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Adaptive neural network based boundary control of a flexible marine riser system with output constraints

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Frontiers of Information Technology & Electronic Engineering 2022年第8期23卷 1229-1238页

作者： Chuyang YU Xuyang LOU Yifei MA Qian Ye Jinqi ZHANG Key Laboratory of Advanced Process Control for Light Industry(Ministry of Education) Jiangnan UniversityWuxi 214122China College of Internet of Things Technology Wuxi Institute of TechnologyWuxi 214122China Wuxi Good Cloud IoT Technology Co. Ltd.Wuxi 214196China

In this study,we develop an adaptive neural network based boundary control method for a flexible marine riser system with unknown nonlinear disturbances and output constraints to suppress vibrations.We begin with describing the dynamic behavior of the riser system using a distributed parameter system with partial differential equations.To compensate for the effect of nonlinear disturbances,we construct a neural network based boundary controller using a radial basis neural network to reduce vibrations.Under the proposed boundary controller,the state of the riser is guaranteed to be uniformly bounded based on the Lyapunov method.The proposed methodology provides a way to integrate neural networks into boundary control for other flexible robotic manipulator systems.Finally,numerical simulations are given to demonstrate the effectiveness of the proposed control method.

关键词： Marine riser system Partial differential equation Neural network Output constraint Boundary control Unknown disturbance

Disaster Risk Reduction,Climate Change Adaptation and Their Linkages with Sustainable Development over the Past 30 years:AReview

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International Journal of Disaster Risk Science 2023年第1期14卷 1-13页

作者： Jiahong Wen Chengcheng Wan Qian Ye Jianping Yan Weijiang Li School of Environment and Geographical Sciences Shanghai Normal UniversityShanghai200234China Integrated Risk Governance Project Beijing100875China Rodel Risk Solutions Inc. TorontoONM1W1J3Canada

The severe damage and impacts caused by extreme events in a changing climate will not only make the sustainable development goals difficult to achieve,but also erode the hard-won development gains of the past.This article reviews the major impacts and challenges of disaster and climate change risks on sustainable development,and summarizes the courses and linkages of disaster risk reduction(DRR),climate change adaptation(CCA),and sustainable development over the past 30 years.Our findings show that the conceptual development of DRR actions has gone through three general phases:disaster management in the 1990s,risk management in the 2000s,and resilient management and development in the 2010s.Gradually,CCA has been widely implemented to overcome the adverse effects of climate change.A framework is proposed for tackling climate change and disaster risks in the context of resilient,sustainable development,indicating that CCA is not a subset of DRR while they have similarities and differences in their scope and emphasis.It is crucial to transform governance mechanisms at different levels,so as to integrate CCA and DRR to reduce disaster and climate change risks,and achieve safe growth and a resilient future in the era of the Anthropocene.

关键词： Climate change adaptation Disaster risk reduction Resilience Sustainable development goals United Nations

Nonlinear Fractional-Order Dynamic Stability of Fluid-Conveying Pipes Constituted by the Viscoelastic Materials with Time-Dependent Velocity

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Acta Mechanica Solida Sinica 2022年第5期35卷 733-745页

作者： ye Tang Guo Wang qian Ding School of Mechanical Engineering Anhui Polytechnic UniversityWuhu241000China Department of Mechanics Tianjin UniversityTianjin300350China

Considering that the fluid-conveying pipes made of fractional-order viscoelastic material such as polymeric materials with pulsatile flow are widely applied in engineering,we focus on the stability and bifurcation behaviors in parametric resonance of a viscoelastic pipe resting on an elastic foundation.The Riemann–Liouville fractional-order constitutive equation is used to accurately describe the viscoelastic property.Based on this,the nonlinear governing equations are established according to the Euler–Bernoulli beam theory and von Karman’s nonlinearity,with using the generalized Hamilton’s principle.The stability boundaries and steady-state responses undergoing parametric excitations are determined with the aid of the direct multiple-scale method.Some numerical examples are carried out to show the effects of fractional order and viscoelastic coefficient on the stability region and nonlinear bifurcation behaviors.It is noticeable that the fractional-order viscoelastic property can effectively reconstruct the dynamic behaviors,indicating that the stability of the pipes can be conspicuously enhanced by designing and tuning the fractional order of viscoelastic materials.

关键词： Pipes conveying fluid Fractional-order viscoelastic damping Parametric vibration Stability Bifurcation

Preclinical and clinical trials of oncolytic vaccinia virus in cancer immunotherapy:a comprehensive review

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Cancer Biology & Medicine 2023年第9期20卷 646-661页

作者： Mengyuan Li Minghuan Zhang Qian Ye Yunhua Liu Wenbin qian Department of Hematology the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China Hangzhou Rong-Gu Biotechnology Limited Company Hangzhou 310056China Department of Pathology&Pathophysiology and Department of Surgical Oncology of the Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310058China

Oncolytic virotherapy has emerged as a promising treatment for human cancers owing to an ability to elicit curative effects via systemic administration.Tumor cells often create an unfavorable immunosuppressive microenvironment that degrade viral structures and impede viral replication;however,recent studies have established that viruses altered via genetic modifications can serve as effective oncolytic agents to combat hostile tumor environments.Specifically,oncolytic vaccinia virus(OVV)has gained popularity owing to its safety,potential for systemic delivery,and large gene insertion capacity.This review highlights current research on the use of engineered mutated viruses and gene-armed OVVs to reverse the tumor microenvironment and enhance antitumor activity in vitro and in vivo,and provides an overview of ongoing clinical trials and combination therapies.In addition,we discuss the potential benefits and drawbacks of OVV as a cancer therapy,and explore different perspectives in this field.

关键词： Oncolytic virotherapy oncolytic vaccinia virus engineered virus arming strategy

Effect of medical care linkage-continuous management mode in patients with posterior circulation cerebral infarction undergoing endovascular interventional therapy

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World Journal of Clinical Cases 2022年第29期10卷 10478-10486页

作者： Fen-Xia Zhu Qian Ye Department of Interventional Medicine The First Affiliated Hospital of Soochow UniversitySuzhou 215006Jiangsu ProvinceChina

BACKGROUND Acute cerebral infarction is a severe type of ischemic stroke that can be divided into anterior circulation cerebral infarction and posterior circulation cerebral infarction(PCCI).PCCI affects the structure of the posterior circulation brain,because posterior part of the brain,which has more complex anatomical structures and more prone to posterior circulation vascular variation.Therefore,improving the prognosis of PCCI patients is necessary.AIM To explore the effect of medical care linkage-continuous management mode(MCLMM)on endovascular interventional therapy(EIT)for PCCI.METHODS Sixty-nine patients with PCCI who received EIT and conventional nursing intervention were selected as the control group,and 78 patients with PCCI who received EIT and MCLMM intervention were selected as the observation group.The incidence of postoperative complications,compliance and disease selfmanagement behavior after six months of intervention,modified Rankin scale(mRS)and Barthel index(BI)scores in the acute phase and after one year of intervention,and recurrence within one year were compared between the two groups.RESULTS The total incidence rate of postoperative complications in the observation group(7.69%)was lower than that in the control group(18.84%)(Pyear of intervention,in the observation group,the mRS score was significantly lower,and the BI score was significantly higher than those in the control group(Pyear in the observation group(3.85%)was significantly lower than that in the control group(13.04%)(P<0.05).CONCLUSION MCLMM can reduce the incidence of complications after EIT for PCCI,improve patient compliance behavior and disease self-management ability,and promote the recovery o

关键词： Medical care linkage-continuous management mode Posterior circulation cerebral infarction Cerebral infarction Medical care Interventional therapy

Mainstreaming the Full ENSO:Linking Present Weather and Future Climate

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International Journal of Disaster Risk Science 2022年第6期13卷 829-841页

作者： Michael H.Glantz Lino Naranjo-Diaz Qian Ye Gregory E.Pierce Consortium for Capacity Building(CCB) University of Colorado BoulderBoulderCO 80301USA Integrated Risk Governance Program Beijing Normal UniversityBeijing 100875China

In this article we propose that all countries that are striving to become a Weather-Ready Nation(WRN)would beneft greatly from including El Niño-Southern Oscillation(ENSO)-related research findings into their decision-making processes,not only when an El Niño or a La Niña forecast has been issued quasi-periodically.For an aspiring WRN,to beneft from ENSO information,such as disruptive or benefcial changes that could be foreseeably expected to occur in seasonal fow and in sub-seasonal hydrometeorological anomalies,requires its continuous mainstreaming about the status of the ENSO process into a WRN’s decision-making activities.The ENSO process provides a bridge between sub-seasonal weather anomalies and a sub-decadal climate phenomenon as well as a bridge between coping with weather extremes today and preparing for climate change-related hydrometeorological hazards in the future.ENSO extremes every few years provide a chance to evaluate a nation’s strategic and tactical responses to hydrometeorological hazard forecasts and disasters.Each successive ENSO extreme and its Neutral phase tests previously designed best practices.Involvement of today’s youth and young professionals on climate,water,and weather issues has been increasing and will do so in coming decades.Shifting awareness and attention to ENSO and away from ENSO extremes is crucial.The heightened urgency for understanding the full ENSO“cycle”especially by youth and young professionals today is because they will soon be in professional positions that enable them to advise decision makers about climate policy issues.Their understanding of the ENSO cycle is critically needed,as global warming is expected to continue to increase for the rest of the twentyfrst century.

关键词： ENSO WRN Hydromet Climate change Young professionals

An Updated Review of Event Attribution Approaches

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Journal of Meteorological Research 2022年第2期36卷 227-238页

作者： Cheng qian Yangbo ye Yang CHEN Panmao ZHAI Key Laboratory of Regional Climate–Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 University of Chinese Academy of Science Beijing 100049 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081

There have been considerable high-impact extreme events occurring around the world in the context of climate change.Event attribution studies,which seek to quantitatively answer whether and to what extent anthropogenic climate change has altered the characteristics-predominantly the probability and magnitude-of particular events,have been gaining increasing interest within the research community.This paper reviews the latest approaches used in event attribution studies through a new classification into three major categories according to how the event attribution question is framed-namely,the risk-based approach,the storyline approach,and the combined approach.Four approaches in the risk-based framing category and three in the storyline framing category are also reviewed in detail.The advantages and disadvantages of each approach are discussed.Particular attention is paid to the ability,suitability,and applicability of these approaches in attributing extreme events in China,a typical monsoonal region where climate models may not perform well.Most of these approaches are applicable in China,and some are more suitable for analyzing temperature events.There is no right or wrong among these approaches,but different approaches have different framings.The uncertainties in attribution results come from several aspects,including different categories of framing,different conditions in climate model approaches,different models,different definitions of the event,and different observational data used.Clarification of these aspects can help to understand the differences in attribution results from different studies.

关键词： event attribution extreme events anthropogenic climate change risk-based approach storyline approach combined approach

A dimensional analysis on asphalt binder fracture and fatigue cracking

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Frontiers of Structural and Civil Engineering 2018年第2期12卷 201-206页

作者： qian ZHAO Zhoujing ye National Center for Materials Service Safety University of Science and Technology Beijing Beijing 100083 China

在沥青文件夹裂开的骨折和疲劳是为人行道工程师的二个很严重的问题。在这份报纸，我们在场的一条新全面途径，基于经典破裂力学用 Buckingham 定理和 J 积分分析由维的分析两个都组成，在沥青上评估破裂和疲劳文件夹。维的分析能提供... 详细信息

在沥青文件夹裂开的骨折和疲劳是为人行道工程师的二个很严重的问题。在这份报纸，我们在场的一条新全面途径，基于经典破裂力学用 Buckingham 定理和 J 积分分析由维的分析两个都组成，在沥青上评估破裂和疲劳文件夹。维的分析能提供一个新观点分析沥青破裂和疲劳裂开机制，这被发现。

关键词：文件夹疲劳沥青骨折破裂力学积分分析工程师人行道

Exhaust emission inventory of typical construction machinery and its contribution to atmospheric pollutants in Chengdu, China

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Journal of Environmental Sciences 2023年第3期125卷 761-773页

作者： Wubo Fan Wenju Jiang Junhui Chen Fumo Yang Jun qian Hong ye Institute of New Energy and Low-Carbon Technology Sichuan University(Wangjiang Campus)Chengdu 610207China Sichuan Academy of Environmental Sciences Chengdu 610041China Tsinghua University Beijing 100084China

To study the emission characteristics of typical construction machinery in Chengdu,12 construction machinery (excavators,bulldozers,loaders,and forklifts) under idling mode,moving mode,and working mode,were tested using a portable emission measurement system(PEMS).Under three operating modes,the typical construction machinery in the working mode was higher in the fuel-based average emission factors of PM_(2.5)and NOx,while the fuel-based average emission factors of HC and CO were higher in idling mode.Integrated the results of investigation on ownership and activity levels of construction machinery,an exhaust emission inventory of typical construction machinery of Chengdu in 2018 was established according to the recommendation method.The annual emission of PM_(2.5),NOx,HC,and CO were 1.67×106,1.61×108,3.83×106,and 1.26×107kg,respectively,and the excavator contributed the maximum emissions,accounting for an average proportion of 43.95%.The emission of construction machinery in Chengdu exhibited a clear monthly trend,with the highest from April to October and the lowest from November to March.In addition,the exhaust emissions presented an obvious spot-like characteristics,and the high-value areas were mainly concentrated in the surrounding suburban counties such as Shuangliu Wenjiang etc.To reduce pollution from construction machinery and improve the quality of the atmospheric environment,more effective measures on housing construction and municipal construction should be taken in those districts in Chengdu.

关键词： Construction equipment PEMS Emission factor Emission inventory Contribution Chengdu