检索结果-南通市图书馆

magnesium-containing pellet regulating blast furnace ferrous burden interaction:softening-melting behavior and mechanism

引用

Journal of Iron and Steel Research International 2024年第7期31卷 1623-1635页

作者： li-ming ma Jian-liang Zhang Yao-zu Wang Xiao-yong ma Gui-lin Wang Zhuo li Hui-qing Jiang Zheng-jian liu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China School of Intelligence Science and Technology University of Science and Technology BeijingBeijing 100083China lingyuan Iron and Steel Group Co. Lingyuan 122500LiaoningChina

MgO participates in all stages of sintering,pelletizing,and blast furnace ironmaking,and synergistically optimizing the distribution of MgO in ferrous burden can effectively enhance the interaction within the ferrous burdens and optimize the softening-melting properties of the mixed ***-containing pellets mixed with low-MgO sinter or mixed with high-MgO sinter in the blast furnace ferrous burden structure have opposite softening-melting performance *** the structure of the ferrous burden is magnesium-containing pellets mixed with low-MgO sinter,the magnesium-containing pellets can enhance the interaction of the ferrous burden in the process of softening-melting,which can optimize the composition of the slag phase and improve the slag *** the structure of the ferrous burden is magnesium-containing pellets mixed with high-MgO sinter,the magnesium-containing pellets weaken the interaction of the ferrous burden in the process of softening-melting,increase the content of the high melting point solid-phase particles in the slag,lead to an increase in the viscosity of the slag and difficult separation of the slag and iron,and decrease the permeability of the charge ***,to ensure good permeability of the mixed burden,the following measures are suggested:optimizing the MgO distribution of the ferrous burden,reducing the MgO content of the sinter to 1.96 wt.%,increasing the MgO content of the pellets to 1.03-1.30 wt.%,controlling the MgO/Al_(2)O_(3) ratio of the mixed burden within 1.15-1.32,narrowing the position of the cohesive zone,and maintaining an S value(permeability index)of approximately 150 kPa℃.

关键词： Ironmaking Ferrous burden Softening-melting property Interaction Permeability Slag

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A quantitative investigation on consolidation of titanium-containing pellets during roasting process

引用

Journal of Iron and Steel Research International 2023年第1期30卷 40-50页

作者： Yao-zu Wang Jian-liang Zhang Zhi-hui Chen Zheng-jian liu Chen-yang Xu Yu-meng li li-ming ma Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China College of Artificial Intelligence North China University of Science and TechnologyTangshan 063210HebeiChina

The measurement method and quantitative indexes of iron ore consolidation characteristic temperature(CCT)during roasting,including consolidation starting temperature,highest consolidation rate temperature,and consolidation termination temperature,were improved based on previous *** mineral properties of V-Ti magnetite(Panzhihua)were analyzed,and the CCT of V-Ti magnetite was *** investigate the effect of mineral types on CCT,a series of trials were carried out by using various ores,including high-grade magnetite ore,high silicon iron ore,and V-Ti magnetite *** greatest shrinkage of V-Ti magnetite was 6.7%,the consolidation starting temperature was 991℃,and the termination temperature was 1384℃.The results of X-ray diffraction analysis indicated that the V-Ti magnetite ore was composed of titanomagnetite,peridotite,and other minerals,which is more complicated than conventional *** a result,the temperature at the maximum rate of consolidation and the temperature at the termination of consolidation are the ***_(3) and MgFe_(2)O_(4) in V-Ti magnetite may inhibit the creation of sinter necks between hematite *** phase occurs inside the pellet when the temperature surpasses 1250℃,which may accelerate particle growth and the formation of a sintering neck within the pellets.

关键词： Consolidation index Iron ore pellet Mineralogical characteristics V-Ti magnetite

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of organic binders on the activation and properties of indurated magnetite pellets

引用

International Journal of Minerals,Metallurgy and materials 2021年第7期28卷 1145-1152页

作者： Cui Wang Chen-yang Xu Zheng-jian liu Yao-zu Wang Rong-rong Wang li-ming ma State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Department of Ferrous Metallurgy RWTH Aachen UniversityIntzestraße 152072 AachenGermany

In the ironmaking process,the addition of an organic binder to replace a portion of bentonite has the potential to improve the per-formance of *** interaction between original bentonite(OB)and organic binder was *** indicated that the micromor-phology of organic composite bentonite(OCB)became porous and the infrared difference spectrum exhibited a curved *** addition,the residual burning rates of OB and organic binder were determined to be 82.72%and 2.30%,***,the influence of OCB on the properties of pellets was *** compressive strength of OCB-added green pellets(14.7 N per pellet)was better than that of OB-ad-ded pellets(10.3 N per pellet).Moreover,the range of melting temperature of OCB-added green pellets(173℃)was narrower than that of OB-added pellets(198℃).The compressive strength of OCB-added green pellets increased from 2156 to 3156 N per pellet with the increase in roasting temperature from 1200 to 1250℃.

关键词： pellets organic composite bentonite softening-melting property interaction behavior

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A chromosome-level reference genome of nonheading Chinese cabbage[Brassica campestris(*** rapa)***]

引用

Horticulture Research 2020年第1期7卷 1-13页

作者： Ying li Gao-Feng liu li-ming ma Tong-Kun liu Chang-Wei Zhang Dong Xiao Hong-Kun Zheng Fei Chen Xi-lin Hou State Key Laboratory of Crop Genetics&Germplasm Enhancement Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(East China)Ministry of Agriculture and Rural Affairs of the P.R.ChinaEngineering Research Center of Germplasm Enhancement and Utilization of Horticultural CropMinistry of Education of the P.R.ChinaCollege of HorticultureNanjing Agricultural UniversityNanjing 210095China Biomarker Technologies Corporation Beijing 101300China

Non-heading Chinese cabbage(NHCC)is an important leafy vegetable cultivated ***,we report the first high-quality,chromosome-level genome of NHCC001 based on PacBio,Hi-C,and Illumina sequencing *** assembled NHCC001 genome is 405.33 Mb in size with a contig N50 of 2.83 Mb and a scaffold N50 of 38.13 *** 53%of the assembled genome is composed of repetitive sequences,among which long terminal repeats(LTRs,20.42%of the genome)are the most *** Hi-C data,97.9%(396.83 Mb)of the sequences were assigned to 10 *** assessment showed that this *** NHCC001 genome assembly is of better quality than other currently available *** assemblies and that it contains 48,158 protein-coding genes,99.56%of which are annotated in at least one functional *** genomic analysis confirmed that *** NHCC001 underwent a whole-genome triplication(WGT)event shared with other Brassica species that occurred after the WGD events shared with *** related to ascorbic acid metabolism showed little variation among the three *** *** numbers of genes involved in glucosinolate biosynthesis and catabolism were higher in NHCC001 than in Chiifu and Z1,due primarily to tandem *** newly assembled genome will provide an important resource for research on ***,especially *** ***.

关键词： heading fir cultivated

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Activity and Composition of Ammonia-Oxidizing Bacteria in an Aquic Brown Soil as Influenced by Land Use and Fertilization

引用

Pedosphere 2010年第6期20卷 789-798页

作者： YU Wan-Tai,XU Yong-Gang,BI ming-li,ma Qiang and ZHOU Hua Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016 (China) [a] Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 (China)

The effects of long-term (19 years) different land use and fertilization on activity and composition of ammonia-oxidizing bacteria (AOB) in an aquic brown soil were investigated in a field experiment in liaoning Province,*** 19-year experiment conducted from 1990 to 2008 involved seven treatments designed: cropping rotation of soybean-corn-corn with no fertilizer (control,CK),recycled manure (RM),fertilizer nitrogen (N),phosphorous (P) and potassium (K) (NPK),NPK+RM,and no-crop bare land,mowed fallow,and non-mowed *** results showed that the potential nitrification rates of the RM,NPK+RM,mowed fallow,and non-mowed fallow treatments were significantly higher (P lications of recycled manure and return of plant residues both significantly increased the activity of *** the application of NPK did not enhance soil potential nitrification because of decreased pH,available K had an important effect on potential *** gradient gel electrophoresis (DGGE) fingerprint profiles showed that no-crop treatments had an increase in the diversity of the AOB community compared to the CK,RM,and NPK treatments,implying that agricultural practices,especially tillage,had an adverse effect on the soil AOB *** NPK+RM treatment had the most diverse DGGE patterns possibly because of the increased available P in this treatment.A phylogenetic analysis showed that most of the DGGE bands derived belonged to Nitrosospira cluster 3,not Nitrosospira cluster *** demonstrated that different land use and fertilization significantly influenced the activity and composition of the AOB community by altering the soil properties,mainly including pH,total C,available K,and available P.

关键词： community composition denaturing gradient gel electrophoresis nitrification Nitrosospira phylogenetic analysis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and Characterization of a Proton-transfer Complex of 1,2,4,5-benzenetetracarboxylic Acid with 1,10-phenanthroline

引用

Journal of Wuhan University of Technology(materials Science) 2005年第4期20卷 38-42页

作者：孙聚堂 Department of Chemistry Wuhan University Wuhan 430072 China

A proton-transfer complex of 1,2,4,5-benzenetetracarboxylic acid（H4 BTC）with 1,10-phenanthroline（phen）[（H2BTC）^2-·2（Hphen）^＋·（H4BTC）]was synthesized and characterized by IR,UV-Vis spectra and luminescence. The structure was determined by X-ray single crystal *** crystallizes in the triclinic system,space group P-1 with a=7.3767（15）,b=10.704（2）,c=12.890（3）A.α=102.96（3）,β105.71（3）,γ=99.68（3）°,V=926.0（3）A^3,Dc=1.558g/cm^3,Z=2,μ（Mo-Kα）=0.121mm^-1 and F（000）=*** final R=0.0401 and wR=0.0862 for 2983 observe reflections with[1〉2σ（I）].It is composed of discrete H4 BTC molecules,H2BTC^2- ANIONS AND [Hphen]^＋ *** extensive hydrogen-bonding associations fonned between the H4 BTC molecules and H2BTC^2- anions result in the formation of a two-dimensional layer,to which the [Hphen]^＋ cations are attached through the hydrogen bonds formed between the carboxyl groups of H4 BTC and the NH groups of [Hphen]^＋.Under the excitation of UV *** emits an intense blue luminescence.

关键词： proton-transfer 1,2,4,5-benzenetetracarboxylic acid 1,10-phenanthroline

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ZYZ451 Protects cardiomyocytes from hypoxia-induced apoptosis by enhancing MnSOD and STAT3 interaction

引用

中国药理学与毒理学杂志 2015年第S1期29卷 27-28页

作者： Shan-shan LUO Ya-qi SHEN li-ming ma Xian-feng GU Yi-zhun ZHU Department of Pharmacology School of Pharmacy Fudan University Shanghai 201203 China Department of Medicinal Chemistry School of Pharmacy Fudan University Shanghai 201203 China Department of Pharmacology Loo Yong Lin School of Medicine National University of Singapore Singapore

OBJECTIVE 3,5-Dimethoxy-4-(2-amino-3-prop-2-ynylsulfanyl-propionyl)-benzoic acid 4-guanidino-butyl ester(ZYZ451)showed excellent cardio-protective effects in our previous ***,its therapeutic potential in vivo and the mechanism remained to be ***,we evaluated cardiac protective role of ZYZ451 in post-myocardial infarction(post-MI)rats,and elucidated the underlying *** Neonatal rat ventricular cardiomyoctys(NRVCs)were separated and subjected to pre-deoxidized(1%O2,5%CO2),and serum-free medium for 4h to obtain ischemic *** ROS,MnSOD activity and cell apoptosis were tested to verify the cardiac protective effects of *** and siRNA for Stat3 were used to determine role of Stat3 played in cardio-protective effectes of *** were isolated from NRVCs to determine expression of Stat3 and *** and coimmunoprecipitation were conducted to determine the interaction between MnSOD and *** apply post-MI model in rats,the rats were subjected to ligation of LAD except for control *** vehicle or ZYZ451(1,2or 5mg·kg-1)or mixture of Leonurine and SPRC(15mg·kg-1)was administered 7dbefore and 3more days after the *** at risk(AAR),apoptosis in AAR,LDH and MDA levels,and MnSOD activity and expression were detected to evaluate the cardiac *** mitochondria were isolated to determine MnSOD and Stat3 expression in ischemia,and coimmunoprecipitaion was performed to verify the interaction between MnSOD and Stat3 in *** ZYZ451 prevented hypoxia induced NRVCs apoptosis via increasing MnSOD activity and inhibiting mitochondrial ROS ***,5,15-DPP(STAT3phosphorylation inhibitor)failed to inhibit MnSOD activity,while knockout of STAT3 resulted in significant reduction of MnSOD activity,followed by increased mitochondrial ROS production and cardiomyocytes apoptosis in ***,protective effects of ZYZ451 were blunted in Stat3 deficient

关键词： hypoxia acute myocardial infarction ROS MnSOD apop

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Local magnetic moment oscillation around an Anderson impurity on graphene

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai li Zhen ma Jin-Hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

基于旋转因子变换插值的电压闪变检测算法

引用

电工技术学报 2016年第22期31卷 178-185页

作者：李兰芳马明盛超王泽广东电网公司电力科学研究院广州510080 四川大学电气信息学院成都610065

IEC 61000—4—15标准中的闪变仪是基于调幅波调制模型,需要经过一系列的二次方、滤波及统计等流程,其缺点是流程复杂,不利于数字闪变仪的设计。基于此,首先从数学模型上推导了IEC标准下闪变检测机理,为数字闪变仪的设计和校验提供理论... 详细信息

IEC 61000—4—15标准中的闪变仪是基于调幅波调制模型,需要经过一系列的二次方、滤波及统计等流程,其缺点是流程复杂,不利于数字闪变仪的设计。基于此,首先从数学模型上推导了IEC标准下闪变检测机理,为数字闪变仪的设计和校验提供理论依据;然后根据IEC闪变检测中存在的问题提出了基于旋转因子变换插值的闪变检测算法,通过对频谱进行旋转因子变换,再利用谱线叠加插值思想来抑制频谱泄漏和消除栅栏效应,实现了高精度估计间谐波参数,从而间接计算闪变参数。简化了闪变检测流程,减小了频谱泄漏的影响,使得闪变检测精度提高。所提方法还可以计算出多个调幅波分量的单独闪变贡献值,仿真和实际测量结果均验证了所提方法的准确性和有效性。

关键词：电压闪变检测旋转因子变换插值间谐波频谱分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

enoscrotal extramammary Paget＇s disease： surgical Iechniques and follow-up experiences with thirty patients

引用

Asian Journal of Andrology 2013年第4期15卷 508-512,I0008,I0009页

作者： Qi Chen Yan-Bo Chen Zhong Wang Zhi-Kang Cai Yu-Bing Peng Da-Chao Zheng li-ming ma Hai-Jun Yao Juan Zhou Department of Urology and Andrology Ninth People's Hospital School ot Medicine Shanghai Jiaotong University Shanghai 200011 China

To report the surgical management, complications and prognosis of patients with penoscrotal extramammary Paget＇s disease （EMPD） at different clinical stages. Between 2003 and 2008, a total of 30 male patients with penoscrotal EMPD were enrolled and evaluated. All enrolled subjects received frozen biopsy-guided local wide resection and immediate reconstruction. Patients were followed every 3 months postoperatively. Among the 30 patients who accepted and underwent frozen biopsy-guided local wide resection treatment and reconstruction, two （6.7%） cases exhibited positive margins, verified by pathological examination, and underwent re-excision after surgery. The technique of primary closure or an adjacent flap was used in 10 （33.3%） cases, split-thickness skin grafts were used in 15 （50%）, and an anterolateral thigh perforator flap was used in five cases （16.7%）. The postoperative complications were acceptable. The mean follow-up time was 64.9__.29.6 months. Of all 30 cases, 22 patients （73.3%） survived with no evidence of recurrence, four patients （13.3%） exhibited local recurrence, two patients （6.7%） exhibited both local recurrence and distant metastasis and the remaining two patients （6.7%） exhibited distant metastasis. Five patients died from metastasis or cachexia. Current surgical techniques, including primary closure, adjacent flaps, *** skin flaps and anterolateral thigh perforator flaps are able to reconstruct all types of defects with acceptable complications. Some patients with negative margins went on to exhibit local recurrence, potentially due to adnexal carcinoma or internal malignancy.

关键词：

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：