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تشنغتشو ، الصين

البريد الإلكتروني

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a set of characteristics extraction pump

Pumps and compressors for supercritical extraction:

Supercritical extraction processes entail pumping, ducting and metering the flow of fluids over a very wide range of conditions. These may range from pressures not far above the The characteristic frequency extraction of fluid machinery is attracting considerable interest not only because of its help to condition monitoring and fault The Enkurgram: A characteristic frequency extraction

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(PDF) CFD Simulation of a Solvent Extraction Pump

PDF Mixer-settler equipment is widely used for solvent extraction (SX) operations. The pump mixer is the heart of an SX Abstract. Aiming at the characteristic that the vibration signals of hydraulic pump usually have strong nonlinearity and low signal-to-noise ratio, this article Degradation feature extraction of the hydraulic pump based on

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A New Design of the Surface Drive of the Screw Pump for the

The work is devoted to modernization of the surface drive of a screw pump for extraction of high-viscosity oil. The peculiarity of these units is that it has the ability to To overcome the interference and background noise in the vibration signatures (VS) of the centrifugal pump, the fault diagnosis method selects the fault-specific frequency band (FSFB) in the first step. Sensors Free Full-Text Multistage Centrifugal Pump

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Analysis of the Dynamic Characteristics of the Pump Valve System

Based on dynamic mesh technology, we analyzed the coupling characteristics of pump valve and plunger motion and spool force considering the Degradation feature extraction of the hydraulic pump based on local characteristic-scale decomposition and multi-fractal spectrum Zaike Tian, Hongru Li, Degradation feature extraction of the hydraulic pump based on

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Dynamic feature extraction and recognition of flow states in

Hydrodynamic feature extraction of pressure pulsation signals (PPSs) and intelligent identification of flow regimes in vaneless space (VAS) of a pump turbine This paper proposed a new discriminant feature extraction. method for CP fault diagnosis based on correlations. The. proposed method is divided into three phases. In the ﬁrst. phase, Discriminant Feature Extraction for Centrifugal

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Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump

This study presents a comprehensive investigation of the internal noise characteristics of a mixed-flow pump by combining computational fluid dynamics (CFD) and computational acoustics. The turbulent flow field of the pump is simulated using the unsteady SST k-ω turbulence model in CFD. The contributions of the volute, guide vanes, and impeller to This paper proposes a three-stage fault diagnosis strategy for multistage centrifugal pumps. First, the proposed method identifies and selects fault characteristic modes of vibration to overcome the substantial noise produced by other unrelated macro-structural vibrations. In the second stage, raw hybrid statistical features are extracted Multistage Centrifugal Pump Fault Diagnosis by Selecting Fault

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Machines Free Full-Text Investigation of Transient Characteristics

The aim of this paper is to study the influence of non-uniform suction flow on the transient characteristics of a vertical axial-flow pump device. The unsteady calculation is employed to forecast the unstable flow structure with three inlet deflection angles α, and the calculation accuracy under uniform inlet flow is verified by the external To solve the problem, we made a MathCAD program (Fig. 3), in which we solve the system of inequalities, including the equations of kinematic balance of the drive for options 1 − 4 with the requirement of achieving no more than 2% deviation from the set frequency of rotation of the output shaft. According to the results of the calculation (see A New Design of the Surface Drive of the Screw Pump for the Extraction

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Machines Free Full-Text Numerical and Experimental Study of

The slurry pump is widely used in ore mining, metal smelting, petrochemical, and other industries, mainly to transport fluid media containing large solid particles. Importantly, it is easy to damage the impeller of a slurry pump in the operation process, which greatly affects the performance of the pump. In this paper, a 25 MZ slurry represent a text document as a set of con- cepts, rather than as a set of words. Similarly, category can be identified by a set of concepts (or corresponding groups of characteristic terms) as well. Text classifica- tion usually focuses on topic concepts. Obvi- ously, the set of characteristic terms identif-An effective concept extraction method for improving text

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Characteristic extraction device, characteristic evaluation device

What is claimed is: 1. A characteristic extraction device extracting a parameter expressing a velocity saturation effect of a MOS transistor, comprising: (a) an effective channel length extraction part receiving a signal expressing measured data of a characteristic of said MOS transistor and extracting an effective channel length of said MOS transistor for at Dynamic feature extraction of pressure fluctuation signals and recognition of flow states in vaneless space have important engineering significances to guarantee the operational stability of the prototype reversible pump turbine (RPT) in the pumped hydro energy storage power station. In the present paper, in order to carry out Dynamic feature extraction and recognition of flow states in

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Effective component extraction for hydraulic pump pressure

Hydraulic pump is the essential power source of the hydraulic transmission system. Known as the “heart” of the hydraulic system, it has been widely used in machinery equipment of the diverse fields, including industry and national defense. 1–3 Once the pump fails, it may lead to shutdown or affect product quality. In the worst case scenario, it will Request PDF A novel method based upon modified composite spectrum and relative entropy for degradation feature extraction of hydraulic pump Feature extraction is a key step of Prognostics andA novel method based upon modified composite spectrum

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Sensors Free Full-Text Weak Knock Characteristic

To solve the problem of the weak knock characteristic extraction for a port-injected two-stoke spark ignition (SI) unmanned aerial vehicle (UAV) engine burning aviation kerosene fuel, which is also The geometric configurations of the pump-mixer studied are: (a) an R320 curved blade impeller, with variable clearance from the tank bottom, and (b) a multiple impeller set-up produced by the(PDF) CFD Simulation of a Solvent Extraction Pump

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EEG Characteristics Extraction and Classification Based on R

Reasonable selection of two regular parameters to achieve the best feature classification effect, when the number of aa, al samples are 200 and 100 respectively, the regularized parameters are both set to 0, when the number of av and aw samples are 80 and 56 respectively, the optimal regularization parameters \( \beta = 0, Hydraulic pump degradation feature extraction is a key step of condition-based maintenance. In this article, a novel method based on high-frequency harmonic local characteristic-scale decomposition sub-signal separation and discrete cosine transform high-order singular entropy is proposed.Degradation feature extraction of the hydraulic pump based on

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电磁散射特征提取与成像识别算法综述 radars

合成孔径雷达(sar)图像的自动化解译是合成孔径雷达技术应用的重要发展方向之一。电磁散射特征与目标结构具有稳健的关联性，是sar图像解译的关键支撑。近年来，如何准确地实现电磁特征提取以及利用电磁特征反演目标特性受到了广泛的重视。该文讨论了电磁特征提取和基于电磁散射特征识别Against the backdrop of the rapid burgeoning of international energy engineering, the efficient utilization of energy is a paramount factor. The key idea in this paper is to propose an elliptical rotor scraper pump (ERSP) in order to address the imperfections and defects of traditional volume pumps, such as their labyrinthine design, Machines Free Full-Text Modeling, Kinematic Characteristics

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Sensors Free Full-Text Weak Knock Characteristic Extraction of a

To solve the problem of the weak knock characteristic extraction for a port-injected two-stoke spark ignition (SI) unmanned aerial vehicle (UAV) engine burning aviation kerosene fuel, which is also known as the Rocket Propellant 3 (RP-3), the Intrinsic modal Functions Energy (IMFE) method is proposed according to the orthogonality of the 2 Data Description and R-CSP Feature Extraction 2.1 Experimental Data The experimental data are based on the public data of the third Brain computer interface Contest in 2005. In this paper, the EEG data of motor imagery (Data set IVa) provided by neurology department of Berlin research center in Germany is used to verify the algorithm.EEG Characteristics Extraction and Classification Based on R

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Analysis of the Energy Loss and Performance Characteristics in a

The energy loss inside a centrifugal pump has a significant effect on its performance characteristics. Based on the structural characteristics of the humpback pectoral fin, a new tongue was designed to improve the performance of the centrifugal pump. The influence of three sinusoidal tubercle volute tongues (STVT) and one original

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