Residential energy-use behavior and energy-saving awareness play a crucial role in sustainable urban energy planning and building energy efficiency,particularly under the pressures of climate change.However,existing s...Residential energy-use behavior and energy-saving awareness play a crucial role in sustainable urban energy planning and building energy efficiency,particularly under the pressures of climate change.However,existing studies often lack comparative analysis of urban-rural differences and tend to focus excessively on behavior patterns while neglecting the dimension of energysaving awareness.With China’s urbanization rate reaching 66.16%,understanding such regional disparities has become increasingly important.To address these research gaps,this study conducts a large-scale survey on space cooling behaviors among residents in Beijing,a representative Chinese megacity.It should be noted that living standards in such megacities are generally higher than the national average,which may shape distinctive energy-use profiles.Analyzing 1573valid samples(1064 urban/442 rural)in 2024,this study employed K-Prototypes and K-Modes clustering to identify typical cooling behavior and energy-saving awareness pattems,followed by Kendall/Chi-square correlation tests and XGBoost importance analysis to determine key influencing factors,with subsequent urban-rural comparative analysis.Results indicate that urban residents are primarily heat-sensitive or heat-tolerant,with a secondary patten of mid-low temperature preference,and generally exhibit long cooling durations;rural behavior is dominated by heat-tolerant type,followed by heat-sensitive,mid-low temperature preference,and never-on types as secondary patterns;both urban and rural areas exhibit energy-savingawareness characterized by low consumption-lowwillingness,though urban areas show marginally higher motivation;energy-saving awareness correlates with cooling behavior in rural areas,but this relationship weakens significantly in urban contexts.展开更多
As an indispensable part of modern buildings,centralized central air conditioning systems play an important role in maintaining the comfort and air quality of the indoor environment.However,with the increasing energy ...As an indispensable part of modern buildings,centralized central air conditioning systems play an important role in maintaining the comfort and air quality of the indoor environment.However,with the increasing energy consumption,how to improve the energy efficiency ratio of air conditioning systems and reduce energy consumption has become an important issue in research and practice.The purpose of this paper is to discuss the impact of humidity control strategies on energy saving in centralized central air conditioning systems,with a view to providing a theoretical basis and practical guidance for realizing building energy efficiency.展开更多
[Objectives]This study was conducted to improve the seed production efficiency of water-saving and drought-resistant hybrid millet in production.[Methods]A high-efficiency seed production technology for water-saving a...[Objectives]This study was conducted to improve the seed production efficiency of water-saving and drought-resistant hybrid millet in production.[Methods]A high-efficiency seed production technology for water-saving and drought-resistant hybrid millet varieties was developed by integrating aspects such as parental line sources,botanical characteristics,biological traits,seed production yield structure,key technical points of seed production,and suitable planting regions.[Results]Under standardized pre-sowing preparation and field management,both parents are simultaneously sown around May 20 with a planting row ratio of 2:6(female:male),a row spacing of 20 cm and plant spacing of 10 cm for the female parent,and a row spacing of 35 cm and plant spacing of 15 cm for the male parent.Both parents are fertilized simultaneously with 375 kg/hm^(2) of urea at the booting stage combined with intertillage or rainfall,and 225 kg/hm^(2) of urea at the grain-filling stage combined with irrigation.Strict hybrid removal,proper pollination and timely harvesting can significantly increase the yield of seed production.[Conclusions]This technology can be fully applied to large-scale seed production of water-saving and drought-resistant hybrid millet,providing seed supply support for cultivation in arid and semi-arid regions.It helps alleviate issues such as excessive groundwater extraction and water scarcity while enhancing planting efficiency,increasing yield,and boosting increase of farmers income.展开更多
Terahertz(THz) and millimeter Wave(mmWave) have been considered as potential frequency bands for 6G cellular systems to meet the need of ultra-high data rates. However, indoor communications could be blocked in THz/mm...Terahertz(THz) and millimeter Wave(mmWave) have been considered as potential frequency bands for 6G cellular systems to meet the need of ultra-high data rates. However, indoor communications could be blocked in THz/mmW cellular systems due to the high free-space propagation loss. Deploying a large number of small base stations indoors has been considered as a promising solution for solving indoor coverage problems. However, base station dense deployment leads to a significant increase in system energy consumption. In this paper, we develop a novel ultra-efficient energy-saving mechanism with the aim of reducing energy consumption in 6G distributed indoor base station scenarios. Unlike the existing relevant protocol framework of 3GPP, which operates the cellular system based on constant system signaling messages(including cell ID, cell reselection information, etc.), the proposed mechanism eliminates the need for system messages. The intuition comes from the observation that the probability of having no users within the coverage area of an indoor base station is high, hence continuously sending system messages to guarantee the quality of service is unnecessary in indoor scenarios. Specifically, we design a dedicated beacon signal to detect whether there are users in the coverage area of the base station and switch off the main communication module when there are no active users for energy saving. The beacon frame structure is carefully designed based on the existing 3GPP specifications with minimal protocol modifications, and the protocol parameters involved are optimized. Simulation results show that the proposed mechanism can reduce the system energy from the order of tens of watts to the order of hundreds of milliwatts. Compared to traditional energy-saving schemes, the proposed mechanism achieves an average energy-saving gain of 58%, with a peak energy-saving gain of 90%.展开更多
Getzner Textil AG is always open to new ideas and committed to investment in innovative technological so-lutions.This has proven a highly successful approach for more than two hundred years now:founded in 1818 as a fa...Getzner Textil AG is always open to new ideas and committed to investment in innovative technological so-lutions.This has proven a highly successful approach for more than two hundred years now:founded in 1818 as a family business in Bludenz in the heart of Europe,the company is now one of the world's leading manufacturers of fabrics for African fashion,shirts and blouses,corporate fashion,and technical textiles,with 1,550 employees,710 weaving machines,seven locations,and an output of 73 million running meters per year.展开更多
Extensive changes in land cover and energy use resulting from urbanization lead to an imbalance in urban thermal conditions,making cities more susceptible to the impacts of climate change.Nature-based solutions(NbS)th...Extensive changes in land cover and energy use resulting from urbanization lead to an imbalance in urban thermal conditions,making cities more susceptible to the impacts of climate change.Nature-based solutions(NbS)that leverage the cooling effect of green spaces to mitigate urban heat are gaining attention as a way to improve urban sustainability in the face of climate change.The study evaluated the urban-scale application of NbS's impacts on heat mitigation capacity,air temperature,cooling energy,carbon emissions,and carbon sequestration,as well as the resulting economic benefits using the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)Urban Cooling Model(UCM).Green roofs as building adaptations,land use adaptations such as the expansion of urban parks and roadside green space,forest restoration,and multiple adaptations,which are combinations of building and land use adaptations,were considered applicable NbS.Cool roofs were also studied to compare their effects with other urban green infrastructure.The results showed that simultaneously implementing the multiple adaptation methods is the most effective if the applicable areas are sufficient.Considering the implemented area ratio,urban parks are the most effective single adaptive measure,with energy savings of 14.75,8.63,and 1.98 times higher than those of 100%green roofs,cool roofs,and 20%roadside green space expansions,respectively.Restoring forests(21.29 km^(2))can yield 4.7 times higher energy savings than installing 100%green roofs(62 km^(2)).In contrast,deforestation loses more energy and carbon than cool roofs can save.This study can help provide an appropriate strategy for achieving urban carbon neutrality by reducing carbon emissions and increasing carbon sequestration through NbS in addition to relieving urban temperatures.展开更多
Construction engineering plays a vital role in urban development,especially as the pace of modern progress continues to accelerate.The widespread use of energy-saving and green environmental protection building materi...Construction engineering plays a vital role in urban development,especially as the pace of modern progress continues to accelerate.The widespread use of energy-saving and green environmental protection building materials in this field not only brings convenience to daily life but also promotes the scientific,sustainable,and stable development of construction projects.These materials significantly extend the service life of buildings while supporting environmental protection efforts.This paper explores the practical application value of energy-saving and environmentally friendly building materials in construction engineering,outlines the key application principles,and analyzes their specific types and usage requirements.The aim is to provide a valuable reference for future research and practical implementation.展开更多
At the forthcoming IGATEX textile machinery exhibition inKarachi,Pakistan,from April 24-26,Monforts will highlight thebenefits of its latest Universal Energy Tower.This stand-aloneair/air heat exchanger module enables...At the forthcoming IGATEX textile machinery exhibition inKarachi,Pakistan,from April 24-26,Monforts will highlight thebenefits of its latest Universal Energy Tower.This stand-aloneair/air heat exchanger module enables recovery of the heatfrom the exhaust air flow of thermal systems such as existingstenters and THERMEX dyeing ranges with infrared predriers,resulting in energy savings of up to 25%,depending on the ex-haust air volume and operating temperature.展开更多
目的介绍欧洲“Kids Save Lives(儿童拯救生命)”项目的实践经验,为我国中小学生心肺复苏教育的开展提供参考,让中小学生从小掌握CPR技能,进而提高旁观者CPR率、提高院外心跳骤停的存活率,并从小培养公民的社会责任感。方法梳理欧洲心...目的介绍欧洲“Kids Save Lives(儿童拯救生命)”项目的实践经验,为我国中小学生心肺复苏教育的开展提供参考,让中小学生从小掌握CPR技能,进而提高旁观者CPR率、提高院外心跳骤停的存活率,并从小培养公民的社会责任感。方法梳理欧洲心肺复苏急救教育项目“Kids Save Lives”的提出背景及欧洲各国的最佳实践,总结我国学校急救教育现状,对我国中小学生心肺复苏急救教育提出建议。结果我国校园急救教育起步较晚,存在CPR课程不统一、公众知晓率低、学习途径有限等瓶颈,可借鉴国际经验,推动立法、统一方针政策和行动框架,多联合、多宣传、多投入,从改进课程体系、增加宣传渠道、拓宽学习途径3个方面加以改进。结论通过借鉴欧洲“Kids Save Lives”项目,可推动我国中小学生心肺复苏教育的开展。展开更多
文摘Residential energy-use behavior and energy-saving awareness play a crucial role in sustainable urban energy planning and building energy efficiency,particularly under the pressures of climate change.However,existing studies often lack comparative analysis of urban-rural differences and tend to focus excessively on behavior patterns while neglecting the dimension of energysaving awareness.With China’s urbanization rate reaching 66.16%,understanding such regional disparities has become increasingly important.To address these research gaps,this study conducts a large-scale survey on space cooling behaviors among residents in Beijing,a representative Chinese megacity.It should be noted that living standards in such megacities are generally higher than the national average,which may shape distinctive energy-use profiles.Analyzing 1573valid samples(1064 urban/442 rural)in 2024,this study employed K-Prototypes and K-Modes clustering to identify typical cooling behavior and energy-saving awareness pattems,followed by Kendall/Chi-square correlation tests and XGBoost importance analysis to determine key influencing factors,with subsequent urban-rural comparative analysis.Results indicate that urban residents are primarily heat-sensitive or heat-tolerant,with a secondary patten of mid-low temperature preference,and generally exhibit long cooling durations;rural behavior is dominated by heat-tolerant type,followed by heat-sensitive,mid-low temperature preference,and never-on types as secondary patterns;both urban and rural areas exhibit energy-savingawareness characterized by low consumption-lowwillingness,though urban areas show marginally higher motivation;energy-saving awareness correlates with cooling behavior in rural areas,but this relationship weakens significantly in urban contexts.
文摘As an indispensable part of modern buildings,centralized central air conditioning systems play an important role in maintaining the comfort and air quality of the indoor environment.However,with the increasing energy consumption,how to improve the energy efficiency ratio of air conditioning systems and reduce energy consumption has become an important issue in research and practice.The purpose of this paper is to discuss the impact of humidity control strategies on energy saving in centralized central air conditioning systems,with a view to providing a theoretical basis and practical guidance for realizing building energy efficiency.
基金Supported by National Modern Agricultural Industry Technology System(CARS-06-14.5-A7)Hebei Provincial Agricultural Science and Technology Achievement Transformation Fund Project("Zhangzagu 19"Pilot Test and Demonstration).
文摘[Objectives]This study was conducted to improve the seed production efficiency of water-saving and drought-resistant hybrid millet in production.[Methods]A high-efficiency seed production technology for water-saving and drought-resistant hybrid millet varieties was developed by integrating aspects such as parental line sources,botanical characteristics,biological traits,seed production yield structure,key technical points of seed production,and suitable planting regions.[Results]Under standardized pre-sowing preparation and field management,both parents are simultaneously sown around May 20 with a planting row ratio of 2:6(female:male),a row spacing of 20 cm and plant spacing of 10 cm for the female parent,and a row spacing of 35 cm and plant spacing of 15 cm for the male parent.Both parents are fertilized simultaneously with 375 kg/hm^(2) of urea at the booting stage combined with intertillage or rainfall,and 225 kg/hm^(2) of urea at the grain-filling stage combined with irrigation.Strict hybrid removal,proper pollination and timely harvesting can significantly increase the yield of seed production.[Conclusions]This technology can be fully applied to large-scale seed production of water-saving and drought-resistant hybrid millet,providing seed supply support for cultivation in arid and semi-arid regions.It helps alleviate issues such as excessive groundwater extraction and water scarcity while enhancing planting efficiency,increasing yield,and boosting increase of farmers income.
基金supported by the National Natural Science Foundation of China under Grant No. 62201121the Fundamental Research Funds for Central Universities under Grant No. ZYGX2024XJ070.
文摘Terahertz(THz) and millimeter Wave(mmWave) have been considered as potential frequency bands for 6G cellular systems to meet the need of ultra-high data rates. However, indoor communications could be blocked in THz/mmW cellular systems due to the high free-space propagation loss. Deploying a large number of small base stations indoors has been considered as a promising solution for solving indoor coverage problems. However, base station dense deployment leads to a significant increase in system energy consumption. In this paper, we develop a novel ultra-efficient energy-saving mechanism with the aim of reducing energy consumption in 6G distributed indoor base station scenarios. Unlike the existing relevant protocol framework of 3GPP, which operates the cellular system based on constant system signaling messages(including cell ID, cell reselection information, etc.), the proposed mechanism eliminates the need for system messages. The intuition comes from the observation that the probability of having no users within the coverage area of an indoor base station is high, hence continuously sending system messages to guarantee the quality of service is unnecessary in indoor scenarios. Specifically, we design a dedicated beacon signal to detect whether there are users in the coverage area of the base station and switch off the main communication module when there are no active users for energy saving. The beacon frame structure is carefully designed based on the existing 3GPP specifications with minimal protocol modifications, and the protocol parameters involved are optimized. Simulation results show that the proposed mechanism can reduce the system energy from the order of tens of watts to the order of hundreds of milliwatts. Compared to traditional energy-saving schemes, the proposed mechanism achieves an average energy-saving gain of 58%, with a peak energy-saving gain of 90%.
文摘Getzner Textil AG is always open to new ideas and committed to investment in innovative technological so-lutions.This has proven a highly successful approach for more than two hundred years now:founded in 1818 as a family business in Bludenz in the heart of Europe,the company is now one of the world's leading manufacturers of fabrics for African fashion,shirts and blouses,corporate fashion,and technical textiles,with 1,550 employees,710 weaving machines,seven locations,and an output of 73 million running meters per year.
基金supported by a Research Grant of Pukyong National University(2023)。
文摘Extensive changes in land cover and energy use resulting from urbanization lead to an imbalance in urban thermal conditions,making cities more susceptible to the impacts of climate change.Nature-based solutions(NbS)that leverage the cooling effect of green spaces to mitigate urban heat are gaining attention as a way to improve urban sustainability in the face of climate change.The study evaluated the urban-scale application of NbS's impacts on heat mitigation capacity,air temperature,cooling energy,carbon emissions,and carbon sequestration,as well as the resulting economic benefits using the Integrated Valuation of Ecosystem Services and Tradeoffs(InVEST)Urban Cooling Model(UCM).Green roofs as building adaptations,land use adaptations such as the expansion of urban parks and roadside green space,forest restoration,and multiple adaptations,which are combinations of building and land use adaptations,were considered applicable NbS.Cool roofs were also studied to compare their effects with other urban green infrastructure.The results showed that simultaneously implementing the multiple adaptation methods is the most effective if the applicable areas are sufficient.Considering the implemented area ratio,urban parks are the most effective single adaptive measure,with energy savings of 14.75,8.63,and 1.98 times higher than those of 100%green roofs,cool roofs,and 20%roadside green space expansions,respectively.Restoring forests(21.29 km^(2))can yield 4.7 times higher energy savings than installing 100%green roofs(62 km^(2)).In contrast,deforestation loses more energy and carbon than cool roofs can save.This study can help provide an appropriate strategy for achieving urban carbon neutrality by reducing carbon emissions and increasing carbon sequestration through NbS in addition to relieving urban temperatures.
文摘Construction engineering plays a vital role in urban development,especially as the pace of modern progress continues to accelerate.The widespread use of energy-saving and green environmental protection building materials in this field not only brings convenience to daily life but also promotes the scientific,sustainable,and stable development of construction projects.These materials significantly extend the service life of buildings while supporting environmental protection efforts.This paper explores the practical application value of energy-saving and environmentally friendly building materials in construction engineering,outlines the key application principles,and analyzes their specific types and usage requirements.The aim is to provide a valuable reference for future research and practical implementation.
文摘At the forthcoming IGATEX textile machinery exhibition inKarachi,Pakistan,from April 24-26,Monforts will highlight thebenefits of its latest Universal Energy Tower.This stand-aloneair/air heat exchanger module enables recovery of the heatfrom the exhaust air flow of thermal systems such as existingstenters and THERMEX dyeing ranges with infrared predriers,resulting in energy savings of up to 25%,depending on the ex-haust air volume and operating temperature.
文摘目的介绍欧洲“Kids Save Lives(儿童拯救生命)”项目的实践经验,为我国中小学生心肺复苏教育的开展提供参考,让中小学生从小掌握CPR技能,进而提高旁观者CPR率、提高院外心跳骤停的存活率,并从小培养公民的社会责任感。方法梳理欧洲心肺复苏急救教育项目“Kids Save Lives”的提出背景及欧洲各国的最佳实践,总结我国学校急救教育现状,对我国中小学生心肺复苏急救教育提出建议。结果我国校园急救教育起步较晚,存在CPR课程不统一、公众知晓率低、学习途径有限等瓶颈,可借鉴国际经验,推动立法、统一方针政策和行动框架,多联合、多宣传、多投入,从改进课程体系、增加宣传渠道、拓宽学习途径3个方面加以改进。结论通过借鉴欧洲“Kids Save Lives”项目,可推动我国中小学生心肺复苏教育的开展。
