城市设计实践的反思与转机

始于1960年代的现代城市设计实践经历了大约40年的路程,在世界许多城市对环境的改善和城市活力的恢复发挥了很大作用。但确实也有一些城市设计由于过于追求“城市美”,而缺乏人的尺度与具有生活感的城市设计视点。在当今许多后工业化社会的城市中,城市由成长转变为成熟,为了恢复和增强城市的活力,强化城市的特色和魅力成为城市设计必须追求的目标。今后的城市设计实践应从形式化的城市美思想脱壳,坚持人的尺度,实现具有生活感的城市设计。     

吉林省电网SCADA系统的结构及特点

从技术上对吉林省电网调度自动化系统(即SCADA系统)的配置、结构、功能等方面进行了分析论证。运行实践证明:这套系统的结构先进、功能实用、可维护性好、可扩充性强,具有很高的性能价格比。在保证电网安全稳定运行等方面取得了良好效益,提高了吉林省电网的调度自动化水平。     

纳豆的营养保健作用及制作技术

纳豆营养丰富，保健价值极高。它具有防止骨质疏松、抑制高血糖、溶解血栓、抗菌消毒、预防高血压、抗癌等功能，本丈对纳豆的营养成分、生理功能、食用方法作一综述，并介绍了纳豆的制作工艺技术。     

Information and Arena: The Dual Function of the News Media for Political Elites

How do individual politicians use the news media to reach their political goals? This study addresses the question by proposing an actor‐centered, functional approach. We distinguish 2 essential functions (and subfunctions) the mass media have for political elites. The media are a source of information; politicians depend on it for pure information and they can profit from the momentum generated by media information. The media also are an arena elites need access to in order to promote themselves and their issues. These 2 functions offer certain politicians a structural advantage over others and, hence, are relevant for the power struggle among political elites. A systematic functional account enables comparisons of the role of the media across politicians and political systems.     

Functions classification approach to generate reconfigurable fine-grain logic based on Ambipolar Independent Double Gate FET (Am-IDGFET)

Am-IDGFET is a new family of particular devices in view of the fact that it associates three benefits: (i) it is usually a 1-D electronic device (CNT or SiNW), meaning high mobility, achievable current density and high I_ON/I_OFF ratio; (ii) Independently controlled gates which offers the device extra logic options; (iii) ambipolar behaviour opens the way for N- and P-type polarities in the same device via its back gate. The creativity of this work consists of looking at this new class of emerging technology as an opportunity for new design paradigms with no equivalent counterparts in CMOS technology. Nevertheless, to build a feasible and complete picture of ambipolar logic, innovative design approaches and tools are required. In this paper, we exploit functional classification, a powerful tool for the construction and analysis of Boolean functions, to build reconfigurable logic blocks by defining a hierarchical correlation between structures of functions classes with ambipolar devices. We demonstrate how this approach enables us to build Am-I DGFET-based n-input reconfigurable cells. Several dynamically reconfigurable 2-inputs logic cells with partial and full functionality are designed in this paper. We evaluate the performances of circuits designed from this approach in a case study focused on Double Gate Carbon Nanotube FET (DG-CNTFET) technology. Simulations results show efficiency to build fine grain reconfigurable cells with partial functionality. In the case of 9-functions reconfigurable cell, an improvement of 1.8X in terms of power delay product (PDP) is proved when compared to a CMOS-16 nm technology. Fewer control signals are required and the area is reduced by 35% over CMOS technology.     

椭圆球面函数频域调制解调方法

针对基于椭圆球面波函数(PSWFs)的非正弦时域调制算法复杂度高的不足,该文引入空间映射,分析了PSWFs信号频域完备正交性,推导出PSWFs信号频域有效表示所需最小抽样点数。在此基础上,引入复数域映射、FFT/IFFT信号处理框架,提出PSWFs频域调制解调方法。该方法将PSWFs信号处理由时域拓展到频域,在频域进行信息加载与检测,为探索研究PSWFs信号在5G、超5G等采用频域信号处理的通信系统中的应用提供了可能。理论和数值分析表明,相对于PSWFs时域调制,所提方法将能够在不改变系统频带利用率、系统误码性能、调制信号能量聚集性以及信号峰均功率比的前提下,显著降低算法复杂度,将运算复杂度由O(2Qg²)降低为O(g²+glog₂g)。

     

搭建基于labview的xPC目标实时仿真系统控制平台

介绍了实时控制系统平台xPC Target,并且研究了如何在xPC目标环境下构建实时仿真测试系统。研究了xPC目标的C API接口编程及其API函数以及labview如何调用DLL动态链接库,建立了基于labview的xPC宿主机控制及遥测平台,该平台用于某卫星的姿轨控半物理仿真系统的地面验证,为其提供了功能强大并富于人性化的人机交互接口,实际应用表明该控制平台完全可以实现对xPC目标机程序的控制。     

A comprehensive Auxiliary Functions of Generalized Scattering Matrix (AFGSM) method to determine bandgap characteristics of periodic structures

A comprehensive Auxiliary Functions of Generalized Scattering Matrix (AFGSM) method is presented on the bandgap analysis of periodic structures encountered in many engineering applications. Proposed method accurately determines the bandgaps of periodic structures with symmetric and asymmetric unit cells. In order to test the feasibility of the proposed method, numerical results are compared with Eigenvalue method (EIV) and HFSS/CST frequency domain simulations. The validity and applicability of the presented method are demonstrated by analysing the bandgap characteristics of periodically dielectric loaded rectangular waveguides, photonic crystals, helix Slow Wave Structures (SWSs) of Traveling Wave Tubes (TWTs) and excellent agreements on the simulation results are obtained. Bandgap analysis and design of different periodic structure problems can be effectively achieved using the proposed AFGSM method.     

NFV中单节点启发式资源分配方法

从网络包转发性能角度出发,通过实验深入分析DPDK对虚拟网络功能的加速效果及CPU资源消耗情况,并对单节点资源分配问题进行研究,证明了该问题是NP难类型,提出了基于贪心算法的启发式VNF资源分配算法。在此基础上,针对网络负载的潮汐现象,提出了一种基于网络负载的虚拟网络功能实例自动切换方案。实验结果显示,相较传统方式,该方案在高负载情况下VNF性能提升了20%。     

简论超高压变电站自动化系统的发展策略

章根据超高压变电站自动化的实践,对其包含的六要内容及功能进行讨论,对超高压变电站自动化实施过程中的几个问题作了说明。