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希托夫法测定离子迁移数的影响因素探究

大学化学 2024年第4期39卷 94-99页

作者：才东奇田福平赵泽瑞张艳娟戴岳黄斐斐王瑜大连理工大学化学学院辽宁大连116024

离子迁移数作为物理化学课程中电化学部分的一个重要概念,其测定实验被设置在多所高校的物理化学实验课程中。文献调研及过往教学实践表明,使用希托夫(Hittorf)法测定的离子迁移数,结果与文献值有较大出入。为了降低测定误差,以及探究... 详细信息

离子迁移数作为物理化学课程中电化学部分的一个重要概念,其测定实验被设置在多所高校的物理化学实验课程中。文献调研及过往教学实践表明,使用希托夫(Hittorf)法测定的离子迁移数,结果与文献值有较大出入。为了降低测定误差,以及探究测试结果的影响因素,本实验从溶液装液量控制、断液断电顺序、计算电量的数据来源三个方面进行改进,尽可能降低实验操作和浓度测定导致的误差,从而分析真正影响测试结果的因素。实验表明,当采用电流乘以时间作为电量的数据来源,且采用阴极区溶液计算离子迁移数时,所得结果更接近实验参考值。

关键词：离子迁移数希托夫法影响因素分光光度法

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非遗短视频用户信息需求特征及其参与行为研究——以“黄梅戏”短视频在线评论为例

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现代情报 2022年第8期42卷 74-84页

作者：徐孝娟赵泽瑞安徽大学管理学院安徽合肥230039

[目的/意义]短视频作为非物质文化遗产传播最具影响力的新媒体平台,对其用户非遗信息需求特征、参与因素以及各因素对用户参与行为作用关系进行探索,有助于提升短视频情境下非遗文化用户参与体验,并推动短视频平台中非遗文化垂直内容的... 详细信息

[目的/意义]短视频作为非物质文化遗产传播最具影响力的新媒体平台,对其用户非遗信息需求特征、参与因素以及各因素对用户参与行为作用关系进行探索,有助于提升短视频情境下非遗文化用户参与体验,并推动短视频平台中非遗文化垂直内容的良好发展。[方法/过程]本研究选取“黄梅戏”非遗短视频为例,以用户热门评论内容及用户统计学特征信息作为数据基础,基于信息生态学理论和卷入度文献,利用扎根理论提取“信息人、信息、信息环境和信息技术”4个信息生态因子维度作为影响因素,感知卷入及认知卷入作为用户机体中介变量,线上行为和线上迁移线下行为作为结果变量,人口统计学特征中如地域、年龄等作为调节变量,挖掘了用户信息需求特征,共同构建了非遗短视频用户参与行为模型。[结果/结论]结果发现,本研究范畴逻辑与S-O-R理论框架具有一致性,各因素及作用关系有效拓展了S-O-R框架;其次,卷入度受信息人、信息维度影响最大,用户的非遗信息需求特征聚焦在“信息人—唱功实力”“信息—内容剧情”“信息环境—距离拟近”及“信息技术—社交互动”方面;且情感和认知卷入度对用户参与行为均产生积极影响,其中参与行为对情感卷入存在较大依赖;此外,非遗文化短视频呈现出特有的“虚—实”类情境应用属性,反应R维度的探究需突破影响因素均来自线上,实际线下因素,如线下打卡,同样具有效用影响。

关键词：非物质文化遗产短视频用户评论用户参与行为

基于CNN-LSTM-SES组合模型的负载预测

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内蒙古民族大学学报（自然科学版） 2024年第3期39卷 67-74页

作者：郭翔宋初一宋泽瑞郭淑妮胡应钢姜静清内蒙古民族大学数学科学学院内蒙古通辽028043 三亚学院信息与智能工程学院海南三亚572000 内蒙古民族大学计算机科学与技术学院内蒙古通辽028043

随着云计算和大数据技术的快速发展,负载预测作为可优化资源分配和提高系统性能的关键任务受到了广泛关注。为了更好地对负载进行长短期时序预测和提高负载预测精度,提出了一种卷积神经网络(CNN)、长短时记忆网络(LSTM)和一次指数平滑(S... 详细信息

随着云计算和大数据技术的快速发展,负载预测作为可优化资源分配和提高系统性能的关键任务受到了广泛关注。为了更好地对负载进行长短期时序预测和提高负载预测精度,提出了一种卷积神经网络(CNN)、长短时记忆网络(LSTM)和一次指数平滑(SES)的组合模型,并采用麻雀搜索算法(SSA)优化模型参数。经过处理的数据集分别输入到SSA-CNN-LSTM模型和SSA-SES模型中,然后对这2个模型的输出值用权重系数法进行组合得出最终的输出值。实验结果表明,本文模型在阿里云公开数据集Cluster-trace-v2018上的云计算负载预测中的性能评估值,相较于CNN-LSTM、SES、CNN-LSTM-SES、SSA-CNN-LSTM与SSA-SES模型,预测精度更高。

关键词：负载预测麻雀搜索算法卷积神经网络长短时记忆网络一次指数平滑

聚偏氟乙烯/聚砜纳米纤维滤膜的性能优化研究

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云南化工 2024年第1期51卷 42-45页

作者：何钞邓宏凯胡梦晗王泽瑞曹宇刘莹陈晓昀梧州学院机械与资源工程学院广西梧州543002 贺州学院校团委广西贺州542899

以聚偏氟乙烯、聚砜为原料,利用静电纺丝法制备了聚偏氟乙烯/聚砜纳米纤维滤膜,研究铸膜液配方和制备工艺参数对复合膜的力学性能、透气性能和过滤性能的影响。结果表明,聚砜的加入,大大提高了聚偏氟乙烯纳米纤维滤膜的综合性能。当聚... 详细信息

以聚偏氟乙烯、聚砜为原料,利用静电纺丝法制备了聚偏氟乙烯/聚砜纳米纤维滤膜,研究铸膜液配方和制备工艺参数对复合膜的力学性能、透气性能和过滤性能的影响。结果表明,聚砜的加入,大大提高了聚偏氟乙烯纳米纤维滤膜的综合性能。当聚偏氟乙烯、聚砜、DMAC的质量分数分别为16%、4%、80%时,滤膜的综合性能最好,滤膜的平均接触角、断裂伸长率、平均孔径和气体渗透率分别为119.54°、35.25%、4.1567μm和3.59×10^(-5)m^(3)/(m^(2)·Pa·s);与聚偏氟乙烯纳米纤维滤膜相比,复合膜的平均接触角提高了5.52%,断裂伸长率提高了40.05%,平均孔径下降了33.12%,气体渗透率提高了10.26%。膜内部纤细且丰富的3D贯穿孔隙结构为化学杀菌剂的引入提供更多的载点,可进一步提高复合膜的抗菌性能。

关键词：聚砜聚偏氟乙烯气体渗透率静电纺丝纳米纤维滤膜

Research on active disturbance rejection control method for turbine blade tip clearance

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Science China(Technological Sciences) 2019年第10期62卷 1795-1804页

作者： WANG WeiMin SHAO Xing LI QiHang Gao JinJi HAO zerui Beijing Key Laboratory of Health Monitoring and Self-Recovery for High-End Mechanical Equipment Beijing University of ChemicalTechnologyBeijing100029China Department of Mechanical Engineering Tsinghua UniversityBeijing100084China

Blade tip clearance(BTC) is one of the key factors affecting the efficiency and reliability of high performance turbomachinery such as heavy duty steam turbines, aircraft engines and other gas turbo machines. The self-adjusting ability of BTC according to the operation condition changing is important to meet the requirement of performance. In this paper, the principle and method of adjusting the BTC by controlling the axial displacement of the rotor were proposed and studied. The basic principle is that the BTC of the turbomachinery with a conical tail shroud will be affected by the axial displacement of rotor and thereby can be adjusted by controlling the axial position of rotor, which can be adjusted by the controllable oil pressure acting on the thrust bearing. To reach a higher control precision, lower noise and model perturbation, an adaptive quasi-sliding mode control(AQSMC) algorithm based on the disturbance observer(DOB) was designed, and numerical and experimental investigations were carried out. The numerical simulation results show that this algorithm can not only effectively suppress the disturbance, but also, compared with the general reaching law, effectively reduce the chattering and transient high gain switching effect of the closed-loop controller system and avoid the instability caused by the controller. Based on the DOB-AQSMC algorithm, the BTC was stabilized within 2 s with no overshoot and no misalignment in the test rig, and this algorithm achieves a better control performance than the proportion-integral-differential(PID) algorithm. These achievements can be used to push forward the intelligent turbomachinery development.

关键词： blade tip clearance turbomachinery active disturbance rejection control DOB-AQSM method

国医大师王晞星内外合治放射性直肠炎经验撷菁

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天津中医药 2024年第4期41卷 414-418页

作者：石智尧任少键赵成功陈泽瑞刘佳佳王晞星山西中医药大学太原030024 山西省中医药研究院太原030012

放射性直肠炎(RP)作为盆腔恶性肿瘤放射治疗后常见的并发症之一,其发病率逐年增加。由于西医治疗目前无特异性药物,且病情易反复、长期效果不佳等缺点,严重影响了肿瘤患者的生活质量。国医大师王晞星教授根据多年诊疗经验,认为应当内外... 详细信息

放射性直肠炎(RP)作为盆腔恶性肿瘤放射治疗后常见的并发症之一,其发病率逐年增加。由于西医治疗目前无特异性药物,且病情易反复、长期效果不佳等缺点,严重影响了肿瘤患者的生活质量。国医大师王晞星教授根据多年诊疗经验,认为应当内外合治RP,临床疗效显著。本文深入剖析王晞星教授3期诊治RP之病机及治法方药,介绍肠瑞灌肠剂等外治方法。并附验案1则加以佐证,以期为临床提供参考。

关键词：放射性直肠炎内外合治肠瑞灌肠剂国医大师王晞星

Detrital Zircon Geochronology of Early Jurassic Successions in the Central Yunnan Basin， SW China: Implications of Sedimentary Provenance and Tectonic Evolution

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Journal of Earth Science 2023年

作者： LiangDong Luo Jun Wang YuJie Yuan zerui Liu MengYan Jiao YingAo Zhang SaiKe Zhang School of Earth Sciences China University of Geosciences Yunnan Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization MNR School of Earth Sciences Yunnan University

The Central Yunnan Basin (CYB) that tectonically located on the southwest margin of the Yangtze Block and to the eastern segment of the Paleo-Tethys tectonic domain， is a typical ‘red bed’ sedimentary basin formed since Late Triassic. The CYB is composed of mega-thick fluvial and lacustrine facies successions. However， the tectonic evolution and sedimentary provenance studies on this basin are scarce. In this study， we report new detrital zircon ages of four sandstones from the Lower Jurassic Fengjiahe Formation (FJF)， including four major clusters of 1 810–2 060， 760–870， 430–485， and 254–280 Ma， with sporadic Archean， Cambrian， and Triassic ages. We interpret that the Archaean and Proterozoic zircons were mainly derived from the western Yangtze Block， which may recycle from the Jiangnan Orogen， the Cathaysia Block and the Proterozoic igneous rocks. Ordovician and Silurian zircons were probably from the Ailaoshan orogenic belt， and the Lancang Group in western Yunnan， as well as the Yangtze， Cathaysia and Indosinian Blocks. Permian zircons probably came from the Ailaoshan orogenic belt and the Emeishan basalt. The youngest zircon age of ～212.9 Ma indicates that the depositional age of the FJF is younger than the Norian stage. We also proposed a geodynamic model of the CYB and the Ailaoshan orogenic belt during the Mesozoic. The Simao Block to the west of the CYB constituted the Ailaoshan orogenic belt and collaged with the Yangtze Block during the Early Triassic， provided sedimentary provenance to the CYB. The Changning-Menglian zone that composed of the Baoshan and the Simao Blocks， uplifted in the Late Triassic and provided provenance to the CYB. Collapse of the Ailaoshan orogenic belt in Late Triassic probably provided channel for source materials that transported from the Lincang granites to the CYB. We propose a transtensional tectonic setting of the central Yunnan during the Early Jurassic， after a short collision during the Indosinian movement in the Late Tr

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A networked remote sensing system for on-road vehicle emission monitoring

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Science China(Information Sciences) 2017年第4期60卷 224-231页

作者： Yu KANG Yan DING zerui LI Yang CAO Yunbo ZHAO State Key Laboratory of Fire Science University of Science and Technology of China Department of Automation University of Science and Technology of China Institute of Advanced Technology University of Science and Technology of China Chinese Research Academy of Environmental Sciences College of Information Engineering Zhejiang University of Technology

Vehicle emissions are a major source of urban air pollution, and therefore a real-time monitoring system can be very useful in analyzing such emission and consequently assisting the policy making process. In this work we discuss the principle and structure of three different types of remote sensing detectors, and also the key techniques to establish a networked remote sensing monitoring system. We finally conclude this paper with data analysis from some preliminary experiments.

关键词： networked system remote sensing vehicle emissions

The Long Noncoding RNA-H19 and Pituitary Adenomas

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The Long Noncoding RNA-H19 and Pituitary Adenomas