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Dynamic Performance Investigation of A Spar-Type Floating Wind Turbine Under Different Sea Conditions

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China Ocean Engineering 2018年第3期32卷 256-265页

作者： WANG han HU zhi-qiang MENG Xiang-yin State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai 200240China School of Engineering Newcastle UniversityNewcastle upon TyneNE1 7RU UK

Both numerical calculation and model test are important techniques to study and forecast the dynamic responses of the floating offshore wind turbine(FOWT). However, both the methods have their own limitations at present. In this study, the dynamic responses of a 5 MW OC3 spar-type floating wind turbine designed for a water depth of 200 m are numerically investigated and validated by a 1:50 scaled model test. Moreover, the discrepancies between the numerical calculations and model tests are obtained and discussed. According to the discussions, it is found that the surge and pitch are coupled with the mooring tensions, but the heave is independent of them. Surge and pitch are mainly induced by wave under wind wave conditions. Wind and current will induce the low-frequency average responses, while wave will induce the fluctuation ranges of the responses. In addition, wave will induce the wavefrequency responses but wind and current will restrain the ranges of the responses.

关键词： spar-type floating wind turbine dynamic response numerical calculation model test time domain analysis frequency domain analysis

Curvature-aware simplification for point-sampled geometry

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Journal of Zhejiang University-Science C(Computers and Electronics) 2011年第3期12卷 184-194页

作者： zhi-xun SU zhi-yang LI Yuan-di ZHAO Jun-jie cao School of flCathematical Sciences Dalian University of Technology Dalian 116024 China

We propose a novel curvature-aware simplification technique for point-sampled geometry based on the locally optimal projection(LOP) *** algorithm includes two new ***,a weight term related to surface variation at each point is introduced to the classic LOP *** produces output points with a spatially adaptive ***,for speeding up the convergence of our method,an initialization process is proposed based on geometry-aware stochastic *** to the initialization,the relaxation process achieves a faster convergence rate than those initialized by uniform *** simplification method possesses a number of distinguishing *** particular,it provides resilience to noise and outliers,and an intuitively controllable distribution of ***,we show the results of our approach with publicly available point cloud data,and compare the results with those obtained using previous *** method outperforms these methods on raw scanned data.

关键词： Point-sampled geometry Particle simulation Locally optimal projection Simplification

Paraelectric Doping Simultaneously Improves the Field Frequency Adaptability and Dielectric Properties of Ferroelectric Materials:A Phase-Field Study

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Computers, Materials & Continua 2024年第10期81卷 213-228页

作者： zhi Wang Jinming cao Zhonglei Liu Yuhong Zhao School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan030051China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang110004China

Recent years,the polarization response of ferroelectrics has been entirely ***,it is found that the polarization may disappear gradually with the continually applied of electric *** this paper,taking K0.48Na0.52NbO3(KNN)as an example,it was demonstrated that the residual polarization began to decrease when the electric field frequency increased to a certain extent using a phase-field *** results showed that the content of out-of-plane domains increased first and then decreased with the increase of applied electric field frequency,the maximum polarization disappeared at high frequencies,and the hysteresis loop became *** order to further study the abnormal changes of hysteresis loops of ferroelectrics under high electric field frequency,we analyzed the hysteresis loop and dielectric response of solid solution 0.1SrTiO_(3)-0.9K_(0.48)Na_(0.52)NbO_(3).It was found that the doped hysteresis loop maintained its shape at higher frequency and the dielectric constant *** kind of doping has a higher field frequency adaptability,which has a key guiding role in improving the dielectric properties of ferroelectric thin films and expanding the frequency application range of ferroelectric nano memory。

关键词： Ferroelectric ceramics dielectric properties electric field frequency doping phase field method

Topology of charged AdS black hole in restricted phase space

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Chinese Physics C 2024年第9期48卷 291-299页

作者： han Wang Yun-zhi Du College of Mathematics and Statistics Shanxi Datong UniversityDatong 037009China Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

The local topological properties of black hole systems can be expressed through winding numbers as *** date,AdS black hole thermodynamics are often depicted by the dual parameters of(T,S),(P,V),(Φ,Q) in the extended phase space,while there have been several studies on the black hole thermodynamics in the restricted phase *** this paper,we analyze the topological properties of charged AdS black holes in the restricted phase space under the higher-dimension and higher-order curvature gravity *** results show that the topological number of the charged black hole in the same canonical ensembles is a constant and is independent of the concrete dual thermodynamical ***,the topological number in the grand canonical ensemble is different from that in the canonical ensemble for the same black hole ***,these results are independent of dimension d and highe st order k of the Lanczos-Lovelock densities.

关键词： topology phase transition black hole

Determination of Forward Slip Coefficient During Heavy Rail Rolling Using Universal Mill

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Journal of Iron and Steel Research International 2008年第2期15卷 32-38页

作者： DONG Yong-gang ZhanG Wen-zhi cao Hui College of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China Institute of Design and Research Anshan Iron and Steel Group Corporation Anshan 114021 Liaoning China

The forward slip coefficient is one of the most important parameters for heavy rail rolling using universal *** simplifying the theoretical model,the vertical roll with box pass was simplified as an equivalent flat roll ***,the neutral angle of horizontal roll and vertical roll was ***,the equation of neutral line on the flank of horizontal roll was determined and the forward slip coefficient of the web was derived according to different positions of neutral ***,the forward slip coefficient of the top and base of heavy rail was *** theoretical results were basically in agreement with the experimental data.

关键词： heavy rail forward slip neutral angle neutral line universal mill

Melanin,DNA replication,and autophagy affect appressorium development in Setosphaeria turcica by regulating glycerol accumulation and metabolism

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Journal of Integrative Agriculture 2022年第3期21卷 762-773页

作者： GUO Xiao-yue LIU Ning LIU Bing-hui ZHOU Li-hong cao zhi-yan han Jian-min DONG Jin-gao State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology/Mycotoxin and Molecular Plant Pathology Laboratory Hebei Agricultural UniversityBaoding 071001P.R.China

Setosphaeria turcica(*** turcicum)is the pathogenic fungus of maize(Zea mays)that causes northern leaf blight,which is a major maize disease *** appressoria are highly specialized infection structures formed by germinated conidia of *** that infect maize *** appressorium penetrates the plant cuticle by generating turgor,and glycerol is known to be the main source of the ***,the infection position penetrated by the appressorium on maize leaves was investigated,most of the germinated conidia entered the leaf interior by directly penetrating the epidermal cells,and the appressorium structure was necessary for the infection,whether it occurred through epidermal cells or ***,to investigate the effects of key factors in the development of the appressorium,we studied the effects of three inhibitors,including a melanin inhibitor(tricyclazole,TCZ),a DNA replication inhibitor(hydroxyurea,HU),and an autophagy inhibitor(3-methyladenine,3-MA),on appressorium turgor and glycerol *** results,appressorium turgor pressure and glycerol concentration in the appressorium reached their highest levels at the mature stage of the appressorium under the control and inhibitor *** three inhibitors had the greatest effects on appressorium turgor pressure at this *** and liposomes are the main substances producing *** was also found inhibitors affected the distribution of glycogen and liposomes,which were detected in the conidia,the germ tube,and the appressorium during appressorium *** study provides profound insight into the relationship between appressorium turgor pressure and glycerol content,which was affected by the synthesis of melanin,DNA replication,and autophagy in the developing appressorium during a *** infection.

关键词： melanin DNA replication autophagy appressorium development Setosphaeria turcica glycerol

Unconventional superfluidity of superconductivity on Penrose lattice

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Science China(Physics,Mechanics & Astronomy) 2023年第9期66卷 8-14页

作者： Yu-Bo Liu zhi-Yan Shao Ye cao Fan Yang School of Physics Beijing Institute of TechnologyBeijing 100081China

Using the attractive Hubbard model as an example,we theoretically investigate the gap function,superfluid density,and superconductivity(SC)transition temperature on the semiperiodic Penrose ***,we clarify that the gap function,density of states,and superfluid density positively correlate to the extended degree of single-particle states around the Fermi ***,we confirm that the paramagnetic component of the superfluid density does not decay to zero in the thermodynamic limit,which is completely diferent from periodic *** of the scaling,the diference between diamagnetic and paramagnetic currents remains stable,consistent with recent experimental results showing that although the superfluid density is lower than that of a periodic system,the system has bulk ***,we find that the superfluid density and SC transition temperature can be boosted with the increase in disorder strength,which should be general to quasicrystal but unusual to periodic systems,reflecting the interplay between the underlying geometry and disorder.

关键词： quasicrystals superfluid density extended degree

An unexpected approach to enhance specific surface area and mesopore amount of polyaniline by Zn doping

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Rare Metals 2024年第9期43卷 4585-4594页

作者： zhi-Da Zhu Yu-Zhe han Xiao-Bi Jing School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

Poly-p-anisidine could be easily fabricated via the oxidative polymerization reaction of p-anisidine using H_(2)O_(2)as the green *** was unexpectedly found that zinc doping could significantly improve the adsorption ability of the material versus heavy metals such as Pb,Cu,Pd,Ag and *** of nitrogen adsorption–desorption experiments demonstrated that Zn doping could enhance the specific surface area and mesopore amount of the prepared material,which might facilitate its absorption to *** work not only provides a novel material for the treatment of heavy metal-polluted water but also leads to a nice mesoporous catalyst support for environment protection and organic synthesis,*** Zn-doped poly-panisidine can be employed as the catalyst support to prepare Cu@PANI-OMe/Zn or Pd@PANI-OMe/Zn for the oxidative degradation reaction of phenol or Suzuki–Miyaura coupling reactions,*** discloses a new strategy for fabricating the mesoporous polyaniline materials with profound application potential.

关键词： Surfaces Porous materials Rare metal concentration Adsorption Catalysis

Chromatin conformation of human oral epithelium can identify orofacial cleft missing functional variants

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International Journal of Oral Science 2022年第4期14卷 497-508页

作者： Yao Xiao Shengbo Jiao Miao He Da Lin Huanyan Zuo Jiahao han Yonghua Sun Gang cao zhi Chen Huan Liu The State Key Laboratory Breeding Base of Basic Science of Stomatology&Key Laboratory for Oral Biomedicine of Ministry of Education School and Hospital of StomatologyWuhan University237 Luoyu RoadWuhanChina Department of Stomatology Nanfang HospitalSouthern Medical UniversityGuangzhouChina State Key Laboratory of Freshwater Ecology and Biotechnology Hubei Hongshan LaboratoryInstitute of HydrobiologyInnovation Academy for Seed DesignChinese Academy of SciencesWuhanChina College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijingChina State Key Laboratory of Agricultural Microbiology Huazhong Agricultural UniversityWuhanChina Taikang Center for Life and Medical Sciences Wuhan UniversityWuhanChina

Genome-wide association studies(GWASs) are the most widely used method to identify genetic risk loci associated with orofacial clefts(OFC). However, despite the increasing size of cohort, GWASs are still insufficient to detect all the heritability,suggesting there are more associations under the current stringent statistical threshold. In this study, we obtained an integrated epigenomic dataset based on the chromatin conformation of a human oral epithelial cell line(HIOEC) using RNA-seq, ATAC-seq,H3K27ac Ch IP-seq, and DLO Hi-C. Presumably, this epigenomic dataset could reveal the missing functional variants located in the oral epithelial cell active enhancers/promoters along with their risk target genes, despite relatively less-stringent statistical association with OFC. Taken a non-syndromic cleft palate only(NSCPO) GWAS data of the Chinese han population as an example, 3664 SNPs that cannot reach the strict significance threshold were subjected to this functional identification *** total, 254 potential risk SNPs residing in active cis-regulatory elements interacting with 1 718 promoters of oral epitheliumexpressed genes were screened. Gapped k-mer machine learning based on enhancers interacting with epithelium-expressed genes along with in vivo and in vitro reporter assays were employed as functional validation. Among all the potential SNPs, we chose and confirmed that the risk alleles of rs560789 and rs174570 reduced the epithelial-specific enhancer activity by preventing the binding of transcription factors related to epithelial development. In summary, we established chromatin conformation datasets of human oral epithelial cells and provided a framework for testing and understanding how regulatory variants impart risk for clefts.

关键词： epithelium functional variants