A valve-controlled hydraulic cylinder system has the characteristics of uncertainty and time-variance, electro-hydraulic servo unit encounters shock, vibration, other external interference when working, which seriously affect stability system. Therefore, it is necessary to introduce an active disturbance rejection controller (ADRC) into control. However, there are many ADRC parameters, difficul...

Aiming at the problems of modal aliasing and poor noise resistance when processing vibration acceleration signal rolling bearings by empirical decomposition (EMD), a variational (VMD) method based on parameter optimization is proposed. Combined with improved particle swarm algorithm (IPSO) envelope entropy, VMD layers penalty parameters were optimized. The components high correlation coefficien...

The aim of this study was to determine attitudes to malocclusion and orthodontic treatment need among school children in Lagos, Nigeria. The sample consisted of 120 randomly selected school children, 66 boys (55%) and 54 girls (45%) aged 10-12 years in Lagos State, Southwestern region of Nigeria. The study was conducted with a fixed choice questionnaire and the need for orthodontic treatment wa...

Eastern wolves have hybridized extensively with coyotes and gray wolves and are listed as a 'species of special concern' in Canada. However, a distinct population of eastern wolves has been identified in Algonquin Provincial Park (APP) in Ontario. Previous studies of the diverse Canis hybrid zone adjacent to APP have not linked genetic analysis with field data to investigate genotype-specific m...

The behavioral patterns and large territories of large carnivores make them challenging to monitor. Occupancy modeling provides a framework for monitoring population dynamics and distribution of territorial carnivores. We combined data from hunter surveys, howling and sign surveys conducted at predicted wolf rendezvous sites, and locations of radiocollared wolves to model occupancy and estimate...

To address the problem of diagnostic accuracy and stability degradation caused by random selection initial parameters for wavelet neural network (WNN) fault diagnosis model, this paper proposes a troubleshooting model based on improved gray wolf algorithm (IGWO) network. First, convergence factor policy weight update are redesigned in IGWO algorithm. This study uses nonlinear to balance global ...

Transboundary movement of wildlife results in some the most complicated and unresolved management issues across globe. Depending on location managing agency, gray wolf (Canis lupus) US ranges from preservation to limited hunting population reduction. Most studies focus size growth rate inform management, but relatively few examine species biological processes at scales aside that population. Th...

The Internet of Things (IoT) creates an environment where things are permitted to act, hear, listen, and talk. IoT devices encompass a wide range objects, from basic sensors intelligent devices, capable exchanging information with or without human intervention. However, the integration wireless nodes in systems brings about both advantages challenges. While connectivity enhances system function...