Research on the Influence Mechanism of Block Chain on the Credit of Transportation Capacity Supply Chain Finance

This paper aims at the promotion of the application of inclusive financing into transportation capacity financing by combining transportation capacity supply chain with block chain technology as a brand-new financing topic. It focuses on the influencing mechanism by block chain on credit access, credit line, and credit supervision. From the perspective of “transportation” finance, the application of block chain in different scenarios is demonstrated after analyzing the attenuation process of credit transmission in the supply chain, the reviewing of two credit line evaluation methods of business self-compensation and credit guarantee, and the reviewing of regulatory requirements in transaction closed-loop, delivery closed-loop, and capital closed-loop; therefore the 3 major influencing mechanisms by block chain on the transportation capacity supply chain financing credit granting are discovered, indicating the effective improvement of financial institutions participation and better credit line for the financing of micro, medium, and small transportation enterprises (SMEs) by the application of block chain technology.

Research on Measures for Development of Nanjing Rail-water Intermodal Transportation based on Development of Hub Economy

At present, the proportion of railroad and waterway cargo transportation in China’s cargo transportation system is growing year by year, and Rail-water intermodal transportation is highly efficient and less polluting, which is very suitable for the current economic development, and its development has inestimable potential. Facing the growing demand for transportation, it is of special significance to improve the transportation capacity and management level of Rail-water transportation in China. This paper first analyzes the development foundation and environment of Nanjing port, then takes Longtan port as an example and proposes the main measures such as improving Nanjing’s Rail-water transportation infrastructure construction, integrating railroad resources, reforming operation and management, and formulating port cluster development planning.

Where to cut to delay a pandemic with minimum disruption? mathematical analysis based on the SIS model

We consider the problem of modifying a network topology in such a way as to delay the propagation of a disease with minimal disruption of the network capacity to reroute goods/items/passengers. We find an approximate solution to the Susceptible-Infected-Susceptible (SIS) model, which constitutes an upper bound to its exact solution. This upper bound allows direct structure-epidemic dynamic relations via the total communicability function. Using this approach we propose a strategy to remove edges in a network that significantly delays the propagation of a disease across the network with minimal disruption of its capacity to deliver goods/items/passengers. We apply this strategy to the analysis of the UK airport transportation network weighted by the number of passengers transported in 2003. We find that the removal of all flights connecting four origin-destination pairs in the UK delays the propagation of a disease by more than 300%, with a minimal deterioration of the transportation capacity of this network. These time delays in the propagation of a disease represent an important non-pharmaceutical intervention to confront an epidemic, allowing for better preparations of the health systems, while keeping the economy moving with minimal disruptions.

Island Ecological Tourism: Constructing Indicators of the Tourist Service System in the Penghu National Scenic Area

It is critical to develop a sustainable ecotourism service system for the fragile Penghu National Scenic Area in Taiwan. This study, therefore, adopted the fuzzy Delphi method and analytic hierarchy process (AHP) to establish an index framework. The results identified four dimensions with 21 service factors. The findings are as follows. Safety management capability is found to be the main factor in the ecotourism service system. Ecological diversity is essential for the marine environment and the core resource for ecotourism; the transportation capacity and environmental quality need to be improved. Marine environmental resources are indispensable to the development of ecotourism. In addition, the local community must support ecotourism, natural resources should be protected, and the development of ecotourism needs to support the sustainability of local conservation. Therefore, encouraging local residents and stakeholders to attend and promote ecotourism, establishing a safety management system for ecotourism, developing environmental protection regulations for tourists in ecotourism, and improving tourist satisfaction are vital. The government needs to develop guidelines for the protection of marine resources, plan an ecotourism service system, and improve public and transportation infrastructure to make it safe and accessible.

Study on the Stability of Coal Pillars Under the Disturbance of Repeated Mining in a Double-Roadway Layout System

The double-roadway layout system, which is extensively applied in large mines, has the potential to significantly balance excavation-mining and improve mine ventilation and transportation capacity. However, the coal pillar in the double-roadway layout system is easily destabilized due to the disturbance of repeated mining, which has a significant impact on the safety and reliability of coal mines. This paper takes the coal pillar and its supporting structure of the double-roadway layout system as the research object, establishes a UDEC trigon numerical calculation model, and systematically corrects the input parameters, while explaining the excavation method of roadways and the simulation method of the supporting structure element. The numerical simulation results show that under the conventional support intensity conditions, the internal damage of the coal pillar during the excavation period is about 20%, while the internal damage to the coal pillar develops to 55% throughout the first-panel mining. During the disturbance of repeated mining, the damage in the coal pillar increased to 90%, and the coal pillar was already in a state of failure. Under the combined control of rock bolts and counter-pulled anchor cables, the coal pillar damage does not change significantly during the excavation and first-panel mining. During the disturbance of repeated mining, the damage of the coal pillar is reduced to 63%. There is a certain low damage area in the coal pillar, which can ensure the stability of the coal pillar and its supporting structure as a whole. Furthermore, the on-site monitoring results show that the maximum value of the floor-to-roof and rib-to-rib convergence of a W1310 tailgate during the repeated mining disturbance stage is 730 and 620 mm, respectively. The findings of this study give an approach to—as well as estimated values for the design of, including its “small structure” control technical parameters—the double-roadway layout system.

Optimization of a Mixed Refrigerant Based H2 Liquefaction Pre-Cooling Process and Estimate of Liquefaction Performance with Varying Ambient Temperature

Hydrogen used as an energy carrier can provide an important route to the decarbonization of energy supplies, but realizing this opportunity will require both significantly increased production and transportation capacity. One route to increased transportation capacity is the shipping of liquid hydrogen, but this requires an energy-intensive liquefaction step. Recent study work has shown that the energy required in this process can be reduced through the implementation of new and improved process designs, but since all low-temperature processes are affected by the available heat-sink temperature, local ambient conditions will also have an impact. The objective of this work is to identify how the energy consumption associated with hydrogen liquefaction varies with heat-sink temperature through the optimization of design parameters for a next-generation mixed refrigerant based hydrogen liquefaction process. The results show that energy consumption increases by around 20% across the cooling temperature range 5 to 50 °C. Considering just the range 20 to 30 °C, there is a 5% increase, illustrating the significant impact ambient temperature can have on energy consumption. The implications of this work are that the modelling of different liquified hydrogen based energy supply chains should take the impact of ambient temperature into account.

Optimization of a H2 Liquefaction Pre-Cooling Process & Estimate of Liquefaction Performance with Varying Ambient Temperature

Hydrogen used as an energy carrier can provide an important route to the decarbonization of energy supplies. However, realizing this opportunity requires a significant increase in both production and transportation capacity. Part of the increase in transportation capacity could be provided by the shipping of liquid hydrogen, but this introduces an energy-intensive liquefaction step into the supply-chain. The energy required for liquefaction can be reduced by developing improved process designs, but since all low-temperature processes are affected by the available heat-sink temperature, local ambient conditions will also affect the energy penalty. This work studies how the energy consumption associated with liquefaction varies with heat-sink temperature through the optimization of design parameters for a typical next-generation hydrogen liquefaction process. The results show that energy consumption increases by around 20%, across the cooling temperature range 5 to 50 °C. Considering just the range 20 to 30 °C there is a 5% increase, illustrating the significant impact ambient temperature can have on energy consumption.

ESTIMATION OF THE DISTANCE BETWEEN STATIONS OF OVERTAKING TRAINS WHEN ORGANIZING A MIXED HIGH-SPEED, PASSENGER AND FREIGHT TRAFFIC ON A RAILWAY LINE

Purpose. This paper presents the calculation method and result of reasonable station spacing in the organization of mixed high-speed passenger and freight transportation, at different speed combinations and different types of train schedules. Methodology. By using the principle of the shortest distance between stations, this paper analyzes the possible layout of passenger and freight trains running at different speeds between Brest and Moscow, and work out the optimal distance between overtaking stations. According to the shortest distance between stations, the blocking method with four-digit automatic should be used when the maximum speed of the passenger train is 250 km/h. The crossing scheme for different types of trains is determined, and the train schedule period (TDS) of each scheme is determined. Calculate the appropriate distance between stations that had been passed through with different trip intervals according to the characteristics of the passing passenger and freight trains. By adopting simulation analysis, the influence of different number of trains and their composition on the station spacing is simulated to work out the reasonable railway station spacing for passenger and freight train with a speed of 250 km / h. Findings. In the case of passenger and freight traffic with the speed of 250 km / h, the optimal distance for stations between Brest and Moscow should be around 35 km. In order to make effective use of the existing infrastructure and achieve maximum transit capacity of the railway, it is recommended to increase the speed of the low priority trains. Originality. The distance between stations on a line will affect the number of stations on the entire line, as well as the maximum train speed and the number of train pairs. Excessive or insufficient station spacing will affect the transportation capacity and efficiency. Therefore, reasonable station spacing will determine the number of trains and the maximum speed of each train for both passenger and freight. Practical value. This paper proposes a method to estimate the reasonable spacing between crossing stations, which can ensure the effective utilization of the capacity of railway sections when high speed passenger trains on existing lines are running at speeds of up to 250 km/h.