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Effect of RE-Modifier on Microstructure and Mechanical Property of High-Carbon Medium-Manganese Steel

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Journal of Iron and Steel Research International 2002年第1期9卷 36-39页

作者： song Yan-pei XIE Jing-pei ZHU Yao-min wang Ai-qin Luoyang Institute of Technology

The effect of RE-modifier on the microstructure and mechanical properties of high carbon-medium manganese steel has been investigated in present *** results showed that the RE-modifier can refine the crystalline grain of high-carbon medium-manganese *** shape and distribution of carbides are improved and the columnar grains and phosphide in grain boundary are ***,the impact toughness of the steel is increased by more than one time,compared with no addition of RE-modifier.

关键词： RE-modifier high-carbon medium-manganese steel microstructure and property

Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

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Science China Chemistry 2025年第01期 385-393页

作者： Jianwei wang Huan wang Kangning wang Wenhui wang Wenlin Zhang Yanzhong Zhen School of Chemistry & Chemical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

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Tunable LCST-type phase behavior of [FeCl4]--based ionic liquids in water

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Science China Chemistry 2016年第5期59卷 587-593页

作者： Yuanchao pei Yuan Cao Yanjie Huang Xinxin song Huiyong wang Yuling Zhao Jianji wang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China

In this work, 16 kinds of [FeCl4]--based magnetic ionic liquids （ILs） with different cation structures have been designed and synthesized, and their structures are characterized by IR and Raman spectroscopy. Then the lower critical solution temperature （LCST）-type phase behavior of these magnetic ILs in water is investigated as a function of concentration. It is shown that cat- ion structure, alkyl chain length and molar ratio of FeCl3/chloride IL have a significant influence on the LCST of the mixtures. The phase separation temperature can be tuned efficiently by these factors. Meanwhile, the LCST-type phase separation pro- cess is also investigated by dynamic light scattering. The results support the mechanism that the hydrogen bonds of the [Fefl4]- anion with water have been gradually disrupted to form ILs aggregates with increasing temperature. In addition, the stability of the ILs in water is also examined in some details. These LCST-type phase separation systems may have potential applications in extraction and separation techniques at room temperature.

关键词： magnetic ionic liquids IR and Raman spectroscopy lower critical solution temperature tunable phase separation

Graph Partitioning Method to Determine Servers Placement in CDN

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Journal of Harbin Institute of Technology(New Series) 2013年第2期20卷 61-68页

作者： An-Yu Zhou Hui-Qiang wang pei-You song College of Computer Science and Technology Harbin Engineering University Network and Education Technology Center Harbin University of Commerce Dept. of Computer Science University of New Mexico

To determine CDN cache servers'placement reasonably,an idea that using graph partitioning to solve the problem was put forward through theoretical analysis and the specific algorithm of partitioning was researched. The concept of graph partitioning for CDN was defined. The conditions of graph partitioning for CDN were demonstrated: the sum of the weights of the nodes in each subarea is as close as possible; edge cut between the subareas is as large as possible; internal nodes in each subarea are connected as far as possible. By reference to light vertex matching algorithm of graph partitioning for network simulation,a multilevel k-way algorithm of graph partitioning for CDN was proposed. The maximized edge cut k-way KL refinement algorithm was discussed. Graph partitioning is a feasible way to solve the problem of CDN servers'placement. Multilevel k-way algorithm is a feasible algorithm for CDN graph partitioning.

关键词： graph partitioning CDN servers placement matching algorithm

The coupling between hydrodynamic and purification efficiencies of ecological porous spur-dike in field drainage ditch

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Journal of Hydrodynamics 2018年第3期30卷 373-383页

作者： Lei Rao pei-fang wang Qing-song Dai Chao wang College of Mechanics and Materials Hohai University Nanjing 211100 China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of Education Hohai University Nanjing 210098 China College of Environment Hohai University Nanjing 210098 China

In this study, a series of ecological porous spur-dikes are arranged in an experiment channel to simulate a real field drainage ditch. The inside and outside flow fields of spur-dikes are determined by numerical simulations and experimental methods. An Ammonia-Nitrogen（NH3-N） degradation evaluation model is built to calculate the pollution removal rate by coupling with the inner flow field of the porous spur-dikes. The variations of the total pollutant removal rate in the channel are discussed in terms of different porosities and gap distances between spur-dikes and inlet flow velocities. It is indicated that a reasonable parameter matching of the porosity and the gap distance with the flow velocity of the ditch can bring about a satisfactory purification efficiency with a small delivery quantity of ecological porous materials.

关键词： Porous water permeable material ecological spur-dike field drainage ditch pollutant removal rate coupling

Control of Equiaxed Crystal Ratio of High Carbon Steel Billets by Circular Seam Cooling Nozzle

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Journal of Iron and Steel Research International 2011年第2期18卷 24-30页

作者： LI pei-song LU Jun-hui QIU Sheng-tao wang Zhong-ying ZHAO pei Northeastern University Shenyang 110004 Liaoning China State Key Laboratory of Advanced Steel Processing and Products Central Iron and Steel Research Institute Beijing 100081 China

A circular seam cooling nozzle and its online control system have been developed to reduce the center segregation in high carbon steel billets by decreasing the superheat of the molten steel and improving the equiaxed crystal ratio based on the numerical results. An industrial experiment has been carried out on a 150 mm× 150 mm caster to investigate the effect of the circular seam cooling nozzle on the superheat removal of the molten steel. The results show that the circular seam cooling nozzle can be used to control the casting temperature in a closed loop control system. The online control system can be effectively adapted to the variation of operating parameters. The casting lasts about 4 h and about 400 t steel is successfully produced in a continuous operation. The removal of about 14 ℃ superheat and the improvement of approximate 10% equiaxed crystal ratio can be achieved by the newly developed circular seam cooling nozzle.

关键词： circular seam cooling nozzle high equiaxed crystal ratio billet low superheat

Structural health monitoring and material safety with multispectral technique: A review

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Journal of Safety Science and Resilience 2022年第1期3卷 48-60页

作者： Xiaoqing Huang pei wang song Zhang Xiongtao Zhao Yupeng Zhang Department of Engineering Physics Tsinghua UniversityBeijing100084China Institute for Aero Engine Tsinghua UniversityBeijing100084China Innoviation and Research Institute of Hiwing Technology Academy Beijing100084China

Structural health monitoring is the technique which evaluate and analyze materials in the production and service *** this paper,the basic principles and characteristics of terahertz,infrared,visible-multispectral and X-ray nondestructive testing technologies with different penetration rates,spectral energy,detection accuracy and system complexity are *** on the types and causes of defects in aerospace materials,the correspond-ing testing techniques and nondestructive testing technology for different defects are also ***,the image processing technology of each detection technology is *** practice,it is usually necessary to select one or more test methods according to the material properties and damage *** differences in imaging techniques and processing algorithms are the major obstacles to joint multispectral *** there have been preliminary studies on the methods of combining and associating image data under different spectra,further research is needed on how to integrate more spectra for new,more complex applications.

关键词： Structural health monitoring Composite materials Multispectral

临床路径管理对急性冠脉综合征住院患者医疗质量的影响

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现代医院管理 2017年第2期15卷 45-47页

作者：杨建伟陆剑嵘宋培新王涟王静徐标南京大学医学院附属鼓楼医院南京市210008

目的比较急性冠脉综合征(ACS)患者采用临床路径管理前后,医疗质量和住院费用的变化。方法收集在我院住院的ACS患者数据,统计行临床路径管理前2年和后2年住院过程中药物的使用率,按照危险度评分及时行早期介入干预的百分率,住院过程中的... 详细信息

目的比较急性冠脉综合征(ACS)患者采用临床路径管理前后,医疗质量和住院费用的变化。方法收集在我院住院的ACS患者数据,统计行临床路径管理前2年和后2年住院过程中药物的使用率,按照危险度评分及时行早期介入干预的百分率,住院过程中的病死率以及平均住院费用和平均住院日。结果实行临床路径管理后平均路径率84.2%,平均变异率14.1%。和实施前比较,ACS住院患者他汀、ACEI、β-受体阻断剂、双联抗血小板药物使用率均明显提高(P<0.01);早期及时的冠脉急诊介入干预率明显提高(分别为85.2%和42.1%,P<0.01),扣除物价下调等因素,平均住院费用降低8.5%。平均住院日降低0.5d。平均住院死亡率也明显降低。结论实施临床路径管理,可以使ACS住院患者接受更规范的药物治疗,更好的早期介入干预,降低平均住院费用和平均住院日,也有降低住院死亡率的作用。

关键词：临床路径急性冠脉综合征住院管理医疗质量

Synthesis, Antimicrobial Activity, and Molecular Docking of Benzoic Hydrazide or Amide Derivatives Containing a 1,2,3-Triazole Group as Potential SDH Inhibitors

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Chinese Journal of Chemistry 2021年第5期39卷 1319-1330页

作者： Yue Ding Ling Zhang song Yang Zhong Li pei-Yi wang State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural BioengineeringMinistry of EducationCenter for R&D of Fine Chemicals of Guizhou UniversityGuiyongGuizhou 550025China College of Pharmacy East China University of Science&TechnologyShanghai 200237China

The present study was carried out in an attempt to synthesize a new class of antimicrobial agents containing a 1,2,3-triazole motif formed by classical copper catalyzed click *** bioassay results showed that five compounds 5a;5e,5h,5j,and 5k possessed a remarkable growth inhibitory activity against Botryosphaeria dothidea,Rhizoctonia solani and Gibberella zeae with EC_(50) values within 10.0-0.306μg/*** in vitro efficacy was better than those of the commercial agrochemicals Azoxystrobin,Boscalid,and *** vivo trials showed that compound 51 was effective for the control of rice sheath blight and wheat scab with the effects of 75% and 95%,*** mechanism studies suggested that target compounds were potential succinate dehydrogenase inhibitors(SDHIs),which were proposed by the agreeable molecular docking study and restrained SDH activity(IC_(50)=3.95 μg/mL,51).Interestingly,compounds 5r and 5s displayed good antibacterial activity against *** vivo screening of 5r and 5s against rice bacterial blight afforded a superior control effect(up to 51%)than those of commercial agents Bismerthiazol and Thiodiazole *** current studies could support some title compounds to be the lead compounds for exploring highly bioactive antimicrobial substrates,particularly the potential SDHIs.

关键词： Hydrazide Amide 1,2,3-Triazole Molecular docking SDH inhibitory activity