Sports Training Teaching Device Based on Big Data and Cloud Computing.

With the advent of the era of big data (BD), people have higher requirements for information, knowledge, and technology. Taking the Internet as the carrier, the use of cloud computing technology for distance education has become a trend. Our country's physical training teaching has also begun to change from traditional mode to modern mode.

Efficient error-correcting pooling designs constructed from pseudo-symplectic spaces over a finite field.

In this article, we construct two classes of t × n, s(e)-disjunct matrix with subspaces in pseudo-symplectic space F(q)(²v +¹) of characteristic 2 and prove that the test efficiency t/n of these constructions are smaller than that of D'yachkov et al. (2005).

New algebraic constructions for pooling design in DNA library screening.

Pooling design is an important mathematical tool in DNA library screening. It has been showed that using pooling design, the number of tests in DNA library screening can be greatly reduced. In this paper, we present some new algebraic constructions for pooling design.

The allylation reactions of aromatic aldehydes and ketones with tin dichloride in water.

The allylation reactions of aromatic aldehydes and ketones were carried out in 31-86% yield using SnCl(2)-H(2)O system under ultrasound irradiation at r.t. for 5h.