Article
Polymer Science
Li Yang, Xuanyu Shi, Shihao Sun, Jun Zhong, Xiaofeng Yu, Danling Wang, Yihu Song, Min Zuo, Qiang Zheng
Summary: The morphology/structure and nonlinear viscoelasticity of rubber blends under large strain were investigated. It was found that the heterogeneous gel-like structure of the blends can weaken strain softening and improve modulus hysteretic recovery. The increasing interfacial energy of domain deformation also contributes to additional elasticity.
Article
Polymer Science
Mehmet Kodal, Nazli Yazici Cakir, Rumeysa Yildirim, Nursel Karakaya, Guralp Ozkoc
Summary: This study investigates the influence of multi-walled carbon nanotubes on the performance of rubber nanocomposites and finds that adding multi-walled carbon nanotubes can improve the thermal conductivity and hardness of the composites.
Article
Engineering, Mechanical
Oliver Gehrmann, Nils Hendrik Kroeger, Alan Muhr
Summary: Fatigue tests were conducted on filled natural rubber (NR) and styrene butadiene rubber (SBR) materials, showing a significant evolution of strain in the narrow section during fatigue. The effect of changing strains depends on both the material and test piece geometry. A method was introduced to convert changing strains into a constant equivalent strain compliant with a Wohler curve, with finite element simulations indicating potential application to other test piece geometries or components.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Polymer Science
Chenchao Fu, Run Zhang, Jing Tian, Qun Yang, Ping Xue, Xiaonong Chen
Summary: A great many important physical/chemical properties of polymers are determined by the conformation of polymer chains. However, the understanding of how nanofillers affect polymer chains is still incomplete, especially for ultrahigh-molecular-weight polyethylene (UHMWPE) with long molecular chains. In this study, cylindrical multi-walled carbon nanotubes (MWCNT) and lamellar graphene nanoplatelets (GNP) were used to modify UHMWPE and investigate their effects on chain conformations. The results showed that a lower density of physical entanglement points can be achieved in UHMWPE composites with less nanomaterials, especially those modified by GNP and MWCNT simultaneously. The addition of GNP and MWCNT together can form a continuous structure surrounding the UHMWPE molecular chains, hindering their movement.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Engineering, Environmental
M. Vahdatbin, M. Jamshidi
Summary: This study investigated the devulcanization of NR/SBR blend using a new chemical devulcanizing agent (VitaX) and microwave irradiation. The effects of irradiation time, stirring speed, particle size, and VitaX content on the devulcanization process were evaluated. The results showed that the chemical-microwave assisted devulcanization method is a promising approach for recycling rubber.
RESOURCES CONSERVATION AND RECYCLING
(2022)
Article
Geochemistry & Geophysics
Kenan Zhang, Hao Zhang, Linsong Liu, Yongjie Yang, Lihui Liu, Qinfu Liu
Summary: The study found that calcination and modification treatment improved the dispersibility and mechanical properties of coal gangue in rubber matrix. Additionally, calcination and modification were effective methods to enhance the mechanical and thermal stability of coal gangue filled rubber, with the MGA-SBR composite demonstrating the best performance.
Article
Polymer Science
Tilun Shan, Huiguang Bian, Donglin Zhu, Kongshuo Wang, Chuansheng Wang, Xiaolong Tian
Summary: This paper conducted a mechanistic and experimental study on the replacement of some carbon blacks by spent FCC catalysts for the preparation of rubber products and explored the synergistic reinforcing effect of spent catalysts and carbon blacks, providing theoretical support for the efficient reuse of spent catalysts and reducing environmental pollution.
Article
Engineering, Electrical & Electronic
Xiaowen Ye, Yiding Yu, Liqun Fu
Summary: This paper proposes a deep reinforcement learning (DRL) based link adaptation (LA) technique for selecting efficient modulation and coding scheme (MCS) in the presence of outdated channel quality indicator (CQI) feedback. The goal is to maximize link throughput while achieving a low block error rate (BLER). The paper defines the states, actions, and rewards in DRL and introduces a new experience replay mechanism to balance throughput and BLER.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Materials Science, Composites
Soma A. El Mogy, Samir N. Lawandy
Summary: The goal of this study was to investigate the physical and mechanical properties of a rubber blend filled with nanoclay and waste tire rubber in the presence of bio-resin. The results showed that nanoclay significantly improved the mechanical properties of the blend, including crosslink density, tensile and tear strengths, hardness, compression set, and abrasion resistance. The study also found that the optimal amount of nanoclay filler was 15 phr.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Dohyun Kim, Miguel R. Castellanos, Robert W. Heath
Summary: This article proposes a deep reinforcement learning-based policy for joint relay selection and beam management, which can efficiently select unblocked relays and adapt to changing channel and traffic patterns.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Computer Science, Information Systems
Yanzan Sun, Yanyu Huang, Tao Yu, Xiaojing Chen, Shunqing Zhang
Summary: In this paper, a novel QoS guaranteed joint resource allocation framework for NR with supplementary uplink (SUL) called QGJRA-SUL is proposed, where three parameters of SUL admission, TDD pattern, and band slicing scheme are jointly optimized. The framework is driven by a well-designed deep reinforcement learning agent that can jointly optimize three parameters at the same time using a combination of tanh and softmax activation functions. Simulation results show that the framework can guarantee QoS satisfaction rate and balance the load of slices.
Article
Engineering, Electrical & Electronic
Dariush Salami, Wanru Ning, Kalle Ruttik, Riku Jantti, Stephan Sigg
Summary: This study proposes a mechanism to efficiently share spectrum resources for communication and radar operation using a reinforcement learning (RL)-based approach. Unlike existing methods, this approach allows both systems to keep their own waveforms, resulting in less complex signal processing and improved sensing resolution. The effectiveness of the approach is demonstrated through comprehensive experiments in a simulation environment, showing high accuracy for radar target estimation even in the presence of interference.
IEEE COMMUNICATIONS MAGAZINE
(2023)
Article
Engineering, Multidisciplinary
Fatih Sahin
Summary: This study investigates the effects of using multiwalled carbon nanotubes (MWCNT) as a fuel additive on the combustion characteristics of an HCCI engine. The results show that the addition of MWCNT increases the operating range of the engine, improves combustion parameters, and reduces HC and CO emissions.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2023)
Article
Computer Science, Information Systems
Anupama Hegde, Rui Song, Andreas Festag
Summary: The efficiency of radio resource allocation and scheduling in V2X networks affects link quality. In the unmanaged mode of 5G-NR V2X, SB-SPS loses effectiveness causing resource collisions. This study uses actor-critic methodology to formulate Cellular V2X as a decentralized MDP, improving reliability and achieving higher reception probability.
Article
Engineering, Environmental
Guo-Li Chen, Ming-Song Lv, Li-Li Sui, Zhao-Peng Deng, Ying-Ming Xu, Li-Hua Huo, Shan Gao
Summary: Nanoparticle-supported WO3 sheets were prepared by pyrolysis of WCl6 powder, and their composition and morphology transformation were studied at different calcination temperatures. The W-600 sheet-like structure obtained at 873 K exhibited a cross-linked structure with homogeneous nanoparticles, meso/macro-pore distribution, single-crystal nature, and a small band gap. The sensor achieved dual-sensing to DMA and NO2, showing good response and low detection limits. The sensor also demonstrated reversible response-recovery characteristics, stability, and moisture resistance. The dual-functional sensing mechanism was explored in detail.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Hossein Molavi, Akbar Shojaei
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Engineering, Mechanical
Farhad Ahmadijokani, Yasaman Alaei, Akbar Shojaei, Mohammad Arjmand, Ning Yan
Article
Engineering, Multidisciplinary
Farhad Ahmadijokani, Akbar Shojaei, Mohammad Arjmand, Yasaman Alaei, Ning Yan
COMPOSITES PART B-ENGINEERING
(2019)
Article
Polymer Science
Hossein Molavi, Akbar Shojaei, Seyyed Abbas Mousavi, Seyyed Ahmad Ahmadi
JOURNAL OF APPLIED POLYMER SCIENCE
(2020)
Article
Polymer Science
Samaneh Salkhi Khasraghi, Akbar Shojaei, Uttandaraman Sundararaj
EUROPEAN POLYMER JOURNAL
(2019)
Article
Chemistry, Multidisciplinary
Pooria Rahmani, Akbar Shojaei, Nahid Pirhady Tavandashti
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Article
Environmental Sciences
Hossein Molavi, Milad Neshastehgar, Akbar Shojaei, Hossein Ghashghaeinejad
Article
Materials Science, Multidisciplinary
Sara Aranifard, Akbar Shojaei
DIAMOND AND RELATED MATERIALS
(2020)
Article
Chemistry, Applied
Milad Neshastehgar, Pooria Rahmani, Akbar Shojaei, Hossein Molavi
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Polymer Science
Erfan Jafarpour, Akbar Shojaei, Farhad Ahmadijokani
Article
Engineering, Mechanical
Farhad Ahmadijokani, Akbar Shojaei, Sara Dordanihaghighi, Erfan Jafarpour, Sahar Mohammadi, Mohammad Arjmand
Article
Materials Science, Biomaterials
Samaneh Salkhi Khasraghi, Akbar Shojaei, Uttandaraman Sundararaj
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2020)
Review
Chemistry, Physical
Pooria Rahmani, Akbar Shojaei
Summary: Hydrogels have shown great potential in wearable devices by overcoming the drawbacks of other materials, offering intrinsic electrical conductivity, suitable mechanical properties, and biocompatibility. Researchers are focusing on developing methods, design strategies, sensing performance, and applications of hydrogel-based strain sensors.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Rahman Mohammadkhani, Akbar Shojaei, Pooria Rahmani, Nahid Pirhady Tavandashti, Mahsa Amouzegar
Summary: In this study, nano-sized diamond particles were functionalized through dry thermal oxidation and wet chemistry, leading to the synthesis of PANI/ND hybrid nanostructures which were incorporated into epoxy coatings to enhance corrosion protection. Experimental results indicated that PANI/ND5%-epoxy nanocomposite exhibited improved corrosion resistance compared to other formulations.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Polymer Science
Samaneh Salkhi Khasraghi, Akbar Shojaei, Mohsen Janmaleki, Uttandaraman Sundararaj
Summary: In this study, multifunctional magnetic shape memory polymer nanocomposites were successfully synthesized, showing excellent shape fixity and recovery properties, as well as biocompatibility.
EUROPEAN POLYMER JOURNAL
(2021)
