期刊文献+
共找到2,882篇文章
< 1 2 145 >
每页显示 20 50 100
Asymptotic distributions of non-central studentized statistics
1
作者 SHAO QiMan ZHANG RongMao 《Science China Mathematics》 SCIE 2009年第6期1262-1284,共23页
Let X 1, ..., X n be independent and identically distributed random variables and W n = W n (X 1, ..., X n ) be an estimator of parameter ?. Denote T n = (W n ? ? 0)/s n , where s n 2 is a variance estimator of W n . ... Let X 1, ..., X n be independent and identically distributed random variables and W n = W n (X 1, ..., X n ) be an estimator of parameter ?. Denote T n = (W n ? ? 0)/s n , where s n 2 is a variance estimator of W n . In this paper a general result on the limiting distributions of the non-central studentized statistic T n is given. Especially, when s n 2 is the jacknife estimate of variance, it is shown that the limit could be normal, a weighted χ 2 distribution, a stable distribution, or a mixture of normal and stable distribution. Applications to the power of the studentized U- and L- tests are also discussed. 展开更多
关键词 non-central studentized statistics studentized U-statistics studentized L-statistics limiting distributions power of tests 62E20 62F05 60F05
原文传递
Edgeworth expansion of the Studentized product-limit estimator for truncated and censored data
2
作者 孙六全 《Science China Mathematics》 SCIE 2000年第5期495-508,共14页
Based on random left truncated and right censored data we investigate the one-term Edgeworth expansion for the Studentized product-limit estimator, and show that the Edgeworth expansion is close to the exact distribut... Based on random left truncated and right censored data we investigate the one-term Edgeworth expansion for the Studentized product-limit estimator, and show that the Edgeworth expansion is close to the exact distribution of the Studentized product-limit estimator with a remainder of On(su-1/2). 展开更多
关键词 TRUNCATED and censored data studentized product-limit ESTIMATOR ASYMPTOTIC NORMALITY Edge- WORTH expansion.
原文传递
The Berry-Esseen bound for studentized U-statistics
3
作者 林正炎 《Science China Mathematics》 SCIE 2000年第11期1154-1163,共10页
We establish the Berry-Esseen bound O(n-δ#2) for a studentized U-statistic under the assumption of existence of the (2 + δ)-th moment.
关键词 studentized U-STATISTICS Berry-Esseen bound.
原文传递
Emotion regulation habits and emotional states of college students during lockdown:A cross-sectional survey
4
作者 Shu-Xin Zhao Tao Han +7 位作者 Wei-Zhi Bi Le-Le Fei Lu-Luan Han Yu-Lin Wang Zhi-Guang Ping Chong-Jian Wang Chang-Fu Hao Yong-Juan Xin 《World Journal of Psychiatry》 2026年第1期244-255,共12页
BACKGROUND The prevalence of negative emotional states,such as anxiety and depression,has increased annually.Although personal habits are known to influence emotional regulation,the precise mechanisms underlying this ... BACKGROUND The prevalence of negative emotional states,such as anxiety and depression,has increased annually.Although personal habits are known to influence emotional regulation,the precise mechanisms underlying this relationship remain unclear.AIM To investigate emotion regulation habits impact on students negative emotions during lockdown,using the coronavirus disease 2019 pandemic as a case example.METHODS During the coronavirus disease 2019 lockdown,an online cross-sectional survey was conducted at a Chinese university.Emotional states were assessed using the Depression,Anxiety,and Stress Scale-21(DASS-21),while demographic data and emotion regulation habits were collected concurrently.Data analysis was performed using SPSS version 27.0 and includedχ^(2)-tests for intergroup comparisons,Spearman’s rank-order correlation coefficient analysis to examine associations,and stepwise linear regression modeling to explore the relationships between emotion regulation habits and emotional states.Statistical significance was set atα=0.05.RESULTS Among the 494 valid questionnaires analyzed,the prevalence rates of negative emotional states were as follows:Depression(65.0%),anxiety(69.4%),and stress(50.8%).DASS-21 scores(mean±SD)demonstrated significant symptomatology:Total(48.77±34.88),depression(16.21±12.18),anxiety(14.90±11.91),and stress(17.64±12.07).Significant positive intercorrelations were observed among all DASS-21 subscales(P<0.01).Regression analysis identified key predictors of negative emotions(P<0.05):Risk factors included late-night frequency and academic pressure,while protective factors were the frequency of parental contact and the number of same-gender friends.Additionally,compensatory spending and binge eating positively predicted all negative emotion scores(β>0,P<0.01),whereas appropriate recreational activities negatively predicted these scores(β<0,P<0.01).CONCLUSION High negative emotion prevalence occurred among confined students.Recreational activities were protective,while compensatory spending and binge eating were risk factors,necessitating guided emotion regulation. 展开更多
关键词 Emotional states Emotion regulation habits College students Coronavirus disease 2019 Lockdown PREVALENCE
暂未订购
An Empirical Study of the Impact of AI-Based Reflective Dialogue Model on EFL Students’Oral Expression Skills 被引量:1
5
作者 Yu Zhao You-You Zhang +2 位作者 Xiao-Nan Luo Dan-Ting Deng Qun-Fang Zeng 《教育技术与创新》 2025年第3期9-20,共12页
Oral expression skills play an essential role in the development of EFL students’language abilities,and how to improve EFL students’oral expression skills is an essential and challenging task.This study adopts a qua... Oral expression skills play an essential role in the development of EFL students’language abilities,and how to improve EFL students’oral expression skills is an essential and challenging task.This study adopts a quasi-experimental research method to carry out the research and proposes an AI-based reflective dialogue model.Based on this,an analysis of the impact brought by this model on EFL students’oral expression performance and learning anxiety levels.The results show that students in the experimental group have significantly higher oral expression performance than those in the control group in the three dimensions of grammatical accuracy,expressive fluency,and word accuracy.In addition,the students in the experimental group produced facilitated anxiety after using the AI-based reflective dialogue model for oral expression learning,which prompted the students to learn more diligently. 展开更多
关键词 human-computer dialogue model oral expression reflective dialogue AI EFL student
在线阅读 下载PDF
Challenges and Innovations in Ideological and Political Education for College Students in the Micro-Public Opinion Environment 被引量:1
6
作者 Haoyue Zhang Shumin Yan 《Journal of Contemporary Educational Research》 2025年第9期218-224,共7页
The micro-public opinion environment,characterized by information fragmentation,instantaneous dissemination,emotional contagion,and diverse values,has profoundly transformed the information acquisition patterns and co... The micro-public opinion environment,characterized by information fragmentation,instantaneous dissemination,emotional contagion,and diverse values,has profoundly transformed the information acquisition patterns and cognitive formation processes of college students.It also poses new challenges and opportunities for innovation in ideological and political education(hereinafter referred to as“IPE”)for college students.Starting from the contemporary value of IPE for college students,this paper analyzes the logical connection between the micro-public opinion environment and IPE,thoroughly examines the core challenges faced by IPE in this context,and proposes specific innovative paths from four perspectives:content,methods,subjects,and mechanisms.The aim is to provide insights for enhancing the pertinence and effectiveness of IPE for college students in the micro-public opinion environment. 展开更多
关键词 Micro-public opinion environment College students Ideological and political education Educational innovation
在线阅读 下载PDF
Posttraumatic stress symptoms among Chinese university students during the COVID-19 pandemic:Prevalence,correlates,and mental health help-seeking
7
作者 Rui-Yao Wu Lin-Feng Ge Bao-Liang Zhong 《World Journal of Psychiatry》 SCIE 2025年第1期145-152,共8页
BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking beh... BACKGROUND Revisiting the epidemiology of posttraumatic stress symptoms(PTSSs)among university students during the coronavirus disease 2019(COVID-19)pandemic as well as understanding the mental health help-seeking behavior of individuals with PTSSs has critical implications for public mental health strategies in future medical pandemics.AIM To investigate the prevalence and correlates of PTSSs among university students during the first wave of the COVID-19 pandemic in China and to examine mental health help-seeking behaviors among these students.METHODS A total of 2507 Chinese university students were recruited via snowball sampling.The students completed the Seven-item Screening Scale for Post-traumatic Stress Disorder during the first wave of the COVID-19 pandemic in China.Sociodemo-graphic characteristics,pandemic-related characteristics,and mental health help-seeking behaviors of students with PTSSs were also collected.RESULTS The prevalence of PTSSs among the participants was 28.0%.Seven significant correlates of PTSSs were identified(odds ratio=1.23-3.65,P≤0.024):Female sex,being 19 years old or older,living with others or alone,a low level of family economic status,fair or poor interpersonal relationships,severe or very severe local pandemic,and having family members diagnosed with COVID-19.However,only 3.28%of the students with PTSSs reported seeking help from mental health specialists.Among the 23 students who sought help from mental health specialists,13 opted for online or telephone-based psychological consultation.CONCLUSION Our data suggest that there was a high risk of PTSSs among university students and a high level of unmet mental health needs during the COVID-19 pandemic.The delivery of mental health services online or via telephone is a promising approach to address these unmet needs. 展开更多
关键词 Posttraumatic stress symptoms University students COVID-19 Mental health help-seeking China
暂未订购
物理信息Student’s t混合模型在混油长度预测中的应用
8
作者 贾子寒 《油气储运》 北大核心 2025年第10期1200-1200,共1页
多油品管道在石油炼制产品的运输中具有可靠、经济等优势,然而在顺序输送过程中,不同油品在接触界面处会发生混合,形成混油段。若混油长度控制不当,将导致油品污染、质量下降,甚至造成巨大的经济损失。因此,精确预测混油长度对于优化切... 多油品管道在石油炼制产品的运输中具有可靠、经济等优势,然而在顺序输送过程中,不同油品在接触界面处会发生混合,形成混油段。若混油长度控制不当,将导致油品污染、质量下降,甚至造成巨大的经济损失。因此,精确预测混油长度对于优化切割操作、保障油品质量、提高管道运行效率具有重要意义。 展开更多
关键词 多油品管道 Students t混合模型 混油长度
原文传递
Think Like an Engineer!
9
作者 James A.Brown 《The Canadian Journal of Urology》 2025年第4期237-237,共1页
I had an epiphany last month.I realized that all the teaching I’ve provided to residents and students the past three decades could be distilled into a single,germane suggestion:“Think Like an Engineer!”
关键词 EPIPHANY residents students STUDENTS TEACHING RESIDENTS engineering
暂未订购
Perceptions of pre-university students in Malaysia on geoscience discipline
10
作者 Dony Adryansyah Nazaruddin Nurul Syahida Abu Bakar Nur Hidayah Md Noh 《Episodes》 2025年第4期421-432,共12页
As Malaysia seeks to enhance its educational development,understanding student attitudes toward various scientific disciplines—particularly STEM fields—becomes crucial.This study investigates the perceptions of pre-... As Malaysia seeks to enhance its educational development,understanding student attitudes toward various scientific disciplines—particularly STEM fields—becomes crucial.This study investigates the perceptions of pre-university students in Malaysia regarding the geoscience discipline.Data were collected through a questionnaire designed to explore students’experiences with geoscience-related subjects and their perceptions of this essential field,focusing on their understanding and interest in geoscience. 展开更多
关键词 MALAYSIA pre university students enhance its educational developmentunderstanding student attitudes geoscience discipline student attitudes educational development STEM fields
在线阅读 下载PDF
Encouraging Environmental Sensitivity and Earth Science Performance:Perceptions from First-Year Teacher Education Students
11
作者 Aldrex A.Barrientos 《Journal of Environmental & Earth Sciences》 2025年第4期180-192,共13页
This study explores the environmental sensitivity of first-year teacher education stu dents,focusing on the relationship between their Earth Science performance,demographic factors,and their cognitive and emotional re... This study explores the environmental sensitivity of first-year teacher education stu dents,focusing on the relationship between their Earth Science performance,demographic factors,and their cognitive and emotional responses to environmental challenges.Using a descriptive correlational design within a mixed-methods framework,the research incorporates tools such as the Environmental Sensitivity Test(EST),focus group discussions(FGDs),and eco-mapping to comprehensively collect and analyze data.The findings reveal that while students exhibit a general awareness of environmental issues,this awareness does not consistently translate into sustainable practices,particularly in areas such as water conservation and waste management.A weak and statistically insignificant correlation was identified between Earth Science performance and environmental sensitivity,indicating that academic achievement in the subject does not necessarily lead to environmentally responsible behaviors.The results underscore the importance of teacher education programs integrating principles of behavioral psychology,experiential learning,and focused environmental education.Specifically,secondary science teachers should be equipped with practical strategies,such as implementing project-based learning,organizing community-centered environmental initiatives,and fostering interdisciplinary approaches to sustainability.These interventions address the gap in preparing future educators to effectively advocate for and implement sustainable practices.Strengthening teacher preparation programs with these components ensures that science educators are better equipped to cultivate a new generation of environmentally responsible citizens. 展开更多
关键词 Environmental Sensitivity Earth Science PERFORMANCE PERCEPTION First-Year Students Teacher Education Students
在线阅读 下载PDF
Returning the Lost Wallet
12
作者 李文平 《中学生英语》 2025年第26期6-6,共1页
Last Monday,on my way to school,I found a wallet on the ground.I picked up it①and opened it.There was some money,a student ID card and a few photos in it.I thought the owner must be very worried.
关键词 PHOTOS student ID card student id card lost wallet MONEY
在线阅读 下载PDF
Application of Modified Peyton’s Four-Step Teaching Method in Bridge Experimental Courses for Undergraduate Medical Students
13
作者 Hongmei Xu Xuejing Wang 《Journal of Contemporary Educational Research》 2025年第8期105-110,共6页
Objective:To explore the application value of the modified Peyton’s four-step teaching method in bridge experimental courses for undergraduate medical students.Methods:100 undergraduate medical students from Bethune ... Objective:To explore the application value of the modified Peyton’s four-step teaching method in bridge experimental courses for undergraduate medical students.Methods:100 undergraduate medical students from Bethune Hospital of Shanxi from July 2023 to July 2024 were selected and grouped using a random number method.The control group received a conventional training program,while the observation group received a modified Peyton’s four-step teaching and training program.The DOPS scores and teaching satisfaction scores of the two groups of undergraduate medical students were compared.Results:After intervention,the scores of each dimension of the DOPS for the undergraduate medical students in the observation group were higher than those in the control group.The teaching satisfaction scores of the undergraduate medical students after teaching were lower in the control group than in the observation group.The differences between the two groups were statistically significant(P<0.05).Conclusion:The modified Peyton’s four-step teaching program developed in this study can promote teaching and learning methods for undergraduate medical students,improve teaching satisfaction levels,and help administrators stabilize the medical team. 展开更多
关键词 Undergraduate medical students SATISFACTION UNDERGRADUATE Medical students
在线阅读 下载PDF
Six Elements That Help Create a Friendly Environment and Motivate Learning
14
作者 Roberto Cuccu 《Sino-US English Teaching》 2025年第1期1-6,共6页
The following sections of this article are the background of the experiences described in the book Creative Journals in a Bottle.Out-of-the-Box Activities That Help Teenagers Become Sensitive and Self-Confident Adults... The following sections of this article are the background of the experiences described in the book Creative Journals in a Bottle.Out-of-the-Box Activities That Help Teenagers Become Sensitive and Self-Confident Adults(Cuccu,2024).Being a teacher in a classroom of young people involves more than just being able to tell them about a topic they have to study,they are also educators and play an important role in their development in a critical period of their lives.The following sections deal with things to do and not to do in order to create an ideal environment characterized by empathy,motivation,and learning together. 展开更多
关键词 Neuro-Linguistic Programming different views of a situation Cooperative Learning dealing with students learning styles students’interests role of empathy
在线阅读 下载PDF
Exploration and Practice of Innovative Talent Cultivation Models for Master's Degree Students in Ethnic Medicine:A Case Study of Guangxi University of Chinese Medicine
15
作者 Haicheng WEN Ting LIU +2 位作者 Chen LIN Wei WEI Hao CHENG 《Asian Agricultural Research》 2025年第10期45-49,共5页
The cultivation of innovative talents has become the primary objective of talent development in colleges and universities and is also essential for the personal development of master's degree students.Ethnic medic... The cultivation of innovative talents has become the primary objective of talent development in colleges and universities and is also essential for the personal development of master's degree students.Ethnic medicine,a key discipline at Guangxi University of Chinese Medicine,aims to cultivate high-level master's degree talents who possess comprehensive qualities,strong innovative capabilities,and distinctive characteristics of Zhuang medicine.This program is designed to better serve the local economic development and social needs of Guangxi,thereby promoting the substantive advancement of higher education within traditional medical institutions. 展开更多
关键词 ETHNIC MEDICINE Innovative TALENT Master's DEGREE student Ability cultivation
在线阅读 下载PDF
Teacher-student relationship quality effects on school students’bullying victimization:A serial mediation model by student-student relationship and student engagement
16
作者 Yuan Yuan Yanfei Yang 《Journal of Psychology in Africa》 2025年第4期541-548,共8页
This study examined the impact of teacher-student relationship quality on students’risk of bullying victimiza-tion and the mediating roles of student-student relationships and student engagement in this relationship.... This study examined the impact of teacher-student relationship quality on students’risk of bullying victimiza-tion and the mediating roles of student-student relationships and student engagement in this relationship.A total of 656 Chinese junior high school students(females=361,mean age=13.75,SD=0.98)completed validated measures of teacher-student relationship quality,student-student relationship quality,student engagement,and bullying victimization.Regression analysis results indicated that higher teacher-student relationship quality predicted a lower risk of student bullying victimization.Serial mediating effect testing of the student-student relationship quality and student engagement revealed that these factors fully mediated the relationship between teacher-student relationship quality and bullying victimization,resulting in a lower risk of bullying victimization.The results showed that student-student relationship quality had a more substantial mediating effect than student engagement.Thefindings support the Socio-Ecological Framework,suggesting that within the Microsystem,interactions between individuals and their immediate environments significantly impact their behavior.Specifically,thesefindings suggest that good teacher-student relationships can enhance the quality of student-student relationships and student engagement,thereby preventing and reducing the occurrence of bullying victimization. 展开更多
关键词 teacher-student relationship quality bullying victimization student-student relationship quality student engagement junior middle school students
在线阅读 下载PDF
Welcome to Changsha
17
作者 邱诗怡 李兰(指导) 《疯狂英语(双语世界)》 2025年第1期72-74,共3页
Hello,my name is Jesse.I am a student in Class 3,Grade 6,Xiqiao Experimental Primary School.My hometown is in Changsha,Hunan.I love this land.Do you want to learn about this interesting place?Let me be a little guide ... Hello,my name is Jesse.I am a student in Class 3,Grade 6,Xiqiao Experimental Primary School.My hometown is in Changsha,Hunan.I love this land.Do you want to learn about this interesting place?Let me be a little guide of my hometown,and I’ll tell you. 展开更多
关键词 HOMETOWN GUIDE HUNAN Changsha STUDENT
在线阅读 下载PDF
My School Day
18
作者 张莫离(文/图) 邵梓凝(指导) 《疯狂英语(双语世界)》 2025年第4期50-53,共4页
Hello,everyone.My English name is Molly.I am a girl.I am 7 years old.I'm a primary school student.I'm in Class 4,Grade 2 at Beijing Jianhua ExperimentalSchooll.
关键词 SCHOOL class GRADE primary school STUDENT
在线阅读 下载PDF
解应用题
19
作者 黄炜乐 《疯狂英语(双语世界)》 2025年第1期41-43,66,共4页
(1)A class has 36 students.There are 10 more boys than girls.How many girls are there?一个班有36人。男生比女生多10人。女生有多少人?
关键词 STUDENTS BOYS GIRLS CLASS
在线阅读 下载PDF
What do nursing students know about delirium?A cross-sectional study and scenario analysis
20
作者 Rana A.Al-Awamleh Ibrahim Ayasreh +5 位作者 Omar Khraisat Jafar M.Alkhawaldeh Haitham Khatatbeh Nisser Alhroub Manar Abu-abbas Ahmad Salameh Al-Awamleh 《Frontiers of Nursing》 2025年第3期401-407,共7页
Objective:To assess the level of nursing students’knowledge about delirium and its associated risk factors.Delirium is a clinical syndrome characterized by alterations in cognition and psychomotor activity.Since deli... Objective:To assess the level of nursing students’knowledge about delirium and its associated risk factors.Delirium is a clinical syndrome characterized by alterations in cognition and psychomotor activity.Since delirium is common among geriatric patients,adequate preparedness of nursing students to assess and manage delirious geriatric patients is necessary to improve potential nurses’quality of care and communication with this group.Limited research work was conducted to address nursing students’knowledge about delirium.Methods:This cross-sectional descriptive study was conducted from October 2022 to February 2023.A convenience sampling was used,and 319 valid questionnaires were obtained from nursing students from six Jordanian governmental and private universities,who were at least in their third academic year.An adopted delirium knowledge scale was used to collect data.Descriptive statistics and an independent t-test were used for data analysis.Results:The mean for general knowledge about delirium was 57.5%.The mean for knowledge of delirium risk factors was 61.8%.Nursing students in their fourth academic year scored significantly higher on both general knowledge and risk knowledge scales than students in the third academic year.Conclusions:Nursing students’knowledge regarding delirium and its risk factors was low.Educational efforts should be maximized for incorporating and addressing the topic of delirium in the undergraduate nursing curriculum.Implications of this study include revising nursing curricula to ensure that students receive enough education on delirium,including its detection,diagnosis,and management.The implications also include giving nursing students the chance to gain experience in caring for delirious patients and providing them with the tools and resources they need to assess and manage delirium. 展开更多
关键词 DELIRIUM JORDAN KNOWLEDGE nursing students risk factors
在线阅读 下载PDF
上一页 1 2 145 下一页 到第
使用帮助 返回顶部