bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of Hardware-In-The-Loop Simulation System for UAV Braking System on Electromechanical Actuator
Authors: Ji Xu , Zhang Wei , Liu Shanwu , Yang Jian , Li Weiwei 
Published: September 2021

Abstract
In the field of unmanned aerial vehicle(UAV), the electric braking system of UAV using electromechanical actuator is applied more and more widely due to its good safety, high reliability, light weight, small size and other characteristics. In order to realize the product development and performance test of the UAV electric braking system, a hardware-in-the-loop simulation platform is designed in this paper. The simulation platform for UAV electric braking system takes “Simulation model + hardware object” as the core and the design of the platform is based on TI company’s DSP28335 controller and the automatic code generation technology of MATLAB. The test results show that the simulation platform of UAV electric braking system has perfect function and reliable performance, which can provide a good research platform for the development and performance test of a certain type of UAV electric braking system.
Research on Working Process and Stability of Hydraulic Free Piston Engine
Authors: Sun Jie 
Published: September 2021

Abstract
This paper studies the working principle of the hydraulic free piston engine, and details the related contents of the working process of the hydraulic free piston engine. The related contents include the analysis of working state, the analysis of fuel injection characteristics, the analysis of the air exchange system, the analysis of the operating parameters, the working process in the cylinder, etc. The stability of the hydraulic free piston engine is studied by establishing a nonlinear model. Based on this, the stability control strategy is developed, which aims to accumulate reliable experimental data and lay a good application foundation for developing the dynamic control of hydraulic free piston engine in working process.
Effect of initial chirp for input pulse on supercontinuum generation
Authors: Liu Weici 
Published: September 2021

Abstract
The generation of supercontinuum spectrum is a very complex nonlinear process. Based on the nonlinear Schrodinger equation (NLSE), the effect of initial chirp on supercontinuum generation is numerically studied by split-step Fourier (SSF) method. The positive chirp and negative chirp have different effects on the supercontinuum generation. The results show that the energy distribution of supercontinuum spectrum can be improved by selecting appropriate chirp value.
Research on Load-Carrying Capacity of Loader Transmission Oil Based on Driving Axle Bench Test
Authors: Zhen Penghou , An Haizhen , Chen Li , Liu Min 
Published: September 2021

Abstract
The drive axle of loader is often in the state of low speed and high torque when it works, the tooth surface contact pressure is large, the tooth surface load is high, and the oil needs to have good load-carrying capacity. However, the bench test used to evaluate the load-carrying capacity of the drive axle oil adopts the drive rear axle of the truck, and the test conditions are different from the actual working conditions of the drive axle of the loader. In this paper, based on the actual working conditions of the loader drive axle into the test parameters, the bench test of simulated working conditions is carried out, and the load-carrying capacity of the oil is evaluated according to the changes of the oil performance parameters and the tooth surface damage. The results show that the established bench test method can effectively investigate the load-carrying capacity of the oil and provide support for the selection of oil in transmission system.
The Influence of Attack Angle on Projectile Trajectory and Fuze in Oblique Penetration
Authors: Shi Huifa , Ma Shaojie , Li Feiyin , Wei Jian , Tang Tong 
Published: September 2021

Abstract
Oblique deep penetration is a common form of projectile penetration into the target. In view of the fact that most of the research work is focused on the trajectory of vertical penetration, the trajectory and law of oblique penetration are discussed in this paper. This paper studies the impact of different initial angles of attack on projectile trajectory and fuze impact in oblique penetration by simulating projectile penetrating target with LS DYNA software. The results show that with the increase of attack angle, the deflection of trajectory is more obvious, the penetration depth is smaller, and the impact acceleration amplitude of fuze is larger. The research content of this paper provides a reference for oblique penetration of concrete target and impact performance of fuze, and is of great significance for the construction and protection of underground fortifications.
Design and simulation of magnetic adsorption System for 3D curved surface mobile Robot
Authors: Hu Jing , Ren Jing , Liao Guomin , Hu Guichuan 
Published: September 2021

Abstract
With the deepening of intelligent manufacturing applications, 3D curved surface mobile robots need to be developed to meet more and more practical engineering requirements. And the adsorption system is the key part of 3D curved surface mobile robot to overcome the gravity of the robot itself. Firstly, the relationship between adsorption force and inclination angle was calculated on the basis of mechanical characteristics. Secondly, we simulated the magnetic adsorption situation and acquired the relation curves of the adsorption force. Finally, the structure size and adjustment scheme of the magnetic adsorption system were determined according to the simulation results.
Research on Layout of Hoisting Points and Control of Hoisting Deformation of Large Stereo Garage Block
Authors: Li F. , Xiang Z.Q. , Wang J. , Zhang B.S. 
Published: September 2021

Abstract
This paper takes the dock hoisting technology of the large stereo garage block of 7800PCTC (Pure Car and Truck Carrier, PCTC) as research object. Due to the needs of loading vehicles, this kind of block has large structural size and weight, and the lack of vertical and horizontal bulkhead support in the middle, resulting in weak overall structural strength and structural instability and deformation during hoisting. Firstly, according to the hoisting process principle, three layouts of hoisting points are formulated, and the best hoisting points layout scheme is selected through FE (Finite Element, FE) simulation analysis. After analysing the deformation and structural strength of the section, a targeted temporary strengthening scheme is proposed according to the analysis results. The strengthened FE calculation results show that, the stress concentration and excessive structural deformation under the selected layout scheme are effectively controlled. The calculation results provide a strong guarantee for the hoisting in the dock loading stage.
Design of a Control System of Poplar and Willow Catkins Collection Device
Authors: JI Liqin , Zhang Zhengyi , Xie Pengfei , Chen Chao , Lin Manyu 
Published: September 2021

Abstract
The device that can collect poplar and willow catkins is designed to solve the environmental pollution caused by flying willow catkins and to affect people’s health in the spring. The article first conducts the background analysis, then gives the device design scheme, then completes the control system hardware design, software design, and finally designs a highly automatic and energy-efficient willow catkins automatic collection and control device for people.
Structure Design of Surrounding Tree-climbing and Pruning Robot
Authors: Yang Xi , Wang Jichen , Yan Mengxuan , Fan Shan 
Published: September 2021

Abstract
Tree pruning is a very important work in forestry production, which plays an important role in the growth and lumber of trees. In the general environment of automatic production of machinery, the market urgently needs a robot that can realize pruning work to replace a large amount of manual labor and increase the economic benefits of forests. In this paper, a tree-climbing and pruning robot with simple operation and automatic climbing function suitable for trimming a variety of trees is designed. The climbing mechanism of the robot adopts an enveloping wheel climbing structure, and the wheels are installed obliquely to achieve spiral ascent. The pruning mechanism adopts a combination of a mechanical arm and a saw blade, which can change the pruning method according to actual work requirements.
Study on the Characteristics of Mid-Infrared Supercontinuum
Authors: Liu Weici 
Published: September 2021

Abstract
Supercontinuum is widely used in spectroscopy, optical communication system, national defense security, biomedicine and other fields because of its wide spectrum and high coherence. Mid infrared laser have important value and application prospects in many fields, such as spectral analysis, remote sensing technology, space communication, military medical treatment. In this paper, the characteristics of mid-infrared supercontinuum with different distance, different incident pump power and different initial pulse width, are studied by split-step Fourier method (SSFM) based on nonlinear Schrodinger equation (NLSE).
Study on the buffering properties of composites during high-speed penetration
Authors: Chen Zhipeng , Li Haojie , Yang Benqiang 
Published: September 2021

Abstract
In order to solve the problems of heavy overload, poor buffer performance of cushion and low reliability of fuze in high-speed penetration process of the projectile, this paper proposes a composite structural cushion using foamed aluminum and rubber. Through the establishment of the projectile model with different material cushions, the Ls-dyna software is used to simulate the high-speed penetration process and analyze the fuze acceleration curve. The results show that the composite cushion has a significant buffering effect in the process of high-speed penetration, which can reduce the impact overload of fuze and improve the reliability of fuze.
Performance Analysis of Sparse Array Designed by Improved Density-Tapered Method
Authors: Tian Jiahao , Xu HanTao , Cao LaiBao 
Published: September 2021

Abstract
The density-tapered method is a method to simulate amplitude weighting of full array by using the density of antenna element. However, the probability of the existence and non-existence of the element is 0 and 1 respectively, which makes the performance of the side lobe level of the pattern worse than that of the amplitude weighting of full array. In this paper, by improving the density-tapered method, gradual and interdependent density-tapered method is proposed to realize the design of sparse linear array, and the simulation experiments are carried out to compare and analyze the performance of peak side lobe level. The experimental results show that the improved density-tapered method can further reduce the side lobe level of the pattern.
Hydraulic Performance of Water Inlet Device in Ship Scoop Cooling System
Authors: Lao Xingsheng , Dai Tianqi , Gong Xian , Zhang Wei , Li Bangming , Wang Wei 
Published: September 2021

Abstract
The scoop cooling system is widely used in advanced ships which usually requires a water inlet device protruding out of the board. The structure of the water inlet device not only determines the cooling water flow into the system, but also affects the additional resistance of the hull. The ratio of the static pressure difference between windward side of the device and the environment and the dynamic pressure head of the cooling water entering the flow channel is defined as the scoop lift head. The scoop lift head and additional resistance are used to describe the hydraulic performance of the water inlet device of the scoop cooling system, and a theoretical analysis method for the performance of the water inlet device of the scoop cooling system is proposed. The actual ship parameters are used to verify the scoop cooling capability and drag resistance characteristics of the water inlet device.
Application of Artificial Intelligence in Integrated Circuits
Authors: He Yucheng 
Published: September 2021

Abstract
Integrated circuit and artificial intelligence technology are inseparable. Artificial intelligence technology depends on the learning ability and computing ability of computers and other machines. In this process, integrated circuits provide hardware support for the operation of artificial intelligence algorithms. For a long time, the application research of artificial intelligence technology in the field of integrated circuit mainly focuses on circuit fault analysis and artificial intelligence chips. Especially in recent years, due to the rapid development of technology, the combination of the two has become more closely, and more scientists and researchers have invested in the interdisciplinary research of the two disciplines. In this paper, the application of artificial intelligence technology in the field of integrated circuits is explored, that is, its applications in the three aspects of chip, integrated circuit fault diagnosis and circuit design optimization is discussed, and the relationship between artificial intelligence technology and integrated circuit is reflected. Finally, it is concluded that the cross research and application of integrated circuit and artificial intelligence technology will have an important impact on the level of science and technology and the level of human social life.
Design and implementation of dynamic teaching model of diesel engine based on 3D printing technology
Authors: Chen Ping , Zhang Tao , Zhang Bin , Luo Li 
Published: September 2021

Abstract
In view of the shortage of models of practical installation and teaching AIDS in the teaching and training of traditional naval ship diesel engines, the 3D printing technology is integrated with the educational concept of this course, and a multi-functional diesel engine teaching AIDS model suitable for classroom teaching is designed and manufactured, and its design method and process are expounded. A set of models of diesel engine teaching AIDS are designed and manufactured by using this method and applied in classroom teaching. The teaching effect is good, the learners’ enthusiasm is stimulated, and the teaching and training quality is improved.
Research on Big Data Acquisition Bus Technology of NC Machine Tool
Authors: Li Jindong 
Published: September 2021

Abstract
Big data technology has strongly promoted the development of social productive forces, and commercial applications are continuously expanding in all walks of life. It also uses the power of Internet technology to provide strong technical support for the development of the entire industry. In terms of the production of CNC machine tools, due to the use of big data technology, CNC machine tools have been rapidly produced on a large scale, which has played an important role in the upgrading of the entire CNC machine tools and the improvement of quality and efficiency. This article takes the technology of big data acquisition bus for CNC machine tools as the topic, through researching and discussing its concept, meaning and related strategies, in order to effectively improve the production scale and reference.
Chinese Library Classification number : TP23 Document Identification code : A
Load Boundary Analysis of the Load-sensing Hydraulic System with Multi-way Valve and Pressure-compensated Valve
Authors: Luo Li , Yang Kun , Zhao Jianhua , Wang Yin , Song Fei 
Published: September 2021

Abstract
According to the analysis on the working principle of the load-sensing hydraulic system with multi-way valve and constant-difference relief pressure-compensated valve in the load-sensing circuit, it is concluded that there are two working conditions during the operation of the system, load-sensing condition and constant pressure supply condition. Without considering the effect of balance valves, the load boundaries of the forward and backward motion of two conditions were derived, as well as the whole load boundary. The selection principle of balance valves was studied and analyzed to expand the load boundaries. The above conclusions can be applied to this type of load-sensing hydraulic system with any valve-controlled cylinder structure and also provide the theoretical guidance for the design and apply of the system.
Reliability Analysis of Brake-by-wire Systems on Fault Tree
Authors: Zhang Ce , Han Yu , Lin Yier , Wang Dan 
Published: September 2021

Abstract
Brake-by-wire (BBW) system is the key system to ensure the safety and stability control of intelligent vehicle chassis. How to evaluate the BBW systems to meet the safety design requirements is one of the important links of system design. This article takes the BBW system as an example to illustrate the basic process of the safety assessment of intelligent vehicle. The fault tree analysis (FTA) method is used to quantitatively evaluate the failure status of the complete loss of the main brake function, and the fault tree analysis process is detailed. The results show that FTA plays an important role in guiding the design of system architecture. With the help of the importance index, we can quickly find out the weaknesses in the system architecture, when the probability of the failure state of the automobile brake-by-wire system cannot meet the ASIL requirements. Furthermore, effective countermeasures can be taken to optimize the design of the system architecture. Finally, the failure probability corresponding to the failure state of the car’s brake-by-wire system is reduced to 7×10-14.
Overheat fault analysis of drillship electric winch drive system
Authors: Kou Xinghua , Li Lili , Wang Wanli 
Published: September 2021

Abstract
In order to solve the problem of winch motor overheating, this paper analyzes the possible reasons of motor overheating along with the structure and principle of drillship winch. Taking the overheating fault of drillship’s driving motor as the top event, the fault tree model of the overheating problem of the driving motor is established, and the relative weak links of the winch are found out through the minimum cut set. With the result of fault tree analysis as a guide, the lifting device was inspected, the fault reason of the lifting device was found out, and the corresponding solutions were put forward. The results show that the proposed method in the paper can improve the efficiency of fault location.
Research on the Troubleshooting of “Yanmar 6EY26L” Diesel Generator
Authors: Li Tinglang 
Published: September 2021

Abstract
The Flying Accident of marine generator is not common. If the flying accident happens in the power grid, it will easily cause the whole ship power loss and engine damage, which will have a great influence on the safe navigation of ships. this paper analyzes and probes into the causes of the flying car accident occurred in 2019 in a round of “Yanmar 6EY26L” type diesel generator, and expounds the correct treatment measures for the flying car according to the treatment methods of the ships, finally, the daily management method of ship diesel generator, the precautions and preventive measures during diesel generator start-up are put forward in order to avoid similar accidents.
Sensitivity estimates for diffuse, point-like, and extended neutrino sources with KM3NeT/ARCA
Authors: Caiffi B. , Garcia Soto A. , Heijboer A. , Kulikovskiy V. , Muller R.S. , Sanguineti M. 
Published: September 2021

Abstract
The identification of cosmic objects emitting high energy neutrinos could provide new insights about the Universe and its active sources. The existence of these cosmic neutrinos has been proven by the IceCube Collaboration, but the big question of which sources these neutrinos originate from, remains unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA), with a cubic kilometer instrumented volume, is currently being built in the Mediterranean Sea. It will excel at identifying cosmic neutrino sources due to its unprecedented angular resolution for muon neutrinos (< 0.2 degree for E > 10 TeV events). KM3NeT has a view of the sky complementary to IceCube, and is sensitive to neutrinos across a wide range of energies. In order to identify the signature of cosmic neutrino sources in the background of atmospheric neutrinos and muons, statistical methods are being developed and tested with Monte-Carlo pseudo-experiments. This contribution presents the most recent sensitivity estimates for diffuse, point-like, and extended neutrino sources with KM3NeT/ARCA.
CRISPR/Cas9-mediated disruption of the PYRROLIDINE KETIDE SYNTHASE gene reduces the accumulation of tropane alkaloids in Atropa belladonna hairy roots
Authors: Hasebe Fumihito , Yuba Honoka , Hashimoto Takashi , Saito Kazuki , Funa Nobutaka , Shoji Tsubasa 
Published: September 2021

ABSTRACT
Tropane alkaloids, including clinically important hyoscyamine and scopolamine, are produced in the roots of medicinal plant species, such as Atropa belladonna, from the Solanaceae family. Recent molecular and genomic approaches have advanced our understanding of the metabolic enzymes involved in tropane alkaloid biosynthesis. A noncanonical type III polyketide synthase, pyrrolidine ketide synthase (PYKS) catalyzes a two-step decarboxylative reaction, which involves imine–ketide condensation indispensable to tropane skeleton construction. In this study, we generated pyks mutant A. belladonna hairy roots via CRISPR/Cas9-mediated genome editing and analyzed the metabolic consequences of the loss of PYKS activity on tropane alkaloids, providing insights into a crucial role of the scaffold-forming reaction in the biosynthetic pathway.
Clinical validation and evaluation of a novel six-lead handheld electrocardiogram recorder compared to the 12-lead electrocardiogram in unselected cardiology patients (EVALECG Cardio)
Authors: Azram Mohammad , Ahmed Noura , Leese Lucy , Brigham Matthew , Bowes Robert , Wheatcroft Stephen B , Ngantcha Marcus , Stegemann Berthold , Crowther George , Tayebjee Muzahir H 
Published: September 2021

AbstractAimsHandheld electrocardiogram (ECG) monitors are increasingly used by both healthcare workers and patients to diagnose cardiac arrhythmias. There is a lack of studies validating the use of handheld devices against the standard 12-lead ECG. The Kardia 6L is a novel handheld ECG monitor which can produce a 6-lead ECG. In this study, we compare the 6L ECG against the 12-lead ECG.Methods and resultsA prospective study consisting of unselected cardiac inpatients and outpatients at Leeds Teaching Hospital NHS Trust. All participants had a 12- and 6-lead ECGs. All ECG parameters were analysed by using a standard method template for consistency between independent observers. Electrocardiograms from the recorders were compared by the following statistical methods: linear regression, Bland–Altman, receiver operator curve, and kappa analysis. There were 1015 patients recruited. The mean differences between recorders were small for PR, QRS, cardiac axis, with receiver operator analysis area under the curve (AUC) of &gt;80%. Mean differences for QT and QTc (between recorders) were also small, with AUCs for QT leads of &gt;75% and AUCs for QTc leads of &gt;60%. Key findings from Bland–Altman analysis demonstrate overall an acceptable agreement with few outliers instances (&lt;6%, Bland–Altman analysis).ConclusionSeveral parameters recorded by the Kardia 6L (QT interval in all six leads, rhythm detection, PR interval, QRS duration, and cardiac axis) perform closely to the gold standard 12-lead ECG. However, that consistency weakens for left ventricular hypertrophy, QRS amplitudes (Lead I and AVL), and ischaemic changes.