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Rare Metals 2016年第11期35卷 836-840页

作者： guo-dong hao Xue-long hao Zu-Fang Zhu Department of Chemistry Mudanjiang Normal University National Center of Analysis and Testing for Nonferrous Metals and Electronic Materials General Research Institute for Nonferrous Metals

Compound ceramic coatings with the main crystalline of Al_2TiO_5（in the as-prepared coating without treatment） were prepared in situ on the surface Ti-6Al-4V alloy by means of pulsed bipolar micro-arc oxidation in Na AlO_2 solution. For the purpose of studying the antioxidation properties of the samples, the coated samples treated in argon and the as-coated samples were calcined in air at 1000 °C. And the related characteristics were investigated by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and X-ray fluorescence（XRF） spectroscopy, respectively. The results show that, when it was calcined in air for 1 h, Al_2TiO_5in the as-prepared coating decomposed and transformed into α-Al_2O_3 and rutile TiO_***, after almost 4 h in argon, Al_2TiO_5in the asprepared coating decomposed and the final coating surface contents are completely α-Al_2O_3, and those of the middle interface are mainly Al_2O_3 and Ti_2O_3. The morphologies of the coatings after calcination in argon and air are ***-temperature oxidation occurred violently in the alloy substrate without coatings. Furthermore, the weight gain curves of the as-prepared samples and the coated samples treated in argon both show a parabolic shape.

关键词： Micro-arc oxidation Ti-6AI-4V Argon High-temperature oxidation

Mechanism of a dual-phase Ti-Nb alloy exhibiting near-linear elastic deformation

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Rare Metals 2024年第5期43卷 2282-2289页

作者： Yan guo Wang Ding Wen Ma Shun guo hao-dong Meng Nian-Yao Xu School of Automotive Engineering Changzhou Institute of TechnologyChangzhou 213032China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Youke Publishing Co. LtdChina Grinm Group Co.LtdBeijing 100088China

In this work,the underlying mechanism responsible for the near-linear elastic deformation behavior of a dual-phase Ti-Nb alloy consisting of β and α'' phase with large recoverable strain was systematically *** on in situ synchrotron X-ray diffraction(SXRD)analyses,it was found that besides intrinsic elastic deformation,a slight reversible β-α'' stress-induced martensitic(SIM)transformation,which proceeded in a consecutive mode under the retarding effect of micro-defects,took place during the near-linear elastic *** unloading,a small amount of residual macroscopic strain remained in the specimen due to the incomplete reverse α''→β transformation on *** high near-linear elastic deformability of the cold drawing(CD)Ti-Nb alloy has been revealed to be attributed to the coupling actions of intrinsic elasticity as well as the consecutive and reversible β-α'' SIM *** research may contribute to a new avenue for the design and development of novel dual-phase Ti-based alloys with desirable elastic deformability.

关键词： Titanium alloys Dual-phase Near-linear elastic deformation Martensitictransformation

常规CT征象和直方图参数在肺腺癌不同病理亚型鉴别诊断中的对比研究

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中国CT和MRI杂志 2024年第4期22卷 31-34页

作者：路传文臧汉杰郭浩东李燕汪琼朱建国南京医科大学第二附属医院医学影像科江苏南京210011

目的比较常规CT征象和直方图参数对腺泡型、非腺泡型肺腺癌的鉴别效能的差异。方法回顾性收集在本院手术的185例患者共195个肺结节,其中腺泡型104个,非腺泡型91个。收集患者的人口学资料、肿瘤标记物。采用单因素分析及二元Logistic回... 详细信息

目的比较常规CT征象和直方图参数对腺泡型、非腺泡型肺腺癌的鉴别效能的差异。方法回顾性收集在本院手术的185例患者共195个肺结节,其中腺泡型104个,非腺泡型91个。收集患者的人口学资料、肿瘤标记物。采用单因素分析及二元Logistic回归分析建立常规CT征象模型、直方图(HA)模型及二者联合模型,通过曲线下面积(AUC)比较三种模型对鉴别腺泡型、非腺泡型肺腺癌的鉴别效能。结果单因素分析显示,腺泡型中,纯磨玻璃结节的占比低于非腺泡型(P=0.040);腺泡型中,病灶的CT平均值(P=0.023)、CT中位数数值(P=0.027)、紧凑度(P=0.003)、球形度(P=0.013)、熵(P<0.001)高于非腺泡型,病灶的峰度(P<0.001)、偏度(P<0.001)低于非腺泡型。二元Logistic回归分析以及ROC曲线显示联合模型及HA模型较常规CT征象模型具有更高的鉴别效能(AUC:直方图VS常规CT:0.763 VS 0.550,P<0.001;联合模型VS常规CT:0.768 VS 0.550,P<0.001);联合模型较HA模型无统计学差异(联合模型VS直方图:0.768 VS 0.763,P=0.768)。结论HA参数较常规CT征象能够更有效的鉴别腺泡型和非腺泡型肺腺癌。

关键词：肺腺癌病理亚型计算机体层成像常规特征直方图参数

Effect of different bottom blowing elements on stirring characteristics of molten bath in converter

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Journal of Iron and Steel Research International 2024年第2期31卷 368-376页

作者： Ming Lv Shuang-ping Chen Hong-min guo Yi-jie hao Xiang-dong Xing School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Shaanxi Longmen Steel Company Hancheng715405ShaanxiChina

The bottom blowing element is the key equipment to ensure the bottom blowing effect of the *** types of bottom blowing elements,dispersive type(D1),double circular seam(D2)and straight cylinder type(D3),were built,and the effects of bottom blowing element type on molten bath flow,wall erosion and furnace bottom erosion were *** was found that when the bottom blowing elements of dispersive type(D1)and double circular seam(D2)were used,the dead zone area in the lower part of the molten bath was smaller,and the high-speed zone area was larger;therefore,the stirring effect on the bottom melt was *** the straight cylinder type(D3)bottom blowing element was used,the gas penetrated the molten bath at a faster rate to reach the surface of molten bath and failed to disperse in the bottom molten bath,and the wall shear stress near the nozzle outlet was *** argon was blown by three different bottom blowing elements,the area of the wall shear stress greater than 3 Pa was 4.8,5.6 and 8.7 cm2,respectively,within 0.2 m of the bottom blowing nozzle outlet.

关键词： Converter steelmaking Bottom blowing element Molten bath stirring Wall erosion

三种不同指数模型对乳腺良恶性病变鉴别诊断效能的比较:一项基于多b值MUSEDWI的研究

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中国CT和MRI杂志 2024年第1期22卷 81-84页

作者：袁晓凡李海歌朱建国郭浩东张紫燕蔡康杰南京医科大学第二附属医院医学影像科江苏南京210011

目的比较基于多b值MUSE-DWI的单指数模型、双指数模型、拉伸指数模型鉴别乳腺良恶性病变的诊断效能。方法回顾性分析62例经病理证实的乳腺疾病患者的MRI检查资料。根据病理结果,将病灶分为良恶性两组,采用单因素分析或非参数检验比较三... 详细信息

目的比较基于多b值MUSE-DWI的单指数模型、双指数模型、拉伸指数模型鉴别乳腺良恶性病变的诊断效能。方法回顾性分析62例经病理证实的乳腺疾病患者的MRI检查资料。根据病理结果,将病灶分为良恶性两组,采用单因素分析或非参数检验比较三种指数模型定量参数的组间差异。采用二元Logistic回归分析有组间差异的参数。采用DeLong检验比较三种指数模型的受试者工作特征(ROC)曲线下面积(AUC),评估三种模型诊断效能的差异。结果三种指数模型定量参数的值在恶性组均低于良性组(P<0.05)。单指数模型、双指数模型参数联合模型、拉伸指数模型参数联合模型鉴别乳腺良恶性病变的AUC分别为0.701,0.859,0.828;双指数模型参数联合模型与单指数模型的AUC有统计学差异(P=0.023),拉伸指数模型参数联合模型的AUC与双指数模型参数联合模型(P=0.52)及单指数模型(P=0.08)无统计学差异。结论三种不同指数模型有助于鉴别乳腺良恶性病变;双指数模型参数联合模型优于单指数模型。

关键词：乳腺病变表观扩散系数双指数模型拉伸指数模型

基于动态增强磁共振成像鉴别HER2阳性乳腺癌

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中国CT和MRI杂志 2024年第7期22卷 99-101,117页

作者：郭浩东袁晓凡朱建国蔡康杰崔梦涵李海歌南京医科大学第二附属医院医学影像科江苏南京210011 南京医科大学第二附属医院病理科江苏南京210011

目的评价基于动态增强磁共振成像(DCEMRI)的定量、半定量参数在鉴别HER2阳性乳腺癌中的作用。方法采用回顾性研究方法,收集女性乳腺癌患者147例。所有患者接受3.0T MRI检查,采集到的DCE-MRI的参数包括:容积转运常数(K^(trans))、速率常... 详细信息

目的评价基于动态增强磁共振成像(DCEMRI)的定量、半定量参数在鉴别HER2阳性乳腺癌中的作用。方法采用回顾性研究方法,收集女性乳腺癌患者147例。所有患者接受3.0T MRI检查,采集到的DCE-MRI的参数包括:容积转运常数(K^(trans))、速率常数(k_(ep))、血管外细胞外容积分数(v_(e))、血浆容积分数(v_(p))、达峰时间(TTP)、最大浓度(MAX Conc)、增强曲线下初始面积(AUC)、最大斜率(MAX Slope)。将患者分别分为两组(HER2阳性组vs.非HER2阳性组)。采用单因素分析参数组间差异;进一步采用二元Logistic回归,并构建联合诊断模型,评估DCE-MRI定量、半定量参数及联合诊断模型鉴别HER2阳性乳腺癌的价值。结果两组的组间比较中,8个定量、半定量参数具有统计学差异;k_(ep)、TTP和联合模型对于HER2阳性乳腺癌具有诊断价值(AUC=0.763、0.733、0.832,经DeLong检验比较,P均<0.020)。结论DCE-MRI定量参数、半定量参数是HER2阳性乳腺癌的独立诊断因素;k_(ep)、TTP和联合诊断模型对HER2阳性乳腺癌具有诊断价值,且联合模型的诊断效能更高。

关键词：动态增强磁共振成像速率常数(kep) 乳腺癌分子分型 HER2阳性乳腺癌

Eco-friendly polysaccharide coatings for antifouling and dragreduction and potential application for marine devices

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Friction 2024年第4期12卷 726-744页

作者： hao YANG Liguo QIN Wenhui Zhao Fagla Jules MAWIGNON Hui guo Yongkang WU Yali ZHANG Guangneng dong Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System Institute of Design Science and Basic ComponentsSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Biomedical Information of Ministry of Education School of Life Science and TechnologyXi’an Jiaotong UniversityXi’an 710049China Department of Endocrinology First Affiliated Hospital of Medical CollegeXi'an Jiaotong UniversityXi’an 710061China

Traditional antifouling agents usually have a certain toxic effect on marine environments and non-target *** this study,Dictyophora indusiata polysaccharide(DIP)was applied as a natural antifouling surface modifier to prepare the surface coating for marine *** DIP coatings were prepared:*** spore polysaccharide(DISP),*** volva polysaccharide(DIVP),and *** embryonic body polysaccharide(DIEP).The antifouling,tribological,and anticorrosion behavior of the coatings were *** revealed that the three kinds of DIP coatings had excellent antifouling properties,which could effectively prevent the adhesion of Chlorella and the attachment of water-based and oily stains on the ***,the coatings showed great mechanical stability and could maintain an extremely low coefficient of friction(COF<0.05)after continuous *** drag reduction rate of the coated surfaces reached 5%,showing a powerful lubrication ***,the DIP coatings presented an outstanding corrosion resistance,where the equivalent circuit impedances were 4-9 orders of magnitude higher than the control *** research showed a promising prospect of surface coating fabrication with DIP for marine devices to achieve the purpose of antifouling and drag reduction.

关键词： Dictyophora indusiata polysaccharide(DIP)coating antifouling anticorrosion lubrication and drag reduction

N ＝ 4 Superconformal Quantum Mechanics in One Dimension and Its Algebraic Structure

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Communications in Theoretical Physics 2002年第7期38卷 11-14页

作者： RUAN dong guo hao SUN Hong-Zhou Department of Physics Tsinghua University Beijing 100084 China The Key Laboratory of Quantum Information and Measurements of Ministry of Education Tsinghua University Beijing 100084 China Center of Theoretical Nuclear Physics National Laboratory of Department of Physics Tsinghua University Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China Institute of Theoretical Physics Academia Sinica Beijing 100080 China

N = 4 superconformal quantum mechanics of nonrelativistic particles in the typical 1/x2-potentials, which holds not only supersymmetry but also dynamical conformal symmetry, is studied. The corresponding superconformal quantum mechanical algebra, which contains supersymmetric quantum mechanical algebra with four supercharges and conformal algebra as subalgebras, and its two canonical group chains are established.

关键词： supersymmetry, conformal symmetry, superconformal algebra

Vertically aligned montmorillonite aerogel-encapsulated polyethylene glycol with directional heat transfer paths for efficient solar thermal energy harvesting and storage

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 907-916页

作者： Qijing guo Cong guo hao Yi Feifei Jia Shaoxian Song Key Laboratory of Green Utilization of Critical Non-metallic Mineral Resources Ministry of EducationWuhan University of TechnologyWuhan 430070China School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of TechnologyWuhan 430070China

The conversion and storage of photothermal energy using phase change materials(PCMs)represent an optimal approach for harnessing clean and sustainable solar ***,we encapsulated polyethylene glycol(PEG)in montmorillonite aerogels(3D-Mt)through vacuum impregnation to prepare 3D-Mt/PEG composite *** used as a support matrix,3D-Mt can effectively prevent PEG leakage and act as a flame-retardant barrier to reduce the flammability of ***,3D-Mt/PEG demonstrates outstanding shape retention,increased thermal energy storage density,and commendable thermal and chemical *** phase transition enthalpy of 3D-Mt/PEG can reach 167.53 J/g and remains stable even after 50 heating-cooling ***,the vertical sheet-like structure of 3D-Mt establishes directional heat transport channels,facilitating efficient phonon *** configuration results in highly anisotropic thermal conductivities that ensure swift thermal responses and efficient heat *** study addresses the shortcomings of PCMs,including the issues of leakage and inadequate flame *** achieves the development and design of 3D-Mt/PEG with ultrahigh strength,superior flame retardancy,and directional heat ***,this work offers a design strategy for the preparation of high-performance composite *** 3D-Mt/PEG with vertically aligned and well-ordered array structure developed in this research shows great potential for thermal management and photothermal conversion applications.

关键词： montmorillonite aerogel polyethylene glycol phase change materials solar thermal energy storage flame retardant

Divergent defluorocarboxylation of α-CF_(3) alkenes with formate via photocatalyzed selective mono-or triple C-F bond cleavage

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Science China Chemistry 2024年第1期67卷 368-373页

作者： Xing-Yu Wang Pei Xu Wen-Wen Liu hao-Qiang Jiang Song-Lei Zhu dong guo Xu Zhu Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy School of PharmacyXuzhou Medical UniversityXuzhou 22100China

Unprecedented divergent synthesis of gem-difluorovinylacetic acid and glutaric acid derivatives fromα-CF_(3)alkenes with formate as the carbonyl source was *** reaction can undergo selective mono-or triple C-F bond cleavage by simply switching the photocatalyst and hydrogen atom transfer(HAT)catalyst under visible-light-induced conditions at room *** acts as both the C1 source and the reductant through the generation of CO_(2)^(·-)species,which underwent Giese radical addition to electron-deficient alkenes to trigger the consecutive C-F bond cleavage and carboxylation process.

关键词： C-F bond activation defluorocarboxylation carbon dioxide radical anion visible light