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Outlier screening for ironmaking data on blast furnaces

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International Journal of Minerals,Metallurgy and Materials 2021年第6期28卷 1001-1010页

作者： Jun Zhao Shao-fei Chen Xiao-jie liu Xin li hong-yang li Qing Lyu College of Metallurgy Northeastern UniversityShenyang 110819China Tangshan Branch of HBIS Group Co. Ltd.Tangshan 063020China College of Metallurgy and Energy North China University of TechnologyTangshan 063210China

Blast furnace data processing is prone to problems such as *** overcome these problems and identify an improved method for processing blast furnace data,we conducted an in-depth study of blast furnace *** on data samples from selected iron and steel companies,data types were classified according to different characteristics;then,appropriate methods were selected to process them in order to solve the deficiencies and outliers of the original blast furnace *** interpolation was used to fill in the divided continuation data,the Knearest neighbor(KNN)algorithm was used to fill in correlation data with the internal law,and periodic statistical data were filled by the *** error rate in the filling was low,and the fitting degree was over 85%.For the screening of outliers,corresponding indicator parameters were added according to the continuity,relevance,and periodicity of different ***,a variety of algorithms were used for *** the analysis of screening results,a large amount of efficient information in the data was retained,and ineffective outliers were *** processing of blast furnace big data as the basis of applied research on blast furnace big data can serve as an important means to improve data quality and retain data value.

关键词： blast furnace data missing outliers data processing data mining

Subfoveal choroidal thickness and volume in severe internal carotid artery stenosis patients

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International Journal of Ophthalmology(English edition) 2017年第12期10卷 1870-1876页

作者： Hui Wang Yan-ling Wang hong-yang li Department of Ophthalmology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

AIM：To demonstrate the differences of retinal and choroidal structure changes in internal carotid artery（ICA） patients of China by enhanced-depth imaging optical coherence tomography（EDI-OCT）.METHODS：A retrospective review was conducted of 46 patients with a diagnosis of ICA stenosis greater than 65% on only one side（the opposite ICA Stenosis had less than 40% stenosis） from June 2015 through June *** of the patients were combined with amaurosis fugax,but without any abnormality with other ocular *** and volume of choroid and retina were manually measured by *** were compared between ICA stenosis eyes and fellow ***：There were no significant differences in the retinal thickness,macular retinal nerve fiber layer（m RNFL） thickness,inner thickness,or outer retinal thickness between the ICA Stenosis group and the control group（P=0.834,0.187,0.552,and 0.903,respectively）.The mean central choroidal thickness of the ICA Stenosis group was significantly lower than that of the control group（239.70±23.76 μm vs 257.46±22.13 μm,P〈0.001）.The percentage of ICA stenosis was significantly associated with the central choroidal thickness,central retinal thickness,foveal center choroidal volume,and foveal center retinal volume（r=0.854,0.678,0.729,and 0.785,respectively;P〈0.001）.There were no significant differences in the retinal and choroidal volume values in the 4 inner and 4 outer sectors between the two ***：The choroidal thickness in severe ICA stenosis eyes is lower than in fellow *** choroidal thinning may occur before the retinal changes in patients with ocular ischemic *** of choroidal thickness may be useful to choose the optimal therapeutic schedule for ICA patients.

关键词： ophthalmic artery internal carotid artery ocular ischemic syndrome optical coherence tomography

ABSTRACTS——From Journal of Iron and Steel Research(in Chinese)

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Journal of Iron and Steel Research International 2002年第2期9卷 1-6页

作者： yang li hong yang Wen yuan ZHENG Cong jie CUI Jian JIANG Xiao fang Central Iron&Steel Research Institute Baoshan Iron and Steel Group Co

The electrochemical nature of reaction between melt and slag in a closed system was worked out. Experimental results demonstrated that both the rate and reaction extent increase when the electronic conductor or voltage was applied between melt and slag. The bigger the contact area of the conductor with melts is, the faster the reaction rate is. With the increase of applied voltage which is beneficial for electron's migration between metal and slags, the rate and extent of reaction increase.

关键词： metal slag reaction electrochemistry electronic conduction

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Imageology of internal carotid artery siphon in nonarteritic anterior ischaemic optic neuropathy

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International Journal of Ophthalmology(English edition) 2020年第12期13卷 1941-1947页

作者： Zhi-Yong Fu hong-yang li Yan-ling Wang Department of Ophthalmology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

AIM:To evaluate whether narrowing of internal carotid artery siphon(ICAS)may increase the risk of developing non-arteritic anterior ischaemic optic neuropathy(NAION).METHODS:Totally 30 consecutive patients who had unilateral NAION and 30 gender-matched control subjects were recruited in the present *** diameter of ICAS of all the participants were measured using head-and-neck computed tomographic angiography(CTA).Color doppler flow imaging(CDI)was used to measure the haemodynamics parameters of ICAS and short posterior ciliary arteries(SPCAs)in all *** of parameters between the NAION patients and controls as well as between the two sides within the patients were *** correlation between the diameter of ICAS and NAION was ***:A comparison of parameters between the affected side of the NAION patients and the controls,including the diameter of ICAS,the resistance index(RI)of ICAS,the blood flow velocities of SPCAs and RI of SPCAs,showed significantly difference(Plic velocity(PSV)of SPCAs and end diastolic velocity(EDV)of SPCAs in patients with NAION(r=0.514,P<0.01 and r=0.418,P<0.05,respectively).CONCLUSION:Narrowing of ICAS may increase the risk of developing NAION.

关键词： internal carotid artery siphon imageology haemodynamics parameter non-arteritic anterior ischaemic optic neuropathy

Fabrication of Porous Nanocrystalline NiCo_2O_4 Electrode for Water Electrolysis

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稀有金属材料与工程 2006年第A3期35卷 646-647页

作者： Jun yang Xiaozhan yang Jianbao li hong lin Ning Wang Chunfu lin Gangfeng Guo State Key Lab of New Ceramics ＆ Fine Processing Department of Materials Science ＆ Engineering Tsinghua University Beijing 100084 China

A porous nanocrystalline NiCo_2O_4 compound electrode was *** morphology of the electrode was controlled by altering the concentration of precipitant (NaOH solution).The electrode was consisted of metal substrate (Ni) and porous nanocrystalline NiCo_2O_4 film which was stacked by homosized and pretty regular hexagonal nanoparticles,with thinner than 50 nm and about 200 nm in *** electrode exhibits good electrochemical properties compared with Ni electrode.

关键词： electrophoretic deposition nanocrystalline NiCo2O4 porous water electrolysis

Euler Characteristic and Topological Phase Transition of NUT-Kerr-Newman Black Hole

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Communications in Theoretical Physics 2008年第4期49卷 941-944页

作者： YUE Jing-Hua yang Guo-hong TIAN li-Jun ZHU Shu Department of Physics Shanghai University Shanghai 200444 China

From the Gauss-Bonnet-Chern theorem, the Euler characteristic of NUT-Kerr-Newman black hole is calculated to be some discrete numbers from 0 to 2. We find that the Bekenstein-Hawking entropy is the largest entropy in topology by taking into account of the relationship between the entropy and the Euler characteristic. The NUT-Kerr- Newman black hole evolves from the torus-like topological structure to the spherical structure with the changes of mass, angular momentum, electric and NUT charges. In this process, the Euler characteristic and the entropy are changed discontinuously, which give the topological aspect of the first-order phase transition of NUT-Kerr-Newman black hole. The corresponding latent heat of the topological phase transition is also obtained. The estimated latent heat of the black hole evolving from the star just lies in the range of the energy of gamma ray bursts.

关键词： euler characteristic entropy NUT-Kerr-Newman black hole killing vector field

Rare neonatal malignant primary orbital tumors: Three case reports

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World Journal of Clinical Cases 2021年第26期9卷 7825-7832页

作者： Yan Zhang Yue-Yue li Han-yang Yu Xiao-li Xie Hui-Min Zhang Fang He hong-yang li Department of Ophthalmology The Seventh Medical Center of PLA General HospitalBeijing 100700China Department of Ophthalmology The Third Medical Center of PLA General HospitalBeijing 100039China Department of Pathology The Seventh Medical Center of PLA General HospitalBeijing 100700China Department of Ophthalmology The Eighth Medical Center of PLA General HospitalBeijing 100842China Beijing Friendship Hospital Capital Medical UniversityBeijing 100050China

BACKGROUND Aggressive malignant primary orbital tumors are extremely rare in *** current cases further clarify the clinical features of malignant primary orbital tumors in *** SUMMARY At the time of presentation at the Seventh Center of People’s liberation Army General(PLAG)Hospital,the children were 1-,2-and 5-mo-old,respectively,and included 2 boys and 1 *** three cases had unilateral proptosis at birth,and underwent mass excision and histopathologic examination.A peripheral primary neuroectodermal tumor,an aggressive infantile fibromatosis and an embryonic rhabdomyosarcoma were diagnosed,*** first case underwent routine chemotherapy following surgery but died within three months due to worsening condition as the tumor spread throughout the *** other two children were treated by surgery,and at the follow-up visits 6 mo and 1 year after surgery,respectively,the wound was completed healed,and they had normal growth and development without radiotherapy or chemotherapy.A review of highly uncommon orbital tumors in newborns is also *** Malignant primary tumors should be considered in the presence of unilateral proptosis in newborns.

关键词： Malignant primary orbital tumors Newborn Characteristics Treatment Outcome Case report

Prediction for permeability index of blast furnace based on VMD-PSO-BP model

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Journal of Iron and Steel Research International 2024年第3期31卷 573-583页

作者： Xiao-jie liu Yu-jie Zhang Xin li Zhi-feng Zhang hong-yang li Ran liu Shu-jun Chen School of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina Chengde Branch HBIS Group Co.Ltd.Chengde 067000HebeiChina

The permeability index is one of the important production indicators to monitor the operation of blast *** is crucial to grasp the trends of changes in the new permeability index in *** the complex vibration spectrum of the permeability index,a prediction model of the permeability index based on the VMD-PSO-BP(variational mode decomposition-particle swarm optimization-back propagation)method was ***,the key factors that affect the permeability index of blast furnace were studied from multiple ***,the permeability index was divided into multiple sub-modes based on the difference of frequency bands by the VMD algorithm,and a PSO-BP prediction model was established for each ***,the prediction results of each sub-mode were summed to obtain the final *** results show that the composite prediction accuracy by using the VMD algorithm is 3%higher than that of the traditional prediction method,which has better applicability.

关键词： Big data-Blast furnace Air permeability Variational mode decomposition Particle swarm optimization Back propagation Model prediction

A new gravity ＆ flotation separator with double-tailing discharge and its beneficiation performance

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Journal of Coal Science & Engineering(China) 2012年第2期18卷 191-195页

作者： yang hong-li FAN Min-qiang College of Mining Engineering Taiyuan University of TechnologyTaiyuan 030024China

Introduced a new gravity and flotation separator with double-tailing dtsctaarge tor nne coat~, u,u ,,,~,.~ cation and cyclone scavenging with flotation in an original way. The beneficiation performance of it was good. The results show that the gravity and flotation separator with double-tailing discharge can produce high-quality clean coal of 10.46% ash from free coal of 35.56% ash. It can discharge the fine and coarse tailings separately.

关键词： gravity and flotation separator double-tailing discharge beneficiation coal slime