bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on crustal activity in Tengchong volcano area
Authors: Yang Yunfei , Li Jinping 
Published: February 2021

Abstract
By constructing GNSS deformation rate, strain and stress mathematical relationship model; On this basis, the strain and stress data of the Tengchong volcanic area and surrounding areas were calculated through the deformation rate data; Based on the comprehensive analysis of the above data, it was found that: The underground magma sac in Tengchong volcanic area might be in the expansion period; From a macro point of view, the dynamic basis of the crustal deformation in the Tengchong volcanic area was mainly due to the fact that the material on the Qinghai-Tibet Plateau was squeezed by the South China Plate during the eastward flow of materials; And turning to the Yunnan-Burma active masses in the southwest direction, the crust of the Tengchong volcanic area showed a north-south extension and east-west compression.
Numerical Investigation on the Barrier Dam Risk Caused by Landslide-A Case Study on Caijiaba Landslide
Authors: Nianchang ZENG , Bolong LIU , Junning XIE 
Published: February 2021

Abstract
To research the risk of barrier dam induced by landslide, Caijiaba landslide was studied as an example in the present study. The burst risk was assessed as well. To begin with, the region scope of quasi-landslide was obtained by stability calculation. Then the landslide process is analyzed by Partical Flow Code (PFC3D). On the basis of the numerical simulation results, the forming mechanism and motion characteristics of the barrier dam were analyzed. Subsequently, the Classical assessment model was employed to evaluate the burst risk of the barrier dam. Numerical results show that the highest body reaches 68.1 m. As a result, the riverway will be blocked by the debris, forming a weir dam. In addition, the body shape along upstream resembles a wedge. The fastest part of the sliding body is 8 m/s, and some of the debris flow stay on the hill still.
Exploration on the selection of Engineering Project coordinate system based on "Integration of multiple regulations"
Authors: Yong LEI , Lihui WANG , Zhu CHEN , Chuanjian REN , Zhihong WANG 
Published: February 2021

Abstract
In order to avoid the problem that the side length projection deformation value is too large in the process of "multi-gauge in one" coordinate system selection, different coordinate system methods are adopted for planning drawings and engineering construction respectively. In the process of planning, CGCS2000, is comprehensively adopted in the project construction, and the independent coordinate system of the central city of Bijie City is comprehensively adopted. By means of surveying and mapping technology, the connection between the two coordinate systems is established to meet the different needs of the natural resources system and the engineering construction department on a small scale. Under the premise of ensuring the quality and safety of the project construction, it meets the requirements of the Ministry of Natural Resources, and lays a solid surveying and mapping foundation for "multi-regulation integration".
Temporal and Spatial Evolution Characteristics Analysis of Beijing Land Subsidence Based on InSAR
Authors: Muhetaer Nijiati , Yu Jie , Wang Yanbing , Yue Jiabao 
Published: February 2021

Abstract
Land subsidence is one of the main geological disasters in the Beijing Plain. Accurate and quantitative monitoring of the evolution of land subsidence will help scientifically guide the prevention and control of land subsidence. We use PS-InSAR technology and TerraSAR 3m resolution images as our data source to study the temporal and spatial evolution characteristics of Beijing’s land subsidence from 2012 to 2015. The research indicates that, from a spatial perspective, the land subsidence presents a funnel shape, the central area of the settlement funnel is maintained at 112.5km², and the total land subsidence area remains basically unchanged. From the temporal point of view, the central area of the ground subsidence funnel subsides at a rate of 110mm/y, the ground subsidence rate in other areas decreases as it far away from the settlement center.
General Relativity Testing in Exoplanetary Systems
Authors: Gou Xirui , Pan Xinyue , Wang Le 
Published: February 2021

Abstract
In this work discuss the possibility of testing GR with a high degree of accuracy by observing the precession of perihelia in extrasolar planetary systems. Two approaches of measuring perihelion precession of exoplanets are considered- the radial velocity (RV) method and the transit method. In RV, the orbital parameters can be determined by fitting the observed RV curve, which is the reflex motion induced by the orbiting planet. In transit, the time separation of primary and secondary transits is observed to examine the precession. However, the secondary transits are generally week and difficult to be observed, with amplitudes usually less than 1ppm. Therefore, RV method is more feasible in this study. Focusing on the RV method, we creatively derive an analytic formula dAr = Ke sinf(ω) dω for evaluating the sensitivity of precession. To demonstrate the detectability, we simulate RV curves for the selected exoplanets and fit the synthetic data. We found that GR effect can be detected in ten years in some promising systems, with an assumption of the host stars being inactive (without any intrinsic noise) and the precision of RV instruments achieving 0.1m/s. Although successful testing of GR in exoplanetary systems depends on ideal situations as stated above, we will be able to verify the GR precession in near future, considering the rapidly increasing population of discovered exoplanets and the improvement in precision of detecting instruments.
Research on Airport Foundation Settlement Deformation Monitoring Based on Gene Expression Programming
Authors: Guanming Guo 
Published: February 2021

Abstract
As the carrier of the aviation industry, the airport is developing rapidly with the rapid development of the national economy and the overall progress of the society. With the aviation industry as the first industry in Jiangxi’s strategic emerging industries, Jiangxi is giving full play to the foundation and advantages of the aviation industry to make the aviation industry better, stronger and bigger. Currently, Jiangxi is vigorously constructing the third-phase expansion project of Nanchang Changbei International Airport, Ruijin Airport, Yingtan Airport, Fuzhou Airport, etc. During the construction of these airports, the geological conditions are relatively complex, and a large number of excavation and filling works are required, and the height of the excavation and filling body is relatively high. As a result, it is difficult to control the settlement and differential settlement of the foundation after construction, which brings great difficulty to the construction of the project. The foundation engineering under the complex environmental conditions of the airport is a complex system engineering, and its foundation settlement and stability are affected by many factors. This article will take the third-phase expansion project of Nanchang Changbei International Airport as an example, using gene expression programming technology to predict the settlement and deformation of the airport foundation, and relying on training data to obtain high-precision prediction models with high intelligence and rapidity.
Antagonistic properties and biocompatibility as important principles for development of effective and biosafety probiotic drugs
Authors: Mukhammadiev Rish S , Mukhammadieva A S , Skvortsov E V , Mukhammadiev Rin S , Glinushkin A P , Valiullin L R 
Published: February 2021

AbstractAntagonistic properties and peculiarities of inter-strain interactions of probiotic microorganisms were investigated. The study of the antagonistic activity of probiotic strains was carried out by the methods of perpendicular strokes (or delayed antagonism) and the diffusion method (block modification) in relation to opportunistic and pathogenic microorganisms. Most probiotic strains had moderate to high antagonistic activity against both gram-positive and gram-negative pathogens. The results obtained allowed us to select the most active strains, namelyL. plantarum AS-41, L. acidophilus A-14, B. subtilis S-2andB. subtilis S-18, which have a high probiotic potential. To assess biocompatibility, the method of co-cultivation of the selected strains on a modified agar MRS medium was used. The strains that showed biocompatibility of the type “mutual neutrality” or “contact progression” were selected to create a consortium of probiotic microorganisms. Further study of the investigated strains of probiotic bacteria opens up the possibilities of their use for the manufacture of a combined preparation for veterinary purposes, for the prevention and treatment of diseases of the gastrointestinal tract of farm animals.
Status and prospects of breeding of cultivated species of Lupin in Russia
Authors: Yakovenko G L , Lukashevisn M I , Ageeva P A , Novik N V , Zakharova M V 
Published: February 2021

Abstract
The article describes the types of white lupine (Lupinus albus L.), narrow-leaved lupine (Lupinus angustifolius L.) and yellow lupine (Lupinus luteus L.) cultivated in Russia. Easn of them has its own biological snaracteristics, differs in the length of the growing season, grain quality, yield, adapted to certain soil and climatic conditions and does not exclude one another. Among the cultivated species, white lupine has the highest yield potential (6-7 t / ha), the grain quality is close to soy and exceeds it in productivity and protein collection per unit area. Selection of these species is carried out in the all-Russian researsn Institute of Lupin. The directions of selection and the gene pool for their implementation are shown. The article describes some varieties included in the State register of breeding asnievements of the Russian Federation. The world collection of VIR, as well as its own hybrid and mutant material, is widely used as the source material for the selected traits. The introduction of new varieties of white, yellow and narrow-leaved lupine into the Russian feed production systems will increase the production of sneap, environmentally friendly feed protein, reduce the import of expensive genetically modified soy protein components, and increase the efficiency of domestic livestock production.
Biological and ecological agrolandscapes patterns of the South Eastern Siberia
Authors: Trofimov I A , Kosolapov V M , Trofimova L S , Yakovleva E P 
Published: February 2021

Abstract
The article presents the results of agro-landscape and ecological zoning of the East Siberian natural and economic region. Zoning was performed at the Federal Williams Research Center of Forage Production & Agroecology on the basis of the methodology developed by the authors. The East Siberian natural and economic region includes the republics of Buryatia, Tyva, Khakassia, Zabaykalsky and Krasnoyarsk territories, and Irkutsk region. The total area of the territory of Eastern Siberia is 415504.2 thousand hectares. Agricultural land occupies about 6% of the area of the East Siberian natural and economic district, of which 2% is arable land, 4% is hay and pasture. On the territory of Eastern Siberia, which occupies about a quarter of the territory of Russia, there are 10 lowland zones and subzones (Arctic, Arctic Tundra, Tundra and Forest Tundra, North Taiga, Middle Taiga, South Taiga, Larch Forest, Forest-Steppe, Steppe and Dry-Steppe) and Mountain territories. There are 22 lowland and 12 mountain provinces, 49 lowland and 42 mountain districts within the zones. Agro-landscapes of Eastern Siberia are formed mainly in the South of the region in Forest-Steppe and Leaf-Forest, Steppe and Dry-Steppe zones, which are developed in agriculture. There are the main areas of agriculture.
Danger of phytoplasma diseases for fodder crop cultivation
Authors: Bogoutdinov D , Girsova N , Kastalyeva T 
Published: February 2021

Abstract
In a number of Russian regions phytoplasma diseases can be of great importance in the cultivation of forage crops. Nevertheless, phytoplasma diseases are still often considered as a result of the action of abiotic or other factors. The aim of the research was to monitor the distribution of different groups of phytoplasmas on cultivated and wild-growing species of promising forage plants in different regions of Russia. The material for the research was freshly cut or dried parts of cultivated and wild plants with symptoms of phytoplasma infection, collected in different regions of Russia. To detect and identify phytoplasmas, PCR and RFLP analysis were used. Seven genetic groups of phytoplasmas: 16Srl, 16SrII, 16SrIII, 16SrVI, 16SrXII, 16SrXIV and 16SrX were identified in 47 species of plants from 18 families, including 24 (51%) species of cultivated and 23 wild plant species collected in 17 administrative units of the Russian Federation. The greatest harm phytoplasma diseases cause on wheat and barley cultivated for grain fodder, Russian bromegrass, alfalfa, clover and other legumes, sugar and fodder beets, potatoes, as well as fruits used for animal feed. The harmfulness of phytoplasma diseases increases in areas to the south of the Middle Volga region and in dry years. This should be taken into account when developing regional recommendations for the cultivation of forage crops.
Using Si-rich materials for increasing fodder grass quality and quantity
Authors: Wei X , Zhang P , Matichenkov V V , Bocharnikova E A , Demin D V , Sevostianov S M 
Published: February 2021

Abstract
Improvement of forage quality is one of the essential issues to enhance livestock productivity. Bahiagrass is a popular fodder plant used as pasture species and for hay production, but it lacks the nutritional quality. In greenhouse experiment, the effect of silicon (Si) (calcium silicate and amorphous silicon dioxide) and nitrogen (ammonium nitrate) supplementation on bahiagrass growth and protein content was evaluated. Both types of fertilizers significantly increased the biomass and crude protein content in leaves of bahiagrass. Higher effect was obtained when Si was applied together with nitrogen. The increases were 78 to 100% for biomass and 57 to 59% for crude protein content. Considering that improved plant Si nutrition mitigates the negative effects of biotic and abiotic stresses, the Si involvement into fertilizer management strategy in fodder crops could be efficient for maintaining productivity and quality.
Deformation modulus tested by the falling ball test method and the experimental verification
Authors: Xue Yingqi , Han Xiaokun , He Huayang , Luo Zhu 
Published: February 2021

Abstract
In filling engineering, the mechanical properties of geomaterials are the most important mechanical indicators. With the improvement of the measurement technology, the falling ball test (FBT) method has been gradually popularized and applied to the testing of geomaterials mechanical properties. In order to verify the testing accuracy of the FBT method, experimental results of the deformation modulus tested for the homogeneous fine-grained materials and the layered structures using the FBT method are compared with the K
30 plate load test, which is the earliest and the most widely used in-situ test method. And some conclusions are drawn in this present paper.
Influence of diameter thickness ratio of main tube on bearing capacity of steel tube tower joints
Authors: Zhang Liang , Hou Shifeng , Chen Chen , Tang Yake , Niu Kai , Pei Haowei , Ju Yanzhong , Lin Tiantian 
Published: February 2021

Abstract
In order to study the influence of steel tube diameter thickness ratio on the bearing capacity of steel tube angle steel tower joint, the finite element model of tube plate joint was established, and the failure mode and bearing capacity of the joint under different steel tube diameter thickness ratios were studied, and the influence law of steel tube diameter thickness ratio on the bearing capacity of steel tube tower joint was obtained, and the relationship between steel tube diameter thickness ratio and steel tube tower joint bearing capacity was established through regression analysis in this paper. The results show that angel steel tube plate K-type joint has two kinds of failure mode, and in a certain range, the bearing capacity of the joints increases with the increase of the steel tube diameter thickness ratio, and decreases after reaching the maximum bearing capacity.
Analysis of surrounding rock anchoring effect under the condition of squeezed mountain
Authors: Ma Yujun , Su Chao , Zhang Heng 
Published: February 2021

Abstract
In the process of orogenesis, the geological conditions of vertical strata were formed due to the intense compressive tectonic movement, and lithologic stratification occurred in the rock mass of the plant along the horizontal plane and vertically upstream and downstream. The main powerhouse of a power station straddles two types of rock formations along the axis. Considering the lithological differences between the two ends, traditional support methods will inevitably fail to meet the requirements of safety and economy. In this paper, under the condition of systematic bolt support for the whole plant, prestressed anchor cables are added to the upstream and downstream side walls of the plant in the type III surrounding rock area to increase the stability, and the anchoring effect is analyzed and compared with the calculation of the burrow. The results show that the deformation around the cave in the surrounding rock areas of type II and III under unsupported conditions differs by 31.48%, and the depth of the plastic zone in the surrounding rock area of type III exceeds the anchoring depth of the bolt; After partition support, The horizontal displacements of typical cross-sections in the two types of surrounding rock areas have decreased by 8.66% and 17.11% respectively, the stress distribution is more uniform, the distribution range of the plastic zone in the downstream wall of the plant is significantly reduced, and the stability of the surrounding rock is guaranteed.
Prediction of the Probability of Earthquake in Seismic Risk Analysis Using Bayesian Method
Authors: Shang Shiyao 
Published: February 2021

Abstract
Because of the randomness and uncertainties of earthquake and its structures, it is a natural choice to analyze and evaluate the risk of earthquake in the way of seismic risk analysis. Effective prediction of earthquakes can minimize property losses and protect citizens’ safety. In this article, Bayes rule was used to make a simple prediction of the risk of a strong earthquake in a certain area. Then we conducted probabilistic seismic risk analysis (PSHA) to tackle the problem of a specific earthquake about where the earthquake will occur, how big the earthquake will be and when will the earthquake occur. Furthermore, we dived into spatial uncertainty, temporal uncertainty, and size uncertainty, respectively. Since earthquake intensity is significant for seismic vulnerability analysis, PGA (peak ground acceleration) was used as the index of earthquake intensity in this article. To be more specific, Wenchuan city in Sichuan province in China was chosen as the subject. Finally, seismic risk analysis was performed and the failure probability of the system was gained.
Designing phthalonitrile/hydroxyl compound systems for high performance CFRP composites
Authors: Yang Xulin , Li Kui , Liu Qiancheng , Lei Wenwu , Liu Hai , Feng Wei , Wang Pan , Liu Xiaobo 
Published: February 2021

Abstract
High mechanical residues at/after elevated temperatures are basic prerequisites for the engineering applications of carbon fiber reinforced polymer (CFRP) composites in special fields like aerospace. In this study, phthalonitrile (PNP) copolymers based on hydroxyl compounds of BP monomer, PEP and BZCN resin were designed and their curing behavior and processability were investigated for realizing the corresponding CFRP composites. High temperature mechanical performances of PNP/hydroxyl compound/CF composites under instantaneous and non-instantaneous states are systematically assessed. At 300 °C, PNP/hydroxyl compounds/CF composite showed a retention rate of tensile, compressive, flexural strength and flexural modulus higher than 35%, 95%, 80% and 90%, respectively. After 300 °C/50 h thermal aging, their flexural properties show no obvious attenuation. Even after being aged at 350 °C for 50 h, the residue of flexural modulus is above 90% while that of flexural strength is over 60%. The mass residue of PNP/hydroxyl compounds/CF composites were all higher than 98% and 90% after aging at 300 °C and 350 °C for 50 h. PNP/hydroxyl compounds/CF composites, with the excellent comprehensive mechanical properties, can be used as high performance engineering materials.
Full printed flexible pressure sensor based on microcapsule controllable structure and composite dielectrics
Authors: Mo Lixin , Meng Xiangyou , Zhao Jing , Pan Yaqin , Sun Zhicheng , Guo Zhenxin , Wang Wei , Peng Zhengchun , Shang Chao , Han Shaobo , Hu Kun , Cao Meijuan , Chen Yinjie , Xin Zhiqing , Lu Jiasheng , Li Luhai 
Published: February 2021

Abstract
Flexible pressure sensors have attracted a great deal of attention due to their significant potential for applications in electronic skins, artificial intelligence and wearable health care devices. It is still challenging to obtain the flexible pressure sensor with high sensitivity and large linear measuring range in a low cost and facile way. In this paper, the composite dielectrics ink based on thermal expansion microcapsules (TEMs), silver nanowires (Ag NWs) and polydimethylsiloxane was employed to improve the performance of the flexible capacitive pressure sensor. The screen printing method was used to prepare the electrodes and microstructural composite dielectric layer. The results indicated that the flexible sensor with composite dielectrics of 1 wt.% TEMs and 0.5 wt.% Ag NWs demonstrated the excellent performance including the maximum sensitivity of 2.1 kPa−1 and wide linear pressure range. The dramatic improvement in the sensor’s sensitivity and linear pressure range could be attributed to the synergetic effects of the TEMs controllable microstructure and relative permittivity increase of composite dielectrics under pressure. In addition, the full printed flexible pressure sensor showed its limit of detection of 1.3 Pa, responding time of 50 ms, proximity sensing distance of 24 cm and good mechanical durability over 3600 cyclic compress–release testing. To our best knowledge, these characteristics are superior to the printed capacitive flexible sensor in reporting. In this paper, the full printed flexible pressure sensor demonstrates it is a good candidate to be applied in the field of E-skin, pressure mapping and wearable health care devices, etc.