Review
Energy & Fuels
Ying Zhang, Weichu Yu
Summary: This paper provides an overview of the synthesis methods of hyperbranched polymers, analyzing the advantages and disadvantages of different methods. Furthermore, it describes the research progress of hyperbranched polymers in oilfield chemistry and discusses their application advantages and existing problems in various areas. Finally, it forecasts the application prospects of hyperbranched polymers in drilling, oil recovery, and gathering and transportation chemistry.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Polymer Science
Songyi Li, Yihua Cui, Jingjing Li
Summary: By synthesizing thiol-terminated hyperbranched polymer (T-HBP) and introducing it into the photosensitive resin system, the volume shrinkage of the DLP 3D printing resin can be significantly reduced, while also improving impact strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Jianjian Sun, Yujuan Jin, Bo Wang, Huafeng Tian, Kaier Kang, Shuang Men, Yunxuan Weng
Summary: Long-chain hyperbranched polymers (LCHBPs) were successfully synthesized by grafting stearic acid onto hyperbranched polyesters (HBPE), leading to improved mechanical properties when blended with polylactic acid (PLA) at a certain ratio.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
You Wu, Yujuan Jin, Jian Huang, Huafeng Tian, Yunxuan Weng
Summary: The experiment synthesized Phenyl terminated hyperbranched polyesters (HBP-Bs) for toughening poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) directly by melt blending. It was found that adding HBP-Bs significantly decreased the crystallinity, increased impact strength and elongation at break of the PHBV blends, and improved the microstructure of the blends.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Jianjian Sun, Yansong Huang, Yujuan Jin, Huafeng Tian, Shuang Men
Summary: In this study, highly aromatic hyperbranched polyamide (HBPA) was synthesized and used as a modifier to enhance the physical performance of polylactic acid (PLA). The results showed that the addition of HBPA significantly improved the tensile strength and fracture energy of PLA. Polarized optical microscope images suggested that HBPA acted as a nucleating agent for PLA during crystallization, possibly due to the formation of hydrogen bonds and/or chemical crosslinking between HBPA and PLA.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Applied
M. Arkas, M. Douloudi, E. Nikoli, G. Karountzou, I Kitsou, E. Kavetsou, D. Korres, S. Vouyiouka, A. Tsetsekou, K. Giannakopoulos, M. Papageorgiou
Summary: In this study, silver nanoparticles were synthesized using PEI as a template and immobilized on silica substrates to create hybrid nanocatalysts. The effects of different PEIs and pH regulators were investigated, and the catalytic performance was improved through organic scaffold pyrolysis. This eco-friendly synthesis procedure proved to be a successful alternative for producing multifunctional nanomaterials at ambient temperature.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Biochemical Research Methods
Yao Luo, Guoyi Yu, Fei Liu, Yanwen Feng, Pei Zhao, Jun Yue
Summary: The nontraditional intrinsic fluorescence (NTIF) of polymers containing heteroatoms has been studied for label-free bioimaging applications. Hyper-branched polyureas (aBPUs) with different degrees of branching (DBs) or different modifications were synthesized to investigate their NTIF properties. The results showed that aBPUs exhibited obvious NTIF phenomenon and the NTIF enhanced with the increase of DBs. Chemical modifications and the formation of nanoassembly also affected the NTIF performances.
BIOCONJUGATE CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Xiaoya Li, Xiao Wang, Sathiyaraj Subramaniyan, Yang Liu, Jingyi Rao, Baozhong Zhang
Summary: This study developed a new nontoxic antimicrobial coating using nonionic hyper-branched polyesters (HBPs) derived from indole and lignin resources. These HBPs exhibited significant antibacterial effects on a silicon substrate against Gram-negative and Gram-positive bacteria, and showed excellent biocompatibility for potential biomedical applications.
Article
Chemistry, Multidisciplinary
Michael Arkas, Konstantinos Giannakopoulos, Evangelos P. Favvas, Sergios Papageorgiou, George V. Theodorakopoulos, Artemis Giannoulatou, Michail Vardavoulias, Dimitrios A. Giannakoudakis, Konstantinos S. Triantafyllidis, Efthalia Georgiou, Ioannis Pashalidis
Summary: Two different silica conformations, xerogels and nanoparticles, were tested for uranyl cation sorption at low pHs using dendritic poly (ethylene imine) as a mediator. The study investigated the effect of factors such as temperature, electrostatic forces, adsorbent composition, pollutant accessibility, and organic matrix properties to determine the optimal formulation for water purification. Through various techniques including spectroscopy, light scattering, porosimetry, TGA, and SEM, the results showed that both adsorbents exhibited extraordinary sorption capacities. Xerogels were cost-effective and could be used to create composite purification devices.
Article
Engineering, Multidisciplinary
Junhao Peng, Tengjie Chen, Guoai Xu
Summary: This study focuses on improving the trapping efficiency in regular branched networks by analyzing biased random walks on a family of weighted Cayley trees. By calculating quantities for measuring the trapping efficiency and optimizing with respect to parameter r, the highest trapping efficiency can be achieved in different scenarios.
IEEE TRANSACTIONS ON NETWORK SCIENCE AND ENGINEERING
(2022)
Article
Polymer Science
Beibei Chen, Maliha N. Syed, Samantha P. Daymon, Brian G. Olson, Oluwapelumi O. Kareem, Joseph A. Giesen, Gregory B. Fahs, Robert R. Moore, Scott M. Grayson, Sergei Nazarenko
Summary: In this study, a second generation perfectly branched dendrimer was synthesized and compared with a chemically similar but hyperbranched polymer using various characterization tools to investigate structure-bulk property relationships. High-pressure dilatometry was utilized to study the effects of temperature and pressure on the specific volume of the dendrimer and its hyperbranched polymer counterpart. The Simha-Somcynsky equation of state was successfully applied to describe the specific volume surfaces of the dendrimer and hyperbranched polymer, demonstrating its versatility across different polymeric systems.
Article
Chemistry, Physical
Weihang Li, Hui Liu, Hao Wang, Yiwen Chen, Yan Peng, Haitao Wu, Yujia Hou, Yue Huang, Zhaoyang Yuan, Bangjiao Ye, Hongjun Zhang, Jinrong Wu
Summary: Loose connective tissue in the human body has a unique network structure that makes it tough and healable. Inspired by this structure, a class of tough and healable polymeric glasses (THGs) was developed by creating salt bridges between a hyperbranched polymer and high-molecular-weight linear copolymers. THGs exhibit high yield strength, Young's modulus, and toughness, outperforming most commercial glassy polymers. Furthermore, THGs can be easily healed below and around the glass-transition temperature. This biomimetic approach enables the development of glassy polymers with a combination of high strength, excellent toughness, and self-healing ability.
CHEMISTRY OF MATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Lihua Bai, Pengfei Yang, Liulong Guo, Susu Liu, Hongxia Yan
Summary: In this study, a truly multicolor emissive hyperbranched polysiloxane material was successfully synthesized by adjusting the distribution of electron-rich atoms and grafting s-cyclodextrin. The material exhibited high quantum yields and could be used as a multisensitivity sensor and cellular imaging material. It also showed high drug loading capacity and pH-controlled drug release in drug delivery systems.
Article
Chemistry, Multidisciplinary
Lihua Bai, Xiangrong Liu, Hongxia Yan, Shunsheng Zhao, Xiang Han
Summary: Biocompatible polymers with nontraditional intrinsic luminescence (NTIL) have the advantages of environmental friendliness and facile structural regulation. The emission wavelength of hyperbranched polysiloxane (HBPSi) can be regulated by adjusting the alkane chain lengths. Shorter alkane chains generate longer-wavelength emissions. The emission is attributed to electronic communication among functional groups and the formation of spatial electronic delocalizations.
Review
Polymer Science
David Santiago, Angels Serra
Summary: Hyperbranched polymers and multiarm star polymers, as dendritic polymers, have unique properties. By using these polymers to modify epoxy resins, the final properties of materials can be controlled, such as increasing toughness, flexibility, and fire retardancy.
Article
Automation & Control Systems
Xiaoling Wang, Housheng Su, Fan Zhang, Guanrong Chen
Summary: This article investigates the state estimation problem of a continuous-time linear time-invariant system in the presence of unknown external disturbance and measurement noise. A robust distributed interval observer is designed, which consists of a group of sensors communicating through a directed graph. The communication, heterogeneity, and undetectability of the sensors impose stringent requirements on the observer construction. To address these restrictions, an internally positive representation from a single agent system is introduced. Numerical simulations are conducted to validate the theoretical results.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2023)
Article
Automation & Control Systems
Xu Zhang, Guanrong Chen
Summary: A new geometric criterion is developed to determine the existence of chaos in continuous-time autonomous systems in three-dimensional Euclidean spaces. This criterion differs from traditional methods as it does not rely on equilibrium points or the condition of transversal homoclinic or heteroclinic orbit of a Poincare map.
JOURNAL OF DYNAMICAL AND CONTROL SYSTEMS
(2023)
Article
Computer Science, Artificial Intelligence
Qiang Lai, Zhiqiang Wan, Hui Zhang, Guanrong Chen
Summary: This article presents a design of a new Hopfield neural network that can generate multiscroll attractors by utilizing a new memristor as a synapse in the network. The memristor is constructed with hyperbolic tangent functions and its parameters can effectively control the number of double scrolls in an attractor. Numerical analysis reveals amplitude control effects and quantitatively controllable multistability. Furthermore, a novel image encryption scheme based on the proposed memristive neural network is designed and evaluated, demonstrating good encryption performances.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Computer Science, Hardware & Architecture
Mingzhe Zhu, Wanyue Xu, Zhongzhi Zhang, Haibin Kan, Guanrong Chen
Summary: In this paper, the resistance distances in networks with higher order interactions are studied, and exact formulas for various quantities related to resistance distances are derived. The results show that the average resistance distance tends to a q-dependent constant.
Article
Automation & Control Systems
Guanghui Wen, Peijun Wang, Yuezu Lv, Guanrong Chen, Jialing Zhou
Summary: This paper studies the problem of secure consensus for multiple-input-multiple-output (MIMO) linear multi-agent systems (MASs) under denial-of-service (DoS) attacks and proposes corresponding control schemes and conditions. By designing an unknown input observer and using multiple Lyapunov functions, it is shown that secure consensus can be achieved under certain threshold conditions.
ASIAN JOURNAL OF CONTROL
(2023)
Article
Automation & Control Systems
Yong Wang, Zhuo Liu, Leo Yu Zhang, Fabio Pareschi, Gianluca Setti, Guanrong Chen
Summary: This article performs a theoretical study on pseudorandom number generation using the well-studied 2-D coupled map lattice (2D CML). It proposes a method to extract uniformly distributed independent bits from the system orbits and demonstrates its effectiveness through simulation experiments.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Physics, Multidisciplinary
Jiashuo Sun, Linying Xiang, Guanrong Chen
Summary: In this article, the dynamical robustness of a directed complex network with additive noise is studied. The failure of a node in the network is modeled by injecting noise into the node. A new robustness metric is formulated to characterize the synchronization of the network to the additive noise under the framework of mean-square stochastic stability. It is found that the node dynamics plays a crucial role in the dynamical robustness of the directed network. Numerical simulations are provided for illustration and verification.
FRONTIERS IN PHYSICS
(2023)
Article
Automation & Control Systems
Mengfei Niu, Guanghui Wen, Yuezu Lv, Guanrong Chen
Summary: This paper presents a new design of an innovation-based stealthy attack strategy against distributed state estimation over a sensor network. The optimal distributed MMSE estimator is developed by fusing interaction measurements from neighboring nodes in the absence of network attack. The tradeoff between attack stealthiness and attack effects is determined by proposing a stealthy attack framework embedded with an adjustable parameter.
Article
Automation & Control Systems
Fang Yuan, Shaoyan Li, Yue Deng, Yuxia Li, Guanrong Chen
Summary: In this article, a Cu-doped TiO2-x nanoscale memristor is built and its accurate mathematical model is established. The reliable performance of the memristor and the correctness of its mathematical model are demonstrated through numerical simulations and hardware experiments, revealing its chaotic system dynamics.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Jie-Ning Wu, Xiang Li, Guanrong Chen
Summary: This article examines the controllability of multi-input/multi-output linear time-invariant systems in a snapback interlayer coupling framework. It establishes necessary and sufficient conditions for the controllability of three-layer snapback networks and obtains controllability conditions for the superposition of these networks. These conditions are related to smaller scale factor networks and illustrate the impact of interlayer coupling frameworks, intralayer network topologies, node dynamics, inner interactions, and external control inputs on the controllability of snapback networks. The controllability conditions of three-layer snapback networks are also extended to the M-layer setting. Several examples are provided to illustrate the effectiveness of these controllability conditions.
IEEE TRANSACTIONS ON CONTROL OF NETWORK SYSTEMS
(2023)
Article
Mathematics
Jiali Wang, Changbing Tang, Jianquan Lu, Guanrong Chen
Summary: In this paper, a decision optimization method based on zero-determinant (ZD) strategies is proposed to help workers in a crowdsourcing system make optimal decisions under incomplete information. The problem is formulated as an iterated game with incomplete information, and the optimal decision of workers in terms of ZD strategies is analyzed. Numerical simulations are conducted to demonstrate the performances of different strategies and the impact of parameters on the payoffs of workers.
Article
Automation & Control Systems
Zhen Liu, Liangguang Pan, Guanrong Chen
Summary: In this article, a computational model called link-information augmented twin autoencoders is proposed to remove noisy links from observed network and recover the real network. Extensive experiments show that the proposed model outperforms other methods in network denoising and provides interpretable evidence to support its superiority.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Mathematics, Interdisciplinary Applications
Yuqian Zhou, Guanrong Chen, Jibin Li
Summary: By applying the techniques from dynamical systems and singular traveling wave theory developed by Li and Chen [2007] to analyze the traveling wave system of the cubic Camassa-Holm type equation, it has been discovered that the bifurcation portraits of this equation exhibit all possible exact explicit bounded solutions (solitary wave solutions, periodic wave solutions, peakon as well as periodic peakons) under different parameter conditions. A total of 19 explicit exact parametric representations of the traveling wave system of the Camassa-Holm type equation are provided.
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
(2023)
Article
Computer Science, Artificial Intelligence
Jiajun Zhou, Zhi Chen, Min Du, Lihong Chen, Shanqing Yu, Guanrong Chen, Qi Xuan
Summary: In this paper, robust community detection methods are proposed to improve the performance and robustness of community detection for real-world networks. By enhancing network structure through two generic algorithms, significant performance improvement is achieved for representative community detection algorithms. Additionally, the new methods also optimize the network structure and enhance robustness against adversarial attack.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Mathematics, Applied
Zhensu Wen, Guanrong Chen
Summary: This paper uses the methodology of dynamical systems and singular traveling wave theory to prove the existence of all possible bounded solutions of the traveling wave system in the Hertz chain model under different parameter conditions. Furthermore, it obtains 23 exact explicit parametric representations for various types of traveling wave systems.
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES S
(2023)
