Chinese Academy of Sciences

The semiclassical limit of the Dirac equation

The aim of this note is to present a general overview of the linear stability and instability of shear layers near a boundary for both the incompressible Euler and Navier-Stokes equations.

Exogenous SA- and IAA-Mediated Regulation of Silique Growth and Development in Isatis indigotica

Isatis indigotica Fort.—a well-known medicinal cruciferous species—is the source plant of Isatidis Radix and Folium Isatidis, and is widely cultivated for medicinal raw material. The silique serves as the propagative organ for seed production of I. indigotica, and its development...

Protocol for measuring above-threshold ionization spectra driven by few-cycle laser pulses in frustrated tunneling ionization regime

Above-threshold ionization (ATI) spectra in the frustrated tunneling ionization (FTI) regime demonstrate control of bound-state populations via the carrier-envelope phase (CEP). Here, we present a protocol for acquiring ATI spectra from argon gas driven by few-cycle laser pulses....

Global non-selfsimilar Riemann solutions for multi-dimensional scalar conservation laws with time-dependent nonlinear source terms

In this paper, we are concerned with the global non-selfsimilar Riemann solutions for the multi-dimensional scalar conservation law with a time-dependent nonlinear source term 𝑔 ⁡ ( 𝑡 , 𝑢 ) , where the Riemann-type initial data consist of two constant states separated by a curved...

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...

SWCNTs/PEDOT:PSS-modified microelectrode arrays reveal striatal–hippocampal neural encoding of movement initiation and place fields during goal-directed navigation

Goal-directed navigation necessitates coordinated interactions among multiple brain regions, with the hippocampus and striatum playing critical roles in spatial representation, movement-related information, and reward-related evaluation. The hippocampus, particularly the cornu am...

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...

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...

Tetrandrine-loaded manganese-doped ceria nanozyme for nebulized inhalation therapy of the ROS-driven inflammatory-fibrotic continuum

Pulmonary fibrosis (PF) and acute lung injury (ALI) represent mechanistically interrelated stages along a shared inflammatory-fibrotic disease continuum, both driven by dysregulated macrophage responses and reactive oxygen species (ROS)-mediated signaling. Effective intervention...

ProtoSurv: prototype-guided adaptation of computed tomography foundation model for lung-cancer prognosis prediction

Abstract Prognosis prediction is important for precision treatment in lung cancer. Chest computed tomography (CT) and deep learning are feasible approaches for learning imaging-based prognostic representations. However, prognostic labels are difficult to obtain because survival e...

HCMV US30 induces TMED10-DRP1-mediated mitochondrial fission and apoptosis to promote viral multiplication

Human cytomegalovirus (HCMV) hijacks host components to modulate cell death for its optimized replication and dissemination. We identified HCMV US30 as a viral factor that induces caspase-dependent apoptosis. US30 induces both DRP1-dependent mitochondrial fission and subsequent a...

Ultrasonic Vibration Assisted Laser Processing: A Hybrid Paradigm for Extreme Surface Enhancement

ABSTRACT Traditional laser processing techniques offer many advantages, but they often encounter limitations such as heat‐affected zones, recast layers, residual tensile stresses, and poor surface finish. The integration of ultrasonic vibration (UV) presents a promising hybrid ap...

Multi-Step Obstruction Reasoning for Target-Oriented Grasp Sequence Generation in Cluttered Scenes

Retrieving target objects in severe clutter requires multi-step reasoning to establish valid obstacle removal sequences. While recent Vision–Language Models (VLMs) have advanced instruction-driven clutter grasping, existing paradigms lack explicit construction of graph-constraine...

Regulatory Mechanisms Underlying Flavonoid-Mediated Restructuring of the Rhizosphere Microbiome in Alfalfa (Medicago sativa L.) Under Salt Stress

This study employed two Medicago sativa L. varieties with contrasting salt tolerance—Zangmu No.1 (ZM1, salt-tolerant) and Zangmu No.2 (ZM2, salt-sensitive)—to investigate root exudate composition, rhizosphere microbiome assembly, and their potential correlations under 0 mM, 100 m...

The role of permafrost at Zonag Lake with its 2011 outburst: Insights from long-term and short-term perspectives

Lakes across the Qinghai-Tibet Plateau (QTP) are experiencing widespread and accelerated expansion, with Zonag Lake representing an extreme case following its catastrophic overflow and outburst in 2011. However, the characteristics and changes of permafrost extensively distribute...

Concurrent Eurasian Heatwaves Will Intensify Beyond the Mean Warming

Abstract Concurrent heatwaves over Europe and North China are the most frequent compound heat extremes across the Northern Hemisphere. They are systematically organized by a recurrent teleconnection along the polar front jet over Eurasia. Using observations and large‐ensemble sim...

Application and prospects of high-temperature heat pipe technology in concentrating solar thermal collector systems

Against the backdrop of global energy transition, concentrated solar thermal (CST) collector systems offer efficient conversion of solar energy into high-grade thermal energy, representing a critical pathway for renewable energy development. However, the synergistic enhancement o...

Bacterial Diversity and Community Assembly in Deep-Sea Sediments: Observations from the Philippine Sea

Microorganisms are important components of marine ecosystems and are widely distributed across global marine sediments. Although studies on microbial communities in deep-sea sediments have been increasing worldwide, research in the Philippine Sea is still at an early stage. In th...

Contrasting rice-dryland crop rotation regimes drive divergent greenhouse gas emissions via labile organic carbon modulation, with trade-offs for crop yield

Context Optimizing crop rotations is essential for synergistically increasing yield and reducing environmental impacts. However, in rice-dryland crop rotation systems, the underlying mechanisms through which different dry-season crops influence subsequent rice yield and greenhous...