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Hybrid Adaptive Event‑Triggered Platoon Control with Package Dropout

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Automotive Innovation 2022年第4期5卷 347-358页

作者： Jiawei Wang Fangwu Ma Liang Wu Guanpu wu The State Key Laboratory of Automotive Simulation and Control Jilin University5988 Renmin StreetChangchun 130022China

A novel hybrid adaptive event-triggered platoon control strategy is proposed to achieve the balanced coordination between communication resource utilization and vehicle-following performance considering the effect of package dropout.To deal with the disturbance caused by the event-triggered scheme,the parameter space approach is adopted to derive the feasible region from which cooperative adaptive cruise control controller satisfies internal stability,distance accuracy,and string stability.Subsequently,the Bernoulli random distribution process is employed to depict the phenomenon of package drop-out,and the hybrid coefficient is proposed to realize the allocation between the adaptive trigger threshold strategy and the adaptive headway strategy.The simulation of a six-vehicle platoon is carried out to verify the effectiveness of the designed control strategy.Results show that about 78.76%of communication resources have been saved by applying the event-triggered scheme,while guaranteeing the desired vehicle-following performance.And in the non-ideal communication environment with frequent package dropouts,the hybrid adaptive strategy achieves the coordination among communication resource utilization,string stability margin,distance accuracy,and traffic efficiency.

关键词： Cooperative adaptive cruise control Event-triggered scheme Hybrid adaptive strategy Package dropout Parameter space approach

Gravidynamics,spinodynamics and electrodynamics within the framework of gravitational quantum field theory

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Science China(Physics,Mechanics & Astronomy) 2023年第6期66卷 148-190页

作者： Yue-Liang Wu International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of SciencesBeijing 100190China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China Taiji Laboratory for Gravitational Wave Universe(Beijing/Hangzhou) University of Chinese Academy of SciencesBejing 100049China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou310024China

By noticing the fact that the charged leptons and quarks in the standard model are chirality-based Dirac spinors since their weak interaction violates maximally parity symmetry though they behave as Dirac fermions in electromagnetic interaction,we show that such a chirality-based Dirac spinor possesses not only electric charge gauge symmetry U(1)but also inhomogeneous spin gauge symmetry WS(1,3)=SP(1,3)?W1,3,which reveals the nature of gravity and spacetime.The gravitational force and spin gauge force are governed by the gauge symmetries W1,3and SP(1,3),respectively,and a biframe spacetime with globally fiat Minkowski spacetime as base spacetime and locally fiat gravigauge spacetime as a fiber is described by the gravigauge field through emergent non-commutative geometry.The gauge-geometry duality and renormalizability in gravitational quantum field theory(GQFT)are carefully discussed.A detailed analysis and systematic investigation on gravidynamics and spinodynamics as well as electrodynamics are carried out within the framework of GQFT.A full discussion on the generalized Dirac equation and Maxwell equation as well as Einstein equation and spin gauge equation is made in biframe spacetime.New effects of gravidynamics as extension of general relativity are particularly analyzed.All dynamic equations of basic fields are demonstrated to preserve the spin gauge covariance and general coordinate covariance due to the spin gauge symmetry and emergent general linear group symmetry GL(1,3,R),so they hold naturally in any spinning reference frame and motional reference frame.

关键词： inhomogeneous spin gauge symmetry locally flat gravigauge spacetime gravitational relativistic quantum mechanics with generalized Dirac equation gravidynamics with generalized Einstein equation generalized Maxwell equation in any motional and spinning reference frame

Research on Credit Default Swaps Pricing Considering Moral Hazard Incentive under Reduce-Form Model

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Journal of Systems Science and Systems Engineering 2024年第3期33卷 311-329页

作者： Liang Wu Kangjie He Zhe Guo School of Mathematical Science Henan Institute of Science and TechnologyXinxiang453003China Public Front Office Department Industrial and Commercial Bank of ChinaZhengzhou450000China

Equilibrium pricing of credit default swaps(CDS)promotes efficient identification of credit risk in the market,which in turn leads to efficient allocation of resources.However,even when CDS have been priced in equilibrium,i.e.,when premiums are equal to anticipated payments,the moral hazard incentives of CDS buyers increase with CDS transactions.Consequentially,it becomes an interesting research direction to study the impact of moral hazard incentives on the trading mechanism or pricing of derivatives(CDS).Most of the existing literature on the impact of moral hazard incentives in CDS pricing on derivatives trading mechanisms takes a macro perspective and focuses on the agreement risk effect.The literature exploring the analysis of the impact of moral hazard on the probability of agreement default from a micro perspective is not yet available.With this in mind,this paper focuses on the mechanisms by which“fraud”,an extreme manifestation of micro-moral hazard incentives,affects the probability of default.This paper introduces for the first time the concept of“claiming fraud”by credit protection buyers,which is different from the macro perspective of moral hazard incentives,and thus defines a specific extreme form of moral hazard incentives.Meanwhile,to address the intrinsic feature of the lack of economic explanatory power of the reduce-form model,this paper introduces a moral hazard incentive factor into the reduce-form model,and proposes a moral hazard state variable as a function of the asset value of the reference entity,which gives the reduce-form model strong economic explanatory power,and the default predictability is reduced by the description of the reduce-form model.In terms of the object of study,this paper considers the issue of moral hazard incentives in the presence of claiming fraud in two reference entities to further explore the impact of moral hazard incentives on default protection at the micro level in terms of cyclic default.Finally,based on the analysis of the results of the numerical simulat

关键词： Financial engineering moral hazard incentive claiming fraud reduce-form model probability of default calculation CDS pricing

An all-silicon design of a high-efficiency broadband transmissive terahertz polarization convertor

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Frontiers of Optoelectronics 2023年第4期16卷 91-99页

作者： Xiaohua Xing Die Zou Xin Ding Jianquan Yao Liang Wu College of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronics Information and Technology(Ministry of Education)Tianjin UniversityTianjin 300072China

Polarization,a fundamental behavior of electromagnetic waves,holds immense potential across diverse domains such as environmental monitoring,biomedicine,and ocean exploration.However,achieving efcient modulation of terahertz waves with wide operational bandwidth poses signifcant challenges.Here,we introduce an all-silicon polarization converter designed specifcally to operate in the terahertz range of the electromagnetic spectrum.Simulation results demonstrate that the average conversion efciency of cross-linear waves exceeds 80%across a wide frequency range spanning from 1.00 to 2.32 THz,with the highest conversion efciency peaking at an impressive 99.97%.Additionally,our proposed structure facilitates linear-to-circular polarization conversion with an ellipticity of 1 at 0.85 THz.Furthermore,by rotating the crossshaped microstructure,active control over arbitrary polarization states can be achieved.To summarize,the proposed structure ofers remarkable fexibility and ease of integration,providing a reliable and practical solution for achieving broadband and efcient polarization conversion of terahertz waves.

关键词： Broadband High efficiency Polarization conversion All-silicon

Blockade of the deubiquitinating enzyme USP48 degrades oncogenic HMGA2 and inhibits colorectal cancer invasion and metastasis

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Acta Pharmaceutica Sinica B 2024年第4期14卷 1624-1643页

作者： Can Cheng Hanhui Yao Heng Li Jingwen Liu Zhengyi Liu Yang wu liang Zhu Hejie Hu Zhengdong Fang Liang Wu Department of General Surgery the First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery the First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Department of Comprehensive Surgery Anhui Provincial Cancer HospitalWest District of the First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Anhui Provincial Hospital Health Management Center the First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001China Department of Breast Surgery Henan Provincial People's HospitalPeople's Hospital of Zhengzhou UniversityPeople's Hospital of Henan UniversityZhengzhou 450003China

HMGA2,a pivotal transcription factor,functions as a versatile regulator implicated in the progression of diverse aggressive malignancies.In this study,mass spectrometry was employed to identify ubiquitin-specific proteases that potentially interact with HMGA2,and USP48 was identified as a deubiquitinating enzyme of HMGA2.The enforced expression of USP48 significantly increased HMGA2 protein levels by inhibiting its degradation,while the deprivation of USP48 promoted HMGA2 degradation,thereby suppressing tumor invasion and metastasis.We discovered that USP48 undergoes SUMOylation at lysine 258,which enhances its binding affinity to HMGA2.Through subsequent phenotypic screening of small molecules,we identified DUB-IN-2 as a remarkably potent pharmacological inhibitor of USP48.Interestingly,the small-molecule inhibitor targeting USP48 induces destabilization of HMGA2.Clinically,upregulation of USP48 or HMGA2 in cancerous tissues is indicative of poor prognosis for patients with colorectal cancer(CRC).Collectively,our study not only elucidates the regulatory mechanism of DUBs involved in HMGA2 stability and validates USP48 as a potential therapeutic target for CRC,but also identifies DUB-IN-2 as a potent inhibitor of USP48 and a promising candidate for CRC treatment.

关键词： Colorectal cancer Invasion and metastasis Post-translational modification Ubiquitination SUMOylation USP48 HMGA2 Specific inhibitors

“怀情不尽曰隐”——沈约天监初之崇佛与梁武帝之关系

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许昌学院学报 2023年第1期42卷 22-30页

作者：何良五湖北大学文学院湖北武汉430062

沈约天监初年重拾佛教信仰,其实是为了迎合梁武帝推尊佛教的策略。天监六年群臣对《神灭论》进行围剿,是武帝公开以政治权力为后盾,提高佛教地位的行为。尚书令沈约作为朝臣之首,在武帝弘佛过程中扮演着重要角色。《究竟慈悲论》《六道... 详细信息

沈约天监初年重拾佛教信仰,其实是为了迎合梁武帝推尊佛教的策略。天监六年群臣对《神灭论》进行围剿,是武帝公开以政治权力为后盾,提高佛教地位的行为。尚书令沈约作为朝臣之首,在武帝弘佛过程中扮演着重要角色。《究竟慈悲论》《六道相续作佛义》等佛教论文与梁武帝对佛义的理解极为相似。另外,沈约晚年的忏悔、舍身、千僧会、八关斋等行为,皆直接或间接受意于武帝。然而沈约对佛教的信仰具有很大的投机成分,诚心不足,是以在临终前露出破绽,激化了其与武帝之间的矛盾。沈约天监年间的崇佛行为及其遭遇,须结合梁武帝方能看得分明,亦可借此观察梁代士人的宗教信仰及其所处的政治实态。

关键词：沈约梁武帝佛教天监

Enthalpy-change driven synthesis of high-entropy perovskite nanoparticles

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Nano Research 2022年第6期15卷 4867-4872页

作者： Siyang Nie Liang Wu Lingci Zhao Pengfei Zhang School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Due to their diverse and tunable composition,distorted lattice and excellent stability,high-entropy ceramics(HECs)hold great promise for catalysis,especially when they present as nanoparticles(NPs).However,current HECs are typically limited to bulky materials with none or fewer defects,because high synthetic temperature(e.g.,1,000–1,200°C)is usually required to highlight the entropic contribution(TΔS)inΔG=ΔH−TΔS.Being different with previous strategies,a negative Gibbs free energy for HECs crystallization is obtained by dramatically decreasing the mixing enthalpy(ΔH).Guided by this principle,single-phase highentropy La(Ni_(0.2)Mn_(0.2)Cu_(0.2)Fe_(0.2)Co_(0.2))O_(3−δ)perovskite(HE-LMO)NPs were prepared at a relatively low temperature(≤500°C).Interestingly,abundant oxygen vacancies were directly created within HE-LMO NPs,which exhibited good activity in catalytic oxidation.Meanwhile,the high-entropy structure endows as-made HE-LMO with robust stability even with 5 vol.%water in feeding gas.Density functional theory(DFT)calculations revealed that the defective sites in HE-LMO NPs facilitated the charge transfer from HE-LMO to CO,thus activating the adsorbed CO gas.The current work may inspire future design and synthesis of HECs NPs.

关键词： enthalpy-change high-entropy ceramics mechanochemical synthesis perovskite CO oxidation

LncRNAs are cool regulators in cold exposure in plants

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Science China(Life Sciences) 2019年第7期62卷 978-981页

作者： Pingchuan Deng Liang Wu College of Agriculture and Biotechnology Zhejiang University

Transcriptomic studies in last two decades showed that more than 70% eukaryotic genomes are transcribed.Those transcripts over 200 nucleotides in length without a coding ability,called long non-coding RNAs (lncRNAs),a... 详细信息

关键词： Transcriptomic decades RNAs

Extraction of Stress Intensity Factors by Using the P-Version Finite Element Method and Contour Integral Method

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Acta Mechanica Solida Sinica 2020年第6期33卷 836-850页

作者： Jianming Zhang Jun Chen Liang Wu Department of Engineering Mechanics Kunming University of Science and TechnologyKunming 650500China Department of Water Resources and Hydropower Engineering Kunming University of Science and TechnologyKunming 650500China

The stress intensity factors(SIFs)for two-dimensional cracks are extracted using the p-version finite element method(P-FEM)and the contour integral method.Several numerical experiments,e.g.,crack initiating from the edge of a circular hole under an unidirectional uniform tension and two equal-length,unequal-length hole-edge cracks,respectively,at a rectangular plate,an inclined centered crack under uniaxial tension at a square plate and a pipeline crack model,are used to demonstrate the accuracy and effectiveness of the approaches.SIFs are presented for the effects of various crack lengths and length-width ratio.Numerical results are analyzed and compared with reference solutions and results obtained by the Voronoi cell finite element method,boundary element method,high-order extended finite element method(high-order XFEM)and commercial finite element software ABAQUS in the available literature.Numerical results are in good agreement with the benchmark problems and show faster convergence rate,higher accuracy and better numerical stability.

关键词： Fracture mechanics Stress intensity factors P-version finite element method Contour integral method