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Bilateral teleoperation with reducing wave-based reflections

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Advances in Manufacturing 2013年第3期1卷 288-292页

作者： Min Zheng Qing-hai Chen Wei Xiao hai-Nan yang College of Mechatronic Engineering and Automation Shanghai University

This paper presents a wave-based bilateral teleoperation structure to reduce the wave reflection and enhance the force and speed tracking performance through adjusting the relative parameters. A time domain passive approach is also applied to deal with the passivity of whole system even with non passive environment. The efficiency of the proposed method is confirmed by some experimental results.

关键词： Teleoperation - Wave variable - Passivity

Formation Mechanism and Emission Spectrum of AlO Radicals in Reaction of Laser-ablated Al Atom and Oxygen

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Chemical Research in Chinese Universities 2003年第3期19卷 320-323页

作者： ZHANG Shu-dong LI hai-yang Laboratory of Environmental Spectroscopy Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031P.R.China Graduate School of the Chinese Academy of Sciences Beijing 100039P.R.China Physics and Electronic Engineering College Northwest Normal UniversityLanzhou 730070P.R.China

The emission spectrum of AlO radicals was analyzed in 440-540 nm in the reaction of laser ablated Al beam and O 2. The carrier of spectrum was assigned to Δ ν =0, ±1, ±2 vibrational sequences of B 2Σ +-X 2Σ + transition of AlO radicals, the observed maximum vibrational quantum number was ν ′=6. The rotational and vibrational temperatures of B state were estimated at 3000 and 7500 K by spectrally simulating the rovibronic population distribution. There is a strong evidence that the production of excited Al( 2 S ) atoms is essential to the formation of excited AlO radicals.

关键词： Laser ablation Emission spectrum AlO Chemiluminescence reaction

Risk of asthma in preterm infants with bronchopulmonary dysplasia: a systematic review and meta‑analysis

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World Journal of Pediatrics 2023年第6期19卷 549-556页

作者： Tong Sun hai-yang Yu Miao yang Yi-Fan Song Jian-Hua Fu Department of Pediatrics Shengjing Hospital of China Medical UniversitySanhao StreetHeping DistrictShenyangChina Department of Neurology Shengjing Hospital of China Medical UniversityShenyangChina

Background This study aimed to systematically review and meta-analyze the available literature on the association between preterm infant bronchopulmonary dysplasia(BPD)and pre-adulthood *** Studies examining the association between BPD and asthma in children and adolescents were systematically reviewed,and a meta-analysis was *** searched Scopus,Embase,Web of Science,PubMed,and Cochrane Library from the database inception to March 26,*** pooled odds ratio(OR)estimate was used in our meta-analysis to calculate the correlation between BPD and the probability of developing asthma before *** 12.0 was used to conduct the statistical *** The correlation between asthma and BPD in preterm newborns was examined in nine *** used a random effect model to pool the OR *** results indicated a marked increase in the risk of subsequent asthma in preterm infants with BPD[OR=1.73,95% confidence interval(CI)=1.43-2.09].Moreover,there was no obvious heterogeneity across the studies(P=0.617,I^(2)=0%).The pooled OR remained stable and ranged from 1.65(95%CI=1.35-2.01)to 1.78(95%CI=1.43-2.21).Regarding publication bias,the funnel plot for asthma risk did not reveal any noticeable *** further performed Begg’s and Egger’s tests to quantitatively evaluate publication *** was no evidence of a publication bias for asthma risk(P>|Z|=0.602 for Begg’s test,and P>|t|=0.991 for Egger’s test).Conclusions Our findings indicate that preterm infants with BPD have a much higher risk of developing asthma in the future(OR=1.73,95%CI=1.43-2.09).Preterm infants with BPD may benefit from long-term follow-up.

关键词： Asthma Bronchopulmonary dysplasia Preterm infants

Confidence Intervals of the Generalized Pareto Distribution Parameters Based on Upper Record Values

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Acta Mathematicae Applicatae Sinica 2019年第4期35卷 909-918页

作者： Xu ZHAO Wei-hu CHENG yang ZHANG Shao-jie WEI Zhen-hai yang College of Applied Sciences Beijing University of Technology China Department of Economics Rutgers University USA

In this paper, we proposed a new efficient approach to construct confidence intervals for the location and scale parameters of the generalized Pareto distribution(GPD) when the shape parameter is known. The superiority of our method is that the distributions of pivots are exact, but not approximate distributions. The proposed interval estimation provides the shortest interval for the GPD parameter whether or not the confident distribution of the pivot is symmetric. We first estimate the location and scale parameters of the GPD using least squares and then, construct confidence intervals based on the equal probability density principle. The results of various simulation studies illustrate that our interval estimators show the better performance than competing method.

关键词： generalized Pareto distribution upper record values least squares estimator equal probability density principle confidence interval

Pillarene-Involved Metallic Supramolecular Nanostructures

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Chinese Journal of Chemistry 2015年第3期33卷 319-328页

作者： Chang-Wei Zhang Li-Jun Chen hai-Bo yang Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of ChemistryEast China Normal UniversityShanghai 200062China

Pillarenes(or pillararenes),as a new and rapidly developing class of covalent macrocycles,have stimulated a tremendous upsurge of interest in supramolecular chemistry because of their unique features and potentials in fabri-cating functional *** addition,metallo-supramolecular chemistry has grown steadily over the last few *** presence of metal in supramolecular architectures enables the systematic tuning of their properties and endows them with optical,magnetic,and electric etcetera unusual *** marriage of these two fields offers new possibilities for the fabrication of novel functional materials and *** review article provides an over-view of recent advancements on pillararene-based metallic supramolecular *** fabrication and func-tionalities of pillararene-decorated metallic macrocycles,metal-organic frameworks(MOFs),and metal nanoparti-cles are comprehensively summarized and discussed.

关键词： self-assembly pillararene metallacycle metal−organic frameworks metal nanoparticle

Model-based deep learning for fiber bundle infrared image restoration

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Defence Technology（防务技术） 2023年第9期27卷 38-45页

作者： Bo-wen Wang Le Li hai-bo yang Jia-xin Chen Yu-hai Li Qian Chen Chao Zuo Jiangsu Key Laboratory of Spectral Imaging and Intelligent Sense Nanjing University of Science and TechnologyNanjingJiangsu Province210094China Smart Computational Imaging(SCI)Laboratory Nanjing University of Science and TechnologyNanjingJiangsu Province210094China Science and Technology on Electro-Optical Information Security Control Lab Tianjin300308China

As the representative of flexibility in optical imaging media,in recent years,fiber bundles have emerged as a promising architecture in the development of compact visual *** to tackling the problems of universal honeycomb artifacts and low signal-to-noise ratio(SNR)imaging in fiber bundles,the iterative super-resolution reconstruction network based on a physical model is *** the constraint of solving the two subproblems of data fidelity and prior regularization term alternately,the network can efficiently“regenerate”the lost spatial resolution with deep *** building and calibrating a dual-path imaging system,the real-world dataset where paired low-resolution(LR)-high-resolution(HR)images on the same scene can be generated *** results on both the United States Air Force(USAF)resolution target and complex target objects demonstrate that the algorithm can restore high-contrast images without pixilated *** the basis of super-resolution reconstruction,compound eye image composition based on fiber bundle is also embedded in this paper for the actual imaging *** proposed work is the first to apply a physical model-based deep learning network to fiber bundle imaging in the infrared band,effectively promoting the engineering application of thermal radiation detection.

关键词： Fiber bundle Deep learning Infrared imaging Image restoration

A Shrinkage Estimator for Combination of Bioassays

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Acta Mathematicae Applicatae Sinica 2007年第3期23卷 467-476页

作者： Jian Xiong D.G. Chen Zhen-hai yang College of Applied Sciences Beijing University of Technology Beijing 100022 China School of Mathematics and Information Science Guangzhou University Guangzhou 510006 China Department of Mathematics and Statistics South Dakota State University Brookings SD 57007 USA

A shrinkage estimator and a maximum likelihood estimator are proposed in this paper for combination of bioassays. The shrinkage estimator is obtained in closed form which incorporates prior information just on the common log relative potency after the homogeneity test for combination of bioassays is accepted. It is a practical improvement over other estimators which require iterative procedure to obtain the estimator for the relative potency. A real data is also used to show the superiorities for the newly-proposed procedures.

关键词： Common log relative potency parallel-line bioassay slope-ratio bioassay prior information,posterior distribution marginal sufficiency

Electronic and Shallow Impurity States in Semiconductor Heterostructures Under an Applied Electric Field

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Communications in Theoretical Physics 2005年第2X期44卷 375-380页

作者： ZHOU hai-yang GU Shi-Wei SHI Yao-Ming Department of Physics Shanghai University Shanghai 200436 China Department of Applied Physics Shanghai Jiao Tong University Shanghai 200030 China

With the use of variational method to solve the effective mass equation, we have studied the electronic and shallow impurity states in semiconductor heterostructures under an applied electric field. The electron energy levels are calculated exactly and the impurity binding energies are calculated with the variational approach. It is found that the behaviors of electronic and shallow impurity states in heterostructures under an applied electric field are analogous to that of quantum wells. Our results show that with the increasing strength of electric field, the electron confinement energies increase, and the impurity binding energy increases also when the impurity is on the surface, while the impurity binding energy increases at first, to a peak value, then decreases to a value which is related to the impurity position when the impurity is away from the surface. In the absence of electric field, the result tends to the Levine's ground state energy (-1/4 effective Rydberg) when the impurity is on the surface, and the ground impurity binding energy tends to that in the bulk when the impurity is far away from the surface. The dependence of the impurity binding energy on the impurity position for different electric field is also discussed.

关键词： heterostructures electric field impurity states

Silencing Brassinosteroid Receptor BRI1 Impairs Herbivory-elicited Accumulation of Jasmonic Acid-isoleucine and Diterpene Glycosides, but not Jasmonic Acid and Trypsin Proteinase Inhibitors in Nicotiana attenuata

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Journal of Integrative Plant Biology 2013年第6期55卷 514-526页

作者： Da-hai yang Ian T. Baldwin Jianqiang Wu Department of Molecular Ecology Max Planck Institute for Chemical Ecology Hans-Knll Stra e 8 D-07745 Jena Germany Plant Stress Biology Group Shanghai Center for Plant Stress Biology Shanghai Institutes for Biological Sciences the Chinese Academy of Sciences Key Laboratory of Economic Plants and Biotechnology Kunming Institute of Botany the Chinese Academy of Sciences

The brassinosteroid （BR） receptor, BR insensitive 1 （BRI1）, plays a critical role in plant development, but whether BRI1-mediated BR signaling is involved in plant defense responses to herbivores was largely unknown. Here, we examined the function of BRI1 in the resistance of Nicotiana attenuata （Solanaceae） to its specialist insect herbivore Manduca sexta. Jasmonic acid （JA） and JA-isoleucine conjugate （JA-Ile） are important hormones that mediate resistance to herbivores and we found that after wounding or simulated herbivory NaBRI1 had little effect on JA levels, but was important for the induction of JA-Ile. Further experiments revealed that decreased JAR （the enzyme for JA-Ile production） activity and availability of Ile in NaBRI1-silenced plants were likely responsible for the low JA-Ile levels. Consistently, M. sexta larvae gained more weight on NaBRI1-silenced plants than on the control plants. Quantification of insect feeding-induced secondary metabolites revealed that silencing NaBRI1 resulted in decreased levels of carbon-rich defensive secondary metabolites （hydroxygeranyllinalool diterpene glycosides, chlorogenic acid, and rutin）, but had little effect on the nitrogen-rich ones （nicotine and trypsin proteinase inhibitors）. Thus, NaBRI1-mediated BR signaling is likely involved in plant defense responses to M. sexta, including maintaining JA-Ile levels and the accumulation of several carbon-rich defensive secondary metabolites.

关键词： BRI1 herbivore insect jasmonic acid Nicotiana attenuata secondary metabolites.