移动互联网时代充值支付在新渠道快速上线的体系分析

随着网络的快速发展和手机功能的不断强大,互联网发生了用户习惯的大改变。为了更好地适应顾客消费习惯的改变,以服务赢得用户、跟随用户的步伐拓展渠道成为中国移动当前业务发展的新方向,秉持为客户提供最便利的服务的宗旨,开展建设互联网充值新渠道。文章以中国移动为例,介绍了其互联网时代充值支付在新渠道快速上线的体系,并结合当前形势进行简单的分析。     

Perfectly matched layer implementation using bilinear transform for microwave device applications

This paper presents an extensive study on the perfectly matched layer (PML) implementation using bilinear transform in the finite-difference time-domain (FDTD) simulation. The bilinear transform is used to implement both the stretched coordinate PML (SC-PML) and the uniaxial PML (UPML) with the complex frequency-shifted (CFS) equations. It is shown that with the CFS factor, the implemented SC-PML and UPML attain significantly lower relative reflection error over wide frequency range with both superior in performance to the split-field PML. The FDTD algorithm incorporating these PMLs is applied to analyze wide-band responses of some complex microwave devices, including RF microelectromechanical systems switch and coplanar waveguide crossover junction.     

北京城市大气高含氧有机分子的定量测量#br#

大气高含氧有机分子是二次有机气溶胶的重要前体物。使用气态硫酸分子作为大气高含氧有机分子的替代物评估其在硝酸根-大气常压界面化学电离飞行时间质谱离子化过程中的电离效率, 并基于高分辨率差分电迁移率粒径谱仪串联飞行时间质谱建立了质谱传输效率的矫正方法, 从而建立了大气高含氧有机分子的半定量方法。在此基础上开展了北京冬季大气高含氧有机分子的外场观测, 识别了约一百一十个大气高含氧有机分子, 表征了它们的浓度变化趋势和化学组成特征。研究发现羟基自由基在大气高含氧有机分子生成过程中具有重要作用, 而氮氧化合物也会参与其中。从挥发性分布看, 该地区冬季高含氧有机分子中归于极低挥发性有机化合物 (ELVOC) 的最多, 低挥发性有机化合物 (LVOC) 次之, 表明该地区大气高含氧有机分子在大气颗粒物上的凝结对二次有机气溶胶的形成具有重要贡献。     

杨木爆破浆作新闻纸配浆的初步研究

进行了杨木爆破浆配抄新闻纸的研究，杨木爆破浆取代马尾松化学浆配抄新闻纸后除撕裂度略有下降外，裂断长、拉毛速度、印刷密度、透印值等都有明显改善     

Simultaneous CO2 and H2O Activation via Integrated Cu Single Atom and N Vacancy Dual-Site for Enhanced CO Photo-Production

Photocatalytic conversion of CO₂ into fuels using pure water as the proton source is of immense potential in simultaneously addressing the climate-change crisis and realizing a carbon-neutral economy. Single-atom photocatalysts with tunable local atomic configurations and unique electronic properties have exhibited outstanding catalytic performance in the past decade. However, given their single-site features they are usually only amenable to activations involving single molecules. For CO₂ photoreduction entailing complex activation and dissociation process, designing multiple active sites on a photocatalyst for both CO₂ reduction and H₂O dissociation simultaneously is still a daunting challenge. Herein, it is precisely construct Cu single-atom centers and two-coordinated N vacancies as dual active sites on CN (Cu₁/N_2CV-CN). Experimental and theoretical results show that Cu single-atom centers promote CO₂ chemisorption and activation via accumulating photogenerated electrons, and the N_2CV sites enhance the dissociation of H₂O, thereby facilitating the conversion from COO* to COOH*. Benefiting from the dual-functional sites, the Cu₁/N_2CV-CN exhibits a high selectivity (98.50%) and decent CO production rate of 11.12 µmol g⁻¹ h⁻¹. An ingenious atomic-level design provides a platform for precisely integrating the modified catalyst with the deterministic identification of the electronic property during CO₂ photoreduction process.     

雷达目标一维距离像特征提取方法研究

基于雷达目标一维距离像非衰减指数和模型,文中将遗传算法和Relax算法相结合求取目标散射中心参数,充分发挥两种算法的优势,通过仿真分析证明了文中方法的有效性。     

基于STM32的充电机管理单元的设计与应用

为了满足智能变电站中对充电机的管理需求,设计了一种基于STM32的充电机管理单元的设计方案。依据功能需求分析,设计了硬件构架和软件构架,研制了充电机管理单元,搭建了系统实验测试平台,实验数据表明,本设计能够实现充电机的信息采集与参数调节、本地数据显示与按键操作、远程监控双向通信、充电机逻辑控制等功能。实际应用表明其可使工作人员实时掌控充电机的工作情况,提高系统的智能化管理,且能满足实际应用的需求。     

超长距、超大容量DWDM系统解决方案探讨

对上海贝尔阿尔卡特推出的超长距离、超大容量DWDM系统解决方案——1626LM系统设备的特点，从技术方面和系统角度作了较详细的分析。     

美国船舶电台管理模式简介

为确保水上无线电通信安全,我国应加强对船舶电台的管理。本文以美国FCC为例,介绍了发达国家中较具代表性的船舶电台管理模式。     

Cr、Co、Mn磁性对ZnO压敏特性影响的机理研究

研究了不同浓度Cr、Co和Mn的掺杂对ZnO-PbO-B2O3陶瓷压敏特性的影响.实验表明,ZnO平均晶粒尺寸随各元素掺杂量增加而逐渐变大,压敏电压也随之升高,非线性系数随各元素掺杂量增加而先增大后减小,漏电流先减小后增大.分析认为,过渡族金属元素掺杂对ZnO压敏材料电性能的影响不仅与电子的能级有关,与其自旋特性也紧密相连.ZnO中掺杂的Cr、Mn、Co元素随机取代其中的部分Zn原子后,Cr2+、Mn2+、Co2+在ZnO中产生局域磁矩,会对与其取向不同的自旋电子产生强的散射,这样可增大ZnO陶瓷电阻率和提高其非线性特性.