bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultrawideband
Authors: Sun Hao , Yi Zao , Ma Can , Cheng Shubo , Tang Bin , Zeng Qingdong , Ahmad Sohail 
Published: April 2024

Abstract
The field of terahertz devices is important in terahertz technology. However, most of the current devices have limited functionality and poor performance. To improve device performance and achieve multifunctionality, we designed a terahertz device based on a combination of VO2 and metamaterials. This device can be tuned using the phase-transition characteristics of VO2, which is included in the triple-layer structure of the device, along with SiO2 and Au. The terahertz device exhibits various advantageous features, including broadband coverage, high absorption capability, dynamic tunability, simple structural design, polarization insensitivity, and incident-angle insensitivity. The simulation results showed that by controlling the temperature, the terahertz device achieved a thermal modulation range of spectral absorption from 0 to 0.99. At 313 K, the device exhibited complete reflection of terahertz waves. As the temperature increased, the absorption rate also increased. When the temperature reached 353 K, the device absorption rate exceeded 97.7% in the range of 5–8.55 THz. This study used the effective medium theory to elucidate the correlation between conductivity and temperature during the phase transition of VO2. Simultaneously, the variation in device performance was further elucidated by analyzing and depicting the intensity distribution of the electric field on the device surface at different temperatures. Furthermore, the impact of various structural parameters on device performance was examined, offering valuable insights and suggestions for selecting suitable parameter values in real-world applications. These characteristics render the device highly promising for applications in stealth technology, energy harvesting, modulation, and other related fields, thus showcasing its significant potential.
Bifurcation analysis and control study of improved full-speed differential model in connected vehicle environment
Authors: Ai 艾 Wen-Huan 文欢 , Lei 雷 Zheng-Qing 正清 , Li 李 Dan-Yang 丹洋 , Fang 方 Dong-Liang 栋梁 , Liu 刘 Da-Wei 大为 
Published: April 2024

Abstract
In recent years, the traffic congestion problem has become more and more serious, and the research on traffic system control has become a new hot spot. Studying the bifurcation characteristics of traffic flow systems and designing control schemes for unstable pivots can alleviate the traffic congestion problem from a new perspective. In this work, the full-speed differential model considering the vehicle network environment is improved in order to adjust the traffic flow from the perspective of bifurcation control, the existence conditions of Hopf bifurcation and saddle-node bifurcation in the model are proved theoretically, and the stability mutation point for the stability of the transportation system is found. For the unstable bifurcation point, a nonlinear system feedback controller is designed by using Chebyshev polynomial approximation and stochastic feedback control method. The advancement, postponement, and elimination of Hopf bifurcation are achieved without changing the system equilibrium point, and the mutation behavior of the transportation system is controlled so as to alleviate the traffic congestion. The changes in the stability of complex traffic systems are explained through the bifurcation analysis, which can better capture the characteristics of the traffic flow. By adjusting the control parameters in the feedback controllers, the influence of the boundary conditions on the stability of the traffic system is adequately described, and the effects of the unstable focuses and saddle points on the system are suppressed to slow down the traffic flow. In addition, the unstable bifurcation points can be eliminated and the Hopf bifurcation can be controlled to advance, delay, and disappear, so as to realize the control of the stability behavior of the traffic system, which can help to alleviate the traffic congestion and describe the actual traffic phenomena as well.
Improvement and security analysis of multi-ring discrete modulation continuous variable quantum secret sharing scheme
Authors: Jiang 姜 Huan-Yao 欢窈 , Nie 聂 Min 敏 , Yang 杨 Guang 光 , Sun 孙 Ai-Jing 爱晶 , Zhang 张 Mei-Ling 美玲 , Pei 裴 Chang-Xing 昌幸 
Published: April 2024

Abstract
In order to avoid the complexity of Gaussian modulation and the problem that the traditional point-to-point communication DM-CVQKD protocol cannot meet the demand for multi-user key sharing at the same time, we propose a multi-ring discrete modulation continuous variable quantum key sharing scheme (MR-DM-CVQSS). In this paper, we primarily compare single-ring and multi-ring M-symbol amplitude and phase-shift keying modulations. We analyze their asymptotic key rates against collective attacks and consider the security key rates under finite-size effects. Leveraging the characteristics of discrete modulation, we improve the quantum secret sharing scheme. Non-dealer participants only require simple phase shifters to complete quantum secret sharing. We also provide the general design of the MR-DM-CVQSS protocol. We conduct a comprehensive analysis of the improved protocol’s performance, confirming that the enhancement through multi-ring M-PSK allows for longer-distance quantum key distribution. Additionally, it reduces the deployment complexity of the system, thereby increasing the practical value.
Single event effects evaluation on convolution neural network in Xilinx 28 nm system on chip
Authors: Zhao 赵 Xu 旭 , Du 杜 Xuecheng 雪成 , Xiong 熊 Xu 旭 , Ma 马 Chao 超 , Yang 杨 Weitao 卫涛 , Zheng 郑 Bo 波 , Zhou 周 Chao 超 
Published: April 2024

Abstract
Convolutional neural networks (CNNs) exhibit excellent performance in the areas of image recognition and object detection, which can enhance the intelligence level of spacecraft. However, in aerospace, energetic particles, such as heavy ions, protons, and alpha particles, can induce single event effects (SEEs) that lead CNNs to malfunction and can significantly impact the reliability of a CNN system. In this paper, the MNIST CNN system was constructed based on a 28 nm system-on-chip (SoC), and then an alpha particle irradiation experiment and fault injection were applied to evaluate the SEE of the CNN system. Various types of soft errors in the CNN system have been detected, and the SEE cross sections have been calculated. Furthermore, the mechanisms behind some soft errors have been explained. This research will provide technical support for the design of radiation-resistant artificial intelligence chips.
Influence of temperature, stress, and grain size on behavior of nano-polycrystalline niobium
Authors: Yan 晏 Yu-Ping 玉平 , Zhang 张 Liu-Ting 柳亭 , zhang 张 Li-Pan 丽攀 , Lu 芦 Gang 刚 , Tu 涂 Zhi-Xin 志新 
Published: April 2024

Abstract
Atomic simulations are executed to investigate the creep responses of nano-polycrystalline (NC) niobium established by using the Voronoi algorithm. The effects of varying temperature, applied stress, and grain size (GS) on creep properties and mechanisms are investigated. Notably, the occurrence of tertiary creep is exclusively observed under conditions where the applied stress exceeds 4.5 GPa and the temperature is higher than 1100 K. This phenomenon can be attributed to the significant acceleration of grain boundary and lattice diffusion, driven by the elevated temperature and stress levels. It is found that the strain rate increases with both temperature and stress increasing. However, an interesting trend is observed in which the strain rate decreases as the grain size increases. The stress and temperature are crucial parameters governing the creep behavior. As these factors intensify, the creep mechanism undergoes a sequential transformation: initially from lattice diffusion under low stress and temperature conditions to a mixed mode combining grain boundaries (GBs) and lattice diffusion at moderate stress and mid temperature levels, and ultimately leading to the failure of power-law controlled creep behavior, inclusive of grain boundary recrystallization under high stress and temperature conditions. This comprehensive analysis provides in more detail an understanding of the intricate creep behavior of nano-polycrystalline niobium and its dependence on various physical parameters.
Opinion consensus incorporating higher-order interactions in individual-collective networks
Authors: Ye 叶 Shun 顺 , Tu 涂 Li-Lan 俐兰 , Wang 王 Xian-Jia 先甲 , Hu 胡 Jia 佳 , Wang 王 Yi-Chao 薏潮 
Published: April 2024

Abstract
In the current information society, the dissemination mechanisms and evolution laws of individual or collective opinions and their behaviors are the research hot topics in the field of opinion dynamics. First, in this paper, a two-layer network consisting of an individual-opinion layer and a collective-opinion layer is constructed, and a dissemination model of opinions incorporating higher-order interactions (i.e. OIHOI dissemination model) is proposed. Furthermore, the dynamic equations of opinion dissemination for both individuals and groups are presented. Using Lyapunov’s first method, two equilibrium points, including the negative consensus point and positive consensus point, and the dynamic equations obtained for opinion dissemination, are analyzed theoretically. In addition, for individual opinions and collective opinions, some conditions for reaching negative consensus and positive consensus as well as the theoretical expression for the dissemination threshold are put forward. Numerical simulations are carried to verify the feasibility and effectiveness of the proposed theoretical results, as well as the influence of the intra-structure, inter-connections, and higher-order interactions on the dissemination and evolution of individual opinions. The main results are as follows. (i) When the intra-structure of the collective-opinion layer meets certain characteristics, then a negative or positive consensus is easier to reach for individuals. (ii) Both negative consensus and positive consensus perform best in mixed type of inter-connections in the two-layer network. (iii) Higher-order interactions can quickly eliminate differences in individual opinions, thereby enabling individuals to reach consensus faster.
Multi-functional photonic spin Hall effect sensor controlled by phase transition
Authors: Cheng 程 Jie 杰 , Li 李 Rui-Zhao 瑞昭 , Cheng 程 Cheng 骋 , Zhang 张 Ya-Lin 亚林 , Liu 刘 Sheng-Li 胜利 , Dong 董 Peng 鹏 
Published: April 2024

Abstract
Photonic spin Hall effect (PSHE), as a novel physical effect in light–matter interaction, provides an effective metrological method for characterizing the tiny variation in refractive index (RI). In this work, we propose a multi-functional PSHE sensor based on VO2, a material that can reveal the phase transition behavior. By applying thermal control, the mutual transformation into different phase states of VO2 can be realized, which contributes to the flexible switching between multiple RI sensing tasks. When VO2 is insulating, the ultrasensitive detection of glucose concentrations in human blood is achieved. When VO2 is in a mixed phase, the structure can be designed to distinguish between the normal cells and cancer cells through no-label and real-time monitoring. When VO2 is metallic, the proposed PSHE sensor can act as an RI indicator for gas analytes. Compared with other multi-functional sensing devices with the complex structures, our design consists of only one analyte and two VO2 layers, which is very simple and elegant. Therefore, the proposed VO2-based PSHE sensor has outstanding advantages such as small size, high sensitivity, no-label, and real-time detection, providing a new approach for investigating tunable multi-functional sensors.
Effects of asymmetric coupling and boundary on the dynamic behaviors of a random nearest neighbor coupled system
Authors: Xu 徐 Ling 玲 , Jiang 姜 Lei 磊 
Published: April 2024

Abstract
This study investigates the dynamical behaviors of nearest neighbor asymmetric coupled systems in a confined space. First, the study derivative analytical stability and synchronization conditions for the asymmetrically coupled system in an unconfined space, which are then validated through numerical simulations. Simulation results show that asymmetric coupling has a significant impact on synchronization conditions. Moreover, it is observed that irrespective of whether the system is confined, an increase in coupling asymmetry leads to a hastened synchronization pace. Additionally, the study examines the effects of boundaries on the system’s collective behaviors via numerical experiments. The presence of boundaries ensures the system’s stability and synchronization, and reducing these boundaries can expedite the synchronization process and amplify its effects. Finally, the study reveals that the system’s output amplitude exhibits stochastic resonance as the confined boundary size increases.
A pressure-sensitive rheological origin of high friction angles of granular matter observed in NASA–MGM project
Authors: Cheng 程 Xiaohui 晓辉 , Xiao 肖 Shize 世泽 , Yang 杨 Sen 森 , Zhao 赵 Naifeng 乃峰 , Cao Alex Sixie 
Published: April 2024

Abstract
An abnormally high peak friction angle of Ottawa sand was observed in (National Aeronautics and Space Administration) NASA–(Mechanics of Granular Materials) MGM tests in microgravity conditions on the space shuttle. Previous investigations have been unsuccessful in providing a constitutive insight into this behavior of granular materials under extremely low effective stress conditions. Here, a recently proposed unified constitutive model for transient rheological behavior of sand and other granular materials is adopted for the analytical assessment of high peak friction angles. For the first time, this long-eluded behavior of sand is attributed to a hidden rheological transition mechanism, that is not only rate-sensitive, but also pressure-sensitive. The NASA–MGM microgravity conditions show that shear-tests of sand can be performed under abnormally low confining stress conditions. The pressure-sensitive behavior of granular shearing that is previously ignored is studied based on the μ(I) rheology and its variations. Comparisons between the model and the NASA microgravity tests demonstrate a high degree of agreement. The research is highly valid for pressure-sensitive and rate-dependent problems that occur during earthquakes, landslides, and space exploration.
Numerical simulation of early-age thermal stress of high volume fly ash (HVFA) concrete
Authors: Xin Jianda , Li Zhi , Zhang Guoxin , Liu Yi , Zhang Lei , Zhu Jingping , Liu Longlong , Rong Muning 
Published: April 2024

Abstract
This paper numerically studied the effect of fly ash (FA) replacement on early-age thermal stress of concrete. Different FA replacement levels (0%, 20%, 50% and 80%) on the thermal stress and cracking risk of concrete have been considered. Results showed that, due to the FA effect on the reduction of hydration heat, the maximum temperature and corresponding compressive stress during the temperature rise stage were both lowered; meanwhile, the strength of concrete was simultaneously weakened, leading to lower cracking stress when the FA replacement increased gradually. Finally, the cracking temperature of concrete decreased when the FA replacement level increased up to 50%, and converted to plateau with higher FA replacement level. Overall, FA replacement level with 50% was recommended for concrete under restraint cracking risk.
Numerical Study on the Efficiency of the Point Smoke Exhaust System in V-shaped Urban Underground Road Tunnel
Authors: Kang Siyan , Li Junmei , Qiao Yaxin , Qi Zhao , Lu Huimin , Ouyang Li 
Published: April 2024

Abstract
In order to study the exhaust effect of the point smoke exhaust system in V-shaped urban underground tunnel with different structures, effects of the slope differences on both sides of the slope changing point and the operating mode of the exhaust vent on the smoke spread distance, temperature at the height of 2 m above the road and the ceiling temperature were studied by the numerical method. The research results show that for the symmetric V-shaped tunnel, smoke can be controlled in the required range, but for asymmetric V-shaped tunnel with the slope difference on both sides, smoke cannot be easily controlled, ventilation supply is needed to improve the smoke exhaust efficiency. Point smoke exhaust system cannot effectively reduce the maximum temperature of the ceiling above the fire. When the fire source power is large, for the symmetrical V-shaped tunnel with a small slope, some fire prevention measures must be taken to protect the ceiling partition. For the asymmetric V-shaped tunnel, two exhaust vents opened on the small slope side and four opened on the large slope side are suggested for the occupant safe evacuation in tunnel.
Research on less temperature flawing resistance of steel residue asphalt composition based on SCB test
Authors: Wang Hongwei , Feng Xuemao , Liu Jiaqing , Wu Jianmin , Jiao Xiaodong , Shu Zhiqiang 
Published: April 2024

Abstract
In view of the increasing application of steel residue in asphalt pavement construction in China, in order to analyze the less temperature flawing resistance of steel residue asphalt composition, the less temperature semi-circular bending test (SCB) was used to analyze the less temperature flawing resistance of steel residue asphalt composition (SSAC-13) with various residue content based on the stress peak value and stress attenuation, rupture toughness, rupture energy and critical rupture energy density. The results show that the content of steel residue has a noticeable influence on the less temperature flawing resistance of steel residue asphalt composition. Considering the less temperature flawing resistance, the recommended steel residue content is 40%.
Effect of tempering on corrosion properties of mold steel
Authors: Cheng Xueming , Cheng Lei , Niu Ben , Qiu Yunjun , Zhu Guojian , Liu Chengzhe 
Published: April 2024

Abstract
There are many strongly developed karsts in South China, which bring great uncertainty to the construction stability of underground projects. This paper takes the deep foundation pit project of a station in a sandy soil area as the background, simulates the deep foundation pit excavation process based on finite element software, and comparatively analyzes the influence of the existence of karst holes on the foundation pit support structure. The results show that the effective treatment of solution holes in the process of foundation pit excavation can reduce the risk of surface settlement around the foundation pit but has less influence on the lateral displacement of the foundation pit support structure. The cavity grouting reinforcement technology is also introduced in detail in the paper, which can provide a reference for the reinforcement of deep foundation pit projects in sandy soil stratum containing strong development of large cavities.
Study on interpretation of Marine Geotechnical parameter based on static sounding
Authors: Zhang Ying , Di ShengJie , Zhou Heng , Mu Qingyi , Hu Xiangyang , Jing Liu 
Published: April 2024

Abstract
In recent years, the rapid rise of offshore wind power. Compared with other Marine exploration means and methods, pore pressure static penetration test is more economical, more efficient and more reliable. It has been widely used and is an indispensable exploration means in offshore wind power projects. Based on the survey results of the offshore windpower project in Guangdong in recent years, the applicability of using the pore pressure static sounding (CPTU) empirical formula to interpret various geotechnical parameters of offshore projects is analyzed in this paper, which can provide experience and reference for similar offshore projects.
Study on Improved Large Span Propping System for Reinforced Concrete Composite Slabs with Lattice Girders
Authors: Li Siyao , Li Liming , Shi Pengfei , Guo Zhipeng , Su Yanjiang , Li Yubo 
Published: April 2024

Abstract
To further improve the installation efficiency of commonly used reinforced concrete composite slabs with lattice girders in China, an Improved Large Span Propping System is proposed. This article investigates the mechanical properties of the new propping system through in-situ monitoring. The monitoring results show that the displacement and stress of the prefabricated layer can meet the requirements of current Chinese standards, which indicates the feasibility of the new support system. Compared with the original Large Span Propping System, the new propping system can further utilize the bending stiffness of the prefabricated layer and reduce the installation amount of the lower propping frame.
The Development of New Type GFRP Hollow Panels
Authors: Wei Yuxin , Wang Zhiping , Xiang Junzheng , Qiang Sheng 
Published: April 2024

Abstract
Under the background of global energy transformation, pumped storage power stations are becoming more and more important. Most of their water retaining structures adopt face rockfill dams, but their concrete panels will have many problems such as durability. In this study, a new type of GFRP hollow panel was developed for face rockfill dam. The nonlinear behavior and damage process of the material were simulated by finite element analysis and UMAT subroutine. Through analysis and comparison, it is found that the triangular section form is superior to other forms in terms of stress distribution and bearing capacity. After optimization design, the optimal section takes into account the stability, safety and economic benefits of the structure. The research results provide a high-performance panel solution with high construction efficiency and low maintenance cost for the face rockfill dam, and provide an important design reference for the application of GFRP composite materials in water conservancy projects in the future.
Impact Analysis of Section Seismic Capacity in Potential Plastic Hinge Zone of Engineered Cementitious Composite Based on OpenSees
Authors: Yuan Jiaquan , Jiang Weihong , Feng Luyang , Duan Wenhong , Li Huimei , Hu Guiling , Moulin  , Xu Weibing , Huang Xiaomin , Yang Kun 
Published: April 2024

Abstract
In this paper, OpenSees is used to analyze the moment-curvature (M-φ) curves of the bottom cross section of 4×40m continuous girder piers under the same reinforcing conditions, which are completely made of C40 concrete, partially made of Engineered Cementitious Composite material concrete(ECC) outsourced concrete, and completely made of ECC concrete, and then evaluate its seismic performance. Meanwhile, the yield curvature and ultimate curvature changes of the abutment section under different axial compression ratios are investigated. The results show that the yield curvature and ultimate curvature of ECC are larger than those of ordinary concrete, and the deformation capacity of ECC is stronger under the same axial force. The results also show that the yield moment and yield curvature of the section gradually increase with the increase of axial compression ratio, and the curvature ductility of the section deteriorates.