Search results for: Zheng‐Guang Wu

Items from 1 to 20 out of 116 results

article

$H_{\infty}$ optimal output tracking control for Markov jump systems: A reinforcement learning‐based approach

Ying Shen, Cai‐Kang Yao, Bo Chen, Wei‐Wei Che, more

International Journal of Robust and Nonlinear Control > 34 > 8 > 5149 - 5167

In this paper, the

H_{\infty}

optimal output tracking control problem for Markov jump systems is investigated, where the two cases with known or completely unknown transition probabilities are both considered. Based on game theory and

H_{\infty}

performance, quadratic cost is considered, where a discount parameter is introduced into the quadratic cost in order to track unstable...

article

Precise Regulation of Multiple Resonance Distribution Regions of a B,N‐Embedded Polycyclic Aromatic Hydrocarbon to Customize Its BT2020 Green Emission

Zheng‐Guang Wu, Yangyang Xin, Chaowu Lu, Weichun Huang, more

Angewandte Chemie International Edition > 63 > 7 > n/a - n/a

Recently, boron (B)/nitrogen (N)‐embedded polycyclic aromatic hydrocarbons (PAHs), characterized by multiple resonances (MR), have attracted significant attention owing to their remarkable features of efficient narrowband emissions with small full width at half maxima (FWHMs). However, developing ultra‐narrowband pure‐green emitters that comply with the Broadcast Service Television 2020 (BT2020) standard...

article

Precise Regulation of Multiple Resonance Distribution Regions of a B,N‐Embedded Polycyclic Aromatic Hydrocarbon to Customize Its BT2020 Green Emission

Zheng‐Guang Wu, Yangyang Xin, Chaowu Lu, Weichun Huang, more

Angewandte Chemie > 136 > 7 > n/a - n/a

article

Functional Graphdiyne for Emerging Applications: Recent Advances and Future Challenges

Mengke Wang, Junmei Pu, Yi Hu, You Zi, more

Advanced Functional Materials > 34 > 4 > n/a - n/a

Graphdiyne (GDY) is regarded as an exceptional candidate to meet the growing demand in many fields due to its rich chemical bonds, highly π‐conjugated structure, uniformly distributed pores, large surface area, and high inhomogeneity of charge distribution. The extensive research efforts bring about a rapid expansion of GDY with a variety of functionalities, which significantly enhance performance...

article

Finite‐time stochastic dissipative output tracking control of semi‐Markov jump systems via an adaptive event‐triggered mechanism

Ting Shi, Peng Shi, Zheng‐Guang Wu

International Journal of Robust and Nonlinear Control > 33 > 13 > 7774 - 7792

This work focuses on the output tracking control for a class of continuous‐time semi‐Markov jump systems (SMJSs). In the controller design, not only the finite‐time stochastic boundedness (FTSB), but also the dissipative performance over a finite‐time interval is considered. In order to save communication resources, a version of adaptive event‐triggered mechanism (AETM) is utilized. Different from...

article

Semitransparent Circularly Polarized Phosphorescent Organic Light‐Emitting Diodes with External Quantum Efficiency over 30% and Dissymmetry Factor Close to 10⁻²

Guangzhao Lu, Zheng‐Guang Wu, Ruixia Wu, Xiaosong Cao, more

Advanced Functional Materials > 31 > 36 > n/a - n/a

To concurrently realize large electroluminescence dissymmetry factor and high device efficiency remains a formidable challenge in the development of circularly polarized organic light‐emitting diode (CP‐OLED). In this work, by introducing a famous chiral resource of R‐camphor, two green chiral iridium(III) isomers of Λ/Δ‐Ir‐(R‐camphor) containing dual stereogenic centers at iridium and ancillary ligand,...

article

Event‐triggered output synchronization for nonhomogeneous agent systems with periodic denial‐of‐service attacks

Yong Xu, Mei Fang, Ya‐Jun Pan, Kaibo Shi, more

International Journal of Robust and Nonlinear Control > 31 > 6 > 1851 - 1865

This article presents a two‐layered framework to investigate the output synchronization problem in nonhomogeneous agent systems in the presence of periodic energy‐limited denial‐of‐service (DoS) attacks with an event‐triggered control strategy. Under the developed framework, the proposed controller for different agents is composed of a dynamic compensator and a regulator, where the dynamic compensator...

article

Visible‐Light‐Mediated Click Chemistry for Highly Regioselective Azide–Alkyne Cycloaddition by a Photoredox Electron‐Transfer Strategy

Zheng‐Guang Wu, Xiang‐Ji Liao, Li Yuan, Yi Wang, more

Chemistry – A European Journal > 26 > 25 > 5694 - 5700

Click chemistry focuses on the development of highly selective reactions using simple precursors for the exquisite synthesis of molecules. Undisputedly, the Cu^I‐catalyzed azide–alkyne cycloaddition (CuAAC) is one of the most valuable examples of click chemistry, but it suffers from some limitations as it requires additional reducing agents and ligands as well as cytotoxic copper. Here, we demonstrate...

article

Asynchronous H_∞ filtering of continuous‐time Markov jump systems

Mei Fang, Shanling Dong, Zheng‐Guang Wu

International Journal of Robust and Nonlinear Control > 30 > 2 > 685 - 698

The paper investigates the asynchronous H_∞ filtering design problem for continuous‐time linear systems with Markov jump. The hidden Markov jump principle is applied to represent the asynchronous situation between the target system and the designed filter. Via a Lyapunov technique, two sufficient conditions are developed to guarantee that the filtering error system is stochastically stable with a prescribed...

article

Organic Room‐Temperature Phosphorescence with Strong Circularly Polarized Luminescence Based on Paracyclophanes

Xiao Liang, Ting‐Ting Liu, Zhi‐Ping Yan, Yan Zhou, more

Angewandte Chemie International Edition > 58 > 48 > 17220 - 17225

Pure organic materials with intrinsic room‐temperature phosphorescence typically rely on heavy atoms or heteroatoms. Two different strategies towards constructing organic room‐temperature phosphorescence (RTP) species based upon the through‐space charge transfer (TSCT) unit of [2.2]paracyclophane (PCP) were demonstrated. Materials with bromine atoms, PCP‐BrCz and PPCP‐BrCz, exhibit RTP lifetime of...

article

Organic Room‐Temperature Phosphorescence with Strong Circularly Polarized Luminescence Based on Paracyclophanes

Xiao Liang, Ting‐Ting Liu, Zhi‐Ping Yan, Yan Zhou, more

Angewandte Chemie > 131 > 48 > 17380 - 17385

article

On pinning reachability of probabilistic Boolean control networks

Yang Liu, Jinde Cao, Liqing Wang, Zheng-Guang Wu

Science China Information Sciences > 2020 > 63 > 6 > 1-3

article

Chiral Octahydro‐Binaphthol Compound‐Based Thermally Activated Delayed Fluorescence Materials for Circularly Polarized Electroluminescence with Superior EQE of 32.6% and Extremely Low Efficiency Roll‐Off

Zheng‐Guang Wu, Hua‐Bo Han, Zhi‐Ping Yan, Xu‐Feng Luo, more

Advanced Materials > 31 > 28 > n/a - n/a

Circularly polarized organic light‐emitting diodes (CP‐OLEDs) are particularly favorable for the direct generation of CP light, and they demonstrate a promising application in 3D display. However, up to now, such CP devices have suffered from low brightness, insufficient efficiency, and serious efficiency roll‐off. In this study, a pair of octahydro‐binaphthol (OBN)‐based chiral emitting enantiomers,...

article

Configurationally Stable Platinahelicene Enantiomers for Efficient Circularly Polarized Phosphorescent Organic Light‐Emitting Diodes

Zhi‐Ping Yan, Xu‐Feng Luo, Wei‐Qiang Liu, Zheng‐Guang Wu, more

Chemistry – A European Journal > 25 > 22 > 5672 - 5676

Chiral materials with circularly polarized luminescence (CPL) are potentially applicable for 3D displays. In this study, by decorating the pyridinyl‐helicene ligands with ‐CF₃ and ‐F groups, the platinahelicene enantiomers featured superior configurational stability, as well as high sublimation yield (>90 %) and clear CPPL properties, with dissymmetry factors (|g_PL|) of approximately 3.7×10⁻³ in...

article

Rational design of phosphorescent iridium(III) complexes for emission color tunability and their applications in OLEDs

Tian-Yi Li, Jing Wu, Zheng-Guang Wu, You-Xuan Zheng, more

Coordination Chemistry Reviews > 2018 > 374 > C > 55-92

This review is an update on recent developments in emissive iridium(III) phosphorescent complexes and their applications in organic light-emitting diodes (OLEDs). The emphasis is focused on complexes with emission colors spanning the whole visible spectral region, which is extremely important for applications of OLEDs in display and white-light luminance. In each color section, materials are classified...

article

Filtering of two-dimensional periodic Roesser systems subject to dissipativity

Jie Tao, Zheng-Guang Wu, Yuanqing Wu

Information Sciences > 2018 > 460-461 > C > 364-373

In this note, the problem of dissipativity-based filtering of two-dimensional (2D) periodic Roesser systems is investigated. A discrete-time periodic Roesser model extensively used in practical systems is introduced to describe 2D periodic systems. Moreover, it is assumed that the periods of the augmented system in horizontal and vertical directions are the same, which can greatly simplify stability...

article

Peripheral Amplification of Multi‐Resonance Induced Thermally Activated Delayed Fluorescence for Highly Efficient OLEDs

Xiao Liang, Zhi‐Ping Yan, Hua‐Bo Han, Zheng‐Guang Wu, more

Angewandte Chemie International Edition > 57 > 35 > 11316 - 11320

Multi‐resonance induced by boron and nitrogen atoms in opposite resonance positions endows a thermally activated delayed fluorescence (MR‐TADF) emitter with a strikingly small full width at half maximum of only 26 nm and excellent photoluminescence quantum yield of up to 97.48 %. The introduction of a carbazole unit in the para position of the B‐substituted phenyl‐ring can significantly boost up the...

article

Peripheral Amplification of Multi‐Resonance Induced Thermally Activated Delayed Fluorescence for Highly Efficient OLEDs

Xiao Liang, Zhi‐Ping Yan, Hua‐Bo Han, Zheng‐Guang Wu, more

Angewandte Chemie > 130 > 35 > 11486 - 11490

article

Filtering for Discrete-Time Switched Fuzzy Systems With Quantization

Shanling Dong, Hongye Su, Peng Shi, Renquan Lu, more

IEEE Transactions on Fuzzy Systems > 2017 > 25 > 6 > 1616 - 1628

The paper is concerned with the

$H_\infty$

and

$l_2$

–

$l_\infty$

filtering design problems for discrete-time nonlinear switched systems with quantized measurements using the Takagi–Sugeno (T–S) fuzzy model. The systems under consideration inherently combine features of the switched hybrid systems and the T–S fuzzy systems. The sector bound approach is employed to deal with quantization effects. Based...

article

Estimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost

Hong Lin, Hongye Su, Peng Shi, Renquan Lu, more

IEEE Transactions on Cybernetics > 2017 > 47 > 12 > 4074 - 4085

In this paper, we study the state estimation and optimal control [i.e., linear quadratic Gaussian (LQG) control] problems for networked control systems in which control inputs, observations, and packet acknowledgments (ACKs) are randomly lost. The packet ACK is a signal that is transmitted from the actuator to notice the estimator the occurence of control packet loss. For such systems, we obtain the...

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INFONA - science communication portal

Search results for: Zheng‐Guang Wu

$H_{\infty}$ optimal output tracking control for Markov jump systems: A reinforcement learning‐based approach

Precise Regulation of Multiple Resonance Distribution Regions of a B,N‐Embedded Polycyclic Aromatic Hydrocarbon to Customize Its BT2020 Green Emission

Precise Regulation of Multiple Resonance Distribution Regions of a B,N‐Embedded Polycyclic Aromatic Hydrocarbon to Customize Its BT2020 Green Emission

Functional Graphdiyne for Emerging Applications: Recent Advances and Future Challenges

Finite‐time stochastic dissipative output tracking control of semi‐Markov jump systems via an adaptive event‐triggered mechanism

Semitransparent Circularly Polarized Phosphorescent Organic Light‐Emitting Diodes with External Quantum Efficiency over 30% and Dissymmetry Factor Close to 10⁻²

Event‐triggered output synchronization for nonhomogeneous agent systems with periodic denial‐of‐service attacks

Visible‐Light‐Mediated Click Chemistry for Highly Regioselective Azide–Alkyne Cycloaddition by a Photoredox Electron‐Transfer Strategy

Asynchronous H_∞ filtering of continuous‐time Markov jump systems

Organic Room‐Temperature Phosphorescence with Strong Circularly Polarized Luminescence Based on Paracyclophanes

Organic Room‐Temperature Phosphorescence with Strong Circularly Polarized Luminescence Based on Paracyclophanes

On pinning reachability of probabilistic Boolean control networks

Chiral Octahydro‐Binaphthol Compound‐Based Thermally Activated Delayed Fluorescence Materials for Circularly Polarized Electroluminescence with Superior EQE of 32.6% and Extremely Low Efficiency Roll‐Off

Configurationally Stable Platinahelicene Enantiomers for Efficient Circularly Polarized Phosphorescent Organic Light‐Emitting Diodes

Rational design of phosphorescent iridium(III) complexes for emission color tunability and their applications in OLEDs

Filtering of two-dimensional periodic Roesser systems subject to dissipativity

Peripheral Amplification of Multi‐Resonance Induced Thermally Activated Delayed Fluorescence for Highly Efficient OLEDs

Peripheral Amplification of Multi‐Resonance Induced Thermally Activated Delayed Fluorescence for Highly Efficient OLEDs

Filtering for Discrete-Time Switched Fuzzy Systems With Quantization

Estimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost

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