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一门语言没有ad hoc polymorphism，那应该怎么解决呢？

In this report, we investigated performance of the omnibus test using simulated data. The hierarchical procedure is a widely used approach for comparing multiple (more than two) groups.[1] The omnibus test is intended to preserve type I errors by eliminating unnecessary post-hoc analyses under the null of no group difference. However, our simulation study shows that the hierarchical approach is not guaranteed to work all the time. The omnibus and post-hoc tests are not always in agreement. As our goal of comparing multiple groups is to find groups that have different means, a significant omnibus test gives a false alarm, if none of the post-hoc tests are significant. But, most important, we may also miss opportunities to detect group differences, if we have a non-significant omnibus test, since some or all post-hoc tests may still be significant in this case.Although we focus on the classic ANOVA model in this report, the same considerations and conclusions also apply to more complex models for comparing multiple groups, such as longitudinal data models [2]. Since for most models, post-hoc tests with significant levels adjusted to account for multiple testing do not have exactly the same type I error as the omnibus test as in the case of ANOVA, it is more difficult to evaluate performance of the hierarchical procedure. For example, the Bonferroni correction is generally conservative.Given our findings, it seems important to always perform pairwise group comparisons, regardless of the significance status of the omnibus test and report findings based on such group comparisons.

I applaud the effort to simplify things for 2.0! The current syntax feels sprawling and ad hoc.

The term "ad hoc" in this context is not intended to be pejorative; it refers simply to the fact that this type of polymorphism is not a fundamental feature of the type system.

The most common signature for HOCs looks like this: // React Redux's `connect` const ConnectedComment = connect(commentSelector, commentActions)(CommentList); What?! If you break it apart, it’s easier to see what’s going on. // connect is a function that returns another function const enhance = connect(commentListSelector, commentListActions); // The returned function is a HOC, which returns a component that is connected // to the Redux store const ConnectedComment = enhance(CommentList); In other words, connect is a higher-order function that returns a higher-order component!

Multiple comparisons: It is not good practice to test for significant differences among pairs of group means unless the ANOVA suggests some such differences exist. Nevertheless, I admit it is tempting to take another look at the comparison of G1 with G3 (ignoring the existence of G2 and perhaps assuming normality), but then you should use a Welch t test to account for the differences in sample variances, and you should not make claims about the result unless the P-value is as low as .01 or .02. Looking at that difference more carefully might prompt a subsequent experiment.

GPU and CUDA

LSTM Networks

DỮ LIỆU

TS. Lê Hồng Phương

PGS.TS. Nguyễn Lê Minh

- TS. Phan Xuân Hiếu

Data science

data on driving, traffic, weather, accidents, vehicle messages, traffic signals and road characteristics

Nothing would have changed

Adding descriptive metadata to datasets helps makes the dataset more accessible by others and into the future. Respondents were asked to indicate all metadata standards they currently use to describe their data. More than half of the respondents (56%) reported that they did not use any metadata standard and about 22% of respondents indicated they used their own lab metadata standard. This could be interpreted that over 78% of survey respondents either use no metadata or a local home grown metadata approach.