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An original vibrational energy harvesting device with regard to the vibrational performance of far-end cables was designed under the condition that no power can be supplied to the far end of freight cableways in transmission and distribution projects. The device was designed to have a Y-shaped radial gear-rack structure. The random vibrations of the cable are converted into three one-way rotary motions of a Y-shaped device terminal using a Y-shaped rack unit and one-way gear-rack units. The device then harvests the electric energy through a super-capacitor and supplies power to equipment in areas out of the reach of the power supply along the cableway. An analysis and dynamic simulation of the Y-shaped rack unit and one-way gear-rack units demonstrate that the Y-shaped layout of the device adapts well to the random vibration of the cable. The device was proven to have successfully harvested the vibrational energy of the cable in several directions on its radial plane, showing good prospects in supplying power to far-end wireless surveillance equipment for freight cableways in remote mountainous areas.

Hydrogen station siting plays an important role in hydrogen-energy infrastructure construction, and it's different from gas station siting. A gas station has a unitary way of fuel transport and a unitary fuel supplier, hence no consideration given to factors like fuel supplier and way of fuel transport at the time of siting it. However, hydrogen for a hydrogen fueling station can be supplied jointly from a couple of different sources nearby. Since there is a diversity of hydrogen price and productivity between different sources, hydrogen fueling station siting also entails consideration of the effect of the proportions of hydrogen supplied by the sources on hydrogen's life cycle cost. With the purpose of minimizing hydrogen's life cycle cost, this paper creates a mathematical model for station siting, largely for the case that each station can get hydrogen supply from combined multiple sources, and considers the effect of geographical information factors on station siting. The effect of geographical information factors on such siting is described herein in two cases to avoid selecting a must-not-build location and rebuilding into a gasoline-hydrogen fueling station at an existing gas station location. The latter can reduce station construction and operating costs. By creating a particle swarm optimization (PSO) example for station siting with Shanghai-Nanjing Expressway and constructing a position particle swarm in the form of 5D vector in order to optimize 5 station locations at the same time as well a weight particle swarm in the form of 2D matrix in order to optimize the multi-source hydrogen supply programs, the paper works out optimal station construction locations on condition of multi-source hydrogen supply, multi-source hydrogen supply programs, ways of storage and transport and corresponding hydrogen's optimal life cycle cost.

Collection, transfer and storage of solid waste cannot do without hoisting work. Hoisting operators are usually exposed to bad working circumstances. Studying the precise on-ground locating of solid waste carriers and auto offset correcting gripper design with no need of precise locating are the key to accomplishing unattended operation. This paper proposes a combination of slidable flat washer and four-jaw auto-centering chuck to meet the clamping requirement and provide millimeter-grade carrier locating precision; realization of auto offset correction by use of the clamping jaws of a quasi-planetary gear structure is a guarantee of hoisting work on the carrier in the condition of gripper swinging. The feasibility of the fruit of the paper has been verified by hoisting work in the disposal of nuclear waste and hazardous waste.

Composite pressure vessel has been applied by NASA for the first time. Safe low-cost efficient composite hydrogen-storing device is a key technique affecting the generalization and application of hydrogen energy. By combining the shear theory and based on the highly heave-stable shear behavior shell structure lightweight design, this paper describes researches on the lightweight design of pressure vessel lining and, on the basis of completing the numerical analysis of hydrogen storage tank, extracts its stress isogram, achieving the conformity or tangency of fiber weaving type with stress load isoline and accomplishing lightweight design of the tank and reduced production cost. The method herein can be further generalized to the storage of hydrogen energy and pipe component design.