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Science China Chemistry 2011年第7期54卷 1130-1137页

作者： TANG KeWen ZHANG Panliang PAN ChunYue li hongjian Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang 414006 China College of Chemistry and Chemical Engineering Central South University Changsha 410083 China

Reactive extraction is an emerging technology for large-scale continuous resolution of drug enantiomers. The enantioselective extraction of R,S-naproxen by hydrophilic HP-β-CD in 1,2-dichloroethane was studied at 5℃. The experimental data were described by a reactive extraction model with a homogeneous aqueous phase reaction of R,S-naproxen with HP-β-CD which couples a complete description of chemical equilibria in aqueous phase with the overall phase equilibria of the system. Important parameters of this model were determined experimentally. The physical distribution coefficients for molecular and ionic NAP were 0.041 and 1.730, respectively. Here we show that the efficiency of extraction depends strongly on two process variables including pH and HP-β-CD concentration. The model predictions are compared graphically with the results of pre- vious experiments and there is a good agreement between each other. By the use of modeling and experiment, an optimized extraction condition with pH of 2.5 and HP-β-CD concentration of 0.1 mol/L was obtained with high enantioselectivity （a） of 1.59 and performance factor （pf） of 0,049. The model gives a good means of predicting enantiomers partitioning over a range of experimental conditions.

关键词： reactive extraction chiral separation naproxen enantiomers modelling hydroxypropyl-βcyclodextrin

Polarization-insensitive complementary metamaterial structure based on graphene for independently tuning multiple transparency windows

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Chinese Physics B 2020年第11期29卷 323-329页

作者： Hailong Huang Hui Xia hongjian li The Research Department Beijing Zhongkexin Electronics Equipment Co.LtdBeijing 101111China School of Physics and Electronics Central South UniversityChangsha 410083China

Polarization-insensitive multiple transparency windows are obtained with a graphene-based complementary metamaterial structure in terahertz regions,which is composed of two kinds of monolayer graphene perforated in shapes of a cross and four identical split rings that construct a *** geometric parameters of resonators are different from each *** and theoretical results show that the quantum effect of Autler-Townes splitting is the key factor for appearance of transparency windows within the resonant *** investigation demonstrates that by employing the fourfold-symmetry graphene complementary structure,polarization-independent transparency windows can be ***,multiple transparency windows can be separately manipulated over a broad frequency range via adjusting the chemical potential of the corresponding graphene resonators,and the bandwidth as well as resonance strength can also be tuned by changing the relative displacement between resonators each consisting of a cross and four split *** proposed metamaterial structure may be utilized in some practical applications with requirements of no polarization-varied loss and slowing the light speed.

关键词： graphene polarization-independent multiple transparency windows

Electroluminescence efficiency in bilayer organic light-emitting devices with liF/Al cathode

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Science China(Physics,Mechanics & Astronomy) 2007年第1期50卷 31-40页

作者： li hongjian ZHU RuHui YAN lingling ZHANG HaiYan School of Physics Science and Technology Central South UniversityChangsha 410083China

An analytical model to calculate electroluminescence (EL) efficiency of bilayer organic light-emitting devices, considering the influence of introducing liF insulating buffer layer at metal/organic interface on the barrier height for electron injection, was presented. The relations of EL efficiency versus the applied voltage and injection barrier or internal interfacial barrier or the thickness of organic layer were discussed. The results indicate that: (1) when δ e/δ h 2, M/O becomes contact limited; and when δ e/δ h = 2 (Θ h ～ 0.2 eV, Θ ～ 0.3 eV), there is a transition from ohmic contact to contact limited; (2) η EL decreases with the increase of δ′ e/δ′ h; however, when δ′ e/δ′ h > 2.5 (H′ h ～ 0.2 eV, H′ e～ 0.4 eV), the changes of η EL are very small, which shows that η EL is dominated by the carrier’s injection; (3) when increasing L h/L, η R has a descending trend at low voltage and a rising one at higher voltage. For a given L h/L, η EL first increases and then decreases with the increasing applied voltage, and as L h/L further increases, the variation tendency of η EL is more obvious. These conclusions are in agreement with the reported theoretic and experimental results.

关键词： electroluminescence efficiency injection barrier interfacial barriers liF modification

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体验经济视角下内蒙古乡村旅游预评价研究

西南大学学报（自然科学版） 2025年第1期47卷 122-133页

作者：白胤赵鸿李洪健王伟栋殷俊峰内蒙古科技大学建筑与艺术设计学院内蒙古包头014010

首先,确定游客主体在体验经济与旅游活动之间的媒介作用,以游客出行、游览、住宿、餐饮、购物及娱乐6个方面为准则层,拟定预评价体系指标,同时选取内蒙古典型旅游村进行实地调研采样,收集规划建设相关数据,对拟定的指标项进行完善和修... 详细信息

首先,确定游客主体在体验经济与旅游活动之间的媒介作用,以游客出行、游览、住宿、餐饮、购物及娱乐6个方面为准则层,拟定预评价体系指标,同时选取内蒙古典型旅游村进行实地调研采样,收集规划建设相关数据,对拟定的指标项进行完善和修正。然后,运用层次分析法和熵值法对预评价体系的合理性及权重进行检验,从而构建出一个相对科学、客观及可操作的预评价指标体系,在体验经济与旅游乡村规划建设之间建立起沟通桥梁,便于反复修正和指导建设构想。

关键词：体验经济乡村旅游评价体系

Strong optical transmission through the ellipsoid metal-film nanohole arrays

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Science China(Physics,Mechanics & Astronomy) 2009年第5期52卷 693-699页

作者： li hongjian XIE SuXia ZHOU Xin liU Qiong XIA Hui College of Physics Science and Technology Central South UniversityChangsha 410083China College of Materials Science and Engineering Central South UniversityChangsha 410083China

The transmission characteristics of a metallic film with subwavelength ellipsoid nanohole arrays are investigated by using the three-dimensional finite-difference time-domain (3D-FDTD) method. The extraordinary transmission is attributed to the collaboration of localized waveguide resonance and surface plasmon resonance. The influences of the lattice constant and the hole shape on the transmission are studied. By analyzing the picture of electric field and electromagnetic energy distribution, we show the mechanisms of the two different resonances: Localized waveguide resonance mode can be confined inside the ellipsoid holes region, while electric field and electromagnetic energy are localized separately at the two ends of ellipsoid holes for the surface plasma resonance mode.

关键词： nanohole arrays transmission characteristic localized waveguide resonance plasmon resonance

Effects of the local environment on plasmonic coupling of metallic nanotube arrays

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Science China(Physics,Mechanics & Astronomy) 2011年第1期54卷 106-110页

作者： li hongjian FU Shaoli XIE SuXia XU HaiQing ZHOU Xin WU JinJun College of Physics Science and Technology Central South University Changsha 410083 China College of Materials Science and Engineering Central South University Changsha 410083 China

We have theoretically investigated the effect of the dielectric core and the dielectric embedding medium separately on the transmission spectra and plasmonic properties of coupled metallic nanotube *** is found that the plasmonic properties of the nanotube arrays are strongly influenced by the presence of the dielectric which induces additional screening *** show that instead of one single photonic bandgap for the hollow nanotube arrays placed in air,an additional photonic bandgap arises from the presence of dielectric media in the transmission *** on the localized nature of the electric field distributions,we also clearly show the presence of the local plasmonic resonant modes that originate from multipolar plasmon polaritons in the cross section of these nanotube arrays,and that a large amount of opposing surface charges are built up in the gap between adjacent nanotubes.

关键词： metallic nanotube array plasmons transmission spectrum field distributions

KEY TECHNIQUES OF MULTI-BODY MODEliNG OF OCCUPANT RESTRAINT SYSTEM OF VEHICLE SIDE IMPACT

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Chinese Journal of Mechanical Engineering 2006年第3期19卷 396-400页

作者： ZHANG Junyuan ZHANG Min DING Rufang QIU Shaobo ZHANG Yu li hongjian Automotive College Jilin UniversityChangchun 130025 China Research and Design Center China First Automobile Group Corp. Changchun 130011 China

Based on multi-body dynamics, the simulation models of auto-side structures and occupant＇s dynamic responses are set up, using the occupant injury simulation software MADYMO3D. These models include auto-body structure, impact barrier, seat and dummy. Definitions of multi-body and joints and dynamics properties of joints based on FE combination models, of model setup are introduced. Kelvin element of MADYMO is introduced to show the force action between non-adjoining rigid bodies, too. Then all examples of the methods mentioned are given. By the comparison of simulation and real test, the contract curves between simulation and real test for main structures and biology mechanics properties of dummy are obtained. The result shows the accuracy and validity of the models.

关键词： Side impact Multi-body Joint

Triple plasmon-induced transparency and outstanding slow-light in quasi-continuous monolayer graphene structure

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Science China(Physics,Mechanics & Astronomy) 2021年第2期64卷 61-71页

作者： CuiXiu Xiong Hui Xu MingZhuo Zhao BaiHui Zhang Chao liu Biao Zeng Kuan Wu BanXian Ruan Min li hongjian li School of Physics and Electronics Central South UniversityChangsha410083China All-solid-state Energy Storage Materials and Devices Key Laboratory of Hunan Province College of Information and Electronic EngineeringHunan City UniversityYiyang413000China School of Mathematics and Statistics Hunan University of Technology and BusinessChangsha410205China

We propose a simple quasi-continuous monolayer graphene structure and achieve a dynamically tunable triple plasmon-induced transparency(PIT)effect in the proposed *** analyses indicate that the proposed structure contains a selfconstructed bright-dark-dark mode system.A uniform theoretical model is introduced to investigate the spectral response characteristics and slow light-effects in the proposed system,and the theoretical and the simulated results exhibit high *** addition,the influences of the Fermi level and the carrier mobility of graphene on transmission spectra are *** is found that each PIT window exhibits an independent dynamical adjustability owing to the quasi-continuity of the proposed ***,the slow-light effects are investigated based on the calculation of the group refractive index and phase *** is found that the structure displays excellent slow-light effects near the PIT windows with high-group indices,and the maximum group index of each PIT window exceeds 1000 when the carrier mobility of graphene increases to 3.5 m^2 V^-1s^-*** proposed structure has potential to be used in multichannel filters,optical switches,modulators,and slow-light ***,the established theoretical model lays a theoretical basis for research on multimode coupling effects.

关键词： monolayer graphene structure plasmon-induced transparency slow light

Genetic improvement of heat tolerance in wheat:Recent progress in understanding the underlying molecular mechanisms

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The Crop Journal 2018年第1期6卷 32-41页

作者： Zhongfu Ni hongjian li Yue Zhao Huiru Peng Zhaorong Hu Mingming Xin Qixin Sun State Key Laboratory for Agrobiotechnology Key Laboratory of Crop Heterosis and Utilization Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University

As a cool season crop, wheat(Triticum aestivum L.) has an optimal daytime growing temperature of 15 ℃ during the reproductive stage. With global climate change, heat stress is becoming an increasingly severe constraint on wheat production. In this review, we summarize recent progress in understanding the molecular mechanisms of heat tolerance in wheat. We firstly describe the impact of heat tolerance on morphology and physiology and its potential effect on agronomic traits. We then review recent discoveries in determining the genetic and molecular factors affecting heat tolerance, including the effects of phytohormone signaling and epigenetic regulation. Finally, we discuss integrative strategies to improve heat tolerance by utilization of existing germplasm including modern cultivars, landraces and related species.

关键词： Heat stress Phytohormone signaling Epigenetic regulation Triticum aestiuum

Comparative transcriptome analysis of the climacteric of apple fruit uncovers the involvement of transcription factors affecting ethylene biosynthesis

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Horticultural Plant Journal 2023年第4期9卷 659-669页

作者： Tong li Xiao Zhang Yun Wei Yaxiu Xu Weiting liu hongjian li Guangxin Yang Aide Wang Xiaoxue Wang Rice Research Institute Shenyang Agricultural UniversityShenyangLiaoning 110866China College of Horticulture Shenyang Agricultural UniversityShenyangLiaoning 110866China liaoning Institute of Pomology XiongyueLiaoning115009China

Apple(Malus domestica)fruit generally undergoes a *** its ripening process,there is a peak in ethylene release and its firmness simultaneously *** more in-depth research into the mechanism of climacteric-type fruit ripening is being carried out,some aspects remain *** this study,we compared the transcriptomes of 0-Pre and 15-Post(pre-and post-climacteric fruit),and 15-Post and 15-MCP[fruit treated with 1-MCP(1-methylcyclopropene)].Various transcription factors,such as MADS-box,ERF,NAC,Dof and SHF were identified among the DEGs(differential gene expressions).Furthermore,these transcription factors were selected for further validation analysis by ***,yeast one hybrid(Y1H),β-glucuronidase(GUS)transactivation assay and dual-luciferase reporter assay showed that MdAGL30,MdAGL104,MdERF008,MdNAC71,MdDof1.2,MdHSFB2a and MdHSFB3 bound to MdACS1 promoter and directly regulated its transcription,thereby regulating ethylene biosynthesis in apple *** results provide useful information and new insights for research on apple fruit ripening.

关键词： Apple RNA-Seq Fruit ripening Ethylene Transcription factor