bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical Model for Flow of High-pressure Gas in Microscale
Authors: Chang Jin , Hu Zhiming , Liu Huaxun , Duan Xianggang , Xu Ke 
Published: February 2023

Abstract
Fused silica micro-tubes, whose size is similar to the pore throat in a low permeability reservoir, simplify the complex and tortuous of channels and throats and are used in this study to stimulate the flow pattern with micro-scale methods. A high-pressure micro-tube holder (designed and developed independently with a patent for invention) has been used to study gas flow patterns within the pressure range of 0.1MPa-30MPa. Moreover, we establish a gas flow equation and analysis the applicability of different inlet pressure based on the experiment result. The result shows: First, the pressure drop in the micro-tube is predominantly induced by friction resistance at low inlet pressure. While under relatively high inlet pressure, the impact of kinetic energy conversion and throttling effect on pressure drop shall be considered. Second, we build up a gas-flow equation in a micro-tube considering friction resistance, kinetic energy loss, and throttling effect. We also analyze the applicability for different diameters and inlet pressure. These research achievements were enriched in microtubule flow; different conditions have been identified for a different equation which has significant meaning to gas flow regulation in tight sandstorm reservoirs.
Analysis and Construction of Typical Application Scenarios of Distribution Network Energy Storage Technology
Authors: Mao Xiangyang , Xiao Qianyuan , Han Zhanjun , Zhang Caihong 
Published: February 2023

Abstract
The power market in China is continuing to open, the energy Internet format is gradually being improved, and the energy storage system is going to become a major key technology that will support China’s energy development strategy. All of these developments are taking place against the backdrop of China’s massive investment in the development of new energy. It is one of the effective approaches to handle the problem of grid connection of new energy electrical power generation. This paper investigate and summarizes the typical application scenarios of the system from the three major fields of user side, power grid side, and power generation side, and takes user-side energy storage as an example to build an calculation model, and at the same time verifies it with cases to reflect the practical value. So as to draw the conclusion that the energy storage configuration can effectively regulate the output.
Mechanism Design of Blockage Management Based on Local Flexibility Market under High Proportion of Distributed Energy
Authors: Wang Shenglin , Hu Zhongshan , Su Jiehe 
Published: February 2023

Abstract
Continuous access to distributed energy sources greatly increases the uncertainty and complexity of distribution network operations. The distribution network is prone to congestion phenomena such as voltage or tide overruns and equipment overloads, thus causing a decrease in distribution network power supply reliability. Blockage management in distribution networks based on local flexibility markets is one of the blockage management methods currently adopted in many European regions. In order to clarify the operation mechanism of the local flexibility market, firstly, the basic requirements of the local flexibility market are introduced, including the concept of the local flexibility market, market members, and their rights and responsibilities; secondly, four key issues of local flexibility market construction are analyzed in detail: timing, controllability of resources, operating ownership, and Coordination of market members. Further, the organization and transaction process of the European local flexibility market is sorted out. Finally, two typical cases in the UK and their current market operation are introduced.
Research on Control Strategy of High Voltage Cascaded Energy Storage Converters
Authors: Chen Man , Wang Wen-Jie , Li Yong-Qi , Liu Bin , Li Yu-Xuan 
Published: February 2023

Abstract
High voltage cascaded energy storage power conversion system, as the fusion of the traditional cascade converter topology and the energy storage application, is an excellent technical route for large capacity high voltage energy storage system, but it also faces many new problems. How to use the control strategy to play better the advantages of high voltage cascaded energy storage has gotten more and more attention. This paper summarizes the research on power control, balance control, and fault-tolerant control of high voltage cascaded energy storage to provide a reference for related research and engineering application.
Crankshaft Stress Telemetry Device and Its Low Power Strategy
Authors: Guo Shenggang , Wang Daihua , Zhang Kaige , Zhang Qiang , An Xuehui 
Published: February 2023

Abstract
In view of the fact that the crankshaft of an internal combustion engine lacks the support of measured stress data due to the closed working environment, a real-time stress test device for crankshaft and its low power strategy were studied. An embedded telemetry technology is used to solve the system miniaturization and low-power strategy. The integrated circuit chip is used to realize the miniaturization design, and a specialized power management scheme is designed to realize the low-power strategy. The actual test shows that the device can run continuously and stably under the environment of high temperature and oil pollution inside the crankcase and can record the stress curve of the crankshaft and transmit it to the remote computer in real time, which realizes the data visualization on the computer. The designed low-power strategy can help the device complete a single test period, and the device has higher promotion value and practical significance.
Static Voltage Stability of Distributed Power Access Distribution Network Based on Thevenin Equivalent
Authors: Yang Lichao , Wang Yanshuo , Yang Yang , Yang Shenquan 
Published: February 2023

Abstract
As part of the process of voltage regulation, a voltage stability analysis approach suitable for wind power system needs to be established. On equivalent Thevenin parameters, the ordinary equivalent black-box Thevenin method is unable to characterize the wind connection mechanism. Accordingly, this paper proposes an analytical method equivalent to Thevenin for analyzing the steady-state voltage of electricity systems with wind energy. The equivalent model is adopted in this method connected to the wind energy grid because of the equivalence of injected nowaday sources. The analytic expressions for the equivalent Thevenin parameters are then derived in two equivalent ways, and the wind connection mechanism affecting equivalent Thevenin parameters is revealed. Lastly, the enhanced IEEE 30 bus system with wind power is simulated and validated, and it is verified that the research contents of the study contents can enhance the voltage stability of Network connection point. On the other hand, the research content of this topic reduces the active power wastage of the distributed generation connection, so as to keep the balanced terminal voltage distribution.
Study on the Influence of Gas Hydrate Reservoir Creep on Borehole Wall Deformation
Authors: Liu Xiaolan , Zheng Yong , Cao Jifei , Wang Yaohui , Ma Yongqian , Bi Yantao 
Published: February 2023

Abstract
Hydrate decomposition caused by long-time drilling operations will reduce the strength of the reservoir and increase the risk of borehole wall damage. At the same time, the creep characteristics of the hydrate reservoir may also lead to engineering problems such as borehole shrinkage and sticking in the later stage of drilling, which seriously affects the drilling safety. The creep parameters are introduced to explore the influence mechanism of hydrate decomposition, and hydrate-bearing sediment creeps characteristics on wellbore mechanical behavior. The influence law of sediment shale content and hydrate saturation on wellbore stability during hydrate reservoir drilling is analyzed. The result shows the hydrate-bearing sediments creep characteristics will lead to the homogenization of stress distribution in different directions of the hydrate reservoir around the well, make theplastic yield zone shape around the well to circular, and may lead to the overall collapse of the well wall. Drilling for a long time will lead to a greater hydrate decomposition range and plastic yield zone around the well. Lower initial hydrate saturation, smaller sediment strength, and larger initial plastic strain and yield range of the formation. Increase of shale content will enhance the creep characteristics of sediments and aggravate yield degree of formation.
On Hole Cleaning Evaluation Method in Highly Deviated / Horizontal Well Sections
Authors: Ma Yongqian , Yang Chunxu , Liu Xiaolan 
Published: February 2023

Abstract
To solve the problem of hole cleaning quantitative evaluation in highly deviated / horizontal well sections, experiments are made on the experimental system of highly deviated / horizontal well sections, the influence laws of annulus return speed, pipe speed, drill tool eccentricity, well deviation angle, drilling fluid density and viscosity, cuttings size and other parameters on cuttings bed thickness are studied, and the calculation models of steady-state dimensionless cuttings bed thickness in horizontal well and highly deviated well are established, the calculation error is controlled within ±5%, which provides an accurate method for hydraulic parameter optimization and design.
Overview of the ATLAS ITk pixel detector
Authors: Heggelund A.L. 
Published: February 2023

Abstract
In the high-luminosity era of the Large Hadron Collider, the instantaneous luminosity is expected to reach unprecedented values, resulting in up to 200 proton-proton interactions per bunch crossing. To cope with the resulting increase in occupancy, bandwidth and radiation damage, the ATLAS Inner Detector will be replaced by an all-silicon system, the Inner Tracker (ITk), where the innermost part will consist of a pixel detector with about 14 m2 of active area. Several silicon sensor technologies will be employed in order to deal with the strict requirements in terms of radiation hardness, power dissipation and production yield. Prototype modules assembled with RD53A readout chips are being built to evaluate their production rate, thermal- and electrical performance, before- and after irradiation. In addition, a novel serial powering scheme will be implemented in the ITk pixel detector, which will help to reduce the material budget of the detector inside the active detector volume as well as power dissipation. Multiple system-level tests are being done with serial powering of pixel modules. The latest development of prototype modules, serial powering tests, and procedures of integration of modules and electrical services are presented.
Satellite-based global maps are rarely used in forest reference levels submitted to the UNFCCC
Authors: Melo Joana , Baker Timothy , Nemitz Dirk , Quegan Shaun , Ziv Guy 
Published: February 2023

Abstract
The Earth observation (EO) community is coordinating a range of activities in support of the Global Stocktake. One objective is to enhance the uptake of satellite-based global-scale maps (hereafter ‘EO products’) in national greenhouse gas (GHG) inventories submitted to the United Nations Framework Convention on Climate Change (UNFCCC). To measure progress towards this objective, we compile information on the use of EO products on land cover, fire, and above-ground biomass to derive carbon flux estimates in forest reference levels from 56 tropical countries submitted to the UNFCCC between 2014–2022. The global forest change (GFC) was the only EO product used to measure land extent and change, and was used by almost half the countries. Only two countries used existing EO products for fire mapping. Four countries used biomass maps, although only indirectly, such as for comparing with biomass estimates from field plot measurements or with IPCC defaults. The uptake is limited but improved the measurement, reporting and verification capacity of 22 countries. The relatively high uptake of the GFC demonstrates the importance of meeting essential conditions in the IPCC guidance when developing EO products, including conditions on spatial and temporal resolution, temporal coverage and consistency, and the flexibility to adapt to biophysical thresholds in national definitions. The limited use of other global land EO products underlines the need for developers of EO products to interact with groups responsible for GHG inventories and experts familiar with IPCC guidance so that their products are suitable for national reporting, and thus contribute to more complete aggregated estimates in the Global Stocktake.
A full-Eulerian approach for simulation of a system of fluid–rigid–elastic structure interaction based on the vorticity-stream function formulation
Authors: Farahbakhsh Iman , Paknejad Amin , Ghassemi Hassan 
Published: February 2023

Abstract
A monolithic mathematical framework for understanding the fluid–rigid–elastic structure interaction problem is proposed. A numerical method in a secondary formulation of the Navier–Stokes equations accompanying a technique for imposing the rigid boundaries is applied. The one-fluid formulation of the incompressible Navier–Stokes equation, containing the terms governing the elastic structure, is transformed into the vorticity-stream function formulation. The rigid structure is imposed in the flow field based on the velocity–vorticity kinematic relation and harmonic function theorem. The vorticity, level-set function, and left Cauchy–Green deformation tensor are updated utilizing three transport equations to investigate the evolution of the velocity field, elastic structure(s) configuration, and elastic stress tensor. The method is implemented to solve three challenging problems, and the results show its capabilities in proper imposing the rigid structures in the flow field and also the simultaneous modeling the rigid and elastic structure interactions with incompressible fluid flow.
A strain-engineered graphene qubit in a nanobubble
Authors: Park Hee Chul , Han JungYun , Myoung Nojoon 
Published: February 2023

Abstract
We propose a controllable qubit in a graphene nanobubble (NB) with emergent two-level systems (TLSs) induced by pseudo-magnetic fields (PMFs). We found that double quantum dots can be created by the strain-induced PMFs of a NB, and also that their quantum states can be manipulated by either local gate potentials or the PMFs. Graphene qubits clearly exhibit avoided crossing behavior as electrical detuning, with energy splittings of about few meV. We show a remarkable tunability of our device design that allows a fine control of the Landau–Zener transition probability by strain engineering of the NB, showing half-and-half splitting at the avoided crossing point. Further, we demonstrate that the TLSs in the NB exhibit Rabi oscillations near the avoided crossing point, resulting in very fast Rabi cycles of a few ps.
Anomalous Hall effect and two-dimensional Fermi surfaces in the charge-density-wave state of kagome metal RbV3Sb5
Authors: Wang Lingfei , Zhang Wei , Wang Zheyu , Poon Tsz Fung , Wang Wenyan , Tsang Chun Wai , Xie Jianyu , Zhou Xuefeng , Zhao Yusheng , Wang Shanmin , Lai Kwing To , Goh Swee K 
Published: February 2023

Abstract
AV3Sb5 (A = Cs, K, Rb) is a recently discovered superconducting system (

T

c

∼
0.9

–2.5 K) in which the vanadium atoms adopt the kagome structure. Intriguingly, these systems enter a charge-density-wave (CDW) phase (

T

C
D
W

∼
80

–100 K), and further evidence shows that the time-reversal symmetry is broken in the CDW phase. Concurrently, the anomalous Hall effect (AHE) has been observed in KV3Sb5 and CsV3Sb5 inside the novel CDW phase. Here, we report a comprehensive study of a high-quality RbV3Sb5 single crystal with magnetotransport measurements. Our data demonstrate the emergence of the AHE in RbV3Sb5 when the CDW state develops. The magnitude of the anomalous Hall resistivity in the low temperature limit is comparable to the reported values in KV3Sb5 and CsV3Sb5. The magnetoresistance channel further reveals a rich spectrum of quantum oscillation frequencies, many of which have not been reported before. In particular, a large quantum oscillation frequency (2235 T), which occupies ∼56% of the Brillouin zone area, was recorded. For the quantum oscillation frequencies with sufficient signal-to-noise ratio, we further perform field angle-dependent measurements, and our data indicate two-dimensional Fermi surfaces in RbV3Sb5. Our results provide indispensable information for understanding the AHE and band structure in kagome metal AV3Sb5.
Nugget zone characterization of friction stir welded hypereutectic Al-Si alloy
Authors: Prasad Rabindra , Kumar Harikishor , Kumar Parshant , Gupta Abha 
Published: February 2023

Abstract
Despite excellent properties of aluminium silicon (Al-Si) alloys in several aircraft and automotive applications, its usage is limited because near net shape casting of Al-Si alloys may cause several defects like surface pinholes and grooves. Fabrication of components and then welding them via fusion-based welding processes imposes issues like porosity and slag inclusions which may severely degrades its properties. Thus in present study, friction stir welding (FSW) was employed for welding of hypereutectic Al-Si cast alloy. The nugget zone (NZ) of welded alloy and its as-cast counterparts were characterized for their performance in terms of mechanical and tribological behaviour. The results depicted fragmentation of α-Al dendrites, refinement and redistribution of acicular Si particles as a result of stirring with high strain rate, and improvement in mechanical properties such as ultimate tensile strength, yield strength, ductility, hardness and wear resistance as compared to as-cast alloy. It is also shown that disparate wear mechanisms occured in friction stir welded (FSWed) and as-cast alloys. A sizeable amount of adhesion with plastic deformation and delamination pits were observed for as-cast alloy, while the dominant mechanism in FSWed alloy was peeling with little adhesion.
Neural network enhanced measurement efficiency for molecular groundstates
Authors: Iouchtchenko Dmitri , Gonthier Jérôme F , Perdomo-Ortiz Alejandro , Melko Roger G 
Published: February 2023

Abstract
It is believed that one of the first useful applications for a quantum computer will be the preparation of groundstates of molecular Hamiltonians. A crucial task involving state preparation and readout is obtaining physical observables of such states, which are typically estimated using projective measurements on the qubits. At present, measurement data is costly and time-consuming to obtain on any quantum computing architecture, which has significant consequences for the statistical errors of estimators. In this paper, we adapt common neural network models (restricted Boltzmann machines and recurrent neural networks) to learn complex groundstate wavefunctions for several prototypical molecular qubit Hamiltonians from typical measurement data. By relating the accuracy ɛ of the reconstructed groundstate energy to the number of measurements, we find that using a neural network model provides a robust improvement over using single-copy measurement outcomes alone to reconstruct observables. This enhancement yields an asymptotic scaling near ɛ
−1 for the model-based approaches, as opposed to ɛ
−2 in the case of classical shadow tomography.
Emergency Department Co-testing for Human Immunodeficiency Virus When Testing for Gonorrhea and Chlamydia: A Readily Available, Missed Opportunity for Targeted HIV Testing in Emergency Departments
Authors: Phelan Michael P , Panakkal Vinothini , Muir McKinsey , Seballos Spencer , Kadkhoda Kamran 
Published: February 2023

AbstractObjectivesConducting human immunodeficiency virus (HIV) testing in emergency departments (EDs) can be an effective approach to testing and reaching populations at highest risk of contracting HIV.MethodsAll gonorrhea and chlamydia (G/C) and HIV tests ordered in the Cleveland Clinic Health System’s 14 EDs were included in the analysis. Data were collected from electronic health records. Descriptive statistics, with medians and means, were computed.ResultsFrom January 1, 2019, to December 31, 2021, we reviewed ED visits for the purpose of sexually transmitted infection (STI) screening, with an emphasis on G/C screening. In October 2019, both HIV rapid testing and G/C testing began across all 14 Cleveland Clinic EDs. The overall rate of co-testing for HIV when obtaining a G/C test for STI evaluation increased overall to around 30% for our health system EDs, with some individual EDs approaching 60%.ConclusionsThe approach the Cleveland Clinic implemented is an effective way to test for HIV in the ED. Local health departments and stakeholders in HIV communities should support and collaborate with EDs in their jurisdictions to accelerate HIV testing initiatives by using an HIV plus G/C co-testing metric.
Large-Volume Fat Grafting to the Breast With External Expansion Assist
Authors: Moltaji Syena , Hoffbauer Stephanie , Brown Mitchell H 
Published: February 2023

Abstract

Background
Large-volume autologous fat transfer (AFT) to the breast with external expansion has emerged as an alternative to alloplastic augmentation or reconstruction in appropriate patients.

Objectives
Report the authors’ technique for this procedure and experience with 49 consecutive patients of a single surgeon’s practice from 2013 to 2021.

Methods
The authors performed a retrospective analysis of consecutive patients undergoing fat grafting to the breast with preexpansion. Patients were included if they had a clinical problem amenable to correction with large-volume fat injection and adequate donor sites, and were willing to undergo preexpansion. Data was collected through chart review and deidentified. Demographics, diagnosis, radiation status, volume grafted, complications, and adjunct procedures were recorded.

Results
Forty-nine patients underwent external expansion with AFT by a single surgeon. Twenty-three patients (47%) had hypoplastic indications, including tuberous breast deformity (n = 9) and Poland syndrome (n = 1). Seventeen patients (35%) had indications for secondary breast revision of previously placed implants. Nine patients (18%) utilized the procedure for primary oncologic breast reconstruction. A total of 71 procedures were performed, with an average of 1.45 procedures per patient. The average volume of fat grafted per breast was 372 mL for hypoplasia, 240 mL for secondary breast revision, and 429 mL for oncologic reconstruction. Concurrent procedures included implant exchange, implant removal, mastopexy, and breast reduction. Follow-up ranged from 1 to 84 (average = 20) months.

Conclusions
The authors’ experience shows promising results with external expansion and large-volume fat grafting to the breast.

Level of Evidence: 4