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Association discovery and outlier detection of air pollution emissions from industrial enterprises driven by big data

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Data Intelligence 2023年第2期5卷 438-456页

作者： Zhen Peng yunxiao zhang Yunchong Wang Tianle Tang China University of Geosciences Beijing School of Economics and ManagementBeijing 100038China Beijing Institute of Petrochemical Technology School of Economics and ManagementBeijing 102617China

Air pollution is a major issue related to national economy and people's *** present,the researches on air pollution mostly focus on the pollutant emissions in a specific industry or region as a whole,and is a lack of attention to enterprise pollutant emissions from the micro *** by the amount and time granularity of data from enterprises,enterprise pollutant emissions are stll *** by big data of air pollution emissions of industrial enterprises monitored in Beijing-Tianjin-Hebei,the data mining of enterprises pollution emissions is carried out in the paper,including the association analysis between different features based on grey association,the association mining between different data based on association rule and the outlier detection based on *** results show that:(1)The industries affecting NOx and SO2 mainly are electric power,heat production and supply industry,metal smelting and processing industries in Beijing-Tianjin-Hebei;(2)These districts nearby Hengshui and Shijiazhuang city in Hebei province form strong association rules;(3)The industrial enterprises in Beijing-Tianjin-Hebei are divided into six clusters,of which three categories belong to outliers with excessive emissions of total vOCs,PM and NH3 respectively.

关键词： Air Pollution Emissions of Enterprises Outlier detection based on clustering Association Rule Mining Grey Association Analysis Big data

Direct Asymmetric Aldol Reaction Co-catalyzed by Amphiphilic Prolinamide Phenol and Lewis Acidic Metal on Water

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Chinese Journal of Chemistry 2013年第2期31卷 247-255页

作者： Tao zhang yunxiao zhang Zaichun Li Zhongtai Song Hao Liu Jingchao Tao College of Chemistry and Molecular Engineering Zhengzhou University 75 Daxue Road Zhengzhou Henan 450052 China

An approach based on combinations of various water compatible Lewis acids and lipophilic group containing amphiphilic prolinamide co-catalysts has been evaluated for the direct asymmetric Aldol reaction. From the broad screening of chloride salts from alkali metal to transition metal, LiC1, ZnCI2 and SnCI2 lead to the highest stereoselectivities. The optimized catalytic conditions （10 mol% prolinamide with 10 mol% MC12 or 20 mol% LiC1 at room temperature on water） gave anti-products with improved enantioselectivities （up to 99% ee） compared to the moderately stereoselective procedure based on prolinamide activation only.

关键词： Aldol reaction amphiphilic prolinamide Lewis acidic metal Co-cayalyst asymmetric catalysis

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电子玻璃生产中节瘤缺陷的分析与对策

中国建材科技 2024年第S1期33卷 82-83页

作者：张云晓刘明杨记龙青岛融合光电科技有限公司山东青岛266000

本文从节瘤缺陷产生机理和其宏观与微观形态入手,分析导致节瘤缺陷产生的因素。结合实际生产中出现的情况以及进行解决措施进行综合分析,对降低电子玻璃节瘤缺陷,提高电子玻璃品质具有指导意义。

关键词：电子玻璃节瘤分析对策

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GC-MS法测定奶茶中18项塑化剂

山东化工 2024年第3期53卷 158-160页

作者：李俏张晓娟张云霄张子臣魏雨芬方圆标志检验检测(山东)有限公司山东济南250100

建立奶茶中测定18项塑化剂的GC-MS分析方法。样品使用正己烷直接提取法进行提取,GC-MS SIM模式进行扫描,外标法定量。17种邻苯二甲酸酯标准溶液质量浓度在10~400μg/L,邻苯二甲酸二异壬酯标准溶液质量浓度在500~5000μg/L线性范围内线... 详细信息

建立奶茶中测定18项塑化剂的GC-MS分析方法。样品使用正己烷直接提取法进行提取,GC-MS SIM模式进行扫描,外标法定量。17种邻苯二甲酸酯标准溶液质量浓度在10~400μg/L,邻苯二甲酸二异壬酯标准溶液质量浓度在500~5000μg/L线性范围内线性关系良好,相关系数(r)均大于0.996。17种邻苯二甲酸酯含量为0.1,0.5,1.0 mg/kg,邻苯二甲酸二异壬酯含量为0.5,2.0,3.0 mg/kg添加水平范围时,奶茶中18项邻苯二甲酸酯的回收率在86.7%~107.8%,相对标准偏差在0.03%~1.79%(n=6)。该方法前处理简单,检测数据准确,可用于大批量奶茶中邻苯二甲酸酯类的检测。

关键词：气相色谱质谱法奶茶塑化剂

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Electrical treeing behaviors in silicone rubber under an impulse voltage considering high temperature

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Plasma Science and Technology 2018年第5期20卷 84-91页

作者： yunxiao zhang Yuanxiang ZHOU Ling zhang Zhen LIN Jie LIU Zhongliu ZHOU The State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084People＇s Republic of China State Key Laboratory of Electrical Insulation and Power Equipment Xi＇an Jiaotong UniversityXi＇an 710049People＇s Republic of China School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001People＇s Republic of China

In this paper,work was conducted to reveal electrical tree behaviors（initiation and propagation）of silicone rubber（SIR） under an impulse voltage with high *** frequencies ranging from 10 Hz to 1 k Hz were applied and the temperature was controlled between 30 °C and 90 °*** results show that tree initiation voltage decreases with increasing pulse frequency,and the descending amplitude is different in different frequency *** the pulse frequency increases,more frequent partial discharges occur in the channel,increasing the tree growth rate and the final shape *** for temperature,the initiation voltage decreases and the tree shape becomes denser as the temperature gets *** on differential scanning calorimetry results,we believe that partial segment relaxation of SIR at high temperature leads to a decrease in the initiation ***,the tree growth rate decreases with increasing *** deposition in the channel under high temperature was observed under microscope and proven by Raman *** tree growth models considering tree channel characteristics are *** is believed that increasing the conductivity in the tree channel restrains the partial discharge,holding back the tree growth at high temperature.

关键词： silicone rubber electrical tree impulse voltage temperature frequency growth rate

Highly transparent and super-wettable nanocoatings hybridized with isocyanate-silane modified surfactant for multifunctional applications

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Nano Materials Science 2022年第2期4卷 151-168页

作者： Man Kwan Law Ying Zhao Weibin zhang Rui Wang Mingcheng Shi yunxiao zhang Shusheng Chen Jinglei Yang Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayHong Kong SARChina

Highly transparent and super-wettable nanocoatings for multifunctional applications with outstanding physical properties are in high ***,such nanocoatings resistant to water invasion and Ultraviolet(UV)weathering remain a significant *** this work,physically durable coatings based on inorganic nanoparticles(NPs)and an organic segment(isocyanate-silane modified surfactant)have been synthesized via a sol-gel *** is noteworthy the isocyanate-silane with-NH-C=O-functional group creates a strong bonding between the highly hydrophilic surfactant and the inorganic *** in-house synthesized organic segment can render the coating long-lasting wetting properties and resist to be washed away by water,while the inorganic NPs can form sturdy covalent bonds with the nano-scale hierarchical structure on the glazing substrate to improve the *** nanocoating demonstrates high transparency with superwetting property(water contact angle,WCA=4.4±0.3°),effective de-frosting *** invasion or UV accelerated weathering tests do not significantly affect the self-cleaning performance of *** properties,including coating adhesion,hardness,Young's modulus,and abrasion resistance are systematically ***,this clear coating shows prominent infrared shielding property attributed to Antimony-doped tin oxide(Sb-doped SnO_(2))*** developed nanocoating process is easy to scale up for larger areas that require multipurpose self-cleaning functions.

关键词： Nanocoating Sol-gel approach Multifunctionality High transparency Superwetting Durability

Geological Characteristics of Shale Gas in Different Strata of Marine Facies in South China

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Journal of Earth Science 2021年第4期32卷 725-741页

作者： Yufang Wang Gangyi Zhai Guoheng Liu Wanzhong Shi Yongchao Lu Juan Li yunxiao zhang Oil and Gas Survey China Geological SurveyBeijing 100083China Key Laboratory of Unconventional Oil and Gas Geology China Geological SurveyBeijing 100029China School of Earth Resources China University of GeosciencesWuhan 430074China

In the Middle and Upper Yangtze region of South China,there are well developed sets of marine shale *** only Wufeng Longmaxi shale gas has been developed in scale,while the Sinian and Cambrian shale gas are still under *** various shale strata show different characteristics in lithological features,such as lithofacies types and reservoir physical properties,which are due to the influence of tectonic pattern,sedimentary environment,and diagenesis caused by tectonic *** will affect the later fracturing technology and fracturing *** shale reservoirs of Sinian doushantuo,Cambrian Niutitang,Upper Ordovician Wufeng,and the Lower Silurian Longmaxi Formation shale were evaluated and compared with each other with respect to their sedimentary environments,lithofacies,minerals compositions,and micro pore *** reservoir characteristics of the shale and the main control factors of shale gas enrichment were summarized in this study.

关键词： shale gas marine shale Doushantuo Formation Niutitang Formation Wufeng-Longmaxi Formation reservoir characteristics comparison

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光子晶体结构生色真丝织物的制备及应用研究

丝绸 2024年第5期61卷 32-39页

作者：向娇娇马万彬金梦婷张耘箫周岚邵建中刘国金柴丽琴浙江理工大学纺织科学与工程学院(国际丝绸学院) 杭州310018 淄博大染坊丝绸集团有限公司山东淄博255300 浙江省现代纺织技术创新中心浙江绍兴312000

为实现真丝织物的结构生色,文章分别利用真空辅助过滤法和手绘法在白色真丝织物上构筑光子晶体结构。进一步探究真空辅助过滤法中微球组装液体积浓度对结构色的影响规律,分析微球在真丝织物上形成光子晶体运动机制,讨论真丝织物上光子... 详细信息

为实现真丝织物的结构生色,文章分别利用真空辅助过滤法和手绘法在白色真丝织物上构筑光子晶体结构。进一步探究真空辅助过滤法中微球组装液体积浓度对结构色的影响规律,分析微球在真丝织物上形成光子晶体运动机制,讨论真丝织物上光子晶体结构色的虹彩效应,并探究手绘法在真丝织物光子晶体结构生色中的应用效果。结果表明:真空辅助过滤法中聚(苯乙烯-甲基丙烯酸),即P(St-MAA)微球组装液的体积浓度为2.4 L/m^(2)时,真丝织物的两面能同时获得光子晶体结构色,此时正反面结构色的反射率峰值在18%左右;在真空辅助过滤法中,P(St-MAA)微球在真丝织物上形成光子晶体结构的过程遵循“先反后正”堆积原则,即织物反面先形成光子晶体,随后微球进一步透过织物堆积在正面。此外,该光子晶体结构生色真丝织物的虹彩效应不明显,与常规染料或颜料着色效果接近;手绘法可以获得图案化的光子晶体生色结构,较适合于个性化加工。该研究为光子晶体结构生色在真丝织物着色中的应用提供参考。

关键词：真丝织物光子晶体结构生色真空辅助过滤法手绘法

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Decorating rare-earth fluoride upconversion nanoparticles on AuNRs@Ag core-shell structure for NIR light-mediated photothermal therapy and bioimaging

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Journal of Rare Earths 2022年第2期40卷 193-200,I0001页

作者： Jingzhi Dou Bei Chen Guixia Liu Xiangting Dong Wensheng Yu Jinxian Wang yunxiao zhang zhanguo Li Jiang Zhu Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province Changchun University of Science and TechnologyChangchun 130022China Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education School of Physics and TechnologyWuhan UniversityWuhan 430072China Tianjin Jinhang Technical Physics Institute Tianjin 300070China School of Optoelectronic Engineering Changchun University of Science and TechnologyChangchun 130022China School of Foreign Languages Changchun University of Science and TechnologyChangchun 130022China

Photothermal therapy(PTT)has presented its inherent application value in cancer ***,single-functional photothermal materials cannot meet the precise diagnosis and treatment of cance *** re,it is important to design a nanocomposite that has both high therapeutic efficiency and multimodal imaging *** our work,a new nanostructure of gold nanorods(AuNRs)with silver shells decorated by BaGdF5:Yb^(3+),Er^(3+)nanoparticle was synthesized by a simple *** biostability of AuNRs is increased by coating with silver shells,and the AuNR@Ag nanoparticles can be used as excellent surface enhanced Raman scattering(SERS)***,the modification of BaGdF5:Yb^(3+),Er^(3+)nanoparticles provides the possibility of real-time optical imaging of the tumor *** the irradiation of NIR laser,the AuNR@Ag/BaGdF5:Yb^(3+),Er^(3+)nanocomposites(NCs)have strong upconversion emission and excellent photothermal conversion ***,the NCs show low cytotoxicity and good biocompatibility in MTT cytotoxicity ***,the NCs are also exceptional contrast agents for CT *** in vitro photothermal therapy test,NCs show excellent killing efficiency on tumor ***,the multifaceted research of AuNR@Ag/BaGdF5:Yb^(3+),Er^(3+)multifunctional nanomaterials provides a break for high-efficiency tumor photothermal therapy and multimodal imaging.

关键词： Multifunctional nanocomposites Photothermal therapy Multimodal imaging Rare earths