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Adaptive Coordinated Control for Hot Strip Finishing Mills

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Journal of Iron and Steel Research International 2011年第4期18卷 36-43页

作者： JIAO Xiao-hong shao Li-ping PENG Yan Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 Hebei China Institute of Mechanical Engineering Yanshan University Qinhuangclao 066004 Hebei China

To further improve the control accuracy for strip dimension of hot strip mills,an adaptive control scheme is investigated for a hot strip finishing mill based on the decentralization and coordination among the controllers of gauge,tension and ***,the adaptive controller designed can regulate simultaneously the strip exit thickness,the strip tension and the looper angle to ensure better performance of the strip quality of finishing ***,the control scheme is proposed in consideration of the essential nonlinearity and the unavoidable friction phenomena in the mechanical system,so the controller can be efficient in a wider range of working *** simulation results of a model obtained from a real hot strip finishing mill show the effectiveness of the proposed control scheme in comparison with the conventional control method.

关键词： hot strip finishing mills exist gauge tension looper angle adaptive control

HSAEP:a new platform to evaluate hybrid simulation algorithms

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Frontiers of Computer Science 2021年第5期15卷 211-213页

作者： Wei GUO Xiaoxu DUAN Chen ZENG ping shao School of Civil Engineering Central South UniversityChangsha 410075China

1 Introduction Hybrid simulation method in civil engineering is a test method that combines numerical simulation and physical testing[1].The basic procedure of hybrid simulation is shown in *** hybrid simulation,the performance of the algorithm has a great influence on the test results[2].However,there is no standard test platform or standard model to test the performance of the hybrid simulation *** situations limit the development of hybrid simulation algorithms and may lead to unreliable hybrid simulation results.

关键词： algorithm. simulation combine

基于正交Legendre多项式的神经网络求解随机Itô-Volterra积分方程

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杭州电子科技大学学报（自然科学版） 2024年第4期44卷 80-87页

作者：曾嵘张洪铭邵新平杭州电子科技大学理学院浙江杭州310018

为求多维随机Itô-Volterra积分方程近似解,首先利用Legendre多项式的函数逼近和带配点法的算子矩阵,将所求方程转化为代数方程组。基于算子矩阵构造损失函数,并用配置点作为网络输入、Legendre多项式的系数作为权重构造神经网络,再采用... 详细信息

为求多维随机Itô-Volterra积分方程近似解,首先利用Legendre多项式的函数逼近和带配点法的算子矩阵,将所求方程转化为代数方程组。基于算子矩阵构造损失函数,并用配置点作为网络输入、Legendre多项式的系数作为权重构造神经网络,再采用梯度下降法对权重进行学习从而得到近似解。从理论上对该方法的收敛性进行了分析。最后,通过数值算例验证该方法的准确性。

关键词： Legendre多项式算子矩阵神经网络随机积分方程

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基于航空发动机产品需求的压气机技术研究

航空发动机 2024年第2期50卷 1-10页

作者：程荣辉张军王东张学宝张少平曾瑶中国航发沈阳发动机研究所沈阳110015 中国航发四川燃气涡轮研究院成都610500

压气机是航空发动机的关键核心部件,随着先进作战飞机对航空发动机需求的不断提高,快速研制全面满足发动机产品需求的压气机是工程设计人员面临的重大挑战。为保证设计的压气机全面满足发动机产品需求,介绍了先进作战飞机发动机的典型... 详细信息

压气机是航空发动机的关键核心部件,随着先进作战飞机对航空发动机需求的不断提高,快速研制全面满足发动机产品需求的压气机是工程设计人员面临的重大挑战。为保证设计的压气机全面满足发动机产品需求,介绍了先进作战飞机发动机的典型技术特点以及对压气机全面的技术需求,梳理了压气机满足发动机需求需重点考虑的影响因素,开展了宽转速范围高效率设计技术、全飞行包线高稳定裕度设计技术、高性能保持能力设计技术、高可靠叶片设计技术、高稳健压气机转子设计技术、高可靠调节机构设计技术、高安全性以及高环境适应性设计技术研究。结果表明:基于需求的综合设计可以保证压气机的综合性能。该研究可为设计全面满足发动机产品需求的压气机提供参考和依据。

关键词：压气机需求性能可靠性航空发动机

血清HSP70、sICAM-1、CEA水平联合检测对卵巢囊肿患者术后复发的预测价值

同方期刊数据库博看期刊评论

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中国血液流变学杂志 2024年第1期34卷 102-105页

作者：杨艳杨少平王玉珍河南省淇县妇幼保健计划生育服务中心河南淇县456750

目的探讨血清热休克蛋白70(HSP70)、可溶性细胞间黏附分子-1(sICAM-1)、癌胚抗原(CEA)水平联合检测对卵巢囊肿患者术后复发的预测价值。方法选取2020年1月—2022年1月行卵巢囊肿手术的60例患者为研究对象,根据术后是否复发分为复发组(n=... 详细信息

目的探讨血清热休克蛋白70(HSP70)、可溶性细胞间黏附分子-1(sICAM-1)、癌胚抗原(CEA)水平联合检测对卵巢囊肿患者术后复发的预测价值。方法选取2020年1月—2022年1月行卵巢囊肿手术的60例患者为研究对象,根据术后是否复发分为复发组(n=20)和非复发组(n=40),比较两组患者的一般资料、术前血清HSP70、sICAM-1、CEA水平,分析其与卵巢囊肿术后复发的相关性以及AUC指标。结果复发组患者的年龄、囊肿直径、囊肿类型、恶性程度、术前血清HSP70水平均高于非复发组,差异有统计学意义(P0.05)。联合检测对卵巢囊肿复发的预测能力优于单个指标。结论血清HSP70、sICAM-1、CEA水平联合检测对卵巢囊肿患者术后复发具有一定的预测价值,其中HSP70可能是较为重要的预测指标。

关键词：卵巢囊肿术后复发 HSP70 sICAM-1 CEA

应用鱼类生物完整性指数评价黑水河河流健康状况

维普期刊数据库评论

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水生态学杂志 2024年第2期45卷 73-83页

作者：李文滕航田辉伍邓华堂成必新杨少荣刘绍平陈大庆段辛斌中国水产科学研究院长江水产研究所农业农村部长江中上游渔业资源环境科学观测实验站湖北武汉430223 华中农业大学水产学院湖北武汉430070 西南大学生命科学学院重庆400715 上海勘测设计研究院有限公司上海200434 中国三峡建工(集团)有限公司四川成都610041

黑水河为金沙江下游一级支流,是白鹤滩库区干流鱼类的重要替代生境和优先保护支流,评价黑水河河流健康状况,可为黑水河鱼类栖息地生态修复提供数据支撑。2018年11月至2019年9月在黑水河23个采样点开展了4次鱼类资源调查,共采集到鱼类45(... 详细信息

黑水河为金沙江下游一级支流,是白鹤滩库区干流鱼类的重要替代生境和优先保护支流,评价黑水河河流健康状况,可为黑水河鱼类栖息地生态修复提供数据支撑。2018年11月至2019年9月在黑水河23个采样点开展了4次鱼类资源调查,共采集到鱼类45(亚)种,隶属于4目10科33属。以黑水河河口、水文站上游和825回水点作为参照点,经过分布范围、判别能力及Pearson相关性分析等指标构建黑水河鱼类生物完整性指数(F-IBI)评价体系。使用1、3、5赋值法和比值法计算各采样点的IBI分值以评价各采样点健康状况,结果显示,1、3、5赋值法和比值法的结果虽不完全相同,但趋势是一致的。黑水河大部分采样点的健康状况处于“较差”和“一般”水平。相关性分析结果显示,F-IBI分值与海拔呈显著负相关(P<0.01)。丰度生物量比较曲线显示,黑水河鱼类群落结构整体上受到中度干扰。

关键词：鱼类生物完整性指数河流健康黑水河

Modified two-grid method for solving coupled Navier-Stokes/Darcy model based on Newton iteration

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Applied Mathematics(A Journal of Chinese Universities) 2015年第2期30卷 127-140页

作者： SHEN Yu-jing HAN Dan-fu shao Xin-ping Department of Mathematics Zhejiang University Department of Mathematics Hangzhou Normal University School of Science Hangzhou Dianzi University

A new decoupled two-gird algorithm with the Newton iteration is proposed for solving the coupled Navier-Stokes/Darcy model which describes a fluid flow filtrating through porous media. Moreover the error estimate is given, which shows that the same order of accuracy can be achieved as solving the system directly in the fine mesh when h = H2. Both theoretical analysis and numerical experiments illustrate the efficiency of the algorithm for solving the coupled problem.

关键词： Navier-Stokes equation Darcy's law interface coupling two-grid algorithm Newton iteration

A Novel Route to Synthesize Nano-crystalline Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O(3-δ) Perovskite Oxide at High Temperature

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Chinese Chemical Letters 2006年第10期17卷 1353-1356页

作者： Wei ZHOU Zong ping shao Wan Qin JIN Key Laboratory of Materials-Oriented Chemical Engineering of Ministry of Education of China College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009

It is normally difficult to prepare nano-sized Ba0.5Sr0.5Co0.8Fe0.2O3-δ（BSCF） oxide at high temperature due to its high surface activity. The complexing process, which has successfully applied in the synthesis of nano Sm0.15Ce0.85I1.925 with crystallite size down to 5 nml, just resulted in a coarse BSCF with crystaUite size of 41.9 nm at 900℃. We applied a novel process by simply modifying the solid precursor from the complexing process with concentrated nitric acid treatment. The obtained BSCF powder had a crystaUite size of -25 nm even calcined at 1000℃. The small crystaUite size is extremely promising to enhance the electrochemical performance of cathode for solid oxide fuel cell dramatically.

关键词： Nano-crystallite perovskite solid oxide fuel cells.

Assessments on surface water resources and their vulnerability and adaptability in China

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Advances in Climate Change Research 2020年第4期11卷 381-391页

作者： QIN Jia DING Yong-Jian ZHAO Qiu-Dong WANG shao-ping CHANG Ya-ping State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China Key Laboratory of Eco-Hydrology Inland River Basin Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Beijing100049China

A clear understanding of the changes of water resources under the background of environmental changes is of great significance for scientific management and utilization of water resources in *** study systematically analyzed the spatialetemporal variations of surface water resources in China since *** vulnerability in current(2010s)and its trends from 2000 to late-2010s in different regions of China were also *** addition,the correspondingly adaptive measures to counter regional risks to water resources were *** concluded that the runoff of major rivers had been decreasing in eastern China and increasing in western China during *** the arid area of Northwest China,the alpine runoff has shown an overall upward trend since the late-1990s/early-2000s,with a 10%-25% increase caused by the increase of glacial meltwater and *** the runoff of each hydrological station in the 2000s-2010s was 34.7% lower than that in the 1950se2010s on *** increases in precipitation and glacial meltwater with global warming caused a rapid expansion of lakes in the Qinghai-Tibet Plateau and Xinjiang,thus leading to an increase in total area and water quantity of lakes in China from 1995 to *** mean contribution rates of climate change and human activity to runoff change in river basins of China were 53.5% and 46.5%,respectively,during the period of *** driving factor of runoff change in many river basins has gradually changed from climate change(1950s-2000)to human activity(2000-2018).During 2000-2018,the contributions of human activities to runoff change were 50%-80% in major rivers of eastern *** vulnerability in most areas of Northwest China and North China is generally high,with the vulnerability index greater than ***,in Northeast,East,South,and Central China,it is lower or not *** Southwest China,the vulnerability varies greatly with Yunnan and Sichuan relatively low while Chon

关键词： Runoff change Lake area Surface water vulnerability Adaptation measures China