Yiwei Zhu

Guangdong Polytechnic Normal University

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Haibo Zhang

Huazhong University of Science and Technology

Bing Xie

Chongqing University

Weigang Ma

Tsinghua University

Mohsin Ali Marwat

Huazhong University of Science and Technology

Yao Xie

South China Normal University

Jian Xu

China Southern Power Grid (China)

Jin Jiang

First Hospital of Jilin University

Yangyang Zhang

Xi'an Jiaotong University

Xianzhi Yang

China Southern Power Grid (China)

Pengyuan Fan

Kunming University of Science and Technology

Cooperative Institutions

Huazhong University of Science and Technology

Chinese Academy of Sciences

Guangdong Polytechnic Normal University

Tianjin University

State Key Laboratory of Materials Processing and Die & Mould Technology

Shanghai Jiao Tong University

Tsinghua University

Zhejiang University

University of Sydney

Wuhan National Laboratory for Optoelectronics

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Deformation-induced phase transformation in 4H–SiC nanopillars

Acta Materialia (2014)

Bin Chen Jun Wang Yiwei Zhu Xiaozhou Liao Chunsheng Lu

Nanopillar

10.1016/j.actamat.2014.07.055

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Citations (17)

Large electric-field-induced strain in B-site complex-ion (Fe0.5Nb0.5)4+-doped Bi1/2 (Na0.82K0.12)1/2TiO3 lead-free piezoceramics

Ceramics International (2017)

Pengyuan Fan Yangyang Zhang Bing Xie Yiwei Zhu Weigang Ma

Hysteresis

10.1016/j.ceramint.2017.11.092

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Citations (48)

Self-assembly and phase behavior of mixed patchy colloids with any bonding site geometry: theory and simulation

Soft Matter (2020)

Yiwei Zhu Artee Bansal Shun Xi Jinxin Lu Walter G. Chapman

Patchy colloids and associating fluids have attracted continued interest due to the interesting phase behavior and self-assembly in solution. The ability to fabricate patchy colloids with multiple attractive surface patches of different number, size, shape, and relative location makes patchy colloids a good candidate as building blocks to form complex advanced materials. However, a theory that clearly relates the self-assembled structures that form based on the anisotropic interactions has been missing. Although Wertheim's theory in the form of the SAFT model is widely used to predict self-assembly and phase behavior in solution, SAFT does not include multibody correlations necessary to model any shape of association site or sites that can form multiple bonds. We have recently developed a new theory for associating colloids that naturally incorporates multibody correlations based on a cluster distribution approach due to Bansal, Asthagiri, Marshall, and Chapman (BAMC). In this paper, we extended the cluster distribution theory to predict the thermodynamic properties and phase behavior of binary systems consisting of anisotropic particles with any geometry of bonding site. In particular, we consider self-assembly of Janus particles, Saturn particles, and ternary particles mixed with solvent colloids that have two directional patchy sites. Good agreement between theoretical predictions and molecular simulation is shown for self-assembly, thermodynamic properties in this system. Re-entrant phase behavior has been investigated and low density gels is predicted.

10.1039/d0sm00248h

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Citations (7)

Large strain with low hysteresis in Bi4Ti3O12 modified Bi1/2(Na0.82K0.18)1/2TiO3 lead-free piezoceramics

Journal of the European Ceramic Society (2018)

Pengyuan Fan Yangyang Zhang Qi Zhang Bing Xie Yiwei Zhu

Hysteresis

10.1016/j.jeurceramsoc.2018.05.028

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Citations (63)

Information Modeling of Communication in Digital Grid system Based on BIM Technology

Xianzhi Yang Jian Xu Yao Xie Jin Jiang Yiwei Zhu

In order to promote the construction of communication system in the digital grid and the sharing of information of the whole life cycle of the communication system in the digital grid, the basic framework of the information model of the communication system in digital gridwork is designed and constructed based on the full consideration of the objects and information composition at each stage. The basic components of the information model are defined, and the information model is elaborated in terms of geometry and properties based on the Industry Foundation Class (IFC) standard. In this study, the communication unit is taken as the instantiated object of the information model, the characteristics of the job structure and the expression of the spatial structure in the communication field are combined. The relationship between the whole system and the components of the communication engineering unit is established. By extending the classical Building Information Model (BIM), the information model of the communication system in digital grid based on IFC standard is constructed, which provides a reference for the promotion of BIM technology in the field of digital grid.

Information model

Building Information Modeling

Information Sharing

10.1145/3507971.3508004

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Citations (0)

Large strain under low driving field in lead‐free relaxor/ferroelectric composite ceramics

Journal of the American Ceramic Society (2018)

Pengyuan Fan Yangyang Zhang Yiwei Zhu Weigang Ma Kai Liu

Abstract 0.75(Na 0.5 Bi 0.5 )TiO 3 –0.25SrTiO 3 lead‐free incipient piezoceramic is a promising candidate for actuator applications due to their large reversible electromechanical strains at the relatively low driving field of 40 kV/cm. In order to further reduce the driving field of 0.75(Na 0.5 Bi 0.5 )TiO–0.25SrTiO 3 relaxor ceramic to meet the requirements for real actuators application, the relaxor/ferroelectric ( RE / FE ) 0‐3 composite ceramics method was employed. The polarization and strain behaviors were examined as a function of the weight ratio of the relaxor/ferroelectric phases. It was found that 90 wt% 0.75(Na 0.5 Bi 0.5 )TiO 3 –0.25SrTiO 3 /10 wt% 0.96(Na 0.84 K 0.16 ) 1/2 Bi 1/2 TiO 3 –0.04SrTiO 3 RE / FE 0‐3 type composite samples provided a high unipolar strain of 0.25% and the corresponding large‐signal piezoelectric coefficient, d * 33 of 833 pm/V at 30 kV/cm, which are 32% higher than the values of the pure 0.75(Na 0.5 Bi 0.5 )TiO 3 –0.25SrTiO 3 . The enhanced electric‐field‐induced strain at relatively lower field was attributed primarily to the reduction in the RE ‐ FE phase transition electric field. It was also found that the RE / FE composite ceramics exhibited significantly reduced frequency dependence in the unipolar strain behavior at room temperature.

Relaxor ferroelectric

Strain (injury)

10.1111/jace.16256

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Citations (49)

A Cooperative Computation Offloading Scheme for Dense Wireless Sensor-assisted Smart Grid Networks

2019 IEEE 4th International Conference on Computer and Communication Systems (ICCCS) (2021)

Jin Jiang Jian Xu Yao Xie Yiwei Zhu Zhongbin Li

The emerging applications in wireless sensor-based smart grid networks has provided higher demands on latency, and such latency-sensitive applications also require dense computations, especially in dense wireless sensor networks. To further satisfy the huge demands on communication and computation resources, mobile edge computing (MEC) has been proposed to offload computation tasks from terminals to nearby MEC servers that are deployed on wireless sensors. However, in the practical scenario, due to the expensive cost of deploying MEC servers, the amount of the deployed MEC servers is always limited, i.e., it may be much lower than that of sensors or terminals. As a result, the computation offloading in MEC-assisted dense wireless sensor network still faces open challenges. To address the above issue, we propose a joint MEC and device-to-device(D2D)-based computation offloading scheme. Specifically, we formulate the computation offloading problem as a joint access selection and resource allocation optimization, which minimizes the energy consumption while requested bandwidths and delay are satisfied. Then, we solve the formulated problem by designing a quantum behaved particle swarm optimization (QPSO) algorithm. The simulation results demonstrate that the proposed scheme can improve the efficiency of computation offloading and decrease the energy consumption in the MEC-assisted dense wireless sensor-based smart grid networks.

Computation offloading

Mobile Edge Computing

10.1109/icccs52626.2021.9449185

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Citations (7)

Effect of Thermal Annealing on Nanostructure and Shape Transition in SiC–C Nanocomposites

Nanoscience and Nanotechnology Letters (2012)

Yiwei Zhu Zhifeng Zhou Chunsheng Lu Xiaozhou Liao Y.G. Shen

10.1166/nnl.2012.1329

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Citations (1)

Low-temperature sintered (Na1/2Bi1/2)TiO3-based incipient piezoceramics for co-fired multilayer actuator application

Journal of Materiomics (2019)

Pengyuan Fan Yangyang Zhang Shan‐Tao Zhang Bing Xie Yiwei Zhu

Low-temperature sintered (Na1/2Bi1/2)0.935Ba0.065Ti0.975(Fe1/2Nb1/2)0.025O3 (NBT-BT-0.025FN) lead-free incipient piezoceramics were investigated using high-purity Li2CO3 as sintering aids. With the ≤0.5 wt% Li2CO3 addition, the introduced Li+ cations precede to enter the A-sites of the perovskite lattice to compensate for the A-site deficiencies. Once the addition exceeds 0.5 wt%, the excess Li+ cations will occupy B-sites and give rise to the generation of oxygen vacancies, which accelerate the mass transport and thus lower the sintering temperature effectively from 1100 °C down to 925 °C. It was also found that a small amount of Li+ addition has little effect on the phase structure and electromechanical properties of the system, but overweight seriously disturbs these characteristics because of the large lattice distortion. The sintered NBT-BT-0.025FN incipient piezoceramics with 1.25 wt% Li2CO3 addition at 925 °C provides a large strain of 0.33% and a corresponding large signal piezoelectric coefficient d*33 of 550 pm/V at 60 kV/cm, indicating this system is a very promising candidate for lead-free co-fired multilayer actuator application.

10.1016/j.jmat.2019.01.004

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Citations (27)

Characterization and experimental investigation of silicon nitride-based composite phase change materials for battery thermal management

Applied Thermal Engineering (2024)

Zemin Li Liu Jian Junjie Yu Kun Shan Yiwei Zhu

Characterization

Phase-change material

10.1016/j.applthermaleng.2024.123374

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Citations (1)