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基于注意力机制的CNN-ILSTM地铁站PM_(2.5)预测建模

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中国测试 2024年第7期50卷 53-62页

作者：朱菊香谷卫罗丹悦潘斐张赵良无锡学院轨道交通江苏无锡214105 南京信息工程大学自动化学院江苏南京210000

为提高PM_(2.5)的预测精度,提出一种基于卷积神经网络(CNN)、改进长短期记忆网络(ILSTM)和注意力机制(attention)组合的预测模型。ILSTM删除LSTM中的输出门,改进其输入门和遗忘门,并引入转换信息模块(CIM),以防止学习过程中的过饱和。... 详细信息

为提高PM_(2.5)的预测精度,提出一种基于卷积神经网络(CNN)、改进长短期记忆网络(ILSTM)和注意力机制(attention)组合的预测模型。ILSTM删除LSTM中的输出门,改进其输入门和遗忘门,并引入转换信息模块(CIM),以防止学习过程中的过饱和。该模型将一维卷积神经网络的特征提取和改进长短期记忆网络学习序列依赖性的能力相结合,得到过去不同时间特征状态对未来PM_(2.5)浓度的影响,可以有效模拟PM_(2.5)在时间和空间上的依赖性,并通过注意力机制自动权衡过去的特征状态,进一步提升PM_(2.5)预测的准确度。实验结果表明:CNN-ILSTM-attention模型的拟合度达到98.5%,与LSTM模型、CNN-LSTM模型和CNN-ILSTM模型相比,分别提高26%、9.2%和6.2%,具有较高的预测精度和应用价值。

关键词：卷积神经网络改进长短期记忆网络 PM_(2.5)浓度预测注意力机制

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Different mechanisms between reactions of soot with gaseous and adsorbed NO_2

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Chinese Science Bulletin 2014年第26期59卷 4003-4007页

作者： Yexin zhang Shaojie Chen Qian Li zhaoliang zhang Jian zhang School of Chemistry and Chemical Engineering University of Jinan Institute for New Energy Technologies Ningbo Institute of Materials Technology and EngineeringChinese Academy of Science

The reactions of soot with gaseous and adsorbed NO2were tested over the K/MgAlO *** the reaction intermediates were identified by combination of in situ IR characterization and first-principles calculation,the different mechanisms were *** was found that the reactivity of adsorbed NO2is lower than that of the gas *** adsorbed NO2reacts with soot in the form of nitrates,leading to the observation of two IR bands at 2,234and 2,110 cm-1,which are ascribed to the vibration frequencies of cyanates on K sites and cyanides on the MgAlO support,*** the contrary,the isocyanates were confirmed as intermediates in the reaction of soot with gaseous *** the adsorbed NO2species(i.e.,nitrates)are restricted by the electrostatic field of K+,the cyanates are produced and readily cracked into cyanides,which transfer to the MgAlO *** gaseous NO2favours the production of isocyanates due to their higher *** weaker reactivity of adsorbed NO2at lower temperatures can be attributed to the restriction of the electrostatic field of K+.

关键词：反应中间体 NO2 吸附气态机制烟尘第一原理计算异氰酸酯

基于VMD-DBO-LSTM的空气质量预测

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国外电子测量技术 2024年第3期43卷 58-66页

作者：张诗云朱菊香张涛孙君峰张赵良南京信息工程大学自动化学院南京210000 无锡学院轨道交通学院无锡214105

针对传统空气质量预测模型收敛速度慢,精度低的问题,提出一种基于变分模态分解(variational mode decomposition,VMD)和蜣螂优化算法(dung beetle optimizer,DBO)优化长短期记忆网络(long short term memory,LSTM)的预测模型。首先,针对... 详细信息

针对传统空气质量预测模型收敛速度慢,精度低的问题,提出一种基于变分模态分解(variational mode decomposition,VMD)和蜣螂优化算法(dung beetle optimizer,DBO)优化长短期记忆网络(long short term memory,LSTM)的预测模型。首先,针对AQI原始数据具有大量噪声的问题,使用VMD方法对非平稳信号进行模态分解以降低噪声对预测结果的影响从而获得多个不同特征的模态分量;其次,针对LSTM靠人工经验调参存在一定局限性,利用DBO算法对LSTM模型参数进行优化;最后,对分解后的各个子序列使用LSTM模型预测,将各个子序列进行叠加得到最后的预测结果。实验结果表明,VMD对非平稳数据的分解有助于提高预测精度,VMD-DBO-LSTM模型的性能较其他模型均有不同程度的提高,该模型预测的均方根误差为4.73μg/m^(3),平均绝对误差为3.61μg/m^(3),拟合度达到了97.8%。

关键词：空气质量预测变分模态分解蜣螂优化算法长短期记忆网络

From nanoparticles to single atoms for Pt/CeO2:Synthetic strategies,characterizations and applications

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Journal of Rare Earths 2020年第8期38卷 850-862,I0002页

作者： Ying Xin Nana zhang Yanan Lv Jin Wang Qian Li zhaoliang zhang Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China

Pt/CeO2 catalysts with unitary Pt species,nanoparticles,clusters or single atoms,often exhibit excellent activity and unique selectivity in many catalytic reactions benefiting from their small size,abundant unsaturated active sites,and unique electro nic *** recent years,a tre mendous number of related articles have provided great inspiration to future research and development of Pt/CeO2 *** this review,the state-of-the-art evolution of Pt nanoparticles to Pt single atoms on CeO2 is reviewed with the emphasis on synthetic strategies,advanced characterization techniques(allowing one to clarify the single atoms from clusters),the catalytic applications and mechanisms from the viewpoint of theoretical ***,the critical outlooks and the challenges faced in developing the single-atom Pt/CeO2 catalysts are highlighted.

关键词： Pt/CeO2 Single atoms Cluster Synthetic strategy Characterization Application

基于二次分解和改进沙猫群优化算法的空气质量预测

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国外电子测量技术 2024年第5期43卷 190-200页

作者：朱菊香张诗云张涛孙君峰张赵良无锡学院轨道交通学院无锡214105 南京信息工程大学自动化学院南京210000 江苏省工业环境危害要素监测与评估工程研究中心无锡214105

准确预测空气质量对人们的日常生活具有重要意义,提出了一种二次分解和改进沙猫群算法(improved sand cat swarm optimization,ISCSO)优化长短期记忆网络(long short-term memory,LSTM)相结合的预测模型。首先,利用完全自适应噪声集合... 详细信息

准确预测空气质量对人们的日常生活具有重要意义,提出了一种二次分解和改进沙猫群算法(improved sand cat swarm optimization,ISCSO)优化长短期记忆网络(long short-term memory,LSTM)相结合的预测模型。首先,利用完全自适应噪声集合经验模态分解(complete ensemble empirical mode decomposition with adaptive noise,CEEMDAN)算法将PM 2.5数据分解为多个子序列,对预测效果不满意的重构序列使用变分模态分解(variational mode decomposition,VMD)方法进行二次分解;其次,引入Cubic混沌、螺旋搜索策略和麻雀警戒机制改进沙猫群算法,有效提高了算法的全局搜索性能和收敛速度;最后,采用改进的沙猫群算法对LSTM模型参数进行优化,将各个子序列导入ISCSO-LSTM模型预测并叠加得到最终预测结果。实验结果表明,CEEMDAN-VMD-ISCSO-LSTM组合模型具有较低的预测误差,相比CEEMDAN-VMD-LSTM和CEEMDAN-VMD-SCSO-LSTM模型,该模型在均方根误差方面分别降低了2.21和1.04μg/m^(3),在拟合度方面分别提高了4.9%和2.1%。

关键词：空气质量预测二次分解改进沙猫群算法长短期记忆网络

Determination of 4-tert-octylphenol in surface water samples of Jinan in China by solid phase extraction coupled with GC-MS

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Journal of Environmental Sciences 2013年第8期25卷 1712-1717页

作者： Xueyu Yang Mingren Liu Zhongpeng Wang Qian Li zhaoliang zhang School of Chemistry and Chemical Engineering University of Jinan School of Resources and Environment University of Jinan

Octylphenols, considered as xenoestrogens, mainly exist as 4-tert-octylphenol （OP） in aquatic environments. The high stability and accumulation of OP in aquatic systems have caused endocrine disruption. The OP in surface water in Jinan, China was analyzed by gas chromatography-mass spectrometry （GC-MS） coupled with solid phase extraction （SPE）. Water samples were extracted by SPE on a cartridge system containing C-18 as sorbent. To increase sensitivity and selectivity, OP was derivatized to 4-tert-octyl-phenoxy silane. With the use of phenanthrene-d10 as internal standard, the detection limit based on signal-to-noise ratio （S/N = 3） was 0.06 ng/mL. The average recovery was from 84.67% to 109.7%. The precision of the method given as the relative standard deviations （RSD） was within the range 6.24%-12.96%. In the target water samples, the concentrations of OP were as follows： 15.88-71.24 ng/L for Jinxiuchuan Reservoir, 3.850-26.68 ng/L for the city moat, 6.930-41.56 ng/L for Daming Lake, 66.03-474.2 ng/L for Xiaoqing River, 14.66-17.72 ng/L for the Yellow River, and 10.60-26.43 ng/L for Queshan Reservoir. The Xiaoqing River was seriously polluted due to the discharge of wastewater from Jinan. Jinxiuchuan Reservoir had a higher concentration of OP compared with the Yellow River and Queshan Reservoir, which is ascribed to the surrounding human activities. These data are reported for the first time, providing strong support for the control of OP pollution in Jinan.

关键词： GC-MS octylphenol Jinan solid phase extraction derivatization internal standard

Molecular mechanisms underlying phosphate sensing, signaling, and adaptation in plants

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Journal of Integrative Plant Biology 2014年第3期56卷 192-220页

作者： zhaoliang zhang Hong Liao William J.Lucas Department of Plant Biology College of Biological Sciences University of California State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources Root Biology Center South China Agricultural University

As an essential plant macronutrient, the low availability of phosphorus （P） in most soils imposes serious limitation on crop production. Plants have evolved complex responsive and adaptive mechanisms for acquisition, remobilization and recycling of phosphate （Pi） to maintain P homeostasis. Spatio-temporal molecular, physiological, and biochemical Pi deficiency responses developed by plants are the consequence of local and systemic sensing and signaling pathways. Pi deficiency is sensed locally by the root system where hormones serve as important signaling components in terms of developmental reprogramming, leading to changes in root system architecture. Root-to-shoot and shoot-to-root signals, delivered through the xylem and phloem, respectively, involving Pi itself, hormones, miRNAs, mRNAs, and sucrose, serve to coordinate Pi deficiency responses at the whole-plant level. A combination of chromatin remodeling, transcriptional and posttranslational events contribute to globally regulating a wide range of Pi deficiency responses. In this review, recent advances are evaluated in terms of progress toward developing a comprehen- sive understanding of the molecular events underlying control over P homeostasis. Application of this knowledge, in terms of developing crop plants having enhanced attributes for P use efficiency, is discussed from the perspective of agricultural sustainability in the face of diminishing global P supplies.

关键词： Adaptation crop engineering strategies hormone networks local and long-distance sensing phosphate P use efficiency stress responses systemic signaling transcriptional regulation transport systems

Application of Rare Earth Oxides in Diesel Exhaust Purification Catalysts

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Journal of Rare Earths 2004年第Z1期22卷 194-196页

作者： zhang zhaoliang Yu Pengfei Wang Shilong Li Chunfeng Dai Hua College of Chemistry and Chemical Engineering Jinan University Jinan 250022 China Hainan Liuhe Enviromental Protection Catalysts Co. Ltd. Jinpan Industrial Development Zone Haikou 570216 China College of Chemistry and Chemical Engineering Jinan University Jinan 250022 China College of Chemistry and Chemical Engineering Jinan University Jinan 250022 China College of Chemistry and Chemical Engineering Jinan University Jinan 250022 China Hainan Liuhe Enviromental Protection Catalysts Co. Ltd.Jinpan Industrial Development Zone Haikou 570216 China

Diesel oxide catalysts and soot combustion catalysts were reported in this *** former was manufactured in mass last year, and enhanced performance is under development *** later is screened out and further research is under *** best soot combustion catalyst could ignite soot combustion even at 350 ℃, which is within the range of temperatures reached in diesel exhaust, and shows the catalytic combustion velocity nearly one time faster compared with non-catalytic combustion of soot, which is of benefit to rapid regeneration of diesel particulate filter, thus it might be an excellent practicable catalyst.

关键词： diesel oxidation catalyst soot combustion catalyst perovskite rare earths

Plant lncRNAs are enriched in and move systemically through the phloem in response to phosphate deficiency

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Journal of Integrative Plant Biology 2019年第4期61卷 492-508页

作者： zhaoliang zhang Yi Zheng Byung-Kook Ham Shupei zhang zhangjun Fei William J.Lucas State Key Laboratory of Tea Biology and Utilization Anhui Agricultural University Boyce Thompson Institute for Plant Research Cornell University Global Institute for Food Security Department of Biology University of Saskatchewan Department of Plant Biology College of Biological Sciences University of California

In response to phosphate(Pi) deficiency, it has been shown that micro-RNAs(miRNAs) and mRNAs are transported through the phloem for delivery to sink tissues. Growing evidence also indicates that long noncoding RNAs(lncRNAs) are critical regulators of Pi homeostasis in plants. However, whether lncRNAs are present in and move through the phloem, in response to Pi deficiency, remains to be established. Here, using cucumber as a model plant, we show that lncRNAs are enriched in the phloem translocation stream and respond,systemically, to an imposed Pi-stress. A well-known lncRNA, IPS1, the target mimic(TM) of miRNA399,accumulates to a high level in the phloem, but is not responsive to early Pi deficiency. An additional 24 miRNA TMs were also detected in the phloem translocation stream; among them miRNA171 TMs and miR166 TMs were induced in response to an imposed Pi *** studies identified 22 lncRNAs which move systemically into developing leaves and root tips. A CU-rich PTB motif was further identified in these mobile lncRNAs. Our findings revealed that lncRNAs respond to Pi deficiency, non-cell-autonomously, and may act as systemic signaling agents to coordinate early Pi deficiency signaling, at the whole-plant level.

关键词： Plant lncRNAs enriched phloem phosphate deficiency