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posts - 419, comments - 576, trackbacks - 0, articles - 0

09 2018 档案

     摘要: 整个Qt在Windows中都可以通过批处理来编译,当编译好Qt后,会生成qmake.exe。 在没有安装Qt-VS-Addin的情况下,如何使用别人提供的Qt *.pro项目文件呢? 使用qmake可以直接生成Visual Studio项目文件  阅读全文

posted @ 2018-09-30 13:49 eryar 阅读(584) | 评论 (0)  编辑 |

     摘要: Gauss-Newton算法是一个古?#31995;?#22788;理非线性最小二乘问题的方法。该方法在迭代过程中要求矩阵J(x)满秩。为了克服这个困难,Levenberg(1944)提出了一种新的方法,但未受到重视。后来Marquardt(1963)?#31181;?#26032;提出,并在理论上进行了控讨,得到Levenberg-Marquardt方法,简称LM方法。在此基础上,Fletcher(1971)对其实现策略进行了改进,得到了Levenberg-Marquardt-Fletcher方法(LMF)。再后来,More(1978)将LM方法与信赖域方法结合,建立了带信赖域的LM方法。   LM算法的产生主要是解决曲线最小二乘拟合问题,现在很多软件使用LM算法来解决通用的曲线拟合问题。 本文主要介绍GPL开源库levmar2.6使用Visual Studio在Windows上进行编译。  阅读全文

posted @ 2018-09-26 20:53 eryar 阅读(1458) | 评论 (0)  编辑 |

     摘要: IsoAlgo3d三维管道软件主要用于将目前国际主流管道设计软件AVEVA PDMS和Intergraph SmartPlatn3D等软件导出的IDF/PCF文件进行三维模型重建,并在此基础上定制开发管道材料统计、管子零件设计、管子零件图功能。   在导入IDF/PCF后,可在三维模?#25237;?#28938;点信息进行编辑,即重新生成管子零件,方便管道预制?#23548;?#36827;行管子零件处理。即拿到设计院的IDF/PCF后,可以直接在IsoAlgo3d中进行三维浏览,与在管道设计软件中显示一样的三维模型。不需要再拿着轴测图来描图等麻烦的手工画图,提高效率。  阅读全文

posted @ 2018-09-15 22:44 eryar 阅读(985) | 评论 (0)  编辑 |

     摘要: 当前国际主流管道设计软件都可以生成IDF/PCF文件,这两种文件格式都是用于Isogen生成管道轴测图。其中IDF为ISOGEN Data File,主要来自Intergraph PDS 和AVEVA PDMS。PCF为Piping Component File,主要来自Intergraph SmartPlant 3D和CADWorx。 IsoAlgo3d可以对IDF/PCF进行三维浏览。  阅读全文

posted @ 2018-09-11 22:17 eryar 阅读(528) | 评论 (0)  编辑 |

     摘要: 在科学技术领域里常常提出求解非线性方程组的问题,例如,用非线性函数拟合实验数据问题、非线性网络问题、几何?#31995;?#26354;线曲面求交问题等。OpenCASCADE中有关于非线性方程组定义的类及其求解类,本文主要介绍如何在OpenCASCADE中定义非线性方程组,及对其进行求解。  阅读全文

posted @ 2018-09-06 21:20 eryar 阅读(686) | 评论 (0)  编辑 |

     摘要: RvmTranslator6.4版本发布,修改了部分模?#25237;?#22833;的问题。  阅读全文

posted @ 2018-09-05 22:57 eryar 阅读(512) | 评论 (0)  编辑 |

     摘要: Intel TBB并行计算库更改许可为Apache V2.0,使用更加自由。 不过TBB 2017版本之前的版本还是GPL许可,之后版本才是Apache V2.0许可。所以如果想在基于opencascade开发的软件中使用TBB而不用开源自己的代码的话,可以使用TBB 2017之后的版本。  阅读全文

posted @ 2018-09-04 09:25 eryar 阅读(603) | 评论 (0)  编辑 |

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快三3稳赚技巧钱绝招
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