bluuebunny/crossref_metadata_2025_split huggingface dataset:
A study on the spatial construction strategies of ethnic minority villages based on compound ecosystem theory
Authors: Shao Dandan , Han Rong 
Published: July 2020

Abstract
This article selects minority villages as the research object. The socio-economic-natural complex ecosystem theory is applied to the spatial construction of ethnic minority villages, and the landscape ecology and ecological aesthetics are combined to study the landscape planning of ethnic villages. Based on the rural realities, the problems, structures, features, and functions in the landscape planning of ethnic villages are analyzed from three levels: the natural ecological subsystem, the economic ecological subsystem, and the social ecological subsystem. The guiding thoughts, principles, and methods of the landscape planning of ethnic villages are put forward, and the relationship between the spatial planning of ethnic villages and the shaping of ethnic characteristics is summarized through the interpretation of related concepts and the analysis of research status at home and abroad. Finally, a strategy for the spatial construction of ethnic villages was obtained with a view to providing theoretical basis and reference for future national village landscape planning.
Time and Space Evolution Law of Surrounding Rock Deformation under the Influence of Mining
Authors: chen Lei , Zhang Haolin , Kang Jiayan , Jia Guilong 
Published: July 2020

Abstract
Under the influence of mining, the stress of the surrounding rock of the roadway is redistributed, and the surrounding rock of the roadway is deformed. In order to study the change rule of surrounding rock deformation with the advancing process of working face under the influence of mining, according to the field measurement results, the mechanical model of supporting pressure of advance working face and deformation of roadway top is established, and the change rule of time and space is analysed by numerical simulation. The results show that: in different stages of working face pressure, the advance bearing pressure presents different regularity. The peak value of bearing pressure and stress concentration coefficient are the largest when the pressure is applied for the first time, the minimum when the pressure is not applied, and the influence range of bearing pressure is not affected by the period of pressure.
Comprehensive benefit analysis of reinforced concrete bridge under different axle load limits
Authors: He Yulong , Jiang Tianlin , Liu Hua , Li Ao , Wang Tao 
Published: July 2020

Abstract
Limiting the vehicle load crossing the bridge can improve the safety of the bridge, but the transportation efficiency might be reduced. In order to reasonably evaluate the comprehensive impact of vehicle load limit on bridges, a comprehensive benefit evaluation factor K was defined to analyze the comprehensive benefits of highway bridge transportation under different axle load limits. Firstly, based on WIM data, the random distribution function of total vehicle weight and axle load was fitted, and the loss ratio of transportation benefit before and after limiting the axle load was defined and calculated based on the principle of invariable total vehicle weight. Combined with the random distribution function of the total weight and axle load, Monte-Carlo method was used to simulate the random traffic flow under different load limit levels and calculate the time-varying reliability of typical bridges under different load limit levels. Finally, the evaluation factor K was introduced to evaluate the influence of axle load limit on the comprehensive benefit of highway reinforced cocrete bridges, and reasonable axle load limit suggestions were put forward.
Study on the axial stress of angle steel components of transmission tower
Authors: Yu Xinmin , Fu Benzhao , Xie Ming 
Published: July 2020

Abstract
Taking the common specifications of the transmission tower as equal angle steel as the research object, for the angle steel of different specifications, based on the theory of equal strength, the critical slenderness ratio and the critical calculated length of each angle steel under the arrangement of parallel axis and minimum axis and Q345 and Q420 materials The critical slenderness ratio and critical calculated length of each angle steel under the minimum axis arrangement, and by simplifying the economic index, comparing the stability coefficient and stable bearing capacity of the angle steel under the same conditions, analyzing the economics of the angle steel, and finally proposing In the design of the line pole tower, the method of selecting angle steel reasonably.
Study on calculation method of auxiliary materials for transmission tower
Authors: Fu Benzhao , Yu Xinmin , Xie Ming 
Published: July 2020

Abstract
Comparing the provisions of domestic and foreign codes on the supporting force of auxiliary materials, the major domestic design institutes used design software, combined with the test results of the 220kV double-circuit linear tower (SZ801) true-type test, and concluded that compared with “Standard for design of steel structures”, “Design of latticed steel transmission structures “and the test results, the value of the internal force of the auxiliary materials of “Technical code for the design of tower and pole structures of overhead transmission line “is conservative. The value of the internal force of auxiliary materials supported by “Industry standards” only considers the influence of the main and inclined materials, and does not consider the effect of different equal distribution methods on the value.
Mechanical analysis of ribbed floor using continuum model
Authors: Zhu Jiejiang , Zhou Bolun 
Published: July 2020

Abstract
An approximate method based on a continuum model is proposed for analysis of floor system. A continuum model equivalent to the original ribbed floor is derived and the theoretical analytical solution of the deflection and force of the floor system is calculated. The calculation of rectangular slab whose size is 8m and 6m is carried out in the paper. Finite element analysis program SAP2000 is used for structural calculation to verify the correctness of the sample. The continuum method can result in considerable simplicity in computation analysis and provide a basis for subsequent optimization design.
Seismic finite element analysis of tailings dam in high seismic intensity area
Authors: Zhao Chongxu , Yao Lunqiang , Hou Shichao , Zhu Yantao , Gu Hao , Li Bo 
Published: July 2020

Abstract
As an important facility for mine exploitation, the safety of tailings dam is very important in high seismic intensity area. In this paper, the seismic stability analysis of tailings dam located in high intensity area was carried out by taking the example of one tailings dam. Three-dimensional finite element model was established, and the calculation results were analyzed and compared under fixed boundary condition and viscous spring boundary condition. The results showed that, (1) Under the static condition, the deformation value is distributed in layers from top to bottom. (2) Under the seismic condition, it can be seen that the Z direction deformation is the largest, followed by the X direction, and the Y direction deformation is the smallest. (3) It is too conservative to evaluate the seismic stability of dam slope with the minimum safety coefficient, while it is more practical to use the minimum average safety factor as the evaluation index.
The Status of Foreign Advanced Pasture Water Supply Technology
Authors: Wang Xingtian , Zhu Junfeng , Cao Liang , Wang Shifeng 
Published: July 2020

Abstract
Pasture water supply is of great significance for rational management of grassland, maintaining grassland ecological balance and promoting the development of animal husbandry. The investigation of international advanced pasture water supply technology has important reference value for the development of science, technology and economy in domestic pasture area. The advanced pasture water supply technology in the United States, Canada and Holland was summarized and analyzed through the literature retrieval with database. And the current situation of water supply technology in typical pastures of China was investigated and summarized through the field investigation of the Inner Mongolia pasture and the visit of the local herdsmen. The foreign pasture advanced water supply technology of Fresh Water Mill, batteryless photovoltaic water supply system, stand-alone mixed energy supply system, wireless data collection system of remote water supply system, automatic constant temperature water supply system and automatic water supply control system for pasture are put forward in accordance with the characteristics of pasture in China.
Impact of Slightly-Curved Riparian Vegetation Distribution on Hyporheic Lateral Exchange solute migration
Authors: Yu Genting , Zhou Xinyan , You Aiju , Xu Haibo , Hu Keke , Hu Lin 
Published: July 2020

Abstract
Riparian hyporheic exchange has a very important role in blocking and reducing pollution. In order to quantitatively grasp the self-purification ability of the river and predict the change of water quality, it is necessary to have a good understanding of the process that drives river water into the hyporheic layer. In this paper, the effects of slightly-curved riparian and vegetation density on the hyporheic lateral exchange of solute migration were studied in depth through model tests. The results show that: (1) The vegetation spacing d has a significant effect on the hyporheic lateral exchange. As the lateral spacing of vegetation decreases, the rate of hyporheic lateral exchange increases. (2) The amplitude a has a significant effect on the hyporheic lateral exchange. As the amplitude a increases, the faster the hyporheic lateral exchange rate on convex surface, and the larger the feather forward area of solute migration. However, due to the expansion of the volume of the retention area on the concave surface, it has a suppressive effect on the disturbance pressure and delays the solute transport. (3) There is a certain asymptotic limit for the increase of the hyporheic lateral exchange width, when the ratio of the underground pore water concentration C′ to the surface circulating water concentration C0′in the riparian zone is equal to 0.50, the solute transport width can be approximated as a suitable width for the hyporheic lateral exchange. The results are expected to provide a certain reference for the theoretical research of riparian hyporheic exchange.
On Building a Green Credit System for Marine Environment Protection
Authors: Wei Yang , Hao Kong 
Published: July 2020

Abstract
On August 31, 2016, the People’s Bank of China (PBC), along with six other government agencies, issued the Guidelines for Establishing the Green Financial System, introducing a series of measures to support and encourage green investment and financing. On September 2, the China Banking Regulatory Commission (CBRC) proposed a framework for building a green credit system and comprehensive evaluation of green credit, which lays out the development direction for green lending. Learning from international and domestic research and practical experiences, this paper tries to develop a green credit system for marine environmental protection. Based on the current green credit theory and policy trend, this thesis sets the operating mechanism for green credit, which can enforce contact and cooperation between marine environmental protection departments and financial regulators. All of these can promote enterprises and individual polluters to pay attention to marine environment, strengthen pollution control and maintain ecosystem healthy.
Seismic landslide susceptibility assessment based on ADASYN-LDA model
Authors: Zhang Shuhao , Yu Peiqiao 
Published: July 2020

AbstractSeismic landslide susceptibility (SLS) assessment can be used to estimate the susceptibility of landslides induced by an earthquake, which has great significance for emergency measure making and land use planning to mitigate the landslide hazard and risk. At present, one of the key problems in SLS evaluation is that the sample is extremely unbalanced, that is, the number of landslide units is usually far less than that of non-landslide units, which easily leads to poor prediction performance of SLS model. In addition, when using high-resolution mapping units, the sample size greatly increases, and thus the training time cost is considerable especially for complicated nonlinear artificial intelligence such as the Support Vector Machine and the Neural Networks. In view of this, this paper proposes an SLS model (called ADASYN-LDA) combining ADASYN sample method and linear discriminant analysis (LDA), and evaluates it using 2014 Ludian earthquake event. The results show that the two ADASYN-LDA models are highly efficient in training, and have good prediction performance with the high AUC of 0.8737 and 0.8535 respectively, and with the balanced accuracy of 0.7950 and 0.6174 respectively. Compared with the traditional LDA model without ADASYN method, ADASYN-LDA model improves the results of the SLS assessment affected by the sample imbalance. The further evaluation is needed in other earthquake events, and the further improvement can be made with more landslide conditioning factors and seismic landslide data set.
Numerical investigation of bolt anchorage with tension force and shear force
Authors: Chen Yu , Li Yongde 
Published: July 2020

Abstract
The bolt anchorage with tension force and shear force are studied numerically by FLAC3D modelling. A tri-linear material model was utilized for the bolt steels in order to simulate the strain hardening behaviour of the materials. The numerical modelling show that different types of bolts have similar load capacities, while their deformation capacities are different. The numerical results match the laboratory test results. The different deformation capacities of rock bolts are attributed to their different bonding conditions and stretching lengths. The axial load in the rebar bolt reduces exponentially from the loading point close to the joint to the bolt end. The axial load in the D-Bolt has its maximum at the joint and reduces slowly as the distance from the joint increases.
Research on speed regulation system of water turbine generator unit based on PID neural network
Authors: Yu Ping , Yu Yue , Ren Zhiqiang , Wu Congbing , Xu Yubao 
Published: July 2020

Abstract
For the water turbine generator unit speed control system control error is large, long adjustment time, low control accuracy, poor stability and other problems, the PID neural network speed control strategy is proposed. First of all, the PID neural network (PIDNN) is used to design the speed control system of the turbine generator unit, and a complete model of the turbine generator unit speed control system is established. Secondly, using MATLAB for simulation, the step response of the water turbine generator unit speed control system is obtained. Finally, compared with the traditional PID controller, the PID neural network controller has obvious advantages in controlling error, adjusting time, over-tuning inhibition, etc., and has good stability.
Water Resources Carrying Capacity Assessment in Dali Prefecture Based on T-S Fuzzy Neural Network Model
Authors: Chen Jinming , Gu Shixiang , Chen Gang , Du Xuanxuan , Hong Jinshu 
Published: July 2020

Abstract
Water resources carrying capacity (WRCC) assessment is an effective way to evaluate the coordinated development of water resources, economic society and ecological environment, thus, it is significant to study WRCC to realize the harmony among water resources, economy and society in region. In this paper, an index system for evaluating WRCC, which represents the natural attributes and the managerial attributes of water resource, was constructed. Moreover, the T-S Fuzzy Neural Network Model was applied to evaluate WRCC of resource-oriented, management-oriented and comprehensive in Dali Prefecture, respectively. The results showed that evaluation results of WRCC of resource-oriented, management-oriented and comprehensive were different from each other obviously. Evaluation results of comprehensive WRCC accords with the fact. The WRCC in research region was averaged overall. WRCC in Heqing county, Eryuan county, Yangbi county, Dali city, Binchuan county, Xiangyun county and north of Midu county and Weishan county was already in a critical status, but that in the other area of Dali Prefecture was in non-overloading status.
Study on the Method of Solving the P-III Curve Fitted by Precipitation Frequency Based on Excel
Authors: Liu Hongliang , Li Shanhai , Qin Peng 
Published: July 2020

Abstract
The built-in function of Excel was used to calculate the precipitation frequency, the least square method was used to fit the appropriate line, the statistical parameters of hydrological variables were optimized, and the charting function was used to draw the precipitation frequency curve to meet the requirements of production practice.
Analysis on Mechanism to Improve the Recovery in Tight Oil Reservoirs by Imbibition
Authors: Chunming He , Jin Chen , Xiaochao Wang , Shuai Li , Ning Cheng , hui Zhang 
Published: July 2020

Abstract
In order to explore the mechanism to improve the recovery percent in tight oil reservoirs, the mechanisms and main controlling factors of improving the recovery percent by different production mechanisms are analyzed by combining spontaneous imbibition, core displacement experiment and nuclear magnetic resonance (NMR) test. It is shown by the study that the recovery percent can be improved from 20% to more than 40% by increasing the displacement differential pressure for tight rock samples. During differential pressure displacement, the reservoir fluid in large and medium pores is mostly produced. It is proven by the pressured imbibition experiment that in the process of soaking, the fluid exchange between fractures and matrix and between large and small pores can be realized to improve the recovery percent of fine pores, and the recovery percent (mainly of fine pores) can be improved by 7-10% through pressured imbibition displacement. Large contact area caused by the complex fractures formed by stimulated reservoir volume (SRV) fracturing is the basis to improve the recovery percent by imbibition, but the recovery percent of simple fractures is limited. The research results of this paper will provide guidance for the stimulation technology and fluid system optimization to improve the recovery percent of tight oil.
A New Probe into the Evaluation indicator for the Suitability of Recharge Engineering
Authors: Changbing Song , Xiangdong Song 
Published: July 2020

Abstract
Recharge measures can effectively eliminate the potential environmental risks caused by the loss of groundwater. It is a commonly used groundwater control measure and is widely implemented nationwide. However, at present, there is no clear judgment method for whether certain projects are feasible to recharge. This article classifies and summarizes the evaluation indicators in terms of the necessity, feasibility and economy of recharging, and provides a basis for the decision of recharging projects.
Displacement analysis of open pipe piles sinking based on strain path method
Authors: Kaishun Zhang 
Published: July 2020

Abstract
The displacement field in the process of opening pipe piles sink has always been a hot issue in the study, especially in the area of pile, the soil body has produced a large strain, regardless of the large deformation effect of the soil, there will be a large calculation error. The strain path method can obtain the flow velocity of the soil because it does not rely on the constitutive relationship of the soil, which is a favorable theory for solving large strain problems. In this paper, the modified strain path method is used as the theoretical basis. The open pipe pile is equivalent to a closed pipe pile through the soil plug effect, and the sunk pile displacement of the open pipe pile is calculated to further reveal the soil plug effect and the soil squeeze effect of the open pipe pile mutual restraint and mutual influence, thus providing a theoretical basis for the pile displacement of open pipe piles.
Superposition Technology of Complex Giant Reinforced Concrete Beams
Authors: Cangjie He , Hu Huang , Lu Li , Jing Guo , Fengqi Gao 
Published: July 2020

Abstract
Superposition technology construction is widely used in Large-span structures, super high-rise structures and large drop concrete structures. Based on the construction process of reinforced concrete for deep foundation pit engineering in Changsha Ice and Snow World, Superposition technology and support design of large section concrete structures are discussed. ABAQUS finite element analysis was used to obtain the pouring process. It provides the technical foundation for the future design and construction of complex giant reinforced concrete structures.
The evolution of cracks in red clay under wet and dry cycles and its influence on shear strength
Authors: Chen Kai-Sheng 
Published: July 2020

Abstract
Using computer image processing technology and lots of triaxial experiments, the fracture evolution rules and shear strength indexes of red clay in the wet and dry cycles were analyzed, and the functional relationship between shear strength indexes of red clay and fracture density was established. The parameters in slope stability calculation were also discussed by the strength indexes reduction method. The results show that with the increase of the times of dry and wet cycles, the crack density gradually increases and eventually it remains stable. During the first two wet and dry cycles, the crack development of red clay was the most obvious. After the dry-wet cycle, the stress-strain curve of the red clay is weakly hardened and the failure mode is bulging. The shear strength of red clay is significantly reduced by the influence of dry wet cycle. After the first cycle, the attenuation of strength indexes is obvious, and the final strength indexes trend to be stable. The attenuation amplitude of the cohesive force is significantly larger than the internal friction angle. After the wet-dry cycle, the stable value of its cohesion becomes 54% ∼ 57% of the initial value, and the stable value of the internal friction angle becomes 45% ∼ 63% of the initial value, so it is recommended to use the value of the long-term strength index and it is more accurate to calculate the slope stability under dry and wet cycles. Under the action of dry and wet cycles, a quadratic polynomial can be used to fit the functional connection between the crack density of red clay and the index of shear strength.
Grouting reinforcement treatment method for super-shallow buried metro station crossing sand layer
Authors: Bing Zhang , Shijie Zhang 
Published: July 2020

Abstract
The quaternary water-rich sand layer is often traversed during the construction of metro tunnels, and is one of the main geological disaster sources that affect the safety of metro construction. The grouting method is the most commonly used method to control the geological hazards of the water-rich sand layer. Affected by the pore structure of the sand layer and the state of in-situ stress, this paper proposes a method of grouting reinforcement with mould bag piles for sand grouting. Progressive section grouting can successfully solve the problem of sand layer reinforcement. The results show that: (1) The mould bag pile reinforcement can effectively strengthen the sand layer and ensure that the sand layer within the slurry diffusion range can be effectively strengthened, and increase the grouting retention rate; (2) Progressive section grouting can achieve the effect of grouting reinforcement at different depths to ensure the effect of grouting. This method has been successfully applied in metro station, hoping to provide some reference for similar projects.