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CAT分层类曝光控制策略研究新进展

江西师范大学学报（自然科学版） 2024年第2期48卷 139-146页

作者：刘海东虞芷筠李浩秦春影杨建芹喻晓锋江西师范大学心理学院江西南昌330022 北京师范大学中国基础教育质量监测协同创新中心北京100875 华南师范大学心理学院广东广州510631 南昌师范学院数学与信息科学学院江西南昌330032

计算机化自适应测验(computerized adaptive testing,CAT)可以根据每一名考生的不同作答进行自适应选题,提高了测验精度.但高精度也伴随着高曝光风险,分层类项目曝光控制策略作为项目曝光控制的方法之一,是近年来曝光控制研究领域的热点... 详细信息

计算机化自适应测验(computerized adaptive testing,CAT)可以根据每一名考生的不同作答进行自适应选题,提高了测验精度.但高精度也伴随着高曝光风险,分层类项目曝光控制策略作为项目曝光控制的方法之一,是近年来曝光控制研究领域的热点.同时,反应时(RT)的收集是CAT的一大优势,RT对于测验的实施具有重要价值.该文综合介绍了传统的分层策略,并结合RT的分层策略探讨当前分层策略应用于CAT项目曝光控制中存在的问题及其未来研究方向.

关键词：计算机化自适应测验反应时项目曝光控制分层策略测验时间选题策略

Dynamic Scene Graph Generation of Point Clouds with Structural Representation Learning

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Tsinghua Science and Technology 2024年第1期29卷 232-243页

作者： Chao Qi jianqin Yin Zhicheng Zhang Jin Tang School of Artificial Intelligence Beijing University of Posts and TelecommunicationsBeijing 100876China Standard and Metrology Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China

Scene graphs of point clouds help to understand object-level relationships in the 3D *** graph generation methods work on 2D structured data,which cannot be used for the 3D unstructured point cloud *** point-cloud-based methods generate the scene graph with an additional graph structure that needs labor-intensive manual *** address these problems,we explore a method to convert the point clouds into structured data and generate graphs without given ***,we cluster points with similar augmented features into groups and establish their relationships,resulting in an initial structural representation of the point ***,we propose a Dynamic Graph Generation Network(DGGN)to judge the semantic labels of targets of different *** dynamically splits and merges point groups,resulting in a scene graph with high *** show that our methods outperform other baseline *** output reliable graphs describing the object-level relationships without additional manual labeled data.

关键词： scene graph generation structural representation point cloud

Efficacy of Chinese herbal medicine in functional dyspepsia: A meta-analysis of randomized, double-blind, placebo-controlled trials

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Journal of Traditional Chinese Medical Sciences 2016年第3期3卷 147-156页

作者： Yu Guo Jiajie Zhu Xiaolan Su jianqin yang Yijie Li Qingguo Wang Wei Wei Beijing University of Chinese Medicine Beijing 10029China Department of Gastroenterology Wangjing Hospital of China Academy of Chinese Medical SciencesBeijing 10102China

Objective:To evaluate the efficacy and safety of Chinese herbal medicine(CHM)for the treatment of functional dyspepsia(FD).Methods:Web of Science,PubMed,EMBASE,Cochrane Library,and four other Chinese electronic databases,including China National Knowledge Infrastructure(CNKI),Chinese Biological Medical Database(CBM),Chinese Scientific Journals Database(VIP),and WanFang Database were used to search(up to Feb,2016)for randomized,double-blind,placebocontrolled trials recruiting adults with FD treated with *** selection,data extraction,quality assessment,and data analyses were conducted based on Cochrane standards using Review Manager ***:Fourteen publications(1424 patients)were *** revealed that CHM was more efficacious than the placebo in improving global dyspepsia symptoms(RR,1.45;95%CI,1.31e1.60),Chinese medicine syndrome(CMS)(RR,1.36;95%CI,1.23e1.50),and quality of life(SMD,0.30;95%CI,0.15e0.45)in FD ***,the difference in the incidence of adverse events between CHM and placebo groups had no statistical significance(RR,1.06;95%CI,0.66e1.70).Conclusion:This meta-analysis demonstrates that CHM has a therapeutic potential in treating FD with a certain ***,due to the restricted number of trials included,wellplanned,long-term studies are necessary to provide credible evidence.

关键词： Functional dyspepsia Meta-analysis Chinese herbal medicine Placebo

Competitive interactions between invasive fall armyworm and Asian corn borer at intraspecific and interspecific level on the same feeding guild

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Insect Science 2024年第4期31卷 1313-1325页

作者： Jingfei Guo jianqin Shi Hailiang Han Ivan Rwomushana Abid Ali Yeeyee Myint Zhenying Wang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina Zhejiang Dongyang Maize Research Institute DongyangZhejiangChina CAB International(CABI) NairobiKenya Department of Entomology University of AgricultureFaisalabadPunjabPakistan Plant Protection Division Department of AgricultureMinistry of AgricultureLivestock and IrrigationYangonMyanmar

Interspecific competition is an important factor in the population dynamics and geographical distribution of insect *** armyworm(FAW),Spodoptera frugiperda,an invasive species,and the Asian corn borer(ACB),Ostrinia furnacalis,a native pest species are major pests on maize in China,posing a threat to maize yield and grain quality.A series of laboratory,greenhouse,and field experiments were conducted to elucidate the competitive interactions between FAW and *** the laboratory experiments,FAW exhibited aggressive behaviors more frequently when compared with ACB,while the latter species exhibited defense behaviors more *** intraspecific competition was recorded in the FAW conspecific rather than in ACB,particularly in the 6th larval *** had a higher interspecific competitive advantage through intraguild predation over ACB,resulting in partial or complete displacement ACB when initially the ratio of the 2 species was 1:*** interspecific competition also had significantly influenced on the population parameters,defensive enzymes,and nutrient of these 2 *** interaction proved that the response of superoxide,catalase,and soluble protein in FAW were significantly increased,whereas the total sugar content in both species was substantially *** rate,and the plant damage that co-infested by both species varied significantly among the sequential combinations under greenhouse and field *** consistently exhibited stronger intraspecific aggression than ACB under laboratory and field conditions when co-existing on the same feeding *** findings contribute to efforts toward the improvement of integrated pest management programs for FAW,in decision making for invasive and native pests’management strategies to reduce the high risks of FAW and ACB outbreaks.

关键词： Asian corn borer defensive enzyme fall armyworm interspecific competition intraspecific competition survival rate

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Pickering乳滴固定床催化研究进展

中国科学：化学 2023年第7期53卷 1113-1124页

作者：张明李婷杨箭琴杨恒权山西大学化学化工学院太原030006

工业上精细化学品合成中液-液、气-液两相催化体系长期存在效率低的问题,不得不在间歇反应釜中进行.Pickering乳液具有大的反应界面和易于调控的微纳界面/空间,能够显著提升两相反应的催化效率,更重要的是Pickering乳液具有极高的稳定性... 详细信息

工业上精细化学品合成中液-液、气-液两相催化体系长期存在效率低的问题,不得不在间歇反应釜中进行.Pickering乳液具有大的反应界面和易于调控的微纳界面/空间,能够显著提升两相反应的催化效率,更重要的是Pickering乳液具有极高的稳定性,使其能够像传统固体颗粒催化剂一样填充到固定床反应器中,实现液-液、气-液两相催化反应的连续运行,显著提高酶催化、化学催化反应效率,推动两相催化体系向应用水平发展.本文系统概述了Pickering乳滴固定床的构建以及催化理论模型,介绍了其应用研究的最新进展,并对其未来的研究方向和发展趋势进行了展望.

关键词：两相催化 Pickering乳液固定床反应器微纳界面微纳空间

Analysis of the Influence of Different Drying Methods on the Active Ingredients of Fresh Medicine

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Chinese Medicine and Natural Products 2022年第1期2卷 1-4页

作者： jianqin yang Mingsan Miao College of Pharmacy Henan University of Chinese MedicineZhengzhouHenanChina

The heating area of the material is large and the thermal efficiency is high,but it is n ecessary to control the suitable drying temperature ofdiffere nt medici nal materials to preserve the effective in gredients.D iff ere nt kinds of Chinese medicine need different drying conditions to fulfill good drying *** drying in the shade is one of the traditional drying methods,which takes a long time and is easily affected by the *** water volatilizes *** is prone to mildew and discoloration during the drying ***,it can better preserve the volatile oil components of Chinese *** hot-air drying machine has lower *** medicinal materials have a large heating area and high thermal efficiency,but it is necessary to control the appropriate drying temperature of different medicinal materials in order to preserve the active ingredients of the medicinal materials;it is not suitable for medicinal materials that stick and bind *** microwave drying method possesses superiority in drying some valuable medicinal materials such as Ren she n(Radix et Rhizoma Ginseng)and Lurong(Co「nu Cervi Pantotrichum),and the effective ingredients are preserved at a high degree;it can also achieve the purpose of killing enzymes and protecting glycosides and have a good bactericidal effect,but it is not suitable for Chinese medicines containing heat-sensitive ingredients,because it will destroy most of the proteins,amino acids,and peptides of Chinese medicine and result in the loss of *** far-infrared drying method is suitable for drying thin-layer medicinal materials and is friendly to the ***-drying can preserve the active ingredients very well and greatly retain the efficacy,but it has obvious limitations in preserving some Chinese medicinal materials that need to kill enzymes and protect glycosides;besides,the cost is relatively high and the drying time is long.

关键词： fresh medicine drying method natural drying hot air drying microwave drying far infrared drying freeze drying

基于速率-状态摩擦定律的地震二维准动力学数值模拟:浅层正应力变化对断层演化的影响

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地球物理学报 2018年第8期61卷 3198-3210页

作者：申文豪薛腾飞张景发杨建钦中国地震局地壳应力研究所(地壳动力学重点实验室) 北京100085 中海油研究总院北京100027

本文基于结合速率-状态摩擦定律(RSF)的二维准动力学数值模型,以半空间垂直走滑断层为研究对象,通过比较两种正应力随深度变化模型的模拟结果,研究了浅层正应力变化对断层演化参数、地震孕育过程、震后滑移传播等方面的影响.结果显示,... 详细信息

本文基于结合速率-状态摩擦定律(RSF)的二维准动力学数值模型,以半空间垂直走滑断层为研究对象,通过比较两种正应力随深度变化模型的模拟结果,研究了浅层正应力变化对断层演化参数、地震孕育过程、震后滑移传播等方面的影响.结果显示,我们的数值模型在给定模型参数和约束条件下,能够完整模拟出地震周期中震间、震前、同震以及震后多个特征阶段.常数正应力模型下,动态破裂在浅层速率强化区停止,而在浅层变化正应力模型下动态破裂可以传播至自由表面,导致浅层更高的最大滑移速率和同震滑移量.两种模型下的地震矩、地震周期、平均应力降和震后滑移传播等差别不明显.两种滑移模型的傅氏振幅谱与理论K-2模型傅氏振幅谱均符合较好,且浅层变化正应力模型下的拐角波数值高于常数正应力模型,说明两种模型均符合地震同震滑移模型的运动学特征,并且浅层变化正应力模型下最终应该产生高于常数正应力模型的高频强地面运动水平.我们认为选用不同的模型参数对最终结果存在显著影响,应当根据具体问题来选择模型参数,这样才能在保证结果准确前提下有效提高计算效率.

关键词：速率-状态摩擦定律准动力学数值模拟断层演化地震参数

用于处理不努力作答的标准化残差系列方法和混合多层模型法的比较

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心理学报 2022年第4期54卷 411-425页

作者：刘玥刘红云游晓锋杨建芹四川师范大学脑与心理科学研究院成都610066 应用实验心理北京市重点实验室北京师范大学心理学部北京100875 南昌师范学院数学与信息科学学院南昌360111

文章采用模拟研究,分别在混合多层模型假设满足和违背的情境下,比较了混合多层模型方法与标准化残差系列方法在识别不努力作答和参数估计方面的表现。结果显示:(1)不存在不努力作答或其严重性低时,各方法表现接近;(2)不努力作答严重性高... 详细信息

文章采用模拟研究,分别在混合多层模型假设满足和违背的情境下,比较了混合多层模型方法与标准化残差系列方法在识别不努力作答和参数估计方面的表现。结果显示:(1)不存在不努力作答或其严重性低时,各方法表现接近;(2)不努力作答严重性高时,固定参数迭代标准化残差法普遍更优,混合多层模型法仅在假设满足且两种作答反应时差异大的条件下表现较好。建议实际应用中优先选择固定参数迭代标准化残差法。

关键词：不努力作答标准化反应时残差迭代净化混合多层模型贝叶斯估计

Vibration properties of Paulownia wood for Ruan sound quality using machine learning methods

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Journal of Forestry Research 2024年第5期35卷 216-222页

作者： yang yang College of Art and Design Harbin UniversityHarbin 150076People’s Republic of China College of Mechanical and Electrical Engineering Northeast Forestry UniversityHarbin 150040People’s Republic of China

As an important material for manufacturing resonant components of musical instruments,Paulownia has an important influence on the sound quality of *** this paper,a model for evaluating the sound quality of Ruan based on the vibration characteristics of wood is developed using machine learning ***,the selection of materials for Ruan manufacturing relies primarily on manually weighing,observing,striking,and listening by the instrument *** in scientific theory have hindered the quality of the finished *** this study,nine Ruans were manufactured,and a prediction model of Ruan sound quality was proposed based on the raw material information of *** of a total of 180 data sets,145 and 45 sets were chosen for training and validation,*** this paper,typical correlation analysis was used to determine the correlation between two single indicators in two adjacent pairwise combinations of the measured objects in each stage of the production process in *** vibra-tion characteristics of the wood were tested,and a model for predicting the evaluation of Ruan’s acoustic qualities was developed by measuring the vibration characteristics of the resonating plate *** acoustic quality of the Ruan sound board wood was evaluated and predicted using machine learning model generalized regression neural *** results show that the prediction of Ruan sound quality can be achieved using Matlab simulation based on the vibration characteristics of the soundboard *** the model-predicted values were compared with the tradi-tional predicted results,it was found that the generalized regression neural network had good performance,achieving an accuracy of 93.8%which was highly consistent with the experimental *** was concluded that the model can accurately predict the acoustic quality of the Ruan based on the vibration performance of the soundboards.

关键词： Sound quality Wood vibration performance Paulownia wood Machine learning methods