Results 81 to 90 of about 1,031,036 (328)

Raytracing Simulated GPS Radio Wave Propagation Paths Experiencing Large Disturbances When Going through the Top of the Sub-Cloud Layer

open access: yesRemote Sensing, 2021
Global positioning satellite system (GPS) radio waves that reach the tropical lower troposphere are strongly affected by small-scale water vapor fluctuations.
Shengpeng Yang   +2 more
doaj   +1 more source

Data Assimilation: A Mathematical Introduction [PDF]

open access: yes, 2015
These notes provide a systematic mathematical treatment of the subject of data ...
Law, K. J. H.   +2 more
core  

Initiation of ensemble data assimilation [PDF]

open access: yesTellus A: Dynamic Meteorology and Oceanography, 2006
The specification of the initial ensemble for ensemble data assimilation is addressed. The presented work examines the impact of ensemble initiation in the Maximum Likelihood Ensemble Filter (MLEF) framework, but is also applicable to other ensemble data assimilation algorithms.
Bahri Uzunoglu   +7 more
openaire   +3 more sources

Multi‐Omics Analysis Reveals Impacts of LincRNA Deletion on Yeast Protein Synthesis

open access: yesAdvanced Science, EarlyView.
This study demonstrates that the deletion of specific lincRNAs in yeast affects protein secretion. An engineered yeast strain, with multiple genetic modifications including lincRNA deletion, achieves a high yield of 4.1 g L⁻1 in fed‐batch cultivation.
Ling Qin   +8 more
wiley   +1 more source

Progress, challenges, and future steps in data assimilation for convection‐permitting numerical weather prediction: Report on the virtual meeting held on 10 and 12 November 2021

open access: yesAtmospheric Science Letters, Volume 24, Issue 1, January 2023., 2023
We report on a meeting on progress and challenges in convection‐permitting data assimilation. Novel developments include the assimilation of novel observations such as cloud‐affected satellite radiances, ground‐based profiling networks and aircraft data, as well as methodological advancements in error covariance modelling, and progress in operational ...
Guannan Hu   +7 more
wiley   +1 more source

Particle Filters and Data Assimilation [PDF]

open access: yesAnnual Review of Statistics and Its Application, 2018
State-space models can be used to incorporate subject knowledge on the underlying dynamics of a time series by the introduction of a latent Markov state process. A user can specify the dynamics of this process together with how the state relates to partial and noisy observations that have been made.
Fearnhead, Paul, Künsch, Hans
openaire   +3 more sources

Developing Quorum Sensing‐Based Collaborative Dynamic Control System in Halomonas TD01

open access: yesAdvanced Science, EarlyView.
A standardized and streamlined inducer‐free quorum sensing (QS)‐based collaborative dynamic control pattern is developed for sufficient gene expression control in Halomonas TD by mixing two engineered cells, cells A and B. Proof‐of‐concept studies are designed to test the dynamic control performance in mixed cultures in fed‐batch conditions.
Yi‐Na Lin   +12 more
wiley   +1 more source

Dynamics and predictability of secondary eyewall formation in sheared tropical cyclones

open access: yesJournal of Advances in Modeling Earth Systems, 2017
This study examines the predictability and dynamics of tropical cyclone (TC) secondary eyewall formation (SEF), eyewall replacement cycles (ERC), and intensity changes under moderate environmental shear through convection‐permitting ensemble simulations.
Fuqing Zhang   +3 more
doaj   +1 more source

A Time-parallel Approach to Strong-constraint Four-dimensional Variational Data Assimilation

open access: yes, 2015
A parallel-in-time algorithm based on an augmented Lagrangian approach is proposed to solve four-dimensional variational (4D-Var) data assimilation problems.
Rao, Vishwas, Sandu, Adrian
core   +1 more source

On the mathematics of data assimilation

open access: yesTellus, 1981
The problem of convergence of a “forward-backward” assimilation is considered for the most general dynamical system. Using elementary techniques of stability theory, it is shown that the variation, over one assimilation cycle, of the difference between the assimilating model and the state to be reconstructed is, to the first order, determined by a ...
openaire   +3 more sources

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