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BI-directional

Abstract - A ﬂ exible multiscale and directional representation for images is proposed. The s

Abstract - A ﬂ exible multiscale and directional representation for images is proposed. The scheme combines directional ﬁ lter banks with the Laplacian pyramid to provides a sparse representation for two- dimensional piecewise smooth signals resembling images. The underlying expansion is a frame and can be designed to be a tight frame. Pyramidal directional ﬁ lter banks provide an effective method to implement the digital curvelet transform. The regularity issue of the iterated ﬁ lters in the directional ﬁ lter bank is examined.

標(biāo)簽： representation directional multiscale Abstract

上傳時(shí)間： 2013-12-15

上傳用戶：zxc23456789
Bi-density twin support vector machines

In this paper we present a classifier called bi-density twin support vector machines (BDTWSVMs) for data classification. In the training stage, BDTWSVMs first compute the relative density degrees for all training points using the intra-class graph whose weights are determined by a local scaling heuristic strategy, then optimize a pair of nonparallel hyperplanes through two smaller sized support vector machine (SVM)-typed problems. In the prediction stage, BDTWSVMs assign to the class label depending on the kernel density degree-based distances from each test point to the two hyperplanes. BDTWSVMs not only inherit good properties from twin support vector machines (TWSVMs) but also give good description for data points. The experimental results on toy as well as publicly available datasets indicate that BDTWSVMs compare favorably with classical SVMs and TWSVMs in terms of generalization

標(biāo)簽： recognition Bi-density machines support pattern vector twin for

上傳時(shí)間： 2019-06-09

上傳用戶：lyaiqing
Tableau：數(shù)據(jù)可視化之極速BI

Tableau：數(shù)據(jù)可視化之極速BI，書籍及釋義

標(biāo)簽： Tableau 數(shù)據(jù) 可視化

上傳時(shí)間： 2020-05-11

上傳用戶：starnny
基于TMS320F2808的高效雙向DCDC變換器.rar

雙向DC/DC變換器（BI-directionalDC/DCconverters）是能夠根據(jù)需要調(diào)節(jié)能量雙向傳輸?shù)闹绷?直流變換器。隨著科技的發(fā)展，雙向DC/DC變換器的應(yīng)用需求越來越多，正逐步應(yīng)用到無軌電車、地鐵、列車、電動車等直流電機(jī)驅(qū)動系統(tǒng)，直流不間斷電源系統(tǒng)，航天電源等場合。一方面，雙向DC/DC變換器為這些系統(tǒng)提供能量，另一方面，又使可回收能量反向給供電端充電，從而節(jié)約能量。大多數(shù)雙向DC/DC變換器采用復(fù)雜的輔助網(wǎng)絡(luò)來實(shí)現(xiàn)軟開關(guān)技術(shù)，本文所研究的Buck/Boost雙向的DC/DC變換器從拓?fù)渖辖鉀Q器件軟開關(guān)的問題；由于Buck/Boost雙向DC/DC變換器的電流紋波較大，這會帶來嚴(yán)重的電磁干擾，本文結(jié)合Buck/Boost雙向DC/DC變換器拓?fù)渑c磁耦合技術(shù)使電感電流紋波減??；由于在同一頻率下不同負(fù)載時(shí)電流紋波不同，本文在控制時(shí)根據(jù)負(fù)載改變PWM頻率，從而使輕載時(shí)的電流紋波均較小。本文所研究的雙向DC/DC變換器采用DSP處理器進(jìn)行控制，其原因在于：目前沒有專門用于控制該Buck/Boost雙向DC/DC變換器的控制芯片，而DSP具有多路的高分辨率PWM，通過對DSP寄存器的配置可以實(shí)現(xiàn)Buck/Boost雙向DC/DC變換器的控制PWM；DSP具有多路高速的A/D轉(zhuǎn)換接口，并可以通過配合PWM完成對反饋采樣，具備一定的濾波功能。本文所研究的數(shù)字雙向DC/DC變換器實(shí)現(xiàn)了在Buck模式下功率MOSFET的零電壓開通及零電壓關(guān)斷，電感電流的交迭使其電感輸出端電流紋波明顯變小，輕載時(shí)PWM頻率的提升也使得電流紋波變小。

標(biāo)簽： F2808 2808 320F DCDC

上傳時(shí)間： 2013-06-08

上傳用戶：cy_ewhat
FET430PIF自制資料

The MSP-FET430PIF is a Parallel Port interface (does not include target board) that is used to program and debug MSP430 FET tools and test boards through the JTAG interface. This interface is included in our FET tools, but sold without the development board. This interface uses a Parallel PC Port to communicate to the Debugger Software (IAR Kickstart software included) running on the PC. The interface uses the standard 14 pin header to communicate to the MSP430 device using the standard JTAG protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is extremely low power, no external power supply is required. The tool has an integrated software environment and connects directly to the PC which greatly simplifies the set-up and use of the tool. The flash development tool supports development with all MSP430 flash parts. Features MSP430 debugging interface to connect a MSP430-Flash-device to a Parallel port on a PC Supports JTAG debug protocol (NO support for Spy-Bi-Wire (2-wire JTAG) debug protocol, Spy-Bi-Wire (2-wire JTAG) is supported by MSP-FET430UIF) Parallel Port cable and a 14-conductor target cable Full documentation on CD ROM Integrated IAR Kickstart user interface which includes: Assembler Linker Limulator Source-level debugger Limited C-compiler Technical specifications: Backwardly compatable with existing FET tool boards.

標(biāo)簽： FET 430 PIF

上傳時(shí)間： 2013-10-26

上傳用戶：fengweihao158@163.com
MSP430 USB JTAG自制資料

The MSP-FET430U14 is a powerful flash emulation tool to quickly begin application development on the MSP430 MCU. It includes USB debugging interface used to program and debug the MSP430 in-system through the JTAG interface or the pin saving Spy Bi-Wire (2-wire JTAG) protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is ultra-low power, no external power supply is required. The debugging tool interfaces the MSP430 to the included integrated software environment and includes code to start your design immediately. The MSP-FET430UIF development tools supports development with all MSP430 flash devices

標(biāo)簽： JTAG MSP 430 USB

上傳時(shí)間： 2013-10-28

上傳用戶：13691535575
arm指令集(1)

arm指令集(1) 　ARM跳轉(zhuǎn)指令可以從當(dāng)前指令向前或向后的32MB地址空間跳轉(zhuǎn)。這類跳轉(zhuǎn)指令有以下4種。　　（1）B 跳4專指令　　B〔條件）（地址）　　B指令屬于ARM指令集，是最簡單的分支指令。一旦遇到一個B指令，ARM處理器將立即跳轉(zhuǎn)到給定的地址，從那里繼續(xù)執(zhí)行。注意：存儲在分支指令中的實(shí)際值是相對當(dāng)前R15的值的一個偏移量，而不是一個絕對地址。它的值由匯編器來計(jì)算，是24位有符號數(shù)，左移兩位后有符號擴(kuò)展為32位，表示的有效偏移位為26位（＋／－ 32 MB）。　?。?）BL 帶返回的跳轉(zhuǎn)指令　　BI，〔條件）（地址）　　BL指令也屬于ARM指令集，是另一個分支指令。就在分支之前，在寄存器R14中裝載上R15的內(nèi)容，因此可以重新裝載R14到R15中來返回到這個分支之后的那個指令處執(zhí)行，它是子例程的一個基本但強(qiáng)力的實(shí)現(xiàn)。　?。?）BLX 帶返回和狀態(tài)切換的跳轉(zhuǎn)指令　　BLX ＜地址＞　　BLX指令有兩種格式，第1種格式的BLX指令記作BLX（1）。BLX（1）從ARM指令集跳轉(zhuǎn)到指令中指定的目標(biāo)地址，并將程序狀態(tài)切換到Thumb狀態(tài)，該指令同時(shí)將PC寄存器的內(nèi)容復(fù)制到LR寄存器中。　　BLX（1）指令屬于無條件執(zhí)行的指令。　　第2種格式的BLX指令記作BLX（2）。BLX（2）指令從ARM指令集跳轉(zhuǎn)到指令中指定的目標(biāo)地址，目標(biāo)地址的指令可以是ARM指令，也可以是Thumb指令。目標(biāo)地址放在指令中的寄存器＜dest＞中，該地址的bit［0］值為0，目標(biāo)地址處的指令類型由CPSR中的T位決定。該指令同時(shí)將PC寄存器的內(nèi)容復(fù)制到LR寄存器中。　?。?）BX 帶狀態(tài)切換的跳轉(zhuǎn)指令　　BX（條件）（dest）　　BX指令跳轉(zhuǎn)到指令中指定的目標(biāo)地址，目標(biāo)地址處的指令可以是ARM指令，也可以是Thumb指令。目標(biāo)地址值為指令的值和0xFl·FFFFFF做“與”操作的結(jié)果，目標(biāo)地址處的指令類型由寄存器決定。

標(biāo)簽： arm 指令集

上傳時(shí)間： 2014-12-27

上傳用戶：laomv123
亞惠快餐管理信息系統(tǒng) 包括亞惠快餐管理的各項(xiàng)功能

亞惠快餐管理信息系統(tǒng) 包括亞惠快餐管理的各項(xiàng)功能，含BI分析

標(biāo)簽： 管理信息系統(tǒng)

上傳時(shí)間： 2013-12-19

上傳用戶：gxf2016
電力系統(tǒng)在臺穩(wěn)定計(jì)算式電力系統(tǒng)不正常運(yùn)行方式的一種計(jì)算。它的任務(wù)是已知電力系統(tǒng)某一正常運(yùn)行狀態(tài)和受到某種擾動

電力系統(tǒng)在臺穩(wěn)定計(jì)算式電力系統(tǒng)不正常運(yùn)行方式的一種計(jì)算。它的任務(wù)是已知電力系統(tǒng)某一正常運(yùn)行狀態(tài)和受到某種擾動，計(jì)算電力系統(tǒng)所有發(fā)電機(jī)能否同步運(yùn)行 1運(yùn)行說明：請輸入初始功率S0，形如a+bi 請輸入無限大系統(tǒng)母線電壓V0 請輸入系統(tǒng)等值電抗矩陣B 矩陣B有以下元素組成的行矩陣 1正常運(yùn)行時(shí)的系統(tǒng)直軸等值電抗Xd 2故障運(yùn)行時(shí)的系統(tǒng)直軸等值電抗X d 3故障切除后的系統(tǒng)直軸等值電抗請輸入慣性時(shí)間常數(shù)Tj 請輸入時(shí)段數(shù)N 請輸入哪個時(shí)段發(fā)生故障Ni 請輸入每時(shí)段間隔的時(shí)間dt

標(biāo)簽： 電力系統(tǒng) 正計(jì)算運(yùn)行

上傳時(shí)間： 2015-06-13

上傳用戶：it男一枚
電力系統(tǒng)靜態(tài)穩(wěn)定計(jì)算一般采用小干擾法

電力系統(tǒng)靜態(tài)穩(wěn)定計(jì)算一般采用小干擾法，即首先計(jì)算近似的線性微分方程組系數(shù)矩陣的特征根。然后根據(jù)特征根在復(fù)平面上的特性，判別電力系統(tǒng)運(yùn)行的穩(wěn)定性操作說明：請輸入初始功率S0，形如a+bi 請輸入無限大系統(tǒng)母線電壓V0 請輸入系統(tǒng)直軸等值電抗的大小Xd 請輸入同步電角速度請輸入慣性時(shí)間常數(shù)Tj 請輸入綜合阻尼系數(shù)D

標(biāo)簽： 電力系統(tǒng) 干擾計(jì)算

上傳時(shí)間： 2013-12-17

上傳用戶：zhengzg