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Peng Nong,Yue Pan,Qinpeng Dong,Dafu Zeng,Mingzhao Xu,Xiang Wang,Jiaming Wang,Lian Deng,Xiuli Chen,Huanfu Zhou 대한금속·재료학회 2024 ELECTRONIC MATERIALS LETTERS Vol.20 No.1
NaNbO 3 -based lead-free ceramics are gaining widespread interest in recent years due to their environmental friendlinessand low density, which can meet the needs of future advanced pulse power electronics for low cost, miniaturization andintegration. However, a reversible phase transition of FE-AFE at room temperature for pure NaNbO 3 ceramic will producea large residual polarization, resulting in a low energy storage capacity. In this work, the ternary system (1- x )(0.92NaNbO 3 -0.08Bi(M g0.5 Ti 0.5 )O 3 )- x CaTiO 3 was designed by introducing the linear material CaTiO 3 doped into (0.92NaNbO 3 -0.08Bi(Mg 0.5 Ti 0.5 )O 3 ) ceramics to enhance the disorder of A/B sites in the system. The introduce of CaTiO 3 could optimizethe relaxation characteristics of the ceramics, refi ne the grain size to improve the breakdown fi eld strength( E b ), which enhancethe energy storage properties to W rec = 5.71 J/cm 3 and η = 85.7% at 475 kV/cm. Additionally, the 0.8(0.92NN-0.08BMT)-0.2CT ceramic achieves both temperature (20–160 °C) and frequency (5 Hz -120 Hz) stability, while also obtains excellentcharge/discharge performance( C D = 607.22 A/cm 2 , P D = 48.58 MW/cm 3 , t 0.9 = 28 ns), which indicates the great potentialapplication in pulsed power capacities.
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Wu, Wenhao,Zhang, Xiaoning,Pan, Jiaming,Zhou, Yihui 한국통신학회 2023 Journal of communications and networks Vol.25 No.6
Recently, time-sensitive services have expanded from traditional industrial control systems to more scenarios. Some time-sensitive applications, such as remote surgery, autonomous driving, Augmented Reality (AR), etc., require deterministic end-to-end delay and jitter in data transmission. Deterministic Network (DetNet) is proposed as a promising technology for providing deterministic service in Wide Area Networks (WAN). DetNet guarantees deterministic end-to-end delay and jitter by specifying a certain routing path and transmission time-slots for time-sensitive flows. However, how to efficiently steer time-sensitive flows while jointly allocating transmission time-slots is still an open problem. Existing flow scheduling algorithms are limited in the scenarios of Local Area Networks (LAN), and do not consider the impact of propagation delay in large-scale networks. To this end, we study the joint optimization of time-slot allocation and traffic steering, while considering the propagation delay of WAN links. Our objective is to maximize the number of successfully deployed time-sensitive flows under the constraints of required end-to-end delay. Accordingly, we formulate the studied problem as an Integer Linear Programming (ILP) model. Since it is proved to be an NP-hard problem, we design a heuristic algorithm named Genetic-based Deterministic Network Traffic Scheduling (GDNTS). The solution with the largest number of deployed time-sensitive flows can be obtained from the evolution of chromosomes in GDNTS. Compared with the benchmark algorithms, extensive simulation results show that GDNTS improves the deployed time sensitive flows number by 22.85% in average.
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