融合深度学习的无人驾驶多目标检测算法

目标检测是目前计算机视觉领域非常热门的研究方向,是无人驾驶技术重要环节。为提高行车过程中目标检测精度并改善基于单发多目标检测器在训练时出现的正负样本失衡问题,基于车载视频,运用深度学习算法中具有强大性能的SSD模型,通过引入Focal Loss函数设计新的损失函数,解决样本失衡问题;同时在不降低检测速率的情况下,提高检测精度。基于自行采集的车载视频数据集进行实验,结果表明,改进后SSD模型的mAP相较于原始SSD模型提高了3%,达到74%。     

关于饭店员工流失问题的探讨

饭店员工频繁流动是一个普遍存在的现象，而导致员工流失的原因是多方面的。从饭店管理角度来看，人员流动过频，尤其是优秀员工的流失显然对饭店的经营管理带来不利的影响，甚至会危及企业的生存与发展，为此必须采取一些有效措施来稳定员工队伍。     

高校青年体育教师流动问题的社会学研究

综合运用文献资料、调查访问、逻辑分析等研究方法,对高校青年体育教师的流失问题进行社会学分析。结果表明：青年教师的流动在高校中普遍存在,流失的虽是少部分,但隐形流失是存在的不可忽视的问题。流动的对象、方向不合理,后果严重。思想不稳定及缺乏敬业精神等是流失的主观原因,工资待遇低、不被重视、环境艰苦等是流失的客观原因,并对青年体育教师的稳定提出建议与对策。     

Teaching Prospect Theory with the Deal or No Deal Game Show

Recent evidence indicates that decision makers are more sensitive to potential losses than gains. Loss aversion psychology has led behavioural economists to look beyond expected utility by developing prospect theory. We demonstrate this theory using the Deal or No Deal game show.     

Emotion Work Revealed by Job Loss Discourse: Backgrounding-Foregrounding of Feelings, Construction of Normalcy, and (Re)instituting of Traditional Masculinities

Three emotion work themes were displayed in the discourse of individuals who lost their jobs and of their family members. Foregrounding-backgrounding of emotions indicated not only how some individuals and family members exerted effort to express positive emotions, but also why they would do so (for deep authenticity). In the construction of normalcy, respondents made an effort to portray and enact their lives as similar to the way things were before the job loss. By (re)instituting traditional masculinities, the men who lost their jobs were able to be "real" men in an emasculating situation. Taken together, these findings offer possibilities for further theoretical development and for communication interventions that can be applied by human resource professionals, career and outplacement counselors, family members, friends, and the individuals themselves.     

肝功能对意识消失时咪达唑仑血浆浓度和脑电双频谱指数的影响(英文)

研究目的:探索不同肝功能指数对镇静药咪达唑仑的敏感性以及脑电双频谱指数(BIS)的预测意识消失的影响。创新要点:明确不同肝功能状态的患者对中枢抑制药的敏感性以及BIS预测意识消失概率发生的敏感性。指导临床医生根据患者的肝功能状态合理使用中枢抑制药以及正确利用BIS预测镇定深度。研究方法:选择意识消失作为研究终点,以50%患者意识消失时的咪唑安定的浓度以及BIS值作为观察指标。重要结论:终末期肝病患者对中枢镇静药咪唑安定更敏感,该类患者在BIS预测意识消失概率发生的敏感性存在差异。     

《沧浪之水》中池大为丢失话语权之剖析

20世纪90年代，在市场经济对传统文人操守冲击等因素的影响下，有些知识分子丢失了象征着自己身份的话语权。文章以知识分子池大为为个案，剖析了他丢失话语权的原因，进而表达了对知识分子话语权重构的期待。     

Measuring children’s perceived cost of school science: Instrument development and psychometric evaluation

This investigation addresses the need for valid and reliable instruments that contribute to understanding the factors that lead to the rejection of science-related studies. We discuss the theoretical and methodological limitations of published attitudes toward science questionnaires and describe the development and validation of a short instrument rooted in the cost construct of the expectancy-value model of achievement motivation. We collected data from a sample of six hundred thirty-two 5^th and 6^th (M_age = 10.87; SD = .76) elementary students in Spain. Exploratory and confirmatory factor analysis revealed a parsimonious structure measuring loss of valued alternatives and task effort ​cost. Further psychometric evaluation displayed evidence for convergent, discriminant, and concurrent validity. Likewise, the reliability was acceptable for both three-item scales. These findings support the proposed instrument to measure barriers experienced by Spanish children when studying school science.     

从粘虫为害损失谈防治指标

本文综合各地研究粘虫防治指标的资料,提出麦田粘虫的防治指标应放宽到20头/m~2     

道德法律化:当前道德建设的重要途径

随着社会主义市场经济的不断发展，我国道德状况出现了紊乱和“滑坡”的现象。这在很大程度上是由于道德规范的软约束机制造成的，因此，应从道德与法律的内在规律出发，结合道德法律化的历史和现实的实践经验，强化道德软约束，加强道德法律化建设。