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| 1 | OPTICAL PROPERTIES OF GeO_2 AND Ge NANOCRYSTALS显示文摘he co m pound m aterial of n m size particles Ge O2 Si O2 w as synthesied through hydrolysis of Si( O C2 H4) and Ge Cl4 . A heat treatm ent w as carried out for the sa m ples at 100 ~1200 ℃in air . Its optical property w as deter mined by U V Vis spectur m . We have found that theabsorption edge of spectru m shifted progressively to longer w avelengths . The quantu m size ef fect of nanocrystals appears because crystals gro w and energy of optical band gap reduces d ueto the influence of te m perature . By the analysis of X ray diffraction w e have observed theprocess in w hich the structure of particles changed fro m disorder into order . | Y.H.Zhou 1) ,Y.Y.Feng 2) and H.Y.Lu 2) 1)Department of Physics Nanjing Normal University, Nanjing 210097,China 2)Physics and Ch寁O P T I C A L P R O P E R T I E S O F Ge O2 A N D Ge N A N O C R Y S T A L S Y. H. Zhou1) , Y. Y. Feng2) | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 22 |
| 2 | ENSO signals and their spatial-temporal variation characteristics recorded by the sea-level changes in the northwest Pacific margin during 1965-2005显示文摘Sea-level is closely linked to the Earth's climate and its change is important as a metric for global and regional climate change. Identifying, extracting, and revealing such information through detailed analysis is the prerequisite for understanding the mechanisms of sea-level change. The monthlyaverage tide-change records reported and examined in this paper are from 10 tide gauge stations distributed in the northwest margin of the Pacific Ocean, registered during the period 1965-2005. In particular, we have utilized the Second Order Blind Identification (SOBI) method to identify and the Empirical Mode Decomposition (EMD) method to extract the El Nio-Southern Oscillation (ENSO) signals imprinted in those tide gauge records; and subsequently, we have investigated the spa-tial-temporal characteristics of the extracted ENSO signals using wavelet analysis methods. The following results are obtained: (1) the ENSO events recorded by each tide gauge series are of different types and intensity, which show considerable temporal-spatial variation characteristics, with sea-level responses to ENSO signals remarkably stronger in low latitude areas than in medium-high latitude areas; (2) due to the influences of ocean currents, topographical conditions, and other factors, there exist variations in the type of relationship between the sea-level changes and the recorded ENSO events at different latitudes; (3) sea-level changes can also denote scale-variation characteristics of ENSO events, and particularly, since 1980s, all the tide gauges located south of Kanmen show intense responses to ENSO and the timescale of ENSO events extended gradually from around 4 years to 2-8 years, reflecting variations in the intensity and frequency of ENSO events; and (4) reverse changes of certain scale were noted before and after strong ENSO events recorded by sea-level changes, supporting the research findings about the interaction (mutual coupling and superimposition) between the probability of occurrence of strong ENSO events and their time scale. | YUAN LinWang,YU ZhaoYuan,XIE ZhiRen,SONG ZhiYao & Lü GuoNian School of Geographical Science,Nanjing Normal University,Nanjing 210046,China | 2009 | Science China Earth Sciences2009，52，6： | 14 |
| 3 | Note on the number of integral ideals in Galois extensions显示文摘Let K be an algebraic number field of finite degree over the rational filed Q.Let ak be the number of integral ideals in K with norm k.In this paper we study the l-th integral power sum of ak,i.e.,∑k≤ x akl(l = 2,3,...).We are able to improve the classical result of Chandrasekharan and Good.As an application we consider the number of solutions of polynomial congruences. | L GuangShi1,& WANG YongHui2 1School of Mathematics,Shandong University,Jinan 250100,China 2Department of Mathematics,Capital Normal University,Beijing 100048,China | 2010 | Science China Mathematics2010，53，9： | 5 |
| 4 | On the generalized Busemann-Petty problem显示文摘The generalized Busemann-Petty problem asks whether the origin-symmetric convex bod- ies in R^n with a larger volume of all i-dimensional sections necessarily have a larger volume.As proved by Bourgaln and Zhang,the answer to this question is negative if i>3.The problem is still open for i=2,3.In this article we prove two specific affirmative answers to the generalized Busemann-Petty problem if the body with a smaller i-dimensional volume belongs to given classes.Our results generalize Zhang’s specific affirmative answer to the generalized Busemann-Petty problem. | Song-jun L~(1,2+) Gang-song LENG~1 1.College of Mathematics and Computer Science,Chongqing Normal University,Chongqin 400047,China 2.Department of Mathematics,Shanghai University,Shanghai 200444,China | 2007 | Science China Mathematics2007，50，8： | 5 |
| 5 | Grassland Degradation and Its Control in Region AroundQinghai Lake显示文摘A quite severe degradation was found in all seven types of grasslands in the study area involving 12counties of the northwestern Qinghai Province. The slightly, moderately and severely degraded grasslandsoccupied 49.7%, 32.0% and 18.3% of the area respectively. The major factors resulting in the degradationwere overgrazing, the damages from mice and grasshopper and blown sands, and improper use of grasslands.The measures to deal with these problems should be: 1) to make livestock development in accordancewith grassland carrying capacity for animals; 2) to build more artificial grasslands with a stable and highergraas yield; 3) to put more widely the rotation grazing system into practice; 4) to clear up the poisonousgrass species; and 5) to adopt more effective measures to deal with the damages to grasslands by mice andgrasshoppers. | JIANG JIANJUN NI SHAOXIANG GONG AIQI WANG WEIJUN ZHA YONG WANG JIECHENG F. VOSS(l College of Geographic Science, Nanjing Normal University, Nanjing 210097 (China))(2 General Grassland Station of Qinghai Province, Xining 810001 (China))(3 Institute of Ceog | 1999 | Pedosphere1999，9，4： | 4 |
| 6 | Suspended sediment flux of river:Wavelet analysis in the Panlong basin of the Upper Red River (Honghe River),China显示文摘这份报纸把小浪分析用于检验变化趋势,多时间规模变化,在上面的红河的 Panlong 盆的推迟的沉积流动(SSF ) 的周期、突然的变化特征,中国。结果显示 SSF 从 1951 ~ 1997 增加了,但是自从 1998,衰退了。SSF 的变化把多时间规模特征和变化在不同时间时期改变了。三周期的时间规模, 4, 7 和 22 年,被决定。22 年的周期的时间规模,是在三次规模之中的最明显的,通过整个研究时期延长了,而第 4-a 7 年的时间规模在某些时间时期仅仅是明显的。分别地有 27 次越过 4 年的时间规模,越过 7 年的时间规模的 16 次和越过 22 年的时间规模的 5 次的突然的变化。根据统计的聚会和气候数据分析,我们断定人的活动是导致了多时间规模的 SSF,而是特征的变化趋势的主要原因,周期、突然的变化被气候变化主要影响。 | DING WenRong~(1,2+) ZHOU Yue~(1,3) L XiXi~4 1 The Faculty of Environment Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China 2 College of Tourism and Geography Science,Yunnan Normal University,Kunming 650092,China 3 Yunnan University of Finance and Economics,Kunming 650221,China 4 Department of Geography,National University of Singapore 119260,Singapore | 2007 | Chinese Science Bulletin2007，52，A02： | 4 |
| 7 | A mechanism for enhanced photocatalytic activity of nano-size silver particle modified titanium dioxide thin films显示文摘Ag-TiO2 nanostructured thin films with silver volume fraction of 0–20% were deposited on silicon and quartz substrates by RF magnetron sputtering and annealed in ambient air at 950°C for 1 h. The phase structure and surface topography of the films were characterized by X-ray diffractometer and transmission electron microscope. Photocatalytic activity of the films was evaluated by light induced degradation of methyl orange (C14H14N3NaO3S) solution using a high pressure mercury lamp as lamp-house. The relation of photocatalytic activity and silver content was studied in detail. It was found that silver content influences phase structure of TiO2 thin films, and silver in the films is metallic Ag (Ag0). With increasing silver content from 0 to 20 vol%, photocatalytic activity of the films increases first and then decreases. A suitable amount (2.5–5 vol%) silver addition can significantly enhance the photocatalytic activity of TiO2 films. The enhanced photocatalytic activity was mainly attributed to the extension of visible light absorption region of the films, the presence of anatase phase, the increase of oxy-gen anion radicals O2? and reactive center of surface Ti3+, and the better separation between electrons and holes on the films surface. | MENG FanMing1,2,3*, LU Fei1,3, SUN ZhaoQi1,3 & Lü JianGuo1,2,4 1 School of Physics and Materials Science, Anhui University, Hefei 230039, China 2 Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Dalian University of Technology), Ministry of Education, Dalian 116024, China 3 Anhui Key Laboratory of Information Materials and Devices, Anhui University, Hefei 230039, China 4 Department of Physics and Electronic Engineering, Hefei Normal University, Hefei 230061, China | 2010 | Science China(Technological Sciences)2010，53，11： | 4 |
| 8 | A Possible Long-tailed Bird with a Pygostyle from the Late Mesozoic Yixian Formation, Western Liaoning, China显示文摘An incomplete caudal vertebral series (IVPP V11309) from the Yixian Formation of late Mesozoic, Jianshangou area of Beipiao, western Liaoning Province, may represent a new bird. The tail is composed of at least 12 free caudal vertebrae and the most distal 5 caudal vertebrae co-ossified into a pygostyle. The pygostyle is plate-like and slightly curved dorsally. The anterior free caudals are amphiplatyan. The anterior caudal surfaces of the last three free caudals are concave, but their posterior articular surfaces are convex. The pygostyle is regarded as the first appeared flight apparatus during the evolutionary process from Archaeopteryx to neornithes. The pygostyle appeared in most early fossil birds and almost all the modern birds. Although their morphologies are different, they are basically formed by at least four last caudal vertebrae. The specimen V11309 is regarded as a bird rather than a non-avian theropod dinosaur based on the following characters: short caudal vertebrae, numerous pits present on the surfaces of the centra and, a foramen present between the basal part of the fused neural spines, which is similar to that of Struthio camelus. The discoveries of pygostyles from the therizinosauroids and oviraptorosaurs may provide strong evidence for supporting the origin of birds from small theropod dinosaurs. The structure of the pygostyle in specimen V11309 is different from those of Beipiaosaurus (Therizinosauroid) and Nomingia (oviraptorosaur). The most parsimonious interpretation is that these pygostyle-like structures are independently acquired by Beipiaosaurus and Nomingia during their evolutionary process. | L Junchang1 and HOU Lianhai2 1 Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 2 Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044 Department of Biology, Capital Normal University, Beijing 100037 | 2005 | Acta Geologica Sinica(English Edition)2005，79，1： | 3 |
| 9 | Normal histology of the prostate 显示文摘 | McNcal JE Hugosson J Normal L | 1988 | Am J Surg Path1988，12，4： | 1 |
| 10 | Users显示文摘 | Hritz I Herszenyi L Molnar B et aL Proton pump inhibitor co-therapy normalizes the increased cell turnover of the gastric mucosa both in NSAID and selective COX-? | 2005 | Int J Immunopathol Pharmacol2005，18，1： | 1 |
| 11 | A case report显示文摘 | Singer F Bhargava G Poretsky L Persistent insulin resistance after normalization of androgen levels in a woman with congenital adrenal hyperplasia | 1989 | J Reprod Med1989，34，11： | 1 |
| 12 | Growth differentiation factor 9 and bone morphogenetic protein 15 are essential for ovarian follicular development in sheep显示文摘 | JENNIFER L J NORMAL H DEREK A H | 2002 | Biol Reprod2002，67，： | 1 |
| 13 | 显示文摘 | Walker L Chang LC Nayak A Diffusion Tensor Imaging of the component of the NIH MR! sytudy of normal brain development ( Ped s DTI ) | 2016 | Neuroimage2016，124，： | 1 |
| 14 | Normal histology of the prostate显示文摘 | McNeal JE Hugosan J Normal L | 1988 | Am J Surg Pathol1988，12，8： | 1 |
| 15 | Spectral anomalies and spectral switches of partially coherent and polychromatic light diffracted at an aperture显示文摘Based on the propagation theory of partially coherent light in the space-frequency domain, the anomalous spectral behavior and spectral switches in the far field of partially coherent and polychromatic light diffracted at an aperture are studied. It is shown that, as compared with spatially fully coherent and polychromatic light whose spectral anomalies are induced only by aperture diffraction, the spectral anomalies and spectral switches of partially coherent and polychromatic light depend on the aperture diffraction, spatial correlation b and bandwidth of the original spectrum. Detailed numerical calculations are made to illustrate the behavior of spectral switches of partially coherent and polychromatic light, and the results for spatially fully coherent and polychromatic light are treated as a special case of b =1 and included in our theory. | Lü Baida1, 3 & PAN Liuzhan1, 2 1. Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064, China 2. Department of Physics, Luoyang Normal College, Luoyang 471022, China 3. State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China Correspondence should be addressed to L Baida (email: badalu@scu.edu.cn) Received July 10, 2003 | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，1： | 1 |
| 16 | Process Capability Indices:A Review 1992-2000显示文摘 | Samuel Kotz Johnson Normal L | 2002 | Journal of Quality Technology2002，34，1： | 1 |
| 17 | moveout front dipping reflectors in anisotropic media显示文摘 | Tsvankin L Normal | 1995 | Geophysics1995，60，1： | 1 |
| 18 | Time-offlight secondary ion mass spectrometry studies of hydrolytic degradation kinetics at the surface of poly(glycolic acid)显示文摘 | Joo-Woon Lee Normal L | 2000 | Macromolecules2000，33，： | 1 |
| 19 | TiO_2@MgO Core-Shell Film:Fabrication and Application to Dye-Sensitized Solar Cells显示文摘In this study,TiO2@MgO core-shell film was obtained by using a simple chemical bath deposition method to coat a thin MgO film around TiO2 nanoparticles. The core-shell configuration was characterized by X-ray diffractometer (XRD),scanning elec-tron microscopy (SEM),energy dispersive X-ray spectroscopy (EDX),and high-resolution transmission electron microscopy (HRTEM). Lattice fringes were observed for the TiO2 particles,and the MgO shell showed an amorphous structure,revealing a clear distinction between the core and shell materials. Applying the core-shell film as photoanode to the dye-sensitized solar cells (DSSCs),it shows a superior performance compared to the pure TiO2 electrode. Under the illumination of simulated sunlight (75 mW-cm-2),the short circuit photocurrent (Jsc),the open circuit photovoltage (Voc),and the fill factor (fF) are 8.80 mA-cm-2,646 mV,and 0.69,respectively,and the conversion efficiency (η) in-creased by 21.8% (from 4.32% to 5.26%) when dipping for opti-mum condition. | LI Bihui, Lü Gang, LUO Lijuan, TANG Yiwen Institute of Nano-Science and Technology, Huazhong Normal University, Wuhan 430079, Hubei, China | 2010 | Wuhan University Journal of Natural Sciences2010，15，4： | 1 |
| 20 | Estimation of suspended sediment concentration based on bio-optical mechanism and HJ-1 image in Chaohu Lake显示文摘Synchronization experiment was conducted in June,2009 to get Inherent Optical Properties(IOP) of water component in Chaohu Lake.Water bio-optical mechanism was studied combined with multispectral data of Environmental Satellite 1(CCD),and then inversion models of total suspended matter(TSM),inorganic suspended matter(ISM) and organic suspended matter(OSM) concentration were built.The data indicated that:the absorption ratio of suspended particulate matter and CDOM to total were almost no change from band 1 to band 2 with about 85% and 9%,respectively.The ratio of pure water to total increased from 0.4% to 5.6%.Water reflectance in these two bands were influenced by absorption of three kinds of components:algae particles absorption surpassed non-algal particles in band 3,and so played an important role in total absorption with about 35.7%;the proportion of pure water absorption and particles matter backscattering both were 99% in band 4,so these two components decided the main inherent optical properties in band 4.The models of TSM and ISM concentration inversion based on band combination(band 3 + band 4)/(band 1 + band 2) were built,while OSM concentration was estimated by band 4/(band 1 + band 2) index.Inversed by image data,RE of TSM concentration between modeled and measured was 33.4%,and RMSE was 18.68 mg/L.RE of ISM and OSM concentration were 39.9% and 35.2% respectively.The inversion was more accurate when satellite-ground data were just in the same day.At this situation,RE of ISM concentration dropped to 25.4%,and that of TSM and OSM reduced to 26.5% and 26.8% as well. | WANG Qiao1,2,JIN Xin2,LI YunMei2,WU ChuanQing1,Lü Heng2,WANG YanFei2,ZHANG Hong2,YIN Bin2 & ZHU Li1 1Satellite Environment Center,Ministry of Environmental Protection,Beijing 100029,China 2Key Laboratory of Virtual Geographic Environment of Education Ministry,Nanjing Normal University,Nanjing 210046,China | 2010 | Science China Earth Sciences2010，53，S1： | 1 |
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