NUMERICAL METHODS FOR MISCIBLE DISPLACEMENT IN POROUS MEDIA INFLUENCED BY MOBILE WATER AND IMMOBILE WATER

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Ab initio Calculation and Kinetic Study for the Abstraction Reaction of H with Sihcl3

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The eigenenergies for ~3S excited states of the helium atom with CFPHGLF method

The matrix elements of the correlation function between symmetric potential harmonics were first simplified into the analytical summation of the grand angular momentum. The correlation-function potential-harmonic and generalized Laguerre function method (CFPHGLF) proposed by us recently was then applied to directly solve the Schrodinger equation for n3S(n=2-5) excited states of the helium atom. With only 12 PHs, the convergent eigenenergies of 23S, 33S, 43S and 53S states were 2.17427, 2.06849, 2.03644, 2.02257 Eh, respectively. The errors only were 0.00096, 0.00020, 0.00007, 0.00005 Eh, when compared with the exact Hylleraas variational results respectively.     

Synthesis of New Naphthaline-type Chromophores with Strong Green-emitting or the Blue-emitting in β-Cyclodextrin

Three new naphthaline-type chromophores end-capped with different (p-substituted amino) styryl groups on the both sides (named as BPASN, BHMASN and BMASN) have been synthesized. Under excitation of 380nm, strong green light-emitting locating at 517nm with the fluorescence quantum yield of 0.88 in CH2Cl2 has been obtained.In the presence of β-cyclodextrin (β-CD), strong blue-emitting at 456nm in DMF was also recorded.     

稀疏素数集中的Waring-Goldbach问题(Ⅱ)

本文研究了Waring-Goldbach问题(k=2)与Piatetski-Shapiro素数定理的混合问题,从而进一步深化了华罗庚教授的经典结果.     

Nd：YAG晶体1．064μm受激发射截面随温度变化特性研究

测量了Nd：YAG晶体从-70℃到 80℃不同温度下的荧光发射光谱和荧光寿命，计算了该晶体在不同温度下1．064μm受激发射截面，首次获得在此温度变化范围内受激发射截面随温度的线性变化关系．     

人体皮肤吸收光谱的活体检测

以Kubelka-Munk理论为基础,研究黄种人皮肤的光学特性.通过分析皮肤内的光传输模型,得出皮肤光吸收比公式,并提出一种新的基于虚拟仪器和光谱技术的皮肤光吸收作用活检方法,实现皮肤吸收光谱的活体检测,首次得到正常人体活体皮肤的吸收光谱.     

IMPLICIT-EXPLICIT MULTISTEP FINITE ELEMENT-MIXED FINITE ELEMENT METHODS FOR THE TRANSIENT BEHAVIOR OF A SEMICONDUCTOR DEVICE

The transient behavior of a semiconductor device consists of a Poisson equa-tion for the electric potential and of two nonlinear parabolic equations for the electrondensity and hole density.The electric potential equation is discretized by a mixed finiteelement method. The electron and hole density equations are treated by implicit-explicitmultistep finite element methods. The schemes are very efficient. The optimal order errorestimates both in time and space are derived.     

吸光度比值K系数法同时测定撒痛风注射液中的三组分

本文阐述了吸光度比值K系数法的基本原理及实验方法。试用本法测定撒痛风注射液的含量。样品可不经分离,直接测定三个波长处的吸光度,便能同时求出水杨酸钠,咖啡因和安替比林的含量,其平均回收率及变异系数分别为100.9%,0.41%;99.94%,0.38%;99.47%.0.31%。本法操作简单,计算方便,为不经分离直接测定相互干扰的多组分体系分析,提供了可行的途径。     

催化剂对煤着火特性的影响 Ⅱ.不同催化剂对煤催化着火的影响

通过测定煤的着火点研究了不同催化剂对大同烟煤和晋城无烟煤的催化着火的影响。结果表明,催化剂化学组成是决定催化作用大小的一个重要的因素,具有同一碱金属离子,不同阴离子的催化剂酸性越强,催化作用越弱,其催化活性顺序为OH~->CO_3~(2-)>Cl~->SO_4~(2-);具有同一阴离子,不同碱金属或碱土金属阳离子的催化作用可用“电子转移学说”来解释,其催化作用的大小,随相应的碱金属,碱土金属的第一电离能的减少而增加。