bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and research of feed switching system for 40m radio telescope
Authors: Yang Feng-hui , Wang Min , Dong Liang , Shi Shuo-biao 
Published: April 2023

Abstract
For a large-aperture radio telescope, the working frequency of the feed and receiver determines its working range and capability. Many telescopes are designed with relatively few feed sources. With the development of deep space explorations and astronomical technologies, the existing feed of the antenna cannot meet the needs of observation tasks. To further adapt to the needs of the lunar exploration project, deep space explorations, and other astronomical observations, the feed of the 40 m antenna was upgraded with multiple feeds and feed switching systems. Based on not changing the existing antenna structure, the original S/X dual band feed is removed, a new S/X dual band feed is installed, C band and Ku band feeds are added, and rapid electrical switching of three feeds was realized. This paper gives a detailed design scheme and an implementation scheme of the feed-switching system. After being upgraded, the performance indexes of the antenna meet requirements, and the 40m telescope has multi-band reception capability, which lays a foundation for making the best of the telescope and making more scientific research outputs.
Multi-Sensor Fusion Tomato Picking Robot Localization and Mapping Research
Authors: Chen Kai , Yang Jian , Jiang Shuai , Xiong Chuan 
Published: April 2023

Abstract
To address the current problem of unsatisfactory localization and map building of an intelligent picking robot mobile platform in an unstructured picking environment, a multi-sensor fusion localization and map building method is proposed to fuse the visual odometer position estimation results with IMU and wheel odometer. And the pre-fusion processing of wheel odometer data is proposed to solve the problem of large errors of wheel odometers on uneven ground. The multi-sensor fusion scheme is proposed to fuse vision and laser SLAM methods to build a more information-rich point cloud and raster fusion map for the problem of non-closure caused by sparse branches. The experimental results show that the multi-sensor fusion SLAM method can obtain more accurate, richer, and more robust maps.
Research of Continuous Delta-Sigma Analog-to-Digital Converter for Bio-Electricity Signal Acquisition
Authors: Li L W , Sun J 
Published: April 2023

Abstract
In this paper, a continuous delta-sigma analog-to-digital converter with a low power, single-ring, third-order mixed integrator for bio-electricity signal acquisition is proposed. For the trade-off between low power consumption and high resolution, the Active-RC integrator is used in the first-order of the third-order feedforward modulator and the Gm-C integrator with improved linearity is adopted for the second and third order integrators. Because of the infinite resistance provided by the Gm-C integrator, the first-order integrator can replace the traditional second-order operational transconductance amplifier (OTA) with a single-stage OTA operating in the weak invert region to achieve low power consumption and ensure the output swing of the first-order integrator. The structure of cascade-of-integrators with feedforward (CIFF) can scale the output voltage values of three integrators and reduce the requirement of linearity of the Gm-C integrator, to reduce the design difficulty of the Gm-C integrator. In addition, the linearity of the second and third-order Gm-C integrator is improved by using the auxiliary difference pair OTA with source-level negative feedback. Therefore, the matching between the circuit structure and the model coefficients is improved significantly.
Operation Optimization Study of Integrated Energy System with Electric and Thermal Coupling Characteristics
Authors: Zhang Min , Fan Rui , Wang Jinhao , Zhi Huiqiang , Chang Xiao 
Published: April 2023

Abstract
The differences in inertia effects on multiple energy sources cause an imbalance between energy supply and load demand. Therefore, an operation optimization method for a comprehensive energy system with electric and thermal coupling characteristics is proposed. This method adopts the thermal system to reduce the system operation cost and improve operational reliability. Firstly, the method takes the energy transmission network of IES as the basis and establishes the model of the heating pipeline. Secondly, the method also takes the lowest total operating cost of the system as the goal, combines the power balance and equipment operation safety and other constraints, considers the electro-thermal coupling characteristics, establishes the corresponding IES operation optimization model, and applies the genetic algorithm to solve it. Finally, the simulation results show that the method can effectively reduce the system operation cost while ensuring the smooth and safe operation of the equipment based on the optimization model.
Based on MOPSO Algorithm of Real-Time Traffic Signal Optimization Control for Intelligent Transportation Intersections
Authors: Guo Jinwei , Huang Xiaoyan , Li Ran , Li Ziyan , Sun Ning , Dong Haibo 
Published: April 2023

Abstract
In order to improve the traffic efficiency of intersections, this paper establishes a multi-objective optimization model with the minimum real-time delay time and maximum capacity as the optimization objectives by applying multi-objective particle swarm optimization algorithm, and simulates the actual intersections. By optimizing the multi-objective model, a set of Pareto optimal solution sets can be obtained, and the optimal timing scheme can be determined by using multi-attribute decision-making algorithm and real-time update of signal timing configuration parameters to achieve dynamic optimization of signal timing. The simulation model of city road intersection is established by SUMO software. By using multi-objective particle swarm optimization algorithm to optimize the intersection simulation model, the traffic capacity of the simulated intersection has been greatly improved, with the average traffic capacity increasing by about 3.69% and the average vehicle delay time decreasing by about 21.35%.
Research on the current control method of PMSM based on the improved sliding mode controller
Authors: Chen Ziyi , Chen Guochu 
Published: April 2023

Abstract
Times are changing with each passing day, and permanent magnet synchronous motors are becoming popular in the new energy industry on account of its power consumption conversion rate is the same, its pollution is relatively small. For the problems of Buffeting and error when the system reaches stability vector control of PMSM, paper researches and tenders a kind of vector control based on a double power sliding mode permanent magnet motor. First, the traditional PI controller is replaced by a modified convergence-law sliding mode control in the current loop to improve overshoot and sliding mode jitter, new system stability is determined using Lyapunov function. Finally, simulation system in MATLAB/simulink is built, and the double-power sliding mode approach law, common sliding mode approach law, and PI control are compared and verified, and the waveforms of the three methods are compared.
Paper, method of double power reaching law is used to track and control the current loop, the innovation point is that the double exponential law of approach, its advantage in (1) compared with other general convergence speed law of approach of sliding mode control(SMC) for faster relative to the general SMC (2) the steady-state error is smaller, effectively prevent the chattering.
Reconfiguration Incremental Control Allocation for Tailless Aerial Vehicle with Control Surface Faults
Authors: Su Maoyu , Hu Jianbo , Wang Yingyang , Cong Jiping 
Published: April 2023

Abstract
To address the faults of the tailless aerial vehicle control surface with nonlinear control effectiveness, a reconfiguration incremental control allocation method is proposed. Under the framework of incremental control allocation, four types of typical control surface faults, such as floating, jamming, damaged, and median offset, are modeled. The isolation of faulty control surfaces and the reconfiguration of the flight control system is realized by adjusting the control surface deflection increment limit and changing the local control effectiveness matrix. The results show that the method can effectively take advantage of the redundant configuration of the control surface, prevent the system from losing control caused by the fault of the control surface, and enhance the safety and reliability of the system.
Longitudinal Control Technology for Automatic Carrier Landing Based on Model-compensated Active Disturbance Rejection Control
Authors: Yang Wenqi , Zhou Siyu , Lu Jianhua , Song Liting 
Published: April 2023

Abstract
Carrier aircraft landing is a system engineering with strong nonlinear, strong coupling, and complex environmental interference. Landing control is one of the key technologies for carrier aircraft landing, which directly affects the success of the landing. A longitudinal decoupling control method based on Model Compensated Linear Active Disturbance Rejection Control (MCC-LADRC) is proposed for tracking the deck motion and maintaining the attack angle in the final stage of the carrier landing. The simulation results show that compared with the PID control and traditional LADRC strategy, the MCC-LADRC method can not only control the carrier aircraft to track the deck motion synchronously and accurately, improve the landing accuracy and anti-disturbance capability but also has a good attack angle retention effect and eliminate the coupling between the pitch angle and the attack angle.
Analysis of harmonic resonance amplification caused by AC submarine cable integration of offshore wind farm
Authors: Gu Wen , Zheng Chaohang , Yang Hongyu , Wu Xi , Wang Hong , Xu Haohui 
Published: April 2023

Abstract
Offshore wind power plants (WPPs) using AC submarine cables connected to the power grid may experience harmonic resonance and harmonic amplification that are not common in onshore wind farms under the action of the distributed capacitance of submarine cables, which seriously threatens the safe and reliable operation of offshore WPPs. To investigate the influencing factors of harmonic amplification in offshore WPPs, a scalable state space-based modeling method for large-scale offshore WPPs were established. Moreover, the root locus method was used to study how the factors including that grid short-circuit capacities, cable parameters and the number of wind turbine generators (WTGs) affect the resonance modes. Finally, an offshore WPP in Jiangsu was built on the MATLAB/Simulink simulation platform, and the analysis results verify the correctness of the theoretical analysis.
Vehicle-Mounted Platform for Autonomous Take-off and Landing of Unmanned Aerial Vehicles
Authors: Yang Zhen , Li ChangLong , Jiang Nan , Shen YiCheng , Huang Wei 
Published: April 2023

Abstract
By expounding and proving the technical background of and demand for the platform for the take-off and landing of unmanned aerial vehicles (UAVs), and by analyzing the necessity in combination with current domestic and overseas situations, this paper reveals how a vehicle-mounted platform for take-off and landing of UAVs consisting of multiple connecting rods was developed. Meanwhile, the feasibility of the technology of the vehicle-mounted platform for take-off and landing consisting of multiple connecting rods was verified from multiple aspects by utilizing precision transmission technology, a general mechanical model, and a proof-of-principle prototype.
Study on Double-Resonant Characteristics of Load Simulation System for Electro-Hydraulic Servo Mechanism
Authors: Song Enming , Yin Chuanwei , Wang Yaqi , Chang Dongyan 
Published: April 2023

Abstract
The electro-hydraulic servo mechanism and engine realize thrust vector control together. Due to the low natural frequency of the engine, the dynamic characteristics of the test process show the result of double-resonance. The load simulation system can improve the efficiency of production tests and replace the actual engine in the production process. This paper fully considers the resonant problem of the engine, gives the relevant structural design scheme and parameter adjustment method to the load simulation system, and tests and analyzes the resonant characteristics. It aims at changing the resonant characteristics of the load simulation system by designing and adjusting the connection stiffness and torsional stiffness to achieve the real load condition.
Study on automatic lane change trajectory control of intelligent vehicle on expressway
Authors: Deng Huan , Wang Jian , Yang Jun , Du Ruofei , Hai Zhenyang , wang Yunjing 
Published: April 2023

Abstract
Aiming at the dangerous working condition of the front car driving at low speed, a safety distance model using the vehicle braking process is proposed to determine the best time for intelligent vehicles to change lanes. Based on the fitting method of quintic polynomial, an automatic lane change fitting trajectory is constructed, and the LQR algorithm is used to achieve accurate tracking. Through the joint simulation and experiment of CarSim, PreScan, and MATLAB/Simulink, it is shown that the established lane change trajectory control model can determine the best time for intelligent vehicles to change lanes, plan safe and comfortable lane change trajectory, and achieve good tracking effect.
Slow time-varying MIMO-OFDM modulation and coding for underwater acoustic channels
Authors: Cong Ying , Wu Jian , Jiao KeKe , Shi Heng , Sun YiMin 
Published: April 2023

Abstract
The underwater acoustic channel has the characteristics of limited available bandwidth and serious multipath fading. This paper uses orthogonal frequency division multiplexing (OFDM) and multiple input multiple output (MIMO) to solve this problem. As one of the core technologies of the MIMO system, space-time coding is implemented simultaneously in time and space to overcome spatial interference. On this basis, this paper proposes a precoding technique further to reduce the bit error rate of underwater acoustic communication.
Fractional Low-Order Blind Equalization Algorithm Based On SAPSO Optimization under Impulsive Noise
Authors: Tang Jun , Deng Zhaocai , Dang Zhaokai , Li Chuanqing 
Published: April 2023

Abstract
To address the problem that the traditional constant mode blind equilibrium algorithm (CMA) cannot converge stably in a water channel under α-stable distributed noise, we propose a fractional low-order blind equilibrium algorithm (SAPSO-FLOSCMA) based on simulated annealing particle swarm algorithm optimization. The algorithm introduces a simulated annealing operation in the particle swarm algorithm (PSO) to make the population accept the difference solution with a certain probability of accepting the difference solution to enhance the ability of the PSO algorithm to jump out of the local optimal solution. Then the cost function of the FLOSCMA algorithm is used as the fitness function of the SAPSO algorithm, and the global optimal solution is iteratively searched by using the SAPSO algorithm. The global optimal solution is used as the initial weight vector of the equalizer. The underwater acoustic simulation results show that compared with the CMA and FLOSCMA, the algorithm improves the convergence speed and reduces the inter-code interference.
Helimak control system
Authors: Yang S.Q. , Wen F. , Wu M.Q. , Li H. , Zhu X. , Hao B.L. , Li G.S. , Lin X.D. , Gao X. 
Published: April 2023

Abstract
The excellent wall condition is essential for fusion devices
to generate reproducible high-parameter plasma. Wall conditioning
techniques should be validated before applying on large fusion
devices to reduce potential risk. Helimak, a toroidal steady state
magnetic confinement device, was reassembled and upgraded to a
technical validation platform for wall conditioning. A new control
system has been developed to achieve the upgrade of Helimak. The
control system is based on a distributed control architecture, which
provides not only efficient development but also flexible control
mechanisms. For each auxiliary subsystem, a corresponding local
control module is developed to drive and control a variety of
equipment. The control network ensures real-time transmitting of the
parameters and data. A dedicated trigger network and timing control
module can improve synchronization and real-time performance. Data
acquisition system based on mature commercial busses provides
sufficient data acquisition capabilities for diagnostic tools. The
data management system uses MDSplus to provide convenient data
access. An independent interlock and safety system is designed for
comprehensive and reliable personal protection. After engineering
commissioning, the Helimak has realized wall conditioning by
electron cyclotron resonance heating (ECRH) plasma at different
resonance positions. The flexibility of control systems allows the
installation of more wall conditioning tools in the future that will
provide the ability to validate combined wall conditioning
techniques. Helimak will become a low-cost, reliable technology
verification platform, which will help to achieve advanced scenarios
in tokamak and stellarator.
Design and Rationale of the Home Blood Pressure Telemonitoring Linked with Community Health Workers to Improve Blood Pressure (LINKED-BP) Program
Authors: Commodore-Mensah Yvonne , Liu Xiaoyue , Ogungbe Oluwabunmi , Ibe Chidinma , Amihere Johnitta , Mensa Margaret , Martin Seth S , Crews Deidra , Carson Kathryn A , Cooper Lisa A , Himmelfarb Cheryl R 
Published: April 2023

AbstractBACKGROUNDDisparities in hypertension outcomes persist among Black and Hispanic adults and persons living in poverty in the United States. The “LINKED-BP Program” is a multi-level intervention linking home blood pressure (BP) monitoring with a mobile health application, support from community health workers (CHWs), and BP measurement training at primary care practices to improve BP. This study is part of the American Heart Association RESTORE (AddREssing Social Determinants TO pRevent hypErtension) Network. This study aims to examine the effect of the LINKED-BP Program on BP reduction and to evaluate the reach, adoption, sustainability, and cost-effectiveness of the intervention.METHODSUsing a hybrid type I effectiveness-implementation design, 600 adults who have elevated BP or untreated stage 1 hypertension without diabetes, chronic kidney disease, history of cardiovascular disease (stroke or coronary heart disease) and age &lt; 65 years will be recruited from 20 primary care practices including community health centers in the Maryland area. The practices are randomly assigned to the intervention or the enhanced usual care arms. Patients in the LINKED-BP Program receive training on home BP monitoring, BP telemonitoring through the Sphygmo app, and CHW telehealth visits for education and counseling on lifestyle modification over 12 months. The primary clinical outcome is change from baseline in systolic BP at 6 and 12 months.DISCUSSIONSThe LINKED-BP Program tests a sustainable, scalable approach to prevent hypertension and advance health equity. The findings will inform implementation strategies that address social determinants of health and barriers to hypertension prevention in underserved populations.ClinicalTrials.gov IDENTIFIERNCT05180045.
How molting locusts avoid cannibalism
Authors: Maeno Koutaro Ould , Piou Cyril , Whitman Douglas W , Ould Ely Sidi , Ould Mohamed Sid’Ahmed , Jaavar Mohamed El Hacen , Ould Babah Ebbe Mohamed Abdallahi 
Published: April 2023

AbstractGroup living has various benefits, but it also carries costs, such as risk of cannibalism. Molting is a vulnerable period of being cannibalized in juvenile arthropods, but how gregarious arthropods avoid this threat is poorly understood. Here, we examined how actively migrating gregarious nymphs of desert locust, Schistocerca gregaria, avoid cannibalism during molting, in the Sahara Desert of Mauritania. In the field, gregarious nymphs cyclically march and feed on grass during the day. Our field observations found that marching behavior helped separating pre-molting and cannibalistic non-molting nymphs. Cannibalistic non-molting nymphs marched away from roost plants, leaving sedentary pre-molting nymphs behind, creating cannibal-free spaces. Some non-molting nymphs reached a pre-molting state after daytime marching, thus both pre- and non-molting nymphs roosted on same plants at night. However, pre-molting nymphs moved away from conspecifics prior to molting. Starvation experiments confirmed that food-satiation decreased cannibalistic necrophagy. Physiological surveys of diel feeding and molting patterns revealed that nymphs molted at times when conspecifics were food-satiated rather than hungry. Hence, our results indicate that behavioral and physiological traits of gregarious locusts could function to spatiotemporally separate molting locusts from cannibalistic conspecifics, thus reducing molting-associated cannibalism. This is the first report of migration-dependent molting synchrony as a mechanism reducing costs of aggregation in gregarious arthropods.
Mito-nuclear discordance in the phenotypically variable Andean hummingbirdsCoeligena bonaparteiandCoeligena helianthea(Trochilidae)
Authors: Palacios Catalina , Campagna Leonardo , Parra Juan Luis , Cadena Carlos Daniel 
Published: April 2023

AbstractThe interplay among evolutionary mechanisms like gene flow and selection may result in discordant signals between mitochondrial DNA, nuclear markers and phenotypes. The Andean hummingbirds Coeligena bonapartei and Coeligena helianthea showed differentiation in the gene ND2 which is discordant with plumage coloration but consistent with geography. We analysed complete mitochondrial genomes of individuals from Coeligena bonapartei bonapartei, Coeligena bonapartei consita, Coeligena helianthea helianthea, and Coeligena helianthea tamai to inform their evolutionary history. We found genetic structure despite low genetic differentiation among these populations. Phylogenetic and network analyses based on mitogenomes showed a northern vs. southern differentiation pattern which is discordant with the relationships based on nuclear markers and the coloration phenotypes (serving as a basis for taxonomy). Mitogenomes of the two nominate subspecies are indistinguishable, suggesting incomplete lineage sorting or introgression, while those of C. b. consita and C. h. tamai are more similar to each other than they are to their respective nominate subspecies. Our results indicate that various evolutionary mechanisms drove the divergence in phenotypes, and nuclear and mitochondrial genomes of Coeligena hummingbirds, playing out over a complex biogeographic scenario likely involving periods of isolation and secondary contact. We outline hypotheses to be tested with future analyses of genome-wide variation.