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非整数阶系统的频率辨识

控制理论与应用 2008年第3期25卷 517-520页

作者：林军 POINOT Thierry 李寿涛 TRIGEASSOU jean-claude 吉林大学通信工程学院吉林长春130022 普瓦捷高等工程师学院自动化和工业计算机实验室法国普瓦捷86022

使用频响数据对非整数阶系统作频域模拟和辨识.首先,定义了非整数阶微分器的频率特性,进而给出了非整数阶系统的奈奎斯特曲线的绘制方法.然后,运用方程式误差的辅助变量法,根据实部和虚部频率数据进行非整数阶系统的频率辨识.最后,通过... 详细信息

使用频响数据对非整数阶系统作频域模拟和辨识.首先,定义了非整数阶微分器的频率特性,进而给出了非整数阶系统的奈奎斯特曲线的绘制方法.然后,运用方程式误差的辅助变量法,根据实部和虚部频率数据进行非整数阶系统的频率辨识.最后,通过两个数字仿真来验证这种辨识方法.

关键词：非整数阶系统模拟辅助变量法频率辨识

Lighting up aggregate emission of perylene diimide by leveraging polymerization-mediated through-space charge transfer and π-π stacking

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Science China Chemistry 2024年

作者： Suiying Ye Désirée Füglistaller Tian Tian Anjay Manian Sudhir Kumar Celine Nardo Andrew J.Christofferson Salvy P.Russo Chih-Jen Shih jean-Christophe Leroux Yinyin Bao Institute of Pharmaceutical Sciences Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 3 Institute for Chemical and Bioengineering Department of Chemistry and Applied Biosciences ETH Zurich Vladimir-Prelog-Weg 1-5 ARC Centre of Excellence in Exciton Science School of Science RMIT University School of Science STEM College RMIT University

The molecular engineering of fluorescent organic/polymeric materials, specifically those emitting in the deep red to near-infrared spectrum, is vital for advancements in optoelectronics and biomedicine. Perylene diimide(PDI), a well-known fluorescent scaffold, offers high thermal and photophysical stability but suffers from fluorescence quenching in solid or aggregate states due to intense π-π interactions. To mitigate this, simple and versatile methods for strong PDI aggregate emission without extensive synthetic demands are highly desirable but still lacking. Here, we report a straightforward strategy to enhance the solid-state emission of PDI by introducing certain degree of through-space charge transfer(TSCT) via controlled radical polymerization,which can efficiently distort the typical face-to-face PDI stacking, enabling greatly enhanced deep red emission. This is achieved by growing electron-donating star-shape styrenic(co)polymers from a multidirectional electron-accepting PDI initiator. The incorporation of polycyclic aromatic monomers further shifted the emission into the near-infrared region, albeit with a reduced intensity. Overall, the emission of the PDI-based TSCT polymers can be systematically manipulated by leveraging the balance between PDI stacking and the TSCT degree, as confirmed by both experimental study and theoretical calculations. Our approach circumvents complex synthetic procedures, offering highly emissive materials with large Stokes shifts and showing broad potential for optoelectronic technology.

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High-resolution observations of prominence plume formation with the new vacuum solar telescope

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Research in Astronomy and Astrophysics 2021年第9期21卷 91-100页

作者： Jian-Chao Xue jean-claude Vial Yang Su Hui Li Zhi Xu Ying-Na Su Tuan-Hui Zhou Zhen-Tong Li Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China Institut d'strophysique Spatiale CNRS/UniversitéParis-SudUniversitéParis-SaclayBâtiment 12191405 Orsay CedexFrance Yunnan Observatories Chinese Academy of SciencesKunming 650216China

Prominence plumes are evacuated upflows that emerge from bubbles below prominences,whose formation mechanism is still *** we present a detailed study of plumes in a quiescent prominence using the high-resolution Hαfiltergrams at the line center as well as line wing at±0.4 A from the New Vacuum Solar *** of brightening,blue shifts,and turbulence at the fronts of plumes are found during their *** large plumes split at their heads and finger-shaped structures are formed between ***-shifted flows along the bubble-prominence interface are found before and during the plume *** observations are consistent with the hypothesis that prominence plumes are related to coupled Kelvin-Helmholtz and Rayleigh-Taylor(KH/RT)*** splittings and fingers are evidence of RT instability,and the flows may increase the growth rate of KH/RT ***,the significant turbulence at plume fronts may suggest that the RT instability is triggered by the plumes penetrating into the *** this scenario,extra mechanisms are necessary to drive the plumes.

关键词： instabilities methods:data analysis Sun:filaments,prominences

以创新为使命和路径:高等教育发展新趋势——对话欧洲教育与社会政策研究所所长让-克洛德·鲁阿诺-博巴兰教授

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世界教育信息 2024年第10期37卷 3-8页

作者：让-克洛德·鲁阿诺-博巴兰张力玮徐艳茹马宁法国国立工艺学院欧洲教育与社会政策研究所巴黎75010 教育部教育管理信息中心北京100816 中国科学院大学公共政策与管理学院北京100190 首都师范大学实验小学北京100044

进入21世纪以来,各国对高等教育的治理呈现新公共管理模式的特征。在内外部因素影响下,创新成为高等教育机构新的目标,以及主导机构行动的价值追求。在高等教育系统的演变和进化过程中,新型高等教育机构得以建立,而传统高等教育机构不... 详细信息

进入21世纪以来,各国对高等教育的治理呈现新公共管理模式的特征。在内外部因素影响下,创新成为高等教育机构新的目标,以及主导机构行动的价值追求。在高等教育系统的演变和进化过程中,新型高等教育机构得以建立,而传统高等教育机构不断转型发展。在此过程中,高等教育机构重点推进解决真实问题的、基于项目的学习,多学科的、融合设计思维的教学创新得到越来越多的应用。在各国对高等教育加强治理、高等教育机构发展演变、合作网络化和多层次化的背景下,尽管处于经费缩减、国际竞争、新的使命等多重压力和挑战下,高等教育机构仍然保持其作为学术机构的组织惯性和特性。

关键词：高等教育创新知识生产合作网络教学创新

Hepatitis C virus genotypes distribution and transmission risk factors in Luxembourg from 1991 to 2006

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World Journal of Gastroenterology 2008年第8期14卷 1237-1243页

作者： Francois Roman Karin Hawotte Daniel Struck Anne-Marie Ternes jean-Yves Servais Vic Arendt Patrick Hoffman Robert Hemmer Thérèse Staub Carole Seguin-Devaux jean-claude Schmit Retrovirology Laboratory CRP-Santé 84 rue Val fleuri L-1526 Luxembourg Centre Hospitalier de Luxembourg 4 rue Barblé L-1210 Luxembourg Centre Pénitentiaire de Luxembourg UmKuelebierg L-5299 Schrassig Luxembourg Retrovirology Laboratory CRP-Santé 84 rue Val fleuri L-1526 Luxembourg Centre Hospitalier de Luxembourg 4 rue Barblé L-1210 Luxembourg

AIM： To analyze the Hepatitis C virus （HCV） genotype distribution and transmission risk factors in a population of unselected patients in Luxembourg.METHODS： Epidemiological information （gender, age and transmission risks） were collected from 802 patients newly diagnosed for hepatitis C and living in Luxembourg, among whom 228 patients referred from prison. Genotyping using 5＇noncoding （5＇NC） sequencing was performed. We compared categorical data using the Fisher＇s exact F-test and odds ratios （OR） were calculated for evaluating association of HCV genotype and risk factors.RESULTS： The sex ratio was predominantly male （2.2） and individuals aged less than 40 years represented 49.6% of the population. Genotype 1 was predominant （53.4%） followed by genotype 3 （33%）. Among risk factors, intravenous drug usage （IVDU） was the most frequently reported （71.4%） followed by medical-related transmission （17.6%） including haemophilia, transfusion recipients and other nosocomial reasons. Genotype 3 was significantly associated to IVDU （OR = 4.84, P 〈 0.0001） whereas genotype 1 was significantly associated with a medical procedure （OR = 2.42, P 〈 0.001）. The HCV genotype distribution from inmate patients differed significantly from the rest of the population （Chi-square test with four degrees of freedom, P 〈 0.0001） with a higher frequency of genotype 3 （46.5% vs 27.5%） and a lower frequency of genotype 1 and 4 （44.7% vs 56.8% and 5.3% vs 9.6%, respectively）. IVDU was nearly exclusively reported as a risk factor in prison.CONCLUSION： We report the first description of the HCV genotype distribution in Luxembourg. The repartition is similar to other European counties, with one of the highest European prevalence rates of genotype 3 （33%）. Since serology screening became available in 2992, IVDU remains the most common way of HCV transmission in Luxembourg.

关键词： Hepatitis C virus Genotypes Luxembourg Risk factors Substance abuse Prisons

Low-power(mW) nonlinearities of polarization maintaining fibers

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Photonics Research 2019年第12期7卷 1386-1390页

作者： HANIEH AFKHAMIARDAKANI LUKE HORSTMAN LADAN ARISSIAN jean-claude DIELS University of New Mexico CHTM 1313 Goddard SEAlbuquerqueNew Mexico 87106USA Physics Department University of OttawaCanada

For space missions,there is a need for fiber lasers of minimum power consumption involving stabilized frequency *** exploit the extreme sensitivity of the polarization state of circularly polarized light sent through polarization-maintaining(PM)fibers to power and temperature ***-power nonlinear transmission is demonstrated by terminating a PM fiber by an appropriately oriented *** strong correlation between the power sensitivity of the polarization state and the temperature dependence of the birefringence of the PM fiber can be exploited for optical length stabilization in fiber lasers and interferometers.

关键词： polarization power fiber

Ontogeny of Drosophila melanogaster female sex-appeal and cuticular hydrocarbons

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Integrative Zoology 2010年第3期5卷 272-282页

作者： Marisa ARIENTI claude ANTONY claude WICKER-THOMAS jean-Paul DELBECQUE jean-Marc JALLON University of Paris South 11 Center of Neurosciences of Paris SouthOrsayFrance Department of Biology Autonoma Metropolitan University-XochimilcoMexico DFMexico EMBL HeidelbergGermany LEGS CNRSGif sur YvetteFrance University of Bordeaux 1 Center of Integrative and Cognitive NeurosciencesTalenceFrance

The chemical communication system in Drosophila melanogaster Meigen,1830 plays a major role in courtship and consists of the male-specific cis-Vaccenyl acetate and sex-specific contact pheromones,cuticular hydrocarbons(CHC),which build up during ontogeny(first 4 days).They replace longer CHCs,common to both sexes and present only after the imaginal eclosion.A detailed quantitative description of the evolution of cuticular unsaturated hydrocarbons with age is presented here for males and females of different *** strains,which have been bred in well controlled *** appear in both sexes at around 12 h,before female *** present paper argues that this is likely linked to the switching on of a new set of ***,which is more abundant in females than in males during this critical period,might control this *** behavioral studies show that whereas female of all ages trigger early mature male courtship steps like wing vibration,only females older than 1 day trigger late courtship steps like attempted *** supports the hypothesis that late male courtship steps might be triggered by the CHCs,which build up after this age,especially female-specific(Z,Z)-7,11-and(Z,Z)-5,9-dienes.

关键词： contact pheromones Drosophila melanogaster ecdysone control ontogeny sex differences

Potential Use of Polyelectrolyte Multilayer thin Films in Vascular Tissue Engineering:Evaluation of the Viability and Adhesion of Endothelial Cells

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生物医学工程学杂志 2005年第S1期22卷 117-118页

作者： Cédric BOURA Halima KERDJOUDJ Vanessa MOBY Pierre SCHAAJ jean claude VOEGEL jean-Fran·ois STOLTZ Patrick MENU Mécanique et Ingénierie Cellulaire et Tissulaire LEMTA-UMR CNRS 7563Facultéde Médecine54505 Vandoeuvre-lès-NancyFrance Institut Charles Sadron(CNRS-ULP) UPR 22 CNRS67083 StrasbourgFrance INSERM U 595 Facultéde Médecine67085 StrasbourgFrance

1 Introduction A method in vascular tissue engineering to obtain hemocompatible synthetic prosthesis consist s to cover the luminal surface by a monolayer of endothelial cell s(ECs).Nevertheless,the surface of current prosthesi s does not favour the development of an ECs ***,a new versatile method of self2assembled archi2 tectures based on the alternate adsorption of polycations and polyanions has been developed to lead to the build2up of multilayered polyelectrolyte films(MPF).This new type of surface modification offers also large possibilities for varying the physico2chemical properties such as rough2 ness or surface charges,film thickness and viscoelastic properties.

关键词： Tissue Engineering thin Films viscoelastic properties surface modification tissue engineering endothelial cells method of type of

Short Term Use of Empagliflozin Does Not Improve Left Ventricular Function in Non-Diabetic Hypertensive Patients: Results from a Non-Randomised Controlled Trial

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World Journal of Cardiovascular Diseases 2020年第8期10卷 563-571页

作者： Liliane Mfeukeu-Kuate jean-claude Katte Krystel Ebo jean claude Mbanya Eugene Sobngwi Department of Internal Medicine and Specialities Faculty of Medicine and Biomedical Sciences University of Yaoundé 1 Yaoundé Cameroon Cardiology Unit Yaoundé Central Hospital Yaoundé Cameroon National Obesity Center and Endocrinology and Metabolic Disease Unit Yaoundé Central Hospital Yaoundé Cameroon Laboratory of Molecular Medicine and Metabolism Biotechnology Center University of Yaoundé 1 Yaoundé Cameroon

Background: A selective inhibitor of sodium-glucose cotransporter 2 (SGLT2), empagliflozin, has demonstrated its effects in reducing cardiovascular mortality and hospitalization rates for heart failure in type 2 diabetes patients. However, the cardiac-intrinsic mechanism for this cardiovascular benefit has not been sufficiently studied. We therefore aimed to investigate the effect of empagliflozin on left ventricular function in a group of patients with grade I hypertension. Methods: We carried out a single-arm non-randomized clinical trial at the National Obesity Centre in Yaoundé over a period of 8 months (October 2016 to May 2017), where patients were assigned to receive 25 mg of empagliflozin once daily. Cardiac ultrasound, 24-hour ambulatory blood pressure measurement, resting electrocardiography and biological assessment were carried out at baseline and at the end of a 6-week treatment period with empagliflozin. The primary outcome was the improvement of the left ventricular relaxation evaluation criteria. Ethical approval was obtained from the Centre Regional Ethics Committee in Yaoundé, Cameroon. Results: A total of 11 patients were treated (median observation time, 6 weeks). We noted a non-significant improvement in the early lateral annular velocity from 9.7 [9.2 -

关键词： Empagliflozin Cardiovascular Mortality Mitral Velocity E’ ABPM ECG