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| 1 | Mineralogical characteristics of airborne particles collected in Beijing during a severe Asian dust storm period in spring 2002显示文摘Asian dust storm (ADS) samples were collected on March 20,2002 in Beijing,China. High-resolution field emission scanning electron microscopy with energy dispersive X-ray detector (FESEM-EDX) and X-ray diffraction (XRD) were used to study the morphology,chemical compositions,number-size dis-tributions and mineralogical compositions of ADS particles. The mineral particles were major compo-nents in the ADS samples,accounting for 94% by number. The XRD analysis indicated that the dust particles were dominated by clay (40.3%),and quartz (19.5%),followed by plagioclase (8.4%),calcite (7.5%),K-feldspar (1.5%),hematite (0.9%),pyrite (0.9%),hornblende (0.4%) and gypsum (0.3%),with a certain amount of noncrystalline materials (20.3%). Clay minerals were mainly illite/smectite mixed lay-ers (78%),followed by illite (9%),kaolinite (6%),and chlorite (7%). In addition to these main minerals,FESEM-EDX also detected some trace minerals,such as dolomite,pyrite,thenardite,as well as heavy minerals represented by rutile,ilmenite and apatite. The mineralogical compositions of the 2002-03-20 Asian dust storm and the Saharan dust plumes were similar but the clay mineralogy showed a great distinction,with the illite/smectite mixed layers being common in the Asian dust storm but illite being common in the Saharan dust plumes. | SHAO LongYi LI WeiJun YANG ShuShen SHI ZongBo LÜ SenLin | 2007 | Science China Earth Sciences2007，50，6： | 11 |
| 2 | Back-propagation network improved by conjugate gradient based on genetic algorithm in QSAR study on endocrine disrupting chemicals显示文摘Since the complexity and structural diversity of man-made compounds are considered, quantitative structure-activity relationships (QSARs)-based fast screening approaches are urgently needed for the assessment of the potential risk of endocrine disrupting chemicals (EDCs). The artificial neural net-works (ANN) are capable of recognizing highly nonlinear relationships, so it will have a bright applica-tion prospect in building high-quality QSAR models. As a popular supervised training algorithm in ANN, back-propagation (BP) converges slowly and immerses in vibration frequently. In this paper, a research strategy that BP neural network was improved by conjugate gradient (CG) algorithm with a variable selection method based on genetic algorithm was applied to investigate the QSAR of EDCs. This re-sulted in a robust and highly predictive ANN model with R2 of 0.845 for the training set, q2pred of 0.81 and root-mean-square error (RMSE) of 0.688 for the test set. The result shows that our method can provide a feasible and practical tool for the rapid screening of the estrogen activity of organic compounds. | JI Li WANG XiaoDong YANG XuShu LIU ShuShen WANG LianSheng | 2008 | Chinese Science Bulletin2008，53，1： | 6 |
| 3 | Associations between particle physicochemical characteristics and oxidative capacity: An indoor PM 10 study in Beijing, China显示文摘 | Longyi Shao Jinjuan Li Houyin Zhao Shushen Yang Hui Li Weijun Li Tim Jones Keith Sexton Kelly BéruBé | 2007 | Atmospheric Environment2007，，26： | 2 |
| 4 | QSAR Study of steroid benchmark and dipeptides based on MEDV-13显示文摘 | LIU Shushen YIN Chunsheng LI Zhiliang | 2001 | Journal of Chemical Information and Computer Sciences2001，41，2： | 1 |
| 5 | Electronic structures of N quantum dot molecule显示文摘 | Li Shushen Xia Jianbai | 2007 | Appl Phys Lett2007，91，09： | 1 |
| 6 | Electronic states of InAs/ GaAs quantum ring显示文摘 | Li Shushen Xia Jianbai | 2001 | J Appl Phys2001，89，6： | 1 |
| 7 | Electronic states of InAs/ GaAs quantum ring 显示文摘 | Li Shushen Xia Jianbai | 2001 | Journal of Applied Physics2001，89，6： | 1 |
| 8 | Quantum Computing显示文摘 | Li Shushen Long Guilu Bai Fengshan | 2001 | PNAS2001，98，11： | 1 |
| 9 | QSAR study of steroid benchmark and dipeptides based on MEDV-13 显示文摘 | Liu Shushen Yin Chunsheng Li Zhiliang | 2001 | Journal of Chemical Information and Computer Sciences2001，41，2： | 1 |
| 10 | Electronic structure and binding energy of a hydrogenic impurity in a hierarchically self-assembled GaAs/AlxGa1-x As quantum dot显示文摘 | Li Shushen Xia Jianbai | 2006 | J Appl Phys2006，100，8： | 1 |
| 11 | QSAR study of steroid benelamark and dipeptides based on MEDV-13 显示文摘 | Liu Shushen Yin Chunsheng Li Zhiliang | 2001 | J Chem Inf Comput Sei2001，41，2： | 1 |
| 12 | Magnetic Coupling Properties of Rare-Earth Metals (Gd, Nd) Doped ZnO: First-Principles Calculations显示文摘 | Hongliang Shi Ping Zhang Shushen Li | 2009 | Journal of Applied Physics2009，106，02： | 1 |
| 13 | QSAR Study of Steroid Benchmark and Dipeptides Based on MEDV-13显示文摘 | LIU Shushen YIN Chunsheng LI Zhiliang | 2001 | J Chem Inf Comput Sci2001，41，： | 1 |
| 14 | QSAR study of steroid benchmark and dipeptides based on MEDV-13 显示文摘 | Liu Shushen Yin Chunsheng Li Zhiliang | 2001 | J Chem Inf Comput Sci2001，41，2： | 1 |
| 15 | QSAR study of steroid benchmark and dipeptides based on MEDV-13 显示文摘 | LIU Shushen YIN Chunsheng LI Zhiliang | 2001 | Journal of Chemical Information and Computer Sciences2001，41，2： | 1 |
| 16 | Effective mass theory for GaAs/GaAlAs quantum wires and corrugated superlattiees grown on (311)-oriented substrates显示文摘 | Li Shushen Xia Jianbai | 1994 | Physical review B1994，50，12： | 1 |
| 17 | Status of and trends in development for cleaner production and the cleaner production audit in China 显示文摘 | LI Zhidong ZHANG Yun ZHANG Shushen | 2011 | Environmental Fo- rensics2011，12，4： | 1 |
| 18 | Effective-mass theory for InAs/GaAs strained coupled quantum dots显示文摘 | Li Shushen Xia Jianbai Yuan Z | 1996 | Physical review B1996，54，11： | 1 |
| 19 | Quantuna computing显示文摘 | Li Shushen Long Guilu Bai Fengshan | 2001 | Proc Nat Acad Sci2001，98，11： | 1 |
| 20 | Intraband optical absorption in semiconductor coupled quantum dots显示文摘 | Li Shushen Xia Jianbai | 1997 | Physical review B1997，55，15： | 1 |
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