在云环境下,各种闲置资源可以通过池化形成资源池,进而利用虚拟化技术将资源池中的不同资源组合以服务的形式提供给用户使用,因此需要合理而有效的机制来分配资源。针对云环境下资源的特点,将经济学和智能方法相结合,提出了一种基于双向组合拍卖的智能资源分配机制。在该机制中,提出了基于体验质量(quality of experience,简称QoE)的威望系统,引入威望衰减系数和用户信誉度,降低拍卖中恶意行为造成的影响,为资源交易提供QoE支持。对拍卖中的竞价决策,综合考虑多种因素,提出了基于BP神经网络的竞标价格决策机制,不仅可以合理确定竞标价,而且使价格可以动态适应市场变化。最后,由于组合拍卖胜标确定问题是NP完全的,因此引入群搜索优化算法,以市场盈余和总体威望为优化目标,得到资源分配方案。仿真研究结果表明,该机制是可行和有效的。
You Don’t Know JS: this & Object Prototypes.pdf【前端技术】
?To perform effective penetration testing with Metasploit
?To develop advanced and sophisticated auxiliary modules
?To fuzz applications and create exploits in Metasploit
?To port sophisticated exploits from Perl and Python
?To automate web application attack scripts
?To test services such as databases, VoIP, and SCADA systems
?To reinvent traditional browser-based exploits
?To speed up penetration testing with Metasploit’s automated mode
?To attack clients with the Social Engineering Toolkit
?To implement attacks on web servers and systems with Armitage GUI
?To script attacks in Armitage using Cortana scripting
By taking you through the development of a real web application from beginning to end, this hands-on guide demonstrates the practical advantages of test-driven development (TDD) with Python. You’ll learn how to write and run tests before building each part of your app, and then develop the minimum amount of code required to pass those tests. The result? Clean code that works.
In the process, you’ll learn the basics of Django, Selenium, Git, jQuery, and Mock, along with current web development techniques. If you’re ready to take your Python skills to the next level, this book clearly demonstrates how TDD encourages simple designs and inspires confidence.