火花－AES法测定钢铁中的11种杂质元素

本文所叙述的方法是将固体钢铁样品在车床、铣床上打平，或在磨片机上磨成平面。然后用选好的最佳仪器测量条件，用铁元素做内标，按照自编的分析程序在ＭＢＳ火花发射台的氩气气氛中激发，进行火花原子发射光谱法测定。此法简单、快速，所得分析结果与推荐的标准值基本一致，其相对标准偏差ＲＳＤ≤１０％，测试结果令人满意。     

火花—AES法测定中低合金钢中14种少量元素

本文所叙述的方法是将固体中低合金钢样品在车床或铣床上打平。或在磨片机上磨成理想的平面。然后用选好的最佳仪器测量条件，用铁元素做内标，按照自编的分析程序在多基体火花发射台的氩气氢气中激发，进行火花原子发射光谱法测定。此法简便，快速，所得分析结果与推荐的标准值基本一致，其相对标准偏差ＲＳＤ≤１０％，测试结果令人满意。     

间接光度法测定天然水中痕量Se(Ⅳ)

本文提出了在表面活性剂ＴＰＣ存在下，Ｉ３＾－间接光度法测定痕量硒。该方法灵敏度高，除铁外其他离子基本无干扰，选择性好，测定２．０μｇ Ｓｅ（Ⅳ）的样品１０次，ＲＳＤ＝３．９％，精密度较好，适用于水样中Ｓｅ（Ⅳ）的测定，实测了天然水中硒，结果满意。     

ICP—AES法测定“中华多宝”等各类营养口服液中多种元素的方法研究

本文应用ＩＣＰ－ＡＥＳ法同时测定“中华多宝”等各类营养口服液中多种元素，方法简便，快速，只需将样品用配制成１％ＨＣｌ的去离子水稀释，摇匀后即可测定。测定中，选用仪器最佳折衷条件，并采用干扰等效浓度消除光谱干扰。方法的回收率在９５－１０％，ＲＳＤ为５％。     

碳素结构钢的光电发射光谱分析方法

本文研究了火花光源－原子发射光谱法测定碳素结构钢化学成分的最佳条件，根据单道扫描型光谱仪自身的特点，选择预然时间和积分时间，并研究了钢坯及轧制成材化学成份的均匀性。将建立的校准曲线应用于进口及国产标样的测定，获得准确结果，将本方法应用于几种实际样品的测定，结果与国家标准方法吻合，对三个含量级样品的精密度实验中，连续重复精密度RSD≤5.24%；继续重复精密度基本上RSD≤5.78%；再现精密度RSD≤7.82%。     

火花-AES法测定中低合金钢中的14种少量元素

本文所叙述的方法是将固体中低合金钢样品在车床或铣床上打平，或在磨片机上磨成理想的平面．然后用选好的最佳仪器测量条件，用铁元素做内标，按照自编的分析程序在多基体（MBS）火花发射台的氩气气氛中激发，进行火花原子发射光谱法测定。此法简便、快速，所得分析结果与推荐的标准值基本一致，其相对标准偏差RSD≤10％，测试结果令人满意。     

双波长倍增差示法测定双嘧啶片中磺胺嘧啶和甲氧苄啶的含量

本论述了双波长倍增差示法同时测定了双嘧啶片中磺胺嘧啶（ＳＤ）和甲氧苄啶（ＴＭＰ）的含量，本法是基于测定标准溶液ＳＤ（８～１４）×１０＾－６ｇ／ｍＬ，ＴＭＰ（１～２）×１０＾－６ｇ／ｍＬ，和样品溶液在２４２．５ｎｍ和２２８．０ｎｍ处的吸收度。ＳＤ和ＴＭＰ的平均回收率与ＲＳＤ分别为１００．６０％，０．３３％，和９８．２７％，１．５８（ｎ＝２０）。本法简便快捷，结果满意。     

钐的时间分辨激光荧光光谱分析方法研究

本文利用Ｓｍ－ＴＴＡ－ＥｔＯＨ液体荧光体系，采用时间分辨激光荧光检测手段，建立了散的时间分辨光荧光分析法，该法的线性范围为０．０１～１０μｇ／ｍｌ，检出限为３．３ｎｇ／ｍｌ，０．５μｇ／ｍｌ钐标样测定的相对标准差为３．７％（ｎ＝１２），结合混合稀土中多种元素共存的特点，实验确定了装置的有关参数，用标准加入方法对实际样品进行了测定，并与其他方法测定结果进行了比较，结果满意，本法测定实际样品中钐的相对     

ICP－AES法测定“中华多宝”等各类营养口服液中多种元素的方法研究

本文应用ＩＣＰ－ＡＥＳ法同时测定“中华多宝”等各类营养口服液中多种元素。方法简便，快速，只需将样品用配制成１％ＨＣｌ的去离子水稀释，摇匀后即可测定。测定中，选用仪器最佳折衷条件，并采用干扰等效浓度消除光谱干扰。方法的回收率在９５％－１０５％，ＲＳＤ为５％。     

ICP-AES法测定快干胶中硼的研究

本文探讨了ＩＣＰ－ＡＥＳ法测定快干胶中硼的方法,选择了合适的测定条件,并有效地克服了测定过程中的“记忆效应”,以石英氧瓶燃烧法分解快干胶试样,有效地避免了硼的污染和逸失。该法简便,快速。实际样品测定的相对标准偏差为１０％,回收率为９１％￣９６％。     

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.     

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.     

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.     

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.     

Measurement of nonlinear coefficient of optical fiber based on small chirped soliton transmission

We measure the waveform and phase curves of short optical pulses before and after transmission over different lengths of fibers by use of the pulse analyzer with the frequency-resolved optical gating (FROG),and numerically simulate pulse evolution under the experimental conditions.The nonlinear coefficient of the fiber is given by comparing the experimental results with the numerical ones.Difference between the experiment and numerical simulation is analyzed.     

Resonance scattering of canonical elastic shells in absorbing fluid medium

Resonance scattering of elastic spherical shell and cylindrical shell while the surrounding fluid medium has absorption is studied. The normal mode solution derived using exact elastic theory and the separation of variables is still applicable. However, the scattering form function has to be modified for the absorbing medium, otherwise the unreasonable result would be obtained. The backscattering form function in the absorbing medium is redefined, and the form function of elastic spherical and cylindrical shell with vacuum or solid matter filled is calculated in various absorption conditions. The results show that the absorption of surrounding fluid leads to notable attenuation of the coincidence resonances in the mid-frequency, but it has a little influence on the low-frequency resonance scattering induced by the filler inside the shell.     

Single-beam self-referenced phase-sensitive surface plasmon resonance sensor with high detection resolution

A versatile and low-cost single-beam self-referenced phase-sensitive surface plasmon resonance(SPR)sensing system with ultra-high resolution performance is presented.The system exhibits a root-mean-square phase fluctuation of ±0.0028.over a period of 45 min.i.e.a resolution of±5.2×10-9 refractive index units.The enhanced performance has been achieved through the incorporation of three design elements:a true single-beam configuration enabling complete self-referencing so that only the phase change associated with SPR gets detected,a differential measurement scheme to eliminate spurious signals not related to the sensor response,and the elimination of retardation drifts by incorporating temperature stabilization in the liquid crystal phase modulato .Our design should bring the detection sensitivity of non-labeling SPR biosensing closer to that achievable by conventional fluorescence-based techniques.     

Influences of SiO2 protective layers and annealing on the laser-induced damage threshold of Ta2O5 films

Ta2O5 films are prepared on BK7 substrates with conventional electron beam evaporation deposition.The effects of SiO2 protective layers and annealing on the laser-induced damage threshold (LIDT) of the films are investigated.The results show that SiO2 protective layers exert little influence on the electric field intensity(EFI)distribution,microstructure and microdefect density but increase the absorption slightly.Annealing iS effective on decreasing the microdefect density and the absorption of the films.Both SiO2 protective layers and annealing are beneficial to the damage resistance of the films and the latter is more effective to improve the LIDT.Moreover,the maximal LIDT of Ta2O5 films is achieved by the combination of SiO2 protective layers and annealing.     

A stereo matching algorithm using multi-peak candidate matches and geometric constraints

Gray cross correlation matching technique is adopted to extract candidate matches with gray cross correla- tion coefficients less than some certain range of maximal correlation coefficient called multi-peak candidate matches. Multi-peak candidates are extracted corresponding to three closest feature points at first. The corresponding multi-peak candidate matches are used to construct the model polygon. Correspondence is determined based on the local geometric relations between the three feature points and the multi-peak candidates. The disparity test and the global consistency checkout are applied to eliminate the remaining ambiguous matches that are not removed by the local geometric relational test. Experimental results show that the proposed algorithm is feasible and accurate.