检索结果-南通市图书馆

Precise Object Detection Using Iterative Superpixels Grouping Method

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2017年第2期15卷 153-160页

作者： Cheng-Chang Lien Yu-Wei Lin Huan-Po Hsu Kun-Ming Yu Ming-Yuan Lei Department of Computer Science and infonnation Engineering Chung Hua University Hsinchu 300 architecture and building research lnstitute New Taipci Citv 100

The region completeness of object detection is very crucial to video surveillance, such as the pedestrian and vehicle identifications. However, many conventional object detection approaches cannot guarantee the object region completeness because the object detection can be influenced by the illumination variations and clustering backgrounds. In order to overcome this problem, we propose the iterative superpixels grouping （ISPG） method to extract the precise object boundary and generate the object region with high completeness after the object detection. First, by extending the superpixel segmentation method, the proposed ISPG method can improve the inaccurate segmentation problem and guarantee the region completeness on the object regions. Second, the multi- resolution superpixel-based region completeness enhancement method is proposed to extract the object region with high precision and completeness. The simulation results show that the proposed method outperforms the conventional object detection methods in terms of object completeness evaluation.

关键词： Index Terms-lterative superpixels grouping method (ISPG) object completeness object detection superpixel video surveillance.

Green building research from design to operation in the past 20 years: A perspective

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2020年第5期14卷 1049-1055页

作者： Borong LIN Yi WANG Jiaping LIU Juan YU Department of building Science Tsinghua UniversityBeijing 100084China Key Laboratory of Eco Planning&Green building Ministry of EducationTsinghua UniversityBeijing 100084China State Key Laboratory of Green building in Western China Xi’an University of Architecture and TechnologyXi’an 710055China School of building Services Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China College of architecture Xi’an University of Architecture and TechnologyXi’an 710055China

dented levels during the past *** with the rapid urbanization crossing the world,serious environmental and energy issues have become global *** address these challenges,the promotion of green building is critical because the construction industry consumes about 40%of the total energy and accounts for 30%of the total greenhouse gas *** goals of green buildings is twofold:1)enhancing indoor environmental quality(IEQ),promoting human health and productivity;2)conserving energy,limiting pollutants and carbon dioxide emissions.

关键词： promotion operation dioxide

research on Photovoltaic Performance Reduction due to Dust Deposition: Modelling and Experimental Approach

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2019年第6期28卷 1186-1194页

作者： CHEN Yingya WANG Dengjia LIU Yanfeng DONG Yu LIU Jiaping State Key Laboratory of Green building in Western China Xi’an University of Architecture and TechnologyXi’an 710055China School of building Services Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

Photovoltaic(PV) power generation technology is the main renewable energy utilization technology. However, dust deposition severely affects the PV power generation efficiency and decreases the production capacity of PV power plants. In this study, the factors affecting PV technology were divided into the following three types: occlusion, corrosion, and temperature rise. A dust-collecting PV model considering dust deposition and rainfall scouring was established;a PV performance index was proposed. By conducting experiments with different dust mass densities, it was found that the short-circuit current(SCC), open-circuit voltage(OCV), and PV output power of PV decreased with the increase in dust mass density. In the initial stage of dust deposition, dust exhibited the greatest effect on the performance of PV. In the later stage of dust deposition, the effect of dust deposition became stable. The initial 10 g/m^2 dust decreased the PV output power by 34%. In addition, the conversion efficiency and fill factor(FF) decreased with the increase in dust mass density;both of them were exponential functions. When the dust mass density was low(less than 30 g/m^2), the dust mass density increased by 10 g/m^2, and the conversion efficiency decreased by an average of 3.4%. Finally, by conducting economic calculations, it was found that a PV power plant where dust has not removed for one year will cause 12% loss of power generation.

关键词： photovoltaic technology dust deposition conversion efficiency fill factor

research on the Weight of Index for the Assessment Standard for Green Store building

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2014年第5期21卷 20-25页

作者： Wei Zhao Jian Kang Hong Jin School of architecture Harbin Institute of Technology School of architecture University of Sheffield Chinese Society for Urban Studies Green building Council

Assessment standard for green store building of national standard has been compiled. The index has been given by experts' subjective assignment based on experience. Analytic hierarchy process has been used,making questionnaires of experts,using pairwise comparison and calculating the weight of each index. The weight of index in assessment would not only make quantitative evaluation on the whole situation of green store buildings,but also provide the foundation for compilation and revision.

关键词： Index weight Analytic hierarchy process Green store building Assessment standard

Record-breaking bifunctional oxygen electrocatalyst accomplished by a data-driven approach for zinc-air batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 144-145页

作者： Deviprasath Chinnadurai Zhi Wei Seh Institute of Materials research and Engineering (IMRE) Agency for Science Technology and Research (A*STAR)

Rechargeable zinc-air batteries(ZABs) have recently drawn great attention in energy research due to their high theoretical capacity,low costs, and inherently safe nature [1–3]. However, the sluggish cathode reactions necessitate the development of bifunctional oxygen electrocatalysts with lower ΔE indicator values. The ΔE indicator is commonly employed to quantitatively evaluate the electrocatalytic activity of a bifunctional oxygen electrocatalyst,representing the overall overpotential from oxygen reduction reaction(ORR) to oxygen evolution reaction(OER).

关键词： Data-driven approach Bifunctional oxygen electrocatalyst Record breaking performance Zinc-air batteries

Challenges and opportunities for carbon neutrality in China’s building sector—Modelling and data

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

building Simulation 2022年第11期15卷 1899-1921页

作者： Shan Hu Yang Zhang Ziyi Yang Da Yan Yi Jiang building Energy research Center School of ArchitectureTsinghua UniversityBeijing 100084China

The building sector is one of the largest energy user and carbon emitter *** achieve China’s national carbon target,the building sector in China needs to achieve carbon peaking and neutrality targets by 2030 and 2060,***,data deficiency on building energy and emissions become barriers for tracking the status of building energy and emissions,and identify potential opportunities for achieving dual carbon *** address these shortcomings,this study established an integrated China building Energy and Emission Model(CBEEM).With CBEEM,this study evaluated the building-construction and building-operation energy and emissions in China,and revealed the status quo and potential challenge and *** to modelling results,building operation energy use of China was 1.06 billion tce in 2020,accounting for 21%of China’s total primary energy *** construction energy consumption was 0.52 billion tce in 2020,accounting for another 10%of total primary energy *** messages found on building carbon emissions are:building construction embodied emissions were 1.5 billion tCO_(2) in 2020 and are declining slowly,building operational carbon emissions were 2.2 billion tCO_(2) in 2020 and are still *** comparisons between China and other countries on building stock,energy use intensity and carbon emission intensity were conducted as well,and help shed a light on the challenges for decarbonization of China’s building ***,technology perspectives to achieve carbon neutrality target were discussed and related policy suggestions were provided.

关键词： climate change building sector carbon neutrality global comparison China building energy and emission

Optimization of heat source side technical scheme of combined heat and water system based on a coal-fired power plant

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

building Simulation 2022年第8期15卷 1455-1473页

作者： Xiaolin Yang Zhaoyang Liu Jiayang Chen Ying Kong Wen Zheng Jianjun Xia building Energy research Center School of ArchitectureTsinghua UniversityBeijing 100084China

Recovering the waste heat(WH)of a power plant can conserve energy and reduce *** have proposed utilizing the WH of power plants in a combined heat and water(CHW)system,which is considered an economical,energy-saving,and environment-friendly way to integrate water and heat supply into long-distance transportation in urban areas of northern ***,to date,a detailed design of the case on the heat source side of the CHW has not been ***,in this study,the heat source side of a CHW system was divided into two cases:a single-generator set and a double-generator set,and both cases were *** parameters of a multi-effect desalination(MED)process were examined;the optimal number of evaporation stages during the MED process was 12,and the optimal heat source temperature during the first stage was ***,by matching the extraction and exhaust steam flows,the WH of the exhaust steam in the heating season was finally ***,under each case optimal conditions,energy,exergy,and cost were *** results showed that the exergy efficiency in the heating season for each case was approximately 50%,whereas that in the non-heating season was approximately 3.5%.The economy and water quality of the single-generator case were better than those of the double-generator ***,the absorption heat pump required in the single-generator case is difficult to realize because it operates under two working conditions.

关键词： waste heat of power plant-combined heat and water seawater desalination optimal case thermal economic analysis

research on parametric design method for energy efficiency of green building in architectural scheme phase

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Architectural research 2013年第1期2卷 11-22页

作者： Borong Lin Qiong Yu Ziwei Li Xiaoru Zhou Department of building Science School of Architecture Tsinghua University Beijing 100084 China

Based on a large number of researches and engineering practices both domestic and overseas, it is shown that the building parameters to be determined during scheme phase can exert a great effect on the building energy consumption. In this paper, through a combination of the popular design method of building parameterization at present and the design goat of energy saving during the scheme phase, the author carries out researches on the design methods and toot development which are applicable to parameterization of building energy saving in this stage. In connection with the characteristics of both modeling process of parameterization and energy saving design, and by means of steady calculation as wetl as simulation, this paper establishes an simplified model to calculate the overall energy consumption of air-conditioning, heating, lighting and equipments, and ultimately gives suggestions on design of scheme for energy saving by optimization with the genetic algorithm （GA）. On the basis of the model, a software platform is developed by computer language QTand openGL interface and is oriented to the design users and sets up the MMI （human-computer interaction） software interface for parameterization of building energy saving, which achieves automatic modeling of parameterization and promotes research on oractical design cases.

关键词： Scheme phase Parameterization ofenergy efficiency Prediction model ofenergy consumption Genetic atgorithm Human-computerinteraction

research on Two Types of Buffer Zone Impact on Surrounding Office Space Environment in Winter in Cold Climate Zone—a Fieldwork in Architectural Design Institute building of Tsinghua University,Beijing

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2014年第5期21卷 33-39页

作者： Ye-Hao Song Jun-Jie Li Ning Zhu Jia-Liang Wang Shi-Meng Hao School of architecture Tsinghua University Key Laboratory of Eco Planning & Green building Ministry of EducationTsinghua University

building buffer zone space is not only one of essential approaches for better mental quality of interior building space, but also an important factor that may influence interior thermal comfort and energy consumption. This study aims to analyze regulative advantages of buffer zone to the surrounding functional spaces. Based on a fieldwork test in a typical office building in cold climate zone in Beijing,China,the monitor data show interior physical performance in the Winter. The research selects two types of different buffer zones in the same building. One is a south-faced greenhouse which has large dimension with plenty of vegetation,and the other is a simple atrium in the middle of five floor building with mount of skylights. The factors and their influence to surrounding functional spaces and the whole building are found out from the comparisons of collected data by floor to floor monitor test on both buffer zones at the same time. The comparisons of two types of buffer zones conclude that the greenhouse is more effective to air quality regulation but not so clearly wellperformed to thermal buffering as expected due to the dominate active central heating in the Winter. This fieldwork test results for building performance can be helpful for both architects and engineers in the early phase of sustainable design.

关键词： public building buffer zone building performance fieldwork test space effect