Organizational crisis management has traditionally favored a centralized plan-and-control approach. This study explores the possibility for an orderly process to arise unintentionally from decentralized and spontaneous actions in onl

The mass of a magnetic coupler increases with the output its wireless power transfer system, limiting broader application this technology. It is imperative to solve trade-off between and mass. Here, we present high-power-density system designed for autonomous underwater vehicles (AUVs) based on variable ring-shaped coupler. A lightweight design achieved through topology structure, parameters are optimized analyzed. Our can eliminate gap AUV platform when charging fix posture improve...

Unmanned Aerial Vehicles (UAVs) have created safety problems for the publics. Assessments of mental workload UAV operations are essential to realize causes accidents.To test following hypotheses: i. mission difficulty in operation affects both subjective and objective measures workload; ii. number failures operation.Fourteen male adults participated as operators after attending a training course. They performed four flight missions different levels. During their missions, heart rate...

Let σ=(1,λ2,…,λn) be a list of real numbers. The symmetric doubly stochastic inverse eigenvalue problem (hereafter SDIEP) is to determine the σ which can occur as spectrum an n×n matrix A. If A positive, we necessarily obtain subproblem, positive SPDIEP), SDIEP. In this paper, give some sufficient conditions for SDIEP and SPDIEP prove that set formed by spectra all matrices non-convex n⩾4.

Abstract Variable valve timing technologies for internal combustion engines are used to improve power, torque, reduce emissions, and increase fuel efficiency. First, the paper presents a new electrohydraulic full variable actuator (FVVA) system which can control seating velocity of engine flexibly. Second, based on NSGA-II genetic algorithm, outlines multi-objective optimization strategy designs parameters FVVA make easier implement. Third, builds combined simulation model. The experimental...

Hydraulic actuators play an important role in various industries. In the last decades, to improve system performance, some advanced control methods have been developed. Backstepping control, which can deal with nonlinearities, is widely used hydraulic motion control. This paper focuses on high-frequency position servo of systems proportional valves. backstepping controllers, valve dynamics are usually ignored due difficulty controller implementation. this paper, were decoupled into phase...

Abstract The traditional motor bridge circuit always has short problems, and the smart car needs to be controlled by wire or remote control equipment. In order study application of automatic technology in cars. Using model simulation system, with mobile phone as wireless terminal, uses bluetooth communication MCU intermediate bridge, achieves direction control, voice gravity induction tracking, anti-collision other functions. system is optimized Simulation experiment. It replaces previous...

Oscillatory patterns in a one-pool model with Ca 2+ -activated IP 3 degradation are presented and classified, based on fast/slow dynamical analysis two-parameter bifurcations. The whole parameter space can be partitioned into two parts, that is, the oscillatory rest regions. For this purpose, we perform continuation of fold bifurcation, Hopf bifurcation saddle-node limit cycles, respectively. Several distinct topological types complex intracellular oscillations (especially bursting)...

Variable valve timing technologies for internal combustion engines are used to improve power, torque, and increase fuel efficiency. Details of a new solution presented in this paper optimizing motions full variable actuation (FVVA) system. The optimization is conducted at different speeds by varying motion (variable exhaust open angle, intake close velocity opening closing, overlap, dwell duration, lift) parameters simultaneously; the final optimized CY4102 diesel engine given. with standard...

Let G? be an oriented graph and S(G?) its skew-adjacency matrix, where G is called the underlying of G?. The skew-rank G?, denoted by sr(G?), rank S(G?). Denote d(G) = |E(G)|-|V(G)| + ?(G) dimension cycle spaces G, |E(G)|, |V(G)| are edge number, vertex number connected components respectively. Recently, Wong, Ma Tian [European J. Combin. 54 (2016) 76-86] proved that sr(G?) ? r(G) 2d(G) for adjacency matrix characterized graphs whose attain upper bound. However, problem lower bound in terms...

Purpose The balanced vane pump is a common transmission component in hydraulic systems. Since the physicochemical properties of water and seawater are different from that mineral oil, some problems can occur, for instance, poor lubrication, more leakage, corrosion. paper aims to demonstrate technical feasibility pump. Design/methodology/approach material combinations were selected based on related research literature. volumetric efficiency suction performance measured current experiment....

Abstract In this study, an optimization scheme for exhaust flow characteristics based on the energy-splitting method is proposed. The low-speed marine diesel engine adopts during process. Based this, a one-dimensional calculation model, three-dimensional and model of gas collection box are established. After splitting, vortex structure in same phase has larger scale, higher flowrate, more significant entropy increase, severe turbulence dissipation. length diameter high-grade optimized....

Fully variable valve actuation (FVVA) technology can improve engine performance by changing timing and lift in different conditions. To find the optimal profile parameters, power emissions have to be taken into account due contradiction between them. Therefore, paper presented a multi-objective decision making (MODM) strategy for parameters optimization. All both intake valves exhaust were optimized synchronously. We carried out global synchronous MODM with Radial Basis Function (RBF)...

To optimize the design process, a simulation model of LCC-S wireless power transfer system applied to autonomous underwater vehicles was established. Through this model, operating parameters each device in can be predicted, which provides theoretical basis and reference for construction prototype. The has batch function, quickly analyze impact parameter changes on transmission performance. built prototype verified experimentally simulated seawater environment, fully proving accuracy model.

Variable valve mechanism and its technology are widely used in vehicle diesel engines. As a critical component, the performance of reciprocating actuator is guarantee for realization electro-hydraulic variable valve. In order to solve problem high setting speed camless system, based on annular gap buffer proposed optimized realize quick closing soft landing. The experimental results show that can achieve purpose buffer, 0.5 m/s with 15 ms time. AMESim build system simulation model calibrated...