The vibration and noise of permanent magnet synchronous motors (PMSM) are mainly caused by unbalanced magnetic pull (UMP). This paper aims to investigate nonlinear in PMSMs. Firstly, the analytical model air-gap field with an eccentric rotor PMSM is studied, verified finite element method. Then dynamic offset rotor-bearing system established, gyroscopic effect, bearing force UMP taken into consideration. Finally, characteristics different static displacement eccentricities, offsets radial...

<title/> Objectives: The purpose of this study was to investigate the ability bone marrow mesenchymal stem cells (BMSCs) survive in striatum and improve motor function quinolinic acid (QA) lesion rat model Huntington's disease (HD). Methods: One week following QA lesioning striatum, rats were transplanted with BMSCs that had been expanded culture labeled 4′-6-diamidino-2-phenylindole (DAPI) prior transplantation. Results: survived transplantation into lesioned differentiated both neurons....

The viscoelastic damping is one of key factors that affect vehicle vibration. It has been demonstrated fractional derivative model can accurately this kind frequency dependence very well. Generally, the excitation rough road be acted as a stationary random vibration process in time domain when traveling at constant speeds. But roughness should considered non-stationary variable In paper, investigated by using model. built PSD (power spectral density) space Laplace transform. proposed method...

Multi-camera person tracking has gained significant attention in recent times, owing to its widespread application surveillance scenarios. However, this task is challenging due the variance viewpoints, heavy occlusion, and illumination changes. In order tackle these challenges, we propose a novel Hierarchical Clustering Refinement framework for Generalized Multi-Camera Person Tracking. Specifically, our comprises two main components: hierarchical clustering refinement. Compared with directly...

During the wire electrical discharge machining (WEDM) process, vibrations of generated by gap force is main cause imprecision. To achieve more precise results with better accuracy, understanding vibration management essential. In this article, wire’s behavior introduced briefly, followed an exploration equation, derived from Hamilton’s principle, which expresses a moving axially. This equation presented under some simplified assumptions. addition, relationship between maximum amplitude and...

In order to enhance motor torque performance of existing two-phase 8/10 E-Core SRM, an improved modular permanent magnet (PM)-assisted Switched Reluctance Motor (SRM) structure is presented. Firstly, basic and operation principle the proposed are introduced. To further evaluate improvement, effects various parameters on design such as inductance, flux-linkage, average cogging compressively investigated by finite element method (FEM) software subsequently. meantime, comparisons with other SRM...

Existing methods combining skeleton and silhouette representations demonstrate explicit effectiveness for gait recognition. However, current related simply combine the video-level of model-based data silhouettes retrieval. Therefore, diverse information is not fully exploited in existing works: Firstly, position movement bones are clear from individual silhouettes. This indicates that frame-level interaction between features skeletons critical, which ignored by previous methods. Secondly,...

This paper mainly focus on vibration friction and discuss the dynamic characteristics of under working condition. It is rather valuable to study such a special kind in engineering. Many practical projects have already proved that condition, force between workpieces can be reduced obviously. Wear damage machine parts obviously decreaed.The work efficiency improved greatly. The Characteristic condition described firstly. Two fundamental experiments illustrate basic features friction. With...

In a 350km/h high speed railway line, there is seamless switch with ballastless slabs built on bridge. 54 Fiber Bragg Grating detecting cells are employed to monitor the displacement of track and slab. The cell extending function measurement range, up 50mm displacement, good linearity. Protecting methods for fiber adopted keep them surviving from harsh conditions. results show that in 75 days, sleeper slab was 8-9mm, correlation daily environmental temperature change.

&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;Due to the compact structure of Bacha Racing vehicle, continuously variable transmission (CVT) serves as a crucial component. It is essential tune and verify its performance ensure power matching efficiency entire vehicle. This paper conducts kinematic analysis CVT based on theory, designs real vehicle traction experiments, bench tests. Additionally, it proposes method utilize Hall sensors for real-time monitoring...

With the widespread application of fiber-metal laminates in various aerospace fields and inherent presence both material geometric nonlinearities composites, prediction nonlinear vibration characteristics these structures holds particular importance. This study, based on Jones–Nelson–Hui von Kármán theories, utilizes energy method orthogonal polynomial to solve differential equations iteratively obtain natural frequencies responses. Additionally, complex modulus is employed calculate modal...

In order to address the issue of poor fuel efficiency in hydraulic bulldozers during operation, this paper proposes a speed–load control strategy aimed at minimizing overall consumption rate machine. First, input–output models engine, torque converter and entire vehicle were established. Then, based on bulldozer’s output power rate, performance metric for was proposed reflect machine’s working efficiency. The characteristics analyzed under different load, speed, gear conditions. Next, work...

Abstract In high angle wells, downhole tractors can be used for electric line (e-line) deployed toolstring conveyance. This paper presents the job design, planning, and execution of a rigless zonal isolation in gas well located Gulf Mexico. Downhole were as method conveyance during this isolation. A deepwater direct vertical access was suspected to have had sand failure event. The assessed identified candidate big-hole sidetrack (BHST). preparation BHST, planned performed prior decomplete....

This paper proposes an analytical approach to study self-synchronous motion and stabilizing conditions of a novel vibrating mechanism excited by two unbalanced rotors. begins with utilizing Lagrange equation establish differential equations the system, then obtains dimensionless coupled rotors modified average small parameter method. The zero solutions are used achieve condition implement self-synchronization finally Routh-Hurwitz criterion is derive stability.

The time-saving single-camera training(SCT) person re-identification aims to learn camera-invariant information without cross-camera pedestrian annotations. To address this challenging task, we propose a novel approach called Multi-Experts Guided Learning Network (MEGL-Net) for SCT-ReID that can obtain features not influenced by camera views at the global and local levels under guidance of multi-camera experts. Firstly, features, an adaptive feature integration module (AFI) is introduced...

In this study, a rotor-bearing-runner system (RBRS) considering multiple nonlinear factors is established, and the complex dynamic behavior of coupling studied. The effects excitation current, radial stiffness, friction coefficient on characteristics are analyzed by numerical simulation. research results show that properties caused different interactional. With changes parameters, RBRS presents motion states, including periodic-n, quasi-periodic, chaotic motion. increase current Ij has...

The single-mass nonlinear oscillatory system is presented. hard characteristics of vibration springs are taken into account. Based on Lagrange Equations, the motion differential equations set up. Hamilton principle, synchronous operation condition was deduced. According to first order approximate stability discriminance, steady-state in balance point obtained. With MATLAB/ Simulink, dynamic solved by 4-rank Runge-Kutta algorithm and parameter data at steady state conditions got. Substitute...