共查询到19条相似文献,搜索用时 78 毫秒
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具有超高时间分辨率的事件相关电位(Event-related potentials, ERPs)技术为织物触觉舒适度的大脑感知表征研究提供了新的方法。在国内外文献基础上,归纳了ERPs技术在织物触觉舒适度感知表征中的研究进展,得到与织物轻微触感舒适度和接触压力舒适度感知相关的诱发电位成分分别为P50、P100、P200、P300和N450,并从物理、生理和心理3个方面探讨了将ERPs技术应用于织物舒适度感知过程中需注意的影响因素,为该技术与织物舒适度感知的深度结合提供应用基础。 相似文献
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为探讨组成织物触觉质感多维感知属性空间的维度和意义,基于内隐记忆的语义描述实验,获得表征织物触觉质感的描述符,并研究各描述符出现的频率与平均次序间的关系。在此基础上,借鉴数据挖掘技术中聚类分析与因子分析相结合的算法,从认知科学角度确立表征织物触觉质感的空间维度。聚类分析结果表明,滑爽-粗糙感、柔软-硬挺感以及薄-厚感可作为组成织物触觉质感属性空间的前3维,而第4维与粘涩感有关。通过因子分析证实,前5组因子的累计贡献率约达67.69%,即聚类分析得到的结果可解释触觉质感的主要差异。 相似文献
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功能织物应用的特殊性和原料的高性能 ,决定了功能织物的设计与普通织物的差异 ,本文研究了较为实用的设计方法并给出了参数表达式。 相似文献
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介绍了光致变色织物的变色机理以及其应用范围,详述了E1前光致变色织物主要的生产方法及研究现状,并对光致变色技术今后的研究热点及主要发展方向进行了展望。 相似文献
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通过总结3-6岁学龄前儿童的触觉感知特点以及感知形式,得到触觉感知与儿童家具设计的关系,并以此提出基于触觉感知的儿童家具设计要素和原则,围绕装饰、造型、材质、功能这四个要素展开设计.首先通过趣味性设计(体现在装饰和造型方面)吸引儿童与家具产生互动,其次在互动中通过趣味造型设计、多种材质设计和功能设计刺激儿童的触觉,从而... 相似文献
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Twelve stretchable fabrics are woven in two sets with one set in 50s and 60s 100% cotton in warp and 40s, 50s, and 60s cotton core spun lycra yarn in weft and another set with 2/75 and 2/120?Nm silk in warp with 40s, 50s, and 60s cotton core spun lycra yarn in weft. Hundred percent cotton sari blouse materials commercially available in the market are also included for a comparative study of pressure distribution between cotton core spun lycra fabrics and cotton blouse materials. The influence of fabric specification on total hand value (THV), stretch properties, and pressure comfort is analyzed. The effects of body shape and fabric mechanical properties on garment pressure are also analyzed. The results indicated that the finer counts of cotton core spun lycra woven with cotton and silk to elasticize fabrics provided improved hand feel, stretch, and pressure comfort values. The average pressure value of the samples at the major pressure points with the cotton/cotton core spun lycra samples and silk/cotton core spun lycra samples is lower than 100% cotton samples’ fabric physical properties, stretch properties, mechanical properties, and THV significantly influenced the pressure distribution and comfort of garments. 相似文献
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Two different nuclear magnetic resonance techniques, namely magnetic resonance imaging and 1H-HR-MAS NMR spectroscopy, have been employed to study the extent of the damage caused by relatively low pressures (100–200 MPa) in strawberry. MRI maps showed important changes in the relaxation behavior of water molecules in pressurized samples. These differences increased with the pressure level applied. ADC values clearly showed the destruction of biological barriers and the loss of cell compartments produced by pressure. This induced major water redistribution in the tissues and; therefore, substantial changes in the interactions between water molecules and their environment. Relaxation times in T1 and T2 maps clearly depicted these pressure induced modifications. Moreover, NMR spectroscopy showed significant differences in the main sugars content in control and pressurized samples. Sucrose hydrolysis seems to be enhanced by the pressure treatment.
Industrial relevance
The research data presented in this paper show a deep insight into the phenomena which take place during pressure processing in a soft plant tissue. The Nuclear Magnetic Resonance (NMR) techniques employed offered the opportunity of studying the whole product without any preparative manipulation which could mask the pressure effects. The results obtained should be useful to understand how and why pressure causes damage to vegetal tissues and, therefore, to design optimized high-pressure treatments which minimize this damage. 相似文献14.
为改善旗袍胸部牵制感与压迫感,提高旗袍的胸部压力舒适性,对同一结构规格旗袍的门襟、袖型及穿脱方式进行设计组合,利用正交试验制作旗袍样衣,测试出受试者在规定动作下的主客观压力值,并利用AHP法对主客观数据进行综合分析,得出对旗袍压力舒适性影响最大的设计因素及动作。结果表明,双侧门襟、无袖及前门襟穿脱方式的设计因素可以在一定程度上缓解旗袍胸部牵制感和压迫感,提高穿着舒适性;其中袖型因素服装压力值波动最大,对旗袍胸部压力舒适性影响程度更为显著;而规定动作中双手背后这一动作所占权重最高,对旗袍胸部压力舒适性的影响最大。 相似文献
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The fermentation of bread and cake dough was monitored on-line by two types of volumetric measurements and by magnetic resonance imaging (MRI). The volumetric measurements enabled independent determination of the actual dough volume and the amount of carbon dioxide that permeated out of the dough. MRI allowed us to obtain an insight into the developing dough and to observe the pore structure during proofing. Due to the non-destructive and non-invasive character of the methods, no sample preparation was necessary, and the fermentation process was not influenced by the measurements. Both methods provided results that were in accordance with each other. The data were used to derive formal reaction-kinetic data for the course of the fermentation process in bread and cake doughs. 相似文献
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采用低场核磁共振技术、核磁成像技术和一维空间频率编码技术,研究猪背最长肌在-18℃冻藏0d和1,3,6,9,12,15个月后水分含量和迁移变化规律;并测定猪肉贮藏过程中TVB-N、TBARS、汁液流失率、蛋白质溶解度的变化,将水分变化和品质指标变化进行相关性综合分析。结果表明:猪背最长肌中3种组分的水分分别为:结合水(T_(20))、不易流动水(T_(21))和自由水(T_(22)),随着冻藏时间的延长,肉样中T_(21)组分降低,T_(22)组分增加;MRI表明随着时间的延长,样品水分分布从最初分布均匀到样品边缘信号强,中间部位信号低。随着冻藏时间的再延长,又逐渐恢复均匀状态,15个月后水分分布较均匀;用一维频率编码扫描发现随着冻藏时间的延长,肉中水分的信号量(幅值)逐渐降低;相关性分析结果表明:T_(21)与冻藏时间、TVB-N、TBARS、汁液流失率、蛋白质溶解度都显著相关(P0.05),T_(22)与冻藏时间、TVB-N极显著相关(P0.01),T_(22)与TBARS、汁液流失率、蛋白质溶解度显著相关(P0.05),T_(21)、T_(22)都与肉中品质指标呈现较好的相关性。 相似文献
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为了研究磁性纤维织物中纱线原料和组织结构对织物湿舒适性的影响,扩展功能纤维的应用领域,采用磁性纤维/竹浆/棉混纺比为67/23/10的磁性纤维混纺纱与棉、竹/棉混纺纱进行交织,设计十种不同组织结构的织物,测试织物的透气性、透湿性和导湿性。利用灰色理论体系的灰聚类分析方法对数据结果进行评估,选取湿舒适性最优的织物原料与结构设计方案。结果表明:磁纤维混纺纱与竹纤维纱线分别为经、纬纱的平纹织物夏季湿舒适性最好;磁纤维混纺纱与竹纤维纱线分别为经、纬纱的接结双层织物冬季湿舒适性最好。 相似文献