scholarly journals State, global and local parameter estimation using local ensemble Kalman filters: applications to online machine learning of chaotic dynamics

2021 ◽  
Author(s):  
Quentin Malartic ◽  
Marc Bocquet ◽  
Alban Farchi
Keyword(s):  
Surrogate Model ◽  
The State ◽  
Local Parameter ◽  
Lorenz Model ◽  
Ensemble Kalman Filters ◽  
Non Local ◽  
State And Local ◽  
Covariance Localisation ◽  
Global And Local ◽  
Local Parameters

<div>In a recent methodological paper, we have shown how a (local) ensemble Kalman filter can be used to learn both the state and the dynamics of a system in an online framework. The surrogate model is fully parametrised (for example, this could be a neural network) and the update is a two-step process: (i) a state update, possibly localised, and (ii) a parameter update consistent with the state update. In this framework, the parameters of the surrogate model are assumed to be global. <br><br>In this presentation, we show how to extend the method to the case where the surrogate model, still fully parametrised, admits both global and local parameters (typically forcing parameters). In this case, localisation can be applied not only to the state update, but also to the local parameters update. This results in a collection of new algorithms, depending on the localisation method (covariance localisation or domain localisation) and on whether localisation is applied to the state update, or to both the state and local parameter update. The algorithms are implemented and tested with success on the 40-variable Lorenz model. Finally, we show a two-dimensional illustration of the method using a multi-layer Lorenz model with radiance-like non-local observations.</div>

Bienvenidos a Norte Carolina

2018 ◽  
pp. 65-98
Author(s):  
Hannah Gill
Keyword(s):  
North Carolina ◽  
Latin American ◽  
The State ◽  
Local Economies ◽  
Local Factors ◽  
North Carolinians ◽  
State And Local ◽  
Latin American Immigration ◽  
Global And Local

Chapter 3 takes up the story of contemporary Latin American immigration to North Carolina from the 1970s to the present. The chapter seeks to answer such questions as what Latin American migrant and refugee groups are currently moving to North Carolina and why? Where do they come from? What global and local factors precipitate and sustain migration to the state? How has immigration affected state and local economies? How do native North Carolinians play a role in these processes, and how do they perceive immigrants?

Is This the Care We Need?: An Examination of Childcare Policy in Pennsylvania

Commonwealth ◽  
2017 ◽  
Vol 19 (2) ◽  
Author(s):  
Jennie Sweet-Cushman ◽  
Ashley Harden
Keyword(s):  
United States ◽  
Child Care ◽  
Current System ◽  
The United States ◽  
The State ◽  
Federal State ◽  
Women And Politics ◽  
Richard Nixon ◽  
State And Local ◽  
Childcare Policy

For many families across Pennsylvania, child care is an ever-present concern. Since the 1970s, when Richard Nixon vetoed a national childcare program, child care has received little time in the policy spotlight. Instead, funding for child care in the United States now comes from a mixture of federal, state, and local programs that do not help all families. This article explores childcare options available to families in the state of Pennsylvania and highlights gaps in the current system. Specifically, we examine the state of child care available to families in the Commonwealth in terms of quality, accessibility, flexibility, and affordability. We also incorporate survey data from a nonrepresentative sample of registered Pennsylvania voters conducted by the Pennsylvania Center for Women and Politics. As these results support the need for improvements in the current childcare system, we discuss recommendations for the future.

Effectiveness of Tax Policy of Ukraine: Evidence and Economy Implications

2020 ◽  
pp. 124-131
Author(s):  
Olena P. Slavkova ◽  
Oksana I Zhilinska ◽  
Maksym Palienko
Keyword(s):  
Economic Development ◽  
Tax Evasion ◽  
Tax Policy ◽  
The State ◽  
State Budget ◽  
Advantages And Disadvantages ◽  
State Tax ◽  
State And Local ◽  
Tax Payments

The article deals with the peculiarities of the formation and implementation of tax policy in the country. The analysis of change of tax receipts to the state and local budgets is carried out. The role of tax payments in the economic development of the country is determined. The efficiency of the state tax policy in Ukraine is analyzed, its advantages and disadvantages are determined. The important role of tax payments in stimulating economic and social development is substantiated. The analysis of the elasticity of change of indicators of economic development of the country from the change of volume of tax receipts to the budget is carried out. The necessity of improving the existing policy of establishing, accrual, payment, and distribution of tax revenues as one of the most promising areas to stimulate economic growth is concluded. Keywords: tax policy, revenues, tax evasion, state budget, elasticity, economic development

Combating Problems in Teaching State and Local Government

1981 ◽  
Vol 29 ◽  
pp. 19-20
Author(s):  
Mary H. Waite
Keyword(s):  
Community Colleges ◽  
Comparative Analysis ◽  
Local Government ◽  
Political Science ◽  
Public Universities ◽  
The State ◽  
State And Local Government ◽  
State And Local ◽  
Science Instructors

Because many political science instructors come from another region or state; they feel insufficiently informed in teaching about the state and local government wherein they presently reside. Consequently, instructors generalize about these governments. Yet in many public universities and community colleges, students find the politics in their area pertinent and care less for comparative analysis. In truth, the students probably have a valid point, since the majority will reside in the state where they are attending college.

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