Chinese Academy of Sciences

Multi-time scale analysis of loess landform evolution for Dongzhi tableland, southwestern Loess Plateau, China

Study region Dongzhi tableland, southwestern Loess Plateau, eastern Gansu Province, China. Study focus The loess tableland has shrunk greatly over the past thousand years, and this trend is expected to continue. Predictions of loess tableland evolution can support the design and...

Boundary constraints and geometric realizations in holographic $$T\overline{T }$$-deformed BCFT

A bstract We study the intrinsic $$T\overline{T }$$ deformation of boundary conformal field theories from the viewpoint of boundary Ward identities and holographic realizations. We formulate the deformation through the mixed asymptotic variational principle in AdS 3 , which gives...

Tailoring the Optical Properties of MOCVD Grown InGaAs/InAlGaAs MQWs with GaAs Insertion‑Layer

Abstract InGaAs/InAlGaAs multiple quantum wells (MQWs) are widely adoped as the active region of near‑infrared semiconductor lasers due to their excellent optical performance and broad application prospects. In this work, we systematically investigate the effects of the thickness...

Phenotypic evolution of broomcorn millet (Panicum miliaceum) in ancient Turpan, Xinjiang, China

Broomcorn millet ( Panicum miliaceum L.) is a typical dryland cereal and one of the oldest cultivated crops. Unraveling its phenotypic changes during dispersal is crucial for understanding the adaptive evolution of broomcorn millet across different agricultural environments. In t...

Rotational-Stiffness Sensitivity of a Low-Frequency Aeroelastic Branch in a Wingtip-Connected Modular UAV

This study examines how the rotational stiffness of two wingtip interfaces changes the low-frequency aeroelastic response of a free–free, three-module unmanned aerial vehicle. A finite-element model coupled with doublet-lattice aerodynamics is analyzed using the p–k method. The r...

Natural methane emissions feedbacks in MAGICC v. 7.6

Literature estimates of natural methane emissions, particularly from wetlands, have a wide range of uncertainty. Meanwhile, few Earth System Models (ESMs) explicitly model wetlands as a potential source of methane. As a result, Simple Climate Models that aim to emulate the behavi...

Scalable ground-state certification of quantum spin systems via structured noncommutative polynomial optimization

A fundamental challenge in quantum physics is determining the ground-state properties of many-body systems. Whereas standard variational approaches posit a wave-function ansatz and minimize over the possible states expressible by that ansatz, the problem can alternatively be form...

Ambidextrous innovation leap and patent abandonment: A resource orchestration perspective

Patent abandonment can be conceived as a deliberate approach to orchestrate and streamline patent assets, which is often shaped by firms' innovation strategies. This study conceptualizes ambidextrous innovation leap as a strategic reconfiguration of innovation trajectories that r...

Comparative Assessment of Virus Elimination via Direct and Indirect Shoot-Tip Organogenesis in Purple Passion Fruit (Passiflora edulis Sims)

Three viruses, Telosma mosaic virus (TeMV), East Asian passiflora virus (EAPV), and Cucumber mosaic virus (CMV), were found to be widespread in Chinese purple passion fruit (Passiflora edulis Sims) growing regions, with co-infection by these three viruses confirmed in symptomatic...

Testing the strong equivalence principle with multimessenger binary neutron star mergers

Abstract The constancy of the gravitational constant G is a cornerstone of the strong equivalence principle and of general relativity, yet its possible temporal variation remains a key target in tests of fundamental physics. Gravitational-wave (GW) astronomy, especially when comb...

Prussian blue regulates ion dynamics in perovskite solar cells

Perovskite photovoltaics are limited by structural instabilities initiated during crystallization and amplified under operation. We report that a lattice-matched Prussian blue scaffold directs heterogeneous nucleation to produce highly oriented, strain-relaxed films. Its redox-ac...

Postnatal sensorimotor experience causally shapes hemispheric specialization across motor and language networks

The functional organization of the human brain is shaped by the interplay between innate constraints and postnatal experience. Hemispheric specialization, as a fundamental organizing principle of brain function, raises unresolved questions about how postnatal experience shapes la...

Phase‐Engineered V‐Mo‐La Alloying Enables Room‐Temperature Activation and Highly Reversible Hydrogen Storage in TiFe‐Based Alloys

ABSTRACT TiFe‐based AB‐type alloys are among the most promising candidates for solid‐state hydrogen storage, offering high theoretical capacity, moderate plateau pressure, and low raw‐material cost from earth‐abundant constituents. However, their large‐scale deployment remains hi...

Experimental Investigation of Pressure Distribution Evolution During Water Flooding in Tight Sandstone Long Cores

Tight sandstone reservoirs are characterized by complex pore structures and ultra-low permeability, resulting in low recovery efficiency when relying solely on formation elastic energy. Consequently, water flooding is commonly employed for reservoir development. To investigate th...

Size‐Resolved Particle Effective Density in the Free Troposphere at Mt. Hua, China: Influence of Chemical Aging and Sources

Abstract Effective density ( ρ eff ) is a key physical property of atmospheric particles, yet it has rarely been investigated in free tropospheric environments. It is largely determined by chemical compositions and particle morphology, providing valuable insights into atmospheric...

Aberrant salience is selectively associated with ventral midbrain connectivity to the dorsal but not ventral striatum

The dorsal midbrain-striatal dopaminergic stream encodes salience in animals, while it’s unknown in humans. The midbrain-striatal dopaminergic hyperactivity is postulated to attribute aberrantly-heightened salience to ordinary stimuli, forming delusion and hallucination. While an...

Development and validation of a machine learning model integrating clinical and structural brain morphometric features for predicting postherpetic neuralgia: a multicenter cohort study with retrospective development and prospective external validation in China

Postherpetic neuralgia (PHN) is a common and difficult-to-treat complication of herpes zoster (HZ). Early identification of patients at high risk may facilitate risk stratification and individualized intervention. This study aimed to integrate clinical variables with three-dimens...

Exploring efficient Pd-based single-atom catalyst on Sc2CO2 MXene by strain engineering

MXenes have exhibited significant potential in energy storage and conversion technologies for their superior structural stability, rich active sites, and metallic conductivity. We investigated the structural stability and electrocatalytic activity of Pd-doped Sc 2 CO 2 MXene unde...

Nodal-Length Bounds for Surface Metrics with Isolated Non-Analytic Points

We prove a C_g sqrt(lambda) upper bound for nodal lengths on closed surfaces whose metrics are analytic away from finitely many isolated points and satisfy a summable quantitative analytic-scale condition near those points. The result includes an explicit smooth non-analytic toru...

Volcanic Aerosol Forcing Suppresses Tropical African Rainfall: Mechanisms and Modulation by a Warmer Climate

Abstract Volcanic eruptions are among the most abrupt natural forcings of the climate system and can induce pronounced hydroclimatic disruptions, particularly in monsoon‐influenced regions. Using a 30‐member CESM ensemble, we examine how the 1815 Tambora‐size eruption would affec...