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Grade 91钢抗蠕变性能的计算热力学研究 Article
Andrew Smith, Mohammad Asadikiya, Mei Yang, Jiuhua Chen, Yu Zhong
《工程(英文)》 2020年 第6卷 第6期 页码 644-652 doi: 10.1016/j.eng.2019.12.004
本研究旨在了解在焊接Grade 91(Gr.91)钢时,热影响区(HAZ)内不同的临界温度与第二相的稳定性之间的关系。IV型开裂出现在Gr.91钢的焊接热影响区。先前的研究表明,Gr.91钢的开裂失效与其抗蠕变性能有关,而Gr.91钢中第二相的稳定性对其抗蠕变性能有着举足轻重的影响。本研究运用计算热力学方法预测了Gr.91钢中的第二相,即M23C6相、MX相和Z相的稳定性。平衡凝固和Scheil凝固模拟方法分别被用于研究Gr.91钢在焊接过程中的相稳定性。本研究的模拟结果解释了Gr.91钢抗蠕变性能的影响机理,并为如何通过优化钢的成分、焊接和热处理工艺参数提高钢的高温抗蠕变性能提供了一种可行的解决方案。
李伟,李强,王平
《中国工程科学》 2011年 第13卷 第1期 页码 56-61
基于概率断裂力学对B级钢货车侧架的圆角细节进行了模拟耐久性试验研究,提出了一种新的通用当量初始缺陷尺寸分布的计算方法,建立了裂纹超越概率模型
Mahboube Ghahramaninezhad, Fatemeh Mohajer, Mahdi Niknam Shahrak
《化学科学与工程前沿(英文)》 2020年 第14卷 第3期 页码 425-435 doi: 10.1007/s11705-019-1873-5
关键词: hard/hard structure acidic hydrogen ZIF-91 carbon capture ZIF-91-OLi
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《医学前沿(英文)》 2017年 第11卷 第4期 页码 590-594 doi: 10.1007/s11684-017-0537-4
Grading of Recommendations Assessment, Development, and Evaluation (GRADE) offers a worldwide approach to guideline development for clinical practice. For the clinical practice of acupuncture therapy, 18 evidence-based guidelines have been developed in China using GRADE. In this study, we review the advantages and limitations of the GRADE approach in the guideline development for acupuncture and moxibustion and propose some solutions to these limitations. Scientific advantages of rating the quality of evidence, outcome-centric direction, overall progression to develop recommendations, and strength of recommendations providing specific clinical guidance are the advantages of GRADE. The limitations of GRADE in the development of guidelines for acupuncture and moxibustion include rating the quality of evidence for ancient literature and literature on famous traditional Chinese medicine experts’ experiences and specific guidelines for formulating recommendations from evidence. In the guideline development for clinical practice with acupuncture and moxibustion, we suggest that a specific method should be explored based on the GRADE approach and the characteristics of acupuncture therapy.
关键词: guideline acupuncture GRADE
Development of combined transitional pavement structure for urban tram track-road grade crossings
《结构与土木工程前沿(英文)》 页码 1199-1210 doi: 10.1007/s11709-023-0949-y
关键词: urban tram track grade crossing combined track-road transitional pavement polyurethane elastic concrete finite element method
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《医学前沿(英文)》 2017年 第11卷 第2期 页码 223-228 doi: 10.1007/s11684-017-0517-8
The objective of this study is to guide a triage for the management of cervical high-grade squamous intraepithelial lesion (HSIL) patients with positive margin by conization. Clinico-pathological data of HSIL patients with positive margin by conization were retrospectively collected from January 2009 to December 2014. All patients underwent secondary conization or hysterectomy within 6 months. The rate of residual lesion was calculated, and the factors associated with residual lesion were analyzed by univariate and multivariate analyses. Among a total of 119 patients, 56 (47.06%) patients presented residual HSIL in their subsequent surgical specimens, including 4 cases of invasive cervical carcinoma (3 stage IA1 and 1 stage IA2 patients). Univariate analysis showed that patient age>35 years (P=0.005), menopausal period>5 years (P=0.0035), and multiple-quadrant involvement (P=0.001) were significantly correlated with residual disease; however, multivariate analysis revealed that multiple-quadrant involvement (P=0.001; OR, 3.701; 95%CI, 1.496–9.154) was an independent risk factor for residual disease. Nearly half of HSIL patients with positive margin by conization were disease-free in subsequent surgical specimens, and those with multiple positive margins may consider re-conization or re-assessment.
关键词: cervical high-grade squamous intraepithelial lesion conization positive surgical margin hysterectomy
Silver-catalyzed bioleaching for raw low-grade copper sulphide ores
Tianlong DENG, Yafei GUO, Mengxia LIAO, Dongchan LI
《化学科学与工程前沿(英文)》 2009年 第3卷 第3期 页码 250-254 doi: 10.1007/s11705-009-0049-0
关键词: green process biohydrometallurgy bioleaching reaction kinetics sulphide ores
邵安林
《中国工程科学》 2014年 第16卷 第2期 页码 68-72
本文以五品联动理论为研究背景,考虑到矿山工程中地质工程、采矿工程、配矿工程、选矿工程和冶炼工程5 个工程是相互联系的串联耦合工程,是矿山企业活动的主体,而与其相对应的地质品位、采出品位、入选品位、精矿品位和入炉品位对于矿山整体经济效益起到关键的控制作用。本文运用并拓展了“质量守恒”原理,利用“矿量守恒”和“金属量守恒”建立了品位经济效益模型,提出了五品联动品位—效益活跃指数,通过实例计算与分析,获得了某铁矿的品位优化数值,为进一步研究矿山企业工程管理模式奠定了基础。
袁国,利成宁,孙丹丹,康健,王国栋
《中国工程科学》 2014年 第16卷 第2期 页码 39-45
介绍了热轧双相钢的发展现状及存在问题,指出低成本热轧双相钢、高延伸凸缘型铁素体+贝氏体热轧双相钢(F-B热轧双相钢)及高强度热轧双相钢的开发及应用,将促进我国热轧双相钢的发展,推动汽车工业的&ldquo同时,探讨了纳米析出强化型热轧双相钢的强化机理及工艺控制原理,并在实验室进行了中试,开发出铁素体基体析出强化型的热轧双相钢,其抗拉强度达770~830 MPa,屈强比<0.75,组织为铁素体+马氏体,且铁素体基体中存在大量细小的纳米级尺寸的
A D POFALE, S P WANJARI
《结构与土木工程前沿(英文)》 2013年 第7卷 第1期 页码 39-45 doi: 10.1007/s11709-013-0193-y
关键词: bond strength Portland Pozzolane Cement (PPC) concrete Ordinary Portland Cement (OPC) concrete bond between concrete and steel pullout test development length
标题 作者 时间 类型 操作
Application of Grading of Recommendations Assessment, Development, and Evaluation (GRADE) to the guideline
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期刊论文
Development of combined transitional pavement structure for urban tram track-road grade crossings
期刊论文
Triage for management of cervical high-grade squamous intraepithelial lesion patients with positive margin
null
期刊论文
Silver-catalyzed bioleaching for raw low-grade copper sulphide ores
Tianlong DENG, Yafei GUO, Mengxia LIAO, Dongchan LI
期刊论文
Study of bond strength between various grade of Ordinary Portland Cement (OPC) and Portland Pozzolane
A D POFALE, S P WANJARI
期刊论文