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学习消费者理论小结：偏好关系是一种存在于消费集X的二项关系，它有以下公理（满足公理123则称满足偏好关系）
1.完备性（消费者能够比较、做出选择）；
2.反身性（至少与它本身一样好）；
3.传递性（消费者选择是一致的）；
4.连续性（闭集，包含极限）；
5.严格单调性（排除了无差异集斜率为正的线段）；
6.严格凸性（无差异曲线凸向原点）

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阅读2小时-O Done.  完成
Reading Material : Clayton M.Christensen article on HBR Dec.2015 what is disruptive innovation
Reflection: disruption describes a process whereby a smaller company with fewer resource is able to successfully challenge established incumbent business. Specifically as incumbents focus on improving their products and service for their most demanding and usually profitable customers, they exceed the needs of some segments and ignore the needs of others. The disruptive innovation model  the diagram contracts product performance trajectories ( the lines showing how the products or services improve over time) with customer demand trajectories (the lines showing customer’s willingness to pay for performance. As incumbent companies introduce higher quality products or services to satisfy the high end of the market where profitability is highest. They overshoot the needs of low-end customers and many mainstream customers. This leaves an opening for entrant to find footholds in the less profitable segments that incumbents neglecting. Entrants on a disruptive trajectory improve their performance of their offering and move upmarket and challenge the dominance of the incumbents.

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《思想的力量：哲学导论》
316. 伯兰特-罗素认为倘若缺乏适当的教育，人就会被构成常识的偏见所禁锢。他想创造的一种教育是：不光在哲学上站住脚，而且还不造成压力。这种教育是轻松愉快、令人振奋的。
他最为声名狼藉的一部书《婚姻与道德》（Marriage and Morals, 1929）书中对性行为的态度相当开放。
1950年获得诺贝尔文学奖。
自传中，罗素称，有三种激情贯穿了他的整个人生：对爱的渴望，对知识的追去，对人类苦难的深切悲悯。
罗素的一生展现了杰出的才智和非同寻常的个性与胆识。

317. 罗素不是逻辑主义（Logicalism）的唯一倡导者，比他早几年的，德国数学家哥特洛布-弗雷格（Gottlob Frege，1848-1925）设计了逻辑语言，罗素是继其之后第一位发现其重要性的人。
罗素和阿尔弗雷德-诺斯-怀特海（Alfred North Whitehead）合著的《数学原理》（Principia Mathematic，最后一卷出版于1913年）被英语国家认为是逻辑主义的巅峰之作，这是一部富有震撼力的智慧杰作。

318. 罗素在朋友摩尔的影响下，开始认为分析方法适用于整个哲学；其他哲学领域都和数学哲学领域一样，通过分析就能得出清晰明确、无可辩驳的结论。
1910年前后，罗素开始试图把其在数学领域尝试过的方法运用到认识论上：在我们对于永恒的物理世界的知识中，确认绝对基本的、不可定义的实体，确认最基本的、无法证明的命题。

维也纳小组（Vienna Circle），深受罗素、维特根斯坦著作的影响，把自己的哲学称为逻辑实证主义（Logical positivism），主张哲学不是一种理论，而是一种活动，其任务就是对思想进行逻辑上的澄清。
他们提出了“意义的可证实性原则（verifiability criterion of meaning）”。

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Blockchain：
    Processing a financial transaction
    ------------------------------------------
    Before we dig deeper into blockchain-based transactions, it is helpful to know about how financial transactions actually happen and the functioning of fiat money.
    Fiat money is entirely based on the credit of the economy; by definition, it is the money declared legal tender by the government. Fiat money is worthless without a guarantee from the government.
    Another type of money is commodity money; it is derived from the commodity out of which the good money is made. For example, if a silver coin is made, the value of the coin would be its value in terms of silver, rather than the defined value of the coin. Commodity money was a convenient form of trade in comparison to the barter system. However, it is prone to huge fluctuations in price.

    Commodity money proved to be difficult to carry around, so, instead, governments introduced printed currency, which could be redeemed from the government-based banks for actual commodity, but then, even that proved to be difficult for the government to manage, and it introduced  fiat-based currency, or faith-based currency.
    Having fiat-based currencies incurred a lot of third-party consensus during its time; this would help eradicate fraud from the system. It is also ne cessary to have a stringent consensus process to make sure that the process, as well as the privacy, is maintained within the system. The following diagram depicts the process of a credit card-based payment process.
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Django: debug program files.....
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    telemetry  [təˈlemətri]
    n.         遥测; 遥感勘测，自动测量记录传导; 测远术;
    [例句]Transmission quality of PCM telemetry system is related to both the transmitting and receiving equipment of the system.
    PCM遥测的传输质量与射频系统的发射和接收设备直接有关。

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昨日阅读2小时，累计阅读210小时。

A mistake.

我阅读很多材料，也花很多时间和很多人交谈。我觉得两个最有效的学习、获取信息的方法是阅读和同专家交谈。所以我会花很多时间做这两件事情。在我的kindle上有不到一千本书，我大概已经阅读了其中的2/3。

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