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Acta Metallurgica Sinica(English Letters) 2017年第7期30卷 665-674页

作者： Ming-Hui Cai Hong-Shou Huang hai-jun pan Sheng-Hui Sun Hua Ding Peter Hodgson School of Materials Science and Engineering Northeastern University Institute for Frontier Materials Deakin University

The transformation behavior, microstructural evolution and mechanical properties were compared in a coldrolled Nb–Mo microalloyed 6.5Mn alloy after intercritical annealing（IA） and quenching and partitioning（Q ＆ P）,respectively. The thermodynamic calculation and theoretical analysis were used to determine the optimal heat treatment parameters. The Q ＆ P samples exhibited relatively higher strength with relatively low ductility, mainly due to the hard martensite matrix, which resulted in continuous yielding behavior upon loading, whereas the IA samples showed the significantly improved ductility, which benefited from the more sufficient transformation-induced plasticity（TRIP） effects and the softer ultrafine ferrite matrix. The dependence of yield point elongation（YPE） of IA samples on grain size demonstrated that the YPE value was in the reverse proportional relationship to the average grain size, which agreed well with theoretical analysis.

关键词： Medium Mn steel Intercritical annealing Quenching and partitioning Mechanical properties TRIP effect Yield point elongation

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： jun Jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang pan Xiong Xin Wang junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and Technology Jiangsu Pylon Battery Co.Ltd

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene （PP） *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance（145.88 MPa） of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm-2with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Ductility

“改良胃瓣”技术抗反流作用在食管癌术中应用观察

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中外医学研究 2017年第2期15卷 3-5页

作者：赵龙刘海军潘京淮泗阳县人民医院江苏泗阳223700

目的:观察食管癌术中"改良胃瓣"的抗反流作用。方法:将80例食管癌手术患者随机分为观察组和对照组(各40例)。观察组行食管胃端侧吻合,贲门处斜形闭合形成斜形断端,利用闭合口斜形胃壁,制作成"改良胃瓣",对照组行常规手术。观察两组患者... 详细信息

目的:观察食管癌术中"改良胃瓣"的抗反流作用。方法:将80例食管癌手术患者随机分为观察组和对照组(各40例)。观察组行食管胃端侧吻合,贲门处斜形闭合形成斜形断端,利用闭合口斜形胃壁,制作成"改良胃瓣",对照组行常规手术。观察两组患者在进食后的胃食管反流情况,并进行比较。结果:观察组患者反流发生率明显低于对照组,差异有统计学意义(P<0.05)。结论:食管癌手术合理利用"改良胃瓣"明显降低食管反流发生,能够提高患者手术后生活质量,而且其方法简单、易行。

关键词：食管癌改良胃瓣胃食管反流

Growth and Electronic Properties of Ag Nanoparticles on Reduced CeO2-x（111） Films

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Chinese Journal of Chemical Physics 2012年第6期25卷 713-718,I0004页

作者： Dan-dan Kong Yong-he pan Guo-dong Wang hai-bin pan jun-fa Zhu National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei230029 China

Ag nanoparticles grown on reduced CeO2-x thin films have been studied by X-ray plhotoelec- tron spectroscopy and resonant photoelectron spectroscopy of the valence band to understand the effect of oxygen vacancies in the CeO2-x thin films on the growth and interracial elec- tronic properties of Ag. Ag grows as three-dimensional particles on the CeO2-x （111） surface at 300 K. Compared to the fully oxidized ceria substrate surface, Ag favors the growth of smaller particles with a larger particle density on the reduced ceria substrate surface, which can be attributed to the nucleation of Ag on oxygen vacancies. The binding energy of Ag3d increases when the Ag particle size decreases, which is mainly attributed to the final-state screening. The interracial interaction between Ag and CeO2_x（lll） is weak. The resonant enhancement of the 4f level of Ce3＋ species in RPES indicates a partial Ce4＋--＋Ce3＋ reduction after Ag deposited on reduced ceria surface. The sintering temperature of Ag on CeO 1.85 （111） surface during annealing is a little higher than that of Ag on CeO2 （111） surface, indicating that Ag nanoparticles are more stable on the reduced ceria surface.

关键词： Silver Ceria Growth Electronic structure X-ray photoelectron spectroscopy Resonant photoelectron spectroscopy

Association of the Common Genetic Variant Upstream of INSIG2 Gene with Obesity Related Phenotypes in Chinese Children and Adolescents

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Biomedical and Environmental Sciences 2008年第6期21卷 528-536页

作者： hai-jun WANG HENG ZHANG SHI-WEI ZHANG YONG-PING pan jun MA Department of Maternal and Child Health School of Public Health Peking University Beijing 100191 China Institute of Child and Adolescent Health Peking University Beijing 100191 China Key Laboratory of Epidemiology Ministry of Education China Dongcheng School Health Care Institute Beijing 100005 China

Objective To study the association between the rs7566605 variant of INSIG2 and obesity-related phenotypes in Chinese children and adolescents. Methods The study sample consisted of two independent cohorts of Chinese children and adolescents. Anthropometric indices, lipids, blood pressure, fasting glucose, insulin and percentage of fat mass were determined. PCR with restriction fragment length polymorphism analysis was performed for genotyping the rs7566605 variant. Results In each of the two independent cohorts, no significant association was observed between rs7566605 and obesity under additive, dominant or recessive model. We also did not detect any difference in the genotype frequency between all the obese children and controls. Furthermore, we did not find evidence of an association between body composition indices and metabolic phenotypes in all children. However, the triglyceride level of CC homozygotes was significantly higher than that of GG＋GC genotypes in obese children （P=0.022）. Additionally, we observed a non-significant trend of severe obesity in a post-hoc test. Conclusion INSIG2 rs7566605 variant is not associated Chinese childhood obesity in two independent cohorts. Further study is needed to verify the effect of rs7566605 on triglyceride in obese children.

关键词： INSIG2 gene Obesity-related phenotypes Children and adolescents

Estimating the power spectrum of a discrete cosmic momentum field with fast Fourier transform

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Research in Astronomy and Astrophysics 2020年第9期20卷 253-267页

作者： jun pan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

Fast Fourier transform based estimators are formulated for measuring momentum power spectra,including the auto power spectra of the momentum,the momentum divergence,and the cross spectrum of density fluctuation and momentum *** using the third order Bettle-Lemariéscaling function to assign discrete objects to regular grids for fast Fourier transform are proposed to clean alias *** experiments prove that the implementation can achieve sub-percent precision till close to the Nyquist *** impact of removing bulk flow on the estimation of momentum power spectra is derived theoretically and verified *** bulk flow has little effects at large scales but might induce meaningful differences in nonlinear regime,and probably it is not necessary to subtract bulk flow for samples which peculiar velocities are exact or sufficiently *** power spectra of dark matter samples from N-body simulation are measured and *** expected,the prediction of the one loop Eulerian perturbation theory agrees with simulation only slightly better than the linear theory at z=0,but can be applied to higher redshift with improved *** of simulation data and the one loop Eulerian theory both reveal that the momentum field contains strong rotational part,and there is a large stochastic component in the divergence of momentum which is not correlated with the density *** three kinds of momentum power spectra have their own characteristics.

关键词： large scale structure of Universe cosmology:theory methods:numerical methods:statistical

Multi-optimizationofasphericalmechanismforminimallyinvasivesurgery

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Journal of Central South University 2017年第6期24卷 1406-1417页

作者： NIU Guo-jun pan Bo ZHANG Fu-hai FENG hai-bo FU Yi-li State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China

In order to obtain the remote center motion(RCM) mechanism with better performance indexes and avoid the collision of multi-manipulators in minimally invasive surgery(MIS), a novel multi-objective optimization model was presented. There were two optimization objectives: a global kinematic performance index and a comprehensive stiffness index. Other indexes to characterize the design requirements such as collision probability, workspace, mechanism parameter, mass, and wall thickness were considered as constraints. Angles between two adjacent joints and cross-section dimensions of links were chosen as the design variables. The non-dominated sorting genetic algorithm II(NSGA-II) was adopted to solve the complex multi-objective optimization problem. Then, a 3-degree of freedom(DoF) MIS robotic prototype based on optimization results has been built up. The experiments to test the spatial position change of the remote center point and to test the absolute position accuracy and repetitive position accuracy of the MIS robot were achieved, and the experimental results meet the requirements of MIS.

关键词： minimally invasive surgery medical robot multi-objective optimization remote centre motion

Microcystin-LR biodegradation by Sphingopyxis ***-05

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Frontiers of Environmental Science & Engineering 2011年第4期5卷 526-532页

作者： Chengbin XIAO hai YAN junfeng WANG Wei WEI jun NING Gang pan Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China School of Chemical and Biological Engineering University of Science and Technology BeijingBeijing 100083China

A promising bacterial strain for biodegradingmicrocystin-LR(MC-LR)as the sole carbon and nitrogensource was successfully isolated from Lake Dianchi,*** strain was identified as Sphingopyxis ***-05,which was the first isolated MCs-biodegradingSphingopyxis *** *** average biodegradationrate of MC-LR by Sphingopyxis ***-05 was 28.8mg·L^(-1)per day,which was apparently higher than those ofother bacteria reported so *** optimal temperature andpH for both strain USTB-05 growth and MC-LRbiodegradation were 30℃and 7.0,*** of MC-LR from the cyanobacterial cells collectedfrom Lake Guishui and the biodegradation of MC-LR byboth strain and cell-free extract(CE)were *** results indicated that MC-LR with the initialconcentration of 4.0 mg·L^(-1)in water was biodegraded bySphingopyxis ***-05 within 4 d,while MC-LR withthe initial concentration of 28.8 mg·L^(-1)could be completelyremoved in 3 h by CE of Sphingopyxis ***-05 containing 350 mg·L^(-1)*** enzymaticbiodegradation of MC-LR,two intermediate metabolitesand a dead-end product were observed on an ***,the similar scanning profiles ofMC-LR and its metabolic products indicate that the Addaside-chain of MC-LR was kept intact in all products.

关键词： microcystin-LR(MC-LR) biodegradation Sphingopyxis sp USTB-05 cell-free extract

Advancing gastrointestinal stromal tumor management: The role of imagomics features in precision risk assessment

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World Journal of Gastrointestinal Surgery 2024年第9期16卷 2942-2952页

作者： Gui-hai pan Fei Zhou Wu-Biao Chen Ze-jun pan Department of Radiology The Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524001Guangdong ProvinceChina Department of Endocrinology The Affiliated Hospital of Guangdong Medical UniversityZhanjiang 524001Guangdong ProvinceChina

BACKGROUND Gastrointestinal stromal tumors(GISTs)vary widely in prognosis,and traditional pathological assessments often lack precision in risk *** imaging techniques,especially magnetic resonance imaging(MRI),offer potential *** study investigates how MRI imagomics can enhance risk assessment and support personalized treatment for GIST *** To assess the effectiveness of MRI imagomics in improving GIST risk stratification,addressing the limitations of traditional pathological *** Analyzed clinical and MRI data from 132 GIST patients,categorizing them by tumor specifics and dividing into risk *** dimension reduction for optimal imagomics feature selection from diffusion-weighted imaging(DWI),T1-weighted imaging(T1WI),and contrast enhanced T1WI with fat saturation(CET1WI)fat suppress(fs)*** Age,lesion diameter,and mitotic figures significantly correlated with GIST risk,with DWI sequence features like sphericity and regional entropy showing high predictive *** combined T1WI and CE-T1WI fs model had the best predictive *** the test group,the DWI sequence model demonstrated an area under the curve(AUC)value of 0.960 with a sensitivity of 80.0%and a specificity of 100.0%.On the other hand,the combined performance of the T1WI and CE-T1WI fs models in the test group was the most robust,exhibiting an AUC value of 0.834,a sensitivity of 70.4%,and a specificity of 85.2%.CONCLUSION MRI imagomics,particularly DWI and combined T1WI/CE-T1WI fs models,significantly enhance GIST risk stratification,supporting precise preoperative patient assessment and personalized treatment *** clinical implications are profound,enabling more accurate surgical strategy formulation and optimized treatment selection,thereby improving patient *** research should focus on multicenter studies to validate these findings,integrate advanced imaging technologies like PET/MRI,and incorporat

关键词： Gastrointestinal stromal tumor Magnetic resonance imaging Imagomics Risk stratification Precision medicine Diffusion-weighted imaging T1-weighted imaging Contrast enhanced T1-weighted imaging with fat saturation fat suppress

Photocatalyst-controlled and visible light-enabled selective oxidation of pyridinium salts

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Science China Chemistry 2021年第5期64卷 753-760页

作者： Xiang-jun Peng hai-Ping He Qian Liu Kun She Bao-Qi Zhang Heng-Shan Wang hai-Tao Tang Ying-Ming pan State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical Sciences of Guangxi Normal UniversityGuilin 541004China Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education Gannan Medical UniversityGanzhou 341000China

This study proposes two different methods of photocatalytic-controlled and visible light-induced selective oxidation of pyridiniums with air as the terminal *** key to these transformations is to choose the appropriate light source and *** are successfully converted into pyrroles through oxygen-mediated cycloaddition,proton-coupled electron transfer(PCET),pyridine ring opening,and *** other route is that pyridiniums selectively form 4-carbonyl pyridines through free radical rearrangement/aerobic oxidation under the catalysis of cobalt(Ⅱ).

关键词： photocatalytic-controlled reaction proton-coupled electron transfer ring opening/recyclization process rearrangement/aerobic oxidation the Ladenburg rearrangement pyridinium