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237 results on '"Zhu, Yabo"'

1. Bounded-Time Nonblocking Supervisory Control of Timed Discrete-Event Systems

Author

Zhang, Renyuan, Wu, Jiale, Gou, Junhua, Zhu, Yabo, and Cai, Kai

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

Recently an automaton property of quantitative nonblockingness was proposed in supervisory control of untimed discrete-event systems (DES), which quantifies the standard nonblocking property by capturing the practical requirement that all tasks be completed within a bounded number of steps. However, in practice tasks may be further required to be completed in specific time. To meet this new requirement, in this paper we introduce the concept of bounded-time nonblockingness, which extends the concept of quantitative nonblockingness from untimed DES to timed DES. This property requires that each task must be completed within a bounded time counted by the number of ticks, rather than bounded number of transition steps in quantitative nonblockingness. Accordingly, we formulate a new bounded-time nonblocking supervisory control problem (BTNSCP) of timed DES, and characterize its solvability in terms of a new concept of bounded-time language completability. Then we present an approach to compute the maximally permissive solution to the new BTNSCP., Comment: arXiv admin note: text overlap with arXiv:2108.00721

Published
2024

15. Time-Quantitatively Nonblocking Supervisory Control of Timed Discrete-Event Systems

Author

Zhang, Renyuan, Wu, Jiale, Gou, Junhua, Zhu, Yabo, Cai, Kai, Zhang, Renyuan, Wu, Jiale, Gou, Junhua, Zhu, Yabo, and Cai, Kai

Abstract

Recently we proposed an automaton property of quantitative nonblockingness in supervisory control of discrete-event systems, which quantifies the standard nonblocking property by capturing the practical requirement that all tasks be completed within a bounded number of steps. However, in practice tasks may be further required to be completed in specific time; this requirement cannot be fulfilled by the quantitatively nonblocking supervisor. To meet this new requirement, in this paper we introduce the concept of time-quantitative nonblockingness, which extends the concept of quantitative nonblockingness from untimed discrete-event systems (DES) to timed DES. This property requires that each task must be completed within a bounded time. Accordingly, we formulate a new time-quantitatively nonblocking supervisory control problem of TDES, and characterize its solvability in terms of a new concept of time-quantitative language completability. It is proved that there exists a unique supremal time-quantitatively completable sublanguage of a given language, and we develop an automaton-based algorithm to compute the supremal sublanguage. Finally, we present an approach to compute a maximally permissive supervisory control solution to the new time-quantitative nonblocking supervisory control problem., Comment: arXiv admin note: text overlap with arXiv:2108.00721

Published
2024

17. Softness‐Aided Mild Hyperthermia Boosts Stiff Nanomedicine by Regulating Tumor Mechanics.

Author

Li, Zheng, Zhu, Yabo, Zhang, Zhijie, Wang, Huimin, Wang, Chong, Xu, Chen, Li, Shiyou, Zhang, Shuya, Yang, Xiangliang, and Li, Zifu

Subjects
*FEVER, *INDOCYANINE green, *TUMOR microenvironment, *NANOGELS, *EXTRACELLULAR matrix, *NANOMEDICINE, *ERYTHROCYTE deformability
Abstract

Aberrant tumor mechanical microenvironment (TMME), featured with overactivated cancer‐associated fibroblasts (CAFs) and excessive extracellular matrix (ECM), severely restricts penetration and accumulation of cancer nanomedicines, while mild‐hyperthermia photothermal therapy (mild‐PTT) has been developed to modulate TMME. However, photothermal agents also encounter the barriers established by TMME, manifesting in limited penetration and heterogeneous distribution across tumor tissues and ending with attenuated efficiency in TMME regulation. Herein, it is leveraged indocyanine green (ICG)‐loaded soft nanogels with outstanding deformability, for efficient tumor penetration and uniform distribution, in combination with mild‐PTT to achieve potent TMME regulation by inhibiting CAFs and degrading ECM. As a result, doxorubicin (DOX)‐loaded stiff nanogels gain greater benefits in tumor penetration and antitumor efficacy than soft counterparts from softness‐mediated mild‐PTT. This study reveals the crucial role of nanomedicine mechanical properties in tumor distribution and provides a novel strategy for overcoming the barriers of solid tumors with soft deformable nanogels. [ABSTRACT FROM AUTHOR]

Published
2024
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18. The Bifunctional Electrocatalytic Performance of NiMoO4/BP Sheets for Overall Water Splitting and Its Promising High Stability.

Author

Hua, Chengye, Zhu, Yabo, Fan, Heliang, and Feng, Peizhong

Subjects
OXYGEN evolution reactions, HYDROGEN evolution reactions, NANOSTRUCTURED materials
Abstract

A good bifunctional electrocatalyst can effectively drive water splitting to produce hydrogen gas. In this paper, NiMoO4an nanomaterial was prepared and combined with black phosphorus (BP) in a one-step method. Used as a bifunctional electrocatalyst, the composite demonstrated outstanding electrochemical performance with 162.7 mV and 137.6 mV achieving current densities of 20 mA cm−2 and 10 mA cm−2 for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), respectively. For overall water splitting, the potential was just 1.55 V to achieve 10 mA cm−2, and, especially, the value only rises by0.05 V after 2000 cycles of CV. Here, the one-step synthesis method favors the dispersion of NiMoO4 nanomaterial on the BP surfaces, and facilitates a combination between the nickel molybdate and the BP. Also, the excellent performance of the samples should benefit from the synergistic action between the components. [ABSTRACT FROM AUTHOR]

Published
2024
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