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Choroidal thickness in pregnant women : a cross-sectional study

International Journal of Ophthalmology(English edition) 2016年第8期9卷 1200-1206页

作者： Ru Liu Guo-Ping Kuang Di-xian luo Xiao-He Lu Department of Ophthalmology Zhujiang Hospital of Southern Medical University Department of Ophthalmology the First People's Hospital of Chenzhou Institute of Translational Medicine the First People's Hospital of Chenzhou

AIM: To investigate choroidal thickness in pregnant women and compare the measurements with those of normal nonpregnant women. METHODS: Using enhanced depth imaging optical coherence tomography (EDI-OCT), choroidal thickness was measured at the fovea and at 1 mm and 3 mm superior, inferior, temporal, and nasal to the fovea in both healthy pregnant women and nonpregnant women. Pearson correlation analysis was performed to evaluate the relationships between subfoveal choroidal thickness (SFCT) and the demographic and ocular parameters. Pooled odds ratio (OR) and 95% confidence interval (CI) were calculated using fixed-effects model when Meta analyses were conducted. RESULTS: Comparison of choroidal thickness between the groups showed that it was significantly greater in healthy pregnant women's eyes than in normal nonpregnant women's eyes at all locations except at 3 mm superior and 3 mm temporal from the fovea (P<0.05). The mean SFCT was 344.13 +/- 50.94 mu m in healthy pregnant women's eyes and 315.03 +/- 60.57 mu m in normal nonpregnant women's eyes, with a statistically significant difference (P=0.008). Pearson correlation analysis showed that age and axial length were significantly related to SFCT in healthy pregnant women, normal nonpregnant women, and all subjects. The results of our cross-sectional study were consistent with the results of the further Meta analysis, with a pooled weighted mean difference (WMD) of 33.66 mu m (95% CI: 26.16 to 41.15) for SFCT. CONCLUSION: Our results, along with the comprehensive Meta-analysis, suggest that choroidal thickness in healthy pregnant women is greater than that in normal nonpregnant women.

关键词： choroidal thickness pregnant optical coherence tomography

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Structural engineering of hard carbon through spark plasma sintering for enhanced sodium-ion storage

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Rare Metals 2024年第9期43卷 4274-4285页

作者： Hao-Ming Xiao Heng Zheng Ping Yuan Jun-Hui luo Lin-Lin Shen Jie-Feng Tan xian-You luo De Li Yong Chen Guangdong Key Laboratory for Hydrogen Energy Technologies School of Materials Science and Hydrogen EnergyFoshan UniversityFoshan 528000China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti ResourcesHainan UniversityHaikou 570228China

Hard carbon(HC)has emerged as one of the superior anode materials for sodium-ion batteries(SIBs),with its electrochemical performance significantly influenced by the presence of oxygen functional groups and its closed pore ***,current research on the structural adjustment of these oxygen functional groups and the closed pore architecture within HC remains ***,energy-efficient and contamination-free spark plasma sintering technology was employed to tune the structure of coconut-shell HC,resulting in significant adjustments to the content of carboxyl(decreasing from 5.71 at%to 2.12 at%)and hydroxyl groups(decreasing from 7.73 at%to 6.26 at%).Crucially,these modifications reduced the irreversible reaction of oxygen functional groups with Na^(+).Simultaneously,a substantial number of closed pores with an average diameter of 1.22 nm were generated within the HC,offering an ideal environment for efficient Na^(+)*** structural changes resulted in a remarkable improvement in the electrochemical performance of the modified *** reversible specific capacity of the modified HC surged from 73.89 mAh·g^(-1)to an impressive 251.97 m Ah·g^(-1)at a current density of 50 mA·g^(-1).Even at 400 mA·g^(-1),the reversible specific capacity increased significantly from 14.55 to 85.44 mAh·g^(-1).Hence,this study provides a novel perspective for designing tailored HC materials with the potential to develop high-performance SIBs.

关键词： Hard carbon Spark plasma sintering Sodiumion batteries Closed pores Oxygen functional groups

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Hydro-mechanical modeling of impermeable discontinuity in rock by extended finite element method

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Journal of Central South University 2015年第11期22卷 4337-4346页

作者：郑安兴罗先启 School of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University

The extended finite element method(XFEM) is a numerical method for modeling discontinuities within the classical finite element framework. The computation mesh in XFEM is independent of the discontinuities, such that remeshing for moving discontinuities can be overcome. The extended finite element method is presented for hydro-mechanical modeling of impermeable discontinuities in rock. The governing equation of XFEM for hydraulic fracture modeling is derived by the virtual work principle of the fracture problem considering the water pressure on crack surface. The coupling relationship between water pressure gradient on crack surface and fracture opening width is obtained by semi-analytical and semi-numerical method. This method simplifies coupling analysis iteration and improves computational precision. Finally, the efficiency of the proposed method for modeling hydraulic fracture problems is verified by two examples and the advantages of the XFEM for hydraulic fracturing analysis are displayed.

关键词： extended finite element method crack hydraulic fra

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M6A modification of circNSUN2 promotes colorectal liver metastasis

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Genes & Diseases 2021年第1期8卷 6-7页

作者： Rong-Zhang He Jing Jiang Di-xian luo Department of Clinical Pharmacology Xiangya HospitalCentral South UniversityChangshaHunan410078PR China Translational Medicine Institute National&Local Joint Engineering Laboratory for High-through Molecular Diagnosis TechnologyCollaborative Research Center for Post-doctoral Mobile Stations of Central South UniversityAffiliated the First People’s Hospital of ChenzhouUniversity of South ChinaChenzhouHunan423000PR China Center for Clinical Pathology The First People’s Hospital of ChenzhouUniversity of South ChinaChenzhouHunan423000PR China

Circular RNAs(circRNAs)are playing emerging role in the pathogenesis of cancers,but the mechanisms still *** the recent issue of the Nature Communications,Chen and colleagues have demonstrated that YTHDC1 facilitates N6-methyladenosine modified circNSUN2 cytoplasmic export and the circNSUN2/IGF2BP2/HMGA2 complex stabilizes HMGA2 to promote colorectal liver *** discoveries not only expand our understanding of circRNAs biology in tumor,but also demonstrate that m6A modification plays a key role for circRNAs in RNA ***,these findings indicate that circRNAs may be a new approach for therapeutic target of cancers.

关键词： CircRNAs Colorectal carcinoma IGF2BP2 Metastasis N6-methyladenosine

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High temperature tensile properties,fracture behaviors and nanoscale precipitate variation of an Al-Zn-Mg-Cu alloy

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Progress in Natural Science:Materials International 2020年第1期30卷 63-73页

作者： Pan Dai xian luo Yanqing Yang Zongde Kou Bin Huang Jinxin Zang Jigang Ru State Key Laboratory of Solidification Processing Northwestern Polytechnical University Beijing Institute of Aeronautical Materials

In order to assess Al-Zn-Mg-Cu alloys as potential high temperature structural materials,the hardness,tensile properties and fracture behaviors of 7085 Al alloy were investigated at various temperatures from room temperature to 175℃.High-resolution transmission electron microscopy was used to investigate the evolutions of precipitates at different temperatures,particularly on the relationship between microstructural evolution and tensile *** results reveal that both the microstructure and mechanical properties of the alloy are quite sensitive to the environmental *** the temperature increases,the hardness and strength decrease while the elongation and reduction of area *** tensile testing temperature rises,the strain hardening exponent(n) decreases due to the thermal softening *** fracture mode of the alloy transforms from mixture of intergranular and transgranular fracture to completely transgranular dimples when tensile testing temperature reaches 150℃.The precipitate sequence during high temperature tests is coincident with that of *** the increase of tensile testing temperature,the mean precipitate radius grows larger,and the distribution of grain boundary precipitates transforms from continuous to discontinuous.

关键词： 7085 Al alloy Microstructure evolution Tensile strength Fracture mode

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Effectively enhancing recovery of fine spodumene via aggregation flotation

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Rare Metals 2020年第3期39卷 316-326页

作者： He-Peng Zhou Jie Hu Yong-Bing Zhang Yi-Jun Cao xian-Ping luo Xue-Kun Tang School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou221116China Faculty of Resource and Environmental Engineering Jiangxi University of Science and TechnologyGanzhou341000China Chinese National Engineering Research Center of Coal Preparation and Purification China University of Mining and TechnologyXuzhou221116China Henan Province Industrial Technology Research Institute of Resources and Materials Zhengzhou UniversityZhengzhou450001China Western Mining Co. Ltd.Xining810006China

The effects of shear strength on aggregation flotation processes for fine spodumene(particle size less than 19μm)were investigated in this *** oleate was used as a surfactant and *** shear strength was controlled by varying the agitation speed of a selfmade stirring *** aggregation process was studied by measuring the continuous transformations in the size distribution and shape of *** results showed that as the shear strength increased,the distribution of fine spodumene transformed from bimodal to unimodal *** flocs tended to bridge more branches with a high shear strength and form globule-like flocs with very high *** parameter"aggregation degree"was introduced to evaluate the aggregation process as a function of shear *** flotation rate of flocs formed with different shear strengths was also *** results demonstrated that the flotation rate was closely related to shear strength and that there was a close correlation between this and aggregation *** results could be used to guide the actual production of fine particles via shear aggregation flotation.

关键词： Shear strength Fine spodumene Flotation rate Shear aggregation Sodium oleate

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Unsteady Cavitating Flow around a Hydrofoil Simulated Using the Partially-Averaged Navier-Stokes Model

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Chinese Physics Letters 2012年第7期29卷 198-202页

作者： JI Bin luo xian-Wu WU Yu-Lin XU Hong-Yuan State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084

Numerical simulations of unsteady cavitating flow around a NACA66-mod hydrofoil were performed using the partially-averaged Navier-Stokes method with different values of the resolution control parameters (f k =1.0-0.2,fε =1).With decreasing fk,the predicted cavitating flow becomes unsteady as the time-averaged turbulent viscosity at the rear part of the attached cavity is gradually *** fk =0.9 and 0.8,the cavity becomes unstable and its length dramatically expands and shrinks,but the calculation fails to predict the vapor cloud shedding behavior observed *** smaller fk less than 0.7,the cloud shedding behavior is simulated numerically and the predicted cavity shedding frequency *** fk =0.2,the whole cavitating flow evolution can be reasonably reproduced including the cavity growth/destabilization observed *** reentrant flow along the suction surface of the hydrofoil is the main trigger to cause the vapor cloud *** wall pressure along the hydrofoil surface oscillates greatly due to the dynamic cavity *** the simulations and experiments,it is confirmed that for the PANS method,resolution control parameters of fk =0.2and fε =1 are recommended for numerical simulations of unsteady cavitating ***,the present study shows that the PANS method is an effective approach for predicting unsteady cavitating flow over hydrofoils.

关键词： unsteady Navier averaged

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Cloning and Expression Analysis of cDNA Encoding Or83b-Like Receptor from Helicoverpa assulta

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Agricultural Sciences in China 2010年第7期9卷 1001-1007页

作者： QIAO Qi LI Hai-chao YUAN Guo-hui GUO xian-ru luo Mei-hao College of Plant Protection Henan Agricultural University Zhengzhou 450002 P.R. China

An Or83b-like receptor gene was cloned from antennae of Helicoverpa assulta（Guenée） by using reverse transcription polymerase chain reaction（RT-PCR） and rapid amplification of cDNA ends（RACE）.Sequence analysis revealed that the transcript of the Or83b-like receptor gene from *** consists of 1 946 nucleotides and the open reading frame（ORF） encodes a peptide of 473 amino acids with 7 putative transmembrane *** analysis suggested that amino acid sequence of Or83b-like receptor from *** shares high identity with other Or83b family receptors and this gene was hence named as *** expression analysis showed that the HassOr83b transcript is clearly observed in the antennae,labial palps and proboscises,but not in bodies,wings and *** further development expression analysis suggested HassOr83b is also expressed in several preadult stages,including early-stage larvae,late-stage larvae and pupae,but not in *** nucleic acid（LNA）-based in situ hybridization of antennal section indicated that HassOr83b is expressed in a very large number of antennal cells,which suggests that HassOr83b may play a special role in olfaction in ***.

关键词： Helicoverpa assulta Or83b-like receptor gene cloning expression pattern in situ hybridization

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Numerical analyses of ventilated cavitation over a 2-D NACA0015 hydrofoil using two turbulence modeling methods

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Journal of Hydrodynamics 2018年第2期30卷 345-356页

作者： Dan-dan Yang An Yu Bin Ji Jia-jian Zhou xian-wu luo State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Beijing Key Laboratory of CO2 Utilization and Reduction Technology Department of Energy and Power Engineering Tsinghua University Beijing 100084 China School of Power and Mechanical Engineering Wuhan University Wuhan 430072 China Marine Design and Research Institute of China Shanghai 200011 China

The present paper studies the ventilated cavitation over a NACA0015 hydrofoil by numerical methods. The corresponding cavity evolutions are obtained at three ventilation rates by using the level set method. To depict the complicated turbulent flow structure, the filter-based density corrected model（FBDCM） and the modified partially-averaged Navier-Stokes（MPANS） model are applied in the present numerical analyses. It is indicated that the predicted results of the cavitation shedding dynamics by both turbulence models agree fairly well with the experimental data. It is also noted that the shedding frequency and the super cavity length predicted by the MPANS method are closer to the experiment data as compared to that predicted by the FBDCM model. The simulation results show that in the ventilated cavitation, the vapor cavity and the air cavity have the same shedding frequency. As the ventilated rate increases, the vapor cavity is depressed rapidly. The cavitation-vortex interaction in the ventilated cavitation is studied based on the vorticity transport equation（VTE） and the Lagrangian coherent structure（LCS）. Those results demonstrate that the vortex dilatation and baroclinic torque terms are highly dependent on the evolution of the cavitation. In addition, from the LCSs and the tracer particles in the flow field, one may see the process from the attached cavity to the cloud cavity.

关键词： Ventilated cavitation level set method filter-based density corrected model (FBDCM) modified partially-averaged Navier-Stokes (MPANS) model Lagrangian coherent structure (LCS)

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Excellent strength-ductility synergy properties of gradient nano-grained structural CrCoNi medium-entropy alloy

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Journal of Materials Science & Technology 2022年第17期112卷 195-201页

作者： Wenjie Lu xian luo Dou Ning Miao Wang Chao Yang Miaoquan Li Yanqing Yang Pengtao Li Bin Huang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Langu Institute for Materials Analysis Co.Ltd Weihai 264207China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China

Tailoring heterogeneities could bring out excellent strength-ductility synergy properties.A gradient nanograined(GNG)structure,*** size range from nanometer(~50 nm)at topest surface layer to micrometer(~1.3μm)at center layer,was successfully introduced into CrCoNi medium-entropy alloy(MEA)by means of high energy shot peening in this *** results demonstrated that this GNG CrCoNi MEA shows excellent strength and ductility combination properties,exhibiting high yield strength and ultimate tensile strength of~1215 MPa and~1524 MPa,respectively,while remaining a good ductility of~23.0%.The extraordinary hetero-deformation induced(HDI)hardening origins from heterogeneous structure,*** structure,which contributes to the majority strength *** reinforced heterogeneous structure during tension process results in the enhanced HDI hardening effect,which facilitates excellent ductility and strain hardening capacity at high-level *** work provide not only a feasible and effective way to strengthen the CrCoNi MEA,and other low stacking faults energy(SFE)materials,but also an useful insight to understanding HDI hardening in heterogeneous structure.

关键词： Medium-entropy alloy Gradient nano-grained structure High energy shot peening Hetero-deformation induced hardening Strength-ductility synergy

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