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MODIFIED
8700
SOP16P/23+
原裝現(xiàn)貨
MODIFIED
28800
SOP16P/22+
原裝現(xiàn)貨，提供配單服務(wù)
MODIFIED
5000
SOP16P/2019+
原裝歡迎詢價(jià)
MODIFIED
46620
SOP16/21+
低價(jià)出售原裝現(xiàn)貨可看貨假一罰十
MODIFIED
60701
SOP16P/24+
深圳原裝現(xiàn)貨，可看貨可提供拍照
MODIFIED
48000
SOP16P/24+
原裝現(xiàn)貨，可開專票，提供賬期服務(wù)
MODIFIED
521010
NR/2017+
-
MODIFIED
6608
SOP16P/2024+
現(xiàn)貨假一罰萬(wàn)只做原裝現(xiàn)貨
MODIFIED
8391
SOP16P/22+
特價(jià)現(xiàn)貨，提供BOM配單服務(wù)
MODIFIED
521010
NR/2017+
-
MODIFIED
500
SOP16P/8
原裝正品現(xiàn)貨
MODIFIED
5000
A/N/22+
一站式配單，只做原裝
MODIFIED
41101
SOP16P/-
大量現(xiàn)貨，提供一站式配單服務(wù)
MODIFIED
8000
SOP16P/22+
原裝現(xiàn)貨，配單能手
MODIFIED
23412
SOP16P/23+
提供一站式配單服務(wù)
MODIFIED
82100
SOP16P/15+
-
MODIFIED
3000
SOP16P/2019+
原裝 部分現(xiàn)貨量大期貨
MODIFIED
2000
SOP16P/2024+
原廠原裝現(xiàn)貨庫(kù)存支持當(dāng)天發(fā)貨
MODIFIED
5000
SOP16P/23+
優(yōu)勢(shì)產(chǎn)品大量庫(kù)存原裝現(xiàn)貨
s pts confirm, it should reset or reject the card.the parameters for the transmission of the pts request and pts confirm shall correspond to those used within the answer to reset regarding the bit rate and the convention detected by ts and possibly modified by tc1.2.3.5.b - structure and content of pts request and pts confirmthe pts request and pts response each consist of one initial character ptss, followed by a format character pts0, three optional parameter characters pts1 pts2 pts3, and a characte
*************************************************************") "call append(1,"#") call append(1," * author : yangshuo") "call append(3,"#") call append(2," * email : ys@farsight.com.cn") "call append(5,"#") call append(3," * last modified : ".strftime("%y-%m-%d %h:%m")) "call append(7,"#") call append(4," * filename : ".expand("%:t")) "call append(9,"#") call append(5," * description : ") "call append(11,"#") call append(6," * ***************************************
其配套開發(fā)工具lambdatool。由于所使用的工具版本沒有實(shí)現(xiàn)目標(biāo)服務(wù)器（target server）的調(diào)試方式，因此對(duì)物理端口的使用采用的獨(dú)占方式，即調(diào)試工具不能與其它工具共享同一端口。我們可以用網(wǎng)絡(luò)試上載并啟動(dòng)目標(biāo)應(yīng)用程序，而通過串口傳送覆蓋信息。5.2 對(duì)deltacore的覆蓋測(cè)試過程及結(jié)果對(duì)于函數(shù)內(nèi)部，logiscope支持的覆蓋策略有：*指令塊ibs(instruction blocks)*判斷到判斷的路徑ddps(decision-to-decision paths)*mcdc（modified condition/decision）在項(xiàng)目層次上支持的覆蓋策略是：*過程到過程路徑ppp（procedure-to-procedure path）在deltacore的測(cè)試中，我們采用了較為常用的覆蓋策略——判斷到判斷的路徑，其含義是：ddp是一個(gè)指令序列，它的起點(diǎn)是函數(shù)或判斷（if，while，……）的入口點(diǎn)，它的出口是下一個(gè)函數(shù)或判斷的退出點(diǎn)，之間不能再有判斷，比如在圖5中包含了5個(gè)ddps：測(cè)試的具體過程是：①利用插裝分析器對(duì)deltacore的源代碼進(jìn)行插裝，并生成插裝信息文件。②將
最小碼距。 1.2 rs（255，223）碼譯碼原理 由于rs碼為分組碼，所以其譯碼算法主要由伴隨式計(jì)算、關(guān)鍵方程求解和錢搜索和forney算法3部分構(gòu)成，譯碼器結(jié)構(gòu)如圖1所示。 首先，根據(jù)接收碼字乘以校驗(yàn)矩陣得到其伴隨多項(xiàng)式，對(duì)于rs（225，223）碼，其伴隨式求解式可以表示為： 求得伴隨式以后，則利用伴隨多項(xiàng)式求解關(guān)鍵方程：錯(cuò)誤位置多項(xiàng)式σ（x）和錯(cuò)誤特征多項(xiàng)式ω（x），如下所示： 求解關(guān)鍵方程現(xiàn)可采用的算法主要有bm（belekamp-messey）算法和me（modified euclidean）算法。之后便得到錯(cuò)誤位置多項(xiàng)式σ（x）與錯(cuò)誤特征多項(xiàng)式ω（x）。 此后，由錯(cuò)誤位置多項(xiàng)式與錯(cuò)誤特征多項(xiàng)式來(lái)求得錯(cuò)誤位置與錯(cuò)誤值。求解錯(cuò)誤位置本設(shè)計(jì)采用窮舉算法——錢搜索算法來(lái)完成。同時(shí)，使用forney公式求得錯(cuò)誤值。最后，用延時(shí)后的接收值減去錯(cuò)誤值，得到最后的譯碼輸出。forney公式可以表示為： 其中，ei代表發(fā)生在i位置上的錯(cuò)誤值，σodd（x）代表錯(cuò)誤位置多項(xiàng)式奇數(shù)次項(xiàng)之和。 2 并行流水結(jié)構(gòu)方案 本設(shè)計(jì)采用8倍并行流水方案。將255個(gè)碼元8倍并行
ｏｗ ｒｅｑｕｉｒｅｍｅｎｔ． ｄｕｅ ｔｏ ｓｕｃｈ ｄｉｓａｄｖａｎｔａｇｅｓ ａｓ ｈｉｇｈ ｇｒｏｗｔｈ ｔｅｍｐｅｒａｔｕｒｅ ａｎｄ ｐｏｏｒ ｃｒｙｓｔａｌ ｑｕａｌｉｔｙ，ｉｔ ｉｓ ｂｅｉｎｇ ｒｅｐｌａｃｅｄ ｂｙ ｓｕｂｓｅｑｕｅｎｔ ｔｅｃｈｎｉｑｕｅｓ ｓｕｃｈ ａｓ ｌｅｌｙ ｍｅｔｈｏｄ，ｍｏｄｉｆｉｅｄ ｌｅｌｙ ｍｅｔｈｏｄ ａｎｄ ｃｖｄ ｅｐｉｔａｘｙ ｍｅｔｈｏｄ．3.1.2 sic prepared by the lely method and the modified lely methodｔｈｅ ｃｒｙｓｔａｌ ｓｉｃ ｆｏｒｍｅｄ ｂｙ ｌｅｌｙ ｍｅｔｈｏｄ（ｆｉｇ．４）ｈａｓ ｇｒｅａｔｌｙ ｉｍｐｒｏｖｅｄ ｃｒｙｓｔａｌ ｑｕａｌｉｔｙ，ｂｕｔ ｉｔｓ ｇｒｏｗｔｈ ｒａｔｅ ｉｓ ｒａｔｈｅｒ ｌｏｗ，ａｎｄ ｔｈｅ ｔｙｐｅ ｏｆ ｔｈｅ ｃｒｙｓｔａｌ ｃａｎｎｏｔ ｂｅ ｃｏｎｔｒｏｌｌｅｄ． ｎｏｗａｄａｙｓ ｓｉｃ ｆｏｒｍｅｄ ｂｙ ｔｈｉｓ ｍｅｔｈｏｄ ｉｓ ｕｓｕａｌｌｙ ｕｓｅｄ ａｓ ｓｕｂｓｔｒａｔｅ ｔｏ ｏｂｔａｉｎ
海力士半導(dǎo)體（hynix）宣布，將與斗山電子（doosan electro-materials）共同開發(fā)可縮小半導(dǎo)體印刷電路板（pcb）體積近25%的新pcb原料。利用此技術(shù)，使用tenting（蓬蓋式）制程也可縮小半導(dǎo)體封裝基板的銅線路線寬近25%，至25μm，也將可使pcb基板面積隨之縮小。為實(shí)現(xiàn)25μm的線寬，已采用msap（modified semi-addictive process）制法，然此制法存在較原始方法制程復(fù)雜且困難，所需費(fèi)用也增加20%的問題。 海力士和斗山為解決此問題，決定共同開發(fā)新原料及適合的制作方法。新原料在使用tenting制程進(jìn)行蝕刻時(shí)，可將原料表面粗糙發(fā)生機(jī)率降至最低，使其可呈現(xiàn)微細(xì)的線路，雙方公司也已針對(duì)此制法共同申請(qǐng)專利。 海力士半導(dǎo)體常務(wù)高光惪表示，本開發(fā)打破業(yè)者對(duì)于既有方式不可行的固有觀念，透過與斗山的合作解決技術(shù)上的問題。使用此技術(shù)將可成功實(shí)現(xiàn)封裝基板超微細(xì)線路，并大幅提升高附加價(jià)值產(chǎn)品的價(jià)格競(jìng)爭(zhēng)力。 斗山將提供此新原料給pcb業(yè)者，pcb業(yè)者預(yù)計(jì)自2010年7月起可開始量產(chǎn)相關(guān)產(chǎn)品并提供給海力士。
stract:in this paper, a new method is presented, which is available for determining the complex permittivity ε and qf of dielectric thin film, whose thickness is less than 1μm. the method is based on cavity perturbation theory and has been specially modified for thin film measurement. experiment results show that the measurement's precision is good and could be improved by taking some modification , which will be present at the end of this article. key words:dielectric thin film, complex permittivity,
歐盟09年3月上旬發(fā)布的電工標(biāo)準(zhǔn)目錄 標(biāo)準(zhǔn)號(hào) 英文題目 中文題目 技術(shù)機(jī)構(gòu) 發(fā)布日期 適用指令 en 61249-2-35:2009 materials for printed boards and other interconnecting structures——part 2-35: reinforced base materials, clad and unclad - modified epoxide woven e-glass laminate sheets of defined flammability (vertical burning test), copper-clad for lead-free assembly 印制板和其它互連材料結(jié)構(gòu)——第2-35部分:覆箔和未覆箔基材--規(guī)定了燃燒性的改良環(huán)氧e玻璃布覆箔和未覆箔層壓板（垂直燃燒法），無(wú)鉛組裝件用 clc/sr 91 2009-03-11 en 61754-25:2009 fibre optic connector interfaces——part 25: typ
德國(guó)材料生產(chǎn)商vamp tech spa advanced modified polymers推出了一種新型導(dǎo)電性pa-6,6產(chǎn)品，專門設(shè)計(jì)的用來(lái)防止靜電放電。這種新材料名為vampamid 66 0675v0 black st，表面阻抗達(dá)103至104 ohm/m2，并符合阻燃性u(píng)l94 v-0阻燃要求。它可用于生產(chǎn)用于具有爆炸危險(xiǎn)的房間、機(jī)器和工廠部件。例如，它已被mellert slt有限公司(德國(guó))選擇生產(chǎn)為危險(xiǎn)領(lǐng)域開發(fā)的led手電筒外殼。 歡迎轉(zhuǎn)載，信息來(lái)自維庫(kù)電子市場(chǎng)網(wǎng)（udpf.com.cn）
d based onlinear prediction）法。這種方法只需修改常數(shù)項(xiàng)a0，而a本身仍按傳統(tǒng)的快速算法求取。1.2 修正ovss譜估計(jì)方法 由于只考慮一個(gè)正弦波，根據(jù)文獻(xiàn)［3］，知道p階信號(hào)自相關(guān)函數(shù)矩陣r的最大特征值對(duì)應(yīng)的最大特征矢量u1為唯一的信號(hào)特征矢量，基于它可以構(gòu)造一個(gè)與信號(hào)矢量正交的矢量，或者由u1構(gòu)造一個(gè)橫向?yàn)V波器，使該濾波器在f＝f1處形成零點(diǎn)。 定義 這里不需由u1構(gòu)造一個(gè)v陣［1］，因此也不需要進(jìn)行奇異值（svd）分解，大大降低了計(jì)算量。因此該修正ovss（modified orthogonal vectorspectralestimation based on autocorrelation matrixsignal－subspace——movss）譜估計(jì)方法譜計(jì)算公式可寫成包括步驟： （1）根據(jù)測(cè)量數(shù)據(jù)計(jì)算自相關(guān)系數(shù)。 （2）求p維自相關(guān)矩陣的最大特征值對(duì)應(yīng)的特征向量。 （3）用（23）式計(jì)算信號(hào)功率譜。 可以看出，該方法計(jì)算量很小且p只要大于2即可，而且可以看出正交方法與snr沒有直接關(guān)系，只要有一定的數(shù)據(jù)長(zhǎng)度，頻率估計(jì)的準(zhǔn)確性極高，譜線極窄
rce code and do-it-yourself. let get the sdcc for dos command line, sdcc for 8051. unzip the package and save to drive c. i made the folder app (application programs) for my source code. here is the new source code for sdcc, xtimer1.c timer4 is now modified to be delay off output. the counting is now based on minute the same as timer1 and 2. timer3 still be hour counting based. i have made the opto-relay for big load switching. figure 3: opto-relay for output4(active low).the opto-transistor can be an
complete schematic, orcad pcb layout of easy-downloader v1.1 and modified firmware with sdcc. i am very happy to use sdcc for writing firmware of my project. the compiled code is very compact and nice. after i succeeded writing a new firmware of xtimer and easy-downloader v1.1 with sdcc. i cannot stop preparing a new page that gives the idea how to use sdcc and of course it's time to renovate my old project with orcad. for now i can design the hardware, draw a schematic, write the firmware an
graduate school;** http://www.zlgmcu.com;**;**--------------file info-------------------------------------------------------------------------------;** file name: startup.s;** last modified date: 2004-09-17;** last version: 1.0;** descriptions: the start up codes for lpc2100, including the initializing codes for the entry point of exceptions and the stacks of user tasks.;** every project should have a in
graduate school;** http://www.zlgmcu.com;**;**--------------file info-------------------------------------------------------------------------------;** file name: startup.s;** last modified date: 2004-09-17;** last version: 1.0;** descriptions: the start up codes for lpc2200, including the initializing codes for the entry point of exceptions and the stacks of user tasks.;** every project should have a in
graduate school;** http://www.zlgmcu.com;**;**--------------file info-------------------------------------------------------------------------------;** file name: startup.s;** last modified date: 2004-09-17;** last version: 1.0;** descriptions: the start up codes for lpc2200, including the initializing codes for the entry point of exceptions and the stacks of user tasks.;** every project should have a in
graduate school;** http://www.zlgmcu.com;**;**--------------file info-------------------------------------------------------------------------------;** file name: startup.s;** last modified date: 2004-09-17;** last version: 1.0;** descriptions: the start up codes for lpc2100, including the initializing codes for the entry point of exceptions and the stacks of user tasks.;** every project should have a in
used global variables: none** calling modules: none**** created by: winfeng** created date: 2005/07/12**-------------------------------------------------------------------------------------------------------** modified by:** modified date:**------------------------------------------------------------------------------------------------------********************************************************************************************************/extern uint8 initi
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