类镓等电子序列ZrⅩ-RhⅩⅤ离子的4s~24p-4s~24d、4s~24p-4s4p~2、4s~24p-4s~25s、4p~3-4s~25s以及4s4p~2-4p~3跃迁谱线和振子强度的理论计算

本文对类镓等电子序列ＧａⅠ—ＸｅⅩⅩⅠⅤ离子４ｓ２４ｐ、４ｓ２４ｄ、４ｓ４ｐ２、４ｐ３和４ｓ２５ｓ组态能级结构和组态相互作用进行了理论分析，找出沿等电子序列的变化规律。用作者提出的半经验公式［１］，内插预测了ＴｃⅩⅢ离子的４ｓ２４ｐ、４ｓ４ｐ２和４ｓ２５ｓ组态能级，外推预测了ＴｃⅩⅢ—ＲｈⅩⅤ离子的４ｐ３和４ｓ２４ｄ组态能级，并给出了４ｓ２４ｐ４ｓ２４ｄ、４ｓ２４ｐ４ｓ４ｐ２、４ｓ２４ｐ４ｓ２５ｓ、４ｐ３４ｓ２５ｓ和４ｓ４ｐ２—４ｐ３谱线波长和ＨＸＲ方法理论计算振子强度。用作者提出的半经验公式对组态能级的预测值与实验值的最大偏差小于１００ｃｍ－１。     

类镓等电子序列PdⅩⅥ—TeⅩⅫ的4s^24p—4s4p^2,4s^24p—…

对类镓等电子序列ＧａⅠ－ＸｅⅩⅪⅤ离子４ｓ＾２４ｐ，４ｓ４ｐ＾２，４ｓ＾２５ｓ组态能级结构和组态相互作用进行了理论分析，找出沿等电子序列的变化规律。用我们提出的拟合公式预测ＳｎⅩⅩ－ＴｅⅩⅫ离子４ｓ＾２４ｐ，４ｓ４ｐ＾２，４ｓ＾２５ｓ组态能级，并给出４ｓ＾２４ｐ－４ｓ４ｐ＾２，４ｓ＾２４ｐ－４ｓ＾２５ｓ谱线波长和ＨＸＲ方法的理论计算振子强度，理论计算值与实验值进行了比较。     

类镓等电子序列PdⅩⅥ－TeⅩⅫ的4s~24p－4s4p~2、4s~24p－4s~25s跃迁谱线和振子强度的理论计算

对类镓等电子序列ＧａⅠ－ＸｅⅩⅩⅣ离子４ｓ２４ｐ、４ｓ４ｐ２、４ｓ２、５ｓ组态能级结构和组态相互作用进行了理论分析，找出沿等电子序列的变化规律。用我们提出的拟合公式预测ＳｕⅩⅩ－ＴｅⅩⅫ离子４ｓ２４ｐ、４ｓ４ｐ２、４ｓ２５ｓ组态能级，并给出４ｓ２４ｐ－４ｓ４ｐ２、４ｓ２４ｐ－４ｓ２５Ｓ谱线波长和ＨＸＲ方法的理论计算振子强度，理论计算值与实验值进行了比较。     

水溶液中不同结构氨基酸对Ag4^2＋团簇的稳定能力研究

利用紫外光照射制得了Ａｇ４＾２＋团簇，并分别研究了氨基酸，甘氨酸，谷氨酸，羟脯氨酸对Ａｇ４＾２＋的稳定作用，发现Ａｇ４＾２＋均能被这４种氨基酸稳定，而且蛋氨酸的稳定作用强。     

4，4′，4″，4－磺酸酞菁镓的二聚常数的测定

采用光度法测定了４，４′，４″，４－磺酸酞菁镓（ＴｓＰｃＧａ）的二聚平衡常数Ｋｄ，讨论了ｐＨ值、离子强度、水、温度等因素对Ｋｄ的影响。     

RhⅩⅥ─InⅩⅩ离子n＝4Complex跃迁谱线和振子强度的计算

对类锌等电子序列ＺｎⅠ－ＳｎⅩⅩⅠ离子ｎ＝４Ｃｏｍｐｌｅｘ组态的能级结构和组态相互作用进行了理论分析。通过分析ＨＸＲ方法理论计算值与实验值之差ΔＥ随Ｚｃ的变化关系，找出了用于最小二乘拟合计算的半经验拟合公式，用此公式预测了ＣｄⅩⅠⅩ－ＩｎⅩⅩ离子ｎ＝４Ｃｏｍｐｌｅｘ中至今还没有实验值的部分能级。给出４ｓ２－４ｓ４ｐ，４ｓ４ｐ－４ｓ４ｄ跃迁波长和相应的ＨＸＲ方法计算的振子强度，同时也对预测能级值的可靠性作了说明     

Zn Ⅰ-BrⅥ离子n=4(Δn=0)跃迁谱线波长和振子强度的理论计算

对类锌ＺｎⅠ－ＢｒⅥ离子４ｓ２、４ｓ４ｐ、４ｓ４ｄ、４ｓ５ｓ组态能级进行了系统的理论拟合计算。发现了文献［１－３］中有个别辨认的错误。给出了４ｓ２—４ｓ４ｐ，４ｓ４ｐ—４ｓ４ｄ跃迁谱线波长值和相应的ＨＸＲ方法计算的振子强度。     

4,4‘,4“,4”’—磺酸酞菁镓的二聚常数的测定

采用光度法测定了４，４＇，４＂，４＂＇－磺酸酞菁镓（ＴｓＰｃＧａ）的二聚平衡常数Ｋｄ，讨论了ＰＨ值，离子强度、水温度等因素对Ｋｄ的影响。     

火焰原子吸收法间接测定植物中的硫

根据植物中的硫消化后，消化液中的ＳＯ＾２－４与ＢａＣｒＯ４悬浊液反应释放出ＣｆＯ＾２－４，用火焰原子吸收法间接测定ＳＯ＾２－４。本文研究了影响试样消化液中ＳＯ＾２－４定量测定的各种条件，通过加入一定的量的钙，解决大量共存ＰＯ＾３－４的干扰。与电感耦合等离子体发射光谱法进行了结果对照，基本一致。     

NiI等电子数序列KrⅨ－RhⅩⅧ原子参数的计算

利用可得到的实验结果，假设能级的实验值与ＨＦＲ方法的计算值之差随有效核电荷的变化可用函数进行最小二乘拟合，对ＫｒⅨ─ＲｈⅧ３ｄ－４ｐ、４ｓ－４ｐ、４ｐ－４ｄ的能级和波长进行计算，并给出各谱线的ＨＦＲ理论振子强度。     

Hybrid Wavelength and Code Division Multiple Access in Optical Networks

A review of schemes for multiple access in fiber optic networks shows that a hybrid of wavelength and code division multiple access (WCDMA) combines the best features of both. In particular, the hybrid scheme retains the large information carrying capacity of wavelength division multiple access (WDMA) and flexibility of code division multiple access (CDMA). In this paper WDMA, optical CDMA (OCDMA), and WCDMA networks are discussed. In OCDMA networks, concept of incoherent and coherent coding including inverse decoding and matched filter is introduced. The delay performance of both WDMA and WCDMA networks, under the simple suboptimum access protocols based on cyclic search, is computed. It has been shown quantitatively that tuning delay significantly affects the delay performance of both WDMA and WCDMA networks. Futhermore, delay performance of WCDMA networks is always better than the WDMA networks for the same tuning delay, load, and number of users.     

Guided-Wave Two-Dimensional Acousto-Optic Scanner Using Proton-Exchanged Lithium Niobate Waveguide

Two-dimensional scanning of a 0.6328 mum guided-light beam has been realized using noncolinear acousto-optic (AO) coplanar Bragg diffraction together with colinear AO guided-mode to substrate radiation-mode conversion in a Z-cut Xpropagation LiNbO3 proton-exchanged (PE) waveguide. The two surface acoustic (SAW) waves utilized are at the center frequencies of 500 and 200 MHz, propagating in the Y and X axes, respectively. Two-dimensional scanning of approximately 720 resolvable light beam spots, namely, 18 40 (horizontal vertical) scanning, has been demonstrated using a light beam of 1.0 mm aperture. The total number of resolvable beam spots can be greatly increased from 720 by simply utilizing SAW transducers of larger bandwidth and a light beam of greater aperture. It should also be possible to significantly increase the diffraction efficiency from 3 % by optimizing the parameters of the PE waveguide and the SAWs.     

Femtosecond Transform-Limited Pulse Generation by Compensating for the Linear Chirp of SPM Spectra in Dispersion Shifted Fibers

A simple technique of pulse compression, based on the linear chirp compensation of self-phase modulation (SPM) spectra in dispersion shifted fibers, is demonstrated. The optimization procedure is carried out, for a short span of a single-mode fiber, using a parabolic law, which describes the behavior of the squared output pulse width versus the pump peak power in the case of Gaussian pulses. The experimental results give a minimum pulse duration of 233 fs, which is in good agreement with the model. Shorter and coherent pulses, down to 90 fs, have been obtained by inserting an interference filter at the optical output.     

Effect ofγ-radiation on the spectral luminescence characteristics of impure cadmium tungstate crystals

Results of a study of the effect of γ-radiation on the spectral luminescence properties of cadmium tungstate crystals doped with silver, bismuth, and molybdenum cations are presented. Spectral characteristics of the nondnnnoped crystals are briefly described. Absorption and photo and X-ray luminescence spectra of the crystals taken before and after exposure to γ-radiation (5.5·10⁴ Gy) are compared. It is found that the spectral characteristics of the crystals doped with silver, bismuth, and molybdenum cations do not change markedly after the exposure. The relation between the type of impurity-induced defects, individual characteristics of the impurity cations, and the character of the effect of γ-radiation on the spectral luminescence properties of impure crystals is analyzed (preliminarily). Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 55–60, January–February, 1997.     

Research on beamforming method for dual-line array with space mismatch between the two line arrays

The performance of port/starboard discrimination of dual-line array will be seriously degraded when the space between the two line arrays of the dual-line array is mismatched. The directivity function of the delay-sum and delay-subtract beamforming is deduced and the port/starboard discrimination of the delay-sum and delay-subtract beamforming is also studied both under the ideal status and the status under which the space between the two line arrays of the dual-line array is mismatched. Analysis results show the delay-subtract beamforming has better performance of port/starboard discrimination. At last, the sea trial results demonstrate the theoretical results.     

Sorting of bending magnets for the SSRF booster

The Shanghai Synchrotron Radiation Facility(SSRF)booster ring,a full energy injector for the storage ring,is deigned to accelerate the electron beam energy from 150MeV to 3.5GeV that demands high extraction efficiency at the extraction energy with low beam loss rate when electrons are ramping.Closed orbit distortion(COD)caused by bending magnet field uniformity errors which affects the machine performance harmfully could be effectively reduced by bending magnet location sorting.Considering the affections of random errors in measurement,both ideal sorting and realistic sorting are studied based on measured bending magnet field uniformity errors and one reasonable combination of bending magnets which can reduce the horizontal COD by a factor of 5is given as the final installation sequence of the booster bending magnets in this paper.     

Retrieval of ultraviolet skylight radiances and O3 slant column densities from balloon-borne limb spectrometer

With a novel light-weight and absolutely calibrated ultraviolet （UV） spectrometer, UV skylight radiances and O3 slant column densities are measured by balloon-borne limb measurements in Xinjiang area, China. UV skylight radiances measured at the height of 31 km are compared with the results from Modtran in the wavelength range from 290 to 420 nm. O3 slant column densities are derived from radiance spectra in the Huggins bands （320 - 335 nm） using differential optical absorption spectroscopy method. And the parameter exhibits a good correlation with the same value simulated by radiative transfer model （Tracy）. The O3 profile simultaneously measured by an O3 sonde is used as input in Tracy calculations. The O3 sonde is launched on the same balloon.     

Design optimization of highly sensitive LSPR enhanced surface plasmon resonance biosensors with nanoholes

For breaking through the sensitivity limitation of conventional surface plasmon resonance (SPR) biosensors, novel highly sensitive SPR biosensors with Au nanoparticles and nanogratings enhancement have been proposed recently.But in practice, these structures have obvious disadvantages.In this study, a nanohole based sensitivity enhancement SPR biosensor is proposed and the influence of different structural parameters on the performance is investigated by using rigorous coupled wave analysis (RCWA).Electromagnetic field distributions around the nanohole are also given out to directly explain the performance difference for various structural parameters.The results indicate that significant sensitivity increase is associated with localized surface plasmons (LSPs) excitation mediated by nanoholes.Except to outcome the weakness of other LSP based biosensors, larger resonance angle shift, reflectance amplitude, and sharper SPR curves' width are obtained simultaneously under optimized structural parameters.     

Polymer gratings based on photopolymerization for low-order distributed feedback polymer lasers

Novel polymer distributed feedback(DFB)gratings are fabricated based on photopolymerization to reduce lasing threshold of polymer lasers.A photopolymer formulation sensitive to 355-nm ultraviolet(UV)light is proposed for the fabrication of polymer gratings and it can be used to form polymer films by spin-coating process.A very low surface-relief depth ranging from 12.5 to about 1.0 nm has been demonstrated with a refractive-index modulation of about 0.012.The experimental results indicate that such polymer gratings have promising potentials for the fabrication of low-order DFB organic semiconductor lasers.     

A novel methodology for photometric compensation of projection display on patterned screen

We propose a novel methodology based on the projector-camera (ProCam) system to address the photometric compensation issue for the projection display on the patterned screen.The patterned screen is treated as the combination of a perfect white screen and a color modulator.The perfect white screen is used to automatically and accurately characterize the ProCam system offline using the polynomial model,and the parameters of the color modulator can be efficiently recovered by employing only two gray images based on the linear reflectance model.The experimental results show that the color artifacts of the display image can be greatly improved with this methodology,which demonstrates its feasibility and validity in the photometric compensation.