The calibration of parameters for pelleted rice seeds (PR) is crucial enhancing research on PR-related machinery and executing high-speed precision hole sowing with unmanned aerial vehicles. This paper focuses determining the fundamental physical contact PR. A series tests were conducted, including Plackett-Burman test, steepest ascent Box-Behnken using stacking angle as primary variable. These led to identification optimal combinations simulation parameters. Specifically, coefficients...

Cycloid gear drive is widely used in robot cycloid planetary reducer, and the transmission accuracy key property of reducer. The standard a multi-tooth mesh. modification method has attracted extensive attention as one important parameters drive. influence isometric shifting on backlash was analysed according to characteristics mesh profile equation modified this study. Combined with analysis, multi-objective optimization mathematical model established ensure strength study showed that...

Reinforced concrete (RC) is the result of a combination steel reinforcing rods (which have high tensile) and has compressive strength). Additionally, prediction long-term deformations RC flexural structures magnitude influence relevant material geometric parameters are important for evaluating their serviceability safety throughout life cycles. Empirical methods predicting deformation limited due to difficulty considering all influencing factors. In this study, four popular surrogate models,...

Ti3C2Tx MXene, as a common two-dimensional material, has wide range of applications in electrochemical energy storage. However, the surface forces few-layer or monolayer MXene lead to easy agglomeration, which hinders demonstration its performance due characteristics layered materials. Herein, we report facile method for preparing on nickel foam achieve self-supporting structure supercapacitor electrodes under high electrostatic fields. Moreover, specific capacitance varies with deposition...

New energy vehicles driven by electric motors have higher requirements for the lightweight and high reliability of their gear transmission devices. It is now necessary to optimize precision forming process structural gears. The integrated structure without undercut produced technology can reduce axial size while improving strength parts. Based on performance parts in practical applications, a plan "hot forging +cold trimming tooth shape" was developed, compared with existing hot extrusion...

Digital twin channel (DTC) is the real-time mapping of a wireless for physical communication in digital world, which expected to be one essential enablers sixth-generation (6G) systems and provides significant performance enhancements air-interface design. In this work, we first define evolution five levels twins with progression communication. The autonomous DTC 6G elaborated from multi-dimensional factors such as methodology, characterization precision, data category. Then, provide...

By using the Poincaré-like cell-to-cell mapping method and shooting method, global characteristics of a planetary gear train are studied based on torsional vibration model with errors transmission, time-varying meshing stiffness, multiple backlashes. The study results reveal that certain set parameters has four coexisting periodic orbits, which P-1, P-2, P-4, P-8, respectively. P-1 P-2 motions not long-term stability, P-8 motion is local P-4 stability. Shooting does have capacity searching...

To improve the dynamics of face gear transmission system, a nonlinear model considering gyroscopic effects and including parameters such as time-varying meshing stiffness, damping, tooth side clearance, support stiffness damping is developed. The Runge-Kutta method was used to solve kinetic equations analyze accuracy reasonableness calculation results. vibration displacement, velocity acceleration along each direction straight cylindrical were analyzed, torsional characteristics center mass...

A new teaching method is put forward in theory mechanics practice. This advocate the application of numerical simulation practice foster ability grasping whole process a kinematic period mechanism from macroscopic view. By using dynamic technology mechanism, mechanical engineer can realize motion animation and decrease difficulty students understanding process. Dynamic also provide important reference for following design set up theoretical study engineering

As a new technology for reconstructing communication environments, intelligent reflecting surfaces (IRSs) can be applied to UAV systems. However, some challenges exist in IRS-assisted system design, such as physical layer security issues, IRS and power consumption issues owing the limitation of hardware. Therefore, secrecy capacity optimization scheme an active unmanned aerial vehicle (UAV) is proposed solve multi-user issues. In particular, controllable amplifiers are integrated into units...

Strain-Hardening Prediction of dP600 Steel conSidering tHe HeterogeneouS deformation Between ferrite and martenSiteDual-phase steels have received extensive attention in autobody frame manufacturing due to the resulting characteristics an interesting combination ductile hard martensite.Moreover, martensite lead heterogeneous boundary between two phases.Then, geometrically necessary dislocations (GnDs) are created accommodate a lattice mismatch incompatibility straining.in this study, new...

In order to solve the problem of chaotic parking bicycles in colleges and universities, which is easy cause traffic jams, a bicycle device suitable for universities designed. The whole structure designed modeled by using SolidWorks software. Through theoretical calculation static stress analysis, we can know that structural strength this paper meet requirements practical use. plays good guiding role solving campus congestion caused random centralized occupying pedestrian passageways.

Abstract Identification of key geometric errors is an essential prerequisite for improving the machining accuracy five-axis machine tools. This paper presents a new sensitivity analysis (SA) method to extract errors, and then improve performance tools by compensating error components. Development prediction model involved obtain values at arbitrary positions first. Based on multi-body system theory flank milling theory, developed, which considers 37 errors. Then, SA introduced taking as...

Abstract Identification of key geometric errors is an essential prerequisite for improving the machining accuracy five-axis machine tools. This paper presents a new sensitivity analysis (SA) method to extract errors, and then improve performance tools by compensating error components. Development prediction model involved obtain values at arbitrary positions first. Based on multi-body system theory flank milling theory, developed, which considers 37 errors. Then, SA introduced taking as...