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反渗透膜经济寿命分析
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作者 李颖 凌霄 《工业安全与环保》 2007年第11期30-31,9,共3页
提出利用反渗透膜的经济寿命解决回用水水质控制不及时和反渗透膜更换浪费的问题。并提出通过应用经济寿命的分析方法来确定出反渗透膜(RO膜)的最佳更换时间。为了使所求得的经济寿命更为准确,RO膜的经济寿命模型中利用电导率和硬度对... 提出利用反渗透膜的经济寿命解决回用水水质控制不及时和反渗透膜更换浪费的问题。并提出通过应用经济寿命的分析方法来确定出反渗透膜(RO膜)的最佳更换时间。为了使所求得的经济寿命更为准确,RO膜的经济寿命模型中利用电导率和硬度对产水量进行回归预测。应用最佳更换时间解决回用水处理过程中可能出现的水质不稳定以及RO膜更换时间不确定而造成运行成本浪费的问题。 展开更多
关键词 经济寿命 回归预测 反渗透膜
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Determination of symptoms associated with hiesho among young females using hie rating surveys
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作者 Hidetoshi Mori Hiroshi Kuge +2 位作者 Shunji Sakaguchi Tim Hideaki Tanaka Junji Miyazaki 《Journal of Integrative Medicine》 SCIE CAS CSCD 2018年第1期34-38,共5页
Objective: Hie (cold sensation) is one of the most well-known health complaints in Japan and elsewhere in East Asia. Those who suffer from severe hie are considered to have hiesho (cold disorder). This study was ... Objective: Hie (cold sensation) is one of the most well-known health complaints in Japan and elsewhere in East Asia. Those who suffer from severe hie are considered to have hiesho (cold disorder). This study was conducted to determine symptoms associated with hie in young females using a survey consisting of the hie scale and hie diary. Methods: Two hundred and seventy-one participants were included for the analysis. Survey forms were distributed to the participants. Diagnosis of hiesho was determined by using the hie scale. A discriminant score of over -0.38 was considered hiesho. The Short Form-8 Health Survey Standard Version (SF-8) was used to measure health-related quality of life (QOL). The participants were also asked to respond to the questionnaire evaluating 14 physical and emotional symptoms, utilizing a six-level Likert scale item. Results: The 1st factor (hie factor) was correlated with hie (r= 0.546), dry mouth (r= 0.332), lower- extremity edema (r = 0.450), headrushes (r=0.470), shoulder stiffness (r = 0.311 ), headrushes with chills (r = 0.726), and fatigue (r= 0.359). Cronbach's α of the 1st factor was 0.748, which indicated reliability between the items. When hie factor was the dependent variable, standardized partial regression coefficient was β=-0.387 for physical component score (P 〈 0.001) and β=-0.243 for mental component score (P 〈 0.001 ). Conclusion: This study indicated that hiesho symptoms among young female adults were associated with bodily pain and general health perceptions of the SF-8 QOL survey. 展开更多
关键词 Cold l:ypersensitivity Questionnaires Health surveys Quality of life regression analysis Reproducibility of results
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