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700 °C 及以上蒸汽温度下先进USC发电厂用耐热材料的研究和开发 Review
Fujio Abe
《工程(英文)》 2015年 第1卷 第2期 页码 211-224 doi: 10.15302/J-ENG-2015031
欧洲、美国、日本已开展蒸汽温度为700 °C 及以上的先进超超临界(A-USC) 发电厂用材料开发项目,以实现更高能效和低二氧化碳排放量。近年来中国、印度等也开展了上述项目的开发和研究。这些项目涉及采用镍基合金更换马氏体9%~12%Cr 钢以用于最高温度的锅炉和涡轮部件,从而在700 °C 及以上温度下提供充足的蠕变强度。
关键词: 镍基合金 9 %~12 % Cr 钢 蠕变强度 蠕变疲劳性质 焊缝 晶界 显微结构 &gamma &prime M23C6 碳化物
Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG
《能源前沿(英文)》 2016年 第10卷 第1期 页码 88-104 doi: 10.1007/s11708-015-0387-1
关键词: 700°C ultra-super-critical unit steam turbine very high pressure rotor structure strength design strength design criteria finite element analysis
邵建雄,刘景旺,袁达夫
《中国工程科学》 2011年 第13卷 第7期 页码 104-110
分析了三峡水轮发电机组设计中必须考虑的主要问题;总结了所进行的关键技术研究;通过关键技术问题研究,使得三峡水轮发电机组参数达到最优化。机组运行结果表明三峡水轮发电机组性能良好,能够长期安全、稳定、高效运行,从而有效地验证了对三峡巨型水轮发电机组的总体技术设计是科学合理的。
Cooling performance of grid-sheets for highly loaded ultra-supercritical steam turbines
Dieter BOHN , Robert KREWINKEL , Shuqing TIAN ,
《能源前沿(英文)》 2009年 第3卷 第3期 页码 313-320 doi: 10.1007/s11708-009-0036-7
关键词: steam turbines 700& deg C-technology numerical inverstigation cooling
Abrahami, John M. M. de Kok, Herman Terryn, Johannes M. C. Mol
《化学科学与工程前沿(英文)》 2017年 第11卷 第3期 页码 465-482 doi: 10.1007/s11705-017-1641-3
关键词: aluminum Cr(VI)-free surface pre-treatments anodizing adhesive bonding
M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE
《机械工程前沿(英文)》 2014年 第9卷 第4期 页码 402-408 doi: 10.1007/s11465-014-0316-8
The kinematic assumptions upon which the Euler-Bernoulli beam theory is founded allow it to be extended to more advanced analysis. Simple superposition allows for three-dimensional transverse loading. Using alternative constitutive equations can allow for viscoelastic or plastic beam deformation. Euler-Bernoulli beam theory can also be extended to the analysis of curved beams, beam buckling, composite beams and geometrically nonlinear beam deflection. In this study, solving the nonlinear differential equation governing the calculation of the large rotation deviation of the beam (or column) has been discussed. Previously to calculate the rotational deviation of the beam, the assumption is made that the angular deviation of the beam is small. By considering the small slope in the linearization of the governing differential equation, the solving is easy. The result of this simplification in some cases will lead to an excessive error. In this paper nonlinear differential equations governing on this system are solved analytically by Akbari-Ganji’s method (AGM). Moreover, in AGM by solving a set of algebraic equations, complicated nonlinear equations can easily be solved and without any mathematical operations such as integration solving. The solution of the problem can be obtained very simply and easily. Furthermore, to enhance the accuracy of the results, the Taylor expansion is not needed in most cases via AGM manner. Also, comparisons are made between AGM and numerical method (Runge-Kutta 4th). The results reveal that this method is very effective and simple, and can be applied for other nonlinear problems.
关键词: AGM critical load of columns large deformations of beam nonlinear differential equation
Enhancing power transfer capability through flexible AC transmission system devices: a review
Fadi M. ALBATSH,Saad MEKHILEF,Shameem AHMAD,H. MOKHLIS,M. A. HASSAN
《信息与电子工程前沿(英文)》 2015年 第16卷 第8期 页码 658-678 doi: 10.1631/FITEE.1500019
关键词: FACTS devices Available transfer capability Power transfer capability Artificial intelligence
Combined heat and power plant integrated with mobilized thermal energy storage (M-TES) system
M, Erik DAHLQUIST
《能源前沿(英文)》 2010年 第4卷 第4期 页码 469-474 doi: 10.1007/s11708-010-0123-9
关键词: Mobilized thermal energy system district heating thermal energy storage combined heat and power detached houses
Craig M. Schiffries, Andrea Johnson Mangum, Jennifer L. Mays, Michelle Hoon-Starr, Robert M. Hazen
《工程(英文)》 2019年 第5卷 第3期 页码 372-378 doi: 10.1016/j.eng.2019.03.004
ThMn12型永磁合金 Review
Hadjipanayis, A.M. Gabay, A.M. Schönhöbel, A. Martín-Cid, J.M. Barandiaran, D. Niarchos
《工程(英文)》 2020年 第6卷 第2期 页码 140-146 doi: 10.1016/j.eng.2018.12.011
具有四方ThMn12型结构的富铁化合物有潜力满足当下人们对于高磁能积、工作温度为150~200 ℃的贫稀土永磁体的需求。尽管磁体制备技术的发展滞后于相关磁性材料的研究是正常的,但对于ThMn12型磁性材料而言,这种研究进展的差异非常显著。近年来,随着以含少量结构稳定元素(如SmFe11V或Sm0.8Zr0.2Fe9.2Co2.3Ti0.5)或者不含该类元素的材料(如SmFe9.6Co2.4薄膜)为基础所合成的具有优异内禀磁性化合物研究的突破,这一差距进一步扩大。在日益强大的理论计算的帮助下,人们对于理想的化合物的探寻从未停步。遗憾的是,基于聚合物键合填隙改性粉末的磁体的研究仍然处于边缘阶段。人们发现,引入镧(La)可以提高Sm(Fe,Ti)12中少数低熔点相的稳定性,从而首次使得液相烧结成为可能。然而,La金属的高反应活性会明显地破坏材料的矫顽力(Hc)。最初被抑制的ThMn12型相的可控结晶使得“块状”磁硬化成为可能,这不仅在Sm-Fe-V合金中可以实现(自20世纪90年代便为人所知),并且在添加La的(Ce,Sm)(Fe,Ti)12合金中也可以实现。然而,块状硬化所得的合金的性能仍然不能令人满意。机械化学合成的(Sm,Zr)(Fe,Si)12和(Sm,Zr)(Fe,Co,Ti)12粉末可能适合烧结成具有高强度的全致密磁体,尽管在此之前,两者都已开发出较高的各向异性,而后一种合金已开发出较高的矫顽力。
关键词: 永磁体,稀土永磁体,ThMn 12 结构
Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators
Hamid M. SEDIGHI, Hassen M. OUAKAD
《结构与土木工程前沿(英文)》 2020年 第14卷 第6期 页码 1520-1530 doi: 10.1007/s11709-020-0672-x
关键词: velocity gradient elasticity theory nanotube resonators differential-quadrature method nonlinear vibration
RNA m6A modification and its function in diseases
null
《医学前沿(英文)》 2018年 第12卷 第4期 页码 481-489 doi: 10.1007/s11684-018-0654-8
N6-methyladenosine (m6A) is the most common post-transcriptional RNA modification throughout the transcriptome, affecting fundamental aspects of RNA metabolism. m6A modification could be installed by m6A “writers” composed of core catalytic components (METTL3/METTL14/WTAP) and newly defined regulators and removed by m6A “erasers” (FTO and ALKBH5). The function of m6A is executed by m6A “readers” that bind to m6A directly (YTH domain-containing proteins, eIF3 and IGF2BPs) or indirectly (HNRNPA2B1). In the past few years, advances in m6A modulators (“writers,” “erasers,” and “readers”) have remarkably renewed our understanding of the function and regulation of m6A in different cells under normal or disease conditions. However, the mechanism and the regulatory network of m6A are still largely unknown. Moreover, investigations of the m6A physiological roles in human diseases are limited. In this review, we summarize the recent advances in m6A research and highlight the functional relevance and importance of m6A modification in in vitro cell lines, in physiological contexts, and in cancers.
Special issue: Manufacturing engineering management
Shanlin YANG, Panos M. PARDALOS, Xinbao LIU
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 417-419 doi: 10.15302/J-FEM-2018209
An investigation of reaction furnace temperatures and sulfur recovery
ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR
《化学科学与工程前沿(英文)》 2011年 第5卷 第3期 页码 362-371 doi: 10.1007/s11705-011-1106-z
关键词: Claus unit concentration of H2S tail gas ratio sulfur recovery catalytic bed
标题 作者 时间 类型 操作
Structure improvement and strength finite element analysis of VHP welded rotor of 700°C USC steam turbine
Jinyuan SHI,Zhicheng DENG,Yong WANG,Yu YANG
期刊论文
Cooling performance of grid-sheets for highly loaded ultra-supercritical steam turbines
Dieter BOHN , Robert KREWINKEL , Shuqing TIAN ,
期刊论文
Towards Cr(VI)-free anodization of aluminum alloys for aerospace adhesive bonding applications: A review
Abrahami, John M. M. de Kok, Herman Terryn, Johannes M. C. Mol
期刊论文
Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by AGM
M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE
期刊论文
Enhancing power transfer capability through flexible AC transmission system devices: a review
Fadi M. ALBATSH,Saad MEKHILEF,Shameem AHMAD,H. MOKHLIS,M. A. HASSAN
期刊论文
Combined heat and power plant integrated with mobilized thermal energy storage (M-TES) system
M, Erik DAHLQUIST
期刊论文
深碳观测计划——对地球内部碳的十年探索
Craig M. Schiffries, Andrea Johnson Mangum, Jennifer L. Mays, Michelle Hoon-Starr, Robert M. Hazen
期刊论文
ThMn12型永磁合金
Hadjipanayis, A.M. Gabay, A.M. Schönhöbel, A. Martín-Cid, J.M. Barandiaran, D. Niarchos
期刊论文
Velocity gradient elasticity for nonlinear vibration of carbon nanotube resonators
Hamid M. SEDIGHI, Hassen M. OUAKAD
期刊论文
Special issue: Manufacturing engineering management
Shanlin YANG, Panos M. PARDALOS, Xinbao LIU
期刊论文