Role of cetyltrimethyl ammonium bromide, crystal violet and humic acid in the degradation of diclofenac under simulated sunlight irradiation

The photodegradation of diclofenac in the absence/presence of cetyltrimethyl ammonium bromide,crystal violet and humic acid under simulated sunlight has been studied.Under the study conditions,it is apparent that cetyltrimethyl ammonium bromide and crystal violet concentrations inhibit effects on the photodegradation of diclofenac.Humic acid has no distinct effect on the photodegradation of diclofenac.Crystal violet has an obvious antagonistic action for humic acid and a similar antagonistic action between cetyltrimethyl ammonium bromide and crystal violet.Cetyltrimethyl ammonium bromide and humic acid have synergistic effect.An antagonistic action is present between cetyltrimethyl ammonium bromide,crystal violet and humic acid.Moreover,a simple linear model which describes the obtained results is shown.     

pH值对金刚石表面化学镀镍的影响

本文以金刚石颗粒表面化学镀的方法镀覆镍金属层为背景,通过X射线衍射(XRD)、扫描电镜(SEM)等测试手段研究了pH值对镀层的组织、形貌及镀速的影响。结果表明:当镀液的pH值低于10.5时,镀速几乎为零,反应不能发生;pH值在10.5～12时,镀速随pH值的增加而增大,且镀速增加较快,XRD图谱中有镍峰存在,镍峰随pH值的增加而增强,基体有裸露现象;当pH值在13左右时,镀速较为稳定,镍衍射峰较强,镀层较为均匀,无裸露现象;pH值接近14时,镀层较为粗糙,且有脱落现象。在pH值等于13的条件下二次化学镀,基体表面得到的镀层厚度大约为1.5μm,镀层致密度较好,且包覆严实。     

Generalized synchronization of the fractional-order chaos in weighted complex dynamical networks with nonidentical nodes

A fractional-order weighted complex network consists of a number of nodes, which are the fractional-order chaotic systems, and weighted connections between the nodes. In this paper, we investigate generalized chaotic synchronization of the general fractional-order weighted complex dynamical networks with nonidentical nodes. The well-studied integer-order complex networks are the special cases of the fractional-order ones. Based on the stability theory of linear fraction-order systems, the nonlinear controllers are designed to make the fractional-order complex dynamical networks with distinct nodes asymptotically synchronize onto any smooth goal dynamics. Numerical simulations are provided to verify the theoretical results. It is worth noting that the synchronization effect sensitively depends on both the fractional order ?? and the feedback gain k _i . Moreover, generalized synchronization of the fractional-order weighted networks can still be achieved effectively with the existence of noise perturbation.     

覆盖粗糙集模型增值算子及其性质

为了给不断发生变化的数据库的知识发现提供新的数学工具,本文引进覆盖粗糙集模型的确定增值算子ZX(Y)和不确定增值算子ZX(Y),并讨论了它们的有关性质,即通过研究两个新集合hX(x)、lX(x)的性质(定理2.1和定理2.2),给出并证明了两个增值算子的性质(定理2.3和定理2.4)。     

带自由变量的广义几何规划问题的全局优化

对带自由变量的广义几何规划问题(FGGP)给出一全局优化算法.该算法先利用等价转换把(FGGP)中的自由变量转化为正变量,再通过凸化方案建立了(FGGP)的松弛凸规划(RCP).通过对(RCP)可行域的细分以及一系列(RCP)的求解过程,提出的算法收敛到(FGGP)的全局最优解,且数值例子表明了算法的可行性.     

Principle of temperature,velocity and pressure of upper atmospheric wind measurement for the Voigt profile

Using the accurate expression of the Fourier transform of the pure Voigt spectral line profile, we present the principle of the passive optical method to measure temperature, velocity, and pressure of atmospheric wind for the Voigt profile. Through discussion, from the Gaussian, Lorentzian and Voigt profiles, we find that velocity will not be affected, pressure can be derived for Lorentzian and Voigt profiles, and temperature will be affected greatly. By simulation and comparison, we find that temperature derived from the Voigt profile is greater than that from the Gaussian profile, and it is less than that from the Lorentzian profile. This discussion will be significant in accurate upper atmospheric wind measurement.     

激光场中极化势对电子-氦原子散射影响

构建含有极化势的静电屏蔽势和单纯的静电屏蔽势这两种原子势模型，应用第二玻恩近似（SBA）理论，分别对激光场中电子-氦原子散射截面进行了理论计算。对比实验结果发现含有极化势的静电屏蔽势给出的结果与实验符合较好。表明极化势在激光辅助电子-原子散射中起着重要作用。     

Compton散射下等离子体交叉相位调制不稳定性增益谱

应用多光子非线性Compton散射模型和非线性Schrodinge方程,将入射光和Compton散射光作为形成等离子体交叉相位调制不稳定性的新机制,给出了高阶色散和高阶非线性下等离子体交叉相位调制不稳定性增益谱表达式,并进行了数值模拟.结果表明:与Compton散射前相比,Comnpton散射下的四阶色散使等负色散区的交叉相位调制不稳定性的两个频谱宽度比正色散区的宽,增益谱第二谱区及其峰值更接近零点,即使小功率光波,高频散射光的高阶色散和高阶非线性对交叉相位调制不稳定性的影响依然不可忽略.正五阶非线性使交叉相位调制不稳定性加强,第二谱区增益谱宽和峰值比第一谱区增大得更为明显;负五阶非线性对交叉相位调制不稳定性起抑制作用,五阶非线性系数绝对值越大,抑制作用越明显.散射使等离子体损耗对交叉相位调制不稳定性的影响减弱,随传输距离增加,增益谱宽缓慢减小.这主要是由于散射产生的非线性有效地补偿因传输距离增加而减小非线性的缘故.     

利用CdTe量子点增敏鲁米诺-过氧化氢化学发光体系测定水环境中的对苯二酚

在碱性条件下,CdTe量子点对鲁米诺-过氧化氢化学发光体系具有显著的增敏作用,而对苯二酚对该体系的化学发光有强烈的抑制作用,以此建立了流动注射化学发光检测对苯二酚的新方法。在优化实验条件下,在1.0～25 nmol·L-1范围内对苯二酚的浓度与化学发光强度的抑制值ΔI呈良好的线性关系(R2=0.993 2),检出限为0.76 nmol·L-1,经实际应用证明,该方法可用于水环境中对苯二酚的测定。此外,对CdTe量子点增敏鲁米诺-过氧化氢化学发光体系的机理进行了探讨。     

基于联萘酚的水溶性手性大环荧光传感器的合成与晶体结构

以R-联萘酚、氯氰胺、间苯二胺、1,2二苯基乙二胺、乙二胺为原料合成了3个水溶性手性大环荧光传感器;利用核磁共振(1 H NMR和13 C NMR)、质谱、红外光谱验证了合成产物的结构,利用元素分析仪测定了其组成,并利用X射线衍射分析确定了单晶R-3的晶体结构.结果表明,R-3属于单斜晶系,P2(1)/n空间群,晶胞参数为:a=1.128 6nm,b=1.566 1nm,c=2.293 9nm,β=90°,Z=4,Dc=1.328g.cm-3,F(000)=1 684.