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| 1 | Geological Characteristics of the Furong Tin Orefield, Hunan,^(40)Ar-^(39)Ar Dating of Tin Ores and Related Granite and Its Geodynamic Significance for Rock and Ore Formation显示文摘Furong, Hunan, is a large tin orefield discovered in China in recent years, which is mainly of the skarn-greisenchlorite type. On the basis of the geological characteristics of the orefield, 40Ar-39Ar dating was performed on muscovite from greisen-type tin ore and biotite from related amphibole-biotite granite, which yielded three sets of age data, i.e., a plateau age of 157.5±0.3 Ma and an i sochron age of 156.9±3 Ma for amphibole-biotite granite; a plateau age of 156.1 ±0.4Ma and an isochron age of 155.7±1.7 Ma for the Sanmen greisen-type tin ore; and a plateau age of 160.1±0.9 Ma and an isochron age of 157.5±1.5 Ma for the Taoxiwo greisen-type tin ore. The three sets of age data coincide well with each other They not only accurately reflect the timing of rock and ore formation but also indicate close relations between granite and tin deposits. In addition, the plateau ages of all three sets suggest that no subsequent thermal perturbation event occurred after the formation of granite and tin deposits. The Furong tin orefield is a component part of the southern Hunan large tungsten-tin polymetallic deposit concentration area and also a representative deposit formed in the time interval of 160-135 Ma in four peaks of Mesozoic tungsten-tin mineralization in the South China region. They might still correspond to the middle and late stages of the major geodynamic transition from a N-S- to an E-W-direction in eastern China. | MAOJingwen LIXiaofeng CHENWen LANXiaoming WEIShaoliu | 2004 | Acta Geologica Sinica(English Edition)2004，78，2： | 13 |
| 2 | Synthesis of a new meso/microporous composite molecular sieve of MCM-41/mordenite显示文摘An MCM-41/mordenite composite with two- fold porous structure and stepwise-distributed acidity was prepared for the first time by using zeolite mordenite as the silica-alumina source. The composite molecular sieve has been investigated and compared with a mechanical mixture of mordenite and MCM-41 for their structure, acidity and catalytic activity by means of XRD, N2 adsorption and desorption, HRTEM, DTG, NH3-TPD and catalytic reaction. The characterization results show that the structure and property of the composite molecular sieve are quite different from those of the mechanical mixture, which might be ascribed to the incorporation of secondary building units characteristic of zeolite mordenite into the mesoporous walls of the composite which gives rise to the thicker mesoporous walls, the higher hydrothermal stability and more strong acid sites. Furthermore, the new strategy could be used as a new general method for the preparation of catalysts for the reaction system with multifold large molecules, and the results were well confirmed by the dealkylation of C10+ aromatic hydrocarbon. | WANGShan DOUTao LIYuping ZHANGYing YANZichun LIXiaofeng | 2005 | Chinese Science Bulletin2005，50，12： | 6 |
| 3 | One-stepsynthesisofP-HZSM-5zeoliteanditscatalyticperformanceinMTPreaction[J]显示文摘 | ZhangHairong(张海荣) ZhangQing(张卿) LiYuping(李玉平) ZhangPengfei(张鹏飞) PanRuili(潘瑞丽) LiXiaofeng(李晓峰) DouTao(窦涛) | | J燃料化学学报0，，： | 1 |
| 4 | 聚酰亚胺改性酚醛泡沫[J]显示文摘 | ZhangYingjie(张英杰) LiXiaofeng(李晓峰) | | 高分子学报0，，： | 1 |
| 5 | StudyonRb2Te(Cs)solarblindultravioletcathode显示文摘 | LiXiaofeng | 2013 | InfraredTechnology2013，，35： | 1 |
| 6 | Synergisticef- fect of boron nitride flakes and tetrapod-shaped ZnO whiskerson the thermal conductivity of electrically insulating phenol formaldehyde composites显示文摘 | YuanFangyuan ZhangHaobin LiXiaofeng | 2013 | Composites Part A:Applied Sci- ence and Manufacturing2013，53，： | 1 |
| 7 | ADAPTIVE RECONSTRUCTION TECHNIQUE FOR THE LOST INFORMATION OF THE RECTANGULAR IMAGE AREA显示文摘The adaptive reconstruction for the lost information of the rectangular image area is very important for the robust transmission and restoration of the image. In this paper, a new reconstruction method based on the Discrete Cosine Transform (DCT) domain has been put forward. According to the low pass character of the human visual system and the energy distribution of the DCT coefficients on the rectangular boundary, the DCT coefficients of the rectangular image area are adaptively selected and recovered. After the Inverse Discrete Cosine Transform (IDCT), the lost information of the rectangular image area can be reconstructed. The experiments have demonstrated that the subjective and objective qualities of the reconstructed images are enhanced greatly than before. | ShiRong LiXiaofeng LiZaiming | 2004 | Journal of Electronics(China)2004，21，2： | 0 |
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