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To improve the energy conversion and efficiency, a micro-planar with arranged inlet-fins and bluff-bodies is proposed for H 2 -fueled micro thermophotovoltaic system. Effects of inlet-fins and bluff-bodies setting and combustor dimensions on combustion properties, heat transfer and energy conversion are investigated and analyzed under various operating conditions. The results illustrate that the flame stability and heat transfer in combustion chamber with arranged inlet-fins and bluff-bodies are enhanced, where heat recirculation is formed and radiation temperature is boosted. According to the field synergy analysis, coupling effects of inlet-fins and bluff-bodies on burning and thermal process can be improved by the optimization of bluff-bodies setting, and the flow limit is also expanded. There is a balance of the burner dimensions effects on the augment of radiation surface area and the reduction of radiation temperature for micro power generation. Particularly, the micro-planar with L a / L = 0.62 contributes to achieve a higher radiation density, and the highest electrical output P e = 3.16 W is adopted in combustor C2-0.62 at m f = 6.751 × 10−5 kg/s. It is beneficial to promote energy output of micro-planar and the energy efficiency of micro-thermophotovoltaic system. [Display omitted] • A micro-planar with arranged inlet-fins and bluff-bodies is proposed. • Combustion characteristics and heat transfer in the burner are analyzed. • Effects of burner setting on thermal performance are investigated. [ABSTRACT FROM AUTHOR]

This article presents a novel adaptive contour control scheme for dual-linear-motors-driven gantry stages (DLMDGSs) with time-varying model parameters and disturbances, aiming to realize high-precision contour control. Specifically, a novel adaptive contour controller based on a coupled model is proposed, incorporating powerful projection adaption laws, to achieve the synchronization of multi-axis motors, regression of adaptive parameters, and high-precision contour performance. Additionally, a contour error estimation (CEE) method with four-order convergence rate is designed to ensure estimation accuracy, enhance estimation robustness, and reduce estimation time. Moreover, considering the periodicity of common control contour tasks, an iterative learning control (ILC) reference trajectory compensation structure is adopted to further improve the contour control effect. Finally, the stability and convergence of the closed-loop system are rigorously proven, and comparative experiments are conducted on a DLMDGS platform to demonstrate the superiority of the proposed control strategy. [ABSTRACT FROM AUTHOR]

The safe and efficient power battery thermal management system (BTMS) is a prerequisite for the effectiveness and long service life of electric vehicles. So, a BTMS with inserted multi-layer phase change materials (PCMs) is proposed to enhance the safety and working performance of battery pack. Effects of PCM settings and operating conditions on the thermal performance of battery pack are discussed and analyzed. The results reveal that PCM cooling plays a significant role in the thermal management of battery pack, where the maximum temperature value and temperature difference of BTMS with multi-layer PCM #C are respectively reduced by 13.61 °C and 2.54 °C compared to battery pack without PCM. Besides, the coupling effects of multiple factors, that is, PCM permutation, the thickness and height of PCMs, and ambient temperature, on the heat dissipation of battery pack are discussed via orthogonal results analysis. The optimized multi-layer PCMs are obtained for the BTMS, i.e., P s = 121, h 1 = 5 mm and L = 6 mm, which achieves the lowest values of T max = 43.02 °C and Δ T = 3.37 °C at T amb = 20 °C. It provides insights for optimizing thermal control strategies for the advancement of thermal management in electric vehicles, ultimately enhancing safety, performance, and longevity. • A battery thermal management system with multi-layer phase change materials is proposed. • Multifactorial effects of phase change materials on the thermal performance are discussed. • Orthogonal results analysis is employed to gain the optimized thermal management systemt setting. • Thermal performance of battery pack is strongly improved. [ABSTRACT FROM AUTHOR]

Cognitive deficits are core symptoms of schizophrenia (SZ) and are associated with impaired resilience to stress. Different cognitive functions appeared to be interrelated, and the mechanism may involve neural alterations. The disrupted topological organization indicated abnormalities in the segregation and integration of brain networks that support various cognitive processes in SZ patients. Therefore, this study aimed to assess the direct and indirect effects of resilience on cognitive functions. We hypothesized that topological properties would moderate these associations. Forty-nine SZ patients and fifty-two healthy controls (HCs) were recruited in this study. The Connor-Davidson Resilience Scale and the MATRICS Consensus Cognitive Battery were used to examine resilience and cognitive functions, respectively, and a graph theory approach was used to assess white matter topological organization. Compared to HCs, SZ patients showed lower levels of resilience and cognitive functions in multiple domains as well as abnormal global properties and nodal metrics. In addition, shorter characteristic path length was associated with a stronger indirect effect of resilience on working memory through processing speed in SZ patients. Characteristic path length might moderate the mediating effects of processing speed in the relationship between resilience and working memory in schizophrenia patients. • Schizophrenia patients showed deficits in resilience and cognitive domains. • Graph theoretical approach was used to assess white matter network metrics. • L p moderated the mediating effects of processing speed in relationship between resilience and working memory in SZ. [ABSTRACT FROM AUTHOR]

In this study, nonlinear motion characteristics have been studied in the coupled behavior of a Tension Leg Platform (TLP) combined with a Tender-assisted Drilling Unit (TADU). A time-domain numerical model has been established that accounts for the nonlinear behavior of mooring systems and hydrodynamic interference. Experiments are performed to verify the numerical model. Nonlinear motion characteristics of the steady-state response of the time-domain results are analyzed using Poincaré mapping and fast Fourier transform. The focus of this study is on investigating the motion response of the TLP platform in three degrees of freedom under coupled states. The surge motion is found to mainly consist of the wave frequency component and the half-wave frequency subharmonic component, while the wave-frequency, subharmonic, and super harmonic vibration components are observed in both heave and pitch motions. Three types of nonlinear regimes, namely chaos, transition, and multiple periodic, are identified in the heave and pitch motions under different wave conditions. • The dynamic responses of the TLP in a TLP-TADU coupled system are investigated using both numerical and experimental methods • Multiple periodic motions with two periods are captured in surge. • The wave-frequency, subharmonic, and super harmonic vibration components are found in heave and pitch. • The nonlinear behavior of the coupled TLP under various wave conditions are summarized. [ABSTRACT FROM AUTHOR]

A numerical model for computing the complex nonlinear dynamics and fatigue damage of steel catenary riser (SCR) system is proposed in this paper. The structural model of SCR is described by the absolute nodal coordinate formulation (ANCF), which is further coupled with Morrison equation to incorporate the hydrodynamic loads. The hysteretic riser-soil interaction model and Coulomb friction 'bilinear' model are applied to simulate the seabed reactions. After validation, the distributions of nonlinear motions along the SCR, the response characteristics of touchdown point (TDP) and the corresponding stress and fatigue are fully discussed. It is found that the motion trajectory in x - z plane presents various regimes along the SCR, relating to the phase difference between x - and z -motions induced by the variations of primary and harmonic frequencies. The secondary uplift of z -motion, accompanying by the sharp decline of vertical seabed force, is captured for TDP. The values of secondary uplift and seabed force decline increase or decrease with growing surge amplitude or period in step style. Both the amplitude and period of top-end surge affect the features of axial tension, bending moment, stress and fatigue damage, where the former plays a more significant role in the concerned parameter range. • A numerical model for computing the complex nonlinear dynamics and fatigue damage of SCR system is proposed. • Diverse regimes are identified for the motion trajectories at different positions along the SCR excited by top-end surge. • The secondary uplift of z -motion near maximum penetration and the induced decline of seabed force are captured for TDP. • The increase of A e and decrease of T e intensify the overall level of stress and fatigue along the SCR with falling rates. [ABSTRACT FROM AUTHOR]

In this paper, the changes in rheological behaviour, emulsion stability, and gel properties of oil-in-water (O/W) emulsions with different safflower oil phase fractions (0.4–0.7) and magnetic field-modified soy 11S globulin (MF-11S, 1%–5%) were studied. The emulsions prepared with low (0.4–0.5) and high (≥0.7) oil phase fractions showed obvious delamination in a short time, while those prepared with medium oil phase fractions (0.6–0.65) and 3%–5% MF-11S formed solid-like emulsion gel. The apparent viscosity, storage stability, gel puncture force, and L* value of the emulsion significantly increased (P < 0.05) with the increase in oil fraction. Moreover, the droplet size significantly decreased (P < 0.05), and the emulsion viscosity, storage stability, and b* value significantly increased (P < 0.05) with the increase in MF-11S from 3% to 5%. Overall, the O/W emulsion prepared with the 5% MF-11S and 0.65 safflower oil phase fraction had the best storage stability and rheological properties. [Display omitted] • Safflower oil and modified soy 11S globulin can prepared solid-like O/W emulsion. • Increasing oil fraction increased the apparent viscosity, storage stability, puncture force. • Emulsion viscosity, storage stability, and b* increased with increasing 11S globulin. • The best O/W emulsion was formed with 0.65 safflower oil fraction and 5% 11S globulin. [ABSTRACT FROM AUTHOR]

This study aimed to identify neural biomarkers for schizophrenia (SZ) and bipolar disorder (BP) by analyzing multimodal neuroimaging. Utilizing data from structural magnetic resonance imaging (sMRI), diffusion tensor imaging (DTI), and resting-state functional magnetic resonance imaging (rs-fMRI), multiclass classification models were created for SZ, BP, and healthy controls (HC). A total of 113 participants (BP: 31, SZ: 39, and HC: 43) were recruited under strict enrollment control, from which 272, 200, and 1875 features were extracted from sMRI, DTI, and rs-fMRI data, respectively. A support vector machine (SVM) with recursive feature elimination (RFE) was employed to build the models using a one-against-one approach and leave-one-out cross-validation, achieving a classification accuracy of 70.8%. The most discriminative features were primarily from rs-fMRI, along with significant findings in sMRI and DTI. Key biomarkers identified included the increased thickness of the left cuneus cortex and decreased regional functional connectivity strength (rFCS) in the left supramarginal gyrus as shared indicators for BP and SZ. Additionally, decreased fractional anisotropy in the left superior fronto-occipital fasciculus was suggested as specific to BP, while decreased rFCS in the left inferior parietal area might serve as a specific biomarker for SZ. These findings underscore the potential of multimodal neuroimaging in distinguishing between BP and SZ and contribute to the understanding of their neural underpinnings. [ABSTRACT FROM AUTHOR]

In order to research the potential of replacing sodium chloride to sodium bicarbonate, the physico-chemical and Raman spectroscopy of chicken batters with sodium chloride alone (1%) or sodium bicarbonate alone (0.5%) were studied. The pH, b ∗ value, cooking yield and textural properties were significantly (p < 0.05) increased in the batter with sodium bicarbonate. The batter with sodium chloride showed three distinct phases during the rheological measurement, but the batter containing sodium bicarbonate has two distinct phases, and has higher storage and loss modulus values at 72 °C. The frequency of admin I was a slight shift from 1659 ± 0.58 cm −1 to 1661 ± 0.58 cm −1 when added sodium bicarbonate alone, that resulted in an increase of β-sheet, β-turn and random coil content accompanied by a decrease of α-helices content. It was increased the hydrophobic interactions and ration of I 850 /I 830 , which caused by protein unfolding and exposure of aliphatic residues. From the above, it was concluded that sodium bicarbonate can be utilized to reduce the sodium chloride of chicken batter. [ABSTRACT FROM AUTHOR]

To simulate the fluctuating lift and resistance of the cylinder in vortex-induced vibration (VIV) accurately, the shear-stress transport (SST) turbulence model is modified in this paper. Then the correctness of the modified model is verified in the flow around a circular cylinder. After that, the numerical simulation of vortex-induced vibration of a cylinder with two degrees of freedom is carried out by using the embedded program of OpenFoam under three different initial conditions which are uniform acceleration, uniform deceleration and uniform velocity respectively. After the comparison and analyses of the vibration amplitude, frequency, fluid force, motion locus and vortex shedding, we find that there are some differences in the results obtained under three initial conditions. By contrast, the results of uniform acceleration condition are more accurate. Besides, the hysteresis mechanism can be analysed on the basis of the vortex shedding characteristics of uniform acceleration and deceleration. In general, the initial condition has a great influence on the numerical simulation of the vortex-induced vibration, and the validity of the modified turbulence model is further verified in the simulation. [ABSTRACT FROM AUTHOR]

Inadequate remnant volume and regenerative ability of the liver pose life-threatening risks to patients after partial liver transplantation (PLT) or partial hepatectomy (PHx), while few clinical treatments focus on safely accelerating regeneration. Recently, we discovered that supplementing 5-aminolevulinate (5-ALA) improves liver cold adaptation and functional recovery, leading us to uncover a correlation between 5-ALA metabolic activities and post-PLT recovery. In a mouse 2/3 PHx model, 5-ALA supplements enhanced liver regeneration, promoting infiltration and polarization of anti-inflammatory macrophages via P53 signaling. Intriguingly, chemokine receptor CX3CR1 functions to counterbalance these effects. Genetic ablation or pharmacological inhibition of CX3CR1 (AZD8797; phase II trial candidate) augmented the macrophagic production of insulin-like growth factor 1 (IGF-1) and subsequent hepatocyte growth factor (HGF) production by hepatic stellate cells. Thus, short-term treatments with both 5-ALA and AZD8797 demonstrated pro-regeneration outcomes superior to 5-ALA-only treatments in mice after PHx. Overall, our findings may inspire safe and effective strategies to better treat PLT and PHx patients. [Display omitted] • The synthesis and level of 5-aminolevulinate (5-ALA) promote liver regeneration • 5-ALA affects macrophagic P53 and CX3CR1 functions after partial hepatectomy (PHx) • CX3CR1 deficiency elevates hepatocellular proliferation via IGF-1 signaling in PHx • 5-ALA and CX3CR1 antagonists together may aid in PHx or split-liver transplantation Failure in timely liver regeneration and functional recovery threatens the life of patients after partial hepatectomy (PHx) or liver transplantation (PLT). Chen et al. report a 5-aminolevulinate-macrophagic P53/CX3CR1-IGF-1 functional axis that can be targeted to promote liver regeneration without interrupting the normal liver zonation following PHx or PLT. [ABSTRACT FROM AUTHOR]

At present, most research achievements are about the response of two or three degrees of freedom vortex induced vibration. Responses of vortex induced motions (VIM) of marine structures with 6-DOF remain to be further studied. In this paper, a model test of a tethered cylinder in uniform flow was carried out. The 6-DOF motion responses with different mass ratios were measured and the motion trajectories, amplitudes and frequencies were investigated. Results show that, the vibration amplitude of the cylinder increases with the reduced velocity at first, and then remain relatively stable. In the “lock in” range, the cross-flow vibration frequency increases with the reduced velocity, and the in-flow vibration frequency increases in a ladder type. Yaw motion was also observed in this experiment, and a strong correlation between yaw motion and cross-flow vibration was found. In the initial branch, yaw motion has only one dominant frequency, while in the “lock in” range, yaw motion appears to have two dominant frequencies, the major frequency is equal to the cross-flow vibration frequency and the minor frequency is half of the transverse vibration frequency. It is also found that in the range of mass ratio applied in this paper ( 0.272 < m * < 0.431 ), the cross-flow vibration amplitude decreases and the yaw amplitude increases with the increase of the cylinder's mass ratio. [ABSTRACT FROM AUTHOR]

The model test method of the FPSO and offloading system is investigated by using the development mode of “FPSO + CALM + TANKER” working in a 1700-m depth of offshore West Africa. An equivalent design based on static and dynamic similarity criteria for oil offloading line (OOL) is discussed, and a type of creative method for the equivalent design of OOL in a model test is proposed. Based on the static similarity criterion, the truncated design of the FPSO mooring system in water depth and horizontal directions is carried out. After that, a relevant static optimization is conducted. Meanwhile, to avoid interference between the FPSO mooring system and CALM mooring system, a horizontal equivalent design for the CALM mooring system is provided. On this basis, the model test scheme is conducted. Time domain coupled analyses for the whole system before and after truncation are later performed. After comparison, it is observed that the calculated results of the truncated system are basically consistent with those of the prototype system, and the design of the model test scheme is demonstrated to be robust and reliable. [ABSTRACT FROM AUTHOR]

This paper presents an experimental investigation on 6-DOF vortex-induced motion response of a tethered buoyancy can under conditions of different tether lengths. The buoyancy can was mounted vertically, with the diameter of 150 mm and the length of 700 mm. The responses of trajectory, amplitude, frequency and other parameters were analyzed in detail under conditions of different tether lengths and height above the water. In addition, during the experiment, obvious yaw motion is observed and the yaw characteristics were investigated. The results show that when the reduced velocity is small (less than about 3.5), the motion amplitude is small and irregular and when the reduced velocity is large (3.5< U r < 15), the in-line vibration frequency is two times the transverse vibration frequency and the trajectory of the cylinder is in “figure 8” shape. A strong connection between the yaw motion frequency and the vibration frequency was also found. Moreover, the mean drag coefficient of the buoyancy can was measured and the amplification effect of VIV on drag coefficient was observed. [ABSTRACT FROM AUTHOR]

According to Jauvtis and Williamson's experiment, when the mass ratio is 2.6, the maximum transverse amplitude of the cylinder reaches 1.5 D in the super-upper branch. Many researchers have tried to capture the maximum transverse amplitude in numerical simulation. However, according to the existing references, few of the numerical results can reach such amplitude and the maximum vibration amplitudes are obviously smaller than the experimental values. In order to get more accurate results, a modified SST turbulence model is applied for the numerical simulations based on OpenFOAM. The influence of the magnitude of inflow acceleration in numerical simulation is also investigated. Firstly, the performance of modified SST model is tested by example of flow around a circular cylinder. Secondly, the appropriate inflow acceleration magnitude is determined by analyzing the numerical response under different acceleration magnitudes, finding that the inflow acceleration must be less than 0.017 per normalization time in order to capture the maximum transverse amplitude. Then, the two degrees of freedom vortex induced vibration of a cylinder with a mass ratio of 2.6 and reduced velocity from 2 to 14 is simulated. The numerical results are compared in detail with the experimental data and the maximum transverse amplitude, mutations of phase angle between lift force and displacement, the characteristics and change trends of the trajectory as well as the “2T” vortex model are captured clearly. The results show that the maximum transverse amplitude can be captured more accurately with modified SST turbulence model and appropriate inflow acceleration value. [ABSTRACT FROM AUTHOR]

In this work, the differences in macrostructure and microstructure, rheology, and storage stability of pre-emulsified safflower oil (PSO) prepared by natural and magnetic field modified soy 11S globulin were analysised. It was concluded that the PSO with magnetic field modified soy 11S globulin (MPSO) has better emulsifying activity and physical stability. The changes in gel quality, oxidational sensitivity, rheological, and sensory properties of pork batters with different substitute ratios (0%, 25%, 50%, 75%, and 100%) of pork back-fat by MPSO with magnetic field modified soy 11S globulin were studied. Compared to the sample without MPSO, pork batter with MPSO showed higher emulsion stability, apparent viscosity, L ⁎ value, springiness, cohesiveness, and expressible moisture, while lower a ⁎ value and cooking loss. Moreover, added MPSO could be more uniformly distributed into the meat matrix with smaller holes. With the increase in the replacement proportion of pork back-fat, the hardness, water- and fat-holding capacity, and P 21 of pork batter significantly decreased (P < 0.05). As revealed by sensory evaluation and TBARS, using MPSO to substitute for pork back-fat decreased the lipid oxidational sensitivity of pork batter, and without negative effects on the appearance, juiciness and overall acceptability. Overall, it is feasible to apply MPSO as a pork-fat replacer to produce reduced-animal fat pork batter with excellent gel and sensory properties. [Display omitted] • Adding pre-emulsified safflower oil (PSO) improved technical and sensory properties. • Adding PSO formed more uniform dispersion with massive smaller size droplets. • PSO increased the apparent viscosity and lowered TBARS of the raw pork batter. • It is feasible to apply PSO as fat replacer to produce batter with good quality. [ABSTRACT FROM AUTHOR]

To explore the potential of using sodium bicarbonate to take the place of sodium chloride, the changes in endogenous fluorescence, ultraviolet absorption spectrum, water holding capacity, gel properties and water distribution of pork myofibrillar protein were investigated. Because of the increase in pH and the exposure of more tryptophan and tyrosine residues with increasing sodium bicarbonate, the cooking yield and gel strength of pork myofibrillar protein significantly increased (P < 0.05), and centrifugal loss significantly decreased (P < 0.05). Meanwhile, the colour of the cooked pork myofibrillar protein was darker with increasing sodium bicarbonate, the bound water and immobile water were bound more tightly to the protein matrix, and the mobility of the water was lower, except for in the sample with 0.4 % sodium bicarbonate. Moreover, free water significantly increased (P < 0.05) when 0.4 % sodium bicarbonate was added, indicating that the mobility of the water was enhanced. Overall, the use of sodium bicarbonate could induce the protein conformation change, and improve the bond water content and texture properties of reduced-salt pork myofibrillar protein. [ABSTRACT FROM AUTHOR]

During the drilling operation of a Spar platform with a tender semisubmersible platform, the motion of the floating platforms is complex and quite different from that of the separate conditions due to the influence of multibody hydrodynamics and the connecting system. This can lead to potential collision accidents. In this paper, the motion characteristics of a tender assistant drilling (TAD) system under drilling scenarios are analyzed numerically and experimentally. Based on three-dimensional potential flow theory, the numerical model of a multiple floating body system is established to obtain the hydrodynamic parameters, the first-order wave force, and the mean drift force, and then a time domain analysis is conducted. Both single-body and coupled multibody conditions are observed to analyze the motion performance of the gangway and the tension response of the connecting lines. The results show that the Spar platform affects the low-frequency motion of the semisubmersible platform more intensely when the platforms work side by side without hawser lines. The phenomenon of hydrodynamic interaction is weakened under fully coupled conditions due to this connection. In addition, the stroke of the gangway is positively related to the relative motion, which reflects the relative motion response of the platforms. • The surge-pitch coupled motion characteristics of the Spar platform and its effect on TDU are observed in detail. • The motion response of the two platforms with and without connection is discussed. • Response of hawser lines and the gangway is analyzed to study the relative motion. [ABSTRACT FROM AUTHOR]

The leakage of Liquefied Natural Gas (LNG) is susceptible to chain accidents such as fire and explosion, threating the safety of LNG vessels. This paper proposes a risk management framework for LNG offshore transfer and delivery system, which is a critical assembly of LNG offshore operation. The components and the workflow of the system are addressed. Failure mode and effects analysis (FMEA) is implemented to identify potential failure modes, failure causes and final effects of the system in the accident of leakage. According to the risk identification results, typical failure scenarios are established to explore the impact of different factors, including environmental parameters and the layout of ships. Computational Fluid Dynamics (CFD) method is introduced to solve the model, achieving the characteristics of the LNG vapor leakage risk. Based on the leakage risk assessment, the optimized risk control options (RCOs) are determined. The results indicate that the proposed framework can be applied to analyze different risk scenarios and propose controls to improve the security of the system. • A risk management framework is proposed for leakage risk analysis of LNG offshore transfer and delivery system. • Based on the FMEA method, the potential failure modes and failure causes of the system are identified and analyzed. • CFD simulation is performed to investigate the impact of different operating environment conditions on risk of LNG leakage. • The risk control opinions (RCOs) of the system and related equipment are provided. [ABSTRACT FROM AUTHOR]

This paper presents the results of two-DOF VIV experiments on horizontal cylinders with lengths of 120 cmand diameters of 5 cm, 11 cm and 20 cm under conditions of different in-line and transverse natural frequencies. By comparative analysis of vibration trajectories, it has been found that the oscillation frequencies of cylinders in in-line and cross-flow directions with different scales all appeared to have more than one dominant frequency at some stages, That is, the in-line dominant frequency was equal to one to three times the cross-flow one under conditions of certain scales, natural frequencies and reduced velocities. Additionally, more than one dominant frequency was also observed in transverse oscillation, so the trajectories of cylinders were significantly different from the traditional “figure 8” shape. Particularly for small cylinders, the change in the vibration trajectory was the most obvious. Studying the evolution of the cylinder VIV trajectories at various scales and different conditions revealed that the appearance of various forms of cylinder vortex vibration trajectories was mainly due to the scale of the cylinder, the transverse and in-line natural frequencies, the frequency ratio and the mass ratio. [ABSTRACT FROM AUTHOR]

The top-end dynamic boundary of riser is usually generated by the motion of the moored floating body in marine environment, inducing the oscillation of equivalent fluid velocity and mechanical features of the riser, and further affecting its vortex-induced vibration (VIV). In this paper, the double-degree-of-freedom (2DOF) top-end dynamic boundary with a trajectory of "8", which widely exists in fluid-structure interactions of ocean engineering, is studied. A series of tests for a riser model with the aspect ratio of 250 are conducted under the combination of the top-end dynamic boundary and uniform flow, whose three-dimensional (3D) VIV characteristics and behaviors are investigated in detail. The effect of amplitude and frequency of "8"-shape dynamic boundary on VIV is discussed, following which the relationship and difference among four top-end boundaries of "8"-shape, in-line harmonic, cross-flow harmonic and static forms are compared and analyzed. The results indicate that some periodically oscillatory phenomena involving time-varying frequency, mode transition and amplitude modulation are induced by the "8"-shape dynamic boundary. The periodic effect of dynamic boundary on VIV shows orthogonality, which means the cross-flow dynamic boundary is mainly responsible to the oscillatory characteristics in in-line VIV while the in-line dynamic boundary corresponds to cross-flow VIV. At the same time, the in-line dynamic boundary has a certain disturbance on the in-line vibration. The amplitude and frequency responses of in-line VIV could be enhanced by "8"-shape dynamic boundary at low or medium reduced velocity, further growing with the increase of boundary amplitude and frequency. • The VIV of a flexible model under "8"-shape top-end boundary and uniform flow is investigated experimentally. • The "8"-shape boundary induces oscillatory VIV phenomena, together with periodic jumping of vibration mode to higher level. • The oscillatory features of VIV could be enhanced by the increasing amplitude or frequency of "8"-shape top-end boundary. • The periodic effect of "8"-shape boundary on 3D VIV reflects certain orthogonality at medium-low flow velocity. [ABSTRACT FROM AUTHOR]

[Display omitted] • Ultrasound-assisted NaHCO 3 increased pH, SSP, cooking yield of reduced-salt batter. • Ultrasound-assisted NaHCO 3 improved the texture and microstructure of batters. • The mobility of water was reduced after treated with ultrasound-assisted NaHCO 3. • Ultrasound-assisted NaHCO 3 enabled reduced-salt batters to have good gel properties. To study the potential usefulness of ultrasound (0, 30, and 60 min) and sodium bicarbonate (0 % and 0.2 %) combination on the reduced-salt pork batters, the changes in water holding capacity, gel properties, and microstructure were investigated. The pH, salt-soluble proteins solubility, cooking yield, and b* values of reduced-salt pork batters significantly increased (P < 0.05) with the increase in ultrasound time and the addition of sodium bicarbonate, leading to the hardness, springiness, cohesiveness, and chewiness significantly increased (P < 0.05). Furthermore, the use of ultrasound-assisted sodium bicarbonate treatment caused the reduced-salt pork batters to form a typical spongy structure with more evenly cavities. Due to the initial relaxation time of T 21 and T 22 were shorter, and the peak ratio of P 21 was increased and P 22 was decreased after ultrasound-assisted sodium bicarbonate treatment, implying that the mobility of water was reduced. Thus, the use of ultrasound-assisted sodium bicarbonate treatment enabled reduced-salt pork batters to have better gel characteristics and higher cooking yield. [ABSTRACT FROM AUTHOR]

This paper mainly focuses on J lay of Steel Catenary Riser, and proposes a new model using Sectional Mechanics Model, by iterating and composing catenary method and large deflection method. First the initial deformation and reaction force are evaluated by simple catenary model. For the pipe section with large deformation, asymptotic expansion in singular perturbation techniques pursues the solutions of second-order nonlinear governing equation. Comparison between these three methods shows that the new model displays very close results with high-accuracy large deflection model. This new model is also performed to evaluate the sensitivity of top tension, wet weight, and stiffness on the riser. [ABSTRACT FROM AUTHOR]

• AE could monitor the transition of mechanical mechanism of GFRP–UHPC hybrid beams. • AE signals with high peak frequencies could reflect the plastic deformation of HSBs. • The intensive degrees of b-value points in distinct loading stages are different. • AE intensity analysis could quantitatively assess the damage degree of the specimen. The failure of glass fiber reinforced polymers (GFRP)–ultra-high performance concrete (UHPC) hybrid beams originate from its mechanical mechanism transition, which is reflected in the plastic deformation of its components. The plastic deformation could be sensitively detected using acoustic emission (AE) technique. In this study, AE technique was utilized to monitor the mechanical mechanism transition of the GFRP–UHPC hybrid beam through the push-out test of a bolted shear connection specimen. Results showed that AE parameters could reflect the damage transition of the push-out specimen from qualitative and quantitative perspectives. First, the variation characteristics of AE hits, energy, and ringing counts were remarkably discernible in the three loading stages of the specimen. And the plastic deformation of high-strength bolts could be identified by the increase in AE signals with high peak frequencies. Besides, the mechanical mechanism transition of the specimen could be distinguished by the intensive degrees transition of b-value points in the different loading stages. Finally, the boundary values of the historic index [ H (t) ] and severity (S r) were proposed to quantitatively evaluate the damage degree of the specimen. AE technique provides a possibility of safety warning for the GFRP–UHPC hybrid beams because of its ability to effectively identify the mechanical mechanism transition. [ABSTRACT FROM AUTHOR]

Abstract: In this work, we present an easy approach to prepare zirconium carbide (ZrC) nanofibers by electrospinning technique. Polyzirconoxane (PZO) is used as the zirconium source. Polyacrylonitrile (PAN) is used as the spinning aid and primary carbon source while sucrose is used as the additional carbon source. The as-spun green fibers are converted to ZrC nanofibers after carbothermal reduction at 1400°C. Core–shell structured nanofibers are obtained when using PAN only as the carbon source, while more homogeneous nanofibers which are composed of uniformly nano-sized ZrC crystals are obtained when using PAN and sucrose as the carbon source. The carbon source has a strong influence on the fiber morphology by affecting the kinetics of the carbothermal reduction reaction. The obtained ZrC fibers are characterized by XRD, SEM and TEM. [Copyright &y& Elsevier]

Abstract: Chopping and beating processes were used as meat-cutting methods in preparing kung-wan to produce low-salt products while retaining or improving the emulsion stability, sensory evaluation, and physico-chemical properties of the standard high-salt formulation. Increased salt content improved emulsion stability and dynamic rheology. However, 3% salt content decreased the overall acceptance of kung-wan. Compared with the chopping process, beating resulted in higher emulsion stability, overall acceptance, and β-sheet content (P<0.05). Additionally, the beating process formed more compact and continuous structures at the same salt content. Kung-wan produced by beating with 1% and 2% salt had similar emulsion stabilities, sensory evaluation, and secondary structures (P>0.05). Therefore, this process allows reduction of salt content, suggesting that the kung-wan produced in this manner is healthier and has better texture. [Copyright &y& Elsevier]

Abstract: Mesoporous graphene with three dimensional structure (3dGR) is prepared by a modified Hummers method and a simple solvent treatment. The solvent-treated graphene nanosheets show wrinkled structure and agglomerate to form the mesoporous structure. The pore size distribution of 3dGR based on density functional theory (DFT) shows the pore size ranging from 2.3–40nm. 3dGR shows excellent electrochemical behaviors in both aqueous and organic electrolytes, even though it has fairly small surface area of only 81.7m2/g. For 3dGR, a capacitance of 341F/g and energy density of 16.2Wh/kg are acquired in alkali electrolyte, while those values are 166F/g and 52.5Wh/kg respectively in organic electrolyte. In addition, because of the high packing density of 3dGR, higher volumetric power densities of 20.7 and 67.2Wh/L in alkali and organic electrolytes are obtained. After 1000 cycles of galvanostatic charge/discharge tests, over 96% and 86% of the original capacitance can be retained in alkaline and organic electrolytes. [Copyright &y& Elsevier]

Abstract: Two different meat-cutting methods were used to prepare kung-wans in an attempt to produce low-salt products while retaining the same, or improved, textural and physicochemical properties of the standard high-salt formulation. The level of salt and the processing method significantly affected color, cooking yield, texture and changes in the secondary structures of proteins. Improved salt levels resulted in firmer texture. At the same salt levels, compared with chopping, the beating method resulted in higher L⁎-values, improved cooking yields and changes in the β-sheet content of the proteins, which resulted in an improved product with better texture. Using the beating process, the kung-wans prepared with 1% and 2% salt had similar L⁎-values, cooking yield and texture, and were better than those prepared by chopping with 2% salt. Overall, the beating process enabled lowering of the salt content, making the kung-wans more hard, brittle and elastic. [Copyright &y& Elsevier]

Highlights: [•] ZrB2 nanofibers are prepared by electrospinning via carbothermal reduction. [•] The obtained ZrB2 nanofibers are consist of nano-sized ZrB2 single crystals. [•] The obtained ZrB2 is nearly stoichiometric. [ABSTRACT FROM AUTHOR]

The effects of different homogenization pressure levels on the solubility, particle size, surface hydrophobicity, free sulfhydryl content, surface tension, water distribution and mobility, rheological, foaming and gel properties of soy 11S globulin were investigated in this study. High-pressure homogenization treatment (50–150 MPa) significantly increased the magnitude of protein zeta potential, solubility, while reduced the particle size, which increased surface hydrophobicity, and exposure to free sulfhydryl and disulfide bonds, as well as surface tension, foaming capacity and stability, elasticity index, macroviscosity index, initial apparent viscosity and shear stress. On the other hand, excessive pressure treatment at 150 MPa caused solubility, surface hydrophobicity, exposure to free sulfhydryl, the elasticity index, macroviscosity index, initial apparent viscosity and shear stress to decrease. The gel strength and water immobilization also increased, whereas the mobility of the water was low. Overall, our results show that high-pressure homogenization improves the physicochemical, foaming and gel properties of 11S globulin. [Display omitted] • HPH decreased particle size, increased foaming capacity and stability, initial apparent viscosity and shear stress. • HPH exposed more surface hydrophobicity, free sulfhydryl and disulfide bonds. • Over 150 MPa, solubility, surface hydrophobicity, free sulfhydryl were lowered. • HPH could improve the physicochemical, foaming and gel properties. [ABSTRACT FROM AUTHOR]

Abstract: The paper reports the results of experiments on the vortex-induced vibration of a horizontal cylinder with two degrees of freedom and with the diameter of 5cm, and length of 120cm. It has been found that the vibration of the cylinder in in-line direction appeared to be “multi-frequency”. That is, under certain combinations of natural vibration frequency and reduced velocity, the in-line vibration frequency contained both the cross-flow vibration frequency and two times the cross-flow vibration frequency. Consequently, the trajectories of the cylinder were “egg” and “raindrop” shapes, which were significantly different from the traditional figure “8” and “new moon” shapes. In addition, the study found that the vibration trajectory in other forms moves towards a figure “8” shape as xxx increases. Also, it was found that the various forms of cylinder vortex vibration trajectories depended primarily on the combination of natural vibration frequency and reduced velocity. [Copyright &y& Elsevier]

Abstract: Altered brain connectivity has been widely considered as a genetic risk mechanism for schizophrenia. Of the many susceptibility genes identified so far, ZNF804A (rs1344706) is the first common genetic variant associated with schizophrenia on a genome-wide level. Previous fMRI studies have found that carriers of rs1344706 exhibit altered functional connectivity. However, the relationship between ZNF804A and white matter structural connectivity in patients of schizophrenia remains unknown. In this study, 100 patients with schizophrenia and 69 healthy controls were genotyped at the single nucleotide polymorphism rs1344706. Diffusion tensor imaging (DTI) was conducted and analyzed with tract-based spatial statistics. Systematic statistical analysis was conducted on multiple diffusion indices, including fractional anisotropy, axial diffusivity, radial diffusivity, and mean diffusivity. Unpaired two-sample t-test revealed significant differences in fractional anisotropy and diffusivity between schizophrenia and control groups. A two-way ANOVA analysis was conducted to assess the main effects of and the interaction between schizophrenia and ZNF804A. Although significant main effects of the diagnosis of schizophrenia were found on radial diffusivity, no association between the ZNF804A (rs1344706) and white matter connectivity was found in the entire group of subjects or in a selected subgroup of age-matched subjects (n =72). [Copyright &y& Elsevier]

Abstract: Objective: To assess the association of Hemoglobin A1C (HbA1c) with acute brainstem infarctions (BSIs) and to determine whether HbA1c is an independent risk factor in BSIs patients. Methods: 96 only BSIs patients were categorized into four groups according to HbA1c as <6%, ≥6% but <7%, ≥7% but <8%, or≥8%, respectively. The association of the four HbA1c groups with diffusion-weighted imaging (DWI) infarct volumes (DIV), National Institutes of Health Stroke Scale (NIHSS), and follow-up modified Rankin Scale (FmRS) scores were analyzed. Patients also were categorized into two groups according to HbA1c<6% or ≥6%. Logistic regression analyses were performed to determine independent risk factors. Results: There was a significant correlation between HbA1c and DIV (Spearman ρ=0.339, P=0.001), NIHSS scores (ρ=0.292, P=0.004) and FmRS scores (ρ=0.315, P=0.002). The incidence of pons infarction was highest in BSIs and patients with HbA1c≥6% showed significantly more frequent isolated pontine infarction. Logistic regression analyses showed that only HbA1c was independently associated with larger DIV (P=0.025) and FmRS scores (P=0.026). Conclusions: These results suggest that elevated HbA1c level may be a potential serologic marker in the evaluation of the severity and prognosis of acute BSIs. There is an urgent need to study control of diabetes mellitus (DM) before and after BSIs. [Copyright &y& Elsevier]

Abstract: Background: ZNF804A gene polymorphism rs1344706, the first genetic risk variant to achieve genome wide significance for schizophrenia, has been linked to neural functional connectivity. Dysconnectivity of WM may be the primary pathological mechanism of schizophrenia. Association of this variant with regional WM density has not been investigated in schizophrenic patients. Methods: 69 healthy controls and 80 patients with schizophrenia underwent genotyping of rs1344706 SNPs, and were examined for WM density (T1-weighted MRI). The association of rs1344706 with WM changes in schizophrenia patients and healthy controls was analyzed using a full-factorial 2×2 analysis of variance. Results: 1. There was an interaction on WM density in the left prefrontal lobe between the rs1344706 genotype and schizophrenic diagnosis, where the risk T allele carriers presented higher WM density in the schizophrenia patients and lower WM density in healthy controls in comparison with the non-risk allele carriers. 2. The risk allele was associated with an increased WM density of the bilateral hippocampus in both the patients and the healthy group. Limitation: The influence of antipsychotics to the white matter in schizophrenic patients was not fully eliminated. Conclusions: The ZNF804A variant may confer risk for schizophrenia by exerting its effects on the WM in the left prefrontal lobe together with other risk factors for schizophrenia. [Copyright &y& Elsevier]

Joule heating caused by electric currents is a major problem in scale-up electrochromatography. Here, to predict the temperature effects of lateral electric field electrochromatography and the process conditions required, a mathematical heat transfer model was established, which took into account the physical characteristics, including the electrical conductivity, of the porous medium and the ceramic plate in the gel chamber. The temperatures calculated using this model were within 4 °C of the experimentally measured results. For the lateral enlargement simulation of short columns (4 cm), it was found that when the width was enlarged to > 3 cm, the outlet temperature on the center line did not increase with increasing width. The electric field strength of 1700 V/m was maintained by increasing current strength according to the column size; further, when the gel chamber was enlarged to 0.075 × 0.075 × 0.1 m3, its internal temperature can be controlled within 16 °C under certain operating conditions, and an electric field strength of 1700 V/m can be obtained in the gel chamber. • Electrochromatography in a transverse electric field was mathematically modelled. • Use of a transverse electric field leads to less Joule heating than an axial field. • Scale-up electrochromatography was successfully performed using the model. [ABSTRACT FROM AUTHOR]

• The method aims at the health monitoring of post-tensioned hollow slabs by waveguide technology. • The method utilizes two sensors to offer a cost-effective alternative for damage localization. • The proposed method is suitable for long-term online monitoring of actual operating bridges. Prestressing tendons are crucial load-bearing elements in post-tensioned hollow slab bridges. Damage to these tendons significantly reduces the safety, functionality, and longevity of the bridge. Regular monitoring of prestressing tendons is essential for bridge operation. Acoustic emission technology, known for its high accuracy and sensitivity to minor vibrations, is a key technique for monitoring bridge cables. This study proposes a novel dual-sensor acoustic emission localization method for detecting tendon damage in post-tensioned hollow slab bridges, utilizing waveguide technology. The effectiveness of this method is confirmed through hammering tests that simulate acoustic emission damage on operational hollow slab bridges. The proposed method, requiring only two sensors, offers a cost-effective alternative for monitoring the entire span of post-tensioned hollow slab bridges, so that effectively reduces the cost of bridge health monitoring and is easy to be promoted in actual engineering projects. [ABSTRACT FROM AUTHOR]

This paper studies the effects of soy protein isolate (SPI; 0, 2% and 4%; Weight/Weight) on texture, rheological property, sulfhydryl groups, and the water distribution state of low-salt (1% NaCl) pork myofibrillar protein systems under high pressure processing (HPP, 200 MPa, 10 min). The L ⁎ value, cooking yield, hardness, total and reactive sulfhydryl, surface hydrophobicity, and the G' value at 80 °C of pork myofibrillar protein increased significantly (P < 0.05) when SPI was added; however, the springiness, cohesiveness, and chewiness of gels with 4% SPI were lower than of gels with 2% SPI. The rheological findings indicated that the thermal stability of the myofibrillar protein increased when SPI was added. The initial relaxation time of T 2b , T 21 , and T 22 decreased when SPI increased; meanwhile, the peak ratio of P 21 increased significantly (P < 0.05), implying that water had lower mobility. Overall, the 2% SPI could enhance gel characteristics and water-holding capacity of pork myofibrillar protein under 200 MPa. [Display omitted] • SPI and HHP combined increased cooking yield and immobilized water. • SPI and HHP combined increased gel hardness and storage modulus. • SPI and HHP combined increased the thermal stability of myofibrillar protein. • SPI and HHP combined products the low-salt gel with good quality. [ABSTRACT FROM AUTHOR]

In order to investigate the effect caused by floating bodies on vortex-induced vibration (VIV) of risers, a composite pipe with the aspect ratio of 250 is tested under coupled uniform and shear oscillatory flow, with Reynolds number ranging from 2000 to 24000. The characteristics of VIV amplitude and frequency of the model under uniform flow are compared and analyzed comprehensively, alongside experimental results from literature, validating the reasonability of the test devices and methods. The key characteristics of VIV under coupled top-end surge and uniform flow are then discussed. Some phenomena involving time-varying frequency, mode transition, amplitude modulation and so on are induced by the oscillation of flow, which also promotes the generation of high-order and low-order harmonic components in cross-flow and in-line frequencies. When combined with uniform flow, the identification of time-varying frequency and amplitude modulation is significantly enhanced by uniform flow with lower velocities while the top-end surge mainly affects the vibration instability in higher-velocity uniform flow. The oscillation amplitude and frequency of the top-end surge mainly change the values of cross-flow vibration amplitude, but affect the in-line amplitude both for trend and values, inducing the increase of values in the range of medium and low reduced velocities and the changing of the distribution of reduced velocity corresponding to the local maximums in the higher range. The combination of the top-end surge related to the movement of floating body and the background flow is responsible for the high-order harmonics of VIV frequency and the enhancement of VIV amplitude under certain reduced velocities, which may induce additional fatigue damage of riser. It is suggested that the movement of floating body should be taken into account in the evaluation of VIV of risers. • The VIV of a flexible model under top-end surge and uniform flow is investigated experimentally. • The intermittent VIV is induced by top-end surge, which could be enhanced by uniform flow with low and medium velocities. • For high velocity cases, the VIV is dominated by uniform flow while top-end surge plays a disturbing role. • The effects of the surge amplitude and frequency on VIV are related to uniform flow velocity and vibration direction. [ABSTRACT FROM AUTHOR]

In order to study the potential of replacing pork back-fat by sodium alginate solution (sodium alginate/water = 1/29, W /W), the physico-chemical, protein conformation and sensory of frankfurters made with various amounts of pork back-fat and sodium alginate were evaluated. With the increase of sodium alginate solute, the fat and energy was decreased significantly (P <.05). Compared with the control, the cooking yield, emulsion stability, L⁎ and ΔE values were not different significantly (P >.05) when pork back-fat was replaced by 25% and 50%, meanwhile, a decrease of α-helix content accompanied by an increase of β-sheet, β-turn and random coil content, more hydrophobic and tyrosine residues became exposed, those implied the hardness was increased. The texture, juiciness and overall acceptance scores were decreased significantly (P <.05) when pork back-fat was replaced beyond 50%. From the above, the use of sodium alginate solution instead of pork back-fat could transform protein structure and lowered fat and energy of frankfurters. • Fat content and energy were decreased when replaced pork back-fat by sodium alginate solution. • The physico-chemical and protein structure were affected by sodium alginate solution. • Added sodium alginate solution, increased β-sheet, β-turn and random coil content. • Sodium alginate solution can be utilized to reduce the fat content of frankfurters. [ABSTRACT FROM AUTHOR]

A numerical model for computing the vortex-induced vibration (VIV) and fatigue damage of steel catenary risers (SCRs) was developed. The structural dynamics were accurately simulated using an absolute nodal coordinate formulation (ANCF). The Van der Pol wake oscillator is applied to generate the fluctuating lift, which is further transformed into the cross-flow direction by considering the structural deformation. The Randolph-Quiggin (RQ) model and the Coulomb friction 'bilinear' model are employed to simulate the vertical and lateral riser-soil interactions, respectively. After case validations, the effects of riser-soil interaction on the VIV amplitude, frequency, mode, and fatigue of the SCR at different current angles are investigated, and a sensitivity study of different seabed model parameters is discussed. The bands of significant VIV frequencies were broadened by riser-soil interactions, accompanied by more frequency components of disturbance and more abundant vibration modes. Severe fatigue damage cannot be captured by the truncated model, and seabed models that require improvement are ignored. It is suggested that vertical and lateral riser-soil interactions should be considered in the evaluation of VIV fatigue damage for SCRs. • A time-domain VIV model of SCR considering vertical and lateral riser-soil interactions is proposed. • The severe fatigue damage near TDP cannot be captured by the truncated model ignoring riser-soil interaction. • The frequency components and mode of VIV at different current angles are affected the by the riser-soil interaction. • A parameter sensitivity investigation regarding seabed model properties has been carried out. [ABSTRACT FROM AUTHOR]

In icy regions, the vibration induced by broken ice poses a hazard to risers, in addition to vortex-induced vibration (VIV). A numerical investigation has been conducted to explore the dynamic response of risers in seas with fragmented ice floes. Assuming the broken ice as a single rigid floating body bonded by particles, the flow with water and ice is considered a two-phase flow, which is established using the Smooth Particle Hydrodynamics (SPH) method based on the quasi-fluid model. Verification of the model was achieved by simulating the three-dimensional flow around a surface-piercing cylinder and VIV. Accurate predictions were made regarding hydrodynamic forces, uplift values of the free liquid surface at the front stagnation point of the cylinder, and riser motion. Furthermore, the SPH model was expanded to encompass the realm of ice-water structural interaction (IWSI) combined with the basic principle of bidirectional fluid-structure coupling, facilitating the simulation of riser vibration within ice-water flows. The results indicate that the ice load remained the principal contributor to the force on the vibrating riser, while the riser exhibited irregular motion, demonstrating a strong coupling between forces and riser movement. • The study is the preliminary implementation of the SPH solution of ice-water two phase flow. • Two-phase control equations of ice-water flow are established based on the quasi-fluid model. • A description of the broken ice SPH method based on the adhesive model is established. • The proposed SPH model is extended to the IWSI field to investigate the IIV of the riser. [ABSTRACT FROM AUTHOR]

Offshore wind-hydrogen systems operate in harsh marine environments for extended periods, posing risks of low accessibility and high failure rates. This paper proposes a data-driven fault detection framework for offshore wind-hydrogen systems, aiming to promptly detect potential faults based on the system's physical parameters. The research establishes a comprehensive model based on the operating principles of offshore wind-hydrogen systems. The study uses fault injection techniques to simulate common partial faults in offshore wind-hydrogen systems and collects relevant physical parameters (such as wind turbine power generation, energy storage battery charging/discharging current, and electrolyzer hydrogen production rate). A fault detection model was constructed using a combination of Convolutional Neural Networks (CNN) and Bidirectional Long Short-Term Memory (BiLSTM) to enable precise detection of potential faults in the system. The established model provides theoretical support for designing, optimizing, and operating offshore wind-hydrogen systems, reducing reliance on actual experiments and lowering project risks and costs. Introducing artificial faults can evaluate the system's performance in different fault scenarios. This paper proposes a CNN-BiLSTM fault detection method that achieves automatic feature extraction and high-precision classification of time-series fault data, confirming the practicality and feasibility of offshore wind-hydrogen systems. This investigation realizes the integration of the offshore wind-hydrogen system model and deep learning, as well as a fully automated learning process from data to fault detection. By calculating and comparing results, it is verified that the framework has a high accuracy of 96.9%. This innovative research offers new methods and perspectives for enhancing the reliability and efficiency of fault detection in offshore wind-hydrogen systems. • A comprehensive multi-system simulation model for offshore wind-hydrogen systems is established. • Fault injection is employed to acquire data samples for offshore wind-hydrogen systems. • Utilizing the CNN-BiLSTM method, a high-accuracy deep learning fault detection model is crafted. • A simulation model-based data-driven deep learning framework for fault detection is devised in this study. [ABSTRACT FROM AUTHOR]