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Difference in microstructural characteristics of stamp-charged coke and gravity-charged coke with approximate macroscopic performance

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Journal of Iron and Steel Research International 2024年第5期31卷 1050-1062页

作者： Chong Zou Zheng-yan Huang Jian-yun Li Bin Li Shi-wei Liu Yuan she School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710311ShaanxiChina Technical Center of Shandong Iron and Steel Co. Ltd.(Laiwu Branch)Jinan271104ShandongChina

The microstructural characteristics including optical texture,porosity and pore structure and chemical structure of stamp-charged coke(SCC)and gravity-charged coke(GCC)with similar conventional macro-indicators were investigated,and the properties including micro-strength,reactivity of coke matrix and that after alkali enrichment were comparatively studied by various characterization *** anisotropic structure of SCC is composed of high content of fine mosaic texture,while the content of medium mosaic texture,coarse texture and fibrous texture is *** statistical average shows that the fine mosaic average of SCC(24.89%)is 3.78 times the GCC average(6.58%),and the coarse mosaic average(1.24%)is only about 1/3 of the GCC average(3.43%).The porosity of SCC is lower than that of GCC,but tamping process does not lead to the fact that the number of closed pores of SCC is significantly lower than that of *** the structure of SCC is compact,its pore number is large and the pore wall is *** of coke with diameter less than 150 nm seem unaffected by tamping *** aromatic structure of SCC was less ordered than that of GCC,which was speculated to be related to the addition of more low metamorphic coal in *** microscopic strength and structural strength of SCC are lower than those of *** reactivity of coke matrix is affected by the specific surface area,but it is not the determining factor of its *** improvement in dissolution reactivity of coke after potassium enrichment is independent of coke type.

关键词： Stamp-charged coke Optical texture Porosity Microstructure Reactivity

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多个光伏空间亮孤子相互作用研究

物理学报 2005年第5期54卷 2090-2095页

作者：江德生佘卫龙中山大学光电材料与技术国家重点实验室广州510275

用数值方法分析了多个平行传播一维光伏空间亮孤子之间的相干相互作用 .结果表明 ,同相多个孤子相互作用时 ,它们不同于两个孤子时的周期性的融合和分开 ,而是会在整体吸引靠近过程中发生孤子的逐步融合作用 .多个孤子相互之间发生能量... 详细信息

用数值方法分析了多个平行传播一维光伏空间亮孤子之间的相干相互作用 .结果表明 ,同相多个孤子相互作用时 ,它们不同于两个孤子时的周期性的融合和分开 ,而是会在整体吸引靠近过程中发生孤子的逐步融合作用 .多个孤子相互之间发生能量耦合作用时 ,可简单归结为三种基本的相互作用模式 .而邻近相互反相的多个孤子相互作用时 ,能保持很好的稳定传播特性 ,其对形成孤子阵列及阵列波导具有指导意义 .

关键词：光伏空间孤子相互作用数值模拟非线性光学能量耦合稳定传播

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光伏孤子对向传播相互作用研究

物理学报 2007年第1期56卷 245-251页

作者：江德生佘卫龙中山大学光电材料与技术国家重点实验室广州510275

用数值方法研究了对向传播条件下不同频率的光伏孤子的相互作用行为.结果表明,两个不同频率的光伏孤子在对向传播相互作用过程中表现出不同的空间演化动力学特性.共轴对向传播时两孤子光场有着不同的会聚或发散行为,并且依赖于晶体长度... 详细信息

用数值方法研究了对向传播条件下不同频率的光伏孤子的相互作用行为.结果表明,两个不同频率的光伏孤子在对向传播相互作用过程中表现出不同的空间演化动力学特性.共轴对向传播时两孤子光场有着不同的会聚或发散行为,并且依赖于晶体长度;非共轴对向靠近传播孤子的会聚或发散作用有所减弱,但频率较大的孤子对频率较小的孤子有显著的吸引作用,使其发生横向偏移,孤子的演化方式也不同于同向传播的情形.

关键词：光伏空间孤子对向传播相互作用

Fabrication of a novel electrochemical sensor based on MnFe_(2)O_(4)/graphene modified glassy carbon electrode for the sensitive detection of bisphenol A

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Journal of Central South University 2024年第6期31卷 1856-1869页

作者： GAO Si-lei TANG Jian-she XIANG Li LONG Jin-wei Department of Environmental and Energy Engineering Anhui Jianzhu UniversityHefei 230601China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Hefei 230601China

Manganese ferrite(MnFe_(2)O_(4))has the advantages of simple preparation,high resistivity,and high crystal ***,we have developed an electrochemical sensor utilizing graphene and MnFe_(2)O_(4) nanocomposites modified glassy carbon electrode(GCE),which is very efficient and sensitive to detect bisphenol A(BPA).MnFe_(2)O_(4)/graphene(GR)was synthesized by immobilizing the MnFe_(2)O_(4) microspheres on the graphene nanosheets via a simple one-pot solvothermal *** morphology and structure of the MnFe_(2)O_(4)/GR nanocomposite have been characterized through scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS).In addition,electrochemical properties of the modified materials are comparably explored by means of cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS)and differential pulse voltammetry(DPV).Under the optimal conditions,the proposed electrochemical sensor for the detection of BPA has a linear range of 0.8-400μmol/L and a detection limit of 0.0235μmol/L(S/N=3)with high sensitivity,good selectivity and high *** addition,the proposed sensor was used to measure the content of BPA in real water samples with a recovery rate of 97.94%-104.56%.At present,the synthesis of MnFe_(2)O_(4)/GR provides more opportunities for the electrochemical detection of BPA in practical applications.

关键词： MnFe_(2)O_(4) graphene electrochemical sensor bisphenol A

基于CINRAD/CC在线自动标定数据的雷达探测精度提升方法的研究

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气象水文海洋仪器 2024年第2期41卷 17-20页

作者：高原孙志于黄晓李建勇尚嘉成刘渊玮佘伟新疆维吾尔自治区气象技术装备保障中心乌鲁木齐830000 广东省气象数据中心广州510000 湖南长沙市气象局长沙410000

文章利用吉林白山和云南西双版纳(双偏振)两部天气雷达的在线自动标定数据,通过统计指标最大值、最小值、均值、标准差、合格率及不合格数据的数量等方法进行数据的分析和研究,以此查找雷达存在的问题。结果表明吉林白山和云南西双版纳... 详细信息

文章利用吉林白山和云南西双版纳(双偏振)两部天气雷达的在线自动标定数据,通过统计指标最大值、最小值、均值、标准差、合格率及不合格数据的数量等方法进行数据的分析和研究,以此查找雷达存在的问题。结果表明吉林白山和云南西双版纳(双偏振)两部天气雷达在运行过程中存在数据缺测、超限等问题。对存在问题进行整改后,标定数据质量有了明显的提升,有效提升了雷达的探测精度。

关键词：在线自动标定相位噪声稳定性

基于气候变量的苎麻产量SSA-BP预测模型

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中国农业科技导报 2024年第1期26卷 110-118页

作者：王辉付虹雨岳云开崔国贤佘玮湖南三一工业职业技术学院长沙410100 湖南农业大学农学院长沙410128

苎麻产量与生长期间的气候因子具有极高相关性,基于气候变量构建的苎麻产量预测模型能够有效精准预测最终产量。BP(back propagation)神经网络具有强大的数据分析能力,在作物产量预测建模中得到广泛应用,然而传统BP神经网络存在精度低... 详细信息

苎麻产量与生长期间的气候因子具有极高相关性,基于气候变量构建的苎麻产量预测模型能够有效精准预测最终产量。BP(back propagation)神经网络具有强大的数据分析能力,在作物产量预测建模中得到广泛应用,然而传统BP神经网络存在精度低、鲁棒性差等问题,可采用麻雀搜索算法(sparrow search algorithm,SSA)对BP神经网络模型进行优化。基于2010—2019年苎麻长期定位试验采集的纤维产量、鲜皮产量和气候数据,分析气候因子在10年内的变化趋势及其对多年生苎麻产量的影响,对比构建的BP神经网络模型及优化后的SSA-BP神经网络模型预测苎麻产量的性能,确定最佳的苎麻产量预测模型。结果表明,苎麻产量与季平均气温、季极端最高气温均值、季极端最低气温均值、季日照时数均值4项气候因子具有极显著相关关系。SSA算法能有效优化BP神经网络,基于SSA-BP的苎麻纤维产量预测模型和鲜皮产量预测模型的R^(2)分别为0.5913和0.6791,高于BP神经网络的苎麻纤维产量预测模型(R^(2)=0.4057)和鲜皮产量预测模型(R^(2)=0.5518)。因此,SSA-BP模型能够更加科学、合理地预测苎麻产量,对于苎麻生产的田间管理及统筹规划具有重要指导意义。

关键词：产量预测气候因子麻雀搜索算法 BP神经网络

MRI shows clodronate-liposomes attenuating liver injury in rats with severe acute pancreatitis

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Hepatobiliary & Pancreatic Diseases International 2010年第2期9卷 192-200页

作者： Zhang, Jian-Xin Dang, sheng-Chun Zhang, Yong Sha, Xin Zhang, Li-Rong wei, Chuan-she Chen, Min Jiang, De-Li Jiangsu Univ Affiliated Hosp Dept Gen Surg Zhenjiang 212001 Peoples R China Jiangsu Univ Affiliated Hosp Dept MRI Zhenjiang 212001 Peoples R China Jiangsu Univ Sch Chem & Chem Engn Zhenjiang 212013 Peoples R China

BACKGROUND: Studies have revealed that macrophages play an important role in the development of severe acute pancreatitis (SAP). Activated macrophages can lead to a systemic inflammatory response, induce lipid peroxidation, impair membrane structure, result in injury to the liver and the other extrahepatic organs, and eventually result in multiple organ dysfunction syndrome by promoting excessive secretion of cytokines. Liver injury can further aggravate the systemic inflammatory response and increase mortality by affecting the metabolism of toxins and the release of excessive inflammatory mediators. Clodronate is a synthetic bisphosphonate, which is often used for treating bone changes caused by osteoporosis and other factors. In the current study, we created liposomes containing superparamagnetic iron oxide particles (SPIOs) for macrophage labeling and magnetic resonance imaging, using a novel method that can bind the clodronate to induce apoptosis and deplete macrophages. METHODS: Superparamagnetic Fe(3)O(4) nanoparticles were prepared by chemical coprecipitation. SPIO-containing liposomes and SPIO-clodronate-containing liposomes were prepared by the thin film method. SAP models were prepared by injection of sodium taurocholate (2 ml/kg body weight) into the subcapsular space of the pancreas. Sprague-Dawley rats were randomly divided into a control group, a SAP plus SPIO-liposome group, and a SAP plus SPIO-clodronate-containing group. Two and six hours after SAP models were available, T2-weighted MRI scans (in the same plane) of the livers of rats in each group were performed. At the end of the scans, 2 ml of blood was taken from the superior mesenteric vein to measure the levels of serum amylase, ALT, AST, TNF-alpha, and IL-6. Pathological changes in the liver and pancreas were assessed. RESULTS: Transmission electron microscopy showed that the liposomes had a uniform size. No pathological changes in the pancreata of rats in the control group were noted. The pat

关键词： pancreatitis, acute clodronate disodium liver injury MR imaging macrophage

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全光双准稳态空间孤子

物理学报 2001年第5期50卷 886-891页

作者：佘卫龙李荣基中山大学超快速激光光谱学国家重点实验室广州510275 香港中文大学物理系和材料科学技术研究中心

观察到一种双准稳态光折变空间孤子 .这种孤子是 (1+1)维的 .它的形成不需要外加电场 ,是全光的 .

关键词：光折变空间孤子双准稳态全光开关外加电场信号光非线性光学诱导光束晶体

Pattern Formation and Quasicrystal Structure in Azobenzene Polymer Film

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Chinese Physics Letters 2000年第6期17卷 428-430页

作者： XU Ze-Da CAI Zhi-Gang ZHANG Ling-Zhi LIU Yan-Fa YANG Jie she wei-Long ZHOU Jian-Ying State Key Laboratory of Ultrafast Laser Spectroscopy Zhongshan UniversityGuangzhou 510275

Pattern formation in azobenzene polymer film by degenerate four-wave mixing is *** arrays with specific patterns are analyzed with scanning electron microscopy and polarizing optical *** is demonstrated that the control of photo-induced nanostructure sized micropattern in the nonlinear organic film is possible by using properly polarized writing beams with the total incident power exceeding a certain threshold.

关键词： film benzene exceeding