24СʱÈÈÃŰæ¿éÅÅÐаñ    

²é¿´: 2275  |  »Ø¸´: 10
±¾Ìû²úÉú 1 ¸ö ³ÌÐòÇ¿Ìû £¬µã»÷ÕâÀï½øÐв鿴
µ±Ç°Ö»ÏÔʾÂú×ãÖ¸¶¨Ìõ¼þµÄ»ØÌû£¬µã»÷ÕâÀï²é¿´±¾»°ÌâµÄËùÓлØÌû

zhmdream

ľ³æ (ÕýʽдÊÖ)

[ÇóÖú] MatlabÁ½¸öСÎÊÌâ

ÄúºÃ£¬Çë½ÌÁ½¸öÎÊÌ⣺
£¨1£©ÎÒÓÃMatlab½âÒ»¸öÒ»Ôª4´Î·½³Ì£¬µÃµ½4¸ö½â¡£Ôõô²ÅÄÜÈÃÆäÊä³öÎÒÏëÒªµÄʵÊý½â£¬ÈçµÚÒ»¸ö½â£¨»òÕß½âµÄÌõ¼þÂú×㣺y>400)¡£

y =
  1.0e+002 *
   4.3541         
   2.9607         
  -3.6574 + 5.2191i
  -3.6574 - 5.2191i

(2)µÚ2¸öÎÊÌâÊÇÔÚµÚ1¸öÎÊÌâ»ù´¡Éϵġ£ÎÒµÄÄ¿µÄÊÇΪÁË»­³öxÓëyµÄ¹ØÏµÍ¼£¬ËùÒÔÎÒ±ØÐëµÃ¶ÔÁ¬ÐøµÄx½øÐÐÇó½â£¬È»ºóÇó³öy£¬×÷ͼ¡£ÒÔÒ»¸ö¼òµ¥Àý×Ó°É£º

x=1:1:10; %xÈ¡1µ½10
syms y;
a=y+1;
b=y-1;

f=a*b+a+b*x+y+6*x+2

%½â·½³Ìf=0
equation = [char(f) ' = ' num2str(0,9)];
A=solve(equation, 'y')

double(A)

plot(x,y)

µ«ÊÇÔËÐгö´í¡£ÓÐûÓÐÆäËû·½·¨¿ÉÒÔ½â¾ö£¿Ð»Ð»£¡
»Ø¸´´ËÂ¥

» ÊÕ¼±¾ÌûµÄÌÔÌûר¼­ÍƼö

ѧº£ÎÞÑÄ£¡ matlabµäÐͰ¸Àý¼°Ð¡¼¼ÇÉ ´ó¿ªÑÛ½ç

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÈËÉúÈçÃΣ¬ËêÔÂÎÞÇé~~~
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhmdream

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
5Â¥: Originally posted by sudo at 2011-10-13 20:28:33:
»¹ÊÇÌù³öÄãµÄÈ«²¿³ÌÐò°É

ÏÂÃæÊÇÊäÈëµÄ²ÎÊý£º

ÊäÈëÆ½Ì¨ÏµÍ³²ÎÊý
Ì«Ñô¹âÎüÊÕÍ¿²ã¿í¶Èd(m):0.06
²£Á§¹ÜµÄÖ±¾¶D(m):0.12
·´Éä¾µ¿í¶È(m):3
ƽ̨ϵͳ³¤¶È(m):6
Ì«Ñô¹âÑ¡ÔñÎüÊÕÍ¿²ãµÄ·øÉäÂÊ:0.05
²£Á§µÄ·øÉäÂÊ:0.2
·´Éä¾µµÄ·øÉäÂÊ:0.2
ÀäÈ´¹Ü±³²¿µÄ·øÉäÂÊ:0.2
ÀäÈ´¹Ü±³²¿µÄÎüÊÕÂÊ:0.8
ÊäÈëÖÜΧ»·¾³²ÎÊý
ÖÜΧ»·¾³·çËÙ(m/s):1.5
»·¾³¿ÕÆøÎ¶ÈTa(K)£º300
ÀäÈ´¹ÜζÈTc(K):323
ÈËÉúÈçÃΣ¬ËêÔÂÎÞÇé~~~
7Â¥2011-10-14 10:54:29
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
²é¿´È«²¿ 11 ¸ö»Ø´ð

sudo

ľ³æ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï ¡ï
xzhdty(½ð±Ò+2): »¶Ó­³£À´³ÌÐòÓïÑÔ¿´¿´ 2011-10-12 15:31:47
΢³¾¡¢ÃÎÏë(½ð±Ò+2, ³ÌÐòÇ¿Ìû+1): sudo×ÜÊǺÜÈÈÐĵģ¬×£¸£Å¶£¡ 2011-10-12 20:41:46
zhmdream(½ð±Ò+40): лл°¡£¬ÎÒÊÔÊÔ 2011-10-12 20:45:04
zhmdream(½ð±Ò+10): ллÁË£¬ºÇºÇ 2011-10-14 22:14:37
Äã²»ÓÃÿ´Î¶¼·ÅÄÇô¶à·ÖÉÏÀ´µÄ...

(1)ʹÓÃisrealº¯ÊýºÍÑ­»·
CODE:
for i=1:length(y)
    if isreal(y(i)) && y(i)>400 %ÅжÏy(i)ÊÇ·ñÊÇʵÊý£¬²¢ÇÒÊÇ·ñ´óÓÚ400
        fprintf(1, '%.9f\n', y(i));
    end
end

(2)
CODE:
syms x y; %×¢ÒâÓõ½µÄ·ûºÅ¶¼ÒªÉùÃ÷Ò»ÏÂ
a=y+1;
b=y-1;

f=a*b+a+b*x+y+6*x+2;

%½â·½³Ìf=0
equation = [char(f) ' = 0'];
A=solve(equation, 'y');

%ÉÏÃæ½âµÃµÄ½á¹ûÊÇ
%A =
%  - x/2 - (x^2 - 16*x - 4)^(1/2)/2 - 1
%   (x^2 - 16*x - 4)^(1/2)/2 - x/2 - 1

%¶ÔÓÚ·ûºÅʽ×Ó£¬Ê¹ÓÃsubsº¯Êý´úÈëÊýÖµ

%×¢ÒâÉÏÃæµÄ·½³ÌÒòΪÓпª·½£¬ËùÒÔ²»Ò»¶¨Äܽâ³öʵÊý½â£¬ÕâÀïÖ±½Óȡһ¶ÎÓÐʵÊý½âµÄ
x = 20:80;
y1 = zeros(1, length(x)); %ϰ¹ßÉÏÑ­»·Ç°Ïȸø¶¨´æ´¢¿Õ¼ä
y2 = zeros(1, length(x));
for i=1:length(x)
    y1(i) = subs(A(1), x(i));
    y2(i) = subs(A(2), x(i));
end

plot(x, y1, 'b', x, y2, 'r');

2Â¥2011-10-12 10:12:19
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

sudo

ľ³æ (ÕýʽдÊÖ)

¡ï ¡ï
΢³¾¡¢ÃÎÏë(½ð±Ò+2): лл²ÎÓëÓ¦Öú~ 2011-10-12 20:42:05
ÆäʵµÚ¶þ¸öÎÊÌâÀïÃæ£¬Ëã³öAÖ®ºó£¬Ö±½Ó
CODE:
x = 20:80;
Y= subs(A, x);
plot(x, Y(1, :), 'b', x, Y(2, :), 'r');

¾Í¿ÉÒÔµÄ...

²»¹ýÕâôдµÄ»°¾õµÃÄã¿ÉÄܲ»ÈÝÒ×Àí½â
3Â¥2011-10-12 10:16:33
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

zhmdream

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by sudo at 2011-10-12 10:12:19:
Äã²»ÓÃÿ´Î¶¼·ÅÄÇô¶à·ÖÉÏÀ´µÄ...

(1)ʹÓÃisrealº¯ÊýºÍÑ­»·
[code]
for i=1:length(y)
    if isreal(y(i)) && y(i)>400 %ÅжÏy(i)ÊÇ·ñÊÇʵÊý£¬²¢ÇÒÊÇ·ñ´óÓÚ400
        fprintf(1, '%.9f ...

ºÇºÇ£¬Ð»Ð»°ïæ¡£ÎÊÌâ½â¾ö²î²»¶àÁË£¬µ«ÊÇ»¹ÓÐЩСÎÊÌ⣺

ÎÊÌ⣨2£©µÄ·½³Ìµ±Ê±ÊÇΪÁË·½±ã£¬Ëæ±ãÉèµÄ¡£ÎÒÒª½âµÄÊÇÒ»ÔªËĴη½³Ì£¬½âµÄ½á¹ûÓÐÁ½¸öʵ½âºÍÁ½¸öÐé½â¡£ÉáÈ¥Ðé½â£¬²¢Ö»ÓÐʵ½â>400£¬²ÅÊÇÎÒËùÒªÇóµÄ½â£¬²¢ÓÃÓÚ×÷ͼ¡£ÏÂÃæÎÒµÄÉè¼ÆÓë˼·£º

%%%֮ǰ³ÌÐòÊ¡ÂÔ
%Çó½âTg
A=solve(equation, 'Tg');   
Tp=450:1:453;     %±äÁ¿Tpȡֵ£¬²¢½«Tp´úÈ룬Çó³öTg
for i=1:length(Tp)
    Tg1(i) = subs(A(1), Tp(i));
    Tg2(i) = subs(A(2), Tp(i));
    Tg3(i) = subs(A(3), Tp(i));
    Tg4(i) = subs(A(4), Tp(i));
end
%µÃµ½Á½Êµ½âÓëÁ½Ðé½â

%ÏÖÔÚ¶ÔÕâÁ½Êµ½âÓëÁ½Ðé½â£¬½øÐбȽϡ£´óÓÚ400µÄʵÊý½â²ÅÊÇÎÒ×îÖÕÏëÒªµÄ
for i=1:4
     j=1:length(Tg)
    if isreal(Tg(i)(j)) && Tg(i)(j)>400 %ÅжÏTg(i)ÊÇ·ñÊÇʵÊý£¬²¢ÇÒÊÇ·ñ´óÓÚ400
        fprintf(1, '%.9f\n', Tg(i)(j));
    end
end

plot(Tp, Tg) %¶ÔTpÓëTg×÷ͼ

ÎÒÔËÐÐʱ£¬µ½Á˵Ú2²¿·Ö¾Í³ö´í¡£Ð»Ð»£¡
ÈËÉúÈçÃΣ¬ËêÔÂÎÞÇé~~~
4Â¥2011-10-13 20:23:16
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[»ù½ðÉêÇë] ½ñÌìÎñί»á¿ªÍêÁË£¬Ã÷Ìì³ö½á¹ûÂð +17 angus9576 2026-08-25 21/1050 2026-08-25 22:39 by ÓÆÓÆÃÀÅ®
[»ù½ðÉêÇë] 2026Äê8ÔÂ25ÈÕ¹ú×ÔÈ»·Å°ñǰͻȻÊÕµ½ÁÐÈëÆÀÉóר¼ÒÓʼþ£¬ÓйØÏµÂ𣿠+12 ľˮ˼¶¹ 2026-08-25 14/700 2026-08-25 22:35 by yys300
[»ù½ðÉêÇë] ÔÚ¼á±ù»¹¸Ç×ű±º£µÄʱºò£¬ÎÒ¿´µ½ÁËÅ­·ÅµÄ÷»¨¡£ (½ð±Ò+10) +6 ziyangfang 2026-08-25 9/450 2026-08-25 20:26 by huagongfeihu
[»ù½ðÉêÇë] ÓÐûÓдóÉñ°ïÎÒ¿´¿´»ù½ð´úÂë 28+4 1234567wang 2026-08-24 10/500 2026-08-25 19:15 by lfy8008
[»ù½ðÉêÇë] ·Å°ñǰµÄ²»µ­¶¨ 20+4 snowwithsea 2026-08-19 19/950 2026-08-25 17:57 by chick875
[»ù½ðÉêÇë] ijЩ»ú¹¹£¬ÒÔЧÂʵÍΪÈÙ£¬ÒÔЧÂʵÍ×÷Ϊ´æÔڸР+9 yuleib84 2026-08-25 10/500 2026-08-25 17:14 by alexon
[»ù½ðÉêÇë] ½ñÈÕ²»·Å°ñ£¿Íø´«¹ú×ÔȻԤ¼Æ 8 Ô 27 Èտɲé½á¹û +17 ҽѧÀÏÄк¢ 2026-08-20 22/1100 2026-08-25 15:36 by ҽѧÀÏÄк¢
[»ù½ðÉêÇë] Èç¹û´Ë¿ÌÄãÕýÔÚΪ¹ú»ù¸Ðµ½½¹ÂÇ£¬²»·ÁÀ´ÌýÌýÕâÊס¶»ù½ðÖ®Íâ¡· +8 scalable 2026-08-24 8/400 2026-08-25 12:52 by jnhyjjm
[»ù½ðÉêÇë] ûÓÐÈκÎÏûÏ¢-ÊDz»ÊǾÍÁ¹ÁË +9 ͼÀ²Í¼À² 2026-08-24 10/500 2026-08-25 11:59 by ÄϺ£Ð¡¸ç
[»ù½ðÉêÇë] ÈËÆø²»ÐÐÁË +11 fansofjerry 2026-08-21 11/550 2026-08-25 11:04 by ¹Â¶ÀµÄÓ¢ÐÛ6
[½Ìʦ֮¼Ò] µ¼Ê¦Í²ۣºÎÒÔõô̯ÉÏÁËÕâô¸ö¼«Æ·Ñо¿Éú£¡ +3 ËÕ¶«ÆÂ¶þÊÀ 2026-08-23 3/150 2026-08-25 10:35 by shisan1313
[»ù½ðÉêÇë] 2026ÄêµÄ¹ú¼ÒÉç¿Æ»ù½ðÏîĿͨѶÆÀÉóµÄйæÔòÓëж¯Ïò¡¢ÐÂÌôÕ½ +5 process2012 2026-08-23 7/350 2026-08-25 09:42 by huixian257
[»ù½ðÉêÇë] ½ñÌì»ù½ð»á³ö½á¹ûÂð£¿20260819 +17 kkkl_v 2026-08-19 18/900 2026-08-25 09:41 by windflowerwy
[»ù½ðÉêÇë] filecode£¬4¸öjtjcÁË +14 ziyangfang 2026-08-19 17/850 2026-08-24 18:37 by ¹þ¹þ¸ò£¿
[»ù½ðÉêÇë] ¿ÆÑй¶ùÌ«ÄÑÁË +18 ÎÒ4´ó°×²Ë 2026-08-20 19/950 2026-08-24 09:47 by ¿­¶÷¹ãÊ¢´ß»¯·ÖÎ
[½Ìʦ֮¼Ò] Ìø²ÛºóÔÚÑÐÏîÄ¿Ôõô°ì£¿ +5 ¼òµ¥»¯xn 2026-08-22 10/500 2026-08-23 12:38 by ¼òµ¥»¯xn
[»ù½ðÉêÇë] ʱ¼ä´Á½ñÌ죬20ºÅ±äÁË +5 archvillain 2026-08-20 5/250 2026-08-22 06:12 by hui_daxiao
[»ù½ðÉêÇë] ¿´À´½ñÌì²»»á·Å°ñÁË£¿ +8 chengyan1220 2026-08-21 11/550 2026-08-21 17:52 by dcqxinyang
[»ù½ðÉêÇë] Ó¦¸ÃÊÇÏÂÖÜÈý26ÈÕ¹«²¼Á˰ɣ¿ +4 ¹þ¹þ¸ò£¿ 2026-08-21 4/200 2026-08-21 10:58 by Vivilian
[»ù½ðÉêÇë] ½ñÌì·Å°ñûϷÁ衃 +9 yuleib84 2026-08-19 11/550 2026-08-21 10:06 by gltch
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û