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Multivariable Dynamic Modeling for Molten Iron Quality Using Incremental Random Vector Functional-link Networks

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Journal of Iron and Steel Research International 2016年第11期23卷 1151-1159页

作者： Li ZHANG Ping ZHOU he-da SONG Meng yuan Tian-you CHAI State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Department of Mechanical Engineering University of Melbourne

Molten iron temperature as well as Si, P, and S contents is the most essential molten iron quality （MIQ） indices in the blast furnace （BF） ironmaking, which requires strict monitoring during the whole ironmaking production. However, these MIQ parameters are difficult to be directly measured online, and large-time delay exists in off-line analysis through laboratory sampling. Focusing on the practical challenge, a data-driven modeling method was presented for the prediction of MIQ using the improved muhivariable incremental random vector functional-link net- works （M-I-RVFLNs）. Compared with the conventional random vector functional-link networks （RVFLNs） and the online sequential RVFLNs, the M-I-RVFLNs have solved the problem of deciding the optimal number of hidden nodes and overcome the overfitting problems. Moreover, the proposed M I RVFLNs model has exhibited the potential for multivariable prediction of the MIQ and improved the terminal condition for the multiple-input multiple-out- put （MIMO） dynamic system, which is suitable for the BF ironmaking process in practice. Ultimately, industrial experiments and contrastive researches have been conducted on the BF No. 2 in Liuzhou Iron and Steel Group Co. Ltd. of China using the proposed method, and the results demonstrate that the established model produces better estima ting accuracy than other MIQ modeling methods.

关键词： molten iron quality multivariable incremental random vector functional-link network blast furnace iron-making data-driven modeling principal component analysis

Investigation on sampling artifacts of particle associated PAHs using ozone denuder systems

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Frontiers of Environmental Science & Engineering 2014年第2期8卷 284-292页

作者： Kai LIU Fengkui DUAN Kebin he Yongliang MA yuan CheNG State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China

Polycyclic aromatic hydrocarbons （PAHs） are complex organic compounds which are identified as significant carcinogenic to human health. PAHs （mainly in particle phase） are susceptible to atmospheric oxidant gases, especially ozone, nitrogen oxides （NOx）, hydroxyl radical （OH）, and could be degraded on filters during sampling process, leading to an underestimation of ambient PAH concentrations. The goal of this work was to investigate particle associated PAHs sampling artifacts caused by ozone in summer of Beijing. Comparative sampling systems were operated simultaneously during the whole campaign, one with activated carbon ozone denuder, the other being set as conventional sampling system. Activated carbon denuder was testified to be highly efficient to eliminate ozone from air stream. In general, nine particle-bound PAHs observed from conventional sampler were all lower than those from ozone denuder system. The total PAHs （particle phase） concentration was averagely underestimated by 35.9% in conventional sampling procedure. Benzo[a]pyrene （BaP） had the highest percentage of mass loss. founded to have influences Ambient temperature was on PAHs sampling artifacts. High temperature can increase loss of particle associated PAHs during sampling.

关键词： particle associated polycyclic aromatic hydro- carbons (PAHs) ozone denuder sampling artifacts

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PN结对交流信号相位的影响

物理实验 2003年第8期23卷 6-8,12页

作者：茅卫红侯清润陈宜保张慧云陈宏何元金清华大学物理系北京100084

交流小信号被 PN结和电容分压 ,且电容值远远大于 PN结电容值时 ,大电容两端的电压是很小的交变电压 ,该信号的相位与 PN结的内阻 (正向 )有关 .把 PN结当做一个电容和一个电阻并联。

关键词： PN结交流信号相位电容分压电容值交变电压半导体

A Novel Method for Power Analysis Based on Combinational Logic in Block Cipher Circuit

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Chinese Journal of Electronics 2014年第1期23卷 151-156页

作者： GUO Zheng GU Dawu yuan Kan LIU Junrong he Yuming School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai Huahong Integrated Circuit Co. Ltd.

In this paper, we propose a method that builds power model template according to input transitions of combinatorial logic circuit. By computing its correlation with the overall power consumption of a cryptographic circuit, we are able to recover the secret key. Several simulation-based experiments have been conducted,which verifies the feasibility of our method and shows that the combinatorial logic is also faced with the problem of information leakage in power analysis cases. Compared with DPA(Differential power analysis) and CPA(Correlation power analysis), our attack is fairly effective against the cryptographic circuits whose protection is only implemented on the register parts of the sequential circuit. In addition, a few topics for further research, as well as the advices for more precise power model and countermeasures,are presented at the end of the paper.

关键词： Side channel attack Power analysis Combinational logic Cryptographic circuits

不同肺活检方法对肺部弥漫性间质性疾病的诊断价值

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中国内镜杂志 2008年第5期14卷 471-474页

作者：齐曼古丽.吾守尔卢冬梅夏宇何元兵米日古丽.司马义新疆医科大学第一附属医院呼吸科新疆乌鲁木齐830054

目的探讨不同肺活检方法在肺部弥漫性间质性疾病诊断中的价值。方法回顾性分析因弥漫性肺间质性疾病接受经支气管镜肺活检(transbronchial lung biopsy,TBLB)、CT引导下经皮肺活检(CT-guided percutaneous needle aspiration biopsy,PC... 详细信息

目的探讨不同肺活检方法在肺部弥漫性间质性疾病诊断中的价值。方法回顾性分析因弥漫性肺间质性疾病接受经支气管镜肺活检(transbronchial lung biopsy,TBLB)、CT引导下经皮肺活检(CT-guided percutaneous needle aspiration biopsy,PCNA)、外科电视胸腔镜(lung biopsy by video-assisted thoracoscopic surgery,VATS)及小开胸肺活检(open lung biopsy,OLB)患者的临床和病理诊断资料。结果73例患者接受TBLB,36例病理诊断为肺间质纤维化,7例诊断UIP,8例诊断结核,2例诊断为肺泡蛋白沉着症。28例患者接受经皮肺活检,其中18例得到病理分型。外科电视胸腔镜肺活检28例,小开胸肺活检20例,除1例未明确外,其余全部病理分类。结论在诊断弥漫性肺间质性疾病时,可首先考虑创伤性小的经纤维支气管镜肺活检,可除外感染、肿瘤及结节病。肺部弥漫性间质性疾病中特发性间质性肺炎的病理诊断特别是病理分型需要较大的活检组织,应考虑进行外科电视胸腔镜或小开胸肺活检。

关键词：弥漫性肺间质性疾病诊断肺活检纤维支气管镜检查

Cerium-based nanomaterials for photo/electrocatalysis

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Science China Chemistry 2023年第8期66卷 2204-2220页

作者： Ge Li Ping Wang Miao he Xilin yuan Lulin Tang Zhenxing Li State Key Laboratory of heavy Oil Processing College of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing102249China

The localization and incomplete filling of 4f electrons endow cerium(Ce)with the great potential in electrocatalysis and *** unique 5d empty orbital of Ce elements can be used as a hydrogen“trap”site,which is conducive to the recombination of hydrogen ions or atoms and effectively promotes the desorption of hydrogen molecules in ***,due to the stable crystal structure,excellent oxygen mobility,and good optical properties,Ce-based nanomaterials are considered as one of the most desirable photocatalytic catalysts and widely used in atmospheric ***,cerium-based nanomaterials have considerable application prospects in photocatalysis and *** this review,we summarize the preparation methods of Ce-based nanomaterials,and discuss the application of Ce-based nanomaterials in electrocatalysis and *** them,electrocatalysis applications include the following:oxygen reduction reaction(ORR),hydrogen evolution reaction(heR),oxygen evolution reaction(OER),CO_(2) reduction reaction(CO_(2)RR),and other electrocatalysis,and photocatalysis applications include heR,CO_(2)RR,photodegradation,and other *** the summary of present progress in the application of Ce-based nanomaterials in electrocatalytic and photocatalytic reaction,this review provides a reasonable prospect on the Ce-based nanomaterials in electrocatalysis and photocatalysis.

关键词： Ce-based nanomaterials electrocatalysis photocatalysis oxygen reduction reaction hydrogen evolution reaction oxygen evolution reaction carbon dioxide reduction reaction

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红壤丘岗区人工林土壤水分、养分流失动态研究

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水土保持学报 2002年第4期16卷 91-93,97页

作者：何园球王兴祥胡锋陈家宙中国科学院南京土壤研究所南京210008 南京农业大学南京210008 华中农业大学武汉430070

针对红壤丘岗区自然条件和地形特点,在岗地上坡布置了4组人工林恢复实验,研究在植被恢复过程中林地土壤水分养分流失动态。12年研究结果表明:不同林地水分和养分径流损失随植被生长而减少,渗漏损失则随植被生长而增加;水分、养分径流损... 详细信息

针对红壤丘岗区自然条件和地形特点,在岗地上坡布置了4组人工林恢复实验,研究在植被恢复过程中林地土壤水分养分流失动态。12年研究结果表明:不同林地水分和养分径流损失随植被生长而减少,渗漏损失则随植被生长而增加;水分、养分径流损失量依次为自然草被>马尾松林>针阔混交林>阔叶林,渗漏损失量则相反。

关键词：红壤丘岗区人工林土壤水分动态研究土壤养分水工流失

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超磁致伸缩材料性能测量实验

物理实验 2008年第12期28卷 13-15,20页

作者：陈宜保王文翰杨翔何元金王合英孙文博清华大学物理系北京100084

采用比较法和电桥法测量了Terfenol-D样品的磁致伸缩系数,并采用共振法测量了Terfenol-D样品的磁机械耦合系数.将超磁致伸缩材料特性测量实验引入本科实验教学,可以使学生在近代物理实验课程的学习中接触到材料科学研究前沿领域的技术... 详细信息

采用比较法和电桥法测量了Terfenol-D样品的磁致伸缩系数,并采用共振法测量了Terfenol-D样品的磁机械耦合系数.将超磁致伸缩材料特性测量实验引入本科实验教学,可以使学生在近代物理实验课程的学习中接触到材料科学研究前沿领域的技术与知识,有助于提高学生的创新意识和创新能力,激发学生的学习兴趣.

关键词：超磁致伸缩材料磁致伸缩系数磁机械耦合系数

基于问题学习法在森林病理学课程教学中的应用初探

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教育教学论坛 2020年第42期 279-281页

作者：何苑皞李河周国英董文统张盛培曹凌雪杨琴中南林业科技大学林学院湖南长沙410004

为培养学生对森林病理学课程学习的兴趣,强化教学效果,在森林病理学课程教学中,探索了一些适合于基于问题学习法的教学案例,该教学方法的运用提高了学生的学习积极性,改善了教学质量,为基于问题学习法模式在本门课程中的继续应用提供了... 详细信息

为培养学生对森林病理学课程学习的兴趣,强化教学效果,在森林病理学课程教学中,探索了一些适合于基于问题学习法的教学案例,该教学方法的运用提高了学生的学习积极性,改善了教学质量,为基于问题学习法模式在本门课程中的继续应用提供了宝贵的经验。

关键词：基于问题学习法森林病理教学方法