小型水库除险加固工程溢洪道设计研究

在广西上思县念伦水库溢洪道除险加固设计中，对原破损的溢流面进行凿毛，另铺一层混凝土作底板，让新老混凝土用锚筋连接，联合受力，同时在原溢流面上凿槽铺设纵横塑料透水盲管，以降低底板扬压力。设计较大程度地降低了工程造价，满足了溢洪道的泄洪功能要求，实践证明是行之有效的。     

What the hack? A growth hacking taxonomy and practical applications for firms

As companies become increasingly digital, growth hacking emerged as a new way of scaling businesses. While the term is fashionable in business, many executives remain confused about the concept. Even if firms have an idea of what growth hacking is, they may still be puzzled as to how to do it, creating a strategy-execution gap. Our article assists firms by bridging the growth hacking strategy-execution gap. First, we provide a growth hacking framework and deconstruct its building blocks: marketing, data analysis, coding, and the lean startup philosophy. We then present a taxonomy of 34 growth hacking patterns along the customer lifecycle of acquisition, activation, revenue, retention, and referral; categorize them on the two dimensions of resource intensity and time lag; and provide an example of how to apply the taxonomy in the case of a fitness application. Finally, we discuss seven opportunities and challenges of growth hacking that firms should keep in mind.