The load and corrosion caused by the harsh marine environment lead to the severe degradation of offshore equipment and to their compromised security and reliability. In the quantitative risk analysis, the failure mode...The load and corrosion caused by the harsh marine environment lead to the severe degradation of offshore equipment and to their compromised security and reliability. In the quantitative risk analysis, the failure models are difficult to establish through traditional statistical methods. Hence, the calculation of the occurrence probability of small sample events is often met with great uncertainty. In this study, the Bayesian statistical method is implemented to analyze the oil and gas leakages of FPSO internal turret, which is a typical small sample risk but could lead to severe losses.According to the corresponding failure mechanism, two Bayesian statistical models using the Weibull distribution and logarithmic normal distribution as the population distribution are established, and the posterior distribution of the corresponding parameters is calculated. The optimal Bayesian statistical model is determined according to the Bayesian information criterion and Akaike criterion. On the basis of the determined optimal model, the corresponding reliability index is solved to provide basic data for the subsequent risk assessments of FPSO systems.展开更多
Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rule...Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions,and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters,i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol,86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes.展开更多
Focusing on research perspectives and methods,this paper reviews the main research on discourse analysis about how society affect courtroom discourse in nearly recent 30 years.The research shows that courtroom discour...Focusing on research perspectives and methods,this paper reviews the main research on discourse analysis about how society affect courtroom discourse in nearly recent 30 years.The research shows that courtroom discourse analysis has a trend of diversified research perspectives and research methods which formerly aimed at the static,single and conventional social factors,now it comes to concern about the dynamic,interactive,and occasional ones.Social behavior theory is an emerging and unique member of it.展开更多
Based on the Grey system theory,thispaper establishes the Grey model for suitability ofinternational standards for Chinese industries.Wealso discuss the methods of determining the level ofsuitability and the applicati...Based on the Grey system theory,thispaper establishes the Grey model for suitability ofinternational standards for Chinese industries.Wealso discuss the methods of determining the level ofsuitability and the application of the Grey model inadopting international standards.展开更多
Objective: To explore the concept of adherence in the context of rehabilitation of patients with chronic illnesses. This concept analysis is helpful in predicting health behaviors and intentions including physical act...Objective: To explore the concept of adherence in the context of rehabilitation of patients with chronic illnesses. This concept analysis is helpful in predicting health behaviors and intentions including physical activity and dietary behaviors in patients with chronic illnesses. Methods: The framework of Walker and Avant was used to analyze the concept of adherence. Results: Adherence is defined as the extent to which a person’s behavior, such as taking medication, following a diet, and/or executing lifestyle changes, corresponds to agreed recommendations from a health-care provider. The antecedents of adherence are the biomedical status of the individual, social support, self-efficacy, and education. Self-report questionnaires and patient self-reporting are the most common measurement tools of adherence. Thus, the reliable and valid instrument of monitoring adherence in the clinical settings is challenging. Conclusions: Analyzing the concept of adherence is necessary to help understand how best to promote adherence to improve healthrelated outcomes.展开更多
Internet is a magical world, many treasures can be found there. Internet is also an important tool in our work, study and daily lives. Compared with paper textbooks and encyclopedias, learning English online has becom...Internet is a magical world, many treasures can be found there. Internet is also an important tool in our work, study and daily lives. Compared with paper textbooks and encyclopedias, learning English online has become the best choice for its large amount of information and strong interactivity. What's more, it is scientific, advanced, intuitive, vivid, interesting and up?date soon. This thesis will apply Theory of Behaviorism and Theory of Structuralism to English podcasting, learning websites,BBS, radio on line and chatting –room in order to reinforce a positive cycle for the net-based English learners.展开更多
Although information behavior and informetrics are very popular in the field of Information Science,they have seldom been combined in empirical studies.It is worth trying to study citing behavior from the perspective ...Although information behavior and informetrics are very popular in the field of Information Science,they have seldom been combined in empirical studies.It is worth trying to study citing behavior from the perspective of informetrics.展开更多
基金financially supported by the National International Science and Technology Cooperation Specific Projectthe Development of Risk Assessment Software for Floating Offshore Wind Turbine(Grant No.2013DFE73060)the Development of Failure Database and Risk Assessment System for FPSO(Grant No.G014614002)
文摘The load and corrosion caused by the harsh marine environment lead to the severe degradation of offshore equipment and to their compromised security and reliability. In the quantitative risk analysis, the failure models are difficult to establish through traditional statistical methods. Hence, the calculation of the occurrence probability of small sample events is often met with great uncertainty. In this study, the Bayesian statistical method is implemented to analyze the oil and gas leakages of FPSO internal turret, which is a typical small sample risk but could lead to severe losses.According to the corresponding failure mechanism, two Bayesian statistical models using the Weibull distribution and logarithmic normal distribution as the population distribution are established, and the posterior distribution of the corresponding parameters is calculated. The optimal Bayesian statistical model is determined according to the Bayesian information criterion and Akaike criterion. On the basis of the determined optimal model, the corresponding reliability index is solved to provide basic data for the subsequent risk assessments of FPSO systems.
基金Supported by the National Natural Science Foundation of China(21276132)the Transformation Project of Scientific and Technological Achievements of Qingdao(16-6-2-50-nsh)
文摘Gas–liquid multiphase flow is a significant phenomenon in chemical processes. The rising behaviors of single bubbles in the quiescent liquids have been investigated but the internal flow patterns and deformation rules of bubbles, which influence the mass transfer efficiency to a large extent, have received much less attention. In this paper, the volume of fluid method was used to calculate the bubble shapes, pressure, velocity distributions,and the flow patterns inside the bubbles. The rising behavior of the bubbles with four different initial diameters,i.e., 3 mm, 5 mm, 7 mm and 9 mm was investigated in four various liquids including water, 61.23% glycerol,86.73% glycerol and 100% glycerol. The results show that the liquid properties and bubble initial diameters have great impacts on bubble shapes. Moreover, flow patterns inside the bubbles with different initial diameters were analyzed and classified into three types under the condition of different bubble shapes. Three correlations for predicting the maximum internal circulation inside the bubbles in 86.73% glycerol were presented and the R-square values were all bigger than 0.98. Through analyzing the pressure and velocity distributions around the bubbles, four rules of bubble deformation were also obtained to explain and predict the shapes.
文摘Focusing on research perspectives and methods,this paper reviews the main research on discourse analysis about how society affect courtroom discourse in nearly recent 30 years.The research shows that courtroom discourse analysis has a trend of diversified research perspectives and research methods which formerly aimed at the static,single and conventional social factors,now it comes to concern about the dynamic,interactive,and occasional ones.Social behavior theory is an emerging and unique member of it.
文摘Based on the Grey system theory,thispaper establishes the Grey model for suitability ofinternational standards for Chinese industries.Wealso discuss the methods of determining the level ofsuitability and the application of the Grey model inadopting international standards.
文摘Objective: To explore the concept of adherence in the context of rehabilitation of patients with chronic illnesses. This concept analysis is helpful in predicting health behaviors and intentions including physical activity and dietary behaviors in patients with chronic illnesses. Methods: The framework of Walker and Avant was used to analyze the concept of adherence. Results: Adherence is defined as the extent to which a person’s behavior, such as taking medication, following a diet, and/or executing lifestyle changes, corresponds to agreed recommendations from a health-care provider. The antecedents of adherence are the biomedical status of the individual, social support, self-efficacy, and education. Self-report questionnaires and patient self-reporting are the most common measurement tools of adherence. Thus, the reliable and valid instrument of monitoring adherence in the clinical settings is challenging. Conclusions: Analyzing the concept of adherence is necessary to help understand how best to promote adherence to improve healthrelated outcomes.
文摘Internet is a magical world, many treasures can be found there. Internet is also an important tool in our work, study and daily lives. Compared with paper textbooks and encyclopedias, learning English online has become the best choice for its large amount of information and strong interactivity. What's more, it is scientific, advanced, intuitive, vivid, interesting and up?date soon. This thesis will apply Theory of Behaviorism and Theory of Structuralism to English podcasting, learning websites,BBS, radio on line and chatting –room in order to reinforce a positive cycle for the net-based English learners.
文摘Although information behavior and informetrics are very popular in the field of Information Science,they have seldom been combined in empirical studies.It is worth trying to study citing behavior from the perspective of informetrics.
