检索结果-南通市图书馆

Effect of H2 addition on process of primary slag formation in cohesive zone

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2020年第2期27卷 132-140页

作者： Ya-na Qie qing lyu Chen-chen Lan Shu-hui Zhang Ran Liu College of Metallurgy and Energy Key Laboratory for Advanced Metallurgy TechnologyNorth China University of Science and TechnologyTangshan 063009HebeiChina

Based on the technology of gas-injection blast furnace(BF),the characteristics of primary slag formation with H2 addition were *** results indicate that,compared with traditional BF,the primary melt is formed at a lower temperature,which promotes the deformation of the solid burden *** the increase in temperature and H2 content,the quantity of formed melt containing FeO decreases sharply,corresponding to the crystallization of solid 2CaO Si02 during reduction.A wider softening range and narrower melting zone could be found in the gas-injection BF with a higher reduction *** permeability of burden layer is ameliorated as a result of decreased melt *** influence of H2 on the high-temperature properties of burden is not so conspicuous when the H2 addition is from 10 to 15 vol.%against 5 to 10 vol.%.What is more,the slag shows a better liquidity with the decrease in basicity,owing to the transformation of melt composition from a primary phase field with high melting point to that with low melting *** process of slag forming in gas-injection BF is characterized by earlier melt formation,less primary slag,higher melting temperature,better permeability and better liquidity,and the phase compositions of primary slag are close to those of final slag.

关键词： Reduction degradation Primary slag formation Melt Hydrogen addition Gas-injection blast furnace

Effects of SiO_(2) on the preparation and metallurgical properties of acid oxidized pellets

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第4期28卷 629-636页

作者： Jian-guang Lu Chen-chen Lan qing lyu Shu-hui Zhang Jian-ning Sun School of Metallurgy Northeastern UniversityShenyang 110819China College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063009China HBIS Group Hansteel Company Handan 05600China

The effects of SiO_(2) content on the preparation process and metallurgical properties of acid oxidized pellets, including compressive strength, reduction, and softening–melting behaviors, were systematically *** structures, elemental distribution, and pore size distribution were varied to analyze the mechanism of the *** results show that with an increase in SiO_(2) content from 3.51 wt%to 7.18 wt%, compressive strength decreases from 3150 N/pellet to 2100 N/pellet and reducibility decreases from 76.5% to 71.4%.The microstructure showed that pellets with high SiO_(2) content contained more magnetite in the mineralogical ***, some liquid phases appeared, which hindered the continuous crystallization of ***, the softening–melting properties of the pellets clearly deteriorated as the SiO_(2) content *** increasing SiO_(2) content, the temperature range of the softening–melting zone decreased, and the maximum differential pressure and the comprehensive permeability index increased *** acid oxidized pellets are used as the raw materials for blast furnace smelting, it should be combined with high basicity sinters to improve the softening–melting behaviors of the comprehensive charge.

关键词： acid oxidized pellets SiO_(2)content metallurgical property mineralogical structure

Generating a CRISPR knockout mouse through a strong premature termination codon:a cautionary tale

在线全文

学校读者我要写书评

暂无评论

The Journal of Biomedical Research 2021年第2期35卷 174-178,1-4页

作者： qing Rex lyu Peng Yao Joseph M Miano Aab Cardiovascular Research Institute University of Rochester School of Medicine & Dentistry Rochester NY 14642 USA. Vascular Biology Center Medical College of Georgia at Augusta University Augusta GA 30912 USA. Institute of Biomedicine and Health Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China.

Dear Editor,Genetic inactivation or gene knockout(KO)has been a powerful method of elucidating gene function in *** traditional method of generating KO mice via targeting mouse embryonic stem cells through homologous ... 详细信息

关键词： knockout inactivation termination

Outlier screening for ironmaking data on blast furnaces

在线全文

学校读者我要写书评

暂无评论

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

Hot metal quality monitoring system based on big data and machine learning

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2023年第5期30卷 915-925页

作者： Ran Liu Zhi-feng Zhang Xin Li Xiao-jie Liu Hong-yang Li Xiang-ping Bu Jun Zhao qing lyu College of Metallurgy&Energy North China University of Science and TechnologyTangshan 063009HebeiChina Hangzhou Pailie Technology Co. Ltd.Hangzhou 310000ZhejiangChina Hebei Iron and Steel Group Tangshan Iron and Steel Co.Ltd.Tangshan 063009HebeiChina

The system of hot metal quality monitoring was established based on big data and machine learning using the real-time production data of a steel enterprise in China.A working method that combines big data technology with process theory was proposed for the characteristics of blast furnace production *** the data have been comprehensively processed,the independent variables that affect the target parameters are selected by using the method of multivariate feature *** use of this method not only ensures the interpretability of the input variables,but also improves the accuracy of the machine learning process and is more easily accepted by *** timely guidance on production,specific evaluation rules are established for the key quality that affects the quality of hot metal on the basis of completed predictions work and uses computer technology to build a quality monitoring system for hot *** online results show that the hot metal quality monitoring system established by relying on big data and machine learning operates stably on site,and has good guiding significance for production.

关键词： Hot metal Big data Machine learning Quality monitoring Feature engineering

Spongiosum-combined glanuloplasty reduces glans complications after proximal hypospadias repair

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2021年第5期23卷 532-536页

作者： Yi-qing lyu Lin Yu Hua Xie Yi-Chen Huang Xiao-Xi Li Li Sun Yan Liang Fang Chen Department of Urology Shanghai Children's HospitalShanghai Jiao Tong UniversityShanghai 200040China

We aim to design a new glanuloplasty procedure combined with spongiosum to reduce the incidence of glans dehiscence and coronal fistula after proximal hypospadias *** who underwent urethroplasty by dorsal preputial island flap for proximal hypospadias between January 2014 and December 2016 were reviewed in this retrospective cohort *** who underwent spongiosum-combined glanuloplasty comprised the new-maneuver group,whereas those who underwent conventional glanuloplasty comprised the control *** incidence of complications was then *** the new-maneuver group,dysplastic corpus spongiosum alongside lateral Buck's fascia(0.3-0.4 cm wide)on both sides of the urethral plate was separated from the proximal normal spongy tissue,joining into the glans wings to increase tissue volume and covering the neourethra in the glans *** the control group,the neourethra was covered with superficial fascia under the coronal *** a result,the new-maneuver and control groups comprised 47 and 28 patients,*** the new-maneuver group,no glans dehiscence was detected;however,two(4.3%)patients had coronal fistula,two(4.3%)had urethral stricture,and four(8.5%)had *** the control group,two(7.1%)patients had glans dehiscence,eight(28.6%)had coronal fistula,four(14.3%)had urethral stricture,one(3.6%)had diverticulum,and one(3.6%)had penile curvature *** new-maneuver group had less incidences of coronal fistula(P<0.001),glans dehiscence(P=0.033),and urethral stricture(P=0.008)but had a higher incidence of diverticulum than the control group(P=0.040).It clearly demonstrates that spongiosum-combined glanuloplasty can significantly reduce the incidences of coronal fistula and glans dehisce.

关键词： glans dehiscence glanuloplasty hypospadias urinary fistula

Re:Commentary on"Spongiosum-combined glanuloplasty reduces glans complications after proximal hypospadias repair"

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2022年第6期24卷 676-676页

作者： Yi-qing lyu Fang Chen Department of Urology Shanghai Children's HospitalShanghai Jiao Tong UniversityShanghai 200040China

Dear Editor,We are happy to have our paper get the attention of Dr.Özbey and *** read their comment^(1)to our article attentively which raised concerns on our description of novel procedure of *** developed this procedure around 2014,and designed clinical observation from 2015 to 2016 to compare it with our former glanuloplasty in hypospadias *** is a penile ventral lesion in an inverted triangle area,with the division of spongiosum as the top point,the front of glans penis as the lower edge.

关键词： get triangle raised

ACC/AHA risk score for predicting the presence and severity of coronary artery disease in a Chinese population:a cross-sectional Study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2020年第22期133卷 2753-2755页

作者： Yao Wang Jie-Fang Zhang Song-Zan Chen qing-Bo lyu Xue lyu Wen-Bin Zhang Department of Cardiology Key Laboratory of Cardiovascular Intervention and Regenerative Medicine of Zhejiang ProvinceSir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhouZhejiang 310016.China

Coronary artery disease(CAD),the most common type of cardiovascular disease(CVD),remains the leading cause of mortality in both developing and developed countries,accounting for approximately 17.3 million deaths in 2013,higher than the data in 1990.111 The American College of Cardiology(ACC)/American Heart Association(AHA)score is one of the typical and accurate model to evaluate the 10-year risk of a first hard atherosclerotic cardiovascular disease(ASCVD)event based on a sex-and-race large Pooled Cohort ***,the present study aimed to investigate the association between the ACC/AHA risk score and the Gensini Score(GS)system,and determine whether ACC/AHA score could predict the presence and severity of CAD.

关键词： severity cardiovascular mortality

The association and underlying mechanism of the digit ratio(2D:4D)in hypospadias

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2024年第4期26卷 356-365页

作者： Yu Ding Zu-Quan Chen Wen-Feng Pan Hao-Jie Chen Min Wu Yi-qing lyu Hua Xie Yi-Chen Huang Zhong-Zhong Chen Fang Chen Department of Urology Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Urogenital Development Research Center Shanghai Children’s HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200062China Clinical Research Center for Hypospadias Pediatric CollegeShanghai Jiao Tong University School of MedicineShanghai 200062China.

The second-to-fourth digit(2D:4D)ratio is thought to be associated with prenatal androgen ***,the relationship between the 2D:4D ratio and hypospadias is poorly understood,and its molecular mechanism is not *** this study,by analyzing the hand digit length of 142 boys with hypospadias(23 distal,68 middle,and 51 proximal)and 196 controls enrolled in Shanghai Children’s Hospital(Shanghai,China)from December 2020 to December 2021,we found that the 2D:4D ratio was significantly increased in boys with hypospadias(P<0.001)and it was positively correlated with the severity of the *** was further verified by the comparison of control mice and prenatal low testosterone mice model obtained by knocking out the risk gene(dynein axonemal heavy chain 8[DNAH8])associated with ***,the discrepancy was mainly caused by a shift in *** characterization of a mouse model validated that low testosterone levels during pregnancy can impair the growth and development of *** mechanistic explorations revealed that during the androgen-sensitive window,the downregulation of the androgen receptor(AR)caused by low testosterone levels,as well as the suppressed expression of chondrocyte proliferation-related genes such as Wnt family member 5a(Wnt5a),Wnt5b,Smad family member 2(Smad2),and Smad3;mitochondrial function-related genes in cartilage such as AMP-activated protein kinase(AMPK)and nuclear respiratory factor 1(Nrf-1);and vascular development-related genes such as myosin light chain(MLC),notch receptor 3(Notch3),and sphingosine kinase 1(Sphk1),are responsible for the limitation of 4D growth,which results in a higher 2D:4D ratio in boys with hypospadias via decreased endochondral *** study indicates that the ratio of 2D:4D is a risk marker of hypospadias and provides a potential molecular mechanism.

关键词： androgen receptor digit ratio(2D:4D) endochondral ossification hypospadias testosterone level