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排序方式: 共有1016条查询结果,搜索用时 15 毫秒
1.
基于标准金融理论与行为金融理论相结合的思想,力图刻画投资者情绪的生成机理。以引起投资者情绪变化的货币环境、市场收益、市场波动、相关资产收益等因素为起点,引入市场投资价值、市场预期两个中间变量,建立了包含直接和间接影响两类路径的投资者情绪生成概念模型。使用中国股市2014年7月1日至2017年3月31日间的667组日度数据,在VAR建模的基础上开展实证研究。实证结果表明市场收益对投资者情绪具有直接的正向影响,市场波动和相关资产收益两因素基于市场预期中介变量间接负向作用于投资者情绪,而修正后引入的经济周期波动变量可以基于市场投资价值中介变量对投资者情绪产生正向影响,并进一步发现了市场收益、市场投资价值与投资者情绪之间存在正反馈强化过程。研究揭示出了投资者情绪生成的影响因素体系及其实现路径,将该领域研究深入到机理分析层面,并从一个侧面佐证了中国股市过度投机行为的存在。 相似文献
2.
龙文展 《重庆文理学院学报》2019,38(6):104-113
近代巴蜀诗人李士棻曾被曾国藩誉为“太白醉魂”,为曾府门下“四川三李”之一,其诗作有浓郁的巴蜀文化特色。然李氏仕宦不显,长期以来学界对其关注不足,学界近年不多的相关研究,多围绕国内所存的文献,对其诗歌创作进行艺术分析,对诗人的生平介绍多简单略过,没有严谨的考证,目前仍然很有争议。通过搜罗国内外现存典籍,综合目前所见李士棻本人著述,辅以晚清近代重要报刊《申报》和与李氏有交往的朝鲜文人文献,考证其生卒年及别号,冀为今后的相关研究解决基础问题。 相似文献
3.
Shawn Walker Mandie Scamell Pam Parker 《Women and birth : journal of the Australian College of Midwives》2018,31(3):e170-e177
Problem
Research suggests that the skill and experience of the attendant significantly affect the outcomes of vaginal breech births, yet practitioner experience levels are minimal within many contemporary maternity care systems.Background
Due to minimal experience and cultural resistance, few practitioners offer vaginal breech birth, and many practice guidelines and training programmes recommend delivery techniques requiring supine maternal position. Fewer practitioners have skills to support physiological breech birth, involving active maternal movement and choice of birthing position, including upright postures such as kneeling, standing, squatting, or on a birth stool. How professionals learn complex skills contrary to those taught in their local practice settings is unclear.Question
How do professionals develop competence and expertise in physiological breech birth?Methods
Nine midwives and five obstetricians with experience facilitating upright physiological breech births participated in semi-structured interviews. Data were analysed iteratively using constructivist grounded theory methods to develop an empirical theory of physiological breech skill acquisition.Results
Among the participants in this research, the deliberate acquisition of competence in physiological breech birth included stages of affinity with physiological birth, critical awareness, intention, identity and responsibility. Expert practitioners operating across local and national boundaries guided less experienced practitioners.Discussion
The results depict a specialist learning model which could be formalised in sympathetic training programmes, and evaluated. It may also be relevant to developing competence in other specialist/expert roles and innovative practices.Conclusion
Deliberate development of local communities of practice may support professionals to acquire elusive breech skills in a sustainable way. 相似文献4.
偏见是个体以不正确或不充分的信息为依据,并对其他人形成先入为主的负性判断,泛化至群体中则会表现为人们对某群体产生片面或错误的认知。文章从消极刻板印象、期望差异与归因偏差这三个角度解释了医患群体产生偏见的心理机制,在此基础上讨论偏见对医患关系造成的消极影响,并结合社会现实提出减少医患双方偏见的方法。 相似文献
5.
Laurent Gardes Stéphane Girard Gilles Stupfler 《Scandinavian Journal of Statistics》2020,47(3):922-949
The conditional tail expectation (CTE) is an indicator of tail behavior that takes into account both the frequency and magnitude of a tail event. However, the asymptotic normality of its empirical estimator requires that the underlying distribution possess a finite variance; this can be a strong restriction in actuarial and financial applications. A valuable alternative is the median shortfall (MS), although it only gives information about the frequency of a tail event. We construct a class of tail Lp-medians encompassing the MS and CTE. For p in (1,2), a tail Lp-median depends on both the frequency and magnitude of tail events, and its empirical estimator is, within the range of the data, asymptotically normal under a condition weaker than a finite variance. We extrapolate this estimator and another technique to extreme levels using the heavy-tailed framework. The estimators are showcased on a simulation study and on real fire insurance data. 相似文献
6.
Heidi Preis Michal Eisner Rony Chen Yael Benyamini 《Women and birth : journal of the Australian College of Midwives》2019,32(1):e110-e117
Problem
Birth preferences, such as mode and place of birth and other birth options, have important individual and societal implications, yet few studies have investigated the mechanism which predicts a wide range of childbirth options simultaneously.Background
Basic beliefs about birth as a natural and as a medical process are both predictive factors for childbirth preferences. Studies investigating birth beliefs, preferences, and actual birth are rare.Aim
To test a predictive model of how these beliefs translate into birth preferences and into actual birth related-options.Methods
Longitudinal observational study including 342 first-time expectant mothers recruited at women’s health centres and natural birth communities in Israel. All women filled out questionnaires including basic birth beliefs and preferred birth options. Two months postpartum, they filled out a questionnaire including detailed questions regarding actual birth.Findings
Stronger beliefs about birth being natural were related to preferring a more natural place and mode of birth and preferring more natural birth-related options. Stronger beliefs about birth being medical were associated with opposite options. The preferences mediated the association between the birth beliefs and actual birth. The beliefs predicted the preferences better than they predicted actual birth.Discussion
Birth beliefs are pivotal in the decision-making process regarding preferred and actual birth options. In a medicalized obstetric system, where natural birth is something women need to actively seek out and insist on, the predictive powers of beliefs and of preferences decrease.Conclusion
Women’s beliefs should be recognized and birth preferences respected. 相似文献7.
Marvesh M. Mendhi Kathleen B. Cartmell Susan D. Newman Shahirose Premji Charlene Pope 《Women and birth : journal of the Australian College of Midwives》2019,32(1):16-27
Background
Annually, up to 2.7 million neonatal deaths occur worldwide, and 25% of these deaths are caused by birth asphyxia. Infants born in rural areas of low-and-middle-income countries are often delivered by traditional birth attendants and have a greater risk of birth asphyxia-related mortality.Aim
This review will evaluate the effectiveness of neonatal resuscitation educational interventions in improving traditional birth attendants’ knowledge, perceived self-efficacy, and infant mortality outcomes in low-and-middle-income countries.Methods
An integrative review was conducted to identify studies pertaining to neonatal resuscitation training of traditional birth attendants and midwives for home-based births in low-and-middle-income countries. Ten studies met inclusion criteria.Findings
Most interventions were based on the American Association of Pediatrics Neonatal Resuscitation Program, World Health Organization Safe Motherhood Guidelines and American College of Nurse-Midwives Life Saving Skills protocols. Three studies exclusively for traditional birth attendants reported decreases in neonatal mortality rates ranging from 22% to 65%. These studies utilized pictorial and oral forms of teaching, consistent in addressing the social cognitive theory. Studies employing skill demonstration, role-play, and pictorial charts showed increased pre- to post-knowledge scores and high self-efficacy scores. In two studies, a team approach, where traditional birth attendants were assisted, was reported to decrease neonatal mortality rate from 49–43/1000 births to 10.5–3.7/1000 births.Conclusion
Culturally appropriate methods, such as role-play, demonstration, and pictorial charts, can contribute to increased knowledge and self-efficacy related to neonatal resuscitation. A team approach to training traditional birth attendants, assisted by village health workers during home-based childbirths may reduce neonatal mortality rates. 相似文献8.
Øystein Kravdal 《Population studies》2018,72(2):139-156
There is still considerable uncertainty about how reproductive factors affect child mortality. This study, based on Demographic and Health Survey data from 28 countries in sub-Saharan Africa, shows that mortality is highest for firstborn children with very young mothers. Other children with young mothers, or of high birth order, also experience high mortality. Net of maternal age and birth order, a short preceding birth interval is associated with above average mortality. These patterns change, however, if time-invariant unobserved mother-level characteristics of importance for both mortality and fertility are controlled for in a multilevel–multiprocess model. Most importantly, there are smaller advantages associated with longer birth intervals and being older at first birth. The implications of alternative reproductive ‘strategies’ are discussed, taking into account that if the mother is older at birth, the child will also be born in a later calendar year, when mortality may be lower. 相似文献
9.
尧斯的“期待视野”一般被看作伽达默尔解释学的延续和发展,或者是接受美学内部的“宏观的接受”。我们从期待视野的实现历程入手将其置于现象学的视域中,文本的可被期待性是建立在文本以纸质文献的形式存在且表现为能指串的组合;读者在面向文本之前已经有了关于文学史的阅读经验,这种经验是前给予的;视野在推进的过程中不断被反驳或充盈,其自身具有极强的宽容性;当然,尧斯期待视野的最终目标并不仅仅止步于文学,他有形而上诉求,即接受效果具有伦理性。在现象学的观照下,期待视野会逐步明朗起来。 相似文献
10.
AimVaginal birth after caesarean (VBAC) is a relatively safe alternative to repeat caesarean birth in the proper context. This important decision to undergo an elective caesarean versus VBAC is ultimately a decision of the mother. The purpose of our study was to assess the quality of online information in relation to VBAC collected using the most common search engine: Google.MethodsThe 10 most common hit sites for the keywords “VBAC” and “Vaginal birth after caesarean” were evaluated using the search engine Google. The quality of websites was rated based on the Silberg scale for accountability, the modified Abbott's criteria for presentation and the SMOG index for readability. The content of each website was compared to the Society of Obstetricians and Gynecologists of Canada (SOGC) guidelines for VBAC.Findings13 out of 20 identified websites met the adequate criteria for accountability, with 85% of the websites indicating authorship. 11 websites were deemed aesthetically agreeable. The target audience, assessed by the readability score, was notably above the non-medical population with an average SMOG index score of 14.75. Only half of the websites contained recommendations, as detailed by the SOGC guidelines.ConclusionAlmost all sites target a higher academic level, making it beyond the comprehension of the general population. Woman friendly web-assessment tools should be provided to enable pregnant women to take an active role in their decision making. 相似文献