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Analysis of Deep Convective Towers in a Southwest-Vortex Rainstorm Event

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Journal of Tropical Meteorology 2021年第2期27卷 177-190页

作者： ZHAI Dan-hua KONG Fan-you dai Ze-jun GAO Song DENG Cheng-zhi ZHANG Yong Chongqing Meteorological Observatory Chongqing 401147 China Center for Analysis and Prediction of Storms University of OklahomaNorman 73072 USA Hunan Meteorological Observatory Changsha 410118 China Chongqing Institute of Meteorological Sciences Chongqing 401147 China

The structure and organization of the extreme-rain-producing deep convection towers and their roles in the formation of a southwest vortex(SWV)event are studied using the intensified surface rainfall observations,weather radar data and numerical simulations from a high-resolution convection-allowing *** deep convection towers occurred prior to the emergence of SWV and throughout its onset and development *** largely resemble the vortical hot tower(VHT)commonly seen in typhoons or hurricanes and are thus considered as a special type of VHT(sVHT).Each sVHT presented a vorticity dipole structure,with the upward motion not superpose the positive vorticity.A positive feedback process in the SWV helped the organization of sVHTs,which in turn strengthened the initial disturbance and development of *** meso-γ-scale large-value areas of positive relative vorticity in the mid-toupper troposphere were largely induced by the diabatic heating and *** strong mid-level convergence was attributed to the mid-level vortex *** low-level vortex intensification was mainly due to low-level convergence and the stretching of upward *** meso-α-scale large-value areas of positive relative vorticity in the low-level could expand up to about 400 hPa,and gradually weakened with time and height due to the decaying low-level convergence and vertical stretching in the matured *** the SWV matured,two secondary circulations were formed,with a weaker mean radial inflow than the outflow and elevated to 300-400 hPa.

关键词： southwest vortex deep convective towers diabatic heating secondary circulations heavy rain

Preliminary experimental study on applicability of Lorentz force velocimetry in an external magnetic field

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Nuclear Science and Techniques 2018年第6期29卷 28-35页

作者： Yan-Qing Tan Run-Cong Liu Shang-jun dai Xiao-Dong Wang Ming-Jiu Ni Juan-Cheng Yang Nataliia Dubovikova Yurii Kolesnikov Christian Karcher College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences The Fifth Electronics Research Institute Ministry of Industry and Information Technology School of Engineering Science University of Chinese Academy of Sciences Institute of Thermodynamics and Fluid Mechanics Ilmenau University of Technology

Lorentz force velocimetry(LFV) is a noncontact technique for measuring electrically conducting fluids based on the principle of electromagnetic induction. This work aims to answer the open and essential question of whether LFV can work properly under a surrounding external magnetic field(ExMF). Two types of Ex MFs with different magnetic intensities were examined: a magnetic field with a typical order of 0.4 T generated by a permanent magnet(PM) and another generated by an electromagnet(EM) on the order of 2 T. Two forces, including the magnetostatic force between the Ex MF and PM in the LFV, and the Lorentz force generated by the PM in LFV were measured and analyzed in the experiment. In addition,Ex MFs of varying strengths were added to the LFV, and the location of the LFV device in the iron cores of the EM was considered. The experimental outcomes demonstrate that it is possible for a LFV device to operate normally under a moderate Ex MF. However, the magnetostatic force will account for a high proportion of the measured force,thus inhibiting the normal LFV operation, if the Ex MF is too high.

关键词： Lorentz 外部磁场试验性适用性学习设备操作永久磁铁测量基

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管棚超前支护隧道掘进周边控制爆破方法

辽宁工程技术大学学报（自然科学版） 2011年第2期30卷 225-228页

作者：戴俊西安科技大学建筑与土木工程学院陕西西安710054 麦吉尔大学采矿金属与材料工程系

为了改善松软岩隧道,采用管棚超前支护条件下的周边爆破效果,分析了隧道开挖周边爆破效果差的原因,以及改善周边控制爆破效果的方法。研究表明:周边眼及二圈眼应以较大角度向外倾斜钻进,通过按光面爆破要求进行二圈眼爆破参数设计,实行... 详细信息

为了改善松软岩隧道,采用管棚超前支护条件下的周边爆破效果,分析了隧道开挖周边爆破效果差的原因,以及改善周边控制爆破效果的方法。研究表明:周边眼及二圈眼应以较大角度向外倾斜钻进,通过按光面爆破要求进行二圈眼爆破参数设计,实行间隔炮眼不等装药,间隔分段起爆等,可为周边眼爆破创造良好条件;进一步得到了相应的二圈眼和周边眼爆破参数确定方法,有助于达到充分利用炸药能量,降低周边控制爆破对隧道围岩的损伤,实现良好的周边控制爆破效果;算例表明:二圈眼间距和最小抵抗线均小于周边眼的相应值,计算结果与工程实践相符。对提高松软岩石的爆破施工效率有参考价值。

关键词：隧道掘进前支护边爆破制爆破松软岩石

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我国教育理论研究方法论演进的话语谱系论析

东北师大学报（哲学社会科学版） 2009年第6期 205-212页

作者：戴军北京师范大学教育学部北京100875

笔者以《教育研究》杂志从创刊至今30年的"文本话语"作为考证对象,通过运用谱系学话语分析的方法,以间断性的、断裂的"话语"为证据,挖掘和梳理出我国教育理论研究方法论从以自然科学研究范式的教育实验研究向以后现代人文研究范式的人... 详细信息

笔者以《教育研究》杂志从创刊至今30年的"文本话语"作为考证对象,通过运用谱系学话语分析的方法,以间断性的、断裂的"话语"为证据,挖掘和梳理出我国教育理论研究方法论从以自然科学研究范式的教育实验研究向以后现代人文研究范式的人类学研究——质的研究——叙事研究演进的话语谱系,进而揭示后现代思维模式对我国教育理论研究方法论演进的重要影响。

关键词：教育理论研究方法论演进话语谱系

后现代哲学思潮对我国教育基本理论研究的影响论要

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东北师大学报（哲学社会科学版） 2008年第4期 162-167页

作者：戴军东北师范大学教育科学学院吉林长春130024

后现代哲学思潮作为一种现今教育理论研究界的热点思潮,以其自身的批判性、否定性、超越现代性、本土化、民族化、提倡创新精神的思维特征,影响着我国教育基本理论研究方法论、教育基本理论研究观以及教育基本理论研究视域。我们认为,... 详细信息

后现代哲学思潮作为一种现今教育理论研究界的热点思潮,以其自身的批判性、否定性、超越现代性、本土化、民族化、提倡创新精神的思维特征,影响着我国教育基本理论研究方法论、教育基本理论研究观以及教育基本理论研究视域。我们认为,这种影响背后的深层原因与东西方文化传统的不谋而合;与东西方政治观念碰撞所引发的理论变迁,与理论研究积极呼唤创新和批判的时代精神密不可分。

关键词：后现代哲学思潮教育基本理论研究方法论研究观研究视域

中国权证市场的价格偏误及其均衡期权定价模型研究

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管理评论 2010年第12期22卷 28-35页

作者：代军武汉科技大学管理学院武汉430081

本文使用Black-Scholas期权定价模型和EGARCH参数估计方法对中国权证市场的当前价格偏误情况进行了研究。结果显示,在引入创设机制后的2006年至2008年,中国权证市场的整体价格偏误程度依然较高,同时呈现出随权证市场价格下降而急剧上升... 详细信息

本文使用Black-Scholas期权定价模型和EGARCH参数估计方法对中国权证市场的当前价格偏误情况进行了研究。结果显示,在引入创设机制后的2006年至2008年,中国权证市场的整体价格偏误程度依然较高,同时呈现出随权证市场价格下降而急剧上升的变化趋势。针对上述现象,本文通过理论推导提出了基于市场均衡条件下的期权定价模型,并以马钢CWB1认购权证为例实证检验了该模型的定价效果,最后得出忽略权证的价格泡沫、市场溢价和波动率估计误差是导致我国权证市场价格偏误较高的主要原因。

关键词：价格偏误 EGARCH参数估计均衡期权定价模型

Study of the Binding Mode of Quaternary Ammonium Cationic Surfactant to Firefly Luciferase and the Prediction of Binary Mixture Toxicity

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Chinese Journal of Structural Chemistry 2020年第6期39卷 1167-1177页

作者： MO Ling-Yun MA Wen KONG Song QIN Li-Tang LIANG Yan-Peng dai jun-Feng LIU Shu-Shen College of Environmental Science and Engineering Guilin University of TechnologyGuilin 541004China Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology Guilin University of TechnologyGuilinGuangxi 541004China Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology for Science and Education Combined with Science and Technology Innovation Base Guilin University of TechnologyGuilin 541004China Key Laboratory of Yangtze River Water Environment Ministry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China

The wide use of quaternary ammonium cationic surfactants(QACs)results in their release into the *** surfactants have significant ***,existing toxicity data on QACs are still lacking,especially regarding the joint toxic effects of their *** computer simulation technology,molecular docking technology is commonly used for studying the mode of action of receptors docking with *** research of QACs mixture interaction is relatively rare,and the binding mode of QACs is *** this study,molecular docking technology was applied to explore the QAC binding mode,and the concentration addition(CA)and independent action(IA)models were applied for predicting the mixture *** luciferase(FLuc)was used as a macromolecular receptor,and five typical QACs:benzalkonium bromide(BLB),tetraethylammonium bromide(TLB),N,N,N-trimethyl-1-tetradecyl ammonium bromide(CTE),tetrabutylammonium chloride(TAC),and dodecyltrimethylammonium chloride(DTC)were used as small molecule *** docking technology was used to investigate the binding mode of macromolecules and small *** luminescence inhibitory effects of individual compounds and binary mixture on FLuc were determined by microplate toxicity assay of *** prediction of mixture toxicity was performed by CA and *** results showed that the relative toxicity follows:TLB

关键词： molecular docking firefly luciferase binding mode CA IA

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融合移位窗口注意力的光流计算方法

计算机辅助设计与图形学学报 2024年第8期36卷 1255-1262页

作者：安峰戴军韩振苏州工业园区服务外包职业学院智能制造学院苏州215123 同济大学经济与管理学院上海210092

针对端到端的光流计算方法容易受限于运动模糊、遮挡和大位移的问题,通过引入注意力机制实现对遮挡像素进行更准确的预测,提出一种融合移位窗口注意力的光流计算方法.首先使用移位窗口注意力对原有的特征图进行特征增强,获取更具全局自... 详细信息

针对端到端的光流计算方法容易受限于运动模糊、遮挡和大位移的问题,通过引入注意力机制实现对遮挡像素进行更准确的预测,提出一种融合移位窗口注意力的光流计算方法.首先使用移位窗口注意力对原有的特征图进行特征增强,获取更具全局自相似性的特征,弥补了卷积特征的局部性特点;然后使用移位窗口注意力进行相关体解析,包括2D运动向量解析和光流增量的计算,获得更准确的光流增量;最后引入遮挡图作为位置编码,在计算注意力时考虑更多的像素位置关系.实验结果表明,在Sintel数据集上,端到端的误差达到1.33;在FlyingChairs数据集上,单帧计算时间为69 ms,比全局运动聚合方法减少4.2%,超过了常见光流计算方法的精度和效率.

关键词：光流计算自注意力机制移位窗口注意力位置编码

Simultaneous determination of curcumin and quercetin in Curcumin-quercetin compound self-microemulsifying drug delivery system by HPLC

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Simultaneous determination of curcumin and quercetin in Curc...