一款不錯的文件刪除工具，支持彼得加特曼方法和美國國防部DoD 5220.22-M方法
標簽： 軟件
上傳時間： 2019-04-30
上傳用戶：feekee
歡迎使用 FreeBSD！ 本手冊適用于安裝 FreeBSD 8.4-RELEASE 和 FreeBSD 9.2-RELEASE 以及它們的日常使用。 這個手冊目前由很多人 持續地 維 護。 其中的內容需要不斷地更新。 如果您有興趣參加這個項目， 請發郵件到 FreeBSD 文檔計劃郵件列表。 此文檔最新的英文原始版本可以從 FreeBSD 網 站 上獲得 (本手冊的較早期版本可以在 http://docs.FreeBSD.org/doc/ 找到)。 由 FreeBSD 中文計劃 維護的最新譯本可以在 FreeBSD 中文計劃 快照網站 獲得， 這一譯本會持續地向主站同步。 此外， 您也可以從 FreeBSD FTP 服務器 及其 眾多 鏡像站點 取得這份文檔的各種其它格式， 以及壓縮形式的版本。 如果 您希望得到一份印刷版本的手冊， 可以從 FreeBSD Mall 購買。 除此之外， 您還可以 在手冊中搜索內容
上傳時間： 2019-05-07
上傳用戶：shexiatang
MATLAB仿真飛行器編隊算法
上傳時間： 2019-05-14
上傳用戶：是麗麗啊
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.
標簽： decomposition virtual control
上傳時間： 2019-09-04
上傳用戶：txb96
1/4-inch, 5-Megapixel SOC Image Sensor Optimized for High-Volume Mobile Markets
上傳時間： 2019-09-29
上傳用戶：wsgq2019
針對永磁同步電機多個參數同時辨識時會出現欠秩的情況， 介紹了在 dq 坐標系下采用最小二乘法將多個參數分開辨識的方法。在硬件在環平臺上采用該方法對電阻、電感和磁鏈進行了辨識。最后進一步考慮到電阻和磁鏈受溫度的影響大， 進行了考慮溫升的電阻和磁鏈的辨識。經驗證， 該方法可以比較準確地辨識出電機參數。
上傳時間： 2019-12-05
上傳用戶：ni952777
描述 分數a/b化為小數后，小數點后第n位的數字是多少？ 其中0 < a < b < 100，1≤n≤10000。 格式 輸入格式 三個正整數a，b，n，相鄰兩個數之間用單個空格隔開。 輸出格式 一個數字
標簽： c語言
上傳時間： 2020-05-03
上傳用戶：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.
標簽： Analog-Digital Precoding Hybrid
上傳時間： 2020-05-27
上傳用戶：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.
上傳時間： 2020-05-31
上傳用戶：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.
標簽： Stochastic Geometry Networks Wireless Volume and
上傳時間： 2020-06-01
上傳用戶：shancjb
