Article
Materials Science, Ceramics
Pengcheng Hu, Yuansheng Cheng, Pan Zhang, Jun Liu, Haifu Yang, Jianyong Chen
Summary: A novel multi-layered composite armor system is proposed for ballistic protection, consisting of ductile metal, ceramic/UHMWPE composite, and ductile metal layers. Experimental and numerical studies show that optimal placement of the ceramic layer can significantly reduce residual velocity, while maximizing total energy absorption can be achieved by optimizing the ceramic placement strategy. Specific energy absorption of the UHMWPE layer can be significantly improved with a higher mass ratio, benefiting the energy absorption capability of the composite armor.
CERAMICS INTERNATIONAL
(2021)
Article
Mechanics
Mengting Tan, Xianfeng Zhang, Wei Xiong, Chuang Liu, Guoqing Han, Yi Li
Summary: This paper establishes an analytical model of three-layer ceramic composite armor considering the effect of interface defeat and cooperative deformation of the back plate. The model is verified through experiments and literature. The influence of the layered back plate on ceramic damage evolution and energy absorption is discussed. The results show that the arrangement of metal and fiber has no significant effect on ceramic damage evolution. The minimum ceramic thickness should be four times the projectile radius to delay tensile failure and induce interface defeat/dwell phenomenon.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Ceramics
Zhiwei Shen, Xiancong Huang, Tian Ma, Weiping Li, Junxian Chen
Summary: This article investigates the impact of laminated ceramic structures on multiple ballistic performance and finds that laminated SiC/BN structures exhibit higher residual ballistic performance and less sensitivity to multiple ballistic impacts compared to monolithic SiC structures.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yang Jiang, Kun Qian, Yaoliang Zhang, Yunpeng Xia, Ziming Xiong, Zhongwei Zhang, Kejing Yu
Summary: The study focuses on improving the design of lightweight, high-performance bulletproof armors through the use of different ceramic/fiber laminate composite armors. The research also establishes a numerical simulation model that accurately describes the contribution of ceramics in terms of energy dissipation.
MATERIALS & DESIGN
(2022)
Article
Polymer Science
Li Ding, Xiaohui Gu, Peihui Shen, Xiangsheng Kong
Summary: This study designs a composite armor made of ultra-high molecular weight polyethylene (UHMWPE) laminates and Q235 steel face sheets, and analyzes its ballistic performance, failure mechanism, and ballistic limit through experimental and numerical simulation. The experimental and numerical results are consistent, providing necessary data for analyzing the dynamic response of composite structures under the impact of sharp head penetrators.
Article
Chemistry, Physical
Weizhan Wang, Taiyong Zhao, Fangao Meng, Peng Tian, Guanglei Li, Zhigang Chen
Summary: This study prepared a ZrO2 ceramic material suitable for kinetic energy projectiles through a special process, which can be matched with a metal core to form a ceramic composite projectile, enhancing the damage to ceramic composite armor.
Article
Chemistry, Physical
Peng Si, Yan Liu, Junbo Yan, Fan Bai, Fenglei Huang
Summary: The ballistic performance of polyurea-reinforced ceramic/metal armor was evaluated, and it was found that the mass efficiency of polyurea-coated armor was higher than that of ceramic/metal armor. This improvement was due to the energy absorption of polyurea during glass transition.
Article
Engineering, Multidisciplinary
Ali Ansari, Tayebeh Akbari, Masoomeh Rahimi Pishbijari
Summary: This research investigates the ballistic behavior of ceramic-reinforced aluminum matrix composite plates and provides an optimal design for protection. The results show that the specimen with 25mm thickness and 30% alumina is most effective in terms of ballistic protection.
DEFENCE TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Lihong Yang, Zongbing Chen, Yalun Dong, Fan Zi, Jinshui Yang, Linzhi Wu
Summary: A new type of composite armor, utilizing piecewise ceramic tiles and metal grids, has been designed to enhance the ballistic properties and reduce the damage area of the ceramic layer.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Ningyu Kang, Jianzhong Lai, Jiehang Zhou, Longyu Du, Jinfeng Cao
Summary: A composite armor consisting of ceramic balls/UHPC panel was proposed to enhance impact resistance, based on the study of the penetration process of a 10 mm armor-piercing projectile. Factors such as ceramic ball diameter, number of ceramic ball layers, and constraint effect were discussed in relation to impact resistance. The results showed that the composite armor with ceramic balls exhibited excellent impact resistance, aided by the constraint effect provided by the UHPC matrix. ANSYS/LS-DYNA simulation was used to analyze the changes in velocity, damage, and energy during the penetration process, and the impact resistance under different impact points was studied. A probabilistic impact model of ceramic balls composite armor was established to guide the selection of ceramic ball diameter according to projectile diameter.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Materials Science, Composites
Rafael R. Dias, Ademir J. Zattera, Iaci M. Pereira, Bluma G. Soares
Summary: The study compared the mechanical and ballistic properties of composites using different matrix materials for para-aramid plain-woven fabric, finding that composites containing HDPE/MMT as the matrix exhibited the highest ballistic limit and superior dynamic response.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Physical
Imtiaz Alam Shah, Rafiullah Khan, Seyed Saeid Rahimian Koloor, Michal Petru, Saeed Badshah, Sajjad Ahmad, Muhammad Amjad
Summary: The study analyzed the ballistic impact behavior of auxetic sandwich composite human body armor using finite element analysis. The results showed that the auxetic armor exhibited improved indentation resistance and higher energy absorption compared to conventional monolithic armor. The armor could be safely used up to 400 m/s, with higher velocities significantly reducing the threat level.
Article
Chemistry, Physical
Miao Sun, Wuxiong Cao, Diqi Hu, Nana Zhang, Runqiang Chi
Summary: The study shows that fixing cover plates with confining tubes can increase pressure on SiC targets and prolong dwell time of tungsten rods, leading to higher ballistic performance. Additionally, the transition impact velocities for SiC targets with fixed cover plates have stable growth rates and are lower compared to those with free cover plates. Thickness thresholds exist for both fixed and free cover plates, with the ideal thickness for cover plates ranging from 3 mm to 5 mm for optimal ballistic performance and economy.
Article
Engineering, Civil
Peng Si, Yan Liu, Junbo Yan, Fan Bai, Zhenqing Shi, Fenglei Huang
Summary: In this study, different positions and thicknesses of polyurea layers in polyurea-reinforced ceramic/metal armor were systematically investigated. Experimental data showed that a 1.1 mm thick polyurea layer on the front face effectively increased the ballistic limit velocity and energy absorption. Furthermore, a three-dimensional finite element model was used to explore the protective mechanism of the polyurea layer.
Article
Materials Science, Ceramics
Zihan Xin, Yangwei Wang, Qiang Fu, Huanwu Cheng, Xingwang Cheng, Jian Zhang
Summary: The addition of a glass cover layer to transparent ceramic armor negatively impacts its ballistic performance, as the ceramic tiles are prematurely damaged and the energy dissipation is reduced compared to the glass cover itself. Increasing the thickness of the glass cover also leads to a larger pre-damage area.
CERAMICS INTERNATIONAL
(2021)
Article
Obstetrics & Gynecology
Annamalai Natarajan, Grace Lam, Jingyi Liu, Andrew L. Beam, Kristyn S. Beam, Jonathan C. Levin
Summary: This study aimed to develop machine learning models to predict extubation failure in low birthweight neonates using a large dataset. Logistic regression and boosted-tree models were used, incorporating demographics, medications, and vital sign and ventilatory data. The best-performing model achieved an AUROC of 0.82, with birthweight, last FiO(2), average mean airway pressure, caffeine use, and gestational age as the most important features. These models can identify low birthweight ventilated neonates at risk for extubation failure. Validation across multiple centers is needed for generalizability.
JOURNAL OF PERINATOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Xiaoping Liu, Xiao Tian, Jian Shi, Shunhai Xu, Linying Bai, Shaoping Wang
Summary: This paper proposes a reliability assessment method based on uncertainty theory to address the multi-dimensional cognitive uncertainties in performance degradation modeling for small samples. The degradation model considers uncertainties from time fluctuation, measurement error, and individual differences, and a parameter estimation method is proposed and verified through numerical simulation. The results indicate the significant impact of uncertainty on product reliability.
JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION
(2023)
Article
Biochemistry & Molecular Biology
Muhammad Usman Ghani, Francis Joseph H. Campena, Muhammad Kashif Maqbool, Jia-Bao Liu, Sanaullah Dehraj, Murat Cancan, Fahad M. Alharbi
Summary: Entropy is a measure of a system's molecular disorder or unpredictability due to organized molecular motion. Shannon's entropy metric is used to represent the variability of a random graph. Entropy is a thermodynamic function that describes the randomness and disorder of molecules in a system or process based on their possible configurations. Distance-based entropy has been applied to solve various problems in mathematics, biology, chemical graph theory, and chemistry. In this paper, the K-Banhatti entropies and molecular invariants are studied for C6H6 embedded in different chemical networks. Atom-bond partitioning based on valences is used to analyze the valency-based molecular properties. The precise values of various K-Banhatti entropies are obtained for the three chemical networks.
Article
Biochemistry & Molecular Biology
El Sayed M. Tag El Din, Faisal Sultan, Muhammad Usman Ghani, Jia-Bao Liu, Sanaullah Dehraj, Murat Cancan, Fahad. M. M. Alharbi, Abdullah Alhushaybari
Summary: Topological indices, obtained mathematically from the graph's topological structure, are useful for measuring the chemical characteristics of compounds. They are connected to physicochemical aspects of compounds and are frequently used in theoretical chemistry to simulate their characteristics.
Article
Agriculture, Dairy & Animal Science
Cong Huang, Yuanling Huang, Zhiyi Liu, Jia Li, Jingyi Han, Yingnan Liu, Jingyi Liu, Hongjun Chen, Zongyan Chen
Summary: In 2018, a disease characterized by splenic hemorrhage and necrosis caused significant mortality among ducks in a farm in Guangxi province, China. A strain of duck reovirus, designated DRV-GL18, was isolated from the dead ducks, and further analysis revealed its genetic features and pathogenicity. This finding suggests the potential for developing a vaccine against this severe duck disease.
Article
Environmental Sciences
Qianyuan Liu, Minghua Song, Liang Kou, Qingkang Li, Huimin Wang
Summary: Nitrogen is a key element that limits plant growth and metabolism. Adding nitrogen can affect plant growth, nitrogen uptake, and species interactions, while adding phosphorus may affect nitrogen acquisition. However, there is limited and controversial knowledge about how nutrient availability influences nitrogen uptake and species interactions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Materials Science, Ceramics
Shiheng Hu, Jinpeng Song, Jiaojiao Gao, Jiabao Liu, Weiqi Meng, Yao Wang
Summary: The TiCN-HfN/TiCN-WC(THTW) laminated ceramics with different layer thickness ratio were prepared and studied for their residual stress, microstructure, and mechanical properties. Simulation results revealed alternating distribution of compressive and tensile stress layers, with decreasing residual compressive stress as layer thickness ratio increased. Cracks deflection and bridging, as well as the coexistence of transgranular and intergranular fractures, improved the comprehensive mechanical properties. The relative density and flexural strength initially increased and then decreased with increased layer thickness ratio. The hardness of TiCN-HfN layer first decreased and then increased, while fracture toughness decreased continually. Fracture toughness and Vickers hardness of TiCN-WC layer increased constantly. The laminated ceramic with a layer thickness ratio of 0.8 exhibited the best comprehensive mechanical properties, including a surface hardness of 16.93 +/- 0.30 GPa, surface fracture toughness of 7.91 +/- 0.12 MPa m1/2, flexural strength of 1293.54 +/- 10 MPa, and fracture toughness of 8.25 +/- 0.08 MPa m1/2.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Applied
Honghua Cao, Danping Liu, Ling Zhi, Jingyi Liu, Yonghao Liu, Huiwen Xu, Dongfeng Wang, Ying Xu, Changhu Xue, Xun Sun
Summary: The novel crosslinker NOXIN synthesized in this study can stabilize rehydrated sea cucumber (RSC), enhance its mechanical strength and water holding capacity, and suppress protein degradation.
Article
Forestry
Chuanpeng Cheng, Tao Zhang, Fengting Yang, Qingkang Li, Qianyu Wang, Mingjie Xu, Shengtong Li, Huimim Wang
Summary: This study investigates the effects of thinning on soil physicochemical properties, soil respiration, stump respiration, and carbon release in a subtropical plantation. The results show that thinning promotes soil respiration and stump respiration, leading to increased carbon release. It suggests that understanding the effects and mechanisms of thinning on carbon release is crucial for accurate estimation of forest carbon budgets under future climate change.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Mathematics, Interdisciplinary Applications
Jia-Bao Liu, Bing-Yue Zhao
Summary: Due to the growth of Chinese economy, environmental problems have become a prominent difficulty in economic growth and social development. In order to respond to Anhui Province's environmental protection policy, all prefecture-level cities need to be evaluated for their environmental efficiency. This study uses MaxDEA software to calculate the environmental efficiency of Anhui Province's 16 prefecture-level cities from 2015 to 2020 and analyzes the future trend using rescaled range analysis (R/S). The results show that there is room for improvement in environmental efficiency and some suggestions on environmental technology are proposed.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Xiaoping Liu, Lijian Xia, Jian Shi, Lijie Zhang, Linying Bai, Shaoping Wang
Summary: This article proposes an antinoise bearing fault diagnosis method based on improved RP and a convolutional neural network (CNN). It constructs RP by obtaining different scales of approximation coefficients and detail coefficients through wavelet packet decomposition (WPD) on the vibrational signal. Redundant parts of each RP are removed based on symmetry characteristics, and the remaining parts are spliced into multiscale asymmetric RP (MARP). A fault diagnosis model for rolling bearing is established using MARP as input for the pretrained ResNet-34. The proposed method achieves an accuracy of 90% under Gaussian white noise with a signal-to-noise ratio (SNR) of above -6 dB, as validated on the Paderborn bearing dataset.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Hengyuan Zhang, Binbin Wu, Jingyi Liu, Zhaodong Liu, Filippo S. Boi, Duanwei He, Tetsuo Irifune, Li Lei
Summary: We describe a new high-pressure coupling (HPC) reaction that combines Re nitridation with Fe3N solid-state metathesis at high pressure, resulting in the synthesis of a spherical bulk RexN/Fe3N composite. By coupling the HPSSM reactions, the synthesis pressures for Re nitridation were successfully reduced from 13 to 10 GPa (for Re3N) and from 20 to 15 GPa (for Re2N). The composite, with RexN species encapsulated in Fe3N, exhibits soft magnetic behavior, and the nitrogen content in RexN (x = 2 or 3) can be controlled by adjusting the P-T conditions. This HPC reaction presents a novel approach for bulk synthesis of 5d transition metal nitrides.
INORGANIC CHEMISTRY
(2023)
Article
Mathematics, Applied
Jia-Bao Liu, Qing Xie, Jiao-Jiao Gu
Summary: There has been a surge of research on complex networks recently. This paper studies the mathematical properties of random pentagonal chain networks PECn using graph theory. The expected values of the Gutman index, Schultz index, multiplicative degree-Kirchhoff index, and additive degree-Kirchhoff index are obtained based on the PECn networks, and their variance expressions are derived. It is found that all their limiting distributions have the probabilistic and statistical significance of a normal distribution.
JOURNAL OF FUNCTION SPACES
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Liang Zhu, Shitian Wang, Zhaoyong Sun, Jingyi Liu, Menghua Dai, Xianlin Han, Qiang Xu, Naishi Li, Marcel Dominik Nickel, Huadan Xue, Zhengyu Jin
Summary: This study evaluates the ability of native T1 value and ECV of the pancreas in predicting postoperative NODM and worsened glucose tolerance in patients undergoing major pancreatic surgeries. The results show that native pancreatic T1 value and ECV are significantly higher in diabetic patients compared to prediabetic/non-diabetic patients, and ECV is also significantly higher in pre-diabetic patients compared to nondiabetic patients. Pancreatic ECV predicts the risk of postoperative NODM and worsened glucose tolerance in patients undergoing major pancreatic surgeries.
EUROPEAN JOURNAL OF RADIOLOGY
(2023)
Article
Mathematics, Applied
Bao-Hua Xing, Nurten Urlu Ozalan, Jia-Bao Liu
Summary: The aim of this paper is to show the successful use of degree sequences in certain graph products, leading to new distinguishing results. By considering the degree sequences of tensor and cartesian products, the omega invariant is obtained. It is concluded that the set of graphs forms an abelian semigroup in the case of tensor product and an abelian monoid in the case of cartesian product. Additionally, the paper provides a significant result on the distributive law.
