bluuebunny/crossref_metadata_2025_split huggingface dataset:
Accuracy Analysis of Timing Comparison for BDS-3 and GPS Based on Satellite Common View Algorithm
Authors: Zhou Mingduan , Ji Xu , Zhang Muyuan , Tian Ye , Shang Leyi 
Published: December 2022

Abstract
With the networking completion of the Beidou navigation satellite system (BDS-3), the BDS-3 system was opened in the whole world on July 31, 2020. It is important practical significance to analyze the performance of the BDS-3 system and the GPS in terms of satellite common view timing comparison. In order to analyze the accuracy of timing comparison for BDS-3/GPS global navigation satellite system common view time, the comparison experimental of BDS-3/GPS with medium and long baseline is carried out based on satellite common view algorithm by using the National Metrology benchmark system of atomic time scale maintained by National Institute of Metrology (NIM), China. The timing model and algorithm of the BDS-3/GPS satellite common view algorithm are deduced in detail, and the stability of receiver clock difference and accuracy analysis of timing comparison for the BDS-3/GPS based on the satellite common view algorithm are compared and analyzed. The experimental results show that the stability of receiver clock difference of BDS-3 and GPS is respectively ns-level, but the stability of receiver clock difference of BDS-3 system is slightly better than that of GPS; the accuracy analysis of timing comparison for BDS-3 and GPS based on satellite common view algorithm is respectively better than 24 ns, but the accuracy analysis of timing comparison for BDS-3 system is slightly better than that of the GPS.
Based on Wavelet Threshold Denoising-LDA and Bilstm Aircraft Engine Life Prediction
Authors: Li Honglin , Wang Jiaxi 
Published: December 2022

Abstract
Turbine engines operate in extreme environments and require regular maintenance and replacement. It leads to a lot of human and financial investment, and once the aircraft fails during the navigation process, it will cause irreparable losses. Therefore, it is very necessary to propose an engine life prediction model, which can intervene manually before the engine fails, thereby reducing the probability of an air accident. In order to solve the problem, this paper proposes a wavelet threshold denoising-LDA and Bilstm aero-engine life prediction method, and uses the C-MAPSS data set for simulation prediction. Based on this data set, this paper firstly carried out wavelet threshold denoising to the data set to remove noise, and then used LDA to reduce the dimension to screen out the main features. The processed features are input into the bidirectional LSTM network for prediction. By training the above preprocessed data, BIlstm has better adaptability than the convolutional neural network CNN and LSTM, and the prediction error is greatly reduced.
Optimal Numbers and Mix of SSA Drones and Radio Repeater Drones based on Ant Colony Algorithm
Authors: Yu Shu , Wang Haiying , Zheng Luo 
Published: December 2022

Abstract
During the 2019-2020 fire season in Australia, there were destructive wildfires in every state, particularly in Victoria. Therefore, we are required to build a model to deploy drones to surveil the fire. We develop the basic model to find out the optimal numbers and mix of SSA drones and radio repeater drones. First, we use Ant Colony Algorithm to solve the shortest path, which could make the government purchase as few drones as possible under the premise of covering a large area. According to the operating mode of UVA and the theory of UAV formation cooperative control, we find out the information state of the radio repeater and its cruise path length. Besides, we create a fire risk assessment to determine the speed of information updates and adjust the number of drones. Finally, we determine the optimal combination of 1260 SSA drones and 151 repeater drones.
Research the SDRAM Controller Based on FPGA
Authors: Gao Jinggang , Gao Yunxia 
Published: December 2022

Abstract
A global SDRAM controller was designed based on FPGA. The major components of the controller include the interface control module, the command generation module, the data path module, and the source program simulation using Quartus II. From the simulation results, the soft core of the SDRAM controller could complete the mode setting, normal R/W operation, and auto-refresh function. It could easily meet different needs by simple modification, and it is much more flexible and programmable.
Nonuniform ISRJ suppression based on time shift alignment and morphological processing
Authors: Zhang Haiqing , Zhu Yongfeng , Feng Jiamei , Fu Qiang 
Published: December 2022

Abstract
Non-uniform interrupted-Sampling Repeater Jamming is a coherent interference technology based on the principle of undersampling, and it has a salient feature over several uniform interferences in terms of pseudo-randomness, which makes it more difficult for radar to detect real targets. Aiming at the target detection problem of non-uniform interrupted-sampling repeater jamming, a method for radar based on time-frequency domain interference suppression is proposed in this paper. Firstly, according to the short-term Fourier transform strategy, the echo signal is converted to the time-frequency domain, and then we select one of the columns in the time-frequency matrix as the reference column for translating the signal perpendicular to the timeline. Furthermore, the interference distribution area is accurately extracted and filtered out according to the morphological processing. Finally, the simulation results prove that the proposed algorithms have an advantage over non-uniform interrupted-sampling repeater jamming in terms of interference suppression.
Data Augmentation Based on Contrastive Learning in Audio Anomaly Detection
Authors: Li Jiajia 
Published: December 2022

Abstract
Based on the contrastive supervised learning algorithm, this paper studies the impact of the linear combination of data augmentation in audio anomaly detection. Previous studies have shown that the linear combination of data enhancement performs well in image detection. However, there are few studies on similar methods in sound anomaly detection, and this study makes up for this gap. We apply transformations to one branch of the algorithm with the audio augmentation module of the AugLy library, and the other branch is directly transformed into the Mel spectrogram. We find that more data augmentation patterns can help neural networks learn more high-quality representations, and a suitable linear data combination augmentation can improve the performance of model generalization at a low cost. The combination effect of Add Background Noise + Pitch Shift is the best. The AUC index of the fan dataset is increased by 10.06% on average, and other datasets are also improved to varying degrees.
Gait Simulation Research of 2-DOF Lower Limb Rehabilitation Robot Based on ADAMS and MATLAB
Authors: Yang Yalong , Wang Jirong , Shi Lianwen , Li Jun 
Published: December 2022

AbstractThe two-degree-of-freedom (2-DOF) lower limb rehabilitation robot is developed to promote the functional recovery of hemiplegic patients. In order to improve the gait movement and shorten the development cycle, co-simulation technology is used to simulate and analyze the lower limb rehabilitation robot. ADAMS simulation software is used to model and analyze the dynamics of the robot and the MATLAB/Simulink module is used to build a PID control system to track the gait of the robot. In ADAMS dynamic simulation, the model walks according to the target trajectory, which verifies the correctness of the virtual prototype. In ADAMS and MATLAB co-simulation, the model follows the target trajectory to complete the gait. The trajectory tracking error was less than 1°.
Test-beam and simulation studies towards RPWELL-based DHCAL
Authors: Shaked-Renous D. , Amaro F.D. , Bhattacharya P. , Breskin A. , Chefdeville M. , Drancourt C. , Geralis T. , Karyotakis Y. , Moleri L. , Tesi A. , Titov M. , Veloso J. , Vouters G. , Bressler S. 
Published: December 2022

Abstract
Digital Hadronic Calorimeters (DHCAL) were suggested for future Colliders as part of the particle-flow concept. Though studied mainly with RPC, studies focusing on sampling elements based on Micro-Pattern Gaseous Detector have shown the potential advantages; they can be operated with environment-friendly gases and reach similar detection efficiency at lower average pad multiplicity. We summarize here the experimental test-beam results of a small-size DHCAL prototype, incorporating six Micromegas and two RPWELL sampling elements, interlaced with steel-absorber plates. It was investigated with 2–6 GeV pion beams at the CERN/PS beam facility. The data permitted validating a GEANT4 simulation framework of a DHCAL, and evaluating the expected pion energy resolution of a full-scale RPWELL-based calorimeter. The pion energy resolution derived for the RPWELL concept is competitive to that of glass RPC and Micromegas sampling techniques.
Effective Gain and Ion Back Flow study of triple and quadruple GEM detector
Authors: Greene Senta V. , Velkovska Julia , Blankenship Brandon , Reynolds Michael Z. , Tarafdar Sourav 
Published: December 2022

Abstract
Gas electron Multipliers (GEM) are a new generation of
gaseous avalanche devices in the Micro Pattern Gaseous Detector
(MPGD) category. GEMs are widely used in both nuclear and high
energy experiments as well as in medical science. Several parameters
define the performance of these types of devices under various
experimental conditions. This article focuses on the study of
effective gain and Ion Back Flow (IBF) in both triple and quadruple
GEM detectors. Effective gain and IBF are two of the most important
parameters in determining the performance of GEM detectors.
Exact calculation of the mean first-passage time of continuous-time random walks by nonhomogeneous Wiener–Hopf integral equations
Authors: Dahlenburg M , Pagnini G 
Published: December 2022

AbstractWe study the mean first-passage time (MFPT) for asymmetric continuous-time random walks in continuous-space characterised by waiting-times with finite mean and by jump-sizes with both finite mean and finite variance. In the asymptotic limit, this well-controlled process is governed by an advection-diffusion equation and the MFPT results to be finite when the advecting velocity is in the direction of the boundary. We derive a nonhomogeneous Wiener–Hopf integral equation that allows for the exact calculation of the MFPT by avoiding asymptotic limits and it emerges to depend on the whole distribution of the jump-sizes and on the mean-value only of the waiting-times, thus it holds for general non-Markovian random walks. Through the case study of a quite general family of asymmetric distributions of the jump-sizes that is exponential towards the boundary and arbitrary in the opposite direction, we show that the MFPT is indeed independent of the jump-sizes distribution in the opposite direction to the boundary. Moreover, we show also that there exists a length-scale, which depends only on the features of the distribution of jumps in the direction of the boundary, such that for starting points near the boundary the MFPT depends on the specific whole distribution of jump-sizes, in opposition to the universality emerging for starting points far-away from the boundary.
Physiological responses of several beef cattle breeds based on environmental conditions in Beef Cattle Research Station
Authors: Irmawanti S , Luthfi M , Prihandini P W 
Published: December 2022

Abstract
Physiological conditions were one factors that can affect the growth of cattle. The study aimed to determine the physiological responses of several beef cattle breeds that are reared in Beef Cattle Research Station (BCRS), Grati District, Pasuruan Regency, East Java Indonesia, was carried out by measure temperature, humidity, Temperature Humidity Index (THI), rectal temperature, respiration frequency, body temperature, Head Tolerance Coefficient (HTC) and heart rate of 159 cows consisting of Bali, Madura, Jabres, Galekan, Rambon, Peranakan Ongole (PO), Belgian Blue x PO cross, PO x Bali cross (POBA) which were observed during 4 months in pens. Data were analysed descriptively. The result of the study were ambient temperature and relative humidity of the pen ranged from 25-34.12°C and 54.88-84.27%, THI ranged from 74.92-84.97, body temperature ranged from 35.06-38.53°C, respiration frequency ranged from 20-54 times/minute, HTC ranged from 1.81-3.34, and heart rate ranged from 65-92 times/minute. It was concluded that several breeds of beef cattle in BCRS have mild to severe heat stress, high heat tolerance, respiration rate and heart rate. This condition does not cause production problem in several beef cattle, but in BB x PO cross it has potential to low productivity.
Is a State Bank A Useful Economic Development Tool in the USA?
Authors: Chirinko Robert S 
Published: December 2022

AbstractThe possibility of creating a state bank has received much recent attention in the USA. In 2021, six states introduced legislation to create a state bank; in 2019, similar legislation was enacted in California for municipal banks. This article develops a framework to evaluate state banking, reviews prior experiences with state banking and related alternatives to traditional private banking, and identifies five questions determining the advisability of creating a state bank. The overall goal is to shed some light on whether a state bank can be a useful tool to further state economic development and the welfare of state residents (JEL codes: G21 (banks), G28 (government policy, financial institutions), and H70 (state and local governments)).
The chromosome-scale genome of Kobresia myosuroides sheds light on karyotype evolution and recent diversification of a dominant herb group on the Qinghai-Tibet Plateau
Authors: Ning Yu , Li Yang , Dong Shu Bin , Yang Hong Guo , Li Chun Yi , Xiong Biao , Yang Jun , Hu Yu Kun , Mu Xian Yun , Xia Xiao Fei 
Published: December 2022

Abstract
Kobresia species are common in meadows on the Qinghai–Tibet Plateau. They are important food resources for local livestock, and serve a critical foundation for ecosystem integration. Genetic resources of Kobresia species are scarce. Here, we generated a chromosome-level genome assembly for K. myosuroides (Cyperaceae), using PacBio long-reads, Illumina short-reads, and Hi–C technology. The final assembly had a total size of 399.9 Mb with a contig N50 value of 11.9 Mb. The Hi–C result supported a 29 pseudomolecules model which was in consistent with cytological results. A total of 185.5 Mb (44.89% of the genome) transposable elements were detected, and 26,748 protein-coding genes were predicted. Comparative analysis revealed that Kobresia plants have experienced recent diversification events during the late Miocene to Pliocene. Karyotypes analysis indicated that the fission and fusion of chromosomes have been a major driver of speciation, which complied with the lack of whole-genome duplication (WGD) in K. myosuroides genome. Generally, this high-quality reference genome provides insights into the evolution of alpine sedges, and may be helpful to endemic forage improvement and alpine ecosystem preservation.
Karyotype evolution of the Asterids insights from the first genome sequences of the family Cornaceae
Authors: Dong Congcong , Wang Shang , Zhang Han , Liu Jianquan , Li Minjie 
Published: December 2022

AbstractCornaceae is a core representative family in Cornales, the earliest branching lineage in the Asterids on the life tree of angiosperms. This family includes the only genus Cornus, a group of ~55 species. These species occur widely in Northern Hemisphere and have been used as resources for horticultural ornaments, medicinal and industrial manufacturing. However, no any genome sequences are available for this family. Here, we reported a chromosome­level genome for Cornus controversa. This was generated using high-fidelity plus Hi–C sequencing, and totally ~771.80 Mb assembled sequences and 39,886 protein-coding genes were obtained. We provided evidence for a whole-genome duplication event (WGD) unique to C. controversa. The evolutionary features of this genome indicated that the expanded and unique genes might have contributed to response to stress, stimulus and defense. By using chromosome-level syntenic blocks shared between eight living genomes, we found high degrees of genomic diversification from the ancestral core-eudicot genome to the present-day genomes, suggesting an important role of WGD in genomic plasticity that leads to speciation and diversification. These results provide foundational insights on the evolutionary history of Cornaceae, as well as on the Asterids diversification.
Temporal resolution in transmission electron microscopy using a photoemission electron source
Authors: Kuwahara Makoto , Agemura Toshihide 
Published: December 2022

AbstractTemporal resolution in transmission electron microscopy (TEM) has progressed to the sub-picosecond level with the stroboscopic method using a photoemission mechanism with an ultrafast laser for the electron gun. Time-resolved TEM in conjunction with a photocathode (PC)-type electron source pumped by a pulsed laser has been actively developed to exceed sub-nanosecond time resolution. Here, we provide an overview of the trends in this field and discuss the measurement targets that can be obtained by time-resolved measurements. Furthermore, we consider the types and characteristics of PC materials and their related physical quantities for evaluation of electron beam properties. Experimental results obtained by time-resolved TEM using a semiconductor PC that has a surface with a negative electron affinity are presented, and application results based on quantum mechanics are given. We also describe new techniques for improving the time resolution and new applications of pulsed electron beams in electron microscopy and discuss the measurement targets that are expected for time-resolved electron microscopy.
CONSTANS-LIKE 1a positively regulates salt and drought tolerance in soybean
Authors: Xu Chongjing , Shan Jinming , Liu Tianmeng , Wang Qi , Ji Yujia , Zhang Yuntong , Wang Mengyuan , Xia Ning , Zhao Lin 
Published: December 2022

AbstractSalt and drought stresses are major factors limiting soybean (Glycine max [L.] Merr.) growth and development; thus, improving soybean stress tolerance is critical. In this study, both salt stress and drought stress induced mRNA levels of CONSTANS-like 1a (GmCOL1a) and stabilized the GmCOL1a protein. Transgenic 35S:GmCOL1a soybean plants exhibited enhanced salt and drought tolerance, with higher relative water content in leaves, greater proline content, lower malondialdehyde (MDA) content, and less reactive oxygen species (ROS) production compared with wild-type plants; the GmCOL1a knockout co-9 mutant showed opposite phenotypes. In addition, GmCOL1a promoted the expression of genes related to salt tolerance, effectively reducing the Na+/K+ ratio in soybean plants, especially in stems and leaves of 35S:GmCOL1a soybean. Chromatin immunoprecipitation sequencing (ChIP-seq) analysis identified two potential direct targets of GmCOL1a, late embryogenesis abundant (GmLEA) and Δ1-pyrroline-5-carboxylate synthetase (GmP5CS) genes, which were verified by chromatin immunoprecipitation quantitative polymerase chain reaction (ChIP-qPCR), electrophoretic mobility shift assay (EMSA), and transient transcriptional activation assays. GmCOL1a bound directly to the Myc(bHLH)-binding and Che-binding motifs of GmLEA and GmP5CS promoters to stimulate mRNA expression. Analysis of transgenic hairy-root GmP5CS:GmP5CS soybean plants in wild type, co-9, and 35S:GmCOL1a backgrounds further revealed that GmCOL1a enhances salt and drought tolerance by promoting GmP5CS protein accumulation in transgenic soybean hairy roots. Therefore, we demonstrate that GmCOL1a plays an important role in tolerance to abiotic stress in soybean.
Topological states in one-dimensional 𝒫𝒯-symmetric non-Hermitian spin-orbit-coupled Su–Schrieffer–Heeger lattices
Authors: Li Jia-Rui , Wang Zi-An , Xu Tong-Tong , Zhang Lian-Lian , Gong Wei-Jiang 
Published: December 2022

Abstract
Energy and topological-state properties of the one-dimensional non-Hermitian spin-orbit-coupled Su–Schrieffer–Heeger lattice are theoretically investigated by introducing spin-dependent onsite imaginary potentials with gain and loss. It is found that imaginary potentials lead to the appearance of imaginary energies in the topologically nontrivial phase region, and ${\cal {PT}}$ phase transition occurs in the topologically trivial region. In addition, the imaginary potentials and spin–orbit coupling act together to make the topological phase transition occur in the topologically trivial region, and the topologically nontrivial region becomes wider. The energy spectrum results show that imaginary potentials and spin–orbit coupling have obvious effects on the zero-energy edge states of this system, which mainly lie in the presence of four types of zero-energy states with different localization and numbers. Furthermore, we discuss diagonal disorder and the transport behavior of system, further characterizing the properties of the individual topological states. The above results indicate the special adjustment effect of imaginary potentials and spin–orbit coupling on the band structure of such a system.
Effects of nuclear matter and composition in core-collapse supernovae and long-term proto-neutron star cooling
Authors: Sumiyoshi Kohsuke , Furusawa Shun , Nagakura Hiroki , Harada Akira , Togashi Hajime , Nakazato Ken’ichiro , Suzuki Hideyuki 
Published: December 2022

Abstract
We study the influence of hot and dense matter in core-collapse supernovae by adopting an up-to-date nuclear equation of state (EOS) based on the microscopic nuclear many-body frameworks. We explore effects of the EOS based on the Dirac–Brückner–Hartree–Fock theory through comparisons with those based on the variational method. We also examine effects of the differences in the composition of nuclei and nucleons by using the same EOS as the variational method but employing two different treatments in computations of nuclear abundances. We perform numerical simulations of core-collapse supernovae adopting the three EOSs. We also perform numerical simulations of the long-term evolution over 70 s of the proto-neutron star cooling. We show that the impacts of different modeling of the composition are remarkable as in those due to different treatments of uniform matter in the gravitational collapse, bounce and shock propagation. The cooling of a proto-neutron star and the resulting neutrino emission are also affected by the compositional difference even if the same treatment is used in computing uniform matter of the EOS.
Real tensor eigenvalue/vector distributions of the Gaussian tensor model via a four-fermi theory
Authors: Sasakura Naoki 
Published: December 2022

Abstract
Eigenvalue distributions are important dynamic quantities in matrix models, and it is an interesting challenge to study corresponding quantities in tensor models. We study real tensor eigenvalue/vector distributions for real symmetric order-three random tensors with a Gaussian distribution as the simplest case. We first rewrite this problem as the computation of a partition function of a four-fermi theory with R replicated fermions. The partition function is exactly computed for some small-N,R cases, and is shown to precisely agree with Monte Carlo simulations. For large-N, it seems difficult to compute it exactly, and we apply an approximation using a self-consistency equation for two-point functions and obtain an analytic expression. It turns out that the real tensor eigenvalue distribution obtained by taking R = 1/2 is simply the Gaussian within this approximation. We compare the approximate expression with Monte Carlo simulations, and find that, if an extra overall factor depending on N is multiplied to the the expression, it agrees well with the Monte Carlo results. It is left for future study to improve the approximation for large-N to correctly derive the overall factor.