b tree how to operate on b tr
上傳時(shí)間： 2014-01-20
上傳用戶：開懷常笑
convert numbers from h to d or b to h
標(biāo)簽： convert numbers from to
上傳時(shí)間： 2014-11-17
上傳用戶：refent
The AT91SAM9261S is pin-to-pin compatible with the AT91SAM9261. Memory size available in this product is 16K bytes of SRAM and 32K bytes of ROM
標(biāo)簽： 9261 compatible pin-to-pin SAM
上傳時(shí)間： 2014-01-07
上傳用戶：PresidentHuang
~{JGR 8vQ IzWwR5SC5D2V?bD#DbO5M3~} ~{3v?b~} ~{Hk?b~} ~{2iQ/5H9&D\~} ~{?IRTWw@)3d~} ~{TZ~}JDK1.4.2~{OBM(9}~}
上傳時(shí)間： 2015-02-22
上傳用戶：ommshaggar
樣板 B 樹 ( B - tree ) 規(guī)則 : (1) 每個(gè)節(jié)點(diǎn)內(nèi)元素個(gè)數(shù)在 [MIN,2*MIN] 之間, 但根節(jié)點(diǎn)元素個(gè)數(shù)為 [1,2*MIN] (2) 節(jié)點(diǎn)內(nèi)元素由小排到大, 元素不重複 (3) 每個(gè)節(jié)點(diǎn)內(nèi)的指標(biāo)個(gè)數(shù)為元素個(gè)數(shù)加一 (4) 第 i 個(gè)指標(biāo)所指向的子節(jié)點(diǎn)內(nèi)的所有元素值皆小於父節(jié)點(diǎn)的第 i 個(gè)元素 (5) B 樹內(nèi)的所有末端節(jié)點(diǎn)深度一樣
上傳時(shí)間： 2017-05-14
上傳用戶：日光微瀾
歐幾里德算法：輾轉(zhuǎn)求余 原理: gcd(a,b)=gcd(b,a mod b) 當(dāng)b為0時(shí),兩數(shù)的最大公約數(shù)即為a getchar()會接受前一個(gè)scanf的回車符
標(biāo)簽： gcd getchar scanf mod
上傳時(shí)間： 2014-01-10
上傳用戶：2467478207
數(shù)據(jù)結(jié)構(gòu)課程設(shè)計(jì) 數(shù)據(jù)結(jié)構(gòu)B+樹 B+ tree Library
標(biāo)簽： Library tree 數(shù)據(jù)結(jié)構(gòu) 樹
上傳時(shí)間： 2013-12-31
上傳用戶：semi1981
All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, however, is very small, and can not be properly used in anapplication to suppress signal noise, and to shape slow rising/falling input transitions.Thus, it must be taken care that rising/falling input signals pass the undefined area of theTTL-specification between VIL and VIH with a sufficient rise/fall time, as generally usualand specified for TTL components (e.g. 74LS series: gates 1V/us, clock inputs 20V/us).The effect of the implemented Schmitt-Trigger is that even if the input signal remains inthe undefined area, well defined low/high levels are generated internally. Note that allinput signals are evaluated at specific sample points (depending on the input and theperipheral function connected to it), at that signal transitions are detected if twoconsecutive samples show different levels. Thus, only the current level of an input signalat these sample points is relevant, that means, the necessary rise/fall times of the inputsignal is only dependant on the sample rate, that is the distance in time between twoconsecutive evaluation time points. If an input signal, for instance, is sampled throughsoftware every 10us, it is irrelevant, which input level would be seen between thesamples. Thus, it would be allowable for the signal to take 10us to pass through theundefined area. Due to the sample rate of 10us, it is assured that only one sample canoccur while the signal is within the undefined area, and no incorrect transition will bedetected. For inputs which are connected to a peripheral function, e.g. capture inputs, thesample rate is determined by the clock cycle of the peripheral unit. In the case of theCAPCOM unit this means a sample rate of 400ns @ 20MHz CPU clock. This requiresinput signals to pass through the undefined area within these 400ns in order to avoidmultiple capture events.For input signals, which do not provide the required rise/fall times, external circuitry mustbe used to shape the signal transitions.In the attached diagram, the effect of the sample rate is shown. The numbers 1 to 5 in thediagram represent possible sample points. Waveform a) shows the result if the inputsignal transition time through the undefined TTL-level area is less than the time distancebetween the sample points (sampling at 1, 2, 3, and 4). Waveform b) can be the result ifthe sampling is performed more than once within the undefined area (sampling at 1, 2, 5,3, and 4).Sample points:1. Evaluation of the signal clearly results in a low level2. Either a low or a high level can be sampled here. If low is sampled, no transition willbe detected. If the sample results in a high level, a transition is detected, and anappropriate action (e.g. capture) might take place.3. Evaluation here clearly results in a high level. If the previous sample 2) had alreadydetected a high, there is no change. If the previous sample 2) showed a low, atransition from low to high is detected now.
標(biāo)簽： Signal Input Fall Rise
上傳時(shí)間： 2013-10-23
上傳用戶：copu
PCB LAYOUT技術(shù)大全---初學(xué)者必看！ PROTEL相關(guān)疑問 1.原理圖常見錯(cuò)誤： （1）ERC報(bào)告管腳沒有接入信號： a. 創(chuàng)建封裝時(shí)給管腳定義了I/O屬性; b.創(chuàng)建元件或放置元件時(shí)修改了不一致的grid屬性,管腳與線沒有連上; c. 創(chuàng)建元件時(shí)pin方向反向,必須非pin name端連線。 （2）元件跑到圖紙界外：沒有在元件庫圖表紙中心創(chuàng)建元件。 （3）創(chuàng)建的工程文件網(wǎng)絡(luò)表只能部分調(diào)入pcb：生成netlist時(shí)沒有選擇為global。 （4）當(dāng)使用自己創(chuàng)建的多部分組成的元件時(shí),千萬不要使用annotate. 2.PCB中常見錯(cuò)誤： （1）網(wǎng)絡(luò)載入時(shí)報(bào)告NODE沒有找到： a. 原理圖中的元件使用了pcb庫中沒有的封裝; b. 原理圖中的元件使用了pcb庫中名稱不一致的封裝; c. 原理圖中的元件使用了pcb庫中pin number不一致的封裝。如三極管：sch中pin number 為e,b,c, 而pcb中為1,2,3。
上傳時(shí)間： 2013-10-20
上傳用戶：kbnswdifs
The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d . Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet. Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1. Definition
標(biāo)簽： government streamline important alphabet
上傳時(shí)間： 2015-06-09
上傳用戶：weixiao99
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