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| 1 | Sedimentary Features and Their Implications of Microdigital Stromatolites from the Mesoproterozoic Wumishan Formation at the Jixian Section in North China显示文摘在在天津的 Jixian 节的 Mesoproterozoic Wumishan 形成是一套超过 3000-m-thick stromatolitic 碳酸盐继任。在这继任,几个岩相单位,也就是说 subtidal stromatolitic biostrome, thrombolitic bioherm,潮汐公寓的 micritic 白云石和泻湖含白云石的页岩,当 Wumishan 骑车,完成被提名了的 peritidal 碳酸盐类型的许多米规模周期。重要地,许多 microdigital stromatolites 在 Wumishan 形成的更低的部分完成 Wumishan 周期的 stromatolitic biostrome 单位。这些 microdigital stromatolites 被古生物学家作为一个 stromatolitic 集合组织了,也就是说 Pseudogymnosolen mopanyuensis-Scuphus-Yangzhuang columnaris 集合。当霰石(石灰华) 海地板由 sedimentologists 猛抛,这些 microdigital stromatolites 也被解释了,并且进一步从海地板霰石作为过渡时期的特殊产品被认为猛抛对 Neoproterozoic 的碎屑状、泥泞的碳酸盐太古代。尽管为 stromatolitic 集合的概念的 stratigraphic 意思有一些限制,由古生物学家的分类上的详细研究提供重要线索理解 microdigital stromatolites 的 sedimentological 意思。而且,为 microdigital stromatolites 的结束的一根重要、明显的地平线在 Jixian 节在 Mesoproterozoic Wumishan 形成被记录,它提供有用信息理解 stromatolite 衰落发生在 c.1250 妈和演变碳酸盐世界前寒武纪。 | MEI Mingxiang GAO Jinhan MENG Qingfen LIU Zhirong | 2010 | Acta Geologica Sinica(English Edition)2010，84，3： | 8 |
| 2 | Extraction of penicillin G by aqueous two-phase system of [Bmim]BF_(4)/NaH_(2)PO_(4)显示文摘A novel approach for the extraction of penicil-lin G by aqueous two-phase system comprised of hydrophilic ionic liquid [Bmim]BF4 (1-butyl-3- methylimidazolium tetra-fluoroborate) and NaH2PO4 is reported. The effects of some important parameters involving the concentration of NaH2PO4, the concentration of penicillin G, the amount of [Bmim]BF4 on the formation of aqueous two-phase system and the extraction yield of penicillin were investigated. The primary result shows that the ATPS can take advantage of penicillin concentrated in upper phase at higher pH value for penicillin extraction from its aqueous solution without emul-sification. | LIU Qingfen HU Xuesheng WANG Yuhong YANG Ping XIA Hansong YU Jiang LIU Huizhou | 2005 | Chinese Science Bulletin2005，50，15： | 6 |
| 3 | Linear dynamic system method for tactile object classification显示文摘Lots of tactile sequences can be obtained by using a dexterous hand for grasping different objects.The ability of robotic environmental perception and dexterous manipulation will be significantly improved after these tactile sequences are correctly classified.Therefore,tactile sequences are separated into series of subgroups,and a method based on linear dynamical system(LDS)is used to extract features.Since these LDSs lie in nonEuclidean space,the Martin distance,which is a measurement different from Euclidean distance,is applied to calculate the distance between two LDSs,and the K-Medoid algorithm is used for clustering.The codebook is obtained after clustering and is used to represent time sequences to get a Bag-of-System(Bo S).Then the Bo S and labels are sent to Extreme Learning Machine(ELM)to train a classifier.Finally,three databases,KTH-7,KTH-10 and TSH-8 are used to evaluate our algorithm. | MA Rui LIU HuaPing SUN FuChun YANG QingFen GAO Meng | 2014 | Science China(Information Sciences)2014，57，12： | 3 |
| 4 | Out-of-step oscillation splitting criterion based on bus voltage frequency显示文摘Under the background of complicated interconnected network,the splitting criterion for accurately capturing the electrical center in real time is the prerequisite of power grid splitting.This paper studies the features of electric quantity in the electrical center in aspect of the instantaneous frequency,and proposes the out-of-step splitting criterion for power systems based on bus voltage frequency.Firstly,through the establishment and solution to the out-of-step model of the power grid,the analytical expression of the voltage frequency at any position is obtained in the out-of-step oscillation,and the voltage frequency features of electrical center and non-electrical center are analyzed in details.Then,this paper constructs the typical scene of migration of electrical center to study the change rules of voltage frequency.Finally,the splitting criterion based on bus voltage frequency is proposed as well as the instruction for use.This criterion is easy to be realized and can adapt to the migration of electrical center.Also it is free from the limits of power network structure and operational mode.Simulation results of CEPRI-36 system and interconnected network example of one actual region verify the accuracy and the effectiveness of the proposed criterion. | Fei TANG Jian YANG Qingfen LIAO Yifei WANG Jun JIA | 2015 | Journal of Modern Power Systems and Clean Energy2015，3，3： | 3 |
| 5 | An Expert System in FRP Composite Material Design显示文摘An expert system prototype for fibre-reinforced plastic matrix (FRP) composite material design, ESFRP, has been developed. The system consists of seven main functional parts: a general inference engine, a set of knowledge bases, a material properties algorithm base, an explanation engine, various data bases, several function models and the user interface. The ESFRP can simulate human experts to make design scheme for fibre-reinforced plastics design, FRP layered plates design and FRP typical engineering components design. It can also predict the material properties and make strength analysis according to the micro and macro mechanics of composite materials. A satisfied result can be gained through the reiterative design. | Qingfen LI, Zhaoxia CUI and Weimin WANG College of Mechanical & Electrical Engineering, Harbin Engineering University, Harbin 150001, China Jianhua GAO Department of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China | 2001 | Journal of Materials Science & Technology2001，17，5： | 2 |
| 6 | Role and mechanism of radiological protection cream in treating radiation dermatitis in rats显示文摘OBJECTIVE: To explore the role and mechanism of a radiation protection cream(Rp) in the treatment of radiation dermatitis, and to accumulate necessary technical information for a new drug report on Rp.METHODS: High-performance liquid chromatography was used to establish the method of measuring the main effective ingredients of sovereign and adjuvant herbs of Rp drugs, and to formulate the draft quality standards of Rp. A total of 48Sprague-Dawley male rats were randomly divided into the Model,Trolamine cream(Tc), Rp and Blank groups according to a random number table method.The skin of each rat's buttocks was irradiated using an electron linear accelerator to establish an acute radiation dermatitis model. The histological changes were observed under light microscopy and electron microscopy during wound healing and the effect of Rp on rat fibroblast Ku70/80 gene expression was detected at the transcriptional level.RESULTS: Pathological examination revealed that Rp protected the cellular and subcellular structures of skin after irradiation, promoting the proliferation and restoration of collagen fibers. Ku70/80 mRNA expression levels in the Rp and Tc groups were higher than that in the model group(P<0.05).Moreover,The majority of grade radiation dermatitis relative to the Model, Rp and Tc groups for reducing grade Ⅲ and Ⅳ dermatitis efficiency were 85.7%and 69.2%(P<0.05), respectively.The efficacy of Rp group in treating radiation dermatitis was better than the Trolamine cream group by16.5%(P<0.05).CONCLUSION: Compared with Tc, Rp had certain advantages in the efficacy and performance to price ratio.Thus, Rp is considered an effective alternative formulation for the prevention and treatment of radiation dermatitis. | Guohong Zu Yan Dou Qingfen Tian Houwei Wang Weichong Zhao Fusheng Li | 2014 | Journal of Traditional Chinese Medicine2014，34，3： | 2 |
| 7 | Selection of adsorbents for in-situ coupling technology of adsorptive desulfurization and biodesulfurization显示文摘In-situ coupling of adsorptive desulfurization and biodesulfurization is a new desulfurization technol- ogy for fossil oil. It has the merits of high-selectivity of biodesulfurization and high-rate of adsorptive desulfurization. It is carried out by assembling nano-adsorbents onto surfaces of microbial cells. In this work, In-situ coupling desulfurization technology of widely used desulfurization adsorbents of γ-Al2O3, Na-Y molecular sieves, and active carbon with Pseudomonas delafieldii R-8 were studied. Results show that Na-Y molecular sieves restrain the activity of R-8 cells and active carbon cannot desorb the sub- strate dibenzothiophene (DBT). Thus, they are not applicable to in-situ coupling desulfurization tech- nology. Gamma-Al2O3 can adsorb DBT from oil phase quickly, and then desorb it and transfer it to R-8 cells for biodegradation, thus increasing desulfurization rate. It is also found that nano-sized γ-Al2O3 increases desulfurization rate more than regular-sized γ-Al2O3. Therefore, nano- γ-Al2O3 is regarded as the better adsorbent for this in-situ coupling desulfurization technology. | ZHANG HuaiYing LIU QingFen LI YuGuang LI WangLiang XIONG XiaoChao XING JianMin LIU HuiZhou | 2008 | Science China Chemistry2008，51，1： | 2 |
| 8 | Effect of Nano Al Pigment on the Anticorrosive Performance of Waterborne Epoxy Coatings显示文摘This paper presents the results regarding the effect of nano aluminum powder pigment concentration on the protective properties of waterborne epoxy films in 3.5 wt pct NaCl solution.The anticorrosive performance of the coatings with 0.5,1,and 3 wt pct pigments and none pigment were investigated using electrochemical impedance spectroscopy (EIS),scanning electron microscopy (SEM) and Raman spectroscopy techniques. The results show that adding appropriate amount of nano-aluminium powder pigment can enhance the barrier properties of the epoxy coating,which is attributed to the surface effect of nanoparticles and the compatibility of the pigment with the waterborne epoxy coatings. | Lili XUE Likun XU Qingfen LI | 2007 | Journal of Materials Science & Technology2007，23，4： | 1 |
| 9 | Aquifer thermal energy storage: A numerical simulation of field experiments in China显示文摘 | Xie Chunhong Li Qingfen | 1990 | Water Resource Research1990，26，10： | 1 |
| 10 | Electroless Ni-P plating with a phytic acid pretreatment on AZ91D magnesium alloy显示文摘 | Cui Xiufang Jin Guo Li Qingfen | 2010 | Materials Chemistry and Physics2010，121，12： | 1 |
| 11 | Aqueous dispersion polymerization of acrylamide with quaternary ammonium cationic comonomer显示文摘 | Wu Yumin Chen Qingfen Xu Jun | 2008 | J Appl Polym Sci2008，108，： | 1 |
| 12 | An experimental study on damage of retina function due to toxicity of carbon disulfide and lipid peroxidation显示文摘 | Qingfen T Xirang G Weijing Y | 1999 | Acta Ophthalmol Stand1999，77，3： | 1 |
| 13 | Microstructure and corrosion resistance of physic acid conversion coatings for magnesium alloy显示文摘 | CUI Hufang LI Qingfen LI Ying | 2008 | Appl surf sci2008，254，： | 1 |
| 14 | Experimental Studyon Non-Equilibrium Grain-Boundary Segregation Kinetics ofPhosphorus in an Industrial Steel 显示文摘 | Li Qingfen Yang Shanglin Li Li | 2002 | Scripta Mater2002，47，6： | 1 |
| 15 | Uncoupling protein 1 mRNA, mitoehondrial GTP-binding, and T4 5'-deiodinase of brown adipose tissue in euthermic Daurian ground squirrel during cold exposure显示文摘 | LIU Xiaotuan LI Qingfen LIN Qishui | 2001 | Comp Biochem Physiol A2001，128，4： | 1 |
| 16 | Electroless Ni–P plating with a phytic acid pretreatment on AZ91D magnesium alloy显示文摘 | Xiufang Cui Guo Jin Qingfen Li Yuyun Yang Ying Li Fuhui Wang | 2010 | Materials Chemistry and Physics2010，，1： | 1 |
| 17 | Aquifer thermal energy storage:A numerical simulation of field experiments in China显示文摘 | Xue Yuqun Xie Chunhong Li Qingfen | 1990 | Water Resources Research1990，26，10： | 1 |
| 18 | Electroless Ni-P plating with a phytic acid pretreatment on AZ91 D magnesium alloy 显示文摘 | XIUFANG Cui GUO Jin QINGFEN Li | 2010 | Materials Chemistry and Physics2010，121，： | 1 |
| 19 | Corrosion behaviors in physiological solution of cerium conversion coatings on AZ31 magnesium alloy显示文摘 | Xiufang Cui Yuyun Yang Erbao Liu Guo Jin Jinggao Zhong Qingfen Li | 2011 | Applied Surface Science2011，，23： | 1 |
| 20 | Electrochemical Deposition of Aluminum from NaCl - AlCl3 Melts 显示文摘 | Li Qingfen Hjuler H A | 1990 | J Electro - chem Soc1990，137，2： | 1 |
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