نتایج جستجو برای: rating curve

تعداد نتایج: 172591  

Journal: :Modeling Earth Systems and Environment 2023

Abstract Land use and water resource management influence the suspended sediment concentration (SSC) in rivers. Fine sediments are an important driver for river development, even coarse-material-rich In this study, rating curve approach is modified to predict SSC several river-km downstream of a sampling site. Further, prediction improved by adding input, storage, dilution effects through relev...

Journal: :Movement disorders : official journal of the Movement Disorder Society 2014
Albert F G Leentjens Kathy Dujardin Gregory M Pontone Sergio E Starkstein Daniel Weintraub Pablo Martinez-Martin

Existing anxiety rating scales have limited construct validity in patients with Parkinson's disease (PD). This study was undertaken to develop and validate a new anxiety rating scale, the Parkinson Anxiety Scale (PAS), that would overcome the limitations of existing scales. The general structure of the PAS was based on the outcome of a Delphi procedure. Item selection was based on a canonical c...

Journal: :Assessment 2009
John Ruscio Timothy A Brown Ayelet Meron Ruscio

Most taxometric studies of depressive constructs have drawn indicators from self-report instruments that do not bear directly on the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV) diagnostic construct of major depressive disorder (MDD). The present study examined the latent structure of MDD using indicator sets constructed from a semistructured clinical interview, s...

2011
Kenneth W. Regan Bartlomiej Macieja Guy Haworth

This paper studies the population of chess players and the distribution of their performances measured by Elo ratings and by computer analysis of moves. Evidence that ratings have remained stable since the inception of the Elo system in the 1970’s is given in several forms: by showing that the population of strong players fits a simple logistic-curve model without inflation, by plotting players...

Journal: :Environmental Modelling and Software 2014
Gianbattista Bussi Félix Francés Juan José Montoya Pierre Y. Julien

The importance of initial sediment conditions on model calibration and validation is analysed. A sediment model was calibrated and validated under three different initial sediment conditions: (0) no sediment availability, (1) calibration of the initial sediment condition and (2) using a warm-up simulation. The model results were assessed in terms of the graphic of fine sediment transport, or se...

Journal: :The American journal of psychiatry 2004
Mark Zimmerman Michael A Posternak Iwona Chelminski

OBJECTIVE Some have suggested that standardized rating scales be used in clinical practice to monitor the course of treatment; however, the time demands of clinical practice make it difficult to use such measures. This study derived a cutoff on a self-report depression questionnaire corresponding to the most widely used definition of remission (a score < or =7 on the 17-item Hamilton Depression...

2004
Robert M Hirsch John E Costa

Stream flow information is essential for many important uses across a broad range of scales, including global water balances, engineering design, flood forecasting, reservoir operations, navigation, water supply, recreation, and environmental management. Growing populations and competing priorities for water, including preservation and restoration of aquatic habitat, are spurring demand for mor...

2004
Kaiqin Xu Jiqun Zhang Masataka Watanabe Chunpeng Sun

The measurement of river discharge is necessary for understanding many water-related issues. Traditionally, river discharge is estimated by measuring water stage and converting the measurement to discharge by using a stage–discharge rating curve. Our proposed method for the first time couples the measurement of water-surface width with river width–stage and stage–discharge rating curves by usin...

ژورنال: علوم آب و خاک 2017

Soil erosion is undoubtedly one of the most important problems in natural areas of Iran and has destructive effects on different ecosystems. Considering that calculation of the sediment rate in sediment stations and direct measurements of erosion process is costly and difficult, it is critical to find ways to accurately estimate the amount of sediment yield in catchments especially in arid and ...

2015
Stephanie Fryar-Williams Jörg E. Strobel

Background: Neuroscience can assist clinical understanding and therapy by finding neurobiological markers for mental illness symptoms. Objectives: To quantify biomarkers for schizophrenia and schizoaffective disorder and relate these to discrete symptoms of psychosis. Methods: Within a case-control design with multiple exclusion criteria to exclude organic causes and confounding variables, 67 D...

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