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Semantic information processing in industrial networks

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The Journal of China Universities of Posts and Telecommunications 2022年第1期29卷 41-49页

作者： Yao Shengshi Wang Sixian Dai Jincheng niu Kai Xu Wenjun Zhang ping The Key Laboratory of Universal Wireless Communications(Ministry of Education) Beijing University of Posts and TelecommunicationsBeijing 100876China The Peng Cheng Laboratory Nanshan DistrictShenzhen 518052China The State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China

The industrial Internet of things(industrial IoT, IIoT) aims at connecting everything, which poses severe challenges to existing wireless communication. To handle the demand for massive access in future industrial networks, semantic information processing is integrated into communication systems so as to improve the effectiveness and efficiency of data transmission. The semantic paradigm is particularly suitable for the purpose-oriented information exchanging scheme in industrial networks. To illustrate its applicability, typical industrial data are investigated, i.e., time series and images. Simulation results demonstrate the superiority of semantic information processing, which achieves a better rate-utility tradeoff than conventional signal processing.

关键词： semantic information semantic communication industrial Internet of things signal processing

Recent advances of transition-metal metaphosphates for efficient electrocatalytic water splitting

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Carbon Energy 2023年第12期5卷 153-174页

作者： Yuanyuan Zhang Jie Wu Bingrong Guo Haohao Huo Siqi niu Siwei Li ping Xu School of Chemical Engineering and Technology Institute of Industrial CatalysisXi'an Jiaotong UniversityXi'anShaanxiChina MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbinHeilongjiangChina Dalian National Laboratory for Clean Energy Division of Energy StorageDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianLiaoningChina

Sustainable production of H2 through electrochemical water splitting is of great importance in the foreseeable ***-metal metaphosphates(TMMPs)have a three-dimensional(3D)open-framework structure and a high content of P(which exists as PO3-),and therefore have been recognized as highly efficient catalysts for oxygen evolution reaction(OER)and the bottleneck of electrochemical water ***,TMMPs can also contribute to hydrogen evolution reaction(HER)in alkaline and neutral media by facilitating water dissociation,and thus,overall water splitting can be achieved using this kind of *** this timely review,we summarize the recent advances in the synthesis of TMMPs and their applications in OER and *** present a brief introduction of the structure and synthetic strategies of TMMPs in the first two ***,we review the latest progress made in research on TMMPs as OER,HER,and overall water-splitting *** this part,the intrinsic activity of TMMPs as well as the current strategy for improving the catalytic activity will be discussed ***,we present the future opportunities and the remaining challenges for the application of TMMPs in the electrocatalysis field.

关键词： electrocatalysis synthetic strategies transition-metal metaphosphates water splitting

电感耦合等离子体质谱法测定水体中7种重金属元素的方法研究

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现代化工 2025年第1期45卷 256-260页

作者：李小辉袁润蕾韩瑞张芳冯兰慧王亚萍张辰子河南省地质局地质灾害防治中心自然资源部贵金属分析与勘查技术重点实验室河南郑州450012

建立了电感耦合等离子体质谱法同时测定水体中铬、铜、锌、铅、镉、镍、钼7种重金属元素含量的分析方法,在最佳的分析条件下,在一定的浓度范围内所分析的7种重金属元素具有良好的线性关系,相关系数均大于0.9999,方法检出限为0.03~0.11μ... 详细信息

建立了电感耦合等离子体质谱法同时测定水体中铬、铜、锌、铅、镉、镍、钼7种重金属元素含量的分析方法,在最佳的分析条件下,在一定的浓度范围内所分析的7种重金属元素具有良好的线性关系,相关系数均大于0.9999,方法检出限为0.03~0.11μg/L。对水质标准物质进行测定,各元素的测定值与认定值之间无显著性误差,测定结果的相对标准偏差RSD(n=6)为0.67%~4.08%;通过对实际样品进行加标回收实验,加标回收率为94.0%~107%;同时还对不同类型的水样进行分析,结果表明该方法具有较宽的动态线性范围,可满足各种类型水样中多种重金属元素的同时测定。

关键词：电感耦合等离子体质谱法水体重金属

Cooling effect of urban parks and their relationship with urban heat islands

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Atmospheric and Oceanic Science Letters 2016年第4期9卷 298-305页

作者： YANG ping XIAO Zi-niu YE Meng-Shu China Metrological Administration Training Center BeijingChina Institute of Urban Meteorology China Meteorological AdministrationBeijingChina Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina

It is claimed that open spaces in cities, such as parks, have an urban cooling effect. However, the relationship between urban parks and adjacent districts is still not explicit. In order to clarify the interaction between urban parks and their urban surroundings, this paper takes the Temple of Heaven Park （THP） as an example of a park station and focuses on analyzing the differences with a nearby urban *** is located in the center of Beijing, and the nearest urban station is Tian An Men. It is interesting that the cooling effect of THP reaches a peak and remains stable when its city background urban heat island （UHI） varies within a given range, but becomes unstable when the UHI goes beyond the range. This is called an enhanced cooling effect in this paper. As a result, the UHi intensities （UHIIs） are calculated in order to comprehend the role of the park cooling effect in the urban heating characteristics of Beijing. By comparison with five other park-district pairs, this paper attempts to identify the causes of the enhanced cooling effect. It is found that six park-district pairs consistently demonstrate a persistently stronger cooling rate during the night, and that the water coverage might be a key factor in enhancing the park cooling effect. Based on further investigation of the influence of surrounding UHIs on the park cooling effect, it is found that the UHII differences in park-district pairs show quasi-linear changes within a given range as the UHli of the surrounding district increases.

关键词： Cooling effect urban parks park district pair urban heatisland

Carbon steel anticorrosion performance and mechanism of sodium lignosulfonate

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Rare Metals 2024年第1期43卷 356-365页

作者： Bo-Kai Liao Rui-Xuan Quan ping-Xian Feng Huan Wang Wei Wang Li niu School of Chemistry and Chemical Engineering Guangzhou Key Laboratory of Sensing Materials and DevicesJoint Institute of Guangzhou University and Institute of Corrosion Science and TechnologyGuangzhou UniversityGuangzhou 510006China

Lignin is a typical biological macromolecule with a three-dimensional network structure and abundant functional groups. It has excellent ionic complexation ability and amphiphilic molecular structure *** this study, the carbon steel anticorrosion performance of sodium lignosulfonate(SLS) in an acid solution was evaluated using the weight loss method, electrochemical measurements, scanning vibration electrode technique(SVET), and surface characterization methods. SLS exhibited excellent corrosion inhibition efficiency for Q235carbon steel in 1 mol·L^(-1) HCl, reaching a maximum value of 98%. A low SLS concentration of 20 mg·L^(-1) resulted in the maximum corrosion inhibition efficiency, which remained nearly constant at higher SLS *** SVET test demonstrated that the formation of an SLS adsorption film can impede corrosion. This study confirms the significance of the application of green biomass resources in the field of metal corrosion protection and green functional materials.

关键词： Lignin Sodium lignosulfonate Corrosion inhibitor Carbon Steel

Distribution of Vascular Plant Species Richness Along an Elevational Gradient in the Dongling Mountains, Beijing, China

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Journal of Integrative Plant Biology 2006年第2期48卷 153-160页

作者： Hai-Bao Ren Shu-Kui niu Lin-Yan Zhang Ke-ping Ma Laboratory of Quantitative Vegetation Ecology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China College of Natural Resources and Environment Beijing Forestry University Beijing 100083 China International Institute of Earth System Science Nanjing University Nanjing 210093 China

Quantifying spatial patterns of species richness and determining the processes that give rise to these patterns are core problems In blodlverslty theory. The aim of the present paper was to more accurately detect patterns of vascular species richness at different scales along altitudinal gradients In order to further our understanding of blodlverslty patterns and to facilitate studies on relationships between blodlverslty and environmental factors. Species richness patterns of total vascular plants species, Including trees, shrubs, and herbs, were measured along an altitudinal gradient on one transect on a shady slope In the Dongllng Mountains, near Beljlng, China. Direct gradient analysis, regression analysis, and geostatlstlcs were applied to describe the spatial patterns of species richness. We found that total vascular species richness did not exhibit a linear pattern of change with altitude, although species groups with different ecological features showed strong elevatlonal patterns different from total species richness. In addition to total vascular plants, analysis of trees, shrubs, and herbs demonstrated remarkable hierarchical structures of species richness with altitude （I.e. patchy structures at small scales and gradients at large scales）. Species richness for trees and shrubs had similar spatial character-Istics at different scales, but differed from herbs. These results Indicated that species groups with similar ecological features exhibit similar blodlverslty patterns with altitude, and studies of blodlverslty based on species groups with similar ecological properties or life forms would advance our understanding of variations In species diversity. Furthermore, the gradients or trends appeared to be due mainly to local variations In species richness means with altitude. We also found that the range of spatial scale dependencies of species rlchnese for total vascular plants, trees, shrubs, and herbs was relatively large. Thus, to detect the relationshi

关键词： geostatistics life form patterns scale species richness.

Fuzzy Neural Model for Flatness Pattern Recognition

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Journal of Iron and Steel Research International 2008年第6期15卷 33-38页

作者： JIA Chun-yu SHAN Xiu-ying LIU Hong-min niu Zhao-ping School of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China

For the problems occurring in a least square method model, a fuzzy model, and a neural network model for flatness pattern recognition, a fuzzy neural network model for flatness pattern recognition with only three-input and three output signals was proposed with Legendre orthodoxy polynomial as basic pattern, based on fuzzy logic expert experiential knowledge and genetic-BP hybrid optimization algorithm. The model not only had definite physical meanings in its inner nodes, but also had strong self-adaptability, anti interference ability, high recognition precision, and high velocity, thereby meeting the demand of high-precision flatness control for cold strip mill and providing a convenient, practical, and novel method for flatness pattern recognition.

关键词： flatness pattern recognition Legendre orthodoxy polynomial genetic-BP algorithm fuzzy neural network

Synthesis of crystalline g-C_(3)N_(4) with rock/molten salts for efficient photocatalysis and piezocatalysis

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Green Energy & Environment 2024年第5期9卷 890-898页

作者： Tingting Xu Jung Hur ping niu Shulan Wang Sangwook Lee Sang-Eun Chun Li Li Department of Chemistry College of ScienceNortheastern UniversityShenyang110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819China School of Metallurgy Northeastern UniversityShenyang110819China School of Materials Science and Engineering Kyungpook National UniversityDaegu41566Republic of Korea School of Industrial Technology Advances Kyungpook National UniversityDaegu41566Republic of Korea

Graphitic carbon nitride(g-C_(3)N_(4))is emerging as a promising visible-light photocatalyst while the low crystallinity with sluggish charge separation/migration dynamics signiﬁcantly restricts its practical ***,synthesizing highly crystalline g-C_(3)N_(4) with sufﬁcient surface activities still remains ***,different from using alkali molten salts which is commonly reported,we propose an approach for synthesis of highly crystalline g-C_(3)N_(4) with FeCl3/KCl rock/molten mixed *** rock salt can serve as the structure-directing template while molten salt provides the required liquid medium for ***,the synthesized photocatalyst showed further enhanced crystallinity and improved surface area along with high p/p*excitation compared with crystalline C_(3)N_(4) prepared from conventional molten-salt *** catalytically advantageous features lead to its superior photocatalytic and piezocatalytic activities with a high reactivity for overall water splitting that is not commonly reported for C_(3)N_(4).This work provides an effective strategy for structural optimization of organic semiconductor based materials and may inspire new ideas for the design of advanced photocatalysts.

关键词： High crystallinity Carbon nitride Photocatalysis Piezocatalysis Overall water splitting

Thermodynamic modeling of the Ge-La binary system

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International Journal of Minerals,Metallurgy and Materials 2012年第8期19卷 689-698页

作者： Miao Liu Chang-rong Li Zhen-min Du Cui-ping Guo Chun-ju niu School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China The 3rd Department Institute of Chemical Defense of PLA Beijing 102205 China

The Ge-La binary system was critically assessed by means of the calculation of phase diagram （CALPHAD） technique. The asso- ciate model was used for the liquid phase containing the constituent species Ge, La, Ge3La5, and Ge1.7La. The terminal solid solution diamond-（Ge） with a small solubility of La was described using the substitutional model, in which the excess Gibbs energy was formulated with the Redlich-Kister equation. The compounds with homogeneity ranges, μ（Gel.7La）, β（Ge1.7La）, and （GeLa）, were modeled using two sublatrices asα（Ge,La）l.7La, β（Ge,La）l.7La, and （Ge,La）（Ge,La）, respectively. The intermediate phases with no solubility ranges, Ge4Las, GeaLa4, Ge3Las, and GeLa3, were treated as stoichiometric compounds. The three allotropic modifications of La, dhcp-La, fcc-La, and bcc-La, were kept as pure element phases since no solubility of Ge in La was reported. A set of self-consistent thermodynamic parameters of the Ge-La binary system was obtained. The calculation results agree well with the available experimental data from literatures.

关键词： hydrogen storage alloys binary systems germanium lanthanum thermodynamics modeling phase diagrams