针对航空电缆电弧故障因特征隐蔽性和危害性强引发的飞行安全隐患等问题提出一种新型检测方法。首先参考行业标准模拟飞行环境搭建试验平台完成数据采集。再采用北方苍鹰算法优化自适应噪声完备集合经验模态分解方法(Complete Ensemble ...针对航空电缆电弧故障因特征隐蔽性和危害性强引发的飞行安全隐患等问题提出一种新型检测方法。首先参考行业标准模拟飞行环境搭建试验平台完成数据采集。再采用北方苍鹰算法优化自适应噪声完备集合经验模态分解方法(Complete Ensemble Empirical Mode Decomposition with Adaptive Noise,CEEMDAN)将故障电弧电流分解为不同本征模态函数分量并对其提取多尺度模糊熵、时域、频域组合特征。最后设计秃鹰搜索-随机森林算法(Bald Eagle Search and Random Forest,BES-RF)进行电弧故障检测,结果表明:检测准确率达98.05%,相比传统分解方法与检测算法准确率提高3.5%、4.7%,验证该方法的有效性。展开更多
Cigarette smoking has known negative effects on physical and mental health. Over 16 million Americans suffer from smoking-related illnesses, and one-third of individuals with mental health issues are also cigarette sm...Cigarette smoking has known negative effects on physical and mental health. Over 16 million Americans suffer from smoking-related illnesses, and one-third of individuals with mental health issues are also cigarette smokers. Both physical and mental health are associated with measures of overall quality of life, a critical outcome that can influence treatment, intervention, and prevention decision-making. However, the direct relation between smoking and quality of life is not clear and requires further investigation. The present study utilized data from 34,309 adults who participated in Wave 5 of the Population Assessment of Tobacco and Health (PATH) to examine the relation between smoking and quality of life while considering the mediating effects of physical and mental health, and the moderating effect of social satisfaction. Using Conditional Process Analyses to integrate mediation and moderation approaches, the present study found that smoking had indirect associations with quality of life mediated through both physical and mental health and that social satisfaction moderated these relationships. Additionally, smoking had an independent direct effect on quality of life that was not moderated by social satisfaction. Results suggest the negative impacts associated with smoking reach beyond its effect on physical, social and mental well-being.展开更多
This study aimed to alert people that the harmony between human beings and nature has already become an urgent problem. All people are responsible for maintaining the harmony, which is the also the inexorable trend of...This study aimed to alert people that the harmony between human beings and nature has already become an urgent problem. All people are responsible for maintaining the harmony, which is the also the inexorable trend of historical development. Reviewing the evolution history of human kind, the relationship between human beings and nature from harmony to imbalance, from imbalance to a new harmony was analyzed from the macro perspective, and it was pointed out that the present society is in the transitional phase from imbalance to a new harmony and also a phase that people are consciously coordinating their relationship with nature. It was found through the study that a harmonious society relies on the harmony between human beings and nature, and the latter is a necessary condition for a real harmonious society, however, people always forget such a principle. The imbalanced relationship between human beings and nature has seriously influenced many aspects of social harmony, and become instable factors in China and international society, even threatened the development and survival of human beings. Thus, all people should make joint efforts in creating win-win conditions for the development between human beings and nature, and ensuring offspring a healthy and green earth.展开更多
Objective: To examine the relationship between emotional well-being, patient activation and social support in a cohort of adults with severe obesity who underwent gastric bypass surgery from January to December 2012. ...Objective: To examine the relationship between emotional well-being, patient activation and social support in a cohort of adults with severe obesity who underwent gastric bypass surgery from January to December 2012. Design: Cross-sectional survey. Subjects: Of a total population of 129 people, aged 18 - 68 years, at a local hospital in central Norway, 64 (50%) responding to the questionnaire, 52 (81%) being women. Main Outcome Measures: The World Health Organization—Five Well-Being Index (WHO-5), the 13-item Patient Activation Measure (PAM-13), a 16-item instrument on the frequency and content of social support, and demographic and clinical data. Results: A significant positive association was found between higher level of patient activation and better emotional well-being (P = 0.02) in linear regression analysis. A higher level of family support was significantly associated with better emotional well-being (practical social support from the family (P = 0.04), emotional social support from family (P = 0.01) and from friends (P = 0.005)). Conclusion: Screening tools for emotional well-being should be used systematically in postoperative consultations to recognize those who need a more individually tailored post-surgery follow-up care after gastric bypass surgery. In addition, health care providers in both specialist and primary health care settings should consider assessing the level of social support as part of regular follow-up routines.展开更多
Objective:To evaluate psychometric properties of the Index of Well-being in a sample of Chinese college students. Methods: A total of 629 subjects were administered the Index of Well-being, State-Trait Anxiety Invento...Objective:To evaluate psychometric properties of the Index of Well-being in a sample of Chinese college students. Methods: A total of 629 subjects were administered the Index of Well-being, State-Trait Anxiety Inventory, and Symptom Checklist-90. Results: Significant gender difference was found on the index of well-being. There was also significant correlation between index of well-being and negative emotionality. Index of Well-being was negatively correlated with factor scores of emotionality including state anxiety, trait anxiety, and SCl-90-depression. Conclusion:The "Index of Well-being”is psychometrically sound for application to Chinese college students.展开更多
为确保发电系统可靠运行,将电池储能装置接入风电场,构建风储混合电站。基于Wellbeing理论,采用序贯蒙特卡洛模拟分析可靠性,得到系统的健康概率、边界概率与风险概率。分析中严格限制电池不完整充放电循环,并且设置2种电池运行策略,控...为确保发电系统可靠运行,将电池储能装置接入风电场,构建风储混合电站。基于Wellbeing理论,采用序贯蒙特卡洛模拟分析可靠性,得到系统的健康概率、边界概率与风险概率。分析中严格限制电池不完整充放电循环,并且设置2种电池运行策略,控制电池充放电行为。基于IEEE Roy Billinton测试系统(RBTS)的仿真结果表明:电池储能设备的接入可以显著提高含风电场发电系统的可靠性;优化的电池运行策略降低了系统的风险概率,并且显著提高了系统运行舒适度;风电场配置合适容量的电池可在确保可靠性的基础上提高经济性;采用基于Well-being理论的可靠性指标,对含储能装置发电系统的可靠性分析具有一定的优势。展开更多
基于Well-being理论对风储混合电力系统进行了充裕度评估。所采用的Well-being充裕度指标中考虑了N-1确定性准则,不仅能计及发电系统的充裕性,还能计及输电系统的充裕性,因此更加合理且适用于发输电系统的充裕度评估。以简单的RBTS(Roy ...基于Well-being理论对风储混合电力系统进行了充裕度评估。所采用的Well-being充裕度指标中考虑了N-1确定性准则,不仅能计及发电系统的充裕性,还能计及输电系统的充裕性,因此更加合理且适用于发输电系统的充裕度评估。以简单的RBTS(Roy Billinton test system)以及规模稍大的IEEE-RTS79为算例,仿真分析了风电及电池储能系统(battery energy storage system,BESS)并网对电力系统充裕度的影响。结果表明,与风电场的集中布置相比,分散布置更有利于系统的充裕性;BESS对含风电场的电力系统充裕度提升作用明显,在电力系统瞬时备用控制中具有重要的作用。展开更多
文摘针对航空电缆电弧故障因特征隐蔽性和危害性强引发的飞行安全隐患等问题提出一种新型检测方法。首先参考行业标准模拟飞行环境搭建试验平台完成数据采集。再采用北方苍鹰算法优化自适应噪声完备集合经验模态分解方法(Complete Ensemble Empirical Mode Decomposition with Adaptive Noise,CEEMDAN)将故障电弧电流分解为不同本征模态函数分量并对其提取多尺度模糊熵、时域、频域组合特征。最后设计秃鹰搜索-随机森林算法(Bald Eagle Search and Random Forest,BES-RF)进行电弧故障检测,结果表明:检测准确率达98.05%,相比传统分解方法与检测算法准确率提高3.5%、4.7%,验证该方法的有效性。
文摘Cigarette smoking has known negative effects on physical and mental health. Over 16 million Americans suffer from smoking-related illnesses, and one-third of individuals with mental health issues are also cigarette smokers. Both physical and mental health are associated with measures of overall quality of life, a critical outcome that can influence treatment, intervention, and prevention decision-making. However, the direct relation between smoking and quality of life is not clear and requires further investigation. The present study utilized data from 34,309 adults who participated in Wave 5 of the Population Assessment of Tobacco and Health (PATH) to examine the relation between smoking and quality of life while considering the mediating effects of physical and mental health, and the moderating effect of social satisfaction. Using Conditional Process Analyses to integrate mediation and moderation approaches, the present study found that smoking had indirect associations with quality of life mediated through both physical and mental health and that social satisfaction moderated these relationships. Additionally, smoking had an independent direct effect on quality of life that was not moderated by social satisfaction. Results suggest the negative impacts associated with smoking reach beyond its effect on physical, social and mental well-being.
文摘This study aimed to alert people that the harmony between human beings and nature has already become an urgent problem. All people are responsible for maintaining the harmony, which is the also the inexorable trend of historical development. Reviewing the evolution history of human kind, the relationship between human beings and nature from harmony to imbalance, from imbalance to a new harmony was analyzed from the macro perspective, and it was pointed out that the present society is in the transitional phase from imbalance to a new harmony and also a phase that people are consciously coordinating their relationship with nature. It was found through the study that a harmonious society relies on the harmony between human beings and nature, and the latter is a necessary condition for a real harmonious society, however, people always forget such a principle. The imbalanced relationship between human beings and nature has seriously influenced many aspects of social harmony, and become instable factors in China and international society, even threatened the development and survival of human beings. Thus, all people should make joint efforts in creating win-win conditions for the development between human beings and nature, and ensuring offspring a healthy and green earth.
文摘Objective: To examine the relationship between emotional well-being, patient activation and social support in a cohort of adults with severe obesity who underwent gastric bypass surgery from January to December 2012. Design: Cross-sectional survey. Subjects: Of a total population of 129 people, aged 18 - 68 years, at a local hospital in central Norway, 64 (50%) responding to the questionnaire, 52 (81%) being women. Main Outcome Measures: The World Health Organization—Five Well-Being Index (WHO-5), the 13-item Patient Activation Measure (PAM-13), a 16-item instrument on the frequency and content of social support, and demographic and clinical data. Results: A significant positive association was found between higher level of patient activation and better emotional well-being (P = 0.02) in linear regression analysis. A higher level of family support was significantly associated with better emotional well-being (practical social support from the family (P = 0.04), emotional social support from family (P = 0.01) and from friends (P = 0.005)). Conclusion: Screening tools for emotional well-being should be used systematically in postoperative consultations to recognize those who need a more individually tailored post-surgery follow-up care after gastric bypass surgery. In addition, health care providers in both specialist and primary health care settings should consider assessing the level of social support as part of regular follow-up routines.
文摘Objective:To evaluate psychometric properties of the Index of Well-being in a sample of Chinese college students. Methods: A total of 629 subjects were administered the Index of Well-being, State-Trait Anxiety Inventory, and Symptom Checklist-90. Results: Significant gender difference was found on the index of well-being. There was also significant correlation between index of well-being and negative emotionality. Index of Well-being was negatively correlated with factor scores of emotionality including state anxiety, trait anxiety, and SCl-90-depression. Conclusion:The "Index of Well-being”is psychometrically sound for application to Chinese college students.
文摘为确保发电系统可靠运行,将电池储能装置接入风电场,构建风储混合电站。基于Wellbeing理论,采用序贯蒙特卡洛模拟分析可靠性,得到系统的健康概率、边界概率与风险概率。分析中严格限制电池不完整充放电循环,并且设置2种电池运行策略,控制电池充放电行为。基于IEEE Roy Billinton测试系统(RBTS)的仿真结果表明:电池储能设备的接入可以显著提高含风电场发电系统的可靠性;优化的电池运行策略降低了系统的风险概率,并且显著提高了系统运行舒适度;风电场配置合适容量的电池可在确保可靠性的基础上提高经济性;采用基于Well-being理论的可靠性指标,对含储能装置发电系统的可靠性分析具有一定的优势。
文摘基于Well-being理论对风储混合电力系统进行了充裕度评估。所采用的Well-being充裕度指标中考虑了N-1确定性准则,不仅能计及发电系统的充裕性,还能计及输电系统的充裕性,因此更加合理且适用于发输电系统的充裕度评估。以简单的RBTS(Roy Billinton test system)以及规模稍大的IEEE-RTS79为算例,仿真分析了风电及电池储能系统(battery energy storage system,BESS)并网对电力系统充裕度的影响。结果表明,与风电场的集中布置相比,分散布置更有利于系统的充裕性;BESS对含风电场的电力系统充裕度提升作用明显,在电力系统瞬时备用控制中具有重要的作用。
