Publications (19)
Exact closed-form solutions for Lamb's problem (III): The case for buried source and receiver
Xi Feng, Haiming Zhang
In this article, we derive the exact closed-form solution for the displacement in the interior of an elastic half-space due to a buried point force with Heaviside step function tim…
Electric-Magnetic-Switchable Free-Space Skyrmions in Toroidal Light Pulses via a Nonlinear Metasurface
Li Niu, Xi Feng, Xueqian Zhang +10
Recent advances reveal that light propagation in free space supports many exotic topological textures, such as skyrmions. Their unique space-time topologies make them promising can…
Exact Closed-form Solutions for Lamb's Problem
Xi Feng, Haiming Zhang
In this article, we report on an exact closed-form solution for the displacement at the surface of an elastic half-space elicited by a buried point source that acts at some point u…
Magnetic criticality-enhanced hybrid nanodiamond-thermometer under ambient conditions
Ning Wang, Gang-Qin Liu, Weng-Hang Leong +10
Nitrogen vacancy (NV) centres in diamond are attractive as quantum sensors owing to their superb coherence under ambient conditions. However, the NV centre spin resonances are rela…
Metric Matrix in Barycentric Coordinates
Xi Feng
In this paper, the concept of the metric matrix is introduced to establish a concise and unified formulation for the inner product in barycentric coordinates. Building on this fram…
AutoPatent: A Multi-Agent Framework for Automatic Patent Generation
Qiyao Wang, Shiwen Ni, Huaren Liu +8
As the capabilities of Large Language Models (LLMs) continue to advance, the field of patent processing has garnered increased attention within the natural language processing comm…
Nanodiamond sensing in dynamic environments with fast-tracking through four-point positioning
Guoli Zhu, Ming-Zhong Ai, Zhiyu Zhao +8
Nitrogen-vacancy (NV) centers in nanodiamonds are excellent nanoscale sensors for measuring parameters such as temperature, magnetic field, and viscosity in complex fluidic environ…
Quantum coherence control at near 1000 K
Gang-Qin Liu, Xi Feng, Ning Wang +2
Quantum coherence control usually requires extremely low temperature environments. Even for spins in diamond, a remarkable exception, the coherence signal is lost as temperature ap…
A Metric Framework for Triangle Inequalities via Barycentric Coordinates
Xi Feng
This paper presents a unified metric-based framework for triangle geometric inequalities using barycentric coordinates. By interpreting classical inequalities as squared distances…
Zero-field magnetometry using hyperfine-biased nitrogen-vacancy centers near diamond surfaces
Ning Wang, Chu-Feng Liu, Jing-Wei Fan +7
Shallow nitrogen-vacancy (NV) centers in diamond are promising for nano-magnetometry for they can be placed proximate to targets. To study the intrinsic magnetic properties, zero-f…
Exact closed-form solutions for Lamb's problem (II): a moving point load
Xi Feng, Haiming Zhang
In this article, we report on an exact closed-form solution for the displacement in an elastic homogeneous half-space elicited by a downward vertical point source moving with const…
Ultra-sensitive hybrid diamond nanothermometer
Chu-Feng Liu, Weng-Hang Leong, Kangwei Xia +6
Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors for their long spin coherence time under ambient conditions. However, their spin resonances are relatively in…
Photonic Terahertz Phased Array
Li Niu, Xi Feng, Xueqian Zhang +11
Phased arrays are crucial in various technologies, such as radar and wireless communications, due to their ability to precisely control and steer electromagnetic waves. This precis…
II-Bench: An Image Implication Understanding Benchmark for Multimodal Large Language Models
Ziqiang Liu, Feiteng Fang, Xi Feng +23
The rapid advancements in the development of multimodal large language models (MLLMs) have consistently led to new breakthroughs on various benchmarks. In response, numerous challe…
RoboBrain 2.0 Technical Report
BAAI RoboBrain Team, Mingyu Cao, Huajie Tan +50
We introduce RoboBrain 2.0, our latest generation of embodied vision-language foundation models, designed to unify perception, reasoning, and planning for complex embodied tasks in…
CLHA: A Simple yet Effective Contrastive Learning Framework for Human Alignment
Feiteng Fang, Liang Zhu, Min Yang +6
Reinforcement learning from human feedback (RLHF) is a crucial technique in aligning large language models (LLMs) with human preferences, ensuring these LLMs behave in beneficial a…
Nanometer-precision non-local deformation reconstruction using nanodiamond orientation sensing
Kangwei Xia, Chu-Feng Liu, Weng-Hang Leong +5
Information of material deformation upon loading is critical to evaluate mechanical properties of materials in general, and key to understand fundamental mechano-stimuli induced re…
Measurement of single-cell elasticity by nanodiamond-sensing of non-local deformation
Yue Cui, Weng-Hang Leong, Chu-Feng Liu +5
Nano-indentation based on, e.g., atomic force microscopy (AFM), can measure single cell elasticity with high spatial resolution and sensitivity, but relating the data to cell mecha…
Can MLLMs Understand the Deep Implication Behind Chinese Images?
Chenhao Zhang, Xi Feng, Yuelin Bai +18
As the capabilities of Multimodal Large Language Models (MLLMs) continue to improve, the need for higher-order capability evaluation of MLLMs is increasing. However, there is a lac…