北京大學(xué)ACM比賽題
The game of Scrabble is played with tiles. A tile either has a single letter written on it, or it is blank. In the latter case, the tile may be used to represent a letter of your choice. On your turn, you arrange the tiles to form a word. Each tile may be used at most once, but not all tiles need to be used. Given several Scrabble tiles and a dictionary, determine how many words in the dictionary can be formed using the given Scrabble tiles.
A technical trading system comprises a set of trading rules that can be used to generate trading signals. In general, a simple trading system has one or two parameters that determine the timing of trading signals. Each rule contained in a trading system is the results of parameterizations.
(Source: The Profitability of Technical Analysis: A Review by Cheol-Ho Park and Scott H. Irwin)
This demonstration models a flight control for the longitudinal motion of a Grumman Aerospace F-14 Tomcat. First order linear
approximations of the aircraft and actuator behavior are connected to an analog flight control design that uses the pilot s
stick pitch command as the set point for the aircraft s pitch attitude and uses aircraft pitch angle and pitch rate to determine commands. A simplified Dryden wind gust model is incorporated to perturb the system.
A semantic session analysis method partitioning Web usage logs is presented．Semantic W eb usage log preparation model enhances usage logs with semantic．The M arkov chain
mode1 based on ontology semantic measurement is used to identi．
ing which active session a request should belong to．The corn—
petitive method is applied to determine the end of the sessions．
Compared with other algorithms，more successfu1 sessions are additionally detected by semantic outlier analysis．
Java MP3 Player,
Here s a list of features:
- Reads, creates, updates, and removes id3v2.3 and id3v2.4 tags
- Reads, creates, updates, and removes id3v1 tags
- Extracts MPEG data such as bit rate, sample rate, channel mode, etc.
- Calculates playing time of mp3 from mpeg information (no good w/VBR)
- Can read and create Winamp styled playlists
- Offers other utility classes such as MP3FileFilter and MP3Comparator
- NullsoftID3GenreTable object keeps a list of genres for you and can
automatically determine the id3v1 genre from an id3v2 string or the
other way around
The DSKs or eZdspTM LF2407 and the DMC1500 make up a table top motor
development system which allows engineers and software developers to evaluate
certain characteristics of the TMS320F240, TMS320F243, and TMS320LF2407 DSPs
to determine if the processor meets the designers application requirements. Evaluators
can create software to execute onboard or expand the system in a variety of ways.
c pgm to find redundant paths in a graph.Many fault-tolerant network algorithms rely on an underlying assumption that there are possibly distinct network paths between a source-destination pair. Given a directed graph as input, write a program that uses depth-first search to determine all such paths. Note that, these paths are not vertex-disjoint i.e., the vertices may repeat but they are all edge-disjoint i.e., no two paths have the same edges. The input is the adjacency matrix of a directed acyclic graph and a pair(s) of source and destination vertices and the output should be the number of such disjoint paths and the paths themselves on separate lines. In case of multiple paths the output should be in order of paths with minimum vertices first. In case of tie the vertex number should be taken in consideration for ordering.
The purpose of this study is to explore the possibilities offered by current Artificial Neural Net(ANN) structures and topologies and determine their strengths and weaknesses.
P3.20. Consider an analog signal xa (t) = sin (2πt), 0 ≤t≤ 1. It is sampled at Ts = 0.01, 0.05,
and 0.1 sec intervals to obtain x(n).
b) Reconstruct the analog signal ya (t) from the samples x(n) using the sinc interpolation
(use ∆ t = 0.001) and determine the frequency in ya (t) from your plot. (Ignore the end
effects.)
C) Reconstruct the analog signal ya (t) from the samples x (n) using the cubic spline
interpolation and determine the frequency in ya (t) from your plot. (Ignore the end effects.)
