bluuebunny/crossref_metadata_2025 huggingface dataset:
Innovative entrepreneurship as a factor of the sustainable development in Irkutsk region
Authors: Klepikova T V
Published: January 2021

The introduction of high technologies in activities of small and medium-sized businesses is a priority task of sustainable development of Irkutsk region. The state is taking measures to support small and medium-sized businesses in the form of tax deferral, financial assistance and a number of benefits to enterprises in the spheres of activity most affected by the pandemic. Budgetary funding of scientific research of universities and other scientific organizations is a prerequisite for development of innovative products. Financial support of innovative technology parks, science cities, innovation centers for the transfer of improved technologies contributes to the introduction of practical modernized goods and/or services sold by small innovative enterprises. Young entrepreneurs between the age of 18 and 30 can receive grants for R&D or subsidies for development of technological production. Small innovative businesses are very risky, so applicants apply for grants from entrepreneurship support funds or investments in venture capital funds. In addition, entrepreneurs use modern innovative technologies to improve their knowledge and skills on the basis of online coworking, crowdfunding and crowdsourcing platforms. However, one of the main components of an innovative breakthrough is the system of education, research and development based on fundamental sciences. Sustainable development of small innovative enterprises is carried out through the creation of technology parks.
The resource-climatic potential of urbanized territories (a case study of the city of Irkutsk)
Authors: Korytny L M , Bashalkhanova L B , Maksyutova E V , Sorokovoi A A
Published: January 2021

A combination of average conditions for the diffusion of pollutants in the city of Irkutsk and significant volumes of emissions are the chief cause of a very high air pollution index during a long (longer than 20 years) period. In current conditions, the influence of the climate/atmosphere of the city of Irkutsk on the living conditions of the population implies an exceedance of hygiene standards in a year, on the average, for 5–6 pollutants. Furthermore, the composition and concentrations of pollutants are changing but the concentration of suspended material remains stably high (up to 2.4 MPC). Of particular concern is the largest exceedance of MPC for benzo(a)pyrene (up to 7.8 MPC), which is due primarily to a low quality of fuel used by mobile and stationary sources of emissions. The microclimatic characteristics of the city in the winter period were used to identify territories with a different temperature regime. The air temperature in low places is lower by 1.0–3.6 °C than at the Basic Irkutsk Observatory weather station. A large scatter in the deviations is caused by the warming influence of the Angara and by the infrastructural characteristics of the city. On the slopes and in elevated areas in the city center and outskirts, the temperature deviations do not exceed ± 0.5 –2.0 °C, respectively.
Geoinformation approach to assessing environmental risks of the investment economy in Primorsky Krai
Authors: Egidarev E G , Bocharnikov V N , Lindberg I V
Published: January 2021

The article presents the analysis of promising directions for the development of a green economy for nature in the Primorsky Krai in the context of supporting a favorable investment climate declared by the Regional Government. We prove that using the method of spatial comparisons of a multilevel nature, tasks to determine the degree of territorial-demographic development and actual territorial settlement are successfully addressed investment zoning is carried out, including at the local level the display of settlements of all types, the most important industrial and residential infrastructure, buffer zones of the anthropogenic impact of settlements, transport networks, communication lines, etc. We recommend to modernize the environmental system of existing and planned Protected Areas as well as substantiate the need for the development and implementation of a specific program to improve economic mechanisms for the preservation of natural ecosystems. The article describes our experience in developing a scientific and information basis for assessing the environmental risks of external and internal investment in the economy of Primorsky Krai. We consider the feasibility of the development of the “Ecoinvest” reference and expert system to provide public and scientific information expertise related to the conservation of biodiversity and areas of high conservation value.
Landscape diversity of the Preolkhon region
Authors: Bilichenko I N
Published: January 2021

The Olkhon region is one of the most popular holiday destinations on Lake Baikal, but spontaneous recreational development threatens the preservation of the region’s landscapes. The situation does not change even though a significant area of the Olkhon region belongs to the Baikal National Park, the uniqueness of the flora and fauna of which surpasses any other protected territory of the Baikal region. Geosystems studies were carried out on the southeastern macroslope of the Primorskii Ridge, in an area that stretches along the western shore of Lake Baikal for 50 km. Regional patterns, characteristics of climate and relief, differentiation of vegetation and soils, and features of the modern use of the territory were taken into account. At the same time take into account the regional patterns, characteristics of climate and terrain, vegetation and soil differentiation, especially of the modern use of the area. Construction and use of recreational facilities and the movement of vehicles is the main factor in an anthropogenic influence on the landscape of the study area. The landscapes of this site have a pronounced altitude-zonal structure. The goletz and mountain-taiga complex of the Primorskii Range alternates with the subtaiga steppe geosystems of the Preolkhon plateau. We carried out route surveys from the foot of the range to the mountains on four sites of the study area. These are the most interesting, popular places (routes) of the Olkhon region.
Analysis of slope stability of a segmental concrete block wall and geogrid in Meulaboh–Geumpang road
Authors: Yunita H , Chairullah B , Ambiya R
Published: January 2021

Landslide disasters are often a threat to the smooth transportation and economy of the community. Meulaboh-Geumpang crossroad, located in the western coastal region of Aceh Province, is one of the landslides-prone areas. Thus, the appropriate solution is necessary for preventing and handling the landslides in this area. This study conducted slope reinforcement using segmental concrete blocks combined with geogrids. The planned vertical distance of the geogrid (Sv) was 0.2 m, 0.4 m, and 0.6 m, while the length of the geogrid plan was 1 meter outside the failure envelope of the slip surface at the existing condition. The slope of the planned slope angle for the installation of the concrete blocks was 45°, 60°, and 90°. The dimensions of segmental concrete blocks were 20 cm high, 30 cm wide, and 40 cm long. The safety factor, at the condition after overall reinforcement, reached an acceptable amount for handling, only at STA 84 + 280 with a slope of 90°. A reinforced concrete beam was not added to the foot of segmental concrete blocks because it did not meet the acceptable safety factor, which was 1.32. The result of this analysis is to provide useful information about the form of a landslide that occurred. It will also inform the best combination of concrete block wall reinforced with geogrid for the reinforcement on the slopes. Thus, relevant parties can use it for landslide handling in these locations.
Are vertical evacuation buildings in Banda Aceh meeting the building standards?
Authors: Idris Yunita , Syamsidik  , Haiqal Muhammad , Fasya Amirah , Wahyuni Sherlya , Tursina
Published: January 2021

The tsunami vertical evacuation buildings in Banda Aceh were built after tsunami in 2004. The buildings were intended as one of the mitigation strategies for the community that live in the tsunami prone zone area. The buildings should be designed as a robust structure that can resist the earthquake and tsunami impact. Previously, there were no national standard for the design of tsunami resistant structure. The state of damage buildings that had been considered was only based on the result of an earthquake impact, which include the ground shaking, soil failures, and surface fault ruptures. As the Standard in Indonesia did not cover the tsunami load, it is important to review the capability of the existing vertical evacuation in Banda Aceh. The study is aimed to explore the capability of the existing tsunami evacuation buildings as the vertical evacuation in Banda Aceh. The observation includes the tsunami load assessment of the buildings based on the existing standard that had been used internationally. The existing vertical evacuation buildings in this study is analysed for the performance based on the International standard (The Federal Emergency Management Agency FEMA P646 2012) for tsunami loading impact and the earthquake performance was based on the national standard (SNI 1726 2012). The model of the building structure was generated using software structural anaysis, i.e. SAP2000. The earthquake simulation was based on the 2004 earthquake scenario that input as the dynamic loading. The tsunami loading was analysed using the static analyse. The data of tsunami characteristic such as tsunami inundation and speed were using the data from the existing data and research. The results show that the building needs to be strengthening, as it will suffer the large inter-story displacement in the first and second floors.
The provision of travel advice to tourists visiting disaster area: The case of Banda Aceh
Authors: Caisarina Irin , Omar Shida Irwana , Rafie Mahirah bt , Afandi Nur Afini Ahmad
Published: January 2021

Banda Aceh has much revived and transformed into a better degree from the devastating tsunami disaster in 2004. Structural, infrastructure and social transformation have led to the economic growth of the city. One of the contributing factors to the growth is tourism. The number of tourists visiting Banda Aceh has increased progressively every year, with the most significant number coming from neighbouring countries such as Malaysia. To support the tourism development sector, Aceh needs a sufficient infrastructure, high-quality services and complete information about the disaster mitigation preparedness since most of the places of interest, namely the tsunami historical sites, are located in the tsunami-prone area. Lack of official information about the disaster mitigation preparedness becomes one of the critical issues that need to be provided by the government. This paper evaluates the readiness of Banda Aceh Government and its agencies in providing disaster mitigation information to tourists. Data was gathered from a series of interviews conducted with travel agents (tour guide) and Malaysian tourists in April 2019. This paper argues that in the emergence of special interest tourism called ‘disaster tourism’ or ‘dark tourism’ in Aceh’s tsunami-prone area, the availability of disaster mitigation guides or travel advice for tourists are still lacking and need urgent solutions. This paper addresses some practical recommendations for Banda Aceh Government to undertake the issues.
Bridging Aceh’s disaster risk reduction strategies within the 2005 Aceh Peace Agreement (Helsinki MoU) Agendas
Authors: Syahbandir Mahdi , Rahman Alfi , Hasan Effendi
Published: January 2021

The tsunami that occurred on December 26, 2004, devastated and damaged Aceh’s coastal area. Several months after the event, the Aceh peace agreement was signed between the Free Aceh Movement (Gerakan Aceh Merdeka, GAM) and the Government of Indonesia (GoI) in 2005. This study aims to analyze the integration of disaster risk reduction strategies within the 2005 Helsinki MoU agendas. By employing multi-dimensional perspectives, this study highlights the development process of the Aceh DRR strategies within the 2005 Aceh peace agreement agenda. The data was collected and analyzed by reviewing some of the relevant documents. This study also included interviews with the key persons involved during the conflict and DRR actors. The result shows that the disaster and the 2005 Helsinki MoU have brought Aceh to be more conducive in implementing development within important sectors such as infrastructure, spatial planning, education, and the environment and building initiatives at the community level, both formal and informal. It should be noted that the result indicates that DRR strategies had no direct relation to the strategic issues as implemented of the 2005 Helsinki MoU.
Research on the Construction of Ocean Big Data Platform and Disaster Prevention and Mitigation Application Based on Internet of Things
Authors: Chen Chen , Zhang Yao , Shi Xiaoyong
Published: January 2021

The marine disaster prevention and mitigation information service system is a system that can provide information services for marine disaster management decision-making departments and the people. The paper further puts forward the capability objectives of the digital ocean system based on the big data platform of the Internet of Things and the overall framework of the six-level system including the sensing layer, transmission layer, data layer, and application layer, and analyses the safety of the big data platform based on the ocean of things Risks put forward the development requirements for the security of marine big data platforms, and provide references for the planning and construction of marine security systems in the big data era.
Study on Influencing Factors of Throat-like Residual Oil
Authors: Han Peihui
Published: January 2021

The microscopic visualization model is used to carry out oil displacement experiments, to test the interfacial tension of the ASP system, and to study the effect of different conditions on the throat-like residual oil by recording dynamic images of the residual oil during the displacement process. The results show that: when the concentration of polymer and alkali is unchanged, the higher the concentration of surfactant, the lower the interfacial tension of the ASP system; the water-wet attribute model is more conducive to the oil displacement system's use of residual oil. The lower the interfacial tension of the ASP system, the better the effect on the throat-like residual oil. when the interfacial tension reaches 10-2, the effect is obvious; after water flooding, the pore-throat ratio and the maximum diameter of the pores have little effect on the residual oil distribution. It has an effect on the residual oil distribution of the minimum diameter of the pores. After the ASP flooding, the large pore-to-throat ratio, the small minimum diameter, and the small maximum diameter have a greater impact on pores with different wettability.
Influencing Factors and Projections of Coal Price
Authors: Zhang Wenlong
Published: January 2021

The price of coal is related to the healthy development of China's coal industry and the national economy and people's livelihood, and has important research significance. The coal price is not only regulated by the relevant departments of the state, but also affected by the domestic coal market. In this paper, we systematically analyze the internal and external factors of coal price, and study the formation mechanism of domestic coal price and the main problems existing in the current coal price.
Research on Stress Factors and Countermeasures of Submerged Plant Community Construction
Authors: Chen Yihai , Liu Wenfang
Published: January 2021

Submerged plants play an important role in restoring the ecological environment of waters, and researchers have conducted extensive research on them. On the basis of summarizing the literature, stress factors such as nutrients, light, algae, and sediment were mainly introduced, and the possible future development direction of submerged plants was proposed, in order to provide reference for the research and application of submerged plant community construction.
Research on the Effect of the Dustfall on the Statue Surface on the Water Migration of the Earthen Layer
Authors: Qiu Liping , Qiao Jiawei , Ma Linyan , Yang Yaogui
Published: January 2021

In order to study the influence of salt in the dustfall on the statue surface on the water migration in the earthen layer, this paper compared the relationship between the moisture content, electrical conductivity, and soluble salt content (Cl−, SO4
2−, K+ and Na+) with the sample height of the soil in the coarse-fine mud and the soil before-after desalination, after the migration of the simulated earthen test block under different relative humidity stabilizes. The result shows: When the dustfall salt migrate to the earthen layer, its salinity will migrate downward at the upper end of the test block; When the interaction between the dustfall salt and the water of the earthen layer, the electric conductivity and soluble salt content in the test block are increase with the increase of sample height, and quickly increase above the test block 6.7cm; The effect of coarse- fine mud layer on electrical conductivity and ion content is not significant, and the electric conductivity and soluble salt content in the test block containing salt were obviously higher than those in the desalted test block. Overall, the dustfall salt, as exotic salinity, plays a certain role in promoting the production of salt damage in the statue and promotes the ability of the water-salt transport in the earthen layer which will aggravate the corrosion of the statue surface.
Effects of Regulated Deficit Irrigation on soil nutrient, microorganism and enzyme activity of Isatis indigotica
Authors: He Xiucheng , Wang Yucai
Published: January 2021

The changes of soil ecological environment caused by different degrees of water deficit will affect the sustainable planting of soil, so it is of great significance to explore moderate water deficit and maintain a good ecological environment with sustainable soil. In this study, the effects of water stress on soil nutrients, microorganisms and enzyme activities of Isatis indigotica in Hexi corridor were studied by Mulched Drip Irrigation. The results showed that it was beneficial to the absorption and utilization of available phosphorus and available potassium in the soil of the root of Isatis indigotica by mild water deficit, increased the number of fungi and actinomycetes in the soil, and did not affect the activity of urease in the soil from 0 to 20cm. It was resulted in slow absorption of available phosphorus and available potassium in the soil and significantly decreased soil urease activity by severe water deficit, but it did not affect the number of fungi and actinomycetes. Therefore, mild water deficit is helpful to improve the utilization of soil nutrients and soil enzyme activity. This study provided a theoretical basis for the standardized planting of Isatis indigotica in northwest arid region on the basis of efficient water saving.
On Optimization Design of Sunshade Components for Qinba Mountain Buildings
Authors: Zhu Yiyun , Wang Xianling , Fan Xiaona
Published: January 2021

Improving indoor thermal comfort and reducing building energy consumption are the main ways to realize sustainable development of buildings. In view of the phenomenon of indoor overheating in traditional buildings in Qinba mountain area in summer, it was proposed to add sunshade components to the south-facing Windows for improving indoor thermal comfort. Ecotect software was utilized to study the influence of common shading components and shading louvers under different parameters on solar radiation in the south-oriented window. The results demonstrated that the shading louver has the best shielding effect on the integrated radiation. Finally, ANSYS.CFX was used to study the influence of shading louvers with different blade widens and angles on natural ventilation. Considering the influence of louver parameters on radiant heat gain and natural ventilation, it was recommended to choose louvers with a width of 200 mm and an Angle of 30°, which can effectively block 70% of the solar radiation heat gain of the south window and increase the ventilation potential by up to 15%.
The influence of the high-pressure rotary jet formed sealing curtain on the stability of plug-in steel cylinder
Authors: Liu Wenbin
Published: January 2021

The plug-in steel cylinder was widely used for man-made island construction as the bulkhead wall in nearshore soft soil area. In order to maintain the dry working condition inside the bulkhead wall, the high-pressure rotary jet formed sealing curtain should be built up under the steel cylinder and the connecter between steel cylinders. During the dewatering process inside of the bulkhead wall, a water pressure difference between the inside and the outside of the bulkhead acts on the steel cylinders. This water pressure difference threatens the stability of steel cylinders, even leads to the crash of the steel cylinders when the steel cylinder was installed on the high-permeability soil layers. This paper analyzes the seepage field and the displacements of the cylinder during the dewatering process according to data from an engineering case, and highlights the effect of high-pressure rotary jet formed sealing curtain on maintaining the stability of cylinder.
Study on Speciation Chemical Analysis of Rare Earth Elements in Soil Based on Green Environmental Technology
Authors: Fu Yao , Lou Lianxin , Hu Ximeng
Published: January 2021

The impact of rare earth elements on the soil environment is not only related to its total amount, but also more closely related to its chemical form. The green and environmentally friendly acid digestion and morphological continuous extraction methods were used to extract and analyze the total amount of rare earth elements and the forms of rare earth elements in the soil samples. Inductively coupled plasma mass spectrometry was used to determine the content of rare earth elements and the content of rare earth elements in the soil samples. Form content. The results show that the content of rare earth elements in the collected soil samples is 200-1418mg/kg, and the content of light rare earth elements is much higher than that of heavy rare earth elements; the recovery rate of the sum of the combined forms of rare earth elements relative to the total amount is 88.2% to 110%, indicating that the continuous extraction method is suitable for the analysis of rare earth elements in soil samples. The rare earth elements in soil samples mainly exist in the residue state, which is 33%-80%; the co-precipitation state of crystalline iron and manganese hydroxide is 10%-31%; the adsorption state of humus and amorphous oxide is 5.0%-18%; The exchange state and the carbonate combined state are 4.0% to 23%; the amorphous iron-manganese oxide co-precipitation state is less than 3%. The influence of the location of the sampling point and the nature of rare earth elements on the content of rare earth elements was analysed, and the influence of soil properties on the distribution of morphology was discussed.
Numerical Study on the Structural Safety of the Slideway Project in a Mountainous Tourist Attraction
Authors: Guo Yanhui , Yang Yi , Yang Zhiquan , Ao Fuxing
Published: January 2021

In order to study the safety of the slide way in a mountain eco-tourism scenic spot, based on the actual design parameters of the slide, a three-dimensional mechanical simulation model was established by numerical simulation method, and the stress and displacement distribution of the slide after its completion were calculated under the condition of self weight and load. The results show that after the construction of the slide way, the maximum principal stress of the slide is mainly compressive stress, which is beneficial to the performance of the main steel structure. The displacement in three directions is small, and the reliability of each component meets the requirements. After the slide is put into use, the maximum principal stress increases with the consideration of human load, which does not exceed the allowable stress value of the structure. The displacement of the slide in three directions is small, which shows that the reliability of each component is good under the condition of human load in the service stage, and basically meets the requirements of use. The research results have important reference value for the safe operation of the slide.
Research on Prediction of Metro Surface Deformation Based on Ensemble Kalman Filter
Authors: Li Zengxin , Luan Yuanzhong , Liang Yaodong , Ji Zhaolei
Published: January 2021

In order to improve the prediction ability of the statistical model of the subway surface deformation, the equal-dimensional innovation grey system theory model and Kalman filter model are used to predict the surface deformation of the subway. The ensemble Kalman filter (EnKF) algorithm is used to assimilate the two groups of prediction data to improve the accuracy of the prediction data. The absolute difference and the root mean square error between the EnKF assimilation prediction data, the Kalman filter prediction data, and the equal-dimensional and innovation grey model prediction data and the measured data are compared and analysed. The results show that the accuracy of EnKF assimilation prediction data is greatly improved compared with the prediction data of grey system theory model and Kalman filter model, and the short-term prediction effect is better.
Calculation of Damage Caused by Blasting Vibration on Surrounding Rocks of Water-conveyance Tunnel across the Yellow River
Authors: Zhou Xianqi , Ye Jinbi , Chen Feng , Wang Bowen
Published: January 2021

The commonly used method for tunnel excavation is the drilling and blasting method, but the surrounding rock will accumulate damage under the action of blasting, leading to engineering accident, and the consequences of the accident in the Yellow River-crossing tunnel will be more serious. The work proposed a quantitative evaluation calculation of the damage on surrounding rocks caused by tunnel blasting excavation to study the effect of tunnel blasting on the damage of surrounding rock. analyzes the damage plasticity model theoretically, and determines the rock constitutive curve used in the numerical calculation of vibration damage, based on which plane physical model is established to adopt several different stress control standards to calculate the vibration damage of surrounding rock. The results proved that in the damage settlement of planar model 1, the damage variable around the tunnel was 0.14 at the maximum and 0.10 at the minimum. In the curtain grouting area, the maximum damage variable was 0.05, and the minimum was 0.01. In the damage settlement of planar model 2, the damage variable around the tunnel was 0.45 at the maximum and 0.05 at the minimum. In the curtain grouting area, the maximum damage variable was 0.20, and the minimum was 0.05.the impact of blasting vibration on the surrounding rock is mainly concentrated near the cavern, Thus, with the rock depth increasing, the damage decreased. the damage in the grouting curtain area is relatively small. The results accurately reflected the damage caused by blasting vibration on surrounding rocks and provided references for engineering construction.
Study on the Maturity of Construction Technology in China
Authors: Ke Yanyan , Qiu Yimin , Yang Zhengyu
Published: January 2021

The development and application of construction have two sides, advanced technology may lead to efficiency improvement and performance improvement, but may also because of the lack of technology itself, resulting in economic losses, security risks, ecological damage and other negative effects. Based on the CMM model, the paper takes construction technology as the research object, constructs the construction technology maturity evaluation system, and takes the data of the National Bureau of Statistics from 1999 to 2018 for nearly 20 years as the analysis sample to evaluate the construction technology maturity grade. On this basis, the paper puts forward some suggestions to improve the maturity of construction technology.
Research on Risk Assessment Index System of Expressway
Authors: Xiong Zhiye , Zhuang Yufeng , Hu Yanzhu , Wang Song
Published: January 2021

The safety of road infrastructure is the basis for safe operation of roads, and expressways, as high-grade expressways between freeways and non- freeways, involve roads, bridges, tunnels, traffic safety facilities and other infrastructure. Therefore, constructing a risk assessment index system for expressways is a prerequisite for the safety management of expressway operations, which helps to transform "passive processing" into "active prevention". In order to establish a comprehensive and systematic expressway risk assessment system, this paper from the perspective of systems engineering, uses the Interpretive Structural Modelling method to construct many risk factors of the expressway into a causal and hierarchical structure model. For solving the shortcomings of the poor accuracy of the subjective analysis method and the lack of interpretability of the objective analysis method, this paper adopts an improved subjective and objective analysis method to give weight to the indicators at various levels. So as to improve the scientificity of the risk assessment system of the expressway.
Research and application of solid-liquid dual material sand control technology
Authors: Li Huaiwen , Liu Wei , Shao Lifei , Wang Xiaofang , Wang Chao , Yan Yongwei
Published: January 2021

A new type of solid-liquid dual material artificial shaft wall sand control technology was developed for some special Wells (such as sidewall drilling, causing damage repair well, etc.) with low construction pressure and unsuitable mechanical sand control technology in dagang oilfield. The process is use solid and liquid mixing resin solution pump into the formation to form a complete artificial borehole wall, solid material filling the cavity of formation, act as proppant. Liquid as resin bonding agent, used for cementing solid material and formation of particles sand. In addition to evaluate the solid liquid double material of various performance indicators. Field test shows that this technology can be consolidated at well temperature, and the compressive strength can reach 8Mp and permeability can reach 1 μ m2 after consolidation. This technology has been successfully applied to sand control in 5 Wells in dagang oilfield and achieved good sand control effect.
Structure Design of Cable-Stayed Bridge Intelligent Detection Robot
Authors: He Hongyu , Hu Guichuan , Ren Jing , Hu Jing , Zhao Hang , Nie Tao
Published: January 2021

Cables are the main load-bearing components of cable-stayed Bridges. The durability and reliability of cables are directly related to the safe operation and service life of the whole bridge. Aiming at the problem of cable detection and maintenance, a new type of cable detection robot is designed in this paper. To further enhance the stability of the robot, the structure adopts symmetrical arrangement to make the center of mass of the robot system coincide with the cable axis. According to the working condition of the robot, a flexible body spring that meets the parameter requirements is designed, which not only meets the required preload, but also meets the starting torque of the motor. The robot is simple in structure, standardized in parts, easy to assemble and disassemble, and has good obstacle clearance ability and detection efficiency.
Application of multiple combination retaining structures on high slope
Authors: Yang Yixin , Ye Jinbi , Hong Chuanxiong , Chen Chaozi , Mao Lanyu , Lai Yili , He Xiaoli , Lian Liyu , Fang Yihang , Lian Jianbin
Published: January 2021

With the increase of the height of the filled slope, the application of multiple combination retaining structures (MCRS) is becoming more and more popular. However, the traditional design methods seldom consider the coupling effects between the substructures. To investigate the interaction of MCRS, this paper takes the filled slope project of a middle school in Quanzhou City, Fujian Province, China as an example. The filled slope was supported by MCRS, including reinforced soil, doublerow piles, anchors and counterfort retaining walls. The simulate procedure mainly included the following process: first, the MCRS model was established, then the mechanical response of the MCRS when replacing the fill materials and increasing the length of the rear row piles were obtained, and a comparative analysis was carried out. The following conclusions could be drawn: (1) The properties of backfill material have a significant impact on the displacement of backfill slope, and when the backfill is gravel soil, the displacement of slope can be controlled to a satisfactory degree. When the back-fill soil is replaced by silty clay, the shear strength and internal friction angle of soil become smaller, thus the displacement of slope increases significantly, which may lead to slope failure. (2) When the anchorage length is satisfied, increasing the length of the rear row pile has no significant effect on reducing the displacement of MCRS slope, but it can effectively reduce the axial force of anchor rod. (3) In MCRS, each substructure has complex interaction, and numerical simulation provides an effective means for accurate evaluation of MCRS.
Research on Intelligent Loading System for Container Ships
Authors: Wu Qingcai , Xia Qiucheng , Wu Maochuan
Published: January 2021

Container transportation is an important part of the global transportation industry, and its transport capacity affects the development of the global economy to a certain extent. Ship stowage is an important part of container transportation. Its intellectualization level determines the time of container ships in port and the frequency of overturning containers, thus affecting the efficiency and economic benefits of ship transportation. Based on the container ship stowage process, this paper analyzed the factors affecting the stowage, focused on the study of the composition of intelligent stowage system, and provided a safe and reliable idea for the construction of container ship stowage system.
Assessment and Early Warning of Geo-Environmental Carrying Capacity: A Case Study of Tianjin Binhai New Area, China
Authors: Miao Jinjie , Ma Wuming , Cui Kaipeng , Wang Zhiqiang , Zhang Ying
Published: January 2021

The geo-environmental carrying capacity (GCC) is to provide a scientific method for government to make a reasonable strategic decision for the land use planning and distribution of industrial structures. In this paper, the assessment indicators system and the assessment model of geo-environmental carrying capacity (GCC) based on the System dynamics (SD) theory were established for a case study of Tianjin Binhai New Area, China. Then the assessment model was applied to the land use planning of the study area. The results show that about 15 percent over loading sub-areas was eliminated in the Tianjin Binhai New Area by land use re-planning and adjustment of industrial structures. The study proposed a new method for the assessment and early warning of the geo-environmental carrying capacity.
Approbation of the data classification method based on the SVM algorithm and the k nearest neighbors algorithm
Authors: Demidova L A , Sokolova Yu S
Published: January 2021

The aim of the work is to test the classification method based on the combined use of SVM andkNN classifiers. At the first stage of the classification method, on the basis of the initial training dataset U, SVM classifier is developed and the width of the Ω area is determined. This Ω area contains all objects incorrectly classified by SVM classifier, which form together with correctly classified objects that have fallen into the Ω area and the corresponding object class labels from the Ω area a new datasetG. At the second stage of the classification method, thekNN classifier developed on the basis of information about the objects of the setU\Gis applied to all objects of the datasetGfrom the Ω area. The values of the parameters of thekNN classifier are determined experimentally in such a way as to ensure the highest possible accuracy of object classification. Since the correctly classified objects can also enter the Ω area formed in the above way, the condition for the applicability of the proposed method is a general improvement in the classification quality. The presented results of experimental studies confirm the effectiveness of the proposed method in the problem of classifying complex multidimensional data.
Technology for aerodynamic wake characteristics measurement behind an aircraft on a rail-guided track
Authors: Golovnev I G , Vyshinsky V V , Sokolov O V , Lapshin K V , Mukhachev P A
Published: January 2021

A framework for vehicle wake vortexes experimental investigation on a rail-guided track in sub- and supersonic flows is presented. Basic requirements for measurement system and results treatment are determined based on numerical modeling and wind-tunnel tests.
Hovering control algorithm validation for a mobile platform using an experimental test bench
Authors: Jatsun S , Emelyanova O , Lushnikov B , Martinez Leon A S , Mosquera Morocho L M , Pechurin A , Nolivos Sarmiento C A
Published: January 2021

This paper deals with the validation of a hovering control algorithm for a mobile aerial platform executed on a quadcopter pattern. In order to test and evaluate the proposed hovering algorithm in a safe and controllable environment conditions, an experimental test bench has been introduced. As part of the hovering control algorithm implementation process, a brief description of the dynamics and control laws of the quadcopter is presented. The considered control technique in this paper is based on PID control method. A program code has been written using Arduino IDE based on Arduino UNO microcontroller. A description of the conducted indoor experiment for the validation of the hovering algorithm, and also the main results of the performed practical experiment are presented
Layered composite for a geopolygon mire
Authors: Kondratov A P , Zhuravleva G N , Syltanova Y M
Published: January 2021

We have investigated flexible composite materials of test objects (mires) intended for setting the aviation optical equipment for remote sensing of the Earth. The brightness fields and control images of the mire contrasting elements are obtained by the method of ink-jet printing on banner fabric. We have proposed a new layered structure of the material for the operating contrast control. We have established quantitative patterns of changes in the optical characteristics of test objects when using an outer layer made of a transparent polymer film, which makes it possible to vary the characteristics of test objects for adjusting thermal imaging devices and aviation optical equipment using low-cost polygraphic methods.
Mathematical foundation of system design regulatory controls based on ARP4754A
Authors: Kulabukhov Vladimir
Published: January 2021

The article provides an interpretation and formal mathematical foundation in the language of modern algebra for V-process of designing complex systems recommended by the ARP4754A manual, in the context of a new paradigm in mathematical systems theory developed on the basis of the General principle of isomorphism. This provides a scientific basis for the widely used design approach
Analysis of post buckling state of composite rectangular panel with asymmetric structure on elastic base caused biaxial compression
Authors: Mitrofanov O , Klesareva M
Published: January 2021

Received analytical solution of geometrically nonlinear problem for investigation of post buckling of composite rectangular panel with asymmetric structure on elastic base. Panel deflection corresponds to conditions of rigidity support. Considered longitudinal compression of panel subject to constraint along the longitudinal edges which corresponds panel loading caused biaxial compression. Results can be used in the analysis of post buckling thin defects such as delaminations in laminated skins.
Post-buckling behavior estimation of composite panels of asymmetric structure with all-boundary rigid support with shear flows action
Authors: Mitrofanov O , Osman M
Published: January 2021

Analytical solution of geometrically non-linear problem of post-buckling behavior of thin rectangular plate of asymmetric structure with shear taking rigid support along all sides into account is obtained. Shown solution can be used for post-buckling behavior estimation of surface defect similar to delamination for composite panels.
Bayesian recognition of a moving object information-measuring system state: a priori information weight correction
Authors: Muzhichek S M , Sebryakov G G , Pavlov V I , Tolstych S V , Kenzhekhanova M B
Published: January 2021

Within the framework of the Bayesian approach, a method has been developed for recognizing signal-interference situations that arise during the operation of the information-measuring system of a moving object. The corresponding algorithms are presented. A method for correcting the weight of a priori information in the case of its significant difference from a posteriori information is proposed. One of the possible correction options using the so-called indicators of signals and interference accompanying signs is presented.
Fuzzy joint optimization of the design and operating modes of the induction heater
Authors: Rogachev N G , Rogachev G N
Published: January 2021

This article presents an approach to improving induction heating efficiency and discusses methods for maximizing it. The problem is reduced to a fuzzy optimal calculation of the parameters of the induction heater and the heater control program.
Improve the integrity testing process based on QFD, FMEA and TRIZ
Authors: Vysotskaya M V , Ya Dmitriev A
Published: January 2021

In today’s aircraft industry – competitiveness in the domestic and foreign markets, is the main criterion for the development of quality, a high level of which is achieved through methods and approaches: QFD, FMEA, TRIZ. There is a possibility of application of these methods at tests of production, for the purpose to meet expectations of consumers with the most optimum combination of characteristics of production. The design process is often associated with a compromise of conflicting parameters, which means increased costs and loss of quality. Innovation in the production process can create great value. The rapid development of modern technologies and the commercial environment suggests that the design of production processes requires the application of a systematic method of improvement. The proposed method combines a number of quality tools to support the process of modern development of aviation. In order to implement the acceptance improvement, it is necessary, first, to analyze the product testing process in accordance with the influencing parameters and use QFD (quality function deployment) to obtain the basic requirements for the testing process. Secondly, to find the contradictions of the testing process and analyze them comprehensively. To creatively solve the revealed contradictions, apply the Russian theory of inventive problem solving (TRIZ). When using this technique increases both the efficiency and maneuverability of the use of quality tools to solve technological problems. The effectiveness of the proposed method of improvement is illustrated and confirmed by the example of the process of testing the tightness of the hose of the life support system of the product “Bion – M”.
Hydrodynamic force and wave run-up due to diffraction of ocean water waves by a surface-piercing bottom-mounted compound partial-porous cylinder
Authors: Sarkar Abhijit , Bora Swaroop Nandan
Published: January 2021

Here we consider the case of a train of linear water waves incident on a bottom-mounted surface-piercing compound partial-porous cylinder consisting of two coaxial cylinders of which the upper cylinder is hollow with a thin porous side wall and the lower cylinder, with radius greater than that of the upper one, is rigid. Subsequently, we examine the associated hydrodynamic forces. Using linear water wave theory and eigenfunction expansion, the problem is developed in terms of suitable velocity potentials. The important boundary condition on the porous boundary is defined with the aid of Darcy’s law. The matching conditions across the linear interface between successive fluid domains arising due the continuity of pressure and velocity are suitably used. Thereafter, a system of linear equations arises in terms of the unknowns solving which the hydrodynamic force and wave run-up for the compound partial-porous cylinder are calculated. Various numerical experiments show the effect of different parameters, such as porosity of the upper cylinder, draft ratio, the ratio of radii of the upper and lower cylinders and the depth of water on hydrodynamic force and wave run-up. It is observed that the wave force takes higher values corresponding to lower values of radius ratio, draft and porous coefficients. Further, for fixed values of radii, porosity and depth, the wave run-up is observed to be more when the wavenumber takes increasing values. The obtained results establish that different parameters may be suitably chosen in order to design useful ocean structures which may be installed as wave-absorbers for various activities in ocean including capturing of wave energy. Further, such structures can also act as the base of windmills installed in oceans to extract wind energy. The efficiency of the model developed is validated by comparing it with an available established result from which an excellent agreement is observed.
Modelling of light scattering by gold nanoparticles at optical fibre interfaces
Authors: Wang Xiang , Benedictus Rinze , Groves Roger M
Published: January 2021

Optical fibre backscatter reflectometry is an important technique for Structural Health Monitoring (SHM). In recent years, increasing the intensity of backscattered light in backscatter reflectometry has shown the advantage of improving the signal detection in shape sensing and temperature detection due to the increase of signal to noise ratio and this approach could potentially be used to improve the performance of an SHM system. Doping nanoparticles (NPs) is a method to increase the intensity of backscattered light in distributed fibre optic sensing. The increased intensity of light backscattered by the NPs needs to be investigated to design suitable optical sensing fibres with NPs for backscatter reflectometry. In this work NPs were added to refractive index matching liquid and tested with commercial NP suspensions experimentally between the tips of two optical fibres. An estimate of the intensity of backscattered light from the NPs in this structure was performed by simulation to give a better understanding of the expected levels of intensities of scattered light from NPs in this distributed fibre optic sensing configuration. We present analytical models based on Mie theory and the Monte Carlo Method. Simulated results are presented, for a broad bandwidth Gaussian spectra shape incident light with a central wavelength around 1550 nm, to match the experimental conditions in this work. The novelty is in developing this model for scattered light by NPs at optical fibre interfaces and the evaluation of the possibility of detection by the calculated scattered intensity levels.