2月20日: 查看任务介绍,二分类问题,评价标准logloss 下载数据 2月21~27日: 查看数据组成,标识分类变量.离散变量.连续变量. 发现连续数据有大量非随机空缺(占总量一半),主要集中在v2相关与v8相关列 根据空缺相关性,可将feature分为6组: g1-v8相关列,g2-v2相关列,g3-与v2v8均不相关的稀疏列,g4-无缺值连续变量,gd-离散变量,gc-分类变量 标签样本不均衡,约75%的y==1,25%的y==0 查看相关性. 2月28日~3月3日: 考虑对缺值数据(f…

众所周知,递归编程是一项有争议的技术,因为它需要大量的内存,但是它能简化一些编程任务.基本上,一个递归操作都是程序调用自己传递参数修改的值或者参数传递到当前的程序循环中.递归编程通常用来计算阶乘斐波那契数列,回文,谢尔宾斯基地毯等问题.下面的代码演示了用递归实现的阶乘. /** * Calculate the factorial of n (n! = 1 * 2 * 3 * … * n). * * @param n the number to calculate the factorial of…

https://rubygarage.org/blog/machine-learning-in-fintech Machine learning (ML) has moved from the periphery to the very center of the technology boom. But which industry is best positioned - with the huge data sets and resources - to take advantage of…

from:http://blogs.msdn.com/b/security_trimming_in_sharepoint_2013/archive/2012/10/29/creating-custom-connector-sending-claims-to-sharepoint-2013.aspx What You Will Learn This blog entry describes how to take an existing custom XML connector to the Se…

原文地址:http://www.javacodegeeks.com/2015/07/mysql-vs-mongodb.html 1. Introduction It would be fair to say that as IT professionals we are living in the golden age of data management era. As our software systems become more complex and more distributed,…

Java Memory Management, with its built-in garbage collection, is one of the language’s finest achievements. It allows developers to create new objects without worrying explicitly about memory allocation and deallocation, because the garbage collector…

Cannot convert claims identity to a windows token.  This may be due to user not logging in using windows credentials. solusion: This service is enabled via Central Admin –> Application Management –> Service Applications –> Manage services on serv…

Methods, apparatus, and systems, including computer programs encoded on a computer storage medium, manage an address space. In some implementations, a method includes managing an allocation data structure for a memory, wherein the allocation data str…

An approach is provided in a hypervised computer system where a page table request is at an operating system running in the hypervised computer system. The operating system determines whether the page table request requires the hypervisor to process.…

A buffer management mechanism in a multi-core processor for use on a modem in a telecommunications network is described herein. The buffer management mechanism includes a buffer module that provides buffer management services for one or more Layer 2…