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STUDY ON ThE TANTALIZING ON ThE SURFACE OF TITANIUM ALLOY BY NET-ShAPE CAThODE GLOW DISChARGING

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 375-379页

作者： F.Chen h.Zhou Y.F.Zhang J.D.Pan DepartmentofMechanicalEngineering BeijingInsistuteofPetro-ChemicalTechnologyBeijing102617China DepartmentofMechanicalEngineering BcijingInstituteofGraphicCommunicationBcijing102600China DepartmentofPressandPacking ResearchInstituteofSurfaceEngineeringTaiyuanUniversityofTechnologyTaiyuan030024China

A new net-shape cathode sputtering target which has a simple structure and a hig h sputtering was put forward. The multiple-structure made of alloying and coatin g layers of tantalum was achieved on the surface of TC4 (Ti6Al4V) using this met hod in double glow surface alloying process. The tantalized samples were investi gated by SEM, XRD and electrochemical corrosion method .Results show the complic ated tissue of pure tantalizing layer and diffusion layer was successfully forme d on the surface of TC4 with the method of net-shape cathode glow discharge, whi ch further improved the corrosion-resistance of TC4 and formed good corrosion-re sistant alloys.

关键词： TC4 (Ti6Al4V) cathode sputtering tantalizing

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反铁磁耦合记录介质的一级翻转曲线

物理学报 2008年第11期57卷 7287-7291页

作者：阴津华 C.h.hee 潘礼庆北京科技大学物理系 Data Storage Institute 5 Engineering Drive 1Singapore 117608

用实验测量和微磁计算的方法得到了反铁磁耦合记录介质的一级翻转曲线.利用微磁计算的目的是便于正确地理解一级翻转曲线分布图.因为它可以把一级翻转曲线分布图中不同部分与相应的磁化翻转联系起来.这样一级翻转曲线就能被用来分析复... 详细信息

用实验测量和微磁计算的方法得到了反铁磁耦合记录介质的一级翻转曲线.利用微磁计算的目的是便于正确地理解一级翻转曲线分布图.因为它可以把一级翻转曲线分布图中不同部分与相应的磁化翻转联系起来.这样一级翻转曲线就能被用来分析复杂磁化翻转及其相互作用的细节,而这种手段可以提供比通常用的ΔM方法更多的信息.

关键词：反铁磁耦合记录介质一级翻转曲线微磁学模拟

hepatocellular carcinoma in central Sydney :a 10yearreview of patients seen in a medical oncology department

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World Journal of Gastroenterology 1999年第6期5卷 483-487页

作者： Desmond Yip 1, Michael Findlay 2, Michael Boyer 1 and Martin h. Tattersall 3 Royal Prince Alfred hospital 澳大利亚 Wellington Cancer Centre 新西兰 University of Sydney 澳大利亚

AIM To report a single Australian oncology unit′s experience with the management of patients with hepatocellular carcinoma (hCC), in the context of a literature review of the current management issues. METhODS Retrospective case record review of 76 patients with diagnosis of hCC referred to the unit between 1984 and 1995. RESULTS Sixty three patients had adequate records for analysis. Thirty six (56%) were migrants with half from Southeast Asia. Twenty four patients had a documented viral aetiology. Nine (14%) of 51 patients with pathological confirmation of hCC had normal alpha fetoprotein levels. Median survival of the 20 patients managed palliatively was 5 weeks compared to 16 weeks for the cohort overall. Surgery in 16 patients rendered all initially disease free with a median survival of 88 weeks. Chemoembolisation induced tumor responses in 5 of the 11 patients so treated. Systemic chemotherapy and tamoxifen treatment caused tumor response in two of 12 and one of 25 respectively. CONCLUSION Prolonged survival of patients with hCC depends on early detection of small tumors suitable for surgical resection. Other active treatments are palliative in intent and have limited success. In addition to tumor response and survival duration, the toxicities of therapies and the overall quality of life of patients need to be considered as important outcomes. Viral hepatitis prevention and screening of individuals at risk are strategies that are important for hCC management in communities where the disease is endemic.

关键词： carcinoma, hepatocellular liver neoplasms survival/rate Australia

Vibration Behavior of a Sandwich Porous Elliptical Micro-Shell with a Magneto-Rheological Core Based on the Modified Couple Stress Theory

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Advances in Applied Mathematics and Mechanics 2023年第6期15卷 1655-1698页

作者： A.Mohammadpour S.Jafari Mehrabadi P.Yousefi h.Mohseni Monfared Department of Mechanical Engineering Islamic Azad UniversityArak Branch.ArakIran

Recently,the use of porous materials has grown widely in many structures,such as beams,plates,and *** characteristics of porous materials change in the thickness direction by different *** study has investigated the free vibration analysis of a sandwich porous elliptical micro-shell with a magneto-rheological fluid(MRF)core for the first ***,we examined the displacement of the middle layer’s macro-and micro-components,using Love’s shell ***,we used the modified couple stress theory(MCST)to obtain the strain and symmetrical curvature tensors for the three *** hamilton’s principle was implemented to derive the equations of *** also used the Galerkin’s method to solve the equations of motion,resulting in a system of equations in the form of a linear eigenvalue *** solving the governing equations,we obtained the various natural frequencies and loss factors of the elliptical micro-shell,and compared them with the results in earlier ***,we investigated the effects of thickness,porosity distribution pattern,aspect ratio,length scale parameter,and magnetic field intensity on the natural frequency and loss factor of the *** data accuracy was validated by comparing them with those of reputable previous articles.

关键词： Elliptical micro shell free vibration magneto-rheological core modified couple stress theory sandwich porous material

Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe–Ti oxides

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Acta Geochimica 2021年第6期40卷 871-894页

作者： Adel A.Surour Ahmed.M.A.El-Kammar Ebtisam h.Arafa hala M.Korany Petroleum and Mining Geology Faculty of SciencesGalala University43511 New Galala CityEgypt Department of Geology Faculty of ScienceCairo UniversityGiza 12613Egypt

Mineralogical and geochemical characteristics of stream sediments collected from 30 stations in the Dahab-Wadi Kid area(southeastern Sinai,Egypt)are *** studied sediments contain considerable amounts of heavy minerals,including abundant Fe–Ti oxides,with up to 25.94%index figure that measures the relative abundance of heavy minerals to light *** of the sediments and nature of Fe–Ti oxide intergrowths,in addition to some non-opaque heavy minerals,indicate multiple provenances with contributions from a variety of Neoproterozoic mafic to felsic *** amounts of heavy minerals are derived from schists that belong to the so-called Wadi Kid volcanosedimentary *** to the considerable contribution of the felsic intrusions represented by within-plate granites,the sediments are enriched in REE-bearing minerals(e.g.,monazite,cerianite,La-cerianite and allanite),V-bearing thorite,zircon,and a ZrO_(2) *** majority of Fe–Ti oxides are derived from the mafic intrusions,and they show evidence of pre-,syn-and post-depositional phases of alteration and formation of *** to the geochemical signature of the bulk silt fraction,there is remarkable enrichment of LREEs with distinct negative Eu anomaly,and this supports dominance of a provenance dominated by felsic intrusions(i.e.,the A-type within-plate granite and associated pegmatites).Also,the felsic provenance is responsible for slight abnormality of ∑PU+Th content(up to~37 ppm)and few anomalous samples bear uraniferous zircon and Ce-type *** present paper sheds light on the fertility of the Dahab stream sediments in some economic minerals for possible future exploitation,not for gold only,but for potential REEbearing minerals that are needed for a wide spectrum of modern technological industries.

关键词： Dahab stream sediments Silt fraction Fe-Ti oxides Textural variations Rees enrichment

RECRYSTALLIZATION BEhAVIOR AND PRIOR AUSTENITE GRAIN BOUNDARY CORROSION IN ThE PLANE STRAIN COMPRESSION CONDITION FOR A LOW CARBON X70 PIPELINE STEEL

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Acta Metallurgica Sinica(English Letters) 2004年第6期17卷 830-834页

作者： Y.h.Li J.Wang Y.S.Li Y.KShan Dep.ofMaterialScienceandEngineering ShenyangLigongUmversityShenyang110168China InstituteofIndustry NingboPolytechnicNingbo315800China SchoolofMaterial＆ChemicalEngineering SouthernInstituteofMetallurgy＇Ganzhou341000China InstituteofMetalResearch TheChineseAcademyofSdencesShenyang110016China

Recrystallization behavior of a low carbon X70 pipeline steel was studied in the plane strain compression condition. It was found that the dynamic recovery but no dynamic recrystal- lization occurred in the current ex... 详细信息

关键词： pipeline steel, plane strain compression, recrystallization, austenite grain boundary

Arterial complication of irreversible electroporation procedure for locally advanced pancreatic cancer

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World Journal of Gastrointestinal Oncology 2016年第10期8卷 751-756页

作者： Yahya Ekici Tugan Tezcaner hüseyin Onur Aydin Fatih Boyvat G?khan Moray Department of General Surgery Medical Faculty of Baskent University Department of Radiology Medical Faculty of Baskent University

Irreversible electroporation(IRE) is a non-thermal ablation technique used especially in locally advanced pancreatic carcinomas that are considered surgically *** present the first case of acute superior mesenteric artery(SMA) occlusion secondary to pancreatic IRE procedure that has not been reported before in the literature.A 66-year-old man underwent neoadjuvant chemoradiotherapy for locally advanced pancreatic ductal *** procedure was applied to the patient during laparotomy under general *** finishing the procedure,an acute intestinal ischemia was detected.A conventional vascular angiography was performed and a metallic stent was successfully placed to the SMA and blood flow was *** is important to be careful in such cases of tumor involvement of SMA when evaluating for IRE procedure of pancreatic tumor.

关键词： Irreversible electroporation Mesenteric artery occlusion Locally advanced pancreatic cancer Superior mesenteric artery

Photometric analysis of two extreme low mass ratio contact binary systems

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Research in Astronomy and Astrophysics 2021年第9期21卷 217-223页

作者： Surjit S.Wadhwa Nick F.h.Tothill Ain Y.De horta Miroslav Filipovié School of Science Western Sydney UniversityLocked Bag 1797PenrithNSW 2751Australia

Multi-band photometry and light curve analysis for two newly recognized contact binary systems,TYC 6995-813-1 and NSVS 13602901,are *** were found to be of extreme low mass ratios 0.11 and 0.17,*** secondary components of both systems show evidence of considerable evolution with elevated densities as well as both luminosity and radii well above their main sequence *** in the absence of significant spot activity,at least one of the systems,TYC 6995-813-1,displays features of magnetic and chromospheric *** 6995-813-1 is also determined to be a potential merger candidate with its current separation near the theoretical instability separation.

关键词： stars:binaries:eclipsing stars:evolution stars:low-mass techniques:photometric

Natural ray-emitting radionuclides in Egyptian cement

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Nuclear Science and Techniques 2005年第6期16卷 376-380页

作者： A.M.EL-ARABI A.ABBADY A.h. EL-KAMEL A. NOSIER A. MOUSTAFA Physics Deptartment Faculty of Science Qena South Valley University Egypt Physics Deptartment Faculty of Science Assiut University Egypt Physics Deptartment Faculty of Science El-Azhar University Egypt

Samples of cement manufactured in Egypt and the raw materials have been analyzed usinggamma-spectroscopy, in order to determine the concentration of natural radionuclides and associated radiologicalhazard. The mean of specific activity due to radionuclides of 226 Ra, 232 Th and 40 K was found to be (20±4), (11± 2),(320±18) (gypsum), (41±8), (27±5), (410±27) (clay), (58±11), (18±3), (321±20) (iron ore) and (37.6±6), (11.8±3),(178.6±15) Bq?kg -1 (Portland cement), respectively. 40 K concentration could not be detected in slag, limestone, sul-phateresistant cement (S.R.C.), clinker and white cement, while the mean specific activities of 226 Ra and 232 Th are(239±16), (48.7±7); (31.5±5), (10±2); (47±7), (20±5); (23±5), (10.4±3) and (23±5), (11±3) Bq?kg -1 , respectively. Theactivities (concentrations) are in the same range as the data released in other countries. The calculated radiation haz-ardparameters for all the samples are still lower than the acceptable values in Egypt and other countries.

关键词： γ射线放射性核埃及伽马射线