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Correlation of personality with individual reproductive success in shrub-nesting birds depends on their life history style
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作者 Jianchuan Li Wen Zhang +5 位作者 Ningning Sun Yujie Wang Lifang Gao Ran Feng Liqing Fan Bo Du 《Avian Research》 SCIE CSCD 2024年第1期42-49,共8页
Two questions in the research of animal personality—whether there is a correlation between a personality trait and individual reproductive success,and what is the genetic basis underlying a personality trait—remain ... Two questions in the research of animal personality—whether there is a correlation between a personality trait and individual reproductive success,and what is the genetic basis underlying a personality trait—remain unresolved.We addressed these two questions in three shrub-nesting birds,the Azure-winged Magpie(Cyanopica cyanus,AM),White-collared Blackbird(Turdus albocinctus,WB),and Brown-cheeked Laughingthrush(Trochalopteron henrici,BL).The personality type of an individual was first identified according to its response to a territorial intruder.Then,we compared the fleeing distance,breeding parameters,and differential expressed genes(DEGs) in the brain transcriptome between bold and shy breeders.In the three species,bold breeders exhibited more aggressiveness towards an intruder of their territory than did shy breeders.The reproductive success of bold breeders was significantly higher than that of shy breeders in AM but not in WB and BL.The three species shared one DEG,crabp1,which was up-regulated in bold relative to in shy individuals.By regulating the expression of corticotropin-releasing hormone,higher crabp1 gene expression can decrease cellular response to retinoic acid.Therefore,bold individuals are insensitive to external stresses and able to exhibit more aggressiveness to intruders than their shier counterparts.Aggressiveness is beneficial to bold individuals in AM but not in WB and BL because the former could evoke neighbors to make the same response of defending against intruders but the latter could not.Although a personality trait may have the same genetic basis across species,its correlation with reproductive success depends largely on the life history style of a species. 展开更多
关键词 BOLDNESS life history style PERSONALITY Reproductive success Transcriptome analysis
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Impact of lifestyle interventions on pathogenesis of nonalcoholic fatty liver disease
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作者 Wafaa Mohamed Ezzat 《World Journal of Gastroenterology》 SCIE CAS 2024年第20期2633-2637,共5页
This editorial builds on the article titled“Establishment and validation of an adherence prediction system for lifestyle interventions in non-alcoholic fatty liver disease”by Zeng et al.We carried out a critical exa... This editorial builds on the article titled“Establishment and validation of an adherence prediction system for lifestyle interventions in non-alcoholic fatty liver disease”by Zeng et al.We carried out a critical examination of nonalcoholic fatty liver disease(NAFLD)pathogenesis and how lifestyle interventions could facilitate disease resolution,particularly highlighting that non-alcoholic steatohepatitis(NASH)is a severe form of NAFLD.Our discussion details that weight loss is a pivotal factor in disease outcomes:A 3%-5%reduction is enough for resolution in 50%of non-obese individuals,while a 7%-10%reduction achieves similar benefits in obese individuals,as demonstrated by magnetic resonance spectroscopy.Additionally,the editorial underscores that such lifestyle changes are instrumental not only in resolving NAFLD but also in reversing hepatic steatosis and inflammation.These insights,derived from the research,emphasize the critical role of personalized lifestyle modifications in halting the progression of NAFLD to NASH and even reversing fibrosis,thus offering a template for effective patient management. 展开更多
关键词 Nonalcoholic fatty liver disease Non-alcoholic steatohepatitis DIET Physical activity life style
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Traditional Architectural Construction Style in the Contemporary Application and Transformation——A Case Study in the Eastern Area of Zhejiang Province 被引量:2
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作者 张友军 刘岚 《Journal of Landscape Research》 2010年第9期12-16,共5页
Traditional architectural construction style had rich connotation for application and transformation in contemporary architectural space design.With buildings in the eastern areas of Zhejiang Province as the research ... Traditional architectural construction style had rich connotation for application and transformation in contemporary architectural space design.With buildings in the eastern areas of Zhejiang Province as the research subjects,the paper explored forms of application and transformation and specific design techniques from microcosmic point. 展开更多
关键词 TRADITIONAL architecture Construction style APPLICATION and transformation
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Study on Preservative Formula and Shelf Life of Cantonese Style Moon Cakes 被引量:3
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作者 林真 张温玲 陈健 《Agricultural Science & Technology》 CAS 2017年第11期2171-2174,共4页
To ensure the safety of consumers, prolong the shelf life of moon cake and reduce the cost of manufacturing and marketing enterprises, the optimization of preservative formula and the shelf life of cantonese style moo... To ensure the safety of consumers, prolong the shelf life of moon cake and reduce the cost of manufacturing and marketing enterprises, the optimization of preservative formula and the shelf life of cantonese style moon cake were studied. Through single and compound formula preservative test, the results showed that potassium sorbate and sodium dehydroacetate could inhibit the microorganisms in the moon cake, but the inhibitory effect of sodium dehydroacetate was stronger than that of potassium sorbate; and the combination of potassium sorbate and sodium dehydroacetate had a synergistic effect, and the best formula is 'potassium sorbate 0.44 g/kg mixed with sodium dehydroacetate 0.38 g/kg. A batch of moon cake was prepared with the best preservative formula, then the total number of colonies, molds and coliform group in the samples were detected by random sampling at irregular intervals. The total number of molds exceeded the limit on the 187^th d, and it indicated that the shelf life of the product was 187 d. Compared with the conventional 15-day shelf life, this research greatly prolongs the sheff life of cantonese style moon cake, and cut down the cost of moon cake enterprises. It is worthy of popularization and application. 展开更多
关键词 Cantonese style moon cakes Potassium sorbate Sodium dehydroacetate Formula optimization Shelf life
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Lifestyle and dietary factors in the prevention of letha prostate cancer 被引量:3
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作者 Kathryn M Wilson Edward L Giovannucci Lorelei A Mucci 《Asian Journal of Andrology》 SCIE CAS CSCD 2012年第3期365-374,I0004,I0005,共12页
The prevention of lethal prostate cancer is a critical public health challenge that would improve health and reduce suffering from this disease. In this review, we discuss the evidence surrounding specific lifestyle a... The prevention of lethal prostate cancer is a critical public health challenge that would improve health and reduce suffering from this disease. In this review, we discuss the evidence surrounding specific lifestyle and dietary factors in the prevention of lethal prostate cancer. We present a summary of evidence for the following selected behavioral risk factors: obesity and weight change, physical activity, smoking, antioxidant intake, vitamin D and calcium, and coffee intake. 展开更多
关键词 EPIDEMIOLOGY DIET life style OBESITY physical activity PREVENTION prostate cancer
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Seroprevalence of Helicobacter pylori in dyspeptic patients and its relationship with HIV infection,ABO blood groups and life style in a university hospital,Northwest Ethiopia 被引量:2
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作者 Feleke Moges Afework Kassu +4 位作者 Getahun Mengistu Solomon Adugna Berhanu Andualem Takeshi Nishikawa Fusao Ota 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第12期1957-1961,共5页
AIM: To determine the prevalence of Helicobacter pylori (H pylori) among dyspeptic patients and to assess the relationship between Hpylori infection, blood group, HIV infection and life style of the patients. METH... AIM: To determine the prevalence of Helicobacter pylori (H pylori) among dyspeptic patients and to assess the relationship between Hpylori infection, blood group, HIV infection and life style of the patients. METHODS: In a hospital-based cross-sectional study, patients attending Outpatient Department of University of Gondar Hospital were enrolled. Socio-demographic information was collected using questionnaires. Serum was analyzed for anti-H pylori IgG antibodies using a commercial kit. HIV serostatus was determined by enzyme-linked immunosorbent assay (ELISA). Blood grouping was performed by slide agglutination tests. RESULTS: A total of 215 dyspeptic patients were included in the study. One hundred and sixteen patients (54%) were females and 99 (46%) were males. Anti-H pylori IgG antibodies were detected in sera of 184 (85.6%) patients. The prevalence was significantly higher in patients aged 50 years and above. Twenty point five percent of the patients were found to be seropositive for HIV. No significant association was found between sex, ABO blood groups, consumption of spicy diets, socioeconomic status and seropositivity for Hpylori. However,alcohol consumption was significantly associated with H pylori serology. CONCLUSION: The prevalence of H pylori infection is associated with a history of alcohol intake and older age. The effect of different diet, alcohol and socioeconomic status as risk factors for H pylori infection needs further study. 展开更多
关键词 HPYLORI Blood group HIV life style
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Remaining Useful Life Prediction of Rail Based on Improved Pulse Separable Convolution Enhanced Transformer Encoder
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作者 Zhongmei Wang Min Li +2 位作者 Jing He Jianhua Liu Lin Jia 《Journal of Transportation Technologies》 2024年第2期137-160,共24页
In order to prevent possible casualties and economic loss, it is critical to accurate prediction of the Remaining Useful Life (RUL) in rail prognostics health management. However, the traditional neural networks is di... In order to prevent possible casualties and economic loss, it is critical to accurate prediction of the Remaining Useful Life (RUL) in rail prognostics health management. However, the traditional neural networks is difficult to capture the long-term dependency relationship of the time series in the modeling of the long time series of rail damage, due to the coupling relationship of multi-channel data from multiple sensors. Here, in this paper, a novel RUL prediction model with an enhanced pulse separable convolution is used to solve this issue. Firstly, a coding module based on the improved pulse separable convolutional network is established to effectively model the relationship between the data. To enhance the network, an alternate gradient back propagation method is implemented. And an efficient channel attention (ECA) mechanism is developed for better emphasizing the useful pulse characteristics. Secondly, an optimized Transformer encoder was designed to serve as the backbone of the model. It has the ability to efficiently understand relationship between the data itself and each other at each time step of long time series with a full life cycle. More importantly, the Transformer encoder is improved by integrating pulse maximum pooling to retain more pulse timing characteristics. Finally, based on the characteristics of the front layer, the final predicted RUL value was provided and served as the end-to-end solution. The empirical findings validate the efficacy of the suggested approach in forecasting the rail RUL, surpassing various existing data-driven prognostication techniques. Meanwhile, the proposed method also shows good generalization performance on PHM2012 bearing data set. 展开更多
关键词 Equipment Health Prognostics Remaining Useful life Prediction Pulse Separable Convolution Attention Mechanism Transformer Encoder
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Life Style and Risk Behavior of Street Children in Bangladesh: A Health Perspective
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作者 Sajeda Chowdhury Abu Sayeed Chowdhury +4 位作者 KATM Ehsanul Huq Yasmin Jahan Rubana Chowdhury Toufiq Ahmed Md Moshiur Rahman 《Health》 2017年第4期577-591,共15页
Background: Street children concern to millions of deprived boys and girls who have adopted the street as their residence. They grow up where tranquility and physical and emotional stability are frequently threatened.... Background: Street children concern to millions of deprived boys and girls who have adopted the street as their residence. They grow up where tranquility and physical and emotional stability are frequently threatened. The purpose is to have an empathetic look into the lives of street children for identifying their health-related needs. Method: A cross sectional descriptive type of study was conducted among 125 street children between the ages 8 to 14 years who were available at different intercept points of Dhaka city, Bangladesh. The information was collected through face-to-face interview using a structured questionnaire. An attempt was made to relate their lifestyle, risk behavior and health impact upon the socio demographic characteristics. Result: According to the statement of street children, poverty (41%) is the main reason behind enforcing the children to stay and work on the street. They pass their leisure by playing games, roaming around by watching video/cinema but on the other side of the coin, they are frequently abused (80.8%) either physically or sexually. Regarding health, about 87.2% of street children were suffering from different type of diseases as accidental injury, skin infection, hepatitis, sexually transmitted diseases and warm infestation. Conclusion: A careful examination of the lives of these children will provide a clearer understanding of their disadvantageous life. A better diagnosis of the contributing factors will help to minimize the extent of the problems and also to develop innovative approaches and ensure a healthy lifestyle, protection and rehabilitation for those children. 展开更多
关键词 STREET CHILDREN life style Risk Behavior BANGLADESH
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Key Elements of “Family” Life Style of Old-age Residential Facilities
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作者 LIU Linggui LIANG Ying ZHOU Dian 《Journal of Landscape Research》 2019年第6期33-36,共4页
The problem of old-age care in China is more and more serious. Under the background of continuous promotion of community old-age, the importance of research on the"family" life style of oldage residential fa... The problem of old-age care in China is more and more serious. Under the background of continuous promotion of community old-age, the importance of research on the"family" life style of oldage residential facilities has become increasingly prominent. Through field survey of different types of oldage residential facilities and questionnaire interviews, the shortcomings of the old-age residential facilities in Xi’an were compared and summarized, and the key elements of "family" life style of the old-age residential facilities were concluded, which mainly include urban community embeddedness, family structure elements, indoor furnishings and accompanying care system. The "family" life style of the old-age residential facilities can not only maintain the "kinship" living needs, but also conform to the new direction of promoting the "community" of the old-age residential facilities in China. 展开更多
关键词 OLD-AGE facilities “Family” life style BUILDINGS for the aged
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Efficacy and educational role of a daily employment of the accelerometer to improve the life style in overweight-hypertensive population
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作者 Laura Stefani Antonio Maone +5 位作者 Gabriele Mascherini Irene Scacciati Ilaria Corsani Alessandro Gilardetti Giulio Ciullini Giorgio Galanti 《Health》 2011年第3期141-145,共5页
The daily evaluation of the life style is funda- mental for the “exercise as prescription” to re- duce the cardiovascular risks factors. The reg- istration by an accelerometer can identify active from inactive subje... The daily evaluation of the life style is funda- mental for the “exercise as prescription” to re- duce the cardiovascular risks factors. The reg- istration by an accelerometer can identify active from inactive subjects. The aim of the present study is to verify, in a small cohort of subjects at high risk level (obese–hypertensive), the health outcomes. A group of 22 subjects were evalu- ated by the questionnaire and also by an accel- erometer positioned on belt for 5 days to estab- lish the daily Physical Activity Level (PAL).The anthropometrics parameters, Body Mass Index (BMI), Waist Circumference, Hip Circumference, Fat Mass, Free Fat Mass, Total Body–Intracellular and Extracellular Water and Phase Angle (PA) were measured at the beginning and after 3 months of regular exercise. The amount of the exercise prescribed for three months and at least 3 times in a weak, was determined by the Cardiopulmonary test at the 60% of the VO2. Sta-tistical analysis included T-Student test for paired data with a significance at P < 0.05value. Respect of the questionnaire the accelerometer report showed a predominantly inactive life style (PAL = 1.49 ± 0.13). After three months the BMI was significantly reduced in all (p < 0.05) and in addi-tion a trend toward a reduction was also observed for Fatty Mass and for the body composition parameters. The employment of the accelerometer is therefore associated to an improvement of the parameters strongly related with the cardiovascular risk. The results obtained are suggestive for an educational role of this tool in subjects at high risk level. 展开更多
关键词 ACCELEROMETER life style Spontaneous Physical ACTIVITY Body Composition And Phisycal ACTIVITY Exercise As PRESCRIPTION
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Use of mobile-stroke risk scale and lifestyle guidance promote healthy lifestyles and decrease stroke risk factors
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作者 Kelana Kusuma Dharma Parellangi 《International Journal of Nursing Sciences》 CSCD 2020年第4期401-407,I0003,共8页
Objective:The purpose of this study was to determine the effectiveness of Mobile-Stroke Risk Scale and Life Style Guidance(M-SRSguide)in promoting a healthy lifestyle and reducing stroke risk factors in atrisk persons... Objective:The purpose of this study was to determine the effectiveness of Mobile-Stroke Risk Scale and Life Style Guidance(M-SRSguide)in promoting a healthy lifestyle and reducing stroke risk factors in atrisk persons.Methods:This research was an clinical trial with a pre-test and post-test control group design.The accessible population is persons at risk of stroke in the community(West and East Kalimantan Province,Indonesia).Thirty-two participants in the intervention group and 32 participants in the control group participated in this study.The sampling method was systematic random sampling.We allocate the sample into the intervention and control groups using a randomized block design.The intervention group used the M-SRSguide.The control group used manual book for a self-assessment of stroke risk.The measurement of a healthy lifestyle and the stroke risk factors was performed before and six months after the intervention.Results:There are no significant differences in healthy lifestyle and stroke risk factors between the two groups after the intervention(P>0.05).Analysis of healthy lifestyle behavior assessment items in the intervention group showed an increase in healthy diets,activity patterns,and stress control after the use of the M-SRSguide(P<0.01).Conclusion:The use of M-SRSguide is effective in promoting a healthy lifestyle. 展开更多
关键词 Health promotion life style Mobile applications Risk factors STROKE
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Study of the Effect of Food Habit, Lifestyle and Daily Trip on Physical and Mental Status of Subjects at Islamic University in Kushtia, Bangladesh
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作者 Shahedur Rahman Anowar Khasru Parvez +1 位作者 Abdus Sabur Shahjahan Ali 《Open Journal of Statistics》 2012年第2期219-223,共5页
This is a qualitative (study that used framework analysis) to examine by interviews among University personnel who live inside and outside the Islamic University campus in Kushtia, Bangladesh. In the present study, we... This is a qualitative (study that used framework analysis) to examine by interviews among University personnel who live inside and outside the Islamic University campus in Kushtia, Bangladesh. In the present study, we found that subjects who live inside of the University feel better physically and mentally than the nonresident subjects. It was found that residents are more fit and feel better during and after class time. Resident subjects have less stress and maintain balanced diet for which they have good average BMI value than the nonresident subjects. In addition nonresident subjects have suffered diseases comparatively much more than resident subjects. 展开更多
关键词 Food HABIT life style DAILY TRIP PHYSICAL HEALTH Mental HEALTH HEALTH Risk
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Work Transformations and Their Consequences for the Personal Life of Workers
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作者 Renata Tomaszewska-Lipiec 《Chinese Business Review》 2016年第5期239-248,共10页
The civilisation transformations which occur in the sphere of human work, have a strong influence over their functioning both in the professional and extraprofessional spheres. Scientific analyses, as well as everyday... The civilisation transformations which occur in the sphere of human work, have a strong influence over their functioning both in the professional and extraprofessional spheres. Scientific analyses, as well as everyday observation, suggest that there are increases in the tension between work and personal life, which results in imbalance and perceiving both the spheres as mutually contradictory, as well as having adverse consequences for workers and their families, organisations, the society, and economics. As regards this occurrence, the aim of the article is to show selected civilizational trends which generate the issues with maintaining work--personal life balance of contemporary humans. The article is of theoretical character and is based on the method of critical literature analysis, as well as on the analysis of formal-legal documents, reports, and statistical sources. The theoretical-case analyses let one formulate a conclusion that the transformation one undergone in the sphere of professional work often bears adverse consequences for the sphere of workers' personal lives and this should be a significant scientific research field. 展开更多
关键词 civilisational transformation transformations of work WORK personal life BALANCE personal timemanagement
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Family Lifestyle and Housing Preferences during the Process of Globalization: The Case of Turkey
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作者 Betel Gurel Hulya Oztop 《Journalism and Mass Communication》 2014年第12期787-793,共7页
Although the fundamental physical role of housing is safety and sheltering for individuals, it is in fact the collection of places that hold the family together. Due to globalization and changes in the world, housing ... Although the fundamental physical role of housing is safety and sheltering for individuals, it is in fact the collection of places that hold the family together. Due to globalization and changes in the world, housing is no longer only a structure that provides sheltering but is also a factor that provides mutual interaction in formation of life style and quality. The elements such as the increase in the effect of consumption preferences and life style on selections, the changes in family structure, and urban structures also influence the residences used and housing preferences. The purpose of this study is to determine the general situation of housing preferences while taking into account the family life style in Turkey and at the same time to make an evaluation based on international publications. 展开更多
关键词 family life styles housing preference GLOBALIZATION
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Transformational Leadership: The Emerging Leadership Style of Successful Entrepreneurs
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作者 Nerisa N. Paladan 《Journal of Literature and Art Studies》 2015年第1期64-72,共9页
This research was conducted to identify the emerging leadership style being practiced by successful entrepreneurs and the leadership behavior they frequently applied. Since, leadership style and behavior has a huge in... This research was conducted to identify the emerging leadership style being practiced by successful entrepreneurs and the leadership behavior they frequently applied. Since, leadership style and behavior has a huge influence to the success of the entrepreneur's enterprise. One hundred and fifty (150) successful entrepreneurs was the respondent of this study and they were survey and interviewed about their actual leadership style and practices. The research design was qualitative-descriptive type of research with the use of the Multifactor Leadership Questionnaire 5X (MLQ 5X) as the survey instrument to collect data regarding leadership styles of successful entrepreneurs. An interview guide questions was likewise utilized for validating the result of the study. An in-depth semi-structured interview was also conducted to 30 entrepreneurs from the 150 respondents. Findings of the study revealed that a successful entrepreneur exhibits a noticeably higher inclination toward transformational leadership and they consistently rated themselves higher in inspirational motivation for their leadership behavior. Therefore, the emerging leadership style of successful entrepreneurs is the transformational leadership and the leadership behavior that they frequently use is the inspirational motivation. Furthermore, the aimed of this study is to explore practices of transformational leadership behavior of successful entrepreneurs from entrepreneur's perspective. 展开更多
关键词 transformational leadership emerging leadership style successful entrepreneurs
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A comparison of elderly (20~65 yrs) life style with body mass index (BMI)25
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作者 M.Saeed Heydarnejad Ali Hassanpour Dehkordi 《海南医学院学报》 CAS 2010年第3期311-314,共4页
Objective:compare the habits and features of obese (BMI>25) and normal (BMI<25) individuals and express a method to ameliorate the life styles using a cross-sectional experiment.Methods:A total of 220 randomly s... Objective:compare the habits and features of obese (BMI>25) and normal (BMI<25) individuals and express a method to ameliorate the life styles using a cross-sectional experiment.Methods:A total of 220 randomly selected cases were divided into case group (n=110) and control group (n=100) according to the calculated BMI level.Samples with BMI>25 kg/m2 were assigned to the case (obsess) group and those with BMI ranging from 20 to 25 were assigned to control (normal) group.The Miller-Smith life style questionnaires consisting 20 questions each with 5 different answers were given to both groups.Data of the questionnaires were collected and analyzed using t-test and Chi-square with SPSS.Results:No significant differences were found among the two groups in terms of the mean age,gender,level of education,marital status,insurance,breakfast,lunch or dinner,fried meat,legumes,caffeinated beverages,the length of sleep during 24 h,cigarette smoking and losing job or spouse.However,in regards to use of vegetables,sausage,fried potatoes,enriched breads,low fat milk,low salt,candies and chocolates significant relations were found (P<0.05).Conclusion:The present study suggests one way to control obesity and prevent diseases is to ameliorate the life styles.There is a relation between health and stress and irregularity of meals,such as breakfast skipping,is associated with overweight and obesity in adolescence. 展开更多
关键词 肥胖病 个人卫生 保健知识 治疗方法 预防措施
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Developing people's livelihood: construction of life style in visual threshold of Scientific Outlook on Development
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作者 左雪松 夏道玉 《沈阳工业大学学报(社会科学版)》 2011年第1期83-86,共4页
随着科学发展观的树立与落实,作为发展民生重要内容之一的生活方式建构已经成为科学发展观的重要课题突出地摆在世人面前。在马克思主义指导下,探讨科学发展观与生活方式建构的辩证关系,指出科学发展观为生活方式建构指明方向,生活... 随着科学发展观的树立与落实,作为发展民生重要内容之一的生活方式建构已经成为科学发展观的重要课题突出地摆在世人面前。在马克思主义指导下,探讨科学发展观与生活方式建构的辩证关系,指出科学发展观为生活方式建构指明方向,生活方式建构是科学发展观树立与落实的保证。在此基础上,挖掘生活方式建构的科学内涵,在科学发展观的视域中探寻生活方式建构的民生诉求。 展开更多
关键词 科学发展观 民生 生活方式 以人为本 全面协调 统筹兼顾 和谐社会
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On Hemingway's Iceberg Theory——From The Short Happy Life of Francis Macomber 被引量:1
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作者 杨清华 《海外英语》 2011年第11X期266-268,共3页
Ernest Hemingway's world-wide influence and distinctive writing style-the Iceberg Style-caused a stylistic revolution in the field of literature all over the world.Hemingway always tries his best to avoid depictin... Ernest Hemingway's world-wide influence and distinctive writing style-the Iceberg Style-caused a stylistic revolution in the field of literature all over the world.Hemingway always tries his best to avoid depicting things by piling gorgeously big words;on the contrary,he adopts direct description and short sentences which are precise,laconic,bright and vivid.For instance,the novel titled The Short and Happy Life of Francis Macomber is universally acknowledged as his masterpiece,in which "Iceberg Theory"is skillfully presented.With a full analysis of the story,the uniqueness of "Iceberg Theory"will be emphasized in this paper. 展开更多
关键词 ICEBERG Theory Telegraphic style The SHORT and HAPPY life of FRANCIS Macomber
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Deep Spatiotemporal Convolutional-Neural-Network-Based Remaining Useful Life Estimation of Bearings 被引量:7
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作者 Xu Wang Tianyang Wang +4 位作者 Anbo Ming Qinkai Han Fulei Chu Wei Zhang Aihua Li 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2021年第3期115-129,共15页
The remaining useful life(RUL)estimation of bearings is critical for ensuring the reliability of mechanical systems.Owing to the rapid development of deep learning methods,a multitude of data-driven RUL estimation app... The remaining useful life(RUL)estimation of bearings is critical for ensuring the reliability of mechanical systems.Owing to the rapid development of deep learning methods,a multitude of data-driven RUL estimation approaches have been proposed recently.However,the following problems remain in existing methods:1)Most network models use raw data or statistical features as input,which renders it difficult to extract complex fault-related information hidden in signals;2)for current observations,the dependence between current states is emphasized,but their complex dependence on previous states is often disregarded;3)the output of neural networks is directly used as the estimated RUL in most studies,resulting in extremely volatile prediction results that lack robustness.Hence,a novel prognostics approach is proposed based on a time-frequency representation(TFR)subsequence,three-dimensional convolutional neural network(3DCNN),and Gaussian process regression(GPR).The approach primarily comprises two aspects:construction of a health indicator(HI)using the TFR-subsequence-3DCNN model,and RUL estimation based on the GPR model.The raw signals of the bearings are converted into TFR-subsequences by continuous wavelet transform and a dislocated overlapping strategy.Subsequently,the 3DCNN is applied to extract the hidden spatiotemporal features from the TFR-subsequences and construct HIs.Finally,the RUL of the bearings is estimated using the GPR model,which can also define the probability distribution of the potential function and prediction confidence.Experiments on the PRONOSTIA platform demonstrate the superiority of the proposed TFR-subsequence-3DCNN-GPR approach.The use of degradation-related spatiotemporal features in signals is proposed herein to achieve a highly accurate bearing RUL prediction with uncertainty quantification. 展开更多
关键词 BEARING Remaining useful life Continuous wavelet transform Convolution neural network Gaussian process regression
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Preservation Property of NBUCA Life Distributions 被引量:3
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作者 WANG Feng-xiao 《Chinese Quarterly Journal of Mathematics》 2015年第2期206-210,共5页
In this paper, some results of the NBUCA class of life distribution are obtained.The preservation properties of NBUCA aging properties under anti-star-shaped transformation are investigated. The preservation of NBUCA ... In this paper, some results of the NBUCA class of life distribution are obtained.The preservation properties of NBUCA aging properties under anti-star-shaped transformation are investigated. The preservation of NBUCA aging properties under general accelerated life model are studied as well. 展开更多
关键词 preservation property anti-star-shaped transformation accelerated life model NBUCA
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