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
上傳時間: 2015-06-09
上傳用戶:weixiao99
電力系統(tǒng)在臺穩(wěn)定計算式電力系統(tǒng)不正常運行方式的一種計算。它的任務(wù)是已知電力系統(tǒng)某一正常運行狀態(tài)和受到某種擾動,計算電力系統(tǒng)所有發(fā)電機能否同步運行 1運行說明: 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正常運行時的系統(tǒng)直軸等值電抗Xd 2故障運行時的系統(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 請輸入慣性時間常數(shù)Tj 請輸入時段數(shù)N 請輸入哪個時段發(fā)生故障Ni 請輸入每時段間隔的時間dt
標(biāo)簽: 電力系統(tǒng) 正 計算 運行
上傳時間: 2015-06-13
上傳用戶:it男一枚
We have a group of N items (represented by integers from 1 to N), and we know that there is some total order defined for these items. You may assume that no two elements will be equal (for all a, b: a<b or b<a). However, it is expensive to compare two items. Your task is to make a number of comparisons, and then output the sorted order. The cost of determining if a < b is given by the bth integer of element a of costs (space delimited), which is the same as the ath integer of element b. Naturally, you will be judged on the total cost of the comparisons you make before outputting the sorted order. If your order is incorrect, you will receive a 0. Otherwise, your score will be opt/cost, where opt is the best cost anyone has achieved and cost is the total cost of the comparisons you make (so your score for a test case will be between 0 and 1). Your score for the problem will simply be the sum of your scores for the individual test cases.
標(biāo)簽: represented integers group items
上傳時間: 2016-01-17
上傳用戶:jeffery
這是LLE的原始算法,原文的參考文獻是:S.T.Roweis and L.K.Saul. Nonlinear dimensionality reduction by locally linear embedding. Science, 290, 2000.
上傳時間: 2013-12-20
上傳用戶:蟲蟲蟲蟲蟲蟲
漢諾塔!!! Simulate the movement of the Towers of Hanoi puzzle Bonus is possible for using animation eg. if n = 2 A→B A→C B→C if n = 3 A→C A→B C→B A→C B→A B→C A→C
標(biāo)簽: the animation Simulate movement
上傳時間: 2017-02-11
上傳用戶:waizhang
本代碼為編碼開關(guān)代碼,編碼開關(guān)也就是數(shù)字音響中的 360度旋轉(zhuǎn)的數(shù)字音量以及顯示器上用的(單鍵飛梭開 關(guān))等類似鼠標(biāo)滾輪的手動計數(shù)輸入設(shè)備。 我使用的編碼開關(guān)為5個引腳的,其中2個引腳為按下 轉(zhuǎn)輪開關(guān)(也就相當(dāng)于鼠標(biāo)中鍵)。另外3個引腳用來 檢測旋轉(zhuǎn)方向以及旋轉(zhuǎn)步數(shù)的檢測端。引腳分別為a,b,c b接地a,c分別接到P2.0和P2.1口并分別接兩個10K上拉 電阻,并且a,c需要分別對地接一個104的電容,否則 因為編碼開關(guān)的觸點抖動會引起輕微誤動作。本程序不 使用定時器,不占用中斷,不使用延時代碼,并對每個 細分步數(shù)進行判斷,避免一切誤動作,性能超級穩(wěn)定。 我使用的編碼器是APLS的EC11B可以參照附件的時序圖 編碼器控制流水燈最能說明問題,下面是以一段流水 燈來演示。
標(biāo)簽: 代碼 編碼開關(guān)
上傳時間: 2017-07-03
上傳用戶:gaojiao1999
獲取計算機IP地址等網(wǎng)絡(luò)參數(shù) UDP聊天程序 TCP聊天程序 瀏覽器的實現(xiàn)
標(biāo)簽: 獲取計算機的名稱和IP地址 基本C/S模式的通信實驗
上傳時間: 2015-04-12
上傳用戶:scnbyh
基于FPGA的機器人視覺系統(tǒng)模塊的設(shè)計 關(guān)鍵字: 機器人 視覺系統(tǒng) 集成電路 FPGA 一、概述 視覺技術(shù)是近幾十年來發(fā)展的一門新興技術(shù)。機器視覺可以代替人類的視覺從事檢驗、目標(biāo)跟蹤、機器人導(dǎo)向等方面的工作,特別是在那些需要重復(fù)、迅速的從圖象中獲取精確信息的場合。盡管在目前硬件和軟件技術(shù)條件下,機器視覺功能還處于初級水平,但其潛在的應(yīng)用價值引起了世界各國的高度重視,發(fā)達國家如美國、日本、德國、法國等都投入了大量的人力物力進行研究,近年來已經(jīng)在機器視覺的某些方面獲得了突破性的進展,機器視覺在車輛安全技術(shù)、自動化技術(shù)等應(yīng)用中也越來越顯示出其重要價值。本文根據(jù)最新的CMOS圖像采集芯片設(shè)計了一種通用的視覺系統(tǒng)模塊,經(jīng)過編制不同的圖像處理、模式識別算法程序本模塊可以應(yīng)用到足球機器人,無人車輛等各種場合。
標(biāo)簽: FPGA的機器人視覺系統(tǒng)
上傳時間: 2015-04-25
上傳用戶:justgo123
NFS服務(wù)器實現(xiàn)文件共享
上傳時間: 2015-05-13
上傳用戶:yangkang1192
Use the fast Fourier transform function fft to analyse following signal. Plot the original signal, and the magnitude of its spectrum linearly and logarithmically. Apply Hamming window to reduce the leakage. . The hamming window can be coded in Matlab as for n=1:N hamming(n)=0.54+0.46*cos((2*n-N+1)*pi/N); end; where N is the data length in the FFT.
標(biāo)簽: matlab fft
上傳時間: 2015-11-23
上傳用戶:石灰?guī)r123
蟲蟲下載站版權(quán)所有 京ICP備2021023401號-1