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Promoting the Construction of Beautiful and Rich China with the Theory of Soil and Water Ecology
Issue:
Volume 8, Issue 2, April 2020
Pages:
27-31
Received:
18 March 2020
Published:
4 June 2020
Abstract: Started from the problems and perplexities of ecological environment in China, the scientific principle and value of the theory of soil and water ecology are discussed. It is thought that the theory of soil and water ecology clarifies the complicated problems of ecological environment. Environmental pollution can be controlled, but it is only a matter of time and cost. Soil and water ecology is the root of ecological environment problems. The clean water and green mountain are destroyed, which cannot be restored. With the theory of soil and water ecology, the idea that clean water and green mountain are golden and silver mountains is read, as well as the way of turning clean water and green mountain into golden and silver mountains and its different impacts on eco-environment. The developed and underdeveloped areas should treat the idea that clean water and green mountain are golden and silver mountains. The application of the theory of soil and water ecology in soil and water conservation broadens the space of soil and water conservation, and it is necessary to establish a national commission for the conservation of soil and water ecology. The theory of soil and water ecology is the golden key to solve the problems of contemporary ecological environment and the theoretical basis for building a beautiful and rich China.
Abstract: Started from the problems and perplexities of ecological environment in China, the scientific principle and value of the theory of soil and water ecology are discussed. It is thought that the theory of soil and water ecology clarifies the complicated problems of ecological environment. Environmental pollution can be controlled, but it is only a mat...
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Improved Monte Carlo method to Study Road Reliability
Issue:
Volume 8, Issue 2, April 2020
Pages:
32-36
Received:
10 February 2020
Published:
4 June 2020
Abstract: This paper firstly introduces the development of Monte-Carlo method in connectivity reliability and its advantages and disadvantages in the study of road connectivity reliability. Secondly, introduce the traditional Monte Carlo method to calculate the reliability of the connection, and improve the accuracy and speed of the traditional Monte Carlo method, that is, replace the pseudo-random number with Sobol sequence, which overcomes the The shortcomings make the result more accurate and increase the calculation speed from the side. Finally, by comparing the results of the Monte Carlo method and Monte Carlo method for calculating the reliability of road connectivity, the advantages of the improved Monte Carlo method in this respect are obtained. It shows that this method has certain correctness and superiority, and has a positive reference value for the evaluation of the reliability of the road connectivity. The research on the reliability of road connectivity, this paper improves the accuracy and speed of the traditional Monte Carlo method, that is, replacing the pseudo-random numbers with Sobol sequences, which overcomes the shortcomings caused by pseudo-random sequence sampling and makes the results It is more accurate and speeds up calculations from the side. Finally, by comparing the results of improved Monte Carlo method and Monte Carlo method for the seismic reliability calculation of roads, the advantages of improved Monte Carlo method in this respect are obtained. It shows that the method has certain correctness and superiority, and has a positive reference value for road reliability assessment.
Abstract: This paper firstly introduces the development of Monte-Carlo method in connectivity reliability and its advantages and disadvantages in the study of road connectivity reliability. Secondly, introduce the traditional Monte Carlo method to calculate the reliability of the connection, and improve the accuracy and speed of the traditional Monte Carlo m...
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Preparation and Properties of Degradable Metal Materials for Oil and Gas Wells
Zhang Yi,
Liu Jinhu,
Shi Xiaolong,
Chang Gang,
Liu Wentao,
Nie Wei,
Yang Dong
Issue:
Volume 8, Issue 2, April 2020
Pages:
37-42
Received:
3 February 2020
Published:
9 June 2020
Abstract: In the process of measure operation for oil and gas wells, downhole tools may get stuck, which not only delays the construction period, but also increases the operation cost. This paper discusses a kind of degradable metal material which can be used to make downhole tools for oil and gas wells. In order to prepare the material, firstly, according to the requirements of downhole operation technology of oil and gas wells, the overall design idea with magnesium and magnesium alloy as the core was determined, and then the Ni, Ti, Cr, Cu and other metals were determined as auxiliary materials to enhance the alloy strength through electrochemical experiments. After that, these materials are made into degradable metal bars which can be processed by high-temperature and high-pressure die-casting. At last, they are verified by metallographic characterization, tensile impact mechanics experiment, microhardness test, degradation performance and other experiments, which can meet the design and degradation requirements of some downhole tools with low strength requirements. This kind of degradable metal material has the characteristics of light weight, high strength and easy flowback after construction. It is suggested that it should be widely used in downhole tools such as perforating gun, packer, bridge plug and fracturing sliding sleeve.
Abstract: In the process of measure operation for oil and gas wells, downhole tools may get stuck, which not only delays the construction period, but also increases the operation cost. This paper discusses a kind of degradable metal material which can be used to make downhole tools for oil and gas wells. In order to prepare the material, firstly, according t...
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Preparation and Properties of Fungal Mycelium Based on Garden Waste
Issue:
Volume 8, Issue 2, April 2020
Pages:
43-45
Received:
29 April 2020
Published:
9 June 2020
Abstract: With the development of urban afforestation, the increasing of garden waste has become a seriously problem. There are a lot of limitations by the traditional approaches to garden waste utilization and therefore it’s urgent need to explore a new method for garden waste utilization. To solve the problem of using garden waste, we produce a new composite material called fungal mycelium materials at room temperature which based on garden waste and straw. And the composite material is comprised of a substrate of discrete particles and a network of interconnected mycelia cells bonding the discrete particles together. In order to obtain a shorter growth cycle and more excellent properties of fungal mycelium materials, we mixed garden waste and straw in different proportions with oyster mushroom No. 1. The experimental results show that the fungal mycelium materials with good properties by only garden waste. But the speed of fungal mycelia growth accelerated from 14 days to 12 days, the density of the fungal mycelium material reduced from 0.23 g/cm3 to 0.18g/cm3 and the mechanical properties of the fungal mycelium material improved through adding 20wt% straw into the garden waste. The fungal mycelium materials with good mechanical properties, low density, low moisture content and low thermal conductivity could be applied to thermal insulation, packaging and decoration.
Abstract: With the development of urban afforestation, the increasing of garden waste has become a seriously problem. There are a lot of limitations by the traditional approaches to garden waste utilization and therefore it’s urgent need to explore a new method for garden waste utilization. To solve the problem of using garden waste, we produce a new composi...
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