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Asymmetry in the Arctic Oscillation Teleconnection with January Cold Extremes in Northeast China

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Atmospheric and Oceanic Science Letters 2015年第6期8卷 386-391页

作者： he sheng-ping Climate Change Research Center Chinese Academy of Sciences Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences

The connection of the Arctic Oscillation(AO)with the frequency of temperature extremes over East Asia during boreal winter has been documented by many *** study describes an asymmetry in the relationship between the January AO and the simultaneous cold extremes in Northeast China(NEC),and further reveals a breakdown of this *** is demonstrated that the frequency of January cold extremes in NEC shows significant(insignificant)negative correlation with the simultaneous negative(positive)phase of the *** possible explanation for such an asymmetry is that the Arctic center of negative AO extends more southwards to Siberia compared with that of positive AO,conducive to a closer connection with the frequency of an extreme Siberian *** a result,the frequency of January cold extremes in NEC shows a more significant relationship with the negative *** other related explanation is that,concurrent with the negative phase of the AO,there is an evident meridional stationary planetary wave in the upper troposphere around(30°N,100–300 hP a),which disappears in the positive ***,the negative AO could better reflect the fluctuation of the subtropical westerly wind and the synoptic-scale transient wave activity,which is closely related to the frequency of cold extremes in *** with a positive polarity of the AO trend since the mid-1980s,the connection between the cold extremes over NEC and the AO during January has been weakened.

关键词： Arctic Oscillation temperature extremes asymmetry

EFFECTS OF NH_4Cl ON The INTERACTION BETWEEN POLY(ETHYLENE OXIDE) AND IONIC SURFACTANTS IN AQUEOUS SOLUTIONS

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Chinese Journal of Polymer Science 2008年第1期26卷 31-37页

作者： Li, Jing Li, Hua-zhen Yang, Hai-yang Zhu, ping-ping he, ping-sheng Univ Sci & Technol China Dept Polymer Sci & Engn Hefei 230026 Peoples R China

The interaction of poly(ethylene oxide)(PEO)with the ionic surfactants,sodium dodecylsulfate(SDS)and cetyltrimethylammonium chloride(CTAC)respectively,in aqueous solutions containing a certain concentration of NH_4Cl, is studied by the viscosity *** has been found that the ion-dipole interaction between PEO and ionic surfactants is changed considerably by the organic *** anionic suffactant of SDS,the addition of NH_4Cl into solution strengthens the interaction between PEO and the headgroup o...

关键词： Viscosity Ion-dipole interaction Non-ionic polymer Ionic surfactant NH_4Cl

A New Method to Study the Sol-gel Transition Process of Organic/Inorganic Hybrid Materials

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Chemical Research in Chinese Universities 2005年第5期21卷 606-610页

作者： GUO Bin GAO Jian-gang CheN Da-zhu LIU Jian-ping he ping-sheng ZHANG Qi-jin Structure Research Laboratory University of Science and Technology of China Hefei 230026 P. R. China Department of Polymer Science and Engineering University of Science and Technology of China Hefei 230026 P. R. China

The sol-gel transition process of PMMA/SiO2 hybrid materials was first studied by means of the dynamic torsional vibration method. The different stages of the transition can be described by the change of torque. The temperature-dependent measurement of the gel time（ tg ） gives the possibility to determine the apparent activation energy.（ Ea ） of this transition according to Flory＇s gelation theory. The non-equilibrium thermodynamic fluctuation theory was used to predict the transition behavior. The isothermal transition experiments on hybrid sols with different TEOS（tetraethyl orthosilicate） contents were carried out. The results show that the Ea of a hybrid sol is higher than that of a non- hybrid sol of a TEOS-water-ethanol system. The increasing of TEOS content in a hybrid sol has no obvious effect on the Ea value, but it can enhance the sol-gel .reaction rate.

关键词： Sol-gel transition Organic/inorganic Hybrid material DTVM

New Type Regulating Valve Applied in Cooling System of Blast Furnace

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Journal of Iron and Steel Research International 2004年第2期11卷 1-3页

作者： he sheng-ping ZOU De-yu XU Gang LU De-chang Chongqing University Chongqing Iron and Steel Co

A new type regulating valve with the cooling mode of constant temperature difference water supply, temperature difference self operated regulating valve, was introduced into blast furnace cooling system to overcome shortcomings of the cooling mode of constant flow rate water supply. The results show that the temperature difference between inlet and outlet water of cooling wall can be decreased greatly and steadily, and the water supply for blast furnace cooling can be reduced considerably.

关键词： blast furnace cooling system self operated regulating valve

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Properties of High Basicity Mold Fluxes for Peritectic Steel Slab Casting

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Journal of Iron and Steel Research International 2012年第7期19卷 39-45页

作者： LONG Xiao he sheng-ping XU Jian-fei HUO Xu-ling WANG Qian Chongqing Key Laboratory of Metallurgical Engineering College of Materials Science and EngineeringChongqing UniversityChongqing 400044China

In high speed continuous casting of peritectic steel slabs, mold fluxes with high basicity are required for less surface defect product. However, the basicity of remaining liquid slag film tends to decrease in casting process because of the crystallization of 3CaO ·2SiO2 · CaF2. Thus, a way is put forward to improve mold fluxesr properties by raising the original basicity. In order to confirm the possibility of this method, the effect of rising original basicity on the properties of mold fluxes is discussed. Properties of high fluorine based mold fluxes with different basicities and contents of CaF2 , Na2 O, and MgO were measured, respectively. Then, properties of higher basicity mold fluxes were discussed and compared with traditional ones. The results show that increasing the basicity index can improve the melting and flow property of mold fluxes. With the increasing basicity, crystallization rate of mold fluxes increases obviously and crystallization temperature tends to decrease when the basicity exceeds 1.35. The method presen- ted before is proved as a potential way to resolve the contradiction between horizontal heat transfer controlling and solidified shell lubricating for peritectic steel slab casting. But further study on improving the flow property of liquid slag is needed. This work can be used to guide mold fluxes design for high speed continuous casting of peritectic steel slabs.

关键词： mold flux high basicity crystallization property peritectic steel

Simulated and projected relationship between the East Asian winter monsoon and winter Arctic Oscillation in CMIP5 models

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Atmospheric and Oceanic Science Letters 2018年第5期11卷 417-424页

作者： LI Shuo he sheng-ping LI Fei WANG Hui-Jun Nansen-Zhu International Research Center Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Climate Change Research Center Chinese Academy of SciencesBeijingChina College of Earth Science University of Chinese Academy of SciencesBeijingChina Geophysical Institute University of Bergen and Bjerknes Centre for Climate ResearchBergenNorway NILU–Norwegian Institute for Air Research KjellerNorway Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of Meteorological Disaster Ministry of EducationNanjing University for Information Science and TechnologyNanjingChina

Interdecadal change in the relationship between the East Asian winter monsoon(EAWM)and the Arctic Oscillation(AO)has been documented by many *** study,utilizing the model outputs from phase 5 of the Coupled Model Intercomparison Project(CMIP5),evaluates the ability of the coupled models in CMIP5 to capture the intensified relationship between the EAWM and winter AO since the 1980s,and further projects the evolution of the EAWM–AO relationship during the 21st *** is found that the observed evolution of the EAWM–AO relationship can be reproduced well by some coupled models(e.g.,GFDL-ESM2M,GISS-E2-H,and MPI-ESM-MR).The coupled models’simulations indicate that the impact of winter AO on the EAWM-related circulation and East Asian winter temperature has strengthened since the *** interdecadal change in the EAWM–AO relationship is attributed to the intensified propagation of stationary planetary waves associated with winter *** under the RCP4.5 and RCP8.5 scenarios suggest that the EAWM–AO relationship is significant before the 2030s and after the early 2070s,and insignificant during the 2060s,but uncertain from the 2030s to the 2050s.

关键词： East Asian winter monsoon(EAWM) winter Arctic Oscillation(AO) CMIP5 interdecadal change

Solidification Properties of CaO-SiO_2-TiO_2 Based Mold Fluxes

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Journal of Iron and Steel Research International 2011年第7期18卷 15-19,52页

作者： he sheng-ping HUANG Qing-yun ZHANG Guo-xing LU Yong-jian WANG Qian Chongqing Key Laboratory of Metallurgical Engineering College of Materials Science and EngineeringChongqing University Chongqing 400044 China

In continuous casting of peritectic steel grades sensitive to longitudinal cracking, the solidification properties of mold fluxes play an important role in keeping smooth running of continuous casting process and achieving high surface quality of casting strands. To reduce fluorine pollution in molten slag, types of CaO-SiO2-TiO2 （CTS） based mold fluxes were investigated. The solidification and crystallization properties, including viscosity η at 1 573 K, break temperature Tbr, crystallization ratio Rc and solidification mineragraphy were measured, which were compared with those of CaO-SiO2-CaF2 based mold fluxes. The experiments show that there are unstable viscosity-high tem- perature properties and high Tbr in part of CTS slag system, which are bad for lubrication between liquid flux film and strand. And when temperature is below Tbr, the viscosities change slowly during cooling in some part of this slag system, which imply that liquid mold fluxes solidify slowly and it is easy to cause surface longitudinal cracks on strand. Major mineragraphy of the CaO-SiO2-TiO2 based mold fluxes are CaO · TiO2 or CaO · TiO2 and CaO · SiO2 · TiO2. TiN and Ti（C,N） can be formed in mold fluxes bearing high TiO2 during the continuous casting.

关键词： mold flux solidification property peritectic steel mineragraphy

Development of Test Method for Measuring Sintering Temperature of Mould Fluxes

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Journal of Iron and Steel Research International 2011年第4期18卷 1-6页

作者： WANG Qian LU Yong-jian he sheng-ping WANG Li-juan K C Mills Chongqing Key Laboratory of Metallurgical Engineering Chongqing University Chongqing 400044 China Technology Center Shuicheng Iron and Steel (Group) Co Ltd IAupanshui 558023 Guizhou China Department of Materials Imperial College London London SW7 2AZ UK

Excessive sintering of mould fluxes can readily cause defects and sticker breakouts in continuously cast *** the sintering property is important to minimize problems related to sintering arising from the use of mould fluxes in continuous *** effective method of measuring the apparent sintering temperature has been developed in this *** method is based on monitoring the formation of cavities caused by melting of *** monitoring,the differential pressure of an inert gas flow was measured through a set volume of sample（mould flux A）held in a furnace *** apparent sintering temperature was defined in this test to determine sintering *** sintering properties of fluxes with various contents of carbon black were examined along with identification of mineralogical phases and the nature of the sinter for samples of mould flux A held for one hour at different *** experimental results indicated that the apparent sintering temperature（AST）was a useful parameter to assess the threat of problems related to sinter.

关键词： mould flux sintering property differential pressure apparent sintering temperature

CuSO_4 Micro-crystal Lattice Produced by Microcontact Printing

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Chemical Research in Chinese Universities 2002年第2期18卷 221-222页

作者： PAN Li-jia CheN Lei he ping-sheng TAO Xiao-ming QIAN Yi-tai XIA You-nan Department of Polymer Science and Engineering National Synchrotron Radiation Laboratory Department of Chemistry University of Science and Technology of ChinaHefei 230026P.R.China Department of Chemistry University of WashingtonSeattleWA 98195-170USA

An elastic stamp was produced by molding poly(dimethylsiloxane)(PDMS) against a master with micro\|patterns on the surface. Then a procedure named microcontact printing was carried out on the glass substrate with the ink of an octadecylsiloxane(OTS) solution. The OTS reacted with the glass and formed a self\|assembly monolayer, and the process produced hydrophobic micro\|patterns on hydrophilic substrate. Owing to a simple hydrophobic interaction between the CuSO\-4 solution and the monolayer, a regular CuSO\-4 micro\|crystal lattice could be produced.

关键词： Microcontact printing Poly(dimethylsiloxane) Octadecylsiloxane Cupric sulphate, Micro-crystal lattice