Category: 7. Maths
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A novel method for Pu-erh tea face traceability identification based on improved MobileNetV3 and triplet loss
Data acquisition The image data for this study were collected from a Pu-erh tea cake production plant in Puer city, Yunnan Province, China (22.78°N, 100.91°E). Two types of equipment were used to photograph each tea cake: a mobile phone (HONOR 50) and a High-Speed photographic apparatus (Eloam High-Speed Portable HD DocScanner S820A3AF). The purpose was…
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Feasibility of neural network metamodels for emulation and sensitivity analysis of radionuclide transport models
When assessing \({^{137}}\)Cs transportation in groundwater in the Hanford case, the relationship between the free-water concentration and the pore-water concentration was determined in a laboratory experiment. The experiment was performed with Hanford sand packed in glass cylinders (length 7.2 cm and inner diameter 1.0 cm) using NaCl water solution to simulate the Hanford tank content.…
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Translating intersectionality to fair machine learning in health sciences
Collins and Bilge2 articulate six core ideas for intersectionality (Table 1). For illustration, we consider the hypothetical task of predicting cardiovascular events among a cohort of US hospital patients inclusive of Black transgender women. The first two ideas — social inequality and intersecting power relations — are best understood together. In relation to our task,…
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Cross-modal autoencoder framework learns holistic representations of cardiovascular state
Our research complies with all relevant ethical regulations. Access was provided under UK Biobank application #7089. Analysis was approved by the Broad Institute institutional review board. Study design All analyses were performed on the UK Biobank, a prospective cohort of over 500,000 healthy adults that were aged 40–69 during enrollment, which took place from 2006…
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These worms can escape tangled blobs in an instant. Here’s how
Like tiny, wriggling Houdinis, California blackworms are master escape artists. Groups of the worms work themselves into gnarly tangles but they can undo the knots in just tens of milliseconds. Now scientists have teased out how they do it. Found in ponds and other standing water, California blackworms (Lumbriculus variegatus) interlace themselves into clumps to…
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How to untangle a worm ball: Mathematicians solve a knotty mystery | MIT News
As anyone who has ever unwound a string of holiday lights or detangled a lock of snarled hair knows, undoing a knot of fibers takes a lot longer than tangling it up in the first place. This is not so for a wily species of West Coast worm. Found in marshes, ponds, and other shallow…
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Statistical physics reveals how languages evolve
Charting the survival of linguistic structures. Credit: The European Physical Journal B (2023). DOI: 10.1140/epjb/s10051-023-00488-0 Models based on the principles of statistical physics can provide useful insights into how languages change through contact between speakers of different languages. In particular, the analysis reveals how unusual linguistic forms are more likely to be replaced by more…
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Math unlocks molecular interactions that open window to how life evolved
A CRN containing the antithetic integral control motif as a subnetwork. a Closed-loop system for an antithetic integral controller (X1, X2), along with an interconnected auxiliary controller (X3, O1). Created with BioRender.com. b Chemical reactions for the CRN. c The CRN implements integral control via two independent internal models, corresponding to two independent polynomial invariants,…
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Modelling the effects of social distancing, antiviral therapy, and booster shots on mitigating Omicron spread
Data From February 26, 2021 to December 31, 2022, we compiled the data on confirmed cases, severe cases, primary vaccinations, and booster vaccinations8. In the parameter estimation period (February 26, 2021 to February 3, 2022), we utilized the data on confirmed cases, primary and booster vaccinations. For the prediction period (February 3, 2022 to December…
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Analysis of fractional order model on higher institution students’ anxiety towards mathematics with optimal control theory
In this section, we re-formulate the higher institutions students anxiety towards mathematics model (Eq. 9) using a Caputo fractional order derivative approach in order to observe the memory effects and gain more insights about the dynamics of higher institutions students anxiety towards mathematics. System (9) in terms of integral form is followed by substituting the…