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A rotary ultrasonic motor using radial bending mode of ring with nested PZT excitation

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第3期13卷 189-196页

作者： Ying-xiang LIU Jun-kao LIU Wei-shan chen Xiao-hui YANG State Key Laboratory of Robotics and System Harbin Institute of Technology Horbin 150001 China

This study presents and verifies a new idea for constructing a rotary traveling wave ultrasonic motor （USM） that uses the radial bending mode of a ring. In the new design, 20 trapezoid cross section slots are cut symmetrically in the outer surface of a thick duralumin alloy ring, where 20 PZT stacks are nested. In each slot, two wedging blocks are set between the PZT stack and the two sides of the slot respectively to apply preloading on the PZT ceramics. Two radial bending modes of the stator that have a phase difference of a quarter wavelength on space are generated by using the d33 operating mode of the PZT elements, and then a flexural traveling wave is formed by the superimposing of two standing waves whose amplitudes are equal and phases are different by 90~ temporally. Two conical rotors are pressed to each end of the ring type stator by a coiled spring. The finite element method （FEM） simulation is developed to validate the feasibility of the proposed motor. The maximal speed and torque of the prototype are tested to be 126 r/rain and 0.8 N＇m, respectively.

关键词： Rotary ultrasonic motor Radial bending mode Traveling wave Wedging block clamped structure

Induction of Volatile Organic Compounds of Lycopersicon esculentum Mill. and Its Resistance to Botrytis cinerea Pers. by Burdock Oligosaccharide

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Journal of Integrative Plant Biology 2006年第5期48卷 550-557页

作者： Pei-Qing He Li Tian kao-shan chen Lin-Hua Hao Guang-You Li First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Qingdao University of Science and Technology Qingdao 266061 China Shool of Life Sciences Shandong University Jinan 250100 China

In the present study, we investigated the induction of volatile organic compounds （VOCs） of Lycoperslcon esculentum Mill. and its resistance to Botrytis cinerea Pers. by burdock oligosaccharlde. The disease severity of L. esculentum was evaluated 48 h after treatment with 0.6% burdock oligosaccharlde, followed by inoculation with a spore suspension of B. cinerea. The formation of O2＇, the activity of lipoxygenases （LOX）, peroxidase （POD）, cataiase （CAT）, and superoxide dismutase （SOD）, and the quantity and quallty of changes In VOCs were determined a period of time after treatment with 0.6% burdock ollgosaccharide. The results demonstrated that the disease index in treated plants was decreased by 42.5% compared with control 96 h after Inoculation. The production of O2＇ reached a maximum 6 h after treatment （1.36-fold compared with control）. There was an increase in LOX, POD, CAT and SOD activity in response to burdock oligosaccharide treatment and the enzymes showed different trends in the time-course of induction. At 120 h after treatment, （E）-2-hexenal was increased by 92% compared with control, whereas methyl salicylate showed a gradual Increase with induction period. Previous results had demonstrated that chitosan elicitor enhanced the production VOCs of L. esculentum and decreased plant susceptibility towards B. clnerea. Together, these findings suggest that increasing the production of VOCs in response to burrdock oligosaccharide may be an important mechanism for L. esculentumin its defense against pathogens, in addition, burrdock oligosaccharlde may act as a potent elicitor of resistance to disease in L. esculentum.

关键词： burdock oligosaccharide induction Lycopersicon esculentum resistance volatile organic compounds.

Effects of Crop Development on the Emission of Volatiles in Leaves of Lycopersicon esculentum and Its Inhibitory Activity to Botrytis cinerea and Fusarium oxysporum

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Journal of Integrative Plant Biology 2008年第1期50卷 84-91页

作者： Peng-Ying Zhang kao-shan chen Pei-Qing He Sheng-Hao Liu Wan-Feng Jiang College of Life Sciences Shandong University Jinan 250100 China Key Laboratory of Marine Bioactive Substances First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Qingdao Quafity Supervision and Inspection Center for Shopping Basket Commodity Qingdao 266003 China

Volatiles emitted from the leaves of Lycopersicon esculentum at the two-, ten-leaf and anthesis periods were collected by a gas absorbing method and analyzed by gas chromatography （GC）-mass spectrometry. In total, 33 compounds of volaUles emitted from three developmental stage plants were separated and identified, and quantitatively analyzed by the internal standard addition method. All of the samples of volatile were found to be rich in monoterpenes and sesquiterpenes.β-phellandrene and caryophyllene predominated in the volatiles of the leaves of plants at the two- and ten-leaf stages. Furthermore, （E）-2-hexenal were the dominant components in the volatiles emitted from anthesis plants. The results of volatiles analyzed show that the compositions varied depending on the developmental stages. The volatiles emitted from crushed tomato leaves of plants at the anthesis stage had the most strongly inhibitory activity against the spore germination and hyphal growth of Botrytis cinerea and Fusarium oxysporum, followed by ten- and two-leaf plants. However, the activity of volatiles, emitted from the leaves of plants at the two-leaf stage, in inhibiting F. oxysporum was greater than B. cinerea.

关键词： development inhibitroy activity Lycopersicon esculentum volatiles.

A Study on Organizational Commitment,Work Motivation,and Job Performance After the COVID-19 Epidemic in Taiwan-The Mediating Effects of Work Motivation and Organizational Communication

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Management Studies 2023年第2期11卷 65-74页

作者： kao-shan chen Vanung University Taoyuan CityTaiwanChina

The purpose of this study is to explore the correlation between organizational commitment and job performance among employees in Taiwan Residents companies after the COVID-19 epidemic,and to use work motivation and organizational communication as intermediary variables to further understand the interaction between *** hierarchical multiple regression analysis and bootstrap method to analyze,the research results show that organizational commitment has a significant positive impact on work motivation and work performance,and work motivation also has a significant positive impact on work *** addition,organizational communication has a mediating effect on organizational commitment and work motivation,and work motivation also has a mediating effect on organizational commitment and work machine *** results of this study hope to understand the working conditions of organizations and employees after the COVID-19 epidemic,and provide relevant business operators with follow-up references for their operations.

关键词： organizational commitment work motivation job performance work motivation organizational communication COVID-19

Off-on-off luminescent switching of a dye containing imidazo[4,5-f][1,10]phenanthroline

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Chinese Chemical Letters 2011年第6期22卷 647-650页

作者： Hai Guang Zhang Xu Tang Tao kao shan chen Chun Xue Yuan Shi Na Yan Min Hua Jiang College of Chemistry Science Qufu Normal UniversityQufu 273165China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China School of Life Science Shandong UniversityJinan 250100China

A new acid-base fluorescent switch containing both imidazo[4,5-f][1,10]-phenanthroline and triphenylamine groups has been *** fluorescence emissions and absorptions can be reversibiy changed through protonation/deprotonation of imidazole and amine moiety by controlling the intramolecular charge transfer（ICT） process,leading to off-on-off fluorescent molecular switching.

关键词： Fluorescence switch Imidazo[4 5-f][1 10]phenanthroline Triphenylamine Intramolecular charge transfer(ICT)

Synthesis and characterization of a new chromophor with acid/base-sensitive fluorescence emission

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Chinese Chemical Letters 2011年第9期22卷 1051-1054页

作者： Hai Guang Zhang Xu Tang Tao kao shan chen Chun Xue Yuan Shi Na Yan Min Hua Jiang College of Chemistry Science Qufu Normal University Qufu 273165 China State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China School of Life Science Shandong University Jinan 250100 China

A new two-photon absorption compound, 2-{4-[（dicyanomethylidene-5,5-dimethylcyclohexl）vinyl]phenyl}imidazo[4,5- f][1,10]phenanthroline （DDVPIP）, was synthesized and characterized. The one-photon excited fluorescence （OPEF） and two- photon excited fluorescence （TPEF） of DDVP1P are sensitive to the acid/base of the solution, which are enhanced in basic solution but weakened in acidic solution. Charge-transfer （CT） states of DDVPIP were calculated through theory methods to explain its acid/ base-sensitive fluorescent properties.

关键词： Imidazo[4,5-f][ 1,10]phenanthroline Two-photon absorption Two-photon fluorescence

New Taub-NUT black holes with massive spin-2 hair

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 51-58页

作者： Yu-Qi chen Hai-shan Liu Center for Joint Quantum Studies and Department of Physics School of ScienceTianjin UniversityTianjin 300350China

We consider Einstein gravity extended with quadratic curvature invariants,within which the well-known Ricci-flat Taub-NUT black hole remains a *** analysis of the unstable Lichnerowicz modes in the Taub-NUT background enables us to identify the mass and NUT parameters(m,n)where new Taub-NUT black holes can *** then adopt numerical techniques to construct these new Taub-NUT black holes,which bifurcate away from the Ricci-flat *** the Ricci-flat Taub-NUT,there can exist two new black holes for an appropriate given temperature,making it a total of three if we include the Ricci-flat one.

关键词： higher derivative gravity black hole solution Taub-NUT spacetime

The gut microbiome modulate response to immunotherapy in cancer

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Science China(Life Sciences) 2025年第2期68卷 381-396页

作者： shan-shan Jiang Zi-Ran Kang Ying-Xuan chen Jing-Yuan Fang Division of Gastroenterologyand Hepatology Shanghai Instituteof Digestive DiseaseNHC KeyLaboratoryof Digestive DiseasesState KeyLaboratoryfor Oncogenesand Related GenesRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200001China

Gut microbiota have been reported to play an important role in the occurrence and development of malignant ***,clinical studies have identified specific gut microbiota and its metabolites associated with efficacy of immunotherapy in multiple types of *** investigations have elucidated that gut microbiota modulate the antitumor immunity and affect the efficacy of cancer *** microbiota and its metabolites may favorably remodel the tumor microenvironment by engaging innate and/or adaptive immune *** how the gut microbiome interacts with cancer immunotherapy opens new avenues for improving treatment *** microbial transplants,probiotics,dietary interventions,and other strategies targeting the microbiota have shown promise in preclinical studies to enhance the *** clinical trials are evaluating these *** review presents the recent advancements in understanding the dynamic interplay among the host immunity,the microbiome,and cancer immunotherapy,as well as strategies for modulating the microbiome,with a view to translating into clinical applications.

关键词： cancer immunotherapy gut microbiota intratumoral microbiota microbiota-derived metabolites innate and adaptive immunity

Wave effect of gravitational waves intersected with a microlens field II:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 237-250页

作者： Xikai shan Guoliang Li Xuechun chen Wen Zhao Bin Hu Shude Mao Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Department of Astronomy Tsinghua UniversityBeijing 100084China Institute for Frontier in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China School of Physics and Astronomy Beijing Normal UniversityBeijing 100875China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves(SLGWs).This effect presents both challenges and opportunities for the detection and appli-cation of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses(10^(3)-10^(6)).Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algo-rithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work(***.66,239511,2023),this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type II SLGWs(from saddle position of the time delay surface)due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%(11%)of SLGWs have a mismatch larger than 1%(3%)compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10^(−3),and 61%(25%)of signal pairs have a mismatch larger than 1%(3%).Theref

关键词： gravitational lensing diffractional integral algorithm gravitational wave