In this paper, a diffusive zooplankton–phytoplankton model with time delay and hunting cooperation is established. First, the existence of all positive equilibria their local stability are proved when system does not include diffusion. Then, Hopf bifurcation at equilibrium by taking as parameter, direction bifurcating periodic solutions investigated using center manifold theorem normal form theory in partial differential equations. Next, according to Turing bifurcation, conditions for...

A rapid star tracking algorithm is proposed. In order to speed up the tracking, three techniques includng parallel centroiding, sorting, and catalogue partition are designed for time-consuming portions in algorithms. The centroiding implemented with Field Programmable Gate Array (FPGA) which avoid image storage transmission. Update rate of sensor improved. Sorting coordinates plane, then matching, matching between stars a long distance plane. Star divides celestial sphere into many small...

Due to the complexity of structure and process large‐scale petrochemical equipment, different fault characteristics are mixed present multiple couplings ambiguities, leading difficulty in identifying composite faults rotating machinery. This paper proposes a diagnosis method for machinery large unit based on evidence theory multi‐information fusion. The fusion mainly deal with multisource information conflict information, synthesize uncertain obtain synthetic from data sources. To detect...

A master-slave control method based on the identifications of load force and impedance for Tele-operated hydraulic construction robot system is presented in this paper. The composed a excavator two joysticks. served as robot. joysticks are used operating remote region. master actuator slave joystick-gear joystick fork-glove respectively. identifiers identifying According to force, controller controls generate reaction operator. On basis error, perform working task. experimental researches...

Enhancing the industrial yeast strains ethyl acetate yield through a precise and seamless genetic manipulation strategy without any extraneous DNA sequences is an essential requisite significant demand.For increasing of brewer's strain, all ATF1 alleles were overexpressed "self-cloning" integration strategy.Escherichia coli strain DH5α was utilized for plasmid construction. insertion PGK1 promoter in S6. In addition, growth rates, mRNA levels, AATase activity, fermentation performance...

In this paper, a diffusion two‐phytoplankton one‐zooplankton model with time delay, Beddington–DeAnglis functional response, and Holling II response is proposed. First, the existence local stability of all equilibria such are studied. Then, Hopf bifurcation corresponding without given by taking delay as parameter. Next, direction bifurcating periodic solutions investigated using normal form theory center manifold theorem. Furthermore, due to partial differential equations, considering The...

We propose an improved Kane dynamic model theory for the 7‐DOF modular robot in this paper, and precision is by function . designed three types of progressive joints reconfigurable that can be used industrial robot, space special robot. The solid are established, respectively, After that, experimental results obtained from simulation experiment typical task established models. By analysis error, equation torque derived proposed. And Based on data, undetermined coefficient matrix five‐order...

ABSTRACT In the clinical application of parallel external fixator, medical practitioners are required to quantify deformity parameters develop corrective strategies. However, manual measurement angles is a complex and time‐consuming process that susceptible subjective factors, resulting in nonreproducible results. Accordingly, this study proposes an automatic method based on deep learning, comprising three stages: tibial segment localization, contour point detection, angle calculation....

With the rapid development of large language models (LLM), robots are starting to enjoy benefits new interaction methods that bring. Because edge computing fulfills needs for response, privacy, and network autonomy, we believe it facilitates extensive deployment robot navigation across various industries. To enable local on devices, adopt some model boosting methods. In this paper, propose FASTNav - a method lightweight LLMs, also known as small (SLMs), navigation. The proposed contains...

To solve the problem of power loss load flow detection in hydraulic regulating pump (HFRP), a new method to identify by using neural network identifier (NNLFI) is proposed. improve accuracy HFRP with NNLFI, an intelligent learning control An controller designed based on combination pid controller, fuzzy (FNNC), mechanism and regulator. The proposed methods are applied electrohydraulic proportional controlled HFRP. experimental results proved that can avoid achieve higher than traditional...

To improve the convergence rate, multiple input vectors are used to update filter coefficients in affine projection algorithm (APA) family, however, different vector affects differently. The ideal selection criterion of is derived by largest decrease mean-square deviation. This condition fits for algorithms APA family. Based on criterion, a family APAs which dynamically select presented. experimental results show that proposed have fast speed, small steady-state error compared conventional...

We consider designing a robust structured sparse sensing matrix consisting of with few non-zero entries per row and dense base for capturing signals efficiently design the through minimizing distance between Gram equivalent dictionary target holding small mutual coherence. Moreover, regularization is added to enforce robustness optimized representation error (SRE) interests. An alternating minimization algorithm global sequence convergence proposed solving corresponding optimization problem....

This paper developed a coal-fired boiler modeling method based on CNN (convolutional Neural Network). In recent years, the deep learning using has made remarkable achievements in image research field. combined convolution and signal system theory modeling, which regards DCS records as time series signal. network is consisted of two convolutional layers map input to feature map, followed by fully connected model output. All parameters network, including kernel parameter are optimized...

Aiming at improving the interpolation efficiency without lowering machining accuracy, velocity look-ahead algorithm in numerical control (NC) system is introduced. Firstly, path’s transferring vector angle model established, and then conditions of direct transfer for adjacent paths are also discussed. Secondly, based on linear acceleration/deceleration control, put forward which can find approximate-optimal adaptively according to maximum number blocks geometric properties path. Finally,...

We propose a totally novel method based on revised ant colony clustering algorithm (ACCA) to explore the topic of textural defect detection. In this algorithm, our efforts are mainly made definition local irregularity measurement and implementation ACCA. The irregular defined evaluates inconsistency each pixel against their mini-environment. ACCA, behaviors divided into two steps: release pheromone act. quantity released is proportional measurement; actions ants act next chosen independently...