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(hù)：weixiao99
交通信號(hào)燈的控制： 1． 通過(guò)8255A并口來(lái)控制LED發(fā)光二極管的亮滅。 2． A口控制紅燈，B口控制黃燈，C口控制綠燈。 3． 輸出為0則亮，輸出為1則滅。 4． 用8253定時(shí)來(lái)控制變換時(shí)間 。 要求：設(shè)有一個(gè)十字路口，1、3為南，北方向，2、4為東西方向，初始態(tài)為4個(gè)路口的紅燈全亮。之后，1、3路口的綠燈亮，2、4路口的紅燈亮，1、3路口方向通車(chē)。延遲30秒后，1、3路口的綠燈熄滅，而1，3路口的黃燈開(kāi)始閃爍（1HZ）。閃爍5次后，1、3路口的紅燈亮，同時(shí)2、4路口的綠燈亮，2、4路口方向開(kāi)始通車(chē)。延遲30秒時(shí)間后，2、4路口的綠燈熄滅，而黃燈開(kāi)始閃爍。閃爍5次后，再切換到1、3路口方向。之后，重復(fù)上述過(guò)程。
標(biāo)簽： 8255A 控制 LED 交通信號(hào)燈
上傳時(shí)間： 2014-01-03
上傳用戶(hù)：zhouli
A one-dimensional calibration object consists of three or more collinear points with known relative positions. It is generally believed that a camera can be calibrated only when a 1D calibration object is in planar motion or rotates around a ¯ xed point. In this paper, it is proved that when a multi-camera is observing a 1D object undergoing general rigid motions synchronously, the camera set can be linearly calibrated. A linear algorithm for the camera set calibration is proposed，and then the linear estimation is further re¯ ned using the maximum likelihood criteria. The simulated and real image experiments show that the proposed algorithm is valid and robust.
標(biāo)簽： one-dimensional calibration collinear consists
上傳時(shí)間： 2014-01-12
上傳用戶(hù)：璇珠官人
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(shí)間： 2016-01-17
上傳用戶(hù)：jeffery
1) Write a function reverse(A) which takes a matrix A of arbitrary dimensions as input and returns a matrix B consisting of the columns of A in reverse order. Thus for example, if A = 1 2 3 then B = 3 2 1 4 5 6 6 5 4 7 8 9 9 8 7 Write a main program to call reverse(A) for the matrix A = magic(5). Print to the screen both A and reverse(A). 2) Write a program which accepts an input k from the keyboard, and which prints out the smallest fibonacci number that is at least as large as k. The program should also print out its position in the fibonacci sequence. Here is a sample of input and output: Enter k>0: 100 144 is the smallest fibonacci number greater than or equal to 100. It is the 12th fibonacci number.
標(biāo)簽： dimensions arbitrary function reverse
上傳時(shí)間： 2016-04-16
上傳用戶(hù)：waitingfy
The LM628/LM629 are dedicated motion-control processors designed for use with a variety of DC and brushless DC servo motors
標(biāo)簽： motion-control processors dedicated designed
上傳時(shí)間： 2014-01-23
上傳用戶(hù)：aa17807091
1． 通過(guò)8255A并口來(lái)控制LED發(fā)光二極管的亮滅。 2． A口控制紅燈，B口控制黃燈，C口控制綠燈。 3． 輸出為0則亮，輸出為1則滅。 4． 用8253定時(shí)來(lái)控制變換時(shí)間 。
上傳時(shí)間： 2013-12-06
上傳用戶(hù)：cccole0605
Visual tracking is one of the key components for robots to accomplish a given task in a dynamic environment, especially when independently moving objects are included. This paper proposes an extension of Adaptive Visual Servoing (hereafter, AVS) for unknown moving object tracking. The method utilizes binocular stereo vision, but does not need the knowledge of camera parameters. Only one assumption is that the system need stationary references in the both images by which the system can predict the motion of unknown moving objects. The basic ideas how we extended the AVS method such that it can track unknown moving objects are given and formalized into a new AVS system. The experimental results with proposed control architecture are shown and a discussion is given.
標(biāo)簽： components accomplish tracking dynamic
上傳時(shí)間： 2013-12-11
上傳用戶(hù)：lizhen9880
Java is the first language to provide a cross-platform I/O library that is powerful enough to handle all these diverse tasks. Java is the first programming language with a modern, object-oriented approach to input and output. Java s I/O model is more powerful and more suited to real-world tasks than any other major language used today. Java I/O is the first and still the only book to fully expose the power and sophistication of this library.
標(biāo)簽： cross-platform language powerful provide
上傳時(shí)間： 2014-01-07
上傳用戶(hù)：pompey
該程序?qū)崿F(xiàn)兩個(gè)機(jī)器人在一個(gè)二維網(wǎng)格中的自動(dòng)追捕。通過(guò)方向鍵手動(dòng)控制機(jī)器人A走步，機(jī)器人B根據(jù)設(shè)定的追捕或逃避方式自動(dòng)對(duì)機(jī)器人A進(jìn)行追捕或逃避。
上傳時(shí)間： 2017-08-31
上傳用戶(hù)：pkkkkp
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