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SMRs – overview, international developments, safety features and the GRS simulation chain
《能源前沿(英文)》 2021年 第15卷 第4期 页码 793-809 doi: 10.1007/s11708-021-0751-2
关键词: small modular reactors (SMRs) history recent developments safety aspects simulation chain of the Gesellschaft für Anlagen- und Reaktorsicherheit (GRS)
Impact analysis of compressor rotor blades of an aircraft engine
Y B SUDHIR SASTRY, B G KIROS, F HAILU, P R BUDARAPU
《结构与土木工程前沿(英文)》 2019年 第13卷 第3期 页码 505-514 doi: 10.1007/s11709-018-0493-3
关键词: axial flow compressor rotor and stator blades aircraft engine stress and impact analysis aluminum alloys
Influence of harvest date on seed yield and quality in forage kochia
Cody F. CREECH, Blair L. WALDRON, Corey V. RAMSOM, Dale R. ZOBELL, Joseph Earl CREECH
《农业科学与工程前沿(英文)》 2018年 第5卷 第1期 页码 71-79 doi: 10.15302/J-FASE-2017196
Strategies to reduce nutrient pollution from manure management in China
David R. CHADWICK, John R.
《农业科学与工程前沿(英文)》 2020年 第7卷 第1期 页码 45-55 doi: 10.15302/J-FASE-2019293
As the demand for livestock products continues to increase in China, so too does the challenge of managing increasing quantities of manure. Urgent action is needed to control point source (housing, storage and processing) and diffuse (field application) pollution and improve the utilization of manure nutrients and organic matter. Here, we review strategies to improve management at each stage of the manure management chain and at different scales. Many strategies require infrastructure investment, e.g., for containment of all manure fractions. Engineering solutions are needed to develop advanced composting systems with lower environmental footprints and design more efficient nutrient stripping technologies. At the field-scale, there is an urgent need to develop a manure nutrient recommendation system that accounts for the range of manure types, cropping systems, soils and climates throughout China. At the regional scale, coordinated planning is necessary to promote recoupling of livestock and cropping systems, and reduce nutrient accumulation in regions with little available landbank, while minimizing the risk of pollution swapping from one region to another. A range of stakeholders are needed to support the step change and innovation required to improve manure management, reduce reliance on inorganic fertilizers, and generate new business opportunities.
关键词: cropping farms livestock production manure management chain recoupling nutrient loss
Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas
《化学科学与工程前沿(英文)》 2021年 第15卷 第2期 页码 399-409 doi: 10.1007/s11705-020-1934-9
关键词: CFD simulation porous media porous electrode pressure drop redox flow battery
Synthesis of a cardanol-amine derivative using an ionic liquid catalyst
Atanu Biswas, Carlucio R. Alves, Maria T. S. Trevisan, Roseane L. E. da Silva, Roselayne F.
《化学科学与工程前沿(英文)》 2016年 第10卷 第3期 页码 425-431 doi: 10.1007/s11705-016-1581-3
关键词: cardanol epoxidation aminohydrin aniline ionic liquid aniline-formaldehyde
A NEW APPROACH TO HOLISTIC NITROGEN MANAGEMENT IN CHINA
《农业科学与工程前沿(英文)》 2022年 第9卷 第3期 页码 490-510 doi: 10.15302/J-FASE-2022453
● Progress on nitrogen management in agriculture is overviewed in China.
关键词: 4R technology food chain N management N use efficiency soil-crop system sustainable management
Computational simulation methods for fiber reinforced composites
Vladimír KOMPI, Zuzana MURINKOV, Sergey RJASANOW, Richards GRZIBOVSKIS, Qinghua QIN,
《结构与土木工程前沿(英文)》 2010年 第4卷 第3期 页码 396-401 doi: 10.1007/s11709-010-0079-1
关键词: Trefftz-finite element method (Trefftz-FEM) adaptive cross approximation BEM (ACA BEM) method of continuous source functions composite materials short fibers
靳文波,杨继星 ,刘韶菲 ,张云雷 ,肖甜甜
《中国工程科学》 2023年 第25卷 第1期 页码 20-29 doi: 10.15302/J-SSCAE-2023.01.010
近年来我国特大城市暴雨链生灾害频发,严重威胁人民的生命财产安全和社会稳定,采取有效应对措施及时进行断链减灾至关重要。本文深入梳理暴雨链生灾害体系,研究当前内涝灾害趋势推演模型以及各类推演模拟成果在灾害链阻断过程中的重要作用,提出模拟推演与综合响应相结合的断链思路,明确各类应急主体在特大城市巨灾应对过程中的响应策略。同时,提出以“预案”“监测”“推演”“协同”“救援”为基础的特大城市暴雨链生灾害总体应对思路,针对突发灾害场景下的多部门预案协同、多维度信息汇聚、多层级精准预警、多队伍联动调度等关键问题提出了完备综合预案体系、构建监测预警网络、提升模拟推演应用、强化联合响应能力、夯实精准救援能力五方面应对方法。并在政策法规制定、标准编制、智慧化技术应用、智能预警与定向发布技术的推广、“全民应急”新格局的形成方面提出了发展建议。
FAJARDO,Alvaro R. CUJI,Jaime A. GARCÍA,Luis E. GARZÓN,Luis M. LÓPEZ
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 287-293 doi: 10.1007/s11465-015-0346-x
A polymeric natural fiber-reinforced composite is developed by extrusion and injection molding process. The shrinkage and warpage of high-density polyethylene reinforced with short natural fibers of Guadua angustifolia Kunth are analyzed by experimental measurements and computer simulations. Autodesk Moldflow® and Solid Works® are employed to simulate both volumetric shrinkage and warpage of injected parts at different configurations: 0 wt.%, 20 wt.%, 30 wt.% and 40 wt.% reinforcing on shrinkage and warpage behavior of polymer composite. Become evident the restrictive effect of reinforcing on the volumetric shrinkage and warpage of injected parts. The results indicate that volumetric shrinkage of natural composite is reduced up to 58% with fiber increasing, whereas the warpage shows a reduction form 79% to 86% with major fiber content. These results suggest that it is a highly beneficial use of natural fibers to improve the assembly properties of polymeric natural fiber-reinforced composites.
关键词: biocomposite natural fiber shrinkage simulation warpage
Lin ZHANG, Yan SUN
《化学科学与工程前沿(英文)》 2013年 第7卷 第4期 页码 456-463 doi: 10.1007/s11705-013-1357-y
关键词: adsorption desorption irreversibility protein conformational transition molecular dynamics simulation
郭小红,王梦恕
《中国工程科学》 2011年 第13卷 第9期 页码 38-41
以厦门翔安海底隧道涌水量最大、施工难度最大的海域段F1风化槽为研究对象,根据其围岩地质条件和突涌水特点,采用全断面注浆加固和堵水,注浆加固范围为掌子面内及隧道开挖轮廓线外施工期现场监控量测与数值计算结果表明:F1风化深槽围岩注浆加固效果均较为理想,未发生涌水突泥,达到了设计的技术要求。该项研究成果为今后开展类似工程的注浆加固提供了技术借鉴。
FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA
《农业科学与工程前沿(英文)》 2023年 第10卷 第4期 页码 593-606 doi: 10.15302/J-FASE-2023522
Ensuring food safety while reducing agricultural non-point source pollution is quite challenging, especially in developing and underdeveloped countries. Effective systematic strategies and comprehensive technologies need to be developed for agricultural non-point source pollution control at the watershed scale to improve surface water quality. In this review, a proposal is made for a full time-space governance strategy that prioritizes source management followed by endpoint water pollution control. The 4R chain technology system is specifically reviewed, including source reduction, process retention, nutrient reuse and water restoration. The 4R chain technology system with the full time-space governance strategy was applied at the scale of an administrative village and proved to be a feasible solution for reducing agricultural non-point source pollution in China. In the future, a monitoring system needs to be established to trace N and P transport. Additionally, new smart fertilizer and intelligent equipment need to be developed, and relevant governance standards and supportive policies need to be set to enhance the efficacy of agricultural non-point source pollution control.
关键词: 4R chain technology system agricultural non-point source pollution case study full time-space governance strategy
徐志磊
《中国工程科学》 2002年 第4卷 第10期 页码 26-30
核武器是特殊的复杂系统,对使用有效性、安全性、可靠性有特殊的要求,核武器的工程研制是以科学为基础的方法进行的,强调基础应用研究,加强系统研究和计算机数值模拟。对复杂系统环境适应能力的力学和材料科学的数值模拟是重要的发展方向,数值模拟的关键建模和试验设计,目前对复杂系统还没有普适的建模理论,21世纪科学的发展,必将在各种学科领域中加快数值模拟的应用。
Development of soft kernel durum wheat
Craig F. MORRIS
《农业科学与工程前沿(英文)》 2019年 第6卷 第3期 页码 273-278 doi: 10.15302/J-FASE-2019259
Kernel texture (grain hardness) is a fundamental and determining factor related to wheat ( spp.) milling, baking and flour utilization. There are three kernel texture classes in wheat: soft and hard hexaploid ( ), and very hard durum ( subsp. ). The genetic basis for these three classes lies with the Puroindoline genes. Phenotypically, the easiest means of quantifying kernel texture is with the Single Kernel Characterization System (SKCS), although other means are valid and can provide fundamental material properties. Typical SKCS values for soft wheat would be around 25 and for durum wheat≥80. Soft kernel durum wheat was created via homeologous recombination using the mutation, which facilitated the transfer of ca. 28 Mbp of 5DS that replaced ca. 21 Mbp of 5BS. The 5DS translocation contained a complete and intact locus and both puroindoline genes. Expression of the puroindoline genes in durum grain resulted in kernel texture and flour milling characteristics nearly identical to that of soft wheat, with high yields of break and straight-grade flours, which had small particle size and low starch damage. Dough water absorption was markedly reduced compared to durum flour and semolina. Dough was essentially unchanged and reflected the inherent gluten properties of the durum background. Pasta quality was essentially equal-to-or-better than pasta made from semolina. Agronomically, soft durum germplasm showed good potential with moderate grain yield and resistance to a number of fungal pathogens and insects. Future breeding efforts will no doubt further improve the quality and competitiveness of soft durum cultivars.
关键词: soft durum wheat grain hardness puroindolines milling baking pasta noodles
标题 作者 时间 类型 操作
Impact analysis of compressor rotor blades of an aircraft engine
Y B SUDHIR SASTRY, B G KIROS, F HAILU, P R BUDARAPU
期刊论文
Influence of harvest date on seed yield and quality in forage kochia
Cody F. CREECH, Blair L. WALDRON, Corey V. RAMSOM, Dale R. ZOBELL, Joseph Earl CREECH
期刊论文
Strategies to reduce nutrient pollution from manure management in China
David R. CHADWICK, John R.
期刊论文
Pressure drop analysis on the positive half-cell of a cerium redox flow battery using computational fluid dynamics: Mathematical and modelling aspects of porous media
Fernando F. Rivera, Berenice Miranda-Alcántara, Germán Orozco, Carlos Ponce de León, Luis F. Arenas
期刊论文
Synthesis of a cardanol-amine derivative using an ionic liquid catalyst
Atanu Biswas, Carlucio R. Alves, Maria T. S. Trevisan, Roseane L. E. da Silva, Roselayne F.
期刊论文
Computational simulation methods for fiber reinforced composites
Vladimír KOMPI, Zuzana MURINKOV, Sergey RJASANOW, Richards GRZIBOVSKIS, Qinghua QIN,
期刊论文
Experimental evaluation and simulation of volumetric shrinkage and warpage on polymeric composite short
FAJARDO,Alvaro R. CUJI,Jaime A. GARCÍA,Luis E. GARZÓN,Luis M. LÓPEZ
期刊论文
Effect of ligand chain length on hydrophobic charge induction chromatography revealed by molecular dynamics
Lin ZHANG, Yan SUN
期刊论文
FULL TIME-SPACE GOVERNANCE STRATEGY AND TECHNOLOGY FOR CROPLAND NON-POINT POLLUTION CONTROL IN CHINA
期刊论文