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A Simplified Nonlinear Model of Vertical Vortex-Induced Force on Box Decks for Predicting Stable Amplitudes of Vortex-Induced Vibrations

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Engineering 2017年第6期3卷 854-862页

作者： Le-Dong Zhu xiao-Liang Meng Lin-qing Du ming-Chang Ding State Key Laboratory of Disaster Reduction in Civil Engineering & Department of Bridge Engineering College of Civil Engineering & Key Laboratory for Wind Resistance Technology of Bridges of Ministry of Transport Tongji University Shanghai 200092 China Shanghai Urban Construction Municipal Engineering (Croup) Co. Ltd. Shanghai 200065 China Tongji Architectural Design (Group) Co. Ltd. Shanghai 200092 China Highway Planning Survey Design and Research Institute Sichuan Provincial Transport Department Chengdu 610041 China

Wind-tunnel tests of a large-scale sectional model with synchronous measurements of force and vibration responses were carried out to investigate the nonlinear behaviors of vertical vortex-induced forces （VIFs） on three typical box decks （i.e., fully closed box, centrally slotted box, and semi-closed box）. The mechanisms of the onset, development, and self-limiting phenomenon of the vertical vortex-induced vibration （VlV） were also explored by analyzing the energy evolution of different vertical VIF components and their contributions to the vertical VIV responses. The results show that the nonlinear components of the vertical VIF often differ from deck to deck; the most important components of the vertical VIF, governing the stable amplitudes of the vertical VIV responses, are the linear and cubic components of velocity contained in the self-excited aerodynamic damping forces. The former provides a constant negative damping ratio to the vibration system and is thus the essential power driving the development of the VIV amplitude, while the latter provides a positive damping ratio proportional to the square of the vibration velocity and is actually the inherent factor making the VIV amplitude self-limiting. On these bases, a universal simplified nonlinear mathematical model of the vertical VIF on box decks of bridges is presented and verified in this paper; it can be used to predict the stable amplitudes of the vertical VIV of long-span bridges with satisfactory accuracy.

关键词： Box deck of bridge Vertical vortex-induced vibration Vertical vortex-induced force Simplified nonlinear model Wind-tunnel test Large-scale sectional model Synchronous measurement of force and vibration

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Photoregulation of protein plasmid expression in vitro and in vivo using BHQ caging group

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Chinese Chemical Letters 2011年第3期22卷 338-341页

作者： Zhi Ping Zhang ming Li xiao Yun Chen qing Xiang Guo Department of Chemistry University of Science and Technology of China Hpfei 230026 China Department of Chemistry Tsinghua University Beijing 100084 China

Green fluorescent protein（GFP） plasmid was caged by 8-bromo-7-hydroxyquinolinyl chromophore（BHQ） for controlling its expression with exact spatiotemporal *** vitro and in vivo experiments clearly verified that,comparing with Bhc caging, the expression level of caged GFP plasmid was dramatically decreased and then efficiently restored after subsequent photolysis.

关键词： Photoregulation Caging(uncaging) BHQ Green fluorescent protein plasmid Photolysis

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Development of a fully coupled aero-hydro-mooring-elastic tool for floating offshore wind turbines

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Journal of Hydrodynamics 2019年第1期31卷 21-33页

作者： Yuanchuan Liu qing xiao Department of Naval Architecture Ocean and Marine EngineeringUniversity of StrathclydeGlasgowUK

A floating offshore wind turbine (FOWT) is a coupled system where a wind turbine with flexible blades interacts with a moored platform in wind and *** paper presents a high-fidelity aero-hydro-mooring-elastic analysis tool developed for FOWT applications.A fully coupled analysis is carried out for an OC4 semi-submersible FOWT under a combined wind/wave *** of the FOWT are investigated in terms of platform hydrodynamics,mooring dynamics,wind turbine aerodynamics and blade structural *** between the FOWT and fluid flow are also analysed by visualising results obtained via the CFD *** this work,the capabilities of the tool developed are demonstrated and impacts of different parts of the system on each other are investigated.

关键词： Floating offshore wind turbine fluid-structure interaction blade elasticity mooring dynamics OpenFOAM

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A midgut-specific lytic polysaccharide monooxygenase of Locusta migratoria is indispensable for the deconstruction of the peritrophic matrix

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Insect Science 2022年第5期29卷 1287-1298页

作者： ming-Bo Qu xiao-Xi Guo Lin Kong Ling-Jie Hou qing Yang School of Bioengineering Dalian University of TechnologyDalianLiaoning ProvinceChina State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhenGuangdong ProvinceChina

Lytic polysaccharide monooxygenases(LPMOs)are important enzymes that boost the hydrolysis of recalcitrant polysaccharides,such as *** are found extensively in different insect species and are classified as auxiliary activities family 15(AA15)LPMOs(LPMO15).Some of them were identified from the insect midgut and proven to act on ***,knowledge about their physiological roles during insect growth and development remains ***,we found that midgut-specific LPMO15s are widely distributed in different insect orders,such as the orthopteran Locusta migratoria and the lepidopteran Bombyx *** *** as a model insect,the function of midgut-specific LmLPMO15-3 during development was ***-stranded RNA-mediated downregulation of LmLPMO15-3 expression at the 4th or 5th instar nymph stage severely decreased the survival rate and resulted in lethal *** and eosin staining results indicated that the deficient individuals exhibited incompletely digested peritrophic matrix(PM),which suggested that LmLPMO15-3 is essential for the deconstruction of the PM during *** study provides direct evidence of the physiological importance of a midgut-specific LPMO15 during insect *** *** is one of the most destructive agricultural pests,LmLPMO15-3 is a potential target for pest management.

关键词： chitin Locusta migratoria lytic polysaccharide monooxygenase midgut peritrophic matrix RNAi

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Effects of solar radiation and fine roots on suction of Amorpha fruticose-vegetated soil

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Journal of Mountain Science 2023年第6期20卷 1790-1804页

作者： GUO Han-qing CHEN xiao-qing SONG Dong-ri MU qing-yi SADEGHI Hamed JIANG Hao LV ming Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610299China University of Chinese Academy of Sciences Beijing 100049China Department of Civil Engineering Xi'an Jiaotong UniversityXi'an 710049China Department of Civil Engineering Sharif University of TechnologyTehran ***Iran

The thickness of shallow landslides is generally less than 2 m,which is of the same order of magnitude as the growth range of vegetation *** roots can improve the stability of shallow soil through mechanical and hydraulic ***,the landslide process is closely related to the plant roots growing on the slope *** roots play a dominant role in the regulation of soil suction through solar radiation induced ***,little is known about the correlation between cumulative solar radiation and soil ***,the specific effects of fine roots on the suction distribution are not clear in most previous *** this study,a vegetated soil of a drought-tolerant and water-tolerant shrub,namely Amorpha fruticose,was *** suction and volumetric water content of bare and vegetated soils were monitored under natural conditions for 4 *** results demonstrate that there is a nearly linear relationship between cumulative solar radiation and suction ranging from zero to 100 *** the modeling of the soil-plant-atmosphere interactions,this relationship could serve a significant role in calculating the root water uptake under given solar radiation *** addition,higher suctions were observed at the lower layer of the vegetated soil than those at the middle layer,which is different from the results of vegetated soil from previous *** is due to the fact that the root area index(RAI)of fine roots at the lower layer is twice that of the middle ***,the higher concentration of fine roots at the lower layer of vegetated soil sample resembles the root distribution of shrub near the soil-bedrock interface on shallow bedrock *** fine roots would increase soil suction through transpiration,and hence reduce the permeability and increase shear strength of ***,these new findings serve as a preliminary step on the evaluation of the stability of this common ty

关键词： Field monitoring Fine roots Solar radiation Suction Shallow bedrock landslide

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天花粉蛋白及其肽段诱导的免疫抑制依赖APC表面Notch配体的表达

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现代免疫学 2006年第6期26卷 448-453页

作者：焦志军周芸辛利军路丽明丁庆周晓荣杨能周光炎上海交通大学医学院上海市免疫学研究所上海200025

新近发现,Notch信号途径参与调节外周成熟T细胞及其亚群的分化和功能发挥。本研究应用天花粉蛋白及其衍生肽处理骨髓来源的小鼠树突状细胞(DC),检测Notch配体家族分子的表达及DC对CD8+T细胞分泌细胞因子的影响。结果表明,天花粉蛋白或... 详细信息

新近发现,Notch信号途径参与调节外周成熟T细胞及其亚群的分化和功能发挥。本研究应用天花粉蛋白及其衍生肽处理骨髓来源的小鼠树突状细胞(DC),检测Notch配体家族分子的表达及DC对CD8+T细胞分泌细胞因子的影响。结果表明,天花粉蛋白或其衍生肽PB处理DC可使Notch配体Jagged1、Delta1分子表达明显增加,并改变CD8+T细胞细胞因子分泌格局,明显抑制Th1相关细胞因子IFN-γ的分泌,而Th2相关细胞因子IL-4和IL-10分泌明显增加。Notch信号的阻断剂可以部分逆转Tk及肽段的抑制作用。表明天花粉蛋白及其衍生肽可诱导一群具有抑制能力的CD8+T细胞,该作用依赖于DC表面Notch配体的表达。

关键词：天花粉蛋白 Th2相关细胞因子树突状细胞 Notch配体

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New Expected Value Expansions of Rooted Graphs

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Acta Mathematicae Applicatae Sinica 2015年第1期31卷 81-88页

作者： xiao-qing TANG School of Mathematics & Information Shanghai Lixin University of Commerce

We propose a new expected value of rooted graph in this article,that is, when G is a rooted graph that each vertex may independently succeed with probability p when catastrophic thing happened, we consider the expected number of edges in the operational component of G which containing the root. And we get a very important and useful compute formula which is called deletion-contraction edge formula. By using this formula, we get the computational formulas of expected value for some special graphs. We also discuss the mean of expected value when parameter p has certain prior distribution. Finally, we propose mean-variance optimality when rooted graph has the equilibrium point which has larger mean and smaller variance.

关键词： rooted graph expected value deletion-contraction edge formula mean-variance optimality

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Ipsilateral and contralateral patent processus vaginalis in pediatric patients with a unilateral nonpalpable testis

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Asian Journal of Andrology 2023年第6期25卷 695-698页

作者： ming-ming Yu Hua Xie Yi-Chen Huang Yi-qing Lv Fang Chen xiao-Xi Li Department of Urology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Department of Urology Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233China Shanghai Eastern Urological Reconstruction and Repair Institute Shanghai 200233China

This study aimed to investigate the incidence of patent processus vaginalis(PPV)in pediatric patients with a unilateral nonpalpable testis and explore the associated *** May 2014 to April 2017,152 boys who were diagnosed with a unilateral nonpalpable testis and underwent laparoscopy in Shanghai Children’s Hospital(Shanghai,China)were included in this *** data were collected and reviewed,and the results were analyzed regarding the age at operation,side,development,and position of the nonpalpable *** mean age of the patients was 2.6(standard deviation:2.3)*** testis was absent in 14 cases,nonviable in 81 cases,and viable in 57 *** incidence of PPV was 37.5%(57 of 152)on the ipsilateral side and 16.4%(25 of 152)on the contralateral *** ipsilateral PPV was more prevalent when the nonpalpable testis occurred on the right side(P<0.01).Besides,patients with a viable testis had a greater incidence of ipsilateral PPV than those with a nonviable or absent testis(P<0.01).Moreover,this rate was the highest when the testis was in the abdominal cavity and the lowest when the testis was in the scrotum(both P<0.01).However,the incidence of contralateral PPV was independent of all the *** conclusion,in children with a nonpalpable testis,the incidence of an ipsilateral PPV was significantly related to the side,development,and position of the testis,while it was independent of these factors on the contralateral side.

关键词： children laparoscopy nonpalpable testis patent processus vaginalis

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Prediction model of end-point phosphorus content for BOF based on monotone-constrained BP neural network

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Journal of Iron and Steel Research International 2022年第5期29卷 751-760页

作者： Kai-xiao Zhou Wen-hui Lin Jian-kun Sun Jiang-shan Zhang De-zheng Zhang xiao-ming Feng qing Liu State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing100083China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing100083China Xinyu Iron and Steel Co. Ltd.Xinyu338001JiangxiChina

Dephosphorization is essential content in the steelmaking process,and the process after the converter has no dephosphorization ***,phosphorus must be removed to the required level in the converter *** order to better control the end-point phosphorus content of basic oxygen furnace(BOF),a prediction model of end-point phosphorus content for BOF based on monotone-constrained backpropagation(BP)neural network was *** the theoretical analysis of the dephosphorization process,ten factors that affect the end-point phosphorus content were determined as the input variables of the *** correlations between influencing factors and end-point phosphorus content were determined as the constraint condition of the model.200 sets of data were used to verify the accuracy of the model,and the hit ratios in the range of±0.005%and±0.003%are 94%and 74%,*** fit coefficient of determination of the predicted value and the actual value is 0.8456,and the root-mean-square error is 0.0030;the predictive accuracy is better than that of ordinary BP neural network,and this model has good *** can provide useful reference for real production and also provide a new approach for metallurgical predictive modeling.

关键词： Converter End-point phosphorus content Monotonic constraint BP neural network Prediction model Steelmaking

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Biodegradation and detoxification of the triphenylmethane dye coomassie brilliant blue by the extracellular enzymes from mycelia of Lactarius deliciosus

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Frontiers of Chemical Science and Engineering 2021年第2期15卷 421-436页

作者： Jin Zhao qing-Xi Wu xiao-Du Cheng Ting Su xiao-Hui Wang Wen-Na Zhang Yong-ming Lu Yan Chen School of Life Sciences Anhui UniversityHefei 230601China Anhui Key Laboratory of Modern Biomanufacturing Hefei 230601China

Fungi play an important role in dying wastewater *** this work,the mycelia of Lactarius deliciosus exhibited an excellent capacity in decolorizing coomassie brilliant blue(CBB).The results demonstrated that the mycelia could treat CBB with high concentrations over a broad range of pH and *** decolorization rate of 99.19%and the removal rate of 16.31 mg·L^(‒1)·h were *** mycelia could be recycled from decolorizing process for 19 times,indicating a good *** verified that the lignin peroxidase(121.65 U·L^(‒1))and manganese peroxidase(36.77 U·L^(‒1))were involved in the degradation and decolorization process of *** assessments indicated the seed germination rate was up to 82.22%while inhibition to Escherichia coli decreased dramatically and no significant effect on Caenorhabditis elegans growth was *** removal of CBB was a synergistic process accomplished by adsorption and *** mycelia could be used for eco-friendly CBB treatment.

关键词： fungus mycelia biodegradation extracellular enzymes coomassie brilliant blue Lactarius deliciosus

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