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*Issue migrated from trac ticket # 3055*
**component:** Algorithms | **priority:** medium | **keywords:** MOO, Hypervolume Contribution, indicator-based
#### 2020-02-06 13:10:07: @kfyang created the…
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**Is your feature request related to a problem? Please describe.**
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
**Describe the solution you'd like**…
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I see that in `SearchExecutor` a `DistributedProblem` is created:
```java
...
if (this.getExecutorService() != null) {
problem = new DistributedProblem((Problem) problem, this.getExecutorServic…
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【已解决】原文往下翻
geatpy官方文档演示并行优化时，是单目标，并且没有约束的，所以有些地方我理解错了。
[**官方文档**](https://github.com/geatpy-dev/geatpy/tree/master/demo/soea_demo/soea_demo6)
后来重新理解了一遍，发现并行的原理其实就是，先**把种群**（比如NIND=200，就是200个决策变量）**…
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涉及到的代码demo如下（均是文档中的代码）：
`# -*- coding: utf-8 -*-
"""MyProblem.py"""
import numpy as np
import geatpy as ea
class MyProblem(ea.Problem): # 继承Problem父类
def __init__(self):
name = 'BNH…
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Hi,
It looks like I am having significant issue with GLPK.
Long story short - I have a working model that works sufficiently well. I am now trying to run several climate scenarios to assess the cl…
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写了一个循环多次调用，但第二次的时候就会卡住了，终止之后出现如下情况：
File "/Users/bytedance/PycharmProjects/pythonProject/optimizeVar.py", line 46, in
[population, obj_trace, var_trace] = myAlgorithm.run(prophetPop) # 执行算法模板，插…
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**Reporter: jdoyon@nrcan.gc.ca**
**Date: 2003/09/10 - 16:08**
```
It looks like when using opt_flag=2, the legend rendering tests the status of
layers before the REQUIRES keyword is applied to a lay…
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We have a `Grid` tuning strategy but should add genetic algorithm style tuning `Genetic
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您好，
使用NSGA2时，由于约束条件较为严苛以及变量维度过高，同时种群数量设置较小（以保证时间开销）。
较难找到可行解，想知道这种情况算法内部是怎么处理的，以及我应该在哪里改良/定制，以提高种群没有可行解情况下的速度。