Search results for: Jianxun Zhang

Items from 1 to 20 out of 117 results

article

Remaining useful life prediction method for rolling bearings based on hybrid dilated convolution transfer

Bo Zhang, Changhua Hu, Hao Zhang, Jianfei Zheng, more

Quality and Reliability Engineering International > 40 > 6 > 3018 - 3036

It is difficult to effectively predict remaining useful life (RUL) due to limited training samples and lack of life labels in some operating conditions of practical engineering. When existing deep learning methods predict the RUL of equipment in such operating conditions using a model trained on other operating conditions, the poor generalization of the model caused by large distribution differences...

article

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Lina Ren, Dayuan Wang, Liang Qi, Mengyuan Ye, more

Materials and Corrosion > 75 > 8 > 1061 - 1072

This work aims to analyze the passivation and pitting corrosion behaviors of laser beam welded R60702 zirconium alloy in neutral and acidic chloride‐containing electrolytes. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements are carried out to investigate the electrochemical performance of the welding joint. Scanning electron microscope, X‐ray diffraction, and three‐dimensional...

article

Highly Flexible, High‐Performance, and Stretchable Piezoelectric Sensor Based on a Hierarchical Droplet‐Shaped Ceramics with Enhanced Damage Tolerance

Qianqian Xu, Yong Tao, Zhenxing Wang, Hanmin Zeng, more

Advanced Materials > 36 > 18 > n/a - n/a

Stretchable self‐powered sensors are of significant interest in next‐generation wearable electronics. However, current strategies for creating stretchable piezoelectric sensors based on piezoelectric polymers or 0–3 piezoelectric composites face several challenges such as low piezoelectric activity, low sensitivity, and poor durability. In this paper, a biomimetic soft‐rigid hybrid strategy is used...

article

Construction of Flexible Piezoceramic Array with Ultrahigh Piezoelectricity via a Hierarchical Design Strategy

Qianqian Xu, Zhenxing Wang, Junwen Zhong, Minyang Yan, more

Advanced Functional Materials > 33 > 41 > n/a - n/a

The µW‐level power density of flexible piezoelectric energy harvesters (FPEHs) restricts their potential in applications related to high‐power multifunctional wearable devices. To overcome this challenge, a hierarchical design strategy is proposed by forming porous piezoceramics with an optimum microstructure into an ordered macroscopic array structure to enable the construction of high performance...

article

Theoretical kinetics investigations of the reaction HO + SO ↔ H + SO₂ on an accurate full‐dimensional potential energy surface

Xiaoshan Huang, Jie Qin, Jianxun Zhang, Jun Li

International Journal of Chemical Kinetics > 55 > 8 > 415 - 430

The reaction HO + SO → H + SO₂ (R_t) and its reverse (R_‐t) play an important role in environment and the combustion of sulfur‐containing fuels. However, their kinetics is of high uncertainty as its reaction profile is complicated with multiple deep complexes and channels. In this work, the kinetics and mechanisms of R_t and R_‐t are studied comprehensively based on a newly developed full‐dimensional...

article

Surgical Tool Handle Vibration‐Based Drilling State Recognition During Hip Fracture Fixation

Guangming Xia, Wei Liu, He Bai, Yuan Xue, more

Orthopaedic Surgery > 14 > 11 > 2964 - 2978

Objectives Traditional manual drilling during hip fracture fixation can easily lead to unstable fixation and vascular damage. This study aimed to investigate a safe and easy‐to‐use robot‐assisted method to automatically drill bone and distinguish critical bone drilling states with high accuracy in real‐time for the bone hole‐making process during hip fracture fixation. Methods A bone‐drilling robotic...

article

Degradable Hemostatic Antibacterial Zein Nanofibrous Mats as Anti‐Adhesive Wound Dressing

Yang Wang, Rong Li, Ying Liu, Yingxiang Huang, more

Macromolecular Materials and Engineering > 307 > 10 > n/a - n/a

Strong blood adhesion to dressing may cause secondary damage to the wounds during the wound dressing replacement process. Thus, blood repellent dressings have significant potential applications in wound treatment. Herein, a hydrophobic, degradable, and antibacterial dressing is reported to reduce the blood adhesion and prevent infection around the wounds. The dressing is prepared by cross‐linked non‐woven...

article

Dynamic In‐Plane Compression of Asymmetric Metal Corrugated Sandwich Columns

Jianxun Zhang, Hui Yuan, Qinghua Qin, Yang Ye, more

Advanced Engineering Materials > 22 > 3 > n/a - n/a

Dynamic in‐plane compression of asymmetric metal corrugated sandwich columns is conducted analytically and numerically. The initial collapse modes of the asymmetric sandwich columns are observed and identified, i.e., elastic face wrinkling, plastic face wrinkling, macro plastic buckling, and macro elastic buckling. The collapse mechanism maps are conducted for asymmetric metal corrugated sandwich...

article

Tissue discrimination by bioelectrical impedance during PLL resection in anterior decompression surgery for treatment of cervical spondylotic myelopathy

Fuqiang Shao, He Bai, Muyao Tang, Yuan Xue, more

Journal of Orthopaedic Surgery and Research > 2019 > 14 > 1 > 1-8

Background The electrical properties of biological tissues differ depending on their physical properties. This study aimed to explore if bioelectrical impedance (modulus and phase) would discriminate tissues relevant to resection of the posterior longitudinal ligament (PLL) in anterior cervical decompression surgery. Methods PLL resection via an anterior approach was performed on the C4/5 segments...

article

Direct analysis of volatile components from intact jujube by carbon fiber ionization mass spectrometry

Shihao Sun, Yihan Zhang, Peng Li, Hui Xi, more

BMC Chemistry > 2019 > 13 > 1 > 1-9

In situ analysis of odor is an important approach to connect odor with chemical composition. However, it is difficult to conduct a rapid direct analysis of the odor sample because of low analyte concentration and sampling. To achieve the direct analysis, a carbon fiber ionization mass spectrometry (CFI-MS) method has been developed and applied to measure volatile components releasing from intact jujube...

article

Dynamic collapse of metal self-similar hierarchical corrugated sandwich plates

Jianxun Zhang, Yang Ye, Yuan Zhu, Qinghua Qin, more

Acta Mechanica > 2019 > 230 > 5 > 1549-1563

The dynamic collapse response of metal self-similar hierarchical corrugated sandwich plates is analyzed. The analytical model is derived for the reaction forces of the top and bottom face sheets. Finite element analysis is conducted to investigate the dynamic collapse of the self-similar hierarchical corrugated sandwich cores. Collapse modes of cores are found compressed at different impact velocities...

article

High-Temperature Low-Cycle Fatigue Behavior of HS80H Ferritic–Martensitic Steel Under Dynamic Strain Aging

Wenlan Wei, Yaorong Feng, Lihong Han, Jianxun Zhang, more

Journal of Materials Engineering and Performance > 2018 > 27 > 12 > 6629-6635

In this work, low-cycle fatigue tests were performed on HS80H ferritic–martensitic steel with the strain amplitudes ranging from 0.5 to 2.0% at room temperature and 350 °C. The cyclic stress response at 350 °C was found to be different from that at room temperature due to the effect of dynamic strain aging and showed a significant secondary hardening when the strain values were 0.5 and 0.7%. Furthermore,...

article

Crushing and energy absorption of density-graded foam-filled square columns: Experimental and theoretical investigations

Xuehui Yu, Qinghua Qin, Jianxun Zhang, Siyuan He, more

Composite Structures > 2018 > 201 > C > 423-433

The static axial crushing and energy absorption of density-graded aluminum foam-filled square metal columns are experimentally and theoretically investigated. Typical deformation modes are observed in experiments, such as symmetric, asymmetric, extension and rupture modes. Theoretical analysis is carried out and the predictions are in good agreement with the experimental results. The effects of gradient...

article

Cyclic hardening and dynamic strain aging during low-cycle fatigue of Cr-Mo tempered martensitic steel at elevated temperatures

Wenlan Wei, Yaorong Feng, Lihong Han, Qunbing Zhang, more

Materials Science and Engineering: A > 2018 > 734 > C > 20-26

Dynamic strain aging (DSA) has a noticeable impact on low cycle fatigue behavior of Cr-Mo tempered martensitic steel at elevated temperatures. At 350 °C, the stress response presented evidently secondary hardening phenomenon, and the fatigue life is significantly higher than room temperature which is contrary to the usual understanding. The analysis shows that the reason for the secondary hardening...

article

Large deflections of multilayer sandwich beams with metal foam cores under transverse loading

Jianxun Zhang, Yang Ye, Qinghua Qin

Acta Mechanica > 2018 > 229 > 9 > 3585-3599

In this paper, large deflections of fully clamped multilayer sandwich beams with metal foam cores are investigated. Based on the yield criteria, analytical solutions are derived for the plastic behavior of fully clamped multilayer sandwich beams loaded by a punch, in which the effects of local denting and core strength on the overall bending are considered. The finite element method is employed to...

article

Three-dimensional finite element analysis of residual stresses in circumferential welds of 2205/X65 bimetallic pipe

Zhiqiang Dong, Jianxun Zhang

The International Journal of Advanced Manufacturing Technology > 2018 > 96 > 5-8 > 2841-2851

Corrosion has a great negative influence on the pipe service life, and high welding residual stress will accelerate corrosion and reduce the strength of the pipe. Traditional carbon pipe is highly susceptible to corrosion, especially in the oil transport industry, and the stainless steel pipe is expensive. So bimetallic steel is a good choice for high-pressure and corrosion-resistant pipe. Multi-pass...

article

Dynamic response of square sandwich plates with a metal foam core subjected to low-velocity impact

Qinghua Qin, Xiaoyu Zheng, Jianxun Zhang, Chao Yuan, more

International Journal of Impact Engineering > 2018 > 111 > C > 222-235

An analytical model is developed to predict the dynamic response of fully clamped square sandwich plate with metal foam core struck transversely by a heavy mass with low-velocity. Large deflection effect is incorporated in analysis by considering the interaction between the plastic bending and stretching. The analytical expressions are obtained for the structural deflection, the structural response...

article

On low-velocity impact response of metal foam core sandwich beam: A dual beam model

Qinghua Qin, Chunping Xiang, Jianxun Zhang, Mingshi Wang, more

Composite Structures > 2017 > 176 > C > 1039-1049

A theoretical procedure for dynamic response of metal foam core sandwich beams struck by a heavy mass with low-velocity is developed to consider the combined local denting and global deformation. Analysis focuses on effect of local denting on global deformation and inertial effect of the structure. Large deflection effects are determined by using the membrane factor method. A set of finite element...

chapter

Lifetime estimation for battery with the regeneration phenomena in both degradation state and rate

Jianxun Zhang, Changhua Hu, Xiao He, Xiaosheng Si, more

2017 Prognostics and System Health Management Conference (PHM-Harbin) > 1 - 6

2017 Prognostics and System Health Management Conference (PHM-Harbin)

Battery is a typical degradation product, which has been widely applied in industry or in our daily life. However, due to the shutdown during a short period, the regeneration phenomena may occur and further affect the degradation state and rate. In this paper, we concentrate on degradation modeling for such degradation process with the regeneration phenomena. Firstly, we adopt the traditional Wiener...

chapter

Improved live-wire algorithm for kidney image segmentation

Hongliang Li, Yu Dai, Jianxun Zhang

2017 36th Chinese Control Conference (CCC) > 10890 - 10895

2017 36th Chinese Control Conference (CCC)

Live-Wire segmentation algorithm is an interactive tool for efficient, accurate and reproducible boundary extraction which requires minimal user input. But the traditional Live-Wire algorithm is sensitive to noise and inefficient to distinguish between strong and weak edges in the image. To overcome the two drawbacks, this paper proposes an improved Live-Wire algorithm, its cost function is redefined:...

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ROBOT KINEMATICS (9)
SURGERY (9)
ROBOTS (8)
BONES (6)
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FORCE (5)
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METAL FOAM (3)
MILLING (3)
MINIMALLY INVASIVE SPINE SURGERY (3)
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OVERALL BENDING (3)
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PREFETCHING (3)
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DELINQUENT LOAD (2)
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DIGITAL SIGNAL PROCESSING (2)
DIRECTED GRAPHS (2)
DSP (2)
DYNAMIC PLASTICITY (2)
DYNAMIC STRAIN AGING (2)
FRAGRANCES (2)
GEOMETRICAL ASYMMETRY (2)
HARDWARE (2)
HILIC–MS–MS (2)
HOTSPOT PROFILING (2)
INTERFACE (2)
JOINTS (2)
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MAXIMUM LIKELIHOOD ESTIMATION (2)
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PITTING CORROSION (2)
PLASMA NITRIDING (2)
PREFETCHING THREAD (2)
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PULSED ND:YAG LASER WELDING (2)
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2.25CR-1MO STEEL (1)
4-(METHYLNITROSAMINO)-1-(3-PYRIDYL)-1-BUTANONE (1)
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INFONA - science communication portal

Search results for: Jianxun Zhang

Remaining useful life prediction method for rolling bearings based on hybrid dilated convolution transfer

Insight into the pitting corrosion behavior of laser‐welded R60702 zirconium alloy in chloride electrolyte

Highly Flexible, High‐Performance, and Stretchable Piezoelectric Sensor Based on a Hierarchical Droplet‐Shaped Ceramics with Enhanced Damage Tolerance

Construction of Flexible Piezoceramic Array with Ultrahigh Piezoelectricity via a Hierarchical Design Strategy

Theoretical kinetics investigations of the reaction HO + SO ↔ H + SO₂ on an accurate full‐dimensional potential energy surface

Surgical Tool Handle Vibration‐Based Drilling State Recognition During Hip Fracture Fixation

Degradable Hemostatic Antibacterial Zein Nanofibrous Mats as Anti‐Adhesive Wound Dressing

Dynamic In‐Plane Compression of Asymmetric Metal Corrugated Sandwich Columns

Tissue discrimination by bioelectrical impedance during PLL resection in anterior decompression surgery for treatment of cervical spondylotic myelopathy

Direct analysis of volatile components from intact jujube by carbon fiber ionization mass spectrometry

Dynamic collapse of metal self-similar hierarchical corrugated sandwich plates

High-Temperature Low-Cycle Fatigue Behavior of HS80H Ferritic–Martensitic Steel Under Dynamic Strain Aging

Crushing and energy absorption of density-graded foam-filled square columns: Experimental and theoretical investigations

Cyclic hardening and dynamic strain aging during low-cycle fatigue of Cr-Mo tempered martensitic steel at elevated temperatures

Large deflections of multilayer sandwich beams with metal foam cores under transverse loading

Three-dimensional finite element analysis of residual stresses in circumferential welds of 2205/X65 bimetallic pipe

Dynamic response of square sandwich plates with a metal foam core subjected to low-velocity impact

On low-velocity impact response of metal foam core sandwich beam: A dual beam model

Lifetime estimation for battery with the regeneration phenomena in both degradation state and rate

Improved live-wire algorithm for kidney image segmentation

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