Loại polymer nào sau đây được điều chế bằng phản ứng trùng ngưng?     

Theo đồ thị ở hình dưới đây, vật chuyển động thẳng đều trong khoảng thời gian

Cho ba tập

\(A=\left[ -2;0 \right]\), \(B=\{x\in \mathbb{R}\,\text{ }\!\!|\!\!\text{ }\,-1<x<0\text{ }\!\!\}\!\!\text{ }\), \(C=\{x\in \mathbb{R}\,\text{ }\!\!|\!\!\text{ }\,\left| x \right|<2\text{ }\!\!\}\!\!\text{ }\).

Read the following passage about urban shift and mark the letter A, B, C, D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

[I] Sperm whales are fascinating creatures. [II] They possess the biggest brain of any species, six times larger than a human’s, which scientists believe may have evolved to support intelligent, rational behavior. [III] They’re also highly social and capable of making decisions as a group. [IV] But there’s also a lot we don’t know about them, including what they may be saying to one another when communicating with a system of short clicks, known as codas.

Now, new research published in Nature Communications today suggests that sperm whales’ communication is actually much more expressive and complicated than was previously thought. A team of researchers led by Pratyusha Sharma at MIT’s Computer Science and Artificial Intelligence Lab (CSAIL) working with Project CETI, a nonprofit focused on using AI to understand whales, used statistical models to analyze whale codas and managed to identify a structure to their language that’s similar to features of human language. Their findings represent a tool future researchers could use to decipher not just the structure but the actual meaning of whale sounds.

For the study, the researchers examined recordings of 8,719 codas from around 60 whales collected by the Dominica Sperm Whale Project between 2005 and 2018, using a mix of AI algorithms for pattern recognition and classification. The AI then turned the clicks within the coda data into a new kind of data visualization called an exchange plot, revealing that some codas featured extra clicks. These extra clicks, combined with variations in the duration of their calls, appeared in interactions between multiple whales, which they say suggests that codas can carry more information and possess a more complicated internal structure than we had previously believed.

The team’s next step is to build language models of whale calls and to examine how those calls relate to different behaviors. They also plan to work on a more universal system that could be used across species, says Sharma. Taking a communication system we know nothing about, working out how it encodes and transmits information, and slowly beginning to understand what’s being communicated could have many purposes beyond whales. “I think we’re just starting to understand some of these things,” she says. “We’re very much at the beginning, but we are slowly making our way through.”

According to paragraph 2, which of the following is NOT mentioned as a tool or method used by researchers to study whale communication?

Trong chân không, ánh sáng có bước sóng nhỏ nhất trong số các ánh sáng đơn sắc: đỏ, vàng, lam, tím là

Công nghệ nào sau đây được ứng dụng trong bảo quản sản phẩm trồng trọt?

Cho hàm số \(f(x)\) liên tục trên \(\mathbb{R}\) và có đồ thị như hình vẽ. Số nghiệm thực của phương trình \(|f(x)-1|=3\) bằng 

Cho hàm số \(y=f(x)\) có đồ thị như hình vẽ. Hỏi phương trình \(f[f(x)]=0\) có bao nhiêu nghiệm thực phân biệt?

Tim người có mấy ngăn?

Ý nào dưới đây nói là về thuế trực thu?

Nhà Thiên văn học nào sau đây đã chứng minh Mặt Trời chỉ là trung tâm của Thái dương hệ và tồn tại trong vũ trụ vô tận?