bluuebunny/crossref_metadata_2025 huggingface dataset:
Seasonal Variations of a Battery of Biomarkers and IBR Index for the Mussel Mytilus Edulis Transplanted into the Easternmost Shandong Peninsula
Authors: Yuan Mengqi , Wang You , Tang Xuexi
Published: September 2022

This study focused on field application of muti-biomarkers and Integrated Biomarkers Response (IBR) index in transplant experiment of Mytilus edulis for environmental assessment. Individuals collected from a clean area (S1) of Rongcheng City, were thus transplanted to four contaminated stations (S2, S3, S4, S5) in the coastal areas of easternmost Shandong Peninsula over a 1-year period. The activities of the oxidative stress biomarkers (CAT and TBARS), organic pollutant biomarkers (GST and AChE) and heavy metal pollutant biomarker (MT) were measured in transplanted mussels. The IBR was calculated to summarize the responses of biomarkers into one index and displayed as star plots. Therefore, it is possible to visualize contamination conditions between the selected sites. The purpose of the study was to screen out a set of suitable biomarkers and set up an IBR for bio-monitoring. Results showed: (1) the mussels from S5 were characterized by elevated activities of biomarkers in summer, and the highest IBR was seen at S5 in summer, S5 was the most polluted site. (2) There was good visual correlation between biomarkers and IBR variation. IBR was a useful tool to visualize biological effects of marine pollutants in mussel transplanting experiments.
Nonstationary Characteristics of Precipitation and Flood Response Under Changing Environment in Taihu Basin, China
Authors: Sun Lingkai , Hu Zichen
Published: September 2022

Change of the environment, namely climate change and human activities, is influencing hydrological cycles globally. Nonstationary changes have been widely detected in precipitation series, which has significantly increased the flood risk in various areas. Taking Taihu Basin as the typical study area, the nonstationary characteristics of precipitation are analyzed through the Mann-Kendall trend test, Pettitt abrupt change test, Sen’s slope estimator and Seasonality Index in this study. Spatial distributed daily precipitation data during 1979–2017 is used. An 1D-2D coupling hydrodynamic model is built by MIKE Zero to simulate the change of flood risk under the nonstationarity of precipitation. According to the results of statistical analysis, the precipitation of Taihu Basin shows increasing trends in various temporal and spatial scales. Especially, the torrential rain and extreme precipitation, which are the main cause of flood disasters of the basin, are increasing significantly especially in highly urbanized areas such as Shanghai city. According to simulation results, the increase of flood risk shows high correlation with the nonstationary change of precipitation. The results indicate a great impact of climate change and urbanization on the regional flood risk, which must be well solved during social and economic sustainable development.
Impacts of Pinglu Canal Construction and Its Ecological Route Selection on Landscape Pattern and Suggestions on Environmental Protection
Authors: Cheng Yinan , Liu Jie , Xu Honglei , Zhu Gaoru
Published: September 2022

The Pinglu Canal is the first artificial canal since the founding of the People’s Republic of China following the Beijing-Hangzhou Grand Canal. It is a major pioneer project for many national strategies, and bears great construction significance. Attractive natural landscape and ecological environment, and abundant tourism and cultural resources along the Pinglu Canal have raised a higher environmental requirement for its construction. In this study, the impact of the planning route of the Pinglu Canal on overall landscape pattern is analyzed from several aspects such as number of patches, mean patch area, largest patch index and fractal dimension. Besides, the impact of multiple routes of some sections on landscape pattern is compared for appropriate route selection. The suggestions for environmental protection strategies of canal construction are proposed from the perspectives of the protection and restoration of ecosystem, as well as the integration of tourism and culture. The results will provide references for landscape pattern impact analysis and ecological protection countermeasures for the constructions of other canals.
Thallium Contamination and Ecological Risk Assessment of Soil in Jiulong Alpine Mountain Area in Western Sichuan of China
Authors: Wang Wei , Yu Yang , Yu Feng
Published: September 2022

Owing to an increase in the critical mineral resources exploration and national ecological security construction, an environmental impact assessment was performed to evaluate the thallium contamination and ecological risk of soil in Jiulong alpine mountain area, western Sichuan Province, China. Based on the analysis of thallium content in 1037 soil samples, the pollution level and spatial variation of the thallium in all of the soil samples of the study area were comprehensively evaluated by multiple evaluation methods. The results show that, the thallium content in soil of the study region was 0.30–2.23 mg/kg with the mean of 0.94 mg/kg, which was slightly higher than soil background of “Three Rivers” regions (0.7 mg/kg) of southwest China and soil background value (0.6 mg/kg) of China. The overall trend is gradually decreasing from northwest to southeast. The parameters of geo-accumulation index indicates that the thallium pollution level in Jiulong alpine mountain area was generally low, most of them are less than 0.5, with the max Igeo 0.97. The soil as a whole has no potential ecological risk of thallium, which mainly under the control of natural geological background. Additionally, the investigation of this type of ecological environment survey provides insights for the sustainable development possibilities of critical mineral resources exploration in western Sichuan, China.
Analysis of Environmental Geochemical Characteristics of Atmospheric Deposition in Yellow River Delta, China
Authors: Zhang Yunfeng , Jia Qiang , Shi Houli , Wang Jitao , Shen Jianjun , Cao Qing
Published: September 2022

Atmospheric deposition is the main input route of some elements in soil. Heavy metals in the deposition matter have a significant impact on soil environmental quality. Taking Binzhou Economic Development Zone of Shandong Province as the investigation area, this paper studied the effects of heavy metal deposition on soil environmental quality were studied. Through the enrichment factor analysis and principal component analysis, it is found that elements such as Ni, Zn, Cd, Pb, Se, and F were affected by human activities to varying degrees and were significantly enriched. The comprehensive environmental geochemistry grade of dry and wet atmospheric deposition in the survey area is first class. It provides scientific basis for regional environmental health risk assessment and pollution prevention and control.
Study on Plant Selection for Highway Ecological Restoration Based on the Concept of Sustainable Development – Taking the Ecological Restoration of Wujiu Expressway in Gansu Province as an Example
Authors: Yuan Haonian , Wang Liang
Published: September 2022

In order to implement the concept of green highway and advocate the construction ideas of ecological harmony, resource conservation, service improvement and sustainable development, in the design process of Wujiu expressway, through the investigation and analysis of natural plants in the project area, the plant species in the project area are sorted out, and the shortcomings of the application of existing highway plant resources in the sustainable development of the project area are analyzed. According to the characteristics of Wujiu expressway, the utilization principle of plant materials for the project is determined. In order to meet the needs of slope ecological protection and sustainable development of greening landscape, the selection of plant resources is explored and studied. Starting from the principles of ecological adaptability, species diversity, ornamental value, and economic applicability, a vegetation survey was carried out. By comparing the three-plant slope protection combination schemes, scheme 1 was selected, namely: perennial rye 30% + bermudagrass 10% +Alfalfa 10%+Huzhizi 30%+Amorpha 20% is the best combination of slope protection plants. In addition, olive fruit, as a local economic crop in Wudu, can also be used as road service area, intercommunication area, and waste slag field. High-quality green plant species.
Analysis on the Interaction Between Vegetation and Soil Quality in Coal Mining Subsidence Area
Authors: Guo Yangnan , Zhang Kai , Bai Lu , Yang Yingming , Wang Yequan
Published: September 2022

As a “bridge” connecting soil, atmosphere and water, the dynamic change of vegetation can reflect the change of ecological environment in coal mining subsidence area to a certain extent. However, relying on traditional methods to extract vegetation coverage information in a large range not only consumes huge human and material resources, but also has low accuracy. Therefore, this study uses satellite remote sensing technology to extract vegetation coverage in coal mining subsidence areas. Based on the spatial variation laws of soil water content, pH, alkali-hydrolyzed nitrogen, available phosphorus, available potassium and organic matter content in coal mining subsidence areas, considering the impact of different types of surface vegetation (grassland, shrubs and trees), this study analyzes the interaction and distribution of each factor under coal mining disturbances, and puts forward reasonable maintenance suggestions to reduce the impact of coal mining disturbances on ecology. The results showed that: (1) Soil water content was negatively correlated with soil pH, and the correlation between the two was the best in the one-year subsidence area (SA), among which the shrub land had the highest correlation, followed by grassland and arbor land. The influence between soil water content and soil pH is timely affected by coal mining subsidence, grassland and shrub land are more sensitive, and arbor land is more stable. Soil water content was positively correlated with soil fertility, and the correlation was the best in one-year SA, among which shrub land had the highest correlation, followed by arbor land and grassland. Soil pH was negatively correlated with soil fertility. The shrub land in the unmined area, the 1-year SA, and the 2-year SA had a high correlation with the arbor land, among which the shrub land in the 1-year SA had the highest correlation. (2) The correlation between vegetation coverage and soil physical and chemical properties (PCP) is the best between shrub forest land in 1-year SA and arbor forest land in 2-year SA, which is medium. At the initial stage of subsidence, the vegetation coverage and soil PCP of shrub forest land respond in time. After increasing the subsidence years, the vegetation coverage and soil PCP of arbor forest land respond significantly. (3) Increasing the coverage of surface vegetation can effectively improve or alleviate the damage caused by coal mining to the PCP of soil. Planting arbor and shrub forests in the mining area can better protect the soil and reduce the loss of water and fertility.
Measures and Suggestions for Ecological Restoration of Highway Slopes in the Context of Green Highway in China
Authors: Li Qili , Zhu Gaoru , Liu Jie
Published: September 2022

To practice green development in highway construction and improve the theory slope ecological restoration, this paper analyzes the connotation characteristics and idea of green highway, and puts forward the needs and management suggestions of green highway idea for slope ecological restoration. The results show that: (1) the ecological restoration of highway slope should adapt to the needs of green highway development in the new period from five aspects: optimizing design, intensive using of resources, adopting different repair techniques, considering the life cycle costs and building beautiful highways. (2) The high-quality development of ecological restoration of highway slopes can promote from four types of initiatives: encouragement, compulsiveness, recommendation and guidance. The research results provide guidance and strategy for develops slope ecological restoration, which is conducive to promoting the transportation industry to practice green development and ecological civilization strategy.
Wind Erosion Characteristics of Degraded Grassland Under Different Management in Xilin River Basin
Authors: ABIyas  , Ge Nan
Published: September 2022

This study focused on the natural grassland that was not eaten by livestock in the degraded grassland of Xilin River Basin, and the grazing grassland that was heavily eaten by livestock with frequent human activities. Under the enclosure management, Mongolian agrograss + Melilotus clover was allocated to grassland, Mongolian agrograss + alfalfa was allocated to grassland, and brome without awning + Melilotus clover was allocated to grassland. Wind erosion characteristics of brome sans brome + alfalfa were studied under six management modes. The results showed that: (1) The wind speed profiles of different grassland management methods showed basically the same pattern, which showed that the wind speed increased with the increase of height. The wind speed profiles of artificial grassland A and D showed an “S” shaped curve, while the wind speed profiles of the other four grassland management methods showed A “J” shaped curve. (2) The relationship between the wind speed and the height from the ground was an exponential function, and the correlation coefficients R2 of the fitting equations of the wind speed and the height from the ground were all above 0.95. The fitting degree of the two equations was good, and the measured results matched well with the fitting equations. (3) The surface roughness of human-managed grassland A was the highest, and its average roughness was 61.84%, 117.01%, 3.71%, 65.68% and 315.03% higher than that of the other five types of grassland, respectively. The surface roughness of human-managed grassland was significantly higher than that of grazing grassland, which was helpful to improve the grassland surface roughness. Then the erosion of surface soil reduced by the process of sand flow.
Biodegradation of Microplastics in Soil
Authors: Yu Yanni , Luan Yaning , Dai Wei
Published: September 2022

Recently, microplastic pollution has become an environmental issue with widespread concern. As a bigger reservoir of microplastics than the ocean, microplastic pollution borne by soil has an impact on its structure and properties that cannot be ignored. Furthermore, with the help of plants, soil animals and microorganisms, this emerging pollutant will eventually threaten human health. Microplastics are difficult to recycle due to their small particle size, making it hard for traditional methods of plastic pollution management to work. In contrast, biodegradation methods are gaining attention because of its environmental sustainability and wide treatment range. This paper reviews the most popular microplastic biodegradation methods and their influencing factors, aiming to provide ideas and references for the biodegradation of microplastics.
Determination of Five Isothiazolinone Preservatives in Liquid Detergents by High Performance Liquid Chromatography
Authors: He Xiaoling , Ma Yan , Lu Jiali , Long Mei , Deng Xing , Zhang Nian
Published: September 2022

In this study, an associate analytical approach supported by high performance liquid chromatography (HPLC) was developed to analyze five isothiazolinones in liquid detergents in the meanwhile. The isothiazolinones were extracted from liquid detergents by ultrasound with methanol as the extraction solvent and analyzed by HPLC. The gradient elution procedure uses acetonitrile-water as the mobile phase. The isothiazolinones were effectively separated by Agilent ZORBAX SB-C18 column (4.6 mm × 250 mm, 5 µm), and detected by diode array detector. The maximum absorption detection wavelengths of MIT, CMIT, OIT, DCOIT, and BIT were 275 nm, 275 nm, 282 nm, 285 nm, and 318 nm, severally. Quantitative analysis use of external standard method. The method was illustrated the excellent linearity with the standard curve correlation coefficients of determination (R2, 0.9992–1.0), LOD ranged from 0.06–0.19 µg/g. The spiked recoveries were 92.73%–109.92% with the RSD (n = 7) varied from 0.06%–2.26%. A total of 30 liquid detergents samples were inspected, the results demonstrated that MIT, CMIT, and BIT were contained with the concentration varied from 4.26 µg/g to 102.62 µg/g. And, it described the matrix effects of liquid detergents. Conclusion this method was recognized by excellent linearity, precision, accuracy, and was validated as a suitable and reliable technique for determination of isothiazolinone preservatives in liquid detergents.
Evaluation on the Implementation Effect of the River Chief System in the Shiyang River Basin
Authors: Yao Bin , Liu Caixia , Sun Dongyuan , Jing Lingyun , Wang Xinfan , Wu Lanzhen
Published: September 2022

The evaluation of the implementation effect of the river chief system is the basis for the construction of good ecological environment to promote the management of rivers. This article conducted a study to evaluate the implementation effect of the river chief system in the Shiyang River Basin. The indicator system of the comprehensive evaluation of the implementation effect of the river chief system in the Shiyang River basin was constructed based on the fuzzy analytic hierarchy process model, including six levels and 34 evaluation indicators, and the implementation effect evaluated using the fuzzy comprehensive evaluation model. Research found that the comprehensive water resource management was the key factor in the implementation of the river chief system. The comprehensive evaluation grade of the implementation effect of the river chief system in the Shiyang River basin was grade III, which is modest. Of the six levels, the water ecological restoration effect was the most obvious, reaching grade I. The implementation effect of the river basin water administrative law enforcement and supervision was grade II. The effects of water resource management, water area shoreline management and water environment treatment effect were all grade III and that of water pollution control was poor with the grade of IV. The study proposed that the river chief system in the Shiyang River basin should fucus on the control of the water pollution by strengthening the management of the water resources and the water shores to improve the river basin water environment.
Systematic Treatment of Water Ecological Environment in Plain River Network City: A Case Study of Jiangyin
Authors: Ding Zhiliang , Hu Zichen , Sun Lingkai , Wu Conglin , Luo Kun
Published: September 2022

Jiangyin is a typical plain river network city in the Yangtze River Delta. The water ecological environment in urban area faces a range of environmental challenges, including poor water quality, black and odorous water bodies, serious isolation of river network, degradation of water ecological environment and low efficiency in urban wastewater treatment. This study proposed a systematic treatment plan which includes source sewage control, river regulation, water cycle enhancement, water environment restoration and waterscape improvement. Such an approach was informed by four principles, which is prioritizing pollutant control, introducing flowing water, co-management of river and bank, and combination of construction and management. By implementing such measures, the water environment carrying capacity and water ecological restoration capacity of the urban area have been greatly improved, and the overall water ecological environment quality has been significantly improved. The urban water system has realized a new picture of smooth river, clear water, green bank and beautiful scenery.
Low Oil-Water Ratio Technology in Water-In-Oil Drilling Fluids for Cost Reduce of Unconventional Oil and Gas Drilling Fluids
Authors: Pu Lei , Xu Mingbiao , Xu Peng
Published: September 2022

In China’s unconventional oil drilling, horizontal wells are one of the main forms of drilling, water-in-oil drilling fluid have been widely used due to their stable performance and excellent lubricating properties. To reduce the high cost of water-in-oil drilling fluids at the drilling site, further reduce the pressure of cuttings processing, and meet the requirements of environmental protection, an oil-based drilling fluid system with a low oil-water ratio was developed. Based on the research of key emulsifiers and the introduction of nanomaterials, it helps the drilling fluid system maintain the performance of the drilling fluid while increasing the water-phase ratio, and further enhances the fluid loss performance of the drilling fluid. The developed low oil-water ratio oil-based drilling fluid has been applied in the horizontal section of Jiaoye 5-3HF and Jiaoye 21-S2HF, two wells in the Fuling shale gas block in China, and successfully drilled to the designed well depth. The Marsh funnel viscosity of the drilling fluid is controlled from 63s to 78s, the plastic viscosity is lower than 40 mPa·s, the dynamic shear force is maintained at 3.5–7 pa, the high temperature and high pressure water loss is controlled below 2.6 ml, and the demulsification voltage is stable above 600v; the properties of the drilling fluid Excellent, meeting the requirements of on-site drilling construction. Compared with the conventional oil-water ratio system, the oil-based drilling fluid system with low oil-water ratio can greatly reduce the oil content, which can meet the requirements of on-site drilling and save the cost of oil-based drilling fluid to a large extent. It can reduce the pressure of environmental protection to a certain extent.
Research on Chemical Types and Genetic Mechanism of Groundwater in Yiluo Basin
Authors: Lu Xiaohui , Hu Yushu , Cui Mingxuan
Published: September 2022

Groundwater and its geological functions are closely related to human life and economic construction. The quality of groundwater is of great significance for maintaining the development of the national economy and the daily life of residents in the region. Understanding the chemical characteristics and genesis mechanism of groundwater in a certain area is helpful to provide important basis for the sustainable development of groundwater resources in this area. This study is mainly aimed at the Yiluo Basin, a piedmont basin in the western part of Henan Province. According to the chemical composition of shallow groundwater, the study area was systematically analyzed by using ionic scale coefficient, Piper three-line diagram, Kriging interpolation method and Shukarev classification. Finally, the hydrogeochemical simulation software PHREEQC was used to study the reverse hydrogeochemical simulation of fluoride ions in groundwater, and the simulation results were analyzed and discussed, revealing the existence state of ions in shallow groundwater.
A New Numerical Method for the Construction of Fracture-Pore Dual Media
Authors: Tian Xu , Song Gang , He Jun
Published: September 2022

Fracture-pore dual media plays an important role in soil and groundwater environmental protection. A new numerical method is developed to construct the fracture-pore dual media in this paper. In this method, the random fracture network with self-affine rough characteristic and the random porous medium with Berlin noise characteristic are constructed respectively, then the rough random fracture network and the random porous medium are superimposed to construct the fracture- pore dual medium. The construction of dual media is of great significance to the numerical simulation research in soil and groundwater environmental protection.
Green and Low-Carbon Transition Standardization in the Oil and Gas Industry
Authors: Li Yanhua , Shao Nan , Xu Xiaofeng , Lyv Hua , Wang Wei , Chen Xinyi , Zhang Hua , Qin Changyi
Published: September 2022

Green and low-carbon transition is one of the most important developments for the oil and gas industry. It is of great significance to the realization of carbon peak and carbon neutrality in the energy sector, and it plays very important role in addressing global climate change issues and the realization of sustainable social and economic development. The paper studies the current standardization situation of the green and low-carbon transition in oil and gas industry worldwide, analyzes the standardization difference and prospects the standardization development. The study provides a useful reference for the green and low-carbon practice and standardization of oil and gas industry.
Research and Application of Tube Mold in Bloom Continuous Casting for Rail Steel
Authors: Li Hongguang , Chen Liang , Yang Wenzhong , Chen Tianming
Published: September 2022

Research on the key parameters of tube mold for rail steel bloom was carried out in this paper, the effects of cooling water on bloom quality was studied, the effects of tube mold on magnetic intensity of electro-magnetic-stirring was analyzed, the shielding effect of tube mold on stirring intensity was represented by comparing solidification structure, suitable stirring parameters was confirmed; the effects of tubular corner size on cooling of bloom corner was analyzed by taken simulate calculate, and explore the effects of taper on the casting amount of steel by carried out experiment, parameters have been worked out and quality of bloom corner have been improved at last, convex hull of corner have been eliminated and zero defect for corner was realized, mean squared error of segregation degree at corner and solidified shell is not more than 0.010, better than combined mold remarkably.
Analysis of Solidification Crack in ERNiCr-3 Nickel-Base Filled Welding Metal
Authors: Chen Zhongbing , Shang Jianlu , Zhou Long , Tang Chunpo , Sun Zhiqiang , Yin Shaohua
Published: September 2022

Through the observation of microstructure and crack morphology, the crack properties and causes of F92/Super304H dissimilar steel welding joint filled with ERNiCr-3 wire was analyzed. Results show the crack was distributed along the crystal and located between dendrites or subcrystals in the center or near the center of the 4th and 5th weld layers. Both dendrites with consistent direction and crystal cells formed on the free solidification surface can be observed on the crack surface. The crack can be identified as welding solidification crack because of its typical morphological characteristics of weld metal solidification crack. The reason for the crack was the weld width of the 4th and 5th layers with 16 ∼ 21mm and one weld bead for each layer. The wide weld bead caused the weld metal to stay at high temperature for a long time, and the weld metal generated coarse and developed dendrites with consistent direction. Elements such as Ni, Nb, Si and Ti have segregated between dendrites or subcrystals to form low melting point eutectic such as Ni-Nb and Ni-Si. Cracks were generated along dendrite grain boundaries or subcrystals because of the effect of solidification shrinkage strain. The inherent solidification crack sensitivity of nickel-based welding material and the factors of welding process were the main reasons for the crack.
In-Situ Formation Fe2Al5 Intermetallic-Reinforced Aluminum Matrix Composite by Annealing Treatment of Cold-Sprayed Precursor Deposit
Authors: Zhu Guangguang , Wang Hongtao , Wang Ruoyu , Zhang Wangnian , Bai Xiaobo , Ji Gangghang
Published: September 2022

Aluminum matrix composite (AMC) reinforced with in-situ Fe2Al5 intermetallics particles was prepared through annealing treatment of the cold-sprayed Al/Fe composite precursor with an Al/Fe weight ratio of 85:15. The deformation characteristics of Al and Fe particles in cold spraying process and the effect of heat treatment temperature on the in-situ Fe2Al5 intermetallics formation and the morphology evolution were investigated. The results showed that the cold-sprayed Al/Fe composite deposit had a dense microstructure and its composition was nearly same as that of original powder mixture, and soft Al particles exhibited the significantly intensive deformation compared to Fe particles, which caused the elongation of Al grains. The Fe2Al5 intermetallics were formed and uniformly dispersed in the Al matrix after annealing at 500°C. The content of Fe2Al5 phase increased with raising annealing temperature and Fe particles in Al/Fe composite were fully consumed by diffusion alloying reaction with Al matrix above 550°C and simultaneously the fragmentation of Fe2Al5 intermetallics particles occurred.
Simulation Analysis of Cracking Process of Asphalt Concrete Beam Specimen Based on Cohesive Zone Model and Extended Finite Element
Authors: Liao Chenxi , Hong Xuan , Tian Xiaoge , Lu Xuerong , Li Guangyao
Published: September 2022

In order to simulate and analyze the cracking process of asphalt concrete beam specimens under loading, the elastic modulus, cracking strength and fracture energy of asphalt concrete were measured through direct tensile test and three-point bending test. Then, the Cohesive zone model (CZM) and extended finite element method (XFEM) were utilized to simulate the crack propagation process of the specimen under three-point bending loading, and the numerical simulation results were compared and analyzed. The results show that the crack propagation process can be well simulated by using the XFEM and CZM. During the cracking process, the propagation angle was related to the crack position, and the release rate of damage dissipation energy reflected the crack propagation rate.
Design Technology of Aircraft Full Elastic Model Based on Multiple Materials
Authors: Hou Yingyu , Ma Xin , Liu Ziqiang
Published: September 2022

This paper introduces the design requirements and design methods of structural materials in the process of aircraft model design, and introduces the shortcomings of traditional methods in this kind of structural design. Based on this, a full elastic model design method combining metal and composite materials is established. This method has the characteristics of accurate and fast design and simple structure. In order to verify the effectiveness of this method, this paper lists two related aircraft model structure design schemes, and introduces the design process and design results. The experimental results show that the above method can effectively complete the aircraft full elastic model design, the model design is accurate, and can meet the needs of aircraft simulation.
Influence of Inner Ring Roundness Deviation on the Dynamic Characteristics of Cylindrical Roller Bearing
Authors: Yan Jingxiang , Zhu Guangxu , Pei Ning , Wen Baogang , Wang Meiling
Published: September 2022

The difference between the maximum and minimum deviation of the actual contour relative to the ideal circle is roundness deviation caused by uneven temperature and wear of the ring during production and operation, which will lead to abnormal force. In this paper, a rigid flexible coupling dynamic model of cylindrical roller bearing considering the roundness deviation of inner ring is established to study the dynamic characteristics of bearing. And the dynamic characteristics of stress and contact force of raceway or cage under different roundness parameters are studied. It is concluded that the stress, contact force and trajectory of the inner ring are largely influenced by its roundness deviation. The stress and contact force will rise with the increasing of the deviation. Meanwhile, the displacement amplitude increases and the trajectory of the inner ring gradually tends to be irregular shape. The force on the cage will be increased due to the existence of roundness deviation, but the degree of deviation has little effect on the dynamics of the cage.
Asynchronous Longitudinal Vibration of the Wheelset System
Authors: Sun Linping , Yang Zhongliang , Ma Weihua , Luo Shihui , Wang Bo
Published: September 2022

The longitudinal flutter of the wheelset system has caused abnormal wear of the wheel-rail and stripping of the tread surface, resulting in complex dynamic problems of the locomotive. And asynchronous longitudinal vibration of the wheelset could bring about different wear problems of the left and right wheels when the wheelset system was in some non-ideal working conditions. The longitudinal vibration model of the wheelset considering the effect of bending moment is established to obtain the equivalent force, which can carry out the vibration response simulation analysis of the left and right wheels , meanwhile, the irrational influencing factors are discussed. The results show that the system is stable when the creep rates of the left and right wheels are lower than the critical creep rate, otherwise, it will produce self-excited vibration. The analysis of the influencing factors of self-excited vibration indicate that the larger displacement of the center of mass of the wheelset will lead to the larger dynamic load in the system, increasing the vibration amplitude of the wheel on the offset side. And the vibration amplitude and velocity of the one with smaller primary longitudinal stiffness will increase, while the other one wheel will decrease. However, the wheel eccentric load is almost no effect on the longitudinal vibration amplitude.
One-Dimensional High-Order Dynamic Model of U-Shaped Thin-Wall Arm Segment of Telescopic Boom of Crane
Authors: Wang Hui , Zhang Lei , Liang Shilei , Wang Yanyan , Zhu Weidong
Published: September 2022

In order to accurately analyse the dynamic performance of the arm segment, a dynamic model of u-shaped thin-walled beam based on one-dimensional high-order beam theory is proposed to predict the three-dimensional displacement of the beam at any point. First, a one-dimensional high-order model is established using Hamilton’s principle. The high-order model considers the displacement field by linear superposition of a set of basis functions that vary axially along the beam. A basis function represents a deformation mode, and interpolation polynomials are used to approximate the three-dimensional displacements of nodes on the center line of the section. At the same time, different section discretization methods are analysed, which have different influences on the precision of the model by discretization of the curved surface part of u-shaped section by straight transposition. Finally, the generalized characteristic of the model is worth to obtain the natural frequency, which is compared with the ANASYS plate and shell theory. The error range of the first 16 orders is within 1.5%. The results show that the discrete mode of the model has a certain influence on the frequency error, and the more discrete nodes of the circular arc part, the higher the accuracy.
Analysis on the Stability of 1000MW Ultra-Supercritical N+1 Shafting
Authors: Zhang Kai , Li Libo
Published: September 2022

With the development of power generation equipment manufacturing technology, the parameters of thermal power units are constantly improving, and the capacity is also developing towards large-scale, followed by the gradual increase of unconventional vibration faults. The critical speed, unbalance response, logarithmic decay rate, instability speed and Q factor of N 1 shafting are analyzed in detail. The results show that the stability of the shafting meets the requirementsThis paper calculates and analyzes the stability of the N+1 shaft system of a 1000MW ultra-supercritical steam turbine generator set in a plant, and analyzes various vibration problems during the start-up and constant speed of the unit. Shafting stability calculation of various types of units and analysis and processing of vibration problems provide reference and reference.
Temperature Performance and Calibration of Torque Sensor
Authors: Qin Haifeng , Wang Xueqin , Qin Lemeng
Published: September 2022

Torque sensors are widely used in the field of industrial machinery, they are an important guarantee for the control accuracy of material torsion test equipment. The working environment of torque sensor application site is complex, which is often different from that of calibration in the laboratory. Based on its measurement principle, the metering performance of torque sensor will be different under different Temperature conditions. In this paper, the performance differences of common strain torque sensors under different environmental conditions are analyzed, and the temperature performance evaluation method are introduced. The structure and performance of torque standard machine and thermal insulation coupling which can be used for temperature test, as well as a series of calibration tests and results carried out by using this device.
Researches on Coordinated Control Strategy of Household Microgrid Based on Distributed Energy
Authors: Zhang Liang , Chen Yuchun , Liu Yuhang , Xu Zhiguang , Wang Chao
Published: September 2022

The household microgrid has become an important part of the power system due to its adjustability as a result of the continuous improvement of clean energy production and consumption electrification. The purpose of the paper is researching the path to promote coordinated control of household microgrid based on distributed energy. Firstly, the model characteristics of the loads at the household microgrid are analyzed. Secondly, the coordinated control system of household microgrid is constructed by considering the regulation requirements of multiple loads. Thirdly, energy-saving strategies and cost-saving strategies are proposed. Finally, the calculation results of a residential district with 336 households in Tianjin show that the energy-saving rate is 15.34% after coordinated control optimization.
A Blockchain-Based Performance Monitoring Platform for Polar Oil and Gas Exploration Sensors
Authors: Guo Shiman , Yu Xiang , Yang Shu , Zhang Mengxi , Yue Yixin , Wang Jiayin , Fu Chenxiu
Published: September 2022

Polar oil and gas exploration has been thrusted into the limelight in Chinese oil and gas exploration since the issuance of the white paper China’s Arctic Policy. With the upgrading of oil and gas exploration equipment suitable for polar regions, the coating technology applicable to exploration equipment has drawn an increasing attention. In view of few literatures available for coating job security, this paper attempts to utilize blockchain technology to fulfill remote monitoring, proactive maintenance, and instant traceability of sensor performances for polar oil and gas exploration.
Institucionalismo, desenvolvimentismo e a economia brasileira
Authors: Pereira Adriano José , Castiglioni Lopes Herton , Camargo Conceição Octavio Augusto
Published: September 2022

Este livro aborda, de forma articulada, duas perspectivas consideradas fundamentais para o debate acerca de uma reflexão contemporânea sobre estratégias de desenvolvimento de economias não desenvolvidas, como a brasileira. A compreensão do papel das instituições ganha uma dimensão ampliada quando se considera a perspectiva desenvolvimentista para a análise do desenvolvimento econômico nacional. No caso brasileiro, institucionalismo e desenvolvimentismo são partes de uma mesma perspectiva de desenvolvimento, que vem ganhando novas interpretações e espaços para reflexão nessas primeiras décadas do século XXI.
The Influence of Music Education on the Academic Behavior for Preschool Children with Autism
Authors: Lee Liza , Lin Hsiao-Fang , Ho Han-Ju
Published: September 2022

This study combined the Holistic Music Educational Approach for Young Children (HMEAYC) and Figurenotes' music teaching methods. The venue was a nonprofit early intervention organization and private preschool. Purposive sampling was used to select six children with autism spectrum disorder (ASD) and six without ASD around the age of 40–63 months, and the course arrangement was a 40-minute class each week for 12 weeks. This study is based on ethical considerations, and all parents of children participating in the course fully understand and sign the informed consent. This study demonstrated that the Figurenotes teaching method could improve the learning habits and learning performance of without ASD children. In addition, the intervention of the HMEAYC teaching method can improve the academic behavior of both ASD and without ASD children, especially for ASD children, it has more significant benefits on learning habits.
Adaptation of pets to new living conditions
Authors: Lesnikova Dar'ya
Published: September 2022

The paper presents the results of studies of hematological parameters of dogs and cats when adapting to new living conditions. It was revealed that the change of residence for small pets causes a number of changes in the blood composition, which can be considered as a reaction to stress when adapting to new living conditions.
Türkiye’de Turizm Faaliyetlerini Belirleyen Makroekonomik Değişkenlerin Karşılaştırmalı Analizi
Authors: TÜTÜNCÜ Asiye
Published: September 2022

Turizm ülkelerin çeşitli göstergelerinden etkilenen ve çeşitli göstergelerini etkileyen bir faaliyettir. Bu bağlamda bu çalışmanın amacı Türkiye’nin turizm faaliyetlerini etkileyen makroekonomik değişkenlerin belirlenmesidir. Bu doğrultuda 1996:1–2016:1 dönemi Yapısal VAR Analizi ile Etki-Tepki Fonksiyonlarının yardımıyla incelenmiştir. Çalışmada kullanılan makroekonomik değişkenler literatür dikkate alınarak araştırılmış ve gelen uluslararası turist sayısı, reel kişi başına düşen milli gelir, tüketici fiyat endeksi, reel efektif döviz kuru, politik istikrar, jeopolitik risk indeksi ve kişi başına düşen karbondioksit miktarı şeklinde belirlenmiştir. Elde edilen bulgular, gelen uluslararası turist sayısının milli geliri, karbondioksit emisyonunu, politik istikrarı ve jeopolitik risk endeksini etkilediğini göstermektedir. Bunun yanı sıra ülkeye gelen uluslararası turist sayısının milli gelir, politik istikrar, karbondioksit emisyonu miktarından etkilendiği, jeopolitik risk endeksinden etkilenmediği tespit edilmiştir. Kısa dönemde enflasyon ve döviz kuru ile gelen uluslararası turist sayısı arasında istatistiksel olarak anlamlı bir ilişki tespit edilememiştir.
Pengaruh pelatihan, kompensasi, dan kepemimpinan terhadap kepuasan kinerja karyawan di PT PYI
Authors: Esa Pertiwi Dini , Pratminingsih SA.
Published: September 2022

This study aims to determine the effect of training, compensation, and leadership on employee performance at PT. PYI partially and simultaneously. This research was conducted with quantitative methods, with the method of selecting samples using simple random sampling. The number of samples in this study were 108 respondents. The data obtained were then processed using multiple linear regression analysis. The results showed that the variables of training, compensation, and leadership had a significant effect on employee performance, either partially or simultaneously. The implication that can be drawn from this research is that companies can improve the performance of their employees by increasing training, providing compensation, and making adjustments to their leadership style.
Pengaruh sistem pengendalian internal, sistem informasi akuntansi dan pemanfaatan teknologi informasi terhadap akuntabilitas pengelolaan dana kelurahan di Kecamatan Gubeng Kota Surabaya
Authors: Sakti Anggoro Putra Bima , Priono Hero
Published: September 2022

ICW data states that village heads are quite often entangled in corruption crimes, in 2016to 2017 there were 110 village heads and in 2018 there were 102 suspects. As for the internal problems of the Gubeng District, Surabaya City, namely the lack of performanceaccountability caused by lack of knowledge of the sub-district government in using accounting information systems. As a result, the sub-district government relies too muchon outsourcing in the use of its accounting information system. This study aims to obtainempirical evidence of the effect of internal control systems, accounting information systems, and the use of information technology on the accountability of village fund management. The objects in this study are 6 (six) Kelurahan in Gubeng Subdistrict, Surabaya City with several employees who can be used as respondents as many as 30 employees. The analysis technique for this research uses a smart Partial Least Square (PLS) 3.0 tool. Based on data analysis, it was found that the internal control system andaccounting information system had a statistically positive and significant effect on the accountability of village fund management, while the use of information technology hadno statistically significant effect on the accountability of village fund management.
Analisis swot untuk menentukan strategi bersaing saat masa pandemi covid-19 pada rumah sakit islam surabaya
Authors: Elvana Yesia , Hariyati Hariyati , Setianto Budhi
Published: September 2022

This study has a goal, namely to find out the right competitive strategy using SWOT analysis at the Surabaya Islamic Hospital so that its business can be even better, able to attract interest and give trust to the public regarding the health services it has, can measure and determine the right management at the Surabaya Islamic Hospital so that it can encourage business progress in the face of increasingly fierce competition even during the Covid-19 pandemic. The type of research used is descriptive qualitative. The data analysis technique in this research is SWOT (Strength, Weakness, Opportunity, Threat) analysis. The results of the study showed that in the Internal Factors Analysis Summary (IFAS) the total score for the strength factor was 5.89, and the weakness was 2.47, then in the External Factors Analysis Summary (EFAS) the total score for the opportunity was 4.46, and the threat was 4. ,20. From these results, the SWOT diagram at the Surabaya Islamic Hospital is in quadrant I (one), namely the aggressive and supportive strategy using the SO (Strength-Opportunity) strategy.
Perencanaan strategi bisnis rumah sakit ibu & anak pada rumah sakit ibu & anak swasta XYZ
Authors: Yuniarto Aditya , Zulkifli Zulkifli , Derriawan Derriawan
Published: September 2022

This study focuses on how to plan a hospital's business strategy and use RSIA XYZ as a case study for a Class C private hospital. The purpose of this research is to prepare a business strategy plan for the next 5 years for RSIA XYZ. measure the success of the company's performance. This research is a qualitative research using a quantitative approach, with a descriptive question and answer analysis approach, about the strategic planning of the XYZ Hospital business from 2020 to 2024. The results show that the XYZ Hospital business strategy plan refers to the strategy in the analysis results that have been carried out. carried out, and choose the right strategy for XYZ Hospital to further formulate work plans and programs. Not only until the next work plan, but also key performance indicators (KPI) related to strategic targets will be prepared every year