• DQL (Data Query Language)

• Key Terminology For IAM
• What is S3 ?
• How does data consistency work for S3 ?
• S3 - Guarantees / Features / Storage Classes / Charges / Pricing Tiers / Security & Encryption / Version Control / Object Lock / Glacier Vault Lock / Performance / Select & Glacier Select
• Exam Tips & REMEMBER TO READ FAQ

Content Outline

• Some people prefer to buy technological devices as soon as they are available to the public, while other people prefer to wait.

• Schools always collect information about teachers’ teaching performance and give rewards to those teachers who perform well.

• etc

TPO TASK 2 - 4

TASK 2

【TPO 1】A student thinks that the university shouldn’t require this sculpture

• While, a student thinks that the university shouldn’t require this sculpture,
  • umm, this is because, you know, the university is in no financial position of doing so,
  • and also, the sculpture is actually quite large, so it will take up all the green space.
• However, the women didn’t like this idea,
  • this is because, umm, actually, the university didn’t pay for the sculpture , there is a donor donating this to the university.
  • also she know why this students didn’t like this sculpture**, this is because, you know,** he can’t play soccer in that green area anymore, and for him, he doesn’t want to move.
• So, these are the reason why the women does not like the idea.

• Should people be allowed to take photos when visiting a museum?
• Do you agree or disagree with the following statement? Being polite is more important than being truthful.
• etc

• Some people believe that television has had a positive influence on society. Others believe it has had a negative influence on society.

• Some college students choose to take courses in a variety of subject areas in order to get a broad education. Others choose to focus on a single subject area in order to have a deeper understanding of that area.

• etc

The study notes during the internship period of AWS, including AWS Global Infrastructure, Networking in AWS, Storage in AWS, Compute in AWS and Database in AWS, to name a few.

Abstract

• A hierarchical co-clustering module by using non-negative matrix tri-factorization for allocating attractions and things of interest to topic when splitting a coarse topic into fine-grained ones.
• A concept extraction module for extracting concept of every topic that maintain strong discriminative power at different levels of the taxonomy.

理论数学表达

Non-negative Matrix Factorization

The model is to approximate the input attraction-ToI matrix with three factor matrices that assign cluster labels to tourist attractions and Things of Interest (ToI) simultaneously by solving the following optimization problem:
$$
\min {\mathbf{U}, \mathbf{H}, \mathbf{V} \geq 0} \mathcal{O}=\left|\mathbf{X}-\mathbf{U H V}^{T}\right|{F}^{2} \
\mathbf{U}^{T} \mathbf{U}=\mathbf{I}, \quad \mathbf{V}^{T} \mathbf{V}=\mathbf{I}
$$
where $X $ is the input attraction-word content matrix, and $U ∈ R^{m×c}{+}$ and $V ∈ R^{n×c}{+}$ are orthogonal nonnegative matrices indicating low-dimensional representations of attractions and things of interest, respectively. The orthogonal and nonnegative conditions of the two matrices $U$ and $V$ enforce the model to provide a hard assignment of cluster label for attractions and things of interest. $H ∈ R^{c×c}_{+}$ provides a condensed view of $X$ .

对于证券公司等机构投资者而言，如何完善一个完整的套期保值流程和套保策略是提高证券投资收益和规避风险的一个重要环节。股指期货相对于股票现货最重要的两个功能就是杠杆和做空。运用杠杆能够提高资金的使用效率，利用做空能够实现套期保值。