Article
Thermodynamics
Hyukjoon Kwon, Monika Ivantysynova
Summary: The development of fuel-efficient vehicles has increased in response to consumer needs and environmental concerns. Hybrid vehicles, particularly hydraulic hybrids, have gained popularity as alternatives to traditional powertrains. This study focused on experimental and theoretical analysis of the energy characteristics of hydraulic hybrid systems, with a specific emphasis on thermal management.
Article
Engineering, Electrical & Electronic
Mingpan Bi, Haiwei Zhang, Yan Zhao, Lifang Xue, Pengbo Jiang, Yangbo Bai, Yinping Miao, Wei Shi, Jianquan Yao
Summary: An all-single-mode fiber intracavity displacement sensor based on U-shaped single-mode fiber interferometer is proposed and verified theoretically and experimentally. The sensitivity of the sensor can be optimized by adjusting the bending radius of the U-SMFI.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Yan Qing Wang, Wu Ce Xing, Jiaxing Wang, Qingdong Chai
Summary: The main purpose of this paper is to establish a general dynamic model of bolted joint multi-plate structures with flanges and investigate its vibration characteristics. The effects of flanges and contact pressure distribution are considered. The governing equations are derived based on the Kirchhoff plate theory and Euler-Bernoulli beam theory, and solved using the Rayleigh-Ritz method and Newmark-beta method. Experimental studies are conducted to verify the accuracy of the theoretical model. Results show that the present model is capable of predicting vibration accurately and can be extended to structures with different configurations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Optics
Keyin Li, Hui Zhao, Houjie Ma, Shi-Bo Dai, Si-Qi Zhu, Hao Yin, Zhen Li, Zhen-Qiang Chen
Summary: Theoretical and experimental studies were conducted on an intracavity frequency doubling red laser with BIBO walk-off compensation, showing that the compensation can significantly improve output power and intensity distribution.
Article
Chemistry, Multidisciplinary
Yunzhi Ling, Xiaozhao Li, Xiaosong Zhang, Zhan Liu, Peng Zhao
Summary: An experimental study was conducted to investigate the thermal performance of an oscillating heat pipe (OHP) for thermal management of electronic devices. The results showed that as the heat input increased, the average thermal resistance decreased and the stable evaporating and condensing temperatures increased. An empirical correlation was proposed to evaluate the thermal resistance of the OHP system based on the derived theoretical analysis.
APPLIED SCIENCES-BASEL
(2023)
Article
Plant Sciences
Chen Gong, Fujun Chen, Can Kang
Summary: An image processing method was used to measure droplet size distributions for different spray pressures and nozzle configurations in oil-based emulsion spray. The measured results validated a theoretical model based on the characteristics of spray sheets, which showed that oil-based emulsion spray forms a web structure constituted by perforations. The proposed theoretical model is based on nozzle exit size, spray sheet angle, and perforation number, and has a good consistency with the measured droplet size distribution.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Chemistry, Applied
Raffaele Cucciniello, Michele Tomasini, Anna Russo, Laura Falivene, Angelita Gambuti, Martino Forino
Summary: Acetaldehyde plays a crucial role in determining certain properties of wine, and its reaction with flavonoids can significantly impact the color, astringency, and colloidal stability of the wine. A study investigated the reaction between acetaldehyde and catechin, revealing the formation of ethylidene-bridged catechins as initial products, which eventually dissociate to accumulate vinyl-catechins over time.
Article
Engineering, Mechanical
Xiulong Chen, Xing Mu
Summary: This study investigates the impact of impact loads on the dynamic characteristics of multi-link press mechanisms with clearances. By establishing mathematical models and conducting experimental verification, it provides a basis for accurately predicting the dynamic characteristics of mechanisms with clearances considering impact loads.
NONLINEAR DYNAMICS
(2023)
Article
Mechanics
Zhouyang Cong, Xu Guo, Ting Si, Xisheng Luo
Summary: The study investigates the Richtmyer-Meshkov instability of a heavy fluid layer with reshock, highlighting the effects of initial layer thickness on interface evolution. A general one-dimensional theory is constructed to describe the interaction between unperturbed interfaces and waves under reshock conditions.
Article
Chemistry, Physical
M. Noumi, Y. Marouani, R. Dhahri, E. Dhahri, E. K. Hlil, B. F. O. Costa
Summary: The physico-chemical properties of lacunar perovskite based materials were analyzed, and it was found that creating vacancies can increase the magnetic entropy variation and refrigeration capacity of La0.8-x, square Na-x(0.2-x)square xMnO3 compounds, making them promising candidates for magnetic refrigeration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Mechanical
Meng Xie, Kai Wei, Juanjuan Ren, Ping Wang
Summary: This study compares and analyzes the factors affecting the natural frequency of the clip, establishes a finite element model to calculate the natural frequency, and verifies the accuracy of the calculations. The results indicate that the clamping force of the clip and the load-frequency-dependent stiffness of the elastic pad are two key parameters.
NONLINEAR DYNAMICS
(2023)
Article
Optics
Chao Han, Hongwei Chu, Tianli Feng, Shengzhi Zhao, Dechun Li, Jia Zhao, Weiping Huang
Summary: This paper synthesizes few-layered molybdenum ditelluride (MoTe2) nanosheets through liquid-phase exfoliation and measures their appearance, spectra, and saturated absorption characteristics. The MoTe2 is used as a saturable absorber (SA) to achieve a passively Q-switched YVO4/Nd:YVO4 laser with a maximum output power of 1.14 W and a minimum pulse duration of 66.2 ns. Moreover, a sub-nanosecond KTiOPO4 (KTP) based intracavity optical parametric oscillation (IOPO) is realized using a hybrid Q-switched laser with a MoTe2-SA and an acousto-optic modulator (AOM), resulting in a maximum output power of 195 mW and a minimum pulse duration of 835 ps for the signal wave.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Dongwu Li, Daniele Botto, Ruozhang Li, Chao Xu, Wenming Zhang
Summary: This paper presents experimental and theoretical modeling studies on the tangential contact stiffness and friction hysteresis of bolted joint interfaces under transversal vibration. A new test rig was developed to measure the interface fretting response of bolted joints. A multi-scale contact modeling method was proposed to calculate the tangential contact stiffness and reproduce the friction hysteresis of bolted joint interfaces. The effectiveness of the proposed method was verified by comparing the simulation results with the experimental counterparts in different cases of tangential loading.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Physical
Yangmin Wu, Wenjie Zhao, Zhibin Lu, Liping Wang
Summary: Fluorination treatment enhances the corrosion protection performance of graphene film, as evidenced by electrochemical impedance spectroscopy and corrosion morphologies. The fluorine atoms bonding with carbon elements inhibit the passage of corrosion-related molecules through the film, resulting in long-term anti-corrosion capability.
Article
Engineering, Marine
Chengfeng Li, Run Liu, Xiuyan Wang, Xintong Hao
Summary: This study investigates the hat-shaped buckling phenomenon of submarine pipelines through small-scale model tests and finite element analyses, proposing a new buckling mode and providing a reference for future experimental studies on pipeline buckling.
Article
Engineering, Electrical & Electronic
Shuai Li, Yanping Xu, Yuru Feng, Shuai Qu, Wenchen Yang, Zequn Wang, Zengguang Qin, Zhaojun Liu
Summary: The traditional phase-sensitive optical time-domain reflectometry (Phi-OTDR) has limitations in high-frequency vibration sensing and long-distance sensing. In this work, a novel method based on serial multi-coset sampling (MCS) strategy is proposed, which can recover sparse broadband vibration signals with sub-Nyquist sampling rates, breaking through the tradeoff between sensing range and measurable frequency bandwidth.
IEEE SENSORS JOURNAL
(2022)
Article
Instruments & Instrumentation
Bin Zhang, Xiaohan Chen, Xingyu Zhang, Zhaojun Liu, Ming Li, Jing Liu, Liwei Xu, Qiongyu Hu, Ping Li
Summary: This study demonstrated a passively mode-locked Yb-doped intra-cavity cascaded Raman fiber laser based on nonlinear polarization rotation, observing unusual evolutions of spectra and pulses for the first time. Successive first-order stimulated Raman scattering (SRS) laser and second-order cascaded SRS laser were obtained under different pump powers. Interaction of self-phase modulation, SRS, group velocity dispersion, and other nonlinear effects caused unique anomalous evolution in spectra and pulses of the Raman fiber laser.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Instruments & Instrumentation
Yuxi Pang, Yanping Xu, Xian Zhao, Zengguang Qin, Zhaojun Liu
Summary: This paper presents the experimental demonstration of a low-noise Brillouin random fiber laser (BRFL) with stabilized lasing output and narrow linewidth. The use of stimulated Brillouin scattering and Rayleigh scattering as the gain and feedback mechanisms, along with the introduction of a saturable absorption ring, results in a laser with improved stability and lower noise.
INFRARED PHYSICS & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yuxi Pang, Yanping Xu, Xian Zhao, Zengguang Qin, Zhaojun Liu
Summary: This study proposes and experimentally investigates a stabilized coherent narrow-linewidth Brillouin random fiber laser with low lasing noise. The laser utilizes stimulated Brillouin scattering and Rayleigh scattering in optical fibers to provide the gain and random distributed feedback. The stabilized lasing output with suppressed noise is achieved using a simple structure of a double-coupler fiber ring resonator. The proposed laser source shows significant improvement in multi-mode resonances, frequency jitters, and noise level compared to existing free-running Brillouin random fiber lasers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Runqiong Wang, Qinghua Song, Zhanqiang Liu, Haifeng Ma, Zhaojun Liu
Summary: This study proposes a multi-condition identification method based on sensor fusion to simultaneously identify chatter and tool wear by fusing multi-source heterogeneous data with different spatial time-frequency distributions. By extracting multi-sensor features and introducing a new signal feature, high accuracy identification of multiple conditions is achieved.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Physics, Multidisciplinary
Zhaojun Liu, Lian-Qing Zhu, Xian-Tong Zheng, Yuan Liu, Li-Dan Lu, Dong-Liang Zhang
Summary: In this study, the influence of InSb interface engineering on the crystal quality and optical properties of strain-balanced InAs/GaSb type-II superlattices has been systematically investigated. The results show that increasing the thickness of InSb interface leads to higher compressive strain and narrower bandgap in the superlattice. By optimizing the InSb interface, a high-quality crystal with well-defined surface and interface has been obtained.
Article
Materials Science, Multidisciplinary
Xibao Gao, Michel Cathelinaud, Xianghua Zhang, Hongli Ma, Zhaojun Liu
Summary: This article reports the fabrication of a one-dimensional photonic crystal microcavity using co-evaporation and its potential application in infrared fluorescence enhancement. The experimental results demonstrate a significant enhancement in emission intensity in this microcavity structure.
Article
Optics
Zecheng Wang, Shuzhen Fan, Xiaohan Chen, Xingyu Zhang, Zhenhua Cong, Zhaojun Liu, Zengguang Qin, Na Ming, Quanxin Guo, Liyuan Guo
Summary: This paper presents a modeling method for extracavity-pumped terahertz parametric oscillators (TPO) based on stimulated polariton scattering. The method is applied to an extracavity-pumped TPO based on MO:LiNbO3 crystal, and the simulation results are consistent with the experimental results. This research provides a foundation for studying this type of oscillator.
Review
Chemistry, Analytical
Shaonian Ma, Yanping Xu, Yuxi Pang, Xian Zhao, Yongfu Li, Zengguang Qin, Zhaojun Liu, Ping Lu, Xiaoyi Bao
Summary: This paper reviews the importance and advantages of fiber-optic high-temperature sensors in various industries. It also introduces the recent progress in transitioning from glass to crystal fiber sensing solutions and discusses the future prospects and challenges.
Article
Engineering, Electrical & Electronic
Guanguang Gao, Zhigang Zhao, Zhenhua Cong, Qikai Zhao, Zhaojun Liu
Summary: The study presents a comparison of six typical mode-locked fiber oscillators and suggests the all-fiber figure-9 oscillator as the best choice for high power ultrafast laser amplifiers, despite the need for higher pumping power.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2022)
Article
Automation & Control Systems
Yezhen Peng, Qinghua Song, Runqiong Wang, Zhanqiang Liu, Zhaojun Liu
Summary: This paper proposes a method for tool wear identification based on a single sensor signal. By using a hybrid model of deep convolutional neural network and stacked long short-term memory network, the limitations of less obtained information and poor anti-interference ability of single sensor are solved, achieving effective identification of tool wear.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Shaonian Ma, Yuxi Pang, Qiang Ji, Xian Zhao, Yongfu Li, Zengguang Qin, Zhaojun Liu, Yanping Xu
Summary: In this study, the temperature response of guided acoustic wave Brillouin scattering (GAWBS) spectra in silica single-mode fiber (SMF) was experimentally investigated up to 800 degrees C, demonstrating its feasibility for high-temperature monitoring. The resonance frequency of GAWBS spectra increases linearly with temperature, with temperature-dependent frequency shift coefficients of 8.19 kHz/degrees C and 16.74 kHz/degrees C for the two analyzed modes. Additionally, the linewidth of GAWBS spectra decreases linearly with temperature, with temperature-dependent rates of -6.91 x 10(-4)/degrees C and -8.56 x 10(-4)/degrees C for the two modes. The proposed sensing scheme exhibits improved performance and signal-to-noise ratio in high-temperature environments, making it suitable for sensing applications in extreme conditions.
Article
Environmental Sciences
Bohan Liu, Shaojie Men, Zhongjun Ding, Dewei Li, Zhigang Zhao, Jiahao He, Haochen Ju, Mengling Shen, Qiuyuan Yu, Zhaojun Liu
Summary: The paper presents an underwater hyperspectral imager that can detect and identify targets on the seafloor by collecting high-resolution spectral images. A novel integrated underwater hyperspectral imaging system was developed and an autofocus strategy based on liquid lens focusing transfer was proposed. The prototype showed accurate and stable performance in capturing hyperspectral data, with potential applications for in situ deep-sea exploration.
Article
Engineering, Electrical & Electronic
Jingchong Wang, Chen Guan, Yang Liu, Zhenhua Cong, Shiwu Wang, Yi Nie, Zhigang Zhao, Zhaojun Liu
Summary: In this study, a red laser diode-pumped Alexandrite laser with a semiconductor saturable absorber mirror for passive Q-switching was presented. By using customized SESAMs, a pulsed Alexandrite laser at 749.6 nm with an average power of 0.904 W, a repetition rate of 20.27 kHz, and a pulse energy of 44.59 μJ was achieved.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Yuxi Pang, Shaonian Ma, Xian Zhao, Zengguang Qin, Zhaojun Liu, Yanping Xu
Summary: A broadband high-sensitivity fiber-optic acoustic sensor based on Brillouin random fiber laser (BRFL) is proposed and demonstrated. The sensor utilizes a double coupler fiber ring resonator (DCFRR) in the BRFL as the sensing element, which filters out redundant random modes and ensures high-quality lasing output. The experimental results show that the sensor has a broadband frequency response and high sensitivity, making it suitable for detecting acoustic signals in both low-frequency and high-frequency regions with a high signal-to-noise ratio.
OPTICS AND LASER TECHNOLOGY
(2023)
