低功率宽带全向整流天线的几个问题

讨论了低功率密度宽带全向微波整流天线设计中的几个关键问题,包括低功率微波整流、整流天线、整流天线阵列等.研究表明,这种特殊的获取电磁能量的方式有可能在许多重要方面获得应用.     

C语言指针的运用及常见错误分析

首先阐述了指针在数组方面的应用,然后结合实例进一步分析指针并指出指针在运用中易犯的错误,同时给出有效的解决办法.     

基于阵列信号处理的波前重构技术

自适应光学波前重构和信号处理对精度和速度要求很高。介绍了目前常用的波前重构:区域法和模型法。针对常规方法中存在局部性和运算量大的问题,提出阵列信号处理方法在波前重构中的实现步骤,并讨论了工程实现的若干问题。     

日像仪干涉阵结构优化的加速压力算法

提出的加速压力算法是对Boone压力算法在解的质量和收敛速度两方面的改进,通过一次移动天线阵,可以完全消除阵元数目个uv采样点处的残差,使得每次迭代的uv分布修正量最大,从而不仅达到减小计算量的目的,而且使优化结果更加逼近理想模型.通过ALMA阵结构的优化与原有算法做了对比,验证了算法的有效性和高效性.最后,给出了中国国家天文台正在建设的日像仪干涉阵结构的仿真结果     

Phase locking dynamics in 2D Josephson junction arrays with external load

Phase locking in a basic two-dimensional hybrid Josephson junction array consisting of two rows and four columns shunted by an external load is investigated, exploiting an approximation combining the ideas of harmonic balance with that of the slowly varying phase procedure. Using small ring inductances, the junction voltages within the same row oscillate nearly in-phase unless the external magnetic flux in the loops is near a multiple of a quarter of the flux quantum. Without external load we have found a stable antiphase regime where both rows carry out uniform interferometer oscillations. A stable in-phase regime, favored in an optimized radiation source, can be reached by means of an external inductive shunt for small external fields only.     

基于MEMS技术的三维触觉感知阵列研究

本文设计了一种基于MEMS技术的柔性触觉感知阵列。通过将MEMS传感器单元与柔性基板相结合,实现三维曲面上的分布力的测量。该触觉感知阵列适台安装于智能机器人手爪上,为机器人系统高效率地获取物体形状、位置和姿态信息、实现智能操作物体提供了有效的手段。     

网络实验室管理系统的开发与实现

结合网络实验室实验教学的特点,阐述了开发网络实验室管理系统的设计思路、功能及技术特点,提出了网络实验逻辑机架的划分、远程网络教学实验及网络实验设备与实验终端(计算机)的绑定等新思路,并将其应用于管理系统中,成功地实现了网络实验从实验预约、实验过程到实验完毕后对实验设备的处理等方面的全智能化管理,提升了网络实验管理水平,减少人工干预,同时充分开放实验资源,提高了设备利用率。     

对C语言中指针的探讨

指针是C语言的一个难点。文中在分析了C语言中指针的定义、指针与简单变量的关系、指针与数组的关系、指针与函数的关系、指针与文件等知识的基础上,探讨了对C语言中指针的理解方法。     

Compact wideband microstrip array antenna with beam squint

A compact wideband microstrip array antenna with a squint beam is introduced without the matched load. Its measured beam is at 10° offset to the broadside with a measured gain of 12 dB at 10 GHz. The measured impedance bandwidth (voltage standing wave ratio (VSWR)⩽2) is over 16%, which agrees well with the simulated one. It is a low-cost wideband design with compact simple structure, suited for military and commercial application.     

Extending and analysis of X-Code

X-Code is one of the most important redundant array of independent disk (RAID)-6 codes which are capable of tolerating double disk failures. However, the code length of X-Code is restricted to be a prime number, and such code length restriction of X-Code limits its usage in the real storage systems. Moreover, as a vertical RAID-6 code, X-Code can not be extended easily to an arbitrary code length like horizontal RAID-6 codes. In this paper, a novel and efficient code shortening algorithm for X-Code is propo...