This paper presents an SMES coil which has been designed and tested by University of Cambridge. The design gives the maximum stored energy in wound a certain length second-generation high-temperature superconductors (2G HTS). A numerical model developed to analyse current density magnetic field distribution calculate AC losses during charge discharge process coil. cryostat test I-V curve measurement accomplished. In addition, power electronics control simulated.

Climate change and carbon emissions are major problems which attracting worldwide attention. China has had its pilot emission trading markets in seven regions for more than 3 years. What affects market is a big question. More attention paid to how promotes the schemes whole country. This paper addresses concerns about functioning of takes weekly data from November 25, 2013, March 19, 2017. We employ vector autoregressive model study coal price, oil price stock index have affected China. The...

When encountering high import prices and price volatility, China does not have the power to affect prices, although has ranked first in iron ore imports since 2003. The existing literature usually investigates impact factors of using averaging method. It is difficult depict detailed various on accurately. To provide sounder basis for Chinese government enact policy, this paper develops a quantile regression model with lagged variables measure that under high, medium low levels. analysis uses...

Geothermal energy is one of the cleanest sources which gaining importance as an alternative to hydrocarbons. reserves in China are enormous and it has a huge potential for exploitation utilization. However, development geothermal industry lags far behind other renewable because lack fiscal taxation policy support. In this paper, we adopt system dynamics method use causal loop diagram explore mechanism policies industry. The effect on analyzed. order promote sustainable China, government...

The fatigue crack propagation tests for circular notched compact tension specimens of GH4133B superalloy used in a turbine disk aero-engine are carried out at room temperature. test data shows that the transition region from short to long growth, growth rate appears as fluctuation form with acceleration following deceleration. A quasi harmonic function is constructed model region, and result indicates such suitable describe behavior. metallographic analysis respect microscopic observation...

Due to the fast growth of China's economy, urban atmospheric pollution has become a serious problem affecting public's physical and mental health. The '2 + 26' cities, as Jing-Jin-Ji transmission channel, attracted widespread concern. There were several previous studies on economic loss public health caused by PM2.5 in cities. To assess human this paper used exposure-response model, effect model willingness pay method obtain from with latest available data 2020. It was concluded that, 2020,...

At room temperature, the low cycle fatigue tests for smooth specimens of TC25 titanium alloy under various stress ranges are operated at a CSS280I-20w Electro Hydraulic Servo Universal Testing Machine with microscopic observation system, and lifetimes measured. Based upon analysis stress-strain hysteresis loop alloy, simplified Manson-Coffin formula is derived according to both experimental characteristics constitutive model, plotted against ranges, stress-fatigue life curve obtained by...

The fatigue crack growth tests for nickel-based GH4133B superalloy used in turbine disk of a type aero-engine are carried out at room temperature. stress intensity factor ranges and the rates various ratios measured, corresponding threshold determined. Using Paris formula, experiment data analyzed. It is shown that rate increasing with range ratio, modified formula considering can describe behavior precisely. fracture surface morphologies investigated using scanning electron microscope....

Abstract Rapid urbanization has resulted in severe demands on water, heat and energy resources, which threaten the sustainability of urban economy environment. Geothermal is one cleanest sources energy, it plays an important role regional This paper employs vector autoregressive (VAR) model to assess effects consumption geothermal adoption interactions among these factors. Beijing chosen as a case study investigate water–heat–energy nexus examination relationship between economy. The results...

The high cycle fatigue tests for smooth specimens of TC25 titanium alloy under different stress ratios are carried out on a MTS 809 Material Test Machine at given maximum level 917MPa ambient temperature, the lifetimes such measured, and effects amplitude mean life analyzed. initial resistance is measured two ends specimen alloy, every certain cycles, test interrupted, current values various cycles measured. ratio change adopted to characterize damage evolution in modified Chaboche model...

Behavior of circular pressure tunnel lining is analyzed by Reinforced Concrete Finite Element Method (RCFEM) and following characteristics are found: the maximum width dose not occur at highest head; cracking hydraulic head increases while surrounding rock have larger deformation modulus, but crack do vary apparently; in can be controlled effectively inner reinforcement more than outer there steel bars middle lining; bears less forces actually after linear calculation because loss stiffness;...

The fatigue crack initiation life at various stress ratios for GH4133B superalloy specimen with different circular notch radios are studied ambient temperature and atmospheric pressure utilizing the fracture mechanics method. It is shown that a controlling parameter Δ K I / ρ 0.5 can be adopted to characterize life, effect of radius on increases increasing control parameter, while firstly then decreases ratio. surfaces notched compact tension specimens tests investigated using scanning...

The short fatigue crack growth tests for circular notched compact tension specimens of GH4133B superalloy used in turbine disk aero-engine are carried out at ambient temperature and atmospheric pressure. stress intensity factor ranges the rates various ratios measured, corresponding effective considering closure effect calculated. It is shown that range Δ K eff , can be applied to describe deceleration acceleration rate during propagation. fracture surface morphologies region investigated...

The flight process often in turbulence. Atmospheric turbulence causes bump, long time will cause damage to the aircraft structure fatigue. This paper establishes a model for atmospheric disturbance, simulation. Based on through all kinds of disturbance is studied. use embedded database and real-time simulation platform, built run, PC machine can be used dynamic simulator.