Junjie Wang

Chang'an University

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Liubiao Chen

University of Chinese Academy of Sciences

Yuan Zhou

Fuzhou University

Kaixuan Gu

Technical Institute of Physics and Chemistry

Zhaozhao Gao

Technical Institute of Physics and Chemistry

Changzhao Pan

Southern University of Science and Technology

Xiaotong Xi

Pompeu Fabra University

Zeju Weng

Technical Institute of Physics and Chemistry

Wei Ji

Qinghai Normal University

Xiaoyu Fan

University of Chinese Academy of Sciences

Luna Guo

Tianjin University of Commerce

Cooperative Institutions

Chinese Academy of Sciences

199

University of Chinese Academy of Sciences

122

Technical Institute of Physics and Chemistry

Tsinghua University

Nanjing University of Science and Technology

University of Science and Technology Beijing

Zhejiang University

Nanjing University of Aeronautics and Astronautics

Shanghai Jiao Tong University

University of Science and Technology of China

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Experimental analysis of packed bed cold energy storage in the liquid air energy storage system

Journal of Energy Storage (2024)

Luna Guo Wei Ji Xiaoyu Fan Liubiao Chen Junjie Wang

Liquid air

Exergy efficiency

Energy Recovery

10.1016/j.est.2023.110282

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Citations (10)

In-situ observation of martensitic transformation in Cu-Al-Mn cryogenic shape memory alloy

Fusion Engineering and Design (2017)

Yu Lei Xing Qin Farong Wan Pingping Liu Liubiao Chen

Diffusionless transformation

10.1016/j.fusengdes.2017.05.083

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Citations (9)

Possible Habitats for NH₃, NH₂D, H¹³CN, HC¹⁵N, SO, and C¹⁸O in the Initial Conditions of High-mass Star Formation

Research in Astronomy and Astrophysics (2024)

Quan-Ling Cui Chuan-Peng Zhang Junjie Wang

Abstract The initial condition of high-mass star formation is a complex area of study because of the high densities ( n H 2 > 10 6 cm −3 ) and low temperatures ( T dust < 18 K) involved. Under such conditions, many molecules become depleted from the gas phase by freezing out onto dust grains. However, the N-bearing and deuterated species could remain gaseous under these extreme conditions, suggesting that they may serve as ideal tracers. In this paper, using the Plateau de Bure Interferometer and Very Large Array observations at 1.3 mm, 3.5 mm, and 1.3 cm, we investigate the possible habitats for NH 3 , NH 2 D, H 13 CN, HC 15 N, SO, and C 18 O in eight massive precluster and protocluster clumps G18.17, G18.21, G23.97N, G23.98, G23.44, G23.97S, G25.38, and G25.71. We found that the NH 3 cores are in good agreement with the 3.5 mm peak emission, but the NH 3 is much more extended than the 3.5 mm emission structure. The SO distributions agree well with the 3.5 mm peaks for the evolved star formation stage, but we did not detect any SO emission in the four earliest star formation sources. C 18 O is a poor tracer in conditions of the cold (≲18 K) and dense (≳10 4 cm −3 ) cores, e.g., the prestellar cores. We also found that the NH 2 D cores are mainly located in the temperature range of 13.0–20.0 K, and the NH 2 D lines may be strongly depleted above 20 K.

10.1088/1674-4527/ad386d

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Research on dynamic perfusion control technology of 3D printed tissue vascular network

Journal of Physics Conference Series (2023)

Junjie Wang Liming Zhang Song Li

Abstract In order to solve the problem that the medium cannot be supplied accurately during the perfusion culture of the vascular network in large-volume 3D printing tissue, a perfusion control technology was studied by designing and building an in vitro perfusion and monitoring platform with feedback regulation. First, a large-volume vascular network of hydrogel material was fabricated by 3D bioprinting technology as the experimental object of perfusion. Then we designed and built the dynamic perfusion device and the monitoring equipment in the perfusion process independently and applied the real-time flow calibration control technology on this basis. Finally, the accuracy of the flow real-time calibration control technology was verified through the perfusion experiment of the large-volume vascular network. The results showed that the error rate between the actual flow rate and the preset flow rate increased gradually with the decrease of the preset flow rate of medium perfusion. When the preset flow is 3 mL/min, the error rate between them is as high as 19.33% without the application of flow calibration control technology. The dynamic perfusion device can reduce the average error rate between the two from 8.1% to 0.4% after applying real-time flow calibration control technology, which proves that the device can cultivate a large-volume vascular network with high-precision perfusion after the application of real-time flow calibration control technology.

Vascular network

10.1088/1742-6596/2492/1/012021

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Evolution of Electromagnetic Fields and Forced Flow in a Metal Melt under the Impact of Hot‐Top Pulsed Magneto‐Oscillation

steel research international (2024)

Yulan Zhou Gang Chen Yunhu Zhang Junjie Wang Yanyi Xu

Hot‐top pulsed magneto‐oscillation (HPMO) is developed as a novel approach to achieve grain refinement and solute homogenization in heavy steel ingots. Through a combination of numerical simulations and melt flow measurements, this study investigates the evolution of electromagnetic fields and forced flow within alloy melts under the influence of HPMO, with a focus on varying electromagnetic parameters such as electric current intensity, frequency, and pulse length. The results of the simulations reveal the formation of double‐circulating flows in opposite directions within the melt. Experimental measurements of the flow field distribution closely align with the simulation outcomes. Furthermore, it is observed that the induced magnetic field inside the melt changes direction once, and the electromagnetic force changes direction three times within a single pulse length period under the influence of HPMO. Notably, the radial electromagnetic force, directed toward the interior of the melt, surpasses the normal electromagnetic force away from the melt. This phenomenon leads to a stable flow of the melt, contributing to grain refinement. The findings presented in this study offer valuable insights into the use of HPMO as a promising technique for improving the quality of heavy steel ingots.

Oscillation (cell signaling)

Magneto

Melt flow index

10.1002/srin.202400008

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Design of The Stratospheric Airship Ground Safety Control Test and Analysis System Based on Adaptive Safety Control Decision Technology

2019 IEEE 2nd International Conference on Automation, Electronics and Electrical Engineering (AUTEEE) (2019)

Xiaoyue Xing Junjie Wang Meng Xiaojun Peng Yin Jin Zhang

It is exploratory and unpredictable for the stratospheric airship test, and the reliability of the airship's safety control system affects the success of the test directly. On the basis of analyzing the working pattern of the safety control system and summing up the deficiencies of the ground tests, this paper designs the stratospheric airship ground safety control test and analysis system based on adaptive safety control decision technology. This system would improve the efficiency of ground tests observably and verify the feasibility of the safety control strategy, meanwhile it would provide auxiliary support for the on-spot safety control decision in each stage of airship flight test and data support for future research reliably.

System safety

10.1109/auteee48671.2019.9033276

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Citations (2)

Study on the Structure of Flying Plate Detonator

Huogongpin (2016)

Junjie Wang Huang Yin-sheng LI Jin-tao Cao Shifa GE Meng-zhu

Detonator

Source

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Kinematics and chemistry of the hot core in G20.08–0.14N

Monthly Notices of the Royal Astronomical Society (2013)

Jin-Long Xu Junjie Wang

We present Submillimeter Array observations of the massive star-forming region G20.08-0.14N at 335 and 345 GHz. With the SMA data, 41 molecular transitions were detected related to 11 molecular species and their isotopologues, including SO2, SO, C34S, NS, C17O, SiO, CH3OH, HC3N, H13CO+, HCOOCH3 and NH2CHO. In G20.08-0.14N, 10 transition lines of the detected 41 transition lines belong to SO2, which dominates the appearance of the submillimeter-wave spectrum. To obtain the spatial kinematic distribution of molecules in G20.08-0.14N, we chose the strongest and unblended lines for the channel maps. The channel maps of C34S an SiO, together with their position-velocity diagrams, present that there are two accretion flows in G20.08-0.14N. Additionally, SiO emission shows a collimated outflow at the NE-SW direction. The direction of the outflow is for the first time revealed. The rotational temperature and the column density of CH3OH are 105 K and 3.1*10^{17} cm^{-2}, respectively. Our results confirm that a hot core is associated with G20.08-0.14N. The hot core is heated by a protostar radiation at it center, not by the external excitation from shocks. The images of the spatial distribution of different species have shown that the different molecules are located at the different positions of the hot core. Through comparing the spatial distributions and abundances of the molecules, we discuss possible chemical processes for producing the complex sulfur-bearing, nitrogen-bearing and oxygen-bearing molecules in G20.08-0.14N.

Protostar

Submillimeter Array

Outflow

Isotopologue

Excitation temperature

Mean kinetic temperature

10.1093/mnras/stt331

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Citations (8)

Effect of melt overheating treatment on the microstructure and mechanical properties of Zn–Al alloy

Vacuum (2022)

Xianke Lu Shengjie Xiao Wenquan He Junjie Wang Yiming Ma

Overheating (electricity)

Equiaxed crystals

Elongation

Brittleness

Brittle fracture

10.1016/j.vacuum.2022.111071

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Citations (4)

Application of process mineralogy automatic detection system in the study of a refractory gold ore

Qiang Ji Guangsheng Li Xingfu Zhu Tengyue Gao Guangli Qin

Mineralogy automatic determination system combines mineral processing technology with computer technology, and is automatically runs through API, which not only enables the determination of mineral composition and dissociation degree, but also greatly improves the accuracy of detection. Through the system of a complex gold ore process mineralogy analysis, accurately determine the minerals in the sample, dissociation characteristics and occurrence status index, and determine the beneficiation process and the experimental study, has obtained the ideal effect, mineralogy automatic determination system has played an important role in the study.

Beneficiation

Mineral processing

Gold ore

10.1117/12.2674022

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