نتایج جستجو برای: theil indicator

تعداد نتایج: 75946  

2016
Eyal Seidemann Yuzhi Chen Yoon Bai Spencer C Chen Preeti Mehta Bridget L Kajs Wilson S Geisler Boris V Zemelman

Understanding the neural basis of behaviour requires studying brain activity in behaving subjects using complementary techniques that measure neural responses at multiple spatial scales, and developing computational tools for understanding the mapping between these measurements. Here we report the first results of widefield imaging of genetically encoded calcium indicator (GCaMP6f) signals from...

Journal: :J. Informetrics 2017
Giacomo Vaccario Matus Medo Nicolas Wider Manuel Sebastian Mariani

It is widely recognized that citation counts for papers from different fields cannot be directly compared because different scientific fields adopt different citation practices. Citation counts are also strongly biased by paper age since older papers had more time to attract citations. Various procedures aim at suppressing these biases and give rise to new normalized indicators, such as the rel...

Journal: :Neuron 2016
Eftychios A. Pnevmatikakis Daniel Soudry Yuanjun Gao Timothy A. Machado Josh Merel David Pfau Thomas Reardon Yu Mu Clay Lacefield Weijian Yang Misha Ahrens Randy Bruno Thomas M. Jessell Darcy S. Peterka Rafael Yuste Liam Paninski

We present a modular approach for analyzing calcium imaging recordings of large neuronal ensembles. Our goal is to simultaneously identify the locations of the neurons, demix spatially overlapping components, and denoise and deconvolve the spiking activity from the slow dynamics of the calcium indicator. Our approach relies on a constrained nonnegative matrix factorization that expresses the sp...

Journal: :تحقیقات آب و خاک ایران 0
فرشاد فتحیان دانشگاه تربیت مدرس سعید مرید دانشگاه تربیت مدرس

global warming has brought about changes in meteorological variable time series. these changes, accompanied with serious human intervention in nature, has resulted in hydrological changes. so the effects can be tracked down by the trend of the time series. the purpose of this study is to analyze and compare the monthly and annual trends of temperature, precipitation as well as stream flow time ...

2015
Qiang Yao Chaojie Liu J. Adamm Ferrier Zhiyong Liu Ju Sun

OBJECTIVE To assess the impact of the National Essential Medicines Scheme (NEMS) with respect to urban-rural inequalities regarding drug prescriptions in primary care facilities. METHODS A stratified two-stage random sampling strategy was used to sample 23,040 prescriptions from 192 primary care facilities from 2009 to 2010. Difference-in-Difference (DID) analyses were performed to test the a...

Journal: :The Journal of Laryngology, Rhinology, and Otology 1896

Journal: :Frontiers in Ecology and Evolution 2022

A cropland system is one of the most sensitive socio-ecological systems to climate change, such as drought and flood. Facing frequent extreme weather events worldwide, how improve resilience change (CSRCC) thus ensure food production has been concerned. Although a small number studies have attempted evaluate CSRCC through single or multiple indicators, few considered perspective three basic cap...

2011
Martin Gächter Engelbert Theurl

INTRODUCTION Health is an important dimension of welfare comparisons across individuals, regions and states. Particularly from a long-term perspective, within-country convergence of the health status has rarely been investigated by applying methods well established in other scientific fields. In the following paper we study the relation between initial levels of the health status and its improv...

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