bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Temporal and Spatial Variation Process of Dianchi Lake Surface Water Temperature Based on MODIS Remote Sensing Images
Authors: Wang Yunhui , Luo Yi , Tan Wenjing , Su Hong
Published: February 2021

Lake surface water temperature (LSWT) is an important physical attribute that affects the ecological environment of lakes. It plays an important role in the ecological process of the water environment and directly affects human production and life, the ecological environment system of the water area, and the diversity of organisms. In order to adjust and improve the ecological conditions of the watershed, it is necessary to obtain a large amount of effective lake surface water temperature data, and use this as a basis to analyze the temporal and spatial change process of the LSWT. This study uses MODIS (MOD11A2) surface temperature product data to obtain the LSWT of Dianchi Lake, and then analyzes the temporal and spatial variation characteristics of the LSWT of Dianchi Lake on different time scales (year, season, month) during the day and night. The research results show that the annual, seasonal and monthly average values of the LSWT during the day and night are all increasing from 2001 to 2017. The average annual temperature rise rate of Dianchi LSWT during the day and night is 0.09°Cyr−1and 0.05°Cyr−1, respectively. The spatial analysis results show that the LSWT increase area of Dianchi Lake is expanding.
Analysis on the Characteristics of Cultivated Land Change in DianChi Lake Basin based on remote sensing image processing technonlogy in the past 20 years
Authors: Gao Min , Luo Yi , Shi Lina , Shang Chunxue
Published: February 2021

Cultivated land is the fundamental guarantee of agricultural production, accurate acquisition of information such as the area and distribution of cultivated land and the change characteristics of cultivated land is of great significance for agricultural resource monitoring and production. The development of remote sensing technology provides a new technical scheme for rapid and efficient extraction of cultivated land information. This article takes Dianchi Lake Basin as the research object to study the characteristics of cultivated land changes in Dianchi Lake Basin in the past 20 years. In the past 20 years, the distribution of cultivated land in the dianchi lake basin gradually changed from species concentration to decentralization, and showed a trend of gradually moving away from dianchi lake. Through the analysis of the dynamic attitude of land use, it is found that the cultivated land area in the dianchi basin has significantly changed between the land use in the past 20 years. From the perspective of the change trend and state index of single land use in the dianchi lake basin, the bidirectional transition of all land use in the region is frequent and extremely unbalanced. The area converted from cultivated land to non-cultivated land is larger than the area converted from non-cultivated land to this type. It develops towards the direction of scale reduction and is in the state of “falling trend”.
The temporal and spatial distribution of Chinese old trees and its analysis
Authors: Zhao Limei , Yang Kun , Luo Yi
Published: February 2021

The oldest old trees in China are distributed in remote and high-altitude areas. Studying the distribution and characteristics of old trees in China is conducive to understanding the impact of human activities on the survival of old trees and plays a great role in the protection of old trees. In this paper, combined with the old tree data set compiled by Jiajia Liu et al., the geographical population boundary of China, etc., the distribution and characteristics of first-class old trees are analyzed and discussed. The results show that: the first-class old trees are generally distributed on the mountains; they are basically distributed on the left side of the population boundary; from the tree species, they are mostly Juniperus przewalskii, Juniperus tibetica, Chamaecyparis obtuse, Cunninghamia lanceolate, Pinus armandii, Tsuga dumosa, Picea likiangensis and Larix sibirica.
The influence of environmental factors on the intensity of typhoon Mirinae in the South China Sea and its forecast analysis
Authors: Huang Ying , Huang Xiaoyan , Zhao Huasheng , Jin Jian
Published: February 2021

The rapidly intensifying typhoon Mirinae (1603) originated in the South China Sea (SCS) has been selected to analyze the high and low level circulations, vertical wind shear (VWS) and ocean conditions in and around the SCS when Mirinae was strengthening. Further, the fuzzy neural network (FNN) ensemble model has been developed for 24-hour intensity prediction based on climatology and persistence factors and dynamic factors of numerical prediction products as potential predictors. The underlying conditions were favorable for Mirinae, however, it did not be intensified to a strong typhoon because of the weak high and low level circulations and strong VWS. For the FNN ensemble prediction model input, predictors were selected by employing both a novel stepwise variable selection algorithm based on the k-nearest mutual information estimation and Laplacian Eigenmaps of manifold learning, and then the main prediction information hidden in high dimensional data set was extracted with low-dimensional structure. Results show that, the predictions of the new model are stable and reliable, and the forecast accuracy is high, providing a new forecasting tool and modeling method for the objective forecast of typhoon intensity.
Flood Monitoring in Weifang City, Shandong Province based on Sentinel-1A SAR
Authors: Wang X G , Jiang A H , Dai J , Wang Z W , Zhang S N , Guo X R
Published: February 2021

Flood disasters pose numerous hazards which seriously endanger human life and property. Therefore, flood monitoring is essential. In August 2018, an unusual precipitation occurred in Weifang City, Shandong Province, China, causing severe flooding. By making full use of polarization information from Sentinel-1A SAR data before and during the disaster in Weifang City, we were able to employ the Doublet, Otsu and Region Growing methods towards VV and VH images to extract the water body information. To improve the accuracy of water body identification we took the intersection processing of VV and VH images before and during disaster respectively. Then we monitored the submerged area by taking overlay analysis of the results of before and during flood. The comparison analysis between these three methods and the InSAR result show that the Doublet method has the largest difference with the InSAR result and has the lowest recall and precision rate. The Otsu and Region Growing methods are equivalent, but the Otsu had a higher recall rate while the Region Growing method had a higher precision. The area of flood inundation in Weifang City based on the Otsu method is about 1892.7km2, while the area of flood inundation according to the Region Growing method is about 1576.6km2.
A revised forecast method of ECMWF precipitation based on CNN feature extraction
Authors: Zhao Huasheng , Huang Xiaoyan , Huang Ying , Jin Jian
Published: February 2021

The paper proposes a method for correcting the precipitation forecast of the European Centre for Medium-Range Weather Forecasts (ECMWF) model. The method first uses the ECMWF physical quantity field to draw the flow field diagram in the form of weather, and uses it as the input of the convolutional neural network(CNN) and performs feature extraction on it. Secondly, select several characteristic factors that are highly correlated with the forecast object from the many characteristic factors. Finally, the selected characteristic factors and the precipitation forecast factors of the ECMWF model are used as the input factors of the random forest regression model for modeling and forecasting. Through the correction forecast test of the next 24h precipitation at 10 forecast test stations, the results show that the ECMWF precipitation correction forecast method proposed in this paper is 15% less than the forecast method using ECMWF interpolation to the station on the MAE and RMSE indicators. And 17%. At the same time, on the TS scores of rainstorms above 24h, the revised forecast method proposed in this paper has a false alarm rate significantly lower than the forecast method of ECMWF interpolation to the station.
Lift and Drag Analysis of a Bionics Flapping Aircraft
Authors: Wang Yifan , Xie Siwen
Published: February 2021

This article focuses on the study of bionic wings. Based on the analysis of insect thoracic cavity structure and movement mechanism, two groups of insect flapping wings models were simulated, and unsteady aerodynamic problems were studied using computational fluid dynamics numerical simulation methods, with emphasis on computer simulation, iterative calculation equations and observation. The convergence is used to analyze the driving force curve, verify and analyze the influence of air fluid on the surface pressure and speed of the wing during the flight of the insect. Studying the influence of fluid mechanics during insect flight is of great significance to further optimize and improve existing aircraft structure forces.
Application and analysis of inverted ruler method in vault settlement monitoring of underground excavation station
Authors: Xu Yiteng , Guo Hao
Published: February 2021

In the urban rail transit engineering, the construction of undercutting under the existing rail line is plagued by high construction risk and high monitoring accuracy requirements. Taking a station A in an urban rail transit project as an example, combined with the characteristics of the project, the monitoring scheme of vault settlement in the excavation section is formulated. In order to establish two sets of relatively independent elevation system and adopt the method of setting up independent station to measure the inverted ruler, the feasibility of this method is verified, and the sources of measurement error and control measures are analyzed. The actual results show that the method can meet the requirements of monitoring accuracy of vault settlement in the underground excavation section of subway station.
Transfer analysis of land-use type gravity center based on Landsat data - A case study of Zhoushan, China
Authors: Chen Huixin , Chen Chao
Published: February 2021

Based on the Landsat images of 7-time phases from 1984 to 2016, this paper analyzes the center of gravity transfer of land types in Zhoushan City, China. The research shows that the center of gravity migration distances of construction land, forest land, water, tidal flats, cultivated land/grassland and bare land are 1.80km, 0.37km, 4.27km, 3.84km, 0.55km and 1.60km respectively. The construction land expands along the coastal plain of each island, leading to the gradual encroachment of cultivated land/grassland and the spatial distribution of cultivated land/grassland tends to be discrete. This study will provide data support for the rational decision-making of land resource management in Zhoushan City and promote the sustainable use of land resources.
Fitting Atmosphere Temperature of 20th Century in 49 European Capitals using Random Walk Model
Authors: Yan Shaomin , Wu Guang
Published: February 2021

The 20th century has been witnessed with the rise of global temperature due to CO2 emission since the industrial revolution. The global warming is observed around the world, and the governments take measures to reduce CO2 emission to combat the rise of temperature. The temperature profile has been mainly modelled at global level. Yet, it necessarily models the temperature in cities because each city would have its own feature. Among various models to fit or simulate the temperature, the application of random walk model is rare. In this study, we used the random walk model to fit the temperature of the 21th century in 49 European capitals not only because the industrial revolution first appeared in Europe but also European governments commit and endorse the Paris Agreement. First, the yearly temperature was simplified as increase (+1) or decrease (–1) in comparison with previous year, whose addition in the 20th century in each of 49 European capitals construct a step-typed curve. Second, random walk model was used to fit these step-typed curves with the least squared method. Third, the widely used CRUTEM3 temperature in the 20th century in each of 49 European capitals was directly fitted using random walk. The results show that random walk can fit the step-typed curves and CRUTEM3 temperature.
On-time response of unexploded ordnance-like targets detection with transient electromagnetic system
Authors: Hao Jun , Zhang Shuang , Chen Shudong
Published: February 2021

Time-domain electromagnetic induction method including on-time and off-time illumination is widely developed in unexploded ordnance (UXO) detection. The secondary field response detected in off-time is almost ineffective for targets with small size and great depth due to fast signal attenuation and low signal-to-noise ratio at late stage. In this paper, the on-time response for UXO detection with TEM system is discussed in detail. Firstly, the on-time response of a sphere is calculated theoretically and compared with the off-time response. Secondly, the transmitting circuit with four NMOS is designed to generate desired transmitting current to measure on-time response effectively. Finally, the on-time and off-time response of several targets are measured simultaneously. Results show that the late signal-to-noise ratio of on-time response is much higher and the attenuation of target with small size and iron pipe is slower than the off-time response, which is consistent with the theoretical results.
Sea surface temperature prediction model based on long and short-term memory neural network
Authors: Li Xiaojing
Published: February 2021

In response to the monitoring and forecasting of El Nino/La Nina phenomenon, This paper proposes a sea surface temperature prediction method based on long and short-term memory neural network for the average sea surface temperature in the NINO comprehensive area. This method uses the monthly anomaly sea surface temperature sequence for the mean sea surface temperature in the NINO Comprehensive area as the input of the long- and short-term memory neural network to establish a forecast model. The average sea surface temperature of the NINO comprehensive area is forecasted for the next 1 to 3 months. The results show that the method can better predict the average sea surface temperature of the NINO comprehensive area, which is useful for the monitoring and forecasting of El Nino/La Nina phenomenon. Provides a new approach.
Study on Extraction of Landslide Information Based on UAV Survey
Authors: Wang Zhiyuan , Huang Taosheng , Bao Xiaojun , Ma Shuai , Sun Cheng , Liu Gao
Published: February 2021

Traditional analysis of landslide evolution discipline requires particular on-site investigation, which not only consumes a lot of manpower and material resources, but is also very inefficient. With the development of small drone aerial photography technology, a method based on the whole area landslide measurement becomes possible. This paper uses the rapid development of digital photogrammetry technology in recent years to monitor the surface deformation of the Qinyu landslide, and conducts an in-depth study of its evolution. The results show that the evolution of the Qinyu landslide is inherited and different in time and space. The reconstruction of the three-dimensional model greatly simplifies the traditional on-site investigation, and it also provides new methods and ideas for landslide monitoring.
Research status and characteristics of advanced hydrocarbon trap evaluation
Authors: Wang Wei , Chen Guomin , Deng Kang , Du Tangzhong , Wang Lin
Published: February 2021

Advanced hydrocarbon trap evaluation is crucial and necessary for the exploration target optimization decision. Its evaluation conclusion is verified by actual drilling results, so its research status has a direct impact on exploration benefits. This paper discusses the essence of advanced hydrocarbon trap evaluation that focuses on the development of quantitative and integration evaluation under the guidance of exploration target decision. Then, from these aspects, such as the theory method system, the basic geological research, the quantitative evaluation, economic evaluation and degree of computer application, their current situation of the development was unraveled one by one, the research status tends to be the higher degree of computer application, the deep involvement of basic geological research, and integration of multi-disciplinary procedure, the higher qualitative evaluation combined with the quantitative evaluation, and also a research chain of predication and decision-making process so that it needed constantly and actively by the support of different multi-disciplines, such as the system engineering theory and evaluation theory, decision-making theory, computer science and other disciplines to improve the evaluation theory and advanced evaluation methods.
Study on a feasible detection method based on acoustic characteristics of sea moon jellyfish
Authors: Wei Dan , Yang Qian
Published: February 2021

In order to solve the problem of water intake clogging by jellyfish in cold source water area of nuclear power plant, a jellyfish detection method based on high-resolution multi beam imaging is proposed. The sea moon jellyfish detection experiment in real environment is carried out in the laboratory pool, and the echo characteristics of individual jellyfish are analyzed. In the experiment, the acoustic images of jellyfish and other sea creatures are obtained by using acoustic means. It is found that the change of posture has an important influence on the echo energy of jellyfish. The feasibility of detecting jellyfish and other marine organisms by high frequency multi beam method is preliminarily verified.
The main principles of formation of a collection of strains of the causative agents of septoriosis of cereal crops
Authors: Pakholkova E V , Kolomiets T M , Salnikova N N , Kurkova N A
Published: February 2021

A collection of strains of the causative agents of septoriosis of cereal crops was established at the All-Russian Scientific Research Institute of Phytopathology (ARRIP) as a result of long-term monitoring of the species and intraspecies structure of pathogen populations in Russia and the CIS countries. It is the basis for immunological, phytopathological and genetic researches both within the Institute and in other institutions working in the field of plant breeding and plant protection. The article describes the main principles of formation of collection, the main criteria of selection of strains, and their significance and evaluation methods. The structure of the collection fund formed on the basis of these principles is presented.
The use of Superstim modifications in low and ultra-low doses for long term deposition of micro-plants of perpetual raspberry in the culture room conditions
Authors: Akimova S V , Kirkach V V , Demenko V I , Malevannaya N N
Published: February 2021

A method for long-term deposition of micro-plants in the culture room conditions when adding Superstim-1 and Superstim-2 products in low doses to the nutrient medium has been developed for clonal micro-propagation of perpetual raspberry (Diamond, Gerakl varieties). This method does not require any special equipment and ensures viability sustaining of micro-plants without signs of necrosis and chlorosis for 10-12 months without additional transfers to a fresh nutrient medium. When depositing regenerants of the Brilliantovaya variety for 12 months in the culture room conditions, the advantage of adding Superstim-1 in concentration of 1×10-9 %, 1×10-15 %, 1×10-18 % to the nutrient medium composition was revealed. When depositing the Gerakl variety, it was found that storing of micro-plants of the Gerakl variety for more than 10 months is impractical, since at the 12-th month of sub-culturing the viability of micro-plants did not exceed 30% even in the best variants of the experiment. At the 10th month of sub-culturing, the advantage of adding the Superstim-1 product 1 1×10-6 %, 1×10-9%, 1×10-15 %, 1×10-18 % to the nutrient medium composition of the Superstim-1 product was revealed.
Fungi of the genus Curvularia sp. - new pathogens of turfgrass in Russia
Authors: Katushova Marina , Beloshapkina Olga , Tarakanov Rashit , Shipulin rey , Dzhalilov Fevzi
Published: February 2021

The research was carried out in 2019-2020 within the framework of a long-term study of the quality and phytosanitary state of sports turf in the southern region (Fisht Stadium in Sochi, Krasnodar Territory), at the Department of Plant Protection and Laboratory of Plant Protection of the Russian State Agrarian University - Moscow Timiryazev Agricultural Academy (Moscow). For the first time in Russia was found on the territory of Sochi (Fisht Stadium) the fungus Curvularia sp., which was identified by cultural and morphological characteristics using microbiological and microscopic methods. Specification of the species of the fungus was carried out according to the results of the molecular genetic method. The results of sequencing and subsequent comparison of the obtained nucleotide sequences with the NCBI and MycoBank databases made it possible to establish that a phytopathogenic fungus of the genus Curvularia, presumably C. geniculata, caused the damage of turfgrasses in Sochi.
The first record of genus Neocystis from Kamchatka volcano soils, confirmed by genetic data
Authors: Gaysina L A , Allaguvatova R Z , Eliáš M
Published: February 2021

Two strains of green algae having kidney-like cells in mucilage envelope without pyrenoids were isolated during the floristic study on algae in volcanic soil samples collected in the vicinity of Mutnovsky volcano (Kamchatka peninsula, Russia). Based on morphology, the strains were assigned to the genus Neocystis. 18S rRNA gene sequence comparisons confirmed, that the new isolates are members of the Neocystis clade. Thus, the genus Neocystis was reported from Kamchatka for the first time. The newly isolated Neocystis strains have good potential for use in biotechnology as sours of extracellular polymeric substances.
Comparative productivity and productive longevity of perennial grasses in Moscow region
Authors: Glinushkin A , Kislov A , Kascheev A , Aysuvakova T , Kartabaeva B , Vecherov A
Published: February 2021

The studies were conducted on the experimental field of the All-Russian Research Institute of Phytopathology in 2016-2019 in two field experiments on sod-podzolic heavy loamy soils. The aim of the study was to identify the most promising perennial herbs for the organization of a green line in order to make more rational use of labor and technical resources. As the study showed that meadow alfalfa is superior in the first year, but from 2 years old, yellow-hybrid alfalfa comes out on top; timothy and especially fescue and wheatgrass reduced the yield. 2. On average, over 3 years, the highest yield of dry matter of feed units and metabolic energy in the harvest was provided by yellow hybrid alfalfa - 61 c/ha, 45 c/ha 58 gJ/ha and timothy grass, respectively 6 with an undoubted superiority of alfalfa in the yield of digestible protein - 8 against 2.96 c/ha of timothy grass. The disadvantage of alfalfa is the difficulty of seed production due to the long flowering period and cross-pollination, the seeds are formed in the lower part of the stem, and flowering continues.
Improving the forage production system in the Moscow region at the present stage
Authors: Glinushkin A , Kislov A , Kascheev A , Aysuvakova T , Kartabaeva B , Vecherov A
Published: February 2021

The studies were conducted on the experimental field of the All-Russian Research Institute of Phytopathology in 2016-2018 in two field experiments on sod-podzolic heavy loamy soils. The aim of the research was to select among the widest range of forage crops the most productive ones with high nutritional value and low cost for organizing green and raw materials conveyors in order to make more rational use of labor and technical resources. Among the annual crops and mixtures, the most productive for three years on average were sunflower, Sudan grass, white lupine and oats: the crop of fodder units was respectively: - 49.9; 50.9; 49.9 and 47.9 centners per hectare; mixtures with peas, they are inferior to single-species crops due to pea damage by powdery mildew and pea weevil, and white sunflower with lupine ensured an equal collection of feed units — 49.9 centners per hectare and the highest provision of digestible protein —127 g in 1 fodder unit. Of the perennial grasses yellow-hybrid alfalfa and timothy grass, which it is expedient to grow in mixed sowing to increase the productive longevity of herbs and reduce the cost of feed, proved to be the most promising.
Feed production on low-lying peat and developed soils of the North-East of the European part of Russia
Authors: Ulanov A N , Kovshova V N , Glubokovodskih A L , Smirnova A V , Kosolapova V G , Mokrushina O G , Ulanov N A
Published: February 2021

The results of long-term research on the use of drained lowland peat and developed soils in feed production in the North-East of the European part of Russia are presented. The main agroecological technologies for the production of high-quality feed in soil-protective crop rotations, long-term pastures on drained low-lying peat soils and methods for using developed peatlands in intensive haymaking mode are proposed.
Perennial forage grasses - the basis for greening agricultural production
Authors: Kosolapov V M , Kostenko S I , Tyurin Yu S , Shamsutdinova E Z , Piskovskii Yu M
Published: February 2021

The desire to get the maximum profit from each hectare in the shortest possible time is a common phenomenon in agriculture in many countries. Landowners try to grow the most commercially profitable varieties and crops, which leads to the emergence of monocultures, and as a result to the use of high doses of fertilizers, intensive tillage, and frequent use of pesticides and growth regulators. This land-use regime inevitably leads to a decrease in humus in the soil, to an increase in erosion processes, and to a decrease in agricultural returns. Application according to V. R. ‘s developments Williams, perennial grasses improves the structure of the soil, increases and preserves its fertility. When using feed based on legumes and grasses, as the most natural for most animals, their life expectancy increases, the quality of final products improves in terms of consumer indicators, and in terms of environmental safety. For the successful use of perennial grasses, it is necessary to select the species and varietal composition of these grasses depending on the region and soil and climatic conditions. In many cases, the necessary varieties of the necessary species do not yet exist and they need to be derived based on the use of methods of ecological selection and the creation of an effective system of scientific support aimed at obtaining the final product.
Creation of new varieties of comb-shaped wheat grass (Agropyron pectinatum (Bieb.) Beauv.) as a factor of increasing the efficiency of grass growing in arid conditions
Authors: Saprykin S V , Zolotarev V N , Ivanov I S , Ostrikova M G
Published: February 2021

Perennial grasses play the most important role in solving the problem of production of energy-saturated high-protein bulky feed and biologization of agriculture. Perennial grasses are the most affordable and stable source of cheap plant food and a means of preserving soil fertility with intensive farming, which has an anthropogenic negative impact on agroecosystems. Perennial grasses play a special role as a biological means of countering the degradation of biological, water-physical and agrochemical properties of soils, their dehumidification and erosion processes. In arid climates, the most effective species of perennial bluegrass is the comb-shaped Wheatgrass (Agropyron peintforme Roem et Schult.). Compared to two other species used in agricultural practice – Siberian (sand) granary (Agropyron fragile (Roth) P. Candargy) and desert (narrow-leaved) (Agropyron desertorum (Ksch. ex Link.) Schult), the comb-shaped wheat grass is characterized by a wider range of growth, high productivity and environmental plasticity. In the State register of breeding achievements approved for use in Russia as of 2020, only 10 varieties of comb-shaped wheat grass are registered, which limits the effective use of this crop and makes it necessary to intensify breeding work in order to create new varieties with improved economic and useful characteristics. At the Voronezh experimental station, active breeding work is being carried out on perennial grasses to develop new varieties of comb-shaped wheat grass. Currently set up and ready to transfer to a new variety of Pridonskoy, characterized by drought tolerance, high forage and seed productivity and longevity. Thus, when the washed-out slopes were grazed, the abundant participation of the granary in the grass mixture was noted in the third year. From the fifth year, the granary dominated the herbage, and in the 10th-12th year of use, the cenoses were represented only by the granary.
Agro-energy efficiency of using new zoned varieties to create cultivated pastures in the forest zone of the European part of Russia
Authors: Kutuzova A A , Provornaya E E , Sedova E G , Tsybenko N S
Published: February 2021

The agro-energy efficiency of using new varieties of creeping clover (Lugovik), meadow clover (Veteran) and alfalfa changeable (Agnia) in comparison with previously zoned varieties of these species (respectively – VIC 70, Tetraploid VIC and Pasture 88) is determined on the basis of the results on productivity and total anthropogenic costs obtained in the field experience based on the dry-fall type of pastures occupying 92% in the Central region of the European part of Russia. The assessment of agro-energy efficiency was determined according to the methods approved by the Russian Academy of agricultural Sciences. Taking into account a set of indicators (productivity of improved land for the production of exchange energy in GJ / ha and products produced in MJ per 1 GJ, reducing total anthropogenic costs in GJ/ha and increasing their payback), the high efficiency of new varieties is established and the principle of changing varieties in meadow forage production is scientifically justified. At the same time, the effectiveness of previously zoned varieties of leguminous grasses has also been confirmed, which allows increasing their seed production in the regions due to the high demand not only for field, but also for meadow grass.
Study of the reproductive toxicity of probiotic strains on laboratory animals
Authors: Skvortsov Evgeny , Mukhammadiev Rishat , Mukhammadiev Rinat , Valiullin Lenar , Rud Vasily , Glinushkin rew
Published: February 2021

The objective of this study was to determine the effect of probiotic preparations contained Bacillus subtilis 109 CFU / ml, Propionibacterium 107 CFU / ml, Lactobacillus plantarum 107 CFU / ml on the physiological state, reproductive functions and the mortality rate of white rats and their offspring. The results of the analysis of the reproductive toxicity of the suspension of strains of probiotics and producers of prebiotics showed that long-term oral administration of the studied doses did not lead to a decrease in the reproductive function of laboratory animals during the experimental period, corresponded to the norm and did not differ significantly from the indicators of the control group. Based on the results obtained, the investigated form of the probiotic can be classified as a drug of low toxicity for reproductive function and, in accordance with GOST 12.1.007-76, referred to the IV hazard class.
Estimation of the prospects of using agrobiotechnologies to increase yield and preservation of soils
Authors: Startsev V I , Glinushkin A P , Spiridonov Y Y
Published: February 2021

The article substantiates the possibility of creating agrobiocenoses with strategically important crops for the formation of a nutritional balance in the diet of the population of the Russian Federation without the use of chemically synthesized agrochemicals, in which the variety of the main elements of biologic technologies of cultivation of agricultural plants plays a key role. Progressive analysis of demand from the agro-industrial complex, indicators of the development of the agrobiotechnology market, consumer trends, and venture investments in biologic technologies allow us to conclude that the development and proposed approaches are promising, allowing to obtain high yields of agricultural crops while maintaining and increasing soil fertility, improving the phytosanitary state of fields.
Methods for reducing erosion on degraded pastures of slope lands of the RSO-Alania
Authors: Bekuzarova S A , Kozirev S G , Glinushkin A P , Yu Podkovyrov I
Published: February 2021

A wide variety of vegetation in mountain pastures is a valuable food base for animals. In order to preserve various plant species, quality and quantitative composition are systematically monitored. However, due to erosion processes on mountain slopes, a number of valuable forage plants are disappearing and a number of measures are being carried out to restore disturbed lands aimed at reducing the adverse factors of natural feed sources. On pastures of sloping lands that have steep slopes, vegetation is better preserved, thanks to the corrals located around the camp or across the slope. In the course of research, the areas of degraded pastures and the consequences of erosion processes were studied, where the composition of the plant community was determined. Crops with high accumulating properties were sown in degraded areas to reduce toxic elements in the soil.
The effect of far-red light on the productivity and photosynthetic activity of tomato
Authors: Dorokhov A S , Smirnov A A , Semenova N A , Akimova S V , Kachan S A , Chilingaryan N , Glinushkin A P , Yu Podkovyrov I
Published: February 2021

Annotation

It is known that far red light is not a source of photosynthetic energy, but affects the adaptation and development processes of plants. Most of these studies are conducted on young plants, but it is important to understand how high-beam light affects the biochemical composition of tomato fruit, which determines the taste and useful properties. The effect of long-range red radiation on the morphological and biochemical parameters of a tomato plant grown under artificial irradiation with LEDs with a different ratio of red and long-range red radiation from 2 to 9 with the same spectral composition in the range 400÷700 nm was studied. The intensity of photosynthesis was assessed by the content of photosynthetic pigments, and the biochemical analysis of tomato fruits included the determination of the concentration of nitrates, ascorbic acid, monosaccharides, and dry matter. It was found that long-range red radiation reduces the stress effect of blue led light, which is expressed in a lower concentration of anthocyanins in tomato leaves. Additional long-range red in the spectrum of LED R26 G81 R93 FR49 mmol/m2 s increased the yield of tomato plants 'T-34' F1 by 60% compared to HPS, and by 16% compared to led irradiation without the use of additional long-range red (R26 G80 R94 FR10 mmol/m2 s). The dry matter content in tomato fruits increased by 8-10%, while the number of fruits per plant increased by 42% compared to HPS and by 21% compared to led irradiation without the use of additional long - range red. The content of monosaccharides in tomato fruits 'T-34' F1 in the variant with the use of additional long-range red is 20% higher compared to HPS, and 2 times higher than this indicator compared to LED without the use of additional long-range red irradiation. The use of additional long-range red radiation improves the appearance and nutritional value of tomato fruits.
DYNAMICS OF COENOPOPULATIONS AND DISTRIBUTION ASCLEPIAS SYRIACA L. IN VARIOUS HABITATS OF AGRICULTURAL LANDSCAPES AND ADJACENT LANDS IN CENTRAL RUSSIA
Authors: Cherniavskih Vladimir I. , Dumacheva Elena V.
Published: February 2021

Asclepias syriaca L. is species-introduced with high potential as a source of biofuel, an important fodder crop for beekeeping, a possible source of biologically active substances. However, the species has a high invasive activity and may pose a threat to the biodiversity of natural plant communities. And also pose an economic threat to agroecosystems as a segetal species. In agricultural landscapes of central Russia in various habitats the dynamics and state of coenopopulation of the introduced in the crop species A. syriaca, which has a high potential invasive hazard at this moment, was studied. Research was conducted in 2012, 2018 and 2019 in the Belgorod region near the village Kulma, Novooskolskiy urban district. To assess the dynamics of the distribution A. syriaca in 2012 a polygon was formed for stationary observations on an area of about 5000 ha called Stationary “Kulma”. Modular coenopopulations growing in various habitats were identified within this stationary. In the process of research in the conditions of agrophytocenoses and adjacent lands of the South of the Central Russian upland there is a tendency to increase the area of populations of the introduced but invasive species of A syriaca in a wide range of habitats. The fact of species-introduced A syriaca into zonal types of steppe vegetation with a tendency to increase its share in phytocenoses with possible further displacement of native species by it is established. In the conditions of habitats adjacent to agrophytocenoses, A. syriaca forms stable full-fledged populations with high seed productivity and high aboveground phytomass, which are most productive in the ecotone conditions of bayrach forests, forest belts and fallow lands. The species has a high ability to introduce agrophytocenoses to cultivated land, this makes it an extremely dangerous component of segetal communities in the Central Chernozem region, capable of causing significant economic damage. It is necessary to monitor population A syriaca in all regions and develop measures to prevent its widespread distribution in agrophytocenoses.
Diagnosis of fungi of the genus Fusarium and Alternaria, Bipolaris, causing diseases of sunflower, and immunological methods for the evaluation and selection of genotypes to the pathogens
Authors: Glinushkin A P , Ovsyankina A V , Kornyukov D A
Published: February 2021

The distribution of Fusarium, Alternaria and Helminthosporiosis on sunflower crops was studied. The primary mass screening of sunflower cultivars for resistance and endurance to pathogens of rot of sunflower roots and baskets was carried out in laboratory, greenhouse and field conditions. Immunological assessment and selection of varieties resistant to pathogens of sunflower root rot was carried out to a mixture of the most common types of pathogens on an infectious background in laboratory and greenhouse conditions. In an infectious nursery, moderately affected samples are evaluated for the most harmful pathogen species. The dynamics of the development of the disease was studied.
Alkaloids from the sea sponges as stimulants of growth, development and productivity of agricultural plants
Authors: Klykov A G , Utkina N K , Chaikina E L , Murugova G A
Published: February 2021

The natural world of the Far East Russia has great potential for the detection and isolation of biologically active compounds that can increase productivity of agricultural plants in the zone of risky agriculture. Growth regulating activity of metabolites of marine organisms -alkaloids were studied. Damirone B (1), debromohymenialdisine (2), and dibromoagelaspongin (3) were tested in field conditions as growth stimulants of barley (Hordeum vulgare L.), wheat (Triticum aestivum L.) and common buckwheat (Fagopyrum esculentum Moench). It was shown that the stimulatory effects depend on the chemical structure of the alkaloids and the plant species. Compounds 1, 2, and 3 at different concentrations, stimulate growth and productivity of barley, wheat and buckwheat. Their introduction into practice will increase plant productivity, and hence the profitability of crop production.
Biological testing of zeolites as herbicide sorbents
Authors: Spiridonov Yu Ya , Chkanikov N D , Spiridonova I. Yu. , Nasakina E O , Glinushkin A P
Published: February 2021

Biological studies to study the possibility of removing the phytotoxicity of soil residues of the Singer herbicide using various types of zeolites showed that their effectiveness depends both on the nature of the zeolite and on the application rate. Adequate conditions for testing zeolites for the protection of spring rapeseed from residues of metsulfuron-methyl in the soil were selected. It is shown that neutral zeolites at a dose of 100 kg / ha protect the root system of plants from the inhibitory effect of metsulfuron-methyl.
Analysis of the bearing capacity of the normal section of regional confined concrete flexural members
Authors: Zhou Jianying , Li Lidan
Published: February 2021

In this paper, a static failure test was carried out on a confined concrete beam and a normal reinforced concrete beam. The theoretical and experimental bearing capacity of ordinary reinforced concrete beams and regional confined concrete beams are analyzed. The experimental and theoretical calculation results show that the regional confined concrete beam can effectively increase the bearing capacity of the beam without changing the section size. Since ordinary reinforced concrete participates in the compression zone in order to consider the compression zone, the calculation formula for regional confined concrete beams given in the code is conservative.
Research on Mechanical Performance of the Connection of Fabricated Primary and Secondary Steel Beam
Authors: Zhao Junyang , Chu Huaibao , Wang Xinwu , Bu Xin
Published: February 2021

Due to many advantages, prefabricated buildings are the trend of future development. In order to study the mechanical properties of the steel structure beam-beam connection node, referring to related materials, this paper designs a bolted connection node between main and secondary steel beams. By changing the key parameters such as the thickness of the supporting plate and the diameter of the bolt, the finite element software ABAQUS is used to simulate the primary and secondary beam nodes. Based on the finite element results, the force mechanism, failure mode, flexural bearing capacity and rotational stiffness of the nodes are analyzed, and some parameter design suggestions are proposed: the thickness of the supporting plate should not be less than 8mm, and the bolt diameter should not be less than 20mm.
Experimental study on dynamic stress dynamic strain relationship and dynamic modulus of reinforced expansive soil
Authors: Tang Xianyuan , Wang Shihai , Cheng Feng
Published: February 2021

Dynamic triaxial tests are carried out on saturated expansive soil of Qinchong Road, Guangxi at different compaction degrees, numbers of reinforced layers, confining pressure, dynamic stress dynamic strain relationship, and dynamic modulus attenuation law under frequency combination to study the dynamic characteristics of reinforced saturated expansive soil under different influencing factors. Results show that the dynamic constitutive relationship of the saturated expansive soil when the loaded waveform is a half-sine wave conforms to the R. L. Kondner hyperbolic model; the dynamic elastic modulus decreases with the increase of dynamic strain, and the relevant fitting parameters are given. A dynamic elastic modulus attenuation model considering different degrees of compaction, numbers of reinforced layers, confining pressure, and frequency is proposed through regression analysis of the test results.
Constructions of earthquake scenarios based on virtual simulations
Authors: Tian Dan , Song Wenjie , Qu Tonglei , Zhou Baijia , Lu Xiangyang , Liu Yuhua
Published: February 2021

The earthquake is an emergency with low probability and high risk. Constructing a real earthquake disaster scene can be used for earthquake emergency exercises, and timely inspection of escape, self-rescue and mutual rescue, and government decision-making deficiencies. Conducting the earthquake exercises under realistic conditions is not easily realized. Compared to the previous methods, the method based on virtual simulations is considered as one of the best effective ways. In this study, we employ the virtual simulations to construct earthquake disaster scenarios. The disaster scenarios immerse people in a virtual environment, where they learn to respond to earthquakes. We demonstrated the system architecture and its components, adopted 3dMAX and virtual simulations to reconstruct the modeling and reproduction of the regional topography, the city and the roads, bridges, hospitals, and building collapses in disaster areas. Virtual reality technology is used to realize the construction of the virtual city. Tests show that the system has good stability and effect, and reached the target set by the system.
Study on Compaction Characteristics and Construction Control Index of Gravel Materials in a Core Wall Dam
Authors: Wang Long , Wang Xiaogang , Zhao Jianming , Huang Renlong , Yang Zhengquan , Ma Rongfeng
Published: February 2021

Gravel materials are widely used in dam engineering in western China due to their excellent engineering characteristics such as high compaction density, high shear strength and strong water permeability. The compaction standard of gravel materials is evaluated by the relative density index. Therefore, after a reasonable compaction standard is determined, the next most critical link is the control of construction filling quality. Based on the results of field rolling tests, this paper analyzes the basic influence laws of gravel content, paving thickness, rolling times and water content on the compaction dry density and relative density of gravel materials, and studies the basic compaction characteristics of gravel materials, and determines the construction compaction parameters based on satisfying the design compaction standard. By controlling the gradation, rolling parameters and water content of dam construction gravel materials, the filling quality of dam construction can meet the design compaction standard, so as to ensure the safety and stability of dams.
The comparison analysis of earthquake resistant behavior between frame structure and frame shear wall structure
Authors: Wang Hongzhen , Wang Lei , Yan Kai
Published: February 2021

According to the investigation of earthquake damages in China and abroad, the earthquake resistant behavior of frame shear wall structure is better than that of frame structure. Compared to the reinforced concrete fame shear wall structure, the fame structure is easier to be damaged under the action of earthquakes. In this paper, the five-storey frame structure model is taken as the research object, and a certain number of shear walls are reasonably arranged to form a frame shear wall structure to compare and analyze the earthquake resistant behavior of the two structures. The analysis results show that the frame shear wall structure can achieve good earthquake resistant behavior compared with the frame structure.
Manufacturing technology and cost analysis of SFRC segment
Authors: Wang Bin , Deng Yisan , Cheng Xiaopeng , Li Deming , Zhang Shijie
Published: February 2021

The manufacturing technology of SFRC segment is introduced. The main differences between SFRC segment and ordinary reinforced concrete segment are clarified. The cost norm of SFRC segment is established. By studying material and mechanical consumption in the production process of SFRC segment, the entire-cost of SFRC segment is obtained. Based on the production and application process of SFRC segment in the test section of Qingdao Metro Line 1, the engineering cost of SFRC segment and ordinary reinforced concrete segment were compared and analyzed.