机构

• 长春光学精密机械与物... [6]
• 物理研究所 [2]
• 金属研究所 [2]
• 理论物理研究所 [2]
• 福建物质结构研究所 [1]
• 高能物理研究所 [1]
• 更多

采集方式

• OAI收割 [14]

内容类型

• 期刊论文 [8]
• 会议论文 [6]

发表日期

• 2014 [1]
• 2013 [1]
• 2010 [1]
• 2009 [2]
• 2008 [2]
• 2007 [1]
• 更多

学科主题

• Physics [2]
• Chemistry [1]

筛选

浏览/检索结果: 共14条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Quantum phase transition and thermodynamic properties of a fourfold magnetic periodic system 期刊论文  OAI收割 Journal of Magnetism and Magnetic Materials, 2014, 卷号: 371, 页码: 77-81 S. L. Wang; R. X. Li; L. J. Ding; H. H. Fu; S. C. Zhu; Y. Ni; Y. Meng; K. L. Yao 收藏  |  浏览/下载：22/0  |  提交时间：2015/01/14 Thermodynamic  Magnetization plateau  Energy spectra  chain  state  s=1/2   Luminescence and energy transfer in Ca3Sc2Si 3O12:Ce3+,Mn2+ white LED phosphors (EI CONFERENCE) 会议论文  OAI收割 作者:  Luo Y.;  Zhang J.;  Zhang J.;  Zhang J.;  Wang X. 收藏  |  浏览/下载：45/0  |  提交时间：2013/03/25 Expanded emission spectra ranging from green to red are reported in Ca 3Sc2Si3O12 (CSS):Ce 3+  Mn2+ silicate garnets. Mn2+ may occupy Ca2 site (Mn2+(I)) to generate a yellow emission band at 574 nm or Sc3 site (Mn2+(II)) with red emission band at 680 nm. Efficient energy transfers from the green emitting Ce3+ to both Mn2+(I) and Mn2+(II) occur upon blue excitation into Ce3+. Concentration dependence of Mn2+ emission is analyzed based on Ce3+-Mn2+ energy transfer  steady state rate equations  and fluorescence lifetimes. Energy transfer efficiency (nT) and rate (W) are calculated with values as high as 45% and 14.01106 s-1  respectively. 2011 Elsevier B.V.   Cluster-Based Cu-II-Azide Polymers: Synthesis, Structure, Magnetic Properties, and Effect of Polyamines on Crystal Structures 期刊论文  OAI收割 European Journal of Inorganic Chemistry, 2010, 期号: 3, 页码: 427-437 C. B. Tian, Z. H. Li, J. D. Lin, S. T. Wu, S. W. Du and P. Lin 收藏  |  浏览/下载：100/0  |  提交时间：2012/11/02 Copper  Polynuclear compounds  Magnetic properties  Solid-state  structures  Amines  end-on azido  single-molecule magnets  dinuclear copper(ii) complexes  x-ray structures  magnetostructural correlations  s=1 chain  behavior  exchange  ligands  bridges   LED optical engine based on rectangular CPC for micro-projection display (EI CONFERENCE) 会议论文  OAI收割 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China 作者:  Meng Z.;  Meng Z. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 With applications in digital display  consumer electronics  medicine  automotive lighting  traffic signals  and general illumination  the light-emitting diode (LED) is the world's most efficient light source being mass produced today[1]. However  high cost is the main factor restricting widespread application of LED lighting  and the packaging is the most expensive aspect of LED products. Light emitting diodes (LED) are regarded as the most important light sources in solid-state lighting for their advantages in energy efficiency  long life  vivid colors  high reliability  environmental protection  safety and multiple applications. However  application of LEDs in projection display exist many questions such as low illuminance uniformity and low energy efficiency by reason of luminescence distribution and constructure specificity for LED  the study on application of LED in the micro-projection display and projection display is reported[2-8]. Considering the question mensioned above the rectangular CPC(Compound Parabolic Concentrator) system with three-color LED is applied in the projection display. 2009 SPIE.   A high-speed acquisition and processing system of the laser speckle signal on the magnetic fluid (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China 作者:  Sun Y.;  Sun Y.;  Wan Q.-H. 收藏  |  浏览/下载：32/0  |  提交时间：2013/03/25 In order to achieve the dynamical detection and real-time analysis of the movement status of the magnetic fluid  according to the difficulties of the detection of the magnetic fluid  established a high-speed acquisition and processing system of laser speckle signal on the magnetic fluid. First of all  the FPGA (EP2C8T144C8N) drived the linear array CCD(TCD1501D) to scan in the corresponding time sequence given by the computer  collected the laser speckle interferometric image in rapid change on the surface of the magnetic fluid  which followed the movement of the magnetic fluid  and the signal collected by CCD was converted into the digital data through the high-speed A/D convertor and stored into the internal buffer FIFO of the FPGA  whose width and depth were designed by the user as required. Then  the FPGA sent the digital signal of the laser speckle interferometric images into the computer through the USB2.0 highspeed differential bus  whose transmission rate can reach 480Mb/s in theory. Finally  the distribution of the laser speckle on the magnetic fluid was messy and random  which carried certain information about the surface of the magnetic fluid  based on the theories of the statistic correlation and the subdivision of images  analysing and processing the laser speckle interferometric images  indirectly got the movement status of the magnetic fluid under the electromagnetic field. The experimental results show that: the High Speed Acquisition and Processing System has the advantage of full-court  non-contact  non-invasive  high-precision and high reliability and so on. The detection resolution of high speed acquisition and processing system is superior to 1m and the sample rate is 3Msps  which basically meets the requirements of the magnetic fluid movement state detection. 2009 SPIE.   808nm high-power high-efficiency GaAsP/GaInP laser bars (EI CONFERENCE) 会议论文  OAI收割 Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China 作者:  Wang Y.;  Wang L.;  Wang L.;  Wang L.;  Liu Y. 收藏  |  浏览/下载：36/0  |  提交时间：2013/03/25 808nm high power diode lasers  which is rapidly maturing technology technically and commercially since the introduction in 1999 of complete kilowatt-scale diode laser systems  have important applications in the fields of industry and pumping solid-state lasers (DPSSL). High power and high power conversion efficiency are extremely important in diode lasers  and they could lead to new applications where space  weight and electrical power are critical. High efficiency devices generate less waste heat  which means less strain on the cooling system and more tolerance to thermal conductivity variation  a lower junction temperature and longer lifetimes. Diode lasers with Al-free materials have superior power conversion efficiency compared with conventional AlGaAs/GaAs devices because of their lower differential series resistance and higher thermal conductivity. 808nm GaAsP/GalnP broad-waveguide emitting diode laser bars with 1mm cavity length have been fabricated. The peak power can reach to 100.9W at 106.5A at quasicontinuous wave operation (200s  1000Hz). The maximum power conversion efficiency is 57.38%. Based on these high power laser bars  we fabricate a 1 3 arrays  the maximum power is 64.3 W in continuous wave mode when the current is 25.0A. And the threshold current is 5.9A  the slope efficiency is 3.37 W/A. 2008 SPIE.   Finite-temperature entanglement for low-dimensional quantum spin chains 期刊论文  OAI收割 Physical Review B, 2008, 卷号: 77, 期号: 1 Z. Y. Sun; K. L. Yao; W. Yao; D. H. Zhang; Z. L. Liu 收藏  |  浏览/下载：28/0  |  提交时间：2012/04/13 matrix renormalization-group  state  thermodynamics  s=1/2   Vaccum ultraviolet excited luminescence of Pr3+ ions at different temperatures 期刊论文  OAI收割 CHINESE JOURNAL OF INORGANIC CHEMISTRY, 2007, 卷号: 23, 期号: 6, 页码: 1103-1106 作者:  You, FT;  Huang, SH;  Wang, DW;  Qi, SQ;  Zhang, GB 收藏  |  浏览/下载：27/0  |  提交时间：2016/06/29 Pr3+  4f5d states  S-1(0) state  thermal equilibrium   The Simulation measurement experiment and calibration for Solar Total Irradiance Monitor on board (EI CONFERENCE) 会议论文  OAI收割 ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China Yupeng W.; Wei F.; Bingxi Y. 收藏  |  浏览/下载：49/0  |  提交时间：2013/03/25 STIM (Solar Total Irradiance Monitor) can be used on sun-synchronous polar orbit weather satellites to measure the total solar irradiance. It contains three independent and identical wide view absolute radiometers. They are mounted on the satellite in an angle which ensure the sun scan over the field of view of the absolute radiometers. This measurement method doesn't need the instrument tracking the sun but the sun scan over the field of view of the absolute radiometers in each orbit cycle. The paper presents the measurement method of simulation for solar irradiance measurement and calibration by mounting the instrument on a two-axis rotation table. By controlling the rotation angle velocity of the instrument in the meridian direction being the same as that of the weather satellite's on orbit  we can measure the solar irradiance when the sun scan over the field of view of the absolute radiometers to simulate the onboard state. And we have operated the measurement with the prototype of STIM. The SIAR-1 is traceable to WRR and serves as a transfer standard. So simultaneous comparison measurements between SIAR-1 and each of the three wide view absolute radiometers are measured to provide calibration corrections to the instrument. And we have a further study at the influence of stray light to the measurement results. This paper presents the method of simulation experiment and calibration for solar irradiance measurement with Solar Total Irradiance Monitor on board.   Energy transfer in Pr3+- and Cr3+-codoped SrAl 12O19 system (EI CONFERENCE) 会议论文  OAI收割 作者:  Luo Y.;  Zhang X.;  Zhang X.;  Zhang X.;  Zhang J. 收藏  |  浏览/下载：23/0  |  提交时间：2013/03/25 The energy transfer processes in Pr3+- and Cr 3+-codoped SrAl12O19 system are studied experimentally. The transfer can convert the 1S0 ultraviolet fluorescence of Pr3+ into the red emission of Cr 3+. The 3P0 state  which may be populated by 1S0&rarr1I6 emission  can also act as a donor state in the transfer to Cr3+. Cross-relaxation process is reported firstly in energy transfer between the pair of Pr 3+-Cr3+ in SrAl12O19 system. Two-step energy transfer is discussed  which involves two visible photons for each vacuum ultraviolet photon absorbed. 2006 Elsevier B.V. All rights reserved.