网络调查及其局限性分析

互联网的迅速发展,给统计调查方法带来了巨大的影响,在互联网的基础上发展起来的网络调查法,以其独特的优势,日益受到人们的青睐。本文在对网络调查的优势进行研究的基础上,分析了网络调查的局限性,并对如何正确使用网络调查提出了一些建议。     

医学期刊索引编印中存在的问题及对策

为了了解医学期刊编印索引的情况和编印各种索引的可行性与实用性,对医学期刊进行了3次随机抽样调查.结果是:编印的索引混乱,而且只用了3种索引,即总目次、主题索引和著者索引.认为:每种医学期刊应同时编印2种索引,即主题索引和著者索引,总目次可不编印;应修订GB/T3179-1992有关索引的规定.     

关于随机抽样教学的探讨

结合教学实践,对在随机抽样教学中如何充实内容,合理地处理教材,以激发学生的求知欲望,培养其创新能力等问题进行了探讨。     

关系数据库中近似查询的自动采样改进方法研究

海量数据的传统精确查询易导致负载过大,而通过改进数据库近似查询自动采样,预先运行样本查询,然后根据每一个元组在样本关系表中出现的次数,将每个元组需要的存储信息作为元组的属性添加进数据表中,并通过DBMS在整个自动抽样过程对它们进行管理,对所得的结果进行分类并统计,得出每次采样过程中某个元组出现的次数,实验表明方法是有效的。     

基于重排序集抽样的符号检验

提出基于重排序集抽样的符号检验,给出相应的极限分布,并讨论了相对于基于简单随机抽样和排序集抽样的符号检验统计量的渐近效率,得出此检验具有较高的功效。     

深海技术装备研制现状与展望

历经近半个世纪的努力,我国海洋技术与装备取得了长足的进步和发展,尤其是近年来,深海技术与装备的发展为我国海洋科学的创新提供了新的动力。中科院战略性先导科技专项"热带西太平洋海洋系统物质能量交换及其影响"以科学需求为导向,追踪国际前沿,立足我国深海技术装备发展现状,提出研制科学应用目标明确的深海探测与作业装备,形成具备利用自主式观测系统、连续观测与作业系统以及新型海洋传感器及采样设备开展综合性海洋探测与作业的能力。专项执行4年的时间,深海技术装备面向专项科学目标,形成了具有完全自主知识产权的技术装备,形成了一批有影响的成果,为海洋科学研究提供了先进的技术手段,推动了我国深海探测与作业技术的发展,在我国深海技术装备发展中发挥了重要的先导作用。     

Acquisition,Preference and Follow-up Comparison Across Three AAC Modalities Taught to Two Children with Autism Spectrum Disorder

Identifying an augmentative and alternative communication (AAC) method for children with autism spectrum disorder (ASD) might be informed by comparing their performance with, and preference for, a range of communication modalities. Towards this end, the present study involved two children with ASD who were taught to request the continuation of toy play by: (a) signing MORE, (b) exchanging a picture card representing MORE, and (c) touching a MORE symbol from the screen of a speech-generating device. The children were also given opportunities to choose among the three modalities to identify their preferred method of communication. Both children performed better with picture exchange and the speech-generating device than with manual signing, but had variable performance during follow-up. Both children more often chose the speech-generating device, suggesting a preference for that modality. We conclude that concurrent intervention across several communication methods can generate data to inform the selection of an AAC modality.     

汽车煤机械采样装置性能测试与保养

通过大唐淮南洛河发电厂应用的汽车煤机械采样装置应用实例,介绍了汽车煤机械采样装置的性能测试过程、测试结果分析以及基本的维护保养措施,为汽车煤机械采样装置的合理使用提供了参考经验。     

我国民众心理和谐状况研究

心理和谐是国家构建和谐社会的重要组成部分。项目组采用质化和量化研究相结合的方法,理清了心理和谐的内涵和结构,自主开发出满足心理测量学要求的测量工具。在全国进行了较大规模的抽样调查,初步揭示了我国民众当前的心理和谐状况,并基于研究结果,提出了心理和谐建设的政策建议。     

Be flexible! learn to debias by sampling and prompting for robust visual question answering

Recent studies point out that VQA models tend to rely on the language prior in the training data to answer the questions, which prevents the VQA model from generalization on the out-of-distribution test data. To address this problem, approaches are designed to reduce the language distribution prior effect by constructing negative image–question pairs, while they cannot provide the proper visual reason for answering the question. In this paper, we present a new debiasing framework for VQA by Learning to Sample paired image–question and Prompt for given question (LSP). Specifically, we construct the negative image–question pairs with certain sampling rate to prevent the model from overly relying on the visual shortcut content. Notably, question types provide a strong hint for answering the questions. We utilize question type to constrain the sampling process for negative question–image pairs, and further learn the question type-guided prompt for better question comprehension. Extensive experiments on two public benchmarks, VQA-CP v2 and VQA v2, demonstrate that our model achieves new state-of-the-art results in overall accuracy, i.e., 61.95% and 65.26%.