att denna investeringsstrategi kan slå marknadsindex utan att risken i portföljen ökar.
Aim The main aim is to test if Piotroskis F_SCORE applied on stocks with high book-to- market ratio outperforms the market portfolio and therefore determine the level of market efficiency. The secondary aim is to provide knowledge to business executives about the relevance of a book-to-market policy. Method This study is a quantitative research which assumes a positivistic research philosophy with a deductive approach. Several regression analyses have been used to confirm the statistical significance of the different estimated parameters. The empirical results give answers to two hypotheses based on the aim of this research. The empirical data have been collected from Thomson Reuter Datastream, compiled in Excel and analyzed with the statistical software Stata. Result & Conclusions The empirical results of this study show that the value portfolio has a higher return than the market index. The risk-adjusted return for the value portfolio is higher compared to the market portfolio. This indicates that the higher return of the value portfolio is not due to a higher risk. By the results of this study there is not possible to determine whether the market is fully efficient or not. It is only possible to exclude the strong and semi-strong form of market efficiency. Suggestions for future research For future studies, we suggest further research about the weak form of market efficiency. Using historical data to determine future return, as Contrarian model, is one suggestion to reach further evidence of market (in)efficiency. Since F_SCORE assumes a normal distribution and because of the poor performance of the low F_SCORE firms another suggestion is short-sell these stocks to see if the return ca be increased. This empirical field needs further research about which factors that causes the higher return for these stocks. The small firm effect, liquidity and behavioral finance are just a few anomalies that may have a relationship with excess return. Contribution of the thesis The investment strategy in this research shows a higher excess return compared to the market index as well as a higher risk-adjusted return over the given period. This is not only a contribution to investors but also in a theoretical field due to the efficient market hypothesis. F_SCORE have a normal distribution curve where the stocks with F_SCORE of 5 or higher generally have a higher mean return. Another contribution is the relevance of book to market ratio as a useful strategy for valuating companies. The practical contribution gives business executives better understanding about the relevance of a book-to-market policy when attracting investors.
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Warsi, Mohammed Ali. « Ebstein anomaly of the tricuspid valve in an adult cohort ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ46203.pdf.

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Jämtander, Jämtander. « Models explaining the average return on the Stockholm Stock Exchange ». Thesis, Högskolan i Jönköping, Internationella Handelshögskolan, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40360.

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Using three different models, we examine the determinants of average stock returns on the Stockholm Stock Exchange during 2012-2016. By using time-series data, we find that a Fama-French three-factor model (directed at capturing size and book-to-market ratio) functions quite well in the Swedish stock market and is able to explain the variation in returns better than the traditional CAPM. Additionally, we investigated if the addition of a Price/Earning variable to the Fama-French model would increase the explanatory power of the expected returns of the different dependent variables portfolios. We conclude that the P/E ratio does not influence the expected returns in the sample we used.
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Boulfani, Fériel. « Caractérisation du comportement de systèmes électriques aéronautiques à partir d'analyses statistiques ». Thesis, Toulouse 1, 2021. http://publications.ut-capitole.fr/43780/.

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La caractérisation des systèmes électriques est une tâche essentielle dans la conception aéronautique. Elle consiste notamment à dimensionner les composants des systèmes, définir les exigences à respecter par les charges électriques, définir les intervalles de maintenance et identifier les causes racines des pannes sur avions. Aujourd'hui, les calculs sont basés sur la théorie du génie électrique ou des modèles physiques simulés. L'objectif de cette thèse est d'utiliser une approche statistique basée sur les données observées durant les vols et des modèles d'apprentissage automatique pour caractériser le comportement du système électrique aéronautique. La première partie de cette thèse traite de l'estimation de la consommation électrique maximale que fournit un système électrique, dans le but d'optimiser le dimensionnement des générateurs et de mieux connaître les marges réelles. La théorie des valeurs extrêmes a été utilisée pour estimer des quantiles qui sont comparés aux valeurs théoriques calculées par les ingénieurs. Dans la deuxième partie, différents modèles régularisés sont considérés pour prédire la température de l'huile du générateur électrique dans un contexte de données fonctionnelles. Cette étude permet notamment de comprendre le comportement du générateur dans des conditions extrêmes qui ne peuvent pas être réalisées physiquement. Enfin, dans la dernière partie, un modèle de maintenance prédictive est proposé afin de détecter des anomalies dans le fonctionnement du générateur électrique pour anticiper les pannes. Le modèle proposé utilise des variantes de la méthode "Invariant Coordinate Selection" pour des données fonctionnelles
The characterization of electrical systems is an essential task in aeronautic conception. It consists in particular of sizing the electrical components, defining maintenance frequency and finding the root cause of aircraft failures. Nowadays, the computations are made using electrical engineering theory and simulated physical models. The aim of this thesis is to use statistical approaches based on flight data and machine learning models to characterize the behavior of aeronautic electrical systems. In the first part, we estimate the maximal electrical consumption that the generator should deliver to optimize the generator size and to better understand its real margin. Using the extreme value theory we estimate quantiles that we compare to the theoretical values computed by the electrical engineers. In the second part, we compare different regularized procedures to predict the oil temperature of a generator in a functional data framework. In particular, this study makes it possible to understand the generator behavior under extreme conditions that could not be reproduced physically. Finally, in the last part, we develop a predictive maintenance model that detects the abnormal behavior of a generator to anticipate failures. This model is based on variants of "Invariant Coordinate Selection" adapted to functional data
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Silva, José Pedro da. « Nova técnica cirúrgica para a correção da anomalia de Ebstein : resultados imediatos e em longo prazo ». Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/5/5156/tde-28012009-154640/.

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Introdução: As principais operações para correção da anomalia de Ebstein baseiam-se na reconstrução da valva atrioventricular direita (AVD) em formato monovalvular, tendo resultados comprometidos pela necessidade de substituição ou alta reincidência de insuficiência valvar. Uma nova técnica foi desenvolvida, diferenciado-se das anteriores, pela correção anatômica da valva AVD, resultando na coaptação plena das válvulas no fechamento valvar. O objetivo deste estudo é avaliar a aplicabilidade dessa técnica, estudando os seus efeitos na evolução clínica, função da valva, restauração do ventrículo direito funcional e remodelamento reverso do coração no pós-operatório imediato (POI) e no pós-operatório em longo prazo (POL). Métodos: Estudo retrospectivo de 52 pacientes consecutivos, com idade média de 18,5±13,8anos, submetidos técnica do cone para correção da anomalia de Ebstein, entre novembro 1993 e dezembro de 2006, cujos principais detalhes cirúrgicos são: as válvulas anterior e posterior da valva AV direita são mobilizadas das suas implantações anômalas no ventrículo direito (VD), a borda livre desse conjunto é rodada no sentido horário para ser suturada à, previamente mobilizada, borda septal da válvula anterior, formando um cone cujo vértice permanece fixo ao ápice do VD e a base é suturada no nível do anel atrioventricular verdadeiro, reduzido ao mesmo tamanho da base do cone. A válvula septal, sempre que possível, é incorporada à parede do cone. A porção atrializada do VD é reduzida por plicatura longitudinal. Os dados clínicos, ecocardiográficos e os índices cardiotorácicos, obtidos nos períodos pré-operatório (PREOP) e pós-operatório, foram analisados. Resultados: Houve dois óbitos hospitalares (3,8 %) e dois óbitos no seguimento em longo prazo A melhora clínica foi significante, sendo a distribuição dos pacientes em classes funcionais de insuficiência cardíaca (NYHA), IV = 4, III = 27, II = 11 e I = 5 no PREOP, modificada para IV = 0, III = 1, II = 2 e I = 44 no pós-operatório em longo prazo (POL) (p<0,0001), com seguimento médio de 57 meses. Quatro pacientes foram reoperados, sendo realizada nova plastia valvar. O índice cardiotorácico de 0,66±0,09 no PREOP diminuiu para 0,54±0,06 no POL (p<0,0001). Os ecocardiogramas mostraram redução dos graus de insuficiência da valva AV direita (p<0,001), sendo a distribuição dos pacientes no pré-operatório, grau 1 = 0, grau 2 = 1, grau 3 = 15, grau 4 = 24, modificada para grau 1 = 19, grau 2 = 17, grau 3 = 4, grau 4 = 0 no POI, com pequena alteração no POL (grau 1 = 11, grau 2 = 22, grau 3 = 7, grau 4 = 0). A cavidade funcional do VD foi restaurada pela operação, ocorrendo aumento da área do VD funcional indexada de 8,53± 7,02 cm2/m2 no PREOP para 21,01±6,87 cm2/m2 no POI (p<0,001), e ficando inalterada em 20,28±5,26 cm2/m2 no POL (p>0,05). Conclusões: Esta técnica foi aplicável com baixa mortalidade hospitalar e sem necessidade de substituição valvar. Houve melhora clínica pós-operatória e baixa incidência de reoperações em longo prazo. A correção da insuficiência valvar foi eficaz e duradoura na maioria dos pacientes. Houve restauração da área funcional do VD e remodelamento reverso do coração.
Background: The main operations for Ebsteins anomaly repair are conceived to reconstruct the tricuspid valve (TV) in a monocusp format, but their results are restricted either by the need for valve replacement or by high incidence of postoperative valve regurgitation. A new surgical technique was developed, that performs an anatomical reconstruction of the tricuspid valve, realizing a leaflet-to-leaflet coaptation at the TV closure. The objective of this study is to access the feasibility of this technique, evaluating its effects in clinical outcome, tricuspid valve function, right ventricle (RV) morphology and reverse remodeling of the heart.Methods: Retrospective study on 52 consecutive patients, mean age of 18,5+- 13,8 years, treated with a new surgical technique for Ebsteins anomaly repair (the cone technique), between November 1993 and December 2006, which principal details are: a) the anterior and posterior tricuspid valve leaflets re mobilizedfrom their anomalous attachments in the RV, the free edge of this complex is rotated clockwise to be sutured to the septal border of anterior leaflet, creatind a cone which vertex remains fixed at RV apex and whose base is the sutured to a true tricuspid annulus, plicated to match it to base of said cone. The septal leaflet is incorporated into the cone wall ewhenever possible. The atrialized chamber is reduced by longitudinal placation. The clinical and echocardiographic data and the patients cardiothoracic ratios, collected at the preoperative, early and late postoperative periods, were analyzed. Results: There were two hospital deaths (3.8 %) and two more deaths in the long term followup. The significant clinical improvement was evident by the change of patients functional class of heart failure (NYHA) from IV=4, III=27, II=11 and I=5, in the preoperative to IV =0, III = 1, II = 2 e I = 44 at 57 months mean long term follow-up (p<0,0001). Four patients required late TV re-repair. Atrioventricular block did not occur and there was no need for tricuspid valve replacement at any time. The cardiothoracic ratio decreased from 0,66+-0,09, preoperatively, to 0,54+-0,06 in long term follow-up (p<0,001). Echocardiographic studies showed significant TV insufficiency reduction from the preoperative patient distribution of: grade 1 = 0, grade 2 = 1, grade 3 = 15, grade 4 = 24, modified to: grade 1 = 19, grade 2 = 17, grade 3 = 4, grade 4 = 0 on early postoperative period (p<0.001), with little change afterwards (grade 1 = 11, grade 2 = 22, grade 3 = 7, grade 4 = 0). The normal RV morphology was surgically restored, indicated by the enlargement of RV indexed area from 8.53+-7.02 cm2/m2, preoperatively to 21.01+-6.87 cm2/m2 in the early perioperative period (p<0.001), remaining unchanged, 20.28+-5.26 cm2/m2 in long term echocardiogram (p>0,05). Conclusions: This operative technique was feasible with low hospital mortality and no need for TV replacement. There was improvement in the patients clinical status and low incidence of reoperations in long term follow-up. The TV repair was efficacious and durable for the great marjority of patients and there was immediate RV morphology restoration and reverse remodeling of heart in long term follow-up
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Livres sur le sujet "Value anomaly"

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Andrikopoulos, Panagiotis. An investigation of the value anomaly in the UK stock market 1987-2000. Portsmouth : University of Portsmouth, 2002.

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Warsi, Mohammed Ali. Ebstein anomaly of the tricuspid valve in an adult cohort. Ottawa : National Library of Canada, 1999.

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Anerkennung oder Abwertung : Über die Verarbeitung sozialer Desintegration. Wiesbaden : VS Verlag für Sozialwissenschaften, 2008.

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Bread & spirit : Therapy with the new poor : diversity of race, culture, and values. New York : Norton, 1994.

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Rieber, R. W. Manufacturing social distress : Psychopathy in everyday life. New York : Plenum, 1997.

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Thorne, Sara, et Paul Clift, dir. Ebstein anomaly. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199228188.003.0011.

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Definition 86Incidence 86Associations 86Natural history 86Presenting features in the adult 86Physical signs 88Failure of delamination of the TV leaflets causes apical displacement of the value away from the atrioventricular ring. This leads to: • Atrialization of the proximal part of the RV → enlarged RA....
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Ritzinger, Justin. Anarchy in the Pure Land. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190491161.001.0001.

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Anarchy in the Pure Land investigates the cult of Maitreya, the future Buddha, promoted by the Chinese Buddhist reform movement spearheaded by Taixu as an avenue through which to consider the formation of alternative modernities. The cult presents an apparent anomaly: It shows precisely the kind of concern for ritual, supernatural beings, and the afterlife that much scholarship contends the reformers rejected in the name of “modernity.” This book shows that rather than a concession to tradition, the reimagining of ideas and practices associated with Maitreya was an important site for formulating a Buddhist vision of modernity. To make sense of this it develops a new perspective on alternative modernities by drawing on Charles Taylor’s notion of moral frameworks, arguing that the cult of Maitreya represents an attempt to articulate a new constellation of values that integrates novel understandings of the good clustered around modern visions of utopia with the central Buddhist value of Buddhahood. Part I traces the roots of this constellation to Taixu’s youthful career as an anarchist. Part II examines its articulation in the “Maitreya School’s” theology and the cult’s development from its inception to World War II. Part III examines its subsequent decline and its contemporary legacy within and beyond orthodox Buddhism.
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Thorne, Sara, et Sarah Bowater. Valve and outflow tract lesions. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780198759959.003.0008.

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This chapter discusses valve and outflow tract lesions. It considers left ventricular outflow tract obstruction (LVOTO), including subvalvar aortic stenosis (AS), bicuspid aortic valve, and supravalvar AS. Also discussed are left ventricular inflow lesions, including congenital mitral valve abnormalities, cor triatriatum, and Shone syndrome. It also covers right ventricular outflow tract obstruction (RVOTO), including pulmonary valvar stenosis, supravalvar pulmonary stenosis, pulmonary artery stenosis, pulmonary atresia with intact septum, and double-chambered right ventricle. Ebstein anomaly is also discussed, including incidence, associations, natural history, presenting features in the adult, investigations, and management.
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Archer, Nick, et Nicky Manning. Right-sided abnormalities. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780198766520.003.0011.

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This chapter explores right-sided abnormalities, discussing the venoatrial junction (including both azygous/hemiazygous connections and abnormal systemic venous drainage), the atrioventricular junction (including tricuspid atresia and Ebstein’s anomaly/tricuspid valve dysplasia), and the ventriculoarterial junction (including pulmonary stenosis, pulmonary atresia with intact septum, tetralogy of Fallot, tetralogy of Fallot with absent pulmonary valve, pulmonary atresia with ventricular septal defect, and double outlet right ventricle), and arterial abnormalities.
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Hill, Juniper. Incorporating improvisation into classical music performance. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780199346677.003.0015.

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The paucity of improvisation over the last 150 years of western art music is an anomaly. This chapter discusses why and how classical musicians today might incorporate more improvisation into their practice and performance. Examples from professional musicians demonstrate innovative approaches to classical improvisation as well as methods for renewing historical practices in modern contexts. As a developmental tool, improvisation can be used to deepen understanding of traditional repertoire, improve technique and aural skills, expand expressive possibilities, discover a personal voice, and lessen performance anxiety. Methods for increasing improvisation in public performance are also illustrated, including the preparation of improvised cadenzas in canonical repertoire, the exploration of multiple possible score interpretations, the practice of functional improvisation for church services, and the adventure of boundary-challenging creative acts. The chapter concludes by addressing challenges and constraints faced by potential improvisers in today’s classical music culture, especially in relation to education (when important enabling skill sets are left underdeveloped), career pressures (when deviations from convention are risky) and value systems (when improvisation is considered wrong and the creative capacity of performers is deemed inferior). Classical performers are encouraged to take some of their training into their own hands and assert their right for greater artistic autonomy.
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Chapitres de livres sur le sujet "Value anomaly"

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Davis, Neema, Gaurav Raina et Krishna Jagannathan. « LSTM-Based Anomaly Detection : Detection Rules from Extreme Value Theory ». Dans Progress in Artificial Intelligence, 572–83. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-30241-2_48.

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Digilio, Maria Cristina, Lucia Martina Silvestri, Bruno Dallapiccola et Bruno Marino. « Genetics of Ebstein Anomaly ». Dans The Tricuspid Valve in Congenital Heart Disease, 25–30. Milano : Springer Milan, 2014. http://dx.doi.org/10.1007/978-88-470-5400-4_3.

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Nagdyman, N. « Modified tricuspid repair in patients with Ebstein’s anomaly ». Dans Mitral Valve Repair, 81–88. Heidelberg : Steinkopff, 2011. http://dx.doi.org/10.1007/978-3-7985-1867-4_6.

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Knott-Craig, Christopher J., et T. K. Susheel Kumar. « Ebstein’s Anomaly in the Neonate ». Dans The Tricuspid Valve in Congenital Heart Disease, 31–46. Milano : Springer Milan, 2014. http://dx.doi.org/10.1007/978-88-470-5400-4_4.

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Foresti, Sara, Pierpaolo Lupo et Riccardo Cappato. « Ebstein’s Anomaly and Arrhythmia Management ». Dans The Tricuspid Valve in Congenital Heart Disease, 73–82. Milano : Springer Milan, 2014. http://dx.doi.org/10.1007/978-88-470-5400-4_6.

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Driscoll, David J., et Joseph A. Dearani. « Ebstein Anomaly of the Tricuspid Valve ». Dans Pediatric Cardiovascular Medicine, 509–17. Oxford, UK : Wiley-Blackwell, 2012. http://dx.doi.org/10.1002/9781444398786.ch36.

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Lintermans, J. P. « Ebstein’s anomaly of the tricuspid valve ». Dans Two-dimensional Echocardiography in Infants and Children, 155–61. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4249-3_10.

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Kochav, Jonathan. « Ebstein’s Anomaly of the Tricuspid Valve ». Dans Adult Congenital Heart Disease in Clinical Practice, 371–90. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-67420-9_27.

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Chauvaud, Sylvain, et Andrea Quarti. « Ebstein Anomaly in Adolescents and Young Adults ». Dans The Tricuspid Valve in Congenital Heart Disease, 47–72. Milano : Springer Milan, 2014. http://dx.doi.org/10.1007/978-88-470-5400-4_5.

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Leung, Steve W., et Mushabbar A. Syed. « Ebstein’s Anomaly and Other Tricuspid Valve Anomalies ». Dans Magnetic Resonance Imaging of Congenital Heart Disease, 133–42. London : Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-4267-6_8.

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Actes de conférences sur le sujet "Value anomaly"

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Siffer, Alban, Pierre-Alain Fouque, Alexandre Termier et Christine Largouet. « Anomaly Detection in Streams with Extreme Value Theory ». Dans KDD '17 : The 23rd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining. New York, NY, USA : ACM, 2017. http://dx.doi.org/10.1145/3097983.3098144.

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Zhou, Yu, Yuepeng Cui et Zijian Liu. « Anomaly value detection in intelligent operation and maintenance ». Dans International Conference on Intelligent Systems, Communications, and Computer Networks (ISCCN 2022), sous la direction de Tok Wang Ling. SPIE, 2022. http://dx.doi.org/10.1117/12.2652562.

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Qian, Jing, et Venkatesh Saligrama. « New statistic in P-value estimation for anomaly detection ». Dans 2012 IEEE Statistical Signal Processing Workshop (SSP). IEEE, 2012. http://dx.doi.org/10.1109/ssp.2012.6319713.

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Zhang, Guangyu, Mingming Xu, Yan Zhang et Yanguo Fan. « Improved Hyperspectral Anomaly Target Detection Method Based On Mean Value Adjustment ». Dans 2019 10th Workshop on Hyperspectral Imaging and Signal Processing : Evolution in Remote Sensing (WHISPERS). IEEE, 2019. http://dx.doi.org/10.1109/whispers.2019.8921003.

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Akhriev, Albert, et Jakub Marecek. « Deep Autoencoders with Value-at-Risk Thresholding for Unsupervised Anomaly Detection ». Dans 2019 IEEE International Symposium on Multimedia (ISM). IEEE, 2019. http://dx.doi.org/10.1109/ism46123.2019.00045.

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Boudehenn, Clet, Olivier Jacq, Maxence Lannuzel, Jean-Christophe Cexus et Abdel Boudraa. « Navigation anomaly detection : An added value for Maritime Cyber Situational Awareness ». Dans 2021 International Conference on Cyber Situational Awareness, Data Analytics and Assessment (CyberSA). IEEE, 2021. http://dx.doi.org/10.1109/cybersa52016.2021.9478189.

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Zhang, Yu, et Tianbo Wang. « Applying Value-Based Deep Reinforcement Learning on KPI Time Series Anomaly Detection ». Dans 2022 IEEE 15th International Conference on Cloud Computing (CLOUD). IEEE, 2022. http://dx.doi.org/10.1109/cloud55607.2022.00039.

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Yang, Tao, Wen Chen, Zhengjun Liu et Ping Lin. « A real value negative selection algorithm based on antibody evolution for anomaly detection ». Dans 2018 Tenth International Conference on Advanced Computational Intelligence (ICACI ). IEEE, 2018. http://dx.doi.org/10.1109/icaci.2018.8377545.

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Candra, Arya Dwi, Wahyu Srigutomo, Sungkono et Bagus Jaya Santosa. « A complete quantitative analysis of self-potential anomaly using singular value decomposition algorithm ». Dans 2014 IEEE International Conference on Smart Instrumentation, Measurement and Applications (ICSIMA). IEEE, 2014. http://dx.doi.org/10.1109/icsima.2014.7047419.

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Suboh, Syahirah, et Izzatdin Abdul Aziz. « Anomaly Detection with Machine Learning in the Presence of Extreme Value - A Review Paper ». Dans 2020 IEEE Conference on Big Data and Analytics (ICBDA). IEEE, 2020. http://dx.doi.org/10.1109/icbda50157.2020.9289798.

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Rapports d'organisations sur le sujet "Value anomaly"

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Basu, B., J. M. Retterer, O. de la Beaujardiere, C. E. Valladares et E. Kudeki. Theoretical Relationship Between Maximum Value of the Post-Sunset Drift Velocity and Peak-to-Valley Ratio of Anomaly TEC. Fort Belvoir, VA : Defense Technical Information Center, février 2004. http://dx.doi.org/10.21236/ada423087.

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Metcalf, William G., Marvel C. Stalcup et Marguerite E. Zemanovic. Hydrographic station data : Caribbean Sea, Atlantis II cruise 78 and Knorr cruise 37. Woods Hole Oceanographic Institution, mai 2022. http://dx.doi.org/10.1575/1912/28637.

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During Cruise 37 of the Research Vessel KNORR,91 hydrographic stations were occupied,most of them in the general area of the Windward Passage, eastern Cayman Basin, Mona Passage and across the Caribbean Sea from Puerto Rico to Venezuela. Vertical profiles of potential temperature, salinity, dissolved oxygen and dissolved silicate are presented. The data lists include, in addition to the observed parameters, such computed values as pressure, potential temperature, potential density, specific volume anomaly, sound velocity, dynamic height, potential energy, Vaisala frequency and Vaisala period. Also included in the data lists are 28 hydrographic stations occupied during November 1973 on Cruise 78 of the Research Vessel ATIANTIS II in the Windward Passage, Central Caribbean Sea and the Atlantic Ocean just east of the Lesser Antilles.
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Morris, R., D. M. Jobin, M. D. Thomas, N. Rogers et S R McCutcheon. New gravity data for the Bathurst Mining Camp, northeastern New Brunswick : a colour-shaded Bouguer gravity anomaly map (linear colour contour interval) with gravity station locations and posted Bouguer anomaly values. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2007. http://dx.doi.org/10.4095/223792.

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