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Low-Carbon,Mn-Si Cast Steel Structure Modification by Fluidized Bed Heat Treatment

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Journal of Iron and Steel Research International 2011年第S1期18卷 541-545页

作者： Jasiński Józef Podsiad Piotr Jasiński Jaroslaw bul Arnold Kaczmarczyk Andrzej Czestochowa University of Technology Materials Science InstituteArmii Krajowej Av.1942-200 CzestochowaPoland HSW Stalowa Wola E.Kwiatkowskiego St.137-450 Stalowa WolaPoland

The effect of fluidized bed heat treatment (FBHT) on low-carbon Mn-Si cast steel strength properties improvement,strictly ductility is shown in this *** bed heat treatment variants are chosen in order to eliminate the structure defaults after a crystallization *** parameters are set considering an initial state material chemical composition,structure morphology and application criterion after heat *** results are verified according with the standard BS 3100:1991 *** bed heat treatment variants are chosen mainly in order to the Widmanst tten ferrite structures elimination,carbides morphology modification and matrix optimum performance properties *** ZG35SiMn (EN:L30GS) FBHT processes results are verified by the metallographic researches,hardness/microhardness measurements and tensile strength examination.

关键词： cast steel heat treatment modification fluidized bed

LIMIT CYCLES AND INVARIAnt PARABOLA IN A KUKLES SYSTEM OF DEGREE THREE

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Acta Mathematica Scientia 2008年第4期28卷 865-869页

作者：刘振海 E.Sáez I.Szántó Department of Mathematics Changsha University of Sciences and Techndogy Departamento de Matemática Universidad Tcnica Federico Santa MariaCasilla 110-VValparaisoChile

In this article,the authors consider a class of Kukles planar polynomial differential system of degree three having an invariant *** this class of second-order differential systems,it is shown that for certain values of the parameters the invariant parabola coexists with a *** other values it can coexist with one,two or three small amplitude limit cycles which are constructed by Hopf *** result gives an answer for the question given in[4],about the existence of limit cycles for such class of system.

关键词： Kukles system limit cycles invariant algebraic curves

Choice of Adaptation Strategies to Climate Variability among Smallholder Farmers in the Maize Based Cropping System in Namutumba District, Uganda

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American Journal of Climate Change 2018年第3期7卷 431-451页

作者： bul John Ajak Florence Birungi Kyazze Paul Isolo Mukwaya Department of Extension and Innovation Studies College of Agricultural and Environmental Sciences Makerere University Kampala Uganda Department of Geography Geo-Informatics and Climatic Sciences School of Forestry Environment and Geographical Sciences College of Agricultural and Environmental Sciences Makerere University Kampala Uganda

Smallholder farmers in Namutumba district draw on a combination of adaptation strategies to respond to effects of climate variability. However, there is limited scholarly evidence and explanation that has been conducted on the factors that influence the choice of alternative sets of strategies that smallholder farmers use in response to climate variability specific stress and literature that disentangles climatic stressors specific adaptation options. A multi-stage sampling procedure was employed to select the study area and household respondents. The study used cross-sectional research design to collect both quantitative and qualitative data. Household data was collected from 160 respondents with a structured questionnaire supported by key informant interviews. Multinomial logit modeling (MNL) was used to determine the relative influence of selected household socio-demographic factors on the choice of adaptation strategies against the dry spell. Principal Components Analysis (PCA) was used to create weighted adaptation index for categorizing various similar adaptation strategies. In order to respond to the impact of climate variability stresses, smallholder farmers have adapted growing drought-resistant crops (12.2%), extension of the agricultural frontier into wetlands during the dry spells (37%), whereas use of crop rotation (9.8%) is the most dominant strategies used to manage pest and diseases, similarly soil and water conservation (15.3%) and climate-smart planning basin (11%) are the most dominant adaptation strategies use to manage flood. Empirical results from multinomial logit modeling showed that predictor variables gender, level of education, years of farming, house size, access to credit, and own radio have a significant influence on the choice of adaptation strategies with differences significant level during the dry spell. The study recommends that future policies should focus on strengthening the existing extension training package, strengthening the

关键词： Choice Climate Variability Smallholder Farmers Adaptation Strategies Dry Spell and Namutumba

Scientometrics: untangling the topics

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National Science Review 2014年第3期1卷 343-345页

作者： ádám Szántó-Várnagy Péter Pollner Tamás Vicsek Illés J. Farkas Institute of Physics Eotvos University

Measuring science is based on comparing articles to similar ***,keyword-based groups of thematically similar articles are dominantly *** small sizes keep the statistical errors of comparisons *** the growing availability of bibliographic data,such statistical errors can be reduced by merging methods of thematic grouping,citation networks and keyword

关键词： untangling the topics Scientometrics APS ERC than

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用TMP—SMP加利福平治疗儿童布氏菌病

地方病译丛 1994年第4期15卷 21-24页

作者： bul.,NAK 白常乐

Composition of Hydrocarbons in Diamonds, Garnet, and Olivine from Diamondiferous Peridotites from the Udachnaya Pipe in Yakutia, Russia

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Engineering 2019年第3期5卷 471-478页

作者： Nikolay V. Sobolev Anatoly A. Tomilenko Taras A. bul’bak Alla M. Logvinova V.S. Sobolev Institute of Geology and Mineralogy Siberian Branch of the Russian Academy of Sciences Novosibirsk 630090 Russia Department of Geology and Geophysics Novosibirsk State University Novosibirsk 630090 Russia

Volatile components in diamonds, associated garnet (pyrope), and olivine from two extremely rare xenoliths of diamondiferous peridotites recovered from the Udachnaya kimberlite pipe in Yakutia, Russia, were analyzed by gas chromatography–mass spectrometry (GC–MS) using a Focus DSQ II Series Single Quadrupole GC–MS (Thermo Scientific, USA). These xenoliths are pyrope lherzolite and pyrope dunite based upon compositions of coexisting minerals. Unlike the pyrope lherzolite, which contained pyrope with moderate calcium (Ca)-component content (about 15 mol%), the dunite contained subcalcic chromium (Cr)-pyrope with low Ca-component content (less than 10 mol%). All investigated minerals contained dominating hydrocarbons and their derivatives represented by aliphatic (paraffins, olefins), cyclic (naphthenes, arenes), oxygenated (alcohols, ethers), and heterocyclic (dioxanes, furans) hydrocarbons;nitrogenated, chlorinated, and sulfonated compounds;carbon dioxide (CO2);and water (H2O). The relative concentration (rel%) of total hydrocarbon was 79.7 rel% for diamonds, 69.1 rel% for garnet, and 92.6 rel% for olivine, with a general amount of components ranging from 161 to 206. New data on volatiles in diamonds, associated garnet, and olivine suggest the presence of a wide spectrum of hydrocarbons along with nitrogen (N2), CO2, and H2O in some upper mantle areas.

关键词： Diamond Volatiles Hydrocarbons Pyrope Olivine Inclusions

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输尿管肿瘤的激光治疗

中华泌尿外科杂志 1989年第1期10卷 47-50页

作者： Schm.,nt 史时芳联邦德国吕贝克医科大学泌尿科浙江医科大学附属第一医院泌尿外科

本文报道输尿管镜下激光治疗输尿管肿瘤20例,其中4例因估计治疗不彻底且活检报告为浸润性低级肿瘤,故随后作了输尿管部分切除术或肾输尿管全长切除术。余16例中8例为单纯性激光治疗,8例为激光加电切,均顺利切除肿瘤,病理报告属 Ta、T1及... 详细信息

本文报道输尿管镜下激光治疗输尿管肿瘤20例,其中4例因估计治疗不彻底且活检报告为浸润性低级肿瘤,故随后作了输尿管部分切除术或肾输尿管全长切除术。余16例中8例为单纯性激光治疗,8例为激光加电切,均顺利切除肿瘤,病理报告属 Ta、T1及 G1、G2。3例分别于术后12、24和49月复发,但因复发肿瘤很小,再次用激光烧灼处理。术后并发输尿管狭窄4例,1例于单纯激光照射后,3例于激光加电切后。输尿管肿瘤窥镜下激光照射是一种有前途的治疗方法。作者对操作方法和适应证等作了详细介绍和讨论。

关键词：输尿管肿瘤激光

Evaluation of CA125 and nt-proBNP values in patients undergoing transcatheter aortic valve implantation

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Journal of Geriatric Cardiology 2015年第2期12卷 100-106页

作者： Huseyin ayhan Haca Ahmet Kasapkara Tahir Durmaz Telat Keles Cenk San Serdal Bastug Kemal Esref Erdogan Nihal Akar Bayram Emine Bilen Murat Akgay Engin Bozkurt Faculty of Medicine Department of Cardiology Ytldtrtm Beyaztt University Ankara 06800 Turkey Department of Cardiology Ankara Ataturk Education and Research Hospital Ankara 06800 Turkey Faculty of Medicine Department of Cardiovascular Surgery Yddtrtm Beyaztt University Ankara 06800 Turkey

Background Transcatheter aortic valve implantation （TAVI） is a minimally invasive, emerging therapy in surgically high risk, or in- operable patients. Parameters used for risk classification have some deficiencies in the selection of patients. The objective of this study is to evaluate the impact of TAVI on carbohydrate antigen 125 （CA125） and N-terminal pro brain-type natriuretic peptide （nt-proBNP） as biomarkers that have been used frequently in recent years, and also the relationship of these biomarkers to prognosis. Methods ＆ Results Transcatheter aortic valve implantation was practiced on 31 patients in this study. Then, CA125 and nt-proBNP levels studied in patients prior to and after the TAVI were evaluated. The patients were also grouped in accordance with their left ventrieular ejection fraction （LVEF） and CA125 levels （LVEF 〉 40% and 〈 40%; CA125 ≤ 35 U/L and 〉 35 U/L）. The TAVI operation was successfully performed in all patients. There was no in-hospital mortality and substantial improvement in functional capacity was detected at follow ups. In addition, a statistically significant decrease was detected in post-TAVI CA 125 and nt-proBNP levels of all patients （CA 125 83.8 ± 18.1 U/L vs. 64.3 ±14.2 U/L, P = 0.008; nt-proBNP： 4633.6± 627.6 pg/mL vs. 2866.3±536.8 pg/mL, P 〈 0.001）. In groups divided according to the CA125 levels, there was also statistically significant post-TAVI decline in CA125 levels. Within CA125 〉 35 U/L and LVEF 〈 40% groups, the permanent need for a pacemaker was required in one （3.2%） patient and mortality was observed in two （6.4%） patients after TAVI at follow up. Conclusions The results show that TAVI can be performed effectively and reliably in patients with high baseline levels of CA125 and nt-proBNP. These biomarkers are reduced substantially with TAVI, while high biomarker levels are associated with undesired events, and certainly, these biomarkers can be used for risk classifications in patient selection for TAVI.

关键词： B-type natriuretic peptide Biomarker Carbohydrate antigen Heart failure Transcatheter aortic valve implantation Risk score

Magnetic interaction in ultra-compact binary systems

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Research in Astronomy and Astrophysics 2009年第7期9卷 725-744页

作者： Kinwah Wu Mullard Space Science Laboratory University College London Holmbury St. Mary Surrey RH5 6NT United Kingdom

This article reviews the current works on ultra-compact double-degenerate binaries in the presence of magnetic interaction, in particular, unipolar induction. The orbital dynamics and evolution of compact white-dwarf pairs are discussed in detail. Models and predictions of electron cyclotron masers from unipolar-inductor compact binaries and unipolar-inductor white-dwarf planetary systems are presented. Einstein-Laub effects in compact binaries are briefly discussed.

关键词： stars binaries close - stars white dwarfs - gravitational waves - masers - radio continuum stars - X-rays binaries -- planetary systems