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Antibiotic resistance genes in manure-amended paddy soils across eastern China: Occurrence and influencing

《环境科学与工程前沿（英文）》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1499-y

摘要：

• Manure fertilization resulted in antibiotic residues and increased metal contents.

关键词： Pig manure     Antibiotics     Metals     Antibiotic resistance genes     Paddy fields    

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Iron oxidation-reduction and its impacts on cadmium bioavailability in paddy soils: a review

Chunhua ZHANG, Ying GE, Huan YAO, Xiao CHEN, Minkun HU

《环境科学与工程前沿（英文）》 2012年 第6卷 第4期   页码 509-517 doi: 10.1007/s11783-012-0394-y

摘要： Redox conditions in paddy soils may vary as they are submerged and drained during rice growth. This change may bring about reductive dissolution of iron (Fe) oxides and subsequent formation of secondary Fe-bearing minerals in rice paddies. The mobility and bioavailability of metal contaminants such as cadmium (Cd) in paddy soils are closely related to the chemical behaviors of Fe. Therefore, in this paper, advances in the study of paddy Fe redox transformations and their effects on Cd availability to rice are briefly reviewed. Current concepts presented in this review include the forms of Fe in paddy soils, the reactions involved in Fe oxidation-reduction, chemical factors affecting Fe redox processes, Cd availability to rice and the impacts of Fe transformation on Cd uptake and translocation in rice. Prospects for future research in this area are also discussed.

关键词： paddy soil     redox     iron     cadmium     bioavailability     rice    

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Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

《结构与土木工程前沿（英文）》 2015年 第9卷 第2期   页码 114-120 doi: 10.1007/s11709-014-0267-5

摘要： The accurate and efficient simulation of random heterogeneous media is important in the framework of modeling and design of complex materials across multiple length scales. It is usually assumed that the morphology of a random microstructure can be described as a non-Gaussian random field that is completely defined by its multivariate distribution. A particular kind of non-Gaussian random fields with great practical importance is that of translation fields resulting from a simple memory-less transformation of an underlying Gaussian field with known second-order statistics. This paper provides a critical examination of existing random field models of heterogeneous two-phase media with emphasis on level-cut random fields which are a special case of translation fields. The case of random level sets, often used to represent the geometry of physical systems, is also examined. Two numerical examples are provided to illustrate the basic features of the different approaches.

关键词： microstructure     random fields     level sets     shape recovery     two-phase media    

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NITROGEN USE AND MANAGEMENT IN ORCHARDS AND VEGETABLE FIELDS IN CHINA: CHALLENGES AND SOLUTIONS

《农业科学与工程前沿（英文）》 2022年 第9卷 第3期   页码 386-395 doi: 10.15302/J-FASE-2022443

摘要：

● Excessive application of N fertilizers in orchards and vegetable fields (OVFs) in China is particularly common.

关键词： nitrogen fate     nitrogen fertilizer     orchards     vegetable fields    

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Advanced biomass materials: progress in the applications for energy, environmental, and emerging fields

《化学科学与工程前沿（英文）》 2023年 第17卷 第7期   页码 795-797 doi: 10.1007/s11705-023-2336-6

摘要： Advanced biomass materials: progress in the applications for energy, environmental, and emerging fields

关键词： progress applications energy     fields    

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Engineering Fronts in fields of Energy and Electrical Science and Technologies in the report of

《能源前沿（英文）》 2023年 第17卷 第1期   页码 5-8 doi: 10.1007/s11708-023-0868-6

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The perturbed magnetic fields caused by mechanical stress

QIN Fei, YAN Dong-mei

《机械工程前沿（英文）》 2006年 第1卷 第2期   页码 151-156 doi: 10.1007/s11465-006-0015-1

摘要： In the framework of the linearized magnetoelastic theory, the perturbed magnetic fields caused by mechanical stress and deformation were investigated theoretically. Governing equations and boundary conditions to determine the perturbed fields were derived. The effect of mechanical deformation on the magnetic fields was taken into account by coupling structural displacement into the perturbed magnetic field continuous conditions on the boundary of the structure. As an example, the perturbed field of a half-plane magnetized structure caused by a point force was calculated by the Fourier transform method. The results show that the calculated magnetic intensity component normal to the boundary of the structure reaches its maximum at the point force acted while the component tangent to the boundary inverses its direction sharply. The magnetic induction of the perturbed field is proportional to the applied force. Magnitude analysis proved that since the applied magnetic field has a relative weak intensity such as the Earth s magnetic field, influence of the magnetic field on deformation of the structure can be neglected.
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Stem cell niches and endogenous electric fields in tissue repair

null

《医学前沿（英文）》 2011年 第5卷 第1期   页码 40-44 doi: 10.1007/s11684-011-0108-z

摘要：

Adult stem cells are responsible for homeostasis and repair of many tissues. Endogenous adult stem cells reside in certain regions of organs, known as the stem cell niche, which is recognized to have an important role in regulating tissue maintenance and repair. In wound healing and tissue repair, stem cells are mobilized and recruited to the site of wound, and participate in the repair process. Many regulatory factors are involved in the stem cell-based repair process, including stem cell niches and endogenous wound electric fields, which are present at wound tissues and proved to be important in guiding wound healing. Here we briefly review the role of stem cell niches and endogenous electric fields in tissue repair, and hypothesize that endogenous electric fields become part of stem cell niche in the wound site.

关键词： stem cell     stem cell niche     electric field     tissue repair    

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Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale

Bruno SUDRET,Hung Xuan DANG,Marc BERVEILLER,Asmahana ZEGHADI,Thierry YALAMAS

《结构与土木工程前沿（英文）》 2015年 第9卷 第2期   页码 121-140 doi: 10.1007/s11709-015-0290-1

摘要： The spatial variability of stress fields resulting from polycrystalline aggregate calculations involving random grain geometry and crystal orientations is investigated. A periodogram-based method is proposed to identify the properties of homogeneous Gaussian random fields (power spectral density and related covariance structure). Based on a set of finite element polycrystalline aggregate calculations the properties of the maximal principal stress field are identified. Two cases are considered, using either a fixed or random grain geometry. The stability of the method w.r.t the number of samples and the load level (up to 3.5% macroscopic deformation) is investigated.

关键词： polycrystalline aggregates     crystal plasticity     random fields     spatial variability     correlation structure    

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Extrapolation reconstruction of wind pressure fields on the claddings of high-rise buildings

Yehua SUN, Guquan SONG, Hui LV

《结构与土木工程前沿（英文）》 2019年 第13卷 第3期   页码 653-666 doi: 10.1007/s11709-018-0503-5

摘要： Recent research about reconstruction methods mainly used the interpolation reconstruction of the fluctuating wind pressure field on the surface. However, to investigate wind pressure at the edge of the building, the work presented in this paper focuses on the extrapolation reconstruction of wind pressure fields. Here, we propose an improved proper orthogonal decomposition (POD) and Kriging method with a von Kármán correlation function to resolve this issue. The studies show that it works well for not only interpolation reconstruction but also extrapolation reconstruction. The proposed method does require determination of the Hurst exponent and other parameters analysed from the original data. Hence, the fluctuating wind fields have been characterized by the von Kármán correlation function, as an a priori function. Compared with the cubic spline method and different variogram, preliminary results suggest less time consumption and high efficiency in extrapolation reconstruction at the edge.

关键词： extrapolation reconstruction     proper orthogonal decomposition     Kriging method     von Kármán function     Hurst exponent     rescaled range analysis    

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SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

《农业科学与工程前沿（英文）》 2023年 第10卷 第2期   页码 248-261 doi: 10.15302/J-FASE-2023499

摘要：

● Establishment of a rapid tool for monitoring soil carbon sequestration in farmer fields.

关键词： 4 per 1000 initiative     carbon sequestration     climate action     farmer fields     SDG13     soil organic carbon     soil testing    

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化工、冶金与材料领域颠覆性技术影响初探

“化工、冶金与材料领域”课题组

《中国工程科学》 2018年 第20卷 第6期   页码 34-41 doi: 10.15302/J-SSCAE-2018.06.006

摘要：

化工、冶金与材料工业通过获取自然资源进行再加工，生产人类生活所必需的材料、化学品和二次能源，为人类社会发展和国民经济建设提供了重要的物质基础。本文梳理了化工、冶金与材料领域历史上曾产生过的、公认的具有颠覆性意义的技术，分析了这类技术对人们日常生活、人类社会文明进步的影响和对传统技术的颠覆。并根据愿景驱动、问题导向和世界技术发展趋势，对化工、冶金与材料领域未来高效、安全、节能环保的可持续性科学发展模式，以及有望产生的颠覆性技术对国计民生的影响进行了展望，提出了浆态床渣油加氢转化技术、冶金制造流程功能拓展技术、石墨烯等具有颠覆性意义的技术。最后针对颠覆性技术的培育、发展和所需营造的环境提出了相关政策与建议。

关键词： 化工     冶金     材料     颠覆性技术     国计民生    

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中国油气田开发现状、面临的挑战和技术发展方向

韩大匡

《中国工程科学》 2010年 第12卷 第5期   页码 51-57

摘要：

回顾了我国油气田开发所走过的不平凡光辉历程，简要叙述了我国油气田的储层地质特点、主要类型和已形成的技术系列，揭示了近年来所面临的严峻挑战，比较详细地阐述了应对这些挑战的技术对策和开发好高含水、低渗透、稠油、海洋等主要类型油田和各种复杂气田的技术发展方向。

关键词： 中国油气田开发     技术系列     高含水油田     低渗透油田     稠油油田     海洋油田     复杂气田     技术发展方向    

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230 kA铝电解槽物理场测试分析与技术条件优化

华桂林,曾凡炯,李俊,邵勇,李来宝

《中国工程科学》 2012年 第14卷 第2期   页码 69-79

摘要：

通过铝电解槽物理场的综合测试，系统地给出电解槽的各区域能量损失、槽内磁感应强度的分布及流速分布，对铝电解槽的工艺技术条件合理性以及运行工况进行定量分析和科学评价，为提高铝电解主要技术经济指标，采取有针对性的技改措施提供科学依据。经过工艺技术条件的优化，实现最佳操作路线，有效提升了电解槽技术经济指标及综合效益。

关键词： 铝电解     电解槽     物理场     技术优化    

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Analysis of mobilization of inorganic ions in soil by electrokinetic remediation

Xiaojing LI, Lige WANG, Xueming SUN, Yuansheng CONG

《结构与土木工程前沿（英文）》 2019年 第13卷 第6期   页码 1463-1473 doi: 10.1007/s11709-019-0569-8

摘要： Saline soil has imposed a serious threat on many expressway engineering and agricultural areas. This paper describes the performance of saline soil treatment using electrokinetic remediation technology. Comparison study involving sample soil and soil is carried out. Two different electric fields, i.e., uniform and non-uniform are utilized to promote the migration of inorganic ions contained in the soil toward the electrode area. The effects of different electric field types and potential gradient ion migration rate in soil are investigated. The test result reveals that a uniform electric field of a constant potential gradient of 1 V/cm drives the Cl through the sample soil at a rate of 1.36 cm/h. Moreover, larger potential gradients could make ions migrate faster, but more electrical energy is consumed in such a way. Compared with uniform electric field, the non-uniform process maintains the soil pH values more effectively and consumes less electrical energy. A desirable result of removing Na in soil is expected using electrokinetic remediation technology under four-times scaling up of soil volume.

关键词： electromigration     electric fields     saline soil     soil-remediation    

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标题 作者 时间 类型 操作

Antibiotic resistance genes in manure-amended paddy soils across eastern China: Occurrence and influencing

期刊论文

Iron oxidation-reduction and its impacts on cadmium bioavailability in paddy soils: a review

Chunhua ZHANG, Ying GE, Huan YAO, Xiao CHEN, Minkun HU

期刊论文

Simulation of heterogeneous two-phase media using random fields and level sets

George STEFANOU

期刊论文

NITROGEN USE AND MANAGEMENT IN ORCHARDS AND VEGETABLE FIELDS IN CHINA: CHALLENGES AND SOLUTIONS

期刊论文

Advanced biomass materials: progress in the applications for energy, environmental, and emerging fields

期刊论文

Engineering Fronts in fields of Energy and Electrical Science and Technologies in the report of

期刊论文

The perturbed magnetic fields caused by mechanical stress

QIN Fei, YAN Dong-mei

期刊论文

Stem cell niches and endogenous electric fields in tissue repair

null

期刊论文

Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale

Bruno SUDRET,Hung Xuan DANG,Marc BERVEILLER,Asmahana ZEGHADI,Thierry YALAMAS

期刊论文

Extrapolation reconstruction of wind pressure fields on the claddings of high-rise buildings

Yehua SUN, Guquan SONG, Hui LV

期刊论文

SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

期刊论文

化工、冶金与材料领域颠覆性技术影响初探

“化工、冶金与材料领域”课题组

期刊论文

中国油气田开发现状、面临的挑战和技术发展方向

韩大匡

期刊论文

230 kA铝电解槽物理场测试分析与技术条件优化

华桂林,曾凡炯,李俊,邵勇,李来宝

期刊论文

Analysis of mobilization of inorganic ions in soil by electrokinetic remediation

Xiaojing LI, Lige WANG, Xueming SUN, Yuansheng CONG

期刊论文