二维带边界偏导数值的复化数值积分公式

构建了一类二维带边界偏导数值的复化数值积分公式,给出了所建立的两种数值积分公式的稳定性分析、误差分析和代数精度.与二维复化四点高斯数值积分公式相对比,所建立的带边界偏导数值的复化梯形、复化辛普森求积公式在达到相同精度时所需积分节点大大减少,积分的时间复杂度也随之大大减少,实例验证结果良好.     

CRE Method for Solving m Kd V Equation and New Interactions Between Solitons and Cnoidal Periodic Waves

In nonlinear physics, the modified Korteweg de-Vries(m Kd V) as one of the important equation of nonlinear partial differential equations, its various solutions have been found by many methods. In this paper, the CRE method is presented for constructing new exact solutions. In addition to the new solutions of the m Kd V equation, the consistent Riccati expansion(CRE) method can unearth other equations.     

ICP-MS用于新疆紫草的无机元素初级形态分析及其溶出特性研究

应用电感耦合等离子体质谱技术(ICP-MS),分析了新疆紫草中20多种无机元素的初级形态;并研究了不同提取溶剂对其溶出特性的影响。结果显示：在消解方法上,高温密封消解较之微波辅助消解(MAP)能更彻底地消解样品,达到分析要求;在溶液中,除了K,Zn以溶解态为主要存在形式外,其余绝大部分元素主要以悬浮态存在;不同提取溶剂的极性与所分析的无机元素密切相关。Mg,K,Ca,Mn,Tl, Co和Pb等7种元素的提取得率与其提取溶剂极性呈完全的正比例关系,其余元素尽管略有差异,但基本上呈线性关系。     

电沉积法制备ZnO纳米柱及其机制研究

采用阴极还原方法,以Zn(NO₃)₂水溶液为电解液制备ZnO纳米柱。分析了不同沉积电位和不同沉积时间的缓冲层对ZnO纳米柱的密度、形貌及取向的影响。通过分析缓冲层在不同沉积时间下的电流密度变化,研究了缓冲层对ZnO纳米柱密度影响的机理。利用扫描电子显微镜(SEM)和X射线衍射(XRD)分析了样品的表面形貌及结构。研究结果表明,缓冲层能够增加ZnO纳米柱的密度及c轴的取向性,当缓冲层的沉积时间为60 s时,可以得到密度最大、取向最好的ZnO纳米柱。     

指数回归-ARMA模型在我国人均生活电力消费量预测中的应用

随着我国经济快速增长、居民收入水平的显著提高,生活电力消费量快速增长。本文以1983-2006年我国人均生活电力消费量的历史数据为基础,根据趋势图拟合出与之相似的指数回归曲线,然后对其残差序列进行分析和识别,找出适合我国人均生活电力消费量的指数回归-ARMA模型,并根据此模型进行预测分析。     

考虑泊位疏浚的连续型泊位和动态岸桥联合调度

针对集装箱码头泊位需要定期维护的实际特征,研究了泊位疏浚情况下连续型泊位和动态岸桥联合调度问题。首先,建立了一个以船舶周转时间最小为目标的整数线性规划模型;其次,针对问题特性设计了三种启发式算法。为了分析泊位疏浚对码头工作的影响并验证模型正确性和算法有效性,分别对未考虑泊位疏浚和考虑泊位疏浚两种调度情形,进行了小规模与大规模问题输入的多组测试。三种算法在小规模输入上均取得了相同于CPLEX的精确解,从而验证了算法的有效性;进一步通过对比分析这些算法在大规模输入中的运行结果,验证其有效性能。     

Low Energy Scattering of Electrons by Sodium

The low energy scattering of electrons by sodium at incident energies up to ionization threshold are calculated by applying the momentum space coupled-channel-optical （CCO） method. The present results are in good agreement with the previous experimental and theoretical results. Furthermore, three resonances in the total cross sections observed by previous experiments are proved by the present calculation.     

Mode-Locking Behaviour in Driven Colloids with Random Pinning

We find mode-locking steps in simulated force-velocity characteristics of external alternating-force （AF） driven colloids on a disordered substrate. Studies of mode-locking patterns in systems show that mode-locking steps are accompanied with the emergence of a dynamics phase： transverse solid phase. We also study the influence of temperature on the width of mode-locking steps. The mode-locked state is destroyed by thermal fluctuation and the width of mode-locking steps decreases rapidly with increasing temperature. In high velocity and low temperature regimes, due to the appearance of transverse solid phase and microscopically periodic velocity modulation, the step width changes little as temperature is varied.     

Extraordinary Transmission through Metallic Grating with Subwavelength Slits for S-Polarization Illumination

Based on the rigorous coupled-wave analysis algorithm, we have systematically analysed the effect of the geometrical parameters of a dielectric film coated metallic grating with subwavelength slits on extraordinary optical transmission for s-polarization illumination. Results show that the dielectric film which sustains a waveguide electromagnetic mode on the top of the metallic lamellar grating can strongly enhance the transmittance, the positions of the transmission peaks are mainly determined by the period of the metallic grating, the thickness and refractive index of the dielectric film. This structure shows potential applications in excellent polarizers or polarization-isotropic devices at infrared spectral range by appropriately choosing the geometrical parameters.