bluuebunny/crossref_metadata_2025_split huggingface dataset:
Three-dimensional finite element simulation of high speed milling of titanium alloy Ti6Al4V
Authors: Wang Zhenda , Ze Xiangbo , Yousuf Yusuf Abudllahi , Jiang Zhenfeng , Fu Xiuli , Pan Yongzhi 
Published: June 2021

Abstract
In this paper, ABAQUS finite element simulation software was used to establish a more reliable three-dimensional milling titanium alloy Ti6Al4V finite element simulation model. This model sets up important links such as the material constitutive model, the tool-chip contact friction model, and the chip separation criterion. And the accuracy of the model is verified by experiments. Based on this model, orthogonal experiment was used to explore the effects of axial cutting depth, tool speed and feed speed on the milling force. And the morphology of the chip and the surface morphology of the machined workpiece were investigated. The results show that the influence of cutting parameters on milling force from high to low is as follows: axial cutting depth > tool speed > feed rate. The change of cutting parameters has different influence on milling force in all directions, and has the largest influence on milling force in X direction.
An experiment study on deterioration of dynamic rotational accuracy of motorized spindle
Authors: Hu GF , Jia CM , Fang Y , Lv SL , Zhang Y 
Published: June 2021

Abstract
High-speed precision spindle is one of the core functional components of CNC machine tools, and its life is the key bottleneck factor restricting the reliability of CNC equipment made in China. So far, the research on the life of motorized spindle is still in the initial stage, and lacks a systematic and complete theoretical support. Motorized spindle is a typical product with high reliability and long life, and it is difficult to have faults or obvious performance degradation in the limited test time, so the traditional reliability evaluation method based on statistical theory is not effective. Therefore, it is of great significance for the reasonable evaluation of the reliability level of motorized spindle to carry out the test technology research on the impact force and life of motorized spindle. In this paper, the spindle alternating load test device is developed. The relationship between alternating impact load and spindle precision retention is studied experimentally. Taking spindle rotation accuracy as the main assessment factor, the mapping relationship between alternating impact load and spindle system life was established.
Effect of Magnetic Field on Dynamics of 5% Propane/Air Premixed Gases
Authors: Yang Xigang , Hu Shoutao , Wang Le , Sun Xu , Hong Zijin , Li Ruxia , Shi Huiwen , Gao Jiancun 
Published: June 2021

Abstract
Under applying the gradient electromagnetic field of 2100Gs-3300Gs, the explosion pressure and the propagation velocity of the explosion flame of 5% propane/air premixed gases were studied experimentally. The experimental results showed that the gradient electromagnetic field suppressed the explosion overpressure and explosion flame propagation velocity. When applied the gradient electromagnetic field, the peak propane explosion pressure decreased by 26KPa and the explosion flame propagation velocity decreased by 1.54269m/s. In other words, the gradient electromagnetic field suppressed the increase of pressure shock waves and light waves. Through the numerical simulation of propane explosion reaction, it is inferred that electromagnetic field mainly inhibits propane explosion pressure and explosion flame propagation speed by affecting the reactions of • H, • O and • OH radicals.
Research on silent steady flow quick closing check valve for rail vehicle
Authors: Zhang Xuan , Xu BuDu , Zhang ShiXi , Li QingXuan , Mou ZhenYu 
Published: June 2021

Abstract
a kind of air valve which can prevent gas backflow is used in the track air supply system. Check valve is the basic component of fluid control engineering, which is widely used. It plays a role in determining the direction of fluid flow, protecting other fluid machinery and pipeline safety by preventing the reverse flow of fluid[1]. For example, drilling tool check valves commonly used in oil fields include arrow type valve, float valve and input type check valve [2-3]. The check valve developed by our company is mainly used for gas medium, suitable for high-pressure gas transmission, and plays the role of preventing gas backflow.
Research on Flow and Condensation Heat Transfer Coefficient of multi-channel cylinder dryer in U-shaped Section
Authors: yan Dong , Ji-xian Dong , Li-jie Qiao 
Published: June 2021

Abstract
The cylinder dryer is the most energy-consuming part of the papermaking drying section. Whether the drying cylinder can effectively drain the drying cylinder affects the drying efficiency of the drying cylinder. The design of the multi-channel drying cylinder effectively improves the problem of the difficulty of the water accumulation discharge. In order to obtain a channel cross-sectional shape with better drainage and better heat transfer, two channels with different cross-sectional shapes are selected to study the flow and heat transfer of steam in this experiment. The changes of the channel heat transfer coefficient under different working conditions are studied and compared. The result show that the U-shaped channel heat transfer effect is better than that of other shape channels in the multi-channel dryer.
Analysis of dynamic characteristics of thin-walled parts based on finite element method
Authors: Jiang HT , Jin G , Zhang XY , Sun GX 
Published: June 2021

Abstract
In order to study the stiffness and dynamic characteristics of thin-walled parts of different types and sizes, this paper is based on the finite element method for modal analysis of thin-walled flat parts and thin-walled curved parts. According to the first four natural frequencies and mode shapes of thin-walled parts under different height and thickness parameters, a frequency comparison chart of thin-walled parts with different heights and thicknesses was drawn, and the influence of different types of thin-walled parts and different heights and thicknesses on the frequency and vibration mode of thin-walled parts was obtained. Experimental results show: (1) With the thickness increases, the natural frequency of thin-walled parts gradually increases and with the height increases, the natural frequency of thin-walled parts gradually decreases; (2) Under the same height and thickness, the natural frequency of curved thin-walled parts is greater than that of flat thin-walled parts; 3) The change of the height and thickness of the thin-walled parts has a greater influence on the frequency changes of the flat thin-walled parts than on the curved thin-walled parts
Development technology of moon bag process template for knitted sports pants
Authors: Yin Xue-Feng , Lu-Ni  , Fu Ju-Fen 
Published: June 2021

Abstract
Clothing technology template is a special auxiliary clothing production tool, and it is a new mode of clothing production. The development of garment template technology is more and more extensive, but it is less used in knitted garments. Based on the theory of garment process template, this paper takes the moon bag of knitted sports pants as the research object, and uses jingwei garment template professional software to design its template, then cuts and assembles the template, so as to solve the demand of garment enterprises for high-quality products and high-tech personnel.
Interface damage analysis of composite hat-stiffened panels
Authors: Wang Tao , Bai Ruixiang , Wei Changlong , Huang Xiaodi , Bai Heshan 
Published: June 2021

Abstract
In order to reveal the mechanism of interfacial debonding damage of composite hat-stiffened panel, an eight-point bending model of single stiffened structure was designed. The finite element analysis was carried out by using the cohesive element to simulate debonding damage of interface between skin and rib. The deformation, interface stress and structural damage of the eight-point bending as well as the corresponding stiffened panel under axial compression were analyzed. The results showed that the initial debonding deformation was in good agreement with the interface stress distribution. For the eight-point bending model, although more damage appeared near the loading point due to stress concentration, it had little effect on the accurate prediction of interface damage behavior. The eight-point bending model can be used to evaluate the interface performance of corresponding multi-stiffened-panel during axial compression buckling by accurate simulation and parameter design, and it is helpful for the stiffness matching design of skin and stiffener.
Dynamic mechanical behavior and microstructure evolution of 7A52-T6 alloy at elevated temperatures
Authors: Yang Bing , Zhou Honggang , Liu Zicong , Huang Hao , Liu Wenhui 
Published: June 2021

Abstract
Dynamic mechanical behavior and microstructural evolution of 7A52-T6 aluminum alloy were investigated at elevated temperatures ranging from 150 to 350°C and strain rates ranging from 2000s−1 to 5000s−1 using a compressive hospitalization pressure bar (SHPB) system. The results show that 7A52 aluminum alloy has obvious temperature sensitivity, but the sensitivity to strain rate is weak. The effects of temperature on the microstructure of 7A52 aluminum alloy are significant, and the dislocation density decreases with the increase of temperature. With the increase of impact temperature, some of the η’ phases are dissolved, and some of them are transformed into η phases. This study in general provides a significant understanding on the relationship between microstructure evolution and mechanical behavior of 7A52-T6 aluminum alloy under dynamic loading and at elevated temperature.
Analysis of Research Situation of Wireless transmission of the Internet of Things Based on Bibliometrics
Authors: Qin Hui-Xian , Hao Yong , Miao Jing-Gang 
Published: June 2021

Abstract
In order to objectively analyze the development of wireless transmission research of the Internet of things, and provide reliable data reference for researchers and decision-makers of wireless transmission of the Internet of Things, this paper adopts the bibliometric method and selects web of science database to analyze the number of papers and citations of countries, authors, publishing organizations, journals, and research contents of wireless transmission of the Internet of Things. A total of 15102 authors from 3843 organizations in 87 countries and regions, which include China, the United States, South Korea, and India, and 6105 articles published in 551 source publications were retrieved from Web of Science database. The research content involves the research focus, current development status, application scenarios, and future trends of the wireless transmission of the Internet of things. In terms of quantity, the most powerful country in the world is China, which has published 1912 papers, accounting for 31.319% of the total number of papers. At the same time, the research on wireless transmission of the Internet of Things is relatively active in China, with a wide distribution of research organizations, a large number of researchers, and the highest number of publications. Among the top 10 high-yield organizations, 7 are Chinese organizations, and some Chinese scholars have published the article has a high frequency of citations, but the number of results of different research directions is not balanced, and the research direction is more inclined to the direction of machinery, computer science and communication.
Application of inductance in the field of liquid level sensors
Authors: He Guoyu , Zhou Zongluan 
Published: June 2021

Abstract
Aiming at the application limitations of traditional inactive liquid level sensors (mainly ultrasonic and light waves), In this article, the relationship between inductance and medium is quantified in specific application scenarios, which can implement the functions of traditional liquid level sensors and solve different The influence of liquid composition and state on data, this research expands the application fields of liquid level sensors.
Modelling and simulation of deflection mechanism in rock drilling processing
Authors: Liu Zhong , Yang Neng , Xiong Zhonggang , Huo Jiabo , Wang Hanying 
Published: June 2021

Abstract
With the development of social economy, hydraulic drilling machine has been widely used in the tunnel bridge, water conservancy projects and mining. In the process of construction, the drill rod of the hydraulic rock borer in drilling perforating process will produce deviation. It is often caused by the drilling efficiency and reduces the drilling hole scrap, seriously hindered the development of construction technology of drilling and blasting. Through the hydraulic drilling machine drill rod in the drilling cutting process of force analysis, drill rod in horizontal and vertical direction of the mechanical model are established. The relationship between the drill rod force and deflection of drilling in the drilling process is derived. At the same time, build ADAMS mechanical model, and the drilling process is simulated to find the relationship between the depth of drilling and the offset and offset angle. On this basis, the mechanical mechanism of borehole deviation of hydraulic rock drill is clarified, which provides a theoretical basis for the hydraulic rock drill hole deviations.
Application of biosensors based on nanomaterials in cancer cell detection
Authors: Zhang Yizhou , Lyu Hongling 
Published: June 2021

Abstract
Cancer, killing millions of people every year, is the most serious disease in the world. The survival of cancer patients is closely related to the diagnosis of cancer cells. Therefore, in the early stage of cancer, the detection of cancer biomarkers from cellular level is of great significance to improve the survival rate of cancer patients. Nanomaterials-based biosensors play the increasingly important role in the treatment of cancer, owing to their ultra-high sensitivity and high selectivity. Nowadays, it is widely used in the detection of cancer cells to provide reference for cancer treatment. Herein, the present minireview summarizes application of nanomaterials-based biosensors for the detection of cancer cells, such as colorimetric biosensors, fluorescence biosensors, surface-enhanced Raman scattering (SERS) biosensors, electrochemical biosensors and other types of biosensors. We further introduce the construction principle of these biosensing methods, and compare the advantages of these biosensors in detecting cancer cells.
Research on Usability of the Toolbar of Teaching Interactive Smart Tablet
Authors: Li Jialin , Wang Junfeng , Hao Pingting 
Published: June 2021

Abstract
The work aims to find out the usability problems in the design of the toolbar of teaching interactive smart tablet, and provide an improvement basis and direction for improving the user experience of the teaching interactive smart tablet. Usability testing and user interview were used to research the toolbar of Seewo teaching interactive smart tablet. Quantitative analysis of task completion time, task success level and task completion efficiency were measured in usability testing. The thesis combines the results of user interviews with the results of usability testing to find out the specific factors that affect the usability of the toolbar of teaching interaction smart tablet. The icon design of the toolbar of teaching interactive smart tablet has a great impact on usability. The hiding of frequently used functions may make it difficult for users to find them. The larger screen makes it difficult to find icons outside the field of view. The usability of interactive smart tablet can be improved by improving icon recognition, optimizing common interactive processes, and setting important functions in the best visual field.
Study on band gap properties of asymmetric locally resonant complex phononic crystals
Authors: Zhao Yingchao , Yang Xiaodong 
Published: June 2021

Abstract
In this paper, the band structure and transmission characteristics of asymmetric locally resonant complex phononic crystals are studied. Based on the Bragg band gap mechanism, an asymmetric local resonance element was designed and the structural parameters were optimized to obtain a wide band gap. The results show that the range of the first complete band gap is obviously affected by the size of the scatterer, the radius and height of the locally resonant cylinder and the position of the cylinder. At the same time, the transmission characteristics of the 10*10 periodic arrangement structure are calculated to verify the accuracy of the energy band structure.
Bowl Surface Laser Forming Process of Stainless Steel Composite Plate
Authors: Wang Xiaogang , Shi Yongjun , Guo Yankuo 
Published: June 2021

Abstract
In this paper, the three-dimensional bowl surface was obtained by reasonably planning the radial heating path by taking the laser as the heat source and the stainless steel composite plate (06Cr19Ni10/1Cr17Mn6Ni5N/06Cr19Ni10) as the research object, and the forming process of the three-dimensional bowl surface was studied. It was found that the target surface bending forming obtained by inside-outside symmetric scanning strategy (Strategy d) had the highest accuracy. The plate deformation increased with the increase of laser power (P), increased then decreased with the increase of heating line length (L), and decreased with the increase of scanning speed (V). Moreover, the deformation was approximately linear with the number of repeated heating (N), with the optimal process conditions of P = 500W, V = 10 mm/s, L = 20 mm, N = 7. A three-dimensional thermodynamic coupling model of a three-layer composite plate was established and verified experimentally.
A small displacement torsor (SDT)-based haptic rendering model for assembly of bolted joints
Authors: Yong-Peng Yu , De-Jian Xu 
Published: June 2021

Abstract
Haptic interaction technology is increasingly used in virtual assembly training, assembly path planning, teleoperation assembly and other fields. Obviously, the key issue of haptic interaction technology is the realistic haptic rendering models. This paper proposes a haptic rendering model based on small displacement torsor (SDT) for bolt assembly. For the first time, geometrical errors of parts are considered in the haptic rendering model of bolt assembly, which can improve the fidelity. The comparative experiment proves that the haptic rendering model proposed in this paper is more familiar to the actual assembly than the existing model.
Modeling and Simulation of Vehicle Handling Stability Control Based on Tire Pressure
Authors: Bi-bao Guo , Tao Fu 
Published: June 2021

Abstract
In order to study the influence of tire pressure change on the control of vehicle handling stability, the seven-degree-of-freedom theoretical model of automobile dynamics and tire theoretical model considering tire pressure were established. Considering the double lane conditions, the control stability of automobile is simulated, and the influence of tire pressure change on the control stability of automobile is analyzed. The simulation results show that when the tire pressure is too high or too small, the yaw rate of the vehicle in the process of high speed steering cannot be stable, which reduces the vehicle handling stability.
Design of motor online monitoring system based on ARM
Authors: Zhai Yuyi , Jiang Houyong , Liu Yunjia , Jiang Tao , Wang Le 
Published: June 2021

Abstract
In order to monitor the operation status of motors accurately in real time, and realize the early warning of abnormal operation of motors, a motor online monitoring system based on ARM is designed. The system uses STM32F103ZET6 microcontroller based on ARM Cortex–M3 core as the control core to monitor the motor temperature, vibration, environmental temperature and humidity and other related parameters, which communicates with the upper computer through wireless transmission, and the upper computer completes data display, storage, processing and alarm. The results show that the motor online monitoring system based has the advantages of strong real-time performance, high measurement accuracy, high stability and long transmission distance.
Design of a General Monitoring Host Machine for Railway Trackside Equipment
Authors: Shi Long , Ma Junjie , Guo Haiwen 
Published: June 2021

Abstract
A large number of infrastructure and equipment are distributed along the railway, which will directly affect the safety and efficiency of railway transportation. In this paper, a general monitoring host machine for railway trackside equipment is designed to realize the power supply, automatic networking, logic operation centralized management, data collection, storage and processing of trackside equipment monitoring. The host machine consists of a CPU board, a interface board, a power board, several PLC (Power Line Carrier) communication boards and isolation transformers. It supports a variety of monitoring applications, and covers almost all monitoring requirements of trackside equipment. Based on the monitoring host machine, a monitoring system for trackside equipment of track circuit system is developed.
MLAF: Multi-Level Attention Fused Model for Sentence Similarity Measurement
Authors: Chen Mengya , Sun Xiaoqi 
Published: June 2021

Abstract
Semantic textual similarity measurement is an essential task in text mining and natural language processing, which has profound research value. Recent LSTM-based methods have achieved attractive success by modelling sentences as fixed-length vectors. However, since the LSTM network can only extract the semantic information of sentences sequentially, the longterm dependency of sentences cannot be efficiently captured when the sequence length is long. Moreover, current models treat each syntactic component in the sentence equally, while the effects of different syntactic elements to the sentence meaning expression are different. Generally, nouns, verbs, and adjectives contribute more than prepositions and conjunctions to the semantic meaning of the sentence. In this paper, we propose a multi-level attention fused (MLAF) model, which correlates self-attention and word attention with sentence representations, extracting the semantic information of sentences from different levels. The self-attention supplements sequential operations to model long-term dependency of sentences. The word attention built upon raw sentence highlights the vital syntactic components of sentences. Experiments on different datasets demonstrate that the proposed MLAF model has achieved significant improvements over baselines.
High absorption efficiency of WS2/CNTS hybrids with conductive network for high performance EMI shielding
Authors: Wang H H , Zhang D Q , Zhang H B , Liu T T , Xu J Y , Cao M S 
Published: June 2021

Abstract
In order to reduce the environmental pollution caused by the secondary reflection of electromagnetic interference (EMI) shielding materials, the WS2/CNTs hybrids with high absorption efficiency were successfully prepared by using a one-step hydrothermal method. The WS2/CNTs heterostructure, which combines the unique excellent dielectric properties of WS2 with the high conductivity of CNTs, promotes the effective absorption and reflection of EMW. The excellent EMI shielding performance of 5WS2/CNTs-25 can reach up to 27.8 dB, which was analyzed by the dielectric properties of the WS2/CNTs hybrids. The conductive network composed of CNTs makes the multiple reflection and absorption of EMW, which makes the WS2/CNTs hybrids promising candidates for the field of EMI shielding.
The Properties, Synthesis, and Medical Applications of Nanoscale Metal Organic Frameworks
Authors: Gu Yuling 
Published: June 2021

Abstract
Metal-organic frameworks (MOFs) are self-assembled nanomaterials formed from coordination bonds between metal cations and organic ligands. MOF-74 are a unique group of MOFs with large surface area and high loading capacity. Nanoscale MOF-74 have a great potential for drug loading and MRI scanning. This review summarizes the synthetic methods, properties, and medical applications of MOF-74.