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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 | 美国国立老化研究所与阿尔茨海默病协会诊断指南写作组:阿尔茨海默病临床前阶段的定义显示文摘阿尔茨海默病(AD)的病理生理过程在痴呆诊断的多年前就开始了。这一长期的AD“临床前”阶段是治疗干预的关键机会,但需进一步阐明AD的病理级联过程和临床症状出现之间的联系。美国国立老化研究所和AD协会召集了一个国际工作组对AD生物标志物、流行病学和神经心理学的证据进行综述并提出建议,以确定能够预测由“正常”认知到轻度认知功能障碍(MCI)及AD痴呆的最佳预测指标。根据目前已有的主要科学证据,我们提出了一个概念性的框架和用于操作的研究标准,以通过纵向临床研究来验证和改进这些模型。这些建议仅用于研究目的,目前不涉及临床应用。我们希望这些建议能提供一个共识,以推进临床前AD的研究,最终推动更早期治疗干预的进展,使得一些疾病减缓药物的疗效发挥最大。 | Sperling RA Aisen PS Beckett LA Bennett DA Craft S Fagan AM Iwatsubo T Jack CR Jr Kaye J Montine TJ Park DC Reiman EM Rowe CC Siemers E Stern Y Yaffe K Carrillo MC Thies B Morrison-Bogorad M Wagster MV Phelps CH 贾建平(译) 郭起浩(译) 黄丽(译) 陆璐(译) 张逸驰(译) 邢怡(译) | 2012 | 中华神经科杂志2012，45，5： | 22 |
| 3 | Effect of Diffuser Vane Shape on the Performance of a Centrifugal Compressor Stage显示文摘The present paper reports the results of experimental investigations on the effect of diffuser vane shape on the performance of a centrifugal compressor stage.These studies were conducted on the chosen stage having a backward curved impeller of 500 mm tip diameter and 24.5 mm width and its design flow coefficient is Фd=0.0535.Three different low solidity diffuser vane shapes namely uncambered aerofoil,constant thickness flat plate and circular arc cambered constant thickness plate were chosen as the variants for diffuser vane shape and all the three shapes have the same thickness to chord ratio(t/c=0.1).Flow coefficient,polytropic efficiency,total head coefficient,power coefficient and static pressure recovery coefficient were chosen as the parameters for evaluating the effect of diffuser vane shape on the stage performance.The results show that there is reasonable improvement in stage efficiency and total head coefficient with the use of the chosen diffuser vane shapes as compared to conventional vaneless diffuser.It is also noticed that the aero foil shaped LSD has shown better performance when compared to flat plate and circular arc profiles.The aerofoil vane shape of the diffuser blade is seen to be tolerant over a considerable range of incidence. | T Ch Siva Reddy GV Ramana Murty MVSSSM Prasad | 2014 | Journal of Thermal Science2014，23，2： | 4 |
| 4 | Iunochemical evidence that cholesteryl ester transfer protein and bactericidal/permeability-increasing protein share a similar tertiary structure 显示文摘 | Valérie GD Viken T Vinita CH | 1999 | Protein Science1999，8，： | 3 |
| 5 | Photonic gas sensors exploiting directly the optical properties of hybrid carbon nanotube localized surface plasmon structures显示文摘Weinvestigate the modification of the optical properties of carbon nanotubes(CNTs)resulting from a chemical reaction triggered by the presence of a specific compound(gaseous carbon dioxide(CO_(2)))and show this mechanism has important consequences for chemical sensing.CNTs have attracted significant research interest because they can be functionalized for a particular chemical,yielding a specific physical response which suggests many potential applications in the fields of nanotechnology and sensing.So far,however,utilizing their optical properties for this purpose has proven to be challenging.We demonstrate the use of localized surface plasmons generated on a nanostructured thin film,resembling a large array of nano-wires,to detect changes in the optical properties of the CNTs.Chemical selectivity is demonstrated using CO_(2) in gaseous form at room temperature.The demonstrated methodology results additionally in a new,electrically passive,optical sensing configuration that opens up the possibilities of using CNTs as sensors in hazardous/explosive environments. | Thomas Allsop Raz Arif Ron Neal Kyriacos Kalli Vojtěch Kundrát Aleksey Rozhin Phil Culverhouse David J Webb | 2016 | Light(Science & Applications)2016，5，1： | 3 |
| 6 | Price drivers and structural breaks in European carbon prices 2005–2007显示文摘 | Emilie Alberola Julien Chevallier Beno??t Chèze | 2007 | Energy Policy2007，，2： | 3 |
| 7 | Circadian rhythm of photoaccumulation in Paramecium bursaria显示文摘 | Johnson CH Miwa I Kondo T | 1989 | J Biol Rhythms1989，4，： | 2 |
| 8 | Sensitivity analysis of parameters and contrasting performance of ground filtering algorithms with UAV photogrammetry-based and LiDAR point clouds显示文摘Most ground filtering algorithms are primarily designed for airborne LiDAR point cloud processing and their successful use in identifying ground points from photogrammetric point clouds remains questionable.We compared six ground filtering algorithms implemented in Metashape,ArcGIS,CloudCompare,LAStools,and PDAL.We used UAV photogrammetry-based(acquired under leaf-off conditions)and airborne LiDAR(leaf-on)point clouds of the same area to:(i)compare accuracy of generated DTMs;(ii)evaluate the effect of vegetation density and terrain slope on filtering accuracy;and(iii)assess which algorithm parameters have the greatest effect on the filtering accuracy.Our results show that the performance of filtering algorithms was affected by the point cloud type,terrain slope and vegetation cover.The results were generally better for LiDAR(RMSE 0.13–0.19 m)than for photogrammetric(RMSE 0.19–0.23 m)point clouds.The behavior in varying vegetation and terrain conditions was consistent for LiDAR point clouds.However,when applied on photogrammetric point clouds,the algorithms’behavior was inconsistent,especially in areas of steep slope(except for the Progressive Triangulated Irregular Network in LAStools).Parameters related to the selection of the initial minimum elevation ground points were the most influential in all algorithms and point clouds. | Petr Klápště Michal Fogl Vojtěch Barták Kateřina Gdulová Rudolf Urban Vítězslav Moudrý | 2020 | International Journal of Digital Earth2020，13，12： | 2 |
| 9 | Efficient detection of temporally impulsive dirt impairments in archived films 显示文摘 | J Ch Ren and T Vlachos | 2007 | Signal Processing2007，87，3： | 1 |
| 10 | Pulmonary embolism in patients with unexplained exacerbation of chronic obstructive pulmonary disesease : Prevalence and risk factors 显示文摘 | Tillie-Leblond I Marquette CH Perez T | 2006 | Ann Intern Med2006，14，6： | 1 |
| 11 | Molecular and immunological characterization of Mycobacterium tuberculosis CFP-10, an immunodiagnostic antigen missing in Mycobacterium boris BCG显示文摘 | Dillon DC Alderson MR Day CH Bement T Campos Neto A Skeiky YA Vedvick T Badaro R Reed SG Houghton R | 2000 | J Clin Microbiol2000，38，9： | 1 |
| 12 | Genetic variation in open reading frame 5 gene of porcine reproductive and respiratory syndrome virus in Taiwan显示文摘 | Wang Ch Lee F Huang T Sh | 2008 | Vet Microbiol2008，131，34： | 1 |
| 13 | Increase in thyrotoxieosis associated With iodine supplement in Zimbabwe 显示文摘 | Todd CH Allain T Gomo ZA | 1995 | Lancet1995，346，： | 1 |
| 14 | Urinary excretion of podoeytes in patienls with diabetic nephropathy显示文摘 | Nakamura T Ushiyama CH Suzuki St-I | 2000 | Nephrol Dial Transplant2000，15，： | 1 |
| 15 | Proteinuria as a modifiable risk factor for the progression of nondiabetic renal diseases显示文摘 | Jafar T H Stark P C Schm id CH etal | 2001 | Kidney Int2001，60，3： | 1 |
| 16 | Activity changes of calmodulin and Ca^2+-ATPase during low temperature-induced anthocyanin accumulation in Alternanthera betzickiana显示文摘 | WANG CH Q ZHANG Y F LIU T | 2005 | Physiologia Plantarum2005，124，： | 1 |
| 17 | Mean platelet volume and platelet distribution width in the neonate显示文摘 | Patrick CH Lazarchick J Stubbs T | 1987 | Am J Pediatr Hematol Oncol1987，9，2： | 1 |
| 18 | The anterolateral thigh perforator flap for reconstruction of knee defects 显示文摘 | Wong CH Gob T Tan BK | 2013 | Ann Plast Surg2013，70，： | 1 |
| 19 | Techniques for analy- zing frequency selective surfaces-a review 显示文摘 | MITTRA R CHAN CH CWIK T | 1988 | Proceedings of the IEEE1988，76，12： | 1 |
| 20 | Spatial and temporal changes of subchondral bone proceed to microscopic articular cartilage degeneration in guinea pigs with spontaneous osteoarthritis 显示文摘 | Wang T Wen C~ Yan CH | 2013 | Osteoarthritis Cartilage2013，21，4： | 1 |
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