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Smart model for accurate estimation of solar radiation

Lazhar ACHOUR, Malek BOUHARKAT, Ouarda ASSAS, Omar BEHAR

Frontiers in Energy 2020, Volume 14, Issue 2,   Pages 383-399 doi: 10.1007/s11708-017-0505-3

Abstract: Prediction of solar radiation has drawn increasing attention in the recent years. This is because of the lack of solar radiation measurement stations. In the present work, 14 solar radiation models have been used to assess monthly global solar radiation on a horizontal surface as function of three parameters: extraterrestrial solar irradiance ( ), duration sunshine ( ) and daylight hours ( ). Since it has been observed that each model is adequate for some months of the year, one model cannot be used for the prediction of the whole year. Therefore, a smart hybrid system is proposed which selects, based on the intelligent rules, the most suitable prediction model of the 14 models listed in this study. For the test and evaluation of the proposed models, Tamanrasset city, which is located in the south of Algeria, is selected for this study. The meteorological data sets of five years (2000–2004) have been collected from the Algerian National Office of Meteorology (NOM), and two spatial databases. The results indicate that the new hybrid model is capable of predicting the monthly global solar radiation, which offers an excellent measuring accuracy of values ranging from 93% to 97% in this location.

Keywords： global solar radiation     statistical indicator     hybrid model     spatial database     correlation coefficients    

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Improving Internationally Core Competences Based on the Capabilities of Precise and Accurate Project

Zhen-you Li,Ji-shan He,Meng-jun Wang

Frontiers of Engineering Management 2016, Volume 3, Issue 3,   Pages 231-238 doi: 10.15302/J-FEM-2016032

Abstract: Modern international project management has entered the phase of precise and accurate project managementthere has been lack of explicitly unanimous definition for the capability dimensions of precise and accurateThe required core capabilities based on the precise and accurate project management for various ringsThrough studying the effects of the internationally core competences based on precise and accurate project

Keywords： precise and accurate project management     project strategic planning     decision-making     project supervision    

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Esophageal pulse oximetry is more accurate and detects hypoxemia earlier than conventional pulse oximetry

Guo Chen, Zhaoqiong Zhu*, Jin Liu, Wei Wei

Frontiers of Medicine 2012, Volume 6, Issue 4,   Pages 406-410 doi: 10.1007/s11684-012-0217-3

Abstract: In conclusion, SoesO2 is more accurate and enables earlier detection of hypoxemia when

Keywords： esophageal pulse oximetry     conventional pulse oximetry     hypoxemia    

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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structural analysis. Adding the fictitious inertia and damping forces to the static equation, and turning it to the dynamic system, are the basis of this technique. Proper selection of the DRM artificial factors leads to the better convergence rate and efficient solutions. This study aims to increase the numerical stability, and to decrease the analysis time. To fulfil this objective, the reduction rate of analysis error for consecutive iterations is minimized. Based on this formulation, a new time step is found for the viscous dynamic relaxation. After combining this novel relationship with the other DRM factors, various geometrical nonlinear structures, such as, trusses, frames and shells are analyzed. The obtained results verify the efficiency of authors’ scheme.

Keywords： viscous dynamic relaxation     time step     displacement error     geometric nonlinear analysis    

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An Ultracompact Spoof Surface Plasmon Sensing System for Adaptive and Accurate Detection of Gas Using

Xuanru Zhang,Jia Wen Zhu,Tie Jun Cui,

Engineering doi: 10.1016/j.eng.2023.05.013

Abstract: For applications in the Internet of Things (IoT), accurate detection of resonance frequency shifts usingThis study provides an ultracompact, accurate, adaptive, sensitive, and wireless solution for resonant

Keywords： Spoof surface plasmons     Internet of Things     Integrated sensing     Resonance tracking     Microwave sensing    

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An adaptive data-driven method for accurate prediction of remaining useful life of rolling bearings

Yanfeng PENG, Junsheng CHENG, Yanfei LIU, Xuejun LI, Zhihua PENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 301-310 doi: 10.1007/s11465-017-0449-7

Abstract:

A novel data-driven method based on Gaussian mixture model (GMM) and distance evaluation technique (DET) is proposed to predict the remaining useful life (RUL) of rolling bearings. The data sets are clustered by GMM to divide all data sets into several health states adaptively and reasonably. The number of clusters is determined by the minimum description length principle. Thus, either the health state of the data sets or the number of the states is obtained automatically. Meanwhile, the abnormal data sets can be recognized during the clustering process and removed from the training data sets. After obtaining the health states, appropriate features are selected by DET for increasing the classification and prediction accuracy. In the prediction process, each vibration signal is decomposed into several components by empirical mode decomposition. Some common statistical parameters of the components are calculated first and then the features are clustered using GMM to divide the data sets into several health states and remove the abnormal data sets. Thereafter, appropriate statistical parameters of the generated components are selected using DET. Finally, least squares support vector machine is utilized to predict the RUL of rolling bearings. Experimental results indicate that the proposed method reliably predicts the RUL of rolling bearings.

Keywords： Gaussian mixture model     distance evaluation technique     health state     remaining useful life     rolling bearing    

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Seismic performance of viaducts with probabilistic method

ZHU Xi, WANG Jianmin

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 267-273 doi: 10.1007/s11709-007-0034-y

Abstract: RHA requires a lot of complicated analysis for the structure, the results from RHA are reliable and accurate

Keywords： uncertainty     Earthquake Engineering     regression analysis     accurate     fragility    

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Damage identification of a large-span concrete cable-stayed bridge based on genetic algorithm

ZHU Jinsong, XIAO Rucheng

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 170-175 doi: 10.1007/s11709-007-0018-y

Abstract: demonstrated that the results of damage identification from the parametric finite element method are accurate

Keywords： accurate     primary     global stability     complex     identification    

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Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 379-384 doi: 10.1007/s11709-012-0180-8

Abstract: decoupling, matrix inversion and iteration methods, it is shown that the presented method can produce accurate

Keywords： isolated structure     stochastic response     non-proportional damping     efficient     accurate     pseudo-excitation    

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Optimization model for rotor blades of horizontal axis wind turbines

LIU Xiong, CHEN Yan, YE Zhiquan

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 483-488 doi: 10.1007/s11465-007-0084-9

Abstract: Compared with the simple genetic algorithm, ECGA runs much faster and can get more accurate results with

Keywords： population     extended     algorithm     developed optimization     accurate    

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Accurate quantification of 3′-terminal 2′-O-methylated small RNAs by utilizing oxidative deep sequencing

Frontiers of Medicine 2022, Volume 16, Issue 2,   Pages 240-250 doi: 10.1007/s11684-021-0909-7

Abstract: Accurate measurement of the 3′-terminal 2′-O-methylation of small RNAs has profound implications for

Keywords： small RNAs     2′-O-methylation     sequencing     RT-qPCR    

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3D Printing Hip Prostheses Offer Accurate Reconstruction, Stable Fixation, and Functional Recovery for Article

Yongqiang Hao, Lei Wang, Wenbo Jiang, Wen Wu, Songtao Ai, Lu Shen, Shuang Zhao, Kerong Dai

Engineering 2020, Volume 6, Issue 11,   Pages 1285-1290 doi: 10.1016/j.eng.2020.04.013

Abstract:

Complicated and large acetabular bone defects present the main challenges and difficulty in the revision of total hip arthroplasty (THA). This study aimed to explore the advantages of three-dimensional (3D) printing technology in the reconstruction of such acetabular bone defects. We retrospectively analyzed the prognosis of four severe bone defects around the acetabulum in three patients who were treated using 3D printing technology. Reconstruction of bone defect by conventional methods was difficult in these patients. In this endeavor, we used radiographic methods, related computer software such as Materialise's interactive medical image control system and Siemens NX software, and actual surgical experience to estimate defect volume, prosthesis stability, and installation accuracy, respectively. Moreover, a Harris hip score was obtained to evaluate limb function. It was found that bone defects could be adequately reconstructed using a 3D printing prosthesis, and its stability was reliable. The Harris hip score indicated a very good functional recovery in all three patients. In conclusion, 3D printing technology had a good therapeutic effect on both complex and large bone defects in the revision of THA. It was able to achieve good curative effects in patients with large bone defects.

Keywords： 3D printing     Hip revision     Complex and large acetabular bone defect     Accurate reconstruction    

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A High Accurate Steady-state Physical Model for High-voltage VDMOS

Bao Jiaming,Sun Weifeng,Zhao Ye,Lu Shengli

Strategic Study of CAE 2008, Volume 10, Issue 2,   Pages 72-78

Abstract:

A high accurate steady-state physical model for high-voltage VDMOS is

Keywords： VDMOS     steady-state physical model     analytical method    

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Reduced torque ripple for rotational load with high inertia of HY-2A satellite

Zhou Yong,Li Zhengjun,Ma Chao and Wang Xiaoning

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 43-49

Abstract: The control system and motor has been simulated by accurate model，results show that the torque ripple

Keywords： high inertia     torque ripple     quantization error     dead time     accurate model    

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Constitutive Model for an FCC Single-Crystal Material

DING Zhi-ping, LIU Yi-lun, YIN Ze-yong, YANG Zhi-guo, CHENG Xiao-ming

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 40-47 doi: 10.1007/s11465-005-0012-9

Abstract: predict the yield stresses of an internal single-crystal, Nickel-based superalloy, DD3, which is more accurate

Keywords： orthotropic     Thinking     accurate     prediction     corresponding    

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Title Author Date Type Operation

Smart model for accurate estimation of solar radiation

Lazhar ACHOUR, Malek BOUHARKAT, Ouarda ASSAS, Omar BEHAR

Journal Article

Improving Internationally Core Competences Based on the Capabilities of Precise and Accurate Project

Zhen-you Li,Ji-shan He,Meng-jun Wang

Journal Article

Esophageal pulse oximetry is more accurate and detects hypoxemia earlier than conventional pulse oximetry

Guo Chen, Zhaoqiong Zhu*, Jin Liu, Wei Wei

Journal Article

A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article

An Ultracompact Spoof Surface Plasmon Sensing System for Adaptive and Accurate Detection of Gas Using

Xuanru Zhang,Jia Wen Zhu,Tie Jun Cui,

Journal Article

An adaptive data-driven method for accurate prediction of remaining useful life of rolling bearings

Yanfeng PENG, Junsheng CHENG, Yanfei LIU, Xuejun LI, Zhihua PENG

Journal Article

Seismic performance of viaducts with probabilistic method

ZHU Xi, WANG Jianmin

Journal Article

Damage identification of a large-span concrete cable-stayed bridge based on genetic algorithm

ZHU Jinsong, XIAO Rucheng

Journal Article

Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Journal Article

Optimization model for rotor blades of horizontal axis wind turbines

LIU Xiong, CHEN Yan, YE Zhiquan

Journal Article

Accurate quantification of 3′-terminal 2′-O-methylated small RNAs by utilizing oxidative deep sequencing

Journal Article

3D Printing Hip Prostheses Offer Accurate Reconstruction, Stable Fixation, and Functional Recovery for

Yongqiang Hao, Lei Wang, Wenbo Jiang, Wen Wu, Songtao Ai, Lu Shen, Shuang Zhao, Kerong Dai

Journal Article

A High Accurate Steady-state Physical Model for High-voltage VDMOS

Bao Jiaming,Sun Weifeng,Zhao Ye,Lu Shengli

Journal Article

Reduced torque ripple for rotational load with high inertia of HY-2A satellite

Zhou Yong,Li Zhengjun,Ma Chao and Wang Xiaoning

Journal Article

Constitutive Model for an FCC Single-Crystal Material

DING Zhi-ping, LIU Yi-lun, YIN Ze-yong, YANG Zhi-guo, CHENG Xiao-ming

Journal Article