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通用电气公司的增长之道

世界经济研究 1998年第5期 73-1页

作者：约翰·f·韦尔奇

Effect of solidification process parameters on dry sliding wear behavior of AlNiBi alloy

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Transactions of Nonferrous Metals Society of China 2020年第3期30卷 582-594页

作者： T.M.BOTELHO H.M.AZEVEDO G.H.MACHADO C.R.BARBOSA f.S.ROCHA T.A.COSTA O.L.ROCHA federal Institute of Education Science and Technology of ParáIFPAAlmirante Barroso Avenue 115566093-020 BelémPABrazil Institute of Technology Federal University of ParáUFPAAugusto Correa Avenue 166075-110 BelémPABrazil

As-cast samples of the Al-3wt.%Ni-lwt.%Bi alloy resulting from the horizontal directional solidification process were subjected to the micro-abrasive wear *** effects of the solidification thermal and microstructural parameters,such as the growth and cooling rates and the cellular and primary dendritic spacings(VL and TR;λ1 and λc;respectively),were evaluated in the wear resistance of the investigated *** tribological parameters analyzed were the wear volume and rate(Vw and Rw).The solidification experiments and the wear tests were carried out by means of a water-cooled horizontal directional solidification device and a rotary-fixed ball wear machine,*** results show lower Vw and Rw values correspond to finer microstructures and the Vw dependence on λ1 is characterized by an experimental mathematical equation.A better distribution of Bi soft droplets and Al3Ni hard intermetallic particles is observed within the finer interdendritic region and,in consequence,the better wear resistance is achieved in as-cast samples with dendritic morphology rather than cellular morphology.A transition of wear mechanism from adhesive to abrasive is observed.

关键词： unsteady-state horizontal solidification dry sliding wear cellular/dendrite arm spacing microhardness Bi particle Al_(3)Ni particle

AN UPTODATE ON NUCLEAR CARDIOLOGY

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中南大学学报(医学版) 1980年第3期 216-218+291页

作者： Wei-PingLoh f.A.C.P. f.R.C.P. President American Center for Chinese Medical Sciences Clinical Professor of Pathology Indiana University School of Medicine President American Center for Chinese Medical Sciences Clinical Professor of Pathology Indiana University School of Medicine President American Center for Chinese Medical Sciences Clinical Professor of Pathology Indiana University School of Medicine

Nuclear medicine has developed rapidly over the past 20 *** recent eight years nuclear cardiology has become a new discipline as a result of major advances in instrumentation,newly developed radiOactive tracers and the applicatiOn of computer *** nuclear cardiology methods offer the advantages of non-invasive introduction and safety without alteration of measurable hemodynamic

关键词： AN UPTODATE ON NUCLEAR CARDIOLOGY

Adequate Diagnostic Performance of Combined [¹⁸f]-fluormethylcholine PET-CT with Diffusion-Weighted MRI in Primary Staging of High Risk Prostate Cancer

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Advances in Molecular Imaging 2016年第1期6卷 1-9页

作者： Pieter L. Jager R. Jorn Beukinga Tjard D. de Haan Martijn f Boomsma Ben E. Laddé Miranda van t Veer-ten Kate Ad H. J. Oostdijk Martijn G. Steffens Department of Nuclear Medicine Zwolle Netherlands Department of Urology Zwolle Netherlands Department of Radiology Zwolle Netherlands Department of Pathology Zwolle Netherlands

Introduction: [18f]-fluoro-methylcholine (fCH) PET/CT and MRI with diffusion-weighted MRI (DW-MRI) have insufficient performance in lymph node staging of primary prostate cancer by themselves, but the combination may perform better. We aim to prospectively determine the diagnostic performance of combined fCH PET and MRI for lymph node staging. Methods: This was a single site study of diagnostic accuracy in a well-defined group of 21 consecutive high-risk primary prostate cancer patients (>30% chance of lymph node metastases) in a large community hospital. We performed fCH PET/CT and MRI with DW-MRI prior to endoscopic extended pelvic lymph node dissection (EPLND). PET was fused and interpreted together with various MRI image sets (T1, T2, DWIBS) and was only scored positive when a lymph node seen on MRI coincided with increased focal fCH uptake on PET. findings were compared with detailed histological evaluation, on a per-patient and per-region level. We calculated sensitivity, specificity, positive and negative predictive value of combined PET-MRI. Results: 14 out of 21 patients had metastatic lymph nodes with 37 out of 164 evaluable regions harboring metastases. On a per-patient analysis, PET-MRI had a sensitivity/specificity of 79/100% with a PPV/NPV of 100/77%. On a per-region analysis (n = 164) these figure were 65/99% and 96/91%, respectively. Conclusions: Combined DW-MRI and fCH PET/CT has a very high positive predictive value in high risk prostate cancer patients. If confirmed in larger series a positive combined scan may safely allow cancellation of surgical staging in selected patients, depending on local protocols in N1 M0 patients.

关键词： Positron Emission Tomography Diffusion-Weighted Imaging fluor-Methyl-Choline Prostate Cancer Primary Staging

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液体氦的λ现象和玻色-爱因斯坦凝聚

北京大学学报（自然科学版） 2002年第B12期38卷 38-41,119页

作者： f.伦敦阎守胜 Henri Poicare研究所

Implementation of a faraday rotation diagnostic at the OMEGA laser facility

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High Power Laser Science and Engineering 2018年第3期6卷 102-111页

作者： A.Rigby J.Katz A.f.A.Bott T.G.White P.Tzeferacos D.Q.Lamb D.H.froula G.Gregori Department of Physics University of Oxford Parks Road Oxford OX1 3PU UK Laboratory for Laser Energetics University of Rochester 250 E. River Rd Rochester NY 14623 USA Department of Physics University of Nevada Reno NV 89557 USA Department of Astronomy and Astrophysics University of Chicago 5640 S. Ellis Ave Chicago IL 60637 USA

Magnetic field measurements in turbulent plasmas are often difficult to perform. Here we show that for kG magnetic fields, a time-resolved faraday rotation measurement can be made at the OMEGA laser facility. This diagnostic has been implemented using the Thomson scattering probe beam and the resultant path-integrated magnetic field has been compared with that of proton radiography. Accurate measurement of magnetic fields is essential for satisfying the scientific goals of many current laser–plasma experiments.

关键词： alignment controls diagnostics high energy density physics high power laser laser-plasma interaction

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托业听力本领书

Anisotropic Electroplastic Effects on the Mechanical Properties of a Nano-Lamellar Austenitic Stainless Steel

丛书名：国际交流英语考试标准版

2003年

作者： [美]赖特（Wright A.f.）

本书囊括TOEIC听力测验4大题型，提供400道精华练习题。题型、题量、难度最符合考试需要，与考试绝不脱节。答题技巧与应试秘决大公开，用最短的时间，挑战最不可能的任务。

ISBN: (纸本)7111116666

关键词：商务语言文字图书馆

来源：畅想之星图书光盘版（南... 评论

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Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 534-542页

作者： Y.R.Ma H.J.Yang D.D.Ben X.H.Shao Y.Z.Tian Q.Wang Z.f.Zhang Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Sciences and Technology of ChinaHefei230026China Shenyang National Laboratory of Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110016China

Effects of electropulsing treatment(EPT)on the microstructural evolution and mechanical properties of a cold-rolled 316 L austenitic stainless steel with nano-lamellar structure were *** EPT experiments were carried out with the electric current direction along the rolling direction(RD)and the transverse direction(TD)of the samples,*** anisotropic electroplastic effects for the RD and TD specimens,i.e.,reduced hardness/strength and enhanced ductility,were obtained owing to the different recrystallization behaviors of the RD and TD specimens during *** RD specimens after EPT with larger recrystallized grain size and higher volume fraction of recrystallization show lower strength and higher elongation than that of the TD *** main reason might be attributed to the change of the current direction in the two kinds of samples,which results in the different sensitivity of the microstructures to thermal and athermal effects during EPT.

关键词： Stainless steel Electroplastic effect Electropulsing Recrystallization Anisotropy Strength Plasticity

Could wastewater analysis be a useful tool for China?——A review

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Journal of Environmental Sciences 2015年第1期27卷 70-79页

作者： Jianfa Gao Jake O'Brien foon Yin Lai Alexander L.N.van Nuijs Jun He Jochen f.Mueller Jingsha Xu Phong K.Thai faculty of Science and Engineering University of Nottingham Ningbo China National Research Centre for Environmental Toxicology The University of Queensland Toxicological Center University of Antwerp

Analysing wastewater samples is an innovative approach that overcomes many limitations of traditional surveys to identify and measure a range of chemicals that were consumed by or exposed to people living in a sewer catchment area. first conceptualised in 2001, much progress has been made to make wastewater analysis（WWA） a reliable and robust tool for measuring chemical consumption and/or exposure. At the moment, the most popular application of WWA, sometimes referred as sewage epidemiology, is to monitor the consumption of illicit drugs in communities around the globe, including China. The approach has been largely adopted by law enforcement agencies as a device to monitor the temporal and geographical patterns of drug consumption. In the future, the methodology can be extended to other chemicals including biomarkers of population health（e.g. environmental or oxidative stress biomarkers, lifestyle indicators or medications that are taken by different demographic groups） and pollutants that people are exposed to（e.g. polycyclic aromatic hydrocarbons,perfluorinated chemicals, and toxic pesticides）. The extension of WWA to a huge range of chemicals may give rise to a field called sewage chemical-information mining（SCIM） with unexplored potentials. China has many densely populated cities with thousands of sewage treatment plants which are favourable for applying WWA/SCIM in order to help relevant authorities gather information about illicit drug consumption and population health status. However, there are some prerequisites and uncertainties of the methodology that should be addressed for SCIM to reach its full potential in China.

关键词： Drug consumption Wastewater analysis Biomarkers Population health