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中国科学:技术科学(英文版)
中国科学:技术科学(英文版)

周光召

月刊

1674-7321

sales@scichina.org

010-64019820

100717

北京东黄城根北街16号

中国科学:技术科学(英文版)/Journal Science China Technological SciencesCSCDCSTPCDEISCI
查看更多>>《中国科学》是中国科学院主办、中国科学杂志社出版的自然科学专业性学术刊物。《中国科学》任务是反映中国自然科学各学科中的最新科研成果,以促进国内外的学术交流。《中国科学》以论文形式报道中国基础研究和应用研究方面具有创造性的、高水平的和有重要意义的科研成果。在国际学术界,《中国科学》作为代表中国最高水平的学术刊物也受到高度重视。国际上最具有权威的检索刊物SCI,多年来一直收录《中国科学》的论文。1999年《中国科学》夺得国家期刊奖的第一名。
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    Preface

    ZHANG YinPing
    2619页

    Review on the recent progress of nearly zero energy building frontiers in China

    LYU YanJieXU WeiZHANG ShiCongSUN DeYu...
    2620-2636页
    查看更多>>摘要:Energy efficiency improvement in Chinese construction has progressed rapidly over the past two decades.Nearly zero energy buildings(NZEBs),as an integrated solution for energy-efficient construction,have gained significant attention during China's 13th Five-Year Plan period,with continuous maturation of the technical system.In this study,a research framework built upon the accomplishments of China's National Key Research and Development Program is developed,and an in-depth analysis of the most cutting-edge research is provided by thoroughly reviewing the work conducted earlier.Developing NZEB in China has been categorized into three stages based on the characteristics of technological development:(1)definition and standards,(2)demonstration and promotion,and(3)cross-domain integration.This study discerns four noteworthy development trends by examining comprehensive data spanning the last decade from 100 NZEB and zero energy building.Further,a comprehensive analysis of essential technology advancements in line with these identified trends is performed.The issues and challenges arising from the increased application of renewable energy in the context of China's carbon peak and carbon neutrality goals have also been discussed.Finally,based on this analysis,the challenges and corresponding suggestions for future research directions were proposed to help guide future studies exploring emerging trends in the NZEB field.

    Air purifier or fresh air system?A comparison of energy consumption and cost in urban China residential buildings

    GUO YongSUN ZhiWeiWESCHLER Louise B.ZHANG YinPing...
    2637-2647页
    查看更多>>摘要:Chinese urban residential buildings face serious indoor air quality problems.Air purification systems(e.g.,air purifiers,fresh air systems)that supply fresh air or purify indoor air are widely used in residential buildings to improve indoor air quality.Considering the challenges of energy conservation and emission reduction,it is urgent to guide residents on choosing appropriate air purification systems.The key problem is how to identify the best air purification system with the lowest energy consumption or operating cost.Comparisons of air purification systems have rarely been conducted on the premise that they should deliver air such that the main indoor pollutant concentrations all meet air quality standards.Also ignored in comparisons are the increased filtration resistance caused by dust accumulation on the filter and the cost of filter replacement.In this study,we propose a method to compare residential air purification systems based on energy consumption and total cost,and we provide methods to select air purification systems in China's different climatic regions.We used a standard two-person bedroom as the example,and determined the most suitable(minimum cost or energy consumption)air purification systems for the capital cities of the provinces in Chinese mainland.

    How to achieve energy efficiency in buildings without compromising indoor air quality:A case study on enthalpy exchangers

    LI HaoZHANG TaoLIU XiaoHua
    2648-2658页
    查看更多>>摘要:As a representative heat recovery device,the fixed-plate enthalpy exchanger possesses the advantages of high recovery ef-fectiveness,low pressure drop,and small space occupied.Still,indoor contaminants may transfer to fresh air through the enthalpy exchanger simultaneously,causing cross-contamination risk.However,the cross-contamination risk of the fixed-plate enthalpy exchanger has been under-researched in previous studies.As a result,this study experimentally investigates the energy performance,formaldehyde and ammonia transfer rates of paper-based and membrane-based enthalpy exchangers.The results illustrate that the enthalpy recovery effectiveness of the plate exchangers ranges from 60%-85%.The formaldehyde transfer rate through the exchangers varies from 5%-23%,and the ammonia transfer rate is 0-15%.The high effectiveness and low contaminant transfer rates are conducive to the promising application of the fixed-plate enthalpy exchangers.In addition,the energy reclaimed increases with the increase of the absolute indoor-outdoor enthalpy difference.The formaldehyde and am-monia transfer rates and cross-contamination risk slightly decrease with increasing temperature but significantly increase with increasing humidity.Moreover,the experimental results demonstrate that the contaminant transfer rates through the membrane-based exchanger are lower than those of the paper-based exchanger.This study provides a reference for the fixed-plate enthalpy exchanger design in practical applications.

    Low-carbon design towards sustainable city development:Integrating glass space with natural greenery

    CAO Shi-JieZHANG CunKuanWANG JunQiFENG ZhuangBo...
    2659-2674页
    查看更多>>摘要:The rapid urban development has caused serious problems such as high energy consumption and carbon emissions,especially under the context of climate change.Buildings are particularly energy-intensive,generating about one third of global energy-related carbon emissions.Compared with active solutions(like mechanical systems),passive solutions offer the potential to balance energy consumption,thermal comfort,and ecological benefits.One potential solution is the integration of green glass space(GGS)into passive building design.GGS is a transitional building space with glass curtain walls that exhibit excellent insulation performance during winter.However,GGS is susceptible to overheating during summer,which limits its applicability.Therefore,this work proposes a strategy of integrating vertical greenery into GGS,leveraging the nature-based solution of greenery(i.e.,flourishes in summer and withers in winter)to address this seasonal challenge of GGS.The results demonstrated that the strategic application of vertical greenery can effectively mitigate the overheating in GGS and improve comprehensive benefits.By using full coverage of vertical greenery in a linear layout,the air temperature of GGS and cooling energy consumption were largely reduced by 8.02℃ and 12.2%,respectively,while the carbon abatement was enhanced by up to 101.11 tons.Based on a comprehensive evaluation of energy,economy,and environmental benefits,it is recommended to use a greenery configuration with 50%coverage in a vertical linear layout for GGS.The integration of greenery into building design can mitigate adverse environmental impacts,reduce energy consumption,and contribute to the sustainable development of low-carbon cities.

    A study on the impact of heritage protection on urban carbon emissions

    WANG FangXUE PengChengWANG ShunYiLIU YunHuai...
    2675-2692页
    查看更多>>摘要:A major goal of current international urban development and construction is to lower carbon emissions.Synergies exist between the preservation of historic cities and the development of low-carbon cities;however,the relationship between preservation of historic cities and carbon emissions remains unclear.This study focuses on the cities in the"Yellow-Canal-Yangtze"watershed community,which includes the Yellow River Basin,Yangtze River Basin,and the Grand Canal region,and aims to verify the differences in CO2 emissions(CE)between historic and non-historic cities through multiple comparisons after ANOVA.Additionally,Ridge Regression was used to determine the impact and dimensions of the relevant variables associated with the preservation of historic cities on CE.Combined with national development goals,this study predicts changes in the CE of historic city preservation under different scenarios.This study found significant differences between historic and non-historic cities,as the total CE of historic cities is 2.42 times higher than that of non-historic cities.The dimension with the largest difference was the CE related to transportation,with aviation emissions of historic cities reaching 15.22 times higher than that of non-historic cities.Although the preservation of historic cities has led to an overall increase in the CE,there is significant potential for CE reduction in land use,transportation infrastructure,and tourism development related to historic city pre-servation.In the future,historic cities can contribute to China's carbon neutrality and the United Nation's development goals through the creation of larger historical preservation areas,more convenient public transportation,and more vibrant tourism.

    Semi-volatile organic compounds in a museum in China:A non-targeted screening approach

    SONG ZiDongNIAN LuYingSHI MengREN XiaoPeng...
    2693-2705页
    查看更多>>摘要:Non-targeted analysis(NTA)was conducted to identify semi-volatile organic compounds(SVOCs)in a museum in China using the gas chromatography(GC)-Orbitrap-mass spectrometer(MS).Approximately 160 SVOCs were detected,of which 93 had not been reported in previous studies of museum environments.Many of the detected SVOCs were found to be associated with the chemical agents applied in conservation treatment and the materials used in furnishings.The results of hierarchical cluster analysis(HCA)indicated a spatial variation of SVOCs in the indoor air in the museum,but there were no obvious temporal differences of SVOCs observed in indoor dust.Spearman's correlation analysis showed that several classes of SVOCs were well correlated,suggesting their common sources.Fragrances and plasticizers were found to be the primary sources of SVOC pollution detected in the museum.Compared with compounds in outdoor air,indoor SVOCs had a lower level of unsaturation and more portions of chemically reduced compounds.This study is the first of its kind to comprehensively characterize SVOCs in a museum using an automated NTA approach with GC-Orbitrap-MS.The SVOCs identified in the current study are likely to be present in other similar museums;therefore,further examination of their potential impacts on cultural heritage artifacts,museum personnel,and visitors may be warranted.

    Study on carbon emission calculation method and carbon reduction indexes of urban building stock

    YANG LiuZHANG NanLU MeiLUO ZhiXing...
    2706-2726页
    查看更多>>摘要:Carbon emissions associated with buildings are a major source of urban emissions.To put forward the methods and strategies to curb carbon emissions from urban building stock,it is not only necessary to establish a carbon emission calculation method for fine statistical analysis,but also to evaluate carbon emissions of urban planning schemes with applicable indexes.Currently,researches mainly focus on carbon emissions of individual buildings.When expanded to urban building stock,the calculation faces the lack of basic data,inadequate spatial analysis and unspecific carbon reduction indexes.Therefore,this study proposes a bottom-up calculation method for urban building stock,conducts spatial analysis based on carbon balance of urban grids,reveals the coupling mechanism between urban carbon reduction indexes and grid carbon emissions,and systematically establishes a carbon-reduction-oriented urban planning method that comprises calculation,analysis and evaluation,which is applied to Xi'an,China.This study provides a theoretical reference for cities to formulate carbon reduction targets and implement planning strategies by evaluating and predicting carbon emissions from urban building stock.

    Computer vision tasks for intelligent aerospace perception:An overview

    CHEN HuiLinSUN QiYuLI FangFeiTANG Yang...
    2727-2748页
    查看更多>>摘要:Computer vision tasks are crucial for aerospace missions as they help spacecraft to understand and interpret the space environment,such as estimating position and orientation,reconstructing 3D models,and recognizing objects,which have been extensively studied to successfully carry out the missions.However,traditional methods like Kalman filtering,structure from motion,and multi-view stereo are not robust enough to handle harsh conditions,leading to unreliable results.In recent years,deep learning(DL)-based perception technologies have shown great potential and outperformed traditional methods,especially in terms of their robustness to changing environments.To further advance DL-based aerospace perception,various frameworks,datasets,and strategies have been proposed,indicating significant potential for future applications.In this survey,we aim to explore the promising techniques used in perception tasks and emphasize the importance of DL-based aerospace perception.We begin by providing an overview of aerospace perception,including classical space programs developed in recent years,commonly used sensors,and traditional perception methods.Subsequently,we delve into three fundamental perception tasks in aerospace missions:pose estimation,3D reconstruction,and recognition,as they are basic and crucial for subsequent decision-making and control.Finally,we discuss the limitations and possibilities in current research and provide an outlook on future developments,including the challenges of working with limited datasets,the need for improved algorithms,and the potential benefits of multi-source information fusion.

    Numerical investigation on the flow and thermal behaviors of the volumetric solar receivers with different morphologies

    DU ShenLI DongLI MengJieHE YaLing...
    2749-2757页
    查看更多>>摘要:Morphologies of the porous materials influence the processes of solar radiation transport,flow,and thermal behaviors within volumetric solar receivers.A comprehensive comparative study is conducted by applying pore scale numerical simulations on volumetric solar receivers featuring various morphologies,including Kelvin,Weaire-Phelan,and foam configurations.The idealized unit cell and X-ray computed tomography scan approaches are employed to reconstruct pore scale porous models.Monte Carlo ray tracing and pore scale numerical simulations are implemented to elucidate the radiative,flow,and thermal behaviors of distinct receivers exposed to varying thermal boundary conditions and real irradiation situations.The findings demonstrate that the foam structure exhibits greater solar radiation absorptivity,while Kelvin and Weaire-Phelan structures enhance the penetration depth under non-perpendicular solar irradiation.In comparison with Kelvin and Weaire-Phelan con-figurations,the foam structure presents efficient convective heat transfer,with the Weaire-Phelan structure showing pronounced thermal non-equilibrium phenomena.The variance in convective heat transfer coefficient between Kelvin and Weaire-Phelan configurations is approximately 8.4%.The foam structure exhibits higher thermal efficiency and flow resistance under non-perpendicular irradiation compared to Kelvin and Weaire-Phelan structures,attributed to its smaller pore size and intricate flow channels.An increase of 1.3%in thermal efficiency is observed with a substantial rise in pressure drop of 32.2%.