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A Mssbauer Study on the Mechanically Alloyed Cu-Sn Alloys

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Journal of Materials Science & Technology 1998年第6期14卷 551-554页

作者： Yuanzheng YANG youlan zhu and Qiaoshen LI(Dept. of Materials Science and Engineering, Guangdong University of Technology, Guangzhou 510090, China)Xueming MA and Yuanda DONG(Dept. of Materials Science and Engineering, Shanghai University, Shanghai 200072, Dept. of Materials Science and Engineering Guangdong University of Technology Guangzhou 510090 China Dept. of Materials Science and Engineering Shanghai University Shanghai 200072 China Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

Nanocrystalline E and η electron compounds and supersaturated solid solution of the Cu-Sn system have been prepared by mechanical alloying of elemental Cu and Sn powders. The atomie alloying and microstructure of the resultant alloys have been investigated by XRD, DSC and 119Sn Mossbauer spectroscopy. A little amount of SnO2 was detected by Mossbauer spectroscopy, although no trace of diffiaction peaks occurred in the XRD pattern. Thus the spectra for all the milled samples should be fitted using two quadrupole-splitting doublets: one corre sponding to SnO2, the other corresponding to the resultant alloys. The composition dependence of the hyperfine parameters has been eXtensively discussed and explained well with respect to oxidation, sudece effect resulting from grain refinement, coordination environment asymmetry and distortion caused or/and induced by mechanical alloying.

关键词： Sn A M ssbauer Study on the Mechanically Alloyed Cu-Sn Alloys Cu

A NUMERICAL METHOD WITH HIGH ACCURACY FOR CALCULATING THE INTERACTIONS BETWEEN DISCONTINUITIES IN THREE INDEPENDENT VARIABLES

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Science in China,Ser.A 1980年第12期 1491-1501页

作者：朱幼兰陈炳木 The Computing Center Academia Sinica

The main purpose of this paper is to present a complete numerical method with high accuracy for calculating the interactions between discontinuities of hyperbolic systems in three independent variables. The method has been applied to the calculation of the interactions between two shocks and between a shock and a contact discontinuity in three dimensional steady flows. This paper gives some results of the *** secondary purpose is to present a method of calcuiating embedded shocks accurately and automatically. The method is based on the characteristic theory. We have applied the method to the calculating embedded shocks in three dimensional steady flows. This paper gives one numerical result of embedded shocks.

关键词： A NUMERICAL METHOD WITH HIGH ACCURACY FOR CALCULATING THE INTERACTIONS BETWEEN DISCONTINUITIES IN THREE INDEPENDENT VARIABLES

高NH4Cl质量浓度下电镀Ni-P合金的研究

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材料导报 2010年第S2期24卷 543-545页

作者：冯婧朱有兰詹柏林陈颖广东工业大学材料与能源学院

通过添加适量的添加剂,采用正交试验方法,研究了高氯化铵质量浓度下在Q235钢基体上低温电镀Ni-P合金的工艺参数。实验得出最佳工艺条件为:NiSO·6HO 40g/L、NaHPO·HO 30g/L、HBO15g/L、NHCl 32g/L、添加剂T1 0.12g/L、添加剂T2 0.03g/... 详细信息

通过添加适量的添加剂,采用正交试验方法,研究了高氯化铵质量浓度下在Q235钢基体上低温电镀Ni-P合金的工艺参数。实验得出最佳工艺条件为:NiSO·6HO 40g/L、NaHPO·HO 30g/L、HBO15g/L、NHCl 32g/L、添加剂T1 0.12g/L、添加剂T2 0.03g/L、添加剂T3 0.1g/L、施镀温度45℃、电流密度0.015A/cm、pH=4。最佳工艺条件下所获镀层的EDS分析表明,镀层由靠近基体部位到镀层表面部位,P质量分数变化情况为6.61%→7.18%→8.73%。随着离基体距离的增大,镀层显微结构由晶态向微晶转化,最后为完全非晶态。

关键词：电镀 Ni-P合金镀层正交试验非晶

Chang’an decoction(肠安方)alleviates endoplasmic reticulum stress by regulating mitofusin 2 to improve colitis

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Journal of Traditional Chinese Medicine 2024年第3期44卷 427-436页

作者： CHEN youlan DING Mingming HUANG Chaoyuan ZHENG Yiyuan LIU Fengbin Institute of Integrated Traditional Chinese and Western Medicine Digestive Diseases Shuguang HospitalShanghai University of Traditional Chinese MedicineShanghai 200021China Department of Gastroenterology the First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510405China Department of Oncology Baoshan District Hospital of Integrated Traditional Chinese and Western Medicine of ShanghaiShanghai 201900China the First Clinical Medical School Guangzhou University of Chinese MedicineGuangzhou 510405China Baiyun Hospital of the First Affiliated Hospital of Guangzhou University of Chinese Medicine Guangzhou 510405China

OBJECTIVE:To evaluate the protective effects of Chang'an decoction(肠安方,CAD)on colitis,and investigate the potential mechanisms underlying these effects from the perspectives of endoplasmic reticulum(ER)stress induced by mitofusin 2(MFN2).METHODS:The composition of CAD was identified by liquid chromatography-mass spectrometry technology.A mice model of dextran sulfate sodium(DSS)induced colitis was established and therapeutic effects of CAD were determined by detecting body weight,disease activity index,colon length and histopathological ***,the expression levels of MFN2,ER stress markers and Nucleotide-binding domain and leucine-rich repeat protein3(NLRP3)relevant proteins were detected by polymerase chain reaction(PCR),Western blot,immunohistochemistry and immunofluorescence ***,knockdown and overexpression cell model were constructed to further investigate the underlying mechanism of MFN2 mediating ER stress and energy metabolism by PCR,Western blot,electron microscopy and reactive oxygen species(ROS)***,inflammatory indicator and tight junction proteins were measured by PCR and immunofluorescence staining to evaluate the protective effects of ***:Results showed that the indispensable regulatory role of MFN2 in mediating ER stress and mitochondrial damage was involved in the protective effects of CAD on colitis in mice fed with *** pharmacology analysis also revealed CAD may play a protective effect on colitis by affecting mitochondrial *** addition,our data also suggested a causative role for MFN2 in the development of inflammatory responses and energy metabolic alterations by constructing a knockdown and overexpression cell model whereby alter proper ER-mitochondria interaction in Caco-2 ***,relative expression analyses of ER stress markers and NLRP3 inflammasome showed the onset of ER stress and activation of NLRP3 inflammasome,which is consistent with the above *** contrast,i

关键词： colitis mitofusin 2 endoplasmic reticulum stress mitochondrial damage Chang'an decoction

ABS表面Ni-P-SiC纳米复合镀层工艺及性能研究

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材料导报 2008年第S2期22卷 164-166页

作者：郭振伟朱有兰丘秀敏广东工业大学材料与能源学院

研究了在ABS塑料上复合电镀Ni-P-SiC（n）的工艺及性能,对影响镀层质量的几大因素进行了探讨,从而确定了在ABS塑料上复合电镀Ni-P-SiC（n）的最佳工艺以及相关参数。通过观察分析表面形貌并对镀层进行显微硬度等测试,确定了最佳工艺条件... 详细信息

研究了在ABS塑料上复合电镀Ni-P-SiC（n）的工艺及性能,对影响镀层质量的几大因素进行了探讨,从而确定了在ABS塑料上复合电镀Ni-P-SiC（n）的最佳工艺以及相关参数。通过观察分析表面形貌并对镀层进行显微硬度等测试,确定了最佳工艺条件为:硫酸镍250g/L,氯化镍20g/L,磷酸5～20g/L,硼酸20g/L,SiC添加量5g/L,表面活性剂0.2g/L,pH值3～4,温度40℃,电流密度0.01A/cm;,搅拌速度1000r/min。由此工艺参数得到的Ni-P-SiC（n）复合镀层与ABS塑料结合良好,镀层均匀致密,显微硬度可达952HV。

关键词： ABS塑料复合电镀 Ni-P-纳米SiC

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ABS汽车灯罩镀亮铬处理工艺

工程塑料应用 2007年第12期35卷 39-42页

作者：陈海燕朱有兰李才取田燕广东工业大学材料与能源学院广州510006

介绍了ABS汽车灯罩的电镀亮铬新工艺。研制了一种集"粗化、敏化、活化"三合一的塑料件预处理工艺及配方,与传统预处理工艺的不同之处在于其工艺成本低、易操作、溶液寿命长。并研究出含稀土添加剂的低铬酸电镀铬的工艺及配方。结果表明... 详细信息

介绍了ABS汽车灯罩的电镀亮铬新工艺。研制了一种集"粗化、敏化、活化"三合一的塑料件预处理工艺及配方,与传统预处理工艺的不同之处在于其工艺成本低、易操作、溶液寿命长。并研究出含稀土添加剂的低铬酸电镀铬的工艺及配方。结果表明,采用该新工艺对ABS塑料件进行电镀,可在获得外观光亮平滑、均匀致密、结合力良好的铬镀层的基础上,大大提高生产效率。

关键词： ABS 电镀铬预处理稀土添加剂

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金属换热器防腐技术研究进展

材料导报 2006年第12期20卷 79-82页

作者：詹柏林朱有兰陈颖张永泉广东工业大学材料与能源学院广州510006

全面介绍了目前国内外换热器的防腐技术和方法,并对各种技术进行综合评价与比较。环保、低成本、高效率地提高换热器的耐蚀性能是换热器防腐技术的前进方向。因此,面对现代化工业和市场对换热器耐蚀性能要求的不断提高,综合各种防腐技... 详细信息

全面介绍了目前国内外换热器的防腐技术和方法,并对各种技术进行综合评价与比较。环保、低成本、高效率地提高换热器的耐蚀性能是换热器防腐技术的前进方向。因此,面对现代化工业和市场对换热器耐蚀性能要求的不断提高,综合各种防腐技术是解决换热器腐蚀问题的首选方法,改善电镀和化学镀非晶态镀层工艺问题、进一步提高非晶态镀层质量和沉积钛镀层的研究应是努力的方向。

关键词：金属换热器防腐技术非晶态镀层钛镀层

Few-shot incremental radar target recognition framework based on scattering-topology properties

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Chinese Journal of Aeronautics 2024年第8期37卷 246-260页

作者： Chenxuan LI Weigang zhu Bakun zhu Yonggang LI Graduate School Space Engineering UniversityBeijing 101400China Department of Electronic and Optical Engineering Space Engineering UniversityBeijing 101400China

The continuous emergence of new targets in open scenarios leads to a substantial decrease in the performance of Inverse Synthetic Aperture Radar(ISAR)recognition ***,data scarcity further exacerbates the challenge of identifying new classes of ISAR *** this paper,a few-shot incremental target recognition framework based on Scattering-Topology Properties(STPIL)is ***,STPIL extracts scattering-topology properties of ISAR targets as recognition ***,the pseudo-incremental training strategy effectively alleviates the algorithm’s forgetting of old knowledge,and improves compatibility with new ***,a feature embedding network,with few parameters,is designed based on the graph neural *** embedding network is highly adaptable to changes in data ***,STPIL fully considers the joint distribution and marginal distribution in scattering features,and uses the Brownian distance metric module to make the scattering-topology features more *** results on both the simulation dataset and the public measured data indicate that STPIL can effectively balance new classes with old classes,and has superior performance to other advanced methods in the incremental recognition of targets.

关键词： Brownian distance metric Graph neural networks Incremental learning Inverse Synthetic Aperture Radar(ISAR) Scattering

Stress-strain relationship for reactive powder concrete with recycled powder under uniaxial compression

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Frontiers of Structural and Civil Engineering 2024年第7期18卷 1015-1027页

作者： Peng zhu Yunming zhu Wenjun QU Liyu XIE College of Civil Engineering Tongji UniversityShanghai 200092China Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji UniversityShanghai 200092China

The recycled powder(RP)from construction wastes can be used to partially replace cement in the preparation of reactive powder *** this paper,reactive powder concrete mixtures with RP partially replacing cement,and natural sand instead of quartz,are *** curing is used,instead of steam curing that is normally requested by standard for reactive powder *** influences of RP replacement ratio(0%,10%,20%,30%),silica fume proportion(10%,15%,20%),and steel fiber proportion(0%,1%,2%)are *** effects of RP,silica fume,and steel fiber proportion on compressive strength,elastic modulus,and relative absorption energy are analyzed,and theoretical models for compressive strength,elastic modulus,and relative absorption energy are established.A constitutive model for the uniaxial compressive stress-strain relationship of reactive powder concrete with RP is *** the increase of RP replacement ratio from 0% to 30%,the compressive strength decreases by 42% and elastic modulus decreases by 24%.

关键词： recycled powder reactive powder concrete elastic modulus relative absorbed energy stress-strain relationship