Philosophical transactions. Series A, Mathematical, physical, and engineering sciences最新文献_第10页

Remarks on anomalous dissipation for passive scalars. 无源标量的反常耗散。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-03-07 Epub Date: 2022-01-17 DOI: 10.1098/rsta.2021.0099

A L Mazzucato

引用次数: 1

Editorial: Scaling the Turbulence Edifice. 社论:攀登湍流大厦。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-03-07 Epub Date: 2022-01-17 DOI: 10.1098/rsta.2021.0101

Jérémie Bec, Giorgio Krstulovic, Takeshi Matsumoto, Samriddhi Sankar Ray, Dario Vincenzi

引用次数: 0

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-03-07 Epub Date: 2022-01-17 DOI: 10.1098/rsta.2021.0074

Roberto Benzi, Ilaria Castaldi, Federico Toschi, Jeannot Trampert

{"title":"Self-similar properties of avalanche statistics in a simple turbulent model.","authors":"Roberto Benzi, Ilaria Castaldi, Federico Toschi, Jeannot Trampert","doi":"10.1098/rsta.2021.0074","DOIUrl":"https://doi.org/10.1098/rsta.2021.0074","url":null,"abstract":"<p><p>In this paper, we consider a simplified model of turbulence for large Reynolds numbers driven by a constant power energy input on large scales. In the statistical stationary regime, the behaviour of the kinetic energy is characterized by two well-defined phases: a laminar phase where the kinetic energy grows linearly for a (random) time [Formula: see text] followed by abrupt avalanche-like energy drops of sizes [Formula: see text] due to strong intermittent fluctuations of energy dissipation. We study the probability distribution [Formula: see text] and [Formula: see text] which both exhibit a quite well-defined scaling behaviour. Although [Formula: see text] and [Formula: see text] are not statistically correlated, we suggest and numerically checked that their scaling properties are related based on a simple, but non-trivial, scaling argument. We propose that the same approach can be used for other systems showing avalanche-like behaviour such as amorphous solids and seismic events. This article is part of the theme issue 'Scaling the turbulence edifice (part 1)'.</p>","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":" ","pages":"20210074"},"PeriodicalIF":5.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39938039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Hidden scale invariance in Navier-Stokes intermittency. Navier-Stokes间断性中的隐尺度不变性。

IF 5

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-03-07 Epub Date: 2022-01-17 DOI: 10.1098/rsta.2021.0098

Alexei A Mailybaev, Simon Thalabard

引用次数: 9

Preface to ‘Developing resilient energy systems’ “发展弹性能源系统”前言

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-02-28 DOI: 10.1098/rsta.2021.0131

C. Catlow, L. Henry, C. Ngila, M. Taylor

{"title":"Preface to ‘Developing resilient energy systems’","authors":"C. Catlow, L. Henry, C. Ngila, M. Taylor","doi":"10.1098/rsta.2021.0131","DOIUrl":"https://doi.org/10.1098/rsta.2021.0131","url":null,"abstract":"The need for resilience and sustainability in the systems on which Society depends is increasingly recognized as a global priority. It is also clear that to achieve resilience, input from science, technology and innovation will be essential. For this reason, the Royal Society in partnership with the African Academy of Sciences chose Science for a Resilient Future as the theme for the third Commonwealth Science Conference, which was held virtually in February 2021 and brought together 350 scientists (of whom 270 were early career) from 32 Commonwealth nations to discuss three key areas within the overall theme of science for resilience: Developing resilient energy systems; Nurturing resilient ecosystems; and Building resilient societal systems. The present volume, which comprises papers from participants at the conference, focuses primarily on the first theme, although with some discussion of topics relevant to the third. The second theme will be addressed in a separate volume of Philosophical Transactions B. The development of resilient energy systems is essential for the control of climate change and in many parts of the world a necessary adaptation strategy. It is also critical for the development of sustainable and circular modes of production and consumption. As well as wide ranging scientific and technological challenges, including those relating to behavioural and social aspects, there is a complex interplay between science and policy; and both scientific and policy aspects are illustrated by several of the papers in this volume. The issues raised are, of course,","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124315540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stress-testing development pathways under a changing climate: water-energy-food security in the lake Malawi-Shire river system 气候变化下的压力测试发展路径:马拉维湖-夏尔河系统的水-能源-粮食安全

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-02-28 DOI: 10.1098/rsta.2021.0134

A. Bhave, D. Conway, S. Dessai, A. Dougill, David Mkwambisi

{"title":"Stress-testing development pathways under a changing climate: water-energy-food security in the lake Malawi-Shire river system","authors":"A. Bhave, D. Conway, S. Dessai, A. Dougill, David Mkwambisi","doi":"10.1098/rsta.2021.0134","DOIUrl":"https://doi.org/10.1098/rsta.2021.0134","url":null,"abstract":"Malawi depends on Lake Malawi outflows into the Shire River for its water, energy and food (WEF) security. We explore future WEF security risks under the combined impacts of climate change and ambitious development pathways for water use expansion. We drive a bespoke water resources model developed with stakeholder inputs, with 29 bias-corrected climate model projections, alongside stakeholder elicited development pathways, and examine impacts on stakeholder-elicited WEF sector performance metrics. Using scenario analysis, we stress-test the system, explore uncertainties, assess trade-offs between satisfying WEF metrics, and explore whether planned regulation of outflows could help satisfy metrics. While uncertainty from potential future rainfall change generates a wide range of outcomes (including no lake outflow and higher frequency of major downstream floods), we find that potential irrigation expansion in the Lake Malawi catchments could enhance the risk of very low lake levels and risk to Shire River hydropower and irrigation infrastructure performance. Improved regulation of lake outflows through the upgraded barrage does offer some risk mitigation, but trade-offs emerge between lake level management and downstream WEF sector requirements. These results highlight the need to balance Malawi's socio-economic development ambitions across sectors and within a lake-river system, alongside enhanced climate resilience. This article is part of the theme issue 'Developing resilient energy systems'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116671786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Transitioning to a high renewable net-zero power generation system in Malaysia 马来西亚向高可再生净零发电系统过渡

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-02-28 DOI: 10.1098/rsta.2021.0132

H. Chan, K. Sopian

{"title":"Transitioning to a high renewable net-zero power generation system in Malaysia","authors":"H. Chan, K. Sopian","doi":"10.1098/rsta.2021.0132","DOIUrl":"https://doi.org/10.1098/rsta.2021.0132","url":null,"abstract":"Malaysia is a net importer of coal, petroleum products and piped natural gas. Moreover, its primary energy supply is dominated by fossil fuels, at about 93% in total, with coal and natural gas constituting the highest shares in electricity generation. Thus, there is need for Malaysia to take swift action in transitioning to a high renewable energy system for long-term sustainability and meeting its climate action commitment under the Paris Agreement. A net-zero emissions vision guided by a roadmap may effectively motivate and catalyse carbon-free energy deployments. In this paper, we revisit the carbon-free energy roadmap that was developed in 2015 and compare it with the current generation development plan to identify the gaps between them. We argue that the roadmap is still relevant to the net-zero emissions vision; however, we have also identified gaps that merit further research and improvement. The identified gaps mainly relate to more recent data, along with technology and policy developments. Accordingly, we put forward potential research suggestions to bridge these gaps for future development of a roadmap that would assist Malaysia in shaping a long-term plan towards realizing a high renewable net-zero power generation system. This article is part of the theme issue ‘Developing resilient energy systems’.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":"245 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131253307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Socio-economic impacts of energy access through off-grid systems in rural communities: a case study of southwest Nigeria 农村社区通过离网系统获取能源的社会经济影响:尼日利亚西南部的案例研究

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-02-28 DOI: 10.1098/rsta.2021.0140

S. O. Babalola, M. Daramola, S. Iwarere

{"title":"Socio-economic impacts of energy access through off-grid systems in rural communities: a case study of southwest Nigeria","authors":"S. O. Babalola, M. Daramola, S. Iwarere","doi":"10.1098/rsta.2021.0140","DOIUrl":"https://doi.org/10.1098/rsta.2021.0140","url":null,"abstract":"The development of resilient energy systems is important for sustainable cities and communities. However, in countries with insufficient national energy supply, electricity distributors rarely consider remote communities due to their distant settlement, low electricity demand and poor payment capabilities. The United Nations has set a goal to deliver universal energy access by 2030; hence, it has become imperative to deploy clean and affordable off-grid mini-grid solutions to previously abandoned communities. Access to energy in rural communities is expected to result in unlocking their economic potentials. This paper investigates the impact of a solar hybrid mini-grid on the socio-economic growth of local entrepreneurs in Gbamu Gbamu village, Nigeria. A total of 83 micro- and small-enterprises has been surveyed; descriptive statistics, paired-sample t-test, cross-tabulation and χ2 test, were used to assess the performance of businesses before and after electrification. The outcomes include the number of business enterprises created, employment statistics, energy expenses and income generated. Regression analysis was conducted on the relationship between the average income generated by businesses and independent socio-economic variables such as gender, marital status, household size, age, education level, years of business establishment, hours of operation, building tenure, capital source, number of employees, generator ownership and the days of operation. This article is part of the theme issue 'Developing resilient energy systems'.","PeriodicalId":286094,"journal":{"name":"Philosophical transactions. Series A, Mathematical, physical, and engineering sciences","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129312747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Stokes drift and its discontents 斯托克斯漂流及其不满

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-02-23 DOI: 10.1098/rsta.2021.0032

J. Vanneste, W. Young

引用次数: 6

Bayesian emulation and history matching of JUNE JUNE的贝叶斯仿真与历史匹配

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences Pub Date : 2022-02-22 DOI: 10.1101/2022.02.21.22271249

I. Vernon, J. Owen, J. Aylett-Bullock, C. Cuesta-Lázaro, J. Frawley, A. Quera-Bofarull, A. Sedgewick, D. Shi, H. Truong, M. Turner, J. Walker, T. Caulfield, K. Fong, F. Krauss

引用次数: 12