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Hardy-type inequalities on strong and weak Orlicz-Lorentz spaces

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Science China Mathematics 2012年第12期55卷 2493-2505页

作者： li hongliang Department of Mathematics Zhejiang International Studies University Hangzhou 310012 China

In the present paper, the characterization of strong-type modular inequality ∫ 0 ∞φ(Sf (t))w(t)dt≤∫0∞ φ(Cf (t))w(t)dt, f↓ is given, where φ∈Δ' and S is a Hardy operator. Furthermore, the equivalent conditions of modular inequalities and norm inequalities related to weak Orlicz-Lorentz spaces are researched. We also explore the conditions for Orlicz-Lorentz spaces and weak Orlicz-Lorentz spaces to be normable. Finally, the weak boundedness of certain Hardy-type operators on Orlicz-Lorentz spaces is studied.

关键词： Orlicz-Lorentz spaces weak Orlicz-Lorentz spaces Hardy operator modular inequalities norminequalities

Convolutions, Tensor Products and Multipliers of the Orlicz-Lorentz Spaces

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Chinese Annals of Mathematics,Series B 2015年第3期36卷 467-484页

作者： hongliang li Jiecheng CHEN Department of Mathematics Zhejiang International Studies University Department of Mathematics Zhejiang Normal University

In this paper, the authors first give the properties of the convolutions of Orlicz- Lorentz spaces Aφ1,w and Aφ2,w on the locally compact abelian group. Secondly, the authors obtain the concrete representation as function spaces for the tensor products of Orlicz-Lorentz spaces Aφ1,w and Aφ2,w, and get the space of multipliers from the space Aφ1,w to the space Mφ2.w. Finally, the authors discuss the homogeneous properties for the Orlicz-Lorentz space Aφ,w^p,q.

关键词： Orlicz-Lorentz spaces Convolution Tensor products Multipliers Hardyoperator

THE QUADRATIC SPECHT TRIANGLE

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Journal of Computational Mathematics 2020年第1期38卷 103-124页

作者： hongliang li Pingbing Ming Zhongci Shi Department of Mathematics Sichuan Normal UniversityChengdu 610066China The State Key Laboratory of Scientific and Engineering Computing Academy of Mathematics and Systems ScienceChinese Academy of SciencesNo.55East Road ZhongGuanCunBeijing 100190China

We propose a class of 12 degrees of freedom triangular plate bending elements with quadratic rate of *** may be viewed as the second order Specht triangle,while the Specht triangle is one of the best first order plate bending *** convergence result is proved under minimal smoothness assumption on the *** results for both the smooth solution and nonsmmoth solution confirm the theoretical prediction.

关键词： Specht triangle Plate bending element Basis functions

Analysis on Nonlinear Dynamic Properties of Dual-Rotor System

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Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 46-54页

作者： hongliang li Yushu Chen School of Astronautics Harbin Institute of Technology

In order to clarify the effects of support structure on a dual-rotor machine,a dynamic model is established which takes into consideration the contact force of ball bearing and the cubic stiffness of elastic support. Bearing clearance,Hertz contact between the ball and race and the varying compliance effect are included in the model of ball bearing. The system response is obtained through numerical integration method,and the vibration due to the periodic change of bearing stiffness is investigated. The motions of periodic,quasiperiodic and even chaotic are found when bearing clearance is used as control parameter to simulate the response of rotor system. The results reveal two typical routes to chaos: quasi-periodic bifurcation and intermittent bifurcation. Large cubic stiffness of elastic support may cause jump and hysteresis phenomena in resonance curve when rotors run at the critical-speed region. The modeling results acquired by numerical simulation will contribute to understanding and controlling of the nonlinear behaviors of the dual-rotor system.

关键词： dual-rotor system ball bearing elastic support nonlinear dynamics bifurcation chaos

Periodic response analysis of a misaligned rotor system by harmonic balance method with alternating frequency/time domain technique

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Science China(Technological Sciences) 2016年第11期59卷 1717-1729页

作者： li hongliang CHEN YuShu HOU Lei ZHANG ZhiYong School of Astronautics Harbin Institute of Technology School of Science Nanjing University of Science and Technology

A dynamic model is established for an offset-disc rotor system with a mechanical gear coupling, which takes into consideration the nonlinear restoring force of rotor support and the effect of coupling misalignment. Periodic solutions are obtained through harmonic balance method with alternating frequency/time domain(HB-AFT) technique, and then compared with the results of numerical simulation. Good agreement confirms the feasibility of HB-AFT scheme. Moreover, the Floquet theory is adopted to analyze motion stability of the system when rotor runs at different speed intervals. A simple strategy to determine the monodromy matrix is introduced and two ways towards unstability are found for periodic solutions: the period doubling bifurcation and the secondary Hopf bifurcation. The results obtained will contribute to the global response analysis and dynamic optimal design of rotor systems.

关键词： rotor system coupling misalignment harmonic balance method with alternating frequency/time domain(HB-AFT) technique Floquet theory stability bifurcation

Homogenizing the sulfonic acid distribution of DMF-modified PEDOT:PSS films and perovskite solar cells

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Journal of Energy Chemistry 2019年第5期28卷 71-77页

作者： hongliang li Cuiling Zhang Yunping Ma Zhiqiang li Ying Xu Yaohua Mai Institute of Photovoltaics College of Physics Science and TechnologyHebei UniversityBaoding 071002HebeiChina Institute of New Energy Technology College of Information Science and TechnologyJinan University.Guangzhou 510632GuangdongChina

Inverted perovskite solar cells using pristine PEDOT:PSS as the hole-transporting layer (HTL) have been widely studied for its less hysteresis and low-temperature preparation technologies. However, this device suffers from an inferior open-circuit voltage (VOC) and stability problems. Several attempts have made on film formation and interface engineering to improve the efficiency. Modification proved beneficial to decrease energy offset at the interface between the HTL layer and the adjacent perovskite layer. In this paper, modification PEDOT:PSS layers were realized with a dimethyl formamide (DMF) solvent. The sulfonic acid distribution was homogenized in the normal directi on after modification. The work function of the modified PEDOT:PSS layers increased from 4.71 to 5.07eV, and the conductivity of modified PEDOT:PSS increased from 3×10^-4 to 0.45 S/cm. The as-deposited perovskite films were more uniform with larger grain sizes and less pinholes, resulting in an improved VOC from 0.93 to 1.048 V, while the efficiency was increased from 11.5% to 16.8%. Solar cells without encapsulation under the 50 h and 50% humidity aging test showed 7% degradation of fill factor (FF) with 50 v/v% PEDOT:PSS layer, while the fill factor decreased 11.2% in the 0 v/v% PEDOT:PSS layer, respectively.

关键词： Modification Hysteresis Inverted perovskite solar cells (PSCs)

Effects of minor Sr addition on as-cast microstructure and mechanical properties of a Mg-3Sn-2Ca(wt.%) magnesium alloy

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China Foundry 2014年第2期11卷 108-114页

作者： Yang Mingbo li hongliang Duan Chengyu School of Materials Science & Engineering Chongqing University of Technology Key Laboratory of Manufacture and Test Techniques for Automobile Parts Ministry of EducationChongqing University of Technology

Minor Sr was introduced to the Mg-3Sn-2Ca （wt.%） alloy in this paper, and the effects of minor Sr addition on the as-cast microstructure and mechanical properties of the Mg-3Sn-2Ca （wt.%） alloy were investigated by using of optical and electron microscopies, differential scanning calorimetry （DSC） analysis, and tensile and creep tests. The results indicate that, after adding 0.034wt.%, 0.065wt.% or 0.10wt.% Sr to the Mg- 3Sn-2Ca alloy, the morphology of the primary CaMgSn phase changes from the initial coarse needle-like net to relatively fine short block and/or particle-like shapes. At the same time, the additions of 0.034wt.% or 0.065wt.% Sr suppress the formation of the primary CaMgSn phase, and the addition of 0.10wt.% Sr not only suppresses the formation of the primary and eutectic CaMgSn phases but also promotes the formation of Mg2Ca phase. Furthermore, the addition of minor Sr to the Mg-3Sn-2Ca alloy can improve the tensile properties of the alloy both at room temperature and 150 ℃. The creep property of the Mg-3Sn-2Ca alloy at 150 ~C is also improved by the additions of 0.034wt.% and 0.065wt.% Sr; however, the addition of 0.10wt.% Sr is not beneficial to the creep properties of the Mg-3Sn-2Ca alloy.

关键词： magnesium alloys Mg-Sn-Ca alloys CaMgSn phase Sr addition

Stable ZnO/ionic liquid hybrid materials: novel dual-responsive superhydrophobic layers to light and anions

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Science China Chemistry 2014年第7期57卷 1002-1009页

作者： li hongliang XIN BingWei FENG Lei HAO JingCheng Key Laboratory of Coordination Chemistry and Functional Materials Dezhou University Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials Shandong University

Novel dual-responsive superhydrophobic hybrid materials, ZnO/SAMs （self-assembled monolayers） of ionic liquids （ILs） with different counter-anions （I^-, BF4^-, PF6^- and Tf2N^-）, were synthesized and characterized. ZnO nanoparticles were first deposited on glass surfaces to produce roughness. Next, SAMs of fluorinated-alkyl-3-（3-triethoxysilylpropyl）-4,5-dihydro-imidazoliumiodide （abb. [C8Ftespim]I） were grafted onto these surfaces via -Si-O- covalent bonds using self-assembly technique. The I- ion could be subsequently exchanged with BF4, PF6-or Tf2N- through a simple aqueous anion-exchange reaction. The ZnO/ILs hybrid layers were characterized by atomic-force microscopy （AFM）, scanning-electron microscopy （SEM） and X-ray photoelectron spectroscopy （XPS）. Their wettability was estimated through the measurements of static and dynamic contact angles （CAs）. Compared to corresponding films of ZnO/[CsFtespim]I with CAs 140.7° ±2.0°, films of ZnO/[CsFtespim]PF6 and ZnO/[CsFtespim]Tf2N showed CAs with 154.0° ± 2.0° and 152.0° ± 2.0°, respectively that remained for a long time. This result suggests that anion-exchange can afford superhydrophobic materials. In addition, the wettability of ZnO/[CsFtespim]X hybrid layers can be reversibly switched by altering ultraviolet （UV） irradiation and dark storage, which shows a photo-induced reversible switch of wettability. The synergistic action of ZnO nanoparticles and SAMs of ILs produced light-anion dual-responsive superhydrophobic materials with ideal stability.

关键词： ZnO/IL hybrid materials dual-responsive surface SAMs of ionic liquid wettability ZnO nanoparticles

Genome-wide identification of apple auxin receptor family genes and functional characterization of MdAFB1

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Horticultural Plant Journal 2023年第4期9卷 645-658页

作者： Zhiwen Qiao hongliang li Xiaofei Wang Xinglong Ji Chunxiang You National Key Laboratory of Crop Biology National Research Center for Apple Engineering and TechnologyShandong Agricultural UniversityTai'anShandong 271018China Qingdao Agricultural University QingdaoShandong 266109China

The auxin receptor(TIR1/AFBs)family encodes the F-box protein subunit,which is involved in the formation of the E3 ubiquitin ligase SCFTIR1/AFBs complex,a key component of the auxin signaling ***,there are few studies on the auxin receptor family in apple(Malus×domestica).In this study,eight MdAFBs were identified,and phylogenetic analysis showed that they were classified into four groups and distributed on eight ***,a comprehensive analysis of the MdAFB gene family was conducted to identify cis-acting elements,gene structures,protein structures,aligned sequences,conserved motifs,conserved amino acids,and the protein–protein interaction *** results of yeast two-hybrid assays showed that MdAFB1 interacted with three auxin repressor *** results of qRT-PCR showed that MdAFB1 responded to osmotic and salt *** overexpression of MdAFB1 increased osmotic and salt resistance in apple calli,and the ectopic expression of MdAFB1 enhanced osmotic and salt tolerance in *** study provided a basis for the identification of auxin receptor genes in apple and their functions in mediating osmotic and salt stress.

关键词： Malus×domestica Auxin receptor TIR1/AFB Genome-wide analysis Abiotic stress