針對(duì)運(yùn)行中火車測(cè)速運(yùn)用多普勒效應(yīng)采用DSP 設(shè)計(jì)雷達(dá)測(cè)速系統(tǒng)并闡述了其基本設(shè)計(jì)思想與工作原理給出系統(tǒng)硬件軟件設(shè)計(jì)結(jié)構(gòu)和原理圖改善了原有光電測(cè)速精度提高了系統(tǒng)工作穩(wěn)定性和可靠性經(jīng)實(shí)驗(yàn)證明DSP 采集板工作穩(wěn)定測(cè)速效果好關(guān)鍵詞DSP; 雷達(dá)測(cè)速; 多普勒效應(yīng) On Board DSP-Based Radar Speed Measurement System TANG Wei, SUN Zhi-fang, CHEN Quan (Dept.of computer Science,Yangtze University,Jingzhou 434023,China)Abstract: This paper presents a DSP-based train speed measurement by using Doppler radar. The structure of the system is introduced.The hardware and software are also discussed.Key words: DSP; rader speed measurement; doppler principle
標(biāo)簽： DSP 車載 系統(tǒng)設(shè)計(jì) 雷達(dá)測(cè)速
上傳時(shí)間： 2013-10-27
上傳用戶：003030
Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.
標(biāo)簽： EMI 開關(guān)電源 英文
上傳時(shí)間： 2013-11-16
上傳用戶：萍水相逢
對(duì)于信號(hào)的奇異性檢測(cè)，也是一個(gè)道理。 ％ 小波變換用于奇異檢測(cè) ％ 編程人: 沙威(Wei Sha) 安徽大學(xué)(Anhui University) ws108@ahu.edu.cn
上傳時(shí)間： 2014-01-06
上傳用戶：我干你啊
清華大學(xué)第二版，xin yun Wei ma suxia 等人
標(biāo)簽： 清華大學(xué)
上傳時(shí)間： 2014-12-04
上傳用戶：semi1981
It about c++ senior traing course. it very usefull for someone who want to enhance c++ programing. it comes frome hua Wei company s traning course
標(biāo)簽： programing enhance someone usefull
上傳時(shí)間： 2016-11-21
上傳用戶：杜瑩12345
alter table tbl_name add col_name type 例如,給表增加一列Weight mysql>alter table pet add Weight int 刪除列 alter table tbl_name drop col_name 例如，刪除列Weight： mysql>alter table pet drop Weight 改變列 alter table tbl_name modify col_name type 例如，改變Weight的類型： mysql> alter table pet modify Weight samllint 另一種方法是： alter table tbl_name change old_col_name col_name type 例如： mysql> alter table pet change Weight Weight samllint 給列更名 mysql>alter table pet change Weight Wei 給表更名 alter table tbl_name rename new_tbl 例如，把pet表更名為animal mysql>alter table pet rename animal
標(biāo)簽： Weight alter table add
上傳時(shí)間： 2013-12-06
上傳用戶：離殤
精度除法函數(shù)。 調(diào)用函數(shù)，并輸入被除數(shù)、除數(shù)和精確到小數(shù)點(diǎn)后多少位。即可得到商的整數(shù)部分和小數(shù)部分。 /*************************精度除法函數(shù)********************************/ //======================================================================== // 函數(shù): Void chufa(unsigned long beichushu,unsigned long chushu, unsigned char Wei) // 描述: 精度除法 // 參數(shù): unsigned long beichushu, 被除數(shù) // unsigned long chushu, 除數(shù) // unsigned char Wei 精確到小數(shù)點(diǎn)后多少位 // 返回: 無. // 版本: V1.0, 2017-8-3 //========================================================================
標(biāo)簽： 單片機(jī) 函數(shù) 精度 除法
上傳時(shí)間： 2018-04-16
上傳用戶：qibao9891
基于LabVIEW2012FPGA模式的數(shù)據(jù)采集和存儲(chǔ)系統(tǒng)摘 要：為了提高數(shù)據(jù)采集系統(tǒng)精度，減少開發(fā)成本，提高開發(fā)效率，基于LabVIEW虛擬儀器開發(fā)工具研究并設(shè)計(jì)了一 種數(shù)據(jù)采集系統(tǒng)。該系統(tǒng)采用FPGA編程模式和網(wǎng)絡(luò)流技術(shù)實(shí)現(xiàn)大批量數(shù)據(jù)實(shí)時(shí)傳輸，并對(duì)數(shù)據(jù)進(jìn)行分析處理和存儲(chǔ)。系 統(tǒng)硬件采用美國NI實(shí)時(shí)控制器CRIO?9025，實(shí)現(xiàn)16路數(shù)據(jù)可靠采集與存儲(chǔ)。實(shí)驗(yàn)仿真及實(shí)際運(yùn)行結(jié)果表明該數(shù)據(jù)采集系 統(tǒng)能夠精確地對(duì)數(shù)據(jù)進(jìn)行實(shí)時(shí)采集以及分析處理，達(dá)到了項(xiàng)目要求。 關(guān)鍵詞：FPGA；FIFO；網(wǎng)絡(luò)流；數(shù)據(jù)采集系統(tǒng)；SQL數(shù)據(jù)庫 中圖分類號(hào)：TN98?34 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1004?373X（2014）14?0142?04 Data acquisition and storage system based on LabVIEW 2012FPGA pattern WANG Shu?dong1,2 ，Wei Kong?zhen1 ，LI Xiao?pei1 （1. College of Electrical and Information Engineering，Lanzhou University of Technology，Lanzhou 730050，China； 2. Gansu Key Laboratory for Advanced Industrial Process Control，Lanzhou 730050，China）
標(biāo)簽： labview fpga 數(shù)據(jù)采集
上傳時(shí)間： 2022-02-18
上傳用戶：
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