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Modification of Inclusions in Liquid Iron by Mg Treatment

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Journal of Iron and Steel Research International 2014年第S1期21卷 99-103页

作者： Tong-sheng ZHANG De-yong wang Chun-wei LIU mao-fa JIANG Ming L Bo wang Si-xun ZHANG Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education) Northeastern University Laiwu Steel Company Ltd.Shandong Iron & Steel Group Co. Ltd.

Effect of Mg addition on the compositions of inclusions were studied. The results show that Mg can minimize the inclusions of steel obviously. Under the present condition, Mg deoxidation products of low-S content experimental steel would be changed in the order of Al2O3→MgAl2O4→Mg–Al–O–S→Mg–O–S. Mg deoxidation products of high-S content experimental steel generate Mg–S(–O)+MnS type inclusions, except for usual oxysulfide. And it is consistent with the results of thermodynamics calculation. Mg is preferred to react with oxide, compared with sulfide. The reaction reaches the equilibrium after 1 min or 5 min. It shows that the number and diameter of inclusions in all experimental steel samples are well under control, helping to improve the properties of steel.

关键词： magnesium inclusion deoxidation desulfuration thermodynamic

Scheme for Generation of Maximally Entangled States via Entanglement Swapping

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Communications in Theoretical Physics 2006年第3X期46卷 553-555页

作者： WU Zhen-Zhen faNG mao-fa JIANG Chun-Lei College of Physics and Information Science Hunan Normal University Changsha 410081 China

Based on two atoms and two cavities initially in two pairs of atom-photon nonmaximally entangled states, we propose a relatively simple scheme to create maximally entangled photon-photon and atom-photon states via entanglement swapping using techniques of cavity QED inspired by the scheme proposed in [Phys. Rev. A 71 （2005） 044302] and [Phys. Rev. A 71 （2005） 034312]. Our scheme does not involve the measurement in Bell basis, we only require detecting the states of atoms.

关键词： quantum entanglement entanglement swapping cavity QED

内镜下黏膜切除术治疗消化道难治性息肉患者的疗效研究

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四川生理科学杂志 2024年第5期46卷 1050-1052页

作者：毛璐高瑞华李发印郑州市金水区总医院消化内科河南郑州450000

目的:探究内镜下黏膜切除术治疗消化道难治性息肉患者疗效。方法:回顾性收集本院2021年9月至2023年9月期间收治的89例消化道难治性息肉患者临床资料,依据不同手术方法分为对照组(行内镜下高频电切术,n=44)和研究组(行内镜下黏膜切除术,n... 详细信息

目的:探究内镜下黏膜切除术治疗消化道难治性息肉患者疗效。方法:回顾性收集本院2021年9月至2023年9月期间收治的89例消化道难治性息肉患者临床资料,依据不同手术方法分为对照组(行内镜下高频电切术,n=44)和研究组(行内镜下黏膜切除术,n=45)。比较两组手术指标和术后消化道功能,手术前后以酶联免疫法检白细胞介素-12(Interleukin-12,IL-12)、白细胞介素-17(Interleukin-17,IL-17)、白细胞介素-1β(Interleukin-1β,IL-1β)水平;以视觉模拟评分(Visual analogue scales,VAS)评估疼痛程度,于术后统计两组并发症。结果:与对照组相比,研究组住院时间、出血量均显著减少(P0.05)。结论:消化道难治性息肉患者行内镜下黏膜切除术能促进消化道功能恢复,减轻机体炎症反应,减轻术后疼痛感,促进患者快速恢复。

关键词：消化道难治性息肉炎症因子消化道功能高频电切术黏膜切除术

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大气湍流对高分辨率遥感卫星的成像影响研究

中国光学（中英文） 2024年第1期17卷 167-177页

作者：毛红敏丁致雅杨燕燕江苏奇彭建涛曹楠胡立发曹召良苏州科技大学物理科学与技术学院江苏苏州215009 江苏省微纳热流技术与能源应用重点实验室江苏苏州215009 江南大学理学院江苏无锡214122 中国航天科技集团公司上海卫星工程研究所上海201109

遥感卫星在国防和民用探测等领域发挥着重要作用,而大气湍流严重影响高分辨率遥感卫星的成像质量。本文重点研究了遥感卫星对地探测时,相机口径、卫星轨高和大气湍流强度对空间相机成像质量的影响。首先,基于球面波传输模型和Kolmogoro... 详细信息

遥感卫星在国防和民用探测等领域发挥着重要作用,而大气湍流严重影响高分辨率遥感卫星的成像质量。本文重点研究了遥感卫星对地探测时,相机口径、卫星轨高和大气湍流强度对空间相机成像质量的影响。首先,基于球面波传输模型和Kolmogorov湍流理论,针对空对地探测湍流波前进行仿真。然后,分析畸变波前随相机口径、卫星轨高和大气相干长度的变化规律,并推导出普适公式。在此基础上,进一步推导出空间相机成像分辨率随相机口径、卫星轨高和大气相干长度变化的计算公式。最后,研究了大气湍流对空间相机调制传递函数(MTF)的影响,并以MTF=0.15为基准,仿真分析了MTF相对误差随相机口径、卫星轨高和大气相干长度的变化规律。本研究为高分辨率遥感卫星的设计、分析和评估提供理论依据。

关键词：高分辨率卫星大气湍流空对地观测成像质量

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甲螨的研究进展及展望

贵州大学学报（农业与生物科学版） 2002年第5期21卷 368-374页

作者：张燕金道超杨茂发王慧芙贵州大学农学院植保系贵州贵阳550025 中国科学院动物研究所北京100080

甲螨是一类常见的土壤动物 ,其活动对自然界中有机质的分解和能量的循环极为重要 ,并且在一定程度上影响人类的生产 ,因此对甲螨进行研究具有重要意义。本文在广泛收集国内外资料的基础上介绍了甲螨分类学、生态学、环境甲螨及农业甲螨... 详细信息

甲螨是一类常见的土壤动物 ,其活动对自然界中有机质的分解和能量的循环极为重要 ,并且在一定程度上影响人类的生产 ,因此对甲螨进行研究具有重要意义。本文在广泛收集国内外资料的基础上介绍了甲螨分类学、生态学、环境甲螨及农业甲螨的研究发展状况 ,并对甲螨研究发展趋势进行了讨论 ,指出甲螨的现有研究虽然已涉及到应用方面 ,但仍主要集中在分类、生态的理论研究 ,而且多采用传统的研究方法。今后的研究 ,应不断引入新技术、新方法 ,在继续加强原有研究的同时。

关键词：甲螨分类学生态学环境影响农业虫害

Automatic Road Extraction Using Particle Filters from High Resolution Images

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Journal of China University of Mining and Technology 2006年第4期16卷 490-493页

作者： YE fa-mao SU Lin TANG Jiang-long Department of Computer Science and Engineering Nanchang University Nanchang Jiangxi 330029 China Institute of Remote Sensing Applications Chinese Academy of Sciences Beijing 100101 China East China Institute of Technology Fuzhou Jiangxi 344000 China

Road extraction plays an important role in many applications such as car navigation, but the manual extraction of roads is a laborious, tedious task. To speed the extraction of roads, an approach based on particle filtering to extract automatically roads from high resolution imagery is proposed. Particle filtering provides a statistical framework for propagating sample-based approximations of posterior distributions and has almost no restriction on the ingredients of the model. We integrate the similarity of grey value and the edge point distribution of roads into particle filtering to deal with complex scenes. To handle road appearance changes the tracking algorithm is allowed to update the road model during temporally stable image observations. A fully automatic initialization strategy is used. Experimental results show that the proposed approach is a promising and fully automatic method for extracting roads from images, even in the presence of occlusions.

关键词： road extraction particle filters high resolution images

Dynamic changes of IL-2/IL-10, sfas and expression of fas in intestinal mucosa in rats with acute necrotizing pancreatitis

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World Journal of Gastroenterology 2008年第14期14卷 2246-2250页

作者： Sheng-Chun Dang Jian-Xin Zhang Jian-Guo Qu Zheng-fa mao Xu-Qing wang Bei Zhu Department of General Surgery The Affiliated Hospital of Jiangsu University Zhenjiang 212001 Jiangsu Province China

AIM:To investigate dynamic changes of serum IL-2, IL-10, IL-2/IL-10 and sfas in rats with acute necrotizing pancreatitis. To explore the expression of fas in intestinal mucosa of rats with acute necrotizing pancreatitis (ANP). METHODS:A total of 64 Sprague-Dawley (SD) rats were randomly divided into two groups:normal control group (C group), ANP group (P group). An ANP model was induced by injection of 50 g/L sodium taurocholate under the pancreatic membrane. Normal control group received isovolumetric injection of 9 g/L physiological saline solution using the same method. The blood samples of the rats in each group were obtained via superior mesenteric vein to measure levels of IL-2, IL-10, sfas and calculate the value of IL-2/IL-10. The levels of IL-2, IL-10 and sfas were determined by ELISA. The severity of intestinal mucosal injury was evaluated by pathologic score. The expression of fas in intestinal mucosal tissue was determined by immunohistochemistry staining. RESULTS:Levels of serum IL-2 were significantly higher in P group than those of C group (2.79 ± 0.51 vs 3.53 ± 0.62, 2.93 ± 0.89 vs 4.35 ± 1.11, 4.81 ± 1.23 vs 6.94 ± 1.55 and 3.41 ± 0.72 vs 4.80 ± 1.10, respectively, P 0.05). In sfas assay, there was no significant difference between P group and C group (3.16 ± 0.75 vs 3.31 ± 0.80,

关键词： Acute necrotizing pancreatitis fas Intestinal mucosal injury T helper cell

富里酸改性FeMnNi-LDH对砷镉污染土壤的钝化修复

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中国环境科学 2024年第4期44卷 2184-2197页

作者：何雅馨魏世强蒋珍茂西南大学资源环境学院重庆市农业资源与环境研究重点实验室重庆400715

选用腐殖质活性组分富里酸(fa)作为铁锰镍层状双氢氧化物(FeMnNi-LDH)的修饰物,采用共沉淀法制备出稳定层状fa@FeMnNi-LDH复合材料,并运用于As(Ⅲ)和Cd(Ⅱ)复合污染土壤的钝化修复.通过小白菜盆栽实验研究了在不同砷镉复合污染水平及不... 详细信息

选用腐殖质活性组分富里酸(fa)作为铁锰镍层状双氢氧化物(FeMnNi-LDH)的修饰物,采用共沉淀法制备出稳定层状fa@FeMnNi-LDH复合材料,并运用于As(Ⅲ)和Cd(Ⅱ)复合污染土壤的钝化修复.通过小白菜盆栽实验研究了在不同砷镉复合污染水平及不同初始土壤pH值条件下,复合材料对土壤As(Ⅲ)和Cd(Ⅱ)的钝化效果、各形态含量变化及对小白菜根部和地上部As(Ⅲ)和Cd(Ⅱ)转运、富集系数的影响,并进行相关性分析.结果表明,fa@FeMnNi-LDH复合材料对As和Cd具有显著的同步钝化效果.当复合材料添加量由0%增加到1.0%,促进了土壤非专性吸附态和结晶铁铝氧化物结合态As向专性吸附态、无定型铁铝氧化物结合态和残渣态As转化,土壤可交换态Cd主要向残渣态、碳酸盐结合态、铁锰氧化物结合态和有机结合态Cd转化;土壤初始pH对As和Cd的钝化效果影响明显,酸性和中性土壤的pH分别增加了1.65和0.64个pH单位,土壤有效态As的降低率分别达到69.74%和63.31%,有效态Cd的降低率分别为60.25%和61.78%;小白菜的鲜重和株高随复合材料添加量的增加而提高,并且复合材料添加量的增加降低了小白菜各部位对As和Cd的转运和富集系数,使小白菜地上部As、Cd的浓度均低于国家食品安全标准限值.相关性分析显示,非专性吸附态As、可交换态Cd与土壤pH值呈极显著负相关性,残渣态As和Cd与土壤pH呈现极显著正相关,小白菜地上部分和根部中As和Cd的含量与土壤残渣态As和Cd呈极显著负相关关系.fa@FeMnNi-LDH复合材料能提高土壤pH值,促进土壤As和Cd向残渣态的转化,从而降低土壤As和Cd生物有效性和在小白菜植株中的累积,为土壤中As(Ⅲ)和Cd(Ⅱ)复合污染的同步修复提供了新的参考.

关键词：层状双金属氢氧化物(LDH) 富里酸(fa) 改性砷镉复合污染土壤钝化修复

Effect of Mg Addition on Nucleation of Intra-granular Acicular Ferrite in Al-killed Low Carbon Steel

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Journal of Iron and Steel Research International 2016年第5期23卷 415-421页

作者： Xiao-bing LI Yi MIN Zhe YU Cheng-jun LIU mao-fa JIANG Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern University

To verify the formation behaviors and mechanisms of intra-granular acicular ferrite（ IAF） grains nucleated by Mg-Al-O in low carbon steel,the steels containing different Mg contents were refined in a vacuum induction furnace. The effect of Mg addition on the formation of IAF structure in Al-killed low carbon steel was investigated by optical microscope（ OM） and scanning electron microscope with energy dispersive X-ray spectroscope（ SEM-EDX）. It reveals that the IAFs are only detected in Mg-added steels,and the volume fraction of IAF increases with the Mg concentration from 8 × 10^（-6） to 26 × 10^（-6）. It shows that not only the MgO-Al_2O_3-MnS and MgO-Al_2O_3-P_2O_5 particles are the effective nucleation sites for IAF,but also the pure MgO·Al_2O_3 phase can promote the ferrite nucleation. A Mn-depletion zone（ MDZ） is characterized adjacent to the MgO-Al_2O_3-MnS,which is believed to be one of the possible mechanisms to explain the IAF nucleation. The MDZ around the MgO-Al_2O_3-MnS inclusion would be induced by the Mn S precipitation on the inclusion. It seems that the ability of Mg-containing inclusions to induce the nucleation of ferrite might be attributed to a new mechanism,i. e.,the Prich zone formed on a few Mg-Al-O inclusions might be another factor for promoting the IAF formation.

关键词： low carbon steel inclusion magnesium intra-granular acicular ferrite Mn-depletion zone