应《网络安全法》要求，自2017年10月1日起，未进行实名认证将不得使用互联网跟帖服务。为保障您的帐号能够正常使用，请尽快对帐号进行手机号验证，感谢您的理解与支持！

24小时热门版块排行榜    

小木虫论坛-学术科研互动平台 » 计算模拟区 » 计算模拟 » MATLAB新手求解方程
91/1返回列表
查看: 1592  |  回复: 8
只看楼主 @他人 存档 新回复提醒 (忽略) 收藏    在APP中查看

zhqh2000

新虫 (初入文坛)

[求助] MATLAB新手求解方程

方程为
0.84*h^0.96*(1-h)^0.28*[0.96/h-0.28/(1-h)]=0.58
求解h
帮帮忙，多谢啦
回复此楼

» 猜你喜欢

» 本主题相关价值贴推荐，对您同样有帮助:
1楼 2012-09-28 17:45:32
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

lghlgh2006

银虫 (初入文坛)

【答案】应助回帖

感谢参与，应助指数 +1
>> solve('0.84*h^0.96*(1-h)^0.28*[0.96/h-0.28/(1-h)]-0.58')
ans =

                                          0.40438914678629249107423901766733

//其他复数解不需要的话
赞一下 回复此楼
2楼2012-09-28 18:54:04
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhqh2000

新虫 (初入文坛)
引用回帖:
2楼: Originally posted by lghlgh2006 at 2012-09-28 18:54:04
>> solve('0.84*h^0.96*(1-h)^0.28*-0.58')
ans =

                                          0.40438914678629249107423901766733

//其他复数解不需要的话

奇怪了，我也是这么写的，可是MATLAB老是提醒我ERROR,怎么回事？
赞一下 回复此楼
3楼2012-09-28 20:10:05
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

dbb627

荣誉版主 (著名写手)

【答案】应助回帖

感谢参与，应助指数 +1
引用回帖:
3楼: Originally posted by zhqh2000 at 2012-09-28 20:10:05
奇怪了，我也是这么写的，可是MATLAB老是提醒我ERROR,怎么回事？...

出错提示信息是什么？
赞一下 回复此楼
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
4楼2012-09-28 20:52:46
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhqh2000

新虫 (初入文坛)
引用回帖:
4楼: Originally posted by dbb627 at 2012-09-28 20:52:46
出错提示信息是什么？...

Error using ==> solve at 162
Unable to find closed form solution.
赞一下 回复此楼
5楼2012-09-29 08:58:51
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

dbb627

荣誉版主 (著名写手)

【答案】应助回帖

★ ★
csgt0: 金币+2, 多谢应助 2012-10-25 09:45:49
你用的是什么版本的 我的matlab2010b没有问题

solve('0.84*h^0.96*(1-h)^0.28*(0.96/h-0.28/(1-h))-0.58')

ans =

                                          0.40438914678629249107423901766733
   0.28242508743785675212378783600029*i + 0.68485983116645460481483237103467
  0.025261350451946424196232116787958*i + 0.88804064649824549462952858529713
  0.88242678564717099262620693617147 - 0.086912324609154520445777531267815*i
     0.837722933370675359758547838529 - 0.19715352779809435610761564431393*i
  0.086912324609154520445777531267815*i + 0.88242678564717099262620693617147
0.88840275568841653641010680329821 - 0.0083026515809469118791064689033959*i
   0.15158966349478430780597149595942*i + 0.86393917623804668124201173756784
   0.55360389793940331487078170455609 - 0.25686038893774939924867955009193*i
  0.043334766707807347711263310705364*i + 0.88719299728611080414236295169951
  0.063460723299533291511882386883474*i + 0.88554815317436561609737102311783
    0.1512346729831002405177042820611*i + 0.44388752771653864759936089827795
    0.44388752771653864759936089827795 - 0.1512346729831002405177042820611*i
0.0083026515809469118791064689033959*i + 0.88840275568841653641010680329821
   0.68485983116645460481483237103467 - 0.28242508743785675212378783600029*i
   0.25686038893774939924867955009193*i + 0.55360389793940331487078170455609
   0.78325856333937625662743118225575 - 0.24829081687892619187566413267287*i
   0.24829081687892619187566413267287*i + 0.78325856333937625662743118225575
  0.88719299728611080414236295169951 - 0.043334766707807347711263310705364*i
  0.88554815317436561609737102311783 - 0.063460723299533291511882386883474*i
   0.87634151338075912306369329807059 - 0.11549178773547345671593076836971*i
   0.86393917623804668124201173756784 - 0.15158966349478430780597149595942*i
   0.11549178773547345671593076836971*i + 0.87634151338075912306369329807059
  0.88804064649824549462952858529713 - 0.025261350451946424196232116787958*i
     0.19715352779809435610761564431393*i + 0.837722933370675359758547838529
赞一下 回复此楼
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
6楼2012-09-29 09:03:47
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhqh2000

新虫 (初入文坛)
引用回帖:
6楼: Originally posted by dbb627 at 2012-09-29 09:03:47
你用的是什么版本的 我的matlab2010b没有问题

solve('0.84*h^0.96*(1-h)^0.28*(0.96/h-0.28/(1-h))-0.58')

ans =

                                          0.40438914678629249107423901766733
    ...

我是2007b版本了，试过n遍了，还不行啊，这才来求助的
赞一下 回复此楼
7楼2012-09-29 09:06:54
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

dbb627

荣誉版主 (著名写手)

【答案】应助回帖

我了解了，2007b用的是maple符号计算引擎，之后的matlab用的mupab引擎，他们的结果不一样正常。你换个高版本算下就没问题了
solve('0.84*h^0.96*(1-h)^0.28*[0.96/h-0.28/(1-h)]-0.58')

ans =

                                                 0.40438914678629249107423901766733
   0.28242508743785675212378783600029*sqrt(-1) + 0.68485983116645460481483237103467
  0.025261350451946424196232116787958*sqrt(-1) + 0.88804064649824549462952858529713
  0.88242678564717099262620693617147 - 0.086912324609154520445777531267815*sqrt(-1)
     0.837722933370675359758547838529 - 0.19715352779809435610761564431393*sqrt(-1)
  0.086912324609154520445777531267815*sqrt(-1) + 0.88242678564717099262620693617147
0.88840275568841653641010680329821 - 0.0083026515809469118791064689033959*sqrt(-1)
   0.15158966349478430780597149595942*sqrt(-1) + 0.86393917623804668124201173756784
   0.55360389793940331487078170455609 - 0.25686038893774939924867955009193*sqrt(-1)
  0.043334766707807347711263310705364*sqrt(-1) + 0.88719299728611080414236295169951
  0.063460723299533291511882386883474*sqrt(-1) + 0.88554815317436561609737102311783
    0.1512346729831002405177042820611*sqrt(-1) + 0.44388752771653864759936089827795
    0.44388752771653864759936089827795 - 0.1512346729831002405177042820611*sqrt(-1)
0.0083026515809469118791064689033959*sqrt(-1) + 0.88840275568841653641010680329821
   0.68485983116645460481483237103467 - 0.28242508743785675212378783600029*sqrt(-1)
   0.25686038893774939924867955009193*sqrt(-1) + 0.55360389793940331487078170455609
   0.78325856333937625662743118225575 - 0.24829081687892619187566413267287*sqrt(-1)
   0.24829081687892619187566413267287*sqrt(-1) + 0.78325856333937625662743118225575
  0.88719299728611080414236295169951 - 0.043334766707807347711263310705364*sqrt(-1)
  0.88554815317436561609737102311783 - 0.063460723299533291511882386883474*sqrt(-1)
   0.87634151338075912306369329807059 - 0.11549178773547345671593076836971*sqrt(-1)
   0.86393917623804668124201173756784 - 0.15158966349478430780597149595942*sqrt(-1)
   0.11549178773547345671593076836971*sqrt(-1) + 0.87634151338075912306369329807059
  0.88804064649824549462952858529713 - 0.025261350451946424196232116787958*sqrt(-1)
     0.19715352779809435610761564431393*sqrt(-1) + 0.837722933370675359758547838529

>> h=ans.1;
>> h=ans(1);
>> 0.84*h^0.96*(1-h)^0.28*[0.96/h-0.28/(1-h)]-0.58

ans =

1.8367099231598242312011508394098*10^(-40)
赞一下 回复此楼
The more you learn, the more you know, the more you know, and the more you forget. The more you forget, the less you know. So why bother to learn.
8楼2012-09-29 09:20:48
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhqh2000

新虫 (初入文坛)
高手啊，换了个2010b的，果然算出来了，太感谢您啦
赞一下 回复此楼
9楼2012-09-30 09:38:07
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 zhqh2000 的主题更新
91/1返回列表
普通表情 龙 兔 虎 猫
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[找工作] 售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急 +3 s3fFTmArrBt6 2026-09-14 4/200 2026-09-14 17:48 by Aj1rhIDL5ixY
[考博] 售SCI一区文章，我:8O5.5.1.O5.4,科目全,可伽急 +4 s3fFTmArrBt6 2026-09-14 4/200 2026-09-14 17:25 by Aj1rhIDL5ixY
[公派出国] 售SCI-T0P文章，我:8O.5.5.1.O.54,科目齐全,可+急 +3 LwdutQ8HoqWP 2026-09-13 5/250 2026-09-14 16:25 by Aj1rhIDL5ixY
[教师之家] 售SCI一区文章，我:8.O.55.1.O.54,科目齐全,可伽急 +3 LwdutQ8HoqWP 2026-09-13 4/200 2026-09-14 16:13 by Aj1rhIDL5ixY
[考研] 售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急 +4 LwdutQ8HoqWP 2026-09-13 4/200 2026-09-14 16:12 by Aj1rhIDL5ixY
[找工作] 售SCI一区文章，我:8O5.5.1.O5.4,科目全,可伽急 +4 3n8v2C8RimXI 2026-09-13 4/200 2026-09-14 16:00 by Aj1rhIDL5ixY
[博后之家] 售SCI一区T0P文章，我:8.O55.1.O.54,科目全,可十急 +4 3n8v2C8RimXI 2026-09-13 4/200 2026-09-14 15:57 by Aj1rhIDL5ixY
[教师之家] 售SCI一区T0P文章，我:8.O.55.1.O.54,科目齐全,可+急 +4 3n8v2C8RimXI 2026-09-13 4/200 2026-09-14 15:48 by Aj1rhIDL5ixY
[考研] 售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急 +3 3n8v2C8RimXI 2026-09-13 4/200 2026-09-14 15:45 by Aj1rhIDL5ixY
[找工作] 售SCI一区T0P文章，我:8.O.55.1.O.5.4,科目全,可+急 +5 QUjhNVAcOSff 2026-09-13 6/300 2026-09-14 15:21 by Aj1rhIDL5ixY
[硕博家园] 售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急 +3 QUjhNVAcOSff 2026-09-13 3/150 2026-09-14 15:09 by Aj1rhIDL5ixY
[博后之家] 售SCI一区T0P文章，我:8O.55.1.O.54,科目全,可伽急 +3 QUjhNVAcOSff 2026-09-13 4/200 2026-09-14 15:01 by Aj1rhIDL5ixY
[公派出国] 售SCI一区T0P文章，我:8.O55.1.O.54,科目全,可十急 +4 QUjhNVAcOSff 2026-09-13 6/300 2026-09-14 15:00 by Aj1rhIDL5ixY
[考研] 售SCI一区文章，我:8.O.551.O.5.4,科目全,可伽急 +3 QUjhNVAcOSff 2026-09-13 3/150 2026-09-14 14:57 by Aj1rhIDL5ixY
[找工作] 浙江师范大学是怎么坑我的 +6 recruit123 2026-09-09 6/300 2026-09-14 12:00 by 萨仁其其格
[博后之家] 售SCI一区T0P文章，我:8.O.55.1.O.5.4,科目全,可+急 +3 QUjhNVAcOSff 2026-09-13 3/150 2026-09-14 10:11 by 23jxep3nCNZb
[考研] 售SCI一区文章，我:8.O.551.O.5.4,科目全,可伽急 +3 QUjhNVAcOSff 2026-09-13 4/200 2026-09-14 10:01 by 23jxep3nCNZb
[考博] 西北工业大学材料学院电化学传感与催化课题组招收2027年推免研究生、博士生、博士后 +3 马方园 2026-09-10 4/200 2026-09-14 09:29 by Chem张zz
[考博] 27秋季材料博士申请求助 10+3 Cahal1 2026-09-11 4/200 2026-09-14 08:50 by 北京莱茵编辑
[基金申请] 面上有专家说实验设备不是我们单位的 +6 zj_muchong 2026-09-08 8/400 2026-09-11 06:56 by suifengdao
信息提示
关闭
请填处理意见
关闭