一款不错的文件删除工具，支持彼得加特曼方法和美国国防部DoD 5220.22-M方法
标签： 软件
上传时间： 2019-04-30
上传用户：feekee
欢迎使用 FreeBSD！ 本手册适用于安装 FreeBSD 8.4-RELEASE 和 FreeBSD 9.2-RELEASE 以及它们的日常使用。 这个手册目前由很多人 持续地 维 护。 其中的内容需要不断地更新。 如果您有兴趣参加这个项目， 请发邮件到 FreeBSD 文档计划邮件列表。 此文档最新的英文原始版本可以从 FreeBSD 网 站 上获得 (本手册的较早期版本可以在 http://docs.FreeBSD.org/doc/ 找到)。 由 FreeBSD 中文计划 维护的最新译本可以在 FreeBSD 中文计划 快照网站 获得， 这一译本会持续地向主站同步。 此外， 您也可以从 FreeBSD FTP 服务器 及其 众多 镜像站点 取得这份文档的各种其它格式， 以及压缩形式的版本。 如果 您希望得到一份印刷版本的手册， 可以从 FreeBSD Mall 购买。 除此之外， 您还可以 在手册中搜索内容
上传时间： 2019-05-07
上传用户：shexiatang
MATLAB仿真飞行器编队算法
上传时间： 2019-05-14
上传用户：是丽丽啊
obot control, a subject aimed at making robots behave as desired, has been extensively developed for more than two decades. Among many books being published on this subject, a common feature is to treat a robot as a single system that is to be controlled by a variety of control algorithms depending on different scenarios and control objectives. However, when a robot becomes more complex and its degrees of freedom of motion increase substantially, the needed control computation can easily go beyond the scope a modern computer can handle within a pre-specified sampling period. A solution is to base the control on subsystem dynamics.
标签： decomposition virtual control
上传时间： 2019-09-04
上传用户：txb96
1/4-inch, 5-Megapixel SOC Image Sensor Optimized for High-Volume Mobile Markets
上传时间： 2019-09-29
上传用户：wsgq2019
针对永磁同步电机多个参数同时辨识时会出现欠秩的情况， 介绍了在 dq 坐标系下采用最小二乘法将多个参数分开辨识的方法。在硬件在环平台上采用该方法对电阻、电感和磁链进行了辨识。最后进一步考虑到电阻和磁链受温度的影响大， 进行了考虑温升的电阻和磁链的辨识。经验证， 该方法可以比较准确地辨识出电机参数。
上传时间： 2019-12-05
上传用户：ni952777
描述 分数a/b化为小数后，小数点后第n位的数字是多少？ 其中0 < a < b < 100，1≤n≤10000。 格式 输入格式 三个正整数a，b，n，相邻两个数之间用单个空格隔开。 输出格式 一个数字
标签： c语言
上传时间： 2020-05-03
上传用户：h149
In this paper we revisit hybrid analog-digital precoding systems with emphasis on their modelling and radio-frequency (RF) losses, to realistically evaluate their benefits in 5G system implementations. For this, we decompose the analog beamforming networks (ABFN) as a bank of commonly used RF components and formulate realistic model constraints based on their S-parameters. Specifically, we concentrate on fully-connected ABFN (FC-ABFN) and Butler networks for implementing the discrete Fourier TRANSforM (DFT) in the RF domain. The results presented in this paper reveal that the performance and energy efficiency of hybrid precoding systems are severely affected, once practical factors are considered in the overall design. In this context, we also show that Butler RF networks are capable of providing better performances than FC-ABFN for systems with a large number of RF chains.
标签： Analog-Digital Precoding Hybrid
上传时间： 2020-05-27
上传用户：shancjb
Before delving into the details of orthogonal frequency division multiplexing (OFDM), relevant background material must be presented first. The purpose of this chapter is to provide the necessary building blocks for the development of OFDM principles. Included in this chapter are reviews of stochastic and random process, discrete-time signals and systems, and the Discrete Fourier TRANSforM (DFT). Tooled with the necessary mathematical foundation, we proceed with an overview of digital communication systems and OFDM communication systems. We conclude the chapter with summaries of the OFDM wireless LAN standards currently in existence and a high-level comparison of single carrier systems versus OFDM.
上传时间： 2020-05-31
上传用户：shancjb
Part I provides a compact survey on classical stochastic geometry models. The basic models defined in this part will be used and extended throughout the whole monograph, and in particular to SINR based models. Note however that these classical stochastic models can be used in a variety of contexts which go far beyond the modeling of wireless networks. Chapter 1 reviews the definition and basic properties of Poisson point processes in Euclidean space. We review key operations on Poisson point processes (thinning, superposition, displacement) as well as key formulas like Campbell’s formula. Chapter 2 is focused on properties of the spatial shot-noise process: its continuity properties, its Laplace TRANSforM, its moments etc. Both additive and max shot-noise processes are studied. Chapter 3 bears on coverage processes, and in particular on the Boolean model. Its basic coverage characteristics are reviewed. We also give a brief account of its percolation properties. Chapter 4 studies random tessellations; the main focus is on Poisson–Voronoi tessellations and cells. We also discuss various random objects associated with bivariate point processes such as the set of points of the first point process that fall in a Voronoi cell w.r.t. the second point process.
标签： Stochastic Geometry Networks Wireless Volume and
上传时间： 2020-06-01
上传用户：shancjb
