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排序方式: 共有80条查询结果,搜索用时 31 毫秒
11.
Abbott T Akiba Y Beavis D Bloomer MA Bond PD Chasman C Chen Z Chu YY Cole BA Costales JB Crawford HJ Cumming JB Debbe R Engelage J Fung SY Grodzins L Gushue S Hamagaki H Hansen O Hayano RS Hayashi S Homma S Huang HZ Ikeda Y Juricic I Kang J Katcoff S Kaufman S Kimura K Kitamura K Kurita K Ledoux RJ Levine MJ Miake Y Morse RJ Moskowitz B Nagamiya S Olness J Parsons CG Remsberg LP Sakurai H Sarabura M Shor A Stankus P Steadman SG Stephans GS Sugitate T Tanaka M Tannenbaum MJ Torikoshi M 《Physical review letters》1991,66(12):1567-1570
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G. Michael Blackburn Andrew S. Cumming Graham E. Taylor 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract We have previously established that the α-fluorination of alkanephosphonates provides analogues of phosphate esters which have improved ‘isopolarity’ relative to simple alkanephosphonates.1 This property is manifest, inter alia, in enhanced acidity and in the upfield shift for the 31P n.m.r. resonance. Indeed, for a range of halomethanephosphonic acids we have found the relationship “δP=9.61 (pKa2 - 4.59) ppm” gives an excellent correlation between these parameters. In this context, the properties of CF2CIPO(OR)2 species, derived from the Michaelis-Becker reaction of dialkyl phosphonates with Freon 22, CF2Cl2, will be described. 相似文献
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Xin Hu Gaiqi Xu Long Wen Huacun Wang Yuncheng Zhao Yaxin Zhang David R. S. Cumming Qin Chen 《Laser \u0026amp; Photonics Reviews》2016,10(6):962-969
Spatial overlap between the electromagnetic fields and the analytes is a key factor for strong light‐matter interaction leading to high sensitivity for label‐free refractive index sensing. Usually, the overlap and therefore the sensitivity are limited by either the localized near field of plasmonic antennas or the decayed resonant mode outside the cavity applied to monitor the refractive index variation. In this paper, by constructing a metal microstructure array‐dielectric‐metal (MDM) structure, a novel metamaterial absorber integrated microfluidic (MAIM) sensor is proposed and demonstrated in terahertz (THz) range, where the dielectric layer of the MDM structure is hollow and acts as the microfluidic channel. Tuning the electromagnetic parameters of metamaterial absorber, greatly confined electromagnetic fields can be obtained in the channel resulting in significantly enhanced interaction between the analytes and the THz wave. A high sensitivity of 3.5 THz/RIU is predicted. The experimental results of devices working around 1 THz agree with the simulation ones well. The proposed idea to integrate metamaterial and microfluid with a large light‐matter interaction can be extended to other frequency regions and has promising applications in matter detection and biosensing.
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Simple Zeros of the Riemann Zeta-Function 总被引:1,自引:0,他引:1
Assuming the Riemann Hypothesis, Montgomery showed by meansof his pair correlation method that at least two-thirds of thezeros of Riemann's zeta-function are simple. Later he and Taylorimproved this to 67.25 percent and, more recently, Cheer andGoldston increased the percentage to 67.2753. Here we proveby a new method that if the Riemann and Generalized LindelöofHypotheses hold, then at least 70.3704 percent of the zerosare simple and at least 84.5679 percent are distinct. Our methoduses mean value estimates for various functions defined by Dirichletseries sampled at the zeros of the Riemann zeta-function. 1991Mathematics Subject Classification: 11M26. 相似文献
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This paper concerns a Markov operator T on a space L1, and aMarkov process P which defines a Markov operator on a spaceM of finite signed measures. For T, the paper presents necessaryand sufficient conditions for:
- a the existence of invariant probabilitydensities (IPDs)
- b the existence of strictly positive IPDs,and
- c the existence and uniqueness of IPDs.
- b the existence of strictly positive IPDs,and
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Ohne Zusammenfassung 相似文献
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应用新发展的单一轨迹积分方法求解库仑加线性位的基态量子波函数,得到基态能量和波函数的一般解析表达式,并讨论了解的收敛性.应用此方法讨论了重夸克偶素系统. 相似文献