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Estimated prevalence and sociodemographic correlates of mental disorders in medical students of Hebei Province,China:A crosssectional study
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作者 Wen-Ting Lu Pei-Hua Hu +22 位作者 Na Li Lan Wang Ran Wang Zeng Wang Mei Song Tian-Yu Zhao shi-Jie Guo Fan-Fan Huang Bu-Fan Liu Ruo-Jia Ren Li Yang Quan Lin Yue-Hang Xu Na Jin Huan Chen Yuan-Yuan Gao Zhi-Feng Wu guang-yu shi Da-Peng Liu Zhong-Qi Pan Chun-Chao Du Cui-Xia An Xue-Yi Wang 《World Journal of Psychiatry》 SCIE 2023年第5期215-225,共11页
BACKGROUND In China,the identification rate and treatment rate of mental disorders are low,and there are few surveys on the prevalence of mental disorders among college students using diagnostic tools such as Mini-Int... BACKGROUND In China,the identification rate and treatment rate of mental disorders are low,and there are few surveys on the prevalence of mental disorders among college students using diagnostic tools such as Mini-International Neuropsychiatric Interview(MINI),so the prevalence and treatment of mental disorders among college students are unclear.AIM To estimate prevalence of mental disorders among medical students in Hebei Province,and provide guidance for improving their mental health.METHODS This was a cross-sectional study based on an Internet-based survey.Three levels of medical students in Hebei Province were randomly selected(by cluster sampling)for screening.Using the information network assessment system,the subjects scanned the 2D code with their mobile phones,clicked to sign the informed consent,and answered a scale.A self-designed general status questionnaire was used to collect information about age,gender,ethnicity,grade,and origin of students.The MINI 5.0.was used to investigate mental disorders.Data analysis was performed with SPSS software.Statistically significant findings were determined using a two-tailed P value of 0.05.RESULTS A total of 7117 subjects completed the survey between October 11 and November 7,2021.The estimated prevalence of any mental disorders within 12 mo was 7.4%.Mood disorders were the most common category(4.3%),followed by anxiety disorders(3.9%);15.0%had been to psychological counseling,while only 5.7%had been to a psychiatric consultation,and only 10%had received drug therapy in the past 12 mo.CONCLUSION Although the estimated prevalence of mental disorders in medical students is lower than in the general population,the rate of adequate treatment is low.We determined that improving the mental health of medical students is an urgent matter. 展开更多
关键词 Hebei sectional COLLEGE
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高分子在氧化铝纳米孔道中受限结晶的研究进展 被引量:3
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作者 刘国明 施光宇 王笃金 《高分子学报》 SCIE CAS CSCD 北大核心 2020年第5期501-516,共16页
高分子材料在微纳米尺度常常表现出不同于本体的物理性质.对结晶性高分子来说,在纳米受限空间的成核机理、结晶结构和动力学特征都与本体材料有所不同.本文总结了近年来基于多孔氧化铝纳米模板(AAO)开展的高分子受限结晶的研究进展,重... 高分子材料在微纳米尺度常常表现出不同于本体的物理性质.对结晶性高分子来说,在纳米受限空间的成核机理、结晶结构和动力学特征都与本体材料有所不同.本文总结了近年来基于多孔氧化铝纳米模板(AAO)开展的高分子受限结晶的研究进展,重点介绍了本课题组的工作.研究发现,在AAO模板中,高分子结晶的过冷度大大增加,成核机理从本体的异相成核转变为均相成核或表面成核;高分子结晶结构通常表现为各向异性,动力学因素、热力学因素和界面性质均对取向结构有重要影响;受限情况下高分子结晶速率大大降低,表现出"成核控制"的动力学特征;空间受限使高分子结晶度降低,倾向于形成亚稳态晶型.最后,对该领域尚待解决的问题进行了展望. 展开更多
关键词 高分子结晶 成核 取向 结晶动力学 纳米受限
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受限在一维纳米孔道内的高分子结晶取向模型 被引量:3
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作者 苏萃 施光宇 +1 位作者 王笃金 刘国明 《高分子学报》 SCIE CAS CSCD 北大核心 2019年第3期281-290,M0005,共11页
利用X射线极图法研究了等规聚丙烯(i PP)在阳极氧化铝模板(AAO)中的取向结构.实验结果表明,i PP在AAO内主要的取向模式为倒易空间的b*轴或a*轴平行于AAO的孔轴(~).这2种取向模式的比例同结晶条件有关:随着降温速率增加,高分子的整体取... 利用X射线极图法研究了等规聚丙烯(i PP)在阳极氧化铝模板(AAO)中的取向结构.实验结果表明,i PP在AAO内主要的取向模式为倒易空间的b*轴或a*轴平行于AAO的孔轴(~).这2种取向模式的比例同结晶条件有关:随着降温速率增加,高分子的整体取向逐渐变弱,但是a*║~的取向变化更明显.在液氮淬冷的条件下,i PP几乎不能结晶.实验结果同文献所报道的"动力学选择机理"不一致.借助简化的"一维格子"模型,模拟了成核速率、生长速率对整体取向的影响.结果表明,高分子在受限空间中的取向存在3个区域:成核速率极高而生长速率极低时,晶体生长尺寸很小,样品表现为各向同性;中间区域各晶面的相对生长速率决定了最终取向结构;成核速率极低而生长速率极高时,纳米孔中高分子一旦成核,晶体就会很快生长至充满整个孔道,所有(hk0)晶面均可生长.综合实验和模拟结果,提出了高分子受限在一维纳米孔道中的晶体取向模型. 展开更多
关键词 高分子结晶 受限 取向 阳极氧化铝模板 等规聚丙烯
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