bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fully connected layer‐shared network architecture for massive MIMO CSI feedback
Authors: Zhang Boyuan , Li Haozhen , Liang Xin , Gu Xinyu , Zhang Lin 
Published: January 2022

AbstractIn frequency division duplex (FDD) massive multiple‐input multiple‐output (MIMO) system, deep learning‐based channel state information (CSI) feedback approach improves CSI reconstruction accuracy. However, different models need to be trained and stored for different scenarios, which causes huge memory cost, especially at the user equipment (UE) side. In this letter, a fully connected layer‐shared (FCS) feedback architecture is proposed to simplify the feedback network at the UE. As a case study, the FCS architecture is applied on CsiNet and CRNet in the indoor and outdoor scenarios. Experimental results indicate that the network using the FCS architecture is able to achieve comprehensive performance with impressive storage saving.
Multi‐objective expansion planning of park‐level integrated energy system considering the volatility trend of CETP
Authors: Wang Lei , Dai Wei , Zhu Liuzhu , Wang Xuli , Yin Chenxu , Cong Hao , Shi Tiancheng , Qi Xianjun , Bi Rui 
Published: January 2022

AbstractWith the rapid development of carbon trading market, the volatility trend of carbon emission trading price (CETP) becomes one of the factors that cannot be ignored in energy system planning. Based on this, this paper proposes a multi‐objective expansion planning model for park‐level integrated energy system (PIES) that takes into account the volatility trend of CETP. First, the influencing factors of CETP prediction are filtered and downscaled, and a kernel extreme learning machine (KELM) model based on the improved multi‐objective grey wolf algorithm optimizer (IMOGWO) is used for probabilistic interval prediction of CETP. Next, the operational characteristics of each carbon emission device are analysed and a model for calculating the cost of carbon trading is proposed. Then, a two‐layer PIES planning model is developed with the objective of minimizing the annualized system cost and carbon emissions during the expansion planning cycle, the upper‐layer model is a planning model for solving equipment expansion scenarios, and the lower‐layer model is an operation model for calculating typical operation schemes. Finally, the simulation effect of the prediction model is verified by the European carbon trading data, and the planning schemes are compared and analysed to prove the effectiveness of the proposed method.
Improved iteratively reweighted least squares algorithms for sparse recovery problem
Authors: Liu Yufeng , Zhu Zhibin , Zhang Benxin 
Published: January 2022

AbstractIn this paper, some new algorithms based on the iteratively reweighted least squares (IRLS) method are proposed for sparse recovery problem. There are two important parameters in the IRLS method: a weighted parameter and a regularization parameter. On the one hand, in order to improve the performance of IRLS method, a new way is given to update the weight vector. On the other hand, for the regularization parameter, three new update methods are introduced to avoid the phenomenon that the regularization parameter drops too fast. Then, some improved iteratively reweighted least squares (IIRLS) algorithms are proposed, and their convergence and convergence rate are analyzed. The local convergence of our algorithms is superlinear and approaches a quadratic rate in special cases. Finally, a large number of algorithms are compared in solving the sparse recovery problem, including IRLS methods and IIRLS methods with different weighting parameters and regularization parameters, and certain iterative methods. The experimental results demonstrate that the proposed methods are efficient and promising.
Path tracking control for autonomous vehicles with saturated input: A fuzzy fixed‐time learning control approach
Authors: Zhang Xinrong , Wang Ying , Yang Zeyu , Huang Jin , Su Yanzhao 
Published: January 2022

AbstractThis paper presents a fuzzy fixed‐time learning path tracking control strategy for autonomous vehicles with saturated input and uncertainties. First, Takagi‐Sugeno (T‐S) model is designed to realize an accurate description of the nonlinear path tracking systems. The T‐S model is the weighted sum of a series of linear dynamics models. The weighting coefficients are described by fuzzy membership functions. Then, with the consideration of the saturated input, a fixed‐time learning control is proposed. It contains a learning law to estimate the uncertainties of the system on‐line. The fixed‐time convergence and the robustness properties are analyzed through Lyapunov stability theory. Finally, the effectiveness of the proposed control method has been verified through the CarSim/Simulink co‐simulations under different driving conditions. The results demonstrate that the developed controller significantly improves the performance of path tracking and follows the desired path well even in the case of parameter uncertainties and external disturbances.
Development of an environmentally friendly nanoemulsion based on Ginkgo biloba exocarp extracts to control Plutella xylostella
Authors: Zeng Liya , Wang Zhe 
Published: January 2022

AbstractThe chemical compositions of Ginkgo biloba exocarp extracts (GBEE) and leaf extracts are similar, however, studies describing the development of GBEE biopesticides are few. In this study, the authors investigated the preparation of GBEE nanoemulsionand and characterized by transmittance, physical stability, droplet size and size distribution for the first time. Insecticidal activity and lipophilicity screening of four different solvents indicated ethyl acetate was satisfactory. Based on dispersibility, centrifugation, heating‐cooling cycle, cloud point and long‐term stability experiments, two formulations (ethyl acetate/Tween 40‐Span 60 (9:1)/water and ethyl acetate/Tween 60‐Span 60 (9:1)/water) were optimum to formulate nanoemulsions. However, the smallest droplet size and size distribution (10.93 ± 0.16 nm, PDI = 0.15 ± 0.01) was obtained using the Tween 60/Span 60 combination. The insecticidal activity of GBEE nanoemulsion was evaluated against the third instar larvae of Plutella xylostella. Lethal concentration (LC50) values of the optimized nanoemulsion were 127.38 mg/L at 12 h and 72.80 mg/L at 24 h, respectively. This indicated that GBEE nanoemulsion had higher insecticidal activity than the GBEE. The results proposed that the GBEE nanoemulsion is a potential and effective natural alternative for the management of P. xylostella.
A super transformed nested array with reduced mutual coupling for direction of arrival estimation of non‐circular signals
Authors: Mei Fengtong , Xu Haiyun , Cui WeiJia , Jian Chunxiao , Zhang Jian 
Published: January 2022

AbstractRecently, sparse linear arrays have aroused significant attention because they can provide increased degrees of freedom (DOFs) and enlarged inter‐element spacing, which are the critical factors to improve the accuracy of direction of arrival (DOA) estimation. In this paper, to alleviate the high mutual coupling caused by the dense part of transformed nested arrays (TNAs), we present a super transformed nested array (STNA) for the DOA estimation of non‐circular signals. It can be obtained by removing some sensors from the dense part of transformed nested arrays and relocating them appropriately. The proposed array structure possesses a higher DOF and a sparser physical structure, resulting in less mutual coupling compared to TNA. For the proposed array structure, we provide theoretical proof of the DOFs and deduce the weight functions. Numerical simulations are conducted to demonstrate the advantages of the STNA over existing sparse arrays.
The evolution of temperature and density structures of OB cluster-forming molecular clumps
Authors: Lin Y. , Wyrowski F. , Liu H. B. , Izquierdo A. F. , Csengeri T. , Leurini S. , Menten K. M. 
Published: January 2022

Context. OB star clusters originate from parsec-scale massive molecular clumps, while individual stars may form in ≲0.1 pc scale dense cores. The thermal properties of the clump gas are key factors governing the fragmentation process, and are closely affected by gas dynamics and feedback of forming stars.
Aims. We aim to understand the evolution of temperature and density structures on the intermediate-scale (≲0.1–1 pc) extended gas of massive clumps. This gas mass reservoir is critical for the formation of OB clusters, due to their extended inflow activities and intense thermal feedback during and after formation.
Methods. We performed ~0.1 pc resolution observations of multiple molecular line tracers (e.g., CH3CCH, H2CS, CH3CN, CH3OH) that cover a wide range of excitation conditions, toward a sample of eight massive clumps. The sample covers different stages of evolution, and includes infrared-weak clumps and sources that are already hosting an HII region, spanning a wide luminosity-to-mass ratio (L∕M) range from ~1 to ~100 (L⊙/M⊙). Based on various radiative transfer models, we constrain the gas temperature and density structures and establish an evolutionary picture, aided by a spatially dependent virial analysis and abundance ratios of multiple species.
Results. We determine temperature profiles varying in the range 30–200 K over a continuous scale, from the center of the clumps out to 0.3–0.4 pc radii. The clumps’ radial gas density profiles, described by radial power laws with slopes between −0.6 and ~−1.5, are steeper for more evolved sources, as suggested by results based on dust continuum, representing the bulk of the gas (~104 cm−3), and on CH3OH lines probing the dense gas (≳106–108 cm−3) regime. The density contrast between the dense gas and the bulk gas increases with evolution, and may be indicative of spatially and temporally varying star formation efficiencies. The radial profiles of the virial parameter show a global variation toward a sub-virial state as the clump evolves. The linewidths probed by multiple tracers decline with increasing radius around the central core region and increase in the outer envelope, with a slope shallower than the case of the supersonic turbulence (σv ∝ r0.5) and the subsonic Kolmogorov scaling (σv ∝ r0.33). In the context of evolutionary indicators for massive clumps, we also find that the abundance ratios of [CCH]/[CH3OH] and [CH3CN]/[CH3OH] show correlations with clump L∕M.
Redshifted methanol absorption tracing infall motions of high-mass star formation regions
Authors: Yang W. J. , Menten K. M. , Yang A. Y. , Wyrowski F. , Gong Y. , Ellingsen S. P. , Henkel C. , Chen X. , Xu Y. 
Published: January 2022

Context. Gravitational collapse is one of the most important processes in high-mass star formation. Compared with the classic blue-skewed profiles, redshifted absorption against continuum emission is a more reliable method to detect inward motions within high-mass star formation regions.
Aims. We aim to test if methanol transitions can be used to trace infall motions within high-mass star formation regions.
Methods. Using the Effelsberg-100 m, IRAM-30 m, and APEX-12 m telescopes, we carried out observations of 37 and 16 methanol transitions towards two well-known collapsing dense clumps, W31C (G10.6−0.4) and W3(OH), to search for redshifted absorption features or inverse P-Cygni profiles.
Results. Redshifted absorption is observed in 14 and 11 methanol transitions towards W31C and W3(OH), respectively. The infall velocities fitted from a simple two-layer model agree with previously reported values derived from other tracers, suggesting that redshifted methanol absorption is a reliable tracer of infall motions within high-mass star formation regions. Our observations indicate the presence of large-scale inward motions, and the mass infall rates are roughly estimated to be ≳10−3 M⊙ yr−1, which supports the global hierarchical collapse and clump-fed scenario.
Conclusions. With the aid of bright continuum sources and the overcooling of methanol transitions leading to enhanced absorption, redshifted methanol absorption can trace infall motions within high-mass star formation regions hosting bright H II regions.
Direct Costs of Healthcare for Children with Type 1 Diabetes Using a
CGM System: A Health Economic Analysis of the VIDIKI Telemedicine Study in a
German Setting
Authors: Frielitz Fabian Simon , Eisemann Nora , Werner Kristin , Hiort Olaf , Katalinic Alexander , Lange Karin , von Sengbusch Simone 
Published: January 2022

Abstract
Aims The Virtual Diabetes Outpatient Clinic for Children and Adolescents
(VIDIKI) study was a 6-month quasi-randomized, multicentre study followed by an
extension phase to evaluate the effects of monthly video consultations in
addition to regular care. A health economic analysis was conducted to assess the
direct costs.
Methods The cost data of 240 study participants (1–16 years of
age) with type 1 diabetes who were already using a continuous glucose monitoring
system were collected in the first 6 months of the study. The intervention group
(IG) received monthly video consultations plus regular care, and the waiting
control group (WG) received only regular care. Cost data were collected for a
comparable anonymized group of children from the participating health insurance
companies during the 6-month period before the study started (aggregated data
group [AG]).
Results Cost data were analysed for the AG (N=840) 6 months before
study initiation and those for the study participants
(N=225/240). Hospital treatment was the highest cost category in
the AG. There was a cost shift and cost increase in the IG and WG, whereby
diabetes supplies were the highest cost category. The mean direct
diabetes-associated 6-month costs were € 4,702 (IG) and € 4,936
(WG).
Conclusion The cost development within the cost collection period over two
years possibly reflects the switch to higher-priced medical supplies. Video
consultation as an add-on service resulted in a small but nonsignificant
reduction in the overall costs.
Copper(I) Iodide Promoted [3+2]-Cycloaddition/Oxidation to Construct Pyrrolo[2,1-a]isoquinolinoquinones from Naphthoquinones and Tetrahydroisoquinolines
Authors: Li Yujin , Yu Zihua , Tang Xue , Huang Chenxi , Shang Yehan , Ye Qing , Han Liang 
Published: January 2022

AbstractA copper-catalyzed, three-component, one-pot, 1,3-dipole cycloaddition/oxidation has been developed to construct pyrrolo[2,1-a]isoquinolinoquinone derivatives, with environmentally friendly oxygen as the oxidant. The pyrrolo[2,1-a]isoquinolinoquinone products were obtained from naturally available tetrahydroisoquinolines, 1,4-naphthoquinones, and benzaldehydes in medium yields.
Using the Casper Stent in Carotid Angioplasty: A Single Center Experience
Authors: Haas Leandro José , Przysiezny Bernardo , Scramocin Thaize Regina , Marques Natalia Tozzi , Tutida Leticia Saori , Sarmento Marina Piquet , Omar Omar Ahmad , Borille Thais Moura , Staedele Guilherme Voltolini , Camilo Liz Caroline de Oliveira , Domingos João Pedro Latronico , Zimmermann Amanda Cristina , Giustina Evelyn Della 
Published: January 2022

Abstract
Objectives To establish the success rate in endovascular internal carotid artery (ICA) stenosis recanalization using the double-layer stent Casper-RX (Microvention, Inc 35 Enterprise, Aliso Viejo, California, United States of America) and to identify the main comorbidities in individuals with ICA stenosis, morphological characteristics of the stenosis, diagnostic methods, intraoperative complications, as well as morbidity and mortality within 30 days of the surgical procedure.
Materials and Methods Retrospective analysis of 116 patients undergoing ICA angioplasty with a degree of stenosis ≥ 70% using Casper-RX stenting who underwent this procedure from April 2015 to December 2019.
Results Technical success was achieved in 99.1% of the patients. Three of them had postprocedural complications: one transient ischemic attack (TIA) and two puncture site hematomas. A cerebral protection filter was not used in only two procedures, as these consisted of dissection of the carotid. There was satisfactory recanalization and adequate accommodation of the stents in the previously stenosed arteries, with no restenosis in 99.4% of the cases.
Conclusion The endovascular treatment of extracranial carotid stenoses using the Casper-RX stent showed good applicability and efficacy. Although only two cases of thromboembolic complications occurred during the procedure, further investigation and studies on the effectiveness of this new device are needed.
Factors Associated with Pediatric In-Hospital Recurrent Cardiac Arrest
Authors: Brown Stephanie R. , Roberts Joan S. , Killien Elizabeth Y. , Brogan Thomas V. , Farris Reid , Di Gennaro Jane L. , Barreto Jessica , McMullan D. Michael , Weiss Noel S. 
Published: January 2022

AbstractThe objective of this article was to identify demographic and clinical factors associated with early recurrent arrest (RA; <48 hours) and late RA (≥48 hours) among pediatric inpatients following an initial in-hospital cardiac arrest. A retrospective cohort study of inpatients was performed in a free-standing academic quaternary care children's hospital. All inpatients were <18 years old with a cardiac arrest event requiring ≥1 minute of cardiopulmonary resuscitation with the return of spontaneous circulation sustained for ≥20 minutes at Seattle Children's Hospital from February 1, 2012, to September 18, 2019. Of the 237 included patients, 20 (8%) patients had an early RA and 30 (13%) had a late RA. Older age and severe prearrest acidosis were associated with a higher risk of early RA, odds ratios (OR) = 1.2 (95% confidence interval [CI]: 1.1–1.3) per additional year and 4.6 (95% CI: 1.2–18.1), respectively. Prearrest organ dysfunction was also associated with a higher risk of early RA with an OR of 3.3 (95% CI: 1.1–9.4) for respiratory dysfunction, OR = 1.4 (95% CI: 1.1–1.9) for each additional dysfunctional organ system, and OR = 1.1 (95% CI: 1–1.2) for every one-point increase in PELOD2 score. The neonatal illness category was associated with a lower risk of late RA, OR 0.3 (95% CI: 0.1–0.97), and severe postarrest acidosis was associated with a higher risk of late RA, OR = 4.2 (95% CI: 1.1–15). Several demographic and clinical factors offer some ability to identify children who sustain a recurrent cardiac arrest, offering a potential opportunity for intervention to prevent early recurrent arrest.
Amplification of pulsed light with arbitrary frequency chirps on nanosecond timescales
Authors: Clarke B. S. , Gould P. L. 
Published: January 2022

We have developed a system for producing amplified pulses of frequency-chirped light at 780 nm on nanosecond timescales. The system starts with tunable cw laser light and employs a pair of fiber-based phase modulators, a semiconductor optical amplifier, and a tapered amplifier to achieve chirp rates exceeding 3 GHz/10 ns and peak powers greater than 1 W. Driving the modulators with an arbitrary waveform generator enables arbitrary chirp shapes, such as two-frequency linear chirps. We overcome the optical power limitations of the modulators by duty cycling and avoid unseeded operation of the tapered amplifier by multiplexing the chirped pulses with “dummy” light from a separate diode laser.
Overload performance study and fabrication of the capacitive pressure-sensitive chip with linkage film
Authors: Chuai Rongyan , Yang Yuxin , Zhang Bing , Jiang Guimin , Zhang He 
Published: January 2022

In order to satisfy the demands of pressure measurement under high overload conditions, the overload characteristics of the capacitive pressure-sensitive chip with linkage film are studied. Through the simulation and analysis for the stress distribution of this sensitive structure and in light of the dimension effect of the tensile strength of monocrystalline silicon, the influence of sizes of the sensitive structure on the overload pressure is expounded. The simulated results illustrate that the maximum overload pressure can exceed 200 times the full-scale (FS) when appropriately adjusting the sizes of the sensitive structure. The proposed chip is fabricated using SOI wafers combined with bonding technology. Our experimental results show that the sample chip has a linear response in the pressure range of 25–100 kPa, and its overload pressure is 4.5 MPa, reaching 45 times the full-scale.
Dynamical phenomena connected with stability loss of equilibria and periodic trajectories
Authors: Neishtadt A. I. , Treschev D. V. 
Published: January 2022

Abstract
This is a study of a dynamical system depending on a parameter

. Under the assumption that the system has a family of equilibrium positions or periodic trajectories smoothly depending on

, the focus is on details of stability loss through various bifurcations (Poincaré–Andronov– Hopf, period-doubling, and so on). Two basic formulations of the problem are considered. In the first,

is constant and the subject of the analysis is the phenomenon of a soft or hard loss of stability. In the second,

varies slowly with time (the case of a dynamic bifurcation). In the simplest situation

, where

is a small parameter. More generally,

may be a solution of a slow differential equation. In the case of a dynamic bifurcation the analysis is mainly focused around the phenomenon of stability loss delay.
Bibliography: 88 titles.
One-dimensional dynamical systems
Authors: Efremova L. S. , Makhrova E. N. 
Published: January 2022

Abstract
The survey is devoted to the topological dynamics of maps defined on one-dimensional continua such as a closed interval, a circle, finite graphs (for instance, finite trees), or dendrites (locally connected continua without subsets homeomorphic to a circle). Connections between the periodic behaviour of trajectories, the existence of a horseshoe and homoclinic trajectories, and the positivity of topological entropy are investigated. Necessary and sufficient conditions for entropy chaos in continuous maps of an interval, a circle, or a finite graph, and sufficient conditions for entropy chaos in continuous maps of dendrites are presented. Reasons for similarities and differences between the properties of maps defined on the continua under consideration are analyzed. Extensions of Sharkovsky’s theorem to certain discontinuous maps of a line or an interval and continuous maps on a plane are considered.
Bibliography: 207 titles.
Unlocking adults’ implicit statistical learning by cognitive depletion
Authors: Smalle Eleonore H. M. , Daikoku Tatsuya , Szmalec Arnaud , Duyck Wouter , Möttönen Riikka 
Published: January 2022

SignificanceStatistical learning mechanisms enable extraction of patterns in the environment from infancy to adulthood. For example, they enable segmentation of continuous speech streams into novel words. Adults typically become aware of the hidden words even when passively listening to speech streams. It remains poorly understood how cognitive development and brain maturation affect implicit statistical learning (i.e., infant-like learning without awareness). Here, we show that the depletion of the cognitive control system by noninvasive brain stimulation or by demanding cognitive tasks boosts adults’ implicit but not explicit word-segmentation abilities. These findings suggest that the adult cognitive architecture constrains statistical learning mechanisms that are likely to contribute to early language acquisition and opens avenues to enhance language-learning abilities in adults.