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行业发展行为的系统动力学模型 被引量:9
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作者 龚国华 田圣海 《复旦学报(自然科学版)》 CAS CSCD 北大核心 2001年第2期147-152,共6页
预测行业的未来发展趋势具有很重要的现实意义 ,但由于市场是一个高阶多变量非线性的复杂系统 ,很难用传统的数学和统计工具进行分析 ,而系统动力学由于其本身的特点 ,恰好适合解决此类问题 .由此 ,以彩电行业为例 ,阐述了用系统动力学... 预测行业的未来发展趋势具有很重要的现实意义 ,但由于市场是一个高阶多变量非线性的复杂系统 ,很难用传统的数学和统计工具进行分析 ,而系统动力学由于其本身的特点 ,恰好适合解决此类问题 .由此 ,以彩电行业为例 ,阐述了用系统动力学建立市场模型的过程和方法 。 展开更多
关键词 系统动力学 行业发展模型 市场需求 市场供给 家电行业 行业发展行为
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Influence of Shaving Behavior on Skin Physiological Properties and Sensory Discomfort of Chinese Men
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作者 Xia Xue llyoung Kwack +3 位作者 Jin Xan Zhang Ping He Quanquan Jaeho Yeon 《China Detergent & Cosmetics》 2017年第4期46-56,共11页
Men's facial skin is ubiquitously affected by their shaving behaviors. Skin physiological parameters and the degree of discomfort were investigated on healthy Chinese male volunteers. The effect of immediate shavi... Men's facial skin is ubiquitously affected by their shaving behaviors. Skin physiological parameters and the degree of discomfort were investigated on healthy Chinese male volunteers. The effect of immediate shaving and long-term shaving was compared, and more parameters such as skin integrity, pigmentation and texture were significantly influenced by long-term shaving. Sensory assessment also showed severer discomfort degree after long-term shaving. The results indicated that long-term shaving has more impact on skin condition than immediate shaving. Furthermore, the skin damage caused by shaving can be relieved by appropriate shaving care habits. 展开更多
关键词 beard hair shaving skin physiology sensory evaluation long term effect shaving care habit
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