8點基二fft
Fast Fourier Transform (FFT).
Using 8 points, takes about 1.2 ms to execute one FFT.
Sets up General Purpose Timer 1 to generate events at 10 kHz.
Will produce 10 kHz output on T1PWM and T1PWM pins.
The book "The Finite Difference Time Domain for Electromagnetics" by Karl Kunz and Raymond Luebbers, CRC Press, 1993, contains an FDTD code and output files in Appendix B. The same code and output files are contained in this directory.
PIECEWISE_EVAL: evaluates a piecewise function of x
usage: y = PIECEWISE_EVAL(x,breakpoints,funs)
arguments (input)
x - vector or array of points to evaluate though the function
breakpoints - list of n breakpoints, -inf and +inf are implicitly
ACM試題An Easy Problem
Description
As we known, data stored in the computers is in binary form. The problem we discuss now is about the positive integers and its binary form. Given a positive integer I, you task is to find out an integer J, which is the minimum integer greater than I, and the number of 1 s in whose binary form is the same as that in the binary form of I. For example, if "78" is given, we can write out its binary form, "1001110". This binary form has 4 1 s. The minimum integer, which is greater than "1001110" and also contains 4 1 s, is "1010011", i.e. "83", so you should output "83".
本文簡要介紹了集成電路MAX038的性能，并給出了以MAX038波形產生器為核心具有四種輸出波形的函數
信號發生器的設計方案。用這種方法設計的信號發生器具有結構簡單、成本低、體積小等特點，很好地滿足
了一般的實驗要求。
關鍵詞：集成電路 信號發生器 頻率
Abstract：The performance ofIC_MAX038 was introduced briefly in this paper．At the sa／ne time，a signal generator design making
with integrated circuit MAX038 is provided，which can produce four kinds of waveforms output．The signal generator
was of characters such as simple structur，cheap expense，small volume and SO on．The signal generator contents the
demand of general experiments very wel1．
Key words：Integrated circuit Signal generator Frequency
This project attempts to implement a Database using B+Tree. The project has developed a DATABASE SYSTEM with lesser memory consumption. Its API includes simple SQL Statements and the output is displayed on the screen. Certain applications for which several features of existing databases like concurrency control, transaction management, security features are not enabled. B+Trees can be used as an index for factor access to the data. Help facility is provided to know the syntax of SQL Statements.
