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锰在BaO－BaF_2－MnO熔剂和锰铁熔体间的平衡

第六届材料与热加工物理模拟及数值模拟国际会议

作者： LIU Sheng-xin 1,2,MIAO Jin-Qi 1,LIU Guo-quan 3,YAN xin-qi 1,ZHANG Yong-gang 4,Huang Jian-kai 4(1.School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450002,P r china 2.Henan Zhongyuan combustion Engine company,Ltd.,Mengzhou 454750,P r china 3.School of Materials Science and Engineering,University of Science and Technology Beijing,100083,P r china 4.Wuxi Seamless Steel Tube company,Ltd.,Wuxi 214026,P r china)

The precipitates composition,mass percent and particle size distribution in medium carbon V-Ti-N microalloyed steel during different sub-processes of N80 grade hot rolling seamless oil well tubes have been investigated by chemical phase analysis,small-angle x-ray scattering,.The results show that there are mainly nano-scaled Mc and iron carbon precipitates in the above *** type,mass percent and particle size distribution of the precipitates vary with the steel hot working history,especially the controlled cooling *** vanadium precipitation characteristic during the sub-procedures after rolling has notable influence on the metastable iron carbon precipitates which can reflect the homogeneity of austenite *** particles containing vanadium are further formed in the reheating procedure when the controlled cooling temperature is 600℃,which is beyond the expectation of production line *** cooling to 600 ℃ and air cooling after stretch-reduction-diameter deformation promote the formation of c-rich V（c,N） and iron carbon particles with size less than 36 nm,leading to the reduction the carbon and alloy elements in austenite,which promote the intergranular ferrite *** contribution of nano-scaled iron carbon precipitate and the interaction with Mc particles in medium carbon microallyed steel should be further studied.

关键词： nano-scaled precipitate microalloyed steel intergranular ferrite chemical phase analysis phase transformation

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铁合金 1996年第2期27卷 46-53页

作者： LIU,x 索淑芬瑞典皇家技术协会冶金工艺部

在１５７３－１６７３Ｋ时测定了锰在ＢａＯ－ＢａＦ_２和Ｍｎｏ渣和Ｍｎ（６２－７３％）－Ｆｅ－Ｃ饱和熔体之间的平衡分配比．研究了渣的成分、氧分压和温度对标分配比的影响，发现锰的平衡分配比是随着氧分压和渣中ＢａＯ含量的增... 详细信息

在１５７３－１６７３Ｋ时测定了锰在ＢａＯ－ＢａＦ_２和Ｍｎｏ渣和Ｍｎ（６２－７３％）－Ｆｅ－Ｃ饱和熔体之间的平衡分配比．研究了渣的成分、氧分压和温度对标分配比的影响，发现锰的平衡分配比是随着氧分压和渣中ＢａＯ含量的增加而增加．在氧分压较高时．向ＢａＯ－ＭｎＯ渣中附加ＢａＦ２，为减少镜的损失和使锰铁脱磷能够进行提供了有利条件．在氧分压一定时，在渣与碳饱和的镜铁平衡时，ＢａＯ与ＭｎＯ的摩尔分数比是随着渣中ＢａＯ的增加而减少的．温度高导致锰的分配比低．对于ＢａＯ（５０％）－ＢａＦ２（４７％）－ＭｎＯ（３％）渣；温度对锰容量的影响可以表示为：Ｎｎ（１）十１／２０２＝（ＭｎＯ）这个反应热。

关键词：锰铁冶炼熔剂熔体平衡锰

药物治疗胃溃疡疗效、安全性及药物经济学评价

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中国继续医学教育 2017年第21期9卷 156-158页

作者：解学慧扬州洪泉医院药房江苏扬州225200

目的对泮托拉唑和奥美拉唑治疗胃溃疡的效果以及药物经济学进行分析评价。方法研究样本为68例胃溃疡患者,随机分为两组,A组行泮托拉唑治疗,B组行奥美拉唑治疗,对治疗效果、不良反应以及药物经济学进行分析评价。结果 A组患者的治疗有效... 详细信息

目的对泮托拉唑和奥美拉唑治疗胃溃疡的效果以及药物经济学进行分析评价。方法研究样本为68例胃溃疡患者,随机分为两组,A组行泮托拉唑治疗,B组行奥美拉唑治疗,对治疗效果、不良反应以及药物经济学进行分析评价。结果 A组患者的治疗有效率为91.18%,B组为94.12%,组间对比,差异无统计学意义(P>0.05);A组中2例(5.88%)患者出现恶心呕吐;B组中有3例(8.82%),组间对比,差异无统计学意义(P>0.05);A组c/E值为22.85;B组c/E值为33.47,组间对比,差异具有统计学意义(P<0.05)。结论采用泮托拉唑治疗胃溃疡效果明显,患者不良反应低且药物更为经济。

关键词：泮托拉唑奥美拉唑胃溃疡安全性经济学

The Modulation Effect of Triglyceride Type and Phospholipids Type ω-3 LcPUFA on Mice Gut Microbiota

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Journal of Biosciences and Medicines 2017年第9期5卷 54-64页

作者： x. Wang F. Liu Y. M. Wang c. H. xue Q. J. Tang college of Food Science and Engineering Ocean University of China Qingdao China

The evaluation from prospective cohort studies on the dietary ω-3 long-chain polyunsaturated fatty acid (LcPUFA) supplementation and nutritional value is consistent. However, the effect of different types of ω-3 long-chain PUFA (ω-3 LcPUFA) on microbiota in intestine is inconsistent. In this study, the mice were divided into three groups (N, PL, FO), with AIN-93M (N), AIN-93M + Phospholipids type ω-3 LcPUFA (PL) and AIN-93M + triglyceride type ω-3 LcPUFA (FO), respectively. Denaturing Gradient Gel Electrophoresis (DGGE) was used to detect the structure of intestinal microbiota. The data showed that the composition of gut microbiota was changed by treating with the two types of ω-3 LcPUFA. The results revealed that gut microbiota’ enrichment in FO group was decreased while in PL group was increased. The data also showed that the histological morphology of the small intestine in treated mice was improved especially in group PL, which was much more significant and suggested that Phospholipids type ω-3 LcPUFA is beneficial to intestinal health.

关键词： Phospholipids Type ω-3 LcPUFA Triglyceride Type ω-3 LcPUFA Gut Microbiota

Progress in china’s climate change study in the 20th century

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Journal of Geographical Sciences 2004年第S1期 5-13页

作者： ZHAI Panmao1,2, cHAO Qingchen1,2, ZOU xukai1,2(1. Laboratory for climate Studies, china Meteorological Administration, Beijing 100081, china 2. National climate center, china Meteorological Administration, Beijing 100081, china)

Studies on the 20th century climate change in china have revealed that under the background of global warming over the past century, climate in china has also experienced significant change with mean annual temperature increased by about 0.5 oc. More reliable results for the latter part of the 20th century indicate that the largest warming occurred in Northwest china, North china and Northeast china, and the warming in winter is most significant. Although no obvious increase or decrease trends were detected for mean precipitation over china in the past half century, regional differences are very distinct. In the middle and lower reaches of the Yangtze river, precipitation increased, while that in the Yellow river Basin markedly decreased. Studies suggest that climate change in china seems to be related not only with the internal factors such as ENSO, PDO, and the others, but also with the anthropogenic effects such as greenhouse gas emissions, and land use. The future climate change studies in china seem to be important in narrowing understanding the nature of china's climate change and its main causes, since it is significant for projection and for impact assessment of climate change in the future.

关键词： th century climate change china

Two-Layer Non-Hydrostatic Model for Generation and Propagation of Interfacial Waves

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china Ocean Engineering 2019年第1期33卷 65-72页

作者： S.r.Pudjaprasetya I.Magdalena Industrial and Financial Mathematics research Group Faculty of Mathematics and Natural SciencesInstitut Teknologi Bandung

When pycnocline thickness of ocean density is relatively small, density stratification can be well represented as a two-layer system. In this article, a depth integrated model of the two-layer fluid with constant density is considered,and a variant of the edge-based non-hydrostatic numerical scheme is formulated. The resulting scheme is very efficient since it resolves the vertical fluid depth only in two layers. Despite using just two layers, the numerical dispersion is shown to agree with the analytical dispersion curves over a wide range of kd, where k is the wave number and d the water depth. The scheme was tested by simulating an interfacial solitary wave propagating over a flat bottom, as well as over a bottom step. On a laboratory scale, the formation of an interfacial wave is simulated,which also shows the interaction of wave with a triangular bathymetry. Then, a case study using the Lombok Strait topography is discussed, and the results show the development of an interfacial wave due to a strong current passing through a sill.

关键词： interfacial waves two-layer non-hydrostatic model dispersion relation

电磁场作用下钢基自生复合材料c、Mn元素偏析及凝固组织

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上海交通大学学报 2003年第12期37卷 1850-1853页

作者：梁高飞许振明瞿迪柯施泱泱姜启川李建国上海交通大学材料科学与工程学院上海200030 吉林大学材料学院长春130025

研究了电磁场对团球γ+(Fe,Mn)3c共晶体增强奥氏体钢基自生复合材料(EAMc)中c、Mn元素的偏析及凝固组织的作用.结果表明,电磁场促进c、Mn元素的偏析;电磁场作用后,EAMc组织中的团球共晶体体积分数增加,在奥氏体基体中呈弥散分布;另外,... 详细信息

研究了电磁场对团球γ+(Fe,Mn)3c共晶体增强奥氏体钢基自生复合材料(EAMc)中c、Mn元素的偏析及凝固组织的作用.结果表明,电磁场促进c、Mn元素的偏析;电磁场作用后,EAMc组织中的团球共晶体体积分数增加,在奥氏体基体中呈弥散分布;另外,在基体内出现内生的奥氏体晶粒,这是由于电磁搅拌作用下,初生奥氏体晶粒在发展过程中分枝断裂所致.运用电磁场理论与非平衡凝固理论分析了电磁场对EAMc组织影响的机制:电磁场作用的热与搅拌效应可以减小溶质的有效分凝系数keff,为初生奥氏体(γ-Fe)枝晶的充分分枝提供了时空条件以及热力学与动力学条件,有利于团球共晶体的生成与体积分数的增加.

关键词：电磁场自生复合材料偏析显微结构