S.-L. James Hu

[Research progress in natural products for regulating intestinal microecology and treating liver diseases].

S.-L. James Hu, Shuwei Li, Yaping Liu, Hongxia Li et autres

Liver diseases have become a major challenge threating the global health, posing a heavy burden on both social and personal well-being. In recent years, the development of the gut-liver axis theory has provided new research perspectives and intervention strategies for the prevention …

cn (code pays fourni par la source)

Properties of Distributed Filtering Under Scaled Noise Covariances

Xiaoxu Lyu, S.-L. James Hu, Ling Shi

This paper investigates the properties of the distributed filter under scaled noise covariances. Initially, three performance indices, along with three auxiliary indices, are introduced to evaluate the performance of the distributed filter. By providing the specific assumptions on the scaled parameters, the …

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Research on Urban Traffic Congestion Using Dual-Modal Model of Space Syntax Based on Big Data

S.-L. James Hu, Shengwen Deng, Jianxin Shi

With the acceleration of urbanization, urban traffic congestion is becoming increasingly serious, and the uneven accessibility of urban transportation networks is evident. There are obvious shortcomings in using traditional methods to analyze the accessibility of urban transportation networks in terms of efficiency, …

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Prony-Based Method for Time-frequency Analysis of Marine Riser VIV Data

Wen Long Yang, S.-L. James Hu, Ze Li

Vortex induced vibrations (VIV) of long flexible risers subjected to ocean currents exhibit a strongly nonlinear phenomenon. Although significant efforts have been done for the frequency or time-frequency analysis of this complicated phenomenon, an effective method is still lacking. The objective of …

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Noise Issues of Modal Identification using Eigensystem Realization Algorithm

P. Li, S.-L. James Hu, H.J. Li

The eigensystem realization algorithm (ERA) is one of the most popular methods in civil engineering applications for estimating the modal parameters, including complex-valued modal frequencies and modal vectors, of dynamic systems. In dealing with noisy measurement data, the ERA partitions the realized …

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Structural Modification By Reassigning Natural Frequencies of Offshore Jacket Platforms

Min Zhang, Huajun Li, Yingchao Li, S.-L. James Hu

Offshore jacket platforms have been widely used in offshore oil and gas exploitation under hostile ocean environments. Structure damages, which may cause the change of natural frequencies, are unavoidable due to the severe environmental loads. If the natural frequencies of a damaged …

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Using Modal Frequencies For Damage Assessment In Offshore Jacket Structures

Junrong Wang, Huajun Li, Ping Li, S.-L. James Hu

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Fundamental Structural Frequency Analysis For Jacket-Type OffshoreWind Turbine

Min Zhang, Huajun Li, Ping Li, S.-L. James Hu

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Estimating Modal Parameters From Free Vibration Response of Jacket-type Platforms

Li Ping, Huajun Li, S.-L. James Hu

Accurate estimate of the modal frequencies and damping ratios of a structure is crucial to many practical engineering problems, including damage detection, structural health monitoring, etc. This article introduces the Prony 's method for identifying multiple modal frequencies and damping ratios from …

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Modal Strain Energy Decomposition Method for Damage Localization in 3D Frame Structures

Huajun Li, Hezhen Yang, S.-L. James Hu

This article presents a newly developed modal strain energy decomposition method for damage localization that is capable of identifying damage to individual members of three-dimensional (3D) frame structures. This method is based on decomposing the modal strain energy of each structural member …

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Damage localization for offshore structures by modal strain energy decomposition method

Hezhen Yang, Huajun Li, S.-L. James Hu

A newly developed damage localization method applicable to two-dimensional and three-dimensional frame structures is presented. This method is based on decomposing the modal strain energy into two parts, one associated with element's axial coordinates and the other transverse coordinates. The method requires …

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Damage Detection for 3-D Frame Structures by Modal Strain Energy Decomposition Method

Hezhen Yang, Huajun Li, S.-L. James Hu, Xun Men

A newly developed damage detection method applicable to three-dimensional frame structures is presented. This method is based on decomposing the modal strain energy into two parts, one associated with element's axial coordinates and the other transverse coordinates. The method requires only a …