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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ste包实现了推荐算法引擎，它提供了一套完整的推荐算法工具集，同时规范了数据结构，并标准化了程序开发过程。应用推...前言
Mahout框架中cf.taste包实现了推荐算法引擎，它提供了一套完整的推荐算法工具集，同时规范了数...
Failed loading english.pickle with nltk.data.load
...s Scarlett watered Professor Plum's green plant while he was away from his office last week."
]
sentences_tokenized = []
for s in sentences:
sentences_tokenized.append(word_tokenize(s))
sentences_tokenized is a list of a list of tokens:
[['Mr.', 'Green', 'killed', 'Colonel', 'Mustard', 'in',...
How to get current time in milliseconds in PHP?
...w.
If fact 2^63 - 1 (biggest signed integer) divided by 10^6 * 3600 * 24 * 365 (approximately the microseconds in one year) gives 292471.
That's the same value you get with
echo (int)( PHP_INT_MAX / ( 1000000 * 3600 * 24 * 365 ) );
In other words, a signed 64 bits integer have room to store a times...
Do unix timestamps change across timezones?
... earth, right? When the earth's core is back in the same location it was ~365 days ago, it has been a year. It isn't measured that way. It is measured by a specific location on the earth getting back to the same location (relative to the sun) that it was ~365 days ago. But the period of a day an...
Xcode: What is a target and scheme in plain language?
...oject.
For example, my project has two targets, a "normal" build and an "office" build that has extra testing features and may contain several background music tracks and a button to change the track (as it currently does).
You'll be used to adding classes and resources to your default target as y...
LR性能指标解释 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...吞吐率。
5.应用： jvm内存、日志、Full GC频率。
6.监控工具（LoadRunner[/url]）：用户执行情况、场景状态、事务响应时间、TPS等。
7.测试机资源：CPU、Memory、网络、磁盘空间。
监控工具
性能测试通常采用下列工具进行监控：
...
When should the xlsm or xlsb formats be used?
...were binary in format. .xlsb files retain this binary format for the newer office versions. There is both a size difference and a speed benefit to storing the data in binary format, though the improvements will only be noted in VERY large files.
– music2myear
J...
项目管理实践教程二、源代码控制【Source Control Using VisualSVN Server ...
...看了一些的文章而已，对它也不了解。
3.VisualSVN Server是免费的吗？
回答:
是的，VisualSVN Server是免费的，而VisualSVN是收费的。VisualSVN是SVN的客户端，和Visual Studio集成在一起， VisualSvn Server是SVN的服务器端，包括Subversion、Apache和...
Error Code: 1005. Can't create table '…' (errno: 150)
...empl INT UNSIGNED NOT NULL AUTO_INCREMENT,
PRIMARY KEY(id)
);
CREATE TABLE offices(
id_office INT UNSIGNED NOT NULL AUTO_INCREMENT,
id_empl INT UNSIGNED NOT NULL,
PRIMARY KEY(id),
CONSTRAINT `constraint1` FOREIGN KEY (`id_empl`) REFERENCES `employees` (`id_empl`) ON DELETE CASCADE ON UPDATE CASCADE ...
“互联网卖菜”没那么简单 创业者不要盲目跟风 - 资讯 - 清泛网 - 专注C/C+...
...低价的肯定是小区门口的大字报、小广告，以及200份青菜免费送的模式更吸引大妈大爷群体，简单粗暴是主要的，什么满20减5块，扫码送的玩法通通行不通，最近瓜子二手车的魔性广告让人烦的记住了，对于大妈大爷群体，笔者...