bluuebunny/crossref_metadata_2025_split huggingface dataset:
Bert-based Siamese Network for Semantic Similarity
Authors: Feifei Xu , Shuting Zheng , Yu Tian 
Published: December 2020

Abstract
As a key technology in the field of natural language processing, text matching is widely used in many tasks such as question answering systems, search, recommendation, and advertising. Aiming at the insufficient feature extraction capabilities of traditional Siamese-based text matching methods, a fast matching method based on large-scale pre-training model BSSM (BERT based Siamese Semantic Model) is proposed. The proposed method uses a pre-training model to encode two texts separately, which interact the representation vectors of the two texts to obtain attention weights and generate new representation vectors, so that the new and old representation vectors can be pooled and aggregated, and finally two representation vectors are concatenated in some strategy and sent to the prediction layer for prediction. Experimental results on the AFQMC and LCQMC datasets show that the proposed method not only improves the accuracy rate, but also improves the computational efficiency.
Explore the development direction of mobile communication network optimization
Authors: Feng Yuan 
Published: December 2020

Abstract
Based on the purpose of promoting the better development of mobile communication network, this paper makes a simple discussion on this topic, puts forward optimization methods and technologies, and looks forward to the future development direction. First of all, the development status of mobile communication network is analyzed. Secondly, taking mobile communication 4G network as an example, the key technologies and methods of network optimization are discussed. Finally, combined with the development of mobile communication network, the development direction of network optimization is prospected. People’s requirements for mobile communication network services are constantly improving, and the exploration of network optimization is always on-going. We should focus on the modernization of mobile communication network.
CNN-based Image Recognition and Processing Technology Development of Airborne Display and Control System
Authors: He Jinsong , Li Xiaojun , Xiao Jia 
Published: December 2020

Abstract
The test system is designed for the MDU unit of the airborne display and control subsystem, and the test software is developed based on LabVIEW. The CNN image recognition and processing technology is used to realize the image recognition and test functions of the MDU unit. The image data collection system collects 8 channels of analog signals, converts the data collected in each channel, and then outputs the whole image, so as to obtain a complete frame of image information, combined with the threshold shrinkage and the two coefficients of noise pollution by judging the degree of noise pollution image noise reduction processing, image text recognition processing based on CNN and image CNN model training. Experimental results show that the test system can successfully realize the functions of recognition, analysis, detection and processing of displayed images.
Performance analysis of data fusion schemes in cooperative spectrum sensing for cognitive radio networks
Authors: Chen Gaoyu , Wang Haijun , Wan Runze 
Published: December 2020

Abstract
In the actual communication environment, the accuracy of spectrum detection is easily affected by the uncertainty factors such as multipath fading, shadow effect, hidden terminal, channel signal-to-noise ratio, and noise variance fluctuation. Cooperative spectrum sensing technology makes full use of the spatial gain generated by sensor nodes in different geographical locations, and obtains more accurate combination decision results than single node decision. In cooperative sensing, fusion center (FC) will analyze and process the collected local detection statistics or sensing results according to a certain data fusion rule, and make the final decision on the current channel state according to the fusion results. Data fusion strategy plays an important role in perception results and system reliability. In this paper, we summarize several conventional data fusion schemes in cooperative spectrum sensing for cognitive radio networks and conduct performance analysis.
Optimization communication for BFS based on 1D-partition
Authors: Liu Chengyao 
Published: December 2020

Abstract
Parallel Breadth First Search (BFS) is a famous algorithm in Graph500, a benchmark function for evaluating data-intensive applications on supercomputers. For parallel breadth first search (BFS) algorithms on large-scale distributed memory systems, the cost of communication is usually much higher than the arithmetic cost, which limits the scalability of the algorithm. However, the specific communication model of Graph500 brings challenges to computing in large-scale graphs. First, we use an adjustment method to delete redundant data in messages. Second, a data compression method was used to further reduce comm-unication. Evaluation results show that the performance of this method is more efficient than graph500 benchmark.
Research on the Scenario-based Development Strategy of Live Broadcast in the Era of Mobile Internet
Authors: Guo Wei , Zhang Bo 
Published: December 2020

Abstract
Based on the change of information transmission form and interactive mode, this paper will introduce the concept of scene-based precise communication in the network live broadcast Based on the analysis of the current situation of the network live broadcast platform, this paper focuses on the construction of the network live broadcast scene from the aspects of technology, content and users The ultimate goal of scene analysis is to understand the logic and habits of users’ behavior, and to better serve the audience.
Application of PLC technology in electrical automatic control
Authors: Zhipeng Lin , Xuejiao Lv , Jiwei Ma 
Published: December 2020

Abstract
at present, the development of electrical engineering automation has been very mature, in which the progress and breakthrough of PLC technology is very significant, and its value and role in electrical automation control are becoming more and more critical. In this paper, the application of PLC technology in electrical automatic control is further explored, and the application of PLC technology in electrical automatic control is analyzed in detail.
Modeling and simulation of three-phase 6/4 switched reluctance motor speed control system
Authors: Bian Huihui , Chen Hua , Wang Ronghua 
Published: December 2020

Abstract
To improve the response ability of the motor and reduce the torque ripple, we take the three-phase 6/4 SRM as the research object, according to the structure and characteristics of the SRM speed control system, the SRM speed and current double closed-loop control system are established and the current chopping control mode is adopted to change the motor speed. According to the mathematical model of SRM, then the model of each module of the speed control system is established by Matlab/Simulink. The simulation and performance analysis are carried out. The results show that the simulation model double closed loop control method can improve the system response ability, improve the stability of the motor and reduce the torque ripple.
Design of temperature control system for infant radiant warmer based on Kalman filter-fuzzy PID
Authors: Jin Aiguo , Wu Haixiao , Zhu Haosheng , Hua Hua , Hu Yanhai 
Published: December 2020

Abstract
In order to improve the dynamic and static performance of the temperature control system of the baby radiant warmer, a Kalman filter-fuzzy PID (KFPID)algorithm is proposed on the basis of the ordinary incremental PID control algorithm. The system uses STM32 as the main controller. The temperature data is collected by the TLV2548 analog-to-digital conversion chip, and the feedback data is filtered by Kalman filter, and the bed surface of the warming table is controlled by the fuzzy PID control algorithm. After the simulation of Matlab, it can be seen that compared with the traditional PID temperature control algorithm, the KFPID algorithm has the characteristics of short adjustment time and almost zero overshoot, and the steady-state error is smaller when dealing with the same interference noise.
Design of Frequency Reconfigurable Antenna for WLAN/Bluetooth/WiMAX
Authors: Liu Guijie , Cao Liping , Wang Liang , Liu Xiaoni , Du Fengjuan , Li Yuanyuan , Liu Yali , Sun Xubao 
Published: December 2020

Abstract
A reconfigurable frequency antenna which can be switched in two frequency bands is designed. The antenna is composed of a rectangular patch, a diode switch and a rectangular ground plate, and the size is 30×30×1.6mm3. The antenna changes the length of the branch through the diode switch to achieve the antenna model conversion. Simulation results show that the antenna S11<-10dB in the two frequency bands of 2.32∼2.60GHz and 3.27∼3.60GHz, covering WLAN (2.4∼2.48GHz), Bluetooth (2.4∼2.483GHz) and WiMAX (3.4∼3.6 GHz) communication frequency bands.
Design simulation and analysis of deep-sea transducer
Authors: Su Wei , Yu Yanting , Zhang Chao , Sun Yang , Gong Jinlong 
Published: December 2020

Abstract
Aiming at the design limitations of current deep-sea transducers, this paper designs and manufactures a deep-sea transducer based on the theoretical analysis of the characteristics of the piezo ring. This transducer is potted and vulcanized into a solid structure with sound-permeable rubber. As a result, not only the deep water pressure resistance is achieved, but also the operating frequency range is broadened by the high-low order coupling vibration between the piezo ring and the sound-permeable rubber. The influences of the main parameters on the electroacoustic characteristics of the transducer are analyzed in detail by FEM. Prototypes are developed subsequently. The measured results show that the simulation and measured results have high consistency. The maximum working depth of the transducer can reach 10000 m, and the beam direction is omnidirectional in the upper hemisphere. In the frequency range of 7∼20 kHz, the transmitter voltage response is higher than 120dB, and the receiver sensitivity is greater than -200dB. This research indicates that the transducer has excellent deep-water characteristic and transmit-receive performance.
Advances in industrial robots programming applying gestural guidance techniques
Authors: Padilla A F , Peña C A , Moreno-Contreras G G 
Published: December 2020

Abstract
In this article, artificial vision is presented as an application for the generation of trajectories through the capture of an operator’s movements using a structured light camera (Kinect) and applying a recognition algorithm to the body’s joints, a three-dimensional representation is made of the skeleton, taking as points of interest the articulation of the left hand to generate the gestural commands and the right hand to indicate the path that the robot must execute. Simulation results are obtained through a development environment where the kinematic model of the robot is incorporated, this indicates that it is possible to generate a trajectory through the human body using artificial vision.
Analysis of the intensity of electromagnetic radiation for the estimation of vegetation cover
Authors: Pelaez D A , Gualdron O E , Castellanos L 
Published: December 2020

Abstract
The remote monitoring of electromagnetic radiation allows to differentiate the behavior of five different wavelengths that are shown as images in their respective visible and non-visible light spectral, these are subjected to a processing in which it is calculated for each pixel using the red band and near infrared the normalized difference vegetation index, with which a multispectral orthophoto mosaic is generated which is later analyzed with the objective of estimate the quantity and quality of vegetation of 15 hectares of different properties in the municipality of Tuta in the department of Boyacá, Colombia, that they possess with a high productive potential and in which the process of information acquisition was carried out before and after proceeding with the implementation of crops with a previous agroecological model, Later, a statistical analysis was carried out using polynomial trend models, and this remote inspection system identified that the behavior of radiation intensities at different wavelengths is associated with variable vegetation densities and, indirectly, with the presence of water stress and the quality of the shrubs and plants.
Computer sciences applied to the sustainability of projects
Authors: Velásquez-Pérez T , Castro-Silva H F , Quijano-Brand L F 
Published: December 2020

Abstract
Computer science incorporates information theory that is a fundamental element in project management. Achieving the conservation of the current resources for future generations has become an increasingly important and urgent challenge for our society. Thus, the sustainability topic becomes more valid on the agenda of governments and organizations. This cross-section empirical study presents partial results of the perception of a representative sample of engineering project managers in Colombia about the implementation of sustainability elements in the management of these projects, established in the sustainable project management maturity model. The results applying information science, indicate a greater orientation towards the aspects of product sustainability than the project process and in general that in the studied context, the economic dimension significantly predominates over social and environmental aspects.
Development of a three-bladed horizontal axis wind turbine with active control by using a programmable logic controller
Authors: Barrera J , Durán C 
Published: December 2020

Abstract
For the increasing the physical efficiency, useful life and avoid accidents in wind turbines, it is very useful to implement a pitch control on the blades that help as an aerodynamic brake and orientation in the base to follow the wind direction. The main goal of this paper was to develop a digital controller on the wind turbine blades that allows to keep the constant angular velocity and monitor the orientation of the wind. A computer-aided design software was developed for allowing the aerodynamic analysis by using Solid Works® software based on a flow simulation tool. On the other hand, a MATLAB model was created employing Simulink tool and the Simscape toolbox with typical data from a 2MW wind turbine whereas the electrical and mechanical dynamics and control feedback were calculated having as input parameters the wind direction and speed. Consequently, a prototype was designed in 3D which was implemented to make the different tests. For lab experimentation, a fuzzy control algorithm was developed in structured control language and then implemented using the S7-1200 PLC. The trials with programmable logic controller and the fuzzy algorithm were satisfactory, which could be a basis for the optimization of the performance of a three-bladed horizontal axis wind turbine.
Novel integrated agricultural land management approach provides sustainable biomass feedstocks for bioplastics and supports the UK’s ‘net-zero’ target
Authors: Ni Yuanzhi , Richter Goetz M , Mwabonje Onesmus N , Qi Aiming , Patel Martin K , Woods Jeremy 
Published: December 2020

Abstract
We investigate the potential in producing biodegradable bio-plastics to support the emergent ‘net-zero’ greenhouse gas (GHG) emissions targets in the UK. A ‘cradle to grave’ life cycle assessment was developed to evaluate GHG mitigation potentials of bio-based polybutylene succinate plastics produced from wheat straw-only (single feedstock) or wheat straw plus Miscanthus (mixed feedstocks) agricultural supply systems. For scenarios using mixed feedstocks, significant carbon mitigation potentials were identified at catchment and national levels (emission reduction of 30 kg CO2eq kg−1 plastic compared to petroleum-based alternatives), making the system studied a significant net carbon sink at marginal GHG abatement costs of £0.5–14.9 t−1 CO2eq. We show that an effective ‘net-zero’ transition of the UK’s agricultural sector needs spatially explicit, diversified and integrated cropping strategies. Such integration of perennial bio-materials into food production systems can unlock cost-effective terrestrial carbon sequestration. Research & Development and scale-up will lower costs helping deliver a sustainable bioeconomy and transition to ‘net-zero’.
Residential environments across Denmark have become both denser and greener over 20 years
Authors: Samuelsson Karl , Chen Tzu-Hsin Karen , Antonsen Sussie , Brandt S Anders , Sabel Clive , Barthel Stephan 
Published: December 2020

Abstract
Despite much attention in the literature, knowledge about the dynamics surrounding urban densification and urban greening is still in dire need for architects, urban planners and scientists that strive to design, develop, and regenerate sustainable and resilient urban environments. Here, we investigate countrywide patterns of changes in residential density and residential nature at high spatial resolution over a time period of >20 years (1995–2016), combining a dataset of address-level population data covering all of Denmark (>2 million address points) with satellite image-derived normalised difference vegetation index (NDVI) data. Our results show that many residential environments across Denmark have witnessed simultaneous densification and greening since the mid-1990s. In fact, the most common change within 500 m neighbourhoods around individual address points is of joint increases in population and NDVI (28%), followed by increasing NDVI with stable population figures (21%). In contrast, only 8% of neighbourhoods around address points have seen a decline in either population or NDVI. Results were similar in low- middle- and high-density environments, suggesting that trends were driven by climate change but also to some degree enabled by urban planning policies that seek to increase rather than decrease nature in the cities.
Heat treatment effect on structural and elastic characteristics of a single-component abrasive tool
Authors: Polyanchikova M Yu , Nosenko V A , Kozhevnikova A A 
Published: December 2020

Abstract
The article presents the results of a research of elastic properties of a bondless single-component abrasive tool (SCAT) after sintering. The method of determining the modulus of elongation and porosity based on theoretical and experimental data is used. The dependency between the modulus of elongation and porosity, as well as experimental formulas indicating these dependencies, are presented. Based on the experimental and calculated data on the magnitude of the modulus of elongation, depending on the sintering temperature and the size of the abrasive grains in the initial abrasive compound, empirical dependencies of the elastic characteristics are determined in order to predict the production of a bondless tool with predetermined properties.
Unbalances formation of the textured wheel at preparation to grinding process
Authors: Gusev Vladimir 
Published: December 2020

Abstract
The entrance factors of grinding processes of materials, affecting dynamic activity of a technological system, define exit indicators of processes: operation productivity, geometrical and physic-mechanical indicators of quality of the processed blanket, etc. One of such dominating factors is unbalance of quickly rotating grinding wheel, which role continuously increases in connection with a current trend of increase of cutting speed. Formation of the main vector of unbalances of the textured grinding wheel during his preparation to work is analysed. The mathematical model of unbalances, caused by errors of production of abrasive cutting elements, their assembly with the metal case, installation of the tool on a spindle, and also by uneven removal of abrasive material in the course of its first editing, is developed. On the basis of the established mathematical model the numerical values of unbalances of the textured grinding tool are defined and the recommendations, providing values of the main vector of the imbalances, regulated by the standard, are developed. The results of researches are necessary for high-quality design of the textured grinding wheels, intended for grinding of responsible surfaces.
Efficiency of the continuous editing process grinding circles
Authors: Salova D P , Denisenko A F , Salov P M , Grishin R G 
Published: December 2020

Abstract
Conducted experimental studies have shown the high efficiency of using continuous dressing and its varieties - cleaning during grinding. The conditions that ensure the minimum wear of the ruling and working circles for various processing conditions are determined. It is established that the minimum wear of the circles takes place at a relative speed of the working and ruling circles, close to zero. At the same time, the productivity of the dressing process and the processing efficiency are practically not reduced. It is shown that the greatest efficiency of continuous dressing takes place when grinding materials that are prone to adhesive setting with the components of the abrasive wheel. Recommendations are given on choosing the ligament and firmness of the ruling circles. The mechanisms of wear of the circles at various slip coefficients are established. Ensuring the angle of intersection between the circles, as a rule, increases the efficiency of the process, in addition, reduces vibration in the editing system. An increase in the angle of crossing over 10° increases the wear of the circles. The use of continuous cleaning reduces wear on the working circle and does not distort its macro profile. It was found that the ruling circles with an abrasive, which was created using the technology of self-propagating high-temperature synthesis (SHS), have greater wear resistance than circles of a similar characteristic from elbor, but inferior to diamond.
Mathematical model of allowance removal at nonabrasive processing of bearing details
Authors: Reshetnikov M K , Davidenko O Y , Shpilev V V , Zakharchenko M Y 
Published: December 2020

Abstract
To increase the durability of the bearing, it is necessary to achieve a profile shape of the groove of the bearing close to that obtained during running-in. This effect allows you to achieve a method of non-abrasive tuning of the raceways of the rings of roller bearings. To study the effectiveness of this method, it is necessary at the initial stage to build a mathematical model of metal removal from the treated surface. To derive the mathematical model, we used the energy theory of friction, the theory of elasticity, and the physical theory of similarity. After the conclusion of the model, you can see which factors have the greatest impact on the efficiency of the process of non-abrasive tuning of the raceways of the roller bearing rings.
Numerical simulation of turning contact temperatures with varying material yield strength and tool wear
Authors: Unyanin A N , Finageev P R 
Published: December 2020

Abstract
The results of numerical simulation the main component of cutting forces and temperatures at the contact zones of the face of the cutter with chip and flank with the workpiece depending on the tool wear and physico-mechanical properties of the workpiece material. The values of fluctuations in the cutting force and contact temperatures are determined depending on the variation of the stress yield of the workpiece material during machining of the workpieces material when processing workpieces made of steel 45 and steel 12KH18N10T are established. The degree of influence of tool wear on the flank on cutting forces and contact temperatures is determined.