Study on the thermal decomposition kinetics of cis/trans-[Cu(gly)_2]·H_2O

The thermal decomposition reactions of the complexes cis/trans-[Cu(gly)2]·H2O were studied by TG-DSC methods. The results showed that they have similar decomposition process, which occur in two steps. The first step is the loss of water and the second step is the decomposition of anhydrous complexes. But for cis-[Cu(gly)2]·H2O, the temperature of losing water is higher than that of trans-isomer. Their reaction mechanisms of the two-step decomposition were also proposed.     

一种便携式干涉仪动镜系统的设计

受自身体积、重量、抗震性能等方面的限制,傅里叶变换红外光谱仪（FTIR）难以在工业现场的应用中取得很好的效果. 在充分利用立体角镜与平面折返镜各自光学特性的基础上,设计了一种自补偿型的双摆式干涉仪,在光学原理上解决干涉仪稳定性的问题. 通过对扫描机构的电力学分析与建模,建立了控制器与扫描速度之间的关系,并利用高速数字信号处理（DSP）技术实现相应的控制算法,能够将速度误差控制在±0.2%的范围内. 通过对仪器性能及标准样品的测试表明,仪器具有较高的信噪比与稳定性,能够满足工业应用的需求.     

Synthesis and photoluminescence properties of the high-brightness Eu3+-doped Sr3Bi(PO4)3 phosphors

A series of orange reddish emitting phosphors Eu³⁺-doped Sr₃Bi(PO₄)₃ have been successfully synthesized by conventional solid-state reaction, and its photoluminescence (PL) properties have been investigated. The excitation spectra reveal strong excitation bands at 392 nm, which match well with the popular emissions from near-UV light-emitting diode chips. The emission spectra of Sr₃Bi(PO₄)₃:Eu³⁺ phosphors invariably exhibit five peaks assigned to the ⁵D₀→⁷F_J (J=0, 1, 2, 3, 4) transitions of Eu³⁺ and have dominating emission peak at 612 nm under 392 nm excitation. The luminescence intensity was enhanced with increasing Eu³⁺ content and the emission reached the maximum intensity at x=0.05 in Sr₃Bi(PO₄)₃:xEu³⁺. The energy transfer behavior in the phosphors was discussed. The Commission Internationale de lEclairage (CIE) chromaticity coordinates, the quantum efficiencies, and the decay curves of the entitled phosphors excited under 392 nm are also investigated. The experimental results indicate that the Eu³⁺-doped Sr₃Bi(PO₄)₃ phosphors are promising orange reddish-emitting phosphors pumped by near-UV light.     

量子电动力学—粒子模拟极端等离子体动力学研究

新一代拍瓦激光装置有望将激光强度提升至10²³~10²⁴ W·cm^-2,在此极端强场条件下非线性量子电动力学效应对等离子体动力学过程产生重要影响.相对论电子在强电磁场作用下会同步辐射大量伽马光子,当后者穿过超强电磁场时会级联产生正负电子对.与此同时,这些量子电动力学效应也会反作用于激光等离子体相互作用过程,如辐射阻尼严重影响电子运动过程.为了研究这样极端的等离子体动力学,我们介绍最近几年发展的量子电动力学数值模拟模块,并将其耦合到传统的粒子模拟程序中,即量子电动力学-粒子模拟程序.由于大量新辐射的光子和产生的正负电子对会造成模拟粒子数目的不断增加,我们发展了粒子融合技术来减小模拟规模.利用此量子电动力学-粒子模拟程序,我们对极端强场激光物质相互作用以及极端天体物理现象开展了数值模拟研究.     

Medium effect on the characteristics of the coupled seismic and electromagnetic signals

Recently developed numerical simulation technique can simulate the coupled seismic and electromagnetic signals for a double couple point source or a finite fault planar source. Besides the source effect, the simulation results showed that both medium structure and medium property could affect the coupled seismic and electromagnetic signals. The waveform of coupled signals for a layered structure is more complicated than that for a simple uniform structure. Different from the seismic signals, the electromagnetic signals are sensitive to the medium properties such as fluid salinity and fluid viscosity. Therefore, the co-seismic electromagnetic signals may be more informative than seismic signals.     

Study on the thermal decomposition kinetics ofcis/trans-[Cu(gly)2] • H2O

The thermal decomposition reactions of the complexescis/trans-[Cu(gly)₂] • H₂O were studied by TG-DSC methods. The results showed that they have similar decomposition process, which occur in two steps. The first step is the loss of water and the second step is the decomposition of anhydrous complexes. But forcis-[Cu(gly)₂]•H₂O, the temperature of losing water is higher than that oftrans-isomer. Their reaction mechanisms of the two-step decomposition were also proposed.

     

稀土铕与2－［（取代苯胺基）羰基］苯甲酸配合物的研究

报道了配合物Ｅｕ（ＸｎＰ）３·３Ｈ２Ｏ［其中Ｘ＝Ｈ，２－Ｃｌ，３－ＯＨ，４－Ｂｒ，３－ＮＯ２，２－ＯＣＨ３，２－ＣＨ３，２，４－二氯；Ｐ＝２－（ＣＯＯ）Ｃ６Ｈ４ＣＯＮＨＣ６Ｈ５－ｎ－，ｎ＝１，２］的制备，并用元素分析，红外光谱，电子反射光谱，热重分析进行了表征。结果表明配位是通过羧酸基上氧原子和酰胺羰基氧原子进行的，含３分子水。通过电子反射光谱，对Ｎｅｐｈｅｌａｕｘｅｔｉｃ比率（Ｂ），平均共价参数（δ）和平均成键参数（ｂ１／２）进行了计算，对配合物的共价成键情况进行了讨论。     

GAOR迭代法和Jacobi迭代法的敛散关系

本文将文［１］中ＡＯＲ法和Ｊａｃｏｂｉ法同时敛散的结论推广到ＧＡＯＲ法．证明了当Ｊａｃｏｂｉ矩阵Ｂ非负时，解线性方程组Ａｘ＝ｂ（Ａ为不可约矩阵）的ＧＡＯＲ法（０≤γ_ｉ＜ω_ｉ≤１，ｉ＝１，２，…，ｎ）和Ｊａｃｏｂｉ法同时敛散，给出了其谱半径ρ（Ｌ_Ｒ，Ω）和ρ（Ｂ）之间的关系．