نتایج جستجو برای: الگوی var

تعداد نتایج: 69704  

Journal: :Bioresource technology 2007
M Sugai N Takakuwa M Ohnishi I Arai T Urashima Y Oda

From 2150 isolates from raw milk and milk products, yeast strains were surveyed to produce glucosylceramide from cheese whey. Most of the 54 strains that had accumulated a detectable amount of glucosylceramide were identified as Kluyveromyces lactis var. lactis. The cells of K. lactis var. lactis strain M-11 derived from domestic raw milk accumulated glucosylceramide 2.5-fold higher than K. lac...

2012
Bo Wang You Li Junzo Watada

In this study, we propose an improved fuzzy multi-objective portfolio selection model (VaR-MOPSM) with distinct risk measurements. The VaR-MOPSM can precisely evaluate the investment and increase the probability of obtaining the expected return. When building the model, fuzzy Value-at-Risk (VaR), which can directly reflect the greatest loss of a selection case under a given confidence level, is...

2015
Magda Gregorova Alexandros Kalousis St'ephane Marchand-Maillet

While the importance of Granger-causal (G-causal) relationships for learning vector autoregressive models (VARs) is widely acknowledged, the state-of-theart VAR methods do not address the problem of discovering the underlying Gcausality structure in a principled manner. VAR models can be restricted if such restrictions are supported by a strong domain theory (e.g. economics), but without such s...

2011
Peter Youngman

simply stated, a vaR model is a model of the distribution of future profits and losses of a bank’s trading portfolio. vaR models combine information on a bank’s trading positions across various products with statistical estimations of the probability distribution of the underlying market factors and their relation to each other. the final output of a vaR model is a vaR estimate, which is define...

Journal: :Cell 2005
Lucio H. Freitas-Junior Rosaura Hernandez-Rivas Stuart A. Ralph Dvorak Montiel-Condado Omar K. Ruvalcaba-Salazar Ana Paola Rojas-Meza Liliana Mâncio-Silva Ricardo J. Leal-Silvestre Alisson Marques Gontijo Spencer Shorte Artur Scherf

Malaria parasites use antigenic variation to avoid immune clearance and increase the duration of infection in the human host. Variation at the surface of P. falciparum-infected erythrocytes is mediated by the differential control of a family of surface antigens encoded by var genes. Switching of var gene expression occurs in situ, mostly from telomere-associated loci, without detectable DNA alt...

2012
Robert P. Adams Fatemeh Hojjati

Sequence data from four gene regions (nrDNA, petN-psbM, trnD-trnT, trnS-trnG, 3,705 bp) revealed that junipers from the southern mountain ranges of Iran are very diverse. The combined NJ tree (3,705 bp) showed strong support for the distinct nature of J. excelsa, J. polycarpos, J. p. var. turcomanica, and J. p. var. seravschanica. The samples from NW Iran are J. polycarpos and samples from NE I...

2008
Gordon J. Alexander Alexandre M. Baptista Shu Yan

Recognizing the drawbacks of Value-at-Risk (VaR), researchers have advocated the use of Conditional Value-at-Risk (CVaR). However, the current popularity of VaR and Stress Testing (ST) among bank regulators raises the question of whether a risk management system based on both VaR and ST constraints is an effective alternative to a system based on CVaR. We show that when the VaR and ST bounds ar...

ژورنال: :دانش کشاورزی وتولید پایدار 2010
بهنام بهتری ذبیح الله نعمتی حمید حسن پور جواد رضاپور فرد

احتمالاً سبز شدن نهالبذر یکی از مهم­ترین رویدادهای فنولوژیکی است که موفقیت گیاهان زراعی یک ساله را تحت تاثیر قرار می­دهد. تحقیقات بسیاری در سال­های اخیر برای پیش­بینی الگوی سبز نهالبذر گیاهان زراعی و علف­های هرز برای رسیدن به اهداف مختلف صورت گرفته است. استفاده از مدل­های رگرسیونی غیر خطی یکی از روش­هایی است که به منظور بررسی الگوی سبز نهالبذر گونه­های زراعی و علف هرز به صورت تابعی از زمان به کا...

2012
Yair Fastman Robert Noble Mario Recker Ron Dzikowski

Antigenic variation in Plasmodium falciparum is regulated by transcriptional switches among members of the var gene family, each expressed in a mutually exclusive manner and encoding a different variant of the surface antigens collectively named PfEMP1. Antigenic switching starts when the first merozoites egress from the liver and begin their asexual proliferation within red blood cells. By era...

Journal: :NeuroImage 2012
Cristina Gorrostieta Hernando Ombao Patrick Bédard Jerome N. Sanes

We propose a mixed-effects vector auto-regressive (ME-VAR) model for studying brain effective connectivity. One common approach to investigating inter-regional associations in brain activity is the multivariate auto-regressive (VAR) model. The standard VAR model unrealistically assumes the connectivity structure to be identical across all participants in a study and therefore, could yield misle...

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