Explanipedia

Numerical Simulation and Experimental Study of the Extrusion Process in 3D Printing for High-Viscosity and High-Solid-Content Multicomponent Energetic Materials Open

Dashun Zhang, Shijun Ji, Ji Zhao, Juan Du, Handa Dai , et al. · 2025

A combined approach of numerical simulation and experimental validation was employed to investigate the phenomena of screw adhesion and nozzle clogging, which occur frequently during the material conveying and extrusion process of high-vis…

Optically transparent conformal ultra-broadband metamaterial absorber based on ITO conductive film Open

Shijun Ji, Hailin Ren, Chenguang Zhang, Ji Zhao, Han Wu , et al. · 2023

An optically transparent metamaterial absorber with polarization insensitivity and wide-angle absorption is proposed. The absorber, which consists of an indium tin oxide resistive film and a low-loss substrate, is optically transparent and…

Graphene metasurface for broadband absorption and terahertz sensing Open

Hailin Ren, Shijun Ji, Ji Zhao, Handa Dai · 2023

Materials science Physics Chemistry

A plasmon-induced terahertz metamaterial absorber is proposed. The bottom ground layer uses gold to block the transmission of terahertz incident waves, and the pattern layer and the ground layer are separated by topas. The 90% absorption b…

Deformation Analysis of the Multiplanar Conformal Off-Axis Four-Mirror in an Aerospace Environment Open

Haodong Huo, Shijun Ji, Ji Zhao, Rengquan Sun, Handa Dai · 2021

Physics Mathematics

The effect of maneuver overload on a new type of the multiplanar conformal off-axis four-mirror is studied under the noninertial environment of aerospace. Two kinds of maneuvering flight, horizontal maneuvering and vertical maneuvering, ar…

Ultra-Precision Single-Point Diamond Turning of a Complex Sinusoidal Mesh Surface Using Machining Accuracy Active Control Open

Peixing Ning, Ji Zhao, Shijun Ji, Jingjin Li, Handa Dai · 2021

Computer science Materials science Engineering

Single-point diamond turning (SPDT) assisted with slow tool servo (STS) is the most commonly utilized technique in the fabrication of optical modules. However, the tool path significantly affects the quality of the machined surface. In ord…

Design and Analysis of a Triple-band Non-zonal Polarization Electromagnetic Metamaterial Absorber Open

Han Wu, Shijun Ji, Ji Zhao, Zhiyou Luo, Handa Dai · 2021

Materials science Physics Chemistry

A facile design of a novel triple-band electromagnetic metamaterial absorber (MMA) with polarization insensitive property is proposed in this paper. Each unit of the MMA consists of upper copper resonator and bottom copper plate with middl…

Theoretical Modeling and Machining Experiments of Cylindrical Microstructure Assisted by Single Point Diamond Turning Open

Jingjin Li, Shijun Ji, Ji Zhao, Jian‐Feng Li, Handa Dai · 2021

Materials science Engineering Physics

Micro structure requires nanometer-scale surface roughness and micro- or even sub-micron form error accuracy in different applications. Two kinds of modeling theories and methods of micro-feature of rotating body and non-rotating body are …

Influence of machining parameters on micro-motion platform displacement during grinding Al-Mg alloys workpiece assisted by two-dimensional low-frequency vibration Open

Shiyang Yu, Shijun Ji, Ji Zhao, Chao Zhang, Handa Dai · 2021

Materials science Engineering Computer science

The main factors affecting the displacement of micro-motion platform during the grinding process are spindle speed, cutting force, and piezoelectric ceramic input voltage model. This article, using the orthogonal test method, found a set o…

Machining precision controlling method for plane surface assisted by SPDT Open

Jingjin Li, Shijun Ji, Ji Zhao, Fei Yuan, Handa Dai · 2021

Computer science Materials science Engineering

In traditional processing mode, a given lathe and a set of fixed processing system can only produce a predetermined precision part. This article proposes a machining method that can control the surface precision of machining plane parts, a…

Design and Analysis of a Five-Band Polarization-Insensitive Metamaterial Absorber Open

Han Wu, Shijun Ji, Ji Zhao, Chengxin Jiang, Handa Dai · 2020

Materials science Physics Chemistry

A five-band metamaterial absorber (MMA) is presented. The proposed absorber consists of a three-layer structure of the top metal resonator, intermediate dielectric layer, and bottom metal plane. The top structure takes the centroid as the …

Research on tool path generation for integrated off-axis four-mirror group in single point diamond turning Open

Peixing Ning, Ji Zhao, Shijun Ji, Jingjin Li, Handa Dai · 2020

Computer science Engineering Mathematics

Multi-free-surface mirror integrated system is the development trend of optical system, but its ultra-precision machining is very difficult, this paper mainly studies the tool path generation problem of multi-free-surface reflector integra…

An Ultra‐Broadband Metamaterial Absorber with High Absorption Rate Throughout the X‐Band (Phys. Status Solidi B 11/2019) Open

Shijun Ji, Chengxin Jiang, Ji Zhao, Jili Wang, Handa Dai · 2019

Materials science Physics Chemistry

In article no. 1900069 by Shijun Ji et al., a polarizationinsensitive ultra-broadband metamaterial absorber (UMMA) is proposed. The UMMA's unit cell consists of a metal film and a multilayer-crosscone structure separated by a dielectric la…

Ultra-Precision Machining of a Compound Sinusoidal Grid Surface Based on Slow Tool Servo Open

Shijun Ji, Jianfeng Li, Ji Zhao, Mei Feng, Changrui Sun , et al. · 2018

Materials science Computer science Engineering

Compound sinusoidal grid surface with nanometric finish plays a significant role in modern systems and precision calibrator, which can make the systems smaller, the system structure more simple, reduce the cost, and promote the performance…

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