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Journal of Beijing Institute of Technology 2022年第4期31卷 371-381页

作者： Pan zhang Wenkai Hu xiangxiang zhang Jianqi An School of Automation China University of GeosciencesWuhan 430074China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan 430074China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of EducationWuhan 430074China

Modern industrial systems are usually in large scale,consisting of massive components and variables that form a complex system *** to the interconnections among devices,a fault may occur and propagate to exert widespread influences and lead to a variety of *** the root causes of alarms is beneficial to the decision supports in making corrective alarm *** data-driven methods for alarm root cause analysis detect causal relations among alarms mainly based on historical alarm event *** improve the accuracy,this paper proposes a causal fusion inference method for industrial alarm root cause analysis based on process topology and alarm events.A Granger causality inference method considering process topology is exploited to find out the causal relations among *** topological nodes are used as the inputs of the model,and the alarm causal adjacency matrix between alarm variables is obtained by calculating the likelihood of the topological Hawkes *** root cause is then obtained from the directed acyclic graph(DAG)among alarm *** effectiveness of the proposed method is verified by simulations based on both a numerical example and the Tennessee Eastman process(TEP)model.

关键词： roots cause analysis causality inference process topology alarm events

Effect of the layer orientation on mechanics and energy evolution characteristics of shales under uniaxial loading

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International Journal of Mining Science and Technology 2016年第5期26卷 857-862页

作者： Hou Peng Gao Feng Yang Yugui zhang xiangxiang zhang Zhizhen State Key Laboratory for Geomechanics ＆ Deep Underground Engineering China University of Mining ＆ Technology Xuzhou 221116 China School of Mechanics ＆ Civil Engineering China University of Mining ＆ Technology Xuzhou 221116 China

The uniaxial compression tests were conducted on the cylindrical shale specimens with bedding plane inclined at 0° and 90° to the axial loading direction, respectively. Effect of the bedding orientation on the mechanical property and energy evolution characteristics of shales was revealed. The failure mechanisms of the specimens with layers in 0° orientation showed splitting failure along weak bedding, while the specimens with layers in 90° orientation were failed by shearing sliding. The values of compressive strength, elastic modulus and shear modulus of samples at 0° were higher than those of samples at 90°and there was little difference of Poisson's ratio between samples at 0° and 90°. The analysis of the stress–strain energy and acoustic emission(AE) energy indicated that the growth rate of absorbed energy density and elastic energy density at 0° was significantly faster than that at 90°, hence their final values at 0°were relatively larger than the latter. Moreover, higher energy release was observed for specimens at 0°.The energy release and rapid growth of energy dissipation also appeared more early at 0°. The stress ratio63% was a critical point of energy distribution at which differences started to arise between samples at 0°and 90°. These results indicated that the failure of shale at 0° was more violent and devastative than the failure of shale at 90°.

关键词： Shale Layer orientation Energy evolutio Failure mechanism Uniaxial compression AE energy

Light-Harvesting Artificial Cells for the Generation of ATP and NADPH

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Chinese Journal of Chemistry 2023年第1期41卷 57-63页

作者： Ziwei Su xiangxiang zhang Weichen Wang Mingdong Dong Xiaojun Han State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical EngineeringHarbin Institute of Technology92 West Da-Zhi StreetHarbinHeilongjiang 150001China Interdisciplinary Nanoscience Center(iNANO) Aarhus UniversityAarhus DK-8000Denmark

The bottom-up construction of self-powered artificial cells is significant to understand the energy supply and metabolism of nature ***,we demonstrate an efficient manner to build thylakoid-containing artificial cells,which continuously convert light energy into chemical energy to supply adenosine 5'-triphosphate(ATP)under light *** production of ATP supplies energy to promote the biological enzyme cascade reactions,where glucose is transformed into glucose 6-phosphate(G6P)under the catalysis of hexokinase(HK).G6P was further converted to gluconolactone 6-phosphate(PG)in the presence of 6-phosphate dehydrogenase(G6PDH),meanwhile NADP^(+) was converted to nicotinamide adenine dinucleotide phosphate(NADPH).The self-powered artificial cells were demonstrated to generate ATP and NADPH successively,which provided a way for building more complicated artificial cells.

关键词： Artificial cells Thylakoids Metabolism Enzymes Vesicles Light harvesting ATPNADPH GUVs

Pattern Matching of Industrial Alarm Floods Using Word Embedding and Dynamic Time Warping

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IEEE/CAA Journal of Automatica Sinica 2023年第4期10卷 1096-1098页

作者： Wenkai Hu xiangxiang zhang Jiandong Wang Guang Yang Yuxin Cai School of Automation China University of GeosciencesWuhan 430074Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex SystemsWuhan 430074 Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of EducationWuhan 430074China College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266590China

Dear Editor,This letter proposes a new pattern matching method based on word embedding and dynamic time warping(DTW)to identify groups of similar alarm ***,alarm messages are transformed into numeric values that represent alarms and also reflect the relationships between alarm ***,similarities between numerically encoded alarm flood sequences are calculated by DTW and groups of similar floods are identified via *** effectiveness of the proposed method is demonstrated by a case study with alarm&event data obtained from a public industrial simulation model.

关键词： Word Alarm DTW

A dual-regulation strategy of B/N codoped CNT-encapsulated Ni nanoparticles as a catalytic host and separator coating promises high-performance Li-S batteries

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Science China(Technological Sciences) 2022年第7期65卷 1567-1577页

作者： XIONG DongGen XU Ling XU Jian zhang xiangxiang LI Jia XU YuQing zhang Ze YU Ji YANG ZhenYu Key Laboratory of Jiangxi Province for Environment and Energy Catalysis College of ChemistryNanchang UniversityNanchang 330031China Department of Physics Nanchang UniversityNanchang 330031China

A dual-regulation strategy of adopting B/N codoped carbon nanotube-encapsulated nickel nanoparticles(Ni@BNCNT) as a sulfur host and separator coating is proposed for high-performance Li-S batteries. On the cathode side, the 3D conductive network structure of Ni@BNCNT is favorable for high sulfur utilization, and the collaboration between polar metal Ni nanoparticles(NPs) and doped B/N elements facilitates the chemical adsorption of Li polysulfides(Li PSs). In addition, these metal Ni NPs exhibit a satisfactory catalytic effect on the polysulfide conversion. Moreover, using the Ni@BNCNT interlayer can further capture the soluble Li PSs, make them convert quickly, and prevent them from diffusing toward the anode side. The Li-S batteries simultaneously equipped with a S/Ni@BNCNT cathode and Ni@BNCNT interlayer show high reversible capacity and good cycle stability. Additionally, even at a sulfur loading of 3.5 mg cm;and an electrolyte/sulfur ratio of 3 μL mg;, excellent battery performance can be achieved. We believe that this work offers a new strategy based on combining a catalytic host and separator coating to construct high-efficiency Li-S batteries.

关键词： Li-S batteries CNT-encapsulated Ni catalysts dual-regulation strategy catalytic host separator coating

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Evaluation of yield,stability and adaptability of national winter rapeseed regional trials in the upper Yangtze River region in 2017-2018

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Oil Crop Science 2020年第3期5卷 121-128页

作者： Ze’en Yu Lixia Luo Fang zhang Meiyan Hong xiangxiang zhang Ruixing Guo Oil Crops Research Institute Chinese Academy of Agricultural SciencesWuhanChina National Agricultural Technology Extension and Service Center BeijingChina

Rapeseed variety needs to be tested by regional trial in multiple sites for many years before being applied in market in *** of rapeseed were affected by the interaction of sites and *** of regional trials is very important for guiding rapeseed ***(genotype main effects and genotypeenvironment interaction)biplot was used to evaluate yield,stability,adaptability,representativeness and discrimination of national winter rapeseed trials in the upper reaches of Yangtze River in *** showed that the main effects of genotype(G),environment(E)and genotypeenvironment interaction(GE)were significant(P<0.01)for *** them,E accounted for 46.95%total variation on average,G and GE accounted for 19.34%and 33.71%*** varieties were found with high-yield,excellent stability and adaptability,including‘Yiyou 29’,‘Xiwang 920’,‘Liyouza 108’,‘Nanyou 546’,‘Dadi 195’,‘Jiayou 1’,‘Huayouza 28’and‘Yuhua 2’.Test sites included Nanchong,Mianyang,Wanzhou,Shuangliu and Chengdu in Sichuan Province and Zunyi together with Guiyang in Guizhou Province were selected for their excellent representativeness and *** results would provide theoretical basis for rapeseed breeding.

关键词： National regional trial GGE biplot High yield Yield stability Adaptability Representativeness Discrimination

Imaging charge carrier transfer in facet-dependent semiconductor photocatalysts by single-particle fluorescence spectroscopy

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Science China Chemistry 2024年

作者： Bei Li xiangxiang zhang Min Lv Baibiao Huang Zhaoke Zheng State Key Laboratory of Crystal Materials Shandong University

Facet-dependent semiconductor photocatalysts exhibit immense potential in solar energy conversion and environmental purification. Variations in composition, morphology, atomic arrangement, and surface defects among different nanomaterials result in significant diversities in photocatalytic activities. Nevertheless, the structural diversity covered by integrity and uniformity is detrimental to highlighting the relationship between material and activity, compromising the logical design and optimization of photocatalysts. Fortunately, the “temporally-spatially” resolved single-particle fluorescence spectroscopy imaging technique paves the way for an in-depth exploration of facet-dependent carrier separation and transfer processes at different sites of single nanoparticle, thus providing a profound understanding of the photocatalytic reaction mechanism. In this review, we briefly introduce the imaging principle of single-particle fluorescence spectroscopy. Subsequently, we focus on the recent advancements in single-particle fluorescence spectroscopy technology to characterize the structural complexity and heterogeneity of facetdependent semiconductor photocatalysts, as well as its application in revealing the interfacial interactions between catalysts and reactants. Finally, we provide outlooks on the development prospects of single-particle fluorescence spectroscopy in the field of photocatalysis.

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Research on Inventory Pledge Financing Pledge Decision under Internet of Things Technology

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Journal of Finance Research 2020年第2期4卷 80-86页

作者： xiangxiang zhang Gengjun Gao Institute of Logistics Science and Engineering Shanghai Maritime UniversityShanghai201306China

Inventory pledge financing not only solves the financing difficulties of small and medium-sized enterprises,but also opens up business channels for *** the random market demand,this article studies the pledge decision-making of perishable pledges in the inventory pledge business,On the basis of considering the supervision of the Internet of Things technology to reduce the loss rate of quality goods,a decision model of the pledge rate of the bank is constructed in the case of not adopting the Internet of things technology and adopting the Internet of things *** pledge rate decision-making model in the two technical situations aims at maximizing the profit at the end of the pledge *** factors in the model such as the pledge rate,end-of-period income,and IoT technology coverage rate are analyzed respectively,and finally the decision-making process is verified through calculation *** have shown that,when Internet of Things technology is not adopted,the income of bank pledge business first increases and then decreases with the growth of pledge *** the adoption of Internet of Things technology,the income of Banks is inversely proportional to the coverage rate of Internet of Things ***,within a certain coverage range,Banks can obtain greater income by using Internet of Things technology to supervise pledges.

关键词： SMEs Inventory pledge financing Pledge rate Internet of Things technology

Clustering face algorithm of Multi-level blocks using high-level feature

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International English Education Research 2017年第5期 59-62页

作者： zhang xiangxiang FANG Zhijun School of Electronic and Electrical Engineering Shanghai University of Engineering Science

The noise data of large-scale messy face picture sets is difficult to remove, and the classification of face images is usually using clustering, the number of clusters is unknown and the estimation of the number is a complicated problem. In this paper, a new algorithm based on the fusion which is face images with depth feature and multi-level blocks clustering is proposed. We cluster face images which is not directly clustering, but the pictures are divided into multiple levels and using feature fusion of many pictures by selecting proper multiple thresholds. Experimental results demonstrate our cluster face algorithm performs well in MS-Celeb-1 Mtl~, CASlA-WebFace and so on.

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基于液体透镜的显微镜自动调焦技术

光电工程 2015年第10期42卷 37-42页

作者：张祥翔徕卡显微系统(上海)有限公司上海201206

本文针对生物显微镜对于自动调焦的要求,通过光学仿真和实验验证了液体镜头技术在生物医学显微镜自动调焦方面的应用。首先基于液体镜头的分类介绍了市场上具有代表性的Varioptics和Optotune lens公司的液体镜头产品的原理和特点,通过... 详细信息

本文针对生物显微镜对于自动调焦的要求,通过光学仿真和实验验证了液体镜头技术在生物医学显微镜自动调焦方面的应用。首先基于液体镜头的分类介绍了市场上具有代表性的Varioptics和Optotune lens公司的液体镜头产品的原理和特点,通过对比这两种液体透镜的特点,选择Optotune公司的液体镜头作为显微镜自动调焦装置。其次,本文根据液体镜头的光学参数,将其集成到现有的显微镜系统中,使用Zemax软件模拟了系统的变焦过程,并仿真了系统的光学性能。最后对Optotune液体镜头在生物显微镜上的调焦功能进行了实验验证,并获取了系统在不同焦距的图像。实验结果表明,液体透镜可以使系统的景深扩展1 mm以上,并且保持了良好的成像质量。基于液体镜头技术的显微镜自动调焦技术具有结构紧凑,低成本,快速调焦的特点,同时也能满足较高的成像质量。

关键词：液体透镜显微系统自动调焦生物医学成像