电信套餐资费配置研究

针对电信套餐资费人工配置周期长、效率低等现状,提出一种模板化的资费配置体系,采用预定义资费模板和自动化加载业务参数的方法,提升资费配置效率。针对集团级集约销售品进行了验证,并对套餐其他配置内容进行了扩展。     

雷达操作系统架构设计

介绍了雷达操作系统(ROS)的定义及其特点,然后,对其与传统操作系统的差异进行了对比分析,并给出了设计需求描述。针对雷达设备的特殊性,提出了ROS的整体架构,包括开发环境、程序结构和运行模式。面向底层硬件的驱动设计方面提出了三类驱动方式,并给出了相关标准数据结构。文中以国产“飞虹”雷达操作系统为例,对所提出架构的设计要素分别进行了说明和验证。     

无人机光电探测距离分析

针对低空消费级无人机这种低慢小目标,采用理论建模和对实验中飞行温度参数实测的方法,建立了目标红外辐射模型以及背景辐射参数模型,得到了与实测结果比较相符的红外探测距离。指出了对这类低红外辐射目标,对阳光反射和背景噪声必须精细估算才能得到比较准确的红外作用距离。另外,通过对分析结果的讨论,对未来无人机红外探测系统的设计提出了一些建议。     

不同大气条件下红外成像系统作用距离评估

通常红外系统的作用距离考核必须在特定的大气条件下进行,这对试验时机的选择带来不便,本文在分析大气各成分对目标红外辐射能量的衰减机理的基础上,分析出影响红外成像系统作用距离的主要因素,探索不同大气条件下红外系统作用距离的评估方法,为在任意大气条件下该项指标的测试结果评判提供参考,具有较大的借鉴意义。     

浅谈“营改增”对电信行业的影响

本文着眼于“营改增”分析了其对电信行业的影响,具体探讨了电信行业的特殊性、营业税、增值税等特点,且全面分析了营业税改为增值税后的几方面的变化,综合电信行业特点提出了电信行业应对的措施建议。     

窄视角蓝相液晶显示器

基于克尔效应的聚合物稳定蓝相液晶显示器被设计出窄视角显示模式,用于公共场所下私人信息的保护。通过使用几个简单的单轴膜,聚合物稳定蓝相液晶显示器就可以呈现出极佳的窄视角效果,即,对比度大于10°的可视区在20°极角范围内。此外,该显示器的驱动电压为14 V,最大透过率为71%,不仅满足了当前主流非晶硅薄膜晶体管的驱动需求,还进一步提高了背光源的光利用率。本文提出的窄视角蓝相液晶显示器与传统的窄视角模式相比较而言,没有复杂的电极结构以及繁琐的补偿方案,较3M公司的保护膜而言,具有生产成本低的优势,这些优势使其具备了在工业上生产的条件。在信息时代,窄视角液晶显示器将在防止私人信息的泄露上扮演越来越重要的作用。     

Comprehensive analysis of photonic nanojets in 3D dielectric cuboids excited by surface plasmons

In this paper we study the excitation of photonic nanojets (PNJ) in 3D dielectric cuboids by surface plasmons at telecommunication wavelengths. The analysis is done using the effective refractive index approach. It is shown that the refractive index contrast between the regions with and without cuboid should be roughly less than 2 in order to generate jets at the output of the cuboid. The best performance at λ₀ = 1550 nm is obtained when the height of the cuboid is 160 nm producing a jet just at the output interface with a subwavelength resolution of 0.68λ₀ and a high intensity enhancement (×5) at the focus. The multi‐wavelength response is also studied demonstrating that it is possible to use the proposed structure at different wavelengths. Finally, the backscattering enhancement is numerically evaluated by inserting a metal particle within the PNJ region, demonstrating a maximum value of ～2.44 dB for a gold sphere of radius 0.1λ₀.

     

“疏堵结合”——P2P内容缓存方案

目前P2P技术已经使互联网发生了质的改变。如何合理的利用和管理P2P技术,已经摆了网路运营商面前。本文详细描述了基于"疏堵结合"思想的P2P内容缓存方案。该方案利用智能缓存技术,使P2P流量本地化,解决P2P应用的管理问题。     

Use of immobilized amyloglucosidase as chiral selector in chromatography. Control of enantioselective retention and resolution in liquid chromatography

Summary Several mobile phase parameters were investigated for controlling enantioselective retention and resolution on a chiral stationary phase made in-house. The chiral selector was the enzyme amyloglucosidase, which was immobilized onto a silica support via reductive amination. The influences of the mobile phase pH, concentration and type of uncharged organic modifier, ionic strength and column temperature on enantios-electivity were studied. The analysis time for resolving enantiomers could be adjusted with only a minor decrease in enantioselectivity by using a high ionic strength mobile phase buffer. This indicated a retention mechanism involving ion-exchange interactions. It was further confirmed by the decreasing enantioselectivity of amines when using a mobile phase pH below the isoelectric point of the native protein. Interesting effects were observed when the organic modifier concentration was increased and also when the column temperature was raised. Both retention and enantioselectivity increased with increasing concentration of 2-propanol in the mobile phase. Examples are given where both enantioselectivity and retention increased with increasing column temperature. Thermodynamic studies were performed to calculate the entropy and enthalpy constants. The results showed that, depending on mobile phase composition, the enantioselective retention may be caused by differences in entropy or enthalpy.     

电信运营商云计算业务发展研究

分析了电信运营商发展云计算业务的优势,研究了国内外主流电信运营商的云计算业务商用现状,给出电信运营商云计算业务发展建议.