bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on Compound Control Strategy of Dynamic Voltage Restorer
Authors: Guo Zhicheng 
Published: April 2021

Abstract
Dynamic voltage restorer (DVR) is an economical and effective device to suppress the voltage drop of the power grid. This paper establishes the equivalent circuit and mathematical model of the DVR. Aiming at the shortcomings of feedforward control and feedback control, a composite control strategy is adopted, feedforward control is introduced on the basis of feedback control, and the load adaptability and stability of composite control Perform analysis. Finally, MATLAB is used for simulation verification, and the results show that the compound control can meet the requirements of the DVR control system.
Assessment of vehicle comprehensive maintenance capability based on RBF neural network
Authors: Huang Dashan , Hu Yiming , jiang Wentao 
Published: April 2021

Abstract
To solve the problems of experience-based and subjective-based methods of capability assessment on vehicle maintenance, a RBF neural network model is established, which takes the 7 key factors of vehicle maintenance capability as input, and takes the comprehensive maintenance capability as output. The self-organization learning method and least-squares method are used to determine the weight parameters of RBF neural network, based on which the comprehensive maintenance capability method of vehicle is designed. Simulation results show that the final error of the trained RBF neural network is 0.0073, and the percentage errors of neural network calculated based on test samples are less than 5%, which indicates that the established RBF neural network could assess the comprehensive maintenance capability method of vehicle effectively, which means the neural network is more practical.
A competitive strategy of ball snatching for soccer robots
Authors: Liao Liefa , Lu Weiqing 
Published: April 2021

Abstract
During the movement of the soccer robot, the soccer robot is in a complex environment of real-time confrontation, which requires the robot to have a higher ability to cope with the real-time movement process. It is necessary to make reasonable countermeasures for each critical moment, such as the process of multi-robot grabbing. Many strategy studies only focus on the path planning of the single-robot ball control process, without considering the process of multi-robot competition, leading to the lack of some key steps in the entire motion process of the soccer robot, loss of integrity, and neglect of real-time confrontation. It is proposed to use WTA (Winner Take All) competition model to effectively solve the multirobot competition problem. The model is described by an ordinary differential equation. This paper verifies the correctness of the theory through simulation experiments, and also verifies the scientificity and practicality of the proposed theory. Laid the foundation for future practice in other scientific fields.
Video Static Foreground Detection Method for Desktop Robotic Arm
Authors: Wu Jianxin , Dai Liyun , Liu Zhiming 
Published: April 2021

Abstract
Although there are many efficient methods to detect the foreground from video frames, these methods are not completely applicable to the application scenario of desktop robotic arm. This paper presents a video static foreground detection method suitable for the desktop robotic arm application scenario. In our method, an auxiliary board is used to decrease false detection caused by camera-shake and work area movement, and to effectively eliminate non-target foreground interference such as human hands. In addition, with the auxiliary board we can also accurately calculate the 2-dimensional position and posture of the foreground. This method is general applicable to most desktop robotic arm application scenarios. Furthermore, compared with the traditional foreground detection method, this paper presents the 3-frames threshold method to solve the problem of multi-texture background environment appears many noise. What’s more, for the problem that it is difficult to classify when the foreground colors are similar to the background colors, this paper presents the difference degree to describe pixels.
Intelligent Vehicle Navigation System Based on Visual Detection and Positioning
Authors: Zhao Yurong , Lmg Yao , Xia Peng 
Published: April 2021

Abstract
This design is a set of intelligent vehicle navigation system which relies on visual detection and positioning. The image is processed and the coordinates of beacon and car body are extracted by the camera hanging above. The coordinate information is transmitted to the intelligent vehicle and fused with the intelligent vehicle data to determine its own environment and running state. The system integrates image processing, wireless communication and intelligent path planning to realize the task of accurate recognition and automatic tracing.
The prospect of using natural psychobitics in dairy products to stabilize the diet
Authors: Agarkova Y , Fedotova O , Chilikin A 
Published: April 2021

Abstract
The spread of coronavirus infection has caused a disturbance in the structure of the diet, including the priority consumption of convenience foods and fast food. It is known, that inappropriate nutrition contributes both to the disruption of metabolic processes in the body and creates the prerequisites for the aggravation of nervous disorders. The development of functional products based on synbiotics, the components of which ensure the normalization of the intestinal microbiome composition, can become a promising direction for the prevention of malnutrition. The basis for developments in this area is a review of research data confirming the importance of the human intestinal microflora in the regulation of vital functions and psychosomatic reactions of the body, in particular, mood and behavior. The prospect of using fermented milk products with pro- and prebiotic microorganisms and preparations based on them instead of chemical antidepressants is shown. The mechanism of action of psychobiotics, consisting in the formation of most of the nervous and immune systems due to microorganisms of targeted action and dietary fibers in food, in particular dairy, has been analyzed.
The formation of dairy cattle intrabreed type: Macropopulation aspects
Authors: Eremina I Yu , Gerasimova L A , Kuklina A I 
Published: April 2021

Abstract
The long-term changes in the phylogenetic population characteristics of nine herds of red-and-white dairy cattle of Krasnoyarskii Krai (Russia) in the process of breed formation were estimated. Immunogenetic indicators (erythrocyte antigens) were used. The genetic structure of the population was investigated according to the frequencies of antigenic factors, the frequencies of the phenogroups. The genesis of the formed breed features is outlined by the indicators of the genetic similarity between the crossed breeds and the maternal subpopulations of individual lines. To study polymorphism, the data of the breeding records of the ARM “Selax Molochnyi”, the OOO RC “PLINOR” and hemolytic tests.
The usage of Slow Released Fertilizer over bio-organic natural fertilizers on fruit stone rootstock
Authors: Bamatov I M , Bamatov D M , Arsanov M M 
Published: April 2021

Abstract
This scientific research work demonstrates the influences and the effect of applying Slow Released Fertilizer (SRF) based on the biodegradable polymer modification (even distribution of bio-polymer and fertilizer) of Azafoska NPK (16:16:16), bio-organic natural fertilizers such as Baikal EM 1 and NPK Liquid Consortia on stone fruit rootstock nursery (Kuban – 86) as plant nutrition. The results based on the analyzed data (plant and root development) that were received from fertigation system through drip lane irrigation (concentration 0,005%,) and foliar feeding (concentration 0,005%) procedures on stone fruit rootstock plants within studying fertilizers.
Temporospatial Analysis of methane trend in China over the last decade — Estimation of Anthropogenic Methane Emission and Contributions from Different Anthropogenic Sources
Authors: Chen Zhi-yuan 
Published: April 2021

AbstractChina’s atmospheric methane burden has been on the rise in the past decades. However, the relationship between trends and major anthropogenic sources of methane emissions in China has not been well understood. The temporal and spatial distribution of methane concentration in China is investigated using ten years of methane column data (2010-2019) from the Greenhouse Gases Observing Satellite (GOSAT). High-value regions of methane enhancement are found in the northern provinces of China (northeast Xinjiang, northwest Gansu, inner Mongolia, and the border region of Heilongjiang and Jilin). Based on 2010-2018 China Official Statistical Yearbook data and the latest research about methane emission factors, the major anthropogenic methane emissions in China through 2010-2017 are estimated. With Principal Component Analysis (PCA) method on data of estimated anthropogenic emissions and deseasonalized year-averaged methane concentrations in China, it is found that the top three anthropogenic sources with the greatest impact on methane emissions are coal mining, sanitary landfill, and domestic animal rumination. They could have a potential connection with methane enhancement trend high value regions.
Evaluation of rural ecotourism resources based on the AHP Method in Shanghai
Authors: Xiaoli Chen 
Published: April 2021

Abstract
In order to develop rural eco-tourism better, it is very important to establish a suitable evaluation index system of tourism resources. This study constructs an evaluation indicator system of rural ecotourism resources in Shanghai from three aspects: Resource values, ecological environment and development conditions, which includes 18 indexes. Using AHP to determine the weight, in the comprehensive level of evaluation, Resource values (B1)> Ecological environment(B2) > Development conditions(B3). Among the most important indicators are: Recreational value (C1), Pollution control capability (C8), Farming experience value (C7), Environmental hygiene (C9), Convenience of transportation (C14), Ecological value (C4) and Life experience value (C6). By using this evaluation model to grade the rural ecotourism resources in Shanghai through questionnaire survey, the result is that the rural ecotourism resources in Shanghai are quite good. With the development of the construction of the Beautiful Country, the value of rural eco-tourism resources in Shanghai has been continuously explored and the eco-environmental quality is assessed higher, which provides an important guarantee for the development of rural eco-tourism in Shanghai. In addition, cultural values and health value need to be tapped in depth, and efforts should be made to increase the publicity and communication among local residents in rural tourist destinations. While optimizing the construction of tourism facilities, we must constantly improve the level of service management, so as to improve the service quality of rural ecotourism.
Simulation of Passive Earth Pressure against Retaining Wall Considering Wall Movement Mode
Authors: Kejia Wu , Yu Pengqiang , Liu Yang 
Published: April 2021

Abstract
This paper investigated the effect of wall movements on passive pressure in sands by developing numerical simulation based on finite difference method for plane strain condition. A series of simulations was conducted under different wall movement modes (i.e. translation, rotation about a point below the wall, RB, and rotation about a point above the wall, RT). It is concluded that the distribution of passive earth pressure, magnitude and points of application are much affected by the wall movement modes. In addition, the effect of soil-wall friction angle on passive pressure is investigated. Simulation results indicate: the mode of wall movement has great influence on the passive earth pressure, and the heights of the application point in these three modes sort as: RB > T > RT.
The Key Technology of Multi-span Steel Plate Bridge Incremental Launching Construction
Authors: Zhao Jie , Kang Lingjie , Zhang Hangyuan 
Published: April 2021

Abstract
Incremental launching erection is a widely construction technology, which has the advantages of low cost, low environmental requirements, simple equipment. In this project, the multi-point support rolling device is used instead of the linear or planar slide support system, and the short nose bridge-fishing method is further used to realize the smooth pier of the beam body. According to the site, a simple and easy deviation correction device is designed. According to the simulation results of deflection calculation and field deflection measurement data, the construction monitoring of the process of incremental launching was carried out, and the incremental launching construction was successfully completed.
Vegetarian Diet: Why Is It Beneficial?
Authors: Sun Wanlin 
Published: April 2021

Abstract
A vegetarian diet is a type of diet that excludes meats, or seafoods, or sometimes even eggs and dairy. People choose to have a plant-based diet like that are called vegetarians, and some of them do so for the purpose of preventing and treating disease. Because of the higher intake of vegetables, grains, fruit, nuts and fiber from a vegetarian diet and lower intake of saturated fat and cholesterol, a vegetarian diet has health benefits in lowering the risks of getting chronic disease like obesity, cardiovascular disease, and maybe even cancer. However, some people believe that eating a plant-based diet might cause an increased risk of deficiency of certain nutrients. The evidence available suggests that through carefully planning their diets and eating fortified food or supplement regularly, vegeterians can certainly be able to meet their nutrition needs. In order to give people who are considering to become a vegetarian some information about the health benefits and suggestions of having a plant-based diet, in this article, we carefully describe and analyze the relationships between vegetarian diets and BMI, obesity, and cardiovascular disease, and then the relationship between vegetarian diets and mortality from the commonest causes of death and cancer.
TBM cutter wear prediction in inclined shaft project based on tunnelling parameters
Authors: Cheng Jinguo , Jiang Hua , Jiang Yusheng , Zheng Yaofu 
Published: April 2021

Abstract
Cutter wear is one of the important factors affecting the safety and efficiency of shield or TBM tunnelling. Based on the inclined shaft tunnelling project with long distance, large slope and constant excavation in Bulianta coal mine, regression analysis is applied to investigate the relationship between cutter wear and tunnelling parameters such as cutterhead rotation velocity, cutterhead torque, advance velocity, total thrust and penetration, and thus the prediction model of cutter wear is established. The results indicate that cutter wear is significantly correlated with each tunnelling parameter, and that the regression model expressed by cutterhead torque, total thrust and penetration can account for 97.8 percent of the cutter wear issue induced by potential influencing factors. The model has good effect on the prediction and could provide certain guidance and reference for the cutter wear problem in similar geological condition.
Experimental study on stress-strain-strength behavior of cemented tailings backfill with different curing age
Authors: Wang Yongyan , Cui Lizhuang 
Published: April 2021

Abstract
In order to understand the changes in the properties of the cemented tailings backfill (CTB) during the curing process. In this paper, the CTB samples with a cement-sand ratio of 1:6 were prepared and cured for 3, 5, 7, 14, 21, 28, 60, 140 and 200 days respectively, and then a series of uniaxial compression tests were carried out. Then the stress-strain relationship, compressive properties, elastic modulus, etc. of the CTB with different curing age were analyzed. Results indicate that when the samples are cured at a short curing age that is shorter than 7 days, CTB mainly shows plasticity, while as the age increases, the samples’ deformation mainly experienced four stages. And as the age increases, the unconfined compressive strength (UCS) and the modulus of elasticity keep increasing, but the growth rate gradually slows down.
Advances in Research on Production of 1, 3-PD by immobilized technology
Authors: Gao Yifeng , Wang Yanxia , Ma Chunling , Paul Chris 
Published: April 2021

Abstract
1,3-propanediol (abbreviated as 1,3-PD) is an important chemical raw material, which is widely used in printing and dyeing, coatings, inks, pharmaceuticals, antifreeze, lubricants, etc. Used as a monomer to synthesize new polyester material PTT (polytrimethylene terephthalate) has attracted wide attention The first paragraph after a heading is not indented (Bodytext style). The production methods of 1,3-PD mainly include chemical synthesis and microbial fermentation. Due to the shortage of petrochemical resources, the production of 1,3-PD by microbial fermentation has become a hotspot at home and abroad. Among them, the application of immobilization technology and the selection of immobilized carrier materials have a good improvement in the efficiency of 1,3-PD produced by fermentation.
Study on Anti-Tumor Network Mechanism of Miao National Herbs Periploca Forrestii
Authors: Qin Ping , Fang Rongze , Huang Xulong , Zhang Mei , Ding Qin , Wang Xiangpei , Wu Hongmei 
Published: April 2021

Abstract
In this study, tumor disease targets and periploca forrestii(PF) associated targets were determined through the use of databases for the identification of putative therapeutic targets and then combined. After the interaction network of therapeutic targets against tumor was established, and the core targets against tumor were determined by degree analysis. For all putative therapeutic targets, analyses of biological function were performed to optimize the biological processes and key signaling pathways of PF in tumor treatment. The top 5 therapeutic targets were identified, including AKT1, TP53, PTGS2, AR and AHR. The biological processes associated with the antitumor activity of PF were mainly associated with positive regulation of cell proliferation, trypsis response, transcription of DNA templates andpositive regulation of transcription from RNA polymerase II promote regulation; and signaling pathways associated with the antitumor activity of PF are mainly associated with influenza A signaling pathway, PI3K-Akt signaling pathway, and HTLV-I infection signaling pathway.
Application and Evaluation of Removing Nutrients in Wastewater via AAO Process in Tianjin, China
Authors: Sun Weidai 
Published: April 2021

Abstract
Anaerobic/Anoxic/Oxic (AAO) process is one of the effective measures to remove nutrients from the influents for most wastewater treatment plants in China, and thus, assessing the efficiency of AAO process is of great significance. This study used wastewater samples from Tianjin province in China to make evaluations of this technology. Componential analysis shows that total nitrogen (TN), ammonia nitrogen (NH3-N), and total phosphorous (TP) are crucial in determining the concentrations of nitrogen and phosphorous in Tianjin wastewater. The wastewater in Tianjin is mainly derived from domestic wastewater, and followed by industrial one. Decontamination efficiency analyses show that AAO process can remove 79% of TN and 96% TP in the wastewater, which are high because it is manipulated to its maximum extent by the plant. Moreover, the concentrations of TN and TP in the effluents are 8mg/L and 0.12mg/L, conforming to the national standards in China. AAO process can also degrade BOD (Biochemical Oxygen Demand) from the wastewater, which is also a major pollutant in wastewater. The determining factor of the extensive application of AAO process in Tianjin is that it requires less money compared to its counterparts. Therefore, if similar wastewater sources are happening in other cities in China, AAO technology could be widely used there since it is effective both environmentally and economically.
Analysis of Shale Oil Productivity Difference in an 83 and Xi 233 Well Blocks in Ordos Basin
Authors: Zhao Zhenfeng , Xiao Yang , Du Xianfei , Ma Bing , Guo Chao , Ju Yingjun , Wang Jiahao , Chen Mingxin 
Published: April 2021

Abstract
The An 83 well block and the Xi 233 well block are both shale oil blocks in the Changqing Oilfield. The main producing layer is the Chang 7 reservoir, with strong heterogeneity and no obvious oil-water interface. Both are typical low porosity, Low permeability-extra low permeability reservoirs. The An 83 block and the Xi 233 block adopt the same volume modification method for production, but the output data of the two are quite different. The output of the Xi 233 block is significantly better than the An 83 block, and the water content is also lower. Finding out the reasons for the production differences and proposing a targeted shale oil reservoir volume modification model is the key to increasing the production of Block An 83. On the basis of the analysis of production influencing factors, it combines geological factors such as gamma, interval transit time, porosity, saturation, etc., geomechanical factors such as Young’s modulus, Poisson’s ratio, horizontal stress, and Engineering factors such as displacement, liquid volume, sand ratio, etc. Using Pearson and Spearman correlation analysis methods to clarify the main controlling factors of output and capacity, on this basis, complete the research on the output difference of the two blocks. The final results show that the physical properties of the two blocks are the same, the water content is quite different, and the geomechanical basis is different. It is necessary to formulate targeted reservoir transformation and production methods based on the pore throat structure, relative permeability and geomechanical distribution characteristics of Block An 83.
Analysis of influencing factors of stimulated reservoir volume (SRV) and zipper fracturing simulation in shale oil reservoirs of Hu326 Well area
Authors: Zhang Kuangsheng , Xiao Yang , Liu Hanbin , Tang Meirong , Zhang Yanjun , Wang Jianhui , Zhang Liying , Chen Mingxin 
Published: April 2021

Abstract
Horizontal Well SRV of intensive stage and high–intensity for shale oil reservoirs of Hu326, which are different beddings and develop natural fractures locally, is conducive to the formation of complex fracture network with the intersection of main fractures, natural fractures, bedding fractures and other secondary fractures. At present, although there are systematic theories and methods for the study on the extension of hydraulic fracture after intersecting natural fractures and bedding planes, there is no quantitative research on specific parameters, and the research results are not applicable to actual exploitation. Based on the characteristics of shale oil reservoirs and combined with the theory of formation strength with weak surface, this article discusses the formation mechanism of fracture network of jimusar shale oil reservoir and improves the extension law of hydraulic fractures after intersecting with natural fractures and bedding planes. And taking the jimusar shale oil reservoir as the object, the extension law of hydraulic fracture is analysed and the geomechanical influencing factors and engineering control parameters of SRV are determined. The research results provide theoretical basis and parameter guidance for SRV of jimusar shale oil reservoir.