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如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术

...Choosing-a-Machine-Learning-Classifier如何针对某个分类问题决定使用何种机器学习算法? 当然,如果你真心在乎准确率,最好的途径就是测试一大堆各式各样的算法(同时确保在每个算法上也测试不同的参数),最后选择在交叉验证中...
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App Inventor 2 TaifunImage 拓展,图像高级处理功能,剪裁,压缩,翻转等 ...

...分割成12块,参见截图 这些块也将存储在ASD中。 使用以下命名约定:imageFileName_rowNumber_columnNumber.jpg。 如果ASD中的图像是横向格式则返回true,否则返回false。 缩放ASD中的jpg图像文件。 参数scalingLogic接受F...
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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...视图日志 在数据库A上创建这个表的物化视图日志,我们使用的创建方法是最简洁的,如下: CREATE MATERIALIZED VIEW LOG ON T_MV_TEST; 这将在表T_MV_TEST上创建一个触发器和一个日志表MLOG$_T_MV_TEST。 它和CREATE MATERIALIZED VIEW LOG ON T_MV_TES...
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How do I copy a hash in Ruby?

...Marshal documentation, If you need to deserialize untrusted data, use JSON or another serialization format that is only able to load simple, ‘primitive’ types such as String, Array, Hash, etc. Here is an example on how to do cloning using JSON in Ruby: require "json" original = {"Jo...
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线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

...一个重要的特征,它只存于一个线程当中。当你在B线程使用A线程的窗口对象指针pWnd,B线程对此对象指针做AssertValid时,会因为以下几种原因导致断言失败: 1. CHandleMap* pMap = afxMapHWND(); ASSERT(pMap != NULL)失败;该线程没有映射...
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Best Practices for Laravel 4 Helpers and Basic Functions?

...aries' to the ClassLoader::addDirectories( array. Option 2: Edit composer.json to add "app/libraries" to the autoload array. Run composer dump-autoload Call your class and static functions from your views. About your options, quoted from the global.php file In addition to using Composer, you ...
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How to install latest (untagged) state of a repo using bower?

... how do you force the install of an older version in the package.json if you already have a newer one? – SuperUberDuper Mar 26 '15 at 12:26 add a comment ...
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How can I get a user's media from Instagram without authenticating as a user?

...html) { var regex = /_sharedData = ({.*);<\/script>/m, json = JSON.parse(regex.exec(html)[1]), edges = json.entry_data.ProfilePage[0].graphql.user.edge_owner_to_timeline_media.edges; $.each(edges, function(n, edge) { var node = edge.node; $...
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BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...次连接,重新生成一次Access address。数据包是给连接通信使用的,即用于master和slave之间通信的。广播类型目前BLE广播报文有7种类型,其中关于连接的报文有3种,关于广播方式的报文有4种,分别为可连接的非定向广播(ADV_IND)...
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how to convert array values from string to int?

...st 3 times faster than explode(), array_map() and intval(): $integerIDs = json_decode('[' . $string . ']', true); share | improve this answer | follow | ...