scholarly journals The impact mechanism of rural land circulation on promoting rural revitalization based on wireless network development

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Ai-min Zheng ◽  
Zhong Li
Keyword(s):  
Wireless Network ◽  
Network Development ◽  
Rural Land ◽  
Impact Mechanism ◽  
Land Circulation ◽  
Rural Revitalization ◽  
The Impact

scholarly journals Will land circulation sway “grain orientation”? The impact of rural land circulation on farmers’ agricultural planting structures

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253158
Author(s):  
Jiquan Peng ◽  
Juan Chen ◽  
Chen Su ◽  
Zhifeng Wu ◽  
Liu Yang ◽  
...  
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Grain Orientation ◽  
Food Crops ◽  
Rural Land ◽  
Positive Effects ◽  
Land Circulation ◽  
Rate Of Increase ◽  
Structure Adjustment ◽  
The Impact

This study calculates the effect of different types of land circulation on farmers’ decision-making regarding agricultural planting structure, using field survey data involving 1,120 households in Hubei province, China, and PSM (propensity score matching) and GPSM (general propensity score matching) methods. Results from PSM showed that land circulation could significantly increase farmers’ decisions to plant food crops, which confirms the positive effect of rural land circulation on the “grain orientation” of crop planting structure. Results from GPSM further indicate that the total land circulation, the paddy land circulation, and the dry land circulation all have significantly positive effects on planting structure adjustment towards “grain orientation.” Additionally, planting structure adjustment towards “grain orientation” increases as the scale of land circulation increases, and the former shows a higher rate of increase than the latter, which confirms that rural land circulation facilitates an adjustment in structure towards planting food crops.

scholarly journals Impact Mechanism of the Ecological Vulnerability of Highly Developed Islands Based on the Bayesian Network Model—Applied to the Changshan Islands

2021 ◽  
Vol 18 (8) ◽  
pp. 4150
Author(s):  
Keyu Qin ◽  
Haijun Huang ◽  
Jingya Liu ◽  
Liwen Yan ◽  
Yanxia Liu ◽  
...  
Keyword(s):  
Bayesian Network ◽  
Network Model ◽  
Geographical Information ◽  
Global Changes ◽  
Bayesian Network Model ◽  
Island Ecosystems ◽  
Impact Mechanism ◽  
The North ◽  
Ecological Vulnerability ◽  
The Impact

Islands are one of the most sensitive interfaces between global changes and land and sea dynamic effects, with high sensitivity and low stability. Therefore, under the dynamic coupling effect of human activities and frequent natural disasters, the vulnerability of the ecological environment of islands shows the characteristics of complexity and diversity. For the protection of island ecosystems, a system for the assessment of island ecosystems and studies on the mechanism of island ecological vulnerability are highly crucial. In this study, the North and South Changshan Islands of China were selected as the study area. Considering various impact factors of island ecological vulnerability, the geographical information systems (GIS) spatial analysis, field surveys, data sampling were used to evaluate island ecological vulnerability. The Bayesian network model was used to explore the impact mechanism of ecological vulnerability. The results showed that the ecological vulnerability of the North Changshan Island is higher than that of the South Changshan Island. Among all the indicators, the proportion of net primary productivity (NPP) and the steep slope has the strongest correlation with ecological vulnerability. This study can be used as references in the relevant departments to formulate management policies and promote the sustainable development of islands and their surrounding waters

The Formation Mechanism of Equiaxed Crystals in Pure Aluminum Solidification Structure under the Al-Ti-C Master Alloy

2013 ◽  
Vol 668 ◽  
pp. 865-869
Author(s):  
Wan Wu Ding ◽  
Wen Jun Zhao ◽  
Tian Dong Xia
Keyword(s):  
Transition Zone ◽  
Formation Mechanism ◽  
Master Alloy ◽  
Heterogeneous Nucleation ◽  
Pure Aluminum ◽  
Solidification Structure ◽  
Impact Mechanism ◽  
Tic Particle ◽  
The Impact

The influence of different solidified velocities on the structure of pure aluminum during the process of refinement by Al-5Ti-0.6C master alloy was studied and the impact mechanism was discussed. The results show that at the same solidified velocity, with the increase of the amount of Al-5Ti-0.6C master alloy, in the solidified structure of pure aluminum, columnar crystals will gradually decrease, while equiaxed crystals will gradually increase. But in the case when the level of addition is the same, the faster the solidified velocity, the greater the number of equiaxed crystals will be in the ingot microstructure. The formation of equiaxed crystals is the result of the dual role of dissociation of crystal particles and heterogeneous nucleation of “TiC particle---Ti transition zone”.

scholarly journals The Impact Mechanism of Certification Body on ISO14001 Certification Effectiveness of Enterprise

2018 ◽  
Vol 170 ◽  
pp. 032058
Author(s):  
Yukun Fan ◽  
Gang Liu ◽  
Zhaoying Zuo ◽  
Xiangwei Yin ◽  
Bin Jia ◽  
...  
Keyword(s):  
Impact Mechanism ◽  
Certification Body ◽  
The Impact

scholarly journals The Analysis of Electrical Energy Consumption of the Impact Screwdriver During Assembly of Fixed Threaded Joints

2017 ◽  
Vol 54 (3) ◽  
pp. 50-57 ◽  
Author(s):  
I. Grinevich ◽  
Vl. Nikishin ◽  
N. Mozga ◽  
M. Laitans
Keyword(s):  
Energy Consumption ◽  
Operating Time ◽  
Electrical Energy ◽  
Operating Mode ◽  
Electrical Energy Consumption ◽  
Impact Mechanism ◽  
Threaded Joints ◽  
Rotor Head ◽  
Product Costs ◽  
The Impact

Abstract The paper deals with the possibilities of reducing the consumption of electrical energy of the impact screwdriver during the assembly of fixed threaded joints. The recommendations related to a decrease in electrical energy consumption would allow reducing product costs but so far there have been no such recommendations from the producers of the tool as to the effective operating regimes of the impact screwdrivers in relation to electrical energy consumption and necessary tightening moment of the nut. The aim of the study is to find out the economical operating mode of the electrical impact screwdriver when assembling fixed threaded joints. By varying the set speed of the rotor head and working time of the impact mechanism, there is an opportunity to determine electrical energy consumption of the tool for the given tightening moment. The results of the experiment show that at the same tightening moment obtained the electrical energy consumption of the impact screwdriver is less at a higher starting set speed of the rotor head but shorter operating time of the impact mechanism than at a lower speed of the rotor head and longer operating time of the impact mechanism.

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