战争形态演进及战斗力生成模式思考

从战斗力生成模式概念出发,对人类历史中战争形态的特点、演进过程和阶段划分进行了研究;将当前机械化战争向未来信息化战争转变时期内的战争进行了细分;同时,从该角度重新审视了美军二战以来所处的不同战争阶段,并分析了不同阶段下美军军事信息系统的构建思路。     

一种天波雷达多径扩展多普勒杂波抑制方法

该文分析了天波超视距雷达(Over The Horizon Radar, OTHR)多径扩展多普勒杂波(Spread Doppler Clutter, SDC)的产生机理。由于阵列存在幅相误差且期望信号的功率大于SDC功率,自适应数字波束形成(Adaptive Digital Beam Forming, ADBF)将降低SDC抑制能力,同时还会导致信号对消,严重降低信噪比。针对以上问题,该文提出一种自适应抑制SDC的方法。该方法首先采用改进噪声子空间拟合自校正法消除阵列幅相误差,得到期望信号和SDC准确的到达仰角,然后采用正交投影权矢量进行ADBF处理,避免了强期望信号条件下ADBF权矢量估计不准的问题。理论分析和仿真实验表明该方法能够较彻底地抑制多径SDC。     

探究电视话语重构

在互联网热点事件一天几次刷新话题的今天,电视作为大众传媒统领话语的时代似乎一去不复返.电视话语权是否旁落,在新媒体时代又如何重构？本文通过电视媒体与互联网的对比来探讨这个问题.     

光子晶体双波长电光调制和模分复用集成器件

为了实现光电子器件小型化和多功能化,进一步提高信息传输容量和速度,提出了一种基于光子晶体双波长电光调制和模分复用的片上集成器件。该集成器件的电光调制模块由硅基光子晶体波导和两个L3型复合腔组成,模分复用模块由硅基非对称平行纳米线波导组成,两个模块的连接处采用硅基光子晶体波导。采用L3型复合腔和PN掺杂结构实现两个波长TE₀模的调制,采用非对称定向耦合结构将两个波长的TE₀模转换为TE₁模。应用基于三维时域有限差分法（3D-Finite Difference Time Domain,3D-FDTD）的Lumerical软件进行仿真分析,结果表明,在调制电压为1.05 V时,该集成器件可以实现中心波长为1 552.1 nm和1 556.1 nm的 TE₀模、TE₁模通断调制及两模式模分复用功能。该器件的消光比高达24.67 dB,调制深度均为0.99,插入损耗小于0.57 dB,信道串扰小于?34.68 dB,调制速率最低为17.54 GHz。该集成器件结构紧凑,可望应用于高速大容量光通信系统。     

Cu CMP工艺中新型低pH碱性抛光液稳定性的研究

Abstract： The stability of a novel low-pH alkaline slurry （marked as slurry A, pH = 8.5） for copper chemical mechanical planarization was investigated in this paper. First of all, the stability mechanism of the alkaline slurry was studied. Then many parameters have been tested for researching the stability of the slurry through comparing with a traditional alkaline slurry （marked as slurry B, pH = 9.5）, such as the pH value, particle size and zeta potential. Apart from this, the stability of the copper removal rate, dishing, erosion and surface roughness were also studied. All the results show that the stability of the novel low-pH alkaline slurry is better than the traditional alkaline slurry. The working-life of the novel low-pH alkaline slurry reaches 48 h.     

新型碱性精抛液对300mm铜膜全局平坦化的影响

The copper removal rate and uniformity of two types copper slurries were investigated, which was performed on the 300 mm chemical mechanical planarization （CMP） platform. The experiment results illustrate that the removal rate of the two slurries is nearly the same. Slurry A is mainly composed ofa FA/OI1 type chelating agent and the uniformity reaches to 88.32%. While the uniformity of slurry B is 96.68%, which is mainly composed of a FA/OV type chelating agent. This phenomenon demonstrates that under the same process conditions, the uniformity of different slurries is vastly different. The CMP performance was evaluated in terms of the dishing and erosion values. In this paper, the relationship between the uniformity and the planarization was deeply analyzed, which is mainly based on the endpoint detection mechanism. The experiment results reveal that the slurry with good uniformity has low dishing and erosion. The slurry with bad uniformity, by contract, increases Cu dishing significantly and causes copper loss in the recessed region. Therefore, the following conclusions are drawn： slurry B can improve the wafer leveling efficiently and minimize the resistance and current density along the line, which is helpful to improve the device yield and product reliability. This investigation provides a guide to improve the uniformity and achieve the global and local planarization. It is very significant to meet the requirements for 22 nm technology nodes and control the dishing and erosion efficiently.     

VANET 中一种安全消息拥塞控制机制

针对车辆无线自组织网络在车流量密度大的情况下,周期性安全消息产生的Beacons可能占据整个信道带宽,从而导致信道拥塞的问题,提出了一种基于调整Beacon频率和车辆通信半径的拥塞控制机制。该机制首先为周期性安全消息和突发事件安全消息提出了一个信道分配算法,将周期性安全消息在信道中占用的带宽资源限定在一定的门限以下,保证有足够的信道资源传输突发事件安全消息。然后,在保证车辆用户安全的条件下,根据精确性要求和成功接收率,动态地调整Beacon频率和车辆通信半径,来控制信道中能够容纳的用户数,避免信道拥塞。     

LINK11_SLEW信号的非协同解调

根据LINK11_SLEW信号的波形协议和帧结构,先对复杂信道下的LINK11_SLEW信号进行一次模拟解调,再采用相关同步算法、重构前导序列测频算法、平均自适应滤波的信道均衡( AFA)算法和最佳采样点鉴相解扰算法进行二次解调,理论推导和计算仿真表明,复杂信道下采用常规解调方式无法有效解调的 LINK11_SLEW 信号,采用新算法解调星座图在10符号之内达到收敛,在Eb/N0高于12 dB的情况下,解调误码率小于10-3。     

电力大数据质量评价模型及动态探查技术研究

针对电力数据数量多、种类庞杂、横跨专业多等特点而引起的数据质量不高的现状,该项目以数据中心数据为研究对象,通过分析产生数据质量问题的原因,以元数据、数据质量、数据建模等理论为基础,对数据流动过程中的质量检查、质量控制和质量评估等进行深入的研究。构建电力大数据质量评价指标体系,研究电力大数据质量实时监控、快速动态检测方法与关键技术,提出了适合于电力大数据数据质量控制与评估体系模型,实现数据质量管控平台开发,确保企业数据质量,提升数据应用价值。     

单片机控制系统的设计与调试方法

单片机由于功能强大、体积小、可靠性高而被广泛应用,单片机控制系统的设计是单片机控制技术的核心。文章分析了单片机控制系统的结构、硬件和软件设计和系统调试等环节,并依据工作经验给出了调试的方法。