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钛含量对443超纯铁素体不锈钢凝固组织的影响

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甘肃冶金 2024年第3期46卷 102-105页

作者：黄泽骅甘肃酒钢集团宏兴钢铁股份有限公司甘肃嘉峪关735100

通过真空感应炉浇注不同钛含量的443超纯铁素体不锈钢铸锭,并分析研究不同钛含量对443超纯铁素体不锈钢铸锭凝固组织的影响。试验结果表明:443超纯铁素体不锈钢凝固过程中先从液相中析出高温铁素体,随着温度降低析出TiN和NbC。钛含量越... 详细信息

通过真空感应炉浇注不同钛含量的443超纯铁素体不锈钢铸锭,并分析研究不同钛含量对443超纯铁素体不锈钢铸锭凝固组织的影响。试验结果表明:443超纯铁素体不锈钢凝固过程中先从液相中析出高温铁素体,随着温度降低析出TiN和NbC。钛含量越高凝固组织的等轴晶率越高、晶粒尺寸越小,在[Ti]为0.3%时,铸锭组织全部为等轴晶,等轴晶率为100%,平均尺寸达到0.56 mm,晶粒球化率为0.85。

关键词： 443超纯铁素体不锈钢 Ti 凝固组织等轴晶率真空感应炉

美拉德反应对食品品质与安全的影响及其产物检测研究进展

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轻工学报 2024年第2期39卷 60-68页

作者：苑彬金慧骈琳高思今黄泽华河南职业技术学院智能制造学院河南郑州450046 河南工业大学粮油食品学院河南郑州450001 河南工业大学国际教育学院河南郑州450001

对美拉德反应及其产物在食品加工过程中的多重影响进行梳理,探讨其对食品品质与安全的影响,并对典型的创新性反应产物检测技术进行综述,指出:该反应既能生成导致食品体系发生褐变的棕色聚合物(如5-羟甲基糠醛)或含氮共聚物(类黑素),还... 详细信息

对美拉德反应及其产物在食品加工过程中的多重影响进行梳理,探讨其对食品品质与安全的影响,并对典型的创新性反应产物检测技术进行综述,指出:该反应既能生成导致食品体系发生褐变的棕色聚合物(如5-羟甲基糠醛)或含氮共聚物(类黑素),还能产生显著影响食品风味的物质(如酮类、醛类、烷基化合物等);该反应不但可以改变食品的结构特性(如降低蛋白质的荧光强度和表面疏水性),而且能生成具有特定功能的载体(如乳液凝胶功能载体)。该反应在生成抗氧化产物和消除食物中的过敏原方面具有积极作用,然而,也可能生成高级糖基化终产物、丙烯酰胺、杂环胺、5-羟甲基糠醛等潜在有害物质。目前,美拉德反应产物的主要检测技术包括光谱法、色谱法、荧光化合物表征法等,而荧光化合物作为美拉德反应中的重要中间产物,可被应用于构建荧光探针,实现对美拉德反应的实时监测。未来应深入研究有害物质的形成机制及其影响因素,或进一步优化这些检测方法的精确度和效率,为食品加工技术的持续发展提供更加全面的理论支持。

关键词：美拉德反应食品品质食品安全检测方法

以牛肉为基准高水分组织化植物蛋白的工艺优化

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河南工业大学学报（自然科学版） 2024年第3期45卷 26-33页

作者：安红周孙嘉瑜王莉芬任静文金慧黄泽华河南工业大学粮油食品学院河南郑州450001 小麦和玉米深加工国家工程研究中心河南郑州450001 匈牙利农业与生命科学大学食品科学与技术研究所匈牙利布达佩斯1118

为探究高水分组织化植物蛋白(HMTVP)模拟块状熟牛肉的最佳工艺,以大豆分离蛋白、小麦淀粉、谷朊粉、豆粕为原料进行高水分挤压,并基于熟牛肉的应变率和质构特性对HMTVP原料配方和双螺杆挤压工艺参数进行单因素分析及响应面优化。结果表... 详细信息

为探究高水分组织化植物蛋白(HMTVP)模拟块状熟牛肉的最佳工艺,以大豆分离蛋白、小麦淀粉、谷朊粉、豆粕为原料进行高水分挤压,并基于熟牛肉的应变率和质构特性对HMTVP原料配方和双螺杆挤压工艺参数进行单因素分析及响应面优化。结果表明:大豆分离蛋白能提升HMTVP的硬度和咀嚼度,淀粉和进水量会降低HMTVP的硬度,喂料量在一定范围能提升HMTVP硬度;在大豆分离蛋白含量32.79%、小麦淀粉含量15.83%、谷朊粉含量24.43%、豆粕含量42.78%,进水量3.4 L/h,喂料量2.8 kg/h条件下,HMTVP的硬度为12.75 kg、咀嚼度为8.27 kg、应变率为0.92×10^(-4),实际水分含量为58.62%,与五级熟度牛肉的质构特性相近;并且在此挤压配方及工艺下制备的HMTVP感官评分较高。HMTVP具有模拟动物肉的巨大潜力,为其在食品工业中的广泛应用提供了有力的参考依据。

关键词：高水分组织化植物蛋白工艺优化仿牛肉质构特性挤压

Preparation and Characterization of LiTaO_3 Films Derived by an Improved Sol-Gel Process

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Acta Metallurgica Sinica(English Letters) 2013年第3期26卷 299-302页

作者： Jun GOU Jun WANG Ming YANG zehua huang Weizhi LI Yadong JIANG State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Information University of Electronic Science and Technology of China

In this paper, an improved sol-gel method was suggested to obtain high-concentration LiTaO3 precursor solution for simplified experimental conditions and thicker films, by mixing lithium acetate and tantalum ethoxide in a 1, 2-Propylene glycol solution. Compared to traditional methods, the process was done without weak acidic solution and absolute dry experimental condition. Results of a comparative study of LiTaO3 thin films derived by the improved sol-gel process and a traditional process using 2-methoxy ethanol as solvent were presented. Nano-crystalline LiTaO3 films with rhombohedral structures were formed in both methods after annealing at 650℃ for 5 min. The thickness of each LiTaO3 layer coated onto the substrate increased from 25 nm to 110 nm when 2-methoxy ethanol was replaced by 1, 2-Propylene glycol. LiTaO3 films with a stronger preferential orientation were obtained in 1, 2-Propylene glycol due to its higher boiling point and slower volatilization rate. On the other hand, the diffraction peak intensity of LiTaO3 thin films prepared using 1, 2-Propylene glycol was weaker than that of the films prepared using 2-methoxy ethanol due to decreased times of annealing.

关键词： LiTaO3 Thin film Sol-gel Crystallization

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复合菌发酵对非油炸方便面品质的影响

食品科学 2024年第5期45卷 210-216页

作者：张伟峰黄泽华王玉坤张剑赵萌萌崔晚晚安艳霞殷贵鸿周朋辉赵阳河南农业大学食品科学技术学院河南郑州450002 河南工业大学粮油食品工程学院河南郑州450001 农业农村部大宗粮食加工重点实验室河南郑州450002 白象食品股份有限公司河南郑州451100 河南农业大学农学院省部共建小麦玉米作物学国家重点实验室河南粮食作物协同创新中心河南郑州450046

通过酵母菌、保加利亚乳杆菌、嗜热链球菌发酵制备非油炸方便面,通过复水测试、质构分析、电子鼻分析、扫描电子显微镜观察等探讨复合菌发酵工艺对非油炸方便面品质的影响。结果表明,酵母菌主要对样品的复水性和质构产生影响,保加利亚... 详细信息

通过酵母菌、保加利亚乳杆菌、嗜热链球菌发酵制备非油炸方便面,通过复水测试、质构分析、电子鼻分析、扫描电子显微镜观察等探讨复合菌发酵工艺对非油炸方便面品质的影响。结果表明,酵母菌主要对样品的复水性和质构产生影响,保加利亚乳杆菌、嗜热链球菌主要对风味起到改善作用。一次发酵工艺有利于维持非油炸方便面的耐泡性,二次发酵工艺有利于改善复水性和风味。经过二次发酵,非油炸方便面的最佳复水时间可缩短到4.0 min,复水后样品的R(2)、R(7)的响应值高达2.8和2.9。由扫描电子显微镜观测结果可知,复合菌发酵能够赋予非油炸方便面疏松多孔的内部结构,其中二次发酵样品的孔隙分布更为均匀。综合评价非油炸方便面的品质,一次发酵、二次发酵工艺中复合菌的适宜添加量均为1.5%酵母菌+0.075%保加利亚乳杆菌+0.075%嗜热链球菌。

关键词：复合菌发酵非油炸方便面复水性风味

Assessing Landsat-8 and Sentinel-2 spectral-temporal features for mapping tree species of northern plantation forests in Heilongjiang Province,China

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Forest Ecosystems 2022年第3期9卷 344-356页

作者： Mengyu Wang Yi Zheng Chengquan huang Ran Meng Yong Pang Wen Jia Jie Zhou zehua huang Linchuan Fang Feng Zhao Key Laboratory of Geographical Process Analysis&Simulation of Hubei Province/College of Urban and Environmental Sciences Central China Normal UniversityWuhan430079China Department of Geographical Sciences University of MarylandCollege ParkMD20742USA Macro Agriculture Research Institute Interdisciplinary Sciences Research InstituteCollege of Resources and EnvironmentHuazhong Agricultural UniversityWuhan430070China Institute of Forest Resource Information Techniques Chinese Academy of ForestryBeijing100091China Key Laboratory of Forestry Remote Sensing and Information System National Forestry and Grassland AdministrationBeijing100091China

Background:Accurate mapping of tree species is highly desired in the management and research of plantation forests,whose ecosystem services are currently under ***-series multispectral satellite images,e.g.,from Landsat-8(L8)and Sentinel-2(S2),have been proven useful in mapping general forest types,yet we do not know quantitatively how their spectral features(e.g.,red-edge)and temporal frequency of data acquisitions(e.g.,16-day vs.5-day)contribute to plantation forest mapping to the species ***,it is unclear to what extent the fusion of L8 and S2 will result in improvements in tree species mapping of northern plantation forests in ***:We designed three sets of classification experiments(i.e.,single-date,multi-date,and spectral-temporal)to evaluate the performances of L8 and S2 data for mapping keystone timber tree species in northern *** first used seven pairs of L8 and S2 images to evaluate the performances of L8 and S2 key spectral features for separating these tree species across key growing *** we extracted the spectral-temporal features from all available images of different temporal frequency of data acquisition(i.e.,L8 time series,S2 time series,and fusion of L8 and S2)to assess the contribution of image temporal frequency on the accuracy of tree species mapping in the study ***:1)S2 outperformed L8 images in all classification experiments,with or without the red edge bands(0.4%–3.4%and 0.2%–4.4%higher for overall accuracy and macro-F1,respectively);2)NDTI(the ratio of SWIR1 minus SWIR2 to SWIR1 plus SWIR2)and Tasseled Cap coefficients were most important features in all the classifications,and for time-series experiments,the spectral-temporal features of red band-related vegetation indices were most useful;3)increasing the temporal frequency of data acquisition can improve overall accuracy of tree species mapping for up to 3.2%(from 90.1%using single-date imagery to 93.3%using S2 time-series),yet similar ov

关键词： Tree species mapping Plantation forests Red-edge features Temporal frequency of data acquisition Fusion of Landsat-8 and Sentinel-2

Different administration routes of tranexamic acid in the treatment of melasma

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Chinese Journal of Plastic and Reconstructive Surgery 2024年第3期6卷 154-158页

作者： zehua Chen Lvping huang Laser Aesthetic Center Plastic Surgery HospitalPeking Union Medical College and Chinese Academy of Medical SciencesBeijing 100144China

Melasma is a prevalent and challenging skin condition that affects the face and causes distress in many patients and *** acid(TA)has been found to be effective for treating melasma and can be administered through multiple *** review details the mechanisms of action of TA in treatment of melasma and assesses the efficacy and safety associated with different administrations,which can contribute to selecting appropriate melasma treatment plan for different patients.

关键词： Tranexamic acid Melasma Dermatology

Improved Yield Prediction of Ratoon Rice Using Unmanned Aerial Vehicle-Based Multi-Temporal Feature Method

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Rice science 2023年第3期30卷 247-256,I0039-I0042页

作者： ZHOU Longfei MENG Ran YU Xing LIAO Yigui huang zehua LÜZhengang XU Binyuan YANG Guodong PENG Shaobing XU Le College of Resources and Environment Huazhong Agricultural UniversityWuhan 430070China National Key Laboratory of Crop Genetic Improvement/Hubei Hongshan Laboratory/Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River Ministry of Agriculture and Rural Affairs/College of Plant Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China College of Agriculture Northeast Agricultural UniversityHarbin 150006China Harbin Institute of Technology Institute for Artificial Intelligence Co. LtdHarbin 150000China

Pre-harvest yield prediction of ratoon rice is critical for guiding crop interventions in precision ***,the unique agronomic practice(i.e.,varied stubble height treatment)in rice ratooning could lead to inconsistent rice phenology,which had a significant impact on yield prediction of ratoon ***-temporal unmanned aerial vehicle(UAV)-based remote sensing can likely monitor ratoon rice productivity and reflect maximum yield potential across growing seasons for improving the yield prediction compared with previous ***,in this study,we explored the performance of combination of agronomic practice information(API)and single-phase,multi-spectral features[vegetation indices(VIs)and texture(Tex)features]in predicting ratoon rice yield,and developed a new UAV-based method to retrieve yield formation process by using multi-temporal features which were effective in improving yield forecasting accuracy of ratoon *** results showed that the integrated use of VIs,Tex and API(VIs&Tex+API)improved the accuracy of yield prediction than single-phase UAV imagery-based feature,with the panicle initiation stage being the best period for yield prediction(R^(2) as 0.732,RMSE as 0.406,RRMSE as 0.101).More importantly,compared with previous multi-temporal UAV-based methods,our proposed multi-temporal method(multi-temporal model VIs&Tex:R^(2) as 0.795,RMSE as 0.298,RRMSE as 0.072)can increase R^(2) by 0.020-0.111 and decrease RMSE by 0.020-0.080 in crop yield *** study provides an effective method for accurate pre-harvest yield prediction of ratoon rice in precision agriculture,which is of great significance to take timely means for ensuring ratoon rice production and food security.

关键词： ratoon rice yield prediction unmanned aerial vehicle multi-temporal feature agronomic practice stubble height

纤维增强复合材料(FRP)配筋混凝土结构研究综述

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市政技术 2024年第6期42卷 160-173页

作者：黄泽华朱尚清荚瑞馨孙嘉辉龙金喜蔡刚北京工业大学城市建设学部北京100124 北京市政路桥管理养护集团有限公司北京101300 重庆桥安物联科技有限公司重庆401120

新型建材纤维增强复合材料(FRP)具有高抗拉强度、低密度和耐腐蚀性能优良等特性,是一种具有巨大潜力的工程材料。如今,传统的钢筋混凝土结构面临钢筋易锈蚀的问题,给社会造成了较大的经济损失,维护和修复成本高昂。通过在特定环境中将... 详细信息

新型建材纤维增强复合材料(FRP)具有高抗拉强度、低密度和耐腐蚀性能优良等特性,是一种具有巨大潜力的工程材料。如今,传统的钢筋混凝土结构面临钢筋易锈蚀的问题,给社会造成了较大的经济损失,维护和修复成本高昂。通过在特定环境中将钢筋替换为FRP筋,不仅能够有效解决钢筋混凝土结构的耐久性问题,而且能够进一步优化其工作性能,延长使用寿命,降低维护成本。首先简述了FRP筋混凝土结构的国内外研究进展,随后对FRP筋、FRP筋混凝土及预应力FRP筋混凝土结构的特性进行了阐述,最后对FRP筋混凝土结构的重要发展问题进行了总结,并对其未来的发展前景进行了展望。

关键词：纤维增强复合材料 FRP筋材预应力混凝土结构

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