Improvement in the calculation of anti-Stokes energy transfer and experimental justification based on Er_0.01Yb_xY_{1 - 0.01 - x}VO₄ crystal     

陈晓波  卢建  张蕴芝  徐小灵  冯宝华  王策  Gregory J. Salamo  杨国建 《海洋学报(英文版)》2010,29(9)

The improvement on the calculation of anti-Stokes energy transfer rate is studied in the present work. The additional proportion coefficient between Stokes and anti-Stokes light intensities of quantum Raman scattering theory as compared with the classical Raman theory is introduced to successfully describe the anti-Stokes energy transfer. The theoretical formula for the improvement on the calculation of anti-Stokes energy transfer rate is derived for the first time in this study. The correctness of introducing coefficient exp{ΔE / kT} from well-known Raman scatter theory is demonstrated also. Moreover, the experimental lifetime measurement in Er_0.01Yb_xY_{1 - 0.01 - x}VO₄ crystal is performed to justify the validity of our important improvement in the original phonon-assisted energy transfer theory for the first time.  相似文献   

Structural, curvature and electronic properties of Rh adsorption on armchair single-walled carbon nanotube     

杨培芳  吴锋民  滕波涛  刘莎  蒋健中 《海洋学报(英文版)》2010,29(9)

This paper systematically studies the rolling effects of the (n, n) single-wall carbon nanotubes (SWCNT) with different curvatures on Rh adsorption behaviours by using density functional theory. The outside charge densities of SWCNTs are found to be higher than those inside, and the differences decrease with the increase of the tube radius. This electronic property led to the discovery that the outside adsorption energies are higher than the inside ones, and that the differences are reduced with the increase of the tube radius. Partial density of states and charge density difference indicate that these strong interactions induce electron transfer between Rh atoms and SWCNTs.  相似文献   

Stable ⁸⁵Rb micro vapour cells: fabrication based on anodic bonding and application in chip-scale atomic clocks     

苏娟  邓科  郭等柱  汪中  陈兢  张耿民  陈徐宗 《海洋学报(英文版)》2010,29(11)

We describe the microfabrication of ⁸⁵Rb vapour cells using a glass-silicon anodic bonding technique and in situ chemical reaction between rubidium chloride and barium azide to produce Rb. Under controlled conditions, the pure metallic Rb drops and buffer gases were obtained in the cells with a few mm³ internal volumes during the cell sealing process. At an ambient temperature of 90 ℃ the optical absorption resonance of ⁸⁵Rb D1 transition with proper broadening and the corresponding coherent population trapping (CPT) resonance, with a signal contrast of 1.5% and linewidth of about 1.7 kHz, have been detected. The sealing quality and the stability of the cells have also been demonstrated experimentally by using the helium leaking detection and the after-9-month optoelectronics measurement which shows a similar CPT signal as its original status. In addition, the physics package of chip-scale atomic clock (CSAC) based on the cell was realized. The measured frequency stability of the physics package can reach to 2.1×10^-10 at one second when the cell was heated to 100 ℃ which proved that the cell has the quality to be used in portable and battery-operated devices.  相似文献   

《中国海洋湖沼学报》(英文版)2010年第3期论文导读     

《中国海洋湖沼学报》 《海洋科学》2010,34(5):93-96

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《中国海洋湖沼学报》(英文版, SCI-E 收录) Chinese Journal of Oceanology and Limnology 2010 年第6 期论文导读     

《中国海洋湖沼学报》 《海洋科学》2010,34(11):111-113

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《海洋科学》2010年第11期目次     

《海洋科学》编辑部 《海洋科学》2010,34(11)

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《海洋科学》2010年第1期目次     

《海洋科学》编辑部《海洋科学》年第期目次 《海洋科学》2010,34(1)

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《海洋科学》2010年第6期目次     

《海洋科学》编辑部 《海洋科学》2010,34(6)

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《海洋科学》2010年第9期目次     

《海洋科学》编辑部 《海洋科学》2010,34(9)

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Study of A Geo-Acoustic Model of Gas-Bearing Sediment and Its Application in Sediment with Low Acoustic Velocity   总被引：1，自引：1，他引：0  

陶春辉  李红星  邓显明  周建平  Fu Shun-sheng  R. H. Wilkens  顾春华  何拥华 《海洋工程》2010,(2):381-390

A new geo-acoustic model for gas-bearing sediment is proposed based on the work of Dvorkin and Prasad, and Biot theory. Only five geophysical parameters: sediment mineral composition, free gas saturation, tortuosity (also known as the structure factor), permeability, and porosity, are considered in the model. A benefit of this model is that we need only five parameters instead of ten parameters in the Biot’s formulas for acoustic velocity and attenuation calculation. Here the model is demonstrated with the in-situ experimental data collected from the Hangzhou Bay, China. The results of this study suggest that free gas content in sediment is the most critical condition resulting in a low acoustic velocity (compressional wave). The respective contributions of the other four parameters in the model are also discussed.  相似文献