Underwater optical guiding and communication solution for the AUV and seafloor node.

In this paper, an optical guiding and docking scheme is designed, and a node integrating laser positioning guidance and communication functions is developed. Through experiments, it is verified that the laser docking system has the function of guiding and communicating the autonomous underwater vehicle (AUV) with the support of the seabed observation network. It can provide two-dimensional position information for underwater platforms to navigate the media to sea network nodes and enable visual contact between them.

Fault Detection and Isolation Methods in Subsea Observation Networks.

Subsea observation networks have gradually become the main means of deep-sea exploration. The reliability of the observation network is greatly affected by the severe undersea conditions. This study mainly focuses on theoretical research and the experimental platform verification of high-impedance and open-circuit fault detection for an underwater observation network.

Study on the durability of concrete with FNS fine aggregate.

As a by-product of nickel production, the ferronickel slag (FNS) puts a lot of pressure on the environment. It is becoming more and more urgent to deal with the increasing FNS. The aim of this study is to explore the durability of concrete with FNS fine aggregate.

[Function of the hypothalamus-pituitary-adrenal axis in children with attention deficit hyperactivity disorder].

Objective: To study the function of the hypothalamus-pituitary-adrenal (HPA) axis in children with attention deficit hyperactivity disorder (ADHD).

Methods: One hundred and twenty-eight boys with ADHD at ages of 6 to 14 years were enrolled. The diagnosis and grouping of ADHD were based on the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV): ADHD-predominantly inattention type (ADHD-I, n=44), ADHD-predominantly hyperactive impulsivetype (ADHD-HI, n=32) and ADHD-combined type (ADHD-C, n=52).