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The Impact of Big Five Personality Traits on Older Europeans’ Physical Health
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作者 Eleni Serafetinidou Christina Parpoula 《Journal of Biomedical Science and Engineering》 2024年第2期41-56,共16页
Investigating the role of Big Five personality traits in relation to various health outcomes has been extensively studied. The impact of “Big Five” on physical health is here explored for older Europeans with a focu... Investigating the role of Big Five personality traits in relation to various health outcomes has been extensively studied. The impact of “Big Five” on physical health is here explored for older Europeans with a focus on examining age groups differences. The study sample included 378,500 respondents derived from the seventh data wave of Survey of Health, Aging and Retirement in Europe (SHARE). The physical health status of older Europeans was estimated by constructing an index considering the combined effect of well-established health indicators such as the number of chronic diseases, mobility limitations, limitations with basic and instrumental activities of daily living, and self-perceived health. This index was used for an overall physical health assessment, for which the higher the score for an individual, the worst health level. Then, through a dichotomization process applied to the retrieved Principal Component Analysis scores, a two-group discrimination (good or bad health status) of SHARE participants was obtained as regards their physical health condition, allowing for further con-structing logistic regression models to assess the predictive significance of “Big Five” and their protective role for physical health. Results showed that neuroti-cism was the most significant predictor of physical health for all age groups un-der consideration, while extraversion, agreeableness and openness were not found to significantly affect the self-reported physical health levels of midlife adults aged 50 up to 64. Older adults aged 65 up to 79 were more prone to open-ness, whereas the oldest old individuals aged 80 up to 105 were mainly affected by openness and conscientiousness. . 展开更多
关键词 Big five Personality Traits Physical Health Older Europeans SHARE Principal Component Analysis
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The Prevalence and Risk Factors Associated with Otitis Media in Children under Five Years of Age in Mogadishu, Somalia: A Hospital-Based Cross-Sectional Study
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作者 Ismail Ali Mohamed Zakaria Ahmed Mohamed +1 位作者 Fang Ning Wang Xin 《International Journal of Otolaryngology and Head & Neck Surgery》 2023年第6期426-443,共18页
Background: Otitis media (OM) is highly prevalent and is one of the most important causes of preventable hearing loss in developing countries and it may have long-term impacts on the children. Several hospital-based c... Background: Otitis media (OM) is highly prevalent and is one of the most important causes of preventable hearing loss in developing countries and it may have long-term impacts on the children. Several hospital-based cross-sectional studies have been conducted in East African countries to assess the prevalence of OM;however, no similar studies have been conducted in Somalia. Therefore, we conducted a hospital-based cross-sectional study to identify the prevalence and the underlying risk factors of OM among children under the age of five in Mogadishu, Somalia. Methodology: A hospital-based cross-sectional study was conducted from July 2022 to November 2022 at three main hospitals in Mogadishu, Somalia. A total of 384 children aged less than 5 years were included. Parents of these children were interviewed with a questionnaire and a clinical examination was performed for each child. The Statistical Package for Social Sciences, SPSS (Version 22, IBM, Inc.), was used for the statistical analysis. Result: The prevalence of otitis media among the 384 children recruited was 31.25% (120/384). Otitis media was significantly associated with age less than one year (P = 0.006), malnutrition (P Conclusion: In summary, the present study found that otitis media was highly prevalent (31.25%) in Mogadishu, Somalia. The majority of the affected children were younger than one year. Age of the child, malnutrition, upper respiratory tract infections, feeding in lying position, and dripping something into a child’s ear were found to significantly increase the risk of developing otitis media in children. In contrast, breastfeeding for more than one year has been found to reduce the risk of developing otitis media in children. 展开更多
关键词 Otitis Media Children under five Years PREVALENCE Risk Factors
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High Five昆虫细胞系的致瘤性研究 被引量:1
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作者 汪伟 周俊明 +3 位作者 王小敏 何孔旺 温立斌 倪艳秀 《中国实验动物学报》 CAS CSCD 北大核心 2017年第2期186-189,共4页
目的检测High Five昆虫细胞系对BALB/c裸鼠致瘤性情况,以确保其作为疫苗生产细胞株的安全性。方法将裸鼠随机分为5组,分别为High Five基础细胞库细胞试验组、High Five最高限制代次细胞试验组、HEp-2细胞阳性对照组、CEF细胞阴性对照组... 目的检测High Five昆虫细胞系对BALB/c裸鼠致瘤性情况,以确保其作为疫苗生产细胞株的安全性。方法将裸鼠随机分为5组,分别为High Five基础细胞库细胞试验组、High Five最高限制代次细胞试验组、HEp-2细胞阳性对照组、CEF细胞阴性对照组和不作任何处理的空白对照组,用细胞悬液背部皮下接种裸鼠。3周和12周后对裸鼠解剖及病理组织学检查,其是否有肿瘤形成。结果阳性对照HEp-2细胞组裸鼠接种后3周注射部位形成结节,病理组织学检查为鳞状细胞癌;阴性对照CEF细胞组和High Five细胞组均无结节形成,接种后12周经解剖用病理组织学检查,均无肿瘤形成。结论基础代次和最高限制代次High Five细胞均不具有致瘤性,可安全地应用于疫苗生产。 展开更多
关键词 致瘤性 裸鼠 HIGH five细胞
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Cultural Interpretation of the Landscape Environment of "Five Zen-Mountains" 被引量:1
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作者 董军 何礼平 《Journal of Landscape Research》 2009年第12期71-76,共6页
'Five Zen-Mountains' are the five temples of Zen designated as the royal court of Southern Song Dynasty. As the typical representatives of South Temples, they play an important part in the history of Chinese B... 'Five Zen-Mountains' are the five temples of Zen designated as the royal court of Southern Song Dynasty. As the typical representatives of South Temples, they play an important part in the history of Chinese Buddhism. 'Five Mountains' are the masterpieces of landscape construction with beautiful and attractive landscape environment. On the basis of the in-depth study of the general rule of 'Five Mountains' landscape environment, this research sums up the geomancy concept, landscape worship concept, aesthetic concept and the inner ideology which are hidden behind the landscape environment. 展开更多
关键词 five Zen-Mountains LANDSCAPE environment CULTURAL INTERPRETATION
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Big-Five人格维度对顶岗实习满意度影响实证研究 被引量:1
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作者 高道友 《新余学院学报》 2016年第2期123-128,共6页
现有的顶岗实习满意度研究文献忽视了实习生的人格差异可能带来的各种影响,学生被视作无形的、无个性的、不假思索地从事实习活动的行为者,其人格特质与其实习满意度之间的联系仍是一个尚未研究的领域。采用因子分析和回归分析方法实证... 现有的顶岗实习满意度研究文献忽视了实习生的人格差异可能带来的各种影响,学生被视作无形的、无个性的、不假思索地从事实习活动的行为者,其人格特质与其实习满意度之间的联系仍是一个尚未研究的领域。采用因子分析和回归分析方法实证检验了学生的Big-Five人格维度对其实习满意度的影响,研究结果表明Big-Five人格维度是顶岗实习满意度的重要预测因素,高"情绪稳定性"、"宜人性"和"想象力"的学生具有更高水平的实习满意度。 展开更多
关键词 人格 Big-five人格维度 顶岗实习 满意度
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Review on Drought Disasters in the Five Provinces of Northern China in 1920
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作者 王鑫宏 《Meteorological and Environmental Research》 CAS 2010年第4期87-91,共5页
This paper analyzed the severe drought that took place in the five provinces of Northern China in 1920.Study suggested that the severe damage caused by the drought was resulted from many reasons,such as certain specif... This paper analyzed the severe drought that took place in the five provinces of Northern China in 1920.Study suggested that the severe damage caused by the drought was resulted from many reasons,such as certain specific natural conditions,deterioration of ecological environment,malformations of the rural economy and turbulence of domestic politics.However,some new phenomena took shapes during this time disaster relief activity. 展开更多
关键词 1920 five provinces in northern China DROUGHT Characteristics Cause of formation Disaster relief China
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Five Safes安全框架及其对我国图书馆领域敏感数据安全访问的启示 被引量:8
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作者 周秀霞 刘万国 +1 位作者 隋会民 陈红岩 《情报理论与实践》 CSSCI 北大核心 2020年第3期85-90,共6页
[目的/意义] Five Safes是当前较为科学的一种结构化的敏感数据安全访问框架,被广泛应用于敏感数据安全访问的描述、评估、规划、培训和监管等方面,我国图书馆领域敏感数据的安全访问可借鉴其应用经验,提高图书馆领域敏感数据的安全使用... [目的/意义] Five Safes是当前较为科学的一种结构化的敏感数据安全访问框架,被广泛应用于敏感数据安全访问的描述、评估、规划、培训和监管等方面,我国图书馆领域敏感数据的安全访问可借鉴其应用经验,提高图书馆领域敏感数据的安全使用。[方法/过程]通过对Five Safes安全框架应用情况的调研、分析,归纳研究主题,并进行论述。[结果/结论]应用Five Safes安全框架,图书馆领域应提高敏感数据的共享意识,科学规划敏感数据的安全访问,合理地进行数据敏感度分级,加强对用户数据访问的试验应用和监控,通过培训提高用户的合规思维,从而全面提高图书馆领域敏感数据安全使用水平。 展开更多
关键词 five Safes安全框架 数据安全访问 安全风险 敏感数据 图书馆领域
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Five-dimensional teleparallel theory equivalent to general relativity,the axially symmetric solution,energy and spatial momentum
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作者 Gamal G.L.Nashed 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第11期102-109,共8页
A theory of (4+1)-dimensional gravity is developed on the basis of the teleparallel theory equivalent to general relativity. The fundamental gravitational field variables are the five-dimensional vector fields (pe... A theory of (4+1)-dimensional gravity is developed on the basis of the teleparallel theory equivalent to general relativity. The fundamental gravitational field variables are the five-dimensional vector fields (pentad), defined globally on a manifold M, and gravity is attributed to the torsion. The Lagrangian density is quadratic in the torsion tensor. We then give the exact five-dimensional solution. The solution is a generalization of the familiar Schwarzschild and Kerr solutions of the four-dimensional teleparallel equivalent of general relativity. We also use the definition of the gravitational energy to calculate the energy and the spatial momentum. 展开更多
关键词 five-dimensional teleparallel equivalent of general relativity five-dimensional solution energy and spatial momentum
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On“The Five-Step Method”in Teaching Junior English for China 被引量:1
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作者 黄金岩 《湖南工业大学学报(社会科学版)》 1997年第1期48-50,共3页
Junior English for China’ is based on the ’Five-Step’ teachingmethod: Revision, Presentation, Drilling, Practice, Consolidation. Each step has itsown particular methodology and requires the teacher to adopt a certa... Junior English for China’ is based on the ’Five-Step’ teachingmethod: Revision, Presentation, Drilling, Practice, Consolidation. Each step has itsown particular methodology and requires the teacher to adopt a certain role. Thispaper is a discussion of the "Five-Step Method". 展开更多
关键词 The five-Step Method JUNIOR English for China REVISION PRESENTATION DRILLING Practice CONSOLIDATION
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Five-year sequential changes in secondary antibiotic resistance of Helicobacter pylori in Taiwan 被引量:3
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作者 I-Ting Wu Seng-Kee Chuah +14 位作者 Chen-Hsiang Lee Chih-Ming Liang Lung-Sheng Lu Yuan-Hung Kuo Yi-Hao Yen Ming-Luen Hu Yeh-Pin Chou Shih-Cheng Yang Chung-Mou Kuo Chung-Huang Kuo Chun-Chih Chien Yu-Shao Chiang Shue-Shian Chiou Tsung-Hui Hu Wei-Chen Tai 《World Journal of Gastroenterology》 SCIE CAS 2015年第37期10669-10674,共6页
AIM: To determine changes in the antibiotic resistance of Helicobacter pylori(H. pylori) in southern Taiwan after failure of first-line standard triple therapy.METHODS: We analyzed 137 H. pylori-infected isolates from... AIM: To determine changes in the antibiotic resistance of Helicobacter pylori(H. pylori) in southern Taiwan after failure of first-line standard triple therapy.METHODS: We analyzed 137 H. pylori-infected isolates from patients who experienced eradication failure after standard first-line triple therapy from January2010 to December 2014. The H. pylori strains were tested for susceptibility to amoxicillin, clarithromycin,levofloxacin, metronidazole and tetracycline using the E-test method. The minimal inhibitory concentration(MIC) was determined by the agar dilution test.MIC values of ≥ 0.5, ≥ 1, ≥ 1, ≥ 4 and ≥ 8 mg/L were considered to be the resistance breakpoints for amoxicillin, clarithromycin, levofloxacin, tetracycline and metronidazole, respectively.RESULTS: A high resistance rate was found for clarithromycin(65%-75%) and metronidazole(30%-40%)among patients who failed first-line standard therapy.The resistance levels to amoxicillin and tetracycline remained very low; however, levofloxacin resistance was as high as 37.5% in 2010 but did not increase any further during the past 5 years. The rates of resistance to these antibiotics did not show a statistically significant upward or downward trend.CONCLUSION: Antibiotic resistance of H. pylori remains a problem for the effective eradication of this pathogen and its associated diseases in Taiwan. High clarithromycin resistance indicated that this antibiotic should not be prescribed as a second-line H. pylori eradication therapy. Moreover, levofloxacin-based second-line therapy should be used cautiously, and the local resistance rates should be carefully monitored. 展开更多
关键词 HELICOBACTER PYLORI Antibiotic resistance five-yea
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The Numerical Simulation of the Flow Field in a Cold Model of Five-stage Cyclone Preheater and Precalciner System 被引量:4
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作者 陈思维 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第2期99-101,共3页
The flow field in a cold model of 2500 t/d five-stage cyclone preheater and precalciner system was numerically simulated. Renault stress model (RSM) turbulent model was adopted to simulate the flow field, and a hybrid... The flow field in a cold model of 2500 t/d five-stage cyclone preheater and precalciner system was numerically simulated. Renault stress model (RSM) turbulent model was adopted to simulate the flow field, and a hybrid mesh scheme was selected to generate calculation mesh. With the first order upwind difference, finite-volume method was used to convert turbulent equations into difference equations pressure-velocity coupling which were solved by the classic simple algorithm, and during the course of numerical solution, mesh self-adapting technology was applied. The main flow field structures of the whole system and each part of the cold model were studied by analyzing the simulation results. 展开更多
关键词 CYCLONE PREHEATER five-stage cyclone preheater and precalciner
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Spindle Thermal Error Optimization Modeling of a Five-axis Machine Tool 被引量:6
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作者 Qianjian GUO Shuo FAN +3 位作者 Rufeng XU Xiang CHENG Guoyong ZHAO Jianguo YANG 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第3期746-753,共8页
Aiming at the problem of low machining accu- racy and uncontrollable thermal errors of NC machine tools, spindle thermal error measurement, modeling and compensation of a two turntable five-axis machine tool are resea... Aiming at the problem of low machining accu- racy and uncontrollable thermal errors of NC machine tools, spindle thermal error measurement, modeling and compensation of a two turntable five-axis machine tool are researched. Measurement experiment of heat sources and thermal errors are carried out, and GRA(grey relational analysis) method is introduced into the selection of tem- perature variables used for thermal error modeling. In order to analyze the influence of different heat sources on spindle thermal errors, an ANN (artificial neural network) model is presented, and ABC(artificial bee colony) algorithm is introduced to train the link weights of ANN, a new ABC- NN(Artificial bee colony-based neural network) modeling method is proposed and used in the prediction of spindle thermal errors. In order to test the prediction performance of ABC-NN model, an experiment system is developed, the prediction results of LSR (least squares regression), ANN and ABC-NN are compared with the measurement results of spindle thermal errors. Experiment results show that the prediction accuracy of ABC-NN model is higher than LSR and ANN, and the residual error is smaller than 3 pm, the new modeling method is feasible. The proposed research provides instruction to compensate thermal errors and improve machining accuracy of NC machine tools. 展开更多
关键词 five-axis machine tool Artificial bee colony Thermal error modeling Artificial neural network
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Monitoring result analyses of high slope of five-step ship lock in the Three Gorges Project 被引量:4
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作者 Qixiang Fan Hongbing Zhu Jun Gen 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2015年第2期199-206,共8页
The construction of the double-lane five-step ship lock of the Three Gorges Project (TGP) wascommenced in 1994, the excavation of the ship lock was completed by the end of 1999, and the ship lockwas put in operation... The construction of the double-lane five-step ship lock of the Three Gorges Project (TGP) wascommenced in 1994, the excavation of the ship lock was completed by the end of 1999, and the ship lockwas put in operation in June 2003. The side slopes of the ship lock are characterized by great height(170 m), steepness (70 m in height of upright slope), and great length (over 7000 m in total length). Inassociation with the ship lock, the surrounding rocks in slope have a high potential to deform, withwhich the magnitude of deformation is restricted. Monitoring results show that the deformation of thefive-step ship lock high slopes of the TGP primarily occurred in excavation period, and deformationtended to be stable and convergent during operation period, suggesting the allowable ranges of deformation.At present, the slopes and lock chambers are stable, and the ship lock works well under normaloperation condition, enabling the social and economic benefits of the TGP. 2015 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting byElsevier B.V. All rights reserved. 展开更多
关键词 Three Gorges Project(TGP) five-step ship lock SLOPE Monitoring analysis
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Identification of Kinematic Errors of Five-axis Machine Tool Trunnion Axis from Finished Test Piece 被引量:3
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作者 ZHANG Ya FU Jianzhong CHEN Zichen 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第5期999-1007,共9页
Compared with the traditional non-cutting measurement,machining tests can more accurately reflect the kinematic errors of five-axis machine tools in the actual machining process for the users.However,measurement and c... Compared with the traditional non-cutting measurement,machining tests can more accurately reflect the kinematic errors of five-axis machine tools in the actual machining process for the users.However,measurement and calculation of the machining tests in the literature are quite difficult and time-consuming.A new method of the machining tests for the trunnion axis of five-axis machine tool is proposed.Firstly,a simple mathematical model of the cradle-type five-axis machine tool was established by optimizing the coordinate system settings based on robot kinematics.Then,the machining tests based on error-sensitive directions were proposed to identify the kinematic errors of the trunnion axis of cradle-type five-axis machine tool.By adopting the error-sensitive vectors in the matrix calculation,the functional relationship equations between the machining errors of the test piece in the error-sensitive directions and the kinematic errors of C-axis and A-axis of five-axis machine tool rotary table was established based on the model of the kinematic errors.According to our previous work,the kinematic errors of C-axis can be treated as the known quantities,and the kinematic errors of A-axis can be obtained from the equations.This method was tested in Mikron UCP600 vertical machining center.The machining errors in the error-sensitive directions can be obtained by CMM inspection from the finished test piece to identify the kinematic errors of five-axis machine tool trunnion axis.Experimental results demonstrated that the proposed method can reduce the complexity,cost,and the time consumed substantially,and has a wider applicability.This paper proposes a new method of the machining tests for the trunnion axis of five-axis machine tool. 展开更多
关键词 five-axis machine tool kinematic errors trunnion axis test piece error-sensitive directions
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THE INFLUENCE OF ELECTRO-ACUPUNCTURE AT NEIGUAN AND FIVE SHU POINTS OF TWELVE REGULAR MERIDIANS AT DIFFERENT TIME ON SYSTOLIC TIME INTERVAL OF NORMAL YOUNG ADULTS 被引量:2
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作者 Li Lei, Chen Hanping, Xi Yongjiang, Gu JieShanghai University of TCM, Shanghai 200032, China 《World Journal of Acupuncture-Moxibustion》 1994年第1期40-45,共6页
The influence of electro-acupuncture at Neiguan (PC 6)and five shu points of twelve regular meridians at different time on systolic time interval (ST I) of normal young adultswere studied with 6×6 Latin square de... The influence of electro-acupuncture at Neiguan (PC 6)and five shu points of twelve regular meridians at different time on systolic time interval (ST I) of normal young adultswere studied with 6×6 Latin square design in this work.In 12 groups according to 12 regular merldlans,the STIs were measured respectively just before and after electro-acupuncture on Neiguan andfive shu points at 00:00,04:00,08:00,12:00,16:00 and 20:00 of a day.It was found thatexcept the PEPI and PEPI/LVETI ratio among Shenmen(HT 7),Shaochong(HT 9)and Neiguan,Guanchong(TE)and Yemen(TE 2)points,the effects of electro-acupuncture at Neiguan pointand five shu points of twelve regular meridians on the indices of STI of normal young adults wereshowing no slgnificant differences.There also was no difference in different sex.But the indices ofSTI were changed when electroacupuncture on the different points of different meridians at differenttime. 展开更多
关键词 ELECTRO-ACUPUNCTURE NEIGUAN five Shu points SYSTOLIC time interval
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Evaluation and Validation of Equivalent Five-Parameter Model Performance for Photovoltaic Panels Using Only Reference Data 被引量:3
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作者 Nouar Aoun Rachid Chenni +1 位作者 Boukheit Nahman Kada Bouchouicha 《Energy and Power Engineering》 2014年第9期235-245,共11页
This paper presents the modeling of electrical I-V verification of photovoltaic modules using five-parameter models based on the minimum usage of input data, which are usually provided by manufacturer’s datasheet. Ho... This paper presents the modeling of electrical I-V verification of photovoltaic modules using five-parameter models based on the minimum usage of input data, which are usually provided by manufacturer’s datasheet. However, we vary them with a step of 10-4, the ideality factor between 0.0 and 4 for each iteration in order to choose the value, which gives a minimal relative error of the maximum power point. Moreover, when is known, the other four parameters (i.e., Rs, I0, Iph and Rsh) are known. Finally, the effectiveness of this approach is then validated through comparison of the experimental results data under outdoor weather conditions. 展开更多
关键词 Photovoltaic five-Parameters Mono-Crystalline RELATIVE Error IDEALITY Factor
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A Coding and Automatic Error-Correction Circuit Based on the Five-Particle Entangled State 被引量:4
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作者 Xi Chen Pei Zhang Xiaoqing Zhou 《ZTE Communications》 2013年第3期41-45,共5页
In this paper, we discuss the concepts of quantum coding and error correction for a five-particle entangled state. Error correction can correct bit-reverse or phase-flip errors of one and two quantum states and is no ... In this paper, we discuss the concepts of quantum coding and error correction for a five-particle entangled state. Error correction can correct bit-reverse or phase-flip errors of one and two quantum states and is no longer limited to only one quantum state. We encode a single quantum state into a five-particle entangled state before being transferred to the sender. We designed an automatic error-correction circuit to correct errors caused by noise. We also simplify the design process for a multiple quantum error-correction circuit. We compare error-correction schemes for five and three entangled particles in terms of efficiency and capabilities. The results show that error-correction efficiency and fidelity are im- proved. 展开更多
关键词 quantum communication channel coding five-particle entangled state FIDELITY
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Synthesis of Five-coordinated Anionic Tin(Ⅳ) Complexes and Crystal Structure of [(i-Pr)_2NH_2][PhSn( μ~2-SCH_2COO)_2] 被引量:2
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作者 ZHONGGui-yun SONGHai-bin XIEQing-lan SUNLi-juan 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2004年第3期274-276,共3页
Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of dif... Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of different organic bases and characterized by means of IR, 1H NMR and MS spectroscopies. The crystal structure of [( i -Pr)_2NH_2] [PhSn( μ 2-SCH_2COO)_2] was determined by X-ray diffraction. In the crystal structure,the tin atom is five-coordinated and exists in trigonal bipyramid geometry with cell parameters a =1.1766(11) nm, b =1.3144(14) nm, c =1.3336(15) nm,β =90° and Z =4. 展开更多
关键词 five-coordinated tin(Ⅳ) complex Ionic organotin Crystal structure
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The sensitivity of the array resistivity log to mud filtrate invasion and its primary five-parameter inversion for improved oil water recognition 被引量:3
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作者 Deng Shaogui Sun Qingtao +2 位作者 Li Hu Huo Ningning He Xuquan 《Petroleum Science》 SCIE CAS CSCD 2012年第3期295-302,共8页
In order to improve reservoir fluid recognition, the sensitivity of array resistivity response to the difference of the invasion properties in both oil-bearing layers and water layers is analyzed. Then the primary inv... In order to improve reservoir fluid recognition, the sensitivity of array resistivity response to the difference of the invasion properties in both oil-bearing layers and water layers is analyzed. Then the primary inversion is carried out based on the array resistivity log. The mud invasion process is numerically simulated based on the oil-water flow equation and water convection diffusion equation. The results show that the radial resistivity of a fresh mud-invaded oil-bearing layer presents complex distribution characteristics, such as nonlinear increase, increasing to decreasing and low resistivity annulus, and the resistive invasion profile of a water layer is monotonic. Under specific conditions, array resistivity log can reflect these changes and the array induction log is more sensitive. Nevertheless, due to the effect of factors like large invasion depth, reservoir physical and oil-bearing properties, the measured apparent resistivity may differ greatly from the actual mud filtrate invasion profile in an oil-bearing layer. We proposed a five-parameter formation model to simulate the complex resistivity distribution of fresh mud-invaded formation. Then, based on the principle of non-linear least squares, the measured array resistivity log is used for inversion with the Marquardt method. It is demonstrated that the inverted resistivity is typically non-monotonic in oil-bearing layers and is monotonic in water layers. Processing of some field data shows that this is helpful in achieving efficient reservoir fluid recognition. 展开更多
关键词 Oil-water recognition mud filtrate invasion array resistivity log five-parameter inversion model
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Social determinants of under-five mortality in Ethiopia: Event history analysis using evidence from Ethiopian Demographic and Health Survey (EDHS) 被引量:2
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作者 Tariku Dejene Eshetu Girma 《Health》 2013年第5期879-884,共6页
Background: Under-five mortality is one of the indicators of the millennium development goals (MDGs) for the child mortality reduction goal. Understanding the social determinants of under-five mortality is helpful to ... Background: Under-five mortality is one of the indicators of the millennium development goals (MDGs) for the child mortality reduction goal. Understanding the social determinants of under-five mortality is helpful to narrow the gap between different social classes. Therefore, this study focused on the social determinants of under-five mortality inEthiopiausing EDHS 2011 data. Methods: The data source for this analysis was the 2011 EDHS which was undertaken over a five-month period from 27 December, 2010 to 3 June, 2011. The sample was selected using a stratified, two-stage cluster design. Samples of 16,515 women of reproductive age were interviewed. The questionnaire used to collect information from these women who?had among other things such as?background characteristics of women, birth history of these women and the survival of each birth at the time of the interview. Births that had occurred to women in the last 10 years prior to the date of the?interview were extracted for the analysis. Descriptive statistical methods were used to describe the distribution of the characteristics of the data. Kaplan Meier plots and incidence rates per 1000 person years were used to compare survival across different categories of the risk factors. The effect of the risk factors on survival was analyzed using Cox proportional hazards regression. Data management and analysis were carried out using STATA 10. Results: A total of 23,581 under-five children were included in the study. The under-five mortality incidence rate in Ethiopia for the last ten years was 29.6 per 1000 person years. Maternal education beyond primary level of education reduced the risk of under-five mortality by about half. A significant reduction in risk of under-five mortality was observed among births to mothers residing in richest households. The hazard ratio (HR) was higher for under-five mortality among boys than daughters, twins than singleton, teen age mother than higher ages and short births than optimal. Conclusions: Empowering mothers with education and making them productive for improving their income are important aspects for reducing under-five mortality. Emerging regions were disadvantaged on the incidence of under-five mortality;however, there was a positive result in narrowing the urban-rural under-five mortality risks. Being teenage mother at birth, short birth interval and twin births were identified risk factors for increased under-five mortality in Ethiopia. Interventions targeted at empowering women and much effort in emerging regions are required. Preventing teenage motherhood and promoting optimal birth spacing are also required to reduce under-five mortality in Ethiopia. 展开更多
关键词 Under-five MORTALITY SOCIAL Determinants DHS Ethiopia
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