Krashen's affective filter theory drew researchers' attention to the fresh field of internal factors of learners.But researchers seem to pay too much attention to the other factors while tending to neglect a f...Krashen's affective filter theory drew researchers' attention to the fresh field of internal factors of learners.But researchers seem to pay too much attention to the other factors while tending to neglect a factor that we cannot afford to play down in language learning research-self-confidence.This paper is designed to discuss the close relationship between self-confidence and some of the other important affective factors,and furthermore raise appropriate concern over self-confidence.展开更多
Self-confidence is closely related to L2 learning.In order to make their learners enjoy English learning,English teach ers need to strengthen the learners’English learning confidence.This article is to find out Engli...Self-confidence is closely related to L2 learning.In order to make their learners enjoy English learning,English teach ers need to strengthen the learners’English learning confidence.This article is to find out English teachers’role to strengthening learners’self-confidence in ELL by means of class observation.The writer concludes improving speaking ability;giving praise and offering gentle error correcting can help to strengthen the learners’confidence.展开更多
Economic and cultural globalization has strong impacts on the culture of each country.How to maintain the integrity of the local culture in the course of globalization and how to develop on the basis of the inheritanc...Economic and cultural globalization has strong impacts on the culture of each country.How to maintain the integrity of the local culture in the course of globalization and how to develop on the basis of the inheritance and innovation are the questions worthy of being studied.This paper firstly expounds the important meaning of cultural subjectivity in the view of cultural self-confidence,then explores the roots for the loss of cultural subjectivity consciousness and finally indicates the strategies of cultivating cultural subjectivity.Cultivating cultural subjectivity is an effective way to maintain the integrity of the local culture and the cultural self-confidence.展开更多
An important part of the "Belt and Road " Initiative is to achieve people-to-people bonds. People-to-people bonds are certainly based on cultural self-confidence and cultural self-awareness. Cultural self-co...An important part of the "Belt and Road " Initiative is to achieve people-to-people bonds. People-to-people bonds are certainly based on cultural self-confidence and cultural self-awareness. Cultural self-confidence is an important cultural strategy put forward by the party and the country in the vision of contemporary society,and an important deployment to realize the great rejuvenation of the Chinese nation. This paper first gives a brief overview of the advantages of cultural self-confidence in external communication,and then analyzes the opportunities and challenges that cultural self-confidence faces in external communication in the newera. Finally,it focuses on exploration on the external communication ways of cultural self-confidence in the "Belt and Road"Initiative. O nly based on the deep understanding of local culture can we can shape the soul of culture in the process of further opening-up and external communication to the outside world,and enhance the cultural self-aw areness of the people; build a solid foundation of culture and promote cultural exchanges with other countries.展开更多
It is no wonder that inquiring is an important skill. This paper deals with a research which was intended to see if respect and encouragement could solve the problem of students＇ self-confidence to inquire in the EFL...It is no wonder that inquiring is an important skill. This paper deals with a research which was intended to see if respect and encouragement could solve the problem of students＇ self-confidence to inquire in the EFL （English as a Foreign Language） classroom. The research involved a secondary group of students whose self-confidence to ask questions was considered low by the teacher and research collaborators. The data were collected through observation, questionnaire and interview. Based on a pre-observation, problem sources had been identified, i.e., the students were afraid of being thought of as ＂looking for sensation only＂, afraid that their classmates would laugh at them, worried of being judged as arrogant or pretentious, did not want to be considered stupid, and wondered if they could produce qualified questions. Teachers believed that fear of asking questions is part of the Indonesian students＇ culture. The research team agreed upon the way to handle the problem--by respect and encouragement procedure. The first session implementing the procedure was not successful enough in raising the students＇ self-confidence. Though students had already started to address some questions of this stage, their behaviors did not seem to be improved. They were still afraid, doubtful and unhappy with questioning, which were the signs of lacking of confidence. However, the next cycle was in general a success. The students＇ questions increased considerably. They looked more enthusiastic, passionate and happier in response to teachers＇ invitation to inquire, showing that their self-confidence for asking questions has developed.展开更多
The evolution in patient simulation as educational tool is being driven by a number of factors. Priority of patient safety, patient availability, and the ever increasing body of medical knowledge presents new challeng...The evolution in patient simulation as educational tool is being driven by a number of factors. Priority of patient safety, patient availability, and the ever increasing body of medical knowledge presents new challenges to curriculum planners. Student＇s satisfaction is an important element of the investigation of simulation learning environment efficacy. There are suggestions that student satisfaction may have some correlation with self-confidence and learning achievement. This is a prospective exploratory study that evaluates learners＇ satisfaction with simulation learning environment and self-conference utilized satisfaction with SSE （simulation experience scale） and pre and post simulation test for learning achievement. Participants was third-year medical students （n = 45） participating in their regular simulation-based session at Center of Excellence for Simulation Education and Innovation （CESEI）, University of British Columbia. A comparison between pre- and post-test results was conducted on the basis of t-test for related samples. Correlation was used to explore the relationships among students satisfaction with the simulation environment and students＇ self-confidence and achievement. The simulation exercise, completed by 45 students, increased correct test answers on average from 72% to 89% （P-Value 〈 0.0001 by paired t-test）. Increases in test results were between pre- and post- simulation identical multiple choice questions. The mean score for satisfaction with simulation environment items was 4.47, SD （0.45）, using a 5-point Likert scale with 5 = strongly agree, 4 = agree, 3 = neutral, 2 = disagree, and 1 = strongly disagree. The mean score for self-confidence in performing BLS, evaluating and managing acute cardiac patient was 3.83, SD （1.02）. For evaluating the relationship between students satisfaction with simulation learning environment and learning achievement, bivariate analysis revealed a significant positive relationship between satisfaction with simulation learning environment and learning achievement （Pearson r = 0.80, P-Value 〈 0.01）. The magnitude or strength of the correlation coefficient （r = 0.80） indicated satisfaction with simulation environment and learning achievement have a strong effect and positive correlation. Simulation learning environment for medical students is effective in improving students＇ overall comprehension and better learning achievements. Furthermore, students＇ basic clinical skills are improved associated with higher self-confidence.展开更多
'China should make greater contributions to mankind.'Such contributions are now to be found more and more on the level of global governance.As General Secretary Xi Jinping observed in his New Year Address of 2...'China should make greater contributions to mankind.'Such contributions are now to be found more and more on the level of global governance.As General Secretary Xi Jinping observed in his New Year Address of 2016,'the world is too big,and challenges are too many,to go without the voice from China being heard,without solution ideas from China being shared,without the involvement of China being needed'.展开更多
Deaf students are different from ordinary students. Their learning ability and understanding ability are affected by their own defects. They cannot receive timely guidance from teachers. They will feel very difficult ...Deaf students are different from ordinary students. Their learning ability and understanding ability are affected by their own defects. They cannot receive timely guidance from teachers. They will feel very difficult in the learning process. When they study together with other normal students, they will easily have inferiority complex, which is not conducive to their study and life. In dance teaching, teachers should do a good job in special education for deaf students, give more attention and patience, conduct targeted teaching, enhance deaf students' self-confidence in learning dance, and promote their physical and mental healthy growth.展开更多
The integration of Chinese medicine self-confidence into the ideological and political courses in colleges and universities of traditional Chinese medicine is an important plan for the reform and development of teachi...The integration of Chinese medicine self-confidence into the ideological and political courses in colleges and universities of traditional Chinese medicine is an important plan for the reform and development of teaching. It is also the main starting point for the cultivation of morality and the cultivation of talents. It is also an important measure for the development of traditional Chinese medicine towards characteristics. It integrates the cultural connotation of traditional Chinese medicine with the socialist core values, combines the historical evolution of traditional Chinese medicine culture with the development of modern culture, integrates teaching resources, jointly carries out design, strengthens practice development and innovates teaching strategies, and deeply integrates the confidence of traditional Chinese medicine with the ideological and political courses in traditional Chinese medicine colleges.展开更多
A group of asymmetric difference schemes to approach the Korteweg-de Vries （KdV） equation is given here. According to such schemes, the full explicit difference scheme and the full implicit one, an alternating segme...A group of asymmetric difference schemes to approach the Korteweg-de Vries （KdV） equation is given here. According to such schemes, the full explicit difference scheme and the full implicit one, an alternating segment explicit-implicit difference scheme for solving the KdV equation is constructed. The scheme is linear unconditionally stable by the analysis of linearization procedure, and is used directly on the parallel computer. The numerical experiments show that the method has high accuracy.展开更多
The numerical solution of large scale multi-dimensional convection diffusion equations often requires efficient parallel algorithms.In this work,we consider the extension of a recently proposed non-overlapping domain ...The numerical solution of large scale multi-dimensional convection diffusion equations often requires efficient parallel algorithms.In this work,we consider the extension of a recently proposed non-overlapping domain decomposition method for two dimensional time dependent convection diffusion equations with variable coefficients. By combining predictor-corrector technique,modified upwind differences with explicitimplicit coupling,the method under consideration provides intrinsic parallelism while maintaining good stability and accuracy.Moreover,for multi-dimensional problems, the method can be readily implemented on a multi-processor system and does not have the limitation on the choice of subdomains required by some other similar predictor-corrector or stabilized schemes.These properties of the method are demonstrated in this work through both rigorous mathematical analysis and numerical experiments.展开更多
Many engineering applications need to analyse the system dynamics on the macro and micro level,which results in a larger computational effort.An explicit-implicit asynchronous step algorithm is introduced to solve the...Many engineering applications need to analyse the system dynamics on the macro and micro level,which results in a larger computational effort.An explicit-implicit asynchronous step algorithm is introduced to solve the structural dynamics in multi-scale both the space domain and time domain.The discrete FEA model is partitioned into explicit and implicit parts using the nodal partition method.Multiple boundary node method is adopted to handle the interface coupled problem.In coupled region,the implicit Newmark coupled with an explicit predictor corrector Newmark whose predictive wave propagates into the implicit mesh.During the explicit subcycling process,the variables of boundary nodes are solved directly by dynamics equilibrium equation.The dissipation energy is dynamically determined in accordance with the energy balance checking.A cantilever beam and a building two numerical examples are proposed to verify that the method can greatly reduce the computing time while maintaining a high accuracy.展开更多
The solution of time-dependent hyperbolic conservation laws on cut cell meshes causes the small cell problem:standard schemes are not stable on the arbitrarily small cut cells if an explicit time stepping scheme is us...The solution of time-dependent hyperbolic conservation laws on cut cell meshes causes the small cell problem:standard schemes are not stable on the arbitrarily small cut cells if an explicit time stepping scheme is used and the time step size is chosen based on the size of the background cells.In May and Berger(J Sci Comput 71:919–943,2017),the mixed explicit-implicit approach in general and MUSCL-Trap(monotonic upwind scheme for conservation laws and trapezoidal scheme)in particular have been introduced to solve this problem by using implicit time stepping on the cut cells.Theoretical and numerical results have indicated that this might lead to a loss in accuracy when switching between the explicit and implicit time stepping.In this contribution,we examine this in more detail and will prove in one dimension that the specific combination MUSCL-Trap of an explicit second-order and an implicit second-order scheme results in a fully second-order mixed scheme.As this result is unlikely to hold in two dimensions,we also introduce two new versions of mixed explicit-implicit schemes based on exchanging the explicit scheme.We present numerical tests in two dimensions where we compare the new versions with the original MUSCL-Trap scheme.展开更多
The number of traditionally excellent coastal lithologic nuclear power plants is limited.It is a trend to develop nuclear power plants on soil sites in inland areas.Therefore,the seismic safety and adaptability of non...The number of traditionally excellent coastal lithologic nuclear power plants is limited.It is a trend to develop nuclear power plants on soil sites in inland areas.Therefore,the seismic safety and adaptability of non-rock nuclear power plant(NPP)sites are the key concerns of nuclear safety researchers.Although the five site categories are clearly defined in the AP1000 design control documents,the effects of nuclear power five site conditions and soil nonlinearity on the seismic response characteristics of nuclear island buildings have not been systematically considered in previous related studies.In this study,targeting the AP1000 nuclear island structure as the research object,three-dimensional finite element models of a nuclear island structure at five types of sites(firm rock site(FR),soft rock site(SR),soft-to-medium soil site(SMS),upper bound soft-to-medium site(SMS-UB),and soft soil site(SS))are established.The partitioned analysis method of soil-structure interaction(PASSI)in the time-domain is used to investigate the effects of site hardness and nonlinearity on the acceleration,displacement,and acceleration response spectrum of the nuclear island structure under seismic excitation.The incremental equilibrium equation and explicit decoupling method are used to analyze the soil nonlinearity described by the Davidenkov model with simplified loading-reloading rules.The results show that,in the linear case,with the increase of site hardness,the peak ground acceleration(PGA)and the peak of acceleration response spectrum of the nuclear island structure increase except for the FR site,while the maximum displacement decreases.In nonlinear analysis,as the site hardness increases,the PGA,maximum displacement,and the peak of acceleration response spectrum of the nuclear island structure increase.The peak value of the acceleration response spectrum in the nonlinear case is greater than that in the linear case for FR,while smaller for SR and soil sites.The site nonlinearity reduces the peak values of the response spectrum for SR and soil sites much more as the site hardness decreases.The results of this study can provide a reference for design of nuclear island structures on soil and rock sites.展开更多
Background: Patients expect nurses to be both technically competent and psychosocially skilled. Enhancing the quality of patient care and patient safety in healthcare settings has increased, resulting in limited oppor...Background: Patients expect nurses to be both technically competent and psychosocially skilled. Enhancing the quality of patient care and patient safety in healthcare settings has increased, resulting in limited opportunities for students to practice clinical skills in healthcare settings. Achieving competence in these skills is viewed as an essential task to be completed during the school curriculum. Objective: The purpose of this study was to evaluate the use of self-observation through cellular recordings as an adjunct to the clinical skills teaching of a blood sugar test to undergraduate nursing. Design: The research design consisted of pre- and post-test consecutive experimental design through a control group. Settings: This study targeted nursing students enrolled in baccalaureate programs running in Korea. Participant: The participants were 64 students including 34 for the experimental group and 30 for the control group. Methods: Those in the control group received standard teaching methods using lectures and skills classes and facilitated the use of self-study methods. Those in the experimental group received standard teaching using lectures and skills classes and facilitated use of cell phone recorded self-observation. The self-confidence of practicing a blood sugar test, satisfaction with the learning method, self-study participation, level of interest in nursing practice, and self-directed learning ability were measured using questionnaires. Results: Significant between-groups differences were detected in self-confidence of practicing a blood sugar test (t = 2.067, p = 0.043), satisfaction with the learning method (t = 2.818, p = 0.044), self-study participation (χ2 = 7.635, p = 0.022), and average self-directed learning ability (t = 3.202, p = 0.002). Conclusions: Self-observation through cellular phone recordings is an effective learning method as an adjunct to teach clinical skills.展开更多
Cultural self-confidence is the full affirmation and active practice of a people,a country and a political party of its own cultural value,and the firm confidence in its cultural vitality.As an important hub and windo...Cultural self-confidence is the full affirmation and active practice of a people,a country and a political party of its own cultural value,and the firm confidence in its cultural vitality.As an important hub and window for cultural exchanges between China and foreign countries,international Chinese education shoulders the important task of language and cultural propagation.In the mutual learning and exchanges between Chinese and foreign cultures,international Chinese education must insist on cultural self-confidence in teachers,teaching,teaching materials,etc.,"tell Chinese stories and spread Chinese voice",and show the world a rich,stereo,and vivid image of China.展开更多
On different occasions, you will face challenge in speaking. Good speaking can leave a favorable impression on the others. Exactly, trying to be a experienced speaker is a key to one's successful life or career. B...On different occasions, you will face challenge in speaking. Good speaking can leave a favorable impression on the others. Exactly, trying to be a experienced speaker is a key to one's successful life or career. But there are so many difficulties we would encounter in the process of speaking, thus how to develop a perfect speech is a sticking question for most of speakers. This article can help you to find ways to being a good speaker.展开更多
文摘Krashen's affective filter theory drew researchers' attention to the fresh field of internal factors of learners.But researchers seem to pay too much attention to the other factors while tending to neglect a factor that we cannot afford to play down in language learning research-self-confidence.This paper is designed to discuss the close relationship between self-confidence and some of the other important affective factors,and furthermore raise appropriate concern over self-confidence.
文摘Self-confidence is closely related to L2 learning.In order to make their learners enjoy English learning,English teach ers need to strengthen the learners’English learning confidence.This article is to find out English teachers’role to strengthening learners’self-confidence in ELL by means of class observation.The writer concludes improving speaking ability;giving praise and offering gentle error correcting can help to strengthen the learners’confidence.
基金one of the research achievements of 2018 Philosophy and Social Science Planning Project of Tianjin Municipality “Research on the Cultivation Model of College students’ Cultural Self-confidence from the Perspective of Intercultural Communication”(TJJX18-011)
文摘Economic and cultural globalization has strong impacts on the culture of each country.How to maintain the integrity of the local culture in the course of globalization and how to develop on the basis of the inheritance and innovation are the questions worthy of being studied.This paper firstly expounds the important meaning of cultural subjectivity in the view of cultural self-confidence,then explores the roots for the loss of cultural subjectivity consciousness and finally indicates the strategies of cultivating cultural subjectivity.Cultivating cultural subjectivity is an effective way to maintain the integrity of the local culture and the cultural self-confidence.
基金one of the research findings of Open Fund of“Research Center for Sustainable Development of Three Gorges Reservoir Area”in2016(No:16sxxyjd04).
文摘An important part of the "Belt and Road " Initiative is to achieve people-to-people bonds. People-to-people bonds are certainly based on cultural self-confidence and cultural self-awareness. Cultural self-confidence is an important cultural strategy put forward by the party and the country in the vision of contemporary society,and an important deployment to realize the great rejuvenation of the Chinese nation. This paper first gives a brief overview of the advantages of cultural self-confidence in external communication,and then analyzes the opportunities and challenges that cultural self-confidence faces in external communication in the newera. Finally,it focuses on exploration on the external communication ways of cultural self-confidence in the "Belt and Road"Initiative. O nly based on the deep understanding of local culture can we can shape the soul of culture in the process of further opening-up and external communication to the outside world,and enhance the cultural self-aw areness of the people; build a solid foundation of culture and promote cultural exchanges with other countries.
文摘It is no wonder that inquiring is an important skill. This paper deals with a research which was intended to see if respect and encouragement could solve the problem of students＇ self-confidence to inquire in the EFL （English as a Foreign Language） classroom. The research involved a secondary group of students whose self-confidence to ask questions was considered low by the teacher and research collaborators. The data were collected through observation, questionnaire and interview. Based on a pre-observation, problem sources had been identified, i.e., the students were afraid of being thought of as ＂looking for sensation only＂, afraid that their classmates would laugh at them, worried of being judged as arrogant or pretentious, did not want to be considered stupid, and wondered if they could produce qualified questions. Teachers believed that fear of asking questions is part of the Indonesian students＇ culture. The research team agreed upon the way to handle the problem--by respect and encouragement procedure. The first session implementing the procedure was not successful enough in raising the students＇ self-confidence. Though students had already started to address some questions of this stage, their behaviors did not seem to be improved. They were still afraid, doubtful and unhappy with questioning, which were the signs of lacking of confidence. However, the next cycle was in general a success. The students＇ questions increased considerably. They looked more enthusiastic, passionate and happier in response to teachers＇ invitation to inquire, showing that their self-confidence for asking questions has developed.
文摘The evolution in patient simulation as educational tool is being driven by a number of factors. Priority of patient safety, patient availability, and the ever increasing body of medical knowledge presents new challenges to curriculum planners. Student＇s satisfaction is an important element of the investigation of simulation learning environment efficacy. There are suggestions that student satisfaction may have some correlation with self-confidence and learning achievement. This is a prospective exploratory study that evaluates learners＇ satisfaction with simulation learning environment and self-conference utilized satisfaction with SSE （simulation experience scale） and pre and post simulation test for learning achievement. Participants was third-year medical students （n = 45） participating in their regular simulation-based session at Center of Excellence for Simulation Education and Innovation （CESEI）, University of British Columbia. A comparison between pre- and post-test results was conducted on the basis of t-test for related samples. Correlation was used to explore the relationships among students satisfaction with the simulation environment and students＇ self-confidence and achievement. The simulation exercise, completed by 45 students, increased correct test answers on average from 72% to 89% （P-Value 〈 0.0001 by paired t-test）. Increases in test results were between pre- and post- simulation identical multiple choice questions. The mean score for satisfaction with simulation environment items was 4.47, SD （0.45）, using a 5-point Likert scale with 5 = strongly agree, 4 = agree, 3 = neutral, 2 = disagree, and 1 = strongly disagree. The mean score for self-confidence in performing BLS, evaluating and managing acute cardiac patient was 3.83, SD （1.02）. For evaluating the relationship between students satisfaction with simulation learning environment and learning achievement, bivariate analysis revealed a significant positive relationship between satisfaction with simulation learning environment and learning achievement （Pearson r = 0.80, P-Value 〈 0.01）. The magnitude or strength of the correlation coefficient （r = 0.80） indicated satisfaction with simulation environment and learning achievement have a strong effect and positive correlation. Simulation learning environment for medical students is effective in improving students＇ overall comprehension and better learning achievements. Furthermore, students＇ basic clinical skills are improved associated with higher self-confidence.
文摘'China should make greater contributions to mankind.'Such contributions are now to be found more and more on the level of global governance.As General Secretary Xi Jinping observed in his New Year Address of 2016,'the world is too big,and challenges are too many,to go without the voice from China being heard,without solution ideas from China being shared,without the involvement of China being needed'.
文摘Deaf students are different from ordinary students. Their learning ability and understanding ability are affected by their own defects. They cannot receive timely guidance from teachers. They will feel very difficult in the learning process. When they study together with other normal students, they will easily have inferiority complex, which is not conducive to their study and life. In dance teaching, teachers should do a good job in special education for deaf students, give more attention and patience, conduct targeted teaching, enhance deaf students' self-confidence in learning dance, and promote their physical and mental healthy growth.
文摘The integration of Chinese medicine self-confidence into the ideological and political courses in colleges and universities of traditional Chinese medicine is an important plan for the reform and development of teaching. It is also the main starting point for the cultivation of morality and the cultivation of talents. It is also an important measure for the development of traditional Chinese medicine towards characteristics. It integrates the cultural connotation of traditional Chinese medicine with the socialist core values, combines the historical evolution of traditional Chinese medicine culture with the development of modern culture, integrates teaching resources, jointly carries out design, strengthens practice development and innovates teaching strategies, and deeply integrates the confidence of traditional Chinese medicine with the ideological and political courses in traditional Chinese medicine colleges.
基金Project supported by the National Natural Science Foundation of China(No.10671113)the Natural Science Foundation of Shandong Province of China(No.Y2003A04)
文摘A group of asymmetric difference schemes to approach the Korteweg-de Vries （KdV） equation is given here. According to such schemes, the full explicit difference scheme and the full implicit one, an alternating segment explicit-implicit difference scheme for solving the KdV equation is constructed. The scheme is linear unconditionally stable by the analysis of linearization procedure, and is used directly on the parallel computer. The numerical experiments show that the method has high accuracy.
基金the National Natural Science Foundation of China(No.10571017)supported in part by the National Natural Science Foundation of China(No.60533020)supported in part by NSF DMS 0712744
文摘The numerical solution of large scale multi-dimensional convection diffusion equations often requires efficient parallel algorithms.In this work,we consider the extension of a recently proposed non-overlapping domain decomposition method for two dimensional time dependent convection diffusion equations with variable coefficients. By combining predictor-corrector technique,modified upwind differences with explicitimplicit coupling,the method under consideration provides intrinsic parallelism while maintaining good stability and accuracy.Moreover,for multi-dimensional problems, the method can be readily implemented on a multi-processor system and does not have the limitation on the choice of subdomains required by some other similar predictor-corrector or stabilized schemes.These properties of the method are demonstrated in this work through both rigorous mathematical analysis and numerical experiments.
基金supported by the National Key Research and Development Program of China(2016YFB0201800)the National Natural Science Foundation of China(No.51475287 and No.11772192).
文摘Many engineering applications need to analyse the system dynamics on the macro and micro level,which results in a larger computational effort.An explicit-implicit asynchronous step algorithm is introduced to solve the structural dynamics in multi-scale both the space domain and time domain.The discrete FEA model is partitioned into explicit and implicit parts using the nodal partition method.Multiple boundary node method is adopted to handle the interface coupled problem.In coupled region,the implicit Newmark coupled with an explicit predictor corrector Newmark whose predictive wave propagates into the implicit mesh.During the explicit subcycling process,the variables of boundary nodes are solved directly by dynamics equilibrium equation.The dissipation energy is dynamically determined in accordance with the energy balance checking.A cantilever beam and a building two numerical examples are proposed to verify that the method can greatly reduce the computing time while maintaining a high accuracy.
文摘The solution of time-dependent hyperbolic conservation laws on cut cell meshes causes the small cell problem:standard schemes are not stable on the arbitrarily small cut cells if an explicit time stepping scheme is used and the time step size is chosen based on the size of the background cells.In May and Berger(J Sci Comput 71:919–943,2017),the mixed explicit-implicit approach in general and MUSCL-Trap(monotonic upwind scheme for conservation laws and trapezoidal scheme)in particular have been introduced to solve this problem by using implicit time stepping on the cut cells.Theoretical and numerical results have indicated that this might lead to a loss in accuracy when switching between the explicit and implicit time stepping.In this contribution,we examine this in more detail and will prove in one dimension that the specific combination MUSCL-Trap of an explicit second-order and an implicit second-order scheme results in a fully second-order mixed scheme.As this result is unlikely to hold in two dimensions,we also introduce two new versions of mixed explicit-implicit schemes based on exchanging the explicit scheme.We present numerical tests in two dimensions where we compare the new versions with the original MUSCL-Trap scheme.
基金National Natural Science Foundation of China under Grant Nos.51978337 and U2039209。
文摘The number of traditionally excellent coastal lithologic nuclear power plants is limited.It is a trend to develop nuclear power plants on soil sites in inland areas.Therefore,the seismic safety and adaptability of non-rock nuclear power plant(NPP)sites are the key concerns of nuclear safety researchers.Although the five site categories are clearly defined in the AP1000 design control documents,the effects of nuclear power five site conditions and soil nonlinearity on the seismic response characteristics of nuclear island buildings have not been systematically considered in previous related studies.In this study,targeting the AP1000 nuclear island structure as the research object,three-dimensional finite element models of a nuclear island structure at five types of sites(firm rock site(FR),soft rock site(SR),soft-to-medium soil site(SMS),upper bound soft-to-medium site(SMS-UB),and soft soil site(SS))are established.The partitioned analysis method of soil-structure interaction(PASSI)in the time-domain is used to investigate the effects of site hardness and nonlinearity on the acceleration,displacement,and acceleration response spectrum of the nuclear island structure under seismic excitation.The incremental equilibrium equation and explicit decoupling method are used to analyze the soil nonlinearity described by the Davidenkov model with simplified loading-reloading rules.The results show that,in the linear case,with the increase of site hardness,the peak ground acceleration(PGA)and the peak of acceleration response spectrum of the nuclear island structure increase except for the FR site,while the maximum displacement decreases.In nonlinear analysis,as the site hardness increases,the PGA,maximum displacement,and the peak of acceleration response spectrum of the nuclear island structure increase.The peak value of the acceleration response spectrum in the nonlinear case is greater than that in the linear case for FR,while smaller for SR and soil sites.The site nonlinearity reduces the peak values of the response spectrum for SR and soil sites much more as the site hardness decreases.The results of this study can provide a reference for design of nuclear island structures on soil and rock sites.
文摘Background: Patients expect nurses to be both technically competent and psychosocially skilled. Enhancing the quality of patient care and patient safety in healthcare settings has increased, resulting in limited opportunities for students to practice clinical skills in healthcare settings. Achieving competence in these skills is viewed as an essential task to be completed during the school curriculum. Objective: The purpose of this study was to evaluate the use of self-observation through cellular recordings as an adjunct to the clinical skills teaching of a blood sugar test to undergraduate nursing. Design: The research design consisted of pre- and post-test consecutive experimental design through a control group. Settings: This study targeted nursing students enrolled in baccalaureate programs running in Korea. Participant: The participants were 64 students including 34 for the experimental group and 30 for the control group. Methods: Those in the control group received standard teaching methods using lectures and skills classes and facilitated the use of self-study methods. Those in the experimental group received standard teaching using lectures and skills classes and facilitated use of cell phone recorded self-observation. The self-confidence of practicing a blood sugar test, satisfaction with the learning method, self-study participation, level of interest in nursing practice, and self-directed learning ability were measured using questionnaires. Results: Significant between-groups differences were detected in self-confidence of practicing a blood sugar test (t = 2.067, p = 0.043), satisfaction with the learning method (t = 2.818, p = 0.044), self-study participation (χ2 = 7.635, p = 0.022), and average self-directed learning ability (t = 3.202, p = 0.002). Conclusions: Self-observation through cellular phone recordings is an effective learning method as an adjunct to teach clinical skills.
文摘Cultural self-confidence is the full affirmation and active practice of a people,a country and a political party of its own cultural value,and the firm confidence in its cultural vitality.As an important hub and window for cultural exchanges between China and foreign countries,international Chinese education shoulders the important task of language and cultural propagation.In the mutual learning and exchanges between Chinese and foreign cultures,international Chinese education must insist on cultural self-confidence in teachers,teaching,teaching materials,etc.,"tell Chinese stories and spread Chinese voice",and show the world a rich,stereo,and vivid image of China.
文摘On different occasions, you will face challenge in speaking. Good speaking can leave a favorable impression on the others. Exactly, trying to be a experienced speaker is a key to one's successful life or career. But there are so many difficulties we would encounter in the process of speaking, thus how to develop a perfect speech is a sticking question for most of speakers. This article can help you to find ways to being a good speaker.
