b tree how to operate on b tr
上传时间： 2014-01-20
上传用户：开怀常笑
convert numbers from h to d or b to h
上传时间： 2014-11-17
上传用户：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
标签： 9261 compatible pin-to-pin SAM
上传时间： 2014-01-07
上传用户：PresidentHuang
~{JGR 8vQ IzWwR5SC5D2V?bD#DbO5M3~} ~{3v?b~} ~{Hk?b~} ~{2iQ/5H9&D\~} ~{?IRTWw@)3d~} ~{TZ~}JDK1.4.2~{OBM(9}~}
上传时间： 2015-02-22
上传用户：ommshaggar
樣板 B 樹 ( B - tree ) 規則 : (1) 每個節點內元素個數在 [MIN,2*MIN] 之間, 但根節點元素個數為 [1,2*MIN] (2) 節點內元素由小排到大, 元素不重複 (3) 每個節點內的指標個數為元素個數加一 (4) 第 i 個指標所指向的子節點內的所有元素值皆小於父節點的第 i 個元素 (5) B 樹內的所有末端節點深度一樣
上传时间： 2017-05-14
上传用户：日光微澜
欧几里德算法：辗转求余 原理: gcd(a,b)=gcd(b,a mod b) 当b为0时,两数的最大公约数即为a getchar()会接受前一个scanf的回车符
上传时间： 2014-01-10
上传用户：2467478207
数据结构课程设计 数据结构B+树 B+ tree Library
上传时间： 2013-12-31
上传用户：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.
上传时间： 2013-10-23
上传用户：copu
PCB LAYOUT技术大全---初学者必看！ PROTEL相关疑问 1.原理图常见错误： （1）ERC报告管脚没有接入信号： a. 创建封装时给管脚定义了I/O属性; b.创建元件或放置元件时修改了不一致的grid属性,管脚与线没有连上; c. 创建元件时pin方向反向,必须非pin name端连线。 （2）元件跑到图纸界外：没有在元件库图表纸中心创建元件。 （3）创建的工程文件网络表只能部分调入pcb：生成netlist时没有选择为global。 （4）当使用自己创建的多部分组成的元件时,千万不要使用annotate. 2.PCB中常见错误： （1）网络载入时报告NODE没有找到： a. 原理图中的元件使用了pcb库中没有的封装; b. 原理图中的元件使用了pcb库中名称不一致的封装; c. 原理图中的元件使用了pcb库中pin number不一致的封装。如三极管：sch中pin number 为e,b,c, 而pcb中为1,2,3。
上传时间： 2013-10-20
上传用户：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
标签： government streamline important alphabet
上传时间： 2015-06-09
上传用户：weixiao99
