bluuebunny/crossref_metadata_2025_split huggingface dataset:
Quiet Eye supports winner shots in a simulated table tennis competition
Authors: Vincze Andrada , Iliescu Dragoș , Jurchiș Răzvan 
Published: December 2022

BackgroundQE is defined as the final fixation on a specific location or object in the visuomotor workspace, for a minimum of 100 ms, that enables the athletes to gather relevant information before a critical movement. Several lines of research indicate that QE contributes to sports performance. However, its contribution to performance is derived mainly from research investigating isolated motor tasks. Therefore, little is known about its contribution in realistic competitional settings.MethodsThe present study determined whether QE contributes to table tennis performance obtained from matches played in a simulated competition. Athletes (N = 10) performed two matches, one against a difficult and one against an accessible opponent. Gaze behavior was captured using Tobii Glasses 2.ResultsWe found that athletes made longer QE before winner balls (i.e., balls that scored a point), compared to forced and unforced errors (pbonferroni = 0.005, t = −4.45; pbonferroni <0.001, t = −6.45). Confirming that QE contributes to performance in a real match even in a competitional setting. We found no significant effect for the difficulty of the match, nor an interaction between the difficulty of the match and the type of shots Fs (1, 9) < 2.26, ps >0.16 0.70, η2ps < 0.20.ConclusionsThe present study provides evidence for QE's contribution to sports performance investigated in a “gold standard” ecological environment. More specifically, it provides evidence that QE gradually increases with the quality of the shot. Identical patterns were found regardless of the difficulty of the match.
Information technology improves the quality of transfusion practice in China
Authors: Xu Gui‐Ping , Wu Li‐Fang , Xu Xiao‐Min , Li Jing‐Jing , Gao Qi , Lu Hua 
Published: December 2022

AbstractBackground and ObjectivesTransfusion services in China must establish a quality management system, and regular inspection of quality indicators is an important component of quality management. Although the positive role of information technology in reducing human errors has been widely reported, its role in improving transfusion quality indicators still requires further study. This study explores the role of information technology in improving the quality of transfusion practice.Materials and MethodsWe developed an optimized blood transfusion management information system and then analysed the changes in four quality indicators before and after using the system to clarify the role of information technology in improving the quality of transfusion practice.ResultsAfter using the optimized system, the completeness rate for transfusion request forms increased from 81.5% to 99.3%; an unqualified doctor's signature was the most common incomplete content (0.45%). The appropriate transfusion rate increased from 87% to 99.4%, and red blood cell and frozen plasma utilization in most surgical departments decreased. Although the reporting rate for adverse transfusion reactions increased from 0.22% to 0.49%, these increases might be partly due to changes in transfusion regulations. The adequacy rate of transfusion medical records increased from 74.8% to 90.4%. Overall, the inadequacy of informed consent for transfusion, pre‐transfusion laboratory tests and documentation of the transfusion process were reduced from 6.4%, 6.2% and 12.6% to 1.7%, 2.0% and 5.9%, respectively.ConclusionInformation technology can play an important role in improving the quality of transfusion practice, as part of a programme of medical education, regular audit and other measures.
Periosteal reaction‐like lesions at the cranial aspect of the humeral diaphysis have a high prevalence in older, large breed dogs and may represent entheses of the superficial pectoral muscles
Authors: Nickel Mareike‐Kristin , Schikowski Lisa , Staszyk Carsten , Schaub Sebastian 
Published: December 2022

AbstractAuthors have commonly observed lamellar periosteal new bone formation at the cranial aspect of the humeral diaphysis in mediolateral radiographs of the humerus for large breed dogs with no evidence of pain or lameness. The aim of this retrospective, analytical study was to investigate the appearance and prevalence of “humeral periosteal reaction‐like lesions” (HPRLL) in dogs and identify any predispositions. Mediolateral radiographs of humeri were evaluated and the presence and extent of “humeral periosteal reaction‐like lesions” at the cranial aspect of the humerus were recorded. Macroscopic and histological examination of the humeri were performed for one dog with HPRLL. A total of 2877 mediolateral radiographs of 1727 dogs were included and focal or extended periosteal reaction‐like lesions were found in 643 humeri of 387 dogs. Body weight ≥ 30 kg and age ≥ 7 years had a statistically significant, positive effect (P < 0.001) on the presence of HPRLL. German Shepherd dogs and Rottweilers were overrepresented in the group with HPRLL (P < 0.01). At the level of the HPRLL, the enthesis of the superficial pectoral muscles (M. pectoralis descendens and M. pectoralis transversus) to the Crista tuberculi majoris and Crista humeri were macroscopically and histologically identified. The authors propose that higher mechanical loads to the enthesis in large breed dogs may lead to physiological, age‐related remodeling processes of the muscular attachment. The finding should not be confused with a pathological condition such as bone neoplasia.
Optimal Energy Consumption and Response Capability Assessment for Hydraulic Servo Systems Containing Counterbalance Valves
Authors: Sun Hao , Tao Jianfeng , Qin Chengjin , Yu Honggan , Xu Shuang , Zhuang Qianwei , Liu Chengliang 
Published: December 2022

Abstract
Counterbalance valves (CBVs) are broadly applied in hydraulic manipulators, which is essential to ensure safe operation while moving a heavy load. They inevitably introduce additional energy consumption and poor dynamic performance. For the manipulator joint in tunnel boring machines, smooth and precise motion control has to be realized. However, for the forward design considerations, in this case, no systematic work has been done to determine the component parameters based on an energy-saving approach and to derive the natural frequency of the joint at the hydraulic level. To fill this gap, this paper proposes a forward design approach for the proportional valve-controlled hydraulic cylinder system containing CBVs, which is a basic hydraulic configuration adopted for the manipulator joint. Specifically, the optimization model aiming at the minimum energy consumption is defined and improved to solve the key parameters, including the pilot ratio of the CBV and the area ratio of the cylinder. By considering constraints, the other component parameters could be further calculated. After that, the theoretical derivation of natural frequency is given to evaluate the response capability of the system. The overall design procedure is presented to determine the cylinder, CBV, control valve, and constant pressure supply. Based on the validated numerical model, the energy-based design principle is proven effective and could ensure that energy saving is not less than 5% and not more than 36% on average. Furthermore, the natural frequency obtained by the sweep test is verified to be consistent with the theoretical value, and the impact of this parameter on control performance is analyzed. The results indicate that the proposed approach has an excellent guide for the forward design of such systems.
Cooling and Flow Characteristics of Multi-Channel Wall Jet Structure With Film Holes at Blade Leading Edge
Authors: Wang Huihui , Deng Qinghua , He Wei , Feng Zhenping 
Published: December 2022

Abstract
Efficient cooling is imperative for gas turbine blades that suffer from hot gas erosion. Cooling and flow characteristics of multi-channel wall jet structure combined with film holes for blade leading edge are numerically investigated through the Reynolds-averaged Navier–Stokes method in this paper. Several geometrical schemes with different rows and diameters of film holes were conducted, and the influences of the cooling air mass flow ratio of the first coolant supply cavity were also considered, which presented the detailed flow and cooling characteristics of wall jet and film composite cooling on conjugate heat transfer. The results implied that film extraction improves the overall cooling effectiveness compared with pure wall jet cooling. And the mainstream intrusion happens in some film holes at the bottom of blades, especially on the pressure side. The film-hole diameter can raise the mass flow ratio and enhance external thermal protection produced by cooling air, and it also affects the uniformity of film flow and the temperature gradient of some regions for turbine blades. Furthermore, the cooling performance and pressure loss are significantly influenced by the coolant mass flowrate of the first cooling air supply cavity. This study will offer a consultation for the design of film-hole structures for multi-channel wall jet cooling.
A Study of Offshore Wind Turbine Wake Effects in Yaw Conditions Using an Improved Actuator Line Method
Authors: Fan Ning , Liao Kangping , Wang Qian , Fang Zheng , Zhou Hui 
Published: December 2022

AbstractThe study of wind turbine wakes is very important for the layout of offshore wind farms. The technique of regulating the yaw angles of the upstream wind turbine to lessen the influence on the downstream turbines has attracted continual attention in recent years. In this study, the wake interactions between a yaw wind turbine and a downstream wind turbine are investigated using a numerical technique based on the openfoam solver in conjunction with an improved actuator line method. The Gaussian anisotropic body force projection method and the integral velocity sampling method are the two fundamental components of the improvement of the actuator line method. The NREL 5-MW wind turbine benchmark model is used to test the numerical accuracy. The simulation of the wake effects from the upstream turbine in non-yawed conditions that follows has good agreement with the results that have been published in the literature. Finally, this work presents a number of predictions about the power coefficients and wake characteristics of two tandem-arranged wind turbines at various yaw angles based on these precise verification efforts. The results of the analysis in yaw conditions are used to derive the yaw wake characteristics and the optimal yaw angle range. As the yaw angle increases, the total power of the wind turbine increases and then decreases, and the upstream wake area decreases significantly. The total power reaches its maximum at 20–30 deg. The research content of this paper will provide an important reference for wind farm scheduling.
Wave Effects on Vortex-Induced Vibrations of a Top-Tensioned Riser
Authors: Yin Decao , Wu Jie , Lie Halvor , Passano Elizabeth , Saevík Svein , Grytoøyr Guttorm , Tognarelli Michael A. , Andersen Torgrim , Igland Ragnar , Karunakaran Daniel , Gaskill Collin 
Published: December 2022

Abstract
Offshore drilling risers and many production risers are top-tensioned risers (TTRs), connecting the vessel and seabed via joints. External loads such as currents, waves, and vessel motions introduce cyclic loads and motions on riser sections and associated components, such as universal joint, flex joints, and well head at the bottom, which may shorten the service life due to accumulated fatigue damage. Dynamic responses under combined currents and waves are more complicated than vortex-induced vibrations (VIVs) caused by pure currents, and it is not fully understood. Several model test campaigns on TTR have been carried out at SINTEF Ocean (former MARINTEK) during the past decades. Currents, waves, and vessel motions were modeled, and the riser model responses were measured. In this study, selected cases from such model tests are analyzed, and used to validate a semi-empirical time domain VIV prediction tool—VIVANA-TD. A better understanding of the dynamic responses of TTR under combined currents and waves has been achieved. By comparing the results from numerical simulation using VIVANA-TD and model test measurements, validity and limitation of the time domain tool have been investigated. Important features that need to be considered are discussed. The experience gained from the present study establishes a good basis for VIV and wave load prediction of full-scale TTRs under combined currents and waves where the uncertainty of combined wave and VIV prediction is further reduced.
Numerical Study on Thermal Hydraulic Characteristics of Containment Spraying Experiment in COHERE Facility
Authors: Xu Junying , Yun Xiangyu , Weng Yanyun , Wu Xiaohang 
Published: December 2022

Abstract
The containment spray system is designed to control the pressure rise and avoid overpressure risk by condensing the steam in severe accidents. To study the containment thermal-hydraulic response characteristics after spraying, the spray experiment has been performed in COHERE facility. During the experiment, the spray droplet particle size, relative humidity, space pressure and temperature was measured.
This paper has performed the transient numerical simulation on the containment spray experiment by FLUENT. The particle trajectory model attached in Eulerian-Lagrange method is used to numerically simulate gas-liquid flow. The DPM (Discrete Particle Model) is applied to simulate the spray droplet particles behavior including motion, mass and heat transfer. The steam condensation is considered by adding the mass and heat equation source through UDF (User Defined Function). The comparison between the experimental data and calculation result has shown that, 1) the phenomena of steam condensation after spraying is well simulated by FLUENT; 2) the DPM model and the condensation consideration can simulate the thermal hydraulic characteristics such as the pressure and temperature decrease after spraying and control the relative humidity.
Numerical Study on Gas Entrainment by Vortex in T-Junctions
Authors: Zhu Xixi , Wang Naihua , Chi Xiangyu 
Published: December 2022

Abstract
Gas entrainment by free surface vortices in the Residual Heat Removal System (RHRS) would affect the safety of the reactor at the mid-loop operation for nuclear power plants. Thus, it is important to estimate the occurrence of this entrainment accurately. In this work, two-phase Computational Fluid Dynamics (CFD) simulations of a T-junction are performed. In the T-junction, the diameters of the branch/main pipes are 40/142.5 mm, and the lengths of the branch/main pipes are 3Db/6Dm. The Volume of Fluid (VOF) method and RNG k-ε model are employed in this simulation to get a clear gas-liquid interface. And, several cases of different flow rates at the mid-loop operation are studied. The simulation results could show the phenomena of free surface waves, the free surface vortex formation and evolution, gas entrainment by free surface vortex. At a low flow rate, the free surface in the main pipe is relatively stable with no wave, there is no occurrence of vortex core or vortex in the T-junction. With the flow rate increasing, the free surface in the main pipe begins to fluctuate, vortex core occurs below the free surface. It evolves downstream and disappears in the main pipe soon. The free surface waves in the main pipe become more intense when the flow rate continues to increase, and the free surface vortex begins to entrain air into the branch as the vortex core evolving downstream in the main pipe in a very short time. The phenomena of numerical simulation show a good agreement with experimental results. In this paper, physical fields are also analyzed to determine the effect and mechanism of the gas entrainment by free surface vortices.
Numerical Simulation of Flow Resistance Characteristics In the Test Section of a Rodlet Fuel Irradiation Device
Authors: Shuai Jin , Wenhua Yang , Jin Lei , Liang Zhang , Sheng Sun , Wenbin Zhao 
Published: December 2022

Abstract
The fuel rod irradiation device is tested in High Flux Engineering Test Reactor (HFETR). When the reactor is in stable operation, the allowable pressure difference between the inlet and outlet of the device ranged from 200 kPa to 300 kPa. In order to ensure the safety of the irradiation test, after investigation and analysis, the labyrinth throttling tooth is selected, and the resistance coefficient of the whole device is adjusted by changing the height and number of tooth. To ensure that the pressure difference between the inlet and outlet of the irradiation device is within the allowable range of the reactor duct. Based on the method of computational fluid dynamics, the flow resistance characteristics of the fuel irradiation device is studied by numerical simulation, and the reliability of Realizable k-ε model is verified by comparing with the experimental data. On this basis, the flow resistance characteristics of labyrinth throttling tooth with different structures are simulated and analyzed. The results show that reducing the tip clearance is beneficial to reduce the difference of pressure drop change percentage between different tooth. As the number of tooth increases, the ratio of pressure drop between internal teeth to pressure drop of the whole throttle tooth increases. The results can provide a reference for the hydraulic design of the rod fuel irradiation facility.
Three-Dimensional Numerical Simulation of the Natural Circulation Characteristics Based on PLANDTL-DHX for Different Modeling Methods of the Core
Authors: Guo Jinsong , Zhang Xueyuan , Zhao Haiqi , Lu Daogang , Zhang Yuhao 
Published: December 2022

Abstract
The passive decay heat removal system based on natural circulation can passively remove the heat from the core, which greatly improves the safety of the nuclear reactor. The Plant Dynamics Test Loop (PLANDTL-DHX) experimental facility can simulate the flow and heat transfer characteristics of the pool-type sodium-cooled fast reactor with an independent decay heat removal system in a natural circulation state. However, the natural circulation experiments based on the PLANDTL-DHX facility are difficult to present the detailed flow characteristics in the core completely. So it is necessary to adopt numerical simulation analysis to obtain the flow characteristics in the core. While due to the complex structure of the core with wrapped wire bundles, the modeling and calculation of the pool-type fast reactor need very rich computing resources. To reduce the demand for computing resources, the model can be simplified to some extent. In this study, two modeling methods are adopted for the core: 1. The model of the rod bundles and wrapped wires are simplified by the porous media model; 2. The wrapped wires are simplified by the porous media model, while the rod bundles are retained. The PLANDTL-DHX experimental facility modeled by two different core modeling methods is numerically simulated. By analyzing and comparing the experimental data of PLANDTL-DHX, the feasibility of two different modeling methods for numerical simulation research is verified. By analyzing and comparing the calculation results of two different modeling methods, the flow characteristics in the core during natural circulation are also obtained, and the characteristics of different modeling methods are summarized. This work can provide a reference for the safety analysis and simulation calculation of pool-type sodium-cooled fast reactor.
Data Driven Methods for Break Size and Location Estimation in LOCA Based on Deep Learning
Authors: Yuan Peng , Deng Jian , Qiu Zhifang , Xu Qinglan , Zhu Dahuan , Huang Tao , Li Zhongchun , Du Peng 
Published: December 2022

Abstract
Loss of coolant accident (LOCA) is one of the most important accidents in thermal hydraulic design of nuclear power plant. The traditional analysis method is difficult to realize the rapid prediction of the size and location of the break in the LOCA, while machine learning provides an idea for the rapid diagnosis of the initial cause of LOCA. In this paper HPR1000 which is independently designed by China was taken as the object, the process of LOCA under various break location and sizes is studied by using the advanced reactor system analysis code ARSAC (Advanced Reactor System Analysis Code). The key thermal hydraulic parameters including temperature, pressure, flow rate and water level in the transient process of LOCA are analyzed, and a series of data sets are generated. Based on convolution neural network algorithm of deep learning, the transient thermal hydraulic parameters of HPR1000 under different working conditions are learned and the accident diagnosis model is obtained. By comparing with the test data, the trained model can quickly and accurately predict the size and location of LOCA, which can be subsequently extended to the diagnosis of other kinds of accidents in nuclear power plants and has certain application prospects.
The Thermal-Hydraulic Analysis and Optimization of Annular Fuel for Lead-Cooled Fast Reactor
Authors: Kefan Zhang , Chong Qin , Wenmeng Dong , Rui Pan , Wenshun Duan , Hongli Chen 
Published: December 2022

Abstract
The annular fuel element is a safe and efficient new fuel element type. According to previous studies on PWRs, it can bear higher core power density while maintaining or even improving reactor safety when compared to traditional rod lattice fuel rods. In this paper, the application of annular fuel element in lead-cooled fast reactor is studied. Firstly, the flow and heat transfer characteristics of lead-bismuth in annular channel are analyzed by using the computational fluid dynamic method. On this basis, a thermal hydraulic calculation code suitable for annular fuel in lead cooled fast reactor has been developed, which is verified by comparing with CFD results. The application and design optimization of annular fuel in the lead-cooled fast reactor core are carried out using the developed annular fuel single channel code. The effects of different annular fuel parameters on the results are studied, and the core design with rod lattice and annular fuel element is compared and analyzed. The calculation results show that with the same fuel volume and coolant mass flow rate, the maximum core temperature of the annular fuel element is about 600K less than that of the rod bundle fuel element, which shows that the annular fuel element has significant safety superiority.
Machine Learning Modelling of Decay Heat Removal in High Temperature Gas-Cooled Reactor
Authors: Wu Hao , Yu Liangzhi , Niu Fenglei , Tu Jiyuan , Jiang Shengyao 
Published: December 2022

Abstract
In decay heat removal processes of the pebble-bed high temperature gas-cooled reactors, particle-scale radiative heat transfer between spheres is complicated for modeling and numerical simulations with traditional approaches. Artificial intelligence (AI) provides a new aspect to solve the dense granular dynamics. A machine learning model was developed for predicting the obstructed view factor between all possible pebble pairs in the large-scale nuclear pebble bed. The view factor dataset is obtained by random generation for sphere positions and thermal ray tracing method by CUDA paralleling for the view factor. The regression models are trained by gradient boosting decision tree (GBDT) method of XGBoost software for 2 ∼ 10 spheres cases. It is shown that the model performance will be greatly improved without overfitting by adding more trees rather than going deeper for every tree to reach R2 scores greater than 0.999. For engineering application, the trained XGboost models are applied to predict view factors in large-scale nuclear pebble bed during decay heat removal processes. From the transient numerical results, it takes about 10 h to get its maximum 1520°C only with thermal radiation and it is still less than the design upper limit.