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Yaguang Heng, Bo Hu, Qifeng Jiang, Zhengwei Wang and Xiaobing Liu
A review on the rotating stall in the vaneless diffuser of centrifugal compressors is presented showing that different stall modes characterized by different numbers of cells can be detected within the diffuser even if the operating condition remains unc...
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Tilia Dahou, Françoise Defoort, Sébastien Thiéry, Maguelone Grateau, Matthieu Campargue, Simona Bennici, Mejdi Jeguirim and Capucine Dupont
A study was conducted to investigate the parameter that has influence on steam gasification kinetics between the biomass type and char preparation. Thermogravimetric analysis (TGA) was carried out on steam gasification of seven biomass samples as well as...
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Di Liu, Jianchun Fan and Shengnan Wu
This paper presents a novel acoustic wave-based method for the detection of leakage in downhole tubing of offshore gas wells. The localization model is developed on the basis of analyzing the propagation model of leakage acoustic waves and the critical f...
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Szabolcs Fischer, Nándor Liegner, Péter Bocz, Ákos Vinkó and György Terdik
This paper deals with the time-frequency characteristic analysis for track geometry irregularities using field data recorded by a comprehensive track inspection train. The parameters of the track gauge and the left and right rail alignment are considered...
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Dongbo Zhou, Gang Jiang, Jie Yu, Leyuan Liu and Wenbo Li
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Wei Guo, Xiaowei Zhang, Lixia Kang, Jinliang Gao and Yuyang Liu
Due to the complex microscope pore structure of shale, large-scale hydraulic fracturing is required to achieve effective development, resulting in a very complicated fracturing fluid flowback characteristics. The flowback volume is time-dependent, wherea...
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Liying Huang, Dongyuan Qiu, Fan Xie, Yanfeng Chen and Bo Zhang
The stability issue of a single-phase two-stage grid-connected photovoltaic system is complicated due to the nonlinear v-i characteristic of the photovoltaic array as well as the interaction between power converters. Besides, even though li...
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Zhifeng Hu, Zhinong Li, Liying Ge, Qinghua Mao and Xuhui Zhang
The problems of the synchroextracting transform method being unable to handle FM signals and being prone to time?frequency feature discontinuity in a strong noise environment are addressed by the construction of a novel rotation synchroextracting chirple...
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Jordi Burriel-Valencia, Ruben Puche-Panadero, Javier Martinez-Roman, Angel Sapena-Baño, Martin Riera-Guasp and Manuel Pineda-Sánchez
Induction machines drive many industrial processes and their unexpected failure can cause heavy production losses. The analysis of the current spectrum can identify online the characteristic fault signatures at an early stage, avoiding unexpected breakdo...
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Edgar Eduardo Roa Guerrero
Pág. 61 - 70
Nowadays, the determination of nutritional deficiencies in plants has become one of the most important analysis of crop growth. Often, this analysis is performed manually by specialized personnel for long period of time, leading to an error in the proced...
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Matthew Ng Rongfa, Teppatat Pantuphag and Sutthiphong Srigrarom
An analysis of the kinematics of a flapping membrane wing using experimental kinematic data is presented. This motion capture technique tracks the positon of the retroreflective marker(s) placed on the left wing of a 1.3-m-wingspan ornithopter. The time-...
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Lau, D.T.,Vishnukanthan, K.,Waller, C.L.,Sivathayalan, S.
Pág. 127 - 138
The current practice of detailed seismic risk assessment cannot be easily applied to all the bridges in a large transportation networks due to limited resources. This paper presents a new approach for seismic risk assessment of large bridge inventories i...
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Aykut Tamer and Pierangelo Masarati
Rotorcraft stability is an inherently multidisciplinary area, including aerodynamics of rotor and fuselage, structural dynamics of flexible structures, actuator dynamics, control, and stability augmentation systems. The related engineering models can be ...
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Kichan Sim and Kangsu Lee
A digital twin is a virtual model of a real-world structure (such as a device or equipment) which supports various problems or operations that occur throughout the life cycle of the structure through linkage with the actual structure. Digital twins have ...
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Yizheng Yu, Pengxiang Lv, Xiao Liu and Xiang Liu
The flow-induced vibration characteristic of the U-section rubber outer windshield structure of high-speed train is the key factor to limit its high-speed movement. Accurate and effective flow-induced vibration analysis of windshield structures is an imp...
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Nan Zhang, Xiaoming Xue, Na Sun, Yanhui Gu, Wei Jiang and Chaoshun Li
This paper investigates the nonlinear modeling and stability of a doubly-fed variable speed pumped storage power station (DFVSPSPS). Firstly, the mathematical model of DFVSPSPS with surge tank considering nonlinear pump turbine characteristics was derive...
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Sisi Pan, Wei Jiang, Ming Li, Hua Geng and Jieyun Wang
Real-time Simulation (RTS) is one of the effective means via which to study device level or system level dynamics, such as power converter online testing, evaluation, and control, and power system stability analysis. The RTS -enabled design-chain offers ...
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Nellyzeth Flores, Marco A. Reyna, Roberto L. Avitia, Jose Antonio Cardenas-Haro and Conrado Garcia-Gonzalez
Cardiovascular disease (CVD) is a global public health problem. It is a disease of multifactorial origin, and with this characteristic, having an accurate diagnosis of its incidence is a problem that health personnel face every day. That is why having al...
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Hanxin Chen, Shaoyi Li and Menglong Li
Conventional signal processing methods such as Principle Component Analysis (PCA) focus on the decomposition of signals in the 2D time?frequency domain. Parallel factor analysis (PARAFAC) is a novel method used to decompose multi-dimensional arrays, whic...
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Toma? Kern, Eva Krhac Andra?ec, Benjamin Urh and Marjan Senegacnik
An essential characteristic of the new product development process is to develop a new marketable product in the shortest possible time with the lowest reasonable costs. Therefore, the key factor of the process is efficiency. The paints and coatings indu...
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