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上班族健康漫画：漫画健康养生手册

Health & Medicine > 健身

Description : 上班族健康漫画：漫画健康养生手册很多简单，有用的保持健... open close

138

free

Yingming Lou

如何在Word文件背景下面加水印， PDF文件下面加水印

Computers & Programming > Applications

Description : 如何在Word文件背景下面加水印， PDF文件下面加水... open close

411

free

Yingming Lou

Say it right the first time

Professional Counseling > 人际关系

Description : Introduction xiSection I:Yo... open close

244

$ 0.01

Yingming Lou

跨越裂谷, Crossing the Chasm

商务服务 > Marketing & Advertising

Description : 第一章高科技Marketing的幻觉 ... open close

第一章高科技Marketing的幻觉

1998年通用、福特等汽车制造商相继推出电动汽车，电动汽车与普通汽车相比起来更安静和更环保，但是这也引出一个问题：谁来为电动汽车买单？

技术接受生命周期
你对上面问题的答案可以判断出你在“技术接受生命周期”（Technology Adoption Life Cycle）模型中的位置，顾名思义，这是一个衡量新技术接受程度的模型。如果你的回答是“永远也不会”，你就是个落伍者（laggard）；如果你的答案是“等到事实证明电动汽车确实可用，而且路上有很多配套的服务时”，你可能是一个早期主流（Early majority）；如果你说：“直到大多数人都改用电动汽车而且目前的汽油车不好用时”，你很可能属于晚期主流（Late majority）；相反如果你想第一个开上电动汽车，你可能是吃螃蟹者（innovator）或者是早期接受者（Early adopter）。
以上各种类型是根据用户的态度分类的，这一点对Marketing至关重要。在对以上这些分类进行详细描述之前，作者先介绍了两个基本概念。
“连续的创新”：用户无需改变使用习惯的创新。美白牙膏、奥迪A8、特丽珑、使用奔四的电脑都属于这一类，新产品有很多新功能，但是它无需改变你的使用习惯。
“非连续的创新”：用户需要改变使用习惯的创新。漱口水、电动汽车、数字电视、电脑预装了linux等与上面的连续创新的产品对应，他们或者完全改变了使用习惯（漱口水和电脑预装了linux），或者打破了产业的原有基础设施和价值链（电动汽车和数字电视）。
连续的创新和非连续的创新两者之间还有很多例子。比如带辫子的电车就处在汽油车和电动汽车之间。
不连续对客户造成的影响，意味着打破现有系统，可能带来突破或巨大收益，不连续对市场引导者造成的影响，意味着打破现有的价值链，威胁现有标准，创造新的财富。高科技有很多非连续的创新，需要一个模型来了解新技术的市场接受情况，
作者提出了新技术接受生命周期（见下图），这是一条钟形曲线，根据用户接受新技术的不同心理将用户分为以下五类。
吃螃蟹者（innovator）：喜欢使用新技术，感兴趣的是技术本身
早期接受者（Early adopter）：对新技术感兴趣并懂技术，但是他们的关注的是使用新技术能够达成的商业目的，为达到目的敢为天下先
早期主流用户（Early majority）：懂技术但更注重实用，在新技术被证明成熟之前报着谨慎的态度，
晚期主流用户（Late majority）：不太懂技术，希望购买事实上的标准和主流厂家
落伍者（laggard）：对新技术有偏见，不愿意使用

384

free

Yingming Lou

Deployment of a Large-scale Peer-to-Peer Social Network

Computers & Programming > Programming

Description : We present the design and a... open close

277

free

Yingming Lou

PEER TO PEER NETWORKS IN OECD COUNTRIES

Computers & Programming > Programming

Description : Peer-to-peer digital delive... open close

239

free

Yingming Lou

大国崛起的历史经验与中国的选择

Professional Counseling > 哲学咨询

Description : 历史就像是大国兴衰更替的链条，一环扣一环，有始无终，兴... open close

254

free

Yingming Lou

我在上海赶飞机出租司机给我上了一堂MBA课

Professional Counseling > 哲学咨询

Description : 我要从徐家汇赶去机场，于是匆匆结束了一个会议，在美罗大... open close

288

free

Yingming Lou

一个人事经理眼里中国人的九大劣根性

Professional Counseling > Relationship Issues

Description : 一个人事经理眼里中国人的九大劣根性多年的人事工作经历... open close

275

free

Yingming Lou

Introduction of Network address translation (NAT)

Computers & Programming > Programming

Description : In computer networking, net... open close

In computer networking, network address translation (NAT) is the process of modifying network address information in datagram packet headers while in transit across a traffic routing device for the purpose of remapping a given address space into another.

Most often today, NAT is used in conjunction with network masquerading (or IP masquerading) which is a technique that hides an entire address space, usually consisting of private network addresses (RFC 1918), behind a single IP address in another, often public address space. This mechanism is implemented in a routing device that uses stateful translation tables to map the "hidden" addresses into a single address and then rewrites the outgoing Internet Protocol (IP) packets on exit so that they appear to originate from the router. In the reverse communications path, responses are mapped back to the originating IP address using the rules ("state") stored in the translation tables. The translation table rules established in this fashion are flushed after a short period without new traffic refreshing their state.

As described, the method only allows transit traffic through the router when it is originating in the masqueraded network, since this establishes the translation tables. However, most NAT devices today allow the network administrator to configure translation tables entries for permanent use. This feature is often referred to as "static NAT" or port forwarding and allows traffic originating in the 'outside' network to reach designated hosts in the masqueraded network.

Because of the popularity of this technique, see below, the term NAT has become virtually synonymous with the method of IP masquerading.

Network address translation has serious consequences (see below, Drawbacks, Benefits) on the quality of Internet connectivity and requires careful attention to the details of its implementation. As a result, many methods have been devised to alleviate the issues encountered. See article on NAT traversal.

Overview
In the mid-1990's NAT became a popular tool for alleviating the IPv4 address shortage. NAT has proven particularly popular in countries that (for historical reasons) had fewer address space blocks allocated per capita.[citation needed] than, for example, the United States. It has become a standard, indispensable feature in routers for home and small-office Internet connections.

Most systems using NAT do so in order to enable multiple hosts on a private network to access the Internet using a single public IP address (see gateway). However, NAT breaks the originally envisioned model of IP end-to-end connectivity across the Internet and introduces complications in communication between hosts and has performance impacts.

NAT obscures an internal network's structure: all traffic appears to outside parties as if it originates from the gateway machine.

It has been argued that the wide adoption of IPv6 would make NAT unnecessary, as NAT is a method of handling the shortage of the IPv4 address space.[citation needed]

Network address translation involves re-writing the source and/or destination IP addresses and usually also the TCP/UDP port numbers of IP packets as they pass through the NAT. Checksums (both IP and TCP/UDP) must also be rewritten to take account of the changes.

Read more ...

259

free

Yingming Lou

如何对付考试，最有效地提高考试分数，免费服务！

学校教育 > 家教/作业辅导

Description : 本人考试从来不失败。绝大部分都是名列前茅。在本人的指导... open close

289

free

Yingming Lou

谁动了我的奶酪, who moved my cheese

Professional Counseling > 自我激励

Description : 《谁动了我的奶酪》，生动的阐述了“变是唯一的不变”这一... open close

255

free

Yingming Lou

中国汽油价格与美国汽油价格换算；中国汽车耗油量与美国汽车耗油量单位换算

商务服务 > Finance & Accounting

Description : 中国汽油价格与美国汽油价格换算；中国汽车耗油量与美... open close

593

free

Yingming Lou

物理课程辅导，中学，大学及研究生；如不满意，保证退款。

学校教育 > 其他

Description : 任何物理类的课程辅导，从中学，大学到研究生。本人物理方... open close

164

$ 4.39 /hour

Yingming Lou

Free English Speaking class

语言培训 > 其他

Description : Free English class open close

226

free

Yingming Lou

How to setup SPA3102 and FreePBX in Linux

Computers & Programming > Networking

Description : This article will tell your... open close

383

$ 0.73

Yingming Lou

Unix introduction PPT, FREE!

Computers & Programming > Operating Systems

Description : This PPT file introduces ab... open close

342

free

Yingming Lou

EDA software consultant/advice

Computers & Programming > Hardware

Description : Based on 10 years experienc... open close

206

free

Yingming Lou

How to improve your English in real pratical way!

语言培训 > 其他

Description : I'm willing to talk with an... open close

219

$ 1.46 /hour

Yingming Lou

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上班族健康漫画：漫画健康养生手册

最新版本Iphone3.1.2 （3G）破解和刷机，可以拿机子到清华科技园，10分钟完成

如何在Word文件背景下面加水印， PDF文件下面加水印

最新版本Iphone3.1 （3G）破解和刷机，可以拿机子到清华科技园，20分钟完成

Say it right the first time

跨越裂谷, Crossing the Chasm

Deployment of a Large-scale Peer-to-Peer Social Network

PEER TO PEER NETWORKS IN OECD COUNTRIES

大国崛起的历史经验与中国的选择

我在上海赶飞机出租司机给我上了一堂MBA课

一个人事经理眼里中国人的九大劣根性

Introduction of Network address translation (NAT)

如何对付考试，最有效地提高考试分数，免费服务！

谁动了我的奶酪, who moved my cheese

中国汽油价格与美国汽油价格换算；中国汽车耗油量与美国汽车耗油量单位换算

物理课程辅导，中学，大学及研究生；如不满意，保证退款。

Free English Speaking class

How to setup SPA3102 and FreePBX in Linux

Unix introduction PPT, FREE!

EDA software consultant/advice

How to improve your English in real pratical way!