bluuebunny/crossref_metadata_2025_split huggingface dataset:
HHL Analysis and Simulation Verification Based on Origin Quantum Platform
Authors: Liu Xiaonan , Jing Lina , Han Lin , Gao Jie 
Published: December 2021

Abstract
Solving large-scale linear equations is of great significance in many engineering fields, such as weather forecasting and bioengineering. The classical computer solves the linear equations, no matter adopting the elimination method or Kramer’s rule, the time required for solving is in a polynomial relationship with the scale of the equation system. With the advent of the era of big data, the integration of transistors is getting higher and higher. When the size of transistors is close to the order of electron diameter, quantum tunneling will occur, and Moore’s Law will not be followed. Therefore, the traditional computing model will not be able to meet the demand. In this paper, through an in-depth study of the classic HHL algorithm, a small-scale quantum circuit model is proposed to solve a 2×2 linear equations, and the circuit diagram and programming are used to simulate and verify on the Origin Quantum Platform. The fidelity under different parameter values reaches more than 90%. For the case where the matrix to be solved is a sparse matrix, the quantum algorithm has an exponential speed improvement over the best known classical algorithm.
Simulation of multi-power composite electric tractor based on power fluctuation ratio
Authors: Xu Wenxiang , Liu Mengnan , Xu Liyou 
Published: December 2021

Abstract
All Combined with the characteristics of frequent abrupt load in the field operation of tractors, and aiming at the problems of single motor energy input and large fluctuation of battery state in the energy system of pure electric tractors, a power supply structure with multiple battery packs was proposed. A dynamic model considering real-time power and load fluctuation and a multi-power cooperative input model based on fuzzy control threshold logic rule based on power fluctuation ratio are established. Matlab and Simulink are used to simulate the model and compare it with the traditional single power model. The results show that when the speed is constant ploughing, the output power of the lithium battery of the multi-power cooperative input model is effectively compensated compared with that of the single-power model under sudden load. The average fluctuation ratio of rising power decreases from 5.8% / s to 2.7% / s, which realizes “peak clipping” and “slow peak” when the current fluctuates greatly. and then made the estimation of battery state of charge (SOC) more accurate, and prolonged the battery life.
Mechanism and Mitigation Strategy of Sub-synchronous Oscillation Caused by Grid-connected DFIG with Series Compensation
Authors: Yang Jing , Sun Yong , Fa Ladier , Zhang Shuhan , Wang Zhihao , Mei Limin 
Published: December 2021

Abstract
Power systems are at risk of sub-synchronous oscillation (SSO) when connecting doubly-fed induction generator (DFIG)-based wind turbines to transmission lines with series compensation. This paper focuses on the mechanism and mitigation strategy of SSO. Firstly, the mechanism of SSO is studied from two aspects: induction generator effect (IGE) and sub-synchronous control interaction (SSCI). An equivalent circuit is developed to illustrate the negative resistance effect. Based on the result of the analysis, the SSO mitigation strategy using notch filter and virtual resistance control is proposed. In order to verify the result of analysis and the effectiveness of mitigation strategy, time-domain simulations are carried out based on PowerFactory DIgSILENT.
Study on inductive method of vibration normalized spectrum of equipment on the communication tower
Authors: Zhang Pengbo , Zhang Xuezhong , Sun Guoliang , Ji Shuqiang , Han Di 
Published: December 2021

Abstract
In today’s society, communication is becoming more and more important. However, communication equipment is subjected to the vibration caused by wind in communication tower for a long time. In this paper, the inductive methods of vibration normalized spectrum for the equipment on the tower are introduced. Combined with the characteristics of communication tower, based on the current national military standards and some related papers, the random vibration environment data from communication tower can be inductive and processed. The energy distribution of the spectrum is compared with that of the European standard. The measured spectrum by induction is used in engineering tests, it also has laid a foundation for improving the reliability of the relevant equipment on the communication tower.
Detection methods for springback of assembled camshaft under hydraulic expansion
Authors: Gao Zhiwei , Yang Lianfa , Ma Jianping , Don Chenchen , Liu Xu , Song Lin 
Published: December 2021

Abstract
The assembled camshaft under hydraulic expansion has the advantages of low cost, lightweight and high performance, which is an advanced technology with great development potential. By applying the tube hydroforming to the fabrication of assembled camshaft, the expansion principle is due to the different degrees of resilience of the cam and the shaft. Therefore, the effective detection method of elastic recovery of camshaft is of great significance to research how to improve the connection strength of the assembled camshaft. This paper introduces several springback detection methods for assembled camshaft under hydraulic expansion, namely resistance strain detection method, gap dynamic detection method and finite element simulation.
Numerical calculation of passenger compartment cooling effect under the action of radiative cooling film based on MATLAB
Authors: Chao Yipeng , Luo Xin , Zheng Chao , Chao Yipeng 
Published: December 2021

Abstract
Radiative cooling uses space cold source to cool the object, and the radiative cooling film made by using this principle can be applied to automobiles effectively to save the refrigeration resources of automobiles. However, due to the limitation of economy, time, space and other factors, it is difficult to carry out comprehensive research on the actual film-forming cooling effect. Based on the principle of passive radiative cooling, a set of simulation models is developed, which is applied to the selection of infrared radiation materials for automotive radiative cooling film and the study of the influence of environmental factors on the radiative cooling effect. SiO2 was finally selected as infrared radiation material. At the same time, the theoretical cooling temperature of the radiative cooling film applied to the passenger compartment of automobiles can reach 6.8°C under the conditions of 35°C ambient temperature, 0.99 atmospheric transmittance and 10 heat transfer coefficient, using SiO2 as infrared radiation material and PE as dispersion substrate. At the same time, the cooling effect of the radiative cooling film is positively correlated with the ambient temperature, atmospheric transmittance to some extent.
The auto-monitoring of geo-technical centrifuge operating state based on weighted data fusion
Authors: Cheng Yongbo , Hong Jianzhong , Fu Xing , Zheng Dianchen , Zhang Jianquan 
Published: December 2021

Abstract
There are many parameters which could reflect the operating state of geotechnical centrifuge. However, only one parameter is detected generally ; this is insuficient and unsafe for the running of the geotechnical centrifuge. This paper put forward an auto-running sate monitoring method which based on the multi-parameters’ weighted data fusion. The way by multi-sensor acquirring the running state data of the geotechnical centrifuge, then processing the data with weighted data fusion could produce the comprehensive running state parameter, which feed forward to the control system to keep the equipment running in a safe manner. The method in this paper could be implemented automatically and the result for safety monitroing is sufficient, the effect is much more efficient.
Damage comparative analysis of needled C/SiC composite under vibration fatigue loading and monotonic tensile loading
Authors: Wu Shaodong , Shang Deguang , Zuo Linxuan , Qu Linfeng , Hou Geng , Guo Yier , Miao Bin , Hao Guocheng 
Published: December 2021

Abstract
Needled C/SiC composite is composed of fiber and matrix, witch fatigue limit is related to the vibration loading frequency. A kind of plate specimen made of needled C/SiC composite was tested on a shaking table, and the vibration fatigue life of each specimen was obtained. In addition, the monotonic tensile test of needled C/SiC composite specimen was also carried out. Furthermore, the fracture morphologies from vibration test and monotonic tensile test were compared by scanning electron microscope. And the mechanism causing these differences was also explained.
Numerical Simulation of Solidification Structure of Al Alloy During Centrifugal Casting
Authors: Qian Xiaoming , Sheng Xue , Meng Longzhou , Li Yong , Wang Zhaodong 
Published: December 2021

Abstract
The centrifugal casting process of 6082 Al alloy was simulated by ProCAST software. The effects of rotation speed and heat transfer coefficient on the filling and solidification behaviour were analysed. The porosity of the cast pipe increases with the increase of the rotation speed and decreases with the increase of heat transfer coefficient. The CAFE model was used to simulate the grain structure of centrifugal cast Al alloy under different process conditions. When the rotation speed and heat transfer coefficient increase, the length of columnar crystal region will increase and the grain will be refined.
Research on the key design and application of the device of opening cover and ring cutting and digging flesh of Mandari
Authors: Tan Weichao 
Published: December 2021

Abstract
Aiming at the problems of low efficiency and poor sanitation of manual cover opening and meat digging in the production of common orange tea, a multi station full-automatic meat digging machine for common orange tea is designed to realize the automatic cover opening and pulp separation device of green orange, so as to meet the production of common orange tea in Xinhui District of Jiangmen. The mechanism of peel stress and pulp separation damage of green citrus in the process of mechanical meat digging was studied. The state of peel contact deformation area of green Citrus under the extrusion of meat digging knife was analyzed by simulation, and the structural and operating parameters of de jacking and opening mechanism and meat digging mechanism were optimized. When the extrusion force was less than 35.6n, the peel damage rate could be minimized. Compared with manual operation, it reduces labor cost and production cost, saves processing time, and realizes automatic and rapid production.
The effect of a new route on the microstructure and property of 6063 alloy during the ECAP deformation
Authors: Zhao Nannan , Ban Chunyan 
Published: December 2021

Abstract
The microstructures and hardness of 6063 Al alloy subjected to different ECAP route (Bc and the new route) were investigated. These two routes have different rotation scheme of a sample around its long axis between two consecutive ECAP passes: Bc route, by which sample were rotated in the same direction by 90°; the new route, by which sample were rotated in the same direction by 135°. The feature microstructures of the samples subjected to the two routes were investigated by the optical microscopy (OM) and transition electron microscopy (TEM), respectively. In comparison, the pressing by the new route produces more homogeneous microstructure with the higher fraction of high angle boundaries. Furthermore, the hardness results showed that work hardening can be observed and do not depend much on the ECAP route. However, distribution of hardness in cross-sections of samples revealed that processing to total passes number of eight by the new route improves deformation uniformity.
Follow-up of the IceCube alerts with the Baikal-GVD telescope
Authors: Dik V.Y. , Allakhverdyan V.A. , Avrorin A.D. , Avrorin A.V. , Aynutdinov V.M. , Bannasch R. , Bardačová Z. , Belolaptikov I.A. , Borina I.V. , Brudanin V.B. , Budnev N.M. , Dik V.Y. , Domogatsky G.V. , Doroshenko A.A. , Dvornický R. , Dyachok A.N. , Dzhilkibaev Zh.-A.M. , Eckerová E. , Elzhov T.V. , Fajt L. , Fialkovski S.V. , Gafarov A.R. , Golubkov K.V. , Gorshkov N.S. , Gress T.I. , Katulin M.S. , Kebkal K.G. , Kebkal O.G. , Khramov E.V. , Kolbin M.M. , Konischev K.V. , Kopański K.A. , Korobchenko A.V. , Koshechkin A.P. , Kozhin V.A. , Kruglov M.V. , Kryukov M.K. , Kulepov V.F. , Malecki Pa. , Malyshkin Y.M. , Milenin M.B. , Mirgazov R.R. , Naumov D.V. , Nazari V. , Noga W. , Petukhov D.P. , Pliskovsky E.N. , Rozanov M.I. , Rushay V.D. , Ryabov E.V. , Safronov G.B. , Shaybonov B.A. , Shelepov M.D. , Šimkovic F. , Sirenko A.E. , Skurikhin A.V. , Solovjev A.G. , Sorokovikov M.N. , Štekl I. , Stromakov A.P. , Sushenok E.O. , Suvorova O.V. , Tabolenko V.A. , Tarashansky B.A. , Yablokova Y.V. , Yakovlev S.A. , Zaborov D.N. 
Published: December 2021

Abstract
The high-energy muon neutrino events of the IceCube telescope, that are triggered as neutrino alerts in one of two probability ranks of astrophysical origin, “gold” and “bronze”, have been followed up by the Baikal-GVD in a fast quasi-online mode since September 2020. Search for correlations between alerts and GVD events reconstructed in two modes, muon-track and cascades (electromagnetic or hadronic showers), for the time windows ±1 h and ±12 h does not indicate statistically significant excess of the measured events over the expected number of background events. Upper limits on the neutrino fluence will be presented for each alert.
Interactive influence of ENSO and IOD on contiguous heatwaves in Australia
Authors: Reddy P Jyoteeshkumar , Perkins-Kirkpatrick Sarah E , Sharples Jason J 
Published: December 2021

Abstract
Australian heatwaves have a significant impact on society. Most previous studies focus on understanding them in terms of frequency, duration, intensity, and timing. However, understanding the spatial characteristics of heatwaves, particularly those occurring in contiguous regions at the same time (here referred to as contiguous heatwaves), is still largely unexplored. Here, we analyse changes in spatial characteristics of contiguous heatwaves in Australia during 1958–2020 using observational data. Our results show that extremely large contiguous heatwaves are covering significantly larger areas and getting significantly longer during the recent period (1989/90–2019/20) compared to the historical period (1958/59–1988/89). We also investigated the association of contiguous heatwaves in Australia with interactions of the El Niño–Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) using a large multi-member ensemble of a physical climate model. We found that areal magnitude, total area, median duration, and maximum area of large and extremely large contiguous heatwaves in Australia are significantly higher (lower) during the strong El Niño (Es), strong El Niño co-occurring with strong IOD positive (Es-IPs), and with moderate IOD positive (Es-IPm) (co-occurring strong La Niña with the strong IOD negative (Ls-INs)) seasons relative to the neutral seasons (where both ENSO and IOD are in neutral phase). During the Es, Es-IPm, and Es-IPs seasons, the large-scale physical mechanisms are characterised by anticyclonic highs over the southeast and cyclonic lows over the northwest of Australia, favouring the occurrence and intensification of heatwaves in Australia. These results provide insights into the driving mechanisms of contiguous heatwaves in Australia.
Regionalizing crop types to enhance global ecosystem modeling of maize production
Authors: Yang Yi , Ogle Stephen , Del Grosso Stephen , Mueller Nathaniel , Spencer Shannon , Ray Deepak 
Published: December 2021

Abstract
Improving the prediction of crop production is critical for strategy development associated with global food security, particularly as the climate continues to change. Process-based ecosystem models are increasingly used for simulating global agricultural production. However, such simulations often use a single crop variety in global assessments, implying that major crops are identical across all regions of the world. To address this limitation, we applied a Bayesian approach to calibrate regional types of maize (Zea mays L), capturing the aggregated traits of local varieties, for DayCent ecosystem model simulations, using global crop production data from 2001 to 2013. We selected major cropping regions from the FAO Global Agro-Environmental Stratification as a basis for the regionalization and identified the most important model parameters through a global sensitivity analysis. We calibrated DayCent using the sampling importance resampling algorithm and found significant improvement in DayCent simulations of maize yields with the calibrated regional varieties. Compared to a single type of maize for the world, the regionalization of maize leads to reductions in root mean squared error of 11%, 31%, 27%, 30%, 19%, and 27% and reductions in bias of 59%, 59%, 50%, 81%, 32%, and 56% for Africa, East Asia, Europe, North America, South America, and South and Southeast Asia, respectively. We also found the optimum parameter values of radiation use efficiency are positively correlated with the income level of different regions, which indicates that breeding has enhanced the photosynthetic efficiency of maize in developed countries. There may also be opportunities for expanding crop breeding programs in developing countries to enhance photosynthesis efficiency and reduce the yield gap in these regions. This study highlights the importance of representing regional variation in crop types for achieving accurate predictions of crop yields.
On two reversible cellular automata with two particle species
Authors: Klobas Katja , Prosen Tomaž 
Published: December 2021

Abstract
We introduce a pair of time-reversible models defined on the discrete space–time lattice with three states per site, specifically, a vacancy and a particle of two flavours (species). The local update rules reproduce the rule 54 reversible cellular automaton when only a single species of particles is present, and satisfy the requirements of flavour exchange (C), space-reversal (P), and time-reversal (T) symmetries. We find closed-form expressions for three local conserved charges and provide an explicit matrix product form of the grand canonical Gibbs states, which are identical for both models. For one of the models this family of Gibbs states seems to be a complete characterisation of equilibrium (i.e. space and time translation invariant) states, while for the other model we empirically find a sequence of local conserved charges, one for each support size larger than 2, hinting to its algebraic integrability. Finally, we numerically investigate the behaviour of spatio-temporal correlation functions of charge densities, and test the hydrodynamic prediction for the model with exactly three local charges. Surprisingly, the numerically observed ‘sound velocity’ does not match the hydrodynamic value. The deviations are either significant, or they decay extremely slowly with the simulation time, which leaves us with an open question for the mechanism of such a glassy behaviour in a deterministic locally interacting system.
The Advantages of Implementing Integrated Farming Systems For Integration of Goats and Ducks with Terubuk (Saccharum edule Harl)
Authors: Sukmawani Reny , Putriyana Aulia Miftahunnisa Exa , Andayani Sri Ayu 
Published: December 2021

AbstractThis research was conducted to examine the advantages of the application of integrated farming systems between goats and ducks with terubuk in Sukabumi. The research is a case study from the farmers who adjust integrated farming systems then the data was analyzed descriptively qualitative. The result of the study show that the application of this integration between goats and ducks with terubuk has advantages in terms of cultivation, social and economic aspects. Based on the cultivation aspect, this system is efficient because of the continuous availability of feed. Furthermore, based on social aspect can minimize problems such as problem that arise due to presence of waste that cause pollution can be overcome because of the use of waste are more useful. Economic aspect of this system to be efficient because of an increase in income by reducing expenses for feed by 60% and reducing fertilizer requirement by 100%
Analysis of precipitation microstructure characteristic during Madden Julian Oscillation (MJO) using micro rain radar (MRR) and disdrometer in South Tangerang
Authors: Nurheliza D , Trilaksono N J , Renggono F 
Published: December 2021

Abstract
Rain microstructure is a critical aspect to understand the dynamics and microphysics character of the clouds. It is characterized by the distribution of size, fall velocity and shape of raindrop. Raindrop size distribution (DSD) explains the detail of the microphysical process because it represents a process of rain to the surface. One of the phenomena that influence the rain patterns in Indonesia is Madden Julian Oscillation (MJO). Therefore, observing rain microstructure with its relation to MJO can determine the differences in rainfall characteristic and microphysical processes during active and inactive MJO period. The data used in this study are Micro Rain Radar (MRR), disdrometer, and real-time multivariate (RMM) index data. The period/date selection of active MJO event performed using RMM index method is more than 1 in phases 4 and 5 and otherwise for inactive MJO. Types of rain are divided into stratiform and convective rain based on disdrometer data. From that, there are 46 active and 52 inactive MJO events. Rain microstructure in this study focuses on DSD from disdrometer and micro rain radar data analyzed with liquid water content profile, fall velocity, reflectivity, and rain rate from MMR. Besides, there are parameters of DSD, which are the mass-weighted diameter (Dm) and total concentration (Nw), calculated using the moment and gamma distribution method. The result shows that DSD and other parameters are greater during inactive MJO period. It means that process of collision-coalescence, evaporation, and updraft is dominant during inactive MJO period.
Analysis PM10 and Visibility During Forest Fire in Palangka Raya
Authors: Indrawati A. , Andarini D. F. , Cholianawati N. , Sumaryati  
Published: December 2021

Abstract
Forest fires have an impact on air quality and visibility. Visibility can be associated with a highly visual indicator of air pollution. This research aims to analyze the relationship between the PM10 concentration and visibility during the forest firest events and normal conditions in Palangkaraya from 2000 to 2014 by using a regression method. The relative humidity data was used to filter the PM10 and visibility. Furthermore, the equation resulted from the regression analysis was used to predict PM10 concentration in Palangka Raya. The result showed that the regression pattern tends to form a logarithmic function. Specifically, without filtering data, the coefficient correlation (r-value) during the forest fire events and normal conditions are 0.69 and 0.5, respectively. Meanwhile, a data filtering method gives a higher relationship between PM10 and visibility, with the r-value of 0.7 for the forest fire events and 0.68 for the normal condition. On the other hand, the prediction of PM10 concentration indicates a high bias value due to the other influenced factors that have not been included in this study.