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Experimental Investigation on Viscosity of CaO-MgO(-Al_2O_3)-SiO_2 Slags and Solid-liquid Mixtures

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Journal of Iron and Steel Research International 2015年第12期22卷 1091-1097页

作者： Ji-fang XU li-juan su Dong CHEN Jie-yu ZHANG Yao CHEN Shagang School of Iron and Steel Soochow University Shanghai Key Laboratory of Modern Metallurgy and Material Processing Shanghai University

The viscosities for the selected CaO-MgO-SiO2 and CaO-MgO Al2 O3-SiO2 slags were measured by rota- ting cylinder method in a wide temperature range from 1608 K to 1 823 K. The effects of temperature, slag basicity and Al2 O3 content were studied. The results indicated that the viscosity decreased with increasing the slag basicity at the same temperature. And the viscosities of the slag initially increased linearly with increasing Al2 O3 content in the slags and then decreased as the Al2 O3 content in the slags continued to increase. Al2 O3 addition has a more signifi- cant effect on the viscosity than slag basicity in the selected slags. Based on the experimental data and the fraction of solid phases calculated by the thermodynamic software, the effect of solid phases on slag viscosity was evaluated. The results indicated that the relationship between the relative viscosity and the volume fraction of solid phases esti- mated from the slag composition can be reasonable by allowing the inverse maximum fraction of solid particles to vary.

关键词： viscosity slag solid-liquid mixture model Al2 O3 content

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Effects of Mg–Ca treatment and Ca treatment on impact toughness and morphology of sulfides in 45MnVS non-quenched and tempered steel

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Journal of Iron and Steel Research International 2024年第11期31卷 2755-2773页

作者： Tian-yin Zhan Jun Tian Xiang-long li li-juan su Dong Hou Tian-peng Qu De-yong Wang Shagang School of Iron and Steel Soochow UniversitySuzhou215137JiangsuChina The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081HubeiChina

An industrial experiment was conducted at a certain steel plant in China to compare and analyze the effects of Ca treatment and Mg–Ca treatment on inclusions in 45MnVS non-quenched and tempered steel. Through scanning electron microscopy-energy dispersive scanning analysis of the morphology and composition of inclusions, as well as Aspex quantitative analysis of their quantity, type and size, the formation mechanism of MnS–oxide (MnS inclusions with oxide cores) was intensively studied. The influence of sulfide morphology on the impact properties of steel was also analyzed. The results show that the quantity percentage of spindle-shaped sulfides in Ca-treated steel is 19.99%, and that in Mg–Ca-treated steel is 35.38%. Compared with Ca-treated steel, there are more MnS–oxide inclusions in Mg–Ca-treated steel. Controlling the content of Ca and Mg in the oxide core of MnS–oxide inclusion above 10 wt.% and the area ratio below 5 would contribute to the formation of spindle-shaped inclusions after rolling. The mismatch between MnS and oxides decreases with the increase in MgO content in the oxides, which is beneficial to nucleation and precipitation of MnS with this type of oxides as the core. Under the same deformation conditions, the size of sulfide does not affect its aspect ratio. Under the experimental conditions, the inclusion containing a certain amount of MgO can enhance its sulfur capacity, facilitating the formation of composite sulfides. The transverse impact energy of Ca-treated steel is 25.785 J, and that of Mg–Ca-treated steel is 32.119 J. Compared with the traditional Ca-treatment, Mg–Ca treatment can increase the number of spindle-shaped sulfides in the steel, thereby improving the transverse impact toughness of the steel and reducing the anisotropy of the mechanical properties of the material.

关键词： Non-quenched and tempered steel Calcium treatment Magnesium-calcium treatment sulfide Impact toughness Morphology

Interface characteristics between TiN and matrix and their effect on solidification structure

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Journal of Iron and Steel Research International 2021年第9期28卷 1149-1158页

作者： Tian-peng Qu De-yong Wang Hui-hua Wang Dong Hou Jun Tian Shao-yan Hu li-juan su Shagang School of Iron and Steel Soochow UniversitySuzhou215021JiangsuChina

Heterogeneous nucleation is an effective way to promote the dispersion and precipitation of second-phase particles in steel and refine the grain size of the solidification *** only refining as-cast structure grain size,but TiN in ferritic stainless steel can also pin grain boundaries and restrain the overgrowth of grains during *** interface characteristics between TiN and heterogeneous phases(high-melting inclusions and ferrite phase)were studied based on the wetting angles between molten steel with different compositions and TiN substrate,and on the matching degree between TiN and ferrite *** was found that,for the molten steel with the same composition,the wetting angle with the TiN substrate was significantly smaller than the contact angles with the other three substrates,while the wetting angle between ferrite phase and TiN was the *** lattice matching was compared among MgAl_(2)O_(4),TiN andδmatrix by means of a high-resolution transmission electron microscope,which revealed that a coherent or semi-coherent interface was formed between the crystal plane(400)of MgAl_(2)O_(4)and the crystal plane(200)of TiN,as well as between the crystal plane(200)of TiN and the crystal plane(110)ofδmatrix,with a lattice misfit of 5.1%and 3.4%,***,these two characteristics between TiN and ferrite phase were both explained from the perspective of interfacial *** microstructure refinement mechanism from high temperature to room temperature can be better reflected by the proposed wetting–lattice misfit theory.

关键词： TiN Heterogeneous nucleation Interfacial wetting Lattice matching Grain refinement

Calibration and data restoration of light field modulated imaging spectrometer

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Chinese Physics B 2018年第8期27卷 179-186页

作者： li-juan su Qiang-Qiang Yan Yan Yuan Shi-Feng Wang Yu-Jian liu Key Laboratory of Precision Opto-mechatronics Technology of Ministry of Education Beihang UniversityBeijing 100191China Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences Xi＇an Institute of Optics and Precision MechanicsChinese Academy of SciencesXi ＇ an 710119China

A light field modulated imaging spectrometer （LFMIS） can acquire the spatial-spectral datacube of targets of interest or a scene in a single shot. The spectral information of a point target is imaged on the pixels covered by a microlens. The pixels receive spectral information from different spectral filters to the diffraction and misalignments of the optical components. In this paper, we present a linear spectral multiplexing model of the acquired target spectrum. A calibration method is proposed for calibrating the center wavelengths and bandwidths of channels of an LFMIS system based on the liner-variable filter （LVF） and for determining the spectral multiplexing matrix. In order to improve the accuracy of the restored spectral data, we introduce a reconstruction algorithm based on the total least square （TLS） approach. Simulation and experimental results confirm the performance of the spectrum reconstruction algorithm and validate the feasibility of the proposed calibrating scheme.

关键词： light field modulated imaging spectrometer linear-variable filter spectral calibration spectral re-construction

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Expression patterns and action analysis of genes associated with hepatitis virus infection during rat liver regeneration

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World Journal of Gastroenterology 2006年第47期12卷 7626-7634页

作者： li-juan su Guang-Wei Ding Zhi-li Yang Shou-Bing Zhang Yu-Xiu Yang Cun-Shuan Xu Faculty of life Science and Technology Ocean University of China Qingdao 260003 Shandong Province China College of life Science Henan Normal University Xinxiang 453007 Henan Province China Key Laboratory for Cell Differentiation Regulation Xinxiang 453007 Henan Province China

AIM： To study the action of hepatitis virus infectionassociated genes at transcription level during liver regeneration （LR）. METHODS： Hepatitis virus infection-associated genes were obtained by collecting the data from databases and retrieving the correlated articles, and their expression changes in the regenerating rat liver were detected with the rat genome 230 2.0 array. REsuLTS： Eighty-eight genes were found to be associated with liver regeneration. The number of genes initially and totally expressed during initial LR [0.5-4 h affer partial hepatectomy （PH）], transition from （30 to G1 （4-6 h affer PH）, cell proliferation （6-66 h after PH）, cell differentiation and reorganization of structurefunction （66-168 h after PH） was 37, 8, 48, 3 and 37, 26, 80, 57, respectively, indicating that the genes were mainly triggered at the early stage of LR （0.5-4 h after PH）, and worked at different phases. These genes were classified into 5 types according to their expression similarity, namely 37 up-regulated, 9 predominantly upregulated, 34 down-regulated, 6 predominantly downregulated and 2 up/down-regulated genes. Their total up- and down-regulation frequencies were 359 and 149 during LR, indicating that the expression of most genes was enhanced, while the expression of a small number of genes was attenuated during LR. According to time relevance, they were classified into 12 groups （0.5 and 1h, 2 and 4h, 6h, 8 and 12h, 16 and 96h, 18 and 24 h, 30 and 42 h, 36 and 48 h, 54 and 60 h, 66 and 72 h, 120 and 144 h, 168 h）, demonstrating that the cellular physiological and biochemical activities during LR were fluctuated. According to expression changes of the genes, their expression patterns were classified into 23 types, suggesting that the cellular physiological and biochemical activities during LR were diverse and complicated. CONCLUSION： The anti-virus infection capacity of regenerating liver can be enhanced and 88 genes play an important role in LR.

关键词： Partial hepatectomy Rat genome 230 2.0 array Hepatitis virus infection Genes associated with liver regeneration

Effects of Diets with Different Corn-to-Soybean Ratios on Performance of Lactational Rex Rabbits

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Animal Husbandry and Feed Science 2010年第1期2卷 24-26,31页

作者： suN li-na GU Zi-lin liU Ya-juan li su-min College of Animal Science & Technology Agricultural University of Hebei Baoding 071001 China

[ Objective] To study the effects of diets with different com-to-soybean ratios on production performance of lactational Rex rabbits and select the best feed formula. [Method] A total of 80 lactational healthy Rex rabbits （similar age, body weight and delivery time） were randomly divided into five groups, 16 in each group. The Rex rabbits in group I were fed with corn-based meal diet, group II with soybean-based meal diet, group III with the developed corn-soybean meal diet, group IV with corn-soybean meal free diet, and group CK with conventional corn-soybean meal diet. During the lactation period, the changes in the lactation performance, growth rate of baby rabbits, weight and feed costs were observed. [ Result] The lactation performance of mother rabbits and the growth rate of baby rabbits in the experimental groups were similar to that in the control group. The weaning survival rate of the group III was the highest, but it was not significantly higher than that of the control group. The weaning survival rate of the other three groups was lower than that of the control group （P〈0.05）. The weight loss of mother rabbits in the group I, II and III was not significantly different from that of the control group, but the weight loss of the group IV was higher than that of the control group （ P 〈 0.01 ）. [ Conclusion] Diets with appropriate corn-to-soybean ratios not only reduce feed costs but also give the best feeding effects.

关键词： Lactational Rex rabbits Lactation performance Growth rate Weight Feed costs

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惰气熔融-热导法测定烧结氮化硅中氮

冶金分析 2001年第2期21卷 1-3页

作者：朱跃进李素娟中国科学院金属研究所!辽宁沈阳110015

粉末压型烧结氮化硅样中氮和氧难以完全释放 ,其主要原因为烧结氮化硅样与粉末氮化硅样释放动力学条件不同。熔融提气过程中选用适当的浴料 ,可以提高氮氧的释放提取率。单元铁浴和铜浴可改善氮的释放情况 ,但分析时间长而拖尾。自行配... 详细信息

粉末压型烧结氮化硅样中氮和氧难以完全释放 ,其主要原因为烧结氮化硅样与粉末氮化硅样释放动力学条件不同。熔融提气过程中选用适当的浴料 ,可以提高氮氧的释放提取率。单元铁浴和铜浴可改善氮的释放情况 ,但分析时间长而拖尾。自行配制的五元浴不仅氮的释放提取率高 ,而且分析时间适中 ;其最终测试结果与化学法测定结果一致。惰气熔融法结合五元浴能够准确测定烧结氮化硅中氮。本文还对烧结氮化硅样中氧的联测结果进行了讨论。

关键词：惰气熔融-热导法烧结氮化硅五元浴氮

交联壳聚糖对常见金属离子的吸附性能及机理探讨

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冶金分析 2014年第9期34卷 58-65页

作者：邢云李素娟李步海安阳师范学院化学化工学院中南民族大学化学与材料科学学院

选用戊二醛为交联剂制备壳聚糖微球,用扫描电镜、红外和差示扫描量热仪等对产物进行了表征,研究了交联壳聚糖对常见金属离子的吸附行为。实验表明,吸附反应在20min内均可达到平衡;对Cd2+、Pb2+、Zn2+、Ag+、Co2+和Cu2+的平衡吸附容量分... 详细信息

选用戊二醛为交联剂制备壳聚糖微球,用扫描电镜、红外和差示扫描量热仪等对产物进行了表征,研究了交联壳聚糖对常见金属离子的吸附行为。实验表明,吸附反应在20min内均可达到平衡;对Cd2+、Pb2+、Zn2+、Ag+、Co2+和Cu2+的平衡吸附容量分别为15.5、38.5、7.9、22.4、27.2和12.6mg/g。同时利用XPS探讨了吸附机理,结果表明与重金属离子配位时,交联壳聚糖主要利用了分子中的—NH2或—OH基团。

关键词：壳聚糖金属离子吸附机理

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反思美国专业发展学校及其在我国的适切性

现代教育科学（高教研究） 2009年第1期 27-31页

作者：李素娟杭州师范大学教育科学学院

专业发展学校作为一种全新的教师教育模式,在美国取得了明显的教学效果,但其在发展过程中也存在一些值得我们深思的问题。我国的特殊国情对专业发展学校的办学条件、操作模式等方面有很多不适应的地方,因此,我们要理性地看待专业发展学... 详细信息

专业发展学校作为一种全新的教师教育模式,在美国取得了明显的教学效果,但其在发展过程中也存在一些值得我们深思的问题。我国的特殊国情对专业发展学校的办学条件、操作模式等方面有很多不适应的地方,因此,我们要理性地看待专业发展学校而不能盲目照搬美国模式。

关键词：专业发展学校 PDS 实习生大学中小学

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