Pyrovanadates are deemed as an ideal class of potential Calcium ion storage hosts, owing to abundant confined species. However, the higher Coulombic hinderance brings about more sluggish diffusion kinetics of charge carriers. Therefore, an allelic reconfiguration is proposed for the activity-limited zinc sites, and a novel solid-solution phase copper/zinc pyrovanadate for calcium-ion host is prepared. Combining theoretical calculations with experiments, the feasibility of the solid solution phase host for high-performance reversible calcium-ion storage is clarified.

In a paper published in Science Bulletin, an international team of scientists examined the extent changes in China’s wetlands from 1980 to 2020 and highlighted the hidden loss and restoration effects based on China_Wetlands product. This consistent dataset (i.e., China_Wetlands) has been created by applying the HOHC method to over 53,000 Landsat images acquired in six time periods from 1980 to 2020.

In a paper published in National Science Review, scientists present evidences that tidal forces have a significant impact on temporal variations in seismic velocity within fault fracture zones.

Scientists developed a high-entropy hydrogel that stiffens 760-fold when heated and softens in 28 seconds upon cooling. This innovation overcomes slow recovery in thermal-stiffening materials, unlocking applications in adaptive armor and soft robotics.

Purpose

We estimate the marginal cost curve of each dealer in each auction, based on structural models of the multiunit discriminatory-price auction.

Design/methodology/approach

Auction theory has ambiguous implications regarding the relative performance of three formats of multiunit auctions: uniform-price, discriminatory-price and Vickrey auctions. We evaluate the performance of these three auction formats using bid-level data of the Federal Reserve’s purchase auctions of agency MBS from June 2014 through November 2014.

Findings

Our results suggest that neither uniform-price nor Vickrey auctions outperform discriminatory-price auctions in terms of the total expenditure. However, Vickrey auctions outperform discriminatory-price auctions in terms of efficiency, with the efficiency gain around 0.74% of the surplus that dealers extract on average.

Originality/value

To the best of our knowledge, this paper provides the first structural analysis of the auctions used by the Federal Reserve in implementing its monetary policies.

In a paper published on aBIOTECH, the authors investigated the impacts of glyphosate-tolerant maize GG2 cultivation and herbicide application on rhizosphere bacterial and fungal communities through soil microbiome analysis, offering critical guidance for sustainable biotech crop adoption.

Understanding the spatio-temporal patterns of taxi operations is crucial for urban transport planning and management. A recent study by researchers from Shandong University of Science and Technology and the Chinese Academy of Sciences introduces a novel model, the Taxi Mobility Chain (TMC), to analyze the continuous movement patterns of taxis in Xiamen, China. By comparing traditional taxis and e-hailing cars, the study reveals significant differences in their operational behaviors, providing valuable insights for optimizing urban transportation systems.

Although deep learning–based remote sensing interpretation has become increasingly prominent, the industry still lacks a thorough review on how to ensure that automatically extracted results meet both “cartographic-level” precision and relevant standards. A recent paper published in the Journal of Geo-information Science by a team from the Aerospace Information Research Institute, Chinese Academy of Sciences, highlights the concept of “cartographic-level vector elements” and provides a comprehensive overview of its definition, evaluation methods, rule constraints, current research progress, and future directions.