Jiafu Li

Investigation on seismic performance of beam-column joint with replaceable friction-yielding angle steel

Jinjie Men, Zhiyong Zhang, Qian Zhang, Yinggang Li et autres

Precise Xe 136 Double Beta Decay Measurement in PandaX-4T with Implications on the Nuclear Matrix Elements and Majorons

Zhe Yuan, Zihao Bo, W J Chen, Xun Chen et autres

The continuous spectrum of double beta decay (ββ) provides a sensitive probe to test the predictions of the standard model and to search for signatures of new physics beyond it. We present a comprehensive analysis of the ^{136}Xe ββ spectrum utilizing 39.1±0.7 …

cn, us (code pays fourni par la source)

Fatigue Performance and Life Prediction of Composite Bridge Decks under the Coupling Effect of Vehicle Loading and Low Temperature

Meigai Fu, Xiaowei Zhang, Tao Lan, Chao Dong et autres

Chromatic confocal microscopy: key technologies and advances in metrology applications

Fengshuang Liang, Dong Xiwen, Du Hua, Mingyang Wu et autres

Chromatic Confocal Measurement (CCM) has become a key technology in modern precision engineering due to its high resolution, measurement accuracy, fast response, and stability. In this presentation, I will introduce the application of CCM in metrology and the latest progress of our …

cn (code pays fourni par la source)

Probing scalar-neutrino and scalar-dark-matter interactions with PandaX-4T

PandaX Collaboration, T. Li, Zihao Bo, Wei Chen et autres

Scalar-mediated interactions may exist among neutrinos, dark matter particles, or between the two. Double $β$-decay experiments provide a powerful tool to probe such exotic interactions. Using $^{136}$Xe double $β$-decay data from PandaX-4T, we perform the first direct spectral search in the energy …

Tomographic beta-gamma spectroscopy of nuclear beta decay

PandaX Collaboration, Zhe Yuan, Zihao Bo, Wei Chen et autres

Nuclear $β$ decay, a sensitive probe of nuclear structure and weak interactions, has become a precision test bed for physics beyond the Standard Model, driven by recent advances in spectrometric techniques. Here we introduce tomographic $β$-$γ$ spectroscopy (TBGS) of nuclear $β$ decay, …

Path optimization of a flexible robot with a spatial compressed and a direction-guided exploring method

Yan Wang, Wensong Jiang, Zai Luo, Yang Li et autres

Optimal path planning of a measuring robot is a crucial component in automatic measurement. However, it is hard to obtain a stable optimal path solution when dealing with multiple environments. To overcome this problem, a spatial compressed and direction-guided exploring method is …

cn, us (code pays fourni par la source)

Reducing tilt errors in chromatic confocal measurement: a peak extraction algorithm based on the pseudo-Voigt function

Fengshuang Liang, Jiafu Li, Mingyang Wu, 杜 华 Du Hua et autres

In chromatic confocal measurement (CCM), peak extraction is a critical step in converting spectral signals into physical position information, which directly affects the measurement accuracy and reliability. However, when measuring inclined surfaces with CCM techniques, the spectral confocal signal (SCS) becomes distorted …

cn (code pays fourni par la source)

Investigation on vibration behavior of onshore wind turbine tower based on long-term monitoring data

Wanrun Li, Wenhai Zhao, Jiafu Li, Qingxin Zhu et autres

To study the structural characteristics of onshore wind turbines under a range of environmental and operational conditions, a 2.0 MW onshore wind turbine tower was monitored for a period of 3 years. Based on the long-term field monitoring data, a statistical analysis …

cn (code pays fourni par la source)

Anti-Interference Spectral Confocal Sensors Based on Line Spot

Bo Wang, Jiafu Li, Fengshuang Liang, Jiacheng Hu

Spectral confocal displacement sensors are non-contact optoelectronic sensors widely utilized for their high accuracy, speed, and ability to measure diverse surfaces. However, challenges including vibration, angular deflection, and surface quality variations can reduce sensor stability and accuracy when performing measurements such as …

cn (code pays fourni par la source)

Position reconstruction and surface background model for the PandaX-4T detector

Zhicheng Qian, Linhui Gu, Cheng Chen, Zihao Bo et autres

We report the position reconstruction methods and surface background model for the PandaX-4T dark matter direct search experiment. This work develops two position reconstruction algorithms: template matching (TM) method and photon acceptance function (PAF) method. Both methods determine the horizontal position of …

Searching for Neutrinoless Double-Beta Decay of $^{136}$Xe with PandaX-4T

PandaX Collaboration, Shu Zhang, Zihao Bo, Wei Chen et autres

We report the search for neutrinoless double-beta decay of $^{136}$Xe from the PandaX-4T experiment with a 3.7-tonne natural xenon target. The data reconstruction and the background modeling are optimized in the MeV energy region. A blind analysis is performed with data from …