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Variable selection for single-index models based on martingale difference divergence
Yuan Xiaohui,Wang Yue,Wang Yiming,Liu Tianqing 한국통계학회 2024 Journal of the Korean Statistical Society Vol.53 No.1
In this paper, we consider variable selection for single-index models via martin- gale difference divergence. The important covariates are selected by maximizing penalized martingale difference divergence objective functions with fixed tuning parameters. To choose tuning parameters, we propose to use a BIC criterion. The consistency of the variable selection procedure with LASSO, SCAD and ALASSO penalties and asymptotic properties of the resulting estimators are established. The performance of the proposed procedure is assessed through extensive simulation studies. Finally, we apply the proposed method to real data sets.
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周伟 ( Zhou-wei ),袁一鸣 ( Yuan-yiming ) 경상대학교 교육연구원(구 경상대학교 중등교육연구소) 2020 중등교육연구 Vol.32 No.2
近年来在中国高校校园中校园法律风险事故频发,引起了社会的高度关注。校园事故发生的形式和诱发因素甚多。校园事故大体可以分为校园欺凌、师生冲突、学校与家长的冲突(家校冲突)、校园套路贷款等。在众多事故中大致可以分为三类角色,一是事故的当事人,即高校学生;二是学生家长;三是作为学生校园行为监管者的学校。我们需对校园风险事故发生的成因进行细致分析,明确事故中各类角色应当责任承担和应尽的义务。以此提出可行的对策, 制定高校校园法律风险的防范对策最根本也是最重要的,加强学生身心健康教育,让学生对校园欺凌、对损害自己合法权益的行为大声说不,尽可能降低此类事故发生概率,防范校园风险事故的再次发生。此外在发生高校校园法律风险事故后,如何明确各法律主体责任也成为必须明确的重要问题。 In recent years, campus legal risk accidents occur frequently in the campus of colleges and universities in China, which has aroused great concern of the society. There are many forms and inducing factors of campus accidents. Campus accidents can be divided into campus bullying, conflicts between teachers and students, conflicts between schools and parents (home school conflicts), campus routine loans, etc. There are three kinds of roles in many accidents, one is the Party of the accident, that is, college students; the second is the parents of students; the third is the school as the supervisor of students' campus behavior. We need to make a detailed analysis of the causes of campus risk accidents, and clarify the responsibilities and obligations of various roles in the accidents. In order to put forward feasible countermeasures, the most fundamental and most important is to strengthen students' physical and mental health education, let students say no to campus bullying and damaging their legitimate rights and interests, reduce the probability of such accidents as far as possible, and prevent the recurrence of campus risk accidents. In addition, after the occurrence of campus legal risk accidents, how to clarify the legal subject responsibility has become an important issue.
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Chung Eric,Jiann Bang-Ping,Nagao Koichi,Hakim Lukman,Huang William,Lee Joe,Lin Haocheng,Mai Dung Ba Tien,Nguyen Quang,박현준,Sato Yoshikazu,Tantiwongse Kavirach,Yuan Yiming,Park Kwangsung 대한남성과학회 2021 The World Journal of Men's Health Vol.39 No.4
Purpose: COVID pandemic significantly affected the delivery and maintenance of healthcare system, resulting in greater utilization of digital health interventions. Materials and Methods: This multi-national cross-sectional survey was administered to clinicians working in major Asia-Pacific cities during the mandatory social lockdown period in June 2020. Clinical demographics and professional data, delivery of Andrology-related healthcare services, and patient distress based on validated questionnaires such as Depression and Anxiety Stress Scales (DASS) and Decisional Engagement Scale (DES) were collected. Results: Telehealth medicine was instituted in all the centres with the majority of centres (92.9%) reported a 50% or more reduction in out-patient related services. The numbers of phone calls, emails correspondence and educational webinars have significantly increased. Despite the provision of reasons for changes in healthcare service and delay in surgery, more than half of the patients (57.1%) rated 2 on the DASS score for the item on patients over-react to situations, while a third of the patients (35.7%) scored a 2 for DASS item on patients being more demanding or unreasonable. The DES scores were more positive with most patients reported a score above 7 out of 10 in terms of items on accepting current arrangement (85.7%), confident in clinician decision-making about treatment (92.9%) and comfortable that the decision is consistent with their preferences (71.4%). Most patients (85.7%) indicated their preferences for more detailed information on healthcare provision. Conclusions: Our study showed telehealth services were integrated early and successfully during the COVID pandemic and patients were generally receptive with minimal psychosocial distress.
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