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基于时间感知Transformer的交通流预测方法

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计算机科学 2023年第11期50卷 88-96页

作者：刘起东刘超越邱紫鑫高志敏郭帅刘冀钊符明晟郑州大学计算机与人工智能学院郑州450001 智能集群系统教育部工程研究中心郑州450001 国家超级计算郑州中心郑州450001 兰州大学信息科学与工程学院兰州730000 电子科技大学计算机科学与工程学院成都611731

作为智能交通系统的关键一环,交通流预测面临着长时预测不准的难题,其主要挑战在于交通流数据本身具有复杂的时空关联。近年来,Transformer的提出使得时序数据预测的研究取得了巨大进展,但将Transformer应用于交通流预测仍然存在以下两... 详细信息

作为智能交通系统的关键一环,交通流预测面临着长时预测不准的难题,其主要挑战在于交通流数据本身具有复杂的时空关联。近年来,Transformer的提出使得时序数据预测的研究取得了巨大进展,但将Transformer应用于交通流预测仍然存在以下两个问题:1)静态的注意力机制难以捕获交通流随时间动态变化的时空依赖关系;2)采用自回归的预测方式会引发严重的误差累积现象。针对以上问题,提出了一种基于时间感知Transformer的交通流预测模型。首先,设计了一种新的时间感知注意力机制,可以根据时间特征定制注意力计算方案,从而更精准地反映时空依赖关系;其次,在Transformer的训练阶段舍弃了Teacher Forcing机制,并采用非自回归的预测方式来避免误差累积问题;最后,在两个真实交通数据集上进行实验,实验结果表明,所提方法可以有效捕获交通流的时空依赖,相比最优的基线方法,长时预测性能提升了2.09%~4.01%。

关键词：交通流预测时空建模时间感知注意力机制非自回归 Transformer

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中药挥发油微乳凝胶剂的研究进展

中国药房 2022年第22期33卷 2812-2816页

作者：刘慧殷佳王静宜刘超越王信李静蔚傅春升山东中医药大学药学院济南250355 山东中医药大学附属医院甲状腺乳腺外科济南250011 潍坊医学院麻醉学院山东潍坊261053 山东中医药大学附属医院药学部济南250011 山东中医药大学附属医院科技处济南250011

中药挥发油微乳凝胶剂具备微乳和凝胶的双重特点,可提高药物的溶解度和稳定性,促进药物吸收并达到长效缓释的效果,近年来在内科、妇科、儿科等临床疾病中的应用日趋广泛。本文通过检索相关文献,对中药挥发油微乳凝胶剂的特点、处方设计... 详细信息

中药挥发油微乳凝胶剂具备微乳和凝胶的双重特点,可提高药物的溶解度和稳定性,促进药物吸收并达到长效缓释的效果,近年来在内科、妇科、儿科等临床疾病中的应用日趋广泛。本文通过检索相关文献,对中药挥发油微乳凝胶剂的特点、处方设计、成型工艺、质量评价进行综述。结果发现,中药挥发油微乳凝胶剂具有提高药物稳定性、增加药物经皮渗透、黏附性强、易洗除、制备方便等特点。处方设计由油相、表面活性剂、助表面活性剂、凝胶基质组成。成型工艺包含微乳的成型工艺和凝胶的成型工艺,其中微乳的形成主要利用伪三元相图法。质量评价分为中药挥发油和微乳凝胶两部分,挥发油的质量评价可从定性及定量两个方面进行研究,微乳凝胶需满足相关规定并进行体外释放和透皮吸收实验。

关键词：中药挥发油微乳凝胶处方设计成型工艺质量评价

新型冠状病毒肺炎疫情缓役阶段护理人员心理现状调查及应对方式

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华北理工大学学报（医学版） 2021年第1期23卷 73-76页

作者：刘璇璇刘超越库雪飞李丽娜华北理工大学心理与精神卫生学院河北唐山063210 苏州大学护理学院华北理工大学期刊社

目的了解新型冠状病毒肺炎(以下简称新冠肺炎)疫情缓役阶段护理人员心理现状及应对方式,为护理人员的心理干预提供依据。方法于2020年4月20~24日选取唐山地区164名护理人员,采用一般资料调查问卷、焦虑自评量表(SAS)、抑郁自评量表(SDS... 详细信息

目的了解新型冠状病毒肺炎(以下简称新冠肺炎)疫情缓役阶段护理人员心理现状及应对方式,为护理人员的心理干预提供依据。方法于2020年4月20~24日选取唐山地区164名护理人员,采用一般资料调查问卷、焦虑自评量表(SAS)、抑郁自评量表(SDS)、简易应对方式问卷(SCSQ)进行调查。结果164名护理人员SAS、SDS得分均显著高于常模;焦虑状态检出率为28.0%,抑郁状态检出率为32.9%;焦虑状态组与非焦虑状态组、抑郁状态组与非抑郁状态组在积极、消极应对方式上均存在显著性差异;SAS、SDS得分与积极应对方式呈显著负相关,与消极应对方式呈显著正相关。结论在新冠肺炎疫情缓役阶段,部分护理人员处于焦虑、抑郁状态,其消极应对方式对心理状态有一定影响,需要采取有效的应对策略来缓解负性情绪。

关键词：新型冠状病毒肺炎护理人员焦虑抑郁应对方式

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煤矿采空区岩土工程勘察数据库设计与应用

矿业工程研究 2020年第3期35卷 65-72页

作者：韦罗沁浩赵伏军刘朝跃林剑湖南科技大学资源环境与安全工程学院湖南湘潭411201 贵州省交通规划勘察设计研究院股份有限公司贵州贵阳500110 湖南科技大学计算机科学与工程学院湖南湘潭411201

采空区岩土勘察信息数字化是矿山勘察工作智能化的重要环节之一,设计一个满足日常勘察工作各环节需求及利于工程勘察评价的数据库对于其信息管理具有重要意义.依据煤矿采空区岩土工程勘察相关的国家规范,分析了数据库设计需求,将煤矿采... 详细信息

采空区岩土勘察信息数字化是矿山勘察工作智能化的重要环节之一,设计一个满足日常勘察工作各环节需求及利于工程勘察评价的数据库对于其信息管理具有重要意义.依据煤矿采空区岩土工程勘察相关的国家规范,分析了数据库设计需求,将煤矿采空区岩土工程勘察涉及的实体划分为勘察目标实体、勘察方法实体和属性实体,建立了勘察目标实体之间的实体-关系(E-R)模型.对勘察方法实体和属性实体进行分类,"勘察"关联实体构建了数据库概念模型.在此基础上,实现了数据库逻辑设计和物理设计,并以此数据库服务于系统功能.

关键词：煤矿采空区岩土工程勘察实体-关系模型数据库设计

Recent advances in the synthesis and applications of furocoumarin derivatives

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Chinese Chemical Letters 2023年第9期34卷 119-133页

作者： chaoyue Chen Zheng-Bin Tang Zhichang liu School of Chemistry and Chemical Engineering Jiangsu University of TechnologyChangzhou 213001China Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province Department of ChemistrySchool of Science and Research Center for Industries of the FutureWestlake Universityand Westlake Institute for Advanced StudyHangzhou 310030China

Furocoumarins are an important class of heterocyclic compounds with a fused tricyclic structure of coumarin and furan *** are commonly found in bioactive natural products and have a diverse range of biological and pharmaceutical properties,including cytotoxicity,photosensitivity,insecticidal,antibacterial,and antifungal activity,among *** elegant linear/angular tricyclic skeleton and superior pharmacological properties,make them ideal for building and developing advanced biological scaffolds for biomedical *** a result,the family of furocoumarins has been the focus of intensive research,and lots of encouraging progress have been achieved in recent *** review summarizes the most recent methods reported for the synthesis of the furocoumarin derivative family,along with their applications in medicinal chemistry covering from 2018 to 2022.

关键词： Furocoumarin Coumarin Furan Synthesis Pharmaceutical activity Applications

Effect of fuel type on the performance of an aircraft fuel tank oxygen-consuming inerting system

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Chinese Journal of Aeronautics 2021年第3期34卷 82-93页

作者： Xiaotian PENG Shiyu FENG chaoyue LI Chen CHEN Weihua liu Key Laboratory of Aircraft Environment Control and Life Support of MIIT College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China

The properties of aviation fuel have a great influence on the performance of oxygenconsuming inerting systems. Based on the establishment of the catalytic inerting process, the flow relationship of each gas component flowing through the catalytic reactor was derived. The mathematical model of the gas concentration in the gas phase of the fuel tank was established based on the mass conservation equation, and the fuel tank model was verified by performing *** results showed that the fuel type exerts a considerably higher influence on the performance of the oxygen-consuming inerting system compared to the corresponding influence on the hollow fiber membrane system, and the relative magnitude of the inerting rates of the four fuel types is RP5 > RP3 > RP6 > JP8. In addition, a higher catalytic efficiency or fuel load rate corresponds to a higher rate of decrease of the oxygen concentration in the gas phase, and the inerting time is inversely proportional to the suction flow rate of the fan. When different fuels are used, the amount of cooling gas and water released from the inerting system are different. Therefore, the influence of fuel type on the system performance should be extensively considered in the future.

关键词： Aviation fuel Catalytic reactions Hollow fiber membrane Inert gas Mathematical model

Measurement of mass diffusion coefficients of O_2 in aviation fuel through digital holographic interferometry

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Chinese Journal of Aeronautics 2019年第5期32卷 1184-1189页

作者： chaoyue LI Weihua liu Xiaotian PENG Lei SHAO Shiyu FENG Key Laboratory of Aircraft Environment Control and Life Support of Ministry of Industry and Information Technology College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics

The experimental apparatus to measure the mass diffusion coefficients of O2 in aviation fuel was constructed based on the digital holographic interferometry method. The theory of mass diffusion coefficient and interference image processing were introduced in detail. The accuracy of the experiment was verified by measuring the mass diffusion coefficient of 0.33 mol/L KCl in aqueous solution at 298.15 K. The mass diffusion coefficients of O_2 in RP3 and RP5 aviation fuels were measured at temperature from 278.15 K to 333.15 K, and the Arrhenius equation was employed to fit the experimental data. In terms of the Stokes-Einstein equation, the viscosities of these two aviation fuels were tested to estimate the correlation among mass diffusion coefficient, viscosity and temperature. A uniform polynomial calculation correlation was proposed to predict the mass diffusion coefficients of O_2 in both RP3 and RP5 aviation fuels, and its accuracy is considerably higher than that of the Stokes-Einstein equation.

关键词： Aviation fuel Diffusion coefficients Digital holographic interferometry Oxygen Viscosity

ICU护士对患者实施身体约束替代措施的现况调查

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上海护理 2022年第10期22卷 35-39页

作者：王海青刘超越杨富方芳台瑞复旦大学附属华山医院上海200040 上海交通大学附属第一人民医院上海200080 苏州大学护理学院江苏苏州215006 上海交通大学护理学院上海200025

目的了解ICU护士对患者实施身体约束替代措施的现状,为优化ICU患者身体约束管理提供参考。方法采用自行设计的“ICU护士对患者实施身体约束替代措施现状调查表”对上海市某三级甲等综合医院的228名ICU护士进行调查。结果有48.2%的被... 详细信息

目的了解ICU护士对患者实施身体约束替代措施的现状,为优化ICU患者身体约束管理提供参考。方法采用自行设计的“ICU护士对患者实施身体约束替代措施现状调查表”对上海市某三级甲等综合医院的228名ICU护士进行调查。结果有48.2%的被调查护士在临床实践中对患者实施过身体约束替代措施,实施较多的是治疗设施管理(91.7%)、管道管理(90.4%)及环境控制(82.0%),且相关措施多用于烦躁或具攻击性的患者,及意识模糊、定向力障碍、单纯烦躁的患者(>50%)。74.1%的护士认为约束替代措施的选择时机是对患者实施身体约束后。结论 ICU护士对患者实施身体约束以生理因素身体约束替代措施为主,且在约束前实施身体约束替代措施的水平偏低,实施约束替代措施的整体意识有待提高。护理管理者应关注并加强ICU护士相关知识的培训,促进患者身体约束替代措施的实施,进而优化ICU患者安全管理,提升患者舒适度和满意度。

关键词： ICU 护士患者身体约束约束替代约束决策轮护理安全

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Experimental comparison between aircraft fuel tank inerting processes using NEA and MIG

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Chinese Journal of Aeronautics 2018年第7期31卷 1515-1524页

作者： Lei SHAO Weihua liu chaoyue LI Shiyu FENG Chenchen WANG Jun PAN Key Laboratory of Aircraft Environment Control and Life Support of MIIT Nanjing University of Aeronautics and Astronautics Nanjing 210016 China College of Aeronautics Chongqing Jiaotong University Chongqing 400074 China Jiangsu Province Key Laboratory of Aerospace Power System Nanjing Engineering Institute of Aircraft Systems Nanjing 210016 China

Fuel tank inerting technologies are able to reduce the fire risk by injection of inert gas into the ullage or fuel, the former called ullage washing and the latter fuel scrubbing. The Green On-Board Inert Gas Generation System（GOBIGGS） is a novel technology based on flameless catalytic combustion, and owning to its simple structure and high inerting efficiency, it has received a lot of attentions. The inert gas in the GOBIGGS is mainly comprised of CO2, N2, and O2（hereinafter, Mixed Inert Gas（MIG））, while that in the On-Board Inert Gas Generation System（OBIGGS）, which is one of the most widely used fuel tank inerting technologies, is NitrogenEnriched Air（NEA）. The solubility of CO2 is nearly 20 times higher than that of N2 in jet fuels,so the inerting capability and performance are definitely disparate if the inert gas is selected as NEA or MIG. An inerting test bench was constructed to compare the inerting capabilities between NEA and MIG. Experimental results reveal that, if ullage washing is adopted, the variations of oxygen concentrations on the ullage and in the fuel are nearly identical no matter the inert gas is NEA or MIG. However, the ullage and dissolved oxygen concentrations of MIG scrubbing are always higher than those of NEA scrubbing.

关键词： Dissolved oxygen Experiment Fuel tanks Inert gases Mixed Inert Gas(MIG) Nitrogen-Enriched Air(NEA) Oxygen