检索结果-内蒙古大学图书馆

arXiv 2023年

作者： Wagner, Fabien H. Roberts, Sophia Ritz, Alison L. Carter, Griffin Dalagnol, Ricardo Favrichon, Samuel Hirye, Mayumi C.M. Brandt, Martin Ciais, Philipe Saatchi, Sassan Institute of Environment and Sustainability University of California Los AngelesCA United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove PasadenaCA91109 United States CTrees PasadenaCA91105 United States Virginia Polytechnic Institute State University Interdisciplinary Graduate Education Program in Remote Sensing Blacksburg United States Quapá Lab Faculty of Architecture and Urbanism University of São Paulo SP São Paulo05508080 Brazil Department of Geosciences and Natural Resource Management University of Copenhagen Copenhagen1350 Denmark Laboratoire des Sciences du Climat et de l’Environnement CEA-CNRS-UVSQ CE Orme des Merisiers Gif sur Yvette91190 France

Tree canopy height is one of the most important indicators of forest biomass, productivity, and species diversity, but it is challenging to measure accurately from the ground and from space. Here, we used a U-Net model adapted for regression to map the canopy height of all trees in the state of California with very high-resolution aerial imagery (60 cm) from the USDA-NAIP program. The U-Net model was trained using canopy height models computed from aerial LiDAR data as a reference, along with corresponding RGB-NIR NAIP images collected in 2020. We evaluated the performance of the deep-learning model using 42 independent 1 km2 sites across various forest types and landscape variations in California. Our predictions of tree heights exhibited a mean error of 2.9 m and showed relatively low systematic bias across the entire range of tree heights present in California. In 2020, trees taller than 5 m covered ∼ 19.3% of California. Our model successfully estimated canopy heights up to 50 m without saturation, outperforming existing canopy height products from global models. The approach we used allowed for the reconstruction of the three-dimensional structure of individual trees as observed from nadir-looking optical airborne imagery, suggesting a relatively robust estimation and mapping capability, even in the presence of image distortion. These findings demonstrate the potential of large-scale mapping and monitoring of tree height, as well as potential biomass estimation, using NAIP *** Codes 92-08 © 2023, CC BY.

关键词： Antennas

来源：评论

学校读者我要写书评

暂无评论

The Prospect of Geotourism in the Cycloop Mountains Conservation Area Papua

引用

IOP Conference Series: Earth and Environmental Science 2022年第1期950卷

作者： P Setiadji B Sulistyantara B Pramudya Suwardi Student of Natural Resources and Environmental Study Program Graduate School of IPB Lecturer of Department of Landscape Architecture Faculty of Agriculture IPB Lecturer of Department of Mechanical and Biosystem Engineering Fateta IPB Lecturer of Department of Soil Science and Land Resources Faculty of Agriculture IPB

The Cycloop mountains in Papua are a nature reserve conservation area that has diverse geology, biology and culture. This paper discusses the prospects of geotourism in Cycloop mountains based on a method of analyzing the community acceptability and tourists preferences, likewise the geosite attraction and geotourism sustainability. The results of analysis indicates that a) village communities in surrounding conservation area accept and wish to get involved in natural activities; b) local tourists are very dominant and motivated on outdoor recreation in groups; c) identified geosites has classified as from Quite Interesting to Interesting based on the index of attractiveness; and d) geotourism activity in the mountains Cycloop is categorized Quite Sustainable reviewed from the environment, society, economy and governance dimension. The exploration and the geological conservation to be the reliable activities in organizing the geotourism. Geotourism is likely to be applied to the conservation area as a form of implementation of the sustainable tourism concept.

关键词：

来源：评论

学校读者我要写书评

暂无评论

MAPPING TROPICAL FOREST COVER AND DEFORESTATION WITH PLANET NICFI SATELLITE IMAGES AND DEEP LEARNING IN MATO GROSSO STATE (BRAZIL) FROM 2015 TO 2021

arXiv

引用

arXiv 2022年

作者： Wagner, Fabien H. Dalagnol, Ricardo Silva-Junior, Celso H.L. Carter, Griffin Ritz, Alison L. Hirye, Mayumi C.M. Ometto, Jean P.H.B. Saatchi, Sassan Institute of the Environment and Sustainability University of California Los AngelesCA90095 United States NASA-Jet Propulsion Laboratory California Institute of Technology PasadenaCA91109 United States *** Pasadena United States Virginia Polytechnic Institute State University Interdisciplinary Graduate Education Program in Remote Sensing BlacksburgVA24061 United States Quapá Lab Faculty of Architecture and Urbanism University of São Paulo—USP SP São Paulo Brazil Earth Observation and Geoinformatics Division National Institute for Space Research INPE SP São José dos Campos Brazil

Monitoring changes in tree cover for rapid assessment of deforestation is considered the critical component of any climate mitigation policy for reducing carbon. Here, we map tropical tree cover and deforestation between 2015 and 2022 using 5 m spatial resolution Planet NICFI satellite images over the state of Mato Grosso (MT) in Brazil and a U-net deep learning model. The tree cover for the state was 556510.8 km2 in 2015 (58.1 % of the MT State) and was reduced to 141598.5 km2 (14.8 % of total area) at the end of 2021. After reaching a minimum deforested area in December 2016 with 6632.05 km2, the bi-annual deforestation area only showed a slight increase between December 2016 and December 2019. A year after, the areas of deforestation almost doubled from 9944.5 km2 in December 2019 to 19817.8 km2 in December 2021. The high-resolution data product showed relatively consistent agreement with the official deforestation map from Brazil (67.2%) but deviated significantly from year of forest cover loss estimates from the Global Forest change (GFC) product, mainly due to large area of fire degradation observed in the GFC data. High-resolution imagery from Planet NICFI associated with deep learning technics can significantly improve mapping deforestation extent in tropics. © 2022, CC BY.

关键词： Land use

来源：评论

学校读者我要写书评

暂无评论

Free vibration of orthotropic Levy-type solution plates by using SEM 7

Free vibration of orthotropic Levy-type solution plates by u...

引用

7th International Conference on Euro Asia Civil Engineering Forum, EACEF 2019

作者： Kiryu, S. Alisjahbana, S.W. Alisjahbana, I. Han, A.L. Gan, B.S. Department of Architecture Graduate School of Engineering Nihon University Koriyama Japan Faculty of Engineering and Informatics Bakrie University Jakarta Indonesia Department of Civil and Environmental Engineering Master Program Student Stanford University CA United States Civil Engineering Department Faculty of Engineering Universitas Diponegoro Semarang Indonesia Department of Architecture College of Engineering Nihon University Koriyama Japan

Orthotropic Levy-type solution plates considering shear deformation were solved by using the Spectral Element Method (SEM). In SEM, the exact solution of structural dynamic related problems can be solved by using the frequency-dependent shape functions. The solutions of SEM are accurate in decreasing the amount of Degree Of Freedoms (DOF) to discard the cost and computational disadvantages in the Finite Element Method (FEM). This study investigates the free vibration problems of orthotropic Levy-type solution plates solutions based on the two variable Refined Plate Theory (RPT). SEM for orthotropic Levy-type solution plates in the frequency domain was formulated to solve free vibration problems. The differential governing equations of the orthotropic plate element in SEM are formulated into the form of transcendental stiffness matrices. The boundary conditions of the spectral element model consist of four edge-type DOFs at each side of the orthotropic Levy-type solution plates. The natural frequencies of the plate are calculated by means of the Wittrick-Williams procedure. The numerical investigations are presented to show the accuracy, efficiency, and effectiveness of SEM without any discretization scheme. © Published under licence by IOP Publishing Ltd.

关键词： Stiffness matrix

来源：评论

学校读者我要写书评

暂无评论

Finite-difference diffusion-equation modeling of reverberation chambers in time-domain

引用

The Journal of the Acoustical Society of America 2022年第4_SUPPLEMENT期152卷 A252-A252页

作者： Jiahua Zhang Juan Navarro Ning Xiang Mélanie Nolan School of Architecture Rensselaer Polytechnic Inst. 110 8th St. Graduate Program in Architectural Acoust. Troy NY 12180 zhangj45@rpi.edu Polytechnic Sci. Dept. San Antonio’s Catholic Univ. Murcia Spain School of Architecture Rensselaer Polytechnic Inst. Troy NY

Conventional chamber-based methods of random incidence absorbing coefficients overlook the non-diffused sound field in the room acoustics, which decreases accuracy and may even lead to conflicting results. This work applies the diffusion equation model to room-acoustic simulations of standardized reverberation chambers. The simulations can more efficiently capture the chamber's non-diffuse sound field and energy flows than wave-based simulation models. The diffusion equation represents the governing equation of reverberant sound energy densities within the reverberation chamber which is solved using the finite-difference time-domain method. Its computational efficiency of diffusion equation-based modeling lies in a highly sparse domain meshing condition dictated by the mean-free path length rather than wavelengths and still derives a wideband simulation result. This work also dedicates the effort to reexamine the meshing condition, particularly for standardized finite sizes of sound absorbers for measurements of random incidence absorption coefficients. By comparing the outcomes of simulations with measurement data, an a posteriori absorption coefficient is inversely estimated involving Bayesian parameter estimation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Urban Rules and Morphology Analysis as Support to Solar Performance in Passo Fundo/RS, Brazil

引用

IOP Conference Series: Earth and Environmental Science 2020年第1期503卷

作者： F Moscarelli G Tibério Cardoso Stricto Sensu Graduate Program in Architecture and Urbanism UniRitter-Laureate International Universities Porto Alegre/RS Brazil Stricto Sensu Graduate Program in Architecture and Urbanism Passo Fundo/RS Brazil.

The expansion and densification of cities should be planned to ensure minimum health conditions for buildings. In this sense, this study is interested in the right to solar access for buildings using the analysis of solar envelope to propose urban forms that guarantee this right. The study is in the exploratory phase, and it is applied to the city of Passo Fundo, Brazil. The study started from an analysis of the pre-existing morphological structure, and the solar envelope was generated using the Ladybug tool plugins for Grasshopper and Diva applications in Rhinoceros software. The results showed that the pre-existing urban form has low solar performance, evidencing the need to review construction rules according to the pattern and positioning of lots. Thus, it is expected to be counterbalanced by the revision of urban rules, proposing subsidies for the reformulation and adequacy, or creation of new legislation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Reduction of greenhouse gas emissions of Azolla Pinnata inclusion in backyard chicken production

引用

Nature Environment and Pollution Technology 2020年第5期19卷 1861-1869页

作者： Espino, M.T.M. Bellotindos, L.M. Engineering Graduate Program School of Engineering University of San Carlos Talamban Campus Cebu City6000 Philippines Department of Industrial Engineering School of Engineering and Architecture Ateneo de Davao University Davao City8000 Philippines School of Engineering University of San Carlos Talamban Campus Cebu City6000 Philippines

Backyard chicken production is an integral part among rural families in the tropics like the Philippines. However, it has been declining as it continues to suffer low productivity with its small-scale operations. Among its production inputs, feeds remain to be the top cost driver, as well as the top contributor to greenhouse gas (GHG) emissions that result in global warming potential (GWP). In a prior experiment, 50% inclusion of Azolla Pinna was recommended in feed ration due to its favourable and comparable growth performance of Dominant DZ backyard chickens. Hence, this study further evaluated the inclusion in terms of environmental performance. The 50% inclusion resulted in reductions of CO2 by 35%, N2O by 22.32%, and CH4 by 4.74%. The gross effect of this reduction of conventional feeds is a climate change mitigation equivalent 28.47% of GWP kg CO2 -eq./1,000 birds. The potential impacts indicate that Azolla Pinnata can be a cost-effective and sustainable feedstuff in backyard chicken rearing system especially that it requires simple propagation method. The environmental impacts and savings can encourage more livelihood activities in rural. © 2020 Technoscience Publications. All rights reserved.

关键词： Greenhouse gases

来源：评论

学校读者我要写书评

暂无评论

ZETA: a library for Zonotope-based EsTimation and fAult diagnosis of discrete-time systems

arXiv

引用

arXiv 2025年

作者： Rego, Brenner S. Scott, Joseph K. Raimondo, Davide M. Terra, Marco H. Raffo, Guilherme V. Department of Electrical and Computer Engineering University of São Paulo SP São Carlos13566-590 Brazil Department of Chemical and Biomolecular Engineering Georgia Institute of Technology 311 Ferst Dr. AtlantaGA30318 United States Department of Engineering and Architecture University of Trieste Trieste34127 Italy Department of Electronics Engineering Graduate Program in Electrical Engineering Federal University of Minas Gerais MG Belo Horizonte31270-901 Brazil

This paper introduces ZETA, a new MATLAB library for Zonotope-based EsTimation and fAult diagnosis of discrete-time systems. It features user-friendly implementations of set representations based on zonotopes, namely zonotopes, constrained zonotopes, and line zonotopes, in addition to a basic implementation of interval arithmetic. This library has capabilities starting from the basic set operations with these sets, including propagations through nonlinear functions using various approximation methods. The features of ZETA allow for reachability analysis and state estimation of discrete-time linear, nonlinear, and descriptor systems, in addition to active fault diagnosis of linear systems. Efficient order reduction methods are also implemented for the respective set representations. Some examples are presented in order to illustrate the functionalities of the new library. © 2025, CC BY.

关键词： Digital arithmetic

来源：评论

学校读者我要写书评

暂无评论

Performance assessment design based on problem based learning for vocational high school students skills competency geomatics engineering

引用

AIP Conference Proceedings 2022年第1期2489卷

作者： Reni Nuril Komari Sudjani Sudjani Johar Maknun 1Technology and Vocational Education Post Graduate Program Universitas Pendidikan Indonesia Bandung Indonesia 2Department of Civil Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia 3Department of Architecture Engineering Education Universitas Pendidikan Indonesia Bandung Indonesia

The study of performance assessment based on problem based learning not only done in the field of technical vocational education but also in the health education, economic education, environmental education. The development of performance assessment based on problem based learning is still rare in vocational schools. Using 2013 curriculum which is required to use 21st century learning strategies, one of which is Problem Based Learning (PBL). Performance assessment is said by its advocators to be more in line with instruction than multiple-choice tests. Performance assessment is seen as having a better possibility of measuring more complex skills and communication. This article aims to design based performance assessment based on problem based learning using design based research method. The validation used in this article is expert judgement. The result of the study revealed that the cronbach alpha valu for the entire measurment scale was 0.97. The cronbach alpha value is between 0.8 to 1.00. Therefore , design performance assessment based on problem based learning has a good reability. This article aims to find out how to design performance assessment based on problem based learning for students geomatics engineering. This article provide an overview of the development of design performance assessment based on problem based learning for vocational students.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The social and psychological antecedents of cycling in Brazil

Journal of Cycling and Micromobility Research

引用

Journal of Cycling and Micromobility Research 2024年 2卷

作者： Lucas Heiki Matsunaga Ingrid Luiza Neto Tim Jones Hartmut Günther Caroline Cardoso Machado Júlio Celso Vargas Eleonora D’Orsi Department of International Environment and Resources Policy Tohoku University Japan Department of Psychology University of the Federal District Brazil School of the Built Environment Oxford Brookes University England UK Graduate Program of Social Work and Organizational Psychology University of Brasilia Brazil School of Architecture and Urbanism University of Brasília Brazil Deparment of Urbanism Federal University of Rio Grande do Sul Brazil Department of Public Health Federal University of Santa Catarina Brazil

Cycling is widely regarded as a healthy and sustainable transport option in urban environments. However, there is an emergent need to understand how cycling in countries like Brazil, can be encouraged and supported, particularly among different sections of the population. This study investigates social-psychological antecedents of cycling within the Brazilian context using a large-scale dataset to verify the appropriateness of a model based on the extended Theory of Planned Behaviour (e-TPB). In-person interviews were conducted with people living in three large Brazilian cities – Brasília ( n =1107), Florianópolis ( n =1084), and Porto Alegre ( n =1105) using a questionnaire including nine items from the e-TPB to measure attitudes, social norms, perceived behavioural control, intention, cycling behaviour, and habit. Multigroup analysis verified the model fit and invariance in structural weights by gender. Age and gender were revealed to be the only sociodemographic variables with significant influence on the components’ mean scores, with gender exhibiting the strongest influence. We concluded that the e-TPB allows us to explain cycling behaviour among this sample of the Brazilian population and that it is particularly sensitive to (a) other people's influence (b) personal habit (c) perceived behavioural control (d) belief in the ability to change one’s behaviour. Women were less likely to cycle and were less likely to be influenced by social-psychological components that could encourage this type of activity. Thus, we conclude that understanding the social and cognitive determinants of cycling can help to design more targeted policies for different sections of society.

关键词： Theory of Planned Behaviour Cycling Gender Age Brazil Habit

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：