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SQLS:A Storm-Based Query Language System for Real-Time Stream Data Analysis

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Chinese Journal of Electronics 2016年第6期25卷 1025-1033页

作者： JI Yimu zhang Dianchao SUN Yanfei ZHAO chuanxin HE Jing WANG Ruchuan CHEN Guoliang Computer of Science Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Key Laboratory of Computer Network and Information Integration Southeast University Key Laboratory of Intelligent Perception and Systems for High-Dimensional Information of Ministry of Education Nanjing University of Science and Technology Computer of Telecommunications Nanjing University of Posts and Telecommunications Department of Computer Anhui Normal University Engineering and Science Victoria University

In this work, a Storm-based query language System(SQLS) is proposed for real-time data stream analysis. The system is compatible with Continuous query language(CQL) specification. It supports both continuous queries and one-time queries over streaming data, and meets the requirements of user experience(traditional SQL queries) and Qo S(such as real-time and throughput). In order to better meet the requirement of throughput and enhance the processing efficiency, the load shedding algorithm and cache optimization are employed during the implementation of SQL-like operators. Finally, performance testing of the proposed SQLS has been conducted on standalone Storm platform and Storm clusters. Experimental results show that our system can not only meet the needs of users, but also extend the function of real-time streaming queries processing.

关键词： Continuous query Ad hoc query Storm CQL Real-time query processing

Rock-magnetic properties of Neogene sediments, northern flank of Tianshan Mountains

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Science China Earth Sciences 2007年第4期50卷 544-554页

作者： LI chuanxin GUO ZhaoJie MENG ZiFang LI HaiYan zhang ZhiCheng WU ChaoDong Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education(Peking University)Beijing 100871China Lanzhou Institute of Geology Chinese Academy of SciencesLanzhou 730000China State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesBeijing 100083China

Analyses of rock-magnetic properties of Neogene sediments of the Taxihe section, northern Tianshan Mountains, show that the section can be classified into three categories including lacustrine facies, fluvial facies and alluvial facies, which correspond to the lower, middle and upper of the Taxihe section respectively. The magnetic minerals of the lacustrine facies may be affected by the process of weath- ering, lithogenesis and biolithogenesis besides the source of the sediments. The natural remanence intensities are between 10-3 A/m and 10-2 A/m. The minerals are dominated by magnetite and the high coercive magnetic mineral may be goethite. The magnetic grains are the mixture of PSD+SD or SD+SP. The natural remanence intensities of the strata of fluvial facies are between 10-2 A/m and 10-1 A/m, about ten times that of the lacustrine facies. The magnetic minerals are mainly magnetite and hematite, and the magnetic grains are mainly PSD. The characteristic remanence (ChRM) carriers are magnetites. In the alluvial facies, the natural remanence intensities are mostly less than 1×10-2 A/m. The magnetic minerals of the series are dominated by magnetite and hematite, almost the same as the fluvial facies. But the difference is that most of the stepwise demagnetization can reveal two components and the ChRM carriers are hematites. The magnetic grains are PSD in terms of the hysteresis parameters.

关键词： Northern flank of Tianshan Mountains Neogene magnetic carrier IRM temperature-dependent susceptibility Day plot

Construction of MnS/MoS_(2) heterostructure on two-dimensional MoS_(2) surface to regulate the reaction pathways for high-performance Li-O_(2) batteries

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Journal of Energy Chemistry 2024年第6期93卷 443-452,I0012页

作者： Guoliang zhang Han Yu Xia Li Xiuqi zhang chuanxin Hou Shuhui Sun Yong Du Zhanhu Guo Feng Dang Key Laboratory for Liquid-Solid Structure Evolution and.Processing of Materials(Ministry of Education) Shandong UniversityJinan 250061ShandongChina School of Environmental and Material Engineering Yantai UniversityYantai 264005ShandongChina Institute National de la Recherche Scientifique CentreÉnergie Matériaux et TélécommunicationsVarennesQuébec J31S2Canada State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083HunanChina Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon TyneNE18STUK

The inherent catalytic anisotropy of two-dimensional(2D) materials has limited the enhancement of LiO_(2) batteries(LOBs) performance due to the significantly different adsorption energies on 2D and edge *** the adsorption strength in 2D materials to the reaction intermediates is essential for achieving high-performance ***,a MnS/MoS_(2) heterostructure is designed as a cathode catalyst by adjusting the adsorption behavior at the *** from the toroidal-like discharge products on the MoS_(2) cathode,the MnS/MoS_(2) surface displays an improved adsorption energy to reaction species,thereby promoting the growth of the film-like discharge *** can disturb the layer growth of MoS_(2),in which the stack edge plane features a strong interaction with the intermediates and limits the growth of the discharge *** and theoretical results confirm that the MnS/MoS_(2) heterostructure possesses improved electron transfer kinetics at the interface and plays an important role in the adsorption process for reaction species,which finally affects the morphology of Li_2O_(2),In consequence,the MnS/MoS_(2) heterostructure exhibits a high specific capacity of 11696.0 mA h g^(-1) and good cycle stability over 1800 h with a fixed specific capacity of 600 mA h g^(-1) at current density of100 mA g^(-1) This work provides a novel interfacial engineering strategy to enhance the performance of LOBs by tuning the adsorption properties of 2D materials.

关键词： Li-O_(2)batteries Two-dimensional materials MnS/MoS_(2)heterostructure Edge plane Adsorption behavior

Recent advances in the nanoconfinement of Mg-related hydrogen storage materials:A minor review

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International Journal of Minerals,Metallurgy and Materials 2023年第1期30卷 14-24页

作者： Jingjing zhang Bing zhang Xiubo Xie Cui Ni chuanxin Hou Xueqin Sun Xiaoyang Yang Yuping zhang Hideo Kimura Wei Du School of Environmental and Material Engineering Yantai UniversityYantai 264005China

Hydrogen is an ideal clean energy because of its high calorific value and abundance of ***,storing hydrogen in a compact,inexpensive,and safe manner is the main restriction on the extensive utilization of hydrogen ***(Mg)-based hydrogen storage material is considered a reliable solid hydrogen storage material with the advantages of high hydrogen storage capacity(7.6wt%),good performance,and low ***,the high thermodynamic stability and slow kinetics of Mg-based hydrogen storage materials have to be *** this paper,we will review the recent advances in the nanoconfinement of Mg-related hydrogen storage materials by loading Mg particles on different supporting materials,including carbons,metal-organic frameworks,and other *** are also provided for designing high-performance Mg-based materials using nanoconfinement.

关键词： magnesium-based materials hydrogen storage nanoconfinement carbon materials

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对开设《精细化工》选修课的调查与分析

商丘师范学院学报 1998年第S2期14卷 74-75页

作者：徐茂田赵文献郭保国张传新商丘师专化学系河南商丘476000

对在校生、毕业生及社会上调查的信息进行了分析，论述了在高等师范院校化学系开设《精细化工》选修课的必要性，归纳了开设该课程的益处．

关键词：精细化工选修课程一专多能

In situ formation of multiple catalysts for enhancing the hydrogen storage of MgH_(2) by adding porous Ni_(3)ZnC_(0.7)/Ni loaded carbon nanotubes microspheres

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Journal of Magnesium and Alloys 2024年第3期12卷 1227-1238页

作者： Bing zhang Xiubo Xie Yukun Wang chuanxin Hou Xueqin Sun Yuping zhang Xiaoyang Yang Ronghai Yu Wei Du School of Environmental and Material Engineering Yantai UniversityNo.30 Qingquan RoadYantai 264005China Key Laboratory of Aerospace Materials and Performance(Ministry of Education)School of Materials Science and Engineering Beihang UniversityNo.37 Xueyuan RoadBeijing 100191China

MgH_(2) is considered one of the most promising hydrogen storage materials because of its safety,high efficiency,high hydrogen storage quantity and low cost *** some shortcomings are still existed:high operating temperature and poor hydrogen absorption dynamics,which limit its *** Ni_(3)ZnC_(0.7)/Ni loaded carbon nanotubes microspheres(NZC/Ni@CNT)is prepared by facile filtration and calcination *** the different amount of NZC/Ni@CNT(2.5,5.0 and 7.5 wt%)is added to the MgH_(2) by ball *** the three samples with different amount of NZC/Ni@CNT(2.5,5.0 and 7.5 wt%),the MgH_(2)-5 wt%NZC/Ni@CNT composite exhibits the best hydrogen storage *** testing,the MgH_(2)-5 wt%NZC/Ni@CNT begins to release hydrogen at around 110℃ and hydrogen absorption capacity reaches 2.34 wt%H_(2) at 80℃ within 60 ***,the composite can release about 5.36 wt%H_(2) at 300℃.In addition,hydrogen absorption and desorption activation energies of the MgH_(2)-5 wt%NZC/Ni@CNT composite are reduced to 37.28 and 84.22 KJ/mol H_(2),*** in situ generated Mg_(2)NiH_(4)/Mg_(2)Ni can serve as a"hydrogen pump"that plays the main role in providing more activation sites and hydrogen diffusion channels which promotes H_(2) dissociation during hydrogen absorption *** addition,the evenly dispersed Zn and MgZn2 in Mg and MgH_(2) could provide sites for Mg/MgH_(2) nucleation and hydrogen diffusion *** attempt clearly proved that the bimetallic carbide Ni_(3)ZnC_(0.7) is a effective additive for the hydrogen storage performances modification of MgH_(2),and the facile synthesis of the Ni_(3)ZnC_(0.7)/Ni@CNT can provide directions of better designing high performance carbide catalysts for improving MgH_(2).

关键词： Mg-based hydrogen storage material Ni_(3)ZnC_(0.7)/Ni@CNT particles Ni loaded carbon nanotubes Multiple catalysts.

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基于核电站管道系统防护的沉积问题研究

辽宁石油化工大学学报 2020年第3期40卷 28-34页

作者：赵延鹏吴志锋金硕王皓张传新王富强辽宁红沿河核电有限公司安全质保部辽宁大连116300 哈尔滨工业大学(威海)新能源学院山东威海264209

为了研究高温、高压下核电站内两相流中所含粒子在管道发生沉积的现象,深入探究粒子对管道的冲蚀沉积机制,采用相似原理与近似模化方法,设计并搭建了能够捕捉核电管道系统实际运行中关键参数的实验台。对30 h弯管沉积实验结果进行分析可... 详细信息

为了研究高温、高压下核电站内两相流中所含粒子在管道发生沉积的现象,深入探究粒子对管道的冲蚀沉积机制,采用相似原理与近似模化方法,设计并搭建了能够捕捉核电管道系统实际运行中关键参数的实验台。对30 h弯管沉积实验结果进行分析可知,90°水平弯管的外壁以及内壁为沉积热点区域,外壁轴向角30°~45°区域为沉积量最大区域;Co元素在8 mm×8 mm×3 mm样片上的沉积量达1.98×10^-10 g。研究结果可为核电站辐射剂量预测以及辐射防护提供参考数据。

关键词：核电钴粒子沉积测试辐射防护剂量预测

Janus heterostructure of cobalt and iron oxide as dual-functional electrocatalysts for overall water splitting

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Nano Research 2023年第2期16卷 2245-2251页

作者： Xiaojie Li Huike zhang Xuan Li Qi Hu Chen Deng Xingxing Jiang Hengpan Yang chuanxin He College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060China

In electrocatalytic water splitting,low-cost dual-functional catalysts can not only reduce costs but also avoid cross-contamination of cathode and ***,the orderly aggregation of active sites for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)into a specific catalyst is very *** this study,a Co/Fe_(3)O_(4)Janus heterojunction supported on carbon fiber paper(J-CoFe-CFP)is designed and successfully ***,Co-Fe oxides have preferable OER activity but weak HER ***,in J-CoFe-CFP,due to the intense and special electronic interaction of different substances(Co and Fe3O4)in the Janus heterogeneous interface,a huge number of tidy high-quality HER and OER active sites are uniformly distributed on the interface simultaneously,which endows the catalyst with both excellent HER and OER *** HER,the overpotential@10 mA·cm^(−2)(ηHER)is only 53.9 mV,and the Tafel slope is 43.7 mV·dec^(−1).In OER,theηis 272 mV,and the Tafel slope is 50.2 mV·dec^(−1),much lower than those of RuO_(2)/*** the J-CoFe-CFP||J-CoFe-CFP two-electrode system,the required voltage is only 1.26 V at the beginning and 1.56 V@10 mA·cm^(−2),much lower than those of RuO_(2)/CFP||20%Pt/C/*** work provides a Janus heterojunction pathway for bifunctional water electrolysis catalysts.

关键词： Janus bifunctional electrocatalytic water splitting CoFe

Pyrimidine donor induced built-in electric field between melon chains in crystalline carbon nitride to facilitate excitons dissociation

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Chinese Chemical Letters 2023年第3期34卷 546-552页

作者： Guoqiang zhang Yangsen Xu Guoshuai Liu Yongliang Li chuanxin He Xiangzhong Ren Peixin zhang Hongwei Mi College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China Guangdong Flexible Wearable Energy and Tools Engineering Technology Research Centre Shenzhen University Shenzhen 518060China Research Centre for Information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

The strong intrinsic Coulomb interactions of Frenkel excitons in crystalline carbon nitride(CCN) greatly limits their dissociation into electrons and holes, resulting in unsatisfactory charges separation and photocatalytic efficiency. Herein, we propose a strategy to facilitate excitons dissociation by molecular regulation induced built-in electric field(BIEF). The electron-rich pyrimidine-ring into CCN changes the charge density distribution over heptazine-rings to induce BIEF between melon chains. Such BIEF is sufficient to overcome the considerable exciton binding energy(EBE) and reduce it from 38.4 meV to 16.4 meV,increasing the excitons dissociation efficiency(EDE) from 21.5% to 51.9%. Our results establish a strategy to facilitate excitons dissociation through molecular regulation induced BIEF, targeting the intrinsic high EBE and low EDE of polymer photocatalysts.

关键词： Crystalline carbon nitride Exciton binding energy Built-in electric field Pyrimidine donor Excitons dissociation