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Research Characteristics of Thermal Comfort of Urban Block Landscape Based on Knowledge Graph Analysis
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作者 FENG Shutong PENG Li +2 位作者 MA Minghao WANG Zhihao CONG Jing 《Journal of Landscape Research》 2024年第2期42-46,50,共6页
The landscape environment of urban blocks plays a significant role in improving the comfort of urban thermal environment and promoting green and high-quality development.The 342 papers related to the research on the i... The landscape environment of urban blocks plays a significant role in improving the comfort of urban thermal environment and promoting green and high-quality development.The 342 papers related to the research on the impact of urban block landscape environment on thermal comfort in China,collected by CNKI(China National Knowledge Infrastructure)from 2002 to 2022,are used as the research object.Through bibliometric statistical analysis,LLR algorithm,and cluster analysis,the current research status of the impact of urban block landscape environment on thermal comfort in China is analyzed and processed,and its external characteristics are identified.Using the information visualization software CiteSpace,the research topics in the field of the impact of urban block landscape environment on thermal comfort are presented in the form of knowledge graphs.Through co-occurrence analysis of keywords and trend of word frequency changes,the development trends of research hotspots and cutting-edge fields of the impact of urban block landscape environment on thermal comfort are determined,hoping to provide reference for future research in this field. 展开更多
关键词 Urban block landscape environment Thermal comfort CiteSpace visualization analysis Research hotspots Research frontiers
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Optimisation of Thermal Comfort of Building in a Hot and Dry Tropical Climate: A Comparative Approach between Compressed Earth/Concrete Block Envelopes
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作者 Arnaud Louis Sountong-Noma Ouedraogo Césaire Hema +2 位作者 Sjoerd Moustapha N’guiro Philbert Nshimiyimana Adamah Messan 《Journal of Minerals and Materials Characterization and Engineering》 2024年第1期1-16,共16页
Compressed earth blocks (CEB) are an alternative to cement blocks in the construction of wall masonry. However, the optimal architectural construction methods for adequate thermal comfort for occupants in hot and arid... Compressed earth blocks (CEB) are an alternative to cement blocks in the construction of wall masonry. However, the optimal architectural construction methods for adequate thermal comfort for occupants in hot and arid environments are not mastered. This article evaluates the influence of architectural and constructive modes of buildings made of CEB walls and concrete block walls, to optimize and compare their thermal comfort in the hot and dry tropical climate of Ouagadougou, Burkina Faso. Two identical pilot buildings whose envelopes are made of CEB and concrete blocks were monitored for this study. The thermal models of the pilot buildings were implemented in the SketchUp software using an extension of EnergyPlus. The models were empirically validated after calibration against measured thermal data from the buildings. The models were used to do a parametric analysis for optimization of the thermal performances by simulating plaster coatings on the exterior of walls, airtight openings and natural ventilation depending on external weather conditions. The results show that the CEB building displays 7016 hours of discomfort, equivalent to 80.1% of the time, and the concrete building displays 6948 hours of discomfort, equivalent to 79.3% of the time. The optimization by modifications reduced the discomfort to 2918 and 3125 hours respectively;i.e. equivalent to only 33.3% for the CEB building and 35.7% for the concrete building. More study should evaluate thermal optimizations in buildings in real time of usage such as residential buildings commonly used by the local middle class. The use of CEB as a construction material and passive means of improving thermal comfort is a suitable ecological and economical option to replace cementitious material. 展开更多
关键词 Compressed Earth Blocks Hot and Dry Climate Thermal comfort Architectural Optimization of Thermal Models Cement Blocks Empirical Validation
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Wearable Inflatable Massage Chair:The Future of Comfort
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作者 Xingyu Tong Yiting Liu Lijuan Liu 《Journal of Electronic Research and Application》 2024年第3期118-124,共7页
With the continuous advancement of science and technology,our lifestyles are undergoing significant changes,with wearable technology emerging as a captivating trend.In this digital era,there is a growing demand for so... With the continuous advancement of science and technology,our lifestyles are undergoing significant changes,with wearable technology emerging as a captivating trend.In this digital era,there is a growing demand for solutions that cater to people’s needs for health and comfort.The wearable inflatable massage chair represents one such innovation designed to meet these evolving needs.This project is focused on creating a“wearable and portable massage chair”that is both convenient and lightweight.It serves as a massage solution particularly beneficial for the elderly and sedentary individuals.This innovative chair can be used by the elderly during outings or errands,as well as by office workers on business trips,while driving,or commuting via subway.Users can simply lean against the seat or a wall,enjoying moments of relaxation amid the busy and fast-paced modern era. 展开更多
关键词 comfortable CONVENIENT INNOVATIVE Relaxing WEARABLE Low cost
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LENTIS Comfort Toric人工晶状体植入术后视觉质量分析
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作者 王丽雯 林松 方石峰 《国际眼科杂志》 CAS 北大核心 2023年第8期1376-1379,共4页
目的:探讨白内障手术中植入LENTIS Comfort Toric人工晶状体后的视觉质量。方法:回顾性对照临床研究,收集数字化导航辅助下白内障超声乳化摘除联合人工晶状体植入术患者40例40眼,植入LENTIS Comfort Toric(MF15T)人工晶状体为A组(24眼)... 目的:探讨白内障手术中植入LENTIS Comfort Toric人工晶状体后的视觉质量。方法:回顾性对照临床研究,收集数字化导航辅助下白内障超声乳化摘除联合人工晶状体植入术患者40例40眼,植入LENTIS Comfort Toric(MF15T)人工晶状体为A组(24眼),植入单焦点Toric人工晶状体为B组(16眼);观察术后3mo不同距离视力、术后散光质心值、脱镜率、离焦曲线变化以及人工晶状体稳定性等。结果:两组患者术后均无严重并发症出现,两组术后3mo远视力无差异(P>0.05);A组中视力、近视力明显优于B组(P<0.01);A组术后脱镜率为99%,B组为45%(P<0.05);两组术后3mo散光质心值均较术前改善,但组间无差异(P>0.05);术后3mo A组离焦曲线于+0.50、-1.75D分别出现峰值,形成平台并平缓下降,B组于+0.25、-0.25D出现峰值后呈陡峭趋势下降。术后1d A组出现1眼(4%)人工晶状体轴位旋转大于10°;B组出现6眼(38%)人工晶状体轴位旋转大于10°,2眼(33%)顺时针旋转,4眼(67%)逆时针旋转;两组均无人工晶状体移位发生。结论:两种人工晶状体均可矫正散光,其中LENTIS Comfort Toric人工晶状体能为白内障合并散光人群提供个性化的选择,可同时解决散光和获得全程视力,术后光学干扰发生率低,稳定性更好,视觉质量及满意度高。 展开更多
关键词 LENTIS comfort Toric人工晶状体 散光矫正 残余散光 视觉质量
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Experimental Mode and Vibration Comfort Analysis of High-Rise Glulam Building Floor Structure
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作者 Yuhang He Rongzhuo Zhang +1 位作者 Yifan Zhang Zheng Wang 《Journal of Renewable Materials》 SCIE EI 2023年第6期2729-2743,共15页
In order to better meet the objective requirements of the use safety of the high-rise glulam building floor structure and the living comfort of the residents,the transient excitation,environmental excitation and frequ... In order to better meet the objective requirements of the use safety of the high-rise glulam building floor structure and the living comfort of the residents,the transient excitation,environmental excitation and frequency spectrum identification methods were used to carry out experimental modal test in-site on the three rooms numbered A,B and C of the same glulam structural building.The three rooms have different functions,different floor sizes and different floor supporting structures.The research results have shown that the first-order bending frequency of the floor structure of Room A is 27.50 Hz,the transverse second-order bending frequency is 34.75 Hz,the longitudinal second-order bending frequency is 53.25 Hz,and the first-order torsional frequency is 56.25 Hz.The reinforced wooden beam at the bottom of the floor of Room A increases the transverse stiffness of the floor structure,but does not offset the anisotropy caused by the longitudinally installed glulam floors.The fundamental frequency values of the floor structures of the three rooms numbered A,B,and C are 27.5,13 and 18 Hz,respectively.This has a relatively high innovation and reference significance for integrating the theory of structural dynamic characteristics with the dynamic testing technology,improving the design level of high-rise glulam structure buildings,and improving the living comfort of residents. 展开更多
关键词 Glulam building wooden floor experimental mode vibration comfort fundamental frequency
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Nurse Care and Comfort in the Puerperium of Girls/Women: Protocol for a Scoping Review
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作者 Juliana Fernandes da Nóbrega Stefhanie Conceição de Jesus +2 位作者 Tifany Colomé Leal Adaucto Wanderley da Nóbrega Junior Maria de Lourdes de Souza 《Open Journal of Nursing》 2023年第7期444-454,共11页
Purpose: Carrying out a scoping review to fill gaps in current knowledge regarding comfort needs in the care provided by nurses to girls/women who experience puerperium. Methods: The procedures guided by the Joanna Br... Purpose: Carrying out a scoping review to fill gaps in current knowledge regarding comfort needs in the care provided by nurses to girls/women who experience puerperium. Methods: The procedures guided by the Joanna Briggs Institute will be applied. The searches will be carried out in the Medical Literature Analysis and Retrieval System Online, Excerpta Medica Database, Cumulative Index to Nursing and Allied Health Literature, Cochrane Library, Scopus, Web of Science, Latin American and Caribbean Health Sciences Literature, Nursing Database, Scientific Electronic Library databases. Studies which are available in full and published in English, Spanish or Portuguese will be selected. There will be no restrictions to the study design or time frame. Two reviewers will independently screen all citations with the aid of software. The degree of agreement between the researchers will be verified by statistics that measure reliability. Through narrative descriptions, charts, and tables, we will present the results obtained. Data analysis will involve descriptive statistics, and qualitative evaluation. We will use the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews checklist to review and write this review. Conclusion: We will summarize the main information available in the literature on the subject, aiming to obtain an overview of the practices employed, and the gaps present in knowledge that require greater attention from the scientific community. 展开更多
关键词 PUERPERIUM Adolescent Health Maternal Mortality Nursing Care comfort
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Does orthotics use improve comfort,speed,and injury rate during running?A randomised control trial
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作者 Alice E Fortune Jonathan M G Sims George Ampat 《World Journal of Orthopedics》 2023年第5期348-361,共14页
BACKGROUND Running is a hugely popular sport.Unfortunately,running-related injury(RRI)rates are high,particularly amongst amateur and recreational runners.Finding ways to reduce RRI rates and maximise comfort and perf... BACKGROUND Running is a hugely popular sport.Unfortunately,running-related injury(RRI)rates are high,particularly amongst amateur and recreational runners.Finding ways to reduce RRI rates and maximise comfort and performance for runners is important.Evidence regarding whether orthotics can successfully improve these parameters is limited and contradicting.Further research is required to provide runners with clearer guidance on the usefulness of orthotics.AIM To investigate the effect of Aetrex Orthotics on comfort,speed and RRI rates during recreational running.METHODS One hundred and six recreational runners were recruited on a voluntary basis via running clubs and social media pages and randomised into either the intervention or control group.Participants in the intervention group ran with Aetrex L700 Speed Orthotics inserted in their usual running shoes,whilst participants in the control group ran in their usual running shoes with no orthotics.The study ran for an 8-wk period.Participants provided data relating to running comfort,distance,and time during weeks 3-6.Participants provided data relating to any RRIs they sustained during all 8 wks.Running distance and time were used to calculate running speed in miles per hour(mph).For each outcome variable,95%confidence intervals and P values were calculated to assess the statistical significance between the groups.For comfort and speed data,univariate multi-level analysis was performed,and for outcome variables with significant between group differences,multi-level multivariate analysis was performed to evaluate any confounding effects of gender and age.RESULTS Ninety-four participants were included in the final analysis(drop-out rate=11%).Comfort and speed from 940 runs and 978 injury data reports were analysed.Participants who ran with orthotics reported,on average,speeds 0.30 mph faster(P=0.20)and comfort scores 1.27 points higher(P≤0.001)than participants who ran with no orthotics.They were also 2.22 times less likely to sustain an injury(P=0.08)than participants who ran with no orthotics.However,findings were only significant for comfort and not for speed or injury rates.Age and gender were found to be significant predictors of comfort.However,the improvements in comfort reported by participants who ran with orthotics were still significant after adjusting for age and gender.CONCLUSION This study found orthotics to improve comfort and speed and prevent RRIs whilst running.However,these findings were only statistically significant for comfort. 展开更多
关键词 Running Foot orthoses Running related injuries PAIN Patient comfort Athletic performance
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Impact of Street Built Environment on Human Thermal Comfort in Summer
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作者 LI Haocheng YANG Xin 《Journal of Landscape Research》 2023年第4期1-5,共5页
With the continuous intensification of the global greenhouse effect,thermal comfort has become a highly concerned issue in the living environment.The study explores the influencing factors and improvement strategies o... With the continuous intensification of the global greenhouse effect,thermal comfort has become a highly concerned issue in the living environment.The study explores the influencing factors and improvement strategies of urban street thermal comfort.The urban heat island effect,environmental parameters,building layout,and green planting all have a significant impact on the thermal comfort of streets.Improvement strategies include optimizing cultivating pattern of plants,adjusting street layout,and improving paving materials of road.The multi-layer vegetation structure provides green shade,reduces local temperature,and humidifies the surrounding environment.It should adjust the street orientation and aspect ratio to provide sunlight and ventilation,and reduce ambient temperature.Paving materials with low reflectivity and light color and permeable underlying surface should be chosen to reduce heat absorption,increase shading and greenery,and improve thermal comfort. 展开更多
关键词 Street built environment MICROCLIMATE Thermal environment Thermal comfort
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Comfortable Travel to Sichuan,the First Bend of the Yellow River
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作者 Li Caicai 《China & The World Cultural Exchange》 2023年第9期24-25,共2页
During the Yellow River Tourism Overseas Promotion Season 2023,Sichuan Province displayed the rich and vivid cultural and tourism image of the part of the Yellow River in Sichuan,specifically the cultural and tourism ... During the Yellow River Tourism Overseas Promotion Season 2023,Sichuan Province displayed the rich and vivid cultural and tourism image of the part of the Yellow River in Sichuan,specifically the cultural and tourism resources of 2 prefectures and 5 counties in Sichuan where the Yellow River flows,fully demonstrating the beautiful scenery of Sichuan. 展开更多
关键词 comfort BEAUTIFUL TOURISM
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Effect of internet multiple linkage mode-based extended care combined with in-hospital comfort care on colorectal cancer patients undergoing colostomy
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作者 Li Xu Mei-Zhen Zhou 《World Journal of Gastrointestinal Surgery》 SCIE 2023年第9期1959-1968,共10页
BACKGROUND Patients with colorectal cancer may need postoperative nursing to improve prognosis,and conventional nursing is not effective.Clinical research is needed to explore nursing methods that can more effectively... BACKGROUND Patients with colorectal cancer may need postoperative nursing to improve prognosis,and conventional nursing is not effective.Clinical research is needed to explore nursing methods that can more effectively improve postoperative conditions on colorectal cancer patients undergoing colostomy.AIM To explore the effect of internet multiple linkage mode-based extended care combined with in-hospital comfort care on colorectal cancer patients undergoing colostomy.METHODS Data from 187 patients with colostomy treated in our hospital from May 2019 to March 2022 were collected and divided into three groups,A(n=62),B(n=62)and C(n=63),according to different intervention methods.Group A received internet multiple linkage mode-based extended care combined with in-hospital comfort care.Group B received internet multiple linkage mode-based extended care.Group C received usual care intervention.Complications were compared among the three groups.The stoma self-efficacy scale,Hamilton Anxiety Scale,RESULTS The complication rate of group A,B and C(16.13%,20.97%and 60.32%,respectively)was significantly different(all P<0.05).The incidence of complications in groups A and B was lower than that in group C,and there was no significant difference between groups A and B(P>0.05).After intervention,the scores of ostomy care,social contact,diet choice,confidence in maintaining vitality,confidence in self-care of ostomy,confidence in sexual life,confidence in sexual satisfaction and confidence in physical labor in the three groups were all higher than before intervention,and the scores of groups A and B were higher than those of group C,with statistical significance(P<0.05).The Hamilton Anxiety Scale and Hamilton Depression Scale scores of the three groups after intervention were lower than those before intervention.The scores of groups A and B were lower than those of group C,and the score of group A was lower than that of group B,all with statistical significance(all P<0.05).There was a statist-ically significant difference in cancer-induced fatigue among the three groups(P<0.05).After intervention,the scores of physical health,psychological health,social health and mental health of the three groups were lower than before the intervention.The scores of group A and B were lower than that of group C;and the score of group A was lower than that of group B,all with statistical significance(all P<0.05).CONCLUSION Internet multiple linkage mode-based extended care combined with in-hospital comfort care can effectively improve self-efficacy,bad mood,cancer-related fatigue and life quality of colorectal cancer patients undergoing colostomy. 展开更多
关键词 Internet multiple linkage mode Extended care In-hospital comfort care Colorectal cancer patients Patients undergoing colostomy
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A Modest But Comfortable Life
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作者 ZUO ZUOFEI 《ChinAfrica》 2023年第12期56-57,共2页
It’s been 10 days since I arrived in Eritrea,and during this time,I have been staying at the Midian Hotel in its capital,Asmara.Despite being a hotel,there was no water for shower,so I had to make do with sleeping fu... It’s been 10 days since I arrived in Eritrea,and during this time,I have been staying at the Midian Hotel in its capital,Asmara.Despite being a hotel,there was no water for shower,so I had to make do with sleeping fully clothed.During the stay of more than 10 days. 展开更多
关键词 fully comfort SPITE
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Evaluation of the Effect of Comfort Nursing on Patients with Chronic Obstructive Pulmonary Disease Complicated with Respiratory Failure
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作者 Ping Wu 《Journal of Clinical and Nursing Research》 2023年第6期18-23,共6页
Objective:To explore and analyze the effect of comfort nursing in patients with chronic obstructive pulmonary disease(COPD)complicated with respiratory failure.Methods:60 patients with COPD and respiratory failure who... Objective:To explore and analyze the effect of comfort nursing in patients with chronic obstructive pulmonary disease(COPD)complicated with respiratory failure.Methods:60 patients with COPD and respiratory failure who were admitted to the Department of Respiratory Medicine of our hospital from May 2020 to May 2023 were selected as subjects of this study,and they were divided into comfort group and reference group by odd and even number draw method,with 30 cases in each group.The comfort group received comfort nursing,and the reference group received general nursing.The lung function performance and living conditions were compared between the groups.Results:Before the intervention,there was no statistically significant difference(P>0.05)in terms of lung functions such as forced expiratory volume in the first second(FEV1),forced vital capacity(FVC),and the ratio FEV1/FVC between the groups;after the intervention,the lung functions of the comfort group were significantly better than those in the reference group(P<0.05).Before the intervention,there was no statistically significant difference(P>0.05)between the groups in terms of mental state,physical function,social situation,and spiritual aspects;after the intervention,the mental state,physical function,social situation,and spiritual aspects of the comfort group were significantly better than those of the reference group(P<0.05).Conclusion:Comfort nursing care for COPD patients with respiratory failure can improve their lung function and quality of life,and achieve ideal nursing effects. 展开更多
关键词 comfort care Chronic obstructive pulmonary disease Respiratory failure
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The Effect of Comfort Nursing on the Compliance and Efficacy of Treatment for Children with Acute Otitis Media Caused by Upper Respiratory Tract Infection
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作者 Jing Xu Jun Qian 《Journal of Clinical and Nursing Research》 2023年第6期78-82,共5页
Objective:To explore and analyze the clinical effect of comfort nursing on children with acute otitis media.Methods:62 children with acute otitis media caused by upper respiratory tract infection who visited the outpa... Objective:To explore and analyze the clinical effect of comfort nursing on children with acute otitis media.Methods:62 children with acute otitis media caused by upper respiratory tract infection who visited the outpatient clinic of our hospital from June 2022 to June 2023 were selected for this study.They were divided into a study group(n=31)and a control group(n=31).Children in the control group received basic care,while children in the study group received comfort nursing along with basic care.The hearing thresholds,body temperature,treatment compliance,and nursing satisfaction of the two groups of children were compared.Results:After the nursing intervention,the hearing threshold and average body temperature of the children in the study group were lower than those in the control group(P<0.05);the treatment compliance of the children in the study group was higher than that in the control group(P<0.05);the nursing satisfaction of the study group was higher than that of the control group(P<0.05).Conclusion:Comfort nursing can improve the treatment effect,treatment compliance,and nursing satisfaction of children with children with acute otitis media caused by upper respiratory tract infection. 展开更多
关键词 comfort nursing Upper respiratory tract infection Acute otitis media
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共享汽车驾驶员适宜H点和座椅参数实验研究
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作者 王军年 程川泰 +2 位作者 高菲 付铁军 任金东 《汽车工程》 EI CSCD 北大核心 2024年第1期39-49,共11页
共享汽车具有车型统一、用户多变且使用频率高的特点,为提升共享汽车使用效率和驾乘体验,研发一种能根据驾驶员特征自动调节舒适坐姿的智能座椅意义重大。本文针对用户座椅调节存在的主观任意性导致的座椅舒适性问题,结合共享汽车智能... 共享汽车具有车型统一、用户多变且使用频率高的特点,为提升共享汽车使用效率和驾乘体验,研发一种能根据驾驶员特征自动调节舒适坐姿的智能座椅意义重大。本文针对用户座椅调节存在的主观任意性导致的座椅舒适性问题,结合共享汽车智能座椅项目,以座椅H点前后位置、H点高低位置、坐垫角和靠背角4个变量为研究因子进行台架实验,分别研究5th、50th和95th百分位驾驶员的座椅舒适性受座椅参数的影响规律。首先,每个研究因子在参考车型范围内均匀选取3个实验水平,采用正交实验表对实验次数进行简化,确定正交实验须进行的组数并进行正交台架实验。实验人员对每组的座椅舒适性进行主观评价,同时通过压力测量仪和数显角度尺测量实验人员的体压分布信息和关节角度信息;其次,通过聚类分析确定了本文采用的以关节角度为客观参数的主客观舒适性评价体系,通过正交实验分析,得出了不同座椅参数对座椅舒适性的影响存在差异的结论,且随着驾驶员百分位的变化,对座椅舒适性造成影响的参数也在发生变化;最后,对正交实验所得数据进行修正拟合,构建了座椅适宜H点位置预测模型和靠背角度预测模型。 展开更多
关键词 共享汽车 座椅舒适性 正交实验 舒适性评价 预测模型
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人工环境中“舒适”的医学意义——关于舒适与健康的思考
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作者 胡松涛 鹿铭理 +4 位作者 张晓霞 刘国丹 王刚 王海英 李慧 《暖通空调》 2024年第2期11-15,共5页
当今社会,人工环境的营造日渐受到重视。室内环境不仅应满足舒适性的要求,更应考虑其动态变化对人体健康与免疫力的潜在影响。本文以人居环境营造为出发点,结合已有的文献研究与中西医观点,首先列举了外部环境对人体健康及体内环境的影... 当今社会,人工环境的营造日渐受到重视。室内环境不仅应满足舒适性的要求,更应考虑其动态变化对人体健康与免疫力的潜在影响。本文以人居环境营造为出发点,结合已有的文献研究与中西医观点,首先列举了外部环境对人体健康及体内环境的影响,其次介绍了“舒适”营造对提高机体健康水平的作用,最后从宏观上阐述了物理环境中“舒适”对人体健康的医学意义,为本专业同医学的交叉研究提供新思路。 展开更多
关键词 人工环境学 舒适度 医学 人体健康 免疫力
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舒适护理在口腔正畸患者护理中的应用效果分析
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作者 季琦 姚玉娟 +2 位作者 周翠丽 陆娟娟 林燕 《中国社区医师》 2024年第12期103-105,共3页
目的:分析舒适护理在口腔正畸患者护理中的应用效果。方法:选取2022年1—6月于南京医科大学附属口腔医院颞颌关节与颌面疼痛科行口腔正畸的患者80例作为研究对象,随机分为对照组与观察组,各40例。对照组实施常规护理,观察组实施舒适护... 目的:分析舒适护理在口腔正畸患者护理中的应用效果。方法:选取2022年1—6月于南京医科大学附属口腔医院颞颌关节与颌面疼痛科行口腔正畸的患者80例作为研究对象,随机分为对照组与观察组,各40例。对照组实施常规护理,观察组实施舒适护理。比较两组护理效果。结果:护理后,两组各项生活质量评分及舒适度评分高于护理前,且观察组高于对照组,差异有统计学意义(P<0.05)。观察组满意度及口腔卫生优良率高于对照组,差异有统计学意义(P<0.05)。结论:舒适护理应用于口腔正畸患者护理中的效果显著,能够改善患者口腔卫生状况,提高生活质量、舒适度及满意度。 展开更多
关键词 口腔正畸 舒适护理 舒适度
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异形平面组合空腹夹层板楼盖舒适度实测研究
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作者 卢亚琴 肖同 +3 位作者 马克俭 魏艳辉 王勤征 陈靖 《建筑结构》 北大核心 2024年第7期113-117,112,共6页
利用环境激励,采用时域法模态拟合方法对异形平面组合空腹夹层板楼盖结构进行了现场竖向振动模态测试,得到组合楼盖结构前4阶竖向振型、自振频率、阻尼比等参数,并与有限元软件计算出的振型对比分析;对异形平面组合空腹夹层版楼盖进行6... 利用环境激励,采用时域法模态拟合方法对异形平面组合空腹夹层板楼盖结构进行了现场竖向振动模态测试,得到组合楼盖结构前4阶竖向振型、自振频率、阻尼比等参数,并与有限元软件计算出的振型对比分析;对异形平面组合空腹夹层版楼盖进行6种工况作用下的人致振动加速度时程测试,分别得到各工况下不同测点的加速度时程曲线及相应各测点的加速度峰值。结果表明,现场实测和有限元分析得到的组合空腹夹层板楼盖自振频率均远大于3Hz,且两者误差在5%之内;楼盖阻尼比均小于005;最不利工况下异形组合空腹夹层板楼盖竖向最大加速度峰值为0036m/s2,其自振频率和加速度峰值均满足《高层建筑混凝土结构技术规程》(JGJ 3—2010)和《组合楼板设计与施工规范》(CECS 273—2010)要求,楼盖应用在大跨度异形平面中具有较好的舒适度。 展开更多
关键词 异形平面 组合楼盖 自振频率 加速度峰值 舒适度
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某SUV车辆平顺性建模研究及其悬架参数优化
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作者 文强 陈嘉健 柴牧 《机械设计与制造》 北大核心 2024年第2期50-53,59,共5页
首先,利用多体动力学仿真软件ADAMS/View建立了某SUV车型的整车动力学模型。其次,开展了车辆平顺性实验,利用数据采集装置分别采集了车辆通过粗糙水泥路面及减速带时,车身沿纵向、横向及垂向的振动加速度信号,并通过车辆加速度振动响应... 首先,利用多体动力学仿真软件ADAMS/View建立了某SUV车型的整车动力学模型。其次,开展了车辆平顺性实验,利用数据采集装置分别采集了车辆通过粗糙水泥路面及减速带时,车身沿纵向、横向及垂向的振动加速度信号,并通过车辆加速度振动响应验证了所建车辆模型的准确性。最后,基于ADAMS和isight的联合仿真技术,以提高车辆平顺性及稳定性为目标,采用多岛遗传算法对车辆前、后悬架刚度及阻尼进行多目标优化。优化后所得车辆悬架参数不仅能提高车辆平顺性,且有限改善了车辆行驶稳定性,较好解决了车辆行驶过程中平顺性及稳定性之间的矛盾。 展开更多
关键词 ADAMS ISIGHT 悬架 平顺性 稳定性 优化
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《庄子》“适”的审美范畴论
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作者 赵德鸿 《北方论丛》 2024年第3期79-87,共9页
庄子其全部的文本都在表达着适意的人生追求。“适”作为《庄子》的审美范畴,恰恰是庄子最为满意的人生状态,并成为庄子内心深处潜意识的人生理念。本文主要通过“适”的审美范畴分析,梳理庄子对于三种人生选择和生存方式的不同态度。... 庄子其全部的文本都在表达着适意的人生追求。“适”作为《庄子》的审美范畴,恰恰是庄子最为满意的人生状态,并成为庄子内心深处潜意识的人生理念。本文主要通过“适”的审美范畴分析,梳理庄子对于三种人生选择和生存方式的不同态度。一是“适人之适”,二是“自适之适”,三是“忘适之适”。庄子最为崇尚的人生场景即“忘适之适”,这也与其本人一贯崇尚的天地精神一脉相承。 展开更多
关键词 《庄子》 适人之适 自适之适 忘适之适
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大功率拖拉机驾驶室振动仿真与试验验证
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作者 金晓萍 高孟瑜 +2 位作者 毛恩荣 孙晓东 孙厚杰 《农机化研究》 北大核心 2024年第1期247-253,共7页
针对路面不平度引起的拖拉机振动及驾驶员驾驶疲劳等问题,以大功率拖拉机为研究对象,基于车辆动力学理论建立六自由度人-椅-路面拖拉机振动模型,仿真拖拉机动态工况下人椅系统的振动传递过程。为验证模型的准确性,在田间及沥青道路上进... 针对路面不平度引起的拖拉机振动及驾驶员驾驶疲劳等问题,以大功率拖拉机为研究对象,基于车辆动力学理论建立六自由度人-椅-路面拖拉机振动模型,仿真拖拉机动态工况下人椅系统的振动传递过程。为验证模型的准确性,在田间及沥青道路上进行实车试验,测量动态工况下拖拉机座椅及人体头部、腰部、腿部的振动加速度,并与模型仿真结果进行对比;通过加速度响应的时域和频域分析,把加权加速度均方根值作为评价指标,对驾驶员的振动舒适性进行评价分析。结果表明:建立的人椅系统模型与振动试验的结果有很高的一致性,模型具有良好的预测效果,且驾驶员测量部位因振动产生的不舒适感由低到高为头部、腿部、腰部,为拖拉机减振及座椅设计提供了参考。 展开更多
关键词 拖拉机 振动仿真 路面激励 振动舒适性
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