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Microstructure and mechanical properties of Ti-Cu amorphous coating synthesized on pure Cu substrate by mechanical alloying method

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Rare Metals 2020年第10期39卷 1222-1228页

作者： Cheng Chen Xiao-mei feng yi-fu Shen School of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211800China College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Mechanical alloying method was applied to fabricate coating with amorphous structure on pure Cu *** microstructure,the phase composition and the mechanical properties including microhardness and wear resistance of the coating were,respectively,characterized and *** results show that the coating is rough but *** has favorable adhesion to the *** coating is made up of an inner composite layer and an outer amorphous *** microhardness and the wear resistance of the pure Cu substrate are improved because of the bilayer *** formation mechanism of the coating was *** as-synthesized coating is considered to be effective to strengthen the surface of pure Cu substrate.

关键词： Coating Amorphous Mechanical alloying Surface reinforcement

Pseudo-differential Operators and Generalized Lax Equations in Symbolic Computation

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Communications in Theoretical Physics 2008年第5期49卷 1139-1144页

作者： JIA yi-feng CHEN Yu-fu School of Mathematical Sciences Capital Normal University Beijing 100037 China School of Mathematical Sciences Graduate University of the Chinese Academy of Sciences Beijing 100049 China

In this paper, the pseudo-differential operators and the generalized Lax equations in integrable systems are implemented in symbolic software Mathematica. A great deal of differential polynomials which appear in the procedure are dealt with by differential characteristic chain method. Using the program, several classical examples are given.

关键词： pseudo-differential operators generalized Lax equation Zakharov-Shabat equation integral systems hierarchy characteristic chain

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利伐沙班在犬和猫临床应用的研究进展

动物医学进展 2025年第1期46卷 97-102页

作者：王炜江蓝路心怡付诗懿刘亦婷韦力煣俞峰刘波中国农业大学动物医学院北京100193 中国农业大学教学动物医院北京100193

血栓栓塞是犬、猫临床上多种疾病的并发症,可累及动脉或静脉,预后较差。目前兽医临床防治血栓栓塞可用的抗血栓药物种类有限,影响临床诊疗水平,引入新药具有实际意义。利伐沙班是一种新型非维生素K拮抗剂类口服抗凝药物,研究证明其能够... 详细信息

血栓栓塞是犬、猫临床上多种疾病的并发症,可累及动脉或静脉,预后较差。目前兽医临床防治血栓栓塞可用的抗血栓药物种类有限,影响临床诊疗水平,引入新药具有实际意义。利伐沙班是一种新型非维生素K拮抗剂类口服抗凝药物,研究证明其能够特异性抑制活性凝血因子X从而抑制血栓形成。近年来人医领域对利伐沙班的相关临床研究逐渐丰富,涉及单用利伐沙班或使用双通路抑制疗法防治不同类型的动、静脉血栓栓塞,可为其应用于兽医临床提供据。犬、猫临床使用利伐沙班的研究正相继开展,论文就犬、猫血栓栓塞疾病发病情况、防治现状,利伐沙班的药理学特性及其在人医、兽医领域的临床试验研究进展进行综述,以期为兽医临床上利伐沙班的进一步研究提供参考。

关键词：新型口服抗凝药利伐沙班血栓栓塞犬猫

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烯肟菌酯正辛醇-水分配系数的测定

四川师范大学学报（自然科学版） 2012年第1期35卷 113-116页

作者：黄杰付一峰范志金王守信黄云刘长令四川农业大学植物病理学系四川成都611130 南开大学元素有机化学国家重点实验室天津300071 沈阳化工研究院有限公司辽宁沈阳110021

建立了水中微量烯肟菌酯的测定方法,水中的烯肟菌酯经二氯甲烷萃取后,进HPLC测定,方法的平均添加回收率为98.1%～100.9%,烯肟菌酯的最小检出量为2×10-9g,最小检出浓度为0.02μ***-1.摇瓶法对烯肟菌酯正辛醇-水分配系数的测定结果表明,... 详细信息

建立了水中微量烯肟菌酯的测定方法,水中的烯肟菌酯经二氯甲烷萃取后,进HPLC测定,方法的平均添加回收率为98.1%～100.9%,烯肟菌酯的最小检出量为2×10-9g,最小检出浓度为0.02μ***-1.摇瓶法对烯肟菌酯正辛醇-水分配系数的测定结果表明,烯肟菌酯在二次蒸馏水中的lgKow为3.03±0.12.生物体对烯肟菌酯具有较强程度的富集作用.

关键词：烯肟菌酯杀菌剂正辛醇-水分配系数

妊娠滋养细胞肿瘤子宫病灶彩色多普勒血流显像动态观察

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实用妇产科杂志 2001年第2期17卷 90-92页

作者：石一复叶大风吕卫国鲁红浙江大学医学院附属妇产科医院浙江杭州310006

目的 :探讨化疗前后妊娠滋养细胞肿瘤 (GTT)血流动力学变化。方法 :利用彩色多普勒血流显像图 (CDBFI)动态检测 18例 GTT患者化疗前及每疗程化疗后子宫动脉 ,病灶内血流指数 ,并选取同期 2 0例非孕正常妇女子宫动脉阻力指数作为对照。结... 详细信息

目的 :探讨化疗前后妊娠滋养细胞肿瘤 (GTT)血流动力学变化。方法 :利用彩色多普勒血流显像图 (CDBFI)动态检测 18例 GTT患者化疗前及每疗程化疗后子宫动脉 ,病灶内血流指数 ,并选取同期 2 0例非孕正常妇女子宫动脉阻力指数作为对照。结果 :GTT患者化疗前子宫动脉及病灶内血流呈现低阻状态 ;化疗后随 h CG的下降 ,CDBFI示整个血流逐渐减少 ,病灶内血流丰富区范围缩小 ,子宫动脉及病灶内血流参数逐渐恢复正常。化疗前和 1～ 3疗程化疗后子宫动脉处 RI明显低于正常非孕妇女 (P<0 .0 1) ,4疗程化疗后子宫动脉 RI与正常非孕妇女相近。结论 :彩色多普勒血流显像图检查对妊娠滋养叶肿瘤的诊断有帮助 ,通过动态观察可间接估价患者对化疗的敏感性。

关键词：彩色多普勒血流显像图妊娠滋养细胞肿瘤药物疗法

Henry Tye: the future of theoretical physics and advice to young researchers

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National Science Review 2021年第8期8卷 216-219页

作者： yi-fu Cai Sheng-feng Yan the Department of Astronomy School of Physical SciencesUSTC the National Institute for Nuclear Physics in Milan

Professor Henry Tye(戴自海) is a world-renowned expert in theoretical particle physics, string theory and cosmology. He was recently the IAS Professor at the Jockey Club Institute for Advanced Study(IAS) and the Hong Kong University of Science and Technology(HKUST),and is the Horace White Professor of Physics(Emeritus) at Cornell University. He has a lot of experience in research status in both China and the United States. Recently, NSR invited Professor yi-fu Cai(蔡一夫) from the University of Science and Technology of China(USTC)to interview Prof. Tye on his personal views on the future of theoretical physics, his own experience, and his advice to young researchers.

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Formation mechanism and mechanical properties of surface nanocrystallized Ti-6Al-4V alloy processed by surface mechanical attrition treatment

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Rare Metals 2023年第4期42卷 1343-1352页

作者： yi-feng Li Cheng Chen J.Ranabhat yi-fu Shen College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016China

In the present work,surface mechanical attrition treatment(SMAT)was proposed to achieve surface nanocrystallization on Ti-6Al-4V surface via high-energy planetary ball milling method using a planetary ball *** characteristics of microstructure were studied using different *** nanocrystallization is achieved on Ti-6Al-4V *** process of refinement could be summarized into four *** the refinement process,the reticular continuous beta phase performs a significant role,it cracked,broke up and moved to each side along the grain *** movement of beta grains has the capabilities of effectively optimizing the grain orientation and accelerating the further refinement of alpha *** also plays an important role during the *** grain orientation between different types of grains seems to be larger than that of same type *** interface will be divided into smaller nanocrystalline grains once the dislocation density breaks the ***,the balance will be achieved again and owns a higher critical value which cannot be broken,then a stable grain size can be achieved *** results of microhardness,friction coefficient and wear mass loss tests of SMAT samples indicate that the mechanical behaviors of substrate are greatly enhanced after this novel SMAT treatment.

关键词： Surface nanocrystallization Dual-phase titanium alloy SMAT Mechanical properties

黑磷/黑砷异质结纳米器件热电性质应力调控研究

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原子与分子物理学报 2025年第1期42卷 69-74页

作者：戎杙邱乙峰张蓓新疆大学物理科学与技术学院乌鲁木齐830046

探索新型高性能低维热电纳米材料已成为国家重大发展策略.论文采用密度泛函理论结合非平衡态格林函数方法研究了由黑磷、黑砷纳米带构建异质结构在2%、4%、6%和8%四种拉伸应变作用下热电性能调控机理.研究结果表明,6%拉伸应变较其他情形... 详细信息

探索新型高性能低维热电纳米材料已成为国家重大发展策略.论文采用密度泛函理论结合非平衡态格林函数方法研究了由黑磷、黑砷纳米带构建异质结构在2%、4%、6%和8%四种拉伸应变作用下热电性能调控机理.研究结果表明,6%拉伸应变较其他情形,能够更有效抑制声子输运行为;与此同时,拉伸应变对于器件的电子输运的调控效果并不明显.在费米能附近,黑磷/黑砷异质结纳米器件在6%拉伸应变调控下热电优值达到最大值2.31.

关键词：黑磷黑砷异质结应力热电性质

曲面零件铣削加工表面粗糙度控制技术研究与应用

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装备制造技术 2018年第11期 164-167,174页

作者：翟婷婷韩晓光付移风中国航发西安动力控制科技有限公司陕西西安710077

在分析曲面铣削加工机理的基础上,通过对切削过程中的理论模型进行计算,分析了铣削加工中切削深度和残余高度等参数对表面粗糙度的影响方式,提出了表面粗糙度的控制方式。

关键词：曲面零件表面粗糙度残余高度