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Adaptive H∞control of polynomial Hamiltonian systems via symbolic computation:controller parameterisation

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Journal of Control and Decision 2020年第2期7卷 160-177页

作者： Zhong Cao Xiaorong hou wenjing Zhao School of Physics and Electronic Engineering Guangzhou UniversityGuangzhou510006People’s Republic of China Mathematical Educational Software of Engineering Technology Research Center of Guangdong Province Guangzhou510006People’s Republic of China School of Automation Engineering University of Electronic Science and Technology of ChinaChengduPeople’s Republic of China Lab Center Guangzhou UniversityGuangzhouPeople’s Republic of China

This paper deals with controller parameterisation method of adaptive H∞control for polynomial Hamiltonian systems(PHSs)with disturbances and unknown parameters.We design a simplified controller with a set of tuning parameters which can guarantee that the systems are adaptive H∞stable by using Hamiltonian function method.Then,a method for solving the set of tuning parameters of the controller with symbolic computation is presented.The proposed parameterisation method avoids solving Hamilton–Jacobi–Issacs(HJI)equations and the obtained controller is easier as compared to some existing ones.Simulation example shows that the controller is effective as it can optimise adaptive H∞control by adjusting tuning parameters.All these results are expected to be of use in the study of adaptive H∞control for nonlinear systems with disturbances and unknown parameters.

关键词： Symbolic computation polynomial Hamiltonian systems(PHSs) tuning parameters adaptive H∞control

Detecting Dynamics of Hot Topics with Alluvial Diagrams:A Timeline Visualization

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Journal of Data and Information Science 2017年第3期2卷 37-48页

作者： wenjing Ruan Haiyan hou Zhigang Hu WISE Lab Dalian University of Technology

Purpose： In this paper, we combined the method of co-word analysis and alluvial diagram to detect hot topics and illustrate their dynamics. Design/methodology/approach： Articles in the field of scientometrics were chosen as research cases in this study. A time-sliced co-word network was generated and then clustered. Afterwards, we generated an alluvial diagram to show dynamic changes of hot topics, including their merges and splits over time. Findings： After analyzing the dynamic changes in the field of scientometrics from 2011 to 2015, we found that two clusters being merged did not mean that the old topics had disappeared and a totally new one had emerged. The topics were possibly still active the following year, but the newer topics had drawn more attention. The changes of hot topics reflected the shift in researchers＇ interests. subdivided and re-merged. For example, several topics as research progressed. Research topics in scientometrics were constantly a cluster involving ＂industry＂ was divided into Research limitations： When examining longer time periods, we encounter the problem of dealing with bigger data sets. Analyzing data year by year would be tedious, but if we combine, e.g. two years into one time slice, important details would be missed. Practical implications： This method can be applied to any research field to illustrate the dynamics of hot topics. It can indicate the promising directions for researchers and provide guidance to decision makers. Originality/value： The use of alluvial diagrams is a distinctive and meaningful approach to detecting hot topics and especially to illustrating their dynamics.

关键词： Dynamics Alluvial diagram Hot topics Timeline approach

Aliphatic biomarker signatures of early Oligocene-early Miocene source rocks in the central Qiongdongnan Basin:Source analyses of organic matter

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Acta Oceanologica Sinica 2023年第3期42卷 1-18页

作者： Min Xu Dujie hou Xiong Cheng Jun Gan Xinde Xu Gang Liang wenjing Ding School of Energy Resources China University of GeosciencesBeijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry of EducationBeijing 100083China Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering Beijing 100083China Exploration and Development Resource Institute Hainan Branch of China National Offshore Oil CorporationHainan 570300China China National Offshore Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China

The geochemical signatures of fifty-four rock samples and three supplementary drill stem test(DST)oils from the Yacheng-Sanya formations in the central Qiongdongnan Basin(CQB)were analysed.Reconstruction of the early Oligocene-early Miocene(36–16 Ma)palaeovegetation and source analyses of organic matter(OM)were conducted using aliphatic biomarkers in ancient sediments and DST oils.Both the interpreted aquatic and terrigenous OM contributed to the CQB source rocks(SRs)but had varying relative proportions.The four distribution patterns derived from n-alkanes,terpanes,and steranes are representative of four OM composition models of the Yacheng-Sanya SRs,including model A,model B,model C,and model D,which were classified based on the increasing contribution from terrigenous OM relative to aquatic OM.Some terrigenous higher plantderived biomarkers,including oleanane,des-A-oleanane,C_(29)ααα20R sterane,bicadinanes,the C_(19)/(C_(19)+C_(23))tricyclic terpane ratio,and other n-alkane-derived ratios suggest that angiosperms had increased proportions in the palaeoflora from early Oligocene to early Miocene,and the bloom of terrigenous higher plants was observed during deposition of upper Lingshui Formation to lower Sanya Formation.These findings are consistent with the incremental total organic carbon and free hydrocarbons+potential hydrocarbons(S_1+S_2)in the lower Lingshuilower Sanya strata with a significant enrichment of OM in the E_3l_1-N_1s_2 shales.The maturity-and environmentsensitive aliphatic parameters of the CQB SRs and DST oils suggest that all the samples have predominantly reached their early oil-generation windows but have not exceeded the peak oil windows,except for some immature Sanya Formation shales.In addition,most of the OM in the analysed samples was characterised by mixed OM contributions under anoxic to sub-anoxic conditions.Furthermore,terrestrial-dominant SRs were interpreted to have developed mainly in the Lingshui-Sanya formations and were deposited in sub-oxic to oxic environments,compared to

关键词： aliphatic biomarkers early Oligocene-early Miocene organic matter sources palaeovegetation reconstruction Qiongdongnan Basin

Online pharmaceutical process analysis of Chinese medicine using a miniature mass spectrometer: Extraction of active ingredients as an example

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Journal of Pharmaceutical Analysis 2023年第5期13卷 535-543页

作者： Wangmin Hu Junling hou wenjing Liu Xuan Gu Yulei Yang Hongcai Shang Mei Zhang School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing102488China Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing Dongzhimen HospitalBeijing University of Chinese MedicineBeijing100700China Huayi Pharmaceutical Co. Ltd.Beijing102600China

The automation of traditional Chinese medicine(TCM)pharmaceuticals has driven the development of process analysis from offline to online.Most of common online process analytical technologies are based on spectroscopy,making the identification and quantification of specific ingredients still a challenge.Herein,we developed a quality control(QC)system for monitoring TCM pharmaceuticals based on paper spray ionization miniature mass spectrometry(mini-MS).It enabled real-time online qualitative and quantitative detection of target ingredients in herbal extracts using mini-MS without chromatographic separation for the first time.Dynamic changes of alkaloids in Aconiti Lateralis Radix Praeparata(Fuzi)during decoction were used as examples,and the scientific principle of Fuzi compatibility was also investigated.Finally,the system was verified to work stably at the hourly level for pilot-scale extraction.This mini-MS based online analytical system is expected to be further developed for QC applications in a wider range of pharmaceutical processes.

关键词： Process analytical technology TCM Pharmaceuticals Miniature mass spectrometry Online analysis

Biomarkers reveal the terrigenous organic matter enrichment in the late Oligocene-early Miocene marine shales in the Ying-Qiong Basin,South China Sea

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Acta Oceanologica Sinica 2023年第3期42卷 31-53页

作者： wenjing Ding Youchuan Li Lan Lei Li Li Shuchun Yang Yongcai Yang Dujie hou China National Offshors Oil Corporation(CNOOC)Research Institute Co. Ltd.Beijing 100028China School of Natural Sciences Macquarie UniversitySydney 2109Australia School of Energy Resources China University of GeosciencesBeijing 100083China CNOOC International Limited Beijing 100028China

The increase of total organic carbon content of the late Oligocene-early Miocene terrigenously-dominated marine shales in the shallower depth intervals was reported in the Ying-Qiong Basin,South China Sea.The organic enriched lower Sanya Formation shales(early Miocene)have biomarker characteristics of tropical/subtropical plants,with abundant high molecular weight n-alkanes,angiosperm-derived oleanane,rearranged oleananesⅠ,Ⅱ,Ⅱ,tricyclic/tetracyclic terpanes including des-A-oleanane,X,*,Y,Z,Z1 and bicadinanes W,T,T1,R.The biomarker characteristics are suggestive of larger influx of the dominant tropical/subtropical angiosperms in flora under a warming and more humid climate during depositions of the lower Sanya Formation(early Miocene)than the older Lingshui Formation(late Oligocene).The tropical/subtropical angiosperm input was thought as the prime control of terrigenous organic matter enrichment relative to the redox condition,and the coeval sea level changes and seafloor spreading in the South China Sea.Enrichment of the terrigenous organic matter in the early Miocene shales is likely in association with the coeval peak East Asian summer monsoon intensity in the South China Sea.

关键词： total organic carbon higher plant-derived biomarkers tropical/subtropical plants East Asian monsoonal climate

Highly efficient and low hysteresis MA-free perovskite solar cells based on multifunctional oteracil potassium interface modification

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Highly efficient and low hysteresis MA-free perovskite solar...

Printed thin film transistors with 10^(8)on/off ratios and photoelectrical synergistic characteristics using isoindigo-based polymers-enriched(9,8)carbon nanotubes

第九届新型太阳能材料科学与技术学术研讨会

作者： Huan Bi Qing Shen Gaoyi Han Wenjing Hou The University of Electro-Communications Shanxi University

Bulk and interface defects are the culprits of power conversion efficiency(PCE) loss of the perovskite solar cell(PSC)[1,2]. Meanwhile, notorious hysteresis is also an obstacle on the road of PSC’s commercialization process. Herein, we report a multifunctional buffer molecule(oteracil potassium, OP) for suppressing hysteresis and passivating defect in stable and efficient methylammonium-free PSC[3]. Experimental and theoretical results prove that multi-functional OP has strong chemical interaction with SnO2 and the perovskite layer. It can not only reduce the oxygen vacancy defects in SnO2 film, but also passivate the under coordinated Pb2+ in perovskite. At the same time, it can significantly inhibit hysteresis. Due to these beneficial effects, the PCE of the OP modified device is over 22%, and the unencapsulated modified device exhibits more excellent humidity stability. This work provides guidance for the development of multifunctional modified molecules for high PCE, stable, and non-hysteresis PSC.

关键词： methylammonium-free perovskite solar cell interface engineer low hysteresis multifunctional modifier oteracil potassium

来源： cnki会议评论

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Nano Research 2022年第6期15卷 5517-5526页

作者： wenjing Xu Min Li Masayoshi Tange Liqiang Li Juncai hou Jun Ye Li Wei Yuan Chen Jianwen Zhao School of Materials Science and Engineering Shaanxi University of TechnologyHanzhong 723001China Division of Nanodevices and Related Nanomaterials Printable Electronics Research CentreSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesNo.398 Ruoshui RoadSEIDSuzhou Industrial ParkSuzhou 215123China School of Nano Technology and Nano Bionics University of Science and Technology of ChinaHefei 230026China National and Local Joint Engineering Laboratory for Slag Comprehensive Utilization and Environmental Technology Shaanxi University of TechnologyHanzhong 723001China Nanomaterials Research Institute National Institute of Advanced Industrial Science and Technology(AIST)Tsukuba 3058565Japan Advanced Materials Division Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesNo.398 Ruoshui RoadSEIDSuzhou Industrial ParkSuzhou 215123China Institute of High Performance Computing Agency for ScienceTechnology and ResearchSingapore 138632Singapore School of Chemical and Biomolecular Engineering The University of SydneyCamperdownNSW 2006Australia

Monochiral single-walled carbon nanotubes(SWCNTs)can enable high-performance carbon-based electronic devices and integrated circuits.However,their fabrication often requires complex SWCNT purification and enrichment.Herein,we showed that isoindigo-based polymer derivatives(PDPPIID and PFIID)directly enriched(9,8)nanotubes from as-synthesized SWCNT powders selectively and efficiently to yield high concentration(9,8)nanotube inks.The selective wrapping mechanism was elucidated by classical full-atomistic molecular dynamic(MD)simulations.Thin-film transistors(TFTs)were fabricated by depositing the SWCNT ink into device channels using aerosol jet printing.TFT performance was strongly influenced by polymer residues,the deposition condition(humidity),and ink concentration.Optimized TFTs showed excellent device-to-device uniformity with 108 on/off ratios.Further,optoelectronic transistors were fabricated,and their photoelectrical neuromorphic characteristics,storage,memory,and logic functions were characterized under the pulsed light and voltage stimulations,demonstrating excellent application potentials.

关键词： monochiral carbon nanotube polymer wrapping printed thin-film transistor photoelectrical synergistic molecular dynamic simulation

Clinical practice of emergency department-initiated extracorporeal cardiopulmonary resuscitation for cardiac arrest in adults

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Chinese Medical Journal 2023年第2期136卷 224-226页

作者： Guowu Xu Jinxiang Wang wenjing Zhou Heng Jin Yanfen Chai Haojun Fan Shike hou Ziquan Liu Yanqing Liu Science and Innovation Center Wenzhou Safety(Emergency)InstituteTianjin UniversityWenzhouZhejiang 325000China Department of Emergency Medicine Tianjin Medical University General HospitalTianjin 300052China Department of Pediatric Dentistry Stomatological Hospital of Tianjin Medical UniversityTianjin 300070China Institute of Disaster and Emergency Medicine Tianjin UniversityTianjin 300072China

To the Editor:Cardiac arrest(CA)is one of the leading causes of adult death globally.According to the latest American Heart Association reports,[1]the incidences of Emergency Medical Service-assessed adult out-of-hosp... 详细信息

关键词： cardiac assessed resuscitation

游戏型教育模式在文物价值传播中的应用探究--以“云游长城”小程序为例

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艺术科技 2023年第23期36卷 139-141页

作者：侯文静贵州大学历史与民族文化学院贵州贵阳550025

目的:随着互联网技术的发展,文物价值的传播不再局限于实地参观和简易的图文介绍,数字化技术、互动性展示、功能性游戏等逐渐成为传播的新手段。由于游戏本身的休闲属性,所以基于游戏进行的文物价值传播日益受到关注。文章旨在通过“云... 详细信息

目的:随着互联网技术的发展,文物价值的传播不再局限于实地参观和简易的图文介绍,数字化技术、互动性展示、功能性游戏等逐渐成为传播的新手段。由于游戏本身的休闲属性,所以基于游戏进行的文物价值传播日益受到关注。文章旨在通过“云游长城”小程序这一代表性案例,研究游戏型教育模式在文物价值传播中的实际应用及效果。方法:文章通过分析典型案例,论述游戏型教育模式在“云游长城”小程序研发中的概况以及在文物价值传播中的实际应用。结果:游戏型教育模式在公众教育中起着至关重要的作用,游戏强烈的吸引力为文物价值传播提供了动能。基于此,文章针对“云游长城”小程序这一案例进行总结分析,以探讨游戏型教育模式在文物价值传播中的可行性。结论:“云游长城”小程序运用了较多新兴数字技术,追求沉浸式体验,让参与者以第一人称视角进行游戏。整体设计通过高精度仿真还原、贴合场景的背景音乐、各种拓展知识的补充等,帮助参与者了解长城及其背后的文化知识。与此同时,叙事性结构的搭建、交互性互动的反馈、激励性游戏机制的引入等,是前沿科技和数字技术在文物价值传播中实现创新应用的标志性范例。

关键词：游戏型教育模式文物价值传播 “云游长城”小程序