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Coupled solid-fluid FE-analysis of an embankment dam

Michael PERTL, Matthias HOFMANN, Guenter HOFSTETTER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1, Pages 53-62 doi: 10.1007/s11709-010-0084-4

Abstract: For the BBM, a computationally efficient return mapping algorithm is proposed, which only requires the

Keywords： multi-phase model unsaturated soil model Barcelona Basic model (BBM) return mapping algorithm embankment

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Financing climate-resilient infrastructure: Determining risk, reward, and return on investment

Peter B. MEYER, Reimund SCHWARZE

Frontiers of Engineering Management 2019, Volume 6, Issue 1, Pages 117-127 doi: 10.1007/s42524-019-0009-4

Abstract:

Urban infrastructure investment is needed for both, mitigation of climate risks and improved urban resiliency. Financing them requires the translation of those benefits into measurable returns on investment in the context of emerging risks that capital markets can understand and appreciate. This paper develops a generic framework to identify what are the necessary and sufficient factors to economically favor climate-change resilient infrastructure in private investment decisions. We specifically demonstrate that carbon pricing alone will not generate the needed will, because market prices at present systematically fail to account for climate change risks such as the costs of stranded assets and the national and local co-benefits of investments in climate resiliency. Carbon pricing is necessary, but not sufficient for an enhanced private financing of climate-resilient infrastructure. The Paris Agreement and other supra-local policies and actors including city networks can concretely help to generate the sufficient social and political will for investments into climate change mitigation and resiliency at the city level.

Keywords： infrastructure urban finance climate low carbon economy

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Land use/cover change effects on floods with different return periods: a case study of Beijing, China

Yueling WANG, Xiaoliu YANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 5, Pages 769-776 doi: 10.1007/s11783-013-0542-z

Abstract: The study took Beijing as an example and analyzed five specific floods with return periods of 20-yearunprecedented LUCC; 2) LUCC can affect inundation extent and flood arrival time, and floods with longer returnperiods are more influenced; 3) LUCC can affect maximum water depth and floods with shorter return periods

Keywords： inundation extent flood arrival time maximum water depth shallow flow model

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Chemical mapping of cement pastes by using confocal Raman spectroscopy

Fengjuan LIU,Zhihui SUN

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2, Pages 168-173 doi: 10.1007/s11709-015-0323-9

Abstract: In the present study, chemical mapping on the hydration process of cement paste with water-to-cementIt is concluded from the study that chemical mapping was an effective method to assist in visualizing

Keywords： chemical mapping Raman spectroscopy calcium silicates calcium hydroxide ettringite

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Independent continuous and mapping method of structural topology optimization based on the global stress

Yunkang SUI, Jili FENG, Hongling YE, Xirong PENG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2, Pages 130-142 doi: 10.1007/s11465-010-0011-3

Abstract: four measures are adopted. 1) Topology optimization model is established by independent continuous mapping

Keywords： independent continuous mapping (ICM) method global stresses constraints topology optimization continuum

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A survey of photon mapping state-of-the-art research and future challenges

Chun-meng KANG,Lu WAN,Yan-ning XU,Xiang-xu MENG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 3, Pages 185-199 doi: 10.1631/FITEE.1500251

Abstract: The photon mapping algorithm is an effective method for computing global illumination with its obviousThe deficiency of precise details and efficient rendering are still the main challenges of photon mappingof categories including radiance estimation, photon relaxation, photon tracing, progressive photon mappingThe goals of our report are giving readers an overall introduction to photon mapping and motivating further

Keywords： Global illumination Photon mapping Radiance estimation Photon relaxation Progressive photon mapping

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and future research directions for the phytoremediation of heavy metal-contaminated soil: A knowledge mapping

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1507-2

Abstract:

• The overall global perspective of the PHMCS field was obtained.

Keywords： Heavy metal-contaminated soil Hot topics Knowledge mapping analysis Knowledge base Phytoremediation

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Impact of Polarization Mode Dispersion on High-Speed Optical Codes

Rao Min,Sun Xiaohan,Zhang Mingde

Strategic Study of CAE 2002, Volume 4, Issue 11, Pages 67-70

Abstract: The statistical behavior of PMD is considered by simulating the nonreturn-to-zero (NRZ) and return-to-zero

Keywords： polarization mode dispersion (PMD) non-return-to-zero (NRZ) return-to-zero (RZ) frequency chirp

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Economic Analysis of Residential Distributed Solar Photovoltaic

Xi Luo,Jia-ping Liu

Frontiers of Engineering Management 2015, Volume 2, Issue 2, Pages 125-130 doi: 10.15302/J-FEM-2015031

Abstract: Under the huge challenges of global energy conservation, emission reduction and energy security, distributed solar photovoltaic industry has become the key means to achieve economic restructuring and low carbon economy. Based on System Advisor Model software, the authors choose Baoji as the sample plot. Household load, unit investment, loan interest rate and loan fraction are used as influence factors to analyze the economic benefits of distributed solar photovoltaic in China. The result demonstrates that government incentives help to increase the profitability of distributed solar photovoltaic by a large extent; other factors that influence the profitability includes household load, unit investment cost, loan interest rate and loan fraction.

Keywords： distributed solar photovoltaic internal rate of return price ladder government incentives

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Electromagnetic induction mapping at varied soil moisture reveals field-scale soil textural patterns

Hiruy ABDU, David A. ROBINSON, Janis BOETTINGER, Scott B. JONES

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2, Pages 135-145 doi: 10.15302/J-FASE-2017143

Abstract: Our objective was to employ electromagnetic induction (EMI) mapping in low apparent electrical conductivity

Keywords： soil electrical conductivity soil texture mapping temporal stability analysis

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Quantifying and mapping spatial variability of Shanghai household carbon footprints

Shangguang YANG,Chunlan WANG,Kevin LO,Mark WANG,Lin LIU

Frontiers in Energy 2015, Volume 9, Issue 1, Pages 115-124 doi: 10.1007/s11708-015-0348-8

Abstract: Understanding the spatial variability of household carbon emissions is necessary for formulating sustainable and low-carbon energy policy. However, data on household carbon emissions is limited in China, the world’s largest greenhouse gases emitter. This study quantifies and maps household carbon emissions in Shanghai using a city-wide household survey. The findings reveal substantial spatial variability in household carbon emissions, especially in transport-related emissions. Low emission clusters are founded in Hongkou, Xuhui, Luwan, Jinshan, and Fengxian. High emission clusters are located in Jiading and Pudong. Overall, the spatial pattern of household carbon emissions in Shanghai is donut-shaped: lowest in the urban core, increasing in the surrounding suburban areas, and declining again in the urban fringe and rural regions. The household emissions are correlated with a number of housing and socioeconomic factors, including car ownership, type of dwelling, size of dwelling, age of dwelling, and income. The findings underscore the importance of a localized approach to low-carbon policy-making and implementation.

Keywords： household carbon emissions spatial variability energy policy Shanghai China

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Management innovation of Chang’e-5 project

Frontiers of Engineering Management 2021, Volume 8, Issue 4, Pages 620-626 doi: 10.1007/s42524-021-0165-1

Keywords： lunar exploration sample return systems engineering project management

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Mapping the structure-activity relationship of

Worawan PANPIPAT, Hasene KESKIN, Zheng GUO

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 1, Pages 105-113 doi: 10.1007/s11705-015-1502-x

Abstract: The phase behavior of twelve synthesized -sitosteryl fatty acid esters with acyl moieties with different chain lengths (C2:0-C18:0) and different degrees of unsaturation (C18:1-C18:3) were investigated in pure and mixed Langmuir monolayers with phospholipids. The surface-pressure isotherms showed that short chain -sitosteryl fatty acid esters gave smaller mean molecular areas and had decreased monolayer stability and the long chain steryl esters did not produce collapsed plateaus. All the steryl esters displayed strong condensing effects, but there was a pronounced structural dependency: medium chain esters (C8 and C10) were less efficient than short and long chain esters. Atomic force microscopy imaging demonstrated that monolayers mixed with dipalmitoyl phosphatidylcholine (DPPC) displayed both DPPC-rich and steryl lipid-rich domains. However, the height and area differences between the two phases and the roughness and morphologic patterns were very dependent on the steryl lipid concentrations as well as the length, the degree of unsaturation and the molecular conformations of the acyl segments. These findings not only provide a better understanding of the interactions between phytosteryl hydrophobic derivatives and biomembranes, but also may be of general use for the design and engineering of phytosterol structural derivations for specific food and pharmaceutical applications.

Keywords： β-sitosteryl fatty acid esters dipalmitoyl phosphatidylcholine Langmuir monolayer condensing effect structure-activity relationship

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Mapping the trends and prospects of battery cathode materials based on patent landscape

Frontiers in Energy Pages 822-832 doi: 10.1007/s11708-023-0900-x

Abstract: Advancing portable electronics and electric vehicles is heavily dependent on the cutting-edge lithium-ion (Li-ion) battery technology, which is closely linked to the properties of cathode materials. Identifying trends and prospects of cathode materials based on patent analysis is considered a kernel to optimize and refine battery related markets. In this paper, a patent analysis is performed on 6 popular cathode materials by comprehensively considering performance comparison, development trend, annual installed capacity, technology life cycle, and distribution among regions and patent assignees. In the technology life cycle, the cathode materials majorly used in electric vehicle have entered maturity stage, while the lithium cobalt oxide (LCO) cathode that is widely used in portable electronics is still in the growth stage. In global patent distributions, China holds more than 50% of total patents. In the top 10 patent assignees of 6 cathode materials, 2 institutes are from China with the rest being Japan (6) and Republic of Korea (2), indicating that the technology of cathode materials in China is relatively scattered while cathode research is highly concentrated in Japan and Republic of Korea. Moreover, the patent distribution has to consider practical issues as well as the impacts of core patents. For example, the high cost discourages the intention of applying international patents. This paper is expected to stimulate battery research, understand technical layout of various countries, and probably forecast innovative technology breakthroughs.

Keywords： patent analysis cathode batteries technology life cycle

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Consolidating and Expanding the Achievements of Poverty Alleviation in the New Stage: Challenges and Policy Recommendations

Cheng Guoqiang, Deng Xiuxin

Strategic Study of CAE 2021, Volume 23, Issue 5, Pages 148-156 doi: 10.15302/J-SSCAE-2021.05.019

Abstract:

Forestalling a large-scale reemergence of poverty is a basic task in the 14th Five-Year Plan period, which entails consolidating and expanding the achievements in poverty alleviation. This means we should manage the risks of people returning to poverty and enhance tiered and targeted assistance of various types to low-income residents, striving for a robust long-term mechanism of poverty reduction. In this paper, we first analyze the main challenges faced by consolidating and expanding the achievements of the battle against poverty in the new development stage. Among others, populations that have been lifted out of poverty falling back into it is complicated in causes, and industries in rural areas are short of sustainable development capacity. Other challenges remain, such as deficient rural medical services, drinking water safety in areas that have shaken off poverty, and outdated rural governance that is out of tune with the new situation. Subsequently, we summarize the basic logic of consolidating and expanding the achievements in poverty alleviation. We put forward three key tasks concerning increasing the institutional supply, relieving resources and environmental constraints, and stimulating endogenous impetus for those who have been lifted out of poverty. Lastly, we propose policy suggestions on consolidating and expanding the achievements in poverty alleviation from five aspects, including building an identification mechanism of low-income rural residents, promoting the performance of rural industries, improving governance capacity in rural areas, conducting rural doctors training programs, and ensuring drinking water safety.

Keywords： return to poverty low-income rural residents rural revitalization poverty alleviation industry poverty