arXiv subjects

Haozhe Yi

Publications and source records attributed to Haozhe Yi.

5 recordsLinked to original sources

arXiv2026

DTMC-Based Analysis and Scheduling for Periodic Flows with Proactive HARQ

Ultra-Reliable Low-Latency Communication (URLLC) requires strict reliability and latency guarantees for heterogeneous periodic traffic. Proactive HARQ improves resource efficiency through early termination, but slot-level timing effects, particularly delayed feedback, complicate schedulability analysis. This paper presents a discrete-time Markov chain (DTMC)-based framework for periodic flows with proactive HARQ. By expanding the state space, the model captures HARQ round-trip time and other cross-slot timing effects. The framework determines the transmission opportunities required to satisfy heterogeneous reliability and latency constraints and supports offset-based scheduling through a two-stage genetic algorithm. Simulations with industrial URLLC traffic show that the proposed method achieves higher schedulability than reactive HARQ, K-Repetition, and non-guaranteed proactive HARQ, with acceptable computational overhead.

cs.NI↗

arXiv2024

Improved Convolution-Based Analysis for Worst-Case Probability Response Time of CAN

Controller Area Networks (CANs) are widely adopted in real-time automotive control and are increasingly standard in factory automation. Considering their critical application in safety-critical systems, The error rate of the system must be accurately predicted and guaranteed. Through simulation, it is possible to obtain a low-precision overview of the system's behavior. However, for low-probability events, the required number of samples in simulation increases rapidly, making it difficult to conduct a sufficient number of simulations in practical applications, and the statistical results may deviate from the actual outcomes. Therefore, a formal analysis is needed to evaluate the error rate of the system. This paper improves the worst-case probability response time analysis by using convolution-based busy-window and backlog techniques under the error retransmission protocol of CANs. Empirical analysis shows that the proposed method improves upon existing methods in terms of accuracy and efficiency.

eess.SY↗

arXiv2020

Algae-Filler Artificial Timber with an Ultralow Binder Content

Algae cultivation is an active area of study for carbon sequestration, while the large amount of produced algae must be upcycled. In the current study, we fabricated artificial timber based on algae filler, with only 2~4% epoxy binder. The flexural strength could be comparable with those of softwoods. The binder was efficiently dispersed in the algae phase through diluent-aided compaction self-assembly. The important processing parameters included the binder content, the filler morphology, the compaction pressure, the diluent ratio, and the curing condition. This research not only is critical to carbon sequestration, but also helps reduce the consumption of conventional construction materials.

physics.app-ph↗

arXiv2020

Sand-Filler Structural Material with Low Content of Polyethylene Binder

Currently, most of the waste plastics cannot be recycled, causing serious environmental concerns. In this research, we investigated a compaction formation technology to fabricate structural materials with thermoplastic binders. When the compaction pressure was 70~100 MPa, with only ~10 wt% polyethylene binder, the flexural strength was greater than that of typical steel-reinforced concrete, suitable to many construction applications. Because construction materials are tolerant to impurities, our work may provide a promising opportunity to recycle waste plastics and to reduce the portland cement production.

physics.app-ph↗

arXiv2020

Compaction Self-Assembly of Ultralow-Binder-Content Thermoplastic Composites Based on Lunar Soil Simulant

In a recent study, we developed ultralow-binder-content (UBC) structural materials based on lunar soil simulant and thermoset binders. In the current research, we investigated thermoplastic binders. Compared to thermosets, advanced thermoplastics could be more UV resistant, more durable, more robust, and recyclable. Our main technology is the compaction self-assembly (CSA). By using only ~4 wt% polyetherketoneketone (PEKK) binder, the thermoplastic-binder UBC composite was stronger than typical steel-reinforced concrete. The CSA operation was separate from the curing process. This study may provide an important in-situ resource utilization method for large-scale construction on Moon.

physics.app-ph↗