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Rare Metals 2024年第8期43卷 3702-3712页

作者： Zi-Jie Mu Yan-Jun Gao Wen-Shuai dong Zong-You li Qing-Yi Song Han-Jiao Huang li-dong xing Jian-Guo Zhang Wei Wang Qi-Yao Yu State Key Laboratory of Explosion Science and Technology School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The highly reversible insertion/extraction of large-radius K^+into electrode materials remains a tough goal,especially for con version-type ***,we design a current collector-integrated electrode(N-CoSe/CoSe_(2)-C@Cu) as an advanced anode for potassium-ion battery(PIBs).The conductive CoSe/CoSe_(2) heterojunction with rich Se vacancy defects,conductive sp^2 N-doped carbon layer,and the elastic copper foil matrix can greatly accelerate the electron transfer and enhance the structural ***,the well-designed N-CoSe/CoSe_(2)-C@Cu current collector-integrated electrode displays enhanced potassium storage performance with regard to a high capacity(325.1 mAh·g^(-1) at 0.1 A·g^(-1) after 200cycles),an exceptional rate capability(223.5 mAh·g^(-1) at2000 mA·g^(-1)),and an extraordinary long-term cycle stability(a capacity fading of only 0.019% per cycle over1200 cycles at 2000 mA·g^(-1)).Impressively,ex situ scanning electron microscopy(SEM) characterizations prove that the elastic structure of copper foil is merged into the cleverly designed N-CoSe/CoSe_(2)-C@Cu heterostructure,which buffers the deformation of structure and volume and greatly promotes the cycle life during the potassium/depotassium process.

关键词： Potassium-ion battery Integrated collector electrode CoSe CoSe_2 Heterojunction Copper foil matrix N-doped carbon

系统跃迁视角下推动欧亚大陆经济一体化的本质与方向

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云南社会科学 2024年第2期 92-99页

作者：蔡之兵李东兴中央党校(国家行政学院)经济学教研部

推动欧亚大陆经济一体化是应对全球地缘政治和经济贸易格局转变的必然要求,也是满足欧亚诸多国家发展利益最大化的有效路径。过去一段时间,全球不平等的交换体系、不安全的发展体系与不公平的治理体系使得过去全球经济系统长期处于不稳... 详细信息

推动欧亚大陆经济一体化是应对全球地缘政治和经济贸易格局转变的必然要求,也是满足欧亚诸多国家发展利益最大化的有效路径。过去一段时间,全球不平等的交换体系、不安全的发展体系与不公平的治理体系使得过去全球经济系统长期处于不稳定的状态,推动欧亚大陆经济一体化的目标就是要从旧系统的不稳定状态跃迁至新的系统稳态。为此,应从系统联接、系统耦合、系统运行等方面同时着手,不断增强欧亚大陆经济一体化的系统水平。在此基础上,应以当前主要区域合作协议为基准,在政治、经济、文化、地缘等领域进行全面合作,以产业转移、产业开发、产业转化、产业培育为抓手,创新探索科学有效的利益增长和分享机制,不断提高欧亚大陆经济一体化发展水平。

关键词：系统论欧亚大陆经济一体化系统跃迁

国家发展逻辑转变与新时代西部大开发战略的操作重点研究

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农村金融研究 2024年第8期 69-80页

作者：蔡之兵李东兴中央党校(国家行政学院)经济学教研部

在不同的发展阶段,国家面临的最优发展模式截然不同。立足百年未有之变局的时代背景,从发展环境、发展条件、发展阶段与发展目标等四个层面,指出当前我国面临的发展逻辑已经发生了深刻转变。在此基础上,结合西部地区发展实际,明确了这... 详细信息

在不同的发展阶段,国家面临的最优发展模式截然不同。立足百年未有之变局的时代背景,从发展环境、发展条件、发展阶段与发展目标等四个层面,指出当前我国面临的发展逻辑已经发生了深刻转变。在此基础上,结合西部地区发展实际,明确了这种发展逻辑的转变会从发展方式、发展格局、发展动力、发展载体等四个层面对新时代西部大开发战略提出新的挑战与要求。进一步分析表明,统筹发展和安全、加快构建新发展格局、加快建设全国统一大市场、加快发展新质生产力是国家发展逻辑转变对西部地区发展质量产生影响的具体表现。最后,结合西部地区适应新发展逻辑的不足与短板,提出坚持以提高统筹发展和安全的能力为战略主线、以提高构建新发展格局的能力为战略目标、以全国统一大市场建设的要求为战略保障、以提高发展新质生产力为战略重点是新时代西部大开发战略的操作重点,以期为西部大开发战略的有效实施提供更有价值的参考。

关键词：国家发展逻辑新时代西部大开发操作重点发展理论

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基于改进SGM的森林场景视差图生成方法

林业机械与木工设备 2024年第4期52卷 31-36页

作者：李智李兴东东北林业大学机电工程学院黑龙江哈尔滨150040

生成精确的视差图是采用双目视觉对森林冠层下进行三维重建、资源调查的基础。由于森林环境内结构复杂,视差不连续处较多,现有的算法应用于森林场景中会出现误匹配率较大、树干边缘轮廓不清晰的现象。针对上述问题,提出一种改进的Semi-G... 详细信息

生成精确的视差图是采用双目视觉对森林冠层下进行三维重建、资源调查的基础。由于森林环境内结构复杂,视差不连续处较多,现有的算法应用于森林场景中会出现误匹配率较大、树干边缘轮廓不清晰的现象。针对上述问题,提出一种改进的Semi-Global Matching(SGM)算法。首先在立体匹配的初始代价计算阶段,为避免由中心像素值突变造成的匹配错误,将Census中心像素值替换为四邻域像素点的平均值。然后对双目相机图像进行k-means聚类分割,将像素点分为几个不同的簇,在代价聚合过程中,融合聚类分割信息、像素颜色信息和像素梯度信息,分析像素点间的差异性,自适应调整能量函数中的惩罚项,使视差突变处依然能保持特征。最后使用亚像素细化、左右一致性检查、中值滤波优化视差值,获得更精确的视差图。实验结果表明,改进的SGM算法生成的视差图相较于传统的SGM算法精确度更高,对不同森林场景的鲁棒性更好。

关键词：森林场景 SGM 代价聚合视差优化

维普期刊数据库博看期刊

Effect of electromagnetic stirrer centered outside the mold on steel flow field of bloom continuous casting

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中国铸造:英文版 2023年第5期20卷 461-468页

作者： li-dong xing Yan-ping Bao Min Wang Yi-hong li State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing(USTB)Beijing 100083China Technical Support Center for Prevention and Control of Disastrous Accidents in Metal Smelting University of Science and Technology Beijing(USTB)Beijing 100083China School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China

Mold electromagnetic stirring technology for optimizing the flow of molten steel is now widely used in the continuous casting production process of high-quality ***,studies on the case that the center of the electromagnetic stirrer is located outside the mold have not been ***,the effect of the electromagnetic stirrer centered outside the mold on the steel flow field was studied in detail by means of numerical simulations.A Gauss meter was used to measure the magnetic induction intensity at different positions,currents,and *** test results were compared with the simulation results of electromagnetic stirring to calibrate and verify the accuracy of the electromagnetic ***,electromagnetic force was introduced into the flow field model as a source term to study its effect on the flow field under anomalous *** results show that when the center of the electromagnetic stirrer is located outside the mold,the magnetic field strength is about twice as strong as that located inside the *** also leads to an increase in the flow velocity near the electromagnetic *** a result,the optimal electromagnetic stirring parameters(200 A,2.5 Hz)were specified when the center of the electromagnetic stirrer is located outside the mold.

关键词： numerical modeling electromagnetic stirring fluid flow outside the mold bloom

Determination of sulfite in water samples by flow injection analysis with fluorescence detection

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Chinese Chemical Letters 2010年第12期21卷 1457-1461页

作者： li Qian Yin dong xing Yuan Min Zhang State Key Laboratory of Marine Environmental Science Environmental Science Research Centre Xiamen University Xiamen 361005 China

A fast,sensitive,and reliable method for the determination of sulfite（SO3^2-） in fresh water and seawater samples was *** proposed method was based on the reaction of o-phthalaldehyde（OPA）-sulfite-NH_3 in alkaline solution,with flow injection analysis and fluorescence *** experimental parameters were investigated in pure water and seawater matrixes. The detection limits（S/N = 3） were 0.006μmol/L in pure water and 0.018μmol/L in seawater for SO3^2-.The method was successfully applied to analyze SO3^2- iin the samples of rain water and flue gas desulfurization seawater.

关键词： Sulfite Fluorophotometry FIA Flue gas desulfurization seawater Rainwater

Sequential analysis of dimethyl sulfur compounds in seawater

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Chinese Chemical Letters 2007年第1期18卷 99-102页

作者： Meng li dong xing Yuan Quan Long li Xiao Ying Jin State Key Lab of Marine Environmental Science Xiamen University Environmental Science Research Centre of Xiamen University Xiamen 361005 China

A sequential method for the determination of dimethyl sulfur compounds, including dimethylsulfide （DMS）, dimethylsulfonio- propionate （DMSP） and dimethylsulfoxide （DMSO）, in seawater samples has been developed. Detection limit of 2.5 pmol of DMS in 25 mL sample, corresponding to 0.10 nmol/L, was achieved. Recoveries for dimethyl sulfur compounds were in the range of 68.6- 78.3%. The relative standard deviations （R.S.D.s） for DMS, DMSP and DMSO determination were 3.0, 5.4 and 7.4%, respectively.

关键词： Dimethylsulfide (DMS) Dimethylsulfoniopropionate (DMSP) Dimethylsulfoxide (DMSO) Purge and trap Microwave irradiation Sequential analysis

Roll Shape Setting Technology of Hot Galvanizing and Planishing Mill

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Journal of Iron and Steel Research International 2007年第1期14卷 33-36页

作者： BAI Zhen-hua YANG li-po li xing-dong GU Ting-quan Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 Hebei China College of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China Technique Center Baoshan Iron and Steel Co Ltd Shanghai 210900 China

A roll shape setting model was built for the hot galvanizing and planishing mill. The uniform transversal distributions of the front tension in the exit and the unit pressure were considered as the objective function. At the same time, the quality of the products, the stability of zinc layer, and the homogeneity of spangles were of considerable significance in the planishing process. The model was applied to the roll shape setting of the 1800 cold rolling 3# CGL hot galvanizing and planishing mill of Baosteel Co Ltd. After being planished, the flatness of a strip that was less than 6 I was more than 97%, and the flatness of others were less than 10 I; the pass percentage of the zinc lay- ers reached 100%.

关键词： hot galvanizing planishing mill roll shape optimization

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农林高校机械类专业英语教学改革与实践

林业机械与木工设备 2024年第6期52卷 104-107页

作者：李学艺王伟贾娜李兴东夏鹏东北林业大学黑龙江哈尔滨150040

机械类专业英语课程在农林高校工科专业课程体系中是一门非常重要的课程。在“十四五”规划和2035年远景目标的指引下对农林高校机械类专业英语教学现状与特点进行总结与讨论。同时,针对农林高校机械类专业英语教学工作提出教学改革措... 详细信息

机械类专业英语课程在农林高校工科专业课程体系中是一门非常重要的课程。在“十四五”规划和2035年远景目标的指引下对农林高校机械类专业英语教学现状与特点进行总结与讨论。同时,针对农林高校机械类专业英语教学工作提出教学改革措施与教材改革方法,重点在于明确农林高校机械类英语教学目标,丰富教学内容,并完善考核方式。提出的教学改革与实践方法对于农林高校机械类专业英语教学水平起到启发作用,同时采用的教学改革研究方法可作为其他行业高校课程教学改革的参考。

关键词：农林高校教学改革机械类专业英语高等教育

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Corrosion of Duplex Stainless Steel Manufactured by Laser Powder Bed Fusion: A Critical Review

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 587-606页

作者： Yiqi Zhou Decheng Kong Ruixue li xing He Chaofang dong Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China

Laser powder bed fusion (LPBF) is a commonly used additive manufacturing (AM) method for efficiently producing intricate geometric components. This investigation examines factors such as pores, cellular structure, grain size, and inclusions from the manufacturing process that contribute to the corrosion resistance of LPBF DSS. Furthermore, the as-built LPBF duplex stainless steel (DSS) is primarily ferrite due to the rapid cooling process. Therefore, the transformation of ferrite to austenite after various heat treatments in LPBF DSS and its corresponding corrosion resistance are presented. Additionally, a new mixed powder method is proposed to increase the austenite content in the as-built LPBF DSS. This review also focuses on the passivation capability and pitting corrosion performance in LPBF and conventional DSS. This article summarizes the variations in microstructure between as-built and heat-treated LPBF DSS, with their impacts on corrosion resistance, offering insights for manufacturing highly corrosion-resistant LPBF DSS.

关键词： Laser powder bed fusion Duplex stainless steel Microstructure Heat treatment Passivation Pitting corrosion