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超高交联树脂吸附酚类的热力学研究与机理探讨

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水处理技术 2004年第2期30卷 82-84,87页

作者：邱宇平陈金龙李爱民费正皓朱兆连南京大学环境学院污染控制与资源化国家重点实验室江苏南京210093

合成和表征了超高交联树脂AM-1,以大孔吸附树脂AmberliteXAD-4为参照,比较研究了其在水溶液中吸附邻硝基苯酚,对硝基苯酚的吸附行为和热力学性质,测定了不同温度下的平衡吸附量,Langmuir模型和Freundlich模型均能很好拟合。利用Freundl... 详细信息

合成和表征了超高交联树脂AM-1,以大孔吸附树脂AmberliteXAD-4为参照,比较研究了其在水溶液中吸附邻硝基苯酚,对硝基苯酚的吸附行为和热力学性质,测定了不同温度下的平衡吸附量,Langmuir模型和Freundlich模型均能很好拟合。利用Freundlich模型求得△H、△G、△S。研究发现,AM-1型树脂比表面小于XAD-4型树脂的比表面,而吸附能力却更强。这得益于其更多的微孔体积及表面活性基团。

关键词：交联树脂酚类吸附作用热力学 COD 温度吸附量含酚废水废水处理

Simulation of the continuous casting process in a mold of free-cutting steel 38MnVS based on a MiLE method

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 562-569页

作者： Fu-mingWang Yun-jin Xia jin-long Wang Guo-zhong li School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China Key Lab of the Ministry of Education of China for Ecologic and Recycle Metallurgy University of Science and Technology Beijing Beijing 100083 China Jiangyin Xingcheng Iron and Steel Co. Ltd. Jiangyin 214429 China

A new method called mixed Lagrangian and Eulerian （MiLE） method was used to simulate the continuous casting process in a mold of free-cutting steel *** simulation results are basically in agreement with experimental data in the literature,achieving the three-dimensional visualization of temperature distribution,melt flow,shell thickness,and stress distribution of blooms in a *** is shown that the flow velocity of steel melt becomes smaller gradually as the casting *** the flow reaches a certain depth,two types of flow patterns can be observed in the upper zone of the *** first flow pattern is to flow downwards,and the second one is to flow upwards to the *** corner temperature is higher,and the thickness is thinner than those in the *** effective stress in the corner area is much bigger than that in the mid-face,indicating that the corner area is the dangerous zone of cracking.

关键词： free-cutting steel melt flow continuous casting computer simulation

First Principles Study on FeAs Single Layers

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Chinese Journal of Chemical Physics 2009年第2期22卷 139-142页

作者： Jun Dai Zhen-yu li jin-long Yang Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Hefei 230026 China

FeAs^- single layer is tested as a simple model for LaFeAsO and BaFe2As2 based on firstprinciples calculations using generalized gradient approximation （GGA） and GGA＋U. The calculated single-layer geometric and electronic structures are inconsistent with that of bulk materials. The bulk collinear antiferromagnetic ground state failed to be obtained in the FeAs^- single layer. The monotonous behavior of the Fe-As distance in z direction upon electron or hole doping is also in contrast with bulk materials. The results indicate that, in LaFeAsO and BaFe2As2, interactions between FeAs layer and other layers beyond simple charge doping are important, and a single FeAs layer may not represent a good model for Fe based superconducting materials.

关键词： Superconductivity FeAs layer Magnetism Density functional theory

Increase in the variability of terrestrial carbon uptake in response to enhanced future ENSO modulation

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 32-38页

作者： Younong li li Dan jing Peng Qidong Yang Fuqiang Yang Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of climate change in middle and low latitudes and thus strongly influences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon flux variability are projected to increase in the future,but their connection still needs further *** investigate the impact of future ENSO modulation on carbon flux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon flux variability in middle and low latitudes,and their relationship,under different scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon flux variability showing an increasing trend in the *** higher the emissions scenario,especially SSP5-8.5 compared to SSP2-4.5,the greater the increase in *** flux variability in the middle and low latitudes under SSP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under SSP5-8.5 it increases by 58.2%.Further analysis suggests that ENSO influences mid-and low-latitude carbon flux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of gross primary productivity towards regional temperature fluctuations,combined with the intensified influence of ENSO on land surface temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

Synthesis and characterization of li_4Ti_5O_(12) via a hydrolysis process from TiCl_4 aqueous solution

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Rare Metals 2014年第4期33卷 459-465页

作者： Xuan-Yu Wang Yun-Jiao li Cang Xu long Kong lin li School of Metallurgical Science and Engineering Central South University

Spinel-type lithium and titanium composite oxide li4TisO12 was successfully synthesized via a novel hydrolysis method followed by calcination using titanium tetrachloride （TIC14） and lithium hydroxide （liOH.H2O） as raw materials. Three major factors, including liOH con- centration, liOH dosage, and hydrolysis temperature were studied for optimizing the synthetic conditions to obtain a phase-pure li4Ti5012. The physical and electrochemical properties of samples were characterized by X-ray dif- fraction （XRD）, thermogravimetric analysis （TGA）, fourier transform infrared spectroscopy （FT-IR）, scanning electron microscopy （SEM）, and constant current discharge-charge test. The FT-IR results indicate the presence of [TiO6] octahedra. The SEM images show that the li4Ti5O12 pre- cursor obtained is an amorphous solid with an irregular and rough morphology. It is revealed that the phase-pure spinel li4Ti5O12 powders with well crystallization and regular morphology can be obtained by calcining the precursor at 800 ℃ for 6 h. The constant current discharge-charge tests indicate that the li4TisO12 material delivers an excellent cycling ability, maintaining 93.8 % of its initial specific capacity after 60 cycles at a current density of 0.5C.

关键词： lithium ion battery Titanium tetrachloride li4Ti5O12 Synthesis Hydrolysis method

Correlation Between Additive Noises Induced First-Order Phase Transition in a Two-Mode Laser

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Chinese Physics Letters 1996年第11期13卷 833-836页

作者： long Quan CAO li WU Da-jin li Zai-guang National Laboratory of Laser Technology Huazhong University of Science and TechnologyWuhan 430074 CCAST(World Laboratory) P.O.Box 8730Beijing 100080 Department of Physics Huazhong University of Science and TechnologyWuhan 430074

A phenomenological theory about the correlation between additive noises,in a two-mode laser arising from scattering of photons by the medium in the laser cavity is *** is applied to an inhomogeneously broadened two-mode ring *** have obtained an approximate expression for the steady-state intensity distribution,in which a first-order phase transition is found.

关键词： Transition additive inhomogeneous

ReCSA:a dedicated sort accelerator using ReRAM-based content addressable memory

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Frontiers of Computer Science 2023年第2期17卷 1-13页

作者： Huize li Hai jin long ZHENG Yu HUANG Xiaofei liAO National Engineering Research Center for Big Data Technology and System Services Computing Technology and System LabClusters and Grid Computing LabSchool of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China

With the increasing amount of data,there is an urgent need for efficient sorting algorithms to process large data *** sorting algorithms have attracted much attention because they can take advantage of different hardware's *** the traditional hardware sort accelerators suffer“memory wall”problems since their multiple rounds of data transmission between the memory and the *** this paper,we utilize the in-situ processing ability of the ReRAM crossbar to design a new ReCAM array that can process the matrix-vector multiplication operation and the vector-scalar comparison in the same array *** this designed ReCAM array,we present ReCSA,which is the first dedicated ReCAM-based sort *** hardware designs,we also develop algorithms to maximize memory utilization and minimize memory exchanges to improve sorting *** sorting algorithm in ReCSA can process various data types,such as integer,float,double,and *** also present experiments to evaluate the performance and energy efficiency against the state-of-the-art sort *** experimental results show that ReCSA has 90.92×,46.13×,27.38×,84.57×,and 3.36×speedups against CPU-,GPU-,FPGA-,NDP-,and PIM-based platforms when processing numeric data *** also has 24.82×,32.94×,and 18.22×performance improvement when processing string data sets compared with CPU-,GPU-,and FPGA-based platforms.

关键词： ReCAM parallel sorting architecture design processing-in-memory

Chain store game based channel allocation in cognitive radio system

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The Journal of China Universities of Posts and Telecommunications 2010年第1期17卷 1-8页

作者： li jin-long ZHU Ping WANG Xu-fa School of Computer Science and Technology University of Science and Technology of China Hefei 230027 China

In adaptive channel allocation for secondary user （SU） of cognitive radio （CR） system, it is necessary to consider allocation process from the temporal perspective. In this article, a chain store game is modeled to achieve SU＇s equilibrium state. Due to the computational complexity of solving equilibrium states, the authors explore the correlated equilibrium （CE） by importing signal mechanisms based on time and sequence number. Also, correlated equilibrium based game algorithms are presented. Simulations show that these algorithms are superior to other allocation algorithms both in channel utilization and communication time.

关键词： CR dynamic specturm allocation chain store game Nash equilibrium (NE) correlated equilibrium (CE)

The 200-hPa Wind Perturbation in the Subtropical Westerly over East Asia Related to Medium-Range Forecast of Summer Rainfall in China

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Journal of Meteorological Research 2018年第3期32卷 491-502页

作者： Ronghua jin Yan li Qingrou long Sijia liU National Meteorological Center China Meteorological AdministrationBeijing 100081 Key Laboratory of Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou 730000 Chengdu University of Information Technology Chengdu 610225

The 200-hPa wind perturbation(WP) in the subtropical westerly over East Asia(SWEA) has seldom been examined in previous studies, especially in connection with forecast of the summer rainfall in China. Based on the daily NCEP/NCAR reanalysis data and precipitation observations in China from 1 June to 31 August of 1960-2015, this study first systematically analyzes the spatiotemporal distribution features of the 200-hPa WP in the SWEA on different scales, especially during the Meiyu season in the Yangtze-Huaihe region and during the rainy period in North China, by using spectral decomposition and period analysis. It is found that in the 56-yr mean fields, the 200-hPa WP in the SWEA is collocated with the East Asian subtropical jet(EASJ), with the centers of the two systems coincidentally overlapped. The WP filed in the subtropical westerly mainly comprises planetary-and synoptic-scale waves. The quasi-stationary planetary-scale wave seems to determine the shape and intensity of the WP in the SWEA, while the synoptic-scale wave is closely related to the local central intensity of the WP. The daily evolution of the 56-yr mean fields shows that, following the northward(southward) movement of SWEA from 1 June to 31 August, the planetaryscale WP in the SWEA becomes gradually weakened(intensified) whereas the synoptic-scale WP is slightly intensified(weakened).The results also reveal that during the Meiyu season in the Yangtze-Huaihe region, the WP in the SWEA moves northward slowly around 37°-39°N, demonstrating a quasi-biweekly oscillation in its geographic location, which is largely attributed to the strong(weak) planetary-scale(synoptic-scale) component. On the contrast, in the summer rainy season over North China, the WP in the SWEA further strives northward beyond 40°N, showing both quasi-biweekly and weekly oscillations in its position; meanwhile, the planetary-scale wave in the SWEA becomes weakened whereas the synoptic-scale wave is enhanced. These salient variatio

关键词： westerly wind perturbation subtropical westerly East Asia spectral decomposition rainy season in eastern China period analysis