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Introducing Degree Days to Building Thermal Climatic Zoning in China

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Journal of Thermal Science 2023年第3期32卷 1155-1170页

作者： LIU Yan WEN Zeqiu lyu kailin YANG Liu LIU Jiaping DONG Hong GAO Qinglong State Key Laboratory of Green Building in Western China Xi'an University of Architecture and TechnologyXi'an 710055China School of Architecture Xi'an University of Architecture and TechnologyXi'an 710055China China Academy of Building Research Beijing 100013China China Southwest Architectural Design and Research Institute corp.Ltd. Chengdu 610041China

Building thermal climatic zoning is a key issue in building energy *** degree days(HDD) and cooling degree days(CDD) are often employed as indexes to represent the heating and cooling energy demand in climatic ***,only using degree days may oversimplify the climatic zoning in regions with complex climatic *** the present study,the application of degree days to current building thermal climatic zoning in China was assessed based on performance *** investigate the key indexes for thermal climatic zoning,the climate characteristics of typical cities were analyzed and the relationships between the climate indexes and heating/cooling demand were *** results reveal that the annual cumulative heating load had a linear correlation with HDD 18 only in regions with small differences in ***,HDD is unsuitable for representing the heating demand in regions with large differences in altitude.A comprehensive index(winter climatic severity index) should be employed instead of HDD,or complementary indexes(daily global solar radiation or altitude) could be used to further divide climate *** the current official climatic zoning,the base temperature of 26℃ for CDD is excessively *** appropriate base temperature range is 18℃ to 22℃.This study provides a reference for selecting indexes to improve thermal climatic zoning in regions with similar climates.

关键词： climatic zoning degree days building thermal design base temperature solar radiation

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基于生物气候图的建筑遮阳潜力计算及分区

建筑科学 2023年第12期39卷 120-127,145页

作者：郭莹刘衍杨柳吕凯琳孟祥鑫西部绿色建筑国家重点实验室陕西西安710055 西安建筑科技大学建筑学院陕西西安710055

本研究首先以太阳辐射照度大于240 W/m^(2),室外空气温度高于29℃作为需要遮阳的设计条件,剔除全年均不需要遮阳的台站。从人体热舒适角度出发,基于生物气候图计算我国各个台站在不同气候区人体热适应模型下的过热和过冷时间比,基于此利... 详细信息

本研究首先以太阳辐射照度大于240 W/m^(2),室外空气温度高于29℃作为需要遮阳的设计条件,剔除全年均不需要遮阳的台站。从人体热舒适角度出发,基于生物气候图计算我国各个台站在不同气候区人体热适应模型下的过热和过冷时间比,基于此利用ArcGIS软件完成了全国遮阳潜力的分布趋势,将我国分为6个遮阳设计区:最佳区、适宜Ⅰ区、适宜Ⅱ区、适宜Ⅲ区、不适宜区、最不适宜区。最后,在每个遮阳设计区选取典型城市分析过热期遮阳需求与过冷期采暖需求所占比重,提出遮阳设计建议。该研究完成了不同气候条件下的遮阳和采暖潜力以及需求的量化,为建筑师在建筑设计初期提供遮阳设计指导。

关键词：生物气候图建筑遮阳人体热舒适潜力计算潜力分区

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建筑热工设计分区现状及指标阈值修正

建筑科学 2022年第10期38卷 144-151页

作者：吕凯琳刘衍杨柳董宏高庆龙西部绿色建筑国家重点实验室西安710055 西安建筑科技大学建筑学院西安710055 中国建筑科学研究院有限公司北京100013 四川大学建筑与环境学院成都610000

建筑热工设计分区是建筑热工设计的基础,合理的建筑热工设计分区对指导当地建筑热工设计至关重要。本文基于我国现行GB 50176-2016《民用建筑热工设计规范》中规定的分区方法,采用更新的气象数据与新增台站对全国重新进行了热工区划,并... 详细信息

建筑热工设计分区是建筑热工设计的基础,合理的建筑热工设计分区对指导当地建筑热工设计至关重要。本文基于我国现行GB 50176-2016《民用建筑热工设计规范》中规定的分区方法,采用更新的气象数据与新增台站对全国重新进行了热工区划,并与原有的354个城镇的热工区属进行了对比分析,根据分析结果指出了原有热工分区存在的一些问题,并提出了初步的分区指标阈值修正方案。本研究可为建筑热工分区的完善工作提供基础支持。

关键词：建筑热工设计分区分类算法分区指标

The Internet of Things under Federated Learning:A Review of the Latest Advances and Applications

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Computers, Materials & Continua 2025年第1期82卷 1-39页

作者： Jinlong Wang Zhenyu Liu Xingtao Yang Min Li Zhihan lyu School of Information and Control Engineering Qingdao University of TechnologyQingdao260043China Anhui Province Key Laboratory of Intelligent Building&Building Energy Saving Anhui Jianzhu UniversityHefei230000China Department of Game Design Uppsala UniversityUppsala75310Sweden

With the rapid development of artificial intelligence,the Internet of Things(IoT)can deploy various machine learning algorithms for network and application *** the IoT environment,many sensors and devices generatemassive data,but data security and privacy protection have become a serious *** learning(FL)can achieve many intelligent IoT applications by training models on local devices and allowing AI training on distributed IoT devices without data *** review aims to deeply explore the combination of FL and the IoT,and analyze the application of federated learning in the IoT from the aspects of security and privacy *** this paper,we first describe the potential advantages of FL and the challenges faced by current IoT systems in the fields of network burden and privacy ***,we focus on exploring and analyzing the advantages of the combination of FL on the Internet,including privacy security,attack detection,efficient communication of the IoT,and enhanced learning *** also list various application scenarios of FL on the ***,we propose several open research challenges and possible solutions.

关键词： Federated learning Internet of Things sensors machine learning privacy security

Multi-Stage Voltage Control Optimization Strategy for Distribution Networks Considering Active-Reactive Co-Regulation of Electric Vehicles

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Energy Engineering 2025年第1期122卷 221-242页

作者： Shukang lyu Fei Zeng Huachun Han HuiyuMiao Yi Pan Xiaodong Yuan Electric Power Research Institute State Grid Jiangsu Electric Power Co.Ltd.Nanjing211103China

The high proportion of uncertain distributed power sources and the access to large-scale random electric vehicle(EV)charging resources further aggravate the voltage fluctuation of the distribution network,and the existing research has not deeply explored the EV active-reactive synergistic regulating characteristics,and failed to realize themulti-timescale synergistic control with other regulatingmeans,For this reason,this paper proposes amultilevel linkage coordinated optimization strategy to reduce the voltage deviation of the distribution ***,a capacitor bank reactive power compensation voltage control model and a distributed photovoltaic(PV)activereactive power regulationmodel are ***,an external characteristicmodel of EVactive-reactive power regulation is developed considering the four-quadrant operational characteristics of the *** optimization model of the distribution network is then constructed considering the time-series coupling constraints of multiple types of voltage regulators.A multi-timescale control strategy is proposed by considering the impact of voltage regulators on active-reactive EV energy consumption and PV energy ***,a four-stage voltage control optimization strategy is proposed for various types of voltage regulators with multiple time ***-objective optimization is solved with the improvedDrosophila algorithmto realize the power fluctuation control of the distribution network and themulti-stage voltage control *** results validate that the proposed voltage control optimization strategy achieves the coordinated control of decentralized voltage control resources in the distribution *** effectively reduces the voltage deviation of the distribution network while ensuring the energy demand of EV users and enhancing the stability and economic efficiency of the distribution network.

关键词： Electric vehicle(EV) distribution network multi-stage optimization active-reactive power regulation voltage control

Experimental Study on Energy Storage Characteristics of Sintered Ore Particle Packed Beds

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Journal of Thermal Science 2025年第1期34卷 242-253页

作者： LAI Zhenya DING Liwei lyu Hongkun HOU Chenglong CHEN Jiaying GUO Xutao HAN Gaoyan ZHANG Kang State Grid Zhejiang Electric Power Research Institute State Key Laboratory of Clean Energy Utilization Zhejiang University

The particle packed bed energy storage system has advantages such as low costs and wide temperature ranges,which can be combined with solar thermal power generation systems to solve the inherent volatility and discontinuity of renewable *** new materials with low costs and excellent storage performances is one of the eternal research hotspots in the field of energy *** paper innovatively uses sintered ore particles as energy storage material and studies the effect of particle size on the airflow resistance characteristics,energy storage characteristics,and thermocline evolution characteristics of the packed bed through thermal energy storage *** results indicate that for the particles in the macro scale,the smaller the particle,the lower the absolute permeability of the bed and the greater the airflow *** packed bed with smaller particles has a larger specific surface area,larger bulk mass,and smaller bed ***,the packed beds with smaller particles have better thermocline characteristics,less irreversible loss,and can achieve higher thermal efficiency and higher exergy efficiency in the heat storage *** cycle thermal efficiency in packed beds with 25-40 mm,16-25 mm,and 10-16 mm particles is 53.58%,56.27%,and 57.60%,respectively,and the cycle exergy efficiency is 61.81%,69.25%,and 74.13%,***,this paper also studies the effect of discharging airflow rates on thermal storage *** experimental results indicate that suitable discharging strategies should be selected based on different heat demands.

关键词： airflow resistance particle packed bed thermal energy storage thermocline evolution

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不同统计时长对典型气象年选取结果的影响

工业建筑 2020年第7期50卷 95-100,203页

作者：刘婧李红莲吕凯琳杨柳刘加平西安建筑科技大学建筑学院西安710055 西安建筑科技大学信息与控制工程学院西安710055

为建立我国建筑节能用基础气象数据库,针对我国气象数据实际记录状况,需分析不同统计时长对典型气象年挑选结果的影响。分别在5个建筑热工设计分区的11个二级区划中各选取一个典型城市,采用美国Sandia国家实验室法,对比缩短后的统计时长... 详细信息

为建立我国建筑节能用基础气象数据库,针对我国气象数据实际记录状况,需分析不同统计时长对典型气象年挑选结果的影响。分别在5个建筑热工设计分区的11个二级区划中各选取一个典型城市,采用美国Sandia国家实验室法,对比缩短后的统计时长(3~15 a)和长期30 a挑选出的不同典型年结果的差异。结果表明:为了控制辐射标准差的平均波动幅度在1 MJ/m2以内,同时温度标准差的平均波动幅度也在1℃以内,最少要用8 a统计时长的数据,但根据城市位置和气候的不同,仍然会有部分城市的温度或辐射标准差的波动幅度较大。

关键词：建筑能耗模拟典型气象年统计时长建筑热工设计分区 Sandia方法

Genes and proteins expressed at different life cycle stages in the model protist Euplotes vannus revealed by both transcriptomic and proteomic approaches

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Science China Life Sciences 2025年第1期68卷 232-248页

作者： Yaohan Jiang Xiao Chen Chundi Wang Liping lyu Saleh A.Al-Farraj Naomi A.Stover Feng Gao Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education) and Institute of Evolution & Marine Biodiversity Ocean University of China Marine College Shandong University Zoology Department College of ScienceKing Saud University Department of Biology Bradley University Laboratory for Marine Biology and Biotechnology Qingdao Marine Science and Technology Center

Sexual reproduction first appeared in unicellular protists and has continued to be an essential biological process in almost all *** protists, which contain both germline and somatic genomes within a single cell, have evolved a special form of sexual reproduction called conjugation that involves mitosis, meiosis, fertilization, nuclear differentiation, genome rearrangement, and the development of unique cellular structures. The molecular basis and mechanisms of conjugation vary dramatically among ciliates, and many details of the process and its regulation are still largely unknown. In order to better comprehend these processes and mechanisms from an evolutionary perspective, this study provides the first comprehensive overview of the transcriptome and proteome profiles during the entire life cycle of the newly-established marine model ciliate Euplotes vannus. Transcriptome analyses from 14 life cycle stages(three vegetative stages and 11 sexual stages) revealed over 26,000 genes that are specifically expressed at different stages, many of which are related to DNA replication,transcription, translation, mitosis, meiosis, nuclear differentiation, and/or genome rearrangement. Quantitative proteomic analyses identified 338 proteins with homologs associated with conjugation and/or somatic nuclear development in other ciliates, including dicer-like proteins, Hsp90 proteins, RNA polymerase Ⅱ and transcription elongation factors, ribosomal-associated proteins, and ubiquitin-related proteins. Four of these homologs belong to the PIWI family, each with different expression patterns identified and confirmed by RT-qPCR,which may function in small RNA-mediated genome rearrangement. Proteins involved in the nonhomologous end-joining pathway are induced early during meiosis and accumulate in the developing new somatic nucleus, where more than 80% of the germline sequences are eliminated from the somatic genome. A number of new candidate genes and proteins likely t

关键词： sexual reproduction transcriptomic proteomic genome rearrangement PIWI NHEJ

Mechanism of inflammatory response and therapeutic effects of stem cells in ischemic stroke:current evidence and future perspectives

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Neural Regeneration Research 2025年第1期20卷 67-81页

作者： Yubo Wang Tingli Yuan Tianjie lyu Ling Zhang Meng Wang Zhiying He Yongjun Wang Zixiao Li Vascular Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Shanghai Engineering Research Center of Stem Cells Translational Medicine ShanghaiChina National Center for Healthcare Quality Management in Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Institute for Regenerative Medicine Shanghai East HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghaiChina Chinese Institute for Brain Research BeijingChina Research Unit of Artificial Intelligence in Cerebrovascular Disease Chinese Academy of Medical SciencesBeijingChina Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases BeijingChina

Ischemic stroke is a leading cause of death and disability worldwide,with an increasing trend and tendency for onset at a younger ***,in particular,bears a high burden of stroke *** recent years,the inflammatory response after stroke has become a research hotspot:understanding the role of inflammatory response in tissue damage and repair following ischemic stroke is an important direction for its *** review summarizes several major cells involved in the inflammatory response following ischemic stroke,including microglia,neutrophils,monocytes,lymphocytes,and ***,we have also highlighted the recent progress in various treatments for ischemic stroke,particularly in the field of stem cell ***,understanding the complex interactions between inflammation and ischemic stroke can provide valuable insights for developing treatment strategies and improving patient *** cell therapy may potentially become an important component of ischemic stroke treatment.

关键词： cell therapy immune cell inflammatory ischemic stroke stem cell