检索结果-南通市图书馆

Baosteel Technical Research 2019年第4期13卷 20-29页

作者： he yutian XU Changzheng Research Institute Baoshan Iron & Steel Co.Ltd.

In this study,the solidified microstructure and segregation behaviors of the alloying elements and precipitate behaviors of the UNS N10276 alloy in a large-scale electroslag remelting(ESR)ingot were ***,the formation of the solidified microstructure and segregation of ESR were systematically analyzed via thermodynamic *** ESR ingot of the UNS N10276 alloy exhibits a typical dendritic *** secondary dendrite spacing at the head of the ingot is clearly larger than that at the bottom of the *** alloying elements(e.g.,Mo,Mn,Si,and C),which are positive segregation elements,segregate to the interdendritic zones during the solidification ***,Fe,W,and Cr segregate to the dendritic trunk zones,indicating that they are negative segregation *** the alloying elements,Mo segregates the most,especially at the head of the ESR *** of the precipitates that precipitate in the interdendritic zones and at grain boundaries belong to large-scale μ and M6C phases,*** is the main element of the *** precipitates at the head of the ESR ingot are more abundant and larger than those at the bottom of the ***,to improve the metallurgical quality and hot working properties of the UNS N10276 alloy,the segregation of the Mo element should be minimized,whereas the formation of the precipitates should be reduced as much as possible during the optimization of the composition and production processes.

关键词： alloy UNS N10276 solidified microstructure segregation precipitates thermodynamic calculation

Study of strip-shaped chromatic aberration defects on the surface of an electro-galvanized fingerprint-resistant sheet

在线全文

学校读者我要写书评

暂无评论

Baosteel Technical Research 2023年第2期17卷 7-14页

作者： he yutian HUANG Shengbiao ZHANG Baoping Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai 201999China Cold Rolling Mill Baoshan Iron&Steel Co.Ltd.Shanghai 201900China

Strip-shaped chromatic aberration defects on the surface of an electro-galvanized fingerprint-resistant sheet were systematically studied using Thermo-Calc thermodynamic calculations,scanning electron microscope and X-ray diffractometer analyses,and rapid heat treatment simulation *** formation mechanism of these defects was also *** results show a strong correlation between the defects and the uneven distribution of the Fe(001)component on the surface of the steel *** relatively high proportion of Fe(001)components on the surface of the steel substrate affects the distribution density of the Zn crystal cells in different orientations during the electrodeposition process,which causes the reflection intensity of the light of the galvanized layer to differ from various visual perspectives,and macroscopic strip-shaped chromatic aberration defects are finally *** high proportion of the Fe(001)component on the surface of the steel substrate is mainly related to the following two ***,when the strip steel is hot-rolled,the finishing hot-rolling temperature is close to theγ→αphase transition *** the local temperature on the upper surface of the strip steel is low,γ+αtwo-phase rolling easily occurs,and this results in an uneven stress distribution between theγandαphases after the hot-rolling *** uneven distribution of hot-rolling stress results in the formation of a coarse grain structure in the local area on the surface of the hot-rolled sheet,which strongly affects the subsequent cold rolling and annealing process,and the annealed steel sheet substrate ultimately contains a greater proportion of the Fe(001)*** second,a fast cooling rate(>10 K/s)during the slow cooling stage in the continuous annealing process inhibits the transformation of the Fe(001)to the Fe(111)component on the surface of the cold-rolled steel sheet,and it is then not possible to effectively eliminate the influence of the une

关键词： electro-galvanized fingerprint-resistant sheet strip-shaped chromatic aberration defects texture

Prediction of Formation Quality of Inconel 625 Clads Using Support Vector Regression

在线全文

学校读者我要写书评

暂无评论

Journal of Shanghai Jiaotong university(Science) 2020年第6期25卷 746-754页

作者： GUO Longlong WU Zebing he yutian WEI Wenlan XIA Shengyong JU Luyan WANG Bo ZHANG Yong Mechanical Engineering College Xian Shiyou UniversityXi'an 710065China Chongqing Engineering Technology Research Center for Light Alloy Materials and Processing Chongqing 404000China Refining and Chemical Plant of Yumen Oilfield Company Jiuquan 735000GansuChina

The process parameters of pulsed tungsten inert gas(PTIG)have a significant infuence on the forma-tion quality,mechanical properties and corrosion resistance of the weld *** PTIG was utilized to deposit Inconel 625 clads with various combinations of the process parameters,which were determined by the central composite design(CCD)*** on the experimental results,the relationship between process parameters of PTIG and formation quality of the Inconel 625 clads was established using support vector regression(SVR)with different kernel functions,including polynomial kernel function,radial basis function(RBF)kernel function,and sigmoid kernel *** results indicate that the kernel functions have a great influence on the prediction of height,width and *** models with RBF kernel function feature the best goodness of fitting and the most accurate against the other SVR models for estimating the height and the ***,the model with polynomial kernel function is superior to the other SVR models for predicting the ***,the prediction performance of the SVR models was compared with the general regression *** results demonstrate that the optimized SVR model is much better than the general regression model in the prediction performance.

关键词： pulsed tungsten inert gas(PTIG) Inconel 625 formation quality,prediction support vector regres-sion(SVR)

17β-Estradiol,through activating the G protein-coupled estrogen receptor,exacerbates the complication of benign prostatic hyperplasia in type 2 diabetes mellitus patients by inducing prostate proliferation

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

Journal of Pharmaceutical Analysis 2024年第9期14卷 1372-1386页

作者： Tingting Yang Zhen Qiu Jiaming Shen yutian he Longxiang Yin Li Chen Jiayu Yuan Junjie Liu Tao Wang Zhenzhou Jiang Changjiang Ying Sitong Qian Jinfang Song Xiaoxing Yin Qian Lu Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Xuzhou Medical UniversityXuzhouJiangsu221004China Department of Urology The Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu221006China Department of Pharmacy The Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu221006China New Drug Screening Center Jiangsu Center for Pharmacodynamics Research and EvaluationChina Pharmaceutical UniversityNanjing210009China Department of Endocrinology The Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu221006China Department of Pharmacy The Affiliated Hospital of Jiangnan UniversityWuxiJiangsu214000China

Benign prostatic hyperplasia(BPH)is one of the major chronic complications of type 2 diabetes mellitus(T2DM),and sex steroid hormones are common risk factors for the occurrence of T2DM and *** profiles of sex steroid hormones are simultaneously quantified by LC-MS/MS in the clinical serum of patients,including simple BPH patients,newly diagnosed T2DM patients,T2DM complicated with BPH patients and matched healthy *** G protein-coupled estrogen receptor(GPER)inhibitor G15,GPER knockdown lentivirus,the YAP1 inhibitor verteporfin,YAP1 knockdown/overexpression lentivirus,targeted metabolomics analysis,and Co-IP assays are used to investigate the molecular mechanisms of the disrupted sex steroid hormones homeostasis in the pathological process of T2DM complicated with *** homeostasis of sex steroid hormone is disrupted in the serum of patients,accompanying with the proliferated prostatic epithelial cells(PECs).The sex steroid hormone metabolic profiles of T2DM patients complicated with BPH have the greatest degrees of separation from those of healthy *** 17β-estradiol(E2)is the key contributor to the disrupted sex steroid hormone homeostasis,and is significantly positively related to the clinical characteristics of T2DM patients complicated with *** GPER by E2 via Hippo-YAP1 signaling exacerbates high glucose(HG)-induced PECs proliferation through the formation of the YAP1-TEAD4 *** or inhibition of GPER-mediated Hippo-YAP1 signaling suppresses PECs proliferation in HG and E2 co-treated BPH-1 *** anti-proliferative effects of verteporfin,an inhibitor of YAP1,are blocked by YAP1 overexpression in HG and E2 co-treated BPH-1 *** E2/GPER/Hippo/YAP1 signaling may be effective at delaying the progression of T2DM complicated with BPH by inhibiting PECs proliferation.

关键词： Sex steroid hormone homeos tasis Proliferation 17β-Estradiol G protein-coupled estrogen receptor T2DM complicated with BPH Hippo-YAP1 signaling

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

相近刃缘条件下不同铲板结构的切削阻力研究

中南大学学报（自然科学版） 2016年第12期47卷 4056-4061页

作者：贺雨田吕彭民长安大学道路施工技术与装备教育部重点实验室陕西西安710064 西安特种设备检验检测院陕西西安710065

针对减小平面铲板切削倾角和加装水平铲刀2种方式,对平面铲板结构进行改进,并将2种方式得到的铲板分别视为简单铲板和复杂铲板。引入不同铲板结构刃缘相近的概念,使设计的3组简单铲板和复杂铲板具有相近刃缘前移距离,且平均前移距离分别... 详细信息

针对减小平面铲板切削倾角和加装水平铲刀2种方式,对平面铲板结构进行改进,并将2种方式得到的铲板分别视为简单铲板和复杂铲板。引入不同铲板结构刃缘相近的概念,使设计的3组简单铲板和复杂铲板具有相近刃缘前移距离,且平均前移距离分别为56.8,114.6和187.8 mm。以级配土为切削对象,采用自行设计的切削装置对3组铲板分别在30,60和90 mm这3种不同切削深度下进行土壤切削阻力对比试验。研究结果表明:有4组试验的简单铲板结构切削阻力小于复杂铲板结构的切削阻力,另有4组试验的2种铲板结构切削阻力基本接近,仅有1组试验的简单铲板结构切削阻力相对偏大。因此,在铲板切削刃缘相近的条件下,对于只考虑切削阻力的土壤切削过程,采用简单铲板结构代替复杂铲板结构是工程实际中有效可行的办法。

关键词：平面铲板死区刃缘土壤切削切削阻力水平铲刀

在线全文

学校读者我要写书评

暂无评论

DH780钢的热变形行为及热加工图

金属热处理 2020年第6期45卷 114-119页

作者：王俊峰何煜天宝山钢铁股份有限公司中央研究院上海201900 汽车用钢开发与应用技术国家重点实验室(宝钢) 上海201900

采用Thermecmastor-Z热模拟试验机研究了试验钢在800~1150℃、应变速率0.01~10 s-1的热压缩变形行为,并观察变形后显微组织。基于试验数据分析,确定了试验钢在奥氏体区的热变形方程,建立试验钢在0.8真应变下的热加工图。结果表明:试验... 详细信息

采用Thermecmastor-Z热模拟试验机研究了试验钢在800~1150℃、应变速率0.01~10 s-1的热压缩变形行为,并观察变形后显微组织。基于试验数据分析,确定了试验钢在奥氏体区的热变形方程,建立试验钢在0.8真应变下的热加工图。结果表明:试验钢的流变应力和峰值应变随变形温度的升高而减小;试验钢在奥氏体区的热变形激活能为385.91 k J/mol。根据试验钢功率耗散及流变失稳判据确定最佳热加工工艺参数为热变形温度范围1050~1150℃和应变速率0.01~0.1 s-1。在该范围内,试验钢发生完全动态再结晶,功率耗散系数为17%~32%。

关键词： DH钢热变形热加工图流变失稳

Characteristics of Water Type Distribution and Seasonal Variations in the Southern East China Sea

在线全文

学校读者我要写书评

暂无评论

Marine Science Bulletin 1999年第1期1卷 11-24页

作者： Miao yutian, Yu Honghua, he Dehua and Wang Chunsheng Second Institute of Oceanography, SOA , Hangzhou 310012

By using the data of Summer and Winter 1987, Spring and Autumn 1988 obtained by the R/V " Shijian" during the China-Japan Joint Research Program on Kuroshio, the paper makes an analysis and research on the water type distribution and its variations in the studied sea area. Trie results of which are mainly as follows: (1) The Class IV mixing water whose property is similar to that of the continental coastal water is located in the northeast sea area, along the coast of the continent in autumn and winter while extending to the open sea in spring and summer. (2) The boundary between the Kuroshio water and the shelf mixing water (called the left boundary of the Kroshio water) is approximately located in between the 100m and 200m isobaths in various seasons and various layers, and mostly near the 200m isobath. In the sea area northeast of Taiwan, the Kuroshio water is to the west most in spring and then in winter. In summer, it is to the east most while, in autumn, it is in between its positions in summer

关键词： Southern East China Sea water type distribution seasonal variation

供应链视角下成长型企业债转股比例的模型分析

在线全文

学校读者我要写书评

暂无评论

系统科学与数学 2024年第10期44卷 2994-3010页

作者：王宇何雨恬李鑫重庆理工大学管理学院重庆400054 重庆工商大学成渝地区双城经济圈建设研究院重庆400067 重庆工商大学金融学院重庆400067

债转股是新经济形势下降低企业杠杆率的重要举措,但目前市场化债转股陷入“签约多、落地少”的困境,极大地降低了债转股的实施成效.文章基于供应链运营视角构建了陷入债务危机的成长型供应商的债转股模型,探讨了实施机构的最优转股比例... 详细信息

债转股是新经济形势下降低企业杠杆率的重要举措,但目前市场化债转股陷入“签约多、落地少”的困境,极大地降低了债转股的实施成效.文章基于供应链运营视角构建了陷入债务危机的成长型供应商的债转股模型,探讨了实施机构的最优转股比例和供应商的最优运营决策,分析了双方的债转股实施条件和多方博弈行为产生的影响.研究发现:实施机构在高市盈率时选择将全部股权转换为债权,在低市盈率时将最优转股比例制定为供应商愿意实施债转股的最低水平;高成长性和高市盈率的合理匹配有助于债转股的顺利实施,实现双方共赢,高成长性和低市盈率的错配仅能化解债务危机,供应商盈利能力无法提升,而低成长性供应商不应成为债转股标的企业.此外,零售商参与的多方博弈有损供应商和实施机构的利益,甚至在供应商成长性较低时易陷入“囚徒困境”,增加了债转股实施的难度.

关键词：转股比例实施条件多方博弈供应链

在线全文

学校读者我要写书评

暂无评论

绿色金融改革创新与制造业ESG表现

贵州财经大学学报 2024年第5期 28-37页

作者：孙芳城何雨恬重庆工商大学成渝地区双城经济圈建设研究院重庆400067

利用2017年国务院批准设立绿色金融改革创新试验区作为准自然实验,选取2009~2022年A股上市制造业企业为样本,使用双重差分法实证检验设立绿色金融改革创新试验区对制造业ESG表现的影响。作用机制检验表明,绿色金融改革创新试验区的设立... 详细信息

利用2017年国务院批准设立绿色金融改革创新试验区作为准自然实验,选取2009~2022年A股上市制造业企业为样本,使用双重差分法实证检验设立绿色金融改革创新试验区对制造业ESG表现的影响。作用机制检验表明,绿色金融改革创新试验区的设立有助于缓解制造业的融资约束、提高盈利能力和提升企业市场价值,进而对制造业的ESG表现产生积极影响。进一步研究发现,设立绿色金融改革创新试验区对制造业ESG表现的影响存在异质性,该影响主要集中在东部地区、市场化程度较高和非重污染的企业中。研究结论在理论上为提升企业ESG表现提供了新视角,在实践上为利用绿色金融政策推动企业绿色转型升级和可持续发展提供了政策启示。

关键词：绿色金融 ESG表现融资约束盈利能力市场价值

论资产担保债券的增信手段——首支中国绿色资产担保债券的启示

在线全文

学校读者我要写书评

暂无评论

征信 2017年第7期35卷 56-59,65页

作者：何雨田华东政法大学经济法学院上海200042

2016年,中国银行在伦敦成功发行首支中国绿色资产担保债券并取得较高的信用评级。发行主体本身的高信用、对资产池的充足监管、资产监管人首创的预先授权机制等,都是本期债券取得高评级的原因。对本期债券增信手段的分析为今后资产担保... 详细信息

2016年,中国银行在伦敦成功发行首支中国绿色资产担保债券并取得较高的信用评级。发行主体本身的高信用、对资产池的充足监管、资产监管人首创的预先授权机制等,都是本期债券取得高评级的原因。对本期债券增信手段的分析为今后资产担保债券提高信用等级带来重要启示:金融机构乃至国家要提升自身信用水平、对资产进行充足监管、为方便债权实现进行制度创新、借鉴资产证券化的破产隔离手段、政府要进行有力监管。

关键词：绿色资产担保债券信用评级信用增级增信手段