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Journal of Integrative Plant Biology 2014年第9期56卷 902-915页

作者： Li-En Yang Xing-Qi Huang Yu Hang yin-yin deng Qin-Qin Lu Shan Lu State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing University Department of Biology and Food Engineering Changshu Institute of Technology Institute of Fisheries of Jiangsu Province

Carotene hydroxylases catalyze the hydroxylation of a- and β-carotene hydrocarbons into *** red algae,β-carotene is a ubiquitously distributed carotenoid,and hydroxylated carotenoids such as zeaxanthin and lutein are also ***,no enzyme with carotene hydroxylase activity had been previously identified in red ***,we report the isolation of a gene encoding a cytochrome P450-type carotene hydroxylase（PuCHY1） from Porphyra umbilicalis,a red alga with an ancient *** comparisons found PuCHY1 belongs to the CYP97 B subfamily,which has members from different photosynthetic organisms ranging from red algae to land *** complementation in Escherichia coli suggested that PuCHY1 catalyzed the conversion from β-carotene to *** we overexpressed PuCHYi in the Arabidopsis thaliana chy2 mutant,pigment analysis showed a significant accumulation of hydroxylated carotenoids,including neoxanthin,violaxanthin,and lutein in the leaves of transgenic *** results confirmed a β-hydroxylation activity of PuCHY1,and also suggested a possible ε-hydroxylation *** pigment profile and gene expression analyses of the algal thallus under high-light stress suggested that *** is unlikely to operate a partial xanthophyll cycle for photoprotection.

关键词： Bangiales carotene hydroxylase carotenoid metabolism CYP97B cytochrome P450 Porphyra umbilicalis red algae

Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 311-324页

作者： Qian yin Fan Wen Zhigang Tao Hai Pu Tianci deng Yaoyao Meng Qingbin Meng Hongwen Jing Bo Meng Jiangyu Wu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of EducationXinjiang Institute of EngineeringUrumqi 830023China

The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious ***,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of *** mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically *** results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,***,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the ***σ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite ***ε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse *** increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure.

关键词： cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes

Solutions for a Class of Singular Nonlinear Boundary Value Problem Involving Critical Exponent

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Acta Mathematicae Applicatae Sinica 2008年第3期24卷 453-472页

作者： yin-bin deng Li Wang School of Mathematics and Statistics Central China Normal University Wuhan 430079 China

In this paper, we consider the existence of multiple solutions for a class of singular nonlinear boundary value problem involving critical exponent in Weighted Sobolev Spaces. The existence of two solutions is established by using the Ekeland Variational Principle. Meanwhile, the uniqueness of positive solution for the same problem is also obtained under different assumptions.

关键词： Variational methods singular boundary value problem multiple solutions

Influence rule of downtime on heat transfer in converters

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Journal of Iron and Steel Research International 2019年第3期26卷 251-258页

作者： Shuai deng An-jun Xu Rui-yu yin School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The models for calculating the heat transfer in converters allow the accurate control of heat dissipation caused by downtime,and thus help in crease scrap ratio and reduce energy consumptio *** 17 was used to establish such a model to analyse the coupling law between the downtime and heat dissipation of the converter and the temperature drop of molten *** was measured by infrared detection,and model accuracy was verified by comparative *** variation law of the amount of cold charge added for different downtimes under different process conditions was *** results show that the range of the variation of heat dissipation caused by downtime is 8.9-78.5 *** the downtime increases by 30 min,heat dissipation of dephosphorisation(deP)and decarburisation(deC)converters increases by about 23.4 and 41.3 GJ,*** a certain smelting cycle,the temperature drop of the molten iron for deP,deC and conventional converters increases by about 12.5,15.0 and 17.0 K,respectively;and the amount of scrap added in the double-linking and conventional smelting processes decreases by 0.93 and 0.75%,respectively.

关键词： Downtime Converter heat dissipation Scrap ratio Temperature field Finite element

Parameter effects on high-speed UAV ground directional stability using bifurcation analysis

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Chinese Journal of Aeronautics 2021年第11期34卷 1-14页

作者： Qiaozhi yin Xiaohui WEI Hong NIE Jian deng State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and AstronauticsNanjing 210016China MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures Nanjing University of Aeronautics and AstronauticsNanjing 210016China

A loss of ground directional stability can trigger a high-speed Unmanned Aerial Vehicle(UAV)to veer off the *** order to investigate the combined effects of the key structural and operational parameters on the UAV ground directional stability from a global perspective,a fully parameterized mathematical high-speed UAV ground nonlinear dynamic model is developed considering several nonlinear *** bifurcation analysis procedure of a UAV ground steering system is introduced,following which the simulation efficiency is greatly improved comparing with the time-domain simulation *** the numerical continuation method is employed to investigate the influence of the nose wheel steering angle and the global stability region is *** bifurcation parameter plane is divided into several parts with different stability properties by the saddle nodes and the Hopf bifurcation *** find that the UAV motion states will never cross the bifurcation curve in the nonlinear ***,the dual-parameter bifurcation analyses are presented to give a complete description of the possible steering *** is also found that BT bifurcation appears when the UAV initial rectilinear velocity and the tire frictional coefficient *** addition,results indicate that the influence of tire frictional coefficient has an opposite trend to the influence of initial rectilinear ***,using bifurcation analysis method to identify the parameter regions of a UAV nonlinear ground dynamic system helps to improve the development efficiency and quality during UAV designing phase.

关键词： Bifurcation analysis Ground directional stability High-speed UAV Nonlinear system Numerical continuation

Study on modal characteristics and vibration reduction of an aircraft rotor–stator brake-induced squeal system

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Acta Mechanica Sinica 2020年第6期36卷 1350-1359,I0004页

作者： Qiaozhi yin Xiaohui Wei Hong Nie Jian deng State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle Nanjing University of Aeronautics and AstronauticsNanjing210016China Nanjing Center for Multifunctional Lightweight Materials and Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

Based on the modal coupling theory,the rotor and stator contact stiffness and axial relative velocity are considered to build an electric aircraft brake dynamic system model in this *** the complex modal analysis and transient dynamic analysis methods are used to study the aircraft brake squeal performance and vibratory *** unstable vibration modes indicate that the out-of-plane vibration plays an important role and the feed-in energy is larger than the output energy in the brake rotor–stator module so that brake squeal takes *** the influences of the contact stiffness,friction damping and frictional coefficient on the brake squeal system are carried out,laying the foundation for the three proposed vibration suppression *** show that the coefficient negative-slope condition will intensify the ***,a linear relationship between the squeal factor and the frictional coefficient is obtained to provide a guidance to predict squeal stability under more *** reduction design shows that adding a damping layer to the brake mechanism and chamfering the edge of braking stators both can reduce brake squeal effectively,while slotting braking stators is invalid in aircraft braking system.

关键词： Aircraft rotor-stator bake-induced vibration Brake squeal-Vibration stability Modal coupling Vibration suppression

Design and Fabrication of Reflective Phase Shifter for Two-Dimensional Terahertz Beam-Scanning Reflectarray

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Chinese Journal of Electronics 2022年第3期31卷 581-588页

作者： YANG Jun yin Mingjun GAO Haoyu yin Zhiping YE Yang deng Guangsheng LU Hongbo Special Display and Imaging Technology Innovation Center of Anhui Province Academy of Opto-electric TechnologyHefei University of Technology Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing Guilin University of Electronic Technology Space Star Technology Co. Ltd.

A reflective phase shifter is proposed to realize the two-dimensional beam-scanning *** reflectarray is composed of double-dipole resonant elements in which the phase shift is implemented by applying a driving voltage to the liquid crystal(LC). A 30 ×30 phase shifter sample is fabricated on a quartz substrate with a 480 μm thickness and a 4 cm × 4 cm *** to the experimental results, 0 to 360° phase shift can be achieved within the bandwidth of 5 GHz. In order to accomplish two-dimensional beam-scanning and reduce the negative impact of driving lines on the reflectarray, a new LC driving method is developed. To verify the accuracy of the proposed approach, three samples of different driving line numbers are designed using the above-mentioned phase shifter, which all have achieved a0-360° phase shift in the bandwidth of 4 GHz. Considering the influence of LC anisotropy and inhomogeneity, an improved calculation result is obtained and compared with experimental data.

关键词： liquid crystals phase shifters above-mentioned phase shifter reflective phase shifter double-dipole resonant elements submillimetre wave antennas LC anisotropy two-dimensional terahertz beam-scanning reflectarray driving voltage dipole antenna arrays scanning antennas driving line numbers LC driving method reflectarray antennas

Synergistic effects between Suilllus luteus and Trichoderma virens on growth of Korean spruce seedlings and drought resistance of Scotch pine seedlings

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Journal of Forestry Research 2016年第1期27卷 193-201页

作者： Dachuan yin Xun deng Ruiqing Song Northeast Forestry University Harbin China Forestry Protection Institute Heilongjiang Academy of Forestry Harbin China

Korean spruce （Picea koraiensis Sieb. E1 Zucc.） is one of the main afforestation species in northern China. Seedling quality is a critical factor at planting time. To test whether the synergistic growth enhancement of Scotch pine （P. sylvestris var. mongolica） seedlings brought by the plant beneficial fungus Trichoderma virens （J.H. Mill., Giddens and A.A. Foster） Arx and ectomycorrhizal fungus （Suillus luteus （L.） Roussel.） can also benefit Korean spruce seed- lings, we examined the effects of S. luteus and T. virens on the growth of P. koraiensis seedlings and drought resistance of P. sylvestris var. mongolica in peat soils. The two fungi were added to sterilized peat soil in pots, and the plants were grown for 4 months. Seedling growth and physiological variables, including mycorrhizal colonization rate of roots, biomass, and chlorophyll content, were examined. The colonization rate of the mycorrhizal fungus on P. koraiensis exceeded 65 %, and the synergism between S. luteus and T. virens enhanced most of the variables for P. koraiensis seedlings after inoculation with S. luteus then 30 days later with T. virens as in our published results for seedlings of P. sylvestris var. mongolica. When seedlings of P. sylvestris var. mongolica were inoculated with this sequence, they became more drought tolerant. T. virens also induced S. luteus to produce -l,3-glucanase and chitinase. This inocu- lation sequence at planting can thus improve the quality of P. sylvestris var. mongolica and P. koraiensis seedlings and substantiates our previous results.

关键词： Drought tolerance Growth enhancement Suillus luteus Synergistic interaction Trichoderma virens

Graphic Sequences with a Realization Containing Intersecting Cliques

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Acta Mathematica Sinica,English Series 2012年第2期28卷 405-416页

作者： Jian Hua yin Yan Fang deng Department of Mathematics College of Information Science and Technology Hainan University

Let r ≥1, k ≥ 2 and Fm1,… k;r denote the most general definition of a friendship graph,

关键词： Degree sequence potentially P-graphic sequence

Efficient molten salt CO_(2)capture and selective electrochemical transformation processes toward carbon neutrality:advances,challenges,and prospects

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Science China Chemistry 2023年第11期66卷 3116-3135页

作者： Bowen deng Huayi yin Kaifa Du Dihua Wang School of Resource and Environmental Sciences Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and EnergyWuhan UniversityWuhan 430072China

Atmospheric carbon dioxide(CO_(2))concentration has reached record levels due to excessive anthropogenic CO_(2)emissions from massive industrial ***-energy-driven CO_(2)electroreduction is an effective method of directly converting CO_(2)into various value-added chemicals or materials without subsequent geological disposal *** to their promising thermal stability,wide electrochemical window,tunable oxo-basicity,and nontoxic nature,molten salt electrolytes endow intrinsic advantages,such as fast CO_(2)absorption and selective electrochemical transformation,among different electrolyte species,wherein advanced carbon materials,CO,and hydrocarbons can be generated at relatively high current ***,we review the recent advances in molten salt CO_(2)capture and electrochemical transformation(MSCC-ET)technologies,including reaction mechanisms,CO_(2)absorption kinetics,electrode reaction kinetics,and product *** review highlights feasible strategies for regulating nanostructures,carbon product crystallinity,energy efficiency,overall CO_(2)conversion efficiency,and MSCC-ET adaptability toward practical flue ***,suitable cost-effective inert anode candidates for the oxygen evolution reaction are discussed.

关键词： carbon dioxide electroreduction CO_(2)capture molten salt electrode reaction energy efficiency