jschwinger233

fun = {@(x)sum(-x.*sin(sqrt(abs(x))), 2),
       @(x)sum(x.^2-10*cos(2*pi*x)+10,2),
       @(x)-20*exp(-0.2*sqrt(sum(x.^2,2)/30))-exp(sum(cos(2*pi*x),2)/30)+20+exp(1),
       @(x)sum(x.^4-16*x.^2+x,2)/100,
       @(x)sum((1-x(:,1:end-1)).^2 + 100*(x(:,2:end)-x(:,1:end-1).^2).^2,2),
       @(x)sum(x.^2,2),
       @(x)sum(x.^4,2)+rand(size(x, 1),1),
       @(x)sum(abs(x),2)+prod(abs(x),2),
       @(x)max(abs(x), [], 2)};
lb = {-500*ones(1, 30),

jschwinger233

f = xlsread('C:\Documents and Settings\Administrator\桌面\恒定流-非恒定流关系图.xls')
fun = @(x, xdata)xdata(:, 3).* xdata(:, 4).^ x(1).* xdata(:, 5).^x(2).*xdata(:, 6).^ x(3)* x(4);
lsqcurvefit(fun, rand(4, 1), f, f(:, 2))

%% output
-1.99891623025666
0.627151427841047
-0.0645792624367950
8.20564570528408

jschwinger233

pe3

@time for i = 1:10
    factor(600851475143)|>keys|>maximum|>println
end

pe4

function pe4()

jschwinger233

We couldn’t find that file to show.

jschwinger233

package main

import (
	"flag"
	"fmt"
	"io"
	"time"
)

func newReader() io.Reader {

jschwinger233

package main

import (
	"fmt"
	"time"
)

type e struct{}

func chanErr(produceErr bool, d time.Duration, noErrChan chan e) chan e {

jschwinger233

#!/usr/bin/python
# -*- coding: utf-8 -*-
import os
import codecs
import random
import string
from hashlib import md5
from multiprocessing import Pool
PROCESSES = 10
LENGTH = 8192*5+777

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/*
   rm -f /tmp/out.txt && gcc cwrite.c && ./a.out $BUFSIZE $LINELEN --fbf  && cat out.txt | while read l; do echo ${#l}; done | sort -u
   */

#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>

jschwinger233

import os
import sys


def main():
    line = 'x' * (int(sys.argv[1]) - 1) + '\n'
    buf_mode = {'--nbf': 0, '--lbf': 1, '--fbf': 2}[sys.argv[2]]

    for _ in range(10):
        pid = os.fork()

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package main

import (
	"bufio"
	"flag"
	"fmt"
	"log"
	"net/http"
	_ "net/http/pprof"
	"os"