基于DCNN网络及Self-Attention-BiGRU机制的轴承剩余寿命预测

深度神经网络在剩余寿命预测(RUL)领域得到了广泛的应用。传统的滚动轴承寿命预测模型存在预测精确度较低、鲁棒性较弱的问题。为了进一步提升预测模型的精确度以及鲁棒性,提出了一种融合深度卷积神经网络(DCNN)、双向门控循环单元(BiGRU)以及自注意力机制(Self-Attention)三种模块的滚动轴承剩余使用寿命预测模型。首先,利用DCNN网络对原始振动信号的时域特征、频域特征进行了提取;然后,使用不确定量化的方法对提取到的特征进行了评价和筛选,利用筛选过后的特征构建了新的替代特征集;最后,利用Self-Attention-BiGRU网络对轴承的剩余使用寿命进行了预测,并在IEEE PHM2012数据集上进行了验证。实验结果表明:相较于BiGRU、GRU和BiLSTM三种模型的预测结果,基于DCNN及Self-Attention-BiGRU方法的预测结果最优,两项误差值:平均绝对误差(MAE)、均方根误差(RMSE)最低,其中工况一的一号轴承RUL预测的MAE值相较于BiGRU、GRU以及BiLSTM网络分别下降了7.0%、7.4%和6.5%,RMSE值相较于其他三种模型分别下降了7.6%、8.4%和6.9%,预测的Score值最高,分值为0.985。通过不同数据集的划分,证明了该方法在轴承RUL预测时的强鲁棒性。实验结果验证了基于DCNN网络及Self-Attention-BiGRU模型在轴承剩余使用寿命预测中的有效性。

基于并行CNN-Self attention&LSTM的锂电池RUL间接预测

针对锂离子电池难以在线测量直接健康因子(容量、内阻)进行剩余使用寿命(RUL)预测的现状,提出基于并行CNN-Self attention与LSTM组合的锂电池RUL间接预测方法。首先基于锂离子电池放电循环数据,利用灰度关联分析筛选出能够高度体现电池容量衰减的间接健康因子;然后分别对间接健康因子使用卷积神经网络(CNN)进行特征提取和自注意力机制(Self attention)调整特征权重得到对应的特征矩阵;最后融合特征矩阵,并使用长短期记忆(LSTM)网络进行锂电池RUL预测。使用NASA锂离子电池数据集进行实验,结果表明:与传统的CNN、LSTM和CNN-LSTM模型相比,并行CNN-Self attention&LSTM模型所得到的容量衰减曲线更接近实际容量衰减曲线,误差波动范围更小,在RMSE、MAE和R2系数3种评价指标上表现更优。

Meaning in life and well-being of older stroke survivors in Chinese communities: Mediating effects of mastery and self-esteem

The study aims to examine the role of mastery and self-esteem as a potential mediator of the relationship of meaning in life and well-being among older Chinese stroke survivors. A cross-sectional study was conducted in 214 community-dwelling older stroke survivors (128 men and 86 women), ranging from 60 years to 88 years old. The meaning in life, mastery, self-esteem and subjective well-being were measured. The results indicated that: 1) The meaning in life and subjective well-being of stroke survivors were significantly positive correlated;2) Mastery and self-esteem played partial mediating roles between existential vacuum and subjective well-being;Self-esteem played full a mediating role between suffer acceptance and subjective well-being;Mastery played a full mediating role between life control and subjective well-being;Mastery played a partial mediating role between death acceptance and subjective well-being;Self-esteem also played a partial mediating role between mastery and subjective well-being.

A Study of Estimating the Safe Storage Life, Self-accelerating Decomposition Temperature and Critical Temperature of Thermal Explosion of Double-base Propellant Using Isothermal and Non-isothermal Decomposition Behaviours

A method of estimating the safe storage life （τ）, self-accelerating decomposition temperature （TsADT） and critical temperature of thermal explosion （Tb） of double-base propellant using isothermal and non-isothermal decomposition behaviours is presented. For double-base propellant composed of 56±1wt% of nitrocellulose （NC）, 27±0.5wt% of nitroglycerine （NG）, 8.15±0.15wt% of dinitrotoluene （DNT）, 2.5±0.1wt% of methyl centralite, 5.0±0.15wt% of catalyst and 1.0±0.1wt% of other, the values of r of 49.4 years at 40℃, of TSAOT of 151.35℃ and of Tb of 163.01℃ were obtained.

Bullying among people with visual impairment: Prevalence, associated factors and relationship to self-efficacy and life satisfaction

AIM To examine associated factors of bullying and to determine associations between bullying and psychosocial outcomes among individuals with visual impairments(Ⅵ). METHODS We conducted an age-stratified cross-sectional survey of adults with Ⅵ who were recruited from the Norwegian Association of the Blind and Partially Sighted. Data were collected through structural telephone interviews in the period between February and May, 2017. Linear regression models were used to examine factors related to bullying and associations of bullying with self-efficacy and life satisfaction.RESULTS A total of 736 individuals were interviewed. The lifetime and 6-mo prevalence of bullying was 41.7% and8.2%, respectively. The majority of bullied participants reported Ⅵ-specific bullying(65.1%). Victimization of bullying was associated with young age, early onsetage of Ⅵ, and having other impairments. Participants who reported bullying had lower levels of self-efficacy[Adjusted relative risk(ARR): 0.40, 95% confidence interval(CI): 0.19-0.85] and life satisfaction(ARR: 0.68,95%CI: 0.51-0.91).CONCLUSION Bullying is highly prevalent among individuals withⅥ. Our findings suggest that interventions to reduce bullying may be beneficial for improving the well-being and life quality of people with Ⅵ.

The Effect of Anemia on Quality of Life and Self-Care Agency in Turkey Hemodialysis Patients

Objective: Anemia is an important complication which affects quality of life and self-care agency in hemodialysis patients. The aim of this study was to determine the effects of anemia on quality of life and self-care agency in adult patients who receive chronic hemodialysis treatment. Methods: In this cross-sectional study, the Quality of Life Scale, the Self Care Agency Scale, and a data form were administered to 136 hemodialysis patients who were receiving treatment three hospital-based dialysis units in Istanbul. Results: The health perception of cases whose hemoglobin level was 12 mg/dl and above was significantly better than those whose hemoglobin level was lower than 12 mg/dl. Hemoglobin levels were significantly and positively correlated to physical role function, general health, and health from the previous year (p < 0.05). As the hemoglobin levels of the cases increased, quality of life pertaining to the mentioned domains increased. Conclusion: It was concluded that the quality of life in chronic dialysis patients was affected by anemia.

Health Literacy, Self-Care Behavior and Quality of Life in Acute Coronary Syndrome Patients: An Integrative Review

Purpose: The review aimed to find the best evidence on the relationship between health literacy, self-care behavior and perceived quality of life (QoL) among patients with acute coronary syndrome (ACS). Methods: Searching engines included Cumulative Index to Nursing Allied Health Literature (CINAHL), Pro Quest, MEDLINE, Google Scholar, SAGE Journals, Wiley on Line Library, and Science Direct electronic databases from 2010 to 2018. Fifteen research articles assessed the main variables and their associations with demographic and clinical variables. Results: Different methodologies and samples were analyzed: analytic descriptive, systematic review, a randomized control trial, retrospective cohort, a prospective Cohort, cross-sectional, and correlational designs. The fifteen studies showed that the patients with ACS have inadequate health literacy. Patients’ ability to understand basic and complex information or to accurately assess health risks was impaired and may hinder patients’ engagement in self-care. Low HL in patients having ACS is consistently associated with poor QoL. Physical domain of QoL remained the significant outcome of both self-care behavior and health literacy after adjusting for demographics and clinical variables in patients with ACS. Conclusion: The literature pointed to the importance of considering health literacy and self-care behaviors as predictors of quality of life among patients with ACS. However, there has been no previous evidence on the best process of the association between these three variables.

The Effectiveness of Life Skills Training on Enhancing the Self-Esteem of Hearing Impaired Students in Inclusive Schools

This research investigates the effectiveness of life skills training on enhancing the self-esteem of 8-16 years-old students with hearing impairment in inclusive schools. The sample was included of 54 students with hearing impairment from inclusive school whom their age and IQ were matched. They were randomly divided into an experimental and a control group (27 students in each group). The participants were assessed by Coopersmith Self-esteem Inventory (58-items version). The gathered data were analysed using the t-test method through the SPSS package. The results showed that training life skills to students with hearing impairment promote their self-esteem. In other words, life skills training is effective for enhancing the self-esteem of hearing impaired students in inclusive schools.

An Examination of the Validity of the Differentiation-of-Self Hypothesis and Its Mechanism Related to Negative Life Event Aversion among Japanese University Students

This study examined the validity of the differentiation-of-self hypothesis for Japanese university students, and its mechanism in relation to negative life event aversion. Although the differentiation-of-self hypothesis is accepted as one of the basic hypotheses in the clinical field of family therapy in Japan, empirical studies on the subject are scarce. Further, there are few studies, internationally, on its mechanism. A questionnaire survey was conducted with university students (n = 250) to measure their differentiation of self, maladaptive states, and negative life event aversion. Compared to the better-differentiated group, the less-differentiated group had higher scores both for maladaptive states—somatic symptoms (t(223) = -2.70, p = 0.008), social dysfunction (t(211.00) = -3.30, p = 0.001), and severe depression (t(208.78) = -4.08, p < 0.001)—and negative life event aversion—interpersonal domain (t(223) = -3.96, p < 0.001) and achievement domain (t(223) = -3.83, p < 0.001). The results supported the validity of the differentiation-of-self hypothesis for Japanese university students, and that cognitive tendencies toward negative life events may be part of the mechanism for less-differentiated individuals’ subsequent vulnerability. This suggests the effectiveness of cognitive interventions.

创造力与大学生生命意义感:积极情绪和创造性自我效能感的作用

为考察创造力与大学生生命意义感之间的关系,以及积极情绪和创造性自我效能感在其中的作用,本研究采用Runco创新观念行为量表、积极情绪量表、创造性自我效能感问卷和生命意义问卷对665名大学生进行了测查。结果显示:(1)创造力、积极情绪、创造性自我效能感和生命意义感之间存在两两正相关关系;(2)积极情绪在创造力与生命意义感之间起部分中介作用;(3)创造性自我效能感调节了创造力影响生命意义感的直接路径,随着创造性自我效能感的提升,创造力对生命意义感的预测作用减弱。本研究在理论上揭示了创造力对生命意义感的作用及其机制,对大学生生命意义教育具有一定实践参考价值。

心理弹性在老年慢性疼痛患者疼痛管理自我效能与生活质量间的中介效应

目的 探讨心理弹性在老年慢性疼痛患者疼痛管理自我效能与生活质量间的中介效应。方法 2021年1月至12月采用方便抽样法选取在南京大学医学院附属鼓楼医院就诊的老年慢性疼痛患者96例为研究对象,应用心理弹性量表、疼痛管理自我效能量表及老年生活质量评定表对入组患者进行调查,采用Bootstrap法行中介效果验证。结果 老年慢性疼痛患者心理弹性与疼痛自我管理效能及生活质量呈正相关(r=0.456、0.478,P<0.05)。心理弹性在老年慢性疼痛患者疼痛自我管理效能及生活质量间存在部分中介效应,占总效应52.1%。结论 老年慢性疼痛患者心理弹性及疼痛自我管理水平处于中等偏低,生活质量还有待提高。心理弹性水平可影响老年慢性疼痛患者疼痛管理自我效能及生活质量,建议医院、社区及家庭可给予患者鼓励及支持,以增强患者心理弹性,提高患者疼痛管理自我效能,提高患者生活质量。

Symptoms, Illness Perceptions, Self-Efficacy and Health-Related Quality of Life Following Colorectal Cancer Treatment

Introduction: Lower health-related quality of life (HRQoL) is associated with fatigue, poor mental and poor gastrointestinal health during the first three months after colorectal cancer (CRC) treatment. Research indicates that maintaining usual activities has a positive impact on HRQoL after treatment for CRC. Illness perceptions have been associated with HRQoL in other cancer diseases, and self-efficacy has been associated with HRQoL in gastrointestinal cancer survivors. Our knowledge about illness perceptions and self-efficacy in relation to maintaining everyday activities and HRQoL following CRC treatment is incomplete. Aim: To explore associations between HRQoL, fatigue, mental health, gastrointestinal health, illness perceptions and self-efficacy in relation to maintaining everyday activities, three months after surgical CRC treatment. A further aim was to test the Maintain Function Scale in a CRC population. Method: The study was cross-sectional. Forty-six persons participated. Data were collected using questionnaires. Descriptive and analytical statistics were used. Results: Persons who were more fatigued, depressed, worried, and had more diarrhea were more likely to report lower HRQoL. Increased fatigue and diarrhea were associated with decreased HRQoL. Concerning illness perceptions, persons who reported negative emotions and negative consequences of CRC were more likely to report lower HRQoL. Persons scoring higher on self-efficacy were more likely to report higher HRQoL. Increased self-efficacy was associated with increased HRQoL. The Maintain Function Scale was suitable for assessing self-efficacy in relation to maintaining everyday activities. Conclusions: Nursing support to improve self-efficacy and illness perceptions and to minimize symptoms during recovery should have a favorable impact on HRQoL.

基于概率稀疏自注意力的航空发动机剩余寿命预测

航空发动机剩余寿命预测对其健康管理具有重要意义,针对长序列、多维度的航空发动机监测参数,提出一种基于概率稀疏自注意力(ProbSparse Self-Attention)的Transformer模型以实现航空发动机剩余寿命的准确预测。用ProbSparse Self-Attention取代原始Transformer中的常规自注意力机制,使得模型更关注时间序列中重要的时间节点,大幅缩减时间维度,减小了时间和空间复杂度;通过注意力层整合后的信息,进一步通过前馈神经网络层和卷积层,提取传感器的空间特征,编码层之间通过扩张因果卷积相连接,扩大了感受野,提高了模型对长序列信息的捕获能力。在新公开的N-CMAPSS数据集上验证算法,实验结果表明,相比于实验中的对比模型,所提模型的RMSE和Score值均有提升,推理速度也优于其他模型。

基于微信平台的闭环健康教育模式在门诊慢性前列腺炎患者中的应用

目的:探讨基于微信平台的闭环健康教育模式在门诊慢性前列腺炎患者中的应用效果。方法:选取2020年6月1日~2022年6月1日在门诊收治的96例慢性前列腺炎患者为研究对象,按照随机数字表法分为干预组和对照组各48例,对照组实施常规护理模式,干预组在对照组基础上实施基于微信平台的闭环健康教育模式;比较两组护理前后临床症状改善情况[采用前列腺炎症状指数(NIH-CPSI)]、疾病认知度、负性情绪[采用焦虑自评量表(SAS)和抑郁自评量表(SDS)]、自我效能和勃起障碍[采用一般自我效能感量表(GSES)和国际勃起功能问卷表-5(IIEF-5)]、生活质量[采用生活质量综合评定问卷(QOL)]、护理满意度。结果:护理后,两组GSES、IIEF-5、QOL评分均高于护理前(P<0.05),且干预组高于对照组(P<0.01);护理后,两组NIH-CPSI、SAS、SDS评分低于护理前(P<0.05),且干预组低于对照组(P<0.01);干预组护理满意度高于对照组(P<0.05)。结论:基于微信平台的闭环健康教育护理模式可以改善慢性前列腺炎患者的临床症状,减轻患者负性情绪和勃起障碍,从而提升患者自我效能和生活质量。

基于互动模式的社区自我管理活动对老年糖尿病患者生存质量干预效果分析

目的分析基于互动模式的社区自我管理活动对老年糖尿病患者生存质量的干预效果及影响因素,为提高患者生存质量提供依据。方法2016—2020年杭州市依托医联体建设及家庭医生签约服务资源,组建干预团队,以患者小组为单位开展系列自我管理活动干预。通过问卷调查方式收集基本信息、疾病状况、生存质量及自我管理行为情况。采用SPSS 19.0软件进行Friedman检验、Spearman相关检验及多重线性回归模型分析。结果共707例老年2型糖尿病患者纳入研究。干预前、干预4个月及干预10个月健康调查简表(SF-36)及2型糖尿病自我管理行为量表(2-DSCS)各维度得分差异具有统计学意义(χ^(2)>21.737,P<0.001)。干预4、10个月较干预前2-DSCS总分变化值与SF-36的各维度变化值均显著相关(r>0.125,P<0.01)。多重线性回归分析结果显示,生理健康(PCS)的影响因素有基线PCS得分、2-DSCS总分差值、伴2种及以上并发症,心理健康(MCS)的影响因素有基线MCS得分、2-DSCS总分变化值、伴有并发症及支付医疗费用比较困难(∣t∣>2.019,P<0.05)。结论基于互动模式的社区自我管理活动可有效改善患者管理行为,提升生存质量,且合并并发症、医疗费用支付能力对生存质量改善存在一定影响。

运动自我效能感在糖尿病患者血糖管理积极度与生活质量中的中介效应

目的探讨运动自我效能感在糖尿病患者血糖管理积极度与生活质量中的中介作用。方法选取2020年10月-2022年7月收治于我院的273例糖尿病患者,采用一般资料调查表、积极度量表(PAM)、运动自我效能感量表(ESES)及糖尿病特异性生活质量量表(DSQL)进行问卷调查。结果糖尿病患者PAM总分为(61.61±18.77)分,总体处于第3水平;ESES总分为(6.40±1.96)分,处于中上水平;DSQL总分为(78.45±19.45)分,处于中等水平。Pearson相关分析显示:糖尿病患者血糖管理积极度、运动自我效能感与生活质量两两呈正相关(P<0.01)。中介分析结果显示:运动自我效能感在血糖管理积极度与生活质量间存在部分中介效应,效应量为29.8%。结论糖尿病患者运动自我效能感、血糖管理积极度和生活质量总体处于中等水平,仍需改善,血糖管理积极度可通过运动自我效能感的中介作用对患者生活质量产生影响,提示临床医务人员可通过改善患者血糖管理积极度,从而达到提高患者生活质量的目的。

“互联网+中医护理服务”对低视力病人生活质量的影响

目的:探讨“互联网+中医护理服务”对低视力病人生活质量的影响。方法:选取2020年9月—2022年9月中国中医科学院眼科医院内障眼病科收治的100例低视力病人作为研究对象,采用随机数字表法将病人分为试验组及对照组,每组50例。对照组采用常规中医护理,试验组在对照组基础上采用“互联网+中医护理服务”。比较两组病人干预前及干预3个月后焦虑、生活质量、自理能力。结果:试验组病人干预3个月后生活质量评分为(58.90±6.35)分,高于干预前[(34.98±5.13)分]及同期对照组[(37.98±6.24)分];自理能力评分为(71.66±4.62)分,高于干预前[(53.46±5.27)分]及同期对照组[(61.50±4.77)分];焦虑评分为(46.94±6.99)分,低于干预前[(55.12±8.85)分]及同期对照组[(52.62±7.35)分],差异均有统计学意义(P<0.05)。结论:采用“互联网+中医护理服务”能有效改善低视力病人生活质量、自理能力及焦虑状态。

旅游能带给人们生命意义感吗?——旅游情境下的生命意义感生成机制研究

生命意义感是人类活动的关键引擎,有意义的生活是幸福的最深层次含义。文章以人们踏上旅途寻求生活的意义这一现实现象为切入点,将积极心理学中的生命意义感范畴引入旅游研究视野,以相关网络游记与社区问答文本为材料,运用扎根理论进行编码分析,最终提炼出“旅游世界中的顿悟时刻”这一核心范畴,对旅游者获取生命意义感的具体过程与一般路径作出理论解释。研究发现:1)旅游者以具身实践的方式主动地构建生命意义,具身实践是旅游者生命意义感的来源;2)旅游者由审美体验中的自我超越激发生命活力,自发地觉察生命意义;3)旅游者通过自我反思这一内省过程形成对世界与真实自我的深刻理解,不断地追寻生命意义;4)旅游者通过自我认同的强化实现自我价值的确认,进而真正地肯定生命价值;5)回归日常生活世界时,人们通过回忆与回味重新赋予旅游体验以新的意义,个体生命状态的转变是旅游积极人生意义的一种体现。文章创新地构建出旅游世界中的生命意义感生成模型,对人们在旅游世界中获取生命意义感的顿悟时刻进行了深入解读,丰富了旅游体验的研究内容,深化了现有研究对旅游积极效应的认识,为深入理解旅游的意义提供了新思考。

跨国社会空间中“对话的自我”—基于一个旅德温州女性的生命叙事

论文基于一个旅居德国27年的温州女性毓芬的生命叙事,采用“对话的自我”的理论框架,探讨了毓芬在德国期间,伴随着中国在国际舞台的崛起、家乡温州的发展与变化,使得她不断重新审视自己在“去”、“留”以及“回还是不回”的每个关键阶段中的自我认同及其(再)建构策略。在叙述中,“自我”在一系列的“对话”过程中被(再)建构,其中包括:东道国—来源国(经济、制度、文化等)的对话、“现在的我”和“过去的我”的对话、个体认同和集体认同之间的对话。由此,毓芬从“时髦的出国爱国青年”变成“连接中断生平、弥补地位落差的异乡奋斗人”,再成为“宣扬中华‘孝’文化、纠结‘回还是不回’的矛盾人”。“对话”是一个不断协商的过程,体现了个体的主体性和能动性,而跨国社会空间中“对话的自我”也具有了空间性、时间性和社会性。

子宫内膜异位症患者的中医慢病护理门诊管理

目的评价中医慢病护理门诊对子宫内膜异位症患者的管理效果。方法采用历史对照法,将2020年1-12月行腹腔镜手术的子宫内膜异位症门诊就诊的痛经患者88例作为对照组,按常规行术后门诊复诊及随访;2021年1-12月行腹腔镜手术的门诊就诊的88例痛经患者为观察组,在对照组基础上实施子宫内膜异位症中医慢病护理;干预3个月。干预后3、6、12个月评估干预效果。结果两组各85例患者完成研究及随访。两组痛经评分、自我管理能力评分及生存质量评分比较,组间效应、时间效应及交互效应差异有统计学意义(均P<0.05)。结论对子宫内膜异位症患者实施中医慢病护理门诊管理,可更有效地改善痛经症状,提高疾病自我管理能力和生存质量。